229 lines
8.1 KiB
C++
229 lines
8.1 KiB
C++
// Copyright (c) 2013 GitHub, Inc.
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// Use of this source code is governed by the MIT license that can be
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// found in the LICENSE file.
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#include "atom/renderer/atom_renderer_client.h"
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#include <algorithm>
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#include <string>
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#include "atom/common/node_bindings.h"
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#include "atom/common/options_switches.h"
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#include "atom/renderer/api/atom_renderer_bindings.h"
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#include "atom/renderer/atom_render_view_observer.h"
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#include "chrome/renderer/printing/print_web_view_helper.h"
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#include "chrome/renderer/tts_dispatcher.h"
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#include "content/public/common/content_constants.h"
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#include "content/public/renderer/render_frame.h"
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#include "content/public/renderer/render_frame_observer.h"
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#include "content/public/renderer/render_thread.h"
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#include "base/command_line.h"
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#include "native_mate/converter.h"
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#include "third_party/WebKit/public/web/WebCustomElement.h"
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#include "third_party/WebKit/public/web/WebFrame.h"
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#include "third_party/WebKit/public/web/WebPluginParams.h"
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#include "third_party/WebKit/public/web/WebKit.h"
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#include "third_party/WebKit/public/web/WebRuntimeFeatures.h"
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#include "atom/common/node_includes.h"
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namespace atom {
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namespace {
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bool IsSwitchEnabled(base::CommandLine* command_line,
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const char* switch_string,
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bool* enabled) {
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std::string value = command_line->GetSwitchValueASCII(switch_string);
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if (value == "true")
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*enabled = true;
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else if (value == "false")
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*enabled = false;
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else
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return false;
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return true;
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}
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// Helper class to forward the WillReleaseScriptContext message to the client.
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class AtomRenderFrameObserver : public content::RenderFrameObserver {
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public:
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AtomRenderFrameObserver(content::RenderFrame* frame,
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AtomRendererClient* renderer_client)
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: content::RenderFrameObserver(frame),
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renderer_client_(renderer_client) {}
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// content::RenderFrameObserver:
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virtual void WillReleaseScriptContext(v8::Handle<v8::Context> context,
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int world_id) OVERRIDE {
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renderer_client_->WillReleaseScriptContext(
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render_frame()->GetWebFrame(), context, world_id);
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}
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private:
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AtomRendererClient* renderer_client_;
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DISALLOW_COPY_AND_ASSIGN(AtomRenderFrameObserver);
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};
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} // namespace
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AtomRendererClient::AtomRendererClient()
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: node_bindings_(NodeBindings::Create(false)),
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atom_bindings_(new AtomRendererBindings),
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main_frame_(NULL) {
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}
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AtomRendererClient::~AtomRendererClient() {
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}
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void AtomRendererClient::WebKitInitialized() {
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EnableWebRuntimeFeatures();
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blink::WebCustomElement::addEmbedderCustomElementName("webview");
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blink::WebCustomElement::addEmbedderCustomElementName("browserplugin");
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node_bindings_->Initialize();
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node_bindings_->PrepareMessageLoop();
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DCHECK(!global_env);
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// Create a default empty environment which would be used when we need to
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// run V8 code out of a window context (like running a uv callback).
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v8::Isolate* isolate = blink::mainThreadIsolate();
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v8::HandleScope handle_scope(isolate);
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v8::Local<v8::Context> context = v8::Context::New(isolate);
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global_env = node::Environment::New(context);
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}
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void AtomRendererClient::RenderThreadStarted() {
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content::RenderThread::Get()->AddObserver(this);
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}
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void AtomRendererClient::RenderFrameCreated(
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content::RenderFrame* render_frame) {
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new AtomRenderFrameObserver(render_frame, this);
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}
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void AtomRendererClient::RenderViewCreated(content::RenderView* render_view) {
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new printing::PrintWebViewHelper(render_view);
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new AtomRenderViewObserver(render_view, this);
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}
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blink::WebSpeechSynthesizer* AtomRendererClient::OverrideSpeechSynthesizer(
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blink::WebSpeechSynthesizerClient* client) {
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return new TtsDispatcher(client);
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}
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bool AtomRendererClient::OverrideCreatePlugin(
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content::RenderFrame* render_frame,
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blink::WebLocalFrame* frame,
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const blink::WebPluginParams& params,
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blink::WebPlugin** plugin) {
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base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
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if (params.mimeType.utf8() == content::kBrowserPluginMimeType ||
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command_line->HasSwitch(switches::kEnablePlugins))
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return false;
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*plugin = nullptr;
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return true;
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}
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void AtomRendererClient::DidCreateScriptContext(blink::WebFrame* frame,
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v8::Handle<v8::Context> context,
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int extension_group,
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int world_id) {
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// The first web frame is the main frame.
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if (main_frame_ == NULL)
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main_frame_ = frame;
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v8::Context::Scope scope(context);
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// Check the existance of process object to prevent duplicate initialization.
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if (context->Global()->Has(
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mate::StringToV8(context->GetIsolate(), "process")))
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return;
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// Give the node loop a run to make sure everything is ready.
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node_bindings_->RunMessageLoop();
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// Setup node environment for each window.
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node::Environment* env = node_bindings_->CreateEnvironment(context);
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// Add atom-shell extended APIs.
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atom_bindings_->BindToFrame(frame);
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// Store the created environment.
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web_page_envs_.push_back(env);
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// Make uv loop being wrapped by window context.
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if (node_bindings_->uv_env() == NULL)
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node_bindings_->set_uv_env(env);
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}
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void AtomRendererClient::WillReleaseScriptContext(
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blink::WebFrame* frame,
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v8::Handle<v8::Context> context,
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int world_id) {
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node::Environment* env = node::Environment::GetCurrent(context);
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if (env == NULL) {
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LOG(ERROR) << "Encounter a non-node context when releasing script context";
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return;
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}
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// Clear the environment.
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web_page_envs_.erase(
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std::remove(web_page_envs_.begin(), web_page_envs_.end(), env),
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web_page_envs_.end());
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// Notice that we are not disposing the environment object here, because there
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// may still be pending uv operations in the uv loop, and when they got done
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// they would be needing the original environment.
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// So we are leaking the environment object here, just like Chrome leaking the
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// memory :) . Since it's only leaked when refreshing or unloading, so as long
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// as we make sure renderer process is restared then the memory would not be
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// leaked.
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// env->Dispose();
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// Wrap the uv loop with another environment.
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if (env == node_bindings_->uv_env()) {
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node::Environment* env = web_page_envs_.size() > 0 ? web_page_envs_[0] :
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NULL;
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node_bindings_->set_uv_env(env);
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}
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}
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bool AtomRendererClient::ShouldFork(blink::WebFrame* frame,
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const GURL& url,
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const std::string& http_method,
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bool is_initial_navigation,
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bool is_server_redirect,
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bool* send_referrer) {
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// Never fork renderer process for guests.
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if (frame->uniqueName().utf8() == "ATOM_SHELL_GUEST_WEB_VIEW")
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return false;
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// Handle all the navigations and reloads in browser.
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// FIXME We only support GET here because http method will be ignored when
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// the OpenURLFromTab is triggered, which means form posting would not work,
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// we should solve this by patching Chromium in future.
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return http_method == "GET";
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}
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void AtomRendererClient::EnableWebRuntimeFeatures() {
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base::CommandLine* command_line = base::CommandLine::ForCurrentProcess();
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bool b;
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if (IsSwitchEnabled(command_line, switches::kExperimentalFeatures, &b))
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blink::WebRuntimeFeatures::enableExperimentalFeatures(b);
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if (IsSwitchEnabled(command_line, switches::kExperimentalCanvasFeatures, &b))
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blink::WebRuntimeFeatures::enableExperimentalCanvasFeatures(b);
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if (IsSwitchEnabled(command_line, switches::kSubpixelFontScaling, &b))
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blink::WebRuntimeFeatures::enableSubpixelFontScaling(b);
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if (IsSwitchEnabled(command_line, switches::kOverlayScrollbars, &b))
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blink::WebRuntimeFeatures::enableOverlayScrollbars(b);
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if (IsSwitchEnabled(command_line, switches::kOverlayFullscreenVideo, &b))
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blink::WebRuntimeFeatures::enableOverlayFullscreenVideo(b);
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if (IsSwitchEnabled(command_line, switches::kSharedWorker, &b))
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blink::WebRuntimeFeatures::enableSharedWorker(b);
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}
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} // namespace atom
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