Make SkFontMgr interface const.

src/fonts/SkFontMgr_fontconfig.cpp

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "SkFontMgr.h"
 #include "SkFontStyle.h"
 #include "SkFontConfigInterface.h"
@@ skipping 166 matching lines @@
 }
 
 SkTypeface* SkFontStyleSet_FC::matchStyle(const SkFontStyle& pattern) {
     return NULL;
 }
 
 class SkFontMgr_fontconfig : public SkFontMgr {
     SkAutoTUnref<SkFontConfigInterface> fFCI;
     SkDataTable* fFamilyNames;
 
-    void init() {
-        if (!fFamilyNames) {
-            fFamilyNames = fFCI->getFamilyNames();
-        }
-    }
 
 public:
     SkFontMgr_fontconfig(SkFontConfigInterface* fci)
         : fFCI(fci)
-        , fFamilyNames(NULL) {}
+        , fFamilyNames(fFCI->getFamilyNames()) {}
 
     virtual ~SkFontMgr_fontconfig() {
         SkSafeUnref(fFamilyNames);
     }
 
 protected:
-    virtual int onCountFamilies() {
-        this->init();
+    virtual int onCountFamilies() const SK_OVERRIDE {
         return fFamilyNames->count();
     }
 
-    virtual void onGetFamilyName(int index, SkString* familyName) {
-        this->init();
+    virtual void onGetFamilyName(int index, SkString* familyName) const SK_OVERRIDE {
         familyName->set(fFamilyNames->atStr(index));
     }
 
-    virtual SkFontStyleSet* onCreateStyleSet(int index) {
-        this->init();
+    virtual SkFontStyleSet* onCreateStyleSet(int index) const SK_OVERRIDE {
         return this->onMatchFamily(fFamilyNames->atStr(index));
     }
 
-    virtual SkFontStyleSet* onMatchFamily(const char familyName[]) {
-        this->init();
-
+    virtual SkFontStyleSet* onMatchFamily(const char familyName[]) const SK_OVERRIDE {
         FcPattern* pattern = FcPatternCreate();
 
         FcPatternAddString(pattern, FC_FAMILY, (FcChar8*)familyName);
 #if 0
         FcPatternAddBool(pattern, FC_SCALABLE, FcTrue);
 #endif
         FcConfigSubstitute(NULL, pattern, FcMatchPattern);
         FcDefaultSubstitute(pattern);
 
         const char* post_config_family = get_name(pattern, FC_FAMILY);
@@ skipping 23 matching lines @@
             }
         }
 
         SkFontStyleSet_FC* sset = SkNEW_ARGS(SkFontStyleSet_FC,
                                              (trimmedMatches.begin(),
                                               trimmedMatches.count()));
         return sset;
     }
 
     virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
-                                           const SkFontStyle&) { return NULL; }
+                                           const SkFontStyle&) const SK_OVERRIDE { return NULL; }
     virtual SkTypeface* onMatchFaceStyle(const SkTypeface*,
-                                         const SkFontStyle&) { return NULL; }
+                                         const SkFontStyle&) const SK_OVERRIDE { return NULL; }
 
-    virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) { return NULL; }
+    virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) const SK_OVERRIDE { return NULL; }
 
-    virtual SkTypeface* onCreateFromStream(SkStream* stream, int ttcIndex) {
+    virtual SkTypeface* onCreateFromStream(SkStream* stream, int ttcIndex) const SK_OVERRIDE {
         const size_t length = stream->getLength();
         if (!length) {
             return NULL;
         }
         if (length >= 1024 * 1024 * 1024) {
             return NULL;  // don't accept too large fonts (>= 1GB) for safety.
         }
 
         // TODO should the caller give us the style or should we get it from freetype?
         SkTypeface::Style style = SkTypeface::kNormal;
         bool isFixedWidth = false;
         if (!find_name_and_attributes(stream, NULL, &style, &isFixedWidth)) {
             return NULL;
         }
 
         SkTypeface* face = SkNEW_ARGS(FontConfigTypeface, (style, isFixedWidth, stream));
         return face;
     }
 
-    virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) {
+    virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) const SK_OVERRIDE {
         SkAutoTUnref<SkStream> stream(SkStream::NewFromFile(path));
         return stream.get() ? this->createFromStream(stream, ttcIndex) : NULL;
     }
 
     virtual SkTypeface* onLegacyCreateTypeface(const char familyName[],
-                                               unsigned styleBits) SK_OVERRIDE {
+                                               unsigned styleBits) const SK_OVERRIDE {
         return FontConfigTypeface::LegacyCreateTypeface(NULL, familyName,
                                                   (SkTypeface::Style)styleBits);
     }
 };
 
 SkFontMgr* SkFontMgr::Factory() {
     SkFontConfigInterface* fci = RefFCI();
     return fci ? SkNEW_ARGS(SkFontMgr_fontconfig, (fci)) : NULL;
 }