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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 "mojo/examples/html_viewer/html_document_view.h"
#include "base/bind.h"
#include "base/location.h"
#include "base/single_thread_task_runner.h"
#include "base/thread_task_runner_handle.h"
#include "mojo/examples/html_viewer/blink_input_events_type_converters.h"
#include "mojo/examples/html_viewer/webstoragenamespace_impl.h"
#include "mojo/examples/html_viewer/weburlloader_impl.h"
#include "mojo/services/public/cpp/view_manager/node.h"
#include "mojo/services/public/cpp/view_manager/view.h"
#include "mojo/services/public/cpp/view_manager/view_observer.h"
#include "skia/ext/refptr.h"
#include "third_party/WebKit/public/web/WebConsoleMessage.h"
#include "third_party/WebKit/public/web/WebDocument.h"
#include "third_party/WebKit/public/web/WebElement.h"
#include "third_party/WebKit/public/web/WebInputEvent.h"
#include "third_party/WebKit/public/web/WebLocalFrame.h"
#include "third_party/WebKit/public/web/WebScriptSource.h"
#include "third_party/WebKit/public/web/WebSettings.h"
#include "third_party/WebKit/public/web/WebView.h"
#include "third_party/skia/include/core/SkCanvas.h"
#include "third_party/skia/include/core/SkColor.h"
#include "third_party/skia/include/core/SkDevice.h"
namespace mojo {
namespace examples {
namespace {
void ConfigureSettings(blink::WebSettings* settings) {
settings->setAcceleratedCompositingEnabled(false);
settings->setDefaultFixedFontSize(13);
settings->setDefaultFontSize(16);
settings->setLoadsImagesAutomatically(true);
settings->setJavaScriptEnabled(true);
}
navigation::Target WebNavigationPolicyToNavigationTarget(
blink::WebNavigationPolicy policy) {
switch (policy) {
case blink::WebNavigationPolicyCurrentTab:
return navigation::SOURCE_NODE;
case blink::WebNavigationPolicyNewBackgroundTab:
case blink::WebNavigationPolicyNewForegroundTab:
case blink::WebNavigationPolicyNewWindow:
case blink::WebNavigationPolicyNewPopup:
return navigation::NEW_NODE;
default:
return navigation::DEFAULT;
}
}
bool CanNavigateLocally(blink::WebFrame* frame,
const blink::WebURLRequest& request) {
// For now, we just load child frames locally.
// TODO(aa): In the future, this should use embedding to connect to a
// different instance of Blink if the frame is cross-origin.
if (frame->parent())
return true;
// If we have extraData() it means we already have the url response
// (presumably because we are being called via Navigate()). In that case we
// can go ahead and navigate locally.
if (request.extraData())
return true;
// Otherwise we don't know if we're the right app to handle this request. Ask
// host to do the navigation for us.
return false;
}
} // namespace
HTMLDocumentView::HTMLDocumentView(ServiceProvider* service_provider,
view_manager::ViewManager* view_manager)
: view_manager_(view_manager),
view_(view_manager::View::Create(view_manager_)),
web_view_(NULL),
root_(NULL),
repaint_pending_(false),
navigator_host_(service_provider),
weak_factory_(this) {
view_->AddObserver(this);
}
HTMLDocumentView::~HTMLDocumentView() {
view_->RemoveObserver(this);
if (web_view_)
web_view_->close();
if (root_)
root_->RemoveObserver(this);
}
void HTMLDocumentView::AttachToNode(view_manager::Node* node) {
root_ = node;
root_->SetActiveView(view_);
view_->SetColor(SK_ColorCYAN); // Dummy background color.
web_view_ = blink::WebView::create(this);
ConfigureSettings(web_view_->settings());
web_view_->setMainFrame(blink::WebLocalFrame::create(this));
web_view_->resize(root_->bounds().size());
root_->AddObserver(this);
}
void HTMLDocumentView::Load(URLResponsePtr response) {
DCHECK(web_view_);
GURL url(response->url);
WebURLRequestExtraData* extra_data = new WebURLRequestExtraData;
extra_data->synthetic_response = response.Pass();
blink::WebURLRequest web_request;
web_request.initialize();
web_request.setURL(url);
web_request.setExtraData(extra_data);
web_view_->mainFrame()->loadRequest(web_request);
}
blink::WebStorageNamespace* HTMLDocumentView::createSessionStorageNamespace() {
return new WebStorageNamespaceImpl();
}
void HTMLDocumentView::didInvalidateRect(const blink::WebRect& rect) {
if (!repaint_pending_) {
repaint_pending_ = true;
base::ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE,
base::Bind(&HTMLDocumentView::Repaint, weak_factory_.GetWeakPtr()));
}
}
bool HTMLDocumentView::allowsBrokenNullLayerTreeView() const {
// TODO(darin): Switch to using compositor bindings.
//
// NOTE: Note to Blink maintainers, feel free to just break this code if it
// is the last using compositor bindings and you want to delete the old path.
//
return true;
}
blink::WebNavigationPolicy HTMLDocumentView::decidePolicyForNavigation(
blink::WebLocalFrame* frame, blink::WebDataSource::ExtraData* data,
const blink::WebURLRequest& request, blink::WebNavigationType nav_type,
blink::WebNavigationPolicy default_policy, bool is_redirect) {
if (CanNavigateLocally(frame, request))
return default_policy;
navigation::NavigationDetailsPtr nav_details(
navigation::NavigationDetails::New());
nav_details->url = request.url().string().utf8();
navigator_host_->RequestNavigate(
view_->node()->id(),
WebNavigationPolicyToNavigationTarget(default_policy),
nav_details.Pass());
return blink::WebNavigationPolicyIgnore;
}
void HTMLDocumentView::didAddMessageToConsole(
const blink::WebConsoleMessage& message,
const blink::WebString& source_name,
unsigned source_line,
const blink::WebString& stack_trace) {
printf("### console: %s\n", std::string(message.text.utf8()).c_str());
}
void HTMLDocumentView::didNavigateWithinPage(
blink::WebLocalFrame* frame, const blink::WebHistoryItem& history_item,
blink::WebHistoryCommitType commit_type) {
navigator_host_->DidNavigateLocally(view_->node()->id(),
history_item.urlString().utf8());
}
void HTMLDocumentView::OnViewInputEvent(view_manager::View* view,
const EventPtr& event) {
scoped_ptr<blink::WebInputEvent> web_event =
TypeConverter<EventPtr, scoped_ptr<blink::WebInputEvent> >::ConvertTo(
event);
if (web_event)
web_view_->handleInputEvent(*web_event);
}
void HTMLDocumentView::OnNodeBoundsChanged(view_manager::Node* node,
const gfx::Rect& old_bounds,
const gfx::Rect& new_bounds) {
DCHECK_EQ(node, root_);
web_view_->resize(node->bounds().size());
}
void HTMLDocumentView::OnNodeDestroyed(view_manager::Node* node) {
DCHECK_EQ(node, root_);
node->RemoveObserver(this);
root_ = NULL;
}
void HTMLDocumentView::Repaint() {
repaint_pending_ = false;
web_view_->animate(0.0);
web_view_->layout();
int width = web_view_->size().width;
int height = web_view_->size().height;
skia::RefPtr<SkCanvas> canvas = skia::AdoptRef(SkCanvas::NewRaster(
SkImageInfo::MakeN32(width, height, kOpaque_SkAlphaType)));
web_view_->paint(canvas.get(), gfx::Rect(0, 0, width, height));
view_->SetContents(canvas->getDevice()->accessBitmap(false));
}
} // namespace examples
} // namespace mojo
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