chrome/browser/ui/views/panels/panel_view.cc

   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/views/panels/panel_view.h"
   6
   7 #include <map>
   8 #include "base/logging.h"
   9 #include "base/message_loop/message_loop.h"
  10 #include "base/strings/utf_string_conversions.h"
  11 #include "chrome/app/chrome_command_ids.h"
  12 #include "chrome/browser/profiles/profile.h"
  13 #include "chrome/browser/ui/host_desktop.h"
  14 #include "chrome/browser/ui/panels/panel.h"
  15 #include "chrome/browser/ui/panels/panel_bounds_animation.h"
  16 #include "chrome/browser/ui/panels/panel_manager.h"
  17 #include "chrome/browser/ui/panels/stacked_panel_collection.h"
  18 #include "chrome/browser/ui/views/panels/panel_frame_view.h"
  19 #include "content/public/browser/render_view_host.h"
  20 #include "content/public/browser/render_widget_host_view.h"
  21 #include "content/public/browser/web_contents.h"
  22 #include "content/public/browser/web_contents_view.h"
  23 #include "ui/gfx/image/image.h"
  24 #include "ui/gfx/path.h"
  25 #include "ui/gfx/screen.h"
  26 #include "ui/views/controls/button/image_button.h"
  27 #include "ui/views/controls/webview/webview.h"
  28 #include "ui/views/widget/widget.h"
  29
  30 #if defined(OS_WIN)
  31 #include "base/win/windows_version.h"
  32 #include "chrome/browser/shell_integration.h"
  33 #include "chrome/browser/ui/views/panels/taskbar_window_thumbnailer_win.h"
  34 #include "ui/base/win/shell.h"
  35 #include "ui/gfx/icon_util.h"
  36 #include "ui/views/win/hwnd_util.h"
  37 #endif
  38
  39 namespace {
  40
  41 #if defined(OS_WIN)
  42 // If the height of a stacked panel shrinks below this threshold during the
  43 // user resizing, it will be treated as minimized.
  44 const int kStackedPanelHeightShrinkThresholdToBecomeMinimized =
  45     panel::kTitlebarHeight + 20;
  46 #endif
  47
  48 // Supported accelerators.
  49 // Note: We can't use the acclerator table defined in chrome/browser/ui/views
  50 // due to checkdeps violation.
  51 struct AcceleratorMapping {
  52   ui::KeyboardCode keycode;
  53   int modifiers;
  54   int command_id;
  55 };
  56 const AcceleratorMapping kPanelAcceleratorMap[] = {
  57   { ui::VKEY_W, ui::EF_CONTROL_DOWN, IDC_CLOSE_WINDOW },
  58   { ui::VKEY_W, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN, IDC_CLOSE_WINDOW },
  59   { ui::VKEY_F4, ui::EF_ALT_DOWN, IDC_CLOSE_WINDOW },
  60   { ui::VKEY_R, ui::EF_CONTROL_DOWN, IDC_RELOAD },
  61   { ui::VKEY_F5, ui::EF_NONE, IDC_RELOAD },
  62   { ui::VKEY_R, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
  63       IDC_RELOAD_IGNORING_CACHE },
  64   { ui::VKEY_F5, ui::EF_CONTROL_DOWN, IDC_RELOAD_IGNORING_CACHE },
  65   { ui::VKEY_F5, ui::EF_SHIFT_DOWN, IDC_RELOAD_IGNORING_CACHE },
  66   { ui::VKEY_ESCAPE, ui::EF_NONE, IDC_STOP },
  67   { ui::VKEY_OEM_MINUS, ui::EF_CONTROL_DOWN, IDC_ZOOM_MINUS },
  68   { ui::VKEY_SUBTRACT, ui::EF_CONTROL_DOWN, IDC_ZOOM_MINUS },
  69   { ui::VKEY_0, ui::EF_CONTROL_DOWN, IDC_ZOOM_NORMAL },
  70   { ui::VKEY_NUMPAD0, ui::EF_CONTROL_DOWN, IDC_ZOOM_NORMAL },
  71   { ui::VKEY_OEM_PLUS, ui::EF_CONTROL_DOWN, IDC_ZOOM_PLUS },
  72   { ui::VKEY_ADD, ui::EF_CONTROL_DOWN, IDC_ZOOM_PLUS },
  73   { ui::VKEY_I, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN, IDC_DEV_TOOLS },
  74   { ui::VKEY_J, ui::EF_SHIFT_DOWN | ui::EF_CONTROL_DOWN,
  75     IDC_DEV_TOOLS_CONSOLE },
  76 };
  77
  78 const std::map<ui::Accelerator, int>& GetAcceleratorTable() {
  79   static std::map<ui::Accelerator, int>* accelerators = NULL;
  80   if (!accelerators) {
  81     accelerators = new std::map<ui::Accelerator, int>();
  82     for (size_t i = 0; i < arraysize(kPanelAcceleratorMap); ++i) {
  83       ui::Accelerator accelerator(kPanelAcceleratorMap[i].keycode,
  84                                   kPanelAcceleratorMap[i].modifiers);
  85       (*accelerators)[accelerator] = kPanelAcceleratorMap[i].command_id;
  86     }
  87   }
  88   return *accelerators;
  89 }
  90
  91 // NativePanelTesting implementation.
  92 class NativePanelTestingWin : public NativePanelTesting {
  93  public:
  94   explicit NativePanelTestingWin(PanelView* panel_view);
  95
  96  private:
  97   virtual void PressLeftMouseButtonTitlebar(
  98       const gfx::Point& mouse_location, panel::ClickModifier modifier) OVERRIDE;
  99   virtual void ReleaseMouseButtonTitlebar(
 100       panel::ClickModifier modifier) OVERRIDE;
 101   virtual void DragTitlebar(const gfx::Point& mouse_location) OVERRIDE;
 102   virtual void CancelDragTitlebar() OVERRIDE;
 103   virtual void FinishDragTitlebar() OVERRIDE;
 104   virtual bool VerifyDrawingAttention() const OVERRIDE;
 105   virtual bool VerifyActiveState(bool is_active) OVERRIDE;
 106   virtual bool VerifyAppIcon() const OVERRIDE;
 107   virtual bool VerifySystemMinimizeState() const OVERRIDE;
 108   virtual bool IsWindowVisible() const OVERRIDE;
 109   virtual bool IsWindowSizeKnown() const OVERRIDE;
 110   virtual bool IsAnimatingBounds() const OVERRIDE;
 111   virtual bool IsButtonVisible(
 112       panel::TitlebarButtonType button_type) const OVERRIDE;
 113   virtual panel::CornerStyle GetWindowCornerStyle() const OVERRIDE;
 114   virtual bool EnsureApplicationRunOnForeground() OVERRIDE;
 115
 116   PanelView* panel_view_;
 117 };
 118
 119 NativePanelTestingWin::NativePanelTestingWin(PanelView* panel_view)
 120     : panel_view_(panel_view) {
 121 }
 122
 123 void NativePanelTestingWin::PressLeftMouseButtonTitlebar(
 124     const gfx::Point& mouse_location, panel::ClickModifier modifier) {
 125   panel_view_->OnTitlebarMousePressed(mouse_location);
 126 }
 127
 128 void NativePanelTestingWin::ReleaseMouseButtonTitlebar(
 129     panel::ClickModifier modifier) {
 130   panel_view_->OnTitlebarMouseReleased(modifier);
 131 }
 132
 133 void NativePanelTestingWin::DragTitlebar(const gfx::Point& mouse_location) {
 134   panel_view_->OnTitlebarMouseDragged(mouse_location);
 135 }
 136
 137 void NativePanelTestingWin::CancelDragTitlebar() {
 138   panel_view_->OnTitlebarMouseCaptureLost();
 139 }
 140
 141 void NativePanelTestingWin::FinishDragTitlebar() {
 142   panel_view_->OnTitlebarMouseReleased(panel::NO_MODIFIER);
 143 }
 144
 145 bool NativePanelTestingWin::VerifyDrawingAttention() const {
 146   base::MessageLoop::current()->RunUntilIdle();
 147   return panel_view_->GetFrameView()->GetPaintState() ==
 148          PanelFrameView::PAINT_FOR_ATTENTION;
 149 }
 150
 151 bool NativePanelTestingWin::VerifyActiveState(bool is_active) {
 152   return panel_view_->GetFrameView()->GetPaintState() ==
 153          (is_active ? PanelFrameView::PAINT_AS_ACTIVE
 154                     : PanelFrameView::PAINT_AS_INACTIVE);
 155 }
 156
 157 bool NativePanelTestingWin::VerifyAppIcon() const {
 158 #if defined(OS_WIN)
 159   // We only care about Windows 7 and later.
 160   if (base::win::GetVersion() < base::win::VERSION_WIN7)
 161     return true;
 162
 163   HWND native_window = views::HWNDForWidget(panel_view_->window());
 164   HICON app_icon = reinterpret_cast<HICON>(
 165       ::SendMessage(native_window, WM_GETICON, ICON_BIG, 0L));
 166   if (!app_icon)
 167     return false;
 168   scoped_ptr<SkBitmap> bitmap(IconUtil::CreateSkBitmapFromHICON(app_icon));
 169   return bitmap.get() &&
 170          bitmap->width() == panel::kPanelAppIconSize &&
 171          bitmap->height() == panel::kPanelAppIconSize;
 172 #else
 173   return true;
 174 #endif
 175 }
 176
 177 bool NativePanelTestingWin::VerifySystemMinimizeState() const {
 178 #if defined(OS_WIN)
 179   HWND native_window = views::HWNDForWidget(panel_view_->window());
 180   WINDOWPLACEMENT placement;
 181   if (!::GetWindowPlacement(native_window, &placement))
 182     return false;
 183   if (placement.showCmd == SW_MINIMIZE || placement.showCmd == SW_SHOWMINIMIZED)
 184     return true;
 185
 186   // If the panel window has owner window, as in stacked mode, check its owner
 187   // window. Note that owner window, instead of parent window, is returned
 188   // though GWL_HWNDPARENT contains 'parent'.
 189   HWND owner_window =
 190       reinterpret_cast<HWND>(::GetWindowLongPtr(native_window,
 191                                                 GWLP_HWNDPARENT));
 192   if (!owner_window || !::GetWindowPlacement(owner_window, &placement))
 193     return false;
 194   return placement.showCmd == SW_MINIMIZE ||
 195          placement.showCmd == SW_SHOWMINIMIZED;
 196 #else
 197   return true;
 198 #endif
 199 }
 200
 201 bool NativePanelTestingWin::IsWindowVisible() const {
 202 #if defined(OS_WIN)
 203   HWND native_window = views::HWNDForWidget(panel_view_->window());
 204   return ::IsWindowVisible(native_window) == TRUE;
 205 #else
 206   return panel_view_->visible();
 207 #endif
 208 }
 209
 210 bool NativePanelTestingWin::IsWindowSizeKnown() const {
 211   return true;
 212 }
 213
 214 bool NativePanelTestingWin::IsAnimatingBounds() const {
 215   return panel_view_->IsAnimatingBounds();
 216 }
 217
 218 bool NativePanelTestingWin::IsButtonVisible(
 219     panel::TitlebarButtonType button_type) const {
 220   PanelFrameView* frame_view = panel_view_->GetFrameView();
 221
 222   switch (button_type) {
 223     case panel::CLOSE_BUTTON:
 224       return frame_view->close_button()->visible();
 225     case panel::MINIMIZE_BUTTON:
 226       return frame_view->minimize_button()->visible();
 227     case panel::RESTORE_BUTTON:
 228       return frame_view->restore_button()->visible();
 229     default:
 230       NOTREACHED();
 231   }
 232   return false;
 233 }
 234
 235 panel::CornerStyle NativePanelTestingWin::GetWindowCornerStyle() const {
 236   return panel_view_->GetFrameView()->corner_style();
 237 }
 238
 239 bool NativePanelTestingWin::EnsureApplicationRunOnForeground() {
 240   // Not needed on views.
 241   return true;
 242 }
 243
 244 }  // namespace
 245
 246 // static
 247 NativePanel* Panel::CreateNativePanel(Panel* panel,
 248                                       const gfx::Rect& bounds,
 249                                       bool always_on_top) {
 250   return new PanelView(panel, bounds, always_on_top);
 251 }
 252
 253 // The panel window has to be created as always-on-top. We cannot create it
 254 // as non-always-on-top and then change it to always-on-top because Windows
 255 // system might deny making a window always-on-top if the application is not
 256 // a foreground application.
 257 PanelView::PanelView(Panel* panel, const gfx::Rect& bounds, bool always_on_top)
 258     : panel_(panel),
 259       bounds_(bounds),
 260       window_(NULL),
 261       window_closed_(false),
 262       web_view_(NULL),
 263       always_on_top_(always_on_top),
 264       focused_(false),
 265       user_resizing_(false),
 266 #if defined(OS_WIN)
 267       user_resizing_interior_stacked_panel_edge_(false),
 268 #endif
 269       mouse_pressed_(false),
 270       mouse_dragging_state_(NO_DRAGGING),
 271       is_drawing_attention_(false),
 272       force_to_paint_as_inactive_(false),
 273       old_focused_view_(NULL) {
 274   window_ = new views::Widget;
 275   views::Widget::InitParams params(views::Widget::InitParams::TYPE_WINDOW);
 276   params.delegate = this;
 277   params.remove_standard_frame = true;
 278   params.keep_on_top = always_on_top;
 279   params.bounds = bounds;
 280   window_->Init(params);
 281   window_->set_frame_type(views::Widget::FRAME_TYPE_FORCE_CUSTOM);
 282   window_->set_focus_on_creation(false);
 283   window_->AddObserver(this);
 284
 285   web_view_ = new views::WebView(NULL);
 286   AddChildView(web_view_);
 287
 288   // Register accelarators supported by panels.
 289   views::FocusManager* focus_manager = GetFocusManager();
 290   const std::map<ui::Accelerator, int>& accelerator_table =
 291       GetAcceleratorTable();
 292   for (std::map<ui::Accelerator, int>::const_iterator iter =
 293            accelerator_table.begin();
 294        iter != accelerator_table.end(); ++iter) {
 295     focus_manager->RegisterAccelerator(
 296         iter->first, ui::AcceleratorManager::kNormalPriority, this);
 297   }
 298
 299 #if defined(OS_WIN)
 300   ui::win::SetAppIdForWindow(
 301       ShellIntegration::GetAppModelIdForProfile(
 302           base::UTF8ToWide(panel->app_name()), panel->profile()->GetPath()),
 303       views::HWNDForWidget(window_));
 304   ui::win::PreventWindowFromPinning(views::HWNDForWidget(window_));
 305 #endif
 306 }
 307
 308 PanelView::~PanelView() {
 309 }
 310
 311 void PanelView::ShowPanel() {
 312   ShowPanelInactive();
 313   ActivatePanel();
 314 }
 315
 316 void PanelView::ShowPanelInactive() {
 317   if (window_->IsVisible())
 318     return;
 319   window_->ShowInactive();
 320   // No animation is used for initial creation of a panel on Win.
 321   // Signal immediately that pending actions can be performed.
 322   panel_->manager()->OnPanelAnimationEnded(panel_.get());
 323 }
 324
 325 gfx::Rect PanelView::GetPanelBounds() const {
 326   return bounds_;
 327 }
 328
 329 void PanelView::SetPanelBounds(const gfx::Rect& bounds) {
 330   SetBoundsInternal(bounds, true);
 331 }
 332
 333 void PanelView::SetPanelBoundsInstantly(const gfx::Rect& bounds) {
 334   SetBoundsInternal(bounds, false);
 335 }
 336
 337 void PanelView::SetBoundsInternal(const gfx::Rect& new_bounds, bool animate) {
 338   if (bounds_ == new_bounds)
 339     return;
 340
 341   bounds_ = new_bounds;
 342
 343   if (!animate) {
 344     // If no animation is in progress, apply bounds change instantly. Otherwise,
 345     // continue the animation with new target bounds.
 346     if (!IsAnimatingBounds())
 347       SetWidgetBounds(bounds_);
 348     return;
 349   }
 350
 351   animation_start_bounds_ = window_->GetWindowBoundsInScreen();
 352
 353   bounds_animator_.reset(new PanelBoundsAnimation(
 354       this, panel_.get(), animation_start_bounds_, new_bounds));
 355   bounds_animator_->Start();
 356 }
 357
 358 #if defined(OS_WIN)
 359 bool PanelView::FilterMessage(HWND hwnd,
 360                               UINT message,
 361                               WPARAM w_param,
 362                               LPARAM l_param,
 363                               LRESULT* l_result) {
 364   switch (message) {
 365     case WM_SIZING:
 366       if (w_param == WMSZ_BOTTOM)
 367         user_resizing_interior_stacked_panel_edge_ = true;
 368       break;
 369   }
 370   return false;
 371 }
 372 #endif
 373
 374 void PanelView::AnimationEnded(const gfx::Animation* animation) {
 375   panel_->manager()->OnPanelAnimationEnded(panel_.get());
 376 }
 377
 378 void PanelView::AnimationProgressed(const gfx::Animation* animation) {
 379   gfx::Rect new_bounds = bounds_animator_->CurrentValueBetween(
 380       animation_start_bounds_, bounds_);
 381   SetWidgetBounds(new_bounds);
 382 }
 383
 384 void PanelView::SetWidgetBounds(const gfx::Rect& new_bounds) {
 385 #if defined(OS_WIN)
 386   // An overlapped window is a top-level window that has a titlebar, border,
 387   // and client area. The Windows system will automatically put the shadow
 388   // around the whole window. Also the system will enforce the minimum height
 389   // (38 pixels based on observation) for the overlapped window such that it
 390   // will always has the space for the titlebar.
 391   //
 392   // On contrast, a popup window is a bare minimum window without border and
 393   // titlebar by default. It is often used for the popup menu and the window
 394   // with short life. The Windows system does not add the shadow around the
 395   // whole window though CS_DROPSHADOW class style could be passed to add the
 396   // drop shadow which is only around the right and bottom edges.
 397   //
 398   // The height of the title-only or minimized panel is smaller than the minimum
 399   // overlapped window height. If the panel still uses the overlapped window
 400   // style, Windows system will automatically increase the window height. To
 401   // work around this limitation, we temporarily change the window style to
 402   // popup when the height to set is smaller than the minimum overlapped window
 403   // height and then restore the window style to overlapped when the height
 404   // grows.
 405   static const int kMinimumOverlappedWindowHeight = 38;
 406   gfx::Rect old_bounds = GetWidget()->GetRestoredBounds();
 407   if (old_bounds.height() > kMinimumOverlappedWindowHeight &&
 408       new_bounds.height() <= kMinimumOverlappedWindowHeight) {
 409     // When the panel height shrinks below the minimum overlapped window height,
 410     // change the window style to popup such that we can show the title-only
 411     // and minimized panel without additional height being added by the system.
 412     UpdateWindowAttribute(GWL_STYLE,
 413                           WS_POPUP,
 414                           WS_OVERLAPPED | WS_THICKFRAME | WS_SYSMENU,
 415                           true);
 416   } else if (old_bounds.height() <= kMinimumOverlappedWindowHeight &&
 417              new_bounds.height() > kMinimumOverlappedWindowHeight) {
 418     // Change the window style back to overlappped when the panel height grow
 419     // taller than the minimum overlapped window height.
 420     UpdateWindowAttribute(GWL_STYLE,
 421                           WS_OVERLAPPED | WS_THICKFRAME | WS_SYSMENU,
 422                           WS_POPUP,
 423                           true);
 424   }
 425 #endif
 426
 427   GetWidget()->SetBounds(new_bounds);
 428 }
 429
 430 void PanelView::ClosePanel() {
 431   // We're already closing. Do nothing.
 432   if (window_closed_)
 433     return;
 434
 435   if (!panel_->ShouldCloseWindow())
 436     return;
 437
 438   // Cancel any currently running animation since we're closing down.
 439   if (bounds_animator_.get())
 440     bounds_animator_.reset();
 441
 442   if (panel_->GetWebContents()) {
 443     // Still have web contents. Allow renderer to shut down.
 444     // When web contents are destroyed, we will be called back again.
 445     panel_->OnWindowClosing();
 446     return;
 447   }
 448
 449   panel_->OnNativePanelClosed();
 450   if (window_)
 451     window_->Close();
 452   window_closed_ = true;
 453 }
 454
 455 void PanelView::ActivatePanel() {
 456   window_->Activate();
 457 }
 458
 459 void PanelView::DeactivatePanel() {
 460   if (!focused_)
 461     return;
 462
 463 #if defined(OS_WIN)
 464   // Need custom behavior for always-on-top panels to avoid
 465   // the OS activating a minimized panel when this one is
 466   // deactivated.
 467   if (always_on_top_) {
 468     ::SetForegroundWindow(::GetDesktopWindow());
 469     return;
 470   }
 471 #endif
 472
 473   window_->Deactivate();
 474 }
 475
 476 bool PanelView::IsPanelActive() const {
 477   return focused_;
 478 }
 479
 480 void PanelView::PreventActivationByOS(bool prevent_activation) {
 481 #if defined(OS_WIN)
 482   // Set the flags "NoActivate" to make sure the minimized panels do not get
 483   // activated by the OS. In addition, set "AppWindow" to make sure the
 484   // minimized panels do appear in the taskbar and Alt-Tab menu if it is not
 485   // in a stack.
 486   int value_to_change = WS_EX_NOACTIVATE;
 487   if (!panel_->stack())
 488     value_to_change |= WS_EX_APPWINDOW;
 489   if (prevent_activation)
 490     UpdateWindowAttribute(GWL_EXSTYLE, value_to_change, 0, false);
 491   else
 492     UpdateWindowAttribute(GWL_EXSTYLE, 0, value_to_change, false);
 493 #endif
 494 }
 495
 496 gfx::NativeWindow PanelView::GetNativePanelWindow() {
 497   return window_->GetNativeWindow();
 498 }
 499
 500 void PanelView::UpdatePanelTitleBar() {
 501   UpdateWindowTitle();
 502   UpdateWindowIcon();
 503 }
 504
 505 void PanelView::UpdatePanelLoadingAnimations(bool should_animate) {
 506   GetFrameView()->UpdateThrobber();
 507 }
 508
 509 void PanelView::PanelWebContentsFocused(content::WebContents* contents) {
 510   web_view_->OnWebContentsFocused(contents);
 511 }
 512
 513 void PanelView::PanelCut() {
 514   // Nothing to do since we do not have panel-specific system menu.
 515   NOTREACHED();
 516 }
 517
 518 void PanelView::PanelCopy() {
 519   // Nothing to do since we do not have panel-specific system menu.
 520   NOTREACHED();
 521 }
 522
 523 void PanelView::PanelPaste() {
 524   // Nothing to do since we do not have panel-specific system menu.
 525   NOTREACHED();
 526 }
 527
 528 void PanelView::DrawAttention(bool draw_attention) {
 529   DCHECK((panel_->attention_mode() & Panel::USE_PANEL_ATTENTION) != 0);
 530
 531   if (is_drawing_attention_ == draw_attention)
 532     return;
 533   is_drawing_attention_ = draw_attention;
 534   GetFrameView()->SchedulePaint();
 535
 536   if ((panel_->attention_mode() & Panel::USE_SYSTEM_ATTENTION) != 0) {
 537 #if defined(OS_WIN)
 538     // The default implementation of Widget::FlashFrame only flashes 5 times.
 539     // We need more than that.
 540     FLASHWINFO fwi;
 541     fwi.cbSize = sizeof(fwi);
 542     fwi.hwnd = views::HWNDForWidget(window_);
 543     if (draw_attention) {
 544       fwi.dwFlags = FLASHW_ALL;
 545       fwi.uCount = panel::kNumberOfTimesToFlashPanelForAttention;
 546       fwi.dwTimeout = 0;
 547     } else {
 548       // TODO(jianli): calling FlashWindowEx with FLASHW_STOP flag for the
 549       // panel window has the same problem as the stack window. However,
 550       // we cannot take the similar fix since there is no background window
 551       // to replace for the regular panel window. More investigation is needed.
 552       fwi.dwFlags = FLASHW_STOP;
 553     }
 554     ::FlashWindowEx(&fwi);
 555 #else
 556     window_->FlashFrame(draw_attention);
 557 #endif
 558   }
 559 }
 560
 561 bool PanelView::IsDrawingAttention() const {
 562   return is_drawing_attention_;
 563 }
 564
 565 void PanelView::HandlePanelKeyboardEvent(
 566     const content::NativeWebKeyboardEvent& event) {
 567   views::FocusManager* focus_manager = GetFocusManager();
 568   if (focus_manager->shortcut_handling_suspended())
 569     return;
 570
 571   ui::Accelerator accelerator(
 572       static_cast<ui::KeyboardCode>(event.windowsKeyCode),
 573       content::GetModifiersFromNativeWebKeyboardEvent(event));
 574   if (event.type == blink::WebInputEvent::KeyUp)
 575     accelerator.set_type(ui::ET_KEY_RELEASED);
 576   focus_manager->ProcessAccelerator(accelerator);
 577 }
 578
 579 void PanelView::FullScreenModeChanged(bool is_full_screen) {
 580   if (is_full_screen) {
 581     if (window_->IsVisible() && always_on_top_)
 582       window_->Hide();
 583   } else {
 584     if (!window_->IsVisible()) {
 585       ShowPanelInactive();
 586
 587 #if defined(OS_WIN)
 588       // When hiding and showing again a top-most window that belongs to a
 589       // background application (i.e. the application is not a foreground one),
 590       // the window may loose top-most placement even though its WS_EX_TOPMOST
 591       // bit is still set. Re-issuing SetWindowsPos() returns the window to its
 592       // top-most placement.
 593       if (always_on_top_)
 594         window_->SetAlwaysOnTop(true);
 595 #endif
 596     }
 597   }
 598 }
 599
 600 bool PanelView::IsPanelAlwaysOnTop() const {
 601   return always_on_top_;
 602 }
 603
 604 void PanelView::SetPanelAlwaysOnTop(bool on_top) {
 605   if (always_on_top_ == on_top)
 606     return;
 607   always_on_top_ = on_top;
 608
 609   window_->SetAlwaysOnTop(on_top);
 610   window_->non_client_view()->Layout();
 611   window_->client_view()->Layout();
 612 }
 613
 614 void PanelView::UpdatePanelMinimizeRestoreButtonVisibility() {
 615   GetFrameView()->UpdateTitlebarMinimizeRestoreButtonVisibility();
 616 }
 617
 618 void PanelView::SetWindowCornerStyle(panel::CornerStyle corner_style) {
 619   GetFrameView()->SetWindowCornerStyle(corner_style);
 620 }
 621
 622 void PanelView::PanelExpansionStateChanging(Panel::ExpansionState old_state,
 623                                             Panel::ExpansionState new_state) {
 624 #if defined(OS_WIN)
 625   // Live preview is only available since Windows 7.
 626   if (base::win::GetVersion() < base::win::VERSION_WIN7)
 627     return;
 628
 629   if (panel_->collection()->type() != PanelCollection::DOCKED)
 630     return;
 631
 632   bool is_minimized = old_state != Panel::EXPANDED;
 633   bool will_be_minimized = new_state != Panel::EXPANDED;
 634   if (is_minimized == will_be_minimized)
 635     return;
 636
 637   HWND native_window = views::HWNDForWidget(window_);
 638
 639   if (!thumbnailer_.get()) {
 640     DCHECK(native_window);
 641     thumbnailer_.reset(new TaskbarWindowThumbnailerWin(native_window, NULL));
 642   }
 643
 644   // Cache the image at this point.
 645   if (will_be_minimized) {
 646     // If the panel is still active (we will deactivate the minimizd panel at
 647     // later time), we need to paint it immediately as inactive so that we can
 648     // take a snapshot of inactive panel.
 649     if (focused_) {
 650       force_to_paint_as_inactive_ = true;
 651       ::RedrawWindow(native_window, NULL, NULL,
 652                      RDW_NOCHILDREN | RDW_INVALIDATE | RDW_UPDATENOW);
 653     }
 654
 655     // Start the thumbnailer and capture the snapshot now.
 656     thumbnailer_->Start();
 657     thumbnailer_->CaptureSnapshot();
 658   } else {
 659     force_to_paint_as_inactive_ = false;
 660     thumbnailer_->Stop();
 661   }
 662
 663 #endif
 664 }
 665
 666 gfx::Size PanelView::WindowSizeFromContentSize(
 667     const gfx::Size& content_size) const {
 668   gfx::Size frame = GetFrameView()->NonClientAreaSize();
 669   return gfx::Size(content_size.width() + frame.width(),
 670                    content_size.height() + frame.height());
 671 }
 672
 673 gfx::Size PanelView::ContentSizeFromWindowSize(
 674     const gfx::Size& window_size) const {
 675   gfx::Size frame = GetFrameView()->NonClientAreaSize();
 676   return gfx::Size(window_size.width() - frame.width(),
 677                    window_size.height() - frame.height());
 678 }
 679
 680 int PanelView::TitleOnlyHeight() const {
 681   return panel::kTitlebarHeight;
 682 }
 683
 684 void PanelView::MinimizePanelBySystem() {
 685   window_->Minimize();
 686 }
 687
 688 bool PanelView::IsPanelMinimizedBySystem() const {
 689   return window_->IsMinimized();
 690 }
 691
 692 bool PanelView::IsPanelShownOnActiveDesktop() const {
 693 #if defined(OS_WIN)
 694   // Virtual desktop is not supported by the native Windows system.
 695   return true;
 696 #else
 697   NOTIMPLEMENTED();
 698   return true;
 699 #endif
 700 }
 701
 702 void PanelView::ShowShadow(bool show) {
 703 #if defined(OS_WIN)
 704   // The overlapped window has the shadow while the popup window does not have
 705   // the shadow.
 706   int overlap_style = WS_OVERLAPPED | WS_THICKFRAME | WS_SYSMENU;
 707   int popup_style = WS_POPUP;
 708   UpdateWindowAttribute(GWL_STYLE,
 709                         show ? overlap_style : popup_style,
 710                         show ? popup_style : overlap_style,
 711                         true);
 712 #endif
 713 }
 714
 715 void PanelView::AttachWebContents(content::WebContents* contents) {
 716   web_view_->SetWebContents(contents);
 717 }
 718
 719 void PanelView::DetachWebContents(content::WebContents* contents) {
 720   web_view_->SetWebContents(NULL);
 721 }
 722
 723 NativePanelTesting* PanelView::CreateNativePanelTesting() {
 724   return new NativePanelTestingWin(this);
 725 }
 726
 727 void PanelView::OnDisplayChanged() {
 728   panel_->manager()->display_settings_provider()->OnDisplaySettingsChanged();
 729 }
 730
 731 void PanelView::OnWorkAreaChanged() {
 732   panel_->manager()->display_settings_provider()->OnDisplaySettingsChanged();
 733 }
 734
 735 bool PanelView::WillProcessWorkAreaChange() const {
 736   return true;
 737 }
 738
 739 views::View* PanelView::GetContentsView() {
 740   return this;
 741 }
 742
 743 views::NonClientFrameView* PanelView::CreateNonClientFrameView(
 744     views::Widget* widget) {
 745   PanelFrameView* frame_view = new PanelFrameView(this);
 746   frame_view->Init();
 747   return frame_view;
 748 }
 749
 750 bool PanelView::CanResize() const {
 751   return true;
 752 }
 753
 754 bool PanelView::CanMaximize() const {
 755   return false;
 756 }
 757
 758 base::string16 PanelView::GetWindowTitle() const {
 759   return panel_->GetWindowTitle();
 760 }
 761
 762 gfx::ImageSkia PanelView::GetWindowAppIcon() {
 763   gfx::Image app_icon = panel_->app_icon();
 764   if (app_icon.IsEmpty())
 765     return GetWindowIcon();
 766   else
 767     return *app_icon.ToImageSkia();
 768 }
 769
 770 gfx::ImageSkia PanelView::GetWindowIcon() {
 771   gfx::Image icon = panel_->GetCurrentPageIcon();
 772   return icon.IsEmpty() ? gfx::ImageSkia() : *icon.ToImageSkia();
 773 }
 774
 775 void PanelView::WindowClosing() {
 776   // When closing a panel via window.close, API or the close button,
 777   // ClosePanel() is called first, destroying the native |window_|
 778   // which results in this method being called. ClosePanel() sets
 779   // |window_closed_| to NULL.
 780   // If we still have a |window_closed_| here, the close was triggered by the
 781   // OS, (e.g. clicking on taskbar menu), which destroys the native |window_|
 782   // without invoking ClosePanel() beforehand.
 783   if (!window_closed_) {
 784     panel_->OnWindowClosing();
 785     ClosePanel();
 786     DCHECK(window_closed_);
 787   }
 788 }
 789
 790 void PanelView::DeleteDelegate() {
 791   delete this;
 792 }
 793
 794 void PanelView::OnWindowBeginUserBoundsChange() {
 795   user_resizing_ = true;
 796   panel_->OnPanelStartUserResizing();
 797
 798 #if defined(OS_WIN)
 799   StackedPanelCollection* stack = panel_->stack();
 800   if (stack) {
 801     // Listen to WM_SIZING message in order to find out whether the interior
 802     // edge is being resized such that the specific maximum size could be
 803     // passed to the system.
 804     if (panel_->stack()->GetPanelBelow(panel_.get())) {
 805       ui::HWNDSubclass::AddFilterToTarget(views::HWNDForWidget(window_), this);
 806       user_resizing_interior_stacked_panel_edge_ = false;
 807     }
 808
 809     // Keep track of the original full size of the resizing panel such that it
 810     // can be restored to this size once it is shrunk to minimized state.
 811     original_full_size_of_resizing_panel_ = panel_->full_size();
 812
 813     // Keep track of the original full size of the panel below the resizing
 814     // panel such that it can be restored to this size once it is shrunk to
 815     // minimized state.
 816     Panel* below_panel = stack->GetPanelBelow(panel_.get());
 817     if (below_panel && !below_panel->IsMinimized()) {
 818       original_full_size_of_panel_below_resizing_panel_ =
 819           below_panel->full_size();
 820     }
 821   }
 822 #endif
 823 }
 824
 825 void PanelView::OnWindowEndUserBoundsChange() {
 826   user_resizing_ = false;
 827   panel_->OnPanelEndUserResizing();
 828
 829   // No need to proceed with post-resizing update when there is no size change.
 830   gfx::Rect new_bounds = window_->GetWindowBoundsInScreen();
 831   if (bounds_ == new_bounds)
 832     return;
 833   bounds_ = new_bounds;
 834
 835   panel_->IncreaseMaxSize(bounds_.size());
 836   panel_->set_full_size(bounds_.size());
 837
 838 #if defined(OS_WIN)
 839   StackedPanelCollection* stack = panel_->stack();
 840   if (stack) {
 841     // No need to listen to WM_SIZING message any more.
 842     ui::HWNDSubclass::RemoveFilterFromAllTargets(this);
 843
 844     // If the height of resizing panel shrinks close to the titlebar height,
 845     // treate it as minimized. This could occur when the user is dragging
 846     // 1) the top edge of the top panel downward to shrink it; or
 847     // 2) the bottom edge of any panel upward to shrink it.
 848     if (panel_->GetBounds().height() <
 849             kStackedPanelHeightShrinkThresholdToBecomeMinimized) {
 850       stack->MinimizePanel(panel_.get());
 851       panel_->set_full_size(original_full_size_of_resizing_panel_);
 852     }
 853
 854     // If the height of panel below the resizing panel shrinks close to the
 855     // titlebar height, treat it as minimized. This could occur when the user
 856     // is dragging the bottom edge of non-bottom panel downward to expand it
 857     // and also shrink the panel below.
 858     Panel* below_panel = stack->GetPanelBelow(panel_.get());
 859     if (below_panel && !below_panel->IsMinimized() &&
 860         below_panel->GetBounds().height() <
 861             kStackedPanelHeightShrinkThresholdToBecomeMinimized) {
 862       stack->MinimizePanel(below_panel);
 863       below_panel->set_full_size(
 864           original_full_size_of_panel_below_resizing_panel_);
 865     }
 866   }
 867 #endif
 868
 869   panel_->collection()->RefreshLayout();
 870 }
 871
 872 views::Widget* PanelView::GetWidget() {
 873   return window_;
 874 }
 875
 876 const views::Widget* PanelView::GetWidget() const {
 877   return window_;
 878 }
 879
 880 void PanelView::UpdateLoadingAnimations(bool should_animate) {
 881   GetFrameView()->UpdateThrobber();
 882 }
 883
 884 void PanelView::UpdateWindowTitle() {
 885   window_->UpdateWindowTitle();
 886   GetFrameView()->UpdateTitle();
 887 }
 888
 889 void PanelView::UpdateWindowIcon() {
 890   window_->UpdateWindowIcon();
 891   GetFrameView()->UpdateIcon();
 892 }
 893
 894 void PanelView::Layout() {
 895   // |web_view_| might not be created yet when the window is first created.
 896   if (web_view_)
 897     web_view_->SetBounds(0, 0, width(), height());
 898 }
 899
 900 gfx::Size PanelView::GetMinimumSize() {
 901   // If the panel is minimized, it can be rendered to very small size, like
 902   // 4-pixel lines when it is docked. Otherwise, its size should not be less
 903   // than its minimum size.
 904   return panel_->IsMinimized() ? gfx::Size() :
 905       gfx::Size(panel::kPanelMinWidth, panel::kPanelMinHeight);
 906 }
 907
 908 gfx::Size PanelView::GetMaximumSize() {
 909   // If the user is resizing a stacked panel by its bottom edge, make sure its
 910   // height cannot grow more than what the panel below it could offer. This is
 911   // because growing a stacked panel by y amount will shrink the panel below it
 912   // by same amount and we do not want the panel below it being shrunk to be
 913   // smaller than the titlebar.
 914 #if defined(OS_WIN)
 915   if (panel_->stack() && user_resizing_interior_stacked_panel_edge_) {
 916     Panel* below_panel = panel_->stack()->GetPanelBelow(panel_.get());
 917     if (below_panel && !below_panel->IsMinimized()) {
 918       return gfx::Size(0, below_panel->GetBounds().bottom() -
 919           panel_->GetBounds().y() - panel::kTitlebarHeight);
 920     }
 921   }
 922 #endif
 923   return gfx::Size();
 924 }
 925
 926 bool PanelView::AcceleratorPressed(const ui::Accelerator& accelerator) {
 927   if (mouse_pressed_ && accelerator.key_code() == ui::VKEY_ESCAPE) {
 928     OnTitlebarMouseCaptureLost();
 929     return true;
 930   }
 931
 932   // No other accelerator is allowed when the drag begins.
 933   if (mouse_dragging_state_ == DRAGGING_STARTED)
 934     return true;
 935
 936   const std::map<ui::Accelerator, int>& accelerator_table =
 937       GetAcceleratorTable();
 938   std::map<ui::Accelerator, int>::const_iterator iter =
 939       accelerator_table.find(accelerator);
 940   DCHECK(iter != accelerator_table.end());
 941   return panel_->ExecuteCommandIfEnabled(iter->second);
 942 }
 943
 944 void PanelView::OnWidgetDestroying(views::Widget* widget) {
 945   window_ = NULL;
 946 }
 947
 948 void PanelView::OnWidgetActivationChanged(views::Widget* widget, bool active) {
 949 #if defined(OS_WIN)
 950   // WM_NCACTIVATED could be sent when an active window is being destroyed on
 951   // Windows. We need to guard against this.
 952   if (window_closed_)
 953     return;
 954
 955   bool focused = active;
 956   if (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_NATIVE) {
 957     // The panel window is in focus (actually accepting keystrokes) if it is
 958     // active and belongs to a foreground application.
 959     focused = active &&
 960         views::HWNDForWidget(widget) == ::GetForegroundWindow();
 961   }
 962 #else
 963   NOTIMPLEMENTED();
 964   bool focused = active;
 965 #endif
 966
 967   if (focused_ == focused)
 968     return;
 969   focused_ = focused;
 970
 971   // Expand the panel if the minimized panel is activated by means other than
 972   // clicking on its titlebar. This is the workaround to support restoring the
 973   // minimized panel by other means, like alt-tabbing, win-tabbing, or clicking
 974   // the taskbar icon. Note that this workaround does not work for one edge
 975   // case: the mouse happens to be at the minimized panel when the user tries to
 976   // bring up the panel with the above alternatives.
 977   // When the user clicks on the minimized panel, the panel expansion will be
 978   // done when we process the mouse button pressed message.
 979 #if defined(OS_WIN)
 980   if (focused_ && panel_->IsMinimized() &&
 981       panel_->collection()->type() == PanelCollection::DOCKED &&
 982       gfx::Screen::GetScreenFor(widget->GetNativeWindow())->
 983           GetWindowUnderCursor() != widget->GetNativeWindow()) {
 984     panel_->Restore();
 985   }
 986 #endif
 987
 988   panel()->OnActiveStateChanged(focused);
 989
 990    // Give web contents view a chance to set focus to the appropriate element.
 991   if (focused_) {
 992     content::WebContents* web_contents = panel_->GetWebContents();
 993     if (web_contents)
 994       web_contents->GetView()->RestoreFocus();
 995   }
 996 }
 997
 998 void PanelView::OnWidgetBoundsChanged(views::Widget* widget,
 999                                       const gfx::Rect& new_bounds) {
1000   if (user_resizing_)
1001     panel()->collection()->OnPanelResizedByMouse(panel(), new_bounds);
1002 }
1003
1004 bool PanelView::OnTitlebarMousePressed(const gfx::Point& mouse_location) {
1005   mouse_pressed_ = true;
1006   mouse_dragging_state_ = NO_DRAGGING;
1007   last_mouse_location_ = mouse_location;
1008   return true;
1009 }
1010
1011 bool PanelView::OnTitlebarMouseDragged(const gfx::Point& mouse_location) {
1012   if (!mouse_pressed_)
1013     return false;
1014
1015   if (mouse_dragging_state_ == NO_DRAGGING &&
1016       ExceededDragThreshold(mouse_location - last_mouse_location_)) {
1017     // When a drag begins, we do not want to the client area to still receive
1018     // the focus. We do not need to do this for the unfocused minimized panel.
1019     if (!panel_->IsMinimized()) {
1020       old_focused_view_ = GetFocusManager()->GetFocusedView();
1021       GetFocusManager()->SetFocusedView(GetFrameView());
1022     }
1023
1024     panel_->manager()->StartDragging(panel_.get(), last_mouse_location_);
1025     mouse_dragging_state_ = DRAGGING_STARTED;
1026   }
1027   if (mouse_dragging_state_ == DRAGGING_STARTED) {
1028     panel_->manager()->Drag(mouse_location);
1029
1030     // Once in drag, update |last_mouse_location_| on each drag fragment, since
1031     // we already dragged the panel up to the current mouse location.
1032     last_mouse_location_ = mouse_location;
1033   }
1034   return true;
1035 }
1036
1037 bool PanelView::OnTitlebarMouseReleased(panel::ClickModifier modifier) {
1038   if (mouse_dragging_state_ != NO_DRAGGING) {
1039     // Ensure dragging a minimized panel does not leave it activated.
1040     // Windows activates a panel on mouse-down, regardless of our attempts
1041     // to prevent activation of a minimized panel. Now that we know mouse-down
1042     // resulted in a mouse-drag, we need to ensure the minimized panel is
1043     // deactivated.
1044     if (panel_->IsMinimized() && focused_)
1045       panel_->Deactivate();
1046
1047     if (mouse_dragging_state_ == DRAGGING_STARTED) {
1048       // When a drag ends, restore the focus.
1049       if (old_focused_view_) {
1050         GetFocusManager()->SetFocusedView(old_focused_view_);
1051         old_focused_view_ = NULL;
1052       }
1053       return EndDragging(false);
1054     }
1055
1056     // The panel drag was cancelled before the mouse is released. Do not
1057     // treat this as a click.
1058     return true;
1059   }
1060
1061   panel_->OnTitlebarClicked(modifier);
1062   return true;
1063 }
1064
1065 bool PanelView::OnTitlebarMouseCaptureLost() {
1066   if (mouse_dragging_state_ == DRAGGING_STARTED)
1067     return EndDragging(true);
1068   return true;
1069 }
1070
1071 bool PanelView::EndDragging(bool cancelled) {
1072   // Only handle clicks that started in our window.
1073   if (!mouse_pressed_)
1074     return false;
1075   mouse_pressed_ = false;
1076
1077   mouse_dragging_state_ = DRAGGING_ENDED;
1078   panel_->manager()->EndDragging(cancelled);
1079   return true;
1080 }
1081
1082 PanelFrameView* PanelView::GetFrameView() const {
1083   return static_cast<PanelFrameView*>(window_->non_client_view()->frame_view());
1084 }
1085
1086 bool PanelView::IsAnimatingBounds() const {
1087   if (bounds_animator_.get() && bounds_animator_->is_animating())
1088     return true;
1089   StackedPanelCollection* stack = panel_->stack();
1090   if (!stack)
1091     return false;
1092   return stack->IsAnimatingPanelBounds(panel_.get());
1093 }
1094
1095 bool PanelView::IsWithinResizingArea(const gfx::Point& mouse_location) const {
1096   gfx::Rect bounds = window_->GetWindowBoundsInScreen();
1097   DCHECK(bounds.Contains(mouse_location));
1098   return mouse_location.x() < bounds.x() + kResizeInsideBoundsSize ||
1099          mouse_location.x() >= bounds.right() - kResizeInsideBoundsSize ||
1100          mouse_location.y() < bounds.y() + kResizeInsideBoundsSize ||
1101          mouse_location.y() >= bounds.bottom() - kResizeInsideBoundsSize;
1102 }
1103
1104 #if defined(OS_WIN)
1105 void PanelView::UpdateWindowAttribute(int attribute_index,
1106                                       int attribute_value_to_set,
1107                                       int attribute_value_to_reset,
1108                                       bool update_frame) {
1109   HWND native_window = views::HWNDForWidget(window_);
1110   int value = ::GetWindowLong(native_window, attribute_index);
1111   int expected_value = value;
1112   if (attribute_value_to_set)
1113     expected_value |=  attribute_value_to_set;
1114   if (attribute_value_to_reset)
1115     expected_value &=  ~attribute_value_to_reset;
1116   if (value != expected_value)
1117     ::SetWindowLong(native_window, attribute_index, expected_value);
1118
1119   // Per MSDN, if any of the frame styles is changed, SetWindowPos with the
1120   // SWP_FRAMECHANGED flag must be called in order for the cached window data
1121   // to be updated properly.
1122   // http://msdn.microsoft.com/en-us/library/windows/desktop/ms633591(v=vs.85).aspx
1123   if (update_frame) {
1124     ::SetWindowPos(native_window, NULL, 0, 0, 0, 0,
1125                    SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE |
1126                        SWP_NOZORDER | SWP_NOACTIVATE);
1127   }
1128 }
1129 #endif