/
atom_render_frame_observer.cc
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/
atom_render_frame_observer.cc
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// Copyright (c) 2017 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "atom/renderer/atom_render_frame_observer.h"
#include <string>
#include <vector>
#include "atom/common/api/api_messages.h"
#include "atom/common/api/event_emitter_caller.h"
#include "atom/common/heap_snapshot.h"
#include "atom/common/native_mate_converters/value_converter.h"
#include "atom/common/node_includes.h"
#include "base/strings/string_number_conversions.h"
#include "base/threading/thread_restrictions.h"
#include "base/trace_event/trace_event.h"
#include "content/public/renderer/render_frame.h"
#include "content/public/renderer/render_view.h"
#include "ipc/ipc_message_macros.h"
#include "native_mate/dictionary.h"
#include "net/base/net_module.h"
#include "net/grit/net_resources.h"
#include "third_party/blink/public/web/blink.h"
#include "third_party/blink/public/web/web_document.h"
#include "third_party/blink/public/web/web_draggable_region.h"
#include "third_party/blink/public/web/web_element.h"
#include "third_party/blink/public/web/web_local_frame.h"
#include "third_party/blink/public/web/web_script_source.h"
#include "ui/base/resource/resource_bundle.h"
namespace atom {
namespace {
bool GetIPCObject(v8::Isolate* isolate,
v8::Local<v8::Context> context,
bool internal,
v8::Local<v8::Object>* ipc) {
v8::Local<v8::String> key =
mate::StringToV8(isolate, internal ? "ipc-internal" : "ipc");
v8::Local<v8::Private> privateKey = v8::Private::ForApi(isolate, key);
v8::Local<v8::Object> global_object = context->Global();
v8::Local<v8::Value> value;
if (!global_object->GetPrivate(context, privateKey).ToLocal(&value))
return false;
if (value.IsEmpty() || !value->IsObject())
return false;
*ipc = value->ToObject(isolate);
return true;
}
std::vector<v8::Local<v8::Value>> ListValueToVector(
v8::Isolate* isolate,
const base::ListValue& list) {
v8::Local<v8::Value> array = mate::ConvertToV8(isolate, list);
std::vector<v8::Local<v8::Value>> result;
mate::ConvertFromV8(isolate, array, &result);
return result;
}
base::StringPiece NetResourceProvider(int key) {
if (key == IDR_DIR_HEADER_HTML) {
base::StringPiece html_data =
ui::ResourceBundle::GetSharedInstance().GetRawDataResource(
IDR_DIR_HEADER_HTML);
return html_data;
}
return base::StringPiece();
}
} // namespace
AtomRenderFrameObserver::AtomRenderFrameObserver(
content::RenderFrame* frame,
RendererClientBase* renderer_client)
: content::RenderFrameObserver(frame),
render_frame_(frame),
renderer_client_(renderer_client) {
// Initialise resource for directory listing.
net::NetModule::SetResourceProvider(NetResourceProvider);
}
void AtomRenderFrameObserver::DidClearWindowObject() {
renderer_client_->DidClearWindowObject(render_frame_);
}
void AtomRenderFrameObserver::DidCreateDocumentElement() {
document_created_ = true;
}
void AtomRenderFrameObserver::DidCreateScriptContext(
v8::Handle<v8::Context> context,
int world_id) {
if (ShouldNotifyClient(world_id))
renderer_client_->DidCreateScriptContext(context, render_frame_);
if (renderer_client_->isolated_world() && IsMainWorld(world_id) &&
// Only the top window's main frame has isolated world.
render_frame_->IsMainFrame() && !render_frame_->GetWebFrame()->Opener()) {
CreateIsolatedWorldContext();
renderer_client_->SetupMainWorldOverrides(context, render_frame_);
}
}
void AtomRenderFrameObserver::DraggableRegionsChanged() {
blink::WebVector<blink::WebDraggableRegion> webregions =
render_frame_->GetWebFrame()->GetDocument().DraggableRegions();
std::vector<DraggableRegion> regions;
for (auto& webregion : webregions) {
DraggableRegion region;
render_frame_->GetRenderView()->ConvertViewportToWindowViaWidget(
&webregion.bounds);
region.bounds = webregion.bounds;
region.draggable = webregion.draggable;
regions.push_back(region);
}
Send(new AtomFrameHostMsg_UpdateDraggableRegions(routing_id(), regions));
}
void AtomRenderFrameObserver::WillReleaseScriptContext(
v8::Local<v8::Context> context,
int world_id) {
if (ShouldNotifyClient(world_id))
renderer_client_->WillReleaseScriptContext(context, render_frame_);
}
void AtomRenderFrameObserver::OnDestruct() {
delete this;
}
void AtomRenderFrameObserver::CreateIsolatedWorldContext() {
auto* frame = render_frame_->GetWebFrame();
// This maps to the name shown in the context combo box in the Console tab
// of the dev tools.
frame->SetIsolatedWorldHumanReadableName(
World::ISOLATED_WORLD,
blink::WebString::FromUTF8("Electron Isolated Context"));
// Setup document's origin policy in isolated world
frame->SetIsolatedWorldSecurityOrigin(
World::ISOLATED_WORLD, frame->GetDocument().GetSecurityOrigin());
// Create initial script context in isolated world
blink::WebScriptSource source("void 0");
frame->ExecuteScriptInIsolatedWorld(World::ISOLATED_WORLD, source);
}
bool AtomRenderFrameObserver::IsMainWorld(int world_id) {
return world_id == World::MAIN_WORLD;
}
bool AtomRenderFrameObserver::IsIsolatedWorld(int world_id) {
return world_id == World::ISOLATED_WORLD;
}
bool AtomRenderFrameObserver::ShouldNotifyClient(int world_id) {
if (renderer_client_->isolated_world() && render_frame_->IsMainFrame())
return IsIsolatedWorld(world_id);
else
return IsMainWorld(world_id);
}
bool AtomRenderFrameObserver::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(AtomRenderFrameObserver, message)
IPC_MESSAGE_HANDLER(AtomFrameMsg_Message, OnBrowserMessage)
IPC_MESSAGE_HANDLER(AtomFrameMsg_TakeHeapSnapshot, OnTakeHeapSnapshot)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void AtomRenderFrameObserver::OnBrowserMessage(bool internal,
bool send_to_all,
const std::string& channel,
const base::ListValue& args,
int32_t sender_id) {
// Don't handle browser messages before document element is created.
// When we receive a message from the browser, we try to transfer it
// to a web page, and when we do that Blink creates an empty
// document element if it hasn't been created yet, and it makes our init
// script to run while `window.location` is still "about:blank".
if (!document_created_)
return;
blink::WebLocalFrame* frame = render_frame_->GetWebFrame();
if (!frame)
return;
EmitIPCEvent(frame, internal, channel, args, sender_id);
// Also send the message to all sub-frames.
if (send_to_all) {
for (blink::WebFrame* child = frame->FirstChild(); child;
child = child->NextSibling())
if (child->IsWebLocalFrame()) {
EmitIPCEvent(child->ToWebLocalFrame(), internal, channel, args,
sender_id);
}
}
}
void AtomRenderFrameObserver::OnTakeHeapSnapshot(
IPC::PlatformFileForTransit file_handle,
const std::string& channel) {
base::ThreadRestrictions::ScopedAllowIO allow_io;
auto file = IPC::PlatformFileForTransitToFile(file_handle);
bool success = TakeHeapSnapshot(blink::MainThreadIsolate(), &file);
base::ListValue args;
args.AppendString(channel);
args.AppendBoolean(success);
render_frame_->Send(new AtomFrameHostMsg_Message(
render_frame_->GetRoutingID(), "ipc-internal-message", args));
}
void AtomRenderFrameObserver::EmitIPCEvent(blink::WebLocalFrame* frame,
bool internal,
const std::string& channel,
const base::ListValue& args,
int32_t sender_id) {
if (!frame)
return;
v8::Isolate* isolate = blink::MainThreadIsolate();
v8::HandleScope handle_scope(isolate);
v8::Local<v8::Context> context = renderer_client_->GetContext(frame, isolate);
v8::Context::Scope context_scope(context);
// Only emit IPC event for context with node integration.
node::Environment* env = node::Environment::GetCurrent(context);
if (!env)
return;
v8::Local<v8::Object> ipc;
if (GetIPCObject(isolate, context, internal, &ipc)) {
TRACE_EVENT0("devtools.timeline", "FunctionCall");
auto args_vector = ListValueToVector(isolate, args);
// Insert the Event object, event.sender is ipc.
mate::Dictionary event = mate::Dictionary::CreateEmpty(isolate);
event.Set("sender", ipc);
event.Set("senderId", sender_id);
args_vector.insert(args_vector.begin(), event.GetHandle());
mate::EmitEvent(isolate, ipc, channel, args_vector);
}
}
} // namespace atom