add matcher to fontstyleset

include/ports/SkFontMgr.h

 /*
  * Copyright 2013 Google Inc.
  *
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #ifndef SkFontMgr_DEFINED
 #define SkFontMgr_DEFINED
 
 #include "SkRefCnt.h"
 #include "SkFontStyle.h"
 
 class SkData;
 class SkStream;
 class SkString;
 
 class SkFontStyleSet : public SkRefCnt {
 public:
     virtual int count() = 0;
     virtual void getStyle(int index, SkFontStyle*, SkString* style) = 0;
     virtual SkTypeface* createTypeface(int index) = 0;
+    virtual SkTypeface* matchStyle(const SkFontStyle& pattern) = 0;
+
+    static SkFontStyleSet* CreateEmpty();
 };
 
 class SkFontMgr : public SkRefCnt {
 public:
     int countFamilies();
     void getFamilyName(int index, SkString* familyName);
     SkFontStyleSet* createStyleSet(int index);
 
+    SkFontStyleSet* matchFamily(const char familyName[]);
+
     /**
      *  Find the closest matching typeface to the specified familyName and style
      *  and return a ref to it. The caller must call unref() on the returned
      *  object. Will never return NULL, as it will return the default font if
      *  no matching font is found.
      */
     SkTypeface* matchFamilyStyle(const char familyName[], const SkFontStyle&);
 
     SkTypeface* matchFaceStyle(const SkTypeface*, const SkFontStyle&);
 
@@ skipping 23 matching lines @@
      *  Return a ref to the default fontmgr. The caller must call unref() on
      *  the returned object.
      */
     static SkFontMgr* RefDefault();
 
 protected:
     virtual int onCountFamilies() = 0;
     virtual void onGetFamilyName(int index, SkString* familyName) = 0;
     virtual SkFontStyleSet* onCreateStyleSet(int index) = 0;
 
+    virtual SkFontStyleSet* onMatchFamily(const char familyName[]) = 0;
+
     virtual SkTypeface* onMatchFamilyStyle(const char familyName[],
                                            const SkFontStyle&) = 0;
     virtual SkTypeface* onMatchFaceStyle(const SkTypeface*,
                                          const SkFontStyle&) = 0;
 
     virtual SkTypeface* onCreateFromData(SkData*, int ttcIndex) = 0;
     virtual SkTypeface* onCreateFromStream(SkStream*, int ttcIndex) = 0;
     virtual SkTypeface* onCreateFromFile(const char path[], int ttcIndex) = 0;
 
 private:
     static SkFontMgr* Factory();    // implemented by porting layer
     static SkMutex* Mutex();        // implemented by porting layer
 
     typedef SkRefCnt INHERITED;
 };
 
 #endif