Merge pull request #394 in CORE/base-third from ~HUGH.C/base-third:release/10.0 to release/10.0

* commit 'a729047e40e027101c0afd94f37b9dbb9def5f62':
  REPORT-27948  改进
  REPORT-27948 上标标签sup，导出PDF文字与正常文本重叠
  REPORT-27948 上标标签sup，导出PDF文字与正常文本重叠

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

@@ -97,6 +97,8 @@ public class PdfChunk {
 
     private boolean breakTag = false;
 
+    public final static float SUB_PERCENT = 5f/6;
+
     public float getHeight() {
         return height;
     }
@@ -254,9 +256,7 @@ public class PdfChunk {
         // italic simulation
         if ((style & Font.ITALIC) != 0)
             attributes.put(Chunk.SKEW, new float[]{0, ITALIC_ANGLE});
-        FontMetrics metrics = FontDesignMetrics.getMetrics(new java.awt.Font(f.getFontName(), f.getStyle(), (int) (f.getSize() * FONT_SCALE)));
-        font = new PdfFont(f, f.getSize());
-        height = metrics.getHeight() / FONT_SCALE + indent.getTop() + indent.getBottom();
+
         // other style possibilities
         HashMap attr = chunk.getAttributes();
         if (attr != null) {
@@ -274,6 +274,11 @@ public class PdfChunk {
                 attributes.put(Chunk.GENERICTAG, chunk.getContent());
             }
         }
+        //考虑下上下标
+        int fontSize = (int) (f.getSize() * FONT_SCALE * (getTextRise() != 0 ? SUB_PERCENT : 1));
+        FontMetrics metrics = FontDesignMetrics.getMetrics(new java.awt.Font(f.getFontName(), f.getStyle(), fontSize));
+        font = new PdfFont(f, f.getSize());
+        height = metrics.getHeight() / FONT_SCALE + indent.getTop() + indent.getBottom();
         if (f.isUnderlined()) {
             Object obj[] = {null, new float[]{0, 1f / 15, 0, -1f / 3, 0}};
             Object unders[][] = Utilities.addToArray((Object[][])attributes.get(Chunk.UNDERLINE), obj);

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

@@ -67,7 +67,16 @@ public class PdfLine {
     
     /** The arraylist containing the chunks. */
     protected ArrayList line;
-    
+
+    /** 最大文字上浮距离 */
+    protected float maxTextRise;
+
+    /** 最大文字下沉距离 */
+    protected float maxTextDrop;
+
+    /** true : 存在常规标签（非上下标） */
+    protected boolean existNormalTag;
+
     /** The left indentation of the line. */
     protected float left;
     
@@ -211,18 +220,41 @@ public class PdfLine {
         }
         return overflow;
     }
-    
+
     private void addToLine(PdfChunk chunk) {
         //添加到line上处理计算line高度
         if (chunk.changeLeading && chunk.isImage()) {
-        	float f = chunk.getImage().getScaledHeight() + chunk.getImageOffsetY() + chunk.getImage().getBorderWidthTop();
-        	if (f > height) height = f;
+            float f = chunk.getImage().getScaledHeight() + chunk.getImageOffsetY() + chunk.getImage().getBorderWidthTop();
+            if (f > height) height = f;
         }else{
-            height = Math.max(height, chunk.getHeight());
+            float textRise = chunk.getTextRise();
+            if (textRise != 0) {
+                if (textRise > 0) {
+                    maxTextRise = Math.max(maxTextRise, textRise);
+                } else {
+                    maxTextDrop = -Math.min(maxTextDrop, textRise);
+                }
+
+            } else {
+                existNormalTag = true;
+            }
+            this.height = Math.max(this.height, chunk.getHeight() + (neddRiseOrDrop() ? maxTextRise + maxTextDrop : 0));
         }
     	line.add(chunk);
     }
-    
+
+    public float getMaxTextRise() {
+        return maxTextRise;
+    }
+
+    public float getMaxTextDrop() {
+        return maxTextDrop;
+    }
+
+    public boolean neddRiseOrDrop() {
+        return existNormalTag && (maxTextRise > 0 || maxTextDrop > 0);
+    }
+
     // methods to retrieve information
     
     /**