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// Copyright 2013 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 "chrome/browser/guestview/guestview.h"
#include "base/lazy_instance.h"
#include "chrome/browser/extensions/event_router.h"
#include "chrome/browser/guestview/guestview_constants.h"
#include "chrome/browser/profiles/profile.h"
#include "content/public/browser/render_process_host.h"
#include "content/public/browser/web_contents.h"
using content::WebContents;
namespace {
// <embedder_process_id, guest_instance_id> => GuestView*
typedef std::map<std::pair<int, int>, GuestView*> EmbedderGuestViewMap;
static base::LazyInstance<EmbedderGuestViewMap> embedder_guestview_map =
LAZY_INSTANCE_INITIALIZER;
typedef std::map<WebContents*, GuestView*> WebContentsGuestViewMap;
static base::LazyInstance<WebContentsGuestViewMap> webcontents_guestview_map =
LAZY_INSTANCE_INITIALIZER;
} // namespace
GuestView::Event::Event(const std::string& event_name,
scoped_ptr<DictionaryValue> args)
: event_name_(event_name),
args_(args.Pass()) {
}
GuestView::Event::~Event() {
}
scoped_ptr<DictionaryValue> GuestView::Event::GetArguments() {
return args_.Pass();
}
GuestView::GuestView(WebContents* guest_web_contents)
: guest_web_contents_(guest_web_contents),
embedder_web_contents_(NULL),
embedder_render_process_id_(0),
browser_context_(guest_web_contents->GetBrowserContext()),
guest_instance_id_(guest_web_contents->GetEmbeddedInstanceID()),
view_instance_id_(guestview::kInstanceIDNone) {
webcontents_guestview_map.Get().insert(
std::make_pair(guest_web_contents, this));
}
// static
GuestView* GuestView::FromWebContents(WebContents* web_contents) {
WebContentsGuestViewMap* guest_map = webcontents_guestview_map.Pointer();
WebContentsGuestViewMap::iterator it = guest_map->find(web_contents);
return it == guest_map->end() ? NULL : it->second;
}
// static
GuestView* GuestView::From(int embedder_process_id, int guest_instance_id) {
EmbedderGuestViewMap* guest_map = embedder_guestview_map.Pointer();
EmbedderGuestViewMap::iterator it = guest_map->find(
std::make_pair(embedder_process_id, guest_instance_id));
return it == guest_map->end() ? NULL : it->second;
}
void GuestView::Attach(content::WebContents* embedder_web_contents,
const std::string& extension_id,
int view_instance_id,
const base::DictionaryValue& args) {
embedder_web_contents_ = embedder_web_contents;
embedder_render_process_id_ =
embedder_web_contents->GetRenderProcessHost()->GetID();
extension_id_ = extension_id;
view_instance_id_ = view_instance_id;
std::pair<int, int> key(embedder_render_process_id_, guest_instance_id_);
embedder_guestview_map.Get().insert(std::make_pair(key, this));
// GuestView::Attach is called prior to initialization (and initial
// navigation) of the guest in the content layer in order to permit mapping
// the necessary associations between the <*view> element and its guest. This
// is needed by the <webview> WebRequest API to allow intercepting resource
// requests during navigation. However, queued events should be fired after
// content layer initialization in order to ensure that load events (such as
// 'loadstop') fire in embedder after the contentWindow is available.
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&GuestView::SendQueuedEvents,
base::Unretained(this)));
}
GuestView::Type GuestView::GetViewType() const {
return GuestView::UNKNOWN;
}
WebViewGuest* GuestView::AsWebView() {
return NULL;
}
AdViewGuest* GuestView::AsAdView() {
return NULL;
}
GuestView::~GuestView() {
std::pair<int, int> key(embedder_render_process_id_, guest_instance_id_);
embedder_guestview_map.Get().erase(key);
webcontents_guestview_map.Get().erase(guest_web_contents());
while (!pending_events_.empty()) {
delete pending_events_.front();
pending_events_.pop();
}
}
void GuestView::DispatchEvent(Event* event) {
if (!attached()) {
pending_events_.push(event);
return;
}
Profile* profile = Profile::FromBrowserContext(browser_context_);
extensions::EventFilteringInfo info;
info.SetURL(GURL());
info.SetInstanceID(guest_instance_id_);
scoped_ptr<ListValue> args(new ListValue());
args->Append(event->GetArguments().release());
extensions::EventRouter::DispatchEvent(
embedder_web_contents_, profile, extension_id_,
event->event_name(), args.Pass(),
extensions::EventRouter::USER_GESTURE_UNKNOWN, info);
delete event;
}
void GuestView::SendQueuedEvents() {
if (!attached())
return;
while (!pending_events_.empty()) {
Event* event = pending_events_.front();
pending_events_.pop();
DispatchEvent(event);
}
}
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