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// Copyright 2014 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 "content/renderer/mojo_bindings_controller.h"
#include "content/common/view_messages.h"
#include "content/public/renderer/render_frame.h"
#include "content/public/renderer/render_view.h"
#include "content/renderer/mojo_context_state.h"
#include "gin/per_context_data.h"
#include "third_party/WebKit/public/web/WebKit.h"
#include "third_party/WebKit/public/web/WebLocalFrame.h"
#include "third_party/WebKit/public/web/WebView.h"
#include "v8/include/v8.h"
namespace content {
namespace {
const char kMojoContextStateKey[] = "MojoContextState";
struct MojoContextStateData : public base::SupportsUserData::Data {
scoped_ptr<MojoContextState> state;
};
} // namespace
MojoBindingsController::MojoBindingsController(RenderFrame* render_frame,
bool for_layout_tests)
: RenderFrameObserver(render_frame),
RenderFrameObserverTracker<MojoBindingsController>(render_frame),
for_layout_tests_(for_layout_tests) {}
MojoBindingsController::~MojoBindingsController() {
}
void MojoBindingsController::CreateContextState() {
v8::HandleScope handle_scope(blink::mainThreadIsolate());
blink::WebLocalFrame* frame = render_frame()->GetWebFrame();
v8::Local<v8::Context> context = frame->mainWorldScriptContext();
gin::PerContextData* context_data = gin::PerContextData::From(context);
MojoContextStateData* data = new MojoContextStateData;
data->state.reset(new MojoContextState(frame, context, for_layout_tests_));
context_data->SetUserData(kMojoContextStateKey, data);
}
void MojoBindingsController::DestroyContextState(
v8::Local<v8::Context> context) {
gin::PerContextData* context_data = gin::PerContextData::From(context);
if (!context_data)
return;
context_data->RemoveUserData(kMojoContextStateKey);
}
MojoContextState* MojoBindingsController::GetContextState() {
v8::HandleScope handle_scope(blink::mainThreadIsolate());
v8::Local<v8::Context> context =
render_frame()->GetWebFrame()->mainWorldScriptContext();
gin::PerContextData* context_data = gin::PerContextData::From(context);
if (!context_data)
return NULL;
MojoContextStateData* context_state = static_cast<MojoContextStateData*>(
context_data->GetUserData(kMojoContextStateKey));
return context_state ? context_state->state.get() : NULL;
}
void MojoBindingsController::WillReleaseScriptContext(
v8::Local<v8::Context> context,
int world_id) {
DestroyContextState(context);
}
void MojoBindingsController::RunScriptsAtDocumentStart() {
CreateContextState();
}
void MojoBindingsController::RunScriptsAtDocumentReady() {
v8::HandleScope handle_scope(blink::mainThreadIsolate());
MojoContextState* state = GetContextState();
if (state)
state->Run();
}
void MojoBindingsController::DidClearWindowObject() {
// NOTE: this function may be called early on twice. From the constructor
// mainWorldScriptContext() may trigger this to be called. If we are created
// before the page is loaded (which is very likely), then on first load this
// is called. In the case of the latter we may have already supplied the
// handle to the context state so that if we destroy now the handle is
// lost. If this is the result of the first load then the contextstate should
// be empty and we don't need to destroy it.
MojoContextState* state = GetContextState();
if (state && !state->module_added())
return;
v8::HandleScope handle_scope(blink::mainThreadIsolate());
DestroyContextState(render_frame()->GetWebFrame()->mainWorldScriptContext());
}
} // namespace content
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