From aa80c5a14161dce0b6b65605262d7daa8f0c78c8 Mon Sep 17 00:00:00 2001
From: Steven Watanabe <steven@providere-consulting.com>
Date: Thu, 29 Mar 2012 23:46:06 +0000
Subject: [PATCH] Initial support for highlighting jam code.

[SVN r77636]
---
 xsl/annotation.xsl       |  6 +++
 xsl/docbook.xsl          |  6 +++
 xsl/source-highlight.xsl | 79 ++++++++++++++++++++++++++++++++++++++++
 3 files changed, 91 insertions(+)

diff --git a/xsl/annotation.xsl b/xsl/annotation.xsl
index 9f5a178..0040b0f 100644
--- a/xsl/annotation.xsl
+++ b/xsl/annotation.xsl
@@ -388,6 +388,12 @@
     </computeroutput>
   </xsl:template>
 
+  <xsl:template match="code[@lang='jam']" mode="annotation">
+    <computeroutput>
+      <xsl:apply-templates mode="annotation"/>
+    </computeroutput>
+  </xsl:template>
+
   <xsl:template match="bold" mode="annotation">
     <emphasis role="bold">
       <xsl:apply-templates mode="annotation"/>
diff --git a/xsl/docbook.xsl b/xsl/docbook.xsl
index c2ad521..ee40de7 100644
--- a/xsl/docbook.xsl
+++ b/xsl/docbook.xsl
@@ -392,6 +392,12 @@ Error: XSL template 'link-or-anchor' called with invalid link-type '<xsl:value-o
     </computeroutput>
   </xsl:template>
 
+  <xsl:template match="code[@lang='jam']">
+    <computeroutput>
+      <xsl:apply-templates mode="highlight-jam"/>
+    </computeroutput>
+  </xsl:template>
+
   <xsl:template match="bold">
     <emphasis role="bold">
       <xsl:apply-templates mode="annotation"/>
diff --git a/xsl/source-highlight.xsl b/xsl/source-highlight.xsl
index b3903e5..e31b186 100644
--- a/xsl/source-highlight.xsl
+++ b/xsl/source-highlight.xsl
@@ -435,6 +435,75 @@
     </xsl:choose>
   </xsl:template>
 
+  <!-- Jam syntax highlighting -->
+
+  <xsl:variable name="jam-keywords" select="' actions bind case class default else for if ignore in include local module on piecemeal quietly return rule switch together updated while '"/>
+  <xsl:variable name="jam-operators" select="' ! != &amp; &amp;&amp; ( ) += : ; &lt; &lt;= = &gt; &gt;= ?= [ ] { | || } '"/>
+
+  <xsl:template name="highlight-jam-word">
+    <xsl:param name="text"/>
+    <xsl:choose>
+      <xsl:when test="contains($jam-keywords, concat(' ', $text, ' '))">
+        <xsl:call-template name="highlight-keyword">
+          <xsl:with-param name="keyword" select="$text"/>
+        </xsl:call-template>
+      </xsl:when>
+      <xsl:when test="contains($jam-operators, concat(' ', $text, ' '))">
+        <xsl:call-template name="highlight-special">
+          <xsl:with-param name="text" select="$text"/>
+        </xsl:call-template>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:value-of select="$text"/>
+      </xsl:otherwise>
+    </xsl:choose>
+  </xsl:template>
+
+  <xsl:template name="jam-word-length">
+    <xsl:param name="text"/>
+    <xsl:param name="pos" select="1"/>
+    <xsl:choose>
+      <xsl:when test="string-length($text) + 1= $pos">
+        <xsl:value-of select="$pos - 1"/>
+      </xsl:when>
+      <xsl:when test="contains(' &#xA;&#xD;&#x9;', substring($text, $pos, 1))">
+        <xsl:value-of select="$pos - 1"/>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:call-template name="jam-word-length">
+          <xsl:with-param name="text" select="$text"/>
+          <xsl:with-param name="pos" select="$pos + 1"/>
+        </xsl:call-template>
+      </xsl:otherwise>
+    </xsl:choose>
+  </xsl:template>
+
+  <xsl:template name="highlight-jam-text">
+    <xsl:param name="text"/>
+    <xsl:choose>
+      <xsl:when test="string-length($text) = 0"/>
+      <xsl:when test="contains(' &#xA;&#xD;&#x9;', substring($text, 1, 1))">
+        <xsl:value-of select="substring($text, 1, 1)"/>
+        <xsl:call-template name="highlight-jam-text">
+          <xsl:with-param name="text" select="substring($text, 2)"/>
+        </xsl:call-template>
+      </xsl:when>
+      <xsl:otherwise>
+        <xsl:variable name="length">
+          <xsl:call-template name="jam-word-length">
+            <xsl:with-param name="text" select="$text"/>
+          </xsl:call-template>
+        </xsl:variable>
+        <xsl:call-template name="highlight-jam-word">
+          <xsl:with-param name="text" select="substring($text, 1, $length)"/>
+        </xsl:call-template>
+        <xsl:call-template name="highlight-jam-text">
+          <xsl:with-param name="text" select="substring($text, $length + 1)"/>
+        </xsl:call-template>
+      </xsl:otherwise>
+    </xsl:choose>
+  </xsl:template>
+
   <!-- Perform C++ syntax highlighting on the given text -->
   <xsl:template name="highlight-text">
     <xsl:param name="text" select="."/>
@@ -481,4 +550,14 @@
     <xsl:apply-templates mode="highlight"/>
   </xsl:template>
 
+  <xsl:template match="*" mode="highlight-jam">
+    <xsl:apply-templates mode="annotation"/>
+  </xsl:template>
+
+  <xsl:template match="text()" mode="highlight-jam">
+    <xsl:call-template name="highlight-jam-text">
+      <xsl:with-param name="text" select="."/>
+    </xsl:call-template>
+  </xsl:template>
+
 </xsl:stylesheet>