Pull request #477: REPORT-34112 HTML解析：table标签支持table-layout 中的fixed 布局

Merge in CORE/base-third from ~HUGH.C/base-third:feature/10.0 to feature/10.0

* commit '71ad6c59cf5b9756de8aa09354d04d0d15f297cd':
  REPORT-34112 review 改进
  REPORT-34112 改进
  REPORT-34112 去除无用字段
  REPORT-34112 改进
  REPORT-34112 HTML解析：table标签支持table-layout 中的fixed 布局

fine-itext/src/main/java/com/fr/third/v2/lowagie/text/html/simpleparser/IncCell.java

@@ -107,6 +107,7 @@ public class IncCell implements TextElementArray {
         //解析td上声明的width
         value = props.getLastChainProperty("width");
         if (value != null) {
+            cell.setOriginalStyleWidth(value);
             cell.setStyleWidth(CSSUtils.parseFloat(value));
         }
         //解析td上声明的height

fine-itext/src/main/java/com/fr/third/v2/lowagie/text/html/simpleparser/IncTable.java

@@ -110,19 +110,18 @@ public class IncTable {
     public PdfPTable buildTable() {
         if (rows.isEmpty())
             return new PdfPTable(1);
-        int ncol = 0;
         ArrayList c0 = (ArrayList) rows.get(0);
 
-        for (int k = 0; k < c0.size(); ++k) {
+        List<String> firstLineColWidths = getFirstLineColWidths();
-            ncol += ((PdfPCell) c0.get(k)).getColspan();
-        }
 
+        int ncol = getMaxColCount();
         processColWidth(ncol);
 
         PdfPTable table = new PdfPTable(ncol);
         try {
             TableProperties tableProperties = parseTableProperties();
             table.setTableProperties(tableProperties);
+            table.setFirstLineColWidths(firstLineColWidths);
 
             //相对宽度
             float[] floats = new float[relativeColWidths.size()];
@@ -149,18 +148,69 @@ public class IncTable {
             }
             for (int row = 0; row < rows.size(); ++row) {
                 ArrayList col = (ArrayList) rows.get(row);
+                int colCount=0;
                 for (int k = 0; k < col.size(); ++k) {
                     table.addCell((PdfPCell) col.get(k));
+                    colCount += ((PdfPCell) col.get(k)).getColspan();
+                }
+                //补充空白列
+                for (int i = 0; i < ncol - colCount; i++) {
+                    PdfPCell pdfPCell = new PdfPCell();
+                    pdfPCell.setInvalid(true);
+                    table.addCell(pdfPCell);
                 }
             }
-
             processRowHeight(table);
+            table.adjustFixedLayoutColumnWidth();
         }catch (Exception e){
             e.printStackTrace();
         }
         return table;
     }
 
+    /**
+     * 获取第一行的列宽
+     *
+     * @return
+     */
+    private List<String> getFirstLineColWidths() {
+        ArrayList c0 = (ArrayList) rows.get(0);
+        List<String> firstLineColWidths = new ArrayList<String>();
+        for (int i = 0; i < c0.size(); i++) {
+            PdfPCell pdfPCell = (PdfPCell) c0.get(i);
+            String width = pdfPCell.getOriginalStyleWidth();
+            if (null != width && 1 < pdfPCell.getColspan()) {
+                float w = CSSUtils.parseFloat(width);
+                //平分且需要保持原始的样式（有百分号的需要加上百分百）
+                w /= pdfPCell.getColspan();
+                width = width.endsWith("%") ? String.valueOf(w) + "%" : String.valueOf(w);
+            }
+            for (int j = 0; j < pdfPCell.getColspan(); j++) {
+                firstLineColWidths.add(width);
+            }
+        }
+        return firstLineColWidths;
+    }
+
+    /**
+     * 获取最大列数
+     *
+     * @return
+     */
+    public int getMaxColCount() {
+        int max = 0;
+        for (int row = 0; row < rows.size(); ++row) {
+            ArrayList col = (ArrayList) rows.get(row);
+            int ncol = 0;
+            for (int k = 0; k < col.size(); ++k) {
+                ncol += ((PdfPCell) col.get(k)).getColspan();
+            }
+            max = Math.max(ncol, max);
+        }
+        return max;
+    }
+
+
     /**
      * 调整列宽，每列取最大值
      *
@@ -290,6 +340,15 @@ public class IncTable {
         if(value != null){
             tableProperties.setCellpadding(CSSUtils.parseFloat(value));
         }
+        value = (String) props.get("width");
+        if (value != null) {
+            tableProperties.setStyleWidth(value);
+        }
+        value = (String) props.get("table-layout");
+        if (value != null) {
+            tableProperties.setLayout(value);
+        }
+
         ChainedProperties properties = new ChainedProperties();
         properties.addToChain(HtmlTags.TABLE, props);
         //解析background相关属性

fine-itext/src/main/java/com/fr/third/v2/lowagie/text/pdf/PdfPCell.java

@@ -71,6 +71,8 @@ public class PdfPCell extends Rectangle {
     private float styleWidth = 0.0f;
     private float styleHeight = 0.0f;
 
+    private String originalStyleWidth;
+
     public float getStyleHeight() {
         return styleHeight;
     }
@@ -85,6 +87,8 @@ public class PdfPCell extends Rectangle {
 
     public Map<String, String> background ;
 
+    private boolean invalid = false;
+
     public Map<String, String>  getBackground() {
         return background;
     }
@@ -97,6 +101,21 @@ public class PdfPCell extends Rectangle {
         this.styleWidth = styleWidth;
     }
 
+    public String getOriginalStyleWidth() {
+        return originalStyleWidth;
+    }
+
+    public void setOriginalStyleWidth(String originalStyleWidth) {
+        this.originalStyleWidth = originalStyleWidth;
+    }
+
+    public boolean isInvalid() {
+        return invalid;
+    }
+
+    public void setInvalid(boolean invalid) {
+        this.invalid = invalid;
+    }
 
     private ColumnText column = new ColumnText(null);
     
@@ -291,6 +310,7 @@ public class PdfPCell extends Rectangle {
         background = cell.background;
         styleWidth = cell.styleWidth;
         styleHeight = cell.styleHeight;
+        invalid=cell.invalid;
     }
     
     /**

fine-itext/src/main/java/com/fr/third/v2/lowagie/text/pdf/PdfPRow.java

@@ -141,7 +141,7 @@ public class PdfPRow {
 	 * @param widths
 	 * @return true if everything went right
 	 */
-	public boolean setWidths(float widths[]) {
+	public boolean setWidths(float widths[], TableProperties tablePropertie) {
 		if (widths.length != cells.length)
 			return false;
 		System.arraycopy(widths, 0, this.widths, 0, cells.length);
@@ -160,6 +160,19 @@ public class PdfPRow {
 			for (; k < last; ++k)
 				total += widths[k];
 			--k;
+			float borderWidth=0;
+			float cellspacing=0;
+			float cellpadding=0;
+			if (null != tablePropertie) {
+				borderWidth = tablePropertie.getBorderWidth();
+				cellspacing = tablePropertie.getCellspacing();
+				cellpadding = tablePropertie.getCellpadding();
+			}
+			if (cell.getColspan() > 1) {
+				total += ((cell.getColspan() - 1) * 2 * borderWidth);
+				total += ((cell.getColspan() - 1) * cellspacing);
+				total += ((cell.getColspan() - 1) * 2 * cellpadding);
+			}
 			cell.setRight(total);
 			cell.setTop(0);
 			processColWidth(cell.getColumn().getCompositeElements(), cell.getWidth());

fine-itext/src/main/java/com/fr/third/v2/lowagie/text/pdf/PdfPTable.java

@@ -49,6 +49,8 @@
 
 package com.fr.third.v2.lowagie.text.pdf;
 
+import com.fr.third.v2.lowagie.text.html.CSS;
+import com.fr.third.v2.lowagie.text.html.CSSUtils;
 import java.util.ArrayList;
 
 import com.fr.third.v2.lowagie.text.DocumentException;
@@ -59,6 +61,7 @@ import com.fr.third.v2.lowagie.text.Image;
 import com.fr.third.v2.lowagie.text.Phrase;
 import com.fr.third.v2.lowagie.text.Rectangle;
 import com.fr.third.v2.lowagie.text.pdf.events.PdfPTableEventForwarder;
+import java.util.List;
 
 /**
  * This is a table that can be put at an absolute position but can also
@@ -105,6 +108,8 @@ public class PdfPTable implements LargeElement {
     protected PdfPTableEvent tableEvent;
     private TableProperties tableProperties;
 
+    private List<String> firstLineColWidths;
+
     public TableProperties getTableProperties() {
         return tableProperties;
     }
@@ -113,6 +118,10 @@ public class PdfPTable implements LargeElement {
         this.tableProperties = tableProperties;
     }
 
+    public void setFirstLineColWidths(List<String> firstLineColWidths) {
+        this.firstLineColWidths = firstLineColWidths;
+    }
+
     /**
      * Holds value of property headerRows.
      */
@@ -369,12 +378,244 @@ public class PdfPTable implements LargeElement {
             return;
         this.totalWidth = totalWidth;
         totalHeight = 0;
+        if (adjustFixedLayoutColumnWidth()) {
+            return;
+        }
         calculateWidths();
 //        calculateHeights(true);
+        adjustRowWidth();
+    }
+
+    private void adjustRowWidth() {
         for (int k = 0; k < rows.size(); ++k) {
             PdfPRow row = (PdfPRow) rows.get(k);
-            row.setWidths(absoluteWidths);
+            row.setWidths(absoluteWidths, tableProperties);
+        }
+    }
+
+    /**
+     * 计算非内容区域的宽度（边框+cellpadding+cellspacing）
+     *
+     * @return
+     */
+    private float calOutOfContentWidth() {
+        int numCols = getNumberOfColumns();
+        float allCellspacingWidth = tableProperties.getCellspacing() * (numCols + 1);
+        float allCellpaddingWidth = numCols * 2 * tableProperties.getCellpadding();
+        float allCellBorderWidth = (numCols + 1) * 2 * tableProperties.getBorderWidth();
+        return allCellspacingWidth + allCellpaddingWidth + allCellBorderWidth;
+    }
+
+    /**
+     * 调整固定布局(table-layout:fixed )的列宽
+     *
+     * @return false : 不符合table-layout:fixed 的定义
+     */
+    public boolean adjustFixedLayoutColumnWidth() {
+        if (!needFixedLayout()) {
+            return false;
+        }
+        //是fixed 布局 且设置了width(仅设置 table-layout:fixed 而不设置width 时 前台依旧使用的是auto 布局)
+
+        //内容区域外的宽度
+        float outOfContentWidth = calOutOfContentWidth();
+        //实际内容宽度
+        float contentWidth = totalWidth - outOfContentWidth;
+
+        //重新初始化一下
+        absoluteWidths = new float[relativeWidths.length];
+
+        if (dealFirstLineHasNoWidth(contentWidth)) {
+            adjustRowWidth();
+            return true;
+        }
+
+        //第一行列宽
+        float[] colWidths = new float[firstLineColWidths.size()];
+        //绝对宽度和
+        float absWidthSum = 0;
+        //相对宽度和
+        float relWidthSum = 0;
+        //绝对宽度 （如 10px） 的索引
+        ArrayList<Integer> absIndex = new ArrayList<Integer>();
+        //相对宽度 （如 10%） 的索引
+        ArrayList<Integer> relIndex = new ArrayList<Integer>();
+
+        //初始化一下上述字段
+        for (int i = 0; i < firstLineColWidths.size(); i++) {
+            String widthStr = firstLineColWidths.get(i);
+            float w = CSSUtils.parseFloat(widthStr);
+            if (null != widthStr) {
+                if (widthStr.endsWith("%")) {
+                    w = w / 100 * contentWidth;
+                    relWidthSum += w;
+                    relIndex.add(i);
+                } else {
+                    absWidthSum += w;
+                    absIndex.add(i);
+                }
+            }
+            colWidths[i] = w;
+        }
+
+        //第一行td中指定的绝对宽度 >= table标签上指定的宽度，以td的宽度为准，将table撑开
+        if (absWidthSum >= contentWidth) {
+            for (int i = 0; i < absIndex.size(); i++) {
+                absoluteWidths[absIndex.get(i)] = colWidths[absIndex.get(i)];
+            }
+            totalWidth = outOfContentWidth + absWidthSum;
+            dealInvalidCell(absIndex);
+            adjustRowWidth();
+            return true;
+        }
+
+        //table 总的列数
+        int colNum = getNumberOfColumns();
+        //相对宽度与绝对宽度的列数和
+        int absAndRelColNum = absIndex.size() + relIndex.size();
+        //相对宽度与绝对宽度的列宽和
+        float absAndRelColWidthSum = absWidthSum + relWidthSum;
+
+        //第一行td中指定的绝对宽度+相对宽度小于table内容宽度
+        if (absAndRelColWidthSum < contentWidth) {
+            //剩余宽度
+            float remaindWidth = contentWidth - absAndRelColWidthSum;
+            //如果总列数大于第一行绝对宽度和相对宽度列数，则多余的宽度由剩余列平分
+            if (colNum > absAndRelColNum) {
+                fillAbsoluteWidths(colWidths, absIndex);
+                fillAbsoluteWidths(colWidths, relIndex);
+                float remaindAvgWidth = remaindWidth / (colNum - absAndRelColNum);
+                for (int i = 0; i < absoluteWidths.length; i++) {
+                    if (absIndex.contains(i) || relIndex.contains(i)) {
+                        continue;
+                    }
+                    absoluteWidths[i] = remaindAvgWidth;
+                }
+            } else {
+                //按比例分摊剩余宽度
+                for (int i = 0; i < absIndex.size(); i++) {
+                    float width = colWidths[absIndex.get(i)];
+                    absoluteWidths[absIndex.get(i)] = width + remaindWidth * width / absAndRelColWidthSum;
+                }
+                for (int i = 0; i < relIndex.size(); i++) {
+                    float width = colWidths[relIndex.get(i)];
+                    absoluteWidths[relIndex.get(i)] = width + remaindWidth * width / absAndRelColWidthSum;
+                }
+            }
+
+        } else {
+            //第一行td中指定的绝对宽度+相对宽度大于table标签上指定的宽度，剩余宽度由相对宽度平分
+            fillAbsoluteWidths(colWidths, absIndex);
+            //剩余宽度
+            float remaindWidth = contentWidth - absWidthSum;
+            for (int i = 0; i < relIndex.size(); i++) {
+                float width = colWidths[relIndex.get(i)];
+                absoluteWidths[relIndex.get(i)] = remaindWidth * width / relWidthSum;
             }
+            dealInvalidCell(absIndex, relIndex);
+        }
+        adjustRowWidth();
+        return true;
+    }
+
+    private boolean needFixedLayout() {
+        return totalWidth > 0 && rows.size() > 0 && CSS.Value.FIXED.equals(tableProperties.getLayout()) && null != tableProperties.getStyleWidth();
+    }
+
+    /**
+     * 获取列索引List
+     */
+    public List<Integer> getColIndexList() {
+        List<Integer> list = new ArrayList<>(absoluteWidths.length);
+        for (int i = 0; i < absoluteWidths.length; i++) {
+            list.add(i);
+        }
+        return list;
+    }
+
+    /**
+     * 填充最终宽度
+     *
+     * @param colWidths 列宽
+     * @param indexList 要设置的列索引List
+     */
+    private void fillAbsoluteWidths(float[] colWidths, ArrayList<Integer> indexList) {
+        for (int i = 0; i < indexList.size() && indexList.get(i) < absoluteWidths.length; i++) {
+            Integer index = indexList.get(i);
+            absoluteWidths[index] = colWidths[index];
+        }
+    }
+
+    /**
+     * validIndexList 之外的列对应的单元格设置为无效的
+     *
+     * @param validIndexList
+     */
+    private void dealInvalidCell(List<Integer>... validIndexList) {
+        if (null == validIndexList) {
+            return;
+        }
+        //计算无效列索引
+        List<Integer> invalidIndexList = getColIndexList();
+
+        List<Integer> list = new ArrayList<Integer>();
+        for (List<Integer> item : validIndexList) {
+            list.addAll(item);
+        }
+        invalidIndexList.removeAll(list);
+        for (int row = 0; row < rows.size(); row++) {
+            PdfPRow pdfRow = (PdfPRow) rows.get(row);
+            int index = 0;
+            PdfPCell[] cells = pdfRow.getCells();
+            for (PdfPCell cell : cells) {
+                if (cell == null) {
+                    index += 1;
+                    continue;
+                }
+                if (invalidIndexList.contains(index)) {
+                    cell.setInvalid(true);
+                }
+                index += cell.getColspan();
+            }
+        }
+        //将无效列的多余宽度平分给其他列
+        dealInvalidColWidth(invalidIndexList.size(), list);
+    }
+
+    /**
+     * 处理无效列的内容区域外的宽度（平分给其他列）
+     *
+     * @param invalidColNum
+     * @param validIndexList
+     */
+    private void dealInvalidColWidth(int invalidColNum, List<Integer> validIndexList) {
+        if (0 == invalidColNum || null == validIndexList || 0 == validIndexList.size()) {
+            return;
+        }
+        float invalidColWidth = invalidColNum * tableProperties.getCellspacing() + 2 * invalidColNum * (tableProperties.getCellpadding() + tableProperties.getBorderWidth());
+        float avgWidth = invalidColWidth / validIndexList.size();
+        for (int i = 0; i < validIndexList.size() && validIndexList.get(i) < absoluteWidths.length; i++) {
+            Integer index = validIndexList.get(i);
+            absoluteWidths[index] += avgWidth;
+        }
+    }
+
+    /**
+     * 处理第一行没有设置width属性情况
+     *
+     * @param contentWidth 内容宽度
+     * @return
+     */
+    private boolean dealFirstLineHasNoWidth(float contentWidth) {
+        if (null != firstLineColWidths && 0 != firstLineColWidths.size()) {
+            return false;
+        }
+        //第一行的td都没有设置width属性，则所有列平分table宽度
+        int length = absoluteWidths.length;
+        for (int i = 0; i < length; i++) {
+            absoluteWidths[i] = contentWidth / length;
+        }
+        return true;
     }
 
     /**
@@ -509,7 +750,7 @@ public class PdfPTable implements LargeElement {
             }
             PdfPRow row = new PdfPRow(currentRow);
             if (totalWidth > 0) {
-                row.setWidths(absoluteWidths);
+                row.setWidths(absoluteWidths, tableProperties);
 //                totalHeight += row.getMaxHeights();
             }
             rows.add(row);
@@ -876,7 +1117,7 @@ public class PdfPTable implements LargeElement {
         if (row == null)
             return 0;
         if (firsttime)
-            row.setWidths(absoluteWidths);
+            row.setWidths(absoluteWidths, tableProperties);
         float height = row.getMaxHeights();
         PdfPCell cell;
         PdfPRow tmprow;

fine-itext/src/main/java/com/fr/third/v2/lowagie/text/pdf/TableProperties.java

@@ -11,7 +11,11 @@ public class TableProperties {
     private float cellspacing = 2.0f;
     private float cellpadding = 1.0f;
     private boolean collapse = false;
+
     public Map<String, String> background;
+    private String styleWidth = null;
+
+    private String layout = null;
 
     public BorderStyle getBorderStyle() {
         return borderStyle;
@@ -57,6 +61,22 @@ public class TableProperties {
         this.background = background;
     }
 
+    public String getStyleWidth() {
+        return styleWidth;
+    }
+
+    public void setStyleWidth(String styleWidth) {
+        this.styleWidth = styleWidth;
+    }
+
+    public String getLayout() {
+        return layout;
+    }
+
+    public void setLayout(String layout) {
+        this.layout = layout;
+    }
+
     public String toHtmlString(){
         StringBuffer sb = new StringBuffer();
         if(!isCollapse()){