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// Copyright (c) 2012 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/browser/browser_plugin/browser_plugin_embedder.h"
#include "base/values.h"
#include "content/browser/browser_plugin/browser_plugin_guest.h"
#include "content/browser/renderer_host/render_view_host_impl.h"
#include "content/browser/web_contents/web_contents_impl.h"
#include "content/common/browser_plugin/browser_plugin_constants.h"
#include "content/common/browser_plugin/browser_plugin_messages.h"
#include "content/common/drag_messages.h"
#include "content/common/gpu/gpu_messages.h"
#include "content/public/browser/browser_context.h"
#include "content/public/browser/browser_plugin_guest_manager.h"
#include "content/public/browser/content_browser_client.h"
#include "content/public/browser/native_web_keyboard_event.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/browser/user_metrics.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/result_codes.h"
#include "content/public/common/url_constants.h"
#include "net/base/escape.h"
#include "third_party/WebKit/public/web/WebFindOptions.h"
#include "ui/events/keycodes/keyboard_codes.h"
namespace content {
BrowserPluginEmbedder::BrowserPluginEmbedder(WebContentsImpl* web_contents)
: WebContentsObserver(web_contents),
guest_drag_ending_(false),
weak_ptr_factory_(this) {
}
BrowserPluginEmbedder::~BrowserPluginEmbedder() {
}
// static
BrowserPluginEmbedder* BrowserPluginEmbedder::Create(
WebContentsImpl* web_contents) {
return new BrowserPluginEmbedder(web_contents);
}
void BrowserPluginEmbedder::DragEnteredGuest(BrowserPluginGuest* guest) {
guest_dragging_over_ = guest->AsWeakPtr();
}
void BrowserPluginEmbedder::DragLeftGuest(BrowserPluginGuest* guest) {
// Avoid race conditions in switching between guests being hovered over by
// only un-setting if the caller is marked as the guest being dragged over.
if (guest_dragging_over_.get() == guest) {
guest_dragging_over_.reset();
}
}
void BrowserPluginEmbedder::StartDrag(BrowserPluginGuest* guest) {
guest_started_drag_ = guest->AsWeakPtr();
guest_drag_ending_ = false;
}
WebContentsImpl* BrowserPluginEmbedder::GetWebContents() const {
return static_cast<WebContentsImpl*>(web_contents());
}
BrowserPluginGuestManager*
BrowserPluginEmbedder::GetBrowserPluginGuestManager() const {
return GetWebContents()->GetBrowserContext()->GetGuestManager();
}
void BrowserPluginEmbedder::ClearGuestDragStateIfApplicable() {
// The order at which we observe SystemDragEnded() and DragSourceEndedAt() is
// platform dependent.
// In OSX, we see SystemDragEnded() first, where in aura, we see
// DragSourceEndedAt() first. For this reason, we check if both methods were
// called before resetting |guest_started_drag_|.
if (guest_drag_ending_) {
if (guest_started_drag_)
guest_started_drag_.reset();
} else {
guest_drag_ending_ = true;
}
}
bool BrowserPluginEmbedder::DidSendScreenRectsCallback(
WebContents* guest_web_contents) {
static_cast<RenderViewHostImpl*>(
guest_web_contents->GetRenderViewHost())->SendScreenRects();
// Not handled => Iterate over all guests.
return false;
}
void BrowserPluginEmbedder::DidSendScreenRects() {
GetBrowserPluginGuestManager()->ForEachGuest(
GetWebContents(), base::Bind(
&BrowserPluginEmbedder::DidSendScreenRectsCallback,
base::Unretained(this)));
}
bool BrowserPluginEmbedder::OnMessageReceived(const IPC::Message& message) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(BrowserPluginEmbedder, message)
IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_Attach, OnAttach)
IPC_MESSAGE_HANDLER_GENERIC(DragHostMsg_UpdateDragCursor,
OnUpdateDragCursor(&handled));
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
return handled;
}
void BrowserPluginEmbedder::DragSourceEndedAt(int client_x, int client_y,
int screen_x, int screen_y, blink::WebDragOperation operation) {
if (guest_started_drag_) {
gfx::Point guest_offset =
guest_started_drag_->GetScreenCoordinates(gfx::Point());
guest_started_drag_->DragSourceEndedAt(client_x - guest_offset.x(),
client_y - guest_offset.y(), screen_x, screen_y, operation);
}
ClearGuestDragStateIfApplicable();
}
void BrowserPluginEmbedder::SystemDragEnded() {
// When the embedder's drag/drop operation ends, we need to pass the message
// to the guest that initiated the drag/drop operation. This will ensure that
// the guest's RVH state is reset properly.
if (guest_started_drag_)
guest_started_drag_->EndSystemDrag();
guest_dragging_over_.reset();
ClearGuestDragStateIfApplicable();
}
void BrowserPluginEmbedder::OnUpdateDragCursor(bool* handled) {
*handled = (guest_dragging_over_.get() != NULL);
}
void BrowserPluginEmbedder::OnAttach(
int browser_plugin_instance_id,
const BrowserPluginHostMsg_Attach_Params& params) {
WebContents* guest_web_contents =
GetBrowserPluginGuestManager()->GetGuestByInstanceID(
GetWebContents(), browser_plugin_instance_id);
if (!guest_web_contents)
return;
BrowserPluginGuest* guest = static_cast<WebContentsImpl*>(guest_web_contents)
->GetBrowserPluginGuest();
guest->Attach(browser_plugin_instance_id, GetWebContents(), params);
}
bool BrowserPluginEmbedder::HandleKeyboardEvent(
const NativeWebKeyboardEvent& event) {
if ((event.windowsKeyCode != ui::VKEY_ESCAPE) ||
(event.modifiers & blink::WebInputEvent::InputModifiers)) {
return false;
}
bool event_consumed = false;
GetBrowserPluginGuestManager()->ForEachGuest(
GetWebContents(),
base::Bind(&BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback,
base::Unretained(this),
&event_consumed));
return event_consumed;
}
bool BrowserPluginEmbedder::Find(int request_id,
const base::string16& search_text,
const blink::WebFindOptions& options) {
return GetBrowserPluginGuestManager()->ForEachGuest(
GetWebContents(),
base::Bind(&BrowserPluginEmbedder::FindInGuest,
base::Unretained(this),
request_id,
search_text,
options));
}
bool BrowserPluginEmbedder::UnlockMouseIfNecessaryCallback(bool* mouse_unlocked,
WebContents* guest) {
*mouse_unlocked |= static_cast<WebContentsImpl*>(guest)
->GetBrowserPluginGuest()
->mouse_locked();
guest->GotResponseToLockMouseRequest(false);
// Returns false to iterate over all guests.
return false;
}
bool BrowserPluginEmbedder::FindInGuest(int request_id,
const base::string16& search_text,
const blink::WebFindOptions& options,
WebContents* guest) {
if (static_cast<WebContentsImpl*>(guest)->GetBrowserPluginGuest()->Find(
request_id, search_text, options)) {
// There can only ever currently be one browser plugin that handles find so
// we can break the iteration at this point.
return true;
}
return false;
}
} // namespace content
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