Add Pepper TrueType font API plumbing.

ppapi/proxy/truetype_font_singleton_resource.cc

Index: ppapi/proxy/truetype_font_singleton_resource.cc
diff --git a/ppapi/proxy/truetype_font_singleton_resource.cc b/ppapi/proxy/truetype_font_singleton_resource.cc
new file mode 100644
index 0000000000000000000000000000000000000000..b812bf1647fc1186a2dfcc8bc6d2899965630ed4
--- /dev/null
+++ b/ppapi/proxy/truetype_font_singleton_resource.cc
@@ -0,0 +1,68 @@
+// Copyright (c) 2013 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "ppapi/proxy/truetype_font_singleton_resource.h"
+
+#include "ppapi/proxy/ppapi_messages.h"
+#include "ppapi/shared_impl/array_writer.h"
+#include "ppapi/shared_impl/tracked_callback.h"
+#include "ppapi/shared_impl/var.h"
+
+namespace ppapi {
+namespace proxy {
+
+TrueTypeFontSingletonResource::TrueTypeFontSingletonResource(
+    Connection connection,
+    PP_Instance instance)
+    : PluginResource(connection, instance) {
+  SendCreate(BROWSER, PpapiHostMsg_TrueTypeFontSingleton_Create());
+}
+
+TrueTypeFontSingletonResource::~TrueTypeFontSingletonResource() {
+}
+
+thunk::PPB_TrueTypeFont_Singleton_API*
+TrueTypeFontSingletonResource::AsPPB_TrueTypeFont_Singleton_API() {
+  return this;
+}
+
+int32_t TrueTypeFontSingletonResource::GetFontFamilies(
+    PP_Instance instance,
+    const PP_ArrayOutput& output,
+    const scoped_refptr<TrackedCallback>& callback) {
+  Call<PpapiPluginMsg_TrueTypeFontSingleton_GetFontFamiliesReply>(BROWSER,
+      PpapiHostMsg_TrueTypeFontSingleton_GetFontFamilies(),
+      base::Bind(
+          &TrueTypeFontSingletonResource::OnPluginMsgGetFontFamiliesComplete,
+          this, callback, output));
+  return PP_OK_COMPLETIONPENDING;
+}
+
+void TrueTypeFontSingletonResource::OnPluginMsgGetFontFamiliesComplete(
+    scoped_refptr<TrackedCallback> callback,
+    PP_ArrayOutput array_output,
+    const ResourceMessageReplyParams& params,
+    const std::vector<std::string>& font_families) {
+  // The result code should contain the data size if it's positive.
+  int32_t result = params.result();
+  DCHECK((result < 0 && font_families.size() == 0) ||
+         result == static_cast<int32_t>(font_families.size()));

[jschuh, 2013/03/14 21:56:07]

What does a negative result mean, and should we just return an error from here?

[bbudge, 2013/03/14 23:20:23]

Negative means there is an error. On all current platform implementations, there
is no possibility of error, just a 0-length list. If there was an error, the
name list should be empty and we would construct a 0-length array of Vars and do
the array output.

On 2013/03/14 21:56:07, Justin Schuh wrote:

+
+  ArrayWriter output;
+  output.set_pp_array_output(array_output);
+  if (output.is_valid()) {
+    std::vector< scoped_refptr<Var> > font_family_vars;
+    for (size_t i = 0; i < font_families.size(); i++)
+      font_family_vars.push_back(
+          scoped_refptr<Var>(new StringVar(font_families[i])));
+    output.StoreVarVector(font_family_vars);
+  } else {
+    result = PP_ERROR_FAILED;
+  }
+
+  callback->Run(result);
+}
+
+}  // namespace proxy
+}  // namespace ppapi