Browse Source

REPORT-20318 sonar问题修复-zack

research/11.0
Bruce.Deng 5 years ago
parent
commit
bc8bb2bd2e
  1. 457
      designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/SyntaxView.java
  2. 145
      designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/WrappedSyntaxView.java

457
designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/SyntaxView.java

@ -3,30 +3,43 @@
*
* SyntaxView.java - The View object used by RSyntaxTextArea when word wrap is
* disabled.
*
*
* This library is distributed under a modified BSD license. See the included
* RSyntaxTextArea.License.txt file for details.
*/
package com.fr.design.gui.syntax.ui.rsyntaxtextarea;
import java.awt.*;
import javax.swing.event.*;
import javax.swing.text.*;
import com.fr.design.gui.syntax.ui.rsyntaxtextarea.folding.Fold;
import com.fr.design.gui.syntax.ui.rsyntaxtextarea.folding.FoldManager;
import javax.swing.event.DocumentEvent;
import javax.swing.text.BadLocationException;
import javax.swing.text.Element;
import javax.swing.text.PlainDocument;
import javax.swing.text.Position;
import javax.swing.text.TabExpander;
import javax.swing.text.View;
import javax.swing.text.ViewFactory;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Shape;
/**
* The <code>javax.swing.text.View</code> object used by {@link RSyntaxTextArea}
* when word wrap is disabled. It implements syntax highlighting for
* programming languages using the colors and font styles specified by the
* <code>RSyntaxTextArea</code>.<p>
*
* <p>
* You don't really have to do anything to use this class, as
* {@link RSyntaxTextAreaUI} automatically sets the text area's view to be
* an instance of this class if word wrap is disabled.<p>
*
* <p>
* The tokens that specify how to paint the syntax-highlighted text are gleaned
* from the text area's {@link RSyntaxDocument}.
*
@ -34,7 +47,7 @@ import com.fr.design.gui.syntax.ui.rsyntaxtextarea.folding.FoldManager;
* @version 0.3
*/
public class SyntaxView extends View implements TabExpander,
TokenOrientedView, RSTAView {
TokenOrientedView, RSTAView {
/**
* The default font used by the text area. If this changes we need to
@ -70,7 +83,7 @@ public class SyntaxView extends View implements TabExpander,
private int ascent;
private int clipStart;
private int clipEnd;
/**
* Temporary token used when we need to "modify" tokens for rendering
* purposes. Since tokens returned from RSyntaxDocuments are treated as
@ -95,7 +108,7 @@ public class SyntaxView extends View implements TabExpander,
* of the element this view represents, looking for the line
* that is the longest. The <em>longLine</em> variable is updated to
* represent the longest line contained. The <em>font</em> variable
* is updated to indicate the font used to calculate the
* is updated to indicate the font used to calculate the
* longest line.
*/
void calculateLongestLine() {
@ -105,7 +118,7 @@ public class SyntaxView extends View implements TabExpander,
tabSize = getTabSize() * metrics.charWidth(' ');
Element lines = getElement();
int n = lines.getElementCount();
for (int i=0; i<n; i++) {
for (int i = 0; i < n; i++) {
Element line = lines.getElement(i);
float w = getLineWidth(i);
if (w > longLineWidth) {
@ -121,8 +134,8 @@ public class SyntaxView extends View implements TabExpander,
* in a location that this view is responsible for.
*
* @param changes the change information from the associated document
* @param a the current allocation of the view
* @param f the factory to use to rebuild if the view has children
* @param a the current allocation of the view
* @param f the factory to use to rebuild if the view has children
* @see View#changedUpdate
*/
@Override
@ -135,22 +148,21 @@ public class SyntaxView extends View implements TabExpander,
* Repaint the given line range.
*
* @param line0 The starting line number to repaint. This must
* be a valid line number in the model.
* be a valid line number in the model.
* @param line1 The ending line number to repaint. This must
* be a valid line number in the model.
* @param a The region allocated for the view to render into.
* @param host The component hosting the view (used to call repaint).
* be a valid line number in the model.
* @param a The region allocated for the view to render into.
* @param host The component hosting the view (used to call repaint).
*/
protected void damageLineRange(int line0, int line1, Shape a,
Component host) {
Component host) {
if (a != null) {
Rectangle area0 = lineToRect(a, line0);
Rectangle area1 = lineToRect(a, line1);
if ((area0 != null) && (area1 != null)) {
Rectangle dmg = area0.union(area1); // damage.
host.repaint(dmg.x, dmg.y, dmg.width, dmg.height);
}
else
} else
host.repaint();
}
}
@ -163,19 +175,19 @@ public class SyntaxView extends View implements TabExpander,
* off.
*
* @param painter The painter to render the tokens.
* @param token The list of tokens to draw.
* @param g The graphics context in which to draw.
* @param x The x-coordinate at which to draw.
* @param y The y-coordinate at which to draw.
* @param token The list of tokens to draw.
* @param g The graphics context in which to draw.
* @param x The x-coordinate at which to draw.
* @param y The y-coordinate at which to draw.
* @return The x-coordinate representing the end of the painted text.
*/
private float drawLine(TokenPainter painter, Token token, Graphics2D g,
float x, float y) {
float x, float y) {
float nextX = x; // The x-value at the end of our text.
float nextX = x; // The x-value at the end of our text.
while (token!=null && token.isPaintable() && nextX<clipEnd) {
nextX = painter.paint(token, g, nextX,y, host, this, clipStart);
while (token != null && token.isPaintable() && nextX < clipEnd) {
nextX = painter.paint(token, g, nextX, y, host, this, clipStart);
token = token.getNextToken();
}
@ -198,29 +210,29 @@ public class SyntaxView extends View implements TabExpander,
* language. Tokens are checked for being in a selected region, and are
* rendered appropriately if they are.
*
* @param painter The painter to render the tokens.
* @param token The list of tokens to draw.
* @param g The graphics context in which to draw.
* @param x The x-coordinate at which to draw.
* @param y The y-coordinate at which to draw.
* @param painter The painter to render the tokens.
* @param token The list of tokens to draw.
* @param g The graphics context in which to draw.
* @param x The x-coordinate at which to draw.
* @param y The y-coordinate at which to draw.
* @param selStart The start of the selection.
* @param selEnd The end of the selection.
* @param selEnd The end of the selection.
* @return The x-coordinate representing the end of the painted text.
*/
private float drawLineWithSelection(TokenPainter painter, Token token,
Graphics2D g, float x, float y, int selStart, int selEnd) {
Graphics2D g, float x, float y, int selStart, int selEnd) {
float nextX = x; // The x-value at the end of our text.
float nextX = x; // The x-value at the end of our text.
while (token!=null && token.isPaintable() && nextX<clipEnd) {
while (token != null && token.isPaintable() && nextX < clipEnd) {
// Selection starts in this token
if (token.containsPosition(selStart)) {
if (selStart>token.getOffset()) {
if (selStart > token.getOffset()) {
tempToken.copyFrom(token);
tempToken.textCount = selStart - tempToken.getOffset();
nextX = painter.paint(tempToken,g,nextX,y,host, this, clipStart);
nextX = painter.paint(tempToken, g, nextX, y, host, this, clipStart);
tempToken.textCount = token.length();
tempToken.makeStartAt(selStart);
// Clone required since token and tempToken must be
@ -229,21 +241,20 @@ public class SyntaxView extends View implements TabExpander,
}
int tokenLen = token.length();
int selCount = Math.min(tokenLen, selEnd-token.getOffset());
if (selCount==tokenLen) {
nextX = painter.paintSelected(token, g, nextX,y, host,
this, clipStart);
}
else {
int selCount = Math.min(tokenLen, selEnd - token.getOffset());
if (selCount == tokenLen) {
nextX = painter.paintSelected(token, g, nextX, y, host,
this, clipStart);
} else {
tempToken.copyFrom(token);
tempToken.textCount = selCount;
nextX = painter.paintSelected(tempToken, g, nextX,y, host,
nextX = painter.paintSelected(tempToken, g, nextX, y, host,
this, clipStart);
tempToken.textCount = token.length();
tempToken.makeStartAt(token.getOffset() + selCount);
token = tempToken;
nextX = painter.paint(token, g, nextX,y, host, this,
clipStart);
nextX = painter.paint(token, g, nextX, y, host, this,
clipStart);
}
}
@ -252,24 +263,24 @@ public class SyntaxView extends View implements TabExpander,
else if (token.containsPosition(selEnd)) {
tempToken.copyFrom(token);
tempToken.textCount = selEnd - tempToken.getOffset();
nextX = painter.paintSelected(tempToken, g, nextX,y, host, this,
nextX = painter.paintSelected(tempToken, g, nextX, y, host, this,
clipStart);
tempToken.textCount = token.length();
tempToken.makeStartAt(selEnd);
token = tempToken;
nextX = painter.paint(token, g, nextX,y, host, this, clipStart);
nextX = painter.paint(token, g, nextX, y, host, this, clipStart);
}
// This token is entirely selected
else if (token.getOffset()>=selStart &&
token.getEndOffset()<=selEnd) {
nextX = painter.paintSelected(token, g, nextX,y, host, this,
else if (token.getOffset() >= selStart &&
token.getEndOffset() <= selEnd) {
nextX = painter.paintSelected(token, g, nextX, y, host, this,
clipStart);
}
// This token is entirely unselected
else {
nextX = painter.paint(token, g, nextX,y, host, this, clipStart);
nextX = painter.paint(token, g, nextX, y, host, this, clipStart);
}
token = token.getNextToken();
@ -293,42 +304,42 @@ public class SyntaxView extends View implements TabExpander,
/**
* Calculates the width of the line represented by the given element.
*
* @param line The line for which to get the length.
* @param line The line for which to get the length.
* @param lineNumber The line number of the specified line in the document.
* @return The width of the line.
*/
private float getLineWidth(int lineNumber) {
Token tokenList = ((RSyntaxDocument)getDocument()).
getTokenListForLine(lineNumber);
Token tokenList = ((RSyntaxDocument) getDocument()).
getTokenListForLine(lineNumber);
return RSyntaxUtilities.getTokenListWidth(tokenList,
(RSyntaxTextArea)getContainer(),
this);
(RSyntaxTextArea) getContainer(),
this);
}
/**
* Provides a way to determine the next visually represented model
* Provides a way to determine the next visually represented model
* location that one might place a caret. Some views may not be visible,
* they might not be in the same order found in the model, or they just
* might not allow access to some of the locations in the model.
*
* @param pos the position to convert >= 0
* @param a the allocated region to render into
* @param pos the position to convert >= 0
* @param a the allocated region to render into
* @param direction the direction from the current position that can
* be thought of as the arrow keys typically found on a keyboard.
* This may be SwingConstants.WEST, SwingConstants.EAST,
* SwingConstants.NORTH, or SwingConstants.SOUTH.
* be thought of as the arrow keys typically found on a keyboard.
* This may be SwingConstants.WEST, SwingConstants.EAST,
* SwingConstants.NORTH, or SwingConstants.SOUTH.
* @return the location within the model that best represents the next
* location visual position.
* @exception BadLocationException
* @exception IllegalArgumentException for an invalid direction
* location visual position.
* @throws BadLocationException
* @throws IllegalArgumentException for an invalid direction
*/
@Override
public int getNextVisualPositionFrom(int pos, Position.Bias b, Shape a,
int direction, Position.Bias[] biasRet)
throws BadLocationException {
public int getNextVisualPositionFrom(int pos, Position.Bias b, Shape a,
int direction, Position.Bias[] biasRet)
throws BadLocationException {
return RSyntaxUtilities.getNextVisualPositionFrom(pos, b, a,
direction, biasRet, this);
direction, biasRet, this);
}
@ -337,11 +348,11 @@ public class SyntaxView extends View implements TabExpander,
* axis.
*
* @param axis may be either View.X_AXIS or View.Y_AXIS
* @return the span the view would like to be rendered into >= 0.
* Typically the view is told to render into the span
* that is returned, although there is no guarantee.
* The parent may choose to resize or break the view.
* @exception IllegalArgumentException for an invalid axis
* @return the span the view would like to be rendered into >= 0.
* Typically the view is told to render into the span
* that is returned, although there is no guarantee.
* The parent may choose to resize or break the view.
* @throws IllegalArgumentException for an invalid axis
*/
@Override
public float getPreferredSpan(int axis) {
@ -357,13 +368,13 @@ public class SyntaxView extends View implements TabExpander,
// We update lineHeight here as when this method is first
// called, lineHeight isn't initialized. If we don't do it
// here, we get no vertical scrollbar (as lineHeight==0).
lineHeight = host!=null ? host.getLineHeight() : lineHeight;
lineHeight = host != null ? host.getLineHeight() : lineHeight;
// return getElement().getElementCount() * lineHeight;
int visibleLineCount = getElement().getElementCount();
if (host.isCodeFoldingEnabled()) {
visibleLineCount -= host.getFoldManager().getHiddenLineCount();
}
return visibleLineCount * lineHeight;
int visibleLineCount = getElement().getElementCount();
if (host.isCodeFoldingEnabled()) {
visibleLineCount -= host.getFoldManager().getHiddenLineCount();
}
return visibleLineCount * lineHeight;
default:
throw new IllegalArgumentException("Invalid axis: " + axis);
}
@ -378,7 +389,7 @@ return visibleLineCount * lineHeight;
*/
private final int getRhsCorrection() {
int rhsCorrection = 10;
if (host!=null) {
if (host != null) {
rhsCorrection = host.getRightHandSideCorrection();
}
return rhsCorrection;
@ -391,8 +402,8 @@ return visibleLineCount * lineHeight;
* @return The tab size.
*/
private int getTabSize() {
Integer i = (Integer)getDocument().getProperty(
PlainDocument.tabSizeAttribute);
Integer i = (Integer) getDocument().getProperty(
PlainDocument.tabSizeAttribute);
int size = (i != null) ? i.intValue() : 5;
return size;
}
@ -407,26 +418,25 @@ return visibleLineCount * lineHeight;
*
* @param offset The offset in question.
* @return A token list for the physical (and in this view, logical) line
* before this one. If <code>offset</code> is in the first line in
* the document, <code>null</code> is returned.
* before this one. If <code>offset</code> is in the first line in
* the document, <code>null</code> is returned.
*/
public Token getTokenListForPhysicalLineAbove(int offset) {
RSyntaxDocument document = (RSyntaxDocument)getDocument();
RSyntaxDocument document = (RSyntaxDocument) getDocument();
Element map = document.getDefaultRootElement();
int line = map.getElementIndex(offset);
FoldManager fm = host.getFoldManager();
if (fm==null) {
line--;
if (line>=0) {
return document.getTokenListForLine(line);
}
}
else {
line = fm.getVisibleLineAbove(line);
if (line>=0) {
return document.getTokenListForLine(line);
}
}
int line = map.getElementIndex(offset);
FoldManager fm = host.getFoldManager();
if (fm == null) {
line--;
if (line >= 0) {
return document.getTokenListForLine(line);
}
} else {
line = fm.getVisibleLineAbove(line);
if (line >= 0) {
return document.getTokenListForLine(line);
}
}
// int line = map.getElementIndex(offset) - 1;
// if (line>=0)
// return document.getTokenListForLine(line);
@ -443,26 +453,25 @@ else {
*
* @param offset The offset in question.
* @return A token list for the physical (and in this view, logical) line
* after this one. If <code>offset</code> is in the last physical
* line in the document, <code>null</code> is returned.
* after this one. If <code>offset</code> is in the last physical
* line in the document, <code>null</code> is returned.
*/
public Token getTokenListForPhysicalLineBelow(int offset) {
RSyntaxDocument document = (RSyntaxDocument)getDocument();
RSyntaxDocument document = (RSyntaxDocument) getDocument();
Element map = document.getDefaultRootElement();
int lineCount = map.getElementCount();
int line = map.getElementIndex(offset);
if (!host.isCodeFoldingEnabled()) {
if (line<lineCount-1) {
return document.getTokenListForLine(line+1);
}
}
else {
FoldManager fm = host.getFoldManager();
line = fm.getVisibleLineBelow(line);
if (line>=0 && line<lineCount) {
return document.getTokenListForLine(line);
}
}
int line = map.getElementIndex(offset);
if (!host.isCodeFoldingEnabled()) {
if (line < lineCount - 1) {
return document.getTokenListForLine(line + 1);
}
} else {
FoldManager fm = host.getFoldManager();
line = fm.getVisibleLineBelow(line);
if (line >= 0 && line < lineCount) {
return document.getTokenListForLine(line);
}
}
// int line = map.getElementIndex(offset);
// int lineCount = map.getElementCount();
// if (line<lineCount-1)
@ -476,8 +485,8 @@ else {
* in a location that this view is responsible for.
*
* @param changes The change information from the associated document.
* @param a The current allocation of the view.
* @param f The factory to use to rebuild if the view has children.
* @param a The current allocation of the view.
* @param f The factory to use to rebuild if the view has children.
*/
@Override
public void insertUpdate(DocumentEvent changes, Shape a, ViewFactory f) {
@ -488,9 +497,9 @@ else {
/**
* Determine the rectangle that represents the given line.
*
* @param a The region allocated for the view to render into
* @param a The region allocated for the view to render into
* @param line The line number to find the region of. This must
* be a valid line number in the model.
* be a valid line number in the model.
*/
protected Rectangle lineToRect(Shape a, int line) {
Rectangle r = null;
@ -500,14 +509,14 @@ else {
// NOTE: lineHeight is not initially set here, leading to the
// current line not being highlighted when a document is first
// opened. So, we set it here just in case.
lineHeight = host!=null ? host.getLineHeight() : lineHeight;
if (host.isCodeFoldingEnabled()) {
FoldManager fm = host.getFoldManager();
int hiddenCount = fm.getHiddenLineCountAbove(line);
line -= hiddenCount;
}
r = new Rectangle(alloc.x, alloc.y + line*lineHeight,
alloc.width, lineHeight);
lineHeight = host != null ? host.getLineHeight() : lineHeight;
if (host != null && host.isCodeFoldingEnabled()) {
FoldManager fm = host.getFoldManager();
int hiddenCount = fm.getHiddenLineCountAbove(line);
line -= hiddenCount;
}
r = new Rectangle(alloc.x, alloc.y + line * lineHeight,
alloc.width, lineHeight);
}
return r;
}
@ -518,19 +527,19 @@ if (host.isCodeFoldingEnabled()) {
* to the coordinate space of the view mapped to it.
*
* @param pos the position to convert >= 0
* @param a the allocated region to render into
* @param a the allocated region to render into
* @return the bounding box of the given position
* @exception BadLocationException if the given position does not
* represent a valid location in the associated document
* @throws BadLocationException if the given position does not
* represent a valid location in the associated document
* @see View#modelToView
*/
@Override
public Shape modelToView(int pos, Shape a, Position.Bias b)
throws BadLocationException {
throws BadLocationException {
// line coordinates
Element map = getElement();
RSyntaxDocument doc = (RSyntaxDocument)getDocument();
RSyntaxDocument doc = (RSyntaxDocument) getDocument();
int lineIndex = map.getElementIndex(pos);
Token tokenList = doc.getTokenListForLine(lineIndex);
Rectangle lineArea = lineToRect(a, lineIndex);
@ -542,8 +551,8 @@ if (host.isCodeFoldingEnabled()) {
// We use this method instead as it returns the actual bounding box,
// not just the x-coordinate.
lineArea = tokenList.listOffsetToView(
(RSyntaxTextArea)getContainer(), this, pos,
tabBase, lineArea);
(RSyntaxTextArea) getContainer(), this, pos,
tabBase, lineArea);
return lineArea;
@ -554,7 +563,7 @@ if (host.isCodeFoldingEnabled()) {
* Provides a mapping, for a given region, from the document model
* coordinate space to the view coordinate space. The specified region is
* created as a union of the first and last character positions.<p>
*
* <p>
* This is implemented to subtract the width of the second character, as
* this view's <code>modelToView</code> actually returns the width of the
* character instead of "1" or "0" like the View implementations in
@ -565,34 +574,34 @@ if (host.isCodeFoldingEnabled()) {
*
* @param p0 the position of the first character (>=0)
* @param b0 The bias of the first character position, toward the previous
* character or the next character represented by the offset, in
* case the position is a boundary of two views; <code>b0</code>
* will have one of these values:
* <ul>
* <li> <code>Position.Bias.Forward</code>
* <li> <code>Position.Bias.Backward</code>
* </ul>
* character or the next character represented by the offset, in
* case the position is a boundary of two views; <code>b0</code>
* will have one of these values:
* <ul>
* <li> <code>Position.Bias.Forward</code>
* <li> <code>Position.Bias.Backward</code>
* </ul>
* @param p1 the position of the last character (>=0)
* @param b1 the bias for the second character position, defined
* one of the legal values shown above
* @param a the area of the view, which encompasses the requested region
* one of the legal values shown above
* @param a the area of the view, which encompasses the requested region
* @return the bounding box which is a union of the region specified
* by the first and last character positions
* @exception BadLocationException if the given position does
* not represent a valid location in the associated document
* @exception IllegalArgumentException if <code>b0</code> or
* <code>b1</code> are not one of the
* legal <code>Position.Bias</code> values listed above
* by the first and last character positions
* @throws BadLocationException if the given position does
* not represent a valid location in the associated document
* @throws IllegalArgumentException if <code>b0</code> or
* <code>b1</code> are not one of the
* legal <code>Position.Bias</code> values listed above
* @see View#viewToModel
*/
@Override
public Shape modelToView(int p0, Position.Bias b0,
int p1, Position.Bias b1,
Shape a) throws BadLocationException {
int p1, Position.Bias b1,
Shape a) throws BadLocationException {
Shape s0 = modelToView(p0, a, b0);
Shape s1;
if (p1 ==getEndOffset()) {
if (p1 == getEndOffset()) {
try {
s1 = modelToView(p1, a, b1);
} catch (BadLocationException ble) {
@ -600,21 +609,20 @@ if (host.isCodeFoldingEnabled()) {
}
if (s1 == null) {
// Assume extends left to right.
Rectangle alloc = (a instanceof Rectangle) ? (Rectangle)a :
a.getBounds();
Rectangle alloc = (a instanceof Rectangle) ? (Rectangle) a :
a.getBounds();
s1 = new Rectangle(alloc.x + alloc.width - 1, alloc.y,
1, alloc.height);
1, alloc.height);
}
}
else {
} else {
s1 = modelToView(p1, a, b1);
}
Rectangle r0 = s0 instanceof Rectangle ? (Rectangle)s0 : s0.getBounds();
Rectangle r1 = s1 instanceof Rectangle ? (Rectangle)s1 : s1.getBounds();
Rectangle r0 = s0 instanceof Rectangle ? (Rectangle) s0 : s0.getBounds();
Rectangle r1 = s1 instanceof Rectangle ? (Rectangle) s1 : s1.getBounds();
if (r0.y != r1.y) {
// If it spans lines, force it to be the width of the view.
Rectangle alloc = (a instanceof Rectangle) ? (Rectangle)a :
a.getBounds();
Rectangle alloc = (a instanceof Rectangle) ? (Rectangle) a :
a.getBounds();
r0.x = alloc.x;
r0.width = alloc.width;
}
@ -627,7 +635,7 @@ if (host.isCodeFoldingEnabled()) {
// this, one character too many is highlighted thanks to our
// modelToView() implementation returning the actual width of the
// character requested!
if (p1>p0) r0.width -= r1.width;
if (p1 > p0) r0.width -= r1.width;
return r0;
@ -639,15 +647,15 @@ if (host.isCodeFoldingEnabled()) {
* This implementation does not support things like centering so it
* ignores the tabOffset argument.
*
* @param x the current position >= 0
* @param x the current position >= 0
* @param tabOffset the position within the text stream
* that the tab occurred at >= 0.
* that the tab occurred at >= 0.
* @return the tab stop, measured in points >= 0
*/
public float nextTabStop(float x, int tabOffset) {
if (tabSize == 0)
return x;
int ntabs = (((int)x) - tabBase) / tabSize;
int ntabs = (((int) x) - tabBase) / tabSize;
return tabBase + ((ntabs + 1) * tabSize);
}
@ -662,12 +670,12 @@ if (host.isCodeFoldingEnabled()) {
@Override
public void paint(Graphics g, Shape a) {
RSyntaxDocument document = (RSyntaxDocument)getDocument();
RSyntaxDocument document = (RSyntaxDocument) getDocument();
Rectangle alloc = a.getBounds();
tabBase = alloc.x;
host = (RSyntaxTextArea)getContainer();
host = (RSyntaxTextArea) getContainer();
Rectangle clip = g.getClipBounds();
// An attempt to speed things up for files with long lines. Note that
@ -695,52 +703,51 @@ if (host.isCodeFoldingEnabled()) {
boolean useSelectedTextColor = host.getUseSelectedTextColor();
RSyntaxTextAreaHighlighter h =
(RSyntaxTextAreaHighlighter)host.getHighlighter();
(RSyntaxTextAreaHighlighter) host.getHighlighter();
Graphics2D g2d = (Graphics2D)g;
Graphics2D g2d = (Graphics2D) g;
Token token;
//System.err.println("Painting lines: " + linesAbove + " to " + (endLine-1));
TokenPainter painter = host.getTokenPainter();
int line = linesAbove;
//int count = 0;
while (y<clip.y+clip.height+ascent && line<lineCount) {
while (y < clip.y + clip.height + ascent && line < lineCount) {
Fold fold = fm.getFoldForLine(line);
Element lineElement = map.getElement(line);
int startOffset = lineElement.getStartOffset();
//int endOffset = (line==lineCount ? lineElement.getEndOffset()-1 :
// lineElement.getEndOffset()-1);
int endOffset = lineElement.getEndOffset()-1; // Why always "-1"?
int endOffset = lineElement.getEndOffset() - 1; // Why always "-1"?
h.paintLayeredHighlights(g2d, startOffset, endOffset,
a, host, this);
a, host, this);
// Paint a line of text.
token = document.getTokenListForLine(line);
if (!useSelectedTextColor || selStart==selEnd ||
(startOffset>=selEnd || endOffset<selStart)) {
drawLine(painter, token, g2d, x,y);
}
else {
if (!useSelectedTextColor || selStart == selEnd ||
(startOffset >= selEnd || endOffset < selStart)) {
drawLine(painter, token, g2d, x, y);
} else {
//System.out.println("Drawing line with selection: " + line);
drawLineWithSelection(painter,token,g2d, x,y, selStart, selEnd);
drawLineWithSelection(painter, token, g2d, x, y, selStart, selEnd);
}
if (fold!=null && fold.isCollapsed()) {
if (fold != null && fold.isCollapsed()) {
// Visible indicator of collapsed lines
Color c = RSyntaxUtilities.getFoldedLineBottomColor(host);
if (c!=null) {
if (c != null) {
g.setColor(c);
g.drawLine(x,y+lineHeight-ascent-1,
alloc.width,y+lineHeight-ascent-1);
g.drawLine(x, y + lineHeight - ascent - 1,
alloc.width, y + lineHeight - ascent - 1);
}
// Skip to next line to paint, taking extra care for lines with
// block ends and begins together, e.g. "} else {"
do {
int hiddenLineCount = fold.getLineCount();
if (hiddenLineCount==0) {
if (hiddenLineCount == 0) {
// Fold parser identified a zero-line fold region.
// This is really a bug, but we'll be graceful here
// and avoid an infinite loop.
@ -748,7 +755,7 @@ if (host.isCodeFoldingEnabled()) {
}
line += hiddenLineCount;
fold = fm.getFoldForLine(line);
} while (fold!=null && fold.isCollapsed());
} while (fold != null && fold.isCollapsed());
}
@ -767,7 +774,7 @@ if (host.isCodeFoldingEnabled()) {
* If the passed-in line is longer than the current longest line, then
* the longest line is updated.
*
* @param line The line to test against the current longest.
* @param line The line to test against the current longest.
* @param lineNumber The line number of the passed-in line.
* @return <code>true</code> iff the current longest line was updated.
*/
@ -787,8 +794,8 @@ if (host.isCodeFoldingEnabled()) {
* in a location that this view is responsible for.
*
* @param changes the change information from the associated document
* @param a the current allocation of the view
* @param f the factory to use to rebuild if the view has children
* @param a the current allocation of the view
* @param f the factory to use to rebuild if the view has children
*/
@Override
public void removeUpdate(DocumentEvent changes, Shape a, ViewFactory f) {
@ -806,9 +813,9 @@ if (host.isCodeFoldingEnabled()) {
/**
* Repaint the region of change covered by the given document
* event. Damages the line that begins the range to cover
* the case when the insert/remove is only on one line.
* If lines are added or removed, damages the whole
* view. The longest line is checked to see if it has
* the case when the insert/remove is only on one line.
* If lines are added or removed, damages the whole
* view. The longest line is checked to see if it has
* changed.
*/
protected void updateDamage(DocumentEvent changes, Shape a, ViewFactory f) {
@ -818,13 +825,13 @@ if (host.isCodeFoldingEnabled()) {
DocumentEvent.ElementChange ec = changes.getChange(elem);
Element[] added = (ec != null) ? ec.getChildrenAdded() : null;
Element[] removed = (ec != null) ? ec.getChildrenRemoved() : null;
if (((added != null) && (added.length > 0)) ||
((removed != null) && (removed.length > 0))) {
if (((added != null) && (added.length > 0)) ||
((removed != null) && (removed.length > 0))) {
// lines were added or removed...
if (added != null) {
int addedAt = ec.getIndex(); // FIXME: Is this correct?????
for (int i = 0; i < added.length; i++)
possiblyUpdateLongLine(added[i], addedAt+i);
possiblyUpdateLongLine(added[i], addedAt + i);
}
if (removed != null) {
for (int i = 0; i < removed.length; i++) {
@ -841,14 +848,12 @@ if (host.isCodeFoldingEnabled()) {
// This occurs when syntax highlighting only changes on lines
// (i.e. beginning a multiline comment).
else if (changes.getType()==DocumentEvent.EventType.CHANGE) {
else if (changes.getType() == DocumentEvent.EventType.CHANGE) {
//System.err.println("Updating the damage due to a CHANGE event...");
int startLine = changes.getOffset();
int endLine = changes.getLength();
damageLineRange(startLine,endLine, a, host);
}
else {
damageLineRange(startLine, endLine, a, host);
} else {
Element map = getElement();
int line = map.getElementIndex(changes.getOffset());
damageLineRange(line, line, a, host);
@ -861,20 +866,18 @@ if (host.isCodeFoldingEnabled()) {
// because it has gotten longer.
longLineWidth = getLineWidth(line);
preferenceChanged(null, true, false);
}
else {
} else {
// If long line gets updated, update the status bars too.
if (possiblyUpdateLongLine(e, line))
preferenceChanged(null, true, false);
}
}
else if (changes.getType() == DocumentEvent.EventType.REMOVE) {
} else if (changes.getType() == DocumentEvent.EventType.REMOVE) {
if (map.getElement(line) == longLine) {
// removed from longest line... recalc
longLineWidth = -1; // Must do this!
calculateLongestLine();
preferenceChanged(null, true, false);
}
}
}
}
}
@ -884,7 +887,7 @@ if (host.isCodeFoldingEnabled()) {
* Checks to see if the font metrics and longest line are up-to-date.
*/
private void updateMetrics() {
host = (RSyntaxTextArea)getContainer();
host = (RSyntaxTextArea) getContainer();
Font f = host.getFont();
if (font != f) {
// The font changed, we need to recalculate the longest line!
@ -900,9 +903,9 @@ if (host.isCodeFoldingEnabled()) {
*
* @param fx the X coordinate >= 0
* @param fy the Y coordinate >= 0
* @param a the allocated region to render into
* @param a the allocated region to render into
* @return the location within the model that best represents the
* given point in the view >= 0
* given point in the view >= 0
*/
@Override
public int viewToModel(float fx, float fy, Shape a, Position.Bias[] bias) {
@ -910,7 +913,7 @@ if (host.isCodeFoldingEnabled()) {
bias[0] = Position.Bias.Forward;
Rectangle alloc = a.getBounds();
RSyntaxDocument doc = (RSyntaxDocument)getDocument();
RSyntaxDocument doc = (RSyntaxDocument) getDocument();
int x = (int) fx;
int y = (int) fy;
@ -936,9 +939,9 @@ if (host.isCodeFoldingEnabled()) {
Element map = doc.getDefaultRootElement();
int lineIndex = Math.abs((y - alloc.y) / lineHeight);//metrics.getHeight() );
FoldManager fm = host.getFoldManager();
FoldManager fm = host.getFoldManager();
//System.out.print("--- " + lineIndex);
lineIndex += fm.getHiddenLineCountAbove(lineIndex, true);
lineIndex += fm.getHiddenLineCountAbove(lineIndex, true);
//System.out.println(" => " + lineIndex);
if (lineIndex >= map.getElementCount()) {
return host.getLastVisibleOffset();
@ -950,7 +953,7 @@ lineIndex += fm.getHiddenLineCountAbove(lineIndex, true);
if (x < alloc.x)
return line.getStartOffset();
// If the point is to the right of the line...
// If the point is to the right of the line...
else if (x > alloc.x + alloc.width)
return line.getEndOffset() - 1;
@ -960,14 +963,14 @@ lineIndex += fm.getHiddenLineCountAbove(lineIndex, true);
Token tokenList = doc.getTokenListForLine(lineIndex);
tabBase = alloc.x;
int offs = tokenList.getListOffset(
(RSyntaxTextArea)getContainer(),
this, tabBase, x);
return offs!=-1 ? offs : p0;
(RSyntaxTextArea) getContainer(),
this, tabBase, x);
return offs != -1 ? offs : p0;
}
} // End of else.
}
}
/**
@ -981,11 +984,13 @@ lineIndex += fm.getHiddenLineCountAbove(lineIndex, true);
// NOTE: lineHeight is not initially set here, leading to the
// current line not being highlighted when a document is first
// opened. So, we set it here just in case.
lineHeight = host!=null ? host.getLineHeight() : lineHeight;
FoldManager fm = host.getFoldManager();
if (!fm.isLineHidden(line)) {
line -= fm.getHiddenLineCountAbove(line);
return alloc.y + line*lineHeight;
lineHeight = host != null ? host.getLineHeight() : lineHeight;
if (host != null) {
FoldManager fm = host.getFoldManager();
if (!fm.isLineHidden(line)) {
line -= fm.getHiddenLineCountAbove(line);
return alloc.y + line * lineHeight;
}
}
}
@ -998,7 +1003,7 @@ lineIndex += fm.getHiddenLineCountAbove(lineIndex, true);
* {@inheritDoc}
*/
public int yForLineContaining(Rectangle alloc, int offs)
throws BadLocationException {
throws BadLocationException {
Element map = getElement();
int line = map.getElementIndex(offs);
return yForLine(alloc, line);

145
designer-base/src/main/java/com/fr/design/gui/syntax/ui/rsyntaxtextarea/WrappedSyntaxView.java

@ -3,21 +3,39 @@
*
* WrappedSyntaxView.java - Test implementation of WrappedSyntaxView that
* is also aware of RSyntaxTextArea's different fonts per token type.
*
*
* This library is distributed under a modified BSD license. See the included
* RSyntaxTextArea.License.txt file for details.
*/
package com.fr.design.gui.syntax.ui.rsyntaxtextarea;
import java.awt.*;
import javax.swing.text.*;
import javax.swing.text.Position.Bias;
import javax.swing.event.*;
import com.fr.design.gui.syntax.ui.rsyntaxtextarea.TokenUtils.TokenSubList;
import com.fr.design.gui.syntax.ui.rsyntaxtextarea.folding.Fold;
import com.fr.design.gui.syntax.ui.rsyntaxtextarea.folding.FoldManager;
import com.fr.design.gui.syntax.ui.rtextarea.Gutter;
import com.fr.stable.CommonUtils;
import javax.swing.event.DocumentEvent;
import javax.swing.text.BadLocationException;
import javax.swing.text.BoxView;
import javax.swing.text.Document;
import javax.swing.text.Element;
import javax.swing.text.LayeredHighlighter;
import javax.swing.text.PlainDocument;
import javax.swing.text.Position;
import javax.swing.text.Position.Bias;
import javax.swing.text.Segment;
import javax.swing.text.TabExpander;
import javax.swing.text.View;
import javax.swing.text.ViewFactory;
import java.awt.Color;
import java.awt.Component;
import java.awt.Font;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.Shape;
/**
@ -27,17 +45,17 @@ import com.fr.design.gui.syntax.ui.rtextarea.Gutter;
* @version 0.2
*/
public class WrappedSyntaxView extends BoxView implements TabExpander,
RSTAView {
RSTAView {
boolean widthChanging;
int tabBase;
int tabSize;
/**
* This is reused to keep from allocating/deallocating.
*/
private Segment s, drawSeg;
/**
* Another variable initialized once to keep from allocating/deallocating.
*/
@ -93,7 +111,7 @@ public class WrappedSyntaxView extends BoxView implements TabExpander,
int p = p0;
RSyntaxTextArea textArea = (RSyntaxTextArea)getContainer();
float currentWidth = getWidth();
if (currentWidth==Integer.MAX_VALUE)
if (CommonUtils.equals(currentWidth, Integer.MAX_VALUE))
currentWidth = getPreferredSpan(X_AXIS);
// Make sure width>0; this is a huge hack to fix a bug where
// loading text into an RTextArea before it is visible if word wrap
@ -128,7 +146,7 @@ public class WrappedSyntaxView extends BoxView implements TabExpander,
//System.err.println("------ ending calculateBreakPosition() --------");
// return p;
return p + 1;
return p + 1;
}
//private int getBreakLocation(Token t, FontMetrics fm, int x0, int x,
@ -229,7 +247,7 @@ return p + 1;
x = painter.paint(token, g, x,y, host, this);
token = token.getNextToken();
}
if (token!=null && token.isPaintable() && token.getOffset()<p) {
int tokenOffset = token.getOffset();
tempToken.set(drawSeg.array, tokenOffset-start, p-1-start,
@ -242,7 +260,7 @@ return p + 1;
p0 = (p==p0) ? p1 : p;
y += fontHeight;
} // End of while (token!=null && token.isPaintable()).
// NOTE: We should re-use code from Token (paintBackground()) here,
@ -271,8 +289,8 @@ return p + 1;
* @param selEnd The end of the selection.
*/
protected void drawViewWithSelection(TokenPainter painter, Graphics2D g,
Rectangle r, View view, int fontHeight, int y, int selStart,
int selEnd) {
Rectangle r, View view, int fontHeight, int y, int selStart,
int selEnd) {
float x = r.x;
@ -371,7 +389,7 @@ return p + 1;
int tokenOffset = token.getOffset();
Token orig = token;
token = new TokenImpl(drawSeg, tokenOffset-start, p-1-start,
tokenOffset, token.getType());
tokenOffset, token.getType());
// Selection starts in this token
if (token.containsPosition(selStart)) {
@ -432,7 +450,7 @@ return p + 1;
p0 = (p==p0) ? p1 : p;
y += fontHeight;
} // End of while (token!=null && token.isPaintable()).
// NOTE: We should re-use code from Token (paintBackground()) here,
@ -449,7 +467,7 @@ return p + 1;
/**
* Fetches the allocation for the given child view.<p>
* Overridden to account for code folding.
*
*
* @param index The index of the child, >= 0 && < getViewCount().
* @param a The allocation to this view
* @return The allocation to the child; or <code>null</code> if
@ -476,7 +494,7 @@ return p + 1;
/**
* Fetches the allocation for the given child view to render into.<p>
* Overridden to account for lines hidden by collapsed folded regions.
*
*
* @param line The index of the child, >= 0 && < getViewCount()
* @param a The allocation to this view
* @return The allocation to the child
@ -515,7 +533,7 @@ return p + 1;
* @param axis may be either View.X_AXIS or View.Y_AXIS
* @return the span the view would like to be rendered into.
* Typically the view is told to render into the span
* that is returned, although there is no guarantee.
* that is returned, although there is no guarantee.
* The parent may choose to resize or break the view.
* @see View#getMaximumSpan
*/
@ -541,7 +559,7 @@ return p + 1;
* @param axis may be either View.X_AXIS or View.Y_AXIS
* @return the span the view would like to be rendered into.
* Typically the view is told to render into the span
* that is returned, although there is no guarantee.
* that is returned, although there is no guarantee.
* The parent may choose to resize or break the view.
* @see View#getMinimumSpan
*/
@ -567,7 +585,7 @@ return p + 1;
* @param axis may be either View.X_AXIS or View.Y_AXIS
* @return the span the view would like to be rendered into.
* Typically the view is told to render into the span
* that is returned, although there is no guarantee.
* that is returned, although there is no guarantee.
* The parent may choose to resize or break the view.
* @see View#getPreferredSpan
*/
@ -605,7 +623,7 @@ return p + 1;
*/
protected int getTabSize() {
Integer i = (Integer) getDocument().
getProperty(PlainDocument.tabSizeAttribute);
getProperty(PlainDocument.tabSizeAttribute);
int size = (i != null) ? i.intValue() : 5;
return size;
}
@ -643,7 +661,7 @@ return p + 1;
/**
* Gives notification that something was inserted into the
* Gives notification that something was inserted into the
* document in a location that this view is responsible for.
* This is implemented to simply update the children.
*
@ -655,8 +673,8 @@ return p + 1;
@Override
public void insertUpdate(DocumentEvent changes, Shape a, ViewFactory f) {
updateChildren(changes, a);
Rectangle alloc = ((a != null) && isAllocationValid()) ?
getInsideAllocation(a) : null;
Rectangle alloc = ((a != null) && isAllocationValid()) ?
getInsideAllocation(a) : null;
int pos = changes.getOffset();
View v = getViewAtPosition(pos, alloc);
if (v != null)
@ -669,7 +687,7 @@ return p + 1;
* This is called by the <code>setParent</code> method.
* Subclasses can re-implement this to initialize their
* child views in a different manner. The default
* implementation creates a child view for each
* implementation creates a child view for each
* child element.
*
* @param f the view factory
@ -765,8 +783,8 @@ return p + 1;
*/
@Override
public Shape modelToView(int p0, Position.Bias b0,
int p1, Position.Bias b1,
Shape a) throws BadLocationException {
int p1, Position.Bias b1,
Shape a) throws BadLocationException {
Shape s0 = modelToView(p0, a, b0);
Shape s1;
@ -779,9 +797,9 @@ return p + 1;
if (s1 == null) {
// Assume extends left to right.
Rectangle alloc = (a instanceof Rectangle) ? (Rectangle)a :
a.getBounds();
a.getBounds();
s1 = new Rectangle(alloc.x + alloc.width - 1, alloc.y,
1, alloc.height);
1, alloc.height);
}
}
else {
@ -789,11 +807,11 @@ return p + 1;
}
Rectangle r0 = s0.getBounds();
Rectangle r1 = (s1 instanceof Rectangle) ? (Rectangle) s1 :
s1.getBounds();
s1.getBounds();
if (r0.y != r1.y) {
// If it spans lines, force it to be the width of the view.
Rectangle alloc = (a instanceof Rectangle) ? (Rectangle)a :
a.getBounds();
a.getBounds();
r0.x = alloc.x;
r0.width = alloc.width;
}
@ -840,7 +858,7 @@ return p + 1;
public void paint(Graphics g, Shape a) {
Rectangle alloc = (a instanceof Rectangle) ?
(Rectangle)a : a.getBounds();
(Rectangle)a : a.getBounds();
tabBase = alloc.x;
Graphics2D g2d = (Graphics2D)g;
@ -904,7 +922,7 @@ return p + 1;
/**
* Gives notification that something was removed from the
* Gives notification that something was removed from the
* document in a location that this view is responsible for.
* This is implemented to simply update the children.
*
@ -918,12 +936,12 @@ return p + 1;
updateChildren(changes, a);
Rectangle alloc = ((a != null) && isAllocationValid()) ?
getInsideAllocation(a) : null;
Rectangle alloc = ((a != null) && isAllocationValid()) ?
getInsideAllocation(a) : null;
int pos = changes.getOffset();
View v = getViewAtPosition(pos, alloc);
if (v != null)
v.removeUpdate(changes, alloc, f);
v.removeUpdate(changes, alloc, f);
}
@ -972,7 +990,7 @@ return p + 1;
/**
* Update the child views in response to a
* Update the child views in response to a
* document event.
*/
void updateChildren(DocumentEvent e, Shape a) {
@ -1044,8 +1062,8 @@ return p + 1;
// Code folding may have hidden the last line. If so, return the last
// visible offset instead of the last offset.
if (host.isCodeFoldingEnabled() && v==getView(getViewCount()-1) &&
offs==v.getEndOffset()-1) {
if (v != null && host.isCodeFoldingEnabled() && v == getView(getViewCount() - 1) &&
offs == v.getEndOffset() - 1) {
offs = host.getLastVisibleOffset();
}
@ -1068,7 +1086,7 @@ return p + 1;
* {@inheritDoc}
*/
public int yForLineContaining(Rectangle alloc, int offs)
throws BadLocationException {
throws BadLocationException {
if (isAllocationValid()) {
// TODO: make cached Y_AXIS offsets valid even with folding enabled
// to speed this back up!
@ -1091,8 +1109,8 @@ return p + 1;
/**
* Simple view of a line that wraps if it doesn't
* fit within the horizontal space allocated.
* This class tries to be lightweight by carrying little
* state of it's own and sharing the state of the outer class
* This class tries to be lightweight by carrying little
* state of it's own and sharing the state of the outer class
* with it's siblings.
*/
class WrappedLine extends View {
@ -1136,10 +1154,10 @@ return p + 1;
//System.err.println("... ... ... break position p==" + p);
p0 = (p == p0) ? ++p : p; // this is the fix of #4410243
// we check on situation when
// width is too small and
// break position is calculated
// incorrectly.
// we check on situation when
// width is too small and
// break position is calculated
// incorrectly.
//System.err.println("... ... ... new p0==" + p0);
}
/*
@ -1161,7 +1179,7 @@ System.err.println(">>> >>> calculated number of lines for this view (line " + l
* @param axis may be either X_AXIS or Y_AXIS
* @return the span the view would like to be rendered into.
* Typically the view is told to render into the span
* that is returned, although there is no guarantee.
* that is returned, although there is no guarantee.
* The parent may choose to resize or break the view.
* @see View#getPreferredSpan
*/
@ -1170,7 +1188,7 @@ System.err.println(">>> >>> calculated number of lines for this view (line " + l
switch (axis) {
case View.X_AXIS:
float width = getWidth();
if (width == Integer.MAX_VALUE) {
if (CommonUtils.equals(width, Integer.MAX_VALUE)) {
// We have been initially set to MAX_VALUE, but we don't
// want this as our preferred.
return 100f;
@ -1212,7 +1230,7 @@ System.err.println(">>> >>> calculated number of lines for this view (line " + l
*/
@Override
public Shape modelToView(int pos, Shape a, Position.Bias b)
throws BadLocationException {
throws BadLocationException {
//System.err.println("--- begin modelToView ---");
Rectangle alloc = a.getBounds();
@ -1222,7 +1240,7 @@ System.err.println(">>> >>> calculated number of lines for this view (line " + l
int p0 = getStartOffset();
int p1 = getEndOffset();
int testP = (b == Position.Bias.Forward) ? pos :
Math.max(p0, pos - 1);
Math.max(p0, pos - 1);
// Get the token list for this line so we don't have to keep
// recomputing it if this logical line spans multiple physical
@ -1242,9 +1260,9 @@ System.err.println(">>> >>> calculated number of lines for this view (line " + l
if ((pos >= p0) && (testP<p)) {//pos < p)) {
// it's in this line
alloc = RSyntaxUtilities.getLineWidthUpTo(
textArea, s, p0, pos,
WrappedSyntaxView.this,
alloc, alloc.x);
textArea, s, p0, pos,
WrappedSyntaxView.this,
alloc, alloc.x);
//System.err.println("--- end modelToView ---");
return alloc;
}
@ -1253,9 +1271,9 @@ System.err.println(">>> >>> calculated number of lines for this view (line " + l
// Wants end.
if (pos > p0) {
alloc = RSyntaxUtilities.getLineWidthUpTo(
textArea, s, p0, pos,
WrappedSyntaxView.this,
alloc, alloc.x);
textArea, s, p0, pos,
WrappedSyntaxView.this,
alloc, alloc.x);
}
//System.err.println("--- end modelToView ---");
return alloc;
@ -1351,14 +1369,9 @@ System.err.println(">>> >>> calculated number of lines for this view (line " + l
// Start at alloc.x since this chunk starts
// at the beginning of a physical line.
if (tlist == null) {
p0 = (p == p0) ? p1 : p;
alloc.y += alloc.height;
continue;
}
int n = tlist.getListOffset(textArea,
WrappedSyntaxView.this,
alloc.x, x);
WrappedSyntaxView.this,
alloc.x, x);
// NOTE: We needed to add the max() with
// p0 as getTokenListForLine returns -1
@ -1384,7 +1397,7 @@ System.err.println(">>> >>> calculated number of lines for this view (line " + l
}
private void handleDocumentEvent(DocumentEvent e, Shape a,
ViewFactory f) {
ViewFactory f) {
int n = calculateLineCount();
if (this.nlines != n) {
this.nlines = n;

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