Rendering text-justify:distribute for 8 bit characters.

Source/platform/fonts/Character.cpp

 /*
  * Copyright (C) 2014 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 243 matching lines @@
         0x1F110, 0x1F129,
         0x1F130, 0x1F149,
         0x1F150, 0x1F169,
         0x1F170, 0x1F189,
         0x1F200, 0x1F6FF
     };
 
     return valueInIntervalList(cjkSymbolRanges, c);
 }
 
-unsigned Character::expansionOpportunityCount(const LChar* characters, size_t length, TextDirection direction, bool& isAfterExpansion)
+unsigned Character::expansionOpportunityCount(const LChar* characters, size_t length, TextDirection direction, bool& isAfterExpansion, const TextJustifyStore textJustify)
 {
     unsigned count = 0;
-    if (direction == LTR) {
-        for (size_t i = 0; i < length; ++i) {
-            if (treatAsSpace(characters[i])) {
-                count++;
-                isAfterExpansion = true;
-            } else {
-                isAfterExpansion = false;
+    if (textJustify == TextJustifyDistribute) {
+        count = length - 1;
+    } else {
+        if (direction == LTR) {
+            for (size_t i = 0; i < length; ++i) {
+                if (treatAsSpace(characters[i]))
+                    count++;
             }
-        }
-    } else {
-        for (size_t i = length; i > 0; --i) {
-            if (treatAsSpace(characters[i - 1])) {
-                count++;
-                isAfterExpansion = true;
-            } else {
-                isAfterExpansion = false;
+        } else {
+            for (size_t i = length; i > 0; --i) {
+                if (treatAsSpace(characters[i - 1]))
+                    count++;
             }
         }
     }
+    int lastCharacter = (direction == LTR) ? length - 1 : 0;
+    isAfterExpansion = treatAsSpace(characters[lastCharacter]);
+
     return count;
 }
 
-unsigned Character::expansionOpportunityCount(const UChar* characters, size_t length, TextDirection direction, bool& isAfterExpansion)
+unsigned Character::expansionOpportunityCount(const UChar* characters, size_t length, TextDirection direction, bool& isAfterExpansion, const TextJustifyStore textJustify)
 {
     static bool expandAroundIdeographs = FontPlatformFeatures::canExpandAroundIdeographsInComplexText();
     unsigned count = 0;
     if (direction == LTR) {
         for (size_t i = 0; i < length; ++i) {
             UChar32 character = characters[i];
             if (treatAsSpace(character)) {
                 count++;
                 isAfterExpansion = true;
                 continue;
@@ skipping 66 matching lines @@
 {
     return normalizeSpacesInternal(characters, length);
 }
 
 String Character::normalizeSpaces(const UChar* characters, unsigned length)
 {
     return normalizeSpacesInternal(characters, length);
 }
 
 } // namespace blink