From 57de10b2fdd6e6f0bbca3aac03bce84d82cfaba3 Mon Sep 17 00:00:00 2001
From: Jeremias Maerki <jeremias@apache.org>
Date: Sat, 16 Feb 2008 12:28:48 +0000
Subject: Extracted most of the code in CodePointMapping (generated by XSLT)
 into a base class for easier maintenance and proper Javadocs. Deprecated
 FOP's copy of Glyphs.java. Took a different approach at handling mapping
 alternatives for single-byte fonts. The AFM now only lists the main
 character. Substitution is done through Glyphs.java later in
 CodePointMapping. Fixed a problem in Type1FontLoader where the PFM overrides
 asc/desc/cap/x even though the AFM provides the values. It showed itself
 because the URW Symbol font has wrong values in the PFM. Added a note to
 myself in Type1FontLoader to implement the "Flags" value. The whole thing
 still seems to work without that part. Added a glyph name list to the
 CodePointMapping so we can work with the original list from the AFM.
 Otherwise, various mapping operations to and from resulted in unwanted
 mappings (because the mappings are not necessarily 1:1) and in the end the
 PDF received an incorrect Encoding map. Now there's no such problem anymore.

git-svn-id: https://svn.apache.org/repos/asf/xmlgraphics/fop/trunk@628280 13f79535-47bb-0310-9956-ffa450edef68
---
 src/codegen/fonts/code-point-mapping.xsl | 170 +++++++++++++++----------------
 1 file changed, 80 insertions(+), 90 deletions(-)

(limited to 'src/codegen')

diff --git a/src/codegen/fonts/code-point-mapping.xsl b/src/codegen/fonts/code-point-mapping.xsl
index c82ca0104..55b84c742 100644
--- a/src/codegen/fonts/code-point-mapping.xsl
+++ b/src/codegen/fonts/code-point-mapping.xsl
@@ -40,100 +40,19 @@
 
 package org.apache.fop.fonts;
 
-import java.util.Arrays;
 import java.util.Map;
 import java.util.Collections;
 
-import org.apache.fop.util.CharUtilities;
-
-public class CodePointMapping {
+public class CodePointMapping extends AbstractCodePointMapping {
 
 <xsl:apply-templates mode="constant"/>
 
-    private String name;
-    private char[] latin1Map;
-    private char[] characters;
-    private char[] codepoints;
-    private char[] unicodeMap; //code point to Unicode char
-
     public CodePointMapping(String name, int[] table) {
-        this.name = name;
-        int nonLatin1 = 0;
-        latin1Map = new char[256];
-        unicodeMap = new char[256];
-        Arrays.fill(unicodeMap, CharUtilities.NOT_A_CHARACTER);
-        for (int i = 0; i &lt; table.length; i += 2) {
-            char unicode = (char)table[i + 1];
-            if (unicode &lt; 256) {
-                if (latin1Map[unicode] == 0) {
-                    latin1Map[unicode] = (char) table[i];
-                }
-            } else {
-                ++nonLatin1;
-            }
-            if (unicodeMap[table[i]] == CharUtilities.NOT_A_CHARACTER) {
-                unicodeMap[table[i]] = unicode;
-            }
-        }
-        characters = new char[nonLatin1];
-        codepoints = new char[nonLatin1];
-        int top = 0;
-        for (int i = 0; i &lt; table.length; i += 2) {
-            char c = (char) table[i + 1];
-            if (c >= 256) {
-               ++top;
-               for (int j = top - 1; j >= 0; --j) {
-                   if (j > 0 &amp;&amp; characters[j - 1] >= c) {
-                       characters[j] = characters[j - 1];
-                       codepoints[j] = codepoints[j - 1];
-                   } else {
-                       characters[j] = c;
-                       codepoints[j] = (char) table[i];
-                       break;
-                   }
-               }
-            }
-        }
-    }
-
-    public String getName() {
-        return this.name;
-    }
-
-    public final char mapChar(char c) {
-        if (c &lt; 256) {
-            return latin1Map[c];
-        } else {
-            int bot = 0, top = characters.length - 1;
-            while (top >= bot) {
-                int mid = (bot + top) / 2;
-                char mc = characters[mid];
-
-                if (c == mc) {
-                    return codepoints[mid];
-                } else if (c &lt; mc) {
-                    top = mid - 1;
-                } else {
-                    bot = mid + 1;
-                }
-            }
-            return 0;
-        }
-    }
-
-    public final char getUnicodeForIndex(int idx) {
-        return this.unicodeMap[idx];
+        super(name, table);
     }
 
-    public final char[] getUnicodeCharMap() {
-        char[] copy = new char[this.unicodeMap.length];
-        System.arraycopy(this.unicodeMap, 0, copy, 0, this.unicodeMap.length);
-        return copy;
-    }
-
-    /** {@inheritDoc} */
-    public String toString() {
-        return getName();
+    public CodePointMapping(String name, int[] table, String[] charNameMap) {
+        super(name, table, charNameMap);
     }
 
     private static Map mappings;
@@ -146,13 +65,10 @@ public class CodePointMapping {
         if (mapping != null) {
             return mapping;
         } <xsl:apply-templates mode="get"/>
-        //TODO: Implement support for Expert and ExpertSubset encoding
-        else if (encoding.startsWith("Expert")) {
-            throw new UnsupportedOperationException(encoding + " not implemented yet");
-        }
         throw new UnsupportedOperationException("Unknown encoding: " + encoding);
     }
 <xsl:apply-templates mode="table"/>
+<xsl:apply-templates select="encoding" mode="names"/>
 }
   </xsl:template>
 
@@ -160,7 +76,7 @@ public class CodePointMapping {
   
   <xsl:template match="encoding" mode="get">
         else if (encoding.equals(<xsl:value-of select="@constant"/>)) {
-            mapping = new CodePointMapping(<xsl:value-of select="@constant"/>, enc<xsl:value-of select="@id"/>);
+    mapping = new CodePointMapping(<xsl:value-of select="@constant"/>, enc<xsl:value-of select="@id"/>, names<xsl:value-of select="@id"/>);
             mappings.put(<xsl:value-of select="@constant"/>, mapping);
             return mapping;
         }
@@ -178,4 +94,78 @@ public class CodePointMapping {
 </xsl:for-each></xsl:for-each>
         };
   </xsl:template>
+  
+  <xsl:template match="encoding" mode="names">
+    private static final String[] names<xsl:value-of select="@id"/>
+    = {
+<xsl:call-template name="charname">
+  <xsl:with-param name="idx" select="0"/>
+</xsl:call-template>
+        };
+  </xsl:template>
+  
+  <xsl:template name="charname">
+    <xsl:param name="idx"/>
+    <xsl:variable name="idxHEXraw">
+      <xsl:call-template name="toHex">
+        <xsl:with-param name="decimalNumber" select="$idx"/>
+      </xsl:call-template>
+    </xsl:variable>
+    <xsl:variable name="idxHEX">
+      <xsl:call-template name="padnumber">
+        <xsl:with-param name="num" select="$idxHEXraw"/>
+      </xsl:call-template>
+    </xsl:variable>
+    <xsl:variable name="idxhex" select="translate($idxHEX, 'ABCDEF', 'abcdef')"></xsl:variable>
+    <!--
+    <xsl:value-of select="$idx"/>-<xsl:value-of select="$idxHEXraw"/>-<xsl:value-of select="$idxHEX"/>-<xsl:value-of select="$idxhex"/>
+    -->
+    <xsl:if test="($idx mod 4) = 0">
+      <xsl:text>&#x0D;    /*</xsl:text><xsl:value-of select="$idxHEX"/><xsl:text>*/ </xsl:text>
+    </xsl:if>
+    <xsl:variable name="v">
+      <xsl:value-of select="child::glyph[@codepoint = $idxHEX or @codepoint = $idxhex]/@name"/><!--<xsl:value-of select="glyph[@codepoint = $idxhex]/@name"/>-->
+    </xsl:variable>
+    <xsl:choose>
+      <xsl:when test="string-length($v) > 0">
+        <xsl:text>"</xsl:text><xsl:value-of select="$v"/><xsl:text>"</xsl:text>
+      </xsl:when>
+      <xsl:otherwise>null</xsl:otherwise>
+    </xsl:choose>
+    
+    <xsl:if test="$idx &lt; 255">
+      <xsl:text>, </xsl:text>
+      <xsl:call-template name="charname">
+        <xsl:with-param name="idx" select="$idx + 1"/>
+      </xsl:call-template>
+    </xsl:if>
+  </xsl:template>
+  
+  <xsl:variable name="hexDigits" select="'0123456789ABCDEF'"/>
+  <xsl:template name="toHex">
+    <xsl:param name="decimalNumber" />
+    <xsl:if test="$decimalNumber >= 16">
+      <xsl:call-template name="toHex">
+        <xsl:with-param name="decimalNumber" select="floor($decimalNumber div 16)" />
+      </xsl:call-template>
+    </xsl:if>
+    <xsl:value-of select="substring($hexDigits, ($decimalNumber mod 16) + 1, 1)" />
+  </xsl:template>
+  
+  <xsl:template name="padnumber">
+    <xsl:param name="num"/>
+    <xsl:param name="len" select="2"/>
+    <!--
+    <xsl:text> </xsl:text><xsl:value-of select="$num"/>/<xsl:value-of select="$len"/>
+    -->
+    <xsl:choose>
+      <xsl:when test="string-length($num) &lt; $len">
+        <xsl:call-template name="padnumber">
+          <xsl:with-param name="num" select="concat('0',$num)"/>
+          <xsl:with-param name="len" select="$len"/>
+        </xsl:call-template>
+      </xsl:when>
+      <xsl:otherwise><xsl:value-of select="$num"/></xsl:otherwise>
+    </xsl:choose>
+  </xsl:template>
 </xsl:stylesheet>
-- 
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