From d5905871951cde51c6dcaa01d745de2f884ce9a9 Mon Sep 17 00:00:00 2001
From: Dimitri van Heesch <dimitri@stack.nl>
Date: Sat, 26 Dec 2015 16:24:36 +0100
Subject: Bug 746162 - formulas creating invalid HTML code

---
 src/docparser.h        | 14 ++++++++++---
 src/htmldocvisitor.cpp | 55 ++++++++++++++++++++++++++++++++++++++++++--------
 2 files changed, 58 insertions(+), 11 deletions(-)

diff --git a/src/docparser.h b/src/docparser.h
index 5af5e96..e2751d8 100644
--- a/src/docparser.h
+++ b/src/docparser.h
@@ -309,10 +309,18 @@ class DocCite : public DocNode
 class DocStyleChange : public DocNode
 {
   public:
-    enum Style { Bold, Italic, Code, Center, Small, 
-                 Subscript, Superscript, Preformatted,
-                 Span, Div
+    enum Style { Bold          = (1<<0),
+                 Italic        = (1<<1),
+                 Code          = (1<<2),
+                 Center        = (1<<3),
+                 Small         = (1<<4),
+                 Subscript     = (1<<5),
+                 Superscript   = (1<<6),
+                 Preformatted  = (1<<7),
+                 Span          = (1<<8),
+                 Div           = (1<<9)
                };
+
     DocStyleChange(DocNode *parent,uint position,Style s,bool enable,
                    const HtmlAttribList *attribs=0) : 
       m_position(position), m_style(s), m_enable(enable)
diff --git a/src/htmldocvisitor.cpp b/src/htmldocvisitor.cpp
index d1e4ffb..0533f87 100644
--- a/src/htmldocvisitor.cpp
+++ b/src/htmldocvisitor.cpp
@@ -42,7 +42,7 @@ static const char types[][NUM_HTML_LIST_TYPES] = {"1", "a", "i", "A"};
 static QCString convertIndexWordToAnchor(const QString &word)
 {
   static char hex[] = "0123456789abcdef";
-  QCString result;
+  QCString result="a";
   const char *str = word.data();
   unsigned char c;
   if (str)
@@ -54,8 +54,7 @@ static QCString convertIndexWordToAnchor(const QString &word)
           (c >= '0' && c <= '9') || // DIGIT
           c == '-' ||
           c == '.' ||
-          c == '_' ||
-          c == '~'
+          c == '_'
          )
       {
         result += c;
@@ -63,7 +62,7 @@ static QCString convertIndexWordToAnchor(const QString &word)
       else
       {
         char enc[4];
-        enc[0] = '%';
+        enc[0] = ':';
         enc[1] = hex[(c & 0xf0) >> 4];
         enc[2] = hex[c & 0xf];
         enc[3] = 0;
@@ -2044,6 +2043,42 @@ void HtmlDocVisitor::writePlantUMLFile(const QCString &fileName,
   }
 }
 
+/** Returns TRUE if the child nodes in paragraph \a para until \a nodeIndex
+    contain a style change node that is still active and that style change is one that
+    must be located outside of a paragraph, i.e. it is a center, div, or pre tag.
+    See also bug746162.
+ */
+static bool insideStyleChangeThatIsOutsideParagraph(DocPara *para,int nodeIndex)
+{
+  //printf("insideStyleChangeThatIsOutputParagraph(index=%d)\n",nodeIndex);
+  int styleMask=0;
+  bool styleOutsideParagraph=FALSE;
+  while (nodeIndex>=0 && !styleOutsideParagraph)
+  {
+    DocNode *n = para->children().at(nodeIndex);
+    if (n->kind()==DocNode::Kind_StyleChange)
+    {
+      DocStyleChange *sc = (DocStyleChange*)n;
+      if (!sc->enable()) // remember styles that has been closed already
+      {
+        styleMask|=(int)sc->style();
+      }
+      bool paraStyle = sc->style()==DocStyleChange::Center ||
+                       sc->style()==DocStyleChange::Div    ||
+                       sc->style()==DocStyleChange::Preformatted;
+      //printf("Found style change %s enabled=%d\n",sc->styleString(),sc->enable());
+      if (sc->enable() && (styleMask&(int)sc->style())==0 && // style change that is still active
+          paraStyle
+         )
+      {
+        styleOutsideParagraph=TRUE;
+      }
+    }
+    nodeIndex--;
+  }
+  return styleOutsideParagraph;
+}
+
 /** Used for items found inside a paragraph, which due to XHTML restrictions
  *  have to be outside of the paragraph. This method will forcefully end
  *  the current paragraph and forceStartParagraph() will restart it.
@@ -2057,7 +2092,7 @@ void HtmlDocVisitor::forceEndParagraph(DocNode *n)
     int nodeIndex = para->children().findRef(n);
     nodeIndex--;
     if (nodeIndex<0) return; // first node
-    while (nodeIndex>=0 && 
+    while (nodeIndex>=0 &&
            para->children().at(nodeIndex)->kind()==DocNode::Kind_WhiteSpace
           )
     {
@@ -2069,12 +2104,14 @@ void HtmlDocVisitor::forceEndParagraph(DocNode *n)
       //printf("n=%p kind=%d outside=%d\n",n,n->kind(),mustBeOutsideParagraph(n));
       if (mustBeOutsideParagraph(n)) return;
     }
-
+    nodeIndex--;
+    bool styleOutsideParagraph=insideStyleChangeThatIsOutsideParagraph(para,nodeIndex);
     bool isFirst;
     bool isLast;
     getParagraphContext(para,isFirst,isLast);
-    //printf("forceEnd first=%d last=%d\n",isFirst,isLast);
+    //printf("forceEnd first=%d last=%d styleOutsideParagraph=%d\n",isFirst,isLast,styleOutsideParagraph);
     if (isFirst && isLast) return;
+    if (styleOutsideParagraph) return;
 
     m_t << "</p>";
   }
@@ -2092,9 +2129,11 @@ void HtmlDocVisitor::forceStartParagraph(DocNode *n)
     DocPara *para = (DocPara*)n->parent();
     int nodeIndex = para->children().findRef(n);
     int numNodes  = para->children().count();
+    bool styleOutsideParagraph=insideStyleChangeThatIsOutsideParagraph(para,nodeIndex);
+    if (styleOutsideParagraph) return;
     nodeIndex++;
     if (nodeIndex==numNodes) return; // last node
-    while (nodeIndex<numNodes && 
+    while (nodeIndex<numNodes &&
            para->children().at(nodeIndex)->kind()==DocNode::Kind_WhiteSpace
           )
     {
-- 
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