Bug 412859. Some code to dump the contents of the textrun word cache. debug only. r=pavlov

gfx/thebes/public/gfxFont.h

@@ -52,6 +52,10 @@
 #include "nsMathUtils.h"
 #include "nsBidiUtils.h"
 
+#ifdef DEBUG
+#include <stdio.h>
+#endif
+
 class gfxContext;
 class gfxTextRun;
 class nsIAtom;
@@ -1260,6 +1264,8 @@ public:
 #ifdef DEBUG
     // number of entries referencing this textrun in the gfxTextRunWordCache
     PRUint32 mCachedWords;
+    
+    void Dump(FILE* aOutput);
 #endif
 
 protected:

gfx/thebes/src/gfxFont.cpp

@@ -1979,3 +1979,36 @@ gfxTextRun::FetchGlyphExtents(gfxContext *aRefContext)
         }
     }
 }
+
+#ifdef DEBUG
+void
+gfxTextRun::Dump(FILE* aOutput) {
+    if (!aOutput) {
+        aOutput = stdout;
+    }
+
+    PRUint32 i;
+    fputc('"', aOutput);
+    for (i = 0; i < mCharacterCount; ++i) {
+        PRUnichar ch = GetChar(i);
+        if (ch >= 32 && ch < 128) {
+            fputc(ch, aOutput);
+        } else {
+            fprintf(aOutput, "\\u%4x", ch);
+        }
+    }
+    fputs("\" [", aOutput);
+    for (i = 0; i < mGlyphRuns.Length(); ++i) {
+        if (i > 0) {
+            fputc(',', aOutput);
+        }
+        gfxFont* font = mGlyphRuns[i].mFont;
+        const gfxFontStyle* style = font->GetStyle();
+        NS_ConvertUTF16toUTF8 fontName(font->GetName());
+        fprintf(aOutput, "%d: %s %f/%d/%d/%s", mGlyphRuns[i].mCharacterOffset,
+                fontName.get(), style->size,
+                style->weight, style->style, style->langGroup.get());
+    }
+    fputc(']', aOutput);
+}
+#endif

gfx/thebes/src/gfxTextRunWordCache.cpp

@@ -37,6 +37,10 @@
 
 #include "gfxTextRunWordCache.h"
 
+#ifdef DEBUG
+#include <stdio.h>
+#endif
+
 /**
  * Cache individual "words" (strings delimited by white-space or white-space-like
  * characters that don't involve kerning or ligatures) in textruns.
@@ -83,6 +87,10 @@ public:
      */
     void RemoveTextRun(gfxTextRun *aTextRun);
 
+#ifdef DEBUG
+    void Dump();
+#endif
+
 protected:
     struct CacheHashKey {
         void        *mFontOrGroup;
@@ -158,6 +166,10 @@ protected:
                     PRUint32 aEnd, PRUint32 aHash);    
 
     nsTHashtable<CacheHashEntry> mCache;
+    
+#ifdef DEBUG
+    static PLDHashOperator PR_CALLBACK CacheDumpEntry(CacheHashEntry* aEntry, void* userArg);
+#endif
 };
 
 static PRLogModuleInfo *gWordCacheLog = PR_NewLogModule("wordCache");
@@ -660,6 +672,28 @@ TextRunWordCache::CacheHashEntry::HashKey(const KeyTypePointer aKey)
         aKey->mOptimizeSpeed*8;
 }
 
+#ifdef DEBUG
+PLDHashOperator PR_CALLBACK
+TextRunWordCache::CacheDumpEntry(CacheHashEntry* aEntry, void* userArg)
+{
+    FILE* output = static_cast<FILE*>(userArg);
+    if (!aEntry->mTextRun) {
+        fprintf(output, "<EMPTY>\n");
+        return PL_DHASH_NEXT;
+    }
+    fprintf(output, "Word at %x:%d => ", aEntry->mTextRun, aEntry->mWordOffset);
+    aEntry->mTextRun->Dump(output);
+    fprintf(output, " (hashed by %s)\n", aEntry->mHashedByFont ? "font" : "fontgroup");
+    return PL_DHASH_NEXT;
+}
+
+void
+TextRunWordCache::Dump()
+{
+    mCache.EnumerateEntries(CacheDumpEntry, stdout);
+}
+#endif
+
 static TextRunWordCache *gTextRunWordCache = nsnull;
 
 nsresult