1// Copyright (c) 2012 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "chrome/browser/ui/panels/panel_host.h"
6
7#include "base/bind.h"
8#include "base/logging.h"
9#include "base/message_loop/message_loop.h"
10#include "chrome/browser/chrome_notification_types.h"
11#include "chrome/browser/chrome_page_zoom.h"
12#include "chrome/browser/extensions/extension_web_contents_observer.h"
13#include "chrome/browser/extensions/window_controller.h"
14#include "chrome/browser/favicon/favicon_tab_helper.h"
15#include "chrome/browser/profiles/profile.h"
16#include "chrome/browser/sessions/session_tab_helper.h"
17#include "chrome/browser/ui/browser_navigator.h"
18#include "chrome/browser/ui/panels/panel.h"
19#include "chrome/browser/ui/prefs/prefs_tab_helper.h"
20#include "chrome/common/extensions/extension_messages.h"
21#include "content/public/browser/invalidate_type.h"
22#include "content/public/browser/navigation_controller.h"
23#include "content/public/browser/notification_service.h"
24#include "content/public/browser/notification_source.h"
25#include "content/public/browser/notification_types.h"
26#include "content/public/browser/render_view_host.h"
27#include "content/public/browser/site_instance.h"
28#include "content/public/browser/user_metrics.h"
29#include "content/public/browser/web_contents.h"
30#include "extensions/browser/view_type_utils.h"
31#include "ipc/ipc_message.h"
32#include "ipc/ipc_message_macros.h"
33#include "ui/gfx/image/image.h"
34#include "ui/gfx/rect.h"
35
36using content::UserMetricsAction;
37
38PanelHost::PanelHost(Panel* panel, Profile* profile)
39    : panel_(panel),
40      profile_(profile),
41      extension_function_dispatcher_(profile, this),
42      weak_factory_(this) {
43}
44
45PanelHost::~PanelHost() {
46}
47
48void PanelHost::Init(const GURL& url) {
49  if (url.is_empty())
50    return;
51
52  content::WebContents::CreateParams create_params(
53      profile_, content::SiteInstance::CreateForURL(profile_, url));
54  web_contents_.reset(content::WebContents::Create(create_params));
55  extensions::SetViewType(web_contents_.get(), extensions::VIEW_TYPE_PANEL);
56  web_contents_->SetDelegate(this);
57  content::WebContentsObserver::Observe(web_contents_.get());
58
59  // Needed to give the web contents a Tab ID. Extension APIs
60  // expect web contents to have a Tab ID.
61  SessionTabHelper::CreateForWebContents(web_contents_.get());
62  SessionTabHelper::FromWebContents(web_contents_.get())->SetWindowID(
63      panel_->session_id());
64
65  FaviconTabHelper::CreateForWebContents(web_contents_.get());
66  PrefsTabHelper::CreateForWebContents(web_contents_.get());
67  extensions::ExtensionWebContentsObserver::CreateForWebContents(
68      web_contents_.get());
69
70  web_contents_->GetController().LoadURL(
71      url, content::Referrer(), content::PAGE_TRANSITION_LINK, std::string());
72}
73
74void PanelHost::DestroyWebContents() {
75  // Cannot do a web_contents_.reset() because web_contents_.get() will
76  // still return the pointer when we CHECK in WebContentsDestroyed (or if
77  // we get called back in the middle of web contents destruction, which
78  // WebView might do when it detects the web contents is destroyed).
79  content::WebContents* contents = web_contents_.release();
80  delete contents;
81}
82
83gfx::Image PanelHost::GetPageIcon() const {
84  if (!web_contents_.get())
85    return gfx::Image();
86
87  FaviconTabHelper* favicon_tab_helper =
88      FaviconTabHelper::FromWebContents(web_contents_.get());
89  CHECK(favicon_tab_helper);
90  return favicon_tab_helper->GetFavicon();
91}
92
93content::WebContents* PanelHost::OpenURLFromTab(
94    content::WebContents* source,
95    const content::OpenURLParams& params) {
96  // These dispositions aren't really navigations.
97  if (params.disposition == SUPPRESS_OPEN ||
98      params.disposition == SAVE_TO_DISK ||
99      params.disposition == IGNORE_ACTION)
100    return NULL;
101
102  // Only allow clicks on links.
103  if (params.transition != content::PAGE_TRANSITION_LINK)
104    return NULL;
105
106  // Force all links to open in a new tab.
107  chrome::NavigateParams navigate_params(profile_,
108                                         params.url,
109                                         params.transition);
110  switch (params.disposition) {
111    case NEW_BACKGROUND_TAB:
112    case NEW_WINDOW:
113    case OFF_THE_RECORD:
114      navigate_params.disposition = params.disposition;
115      break;
116    default:
117      navigate_params.disposition = NEW_FOREGROUND_TAB;
118      break;
119  }
120  chrome::Navigate(&navigate_params);
121  return navigate_params.target_contents;
122}
123
124void PanelHost::NavigationStateChanged(const content::WebContents* source,
125                                       unsigned changed_flags) {
126  // Only need to update the title if the title changed while not loading,
127  // because the title is also updated when loading state changes.
128  if ((changed_flags & content::INVALIDATE_TYPE_TAB) ||
129      ((changed_flags & content::INVALIDATE_TYPE_TITLE) &&
130       !source->IsLoading()))
131    panel_->UpdateTitleBar();
132}
133
134void PanelHost::AddNewContents(content::WebContents* source,
135                               content::WebContents* new_contents,
136                               WindowOpenDisposition disposition,
137                               const gfx::Rect& initial_pos,
138                               bool user_gesture,
139                               bool* was_blocked) {
140  chrome::NavigateParams navigate_params(profile_, new_contents->GetURL(),
141                                         content::PAGE_TRANSITION_LINK);
142  navigate_params.target_contents = new_contents;
143
144  // Force all links to open in a new tab, even if they were trying to open a
145  // window.
146  navigate_params.disposition =
147      disposition == NEW_BACKGROUND_TAB ? disposition : NEW_FOREGROUND_TAB;
148
149  navigate_params.window_bounds = initial_pos;
150  navigate_params.user_gesture = user_gesture;
151  navigate_params.extension_app_id = panel_->extension_id();
152  chrome::Navigate(&navigate_params);
153}
154
155void PanelHost::ActivateContents(content::WebContents* contents) {
156  panel_->Activate();
157}
158
159void PanelHost::DeactivateContents(content::WebContents* contents) {
160  panel_->Deactivate();
161}
162
163void PanelHost::LoadingStateChanged(content::WebContents* source) {
164  bool is_loading = source->IsLoading();
165  panel_->LoadingStateChanged(is_loading);
166}
167
168void PanelHost::CloseContents(content::WebContents* source) {
169  panel_->Close();
170}
171
172void PanelHost::MoveContents(content::WebContents* source,
173                             const gfx::Rect& pos) {
174  panel_->SetBounds(pos);
175}
176
177bool PanelHost::IsPopupOrPanel(const content::WebContents* source) const {
178  return true;
179}
180
181void PanelHost::ContentsZoomChange(bool zoom_in) {
182  Zoom(zoom_in ? content::PAGE_ZOOM_IN : content::PAGE_ZOOM_OUT);
183}
184
185void PanelHost::HandleKeyboardEvent(
186    content::WebContents* source,
187    const content::NativeWebKeyboardEvent& event) {
188  return panel_->HandleKeyboardEvent(event);
189}
190
191void PanelHost::WebContentsFocused(content::WebContents* contents) {
192  panel_->WebContentsFocused(contents);
193}
194
195void PanelHost::ResizeDueToAutoResize(content::WebContents* web_contents,
196                                      const gfx::Size& new_size) {
197  panel_->OnContentsAutoResized(new_size);
198}
199
200void PanelHost::RenderViewCreated(content::RenderViewHost* render_view_host) {
201  extensions::WindowController* window = GetExtensionWindowController();
202  render_view_host->Send(new ExtensionMsg_UpdateBrowserWindowId(
203      render_view_host->GetRoutingID(), window->GetWindowId()));
204}
205
206void PanelHost::RenderProcessGone(base::TerminationStatus status) {
207  CloseContents(web_contents_.get());
208}
209
210void PanelHost::WebContentsDestroyed(content::WebContents* web_contents) {
211  // Web contents should only be destroyed by us.
212  CHECK(!web_contents_.get());
213
214  // Close the panel after we return to the message loop (not immediately,
215  // otherwise, it may destroy this object before the stack has a chance
216  // to cleanly unwind.)
217  base::MessageLoop::current()->PostTask(
218      FROM_HERE,
219      base::Bind(&PanelHost::ClosePanel, weak_factory_.GetWeakPtr()));
220}
221
222void PanelHost::ClosePanel() {
223  panel_->Close();
224}
225
226bool PanelHost::OnMessageReceived(const IPC::Message& message) {
227  bool handled = true;
228  IPC_BEGIN_MESSAGE_MAP(PanelHost, message)
229    IPC_MESSAGE_HANDLER(ExtensionHostMsg_Request, OnRequest)
230    IPC_MESSAGE_UNHANDLED(handled = false)
231  IPC_END_MESSAGE_MAP()
232  return handled;
233}
234
235void PanelHost::OnRequest(const ExtensionHostMsg_Request_Params& params) {
236  if (!web_contents_.get())
237    return;
238
239  extension_function_dispatcher_.Dispatch(params,
240                                          web_contents_->GetRenderViewHost());
241}
242
243extensions::WindowController* PanelHost::GetExtensionWindowController() const {
244  return panel_->extension_window_controller();
245}
246
247content::WebContents* PanelHost::GetAssociatedWebContents() const {
248  return web_contents_.get();
249}
250
251void PanelHost::Reload() {
252  content::RecordAction(UserMetricsAction("Reload"));
253  web_contents_->GetController().Reload(true);
254}
255
256void PanelHost::ReloadIgnoringCache() {
257  content::RecordAction(UserMetricsAction("ReloadIgnoringCache"));
258  web_contents_->GetController().ReloadIgnoringCache(true);
259}
260
261void PanelHost::StopLoading() {
262  content::RecordAction(UserMetricsAction("Stop"));
263  web_contents_->Stop();
264}
265
266void PanelHost::Zoom(content::PageZoom zoom) {
267  chrome_page_zoom::Zoom(web_contents_.get(), zoom);
268}
269