Sandbox html_viewer on Linux.

components/font_service/public/cpp/font_loader.cc

+// Copyright 2015 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 "components/font_service/public/cpp/font_loader.h"
+
+#include "components/font_service/public/cpp/font_service_thread.h"
+#include "mojo/application/public/cpp/application_impl.h"
+
+namespace font_service {
+
+FontLoader::FontLoader(mojo::ApplicationImpl* application_impl) {
+  mojo::URLRequestPtr request(mojo::URLRequest::New());
+  request->url = mojo::String::From("mojo:font_service");
+  FontServicePtr font_service;
+  application_impl->ConnectToService(request.Pass(), &font_service);
+
+  thread_ = new internal::FontServiceThread(font_service.Pass());
+}
+
+FontLoader::~FontLoader() {}
+
+bool FontLoader::matchFamilyName(const char family_name[],
+                                 SkTypeface::Style requested,
+                                 FontIdentity* out_font_identifier,
+                                 SkString* out_family_name,
+                                 SkTypeface::Style* out_style) {
+  return thread_->MatchFamilyName(family_name, requested, out_font_identifier,
+                                  out_family_name, out_style);
+}
+
+SkStreamAsset* FontLoader::openStream(const FontIdentity& identity) {
+  {
+    base::AutoLock lock(lock_);
+    auto mapped_font_files_it = mapped_font_files_.find(identity.fID);
+    if (mapped_font_files_it != mapped_font_files_.end())
+      return mapped_font_files_it->second->CreateMemoryStream();
+  }
+
+  scoped_refptr<internal::MappedFontFile> mapped_font_file =
+      thread_->OpenStream(identity);
+  if (!mapped_font_file)
+    return nullptr;
+
+  // Get notified with |mapped_font_file| is destroyed.
+  mapped_font_file->set_observer(this);
+
+  {
+    base::AutoLock lock(lock_);
+    auto mapped_font_files_it =
+        mapped_font_files_.insert(std::make_pair(mapped_font_file->font_id(),
+                                                 mapped_font_file.get()))
+            .first;
+    return mapped_font_files_it->second->CreateMemoryStream();
+  }
+}
+
+void FontLoader::OnMappedFontFileDestroyed(internal::MappedFontFile* f) {
+  base::AutoLock lock(lock_);
+  mapped_font_files_.erase(f->font_id());
+}
+
+}  // namespace font_service