Bug 1171357 - log font matching for textruns. r=m_kato

--HG--
extra : rebase_source : 4912e1d1597a9f1045a50eb41a6cf6e1f7a7bf68

gfx/thebes/gfxTextRun.cpp

@@ -2986,16 +2986,43 @@ void gfxFontGroup::ComputeRanges(nsTArray<gfxTextRange>& aRanges,
 
     aRanges[lastRangeIndex].end = aLength;
 
-#if 0
+#ifndef RELEASE_BUILD
-    // dump out font matching info
+    PRLogModuleInfo *log = (mStyle.systemFont ?
-    if (mStyle.systemFont) return;
+                            gfxPlatform::GetLog(eGfxLog_textrunui) :
-    for (size_t i = 0, i_end = aRanges.Length(); i < i_end; i++) {
+                            gfxPlatform::GetLog(eGfxLog_textrun));
-        const gfxTextRange& r = aRanges[i];
+
-        printf("fontmatch %zd:%zd font: %s (%d)\n",
+    if (MOZ_UNLIKELY(MOZ_LOG_TEST(log, LogLevel::Debug))) {
-               r.start, r.end,
+        nsAutoCString lang;
-               (r.font.get() ?
+        mStyle.language->ToUTF8String(lang);
-                    NS_ConvertUTF16toUTF8(r.font->GetName()).get() : "<null>"),
+        nsAutoString families;
-               r.matchType);
+        mFamilyList.ToString(families);
+
+        // collect the font matched for each range
+        nsAutoCString fontMatches;
+        for (size_t i = 0, i_end = aRanges.Length(); i < i_end; i++) {
+            char match[256];
+            const gfxTextRange& r = aRanges[i];
+            sprintf(match, " [%u:%u] %.200s (%s)",
+                    r.start, r.end,
+                    (r.font.get() ?
+                     NS_ConvertUTF16toUTF8(r.font->GetName()).get() : "<null>"),
+                    (r.matchType == gfxTextRange::kFontGroup ?
+                         "list" :
+                         (r.matchType == gfxTextRange::kPrefsFallback) ?
+                              "prefs" : "sys"));
+            fontMatches.Append(match);
+        }
+        MOZ_LOG(log, LogLevel::Debug,\
+               ("(%s-fontmatching) fontgroup: [%s] default: %s lang: %s script: %d"
+                "%s\n",
+                (mStyle.systemFont ? "textrunui" : "textrun"),
+                NS_ConvertUTF16toUTF8(families).get(),
+                (mFamilyList.GetDefaultFontType() == eFamily_serif ?
+                 "serif" :
+                 (mFamilyList.GetDefaultFontType() == eFamily_sans_serif ?
+                  "sans-serif" : "none")),
+                lang.get(), aRunScript,
+                fontMatches.get()));
     }
 #endif
 }