Sandbox html_viewer on Linux.

components/font_service/font_service_app.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/font_service_app.h"
+
+#include "base/files/file.h"
+#include "base/files/file_path.h"
+#include "mojo/application/public/cpp/application_connection.h"
+#include "mojo/platform_handle/platform_handle_functions.h"
+
+COMPILE_ASSERT(static_cast<uint32>(SkTypeface::kNormal) ==
+                   static_cast<uint32>(font_service::TYPEFACE_STYLE_NORMAL),
+               typeface_flags_should_match);
+COMPILE_ASSERT(static_cast<uint32>(SkTypeface::kBold) ==
+                   static_cast<uint32>(font_service::TYPEFACE_STYLE_BOLD),
+               typeface_flags_should_match);
+COMPILE_ASSERT(static_cast<uint32>(SkTypeface::kItalic) ==
+                   static_cast<uint32>(font_service::TYPEFACE_STYLE_ITALIC),
+               typeface_flags_should_match);
+COMPILE_ASSERT(
+    static_cast<uint32>(SkTypeface::kBoldItalic) ==
+        static_cast<uint32>(font_service::TYPEFACE_STYLE_BOLD_ITALIC),
+    typeface_flags_should_match);
+
+namespace {
+
+mojo::ScopedHandle GetHandleForPath(const base::FilePath& path) {
+  if (path.empty())
+    return mojo::ScopedHandle();
+
+  mojo::ScopedHandle to_pass;
+  base::File file(path, base::File::FLAG_OPEN | base::File::FLAG_READ);
+  if (!file.IsValid()) {
+    LOG(WARNING) << "file not valid, path=" << path.value();
+    return mojo::ScopedHandle();
+  }
+
+  MojoHandle mojo_handle;
+  MojoResult create_result =
+      MojoCreatePlatformHandleWrapper(file.TakePlatformFile(), &mojo_handle);
+  if (create_result != MOJO_RESULT_OK) {
+    LOG(WARNING) << "unable to create wrapper, path=" << path.value()
+                 << "result=" << create_result;
+    return mojo::ScopedHandle();
+  }
+
+  return mojo::ScopedHandle(mojo::Handle(mojo_handle)).Pass();
+}
+
+}  // namespace
+
+namespace font_service {
+
+FontServiceApp::FontServiceApp() {}
+
+FontServiceApp::~FontServiceApp() {}
+
+void FontServiceApp::Initialize(mojo::ApplicationImpl* app) {}
+
+bool FontServiceApp::ConfigureIncomingConnection(
+    mojo::ApplicationConnection* connection) {
+  connection->AddService(this);
+  return true;
+}
+
+void FontServiceApp::Create(mojo::ApplicationConnection* connection,
+                            mojo::InterfaceRequest<FontService> request) {
+  bindings_.AddBinding(this, request.Pass());
+}
+
+void FontServiceApp::MatchFamilyName(const mojo::String& family_name,
+                                     TypefaceStyle requested_style,
+                                     const MatchFamilyNameCallback& callback) {
+  SkFontConfigInterface::FontIdentity result_identity;
+  SkString result_family;
+  SkTypeface::Style result_style;
+  SkFontConfigInterface* fc =
+      SkFontConfigInterface::GetSingletonDirectInterface();
+  const bool r = fc->matchFamilyName(
+      family_name.data(), static_cast<SkTypeface::Style>(requested_style),
+      &result_identity, &result_family, &result_style);
+
+  if (!r) {
+    callback.Run(nullptr, "", TYPEFACE_STYLE_NORMAL);
+    return;
+  }
+
+  // Stash away the returned path, so we can give it an ID (index)
+  // which will later be given to us in a request to open the file.
+  int index = FindOrAddPath(result_identity.fString);
+
+  FontIdentityPtr identity(FontIdentity::New());
+  identity->id = static_cast<uint32_t>(index);
+  identity->ttc_index = result_identity.fTTCIndex;
+  identity->str_representation = result_identity.fString.c_str();
+
+  callback.Run(identity.Pass(), result_family.c_str(),
+               static_cast<TypefaceStyle>(result_style));
+}
+
+void FontServiceApp::OpenStream(uint32_t id_number,
+                                const OpenStreamCallback& callback) {
+  mojo::ScopedHandle handle;
+  if (id_number < static_cast<uint32_t>(paths_.count())) {
+    handle =
+        GetHandleForPath(base::FilePath(paths_[id_number]->c_str())).Pass();
+  }
+
+  callback.Run(handle.Pass());
+}
+
+int FontServiceApp::FindOrAddPath(const SkString& path) {
+  int count = paths_.count();
+  for (int i = 0; i < count; ++i) {
+    if (path == *paths_[i])
+      return i;
+  }
+  *paths_.append() = new SkString(path);
+  return count;
+}
+
+}  // namespace font_service