DO NOT MERGE Han Preference

Cherry-pick Id8c91ae0be6cad8a7ef77a0cd5803676290986c1 from master.

During font initialization, create a seperate fallback list for each
locale. At runtime, use the fallbacklist associated with the locale
set in the paint object. Fallback files are associated with locales in
fallback_fonts.xml. Multiple files can be associated with the same
locale, ordering within that langauge and apart from that language in
the fallback order is preserved.

This changelist also includes some refactoring, notably of the
functions that call getNextContext().

Change-Id: I121f0e491a522c4a8558a0066b2d8969fb8a3667

1 files changed, 54 insertions, 0 deletions

diff --git a/src/core/SkLanguage.cpp b/src/core/SkLanguage.cpp
new file mode 100644
index 0000000..3b8ba3c
--- /dev/null
+++ b/src/core/SkLanguage.cpp
@@ -0,0 +1,54 @@
+
+/*
+ * Copyright 2012 The Android Open Source Project
+ *
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include "SkLanguage.h"
+
+#ifdef SK_BUILD_FOR_ANDROID // currently only for Android
+
+#include "SkTDict.h"
+#include "SkThread.h"
+#include <cstring>
+
+SkLanguage SkLanguage::getParent() const {
+    SkASSERT(fInfo != NULL);
+    SkASSERT(fInfo->fTag != NULL);
+    const char* tag = fInfo->fTag.c_str();
+    SkASSERT(tag != NULL);
+
+    // strip off the rightmost "-.*"
+    char* parentTagEnd = strrchr(tag, '-');
+    if (parentTagEnd == NULL) {
+        return SkLanguage("");
+    }
+    size_t parentTagLen = parentTagEnd - tag;
+    char parentTag[parentTagLen + 1];
+    strncpy(parentTag, tag, parentTagLen);
+    parentTag[parentTagLen] = '\0';
+    return SkLanguage(parentTag);
+}
+
+SK_DECLARE_STATIC_MUTEX(gGetInfoMutex);
+const SkLanguageInfo* SkLanguage::getInfo(const char* tag) {
+    SkAutoMutexAcquire lock(gGetInfoMutex);
+
+    static const size_t kDictSize = 128;
+    static SkTDict<SkLanguageInfo*> tagToInfo(kDictSize);
+
+    // try a lookup
+    SkLanguageInfo* info;
+    if (tagToInfo.find(tag, &info)) {
+        return info;
+    }
+
+    // no match - add this language
+    info = new SkLanguageInfo(tag);
+    tagToInfo.set(tag, info);
+    return info;
+}
+
+#endif