src/apps/shell_window.cc

   1 // Copyright 2013 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 "apps/shell_window.h"
   6
   7 #include "apps/shell_window_geometry_cache.h"
   8 #include "apps/shell_window_registry.h"
   9 #include "apps/ui/native_app_window.h"
  10 #include "base/command_line.h"
  11 #include "base/strings/string_util.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "base/values.h"
  14 #include "chrome/browser/chrome_notification_types.h"
  15 #include "chrome/browser/extensions/extension_system.h"
  16 #include "chrome/browser/extensions/extension_web_contents_observer.h"
  17 #include "chrome/browser/extensions/suggest_permission_util.h"
  18 #include "chrome/browser/lifetime/application_lifetime.h"
  19 #include "chrome/browser/profiles/profile.h"
  20 #include "chrome/common/chrome_switches.h"
  21 #include "chrome/common/extensions/extension_messages.h"
  22 #include "chrome/common/extensions/manifest_handlers/icons_handler.h"
  23 #include "components/web_modal/web_contents_modal_dialog_manager.h"
  24 #include "content/public/browser/invalidate_type.h"
  25 #include "content/public/browser/navigation_entry.h"
  26 #include "content/public/browser/notification_details.h"
  27 #include "content/public/browser/notification_service.h"
  28 #include "content/public/browser/notification_source.h"
  29 #include "content/public/browser/notification_types.h"
  30 #include "content/public/browser/render_view_host.h"
  31 #include "content/public/browser/resource_dispatcher_host.h"
  32 #include "content/public/browser/web_contents.h"
  33 #include "content/public/browser/web_contents_view.h"
  34 #include "content/public/common/media_stream_request.h"
  35 #include "extensions/browser/process_manager.h"
  36 #include "extensions/browser/view_type_utils.h"
  37 #include "extensions/common/extension.h"
  38 #include "third_party/skia/include/core/SkRegion.h"
  39 #include "ui/gfx/screen.h"
  40
  41 #if !defined(OS_MACOSX)
  42 #include "apps/pref_names.h"
  43 #include "base/prefs/pref_service.h"
  44 #endif
  45
  46 using content::ConsoleMessageLevel;
  47 using content::WebContents;
  48 using extensions::APIPermission;
  49 using web_modal::WebContentsModalDialogHost;
  50 using web_modal::WebContentsModalDialogManager;
  51
  52 namespace {
  53
  54 const int kDefaultWidth = 512;
  55 const int kDefaultHeight = 384;
  56
  57 bool IsFullscreen(int fullscreen_types) {
  58   return fullscreen_types != apps::ShellWindow::FULLSCREEN_TYPE_NONE;
  59 }
  60
  61 }  // namespace
  62
  63 namespace apps {
  64
  65 ShellWindow::SizeConstraints::SizeConstraints()
  66     : maximum_size_(kUnboundedSize, kUnboundedSize) {
  67 }
  68
  69 ShellWindow::SizeConstraints::SizeConstraints(const gfx::Size& min_size,
  70                                               const gfx::Size& max_size)
  71     : minimum_size_(min_size),
  72       maximum_size_(max_size) {
  73 }
  74
  75 ShellWindow::SizeConstraints::~SizeConstraints() {}
  76
  77 gfx::Size ShellWindow::SizeConstraints::ClampSize(gfx::Size size) const {
  78   const gfx::Size max_size = GetMaximumSize();
  79   if (max_size.width() != kUnboundedSize)
  80     size.set_width(std::min(size.width(), GetMaximumSize().width()));
  81   if (max_size.height() != kUnboundedSize)
  82     size.set_height(std::min(size.height(), GetMaximumSize().height()));
  83   size.SetToMax(GetMinimumSize());
  84   return size;
  85 }
  86
  87 bool ShellWindow::SizeConstraints::HasMinimumSize() const {
  88   return GetMinimumSize().width() != kUnboundedSize ||
  89       GetMinimumSize().height() != kUnboundedSize;
  90 }
  91
  92 bool ShellWindow::SizeConstraints::HasMaximumSize() const {
  93   const gfx::Size max_size = GetMaximumSize();
  94   return max_size.width() != kUnboundedSize ||
  95       max_size.height() != kUnboundedSize;
  96 }
  97
  98 bool ShellWindow::SizeConstraints::HasFixedSize() const {
  99   return !GetMinimumSize().IsEmpty() && GetMinimumSize() == GetMaximumSize();
 100 }
 101
 102 gfx::Size ShellWindow::SizeConstraints::GetMinimumSize() const {
 103   return minimum_size_;
 104 }
 105
 106 gfx::Size ShellWindow::SizeConstraints::GetMaximumSize() const {
 107   return gfx::Size(
 108       maximum_size_.width() == kUnboundedSize ?
 109           kUnboundedSize :
 110           std::max(maximum_size_.width(), minimum_size_.width()),
 111       maximum_size_.height() == kUnboundedSize ?
 112           kUnboundedSize :
 113           std::max(maximum_size_.height(), minimum_size_.height()));
 114 }
 115
 116 void ShellWindow::SizeConstraints::set_minimum_size(const gfx::Size& min_size) {
 117   minimum_size_ = min_size;
 118 }
 119
 120 void ShellWindow::SizeConstraints::set_maximum_size(const gfx::Size& max_size) {
 121   maximum_size_ = max_size;
 122 }
 123
 124 ShellWindow::CreateParams::CreateParams()
 125   : window_type(ShellWindow::WINDOW_TYPE_DEFAULT),
 126     frame(ShellWindow::FRAME_CHROME),
 127     transparent_background(false),
 128     bounds(INT_MIN, INT_MIN, 0, 0),
 129     creator_process_id(0),
 130     state(ui::SHOW_STATE_DEFAULT),
 131     hidden(false),
 132     resizable(true),
 133     focused(true),
 134     always_on_top(false) {}
 135
 136 ShellWindow::CreateParams::~CreateParams() {}
 137
 138 ShellWindow::Delegate::~Delegate() {}
 139
 140 ShellWindow::ShellWindow(Profile* profile,
 141                          Delegate* delegate,
 142                          const extensions::Extension* extension)
 143     : profile_(profile),
 144       extension_(extension),
 145       extension_id_(extension->id()),
 146       window_type_(WINDOW_TYPE_DEFAULT),
 147       delegate_(delegate),
 148       image_loader_ptr_factory_(this),
 149       fullscreen_types_(FULLSCREEN_TYPE_NONE),
 150       show_on_first_paint_(false),
 151       first_paint_complete_(false),
 152       cached_always_on_top_(false) {
 153   CHECK(!profile->IsGuestSession() || profile->IsOffTheRecord())
 154       << "Only off the record window may be opened in the guest mode.";
 155 }
 156
 157 void ShellWindow::Init(const GURL& url,
 158                        ShellWindowContents* shell_window_contents,
 159                        const CreateParams& params) {
 160   // Initialize the render interface and web contents
 161   shell_window_contents_.reset(shell_window_contents);
 162   shell_window_contents_->Initialize(profile(), url);
 163   WebContents* web_contents = shell_window_contents_->GetWebContents();
 164   if (CommandLine::ForCurrentProcess()->HasSwitch(
 165         switches::kEnableAppsShowOnFirstPaint)) {
 166     content::WebContentsObserver::Observe(web_contents);
 167   }
 168   delegate_->InitWebContents(web_contents);
 169   WebContentsModalDialogManager::CreateForWebContents(web_contents);
 170   extensions::ExtensionWebContentsObserver::CreateForWebContents(web_contents);
 171
 172   web_contents->SetDelegate(this);
 173   WebContentsModalDialogManager::FromWebContents(web_contents)->
 174       SetDelegate(this);
 175   extensions::SetViewType(web_contents, extensions::VIEW_TYPE_APP_SHELL);
 176
 177   // Initialize the window
 178   CreateParams new_params = LoadDefaultsAndConstrain(params);
 179   window_type_ = new_params.window_type;
 180   window_key_ = new_params.window_key;
 181   size_constraints_ = SizeConstraints(new_params.minimum_size,
 182                                       new_params.maximum_size);
 183
 184   // Windows cannot be always-on-top in fullscreen mode for security reasons.
 185   cached_always_on_top_ = new_params.always_on_top;
 186   if (new_params.state == ui::SHOW_STATE_FULLSCREEN)
 187     new_params.always_on_top = false;
 188
 189   native_app_window_.reset(delegate_->CreateNativeAppWindow(this, new_params));
 190
 191   if (!new_params.hidden) {
 192     // Panels are not activated by default.
 193     Show(window_type_is_panel() || !new_params.focused ? SHOW_INACTIVE
 194                                                        : SHOW_ACTIVE);
 195   }
 196
 197   if (new_params.state == ui::SHOW_STATE_FULLSCREEN)
 198     Fullscreen();
 199   else if (new_params.state == ui::SHOW_STATE_MAXIMIZED)
 200     Maximize();
 201   else if (new_params.state == ui::SHOW_STATE_MINIMIZED)
 202     Minimize();
 203
 204   OnNativeWindowChanged();
 205
 206   // When the render view host is changed, the native window needs to know
 207   // about it in case it has any setup to do to make the renderer appear
 208   // properly. In particular, on Windows, the view's clickthrough region needs
 209   // to be set.
 210   registrar_.Add(this, chrome::NOTIFICATION_EXTENSION_UNLOADED,
 211                  content::Source<Profile>(profile_));
 212   // Close when the browser process is exiting.
 213   registrar_.Add(this, chrome::NOTIFICATION_APP_TERMINATING,
 214                  content::NotificationService::AllSources());
 215
 216   shell_window_contents_->LoadContents(new_params.creator_process_id);
 217
 218   if (CommandLine::ForCurrentProcess()->HasSwitch(
 219         switches::kEnableAppsShowOnFirstPaint)) {
 220     // We want to show the window only when the content has been painted. For
 221     // that to happen, we need to define a size for the content, otherwise the
 222     // layout will happen in a 0x0 area.
 223     // Note: WebContents::GetView() is guaranteed to be non-null.
 224     web_contents->GetView()->SizeContents(new_params.bounds.size());
 225   }
 226
 227   // Prevent the browser process from shutting down while this window is open.
 228   chrome::StartKeepAlive();
 229
 230   UpdateExtensionAppIcon();
 231
 232   ShellWindowRegistry::Get(profile_)->AddShellWindow(this);
 233 }
 234
 235 ShellWindow::~ShellWindow() {
 236   // Unregister now to prevent getting NOTIFICATION_APP_TERMINATING if we're the
 237   // last window open.
 238   registrar_.RemoveAll();
 239
 240   // Remove shutdown prevention.
 241   chrome::EndKeepAlive();
 242 }
 243
 244 void ShellWindow::RequestMediaAccessPermission(
 245     content::WebContents* web_contents,
 246     const content::MediaStreamRequest& request,
 247     const content::MediaResponseCallback& callback) {
 248   delegate_->RequestMediaAccessPermission(web_contents, request, callback,
 249                                           extension());
 250 }
 251
 252 WebContents* ShellWindow::OpenURLFromTab(WebContents* source,
 253                                          const content::OpenURLParams& params) {
 254   // Don't allow the current tab to be navigated. It would be nice to map all
 255   // anchor tags (even those without target="_blank") to new tabs, but right
 256   // now we can't distinguish between those and <meta> refreshes or window.href
 257   // navigations, which we don't want to allow.
 258   // TOOD(mihaip): Can we check for user gestures instead?
 259   WindowOpenDisposition disposition = params.disposition;
 260   if (disposition == CURRENT_TAB) {
 261     AddMessageToDevToolsConsole(
 262         content::CONSOLE_MESSAGE_LEVEL_ERROR,
 263         base::StringPrintf(
 264             "Can't open same-window link to \"%s\"; try target=\"_blank\".",
 265             params.url.spec().c_str()));
 266     return NULL;
 267   }
 268
 269   // These dispositions aren't really navigations.
 270   if (disposition == SUPPRESS_OPEN || disposition == SAVE_TO_DISK ||
 271       disposition == IGNORE_ACTION) {
 272     return NULL;
 273   }
 274
 275   WebContents* contents = delegate_->OpenURLFromTab(profile_, source,
 276                                                     params);
 277   if (!contents) {
 278     AddMessageToDevToolsConsole(
 279         content::CONSOLE_MESSAGE_LEVEL_ERROR,
 280         base::StringPrintf(
 281             "Can't navigate to \"%s\"; apps do not support navigation.",
 282             params.url.spec().c_str()));
 283   }
 284
 285   return contents;
 286 }
 287
 288 void ShellWindow::AddNewContents(WebContents* source,
 289                                  WebContents* new_contents,
 290                                  WindowOpenDisposition disposition,
 291                                  const gfx::Rect& initial_pos,
 292                                  bool user_gesture,
 293                                  bool* was_blocked) {
 294   DCHECK(Profile::FromBrowserContext(new_contents->GetBrowserContext()) ==
 295       profile_);
 296   delegate_->AddNewContents(profile_, new_contents, disposition,
 297                             initial_pos, user_gesture, was_blocked);
 298 }
 299
 300 bool ShellWindow::PreHandleKeyboardEvent(
 301     content::WebContents* source,
 302     const content::NativeWebKeyboardEvent& event,
 303     bool* is_keyboard_shortcut) {
 304   // Here, we can handle a key event before the content gets it. When we are
 305   // fullscreen and it is not forced, we want to allow the user to leave
 306   // when ESC is pressed.
 307   // However, if the application has the "overrideEscFullscreen" permission, we
 308   // should let it override that behavior.
 309   // ::HandleKeyboardEvent() will only be called if the KeyEvent's default
 310   // action is not prevented.
 311   // Thus, we should handle the KeyEvent here only if the permission is not set.
 312   if (event.windowsKeyCode == ui::VKEY_ESCAPE &&
 313       (fullscreen_types_ != FULLSCREEN_TYPE_NONE) &&
 314       ((fullscreen_types_ & FULLSCREEN_TYPE_FORCED) == 0) &&
 315       !extension_->HasAPIPermission(APIPermission::kOverrideEscFullscreen)) {
 316     Restore();
 317     return true;
 318   }
 319
 320   return false;
 321 }
 322
 323 void ShellWindow::HandleKeyboardEvent(
 324     WebContents* source,
 325     const content::NativeWebKeyboardEvent& event) {
 326   // If the window is currently fullscreen and not forced, ESC should leave
 327   // fullscreen.  If this code is being called for ESC, that means that the
 328   // KeyEvent's default behavior was not prevented by the content.
 329   if (event.windowsKeyCode == ui::VKEY_ESCAPE &&
 330       (fullscreen_types_ != FULLSCREEN_TYPE_NONE) &&
 331       ((fullscreen_types_ & FULLSCREEN_TYPE_FORCED) == 0)) {
 332     Restore();
 333     return;
 334   }
 335
 336   native_app_window_->HandleKeyboardEvent(event);
 337 }
 338
 339 void ShellWindow::RequestToLockMouse(WebContents* web_contents,
 340                                      bool user_gesture,
 341                                      bool last_unlocked_by_target) {
 342   bool has_permission = IsExtensionWithPermissionOrSuggestInConsole(
 343       APIPermission::kPointerLock,
 344       extension_,
 345       web_contents->GetRenderViewHost());
 346
 347   web_contents->GotResponseToLockMouseRequest(has_permission);
 348 }
 349
 350 void ShellWindow::DidFirstVisuallyNonEmptyPaint(int32 page_id) {
 351   first_paint_complete_ = true;
 352   if (show_on_first_paint_) {
 353     DCHECK(delayed_show_type_ == SHOW_ACTIVE ||
 354            delayed_show_type_ == SHOW_INACTIVE);
 355     Show(delayed_show_type_);
 356   }
 357 }
 358
 359 void ShellWindow::OnNativeClose() {
 360   ShellWindowRegistry::Get(profile_)->RemoveShellWindow(this);
 361   if (shell_window_contents_) {
 362     WebContents* web_contents = shell_window_contents_->GetWebContents();
 363     WebContentsModalDialogManager::FromWebContents(web_contents)->
 364         SetDelegate(NULL);
 365     shell_window_contents_->NativeWindowClosed();
 366   }
 367   delete this;
 368 }
 369
 370 void ShellWindow::OnNativeWindowChanged() {
 371   SaveWindowPosition();
 372
 373 #if defined(OS_WIN)
 374   if (native_app_window_ &&
 375       cached_always_on_top_ &&
 376       !IsFullscreen(fullscreen_types_) &&
 377       !native_app_window_->IsMaximized() &&
 378       !native_app_window_->IsMinimized()) {
 379     UpdateNativeAlwaysOnTop();
 380   }
 381 #endif
 382
 383   if (shell_window_contents_ && native_app_window_)
 384     shell_window_contents_->NativeWindowChanged(native_app_window_.get());
 385 }
 386
 387 void ShellWindow::OnNativeWindowActivated() {
 388   ShellWindowRegistry::Get(profile_)->ShellWindowActivated(this);
 389 }
 390
 391 content::WebContents* ShellWindow::web_contents() const {
 392   return shell_window_contents_->GetWebContents();
 393 }
 394
 395 NativeAppWindow* ShellWindow::GetBaseWindow() {
 396   return native_app_window_.get();
 397 }
 398
 399 gfx::NativeWindow ShellWindow::GetNativeWindow() {
 400   return GetBaseWindow()->GetNativeWindow();
 401 }
 402
 403 gfx::Rect ShellWindow::GetClientBounds() const {
 404   gfx::Rect bounds = native_app_window_->GetBounds();
 405   bounds.Inset(native_app_window_->GetFrameInsets());
 406   return bounds;
 407 }
 408
 409 base::string16 ShellWindow::GetTitle() const {
 410   // WebContents::GetTitle() will return the page's URL if there's no <title>
 411   // specified. However, we'd prefer to show the name of the extension in that
 412   // case, so we directly inspect the NavigationEntry's title.
 413   base::string16 title;
 414   if (!web_contents() ||
 415       !web_contents()->GetController().GetActiveEntry() ||
 416       web_contents()->GetController().GetActiveEntry()->GetTitle().empty()) {
 417     title = base::UTF8ToUTF16(extension()->name());
 418   } else {
 419     title = web_contents()->GetTitle();
 420   }
 421   const base::char16 kBadChars[] = { '\n', 0 };
 422   base::RemoveChars(title, kBadChars, &title);
 423   return title;
 424 }
 425
 426 void ShellWindow::SetAppIconUrl(const GURL& url) {
 427   // Avoid using any previous app icons were are being downloaded.
 428   image_loader_ptr_factory_.InvalidateWeakPtrs();
 429
 430   // Reset |app_icon_image_| to abort pending image load (if any).
 431   app_icon_image_.reset();
 432
 433   app_icon_url_ = url;
 434   web_contents()->DownloadImage(
 435       url,
 436       true,  // is a favicon
 437       0,  // no maximum size
 438       base::Bind(&ShellWindow::DidDownloadFavicon,
 439                  image_loader_ptr_factory_.GetWeakPtr()));
 440 }
 441
 442 void ShellWindow::UpdateShape(scoped_ptr<SkRegion> region) {
 443   native_app_window_->UpdateShape(region.Pass());
 444 }
 445
 446 void ShellWindow::UpdateDraggableRegions(
 447     const std::vector<extensions::DraggableRegion>& regions) {
 448   native_app_window_->UpdateDraggableRegions(regions);
 449 }
 450
 451 void ShellWindow::UpdateAppIcon(const gfx::Image& image) {
 452   if (image.IsEmpty())
 453     return;
 454   app_icon_ = image;
 455   native_app_window_->UpdateWindowIcon();
 456   ShellWindowRegistry::Get(profile_)->ShellWindowIconChanged(this);
 457 }
 458
 459 void ShellWindow::Fullscreen() {
 460 #if !defined(OS_MACOSX)
 461   // Do not enter fullscreen mode if disallowed by pref.
 462   if (!profile()->GetPrefs()->GetBoolean(prefs::kAppFullscreenAllowed))
 463     return;
 464 #endif
 465   fullscreen_types_ |= FULLSCREEN_TYPE_WINDOW_API;
 466   SetNativeWindowFullscreen();
 467 }
 468
 469 void ShellWindow::Maximize() {
 470   GetBaseWindow()->Maximize();
 471 }
 472
 473 void ShellWindow::Minimize() {
 474   GetBaseWindow()->Minimize();
 475 }
 476
 477 void ShellWindow::Restore() {
 478   if (IsFullscreen(fullscreen_types_)) {
 479     fullscreen_types_ = FULLSCREEN_TYPE_NONE;
 480     SetNativeWindowFullscreen();
 481   } else {
 482     GetBaseWindow()->Restore();
 483   }
 484 }
 485
 486 void ShellWindow::OSFullscreen() {
 487 #if !defined(OS_MACOSX)
 488   // Do not enter fullscreen mode if disallowed by pref.
 489   if (!profile()->GetPrefs()->GetBoolean(prefs::kAppFullscreenAllowed))
 490     return;
 491 #endif
 492   fullscreen_types_ |= FULLSCREEN_TYPE_OS;
 493   SetNativeWindowFullscreen();
 494 }
 495
 496 void ShellWindow::ForcedFullscreen() {
 497   fullscreen_types_ |= FULLSCREEN_TYPE_FORCED;
 498   SetNativeWindowFullscreen();
 499 }
 500
 501 void ShellWindow::SetMinimumSize(const gfx::Size& min_size) {
 502   size_constraints_.set_minimum_size(min_size);
 503   OnSizeConstraintsChanged();
 504 }
 505
 506 void ShellWindow::SetMaximumSize(const gfx::Size& max_size) {
 507   size_constraints_.set_maximum_size(max_size);
 508   OnSizeConstraintsChanged();
 509 }
 510
 511 void ShellWindow::Show(ShowType show_type) {
 512   if (CommandLine::ForCurrentProcess()->HasSwitch(
 513         switches::kEnableAppsShowOnFirstPaint)) {
 514     show_on_first_paint_ = true;
 515
 516     if (!first_paint_complete_) {
 517       delayed_show_type_ = show_type;
 518       return;
 519     }
 520   }
 521
 522   switch (show_type) {
 523     case SHOW_ACTIVE:
 524       GetBaseWindow()->Show();
 525       break;
 526     case SHOW_INACTIVE:
 527       GetBaseWindow()->ShowInactive();
 528       break;
 529   }
 530 }
 531
 532 void ShellWindow::Hide() {
 533   // This is there to prevent race conditions with Hide() being called before
 534   // there was a non-empty paint. It should have no effect in a non-racy
 535   // scenario where the application is hiding then showing a window: the second
 536   // show will not be delayed.
 537   show_on_first_paint_ = false;
 538   GetBaseWindow()->Hide();
 539 }
 540
 541 void ShellWindow::SetAlwaysOnTop(bool always_on_top) {
 542   if (cached_always_on_top_ == always_on_top)
 543     return;
 544
 545   cached_always_on_top_ = always_on_top;
 546
 547   // As a security measure, do not allow fullscreen windows or windows that
 548   // overlap the taskbar to be on top. The property will be applied when the
 549   // window exits fullscreen and moves away from the taskbar.
 550   if (!IsFullscreen(fullscreen_types_) && !IntersectsWithTaskbar())
 551     native_app_window_->SetAlwaysOnTop(always_on_top);
 552
 553   OnNativeWindowChanged();
 554 }
 555
 556 bool ShellWindow::IsAlwaysOnTop() const {
 557   return cached_always_on_top_;
 558 }
 559
 560 //------------------------------------------------------------------------------
 561 // Private methods
 562
 563 void ShellWindow::DidDownloadFavicon(
 564     int id,
 565     int http_status_code,
 566     const GURL& image_url,
 567     const std::vector<SkBitmap>& bitmaps,
 568     const std::vector<gfx::Size>& original_bitmap_sizes) {
 569   if (image_url != app_icon_url_ || bitmaps.empty())
 570     return;
 571
 572   // Bitmaps are ordered largest to smallest. Choose the smallest bitmap
 573   // whose height >= the preferred size.
 574   int largest_index = 0;
 575   for (size_t i = 1; i < bitmaps.size(); ++i) {
 576     if (bitmaps[i].height() < delegate_->PreferredIconSize())
 577       break;
 578     largest_index = i;
 579   }
 580   const SkBitmap& largest = bitmaps[largest_index];
 581   UpdateAppIcon(gfx::Image::CreateFrom1xBitmap(largest));
 582 }
 583
 584 void ShellWindow::OnExtensionIconImageChanged(extensions::IconImage* image) {
 585   DCHECK_EQ(app_icon_image_.get(), image);
 586
 587   UpdateAppIcon(gfx::Image(app_icon_image_->image_skia()));
 588 }
 589
 590 void ShellWindow::UpdateExtensionAppIcon() {
 591   // Avoid using any previous app icons were are being downloaded.
 592   image_loader_ptr_factory_.InvalidateWeakPtrs();
 593
 594   app_icon_image_.reset(new extensions::IconImage(
 595       profile(),
 596       extension(),
 597       extensions::IconsInfo::GetIcons(extension()),
 598       delegate_->PreferredIconSize(),
 599       extensions::IconsInfo::GetDefaultAppIcon(),
 600       this));
 601
 602   // Triggers actual image loading with 1x resources. The 2x resource will
 603   // be handled by IconImage class when requested.
 604   app_icon_image_->image_skia().GetRepresentation(1.0f);
 605 }
 606
 607 void ShellWindow::OnSizeConstraintsChanged() {
 608   native_app_window_->UpdateWindowMinMaxSize();
 609   gfx::Rect bounds = GetClientBounds();
 610   gfx::Size constrained_size = size_constraints_.ClampSize(bounds.size());
 611   if (bounds.size() != constrained_size) {
 612     bounds.set_size(constrained_size);
 613     native_app_window_->SetBounds(bounds);
 614   }
 615   OnNativeWindowChanged();
 616 }
 617
 618 void ShellWindow::SetNativeWindowFullscreen() {
 619   native_app_window_->SetFullscreen(fullscreen_types_);
 620
 621   if (cached_always_on_top_)
 622     UpdateNativeAlwaysOnTop();
 623 }
 624
 625 bool ShellWindow::IntersectsWithTaskbar() const {
 626 #if defined(OS_WIN)
 627   gfx::Screen* screen = gfx::Screen::GetNativeScreen();
 628   gfx::Rect window_bounds = native_app_window_->GetRestoredBounds();
 629   std::vector<gfx::Display> displays = screen->GetAllDisplays();
 630
 631   for (std::vector<gfx::Display>::const_iterator it = displays.begin();
 632        it != displays.end(); ++it) {
 633     gfx::Rect taskbar_bounds = it->bounds();
 634     taskbar_bounds.Subtract(it->work_area());
 635     if (taskbar_bounds.IsEmpty())
 636       continue;
 637
 638     if (window_bounds.Intersects(taskbar_bounds))
 639       return true;
 640   }
 641 #endif
 642
 643   return false;
 644 }
 645
 646 void ShellWindow::UpdateNativeAlwaysOnTop() {
 647   DCHECK(cached_always_on_top_);
 648   bool is_on_top = native_app_window_->IsAlwaysOnTop();
 649   bool fullscreen = IsFullscreen(fullscreen_types_);
 650   bool intersects_taskbar = IntersectsWithTaskbar();
 651
 652   if (is_on_top && (fullscreen || intersects_taskbar)) {
 653     // When entering fullscreen or overlapping the taskbar, ensure windows are
 654     // not always-on-top.
 655     native_app_window_->SetAlwaysOnTop(false);
 656   } else if (!is_on_top && !fullscreen && !intersects_taskbar) {
 657     // When exiting fullscreen and moving away from the taskbar, reinstate
 658     // always-on-top.
 659     native_app_window_->SetAlwaysOnTop(true);
 660   }
 661 }
 662
 663 void ShellWindow::CloseContents(WebContents* contents) {
 664   native_app_window_->Close();
 665 }
 666
 667 bool ShellWindow::ShouldSuppressDialogs() {
 668   return true;
 669 }
 670
 671 content::ColorChooser* ShellWindow::OpenColorChooser(
 672       WebContents* web_contents,
 673       SkColor initial_color,
 674       const std::vector<content::ColorSuggestion>& suggestionss) {
 675   return delegate_->ShowColorChooser(web_contents, initial_color);
 676 }
 677
 678 void ShellWindow::RunFileChooser(WebContents* tab,
 679                                  const content::FileChooserParams& params) {
 680   if (window_type_is_panel()) {
 681     // Panels can't host a file dialog, abort. TODO(stevenjb): allow file
 682     // dialogs to be unhosted but still close with the owning web contents.
 683     // crbug.com/172502.
 684     LOG(WARNING) << "File dialog opened by panel.";
 685     return;
 686   }
 687
 688   delegate_->RunFileChooser(tab, params);
 689 }
 690
 691 bool ShellWindow::IsPopupOrPanel(const WebContents* source) const {
 692   return true;
 693 }
 694
 695 void ShellWindow::MoveContents(WebContents* source, const gfx::Rect& pos) {
 696   native_app_window_->SetBounds(pos);
 697 }
 698
 699 void ShellWindow::NavigationStateChanged(
 700     const content::WebContents* source, unsigned changed_flags) {
 701   if (changed_flags & content::INVALIDATE_TYPE_TITLE)
 702     native_app_window_->UpdateWindowTitle();
 703   else if (changed_flags & content::INVALIDATE_TYPE_TAB)
 704     native_app_window_->UpdateWindowIcon();
 705 }
 706
 707 void ShellWindow::ToggleFullscreenModeForTab(content::WebContents* source,
 708                                              bool enter_fullscreen) {
 709 #if !defined(OS_MACOSX)
 710   // Do not enter fullscreen mode if disallowed by pref.
 711   // TODO(bartfab): Add a test once it becomes possible to simulate a user
 712   // gesture. http://crbug.com/174178
 713   if (enter_fullscreen &&
 714       !profile()->GetPrefs()->GetBoolean(prefs::kAppFullscreenAllowed)) {
 715     return;
 716   }
 717 #endif
 718
 719   if (!IsExtensionWithPermissionOrSuggestInConsole(
 720       APIPermission::kFullscreen,
 721       extension_,
 722       source->GetRenderViewHost())) {
 723     return;
 724   }
 725
 726   if (enter_fullscreen)
 727     fullscreen_types_ |= FULLSCREEN_TYPE_HTML_API;
 728   else
 729     fullscreen_types_ &= ~FULLSCREEN_TYPE_HTML_API;
 730   SetNativeWindowFullscreen();
 731 }
 732
 733 bool ShellWindow::IsFullscreenForTabOrPending(
 734     const content::WebContents* source) const {
 735   return ((fullscreen_types_ & FULLSCREEN_TYPE_HTML_API) != 0);
 736 }
 737
 738 void ShellWindow::Observe(int type,
 739                           const content::NotificationSource& source,
 740                           const content::NotificationDetails& details) {
 741   switch (type) {
 742     case chrome::NOTIFICATION_EXTENSION_UNLOADED: {
 743       const extensions::Extension* unloaded_extension =
 744           content::Details<extensions::UnloadedExtensionInfo>(
 745               details)->extension;
 746       if (extension_ == unloaded_extension)
 747         native_app_window_->Close();
 748       break;
 749     }
 750     case chrome::NOTIFICATION_APP_TERMINATING:
 751       native_app_window_->Close();
 752       break;
 753     default:
 754       NOTREACHED() << "Received unexpected notification";
 755   }
 756 }
 757
 758 void ShellWindow::SetWebContentsBlocked(content::WebContents* web_contents,
 759                                         bool blocked) {
 760   delegate_->SetWebContentsBlocked(web_contents, blocked);
 761 }
 762
 763 bool ShellWindow::IsWebContentsVisible(content::WebContents* web_contents) {
 764   return delegate_->IsWebContentsVisible(web_contents);
 765 }
 766
 767 extensions::ActiveTabPermissionGranter*
 768     ShellWindow::GetActiveTabPermissionGranter() {
 769   // Shell windows don't support the activeTab permission.
 770   return NULL;
 771 }
 772
 773 WebContentsModalDialogHost* ShellWindow::GetWebContentsModalDialogHost() {
 774   return native_app_window_.get();
 775 }
 776
 777 void ShellWindow::AddMessageToDevToolsConsole(ConsoleMessageLevel level,
 778                                               const std::string& message) {
 779   content::RenderViewHost* rvh = web_contents()->GetRenderViewHost();
 780   rvh->Send(new ExtensionMsg_AddMessageToConsole(
 781       rvh->GetRoutingID(), level, message));
 782 }
 783
 784 void ShellWindow::SaveWindowPosition() {
 785   if (window_key_.empty())
 786     return;
 787   if (!native_app_window_)
 788     return;
 789
 790   ShellWindowGeometryCache* cache = ShellWindowGeometryCache::Get(profile());
 791
 792   gfx::Rect bounds = native_app_window_->GetRestoredBounds();
 793   bounds.Inset(native_app_window_->GetFrameInsets());
 794   gfx::Rect screen_bounds =
 795       gfx::Screen::GetNativeScreen()->GetDisplayMatching(bounds).work_area();
 796   ui::WindowShowState window_state = native_app_window_->GetRestoredState();
 797   cache->SaveGeometry(extension()->id(),
 798                       window_key_,
 799                       bounds,
 800                       screen_bounds,
 801                       window_state);
 802 }
 803
 804 void ShellWindow::AdjustBoundsToBeVisibleOnScreen(
 805     const gfx::Rect& cached_bounds,
 806     const gfx::Rect& cached_screen_bounds,
 807     const gfx::Rect& current_screen_bounds,
 808     const gfx::Size& minimum_size,
 809     gfx::Rect* bounds) const {
 810   *bounds = cached_bounds;
 811
 812   // Reposition and resize the bounds if the cached_screen_bounds is different
 813   // from the current screen bounds and the current screen bounds doesn't
 814   // completely contain the bounds.
 815   if (cached_screen_bounds != current_screen_bounds &&
 816       !current_screen_bounds.Contains(cached_bounds)) {
 817     bounds->set_width(
 818         std::max(minimum_size.width(),
 819                  std::min(bounds->width(), current_screen_bounds.width())));
 820     bounds->set_height(
 821         std::max(minimum_size.height(),
 822                  std::min(bounds->height(), current_screen_bounds.height())));
 823     bounds->set_x(
 824         std::max(current_screen_bounds.x(),
 825                  std::min(bounds->x(),
 826                           current_screen_bounds.right() - bounds->width())));
 827     bounds->set_y(
 828         std::max(current_screen_bounds.y(),
 829                  std::min(bounds->y(),
 830                           current_screen_bounds.bottom() - bounds->height())));
 831   }
 832 }
 833
 834 ShellWindow::CreateParams ShellWindow::LoadDefaultsAndConstrain(
 835     CreateParams params) const {
 836   if (params.bounds.width() == 0)
 837     params.bounds.set_width(kDefaultWidth);
 838   if (params.bounds.height() == 0)
 839     params.bounds.set_height(kDefaultHeight);
 840
 841   // If left and top are left undefined, the native shell window will center
 842   // the window on the main screen in a platform-defined manner.
 843
 844   // Load cached state if it exists.
 845   if (!params.window_key.empty()) {
 846     ShellWindowGeometryCache* cache = ShellWindowGeometryCache::Get(profile());
 847
 848     gfx::Rect cached_bounds;
 849     gfx::Rect cached_screen_bounds;
 850     ui::WindowShowState cached_state = ui::SHOW_STATE_DEFAULT;
 851     if (cache->GetGeometry(extension()->id(), params.window_key,
 852                            &cached_bounds, &cached_screen_bounds,
 853                            &cached_state)) {
 854       // App window has cached screen bounds, make sure it fits on screen in
 855       // case the screen resolution changed.
 856       gfx::Screen* screen = gfx::Screen::GetNativeScreen();
 857       gfx::Display display = screen->GetDisplayMatching(cached_bounds);
 858       gfx::Rect current_screen_bounds = display.work_area();
 859       AdjustBoundsToBeVisibleOnScreen(cached_bounds,
 860                                       cached_screen_bounds,
 861                                       current_screen_bounds,
 862                                       params.minimum_size,
 863                                       &params.bounds);
 864       params.state = cached_state;
 865     }
 866   }
 867
 868   SizeConstraints size_constraints(params.minimum_size, params.maximum_size);
 869   params.bounds.set_size(size_constraints.ClampSize(params.bounds.size()));
 870   params.minimum_size = size_constraints.GetMinimumSize();
 871   params.maximum_size = size_constraints.GetMaximumSize();
 872
 873   return params;
 874 }
 875
 876 // static
 877 SkRegion* ShellWindow::RawDraggableRegionsToSkRegion(
 878       const std::vector<extensions::DraggableRegion>& regions) {
 879   SkRegion* sk_region = new SkRegion;
 880   for (std::vector<extensions::DraggableRegion>::const_iterator iter =
 881            regions.begin();
 882        iter != regions.end(); ++iter) {
 883     const extensions::DraggableRegion& region = *iter;
 884     sk_region->op(
 885         region.bounds.x(),
 886         region.bounds.y(),
 887         region.bounds.right(),
 888         region.bounds.bottom(),
 889         region.draggable ? SkRegion::kUnion_Op : SkRegion::kDifference_Op);
 890   }
 891   return sk_region;
 892 }
 893
 894 }  // namespace apps