Enable EmojiFont to return converter name for Shift_JIS.

This function will be used in WebKit (ucnv.cpp), which currently
embeds the string "docomo-emoji", which is not flexible.

Bug: 2327318
Change-Id: Iccbef2882ad931bde9b3ddefe34e81646e5b0686

emoji/EmojiFont.cpp

@@ -35,6 +35,8 @@
 
 #include "gmoji_pua_table.h"
 
+#include <string.h>
+
 namespace android {
 
 // lazily allocate the factory
@@ -125,6 +127,20 @@ bool EmojiFont::IsAvailable() {
     return get_emoji_factory() != NULL;
 }
 
+const char *EmojiFont::GetShiftJisConverterName() {
+    EmojiFactory* fact = get_emoji_factory();
+    if (NULL != fact) {
+        if (strcmp(fact->Name(), "kddi") == 0) {
+            return "kddi-emoji";
+        } else if (strcmp(fact->Name(), "softbank") == 0) {
+            return "softbank-emoji";
+        }
+    }
+
+    // Until Eclair, we have used DoCoMo's Shift_JIS table.
+    return "docomo-emoji";
+}
+
 uint16_t EmojiFont::UnicharToGlyph(int32_t unichar) {
     // do a quick range check before calling the search routine
     if (unichar >= GMOJI_PUA_MIN && unichar <= GMOJI_PUA_MAX) {

emoji/EmojiFont.h

@@ -40,7 +40,7 @@ namespace android {
          */
         static bool IsAvailable();
 
-        /** Return index for the corresponding index to the emoji table, or 0
+        /** Returns index for the corresponding index to the emoji table, or 0
             if there is no matching emoji form.
          */
         static uint16_t UnicharToGlyph(int32_t unichar);
@@ -51,18 +51,21 @@ namespace android {
         static bool IsEmojiGlyph(uint16_t index) {
             return index >= kGlyphBase;
         }
-        
+
         /** Returns the advance width for the specified emoji form.
          */
         static SkScalar GetAdvanceWidth(uint16_t index, const SkPaint& paint);
-        
+
         /** Draw the specified emoji form, given the x,y origin of the text
             version. The paint is the one associated with the text that has
             the emoji in it.
          */
         static void Draw(SkCanvas*, uint16_t index, SkScalar x, SkScalar y,
                          const SkPaint& paint);
-        
+
+        /** Returns the conver name for Shift_JIS (one of Japanese charset)
+         */
+        static const char* GetShiftJisConverterName();
     private:
         enum {
             /*  this is our internal trick to embedded private emoji glyph IDs