REPORT-10262 html大文本精确分页

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

@@ -55,6 +55,8 @@ import com.fr.third.v2.lowagie.text.Image;
 import sun.font.FontDesignMetrics;
 
 import java.awt.FontMetrics;
+import java.awt.font.FontRenderContext;
+import java.awt.geom.AffineTransform;
 
 /**
  * <CODE>PdfFont</CODE> is the Pdf Font object.
@@ -72,36 +74,37 @@ import java.awt.FontMetrics;
  */
 
 public class PdfFont implements Comparable {
+    private static final int ONE_THOUSAND = 1000 ;
 
     private Font oriFont;
 
     /** the font metrics. */
 //    private BaseFont font;
-    
+
     /** the size. */
     private float size;
-    
+
     /** an image. */
     protected Image image;
 
     protected float hScale = 1;
-    
+
     // constructors
-    
+
     PdfFont(Font oriFont, float size) {
         this.size = size;
         this.oriFont = oriFont;
     }
 
     // methods
-    
+
     /**
      * Compares this <CODE>PdfFont</CODE> with another
      *
      * @param	object	the other <CODE>PdfFont</CODE>
      * @return	a value
      */
-    
+
     public int compareTo(Object object) {
         if (image != null)
             return 0;
@@ -125,13 +128,13 @@ public class PdfFont implements Comparable {
     }
 
 
-    
+
     /**
      * Returns the size of this font.
      *
      * @return		a size
      */
-    
+
     float size() {
         if (image == null)
             return size;
@@ -139,24 +142,24 @@ public class PdfFont implements Comparable {
             return image.getScaledHeight();
         }
     }
-    
+
     /**
      * Returns the approximative width of 1 character of this font.
      *
      * @return		a width in Text Space
      */
-    
+
     float width() {
         return width(' ');
     }
-    
+
     /**
      * Returns the width of a certain character of this font.
      *
      * @param		character	a certain character
      * @return		a width in Text Space
      */
-    
+
     float width(int character) {
         FontMetrics metrics = FontDesignMetrics.getMetrics(getAwtFont());
         if (image == null)
@@ -164,15 +167,21 @@ public class PdfFont implements Comparable {
         else
             return image.getScaledWidth();
     }
-    
+
     float width(String s) {
-        FontMetrics metrics = FontDesignMetrics.getMetrics(getAwtFont());
+        java.awt.Font font = this.getAwtFont();
+        float scale = ONE_THOUSAND / font.getSize2D();
+        java.awt.Font derivedFont = font.deriveFont(AffineTransform.getScaleInstance(scale, scale));
+        double width = derivedFont.getStringBounds(s,  new FontRenderContext(new AffineTransform(), true, true)).getWidth();
+        if (derivedFont.isTransformed()){
+            width /= scale;
+        }
         if (image == null)
-            return metrics.stringWidth(s) * hScale;
+            return (float) width * hScale;
         else
             return image.getScaledWidth();
     }
-    
+
     BaseFont getFont() {
         return  oriFont.getCalculatedBaseFont(false);
     }
@@ -195,7 +204,7 @@ public class PdfFont implements Comparable {
     void setImage(Image image) {
         this.image = image;
     }
-    
+
     static PdfFont getDefaultFont() {
         try {
 //            BaseFont bf = BaseFont.createFont(BaseFont.HELVETICA, BaseFont.WINANSI, false);