You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
3592 lines
292 KiB
3592 lines
292 KiB
6 years ago
|
!function(e){if("object"==typeof exports&&"undefined"!=typeof module)module.exports=e();else if("function"==typeof define&&define.amd)define([],e);else{var f;"undefined"!=typeof window?f=window:"undefined"!=typeof global?f=global:"undefined"!=typeof self&&(f=self),f.jsondiffpatch=e()}}(function(){var define,module,exports;return (function e(t,n,r){function s(o,u){if(!n[o]){if(!t[o]){var a=typeof require=="function"&&require;if(!u&&a)return a(o,!0);if(i)return i(o,!0);var f=new Error("Cannot find module '"+o+"'");throw f.code="MODULE_NOT_FOUND",f}var l=n[o]={exports:{}};t[o][0].call(l.exports,function(e){var n=t[o][1][e];return s(n?n:e)},l,l.exports,e,t,n,r)}return n[o].exports}var i=typeof require=="function"&&require;for(var o=0;o<r.length;o++)s(r[o]);return s})({1:[function(require,module,exports){
|
||
|
|
var environment = require('./environment');
|
||
|
|
|
||
|
|
if (environment.isBrowser) {
|
||
|
|
/* global window */
|
||
|
|
/* jshint camelcase: false */
|
||
|
|
window.diff_match_patch = require('../public/external/diff_match_patch_uncompressed');
|
||
|
|
/* jshint camelcase: true */
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = require('./main');
|
||
|
|
|
||
|
|
},{"../public/external/diff_match_patch_uncompressed":2,"./environment":10,"./main":17}],2:[function(require,module,exports){
|
||
|
|
/**
|
||
|
|
* Diff Match and Patch
|
||
|
|
*
|
||
|
|
* Copyright 2006 Google Inc.
|
||
|
|
* http://code.google.com/p/google-diff-match-patch/
|
||
|
|
*
|
||
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
||
|
|
* you may not use this file except in compliance with the License.
|
||
|
|
* You may obtain a copy of the License at
|
||
|
|
*
|
||
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
||
|
|
*
|
||
|
|
* Unless required by applicable law or agreed to in writing, software
|
||
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
||
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
||
|
|
* See the License for the specific language governing permissions and
|
||
|
|
* limitations under the License.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @fileoverview Computes the difference between two texts to create a patch.
|
||
|
|
* Applies the patch onto another text, allowing for errors.
|
||
|
|
* @author fraser@google.com (Neil Fraser)
|
||
|
|
*/
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Class containing the diff, match and patch methods.
|
||
|
|
* @constructor
|
||
|
|
*/
|
||
|
|
function diff_match_patch() {
|
||
|
|
|
||
|
|
// Defaults.
|
||
|
|
// Redefine these in your program to override the defaults.
|
||
|
|
|
||
|
|
// Number of seconds to map a diff before giving up (0 for infinity).
|
||
|
|
this.Diff_Timeout = 1.0;
|
||
|
|
// Cost of an empty edit operation in terms of edit characters.
|
||
|
|
this.Diff_EditCost = 4;
|
||
|
|
// At what point is no match declared (0.0 = perfection, 1.0 = very loose).
|
||
|
|
this.Match_Threshold = 0.5;
|
||
|
|
// How far to search for a match (0 = exact location, 1000+ = broad match).
|
||
|
|
// A match this many characters away from the expected location will add
|
||
|
|
// 1.0 to the score (0.0 is a perfect match).
|
||
|
|
this.Match_Distance = 1000;
|
||
|
|
// When deleting a large block of text (over ~64 characters), how close does
|
||
|
|
// the contents have to match the expected contents. (0.0 = perfection,
|
||
|
|
// 1.0 = very loose). Note that Match_Threshold controls how closely the
|
||
|
|
// end points of a delete need to match.
|
||
|
|
this.Patch_DeleteThreshold = 0.5;
|
||
|
|
// Chunk size for context length.
|
||
|
|
this.Patch_Margin = 4;
|
||
|
|
|
||
|
|
// The number of bits in an int.
|
||
|
|
this.Match_MaxBits = 32;
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// DIFF FUNCTIONS
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* The data structure representing a diff is an array of tuples:
|
||
|
|
* [[DIFF_DELETE, 'Hello'], [DIFF_INSERT, 'Goodbye'], [DIFF_EQUAL, ' world.']]
|
||
|
|
* which means: delete 'Hello', add 'Goodbye' and keep ' world.'
|
||
|
|
*/
|
||
|
|
var DIFF_DELETE = -1;
|
||
|
|
var DIFF_INSERT = 1;
|
||
|
|
var DIFF_EQUAL = 0;
|
||
|
|
|
||
|
|
/** @typedef {!Array.<number|string>} */
|
||
|
|
diff_match_patch.Diff;
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Find the differences between two texts. Simplifies the problem by stripping
|
||
|
|
* any common prefix or suffix off the texts before diffing.
|
||
|
|
* @param {string} text1 Old string to be diffed.
|
||
|
|
* @param {string} text2 New string to be diffed.
|
||
|
|
* @param {boolean=} opt_checklines Optional speedup flag. If present and false,
|
||
|
|
* then don't run a line-level diff first to identify the changed areas.
|
||
|
|
* Defaults to true, which does a faster, slightly less optimal diff.
|
||
|
|
* @param {number} opt_deadline Optional time when the diff should be complete
|
||
|
|
* by. Used internally for recursive calls. Users should set DiffTimeout
|
||
|
|
* instead.
|
||
|
|
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_main = function(text1, text2, opt_checklines,
|
||
|
|
opt_deadline) {
|
||
|
|
// Set a deadline by which time the diff must be complete.
|
||
|
|
if (typeof opt_deadline == 'undefined') {
|
||
|
|
if (this.Diff_Timeout <= 0) {
|
||
|
|
opt_deadline = Number.MAX_VALUE;
|
||
|
|
} else {
|
||
|
|
opt_deadline = (new Date).getTime() + this.Diff_Timeout * 1000;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
var deadline = opt_deadline;
|
||
|
|
|
||
|
|
// Check for null inputs.
|
||
|
|
if (text1 == null || text2 == null) {
|
||
|
|
throw new Error('Null input. (diff_main)');
|
||
|
|
}
|
||
|
|
|
||
|
|
// Check for equality (speedup).
|
||
|
|
if (text1 == text2) {
|
||
|
|
if (text1) {
|
||
|
|
return [[DIFF_EQUAL, text1]];
|
||
|
|
}
|
||
|
|
return [];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof opt_checklines == 'undefined') {
|
||
|
|
opt_checklines = true;
|
||
|
|
}
|
||
|
|
var checklines = opt_checklines;
|
||
|
|
|
||
|
|
// Trim off common prefix (speedup).
|
||
|
|
var commonlength = this.diff_commonPrefix(text1, text2);
|
||
|
|
var commonprefix = text1.substring(0, commonlength);
|
||
|
|
text1 = text1.substring(commonlength);
|
||
|
|
text2 = text2.substring(commonlength);
|
||
|
|
|
||
|
|
// Trim off common suffix (speedup).
|
||
|
|
commonlength = this.diff_commonSuffix(text1, text2);
|
||
|
|
var commonsuffix = text1.substring(text1.length - commonlength);
|
||
|
|
text1 = text1.substring(0, text1.length - commonlength);
|
||
|
|
text2 = text2.substring(0, text2.length - commonlength);
|
||
|
|
|
||
|
|
// Compute the diff on the middle block.
|
||
|
|
var diffs = this.diff_compute_(text1, text2, checklines, deadline);
|
||
|
|
|
||
|
|
// Restore the prefix and suffix.
|
||
|
|
if (commonprefix) {
|
||
|
|
diffs.unshift([DIFF_EQUAL, commonprefix]);
|
||
|
|
}
|
||
|
|
if (commonsuffix) {
|
||
|
|
diffs.push([DIFF_EQUAL, commonsuffix]);
|
||
|
|
}
|
||
|
|
this.diff_cleanupMerge(diffs);
|
||
|
|
return diffs;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Find the differences between two texts. Assumes that the texts do not
|
||
|
|
* have any common prefix or suffix.
|
||
|
|
* @param {string} text1 Old string to be diffed.
|
||
|
|
* @param {string} text2 New string to be diffed.
|
||
|
|
* @param {boolean} checklines Speedup flag. If false, then don't run a
|
||
|
|
* line-level diff first to identify the changed areas.
|
||
|
|
* If true, then run a faster, slightly less optimal diff.
|
||
|
|
* @param {number} deadline Time when the diff should be complete by.
|
||
|
|
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_compute_ = function(text1, text2, checklines,
|
||
|
|
deadline) {
|
||
|
|
var diffs;
|
||
|
|
|
||
|
|
if (!text1) {
|
||
|
|
// Just add some text (speedup).
|
||
|
|
return [[DIFF_INSERT, text2]];
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!text2) {
|
||
|
|
// Just delete some text (speedup).
|
||
|
|
return [[DIFF_DELETE, text1]];
|
||
|
|
}
|
||
|
|
|
||
|
|
var longtext = text1.length > text2.length ? text1 : text2;
|
||
|
|
var shorttext = text1.length > text2.length ? text2 : text1;
|
||
|
|
var i = longtext.indexOf(shorttext);
|
||
|
|
if (i != -1) {
|
||
|
|
// Shorter text is inside the longer text (speedup).
|
||
|
|
diffs = [[DIFF_INSERT, longtext.substring(0, i)],
|
||
|
|
[DIFF_EQUAL, shorttext],
|
||
|
|
[DIFF_INSERT, longtext.substring(i + shorttext.length)]];
|
||
|
|
// Swap insertions for deletions if diff is reversed.
|
||
|
|
if (text1.length > text2.length) {
|
||
|
|
diffs[0][0] = diffs[2][0] = DIFF_DELETE;
|
||
|
|
}
|
||
|
|
return diffs;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (shorttext.length == 1) {
|
||
|
|
// Single character string.
|
||
|
|
// After the previous speedup, the character can't be an equality.
|
||
|
|
return [[DIFF_DELETE, text1], [DIFF_INSERT, text2]];
|
||
|
|
}
|
||
|
|
longtext = shorttext = null; // Garbage collect.
|
||
|
|
|
||
|
|
// Check to see if the problem can be split in two.
|
||
|
|
var hm = this.diff_halfMatch_(text1, text2);
|
||
|
|
if (hm) {
|
||
|
|
// A half-match was found, sort out the return data.
|
||
|
|
var text1_a = hm[0];
|
||
|
|
var text1_b = hm[1];
|
||
|
|
var text2_a = hm[2];
|
||
|
|
var text2_b = hm[3];
|
||
|
|
var mid_common = hm[4];
|
||
|
|
// Send both pairs off for separate processing.
|
||
|
|
var diffs_a = this.diff_main(text1_a, text2_a, checklines, deadline);
|
||
|
|
var diffs_b = this.diff_main(text1_b, text2_b, checklines, deadline);
|
||
|
|
// Merge the results.
|
||
|
|
return diffs_a.concat([[DIFF_EQUAL, mid_common]], diffs_b);
|
||
|
|
}
|
||
|
|
|
||
|
|
if (checklines && text1.length > 100 && text2.length > 100) {
|
||
|
|
return this.diff_lineMode_(text1, text2, deadline);
|
||
|
|
}
|
||
|
|
|
||
|
|
return this.diff_bisect_(text1, text2, deadline);
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Do a quick line-level diff on both strings, then rediff the parts for
|
||
|
|
* greater accuracy.
|
||
|
|
* This speedup can produce non-minimal diffs.
|
||
|
|
* @param {string} text1 Old string to be diffed.
|
||
|
|
* @param {string} text2 New string to be diffed.
|
||
|
|
* @param {number} deadline Time when the diff should be complete by.
|
||
|
|
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_lineMode_ = function(text1, text2, deadline) {
|
||
|
|
// Scan the text on a line-by-line basis first.
|
||
|
|
var a = this.diff_linesToChars_(text1, text2);
|
||
|
|
text1 = /** @type {string} */(a[0]);
|
||
|
|
text2 = /** @type {string} */(a[1]);
|
||
|
|
var linearray = /** @type {!Array.<string>} */(a[2]);
|
||
|
|
|
||
|
|
var diffs = this.diff_bisect_(text1, text2, deadline);
|
||
|
|
|
||
|
|
// Convert the diff back to original text.
|
||
|
|
this.diff_charsToLines_(diffs, linearray);
|
||
|
|
// Eliminate freak matches (e.g. blank lines)
|
||
|
|
this.diff_cleanupSemantic(diffs);
|
||
|
|
|
||
|
|
// Rediff any replacement blocks, this time character-by-character.
|
||
|
|
// Add a dummy entry at the end.
|
||
|
|
diffs.push([DIFF_EQUAL, '']);
|
||
|
|
var pointer = 0;
|
||
|
|
var count_delete = 0;
|
||
|
|
var count_insert = 0;
|
||
|
|
var text_delete = '';
|
||
|
|
var text_insert = '';
|
||
|
|
while (pointer < diffs.length) {
|
||
|
|
switch (diffs[pointer][0]) {
|
||
|
|
case DIFF_INSERT:
|
||
|
|
count_insert++;
|
||
|
|
text_insert += diffs[pointer][1];
|
||
|
|
break;
|
||
|
|
case DIFF_DELETE:
|
||
|
|
count_delete++;
|
||
|
|
text_delete += diffs[pointer][1];
|
||
|
|
break;
|
||
|
|
case DIFF_EQUAL:
|
||
|
|
// Upon reaching an equality, check for prior redundancies.
|
||
|
|
if (count_delete >= 1 && count_insert >= 1) {
|
||
|
|
// Delete the offending records and add the merged ones.
|
||
|
|
var a = this.diff_main(text_delete, text_insert, false, deadline);
|
||
|
|
diffs.splice(pointer - count_delete - count_insert,
|
||
|
|
count_delete + count_insert);
|
||
|
|
pointer = pointer - count_delete - count_insert;
|
||
|
|
for (var j = a.length - 1; j >= 0; j--) {
|
||
|
|
diffs.splice(pointer, 0, a[j]);
|
||
|
|
}
|
||
|
|
pointer = pointer + a.length;
|
||
|
|
}
|
||
|
|
count_insert = 0;
|
||
|
|
count_delete = 0;
|
||
|
|
text_delete = '';
|
||
|
|
text_insert = '';
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
pointer++;
|
||
|
|
}
|
||
|
|
diffs.pop(); // Remove the dummy entry at the end.
|
||
|
|
|
||
|
|
return diffs;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Find the 'middle snake' of a diff, split the problem in two
|
||
|
|
* and return the recursively constructed diff.
|
||
|
|
* See Myers 1986 paper: An O(ND) Difference Algorithm and Its Variations.
|
||
|
|
* @param {string} text1 Old string to be diffed.
|
||
|
|
* @param {string} text2 New string to be diffed.
|
||
|
|
* @param {number} deadline Time at which to bail if not yet complete.
|
||
|
|
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_bisect_ = function(text1, text2, deadline) {
|
||
|
|
// Cache the text lengths to prevent multiple calls.
|
||
|
|
var text1_length = text1.length;
|
||
|
|
var text2_length = text2.length;
|
||
|
|
var max_d = Math.ceil((text1_length + text2_length) / 2);
|
||
|
|
var v_offset = max_d;
|
||
|
|
var v_length = 2 * max_d;
|
||
|
|
var v1 = new Array(v_length);
|
||
|
|
var v2 = new Array(v_length);
|
||
|
|
// Setting all elements to -1 is faster in Chrome & Firefox than mixing
|
||
|
|
// integers and undefined.
|
||
|
|
for (var x = 0; x < v_length; x++) {
|
||
|
|
v1[x] = -1;
|
||
|
|
v2[x] = -1;
|
||
|
|
}
|
||
|
|
v1[v_offset + 1] = 0;
|
||
|
|
v2[v_offset + 1] = 0;
|
||
|
|
var delta = text1_length - text2_length;
|
||
|
|
// If the total number of characters is odd, then the front path will collide
|
||
|
|
// with the reverse path.
|
||
|
|
var front = (delta % 2 != 0);
|
||
|
|
// Offsets for start and end of k loop.
|
||
|
|
// Prevents mapping of space beyond the grid.
|
||
|
|
var k1start = 0;
|
||
|
|
var k1end = 0;
|
||
|
|
var k2start = 0;
|
||
|
|
var k2end = 0;
|
||
|
|
for (var d = 0; d < max_d; d++) {
|
||
|
|
// Bail out if deadline is reached.
|
||
|
|
if ((new Date()).getTime() > deadline) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Walk the front path one step.
|
||
|
|
for (var k1 = -d + k1start; k1 <= d - k1end; k1 += 2) {
|
||
|
|
var k1_offset = v_offset + k1;
|
||
|
|
var x1;
|
||
|
|
if (k1 == -d || k1 != d && v1[k1_offset - 1] < v1[k1_offset + 1]) {
|
||
|
|
x1 = v1[k1_offset + 1];
|
||
|
|
} else {
|
||
|
|
x1 = v1[k1_offset - 1] + 1;
|
||
|
|
}
|
||
|
|
var y1 = x1 - k1;
|
||
|
|
while (x1 < text1_length && y1 < text2_length &&
|
||
|
|
text1.charAt(x1) == text2.charAt(y1)) {
|
||
|
|
x1++;
|
||
|
|
y1++;
|
||
|
|
}
|
||
|
|
v1[k1_offset] = x1;
|
||
|
|
if (x1 > text1_length) {
|
||
|
|
// Ran off the right of the graph.
|
||
|
|
k1end += 2;
|
||
|
|
} else if (y1 > text2_length) {
|
||
|
|
// Ran off the bottom of the graph.
|
||
|
|
k1start += 2;
|
||
|
|
} else if (front) {
|
||
|
|
var k2_offset = v_offset + delta - k1;
|
||
|
|
if (k2_offset >= 0 && k2_offset < v_length && v2[k2_offset] != -1) {
|
||
|
|
// Mirror x2 onto top-left coordinate system.
|
||
|
|
var x2 = text1_length - v2[k2_offset];
|
||
|
|
if (x1 >= x2) {
|
||
|
|
// Overlap detected.
|
||
|
|
return this.diff_bisectSplit_(text1, text2, x1, y1, deadline);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Walk the reverse path one step.
|
||
|
|
for (var k2 = -d + k2start; k2 <= d - k2end; k2 += 2) {
|
||
|
|
var k2_offset = v_offset + k2;
|
||
|
|
var x2;
|
||
|
|
if (k2 == -d || k2 != d && v2[k2_offset - 1] < v2[k2_offset + 1]) {
|
||
|
|
x2 = v2[k2_offset + 1];
|
||
|
|
} else {
|
||
|
|
x2 = v2[k2_offset - 1] + 1;
|
||
|
|
}
|
||
|
|
var y2 = x2 - k2;
|
||
|
|
while (x2 < text1_length && y2 < text2_length &&
|
||
|
|
text1.charAt(text1_length - x2 - 1) ==
|
||
|
|
text2.charAt(text2_length - y2 - 1)) {
|
||
|
|
x2++;
|
||
|
|
y2++;
|
||
|
|
}
|
||
|
|
v2[k2_offset] = x2;
|
||
|
|
if (x2 > text1_length) {
|
||
|
|
// Ran off the left of the graph.
|
||
|
|
k2end += 2;
|
||
|
|
} else if (y2 > text2_length) {
|
||
|
|
// Ran off the top of the graph.
|
||
|
|
k2start += 2;
|
||
|
|
} else if (!front) {
|
||
|
|
var k1_offset = v_offset + delta - k2;
|
||
|
|
if (k1_offset >= 0 && k1_offset < v_length && v1[k1_offset] != -1) {
|
||
|
|
var x1 = v1[k1_offset];
|
||
|
|
var y1 = v_offset + x1 - k1_offset;
|
||
|
|
// Mirror x2 onto top-left coordinate system.
|
||
|
|
x2 = text1_length - x2;
|
||
|
|
if (x1 >= x2) {
|
||
|
|
// Overlap detected.
|
||
|
|
return this.diff_bisectSplit_(text1, text2, x1, y1, deadline);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Diff took too long and hit the deadline or
|
||
|
|
// number of diffs equals number of characters, no commonality at all.
|
||
|
|
return [[DIFF_DELETE, text1], [DIFF_INSERT, text2]];
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Given the location of the 'middle snake', split the diff in two parts
|
||
|
|
* and recurse.
|
||
|
|
* @param {string} text1 Old string to be diffed.
|
||
|
|
* @param {string} text2 New string to be diffed.
|
||
|
|
* @param {number} x Index of split point in text1.
|
||
|
|
* @param {number} y Index of split point in text2.
|
||
|
|
* @param {number} deadline Time at which to bail if not yet complete.
|
||
|
|
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_bisectSplit_ = function(text1, text2, x, y,
|
||
|
|
deadline) {
|
||
|
|
var text1a = text1.substring(0, x);
|
||
|
|
var text2a = text2.substring(0, y);
|
||
|
|
var text1b = text1.substring(x);
|
||
|
|
var text2b = text2.substring(y);
|
||
|
|
|
||
|
|
// Compute both diffs serially.
|
||
|
|
var diffs = this.diff_main(text1a, text2a, false, deadline);
|
||
|
|
var diffsb = this.diff_main(text1b, text2b, false, deadline);
|
||
|
|
|
||
|
|
return diffs.concat(diffsb);
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Split two texts into an array of strings. Reduce the texts to a string of
|
||
|
|
* hashes where each Unicode character represents one line.
|
||
|
|
* @param {string} text1 First string.
|
||
|
|
* @param {string} text2 Second string.
|
||
|
|
* @return {!Array.<string|!Array.<string>>} Three element Array, containing the
|
||
|
|
* encoded text1, the encoded text2 and the array of unique strings. The
|
||
|
|
* zeroth element of the array of unique strings is intentionally blank.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_linesToChars_ = function(text1, text2) {
|
||
|
|
var lineArray = []; // e.g. lineArray[4] == 'Hello\n'
|
||
|
|
var lineHash = {}; // e.g. lineHash['Hello\n'] == 4
|
||
|
|
|
||
|
|
// '\x00' is a valid character, but various debuggers don't like it.
|
||
|
|
// So we'll insert a junk entry to avoid generating a null character.
|
||
|
|
lineArray[0] = '';
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Split a text into an array of strings. Reduce the texts to a string of
|
||
|
|
* hashes where each Unicode character represents one line.
|
||
|
|
* Modifies linearray and linehash through being a closure.
|
||
|
|
* @param {string} text String to encode.
|
||
|
|
* @return {string} Encoded string.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function diff_linesToCharsMunge_(text) {
|
||
|
|
var chars = '';
|
||
|
|
// Walk the text, pulling out a substring for each line.
|
||
|
|
// text.split('\n') would would temporarily double our memory footprint.
|
||
|
|
// Modifying text would create many large strings to garbage collect.
|
||
|
|
var lineStart = 0;
|
||
|
|
var lineEnd = -1;
|
||
|
|
// Keeping our own length variable is faster than looking it up.
|
||
|
|
var lineArrayLength = lineArray.length;
|
||
|
|
while (lineEnd < text.length - 1) {
|
||
|
|
lineEnd = text.indexOf('\n', lineStart);
|
||
|
|
if (lineEnd == -1) {
|
||
|
|
lineEnd = text.length - 1;
|
||
|
|
}
|
||
|
|
var line = text.substring(lineStart, lineEnd + 1);
|
||
|
|
lineStart = lineEnd + 1;
|
||
|
|
|
||
|
|
if (lineHash.hasOwnProperty ? lineHash.hasOwnProperty(line) :
|
||
|
|
(lineHash[line] !== undefined)) {
|
||
|
|
chars += String.fromCharCode(lineHash[line]);
|
||
|
|
} else {
|
||
|
|
chars += String.fromCharCode(lineArrayLength);
|
||
|
|
lineHash[line] = lineArrayLength;
|
||
|
|
lineArray[lineArrayLength++] = line;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return chars;
|
||
|
|
}
|
||
|
|
|
||
|
|
var chars1 = diff_linesToCharsMunge_(text1);
|
||
|
|
var chars2 = diff_linesToCharsMunge_(text2);
|
||
|
|
return [chars1, chars2, lineArray];
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Rehydrate the text in a diff from a string of line hashes to real lines of
|
||
|
|
* text.
|
||
|
|
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
|
||
|
|
* @param {!Array.<string>} lineArray Array of unique strings.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_charsToLines_ = function(diffs, lineArray) {
|
||
|
|
for (var x = 0; x < diffs.length; x++) {
|
||
|
|
var chars = diffs[x][1];
|
||
|
|
var text = [];
|
||
|
|
for (var y = 0; y < chars.length; y++) {
|
||
|
|
text[y] = lineArray[chars.charCodeAt(y)];
|
||
|
|
}
|
||
|
|
diffs[x][1] = text.join('');
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Determine the common prefix of two strings.
|
||
|
|
* @param {string} text1 First string.
|
||
|
|
* @param {string} text2 Second string.
|
||
|
|
* @return {number} The number of characters common to the start of each
|
||
|
|
* string.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_commonPrefix = function(text1, text2) {
|
||
|
|
// Quick check for common null cases.
|
||
|
|
if (!text1 || !text2 || text1.charAt(0) != text2.charAt(0)) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
// Binary search.
|
||
|
|
// Performance analysis: http://neil.fraser.name/news/2007/10/09/
|
||
|
|
var pointermin = 0;
|
||
|
|
var pointermax = Math.min(text1.length, text2.length);
|
||
|
|
var pointermid = pointermax;
|
||
|
|
var pointerstart = 0;
|
||
|
|
while (pointermin < pointermid) {
|
||
|
|
if (text1.substring(pointerstart, pointermid) ==
|
||
|
|
text2.substring(pointerstart, pointermid)) {
|
||
|
|
pointermin = pointermid;
|
||
|
|
pointerstart = pointermin;
|
||
|
|
} else {
|
||
|
|
pointermax = pointermid;
|
||
|
|
}
|
||
|
|
pointermid = Math.floor((pointermax - pointermin) / 2 + pointermin);
|
||
|
|
}
|
||
|
|
return pointermid;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Determine the common suffix of two strings.
|
||
|
|
* @param {string} text1 First string.
|
||
|
|
* @param {string} text2 Second string.
|
||
|
|
* @return {number} The number of characters common to the end of each string.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_commonSuffix = function(text1, text2) {
|
||
|
|
// Quick check for common null cases.
|
||
|
|
if (!text1 || !text2 ||
|
||
|
|
text1.charAt(text1.length - 1) != text2.charAt(text2.length - 1)) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
// Binary search.
|
||
|
|
// Performance analysis: http://neil.fraser.name/news/2007/10/09/
|
||
|
|
var pointermin = 0;
|
||
|
|
var pointermax = Math.min(text1.length, text2.length);
|
||
|
|
var pointermid = pointermax;
|
||
|
|
var pointerend = 0;
|
||
|
|
while (pointermin < pointermid) {
|
||
|
|
if (text1.substring(text1.length - pointermid, text1.length - pointerend) ==
|
||
|
|
text2.substring(text2.length - pointermid, text2.length - pointerend)) {
|
||
|
|
pointermin = pointermid;
|
||
|
|
pointerend = pointermin;
|
||
|
|
} else {
|
||
|
|
pointermax = pointermid;
|
||
|
|
}
|
||
|
|
pointermid = Math.floor((pointermax - pointermin) / 2 + pointermin);
|
||
|
|
}
|
||
|
|
return pointermid;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Determine if the suffix of one string is the prefix of another.
|
||
|
|
* @param {string} text1 First string.
|
||
|
|
* @param {string} text2 Second string.
|
||
|
|
* @return {number} The number of characters common to the end of the first
|
||
|
|
* string and the start of the second string.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_commonOverlap_ = function(text1, text2) {
|
||
|
|
// Cache the text lengths to prevent multiple calls.
|
||
|
|
var text1_length = text1.length;
|
||
|
|
var text2_length = text2.length;
|
||
|
|
// Eliminate the null case.
|
||
|
|
if (text1_length == 0 || text2_length == 0) {
|
||
|
|
return 0;
|
||
|
|
}
|
||
|
|
// Truncate the longer string.
|
||
|
|
if (text1_length > text2_length) {
|
||
|
|
text1 = text1.substring(text1_length - text2_length);
|
||
|
|
} else if (text1_length < text2_length) {
|
||
|
|
text2 = text2.substring(0, text1_length);
|
||
|
|
}
|
||
|
|
var text_length = Math.min(text1_length, text2_length);
|
||
|
|
// Quick check for the worst case.
|
||
|
|
if (text1 == text2) {
|
||
|
|
return text_length;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Start by looking for a single character match
|
||
|
|
// and increase length until no match is found.
|
||
|
|
// Performance analysis: http://neil.fraser.name/news/2010/11/04/
|
||
|
|
var best = 0;
|
||
|
|
var length = 1;
|
||
|
|
while (true) {
|
||
|
|
var pattern = text1.substring(text_length - length);
|
||
|
|
var found = text2.indexOf(pattern);
|
||
|
|
if (found == -1) {
|
||
|
|
return best;
|
||
|
|
}
|
||
|
|
length += found;
|
||
|
|
if (found == 0 || text1.substring(text_length - length) ==
|
||
|
|
text2.substring(0, length)) {
|
||
|
|
best = length;
|
||
|
|
length++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Do the two texts share a substring which is at least half the length of the
|
||
|
|
* longer text?
|
||
|
|
* This speedup can produce non-minimal diffs.
|
||
|
|
* @param {string} text1 First string.
|
||
|
|
* @param {string} text2 Second string.
|
||
|
|
* @return {Array.<string>} Five element Array, containing the prefix of
|
||
|
|
* text1, the suffix of text1, the prefix of text2, the suffix of
|
||
|
|
* text2 and the common middle. Or null if there was no match.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_halfMatch_ = function(text1, text2) {
|
||
|
|
if (this.Diff_Timeout <= 0) {
|
||
|
|
// Don't risk returning a non-optimal diff if we have unlimited time.
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
var longtext = text1.length > text2.length ? text1 : text2;
|
||
|
|
var shorttext = text1.length > text2.length ? text2 : text1;
|
||
|
|
if (longtext.length < 4 || shorttext.length * 2 < longtext.length) {
|
||
|
|
return null; // Pointless.
|
||
|
|
}
|
||
|
|
var dmp = this; // 'this' becomes 'window' in a closure.
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Does a substring of shorttext exist within longtext such that the substring
|
||
|
|
* is at least half the length of longtext?
|
||
|
|
* Closure, but does not reference any external variables.
|
||
|
|
* @param {string} longtext Longer string.
|
||
|
|
* @param {string} shorttext Shorter string.
|
||
|
|
* @param {number} i Start index of quarter length substring within longtext.
|
||
|
|
* @return {Array.<string>} Five element Array, containing the prefix of
|
||
|
|
* longtext, the suffix of longtext, the prefix of shorttext, the suffix
|
||
|
|
* of shorttext and the common middle. Or null if there was no match.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function diff_halfMatchI_(longtext, shorttext, i) {
|
||
|
|
// Start with a 1/4 length substring at position i as a seed.
|
||
|
|
var seed = longtext.substring(i, i + Math.floor(longtext.length / 4));
|
||
|
|
var j = -1;
|
||
|
|
var best_common = '';
|
||
|
|
var best_longtext_a, best_longtext_b, best_shorttext_a, best_shorttext_b;
|
||
|
|
while ((j = shorttext.indexOf(seed, j + 1)) != -1) {
|
||
|
|
var prefixLength = dmp.diff_commonPrefix(longtext.substring(i),
|
||
|
|
shorttext.substring(j));
|
||
|
|
var suffixLength = dmp.diff_commonSuffix(longtext.substring(0, i),
|
||
|
|
shorttext.substring(0, j));
|
||
|
|
if (best_common.length < suffixLength + prefixLength) {
|
||
|
|
best_common = shorttext.substring(j - suffixLength, j) +
|
||
|
|
shorttext.substring(j, j + prefixLength);
|
||
|
|
best_longtext_a = longtext.substring(0, i - suffixLength);
|
||
|
|
best_longtext_b = longtext.substring(i + prefixLength);
|
||
|
|
best_shorttext_a = shorttext.substring(0, j - suffixLength);
|
||
|
|
best_shorttext_b = shorttext.substring(j + prefixLength);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (best_common.length * 2 >= longtext.length) {
|
||
|
|
return [best_longtext_a, best_longtext_b,
|
||
|
|
best_shorttext_a, best_shorttext_b, best_common];
|
||
|
|
} else {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// First check if the second quarter is the seed for a half-match.
|
||
|
|
var hm1 = diff_halfMatchI_(longtext, shorttext,
|
||
|
|
Math.ceil(longtext.length / 4));
|
||
|
|
// Check again based on the third quarter.
|
||
|
|
var hm2 = diff_halfMatchI_(longtext, shorttext,
|
||
|
|
Math.ceil(longtext.length / 2));
|
||
|
|
var hm;
|
||
|
|
if (!hm1 && !hm2) {
|
||
|
|
return null;
|
||
|
|
} else if (!hm2) {
|
||
|
|
hm = hm1;
|
||
|
|
} else if (!hm1) {
|
||
|
|
hm = hm2;
|
||
|
|
} else {
|
||
|
|
// Both matched. Select the longest.
|
||
|
|
hm = hm1[4].length > hm2[4].length ? hm1 : hm2;
|
||
|
|
}
|
||
|
|
|
||
|
|
// A half-match was found, sort out the return data.
|
||
|
|
var text1_a, text1_b, text2_a, text2_b;
|
||
|
|
if (text1.length > text2.length) {
|
||
|
|
text1_a = hm[0];
|
||
|
|
text1_b = hm[1];
|
||
|
|
text2_a = hm[2];
|
||
|
|
text2_b = hm[3];
|
||
|
|
} else {
|
||
|
|
text2_a = hm[0];
|
||
|
|
text2_b = hm[1];
|
||
|
|
text1_a = hm[2];
|
||
|
|
text1_b = hm[3];
|
||
|
|
}
|
||
|
|
var mid_common = hm[4];
|
||
|
|
return [text1_a, text1_b, text2_a, text2_b, mid_common];
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reduce the number of edits by eliminating semantically trivial equalities.
|
||
|
|
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_cleanupSemantic = function(diffs) {
|
||
|
|
var changes = false;
|
||
|
|
var equalities = []; // Stack of indices where equalities are found.
|
||
|
|
var equalitiesLength = 0; // Keeping our own length var is faster in JS.
|
||
|
|
/** @type {?string} */
|
||
|
|
var lastequality = null; // Always equal to equalities[equalitiesLength-1][1]
|
||
|
|
var pointer = 0; // Index of current position.
|
||
|
|
// Number of characters that changed prior to the equality.
|
||
|
|
var length_insertions1 = 0;
|
||
|
|
var length_deletions1 = 0;
|
||
|
|
// Number of characters that changed after the equality.
|
||
|
|
var length_insertions2 = 0;
|
||
|
|
var length_deletions2 = 0;
|
||
|
|
while (pointer < diffs.length) {
|
||
|
|
if (diffs[pointer][0] == DIFF_EQUAL) { // Equality found.
|
||
|
|
equalities[equalitiesLength++] = pointer;
|
||
|
|
length_insertions1 = length_insertions2;
|
||
|
|
length_deletions1 = length_deletions2;
|
||
|
|
length_insertions2 = 0;
|
||
|
|
length_deletions2 = 0;
|
||
|
|
lastequality = /** @type {string} */(diffs[pointer][1]);
|
||
|
|
} else { // An insertion or deletion.
|
||
|
|
if (diffs[pointer][0] == DIFF_INSERT) {
|
||
|
|
length_insertions2 += diffs[pointer][1].length;
|
||
|
|
} else {
|
||
|
|
length_deletions2 += diffs[pointer][1].length;
|
||
|
|
}
|
||
|
|
// Eliminate an equality that is smaller or equal to the edits on both
|
||
|
|
// sides of it.
|
||
|
|
if (lastequality !== null && (lastequality.length <=
|
||
|
|
Math.max(length_insertions1, length_deletions1)) &&
|
||
|
|
(lastequality.length <= Math.max(length_insertions2,
|
||
|
|
length_deletions2))) {
|
||
|
|
// Duplicate record.
|
||
|
|
diffs.splice(equalities[equalitiesLength - 1], 0,
|
||
|
|
[DIFF_DELETE, lastequality]);
|
||
|
|
// Change second copy to insert.
|
||
|
|
diffs[equalities[equalitiesLength - 1] + 1][0] = DIFF_INSERT;
|
||
|
|
// Throw away the equality we just deleted.
|
||
|
|
equalitiesLength--;
|
||
|
|
// Throw away the previous equality (it needs to be reevaluated).
|
||
|
|
equalitiesLength--;
|
||
|
|
pointer = equalitiesLength > 0 ? equalities[equalitiesLength - 1] : -1;
|
||
|
|
length_insertions1 = 0; // Reset the counters.
|
||
|
|
length_deletions1 = 0;
|
||
|
|
length_insertions2 = 0;
|
||
|
|
length_deletions2 = 0;
|
||
|
|
lastequality = null;
|
||
|
|
changes = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
pointer++;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Normalize the diff.
|
||
|
|
if (changes) {
|
||
|
|
this.diff_cleanupMerge(diffs);
|
||
|
|
}
|
||
|
|
this.diff_cleanupSemanticLossless(diffs);
|
||
|
|
|
||
|
|
// Find any overlaps between deletions and insertions.
|
||
|
|
// e.g: <del>abcxxx</del><ins>xxxdef</ins>
|
||
|
|
// -> <del>abc</del>xxx<ins>def</ins>
|
||
|
|
// Only extract an overlap if it is as big as the edit ahead or behind it.
|
||
|
|
pointer = 1;
|
||
|
|
while (pointer < diffs.length) {
|
||
|
|
if (diffs[pointer - 1][0] == DIFF_DELETE &&
|
||
|
|
diffs[pointer][0] == DIFF_INSERT) {
|
||
|
|
var deletion = /** @type {string} */(diffs[pointer - 1][1]);
|
||
|
|
var insertion = /** @type {string} */(diffs[pointer][1]);
|
||
|
|
var overlap_length = this.diff_commonOverlap_(deletion, insertion);
|
||
|
|
if (overlap_length >= deletion.length / 2 ||
|
||
|
|
overlap_length >= insertion.length / 2) {
|
||
|
|
// Overlap found. Insert an equality and trim the surrounding edits.
|
||
|
|
diffs.splice(pointer, 0,
|
||
|
|
[DIFF_EQUAL, insertion.substring(0, overlap_length)]);
|
||
|
|
diffs[pointer - 1][1] =
|
||
|
|
deletion.substring(0, deletion.length - overlap_length);
|
||
|
|
diffs[pointer + 1][1] = insertion.substring(overlap_length);
|
||
|
|
pointer++;
|
||
|
|
}
|
||
|
|
pointer++;
|
||
|
|
}
|
||
|
|
pointer++;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Look for single edits surrounded on both sides by equalities
|
||
|
|
* which can be shifted sideways to align the edit to a word boundary.
|
||
|
|
* e.g: The c<ins>at c</ins>ame. -> The <ins>cat </ins>came.
|
||
|
|
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_cleanupSemanticLossless = function(diffs) {
|
||
|
|
// Define some regex patterns for matching boundaries.
|
||
|
|
var punctuation = /[^a-zA-Z0-9]/;
|
||
|
|
var whitespace = /\s/;
|
||
|
|
var linebreak = /[\r\n]/;
|
||
|
|
var blanklineEnd = /\n\r?\n$/;
|
||
|
|
var blanklineStart = /^\r?\n\r?\n/;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Given two strings, compute a score representing whether the internal
|
||
|
|
* boundary falls on logical boundaries.
|
||
|
|
* Scores range from 5 (best) to 0 (worst).
|
||
|
|
* Closure, makes reference to regex patterns defined above.
|
||
|
|
* @param {string} one First string.
|
||
|
|
* @param {string} two Second string.
|
||
|
|
* @return {number} The score.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function diff_cleanupSemanticScore_(one, two) {
|
||
|
|
if (!one || !two) {
|
||
|
|
// Edges are the best.
|
||
|
|
return 5;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Each port of this function behaves slightly differently due to
|
||
|
|
// subtle differences in each language's definition of things like
|
||
|
|
// 'whitespace'. Since this function's purpose is largely cosmetic,
|
||
|
|
// the choice has been made to use each language's native features
|
||
|
|
// rather than force total conformity.
|
||
|
|
var score = 0;
|
||
|
|
// One point for non-alphanumeric.
|
||
|
|
if (one.charAt(one.length - 1).match(punctuation) ||
|
||
|
|
two.charAt(0).match(punctuation)) {
|
||
|
|
score++;
|
||
|
|
// Two points for whitespace.
|
||
|
|
if (one.charAt(one.length - 1).match(whitespace) ||
|
||
|
|
two.charAt(0).match(whitespace)) {
|
||
|
|
score++;
|
||
|
|
// Three points for line breaks.
|
||
|
|
if (one.charAt(one.length - 1).match(linebreak) ||
|
||
|
|
two.charAt(0).match(linebreak)) {
|
||
|
|
score++;
|
||
|
|
// Four points for blank lines.
|
||
|
|
if (one.match(blanklineEnd) || two.match(blanklineStart)) {
|
||
|
|
score++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return score;
|
||
|
|
}
|
||
|
|
|
||
|
|
var pointer = 1;
|
||
|
|
// Intentionally ignore the first and last element (don't need checking).
|
||
|
|
while (pointer < diffs.length - 1) {
|
||
|
|
if (diffs[pointer - 1][0] == DIFF_EQUAL &&
|
||
|
|
diffs[pointer + 1][0] == DIFF_EQUAL) {
|
||
|
|
// This is a single edit surrounded by equalities.
|
||
|
|
var equality1 = /** @type {string} */(diffs[pointer - 1][1]);
|
||
|
|
var edit = /** @type {string} */(diffs[pointer][1]);
|
||
|
|
var equality2 = /** @type {string} */(diffs[pointer + 1][1]);
|
||
|
|
|
||
|
|
// First, shift the edit as far left as possible.
|
||
|
|
var commonOffset = this.diff_commonSuffix(equality1, edit);
|
||
|
|
if (commonOffset) {
|
||
|
|
var commonString = edit.substring(edit.length - commonOffset);
|
||
|
|
equality1 = equality1.substring(0, equality1.length - commonOffset);
|
||
|
|
edit = commonString + edit.substring(0, edit.length - commonOffset);
|
||
|
|
equality2 = commonString + equality2;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Second, step character by character right, looking for the best fit.
|
||
|
|
var bestEquality1 = equality1;
|
||
|
|
var bestEdit = edit;
|
||
|
|
var bestEquality2 = equality2;
|
||
|
|
var bestScore = diff_cleanupSemanticScore_(equality1, edit) +
|
||
|
|
diff_cleanupSemanticScore_(edit, equality2);
|
||
|
|
while (edit.charAt(0) === equality2.charAt(0)) {
|
||
|
|
equality1 += edit.charAt(0);
|
||
|
|
edit = edit.substring(1) + equality2.charAt(0);
|
||
|
|
equality2 = equality2.substring(1);
|
||
|
|
var score = diff_cleanupSemanticScore_(equality1, edit) +
|
||
|
|
diff_cleanupSemanticScore_(edit, equality2);
|
||
|
|
// The >= encourages trailing rather than leading whitespace on edits.
|
||
|
|
if (score >= bestScore) {
|
||
|
|
bestScore = score;
|
||
|
|
bestEquality1 = equality1;
|
||
|
|
bestEdit = edit;
|
||
|
|
bestEquality2 = equality2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (diffs[pointer - 1][1] != bestEquality1) {
|
||
|
|
// We have an improvement, save it back to the diff.
|
||
|
|
if (bestEquality1) {
|
||
|
|
diffs[pointer - 1][1] = bestEquality1;
|
||
|
|
} else {
|
||
|
|
diffs.splice(pointer - 1, 1);
|
||
|
|
pointer--;
|
||
|
|
}
|
||
|
|
diffs[pointer][1] = bestEdit;
|
||
|
|
if (bestEquality2) {
|
||
|
|
diffs[pointer + 1][1] = bestEquality2;
|
||
|
|
} else {
|
||
|
|
diffs.splice(pointer + 1, 1);
|
||
|
|
pointer--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
pointer++;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reduce the number of edits by eliminating operationally trivial equalities.
|
||
|
|
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_cleanupEfficiency = function(diffs) {
|
||
|
|
var changes = false;
|
||
|
|
var equalities = []; // Stack of indices where equalities are found.
|
||
|
|
var equalitiesLength = 0; // Keeping our own length var is faster in JS.
|
||
|
|
var lastequality = ''; // Always equal to equalities[equalitiesLength-1][1]
|
||
|
|
var pointer = 0; // Index of current position.
|
||
|
|
// Is there an insertion operation before the last equality.
|
||
|
|
var pre_ins = false;
|
||
|
|
// Is there a deletion operation before the last equality.
|
||
|
|
var pre_del = false;
|
||
|
|
// Is there an insertion operation after the last equality.
|
||
|
|
var post_ins = false;
|
||
|
|
// Is there a deletion operation after the last equality.
|
||
|
|
var post_del = false;
|
||
|
|
while (pointer < diffs.length) {
|
||
|
|
if (diffs[pointer][0] == DIFF_EQUAL) { // Equality found.
|
||
|
|
if (diffs[pointer][1].length < this.Diff_EditCost &&
|
||
|
|
(post_ins || post_del)) {
|
||
|
|
// Candidate found.
|
||
|
|
equalities[equalitiesLength++] = pointer;
|
||
|
|
pre_ins = post_ins;
|
||
|
|
pre_del = post_del;
|
||
|
|
lastequality = diffs[pointer][1];
|
||
|
|
} else {
|
||
|
|
// Not a candidate, and can never become one.
|
||
|
|
equalitiesLength = 0;
|
||
|
|
lastequality = '';
|
||
|
|
}
|
||
|
|
post_ins = post_del = false;
|
||
|
|
} else { // An insertion or deletion.
|
||
|
|
if (diffs[pointer][0] == DIFF_DELETE) {
|
||
|
|
post_del = true;
|
||
|
|
} else {
|
||
|
|
post_ins = true;
|
||
|
|
}
|
||
|
|
/*
|
||
|
|
* Five types to be split:
|
||
|
|
* <ins>A</ins><del>B</del>XY<ins>C</ins><del>D</del>
|
||
|
|
* <ins>A</ins>X<ins>C</ins><del>D</del>
|
||
|
|
* <ins>A</ins><del>B</del>X<ins>C</ins>
|
||
|
|
* <ins>A</del>X<ins>C</ins><del>D</del>
|
||
|
|
* <ins>A</ins><del>B</del>X<del>C</del>
|
||
|
|
*/
|
||
|
|
if (lastequality && ((pre_ins && pre_del && post_ins && post_del) ||
|
||
|
|
((lastequality.length < this.Diff_EditCost / 2) &&
|
||
|
|
(pre_ins + pre_del + post_ins + post_del) == 3))) {
|
||
|
|
// Duplicate record.
|
||
|
|
diffs.splice(equalities[equalitiesLength - 1], 0,
|
||
|
|
[DIFF_DELETE, lastequality]);
|
||
|
|
// Change second copy to insert.
|
||
|
|
diffs[equalities[equalitiesLength - 1] + 1][0] = DIFF_INSERT;
|
||
|
|
equalitiesLength--; // Throw away the equality we just deleted;
|
||
|
|
lastequality = '';
|
||
|
|
if (pre_ins && pre_del) {
|
||
|
|
// No changes made which could affect previous entry, keep going.
|
||
|
|
post_ins = post_del = true;
|
||
|
|
equalitiesLength = 0;
|
||
|
|
} else {
|
||
|
|
equalitiesLength--; // Throw away the previous equality.
|
||
|
|
pointer = equalitiesLength > 0 ?
|
||
|
|
equalities[equalitiesLength - 1] : -1;
|
||
|
|
post_ins = post_del = false;
|
||
|
|
}
|
||
|
|
changes = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
pointer++;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (changes) {
|
||
|
|
this.diff_cleanupMerge(diffs);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Reorder and merge like edit sections. Merge equalities.
|
||
|
|
* Any edit section can move as long as it doesn't cross an equality.
|
||
|
|
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_cleanupMerge = function(diffs) {
|
||
|
|
diffs.push([DIFF_EQUAL, '']); // Add a dummy entry at the end.
|
||
|
|
var pointer = 0;
|
||
|
|
var count_delete = 0;
|
||
|
|
var count_insert = 0;
|
||
|
|
var text_delete = '';
|
||
|
|
var text_insert = '';
|
||
|
|
var commonlength;
|
||
|
|
while (pointer < diffs.length) {
|
||
|
|
switch (diffs[pointer][0]) {
|
||
|
|
case DIFF_INSERT:
|
||
|
|
count_insert++;
|
||
|
|
text_insert += diffs[pointer][1];
|
||
|
|
pointer++;
|
||
|
|
break;
|
||
|
|
case DIFF_DELETE:
|
||
|
|
count_delete++;
|
||
|
|
text_delete += diffs[pointer][1];
|
||
|
|
pointer++;
|
||
|
|
break;
|
||
|
|
case DIFF_EQUAL:
|
||
|
|
// Upon reaching an equality, check for prior redundancies.
|
||
|
|
if (count_delete + count_insert > 1) {
|
||
|
|
if (count_delete !== 0 && count_insert !== 0) {
|
||
|
|
// Factor out any common prefixies.
|
||
|
|
commonlength = this.diff_commonPrefix(text_insert, text_delete);
|
||
|
|
if (commonlength !== 0) {
|
||
|
|
if ((pointer - count_delete - count_insert) > 0 &&
|
||
|
|
diffs[pointer - count_delete - count_insert - 1][0] ==
|
||
|
|
DIFF_EQUAL) {
|
||
|
|
diffs[pointer - count_delete - count_insert - 1][1] +=
|
||
|
|
text_insert.substring(0, commonlength);
|
||
|
|
} else {
|
||
|
|
diffs.splice(0, 0, [DIFF_EQUAL,
|
||
|
|
text_insert.substring(0, commonlength)]);
|
||
|
|
pointer++;
|
||
|
|
}
|
||
|
|
text_insert = text_insert.substring(commonlength);
|
||
|
|
text_delete = text_delete.substring(commonlength);
|
||
|
|
}
|
||
|
|
// Factor out any common suffixies.
|
||
|
|
commonlength = this.diff_commonSuffix(text_insert, text_delete);
|
||
|
|
if (commonlength !== 0) {
|
||
|
|
diffs[pointer][1] = text_insert.substring(text_insert.length -
|
||
|
|
commonlength) + diffs[pointer][1];
|
||
|
|
text_insert = text_insert.substring(0, text_insert.length -
|
||
|
|
commonlength);
|
||
|
|
text_delete = text_delete.substring(0, text_delete.length -
|
||
|
|
commonlength);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Delete the offending records and add the merged ones.
|
||
|
|
if (count_delete === 0) {
|
||
|
|
diffs.splice(pointer - count_delete - count_insert,
|
||
|
|
count_delete + count_insert, [DIFF_INSERT, text_insert]);
|
||
|
|
} else if (count_insert === 0) {
|
||
|
|
diffs.splice(pointer - count_delete - count_insert,
|
||
|
|
count_delete + count_insert, [DIFF_DELETE, text_delete]);
|
||
|
|
} else {
|
||
|
|
diffs.splice(pointer - count_delete - count_insert,
|
||
|
|
count_delete + count_insert, [DIFF_DELETE, text_delete],
|
||
|
|
[DIFF_INSERT, text_insert]);
|
||
|
|
}
|
||
|
|
pointer = pointer - count_delete - count_insert +
|
||
|
|
(count_delete ? 1 : 0) + (count_insert ? 1 : 0) + 1;
|
||
|
|
} else if (pointer !== 0 && diffs[pointer - 1][0] == DIFF_EQUAL) {
|
||
|
|
// Merge this equality with the previous one.
|
||
|
|
diffs[pointer - 1][1] += diffs[pointer][1];
|
||
|
|
diffs.splice(pointer, 1);
|
||
|
|
} else {
|
||
|
|
pointer++;
|
||
|
|
}
|
||
|
|
count_insert = 0;
|
||
|
|
count_delete = 0;
|
||
|
|
text_delete = '';
|
||
|
|
text_insert = '';
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (diffs[diffs.length - 1][1] === '') {
|
||
|
|
diffs.pop(); // Remove the dummy entry at the end.
|
||
|
|
}
|
||
|
|
|
||
|
|
// Second pass: look for single edits surrounded on both sides by equalities
|
||
|
|
// which can be shifted sideways to eliminate an equality.
|
||
|
|
// e.g: A<ins>BA</ins>C -> <ins>AB</ins>AC
|
||
|
|
var changes = false;
|
||
|
|
pointer = 1;
|
||
|
|
// Intentionally ignore the first and last element (don't need checking).
|
||
|
|
while (pointer < diffs.length - 1) {
|
||
|
|
if (diffs[pointer - 1][0] == DIFF_EQUAL &&
|
||
|
|
diffs[pointer + 1][0] == DIFF_EQUAL) {
|
||
|
|
// This is a single edit surrounded by equalities.
|
||
|
|
if (diffs[pointer][1].substring(diffs[pointer][1].length -
|
||
|
|
diffs[pointer - 1][1].length) == diffs[pointer - 1][1]) {
|
||
|
|
// Shift the edit over the previous equality.
|
||
|
|
diffs[pointer][1] = diffs[pointer - 1][1] +
|
||
|
|
diffs[pointer][1].substring(0, diffs[pointer][1].length -
|
||
|
|
diffs[pointer - 1][1].length);
|
||
|
|
diffs[pointer + 1][1] = diffs[pointer - 1][1] + diffs[pointer + 1][1];
|
||
|
|
diffs.splice(pointer - 1, 1);
|
||
|
|
changes = true;
|
||
|
|
} else if (diffs[pointer][1].substring(0, diffs[pointer + 1][1].length) ==
|
||
|
|
diffs[pointer + 1][1]) {
|
||
|
|
// Shift the edit over the next equality.
|
||
|
|
diffs[pointer - 1][1] += diffs[pointer + 1][1];
|
||
|
|
diffs[pointer][1] =
|
||
|
|
diffs[pointer][1].substring(diffs[pointer + 1][1].length) +
|
||
|
|
diffs[pointer + 1][1];
|
||
|
|
diffs.splice(pointer + 1, 1);
|
||
|
|
changes = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
pointer++;
|
||
|
|
}
|
||
|
|
// If shifts were made, the diff needs reordering and another shift sweep.
|
||
|
|
if (changes) {
|
||
|
|
this.diff_cleanupMerge(diffs);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* loc is a location in text1, compute and return the equivalent location in
|
||
|
|
* text2.
|
||
|
|
* e.g. 'The cat' vs 'The big cat', 1->1, 5->8
|
||
|
|
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
|
||
|
|
* @param {number} loc Location within text1.
|
||
|
|
* @return {number} Location within text2.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_xIndex = function(diffs, loc) {
|
||
|
|
var chars1 = 0;
|
||
|
|
var chars2 = 0;
|
||
|
|
var last_chars1 = 0;
|
||
|
|
var last_chars2 = 0;
|
||
|
|
var x;
|
||
|
|
for (x = 0; x < diffs.length; x++) {
|
||
|
|
if (diffs[x][0] !== DIFF_INSERT) { // Equality or deletion.
|
||
|
|
chars1 += diffs[x][1].length;
|
||
|
|
}
|
||
|
|
if (diffs[x][0] !== DIFF_DELETE) { // Equality or insertion.
|
||
|
|
chars2 += diffs[x][1].length;
|
||
|
|
}
|
||
|
|
if (chars1 > loc) { // Overshot the location.
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
last_chars1 = chars1;
|
||
|
|
last_chars2 = chars2;
|
||
|
|
}
|
||
|
|
// Was the location was deleted?
|
||
|
|
if (diffs.length != x && diffs[x][0] === DIFF_DELETE) {
|
||
|
|
return last_chars2;
|
||
|
|
}
|
||
|
|
// Add the remaining character length.
|
||
|
|
return last_chars2 + (loc - last_chars1);
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Convert a diff array into a pretty HTML report.
|
||
|
|
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
|
||
|
|
* @return {string} HTML representation.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_prettyHtml = function(diffs) {
|
||
|
|
var html = [];
|
||
|
|
var i = 0;
|
||
|
|
var pattern_amp = /&/g;
|
||
|
|
var pattern_lt = /</g;
|
||
|
|
var pattern_gt = />/g;
|
||
|
|
var pattern_para = /\n/g;
|
||
|
|
for (var x = 0; x < diffs.length; x++) {
|
||
|
|
var op = diffs[x][0]; // Operation (insert, delete, equal)
|
||
|
|
var data = diffs[x][1]; // Text of change.
|
||
|
|
var text = data.replace(pattern_amp, '&').replace(pattern_lt, '<')
|
||
|
|
.replace(pattern_gt, '>').replace(pattern_para, '¶<br>');
|
||
|
|
switch (op) {
|
||
|
|
case DIFF_INSERT:
|
||
|
|
html[x] = '<ins style="background:#e6ffe6;">' + text + '</ins>';
|
||
|
|
break;
|
||
|
|
case DIFF_DELETE:
|
||
|
|
html[x] = '<del style="background:#ffe6e6;">' + text + '</del>';
|
||
|
|
break;
|
||
|
|
case DIFF_EQUAL:
|
||
|
|
html[x] = '<span>' + text + '</span>';
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
if (op !== DIFF_DELETE) {
|
||
|
|
i += data.length;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return html.join('');
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compute and return the source text (all equalities and deletions).
|
||
|
|
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
|
||
|
|
* @return {string} Source text.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_text1 = function(diffs) {
|
||
|
|
var text = [];
|
||
|
|
for (var x = 0; x < diffs.length; x++) {
|
||
|
|
if (diffs[x][0] !== DIFF_INSERT) {
|
||
|
|
text[x] = diffs[x][1];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return text.join('');
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compute and return the destination text (all equalities and insertions).
|
||
|
|
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
|
||
|
|
* @return {string} Destination text.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_text2 = function(diffs) {
|
||
|
|
var text = [];
|
||
|
|
for (var x = 0; x < diffs.length; x++) {
|
||
|
|
if (diffs[x][0] !== DIFF_DELETE) {
|
||
|
|
text[x] = diffs[x][1];
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return text.join('');
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compute the Levenshtein distance; the number of inserted, deleted or
|
||
|
|
* substituted characters.
|
||
|
|
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
|
||
|
|
* @return {number} Number of changes.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_levenshtein = function(diffs) {
|
||
|
|
var levenshtein = 0;
|
||
|
|
var insertions = 0;
|
||
|
|
var deletions = 0;
|
||
|
|
for (var x = 0; x < diffs.length; x++) {
|
||
|
|
var op = diffs[x][0];
|
||
|
|
var data = diffs[x][1];
|
||
|
|
switch (op) {
|
||
|
|
case DIFF_INSERT:
|
||
|
|
insertions += data.length;
|
||
|
|
break;
|
||
|
|
case DIFF_DELETE:
|
||
|
|
deletions += data.length;
|
||
|
|
break;
|
||
|
|
case DIFF_EQUAL:
|
||
|
|
// A deletion and an insertion is one substitution.
|
||
|
|
levenshtein += Math.max(insertions, deletions);
|
||
|
|
insertions = 0;
|
||
|
|
deletions = 0;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
levenshtein += Math.max(insertions, deletions);
|
||
|
|
return levenshtein;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Crush the diff into an encoded string which describes the operations
|
||
|
|
* required to transform text1 into text2.
|
||
|
|
* E.g. =3\t-2\t+ing -> Keep 3 chars, delete 2 chars, insert 'ing'.
|
||
|
|
* Operations are tab-separated. Inserted text is escaped using %xx notation.
|
||
|
|
* @param {!Array.<!diff_match_patch.Diff>} diffs Array of diff tuples.
|
||
|
|
* @return {string} Delta text.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_toDelta = function(diffs) {
|
||
|
|
var text = [];
|
||
|
|
for (var x = 0; x < diffs.length; x++) {
|
||
|
|
switch (diffs[x][0]) {
|
||
|
|
case DIFF_INSERT:
|
||
|
|
text[x] = '+' + encodeURI(diffs[x][1]);
|
||
|
|
break;
|
||
|
|
case DIFF_DELETE:
|
||
|
|
text[x] = '-' + diffs[x][1].length;
|
||
|
|
break;
|
||
|
|
case DIFF_EQUAL:
|
||
|
|
text[x] = '=' + diffs[x][1].length;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return text.join('\t').replace(/%20/g, ' ');
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Given the original text1, and an encoded string which describes the
|
||
|
|
* operations required to transform text1 into text2, compute the full diff.
|
||
|
|
* @param {string} text1 Source string for the diff.
|
||
|
|
* @param {string} delta Delta text.
|
||
|
|
* @return {!Array.<!diff_match_patch.Diff>} Array of diff tuples.
|
||
|
|
* @throws {!Error} If invalid input.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.diff_fromDelta = function(text1, delta) {
|
||
|
|
var diffs = [];
|
||
|
|
var diffsLength = 0; // Keeping our own length var is faster in JS.
|
||
|
|
var pointer = 0; // Cursor in text1
|
||
|
|
var tokens = delta.split(/\t/g);
|
||
|
|
for (var x = 0; x < tokens.length; x++) {
|
||
|
|
// Each token begins with a one character parameter which specifies the
|
||
|
|
// operation of this token (delete, insert, equality).
|
||
|
|
var param = tokens[x].substring(1);
|
||
|
|
switch (tokens[x].charAt(0)) {
|
||
|
|
case '+':
|
||
|
|
try {
|
||
|
|
diffs[diffsLength++] = [DIFF_INSERT, decodeURI(param)];
|
||
|
|
} catch (ex) {
|
||
|
|
// Malformed URI sequence.
|
||
|
|
throw new Error('Illegal escape in diff_fromDelta: ' + param);
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
case '-':
|
||
|
|
// Fall through.
|
||
|
|
case '=':
|
||
|
|
var n = parseInt(param, 10);
|
||
|
|
if (isNaN(n) || n < 0) {
|
||
|
|
throw new Error('Invalid number in diff_fromDelta: ' + param);
|
||
|
|
}
|
||
|
|
var text = text1.substring(pointer, pointer += n);
|
||
|
|
if (tokens[x].charAt(0) == '=') {
|
||
|
|
diffs[diffsLength++] = [DIFF_EQUAL, text];
|
||
|
|
} else {
|
||
|
|
diffs[diffsLength++] = [DIFF_DELETE, text];
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
default:
|
||
|
|
// Blank tokens are ok (from a trailing \t).
|
||
|
|
// Anything else is an error.
|
||
|
|
if (tokens[x]) {
|
||
|
|
throw new Error('Invalid diff operation in diff_fromDelta: ' +
|
||
|
|
tokens[x]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (pointer != text1.length) {
|
||
|
|
throw new Error('Delta length (' + pointer +
|
||
|
|
') does not equal source text length (' + text1.length + ').');
|
||
|
|
}
|
||
|
|
return diffs;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
// MATCH FUNCTIONS
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Locate the best instance of 'pattern' in 'text' near 'loc'.
|
||
|
|
* @param {string} text The text to search.
|
||
|
|
* @param {string} pattern The pattern to search for.
|
||
|
|
* @param {number} loc The location to search around.
|
||
|
|
* @return {number} Best match index or -1.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.match_main = function(text, pattern, loc) {
|
||
|
|
// Check for null inputs.
|
||
|
|
if (text == null || pattern == null || loc == null) {
|
||
|
|
throw new Error('Null input. (match_main)');
|
||
|
|
}
|
||
|
|
|
||
|
|
loc = Math.max(0, Math.min(loc, text.length));
|
||
|
|
if (text == pattern) {
|
||
|
|
// Shortcut (potentially not guaranteed by the algorithm)
|
||
|
|
return 0;
|
||
|
|
} else if (!text.length) {
|
||
|
|
// Nothing to match.
|
||
|
|
return -1;
|
||
|
|
} else if (text.substring(loc, loc + pattern.length) == pattern) {
|
||
|
|
// Perfect match at the perfect spot! (Includes case of null pattern)
|
||
|
|
return loc;
|
||
|
|
} else {
|
||
|
|
// Do a fuzzy compare.
|
||
|
|
return this.match_bitap_(text, pattern, loc);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Locate the best instance of 'pattern' in 'text' near 'loc' using the
|
||
|
|
* Bitap algorithm.
|
||
|
|
* @param {string} text The text to search.
|
||
|
|
* @param {string} pattern The pattern to search for.
|
||
|
|
* @param {number} loc The location to search around.
|
||
|
|
* @return {number} Best match index or -1.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.match_bitap_ = function(text, pattern, loc) {
|
||
|
|
if (pattern.length > this.Match_MaxBits) {
|
||
|
|
throw new Error('Pattern too long for this browser.');
|
||
|
|
}
|
||
|
|
|
||
|
|
// Initialise the alphabet.
|
||
|
|
var s = this.match_alphabet_(pattern);
|
||
|
|
|
||
|
|
var dmp = this; // 'this' becomes 'window' in a closure.
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compute and return the score for a match with e errors and x location.
|
||
|
|
* Accesses loc and pattern through being a closure.
|
||
|
|
* @param {number} e Number of errors in match.
|
||
|
|
* @param {number} x Location of match.
|
||
|
|
* @return {number} Overall score for match (0.0 = good, 1.0 = bad).
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
function match_bitapScore_(e, x) {
|
||
|
|
var accuracy = e / pattern.length;
|
||
|
|
var proximity = Math.abs(loc - x);
|
||
|
|
if (!dmp.Match_Distance) {
|
||
|
|
// Dodge divide by zero error.
|
||
|
|
return proximity ? 1.0 : accuracy;
|
||
|
|
}
|
||
|
|
return accuracy + (proximity / dmp.Match_Distance);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Highest score beyond which we give up.
|
||
|
|
var score_threshold = this.Match_Threshold;
|
||
|
|
// Is there a nearby exact match? (speedup)
|
||
|
|
var best_loc = text.indexOf(pattern, loc);
|
||
|
|
if (best_loc != -1) {
|
||
|
|
score_threshold = Math.min(match_bitapScore_(0, best_loc), score_threshold);
|
||
|
|
// What about in the other direction? (speedup)
|
||
|
|
best_loc = text.lastIndexOf(pattern, loc + pattern.length);
|
||
|
|
if (best_loc != -1) {
|
||
|
|
score_threshold =
|
||
|
|
Math.min(match_bitapScore_(0, best_loc), score_threshold);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// Initialise the bit arrays.
|
||
|
|
var matchmask = 1 << (pattern.length - 1);
|
||
|
|
best_loc = -1;
|
||
|
|
|
||
|
|
var bin_min, bin_mid;
|
||
|
|
var bin_max = pattern.length + text.length;
|
||
|
|
var last_rd;
|
||
|
|
for (var d = 0; d < pattern.length; d++) {
|
||
|
|
// Scan for the best match; each iteration allows for one more error.
|
||
|
|
// Run a binary search to determine how far from 'loc' we can stray at this
|
||
|
|
// error level.
|
||
|
|
bin_min = 0;
|
||
|
|
bin_mid = bin_max;
|
||
|
|
while (bin_min < bin_mid) {
|
||
|
|
if (match_bitapScore_(d, loc + bin_mid) <= score_threshold) {
|
||
|
|
bin_min = bin_mid;
|
||
|
|
} else {
|
||
|
|
bin_max = bin_mid;
|
||
|
|
}
|
||
|
|
bin_mid = Math.floor((bin_max - bin_min) / 2 + bin_min);
|
||
|
|
}
|
||
|
|
// Use the result from this iteration as the maximum for the next.
|
||
|
|
bin_max = bin_mid;
|
||
|
|
var start = Math.max(1, loc - bin_mid + 1);
|
||
|
|
var finish = Math.min(loc + bin_mid, text.length) + pattern.length;
|
||
|
|
|
||
|
|
var rd = Array(finish + 2);
|
||
|
|
rd[finish + 1] = (1 << d) - 1;
|
||
|
|
for (var j = finish; j >= start; j--) {
|
||
|
|
// The alphabet (s) is a sparse hash, so the following line generates
|
||
|
|
// warnings.
|
||
|
|
var charMatch = s[text.charAt(j - 1)];
|
||
|
|
if (d === 0) { // First pass: exact match.
|
||
|
|
rd[j] = ((rd[j + 1] << 1) | 1) & charMatch;
|
||
|
|
} else { // Subsequent passes: fuzzy match.
|
||
|
|
rd[j] = ((rd[j + 1] << 1) | 1) & charMatch |
|
||
|
|
(((last_rd[j + 1] | last_rd[j]) << 1) | 1) |
|
||
|
|
last_rd[j + 1];
|
||
|
|
}
|
||
|
|
if (rd[j] & matchmask) {
|
||
|
|
var score = match_bitapScore_(d, j - 1);
|
||
|
|
// This match will almost certainly be better than any existing match.
|
||
|
|
// But check anyway.
|
||
|
|
if (score <= score_threshold) {
|
||
|
|
// Told you so.
|
||
|
|
score_threshold = score;
|
||
|
|
best_loc = j - 1;
|
||
|
|
if (best_loc > loc) {
|
||
|
|
// When passing loc, don't exceed our current distance from loc.
|
||
|
|
start = Math.max(1, 2 * loc - best_loc);
|
||
|
|
} else {
|
||
|
|
// Already passed loc, downhill from here on in.
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// No hope for a (better) match at greater error levels.
|
||
|
|
if (match_bitapScore_(d + 1, loc) > score_threshold) {
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
last_rd = rd;
|
||
|
|
}
|
||
|
|
return best_loc;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Initialise the alphabet for the Bitap algorithm.
|
||
|
|
* @param {string} pattern The text to encode.
|
||
|
|
* @return {!Object} Hash of character locations.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.match_alphabet_ = function(pattern) {
|
||
|
|
var s = {};
|
||
|
|
for (var i = 0; i < pattern.length; i++) {
|
||
|
|
s[pattern.charAt(i)] = 0;
|
||
|
|
}
|
||
|
|
for (var i = 0; i < pattern.length; i++) {
|
||
|
|
s[pattern.charAt(i)] |= 1 << (pattern.length - i - 1);
|
||
|
|
}
|
||
|
|
return s;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
// PATCH FUNCTIONS
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Increase the context until it is unique,
|
||
|
|
* but don't let the pattern expand beyond Match_MaxBits.
|
||
|
|
* @param {!diff_match_patch.patch_obj} patch The patch to grow.
|
||
|
|
* @param {string} text Source text.
|
||
|
|
* @private
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.patch_addContext_ = function(patch, text) {
|
||
|
|
if (text.length == 0) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var pattern = text.substring(patch.start2, patch.start2 + patch.length1);
|
||
|
|
var padding = 0;
|
||
|
|
|
||
|
|
// Look for the first and last matches of pattern in text. If two different
|
||
|
|
// matches are found, increase the pattern length.
|
||
|
|
while (text.indexOf(pattern) != text.lastIndexOf(pattern) &&
|
||
|
|
pattern.length < this.Match_MaxBits - this.Patch_Margin -
|
||
|
|
this.Patch_Margin) {
|
||
|
|
padding += this.Patch_Margin;
|
||
|
|
pattern = text.substring(patch.start2 - padding,
|
||
|
|
patch.start2 + patch.length1 + padding);
|
||
|
|
}
|
||
|
|
// Add one chunk for good luck.
|
||
|
|
padding += this.Patch_Margin;
|
||
|
|
|
||
|
|
// Add the prefix.
|
||
|
|
var prefix = text.substring(patch.start2 - padding, patch.start2);
|
||
|
|
if (prefix) {
|
||
|
|
patch.diffs.unshift([DIFF_EQUAL, prefix]);
|
||
|
|
}
|
||
|
|
// Add the suffix.
|
||
|
|
var suffix = text.substring(patch.start2 + patch.length1,
|
||
|
|
patch.start2 + patch.length1 + padding);
|
||
|
|
if (suffix) {
|
||
|
|
patch.diffs.push([DIFF_EQUAL, suffix]);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Roll back the start points.
|
||
|
|
patch.start1 -= prefix.length;
|
||
|
|
patch.start2 -= prefix.length;
|
||
|
|
// Extend the lengths.
|
||
|
|
patch.length1 += prefix.length + suffix.length;
|
||
|
|
patch.length2 += prefix.length + suffix.length;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Compute a list of patches to turn text1 into text2.
|
||
|
|
* Use diffs if provided, otherwise compute it ourselves.
|
||
|
|
* There are four ways to call this function, depending on what data is
|
||
|
|
* available to the caller:
|
||
|
|
* Method 1:
|
||
|
|
* a = text1, b = text2
|
||
|
|
* Method 2:
|
||
|
|
* a = diffs
|
||
|
|
* Method 3 (optimal):
|
||
|
|
* a = text1, b = diffs
|
||
|
|
* Method 4 (deprecated, use method 3):
|
||
|
|
* a = text1, b = text2, c = diffs
|
||
|
|
*
|
||
|
|
* @param {string|!Array.<!diff_match_patch.Diff>} a text1 (methods 1,3,4) or
|
||
|
|
* Array of diff tuples for text1 to text2 (method 2).
|
||
|
|
* @param {string|!Array.<!diff_match_patch.Diff>} opt_b text2 (methods 1,4) or
|
||
|
|
* Array of diff tuples for text1 to text2 (method 3) or undefined (method 2).
|
||
|
|
* @param {string|!Array.<!diff_match_patch.Diff>} opt_c Array of diff tuples
|
||
|
|
* for text1 to text2 (method 4) or undefined (methods 1,2,3).
|
||
|
|
* @return {!Array.<!diff_match_patch.patch_obj>} Array of patch objects.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.patch_make = function(a, opt_b, opt_c) {
|
||
|
|
var text1, diffs;
|
||
|
|
if (typeof a == 'string' && typeof opt_b == 'string' &&
|
||
|
|
typeof opt_c == 'undefined') {
|
||
|
|
// Method 1: text1, text2
|
||
|
|
// Compute diffs from text1 and text2.
|
||
|
|
text1 = /** @type {string} */(a);
|
||
|
|
diffs = this.diff_main(text1, /** @type {string} */(opt_b), true);
|
||
|
|
if (diffs.length > 2) {
|
||
|
|
this.diff_cleanupSemantic(diffs);
|
||
|
|
this.diff_cleanupEfficiency(diffs);
|
||
|
|
}
|
||
|
|
} else if (a && typeof a == 'object' && typeof opt_b == 'undefined' &&
|
||
|
|
typeof opt_c == 'undefined') {
|
||
|
|
// Method 2: diffs
|
||
|
|
// Compute text1 from diffs.
|
||
|
|
diffs = /** @type {!Array.<!diff_match_patch.Diff>} */(a);
|
||
|
|
text1 = this.diff_text1(diffs);
|
||
|
|
} else if (typeof a == 'string' && opt_b && typeof opt_b == 'object' &&
|
||
|
|
typeof opt_c == 'undefined') {
|
||
|
|
// Method 3: text1, diffs
|
||
|
|
text1 = /** @type {string} */(a);
|
||
|
|
diffs = /** @type {!Array.<!diff_match_patch.Diff>} */(opt_b);
|
||
|
|
} else if (typeof a == 'string' && typeof opt_b == 'string' &&
|
||
|
|
opt_c && typeof opt_c == 'object') {
|
||
|
|
// Method 4: text1, text2, diffs
|
||
|
|
// text2 is not used.
|
||
|
|
text1 = /** @type {string} */(a);
|
||
|
|
diffs = /** @type {!Array.<!diff_match_patch.Diff>} */(opt_c);
|
||
|
|
} else {
|
||
|
|
throw new Error('Unknown call format to patch_make.');
|
||
|
|
}
|
||
|
|
|
||
|
|
if (diffs.length === 0) {
|
||
|
|
return []; // Get rid of the null case.
|
||
|
|
}
|
||
|
|
var patches = [];
|
||
|
|
var patch = new diff_match_patch.patch_obj();
|
||
|
|
var patchDiffLength = 0; // Keeping our own length var is faster in JS.
|
||
|
|
var char_count1 = 0; // Number of characters into the text1 string.
|
||
|
|
var char_count2 = 0; // Number of characters into the text2 string.
|
||
|
|
// Start with text1 (prepatch_text) and apply the diffs until we arrive at
|
||
|
|
// text2 (postpatch_text). We recreate the patches one by one to determine
|
||
|
|
// context info.
|
||
|
|
var prepatch_text = text1;
|
||
|
|
var postpatch_text = text1;
|
||
|
|
for (var x = 0; x < diffs.length; x++) {
|
||
|
|
var diff_type = diffs[x][0];
|
||
|
|
var diff_text = diffs[x][1];
|
||
|
|
|
||
|
|
if (!patchDiffLength && diff_type !== DIFF_EQUAL) {
|
||
|
|
// A new patch starts here.
|
||
|
|
patch.start1 = char_count1;
|
||
|
|
patch.start2 = char_count2;
|
||
|
|
}
|
||
|
|
|
||
|
|
switch (diff_type) {
|
||
|
|
case DIFF_INSERT:
|
||
|
|
patch.diffs[patchDiffLength++] = diffs[x];
|
||
|
|
patch.length2 += diff_text.length;
|
||
|
|
postpatch_text = postpatch_text.substring(0, char_count2) + diff_text +
|
||
|
|
postpatch_text.substring(char_count2);
|
||
|
|
break;
|
||
|
|
case DIFF_DELETE:
|
||
|
|
patch.length1 += diff_text.length;
|
||
|
|
patch.diffs[patchDiffLength++] = diffs[x];
|
||
|
|
postpatch_text = postpatch_text.substring(0, char_count2) +
|
||
|
|
postpatch_text.substring(char_count2 +
|
||
|
|
diff_text.length);
|
||
|
|
break;
|
||
|
|
case DIFF_EQUAL:
|
||
|
|
if (diff_text.length <= 2 * this.Patch_Margin &&
|
||
|
|
patchDiffLength && diffs.length != x + 1) {
|
||
|
|
// Small equality inside a patch.
|
||
|
|
patch.diffs[patchDiffLength++] = diffs[x];
|
||
|
|
patch.length1 += diff_text.length;
|
||
|
|
patch.length2 += diff_text.length;
|
||
|
|
} else if (diff_text.length >= 2 * this.Patch_Margin) {
|
||
|
|
// Time for a new patch.
|
||
|
|
if (patchDiffLength) {
|
||
|
|
this.patch_addContext_(patch, prepatch_text);
|
||
|
|
patches.push(patch);
|
||
|
|
patch = new diff_match_patch.patch_obj();
|
||
|
|
patchDiffLength = 0;
|
||
|
|
// Unlike Unidiff, our patch lists have a rolling context.
|
||
|
|
// http://code.google.com/p/google-diff-match-patch/wiki/Unidiff
|
||
|
|
// Update prepatch text & pos to reflect the application of the
|
||
|
|
// just completed patch.
|
||
|
|
prepatch_text = postpatch_text;
|
||
|
|
char_count1 = char_count2;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Update the current character count.
|
||
|
|
if (diff_type !== DIFF_INSERT) {
|
||
|
|
char_count1 += diff_text.length;
|
||
|
|
}
|
||
|
|
if (diff_type !== DIFF_DELETE) {
|
||
|
|
char_count2 += diff_text.length;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Pick up the leftover patch if not empty.
|
||
|
|
if (patchDiffLength) {
|
||
|
|
this.patch_addContext_(patch, prepatch_text);
|
||
|
|
patches.push(patch);
|
||
|
|
}
|
||
|
|
|
||
|
|
return patches;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Given an array of patches, return another array that is identical.
|
||
|
|
* @param {!Array.<!diff_match_patch.patch_obj>} patches Array of patch objects.
|
||
|
|
* @return {!Array.<!diff_match_patch.patch_obj>} Array of patch objects.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.patch_deepCopy = function(patches) {
|
||
|
|
// Making deep copies is hard in JavaScript.
|
||
|
|
var patchesCopy = [];
|
||
|
|
for (var x = 0; x < patches.length; x++) {
|
||
|
|
var patch = patches[x];
|
||
|
|
var patchCopy = new diff_match_patch.patch_obj();
|
||
|
|
patchCopy.diffs = [];
|
||
|
|
for (var y = 0; y < patch.diffs.length; y++) {
|
||
|
|
patchCopy.diffs[y] = patch.diffs[y].slice();
|
||
|
|
}
|
||
|
|
patchCopy.start1 = patch.start1;
|
||
|
|
patchCopy.start2 = patch.start2;
|
||
|
|
patchCopy.length1 = patch.length1;
|
||
|
|
patchCopy.length2 = patch.length2;
|
||
|
|
patchesCopy[x] = patchCopy;
|
||
|
|
}
|
||
|
|
return patchesCopy;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Merge a set of patches onto the text. Return a patched text, as well
|
||
|
|
* as a list of true/false values indicating which patches were applied.
|
||
|
|
* @param {!Array.<!diff_match_patch.patch_obj>} patches Array of patch objects.
|
||
|
|
* @param {string} text Old text.
|
||
|
|
* @return {!Array.<string|!Array.<boolean>>} Two element Array, containing the
|
||
|
|
* new text and an array of boolean values.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.patch_apply = function(patches, text) {
|
||
|
|
if (patches.length == 0) {
|
||
|
|
return [text, []];
|
||
|
|
}
|
||
|
|
|
||
|
|
// Deep copy the patches so that no changes are made to originals.
|
||
|
|
patches = this.patch_deepCopy(patches);
|
||
|
|
|
||
|
|
var nullPadding = this.patch_addPadding(patches);
|
||
|
|
text = nullPadding + text + nullPadding;
|
||
|
|
|
||
|
|
this.patch_splitMax(patches);
|
||
|
|
// delta keeps track of the offset between the expected and actual location
|
||
|
|
// of the previous patch. If there are patches expected at positions 10 and
|
||
|
|
// 20, but the first patch was found at 12, delta is 2 and the second patch
|
||
|
|
// has an effective expected position of 22.
|
||
|
|
var delta = 0;
|
||
|
|
var results = [];
|
||
|
|
for (var x = 0; x < patches.length; x++) {
|
||
|
|
var expected_loc = patches[x].start2 + delta;
|
||
|
|
var text1 = this.diff_text1(patches[x].diffs);
|
||
|
|
var start_loc;
|
||
|
|
var end_loc = -1;
|
||
|
|
if (text1.length > this.Match_MaxBits) {
|
||
|
|
// patch_splitMax will only provide an oversized pattern in the case of
|
||
|
|
// a monster delete.
|
||
|
|
start_loc = this.match_main(text, text1.substring(0, this.Match_MaxBits),
|
||
|
|
expected_loc);
|
||
|
|
if (start_loc != -1) {
|
||
|
|
end_loc = this.match_main(text,
|
||
|
|
text1.substring(text1.length - this.Match_MaxBits),
|
||
|
|
expected_loc + text1.length - this.Match_MaxBits);
|
||
|
|
if (end_loc == -1 || start_loc >= end_loc) {
|
||
|
|
// Can't find valid trailing context. Drop this patch.
|
||
|
|
start_loc = -1;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
start_loc = this.match_main(text, text1, expected_loc);
|
||
|
|
}
|
||
|
|
if (start_loc == -1) {
|
||
|
|
// No match found. :(
|
||
|
|
results[x] = false;
|
||
|
|
// Subtract the delta for this failed patch from subsequent patches.
|
||
|
|
delta -= patches[x].length2 - patches[x].length1;
|
||
|
|
} else {
|
||
|
|
// Found a match. :)
|
||
|
|
results[x] = true;
|
||
|
|
delta = start_loc - expected_loc;
|
||
|
|
var text2;
|
||
|
|
if (end_loc == -1) {
|
||
|
|
text2 = text.substring(start_loc, start_loc + text1.length);
|
||
|
|
} else {
|
||
|
|
text2 = text.substring(start_loc, end_loc + this.Match_MaxBits);
|
||
|
|
}
|
||
|
|
if (text1 == text2) {
|
||
|
|
// Perfect match, just shove the replacement text in.
|
||
|
|
text = text.substring(0, start_loc) +
|
||
|
|
this.diff_text2(patches[x].diffs) +
|
||
|
|
text.substring(start_loc + text1.length);
|
||
|
|
} else {
|
||
|
|
// Imperfect match. Run a diff to get a framework of equivalent
|
||
|
|
// indices.
|
||
|
|
var diffs = this.diff_main(text1, text2, false);
|
||
|
|
if (text1.length > this.Match_MaxBits &&
|
||
|
|
this.diff_levenshtein(diffs) / text1.length >
|
||
|
|
this.Patch_DeleteThreshold) {
|
||
|
|
// The end points match, but the content is unacceptably bad.
|
||
|
|
results[x] = false;
|
||
|
|
} else {
|
||
|
|
this.diff_cleanupSemanticLossless(diffs);
|
||
|
|
var index1 = 0;
|
||
|
|
var index2;
|
||
|
|
for (var y = 0; y < patches[x].diffs.length; y++) {
|
||
|
|
var mod = patches[x].diffs[y];
|
||
|
|
if (mod[0] !== DIFF_EQUAL) {
|
||
|
|
index2 = this.diff_xIndex(diffs, index1);
|
||
|
|
}
|
||
|
|
if (mod[0] === DIFF_INSERT) { // Insertion
|
||
|
|
text = text.substring(0, start_loc + index2) + mod[1] +
|
||
|
|
text.substring(start_loc + index2);
|
||
|
|
} else if (mod[0] === DIFF_DELETE) { // Deletion
|
||
|
|
text = text.substring(0, start_loc + index2) +
|
||
|
|
text.substring(start_loc + this.diff_xIndex(diffs,
|
||
|
|
index1 + mod[1].length));
|
||
|
|
}
|
||
|
|
if (mod[0] !== DIFF_DELETE) {
|
||
|
|
index1 += mod[1].length;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Strip the padding off.
|
||
|
|
text = text.substring(nullPadding.length, text.length - nullPadding.length);
|
||
|
|
return [text, results];
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Add some padding on text start and end so that edges can match something.
|
||
|
|
* Intended to be called only from within patch_apply.
|
||
|
|
* @param {!Array.<!diff_match_patch.patch_obj>} patches Array of patch objects.
|
||
|
|
* @return {string} The padding string added to each side.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.patch_addPadding = function(patches) {
|
||
|
|
var paddingLength = this.Patch_Margin;
|
||
|
|
var nullPadding = '';
|
||
|
|
for (var x = 1; x <= paddingLength; x++) {
|
||
|
|
nullPadding += String.fromCharCode(x);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Bump all the patches forward.
|
||
|
|
for (var x = 0; x < patches.length; x++) {
|
||
|
|
patches[x].start1 += paddingLength;
|
||
|
|
patches[x].start2 += paddingLength;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Add some padding on start of first diff.
|
||
|
|
var patch = patches[0];
|
||
|
|
var diffs = patch.diffs;
|
||
|
|
if (diffs.length == 0 || diffs[0][0] != DIFF_EQUAL) {
|
||
|
|
// Add nullPadding equality.
|
||
|
|
diffs.unshift([DIFF_EQUAL, nullPadding]);
|
||
|
|
patch.start1 -= paddingLength; // Should be 0.
|
||
|
|
patch.start2 -= paddingLength; // Should be 0.
|
||
|
|
patch.length1 += paddingLength;
|
||
|
|
patch.length2 += paddingLength;
|
||
|
|
} else if (paddingLength > diffs[0][1].length) {
|
||
|
|
// Grow first equality.
|
||
|
|
var extraLength = paddingLength - diffs[0][1].length;
|
||
|
|
diffs[0][1] = nullPadding.substring(diffs[0][1].length) + diffs[0][1];
|
||
|
|
patch.start1 -= extraLength;
|
||
|
|
patch.start2 -= extraLength;
|
||
|
|
patch.length1 += extraLength;
|
||
|
|
patch.length2 += extraLength;
|
||
|
|
}
|
||
|
|
|
||
|
|
// Add some padding on end of last diff.
|
||
|
|
patch = patches[patches.length - 1];
|
||
|
|
diffs = patch.diffs;
|
||
|
|
if (diffs.length == 0 || diffs[diffs.length - 1][0] != DIFF_EQUAL) {
|
||
|
|
// Add nullPadding equality.
|
||
|
|
diffs.push([DIFF_EQUAL, nullPadding]);
|
||
|
|
patch.length1 += paddingLength;
|
||
|
|
patch.length2 += paddingLength;
|
||
|
|
} else if (paddingLength > diffs[diffs.length - 1][1].length) {
|
||
|
|
// Grow last equality.
|
||
|
|
var extraLength = paddingLength - diffs[diffs.length - 1][1].length;
|
||
|
|
diffs[diffs.length - 1][1] += nullPadding.substring(0, extraLength);
|
||
|
|
patch.length1 += extraLength;
|
||
|
|
patch.length2 += extraLength;
|
||
|
|
}
|
||
|
|
|
||
|
|
return nullPadding;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Look through the patches and break up any which are longer than the maximum
|
||
|
|
* limit of the match algorithm.
|
||
|
|
* Intended to be called only from within patch_apply.
|
||
|
|
* @param {!Array.<!diff_match_patch.patch_obj>} patches Array of patch objects.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.patch_splitMax = function(patches) {
|
||
|
|
var patch_size = this.Match_MaxBits;
|
||
|
|
for (var x = 0; x < patches.length; x++) {
|
||
|
|
if (patches[x].length1 > patch_size) {
|
||
|
|
var bigpatch = patches[x];
|
||
|
|
// Remove the big old patch.
|
||
|
|
patches.splice(x--, 1);
|
||
|
|
var start1 = bigpatch.start1;
|
||
|
|
var start2 = bigpatch.start2;
|
||
|
|
var precontext = '';
|
||
|
|
while (bigpatch.diffs.length !== 0) {
|
||
|
|
// Create one of several smaller patches.
|
||
|
|
var patch = new diff_match_patch.patch_obj();
|
||
|
|
var empty = true;
|
||
|
|
patch.start1 = start1 - precontext.length;
|
||
|
|
patch.start2 = start2 - precontext.length;
|
||
|
|
if (precontext !== '') {
|
||
|
|
patch.length1 = patch.length2 = precontext.length;
|
||
|
|
patch.diffs.push([DIFF_EQUAL, precontext]);
|
||
|
|
}
|
||
|
|
while (bigpatch.diffs.length !== 0 &&
|
||
|
|
patch.length1 < patch_size - this.Patch_Margin) {
|
||
|
|
var diff_type = bigpatch.diffs[0][0];
|
||
|
|
var diff_text = bigpatch.diffs[0][1];
|
||
|
|
if (diff_type === DIFF_INSERT) {
|
||
|
|
// Insertions are harmless.
|
||
|
|
patch.length2 += diff_text.length;
|
||
|
|
start2 += diff_text.length;
|
||
|
|
patch.diffs.push(bigpatch.diffs.shift());
|
||
|
|
empty = false;
|
||
|
|
} else if (diff_type === DIFF_DELETE && patch.diffs.length == 1 &&
|
||
|
|
patch.diffs[0][0] == DIFF_EQUAL &&
|
||
|
|
diff_text.length > 2 * patch_size) {
|
||
|
|
// This is a large deletion. Let it pass in one chunk.
|
||
|
|
patch.length1 += diff_text.length;
|
||
|
|
start1 += diff_text.length;
|
||
|
|
empty = false;
|
||
|
|
patch.diffs.push([diff_type, diff_text]);
|
||
|
|
bigpatch.diffs.shift();
|
||
|
|
} else {
|
||
|
|
// Deletion or equality. Only take as much as we can stomach.
|
||
|
|
diff_text = diff_text.substring(0,
|
||
|
|
patch_size - patch.length1 - this.Patch_Margin);
|
||
|
|
patch.length1 += diff_text.length;
|
||
|
|
start1 += diff_text.length;
|
||
|
|
if (diff_type === DIFF_EQUAL) {
|
||
|
|
patch.length2 += diff_text.length;
|
||
|
|
start2 += diff_text.length;
|
||
|
|
} else {
|
||
|
|
empty = false;
|
||
|
|
}
|
||
|
|
patch.diffs.push([diff_type, diff_text]);
|
||
|
|
if (diff_text == bigpatch.diffs[0][1]) {
|
||
|
|
bigpatch.diffs.shift();
|
||
|
|
} else {
|
||
|
|
bigpatch.diffs[0][1] =
|
||
|
|
bigpatch.diffs[0][1].substring(diff_text.length);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
// Compute the head context for the next patch.
|
||
|
|
precontext = this.diff_text2(patch.diffs);
|
||
|
|
precontext =
|
||
|
|
precontext.substring(precontext.length - this.Patch_Margin);
|
||
|
|
// Append the end context for this patch.
|
||
|
|
var postcontext = this.diff_text1(bigpatch.diffs)
|
||
|
|
.substring(0, this.Patch_Margin);
|
||
|
|
if (postcontext !== '') {
|
||
|
|
patch.length1 += postcontext.length;
|
||
|
|
patch.length2 += postcontext.length;
|
||
|
|
if (patch.diffs.length !== 0 &&
|
||
|
|
patch.diffs[patch.diffs.length - 1][0] === DIFF_EQUAL) {
|
||
|
|
patch.diffs[patch.diffs.length - 1][1] += postcontext;
|
||
|
|
} else {
|
||
|
|
patch.diffs.push([DIFF_EQUAL, postcontext]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!empty) {
|
||
|
|
patches.splice(++x, 0, patch);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Take a list of patches and return a textual representation.
|
||
|
|
* @param {!Array.<!diff_match_patch.patch_obj>} patches Array of patch objects.
|
||
|
|
* @return {string} Text representation of patches.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.patch_toText = function(patches) {
|
||
|
|
var text = [];
|
||
|
|
for (var x = 0; x < patches.length; x++) {
|
||
|
|
text[x] = patches[x];
|
||
|
|
}
|
||
|
|
return text.join('');
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Parse a textual representation of patches and return a list of patch objects.
|
||
|
|
* @param {string} textline Text representation of patches.
|
||
|
|
* @return {!Array.<!diff_match_patch.patch_obj>} Array of patch objects.
|
||
|
|
* @throws {!Error} If invalid input.
|
||
|
|
*/
|
||
|
|
diff_match_patch.prototype.patch_fromText = function(textline) {
|
||
|
|
var patches = [];
|
||
|
|
if (!textline) {
|
||
|
|
return patches;
|
||
|
|
}
|
||
|
|
var text = textline.split('\n');
|
||
|
|
var textPointer = 0;
|
||
|
|
var patchHeader = /^@@ -(\d+),?(\d*) \+(\d+),?(\d*) @@$/;
|
||
|
|
while (textPointer < text.length) {
|
||
|
|
var m = text[textPointer].match(patchHeader);
|
||
|
|
if (!m) {
|
||
|
|
throw new Error('Invalid patch string: ' + text[textPointer]);
|
||
|
|
}
|
||
|
|
var patch = new diff_match_patch.patch_obj();
|
||
|
|
patches.push(patch);
|
||
|
|
patch.start1 = parseInt(m[1], 10);
|
||
|
|
if (m[2] === '') {
|
||
|
|
patch.start1--;
|
||
|
|
patch.length1 = 1;
|
||
|
|
} else if (m[2] == '0') {
|
||
|
|
patch.length1 = 0;
|
||
|
|
} else {
|
||
|
|
patch.start1--;
|
||
|
|
patch.length1 = parseInt(m[2], 10);
|
||
|
|
}
|
||
|
|
|
||
|
|
patch.start2 = parseInt(m[3], 10);
|
||
|
|
if (m[4] === '') {
|
||
|
|
patch.start2--;
|
||
|
|
patch.length2 = 1;
|
||
|
|
} else if (m[4] == '0') {
|
||
|
|
patch.length2 = 0;
|
||
|
|
} else {
|
||
|
|
patch.start2--;
|
||
|
|
patch.length2 = parseInt(m[4], 10);
|
||
|
|
}
|
||
|
|
textPointer++;
|
||
|
|
|
||
|
|
while (textPointer < text.length) {
|
||
|
|
var sign = text[textPointer].charAt(0);
|
||
|
|
try {
|
||
|
|
var line = decodeURI(text[textPointer].substring(1));
|
||
|
|
} catch (ex) {
|
||
|
|
// Malformed URI sequence.
|
||
|
|
throw new Error('Illegal escape in patch_fromText: ' + line);
|
||
|
|
}
|
||
|
|
if (sign == '-') {
|
||
|
|
// Deletion.
|
||
|
|
patch.diffs.push([DIFF_DELETE, line]);
|
||
|
|
} else if (sign == '+') {
|
||
|
|
// Insertion.
|
||
|
|
patch.diffs.push([DIFF_INSERT, line]);
|
||
|
|
} else if (sign == ' ') {
|
||
|
|
// Minor equality.
|
||
|
|
patch.diffs.push([DIFF_EQUAL, line]);
|
||
|
|
} else if (sign == '@') {
|
||
|
|
// Start of next patch.
|
||
|
|
break;
|
||
|
|
} else if (sign === '') {
|
||
|
|
// Blank line? Whatever.
|
||
|
|
} else {
|
||
|
|
// WTF?
|
||
|
|
throw new Error('Invalid patch mode "' + sign + '" in: ' + line);
|
||
|
|
}
|
||
|
|
textPointer++;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return patches;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Class representing one patch operation.
|
||
|
|
* @constructor
|
||
|
|
*/
|
||
|
|
diff_match_patch.patch_obj = function() {
|
||
|
|
/** @type {!Array.<!diff_match_patch.Diff>} */
|
||
|
|
this.diffs = [];
|
||
|
|
/** @type {?number} */
|
||
|
|
this.start1 = null;
|
||
|
|
/** @type {?number} */
|
||
|
|
this.start2 = null;
|
||
|
|
/** @type {number} */
|
||
|
|
this.length1 = 0;
|
||
|
|
/** @type {number} */
|
||
|
|
this.length2 = 0;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Emmulate GNU diff's format.
|
||
|
|
* Header: @@ -382,8 +481,9 @@
|
||
|
|
* Indicies are printed as 1-based, not 0-based.
|
||
|
|
* @return {string} The GNU diff string.
|
||
|
|
*/
|
||
|
|
diff_match_patch.patch_obj.prototype.toString = function() {
|
||
|
|
var coords1, coords2;
|
||
|
|
if (this.length1 === 0) {
|
||
|
|
coords1 = this.start1 + ',0';
|
||
|
|
} else if (this.length1 == 1) {
|
||
|
|
coords1 = this.start1 + 1;
|
||
|
|
} else {
|
||
|
|
coords1 = (this.start1 + 1) + ',' + this.length1;
|
||
|
|
}
|
||
|
|
if (this.length2 === 0) {
|
||
|
|
coords2 = this.start2 + ',0';
|
||
|
|
} else if (this.length2 == 1) {
|
||
|
|
coords2 = this.start2 + 1;
|
||
|
|
} else {
|
||
|
|
coords2 = (this.start2 + 1) + ',' + this.length2;
|
||
|
|
}
|
||
|
|
var text = ['@@ -' + coords1 + ' +' + coords2 + ' @@\n'];
|
||
|
|
var op;
|
||
|
|
// Escape the body of the patch with %xx notation.
|
||
|
|
for (var x = 0; x < this.diffs.length; x++) {
|
||
|
|
switch (this.diffs[x][0]) {
|
||
|
|
case DIFF_INSERT:
|
||
|
|
op = '+';
|
||
|
|
break;
|
||
|
|
case DIFF_DELETE:
|
||
|
|
op = '-';
|
||
|
|
break;
|
||
|
|
case DIFF_EQUAL:
|
||
|
|
op = ' ';
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
text[x + 1] = op + encodeURI(this.diffs[x][1]) + '\n';
|
||
|
|
}
|
||
|
|
return text.join('').replace(/%20/g, ' ');
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
// Export these global variables so that they survive Google's JS compiler.
|
||
|
|
// In a browser, 'this' will be 'window'.
|
||
|
|
// In node.js 'this' will be a global object.
|
||
|
|
this['diff_match_patch'] = diff_match_patch;
|
||
|
|
this['DIFF_DELETE'] = DIFF_DELETE;
|
||
|
|
this['DIFF_INSERT'] = DIFF_INSERT;
|
||
|
|
this['DIFF_EQUAL'] = DIFF_EQUAL;
|
||
|
|
|
||
|
|
|
||
|
|
},{}],3:[function(require,module,exports){
|
||
|
|
|
||
|
|
var isArray = (typeof Array.isArray === 'function') ?
|
||
|
|
// use native function
|
||
|
|
Array.isArray :
|
||
|
|
// use instanceof operator
|
||
|
|
function(a) {
|
||
|
|
return a instanceof Array;
|
||
|
|
};
|
||
|
|
|
||
|
|
function cloneRegExp(re) {
|
||
|
|
var regexMatch = /^\/(.*)\/([gimyu]*)$/.exec(re.toString());
|
||
|
|
return new RegExp(regexMatch[1], regexMatch[2]);
|
||
|
|
}
|
||
|
|
|
||
|
|
function clone(arg) {
|
||
|
|
if (typeof arg !== 'object') {
|
||
|
|
return arg;
|
||
|
|
}
|
||
|
|
if (arg === null) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
if (isArray(arg)) {
|
||
|
|
return arg.map(clone);
|
||
|
|
}
|
||
|
|
if (arg instanceof Date) {
|
||
|
|
return new Date(arg.getTime());
|
||
|
|
}
|
||
|
|
if (arg instanceof RegExp) {
|
||
|
|
return cloneRegExp(arg);
|
||
|
|
}
|
||
|
|
var cloned = {};
|
||
|
|
for (var name in arg) {
|
||
|
|
if (Object.prototype.hasOwnProperty.call(arg, name)) {
|
||
|
|
cloned[name] = clone(arg[name]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return cloned;
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = clone;
|
||
|
|
|
||
|
|
},{}],4:[function(require,module,exports){
|
||
|
|
|
||
|
|
var Pipe = require('../pipe').Pipe;
|
||
|
|
|
||
|
|
var Context = function Context(){
|
||
|
|
};
|
||
|
|
|
||
|
|
Context.prototype.setResult = function(result) {
|
||
|
|
this.result = result;
|
||
|
|
this.hasResult = true;
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
|
||
|
|
Context.prototype.exit = function() {
|
||
|
|
this.exiting = true;
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
|
||
|
|
Context.prototype.switchTo = function(next, pipe) {
|
||
|
|
if (typeof next === 'string' || next instanceof Pipe) {
|
||
|
|
this.nextPipe = next;
|
||
|
|
} else {
|
||
|
|
this.next = next;
|
||
|
|
if (pipe) {
|
||
|
|
this.nextPipe = pipe;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
|
||
|
|
Context.prototype.push = function(child, name) {
|
||
|
|
child.parent = this;
|
||
|
|
if (typeof name !== 'undefined') {
|
||
|
|
child.childName = name;
|
||
|
|
}
|
||
|
|
child.root = this.root || this;
|
||
|
|
child.options = child.options || this.options;
|
||
|
|
if (!this.children) {
|
||
|
|
this.children = [child];
|
||
|
|
this.nextAfterChildren = this.next || null;
|
||
|
|
this.next = child;
|
||
|
|
} else {
|
||
|
|
this.children[this.children.length - 1].next = child;
|
||
|
|
this.children.push(child);
|
||
|
|
}
|
||
|
|
child.next = this;
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.Context = Context;
|
||
|
|
|
||
|
|
},{"../pipe":18}],5:[function(require,module,exports){
|
||
|
|
var Context = require('./context').Context;
|
||
|
|
var defaultClone = require('../clone');
|
||
|
|
|
||
|
|
var DiffContext = function DiffContext(left, right) {
|
||
|
|
this.left = left;
|
||
|
|
this.right = right;
|
||
|
|
this.pipe = 'diff';
|
||
|
|
};
|
||
|
|
|
||
|
|
DiffContext.prototype = new Context();
|
||
|
|
|
||
|
|
DiffContext.prototype.setResult = function(result) {
|
||
|
|
if (this.options.cloneDiffValues && typeof result === 'object') {
|
||
|
|
var clone = typeof this.options.cloneDiffValues === 'function' ?
|
||
|
|
this.options.cloneDiffValues : defaultClone;
|
||
|
|
if (typeof result[0] === 'object') {
|
||
|
|
result[0] = clone(result[0]);
|
||
|
|
}
|
||
|
|
if (typeof result[1] === 'object') {
|
||
|
|
result[1] = clone(result[1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return Context.prototype.setResult.apply(this, arguments);
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.DiffContext = DiffContext;
|
||
|
|
|
||
|
|
},{"../clone":3,"./context":4}],6:[function(require,module,exports){
|
||
|
|
var Context = require('./context').Context;
|
||
|
|
|
||
|
|
var PatchContext = function PatchContext(left, delta) {
|
||
|
|
this.left = left;
|
||
|
|
this.delta = delta;
|
||
|
|
this.pipe = 'patch';
|
||
|
|
};
|
||
|
|
|
||
|
|
PatchContext.prototype = new Context();
|
||
|
|
|
||
|
|
exports.PatchContext = PatchContext;
|
||
|
|
|
||
|
|
},{"./context":4}],7:[function(require,module,exports){
|
||
|
|
var Context = require('./context').Context;
|
||
|
|
|
||
|
|
var ReverseContext = function ReverseContext(delta) {
|
||
|
|
this.delta = delta;
|
||
|
|
this.pipe = 'reverse';
|
||
|
|
};
|
||
|
|
|
||
|
|
ReverseContext.prototype = new Context();
|
||
|
|
|
||
|
|
exports.ReverseContext = ReverseContext;
|
||
|
|
|
||
|
|
},{"./context":4}],8:[function(require,module,exports){
|
||
|
|
// use as 2nd parameter for JSON.parse to revive Date instances
|
||
|
|
module.exports = function dateReviver(key, value) {
|
||
|
|
var parts;
|
||
|
|
if (typeof value === 'string') {
|
||
|
|
parts = /^(\d{4})-(\d{2})-(\d{2})T(\d{2}):(\d{2}):(\d{2})(?:\.(\d*))?(Z|([+\-])(\d{2}):(\d{2}))$/.exec(value);
|
||
|
|
if (parts) {
|
||
|
|
return new Date(Date.UTC(+parts[1], +parts[2] - 1, +parts[3], +parts[4], +parts[5], +parts[6], +(parts[7] || 0)));
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return value;
|
||
|
|
};
|
||
|
|
|
||
|
|
},{}],9:[function(require,module,exports){
|
||
|
|
var Processor = require('./processor').Processor;
|
||
|
|
var Pipe = require('./pipe').Pipe;
|
||
|
|
var DiffContext = require('./contexts/diff').DiffContext;
|
||
|
|
var PatchContext = require('./contexts/patch').PatchContext;
|
||
|
|
var ReverseContext = require('./contexts/reverse').ReverseContext;
|
||
|
|
|
||
|
|
var clone = require('./clone');
|
||
|
|
|
||
|
|
var trivial = require('./filters/trivial');
|
||
|
|
var nested = require('./filters/nested');
|
||
|
|
var arrays = require('./filters/arrays');
|
||
|
|
var dates = require('./filters/dates');
|
||
|
|
var texts = require('./filters/texts');
|
||
|
|
|
||
|
|
var DiffPatcher = function DiffPatcher(options) {
|
||
|
|
this.processor = new Processor(options);
|
||
|
|
this.processor.pipe(new Pipe('diff').append(
|
||
|
|
nested.collectChildrenDiffFilter,
|
||
|
|
trivial.diffFilter,
|
||
|
|
dates.diffFilter,
|
||
|
|
texts.diffFilter,
|
||
|
|
nested.objectsDiffFilter,
|
||
|
|
arrays.diffFilter
|
||
|
|
).shouldHaveResult());
|
||
|
|
this.processor.pipe(new Pipe('patch').append(
|
||
|
|
nested.collectChildrenPatchFilter,
|
||
|
|
arrays.collectChildrenPatchFilter,
|
||
|
|
trivial.patchFilter,
|
||
|
|
texts.patchFilter,
|
||
|
|
nested.patchFilter,
|
||
|
|
arrays.patchFilter
|
||
|
|
).shouldHaveResult());
|
||
|
|
this.processor.pipe(new Pipe('reverse').append(
|
||
|
|
nested.collectChildrenReverseFilter,
|
||
|
|
arrays.collectChildrenReverseFilter,
|
||
|
|
trivial.reverseFilter,
|
||
|
|
texts.reverseFilter,
|
||
|
|
nested.reverseFilter,
|
||
|
|
arrays.reverseFilter
|
||
|
|
).shouldHaveResult());
|
||
|
|
};
|
||
|
|
|
||
|
|
DiffPatcher.prototype.options = function() {
|
||
|
|
return this.processor.options.apply(this.processor, arguments);
|
||
|
|
};
|
||
|
|
|
||
|
|
DiffPatcher.prototype.diff = function(left, right) {
|
||
|
|
return this.processor.process(new DiffContext(left, right));
|
||
|
|
};
|
||
|
|
|
||
|
|
DiffPatcher.prototype.patch = function(left, delta) {
|
||
|
|
return this.processor.process(new PatchContext(left, delta));
|
||
|
|
};
|
||
|
|
|
||
|
|
DiffPatcher.prototype.reverse = function(delta) {
|
||
|
|
return this.processor.process(new ReverseContext(delta));
|
||
|
|
};
|
||
|
|
|
||
|
|
DiffPatcher.prototype.unpatch = function(right, delta) {
|
||
|
|
return this.patch(right, this.reverse(delta));
|
||
|
|
};
|
||
|
|
|
||
|
|
DiffPatcher.prototype.clone = function(value) {
|
||
|
|
return clone(value);
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.DiffPatcher = DiffPatcher;
|
||
|
|
|
||
|
|
},{"./clone":3,"./contexts/diff":5,"./contexts/patch":6,"./contexts/reverse":7,"./filters/arrays":11,"./filters/dates":12,"./filters/nested":14,"./filters/texts":15,"./filters/trivial":16,"./pipe":18,"./processor":19}],10:[function(require,module,exports){
|
||
|
|
|
||
|
|
exports.isBrowser = typeof window !== 'undefined';
|
||
|
|
|
||
|
|
},{}],11:[function(require,module,exports){
|
||
|
|
var DiffContext = require('../contexts/diff').DiffContext;
|
||
|
|
var PatchContext = require('../contexts/patch').PatchContext;
|
||
|
|
var ReverseContext = require('../contexts/reverse').ReverseContext;
|
||
|
|
|
||
|
|
var lcs = require('./lcs');
|
||
|
|
|
||
|
|
var ARRAY_MOVE = 3;
|
||
|
|
|
||
|
|
var isArray = (typeof Array.isArray === 'function') ?
|
||
|
|
// use native function
|
||
|
|
Array.isArray :
|
||
|
|
// use instanceof operator
|
||
|
|
function(a) {
|
||
|
|
return a instanceof Array;
|
||
|
|
};
|
||
|
|
|
||
|
|
var arrayIndexOf = typeof Array.prototype.indexOf === 'function' ?
|
||
|
|
function(array, item) {
|
||
|
|
return array.indexOf(item);
|
||
|
|
} : function(array, item) {
|
||
|
|
var length = array.length;
|
||
|
|
for (var i = 0; i < length; i++) {
|
||
|
|
if (array[i] === item) {
|
||
|
|
return i;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return -1;
|
||
|
|
};
|
||
|
|
|
||
|
|
function arraysHaveMatchByRef(array1, array2, len1, len2) {
|
||
|
|
for (var index1 = 0; index1 < len1; index1++) {
|
||
|
|
var val1 = array1[index1];
|
||
|
|
for (var index2 = 0; index2 < len2; index2++) {
|
||
|
|
var val2 = array2[index2];
|
||
|
|
if (index1 !== index2 && val1 === val2) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
function matchItems(array1, array2, index1, index2, context) {
|
||
|
|
var value1 = array1[index1];
|
||
|
|
var value2 = array2[index2];
|
||
|
|
if (value1 === value2) {
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
if (typeof value1 !== 'object' || typeof value2 !== 'object') {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
var objectHash = context.objectHash;
|
||
|
|
if (!objectHash) {
|
||
|
|
// no way to match objects was provided, try match by position
|
||
|
|
return context.matchByPosition && index1 === index2;
|
||
|
|
}
|
||
|
|
var hash1;
|
||
|
|
var hash2;
|
||
|
|
if (typeof index1 === 'number') {
|
||
|
|
context.hashCache1 = context.hashCache1 || [];
|
||
|
|
hash1 = context.hashCache1[index1];
|
||
|
|
if (typeof hash1 === 'undefined') {
|
||
|
|
context.hashCache1[index1] = hash1 = objectHash(value1, index1);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
hash1 = objectHash(value1);
|
||
|
|
}
|
||
|
|
if (typeof hash1 === 'undefined') {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
if (typeof index2 === 'number') {
|
||
|
|
context.hashCache2 = context.hashCache2 || [];
|
||
|
|
hash2 = context.hashCache2[index2];
|
||
|
|
if (typeof hash2 === 'undefined') {
|
||
|
|
context.hashCache2[index2] = hash2 = objectHash(value2, index2);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
hash2 = objectHash(value2);
|
||
|
|
}
|
||
|
|
if (typeof hash2 === 'undefined') {
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
return hash1 === hash2;
|
||
|
|
}
|
||
|
|
|
||
|
|
var diffFilter = function arraysDiffFilter(context) {
|
||
|
|
if (!context.leftIsArray) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
var matchContext = {
|
||
|
|
objectHash: context.options && context.options.objectHash,
|
||
|
|
matchByPosition: context.options && context.options.matchByPosition
|
||
|
|
};
|
||
|
|
var commonHead = 0;
|
||
|
|
var commonTail = 0;
|
||
|
|
var index;
|
||
|
|
var index1;
|
||
|
|
var index2;
|
||
|
|
var array1 = context.left;
|
||
|
|
var array2 = context.right;
|
||
|
|
var len1 = array1.length;
|
||
|
|
var len2 = array2.length;
|
||
|
|
|
||
|
|
var child;
|
||
|
|
|
||
|
|
if (len1 > 0 && len2 > 0 && !matchContext.objectHash &&
|
||
|
|
typeof matchContext.matchByPosition !== 'boolean') {
|
||
|
|
matchContext.matchByPosition = !arraysHaveMatchByRef(array1, array2, len1, len2);
|
||
|
|
}
|
||
|
|
|
||
|
|
// separate common head
|
||
|
|
while (commonHead < len1 && commonHead < len2 &&
|
||
|
|
matchItems(array1, array2, commonHead, commonHead, matchContext)) {
|
||
|
|
index = commonHead;
|
||
|
|
child = new DiffContext(context.left[index], context.right[index]);
|
||
|
|
context.push(child, index);
|
||
|
|
commonHead++;
|
||
|
|
}
|
||
|
|
// separate common tail
|
||
|
|
while (commonTail + commonHead < len1 && commonTail + commonHead < len2 &&
|
||
|
|
matchItems(array1, array2, len1 - 1 - commonTail, len2 - 1 - commonTail, matchContext)) {
|
||
|
|
index1 = len1 - 1 - commonTail;
|
||
|
|
index2 = len2 - 1 - commonTail;
|
||
|
|
child = new DiffContext(context.left[index1], context.right[index2]);
|
||
|
|
context.push(child, index2);
|
||
|
|
commonTail++;
|
||
|
|
}
|
||
|
|
var result;
|
||
|
|
if (commonHead + commonTail === len1) {
|
||
|
|
if (len1 === len2) {
|
||
|
|
// arrays are identical
|
||
|
|
context.setResult(undefined).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// trivial case, a block (1 or more consecutive items) was added
|
||
|
|
result = result || {
|
||
|
|
_t: 'a'
|
||
|
|
};
|
||
|
|
for (index = commonHead; index < len2 - commonTail; index++) {
|
||
|
|
result[index] = [array2[index]];
|
||
|
|
}
|
||
|
|
context.setResult(result).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (commonHead + commonTail === len2) {
|
||
|
|
// trivial case, a block (1 or more consecutive items) was removed
|
||
|
|
result = result || {
|
||
|
|
_t: 'a'
|
||
|
|
};
|
||
|
|
for (index = commonHead; index < len1 - commonTail; index++) {
|
||
|
|
result['_' + index] = [array1[index], 0, 0];
|
||
|
|
}
|
||
|
|
context.setResult(result).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// reset hash cache
|
||
|
|
delete matchContext.hashCache1;
|
||
|
|
delete matchContext.hashCache2;
|
||
|
|
|
||
|
|
// diff is not trivial, find the LCS (Longest Common Subsequence)
|
||
|
|
var trimmed1 = array1.slice(commonHead, len1 - commonTail);
|
||
|
|
var trimmed2 = array2.slice(commonHead, len2 - commonTail);
|
||
|
|
var seq = lcs.get(
|
||
|
|
trimmed1, trimmed2,
|
||
|
|
matchItems,
|
||
|
|
matchContext
|
||
|
|
);
|
||
|
|
var removedItems = [];
|
||
|
|
result = result || {
|
||
|
|
_t: 'a'
|
||
|
|
};
|
||
|
|
for (index = commonHead; index < len1 - commonTail; index++) {
|
||
|
|
if (arrayIndexOf(seq.indices1, index - commonHead) < 0) {
|
||
|
|
// removed
|
||
|
|
result['_' + index] = [array1[index], 0, 0];
|
||
|
|
removedItems.push(index);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
var detectMove = true;
|
||
|
|
if (context.options && context.options.arrays && context.options.arrays.detectMove === false) {
|
||
|
|
detectMove = false;
|
||
|
|
}
|
||
|
|
var includeValueOnMove = false;
|
||
|
|
if (context.options && context.options.arrays && context.options.arrays.includeValueOnMove) {
|
||
|
|
includeValueOnMove = true;
|
||
|
|
}
|
||
|
|
|
||
|
|
var removedItemsLength = removedItems.length;
|
||
|
|
for (index = commonHead; index < len2 - commonTail; index++) {
|
||
|
|
var indexOnArray2 = arrayIndexOf(seq.indices2, index - commonHead);
|
||
|
|
if (indexOnArray2 < 0) {
|
||
|
|
// added, try to match with a removed item and register as position move
|
||
|
|
var isMove = false;
|
||
|
|
if (detectMove && removedItemsLength > 0) {
|
||
|
|
for (var removeItemIndex1 = 0; removeItemIndex1 < removedItemsLength; removeItemIndex1++) {
|
||
|
|
index1 = removedItems[removeItemIndex1];
|
||
|
|
if (matchItems(trimmed1, trimmed2, index1 - commonHead,
|
||
|
|
index - commonHead, matchContext)) {
|
||
|
|
// store position move as: [originalValue, newPosition, ARRAY_MOVE]
|
||
|
|
result['_' + index1].splice(1, 2, index, ARRAY_MOVE);
|
||
|
|
if (!includeValueOnMove) {
|
||
|
|
// don't include moved value on diff, to save bytes
|
||
|
|
result['_' + index1][0] = '';
|
||
|
|
}
|
||
|
|
|
||
|
|
index2 = index;
|
||
|
|
child = new DiffContext(context.left[index1], context.right[index2]);
|
||
|
|
context.push(child, index2);
|
||
|
|
removedItems.splice(removeItemIndex1, 1);
|
||
|
|
isMove = true;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!isMove) {
|
||
|
|
// added
|
||
|
|
result[index] = [array2[index]];
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
// match, do inner diff
|
||
|
|
index1 = seq.indices1[indexOnArray2] + commonHead;
|
||
|
|
index2 = seq.indices2[indexOnArray2] + commonHead;
|
||
|
|
child = new DiffContext(context.left[index1], context.right[index2]);
|
||
|
|
context.push(child, index2);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
context.setResult(result).exit();
|
||
|
|
|
||
|
|
};
|
||
|
|
diffFilter.filterName = 'arrays';
|
||
|
|
|
||
|
|
var compare = {
|
||
|
|
numerically: function(a, b) {
|
||
|
|
return a - b;
|
||
|
|
},
|
||
|
|
numericallyBy: function(name) {
|
||
|
|
return function(a, b) {
|
||
|
|
return a[name] - b[name];
|
||
|
|
};
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
var patchFilter = function nestedPatchFilter(context) {
|
||
|
|
if (!context.nested) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta._t !== 'a') {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var index, index1;
|
||
|
|
|
||
|
|
var delta = context.delta;
|
||
|
|
var array = context.left;
|
||
|
|
|
||
|
|
// first, separate removals, insertions and modifications
|
||
|
|
var toRemove = [];
|
||
|
|
var toInsert = [];
|
||
|
|
var toModify = [];
|
||
|
|
for (index in delta) {
|
||
|
|
if (index !== '_t') {
|
||
|
|
if (index[0] === '_') {
|
||
|
|
// removed item from original array
|
||
|
|
if (delta[index][2] === 0 || delta[index][2] === ARRAY_MOVE) {
|
||
|
|
toRemove.push(parseInt(index.slice(1), 10));
|
||
|
|
} else {
|
||
|
|
throw new Error('only removal or move can be applied at original array indices' +
|
||
|
|
', invalid diff type: ' + delta[index][2]);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
if (delta[index].length === 1) {
|
||
|
|
// added item at new array
|
||
|
|
toInsert.push({
|
||
|
|
index: parseInt(index, 10),
|
||
|
|
value: delta[index][0]
|
||
|
|
});
|
||
|
|
} else {
|
||
|
|
// modified item at new array
|
||
|
|
toModify.push({
|
||
|
|
index: parseInt(index, 10),
|
||
|
|
delta: delta[index]
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// remove items, in reverse order to avoid sawing our own floor
|
||
|
|
toRemove = toRemove.sort(compare.numerically);
|
||
|
|
for (index = toRemove.length - 1; index >= 0; index--) {
|
||
|
|
index1 = toRemove[index];
|
||
|
|
var indexDiff = delta['_' + index1];
|
||
|
|
var removedValue = array.splice(index1, 1)[0];
|
||
|
|
if (indexDiff[2] === ARRAY_MOVE) {
|
||
|
|
// reinsert later
|
||
|
|
toInsert.push({
|
||
|
|
index: indexDiff[1],
|
||
|
|
value: removedValue
|
||
|
|
});
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
// insert items, in reverse order to avoid moving our own floor
|
||
|
|
toInsert = toInsert.sort(compare.numericallyBy('index'));
|
||
|
|
var toInsertLength = toInsert.length;
|
||
|
|
for (index = 0; index < toInsertLength; index++) {
|
||
|
|
var insertion = toInsert[index];
|
||
|
|
array.splice(insertion.index, 0, insertion.value);
|
||
|
|
}
|
||
|
|
|
||
|
|
// apply modifications
|
||
|
|
var toModifyLength = toModify.length;
|
||
|
|
var child;
|
||
|
|
if (toModifyLength > 0) {
|
||
|
|
for (index = 0; index < toModifyLength; index++) {
|
||
|
|
var modification = toModify[index];
|
||
|
|
child = new PatchContext(context.left[modification.index], modification.delta);
|
||
|
|
context.push(child, modification.index);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!context.children) {
|
||
|
|
context.setResult(context.left).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
context.exit();
|
||
|
|
};
|
||
|
|
patchFilter.filterName = 'arrays';
|
||
|
|
|
||
|
|
var collectChildrenPatchFilter = function collectChildrenPatchFilter(context) {
|
||
|
|
if (!context || !context.children) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta._t !== 'a') {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var length = context.children.length;
|
||
|
|
var child;
|
||
|
|
for (var index = 0; index < length; index++) {
|
||
|
|
child = context.children[index];
|
||
|
|
context.left[child.childName] = child.result;
|
||
|
|
}
|
||
|
|
context.setResult(context.left).exit();
|
||
|
|
};
|
||
|
|
collectChildrenPatchFilter.filterName = 'arraysCollectChildren';
|
||
|
|
|
||
|
|
var reverseFilter = function arraysReverseFilter(context) {
|
||
|
|
if (!context.nested) {
|
||
|
|
if (context.delta[2] === ARRAY_MOVE) {
|
||
|
|
context.newName = '_' + context.delta[1];
|
||
|
|
context.setResult([context.delta[0], parseInt(context.childName.substr(1), 10), ARRAY_MOVE]).exit();
|
||
|
|
}
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta._t !== 'a') {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var name, child;
|
||
|
|
for (name in context.delta) {
|
||
|
|
if (name === '_t') {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
child = new ReverseContext(context.delta[name]);
|
||
|
|
context.push(child, name);
|
||
|
|
}
|
||
|
|
context.exit();
|
||
|
|
};
|
||
|
|
reverseFilter.filterName = 'arrays';
|
||
|
|
|
||
|
|
var reverseArrayDeltaIndex = function(delta, index, itemDelta) {
|
||
|
|
if (typeof index === 'string' && index[0] === '_') {
|
||
|
|
return parseInt(index.substr(1), 10);
|
||
|
|
} else if (isArray(itemDelta) && itemDelta[2] === 0) {
|
||
|
|
return '_' + index;
|
||
|
|
}
|
||
|
|
|
||
|
|
var reverseIndex = +index;
|
||
|
|
for (var deltaIndex in delta) {
|
||
|
|
var deltaItem = delta[deltaIndex];
|
||
|
|
if (isArray(deltaItem)) {
|
||
|
|
if (deltaItem[2] === ARRAY_MOVE) {
|
||
|
|
var moveFromIndex = parseInt(deltaIndex.substr(1), 10);
|
||
|
|
var moveToIndex = deltaItem[1];
|
||
|
|
if (moveToIndex === +index) {
|
||
|
|
return moveFromIndex;
|
||
|
|
}
|
||
|
|
if (moveFromIndex <= reverseIndex && moveToIndex > reverseIndex) {
|
||
|
|
reverseIndex++;
|
||
|
|
} else if (moveFromIndex >= reverseIndex && moveToIndex < reverseIndex) {
|
||
|
|
reverseIndex--;
|
||
|
|
}
|
||
|
|
} else if (deltaItem[2] === 0) {
|
||
|
|
var deleteIndex = parseInt(deltaIndex.substr(1), 10);
|
||
|
|
if (deleteIndex <= reverseIndex) {
|
||
|
|
reverseIndex++;
|
||
|
|
}
|
||
|
|
} else if (deltaItem.length === 1 && deltaIndex <= reverseIndex) {
|
||
|
|
reverseIndex--;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
return reverseIndex;
|
||
|
|
};
|
||
|
|
|
||
|
|
var collectChildrenReverseFilter = function collectChildrenReverseFilter(context) {
|
||
|
|
if (!context || !context.children) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta._t !== 'a') {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var length = context.children.length;
|
||
|
|
var child;
|
||
|
|
var delta = {
|
||
|
|
_t: 'a'
|
||
|
|
};
|
||
|
|
|
||
|
|
for (var index = 0; index < length; index++) {
|
||
|
|
child = context.children[index];
|
||
|
|
var name = child.newName;
|
||
|
|
if (typeof name === 'undefined') {
|
||
|
|
name = reverseArrayDeltaIndex(context.delta, child.childName, child.result);
|
||
|
|
}
|
||
|
|
if (delta[name] !== child.result) {
|
||
|
|
delta[name] = child.result;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
context.setResult(delta).exit();
|
||
|
|
};
|
||
|
|
collectChildrenReverseFilter.filterName = 'arraysCollectChildren';
|
||
|
|
|
||
|
|
exports.diffFilter = diffFilter;
|
||
|
|
exports.patchFilter = patchFilter;
|
||
|
|
exports.collectChildrenPatchFilter = collectChildrenPatchFilter;
|
||
|
|
exports.reverseFilter = reverseFilter;
|
||
|
|
exports.collectChildrenReverseFilter = collectChildrenReverseFilter;
|
||
|
|
|
||
|
|
},{"../contexts/diff":5,"../contexts/patch":6,"../contexts/reverse":7,"./lcs":13}],12:[function(require,module,exports){
|
||
|
|
var diffFilter = function datesDiffFilter(context) {
|
||
|
|
if (context.left instanceof Date) {
|
||
|
|
if (context.right instanceof Date) {
|
||
|
|
if (context.left.getTime() !== context.right.getTime()) {
|
||
|
|
context.setResult([context.left, context.right]);
|
||
|
|
} else {
|
||
|
|
context.setResult(undefined);
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
context.setResult([context.left, context.right]);
|
||
|
|
}
|
||
|
|
context.exit();
|
||
|
|
} else if (context.right instanceof Date) {
|
||
|
|
context.setResult([context.left, context.right]).exit();
|
||
|
|
}
|
||
|
|
};
|
||
|
|
diffFilter.filterName = 'dates';
|
||
|
|
|
||
|
|
exports.diffFilter = diffFilter;
|
||
|
|
|
||
|
|
},{}],13:[function(require,module,exports){
|
||
|
|
/*
|
||
|
|
|
||
|
|
LCS implementation that supports arrays or strings
|
||
|
|
|
||
|
|
reference: http://en.wikipedia.org/wiki/Longest_common_subsequence_problem
|
||
|
|
|
||
|
|
*/
|
||
|
|
|
||
|
|
var defaultMatch = function(array1, array2, index1, index2) {
|
||
|
|
return array1[index1] === array2[index2];
|
||
|
|
};
|
||
|
|
|
||
|
|
var lengthMatrix = function(array1, array2, match, context) {
|
||
|
|
var len1 = array1.length;
|
||
|
|
var len2 = array2.length;
|
||
|
|
var x, y;
|
||
|
|
|
||
|
|
// initialize empty matrix of len1+1 x len2+1
|
||
|
|
var matrix = [len1 + 1];
|
||
|
|
for (x = 0; x < len1 + 1; x++) {
|
||
|
|
matrix[x] = [len2 + 1];
|
||
|
|
for (y = 0; y < len2 + 1; y++) {
|
||
|
|
matrix[x][y] = 0;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
matrix.match = match;
|
||
|
|
// save sequence lengths for each coordinate
|
||
|
|
for (x = 1; x < len1 + 1; x++) {
|
||
|
|
for (y = 1; y < len2 + 1; y++) {
|
||
|
|
if (match(array1, array2, x - 1, y - 1, context)) {
|
||
|
|
matrix[x][y] = matrix[x - 1][y - 1] + 1;
|
||
|
|
} else {
|
||
|
|
matrix[x][y] = Math.max(matrix[x - 1][y], matrix[x][y - 1]);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return matrix;
|
||
|
|
};
|
||
|
|
|
||
|
|
var backtrack = function(matrix, array1, array2, index1, index2, context) {
|
||
|
|
if (index1 === 0 || index2 === 0) {
|
||
|
|
return {
|
||
|
|
sequence: [],
|
||
|
|
indices1: [],
|
||
|
|
indices2: []
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
if (matrix.match(array1, array2, index1 - 1, index2 - 1, context)) {
|
||
|
|
var subsequence = backtrack(matrix, array1, array2, index1 - 1, index2 - 1, context);
|
||
|
|
subsequence.sequence.push(array1[index1 - 1]);
|
||
|
|
subsequence.indices1.push(index1 - 1);
|
||
|
|
subsequence.indices2.push(index2 - 1);
|
||
|
|
return subsequence;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (matrix[index1][index2 - 1] > matrix[index1 - 1][index2]) {
|
||
|
|
return backtrack(matrix, array1, array2, index1, index2 - 1, context);
|
||
|
|
} else {
|
||
|
|
return backtrack(matrix, array1, array2, index1 - 1, index2, context);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
var get = function(array1, array2, match, context) {
|
||
|
|
context = context || {};
|
||
|
|
var matrix = lengthMatrix(array1, array2, match || defaultMatch, context);
|
||
|
|
var result = backtrack(matrix, array1, array2, array1.length, array2.length, context);
|
||
|
|
if (typeof array1 === 'string' && typeof array2 === 'string') {
|
||
|
|
result.sequence = result.sequence.join('');
|
||
|
|
}
|
||
|
|
return result;
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.get = get;
|
||
|
|
|
||
|
|
},{}],14:[function(require,module,exports){
|
||
|
|
var DiffContext = require('../contexts/diff').DiffContext;
|
||
|
|
var PatchContext = require('../contexts/patch').PatchContext;
|
||
|
|
var ReverseContext = require('../contexts/reverse').ReverseContext;
|
||
|
|
|
||
|
|
var collectChildrenDiffFilter = function collectChildrenDiffFilter(context) {
|
||
|
|
if (!context || !context.children) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var length = context.children.length;
|
||
|
|
var child;
|
||
|
|
var result = context.result;
|
||
|
|
for (var index = 0; index < length; index++) {
|
||
|
|
child = context.children[index];
|
||
|
|
if (typeof child.result === 'undefined') {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
result = result || {};
|
||
|
|
result[child.childName] = child.result;
|
||
|
|
}
|
||
|
|
if (result && context.leftIsArray) {
|
||
|
|
result._t = 'a';
|
||
|
|
}
|
||
|
|
context.setResult(result).exit();
|
||
|
|
};
|
||
|
|
collectChildrenDiffFilter.filterName = 'collectChildren';
|
||
|
|
|
||
|
|
var objectsDiffFilter = function objectsDiffFilter(context) {
|
||
|
|
if (context.leftIsArray || context.leftType !== 'object') {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
var name, child, propertyFilter = context.options.propertyFilter;
|
||
|
|
for (name in context.left) {
|
||
|
|
if (!Object.prototype.hasOwnProperty.call(context.left, name)) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (propertyFilter && !propertyFilter(name, context)) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
child = new DiffContext(context.left[name], context.right[name]);
|
||
|
|
context.push(child, name);
|
||
|
|
}
|
||
|
|
for (name in context.right) {
|
||
|
|
if (!Object.prototype.hasOwnProperty.call(context.right, name)) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (propertyFilter && !propertyFilter(name, context)) {
|
||
|
|
continue;
|
||
|
|
}
|
||
|
|
if (typeof context.left[name] === 'undefined') {
|
||
|
|
child = new DiffContext(undefined, context.right[name]);
|
||
|
|
context.push(child, name);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
if (!context.children || context.children.length === 0) {
|
||
|
|
context.setResult(undefined).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
context.exit();
|
||
|
|
};
|
||
|
|
objectsDiffFilter.filterName = 'objects';
|
||
|
|
|
||
|
|
var patchFilter = function nestedPatchFilter(context) {
|
||
|
|
if (!context.nested) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta._t) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var name, child;
|
||
|
|
for (name in context.delta) {
|
||
|
|
child = new PatchContext(context.left[name], context.delta[name]);
|
||
|
|
context.push(child, name);
|
||
|
|
}
|
||
|
|
context.exit();
|
||
|
|
};
|
||
|
|
patchFilter.filterName = 'objects';
|
||
|
|
|
||
|
|
var collectChildrenPatchFilter = function collectChildrenPatchFilter(context) {
|
||
|
|
if (!context || !context.children) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta._t) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var length = context.children.length;
|
||
|
|
var child;
|
||
|
|
for (var index = 0; index < length; index++) {
|
||
|
|
child = context.children[index];
|
||
|
|
if (Object.prototype.hasOwnProperty.call(context.left, child.childName) && child.result === undefined) {
|
||
|
|
delete context.left[child.childName];
|
||
|
|
} else if (context.left[child.childName] !== child.result) {
|
||
|
|
context.left[child.childName] = child.result;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
context.setResult(context.left).exit();
|
||
|
|
};
|
||
|
|
collectChildrenPatchFilter.filterName = 'collectChildren';
|
||
|
|
|
||
|
|
var reverseFilter = function nestedReverseFilter(context) {
|
||
|
|
if (!context.nested) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta._t) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var name, child;
|
||
|
|
for (name in context.delta) {
|
||
|
|
child = new ReverseContext(context.delta[name]);
|
||
|
|
context.push(child, name);
|
||
|
|
}
|
||
|
|
context.exit();
|
||
|
|
};
|
||
|
|
reverseFilter.filterName = 'objects';
|
||
|
|
|
||
|
|
var collectChildrenReverseFilter = function collectChildrenReverseFilter(context) {
|
||
|
|
if (!context || !context.children) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta._t) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var length = context.children.length;
|
||
|
|
var child;
|
||
|
|
var delta = {};
|
||
|
|
for (var index = 0; index < length; index++) {
|
||
|
|
child = context.children[index];
|
||
|
|
if (delta[child.childName] !== child.result) {
|
||
|
|
delta[child.childName] = child.result;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
context.setResult(delta).exit();
|
||
|
|
};
|
||
|
|
collectChildrenReverseFilter.filterName = 'collectChildren';
|
||
|
|
|
||
|
|
exports.collectChildrenDiffFilter = collectChildrenDiffFilter;
|
||
|
|
exports.objectsDiffFilter = objectsDiffFilter;
|
||
|
|
exports.patchFilter = patchFilter;
|
||
|
|
exports.collectChildrenPatchFilter = collectChildrenPatchFilter;
|
||
|
|
exports.reverseFilter = reverseFilter;
|
||
|
|
exports.collectChildrenReverseFilter = collectChildrenReverseFilter;
|
||
|
|
|
||
|
|
},{"../contexts/diff":5,"../contexts/patch":6,"../contexts/reverse":7}],15:[function(require,module,exports){
|
||
|
|
/* global diff_match_patch */
|
||
|
|
var TEXT_DIFF = 2;
|
||
|
|
var DEFAULT_MIN_LENGTH = 60;
|
||
|
|
var cachedDiffPatch = null;
|
||
|
|
|
||
|
|
var getDiffMatchPatch = function(required) {
|
||
|
|
/*jshint camelcase: false */
|
||
|
|
|
||
|
|
if (!cachedDiffPatch) {
|
||
|
|
var instance;
|
||
|
|
if (typeof diff_match_patch !== 'undefined') {
|
||
|
|
// already loaded, probably a browser
|
||
|
|
instance = typeof diff_match_patch === 'function' ?
|
||
|
|
new diff_match_patch() : new diff_match_patch.diff_match_patch();
|
||
|
|
} else if (typeof require === 'function') {
|
||
|
|
try {
|
||
|
|
var dmpModuleName = 'diff_match_patch_uncompressed';
|
||
|
|
var dmp = require('../../public/external/' + dmpModuleName);
|
||
|
|
instance = new dmp.diff_match_patch();
|
||
|
|
} catch (err) {
|
||
|
|
instance = null;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!instance) {
|
||
|
|
if (!required) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
var error = new Error('text diff_match_patch library not found');
|
||
|
|
error.diff_match_patch_not_found = true;
|
||
|
|
throw error;
|
||
|
|
}
|
||
|
|
cachedDiffPatch = {
|
||
|
|
diff: function(txt1, txt2) {
|
||
|
|
return instance.patch_toText(instance.patch_make(txt1, txt2));
|
||
|
|
},
|
||
|
|
patch: function(txt1, patch) {
|
||
|
|
var results = instance.patch_apply(instance.patch_fromText(patch), txt1);
|
||
|
|
for (var i = 0; i < results[1].length; i++) {
|
||
|
|
if (!results[1][i]) {
|
||
|
|
var error = new Error('text patch failed');
|
||
|
|
error.textPatchFailed = true;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return results[0];
|
||
|
|
}
|
||
|
|
};
|
||
|
|
}
|
||
|
|
return cachedDiffPatch;
|
||
|
|
};
|
||
|
|
|
||
|
|
var diffFilter = function textsDiffFilter(context) {
|
||
|
|
if (context.leftType !== 'string') {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var minLength = (context.options && context.options.textDiff &&
|
||
|
|
context.options.textDiff.minLength) || DEFAULT_MIN_LENGTH;
|
||
|
|
if (context.left.length < minLength ||
|
||
|
|
context.right.length < minLength) {
|
||
|
|
context.setResult([context.left, context.right]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
// large text, try to use a text-diff algorithm
|
||
|
|
var diffMatchPatch = getDiffMatchPatch();
|
||
|
|
if (!diffMatchPatch) {
|
||
|
|
// diff-match-patch library not available, fallback to regular string replace
|
||
|
|
context.setResult([context.left, context.right]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var diff = diffMatchPatch.diff;
|
||
|
|
context.setResult([diff(context.left, context.right), 0, TEXT_DIFF]).exit();
|
||
|
|
};
|
||
|
|
diffFilter.filterName = 'texts';
|
||
|
|
|
||
|
|
var patchFilter = function textsPatchFilter(context) {
|
||
|
|
if (context.nested) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta[2] !== TEXT_DIFF) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// text-diff, use a text-patch algorithm
|
||
|
|
var patch = getDiffMatchPatch(true).patch;
|
||
|
|
context.setResult(patch(context.left, context.delta[0])).exit();
|
||
|
|
};
|
||
|
|
patchFilter.filterName = 'texts';
|
||
|
|
|
||
|
|
var textDeltaReverse = function(delta) {
|
||
|
|
var i, l, lines, line, lineTmp, header = null,
|
||
|
|
headerRegex = /^@@ +\-(\d+),(\d+) +\+(\d+),(\d+) +@@$/,
|
||
|
|
lineHeader, lineAdd, lineRemove;
|
||
|
|
lines = delta.split('\n');
|
||
|
|
for (i = 0, l = lines.length; i < l; i++) {
|
||
|
|
line = lines[i];
|
||
|
|
var lineStart = line.slice(0, 1);
|
||
|
|
if (lineStart === '@') {
|
||
|
|
header = headerRegex.exec(line);
|
||
|
|
lineHeader = i;
|
||
|
|
lineAdd = null;
|
||
|
|
lineRemove = null;
|
||
|
|
|
||
|
|
// fix header
|
||
|
|
lines[lineHeader] = '@@ -' + header[3] + ',' + header[4] + ' +' + header[1] + ',' + header[2] + ' @@';
|
||
|
|
} else if (lineStart === '+') {
|
||
|
|
lineAdd = i;
|
||
|
|
lines[i] = '-' + lines[i].slice(1);
|
||
|
|
if (lines[i - 1].slice(0, 1) === '+') {
|
||
|
|
// swap lines to keep default order (-+)
|
||
|
|
lineTmp = lines[i];
|
||
|
|
lines[i] = lines[i - 1];
|
||
|
|
lines[i - 1] = lineTmp;
|
||
|
|
}
|
||
|
|
} else if (lineStart === '-') {
|
||
|
|
lineRemove = i;
|
||
|
|
lines[i] = '+' + lines[i].slice(1);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return lines.join('\n');
|
||
|
|
};
|
||
|
|
|
||
|
|
var reverseFilter = function textsReverseFilter(context) {
|
||
|
|
if (context.nested) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta[2] !== TEXT_DIFF) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
// text-diff, use a text-diff algorithm
|
||
|
|
context.setResult([textDeltaReverse(context.delta[0]), 0, TEXT_DIFF]).exit();
|
||
|
|
};
|
||
|
|
reverseFilter.filterName = 'texts';
|
||
|
|
|
||
|
|
exports.diffFilter = diffFilter;
|
||
|
|
exports.patchFilter = patchFilter;
|
||
|
|
exports.reverseFilter = reverseFilter;
|
||
|
|
|
||
|
|
},{}],16:[function(require,module,exports){
|
||
|
|
var isArray = (typeof Array.isArray === 'function') ?
|
||
|
|
// use native function
|
||
|
|
Array.isArray :
|
||
|
|
// use instanceof operator
|
||
|
|
function(a) {
|
||
|
|
return a instanceof Array;
|
||
|
|
};
|
||
|
|
|
||
|
|
var diffFilter = function trivialMatchesDiffFilter(context) {
|
||
|
|
if (context.left === context.right) {
|
||
|
|
context.setResult(undefined).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (typeof context.left === 'undefined') {
|
||
|
|
if (typeof context.right === 'function') {
|
||
|
|
throw new Error('functions are not supported');
|
||
|
|
}
|
||
|
|
context.setResult([context.right]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (typeof context.right === 'undefined') {
|
||
|
|
context.setResult([context.left, 0, 0]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (typeof context.left === 'function' || typeof context.right === 'function') {
|
||
|
|
throw new Error('functions are not supported');
|
||
|
|
}
|
||
|
|
context.leftType = context.left === null ? 'null' : typeof context.left;
|
||
|
|
context.rightType = context.right === null ? 'null' : typeof context.right;
|
||
|
|
if (context.leftType !== context.rightType) {
|
||
|
|
context.setResult([context.left, context.right]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.leftType === 'boolean' || context.leftType === 'number') {
|
||
|
|
context.setResult([context.left, context.right]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.leftType === 'object') {
|
||
|
|
context.leftIsArray = isArray(context.left);
|
||
|
|
}
|
||
|
|
if (context.rightType === 'object') {
|
||
|
|
context.rightIsArray = isArray(context.right);
|
||
|
|
}
|
||
|
|
if (context.leftIsArray !== context.rightIsArray) {
|
||
|
|
context.setResult([context.left, context.right]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (context.left instanceof RegExp) {
|
||
|
|
if (context.right instanceof RegExp) {
|
||
|
|
context.setResult([context.left.toString(), context.right.toString()]).exit();
|
||
|
|
} else {
|
||
|
|
context.setResult([context.left, context.right]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
};
|
||
|
|
diffFilter.filterName = 'trivial';
|
||
|
|
|
||
|
|
var patchFilter = function trivialMatchesPatchFilter(context) {
|
||
|
|
if (typeof context.delta === 'undefined') {
|
||
|
|
context.setResult(context.left).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
context.nested = !isArray(context.delta);
|
||
|
|
if (context.nested) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta.length === 1) {
|
||
|
|
context.setResult(context.delta[0]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta.length === 2) {
|
||
|
|
if (context.left instanceof RegExp) {
|
||
|
|
var regexArgs = /^\/(.*)\/([gimyu]+)$/.exec(context.delta[1]);
|
||
|
|
if (regexArgs) {
|
||
|
|
context.setResult(new RegExp(regexArgs[1], regexArgs[2])).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
context.setResult(context.delta[1]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta.length === 3 && context.delta[2] === 0) {
|
||
|
|
context.setResult(undefined).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
patchFilter.filterName = 'trivial';
|
||
|
|
|
||
|
|
var reverseFilter = function trivialReferseFilter(context) {
|
||
|
|
if (typeof context.delta === 'undefined') {
|
||
|
|
context.setResult(context.delta).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
context.nested = !isArray(context.delta);
|
||
|
|
if (context.nested) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta.length === 1) {
|
||
|
|
context.setResult([context.delta[0], 0, 0]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta.length === 2) {
|
||
|
|
context.setResult([context.delta[1], context.delta[0]]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (context.delta.length === 3 && context.delta[2] === 0) {
|
||
|
|
context.setResult([context.delta[0]]).exit();
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
reverseFilter.filterName = 'trivial';
|
||
|
|
|
||
|
|
exports.diffFilter = diffFilter;
|
||
|
|
exports.patchFilter = patchFilter;
|
||
|
|
exports.reverseFilter = reverseFilter;
|
||
|
|
|
||
|
|
},{}],17:[function(require,module,exports){
|
||
|
|
|
||
|
|
var environment = require('./environment');
|
||
|
|
|
||
|
|
var DiffPatcher = require('./diffpatcher').DiffPatcher;
|
||
|
|
exports.DiffPatcher = DiffPatcher;
|
||
|
|
|
||
|
|
exports.create = function(options){
|
||
|
|
return new DiffPatcher(options);
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.dateReviver = require('./date-reviver');
|
||
|
|
|
||
|
|
var defaultInstance;
|
||
|
|
|
||
|
|
exports.diff = function() {
|
||
|
|
if (!defaultInstance) {
|
||
|
|
defaultInstance = new DiffPatcher();
|
||
|
|
}
|
||
|
|
return defaultInstance.diff.apply(defaultInstance, arguments);
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.patch = function() {
|
||
|
|
if (!defaultInstance) {
|
||
|
|
defaultInstance = new DiffPatcher();
|
||
|
|
}
|
||
|
|
return defaultInstance.patch.apply(defaultInstance, arguments);
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.unpatch = function() {
|
||
|
|
if (!defaultInstance) {
|
||
|
|
defaultInstance = new DiffPatcher();
|
||
|
|
}
|
||
|
|
return defaultInstance.unpatch.apply(defaultInstance, arguments);
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.reverse = function() {
|
||
|
|
if (!defaultInstance) {
|
||
|
|
defaultInstance = new DiffPatcher();
|
||
|
|
}
|
||
|
|
return defaultInstance.reverse.apply(defaultInstance, arguments);
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.clone = function() {
|
||
|
|
if (!defaultInstance) {
|
||
|
|
defaultInstance = new DiffPatcher();
|
||
|
|
}
|
||
|
|
return defaultInstance.clone.apply(defaultInstance, arguments);
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
if (environment.isBrowser) {
|
||
|
|
exports.homepage = 'https://github.com/benjamine/jsondiffpatch';
|
||
|
|
exports.version = '0.2.4';
|
||
|
|
} else {
|
||
|
|
var packageInfoModuleName = '../package.json';
|
||
|
|
var packageInfo = require(packageInfoModuleName);
|
||
|
|
exports.homepage = packageInfo.homepage;
|
||
|
|
exports.version = packageInfo.version;
|
||
|
|
|
||
|
|
var formatterModuleName = './formatters';
|
||
|
|
var formatters = require(formatterModuleName);
|
||
|
|
exports.formatters = formatters;
|
||
|
|
// shortcut for console
|
||
|
|
exports.console = formatters.console;
|
||
|
|
}
|
||
|
|
|
||
|
|
},{"./date-reviver":8,"./diffpatcher":9,"./environment":10}],18:[function(require,module,exports){
|
||
|
|
var Pipe = function Pipe(name) {
|
||
|
|
this.name = name;
|
||
|
|
this.filters = [];
|
||
|
|
};
|
||
|
|
|
||
|
|
Pipe.prototype.process = function(input) {
|
||
|
|
if (!this.processor) {
|
||
|
|
throw new Error('add this pipe to a processor before using it');
|
||
|
|
}
|
||
|
|
var debug = this.debug;
|
||
|
|
var length = this.filters.length;
|
||
|
|
var context = input;
|
||
|
|
for (var index = 0; index < length; index++) {
|
||
|
|
var filter = this.filters[index];
|
||
|
|
if (debug) {
|
||
|
|
this.log('filter: ' + filter.filterName);
|
||
|
|
}
|
||
|
|
filter(context);
|
||
|
|
if (typeof context === 'object' && context.exiting) {
|
||
|
|
context.exiting = false;
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (!context.next && this.resultCheck) {
|
||
|
|
this.resultCheck(context);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
Pipe.prototype.log = function(msg) {
|
||
|
|
console.log('[jsondiffpatch] ' + this.name + ' pipe, ' + msg);
|
||
|
|
};
|
||
|
|
|
||
|
|
Pipe.prototype.append = function() {
|
||
|
|
this.filters.push.apply(this.filters, arguments);
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
|
||
|
|
Pipe.prototype.prepend = function() {
|
||
|
|
this.filters.unshift.apply(this.filters, arguments);
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
|
||
|
|
Pipe.prototype.indexOf = function(filterName) {
|
||
|
|
if (!filterName) {
|
||
|
|
throw new Error('a filter name is required');
|
||
|
|
}
|
||
|
|
for (var index = 0; index < this.filters.length; index++) {
|
||
|
|
var filter = this.filters[index];
|
||
|
|
if (filter.filterName === filterName) {
|
||
|
|
return index;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
throw new Error('filter not found: ' + filterName);
|
||
|
|
};
|
||
|
|
|
||
|
|
Pipe.prototype.list = function() {
|
||
|
|
var names = [];
|
||
|
|
for (var index = 0; index < this.filters.length; index++) {
|
||
|
|
var filter = this.filters[index];
|
||
|
|
names.push(filter.filterName);
|
||
|
|
}
|
||
|
|
return names;
|
||
|
|
};
|
||
|
|
|
||
|
|
Pipe.prototype.after = function(filterName) {
|
||
|
|
var index = this.indexOf(filterName);
|
||
|
|
var params = Array.prototype.slice.call(arguments, 1);
|
||
|
|
if (!params.length) {
|
||
|
|
throw new Error('a filter is required');
|
||
|
|
}
|
||
|
|
params.unshift(index + 1, 0);
|
||
|
|
Array.prototype.splice.apply(this.filters, params);
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
|
||
|
|
Pipe.prototype.before = function(filterName) {
|
||
|
|
var index = this.indexOf(filterName);
|
||
|
|
var params = Array.prototype.slice.call(arguments, 1);
|
||
|
|
if (!params.length) {
|
||
|
|
throw new Error('a filter is required');
|
||
|
|
}
|
||
|
|
params.unshift(index, 0);
|
||
|
|
Array.prototype.splice.apply(this.filters, params);
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
|
||
|
|
Pipe.prototype.clear = function() {
|
||
|
|
this.filters.length = 0;
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
|
||
|
|
Pipe.prototype.shouldHaveResult = function(should) {
|
||
|
|
if (should === false) {
|
||
|
|
this.resultCheck = null;
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
if (this.resultCheck) {
|
||
|
|
return;
|
||
|
|
}
|
||
|
|
var pipe = this;
|
||
|
|
this.resultCheck = function(context) {
|
||
|
|
if (!context.hasResult) {
|
||
|
|
console.log(context);
|
||
|
|
var error = new Error(pipe.name + ' failed');
|
||
|
|
error.noResult = true;
|
||
|
|
throw error;
|
||
|
|
}
|
||
|
|
};
|
||
|
|
return this;
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.Pipe = Pipe;
|
||
|
|
|
||
|
|
},{}],19:[function(require,module,exports){
|
||
|
|
|
||
|
|
var Processor = function Processor(options){
|
||
|
|
this.selfOptions = options || {};
|
||
|
|
this.pipes = {};
|
||
|
|
};
|
||
|
|
|
||
|
|
Processor.prototype.options = function(options) {
|
||
|
|
if (options) {
|
||
|
|
this.selfOptions = options;
|
||
|
|
}
|
||
|
|
return this.selfOptions;
|
||
|
|
};
|
||
|
|
|
||
|
|
Processor.prototype.pipe = function(name, pipe) {
|
||
|
|
if (typeof name === 'string') {
|
||
|
|
if (typeof pipe === 'undefined') {
|
||
|
|
return this.pipes[name];
|
||
|
|
} else {
|
||
|
|
this.pipes[name] = pipe;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
if (name && name.name) {
|
||
|
|
pipe = name;
|
||
|
|
if (pipe.processor === this) { return pipe; }
|
||
|
|
this.pipes[pipe.name] = pipe;
|
||
|
|
}
|
||
|
|
pipe.processor = this;
|
||
|
|
return pipe;
|
||
|
|
};
|
||
|
|
|
||
|
|
Processor.prototype.process = function(input, pipe) {
|
||
|
|
var context = input;
|
||
|
|
context.options = this.options();
|
||
|
|
var nextPipe = pipe || input.pipe || 'default';
|
||
|
|
var lastPipe, lastContext;
|
||
|
|
while (nextPipe) {
|
||
|
|
if (typeof context.nextAfterChildren !== 'undefined') {
|
||
|
|
// children processed and coming back to parent
|
||
|
|
context.next = context.nextAfterChildren;
|
||
|
|
context.nextAfterChildren = null;
|
||
|
|
}
|
||
|
|
|
||
|
|
if (typeof nextPipe === 'string') {
|
||
|
|
nextPipe = this.pipe(nextPipe);
|
||
|
|
}
|
||
|
|
nextPipe.process(context);
|
||
|
|
lastContext = context;
|
||
|
|
lastPipe = nextPipe;
|
||
|
|
nextPipe = null;
|
||
|
|
if (context) {
|
||
|
|
if (context.next) {
|
||
|
|
context = context.next;
|
||
|
|
nextPipe = lastContext.nextPipe || context.pipe || lastPipe;
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return context.hasResult ? context.result : undefined;
|
||
|
|
};
|
||
|
|
|
||
|
|
exports.Processor = Processor;
|
||
|
|
|
||
|
|
},{}]},{},[1])(1)
|
||
|
|
});
|
||
|
|
//# sourceMappingURL=data:application/json;base64,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
|