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/auto_keep_alive.h"
  19 #include "chrome/browser/ui/views/panels/panel_frame_view.h"
  20 #include "content/public/browser/render_view_host.h"
  21 #include "content/public/browser/render_widget_host_view.h"
  22 #include "content/public/browser/web_contents.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.visible_on_all_workspaces = always_on_top;
 280   params.bounds = bounds;
 281   window_->Init(params);
 282   window_->set_frame_type(views::Widget::FRAME_TYPE_FORCE_CUSTOM);
 283   window_->set_focus_on_creation(false);
 284   window_->AddObserver(this);
 285
 286   // Prevent the browser process from shutting down while this window is open.
 287   keep_alive_.reset(new AutoKeepAlive(GetNativePanelWindow()));
 288
 289   web_view_ = new views::WebView(NULL);
 290   AddChildView(web_view_);
 291
 292   // Register accelarators supported by panels.
 293   views::FocusManager* focus_manager = GetFocusManager();
 294   const std::map<ui::Accelerator, int>& accelerator_table =
 295       GetAcceleratorTable();
 296   for (std::map<ui::Accelerator, int>::const_iterator iter =
 297            accelerator_table.begin();
 298        iter != accelerator_table.end(); ++iter) {
 299     focus_manager->RegisterAccelerator(
 300         iter->first, ui::AcceleratorManager::kNormalPriority, this);
 301   }
 302
 303 #if defined(OS_WIN)
 304   ui::win::SetAppIdForWindow(
 305       ShellIntegration::GetAppModelIdForProfile(
 306           base::UTF8ToWide(panel->app_name()), panel->profile()->GetPath()),
 307       views::HWNDForWidget(window_));
 308   ui::win::PreventWindowFromPinning(views::HWNDForWidget(window_));
 309 #endif
 310 }
 311
 312 PanelView::~PanelView() {
 313 }
 314
 315 void PanelView::ShowPanel() {
 316   ShowPanelInactive();
 317   ActivatePanel();
 318 }
 319
 320 void PanelView::ShowPanelInactive() {
 321   if (window_->IsVisible())
 322     return;
 323   window_->ShowInactive();
 324   // No animation is used for initial creation of a panel on Win.
 325   // Signal immediately that pending actions can be performed.
 326   panel_->manager()->OnPanelAnimationEnded(panel_.get());
 327 }
 328
 329 gfx::Rect PanelView::GetPanelBounds() const {
 330   return bounds_;
 331 }
 332
 333 void PanelView::SetPanelBounds(const gfx::Rect& bounds) {
 334   SetBoundsInternal(bounds, true);
 335 }
 336
 337 void PanelView::SetPanelBoundsInstantly(const gfx::Rect& bounds) {
 338   SetBoundsInternal(bounds, false);
 339 }
 340
 341 void PanelView::SetBoundsInternal(const gfx::Rect& new_bounds, bool animate) {
 342   if (bounds_ == new_bounds)
 343     return;
 344
 345   bounds_ = new_bounds;
 346
 347   if (!animate) {
 348     // If no animation is in progress, apply bounds change instantly. Otherwise,
 349     // continue the animation with new target bounds.
 350     if (!IsAnimatingBounds())
 351       SetWidgetBounds(bounds_);
 352     return;
 353   }
 354
 355   animation_start_bounds_ = window_->GetWindowBoundsInScreen();
 356
 357   bounds_animator_.reset(new PanelBoundsAnimation(
 358       this, panel_.get(), animation_start_bounds_, new_bounds));
 359   bounds_animator_->Start();
 360 }
 361
 362 #if defined(OS_WIN)
 363 bool PanelView::FilterMessage(HWND hwnd,
 364                               UINT message,
 365                               WPARAM w_param,
 366                               LPARAM l_param,
 367                               LRESULT* l_result) {
 368   switch (message) {
 369     case WM_SIZING:
 370       if (w_param == WMSZ_BOTTOM)
 371         user_resizing_interior_stacked_panel_edge_ = true;
 372       break;
 373   }
 374   return false;
 375 }
 376 #endif
 377
 378 void PanelView::AnimationEnded(const gfx::Animation* animation) {
 379   panel_->manager()->OnPanelAnimationEnded(panel_.get());
 380 }
 381
 382 void PanelView::AnimationProgressed(const gfx::Animation* animation) {
 383   gfx::Rect new_bounds = bounds_animator_->CurrentValueBetween(
 384       animation_start_bounds_, bounds_);
 385   SetWidgetBounds(new_bounds);
 386 }
 387
 388 void PanelView::SetWidgetBounds(const gfx::Rect& new_bounds) {
 389 #if defined(OS_WIN)
 390   // An overlapped window is a top-level window that has a titlebar, border,
 391   // and client area. The Windows system will automatically put the shadow
 392   // around the whole window. Also the system will enforce the minimum height
 393   // (38 pixels based on observation) for the overlapped window such that it
 394   // will always has the space for the titlebar.
 395   //
 396   // On contrast, a popup window is a bare minimum window without border and
 397   // titlebar by default. It is often used for the popup menu and the window
 398   // with short life. The Windows system does not add the shadow around the
 399   // whole window though CS_DROPSHADOW class style could be passed to add the
 400   // drop shadow which is only around the right and bottom edges.
 401   //
 402   // The height of the title-only or minimized panel is smaller than the minimum
 403   // overlapped window height. If the panel still uses the overlapped window
 404   // style, Windows system will automatically increase the window height. To
 405   // work around this limitation, we temporarily change the window style to
 406   // popup when the height to set is smaller than the minimum overlapped window
 407   // height and then restore the window style to overlapped when the height
 408   // grows.
 409   static const int kMinimumOverlappedWindowHeight = 38;
 410   gfx::Rect old_bounds = GetWidget()->GetRestoredBounds();
 411   if (old_bounds.height() > kMinimumOverlappedWindowHeight &&
 412       new_bounds.height() <= kMinimumOverlappedWindowHeight) {
 413     // When the panel height shrinks below the minimum overlapped window height,
 414     // change the window style to popup such that we can show the title-only
 415     // and minimized panel without additional height being added by the system.
 416     UpdateWindowAttribute(GWL_STYLE,
 417                           WS_POPUP,
 418                           WS_OVERLAPPED | WS_THICKFRAME | WS_SYSMENU,
 419                           true);
 420   } else if (old_bounds.height() <= kMinimumOverlappedWindowHeight &&
 421              new_bounds.height() > kMinimumOverlappedWindowHeight) {
 422     // Change the window style back to overlappped when the panel height grow
 423     // taller than the minimum overlapped window height.
 424     UpdateWindowAttribute(GWL_STYLE,
 425                           WS_OVERLAPPED | WS_THICKFRAME | WS_SYSMENU,
 426                           WS_POPUP,
 427                           true);
 428   }
 429 #endif
 430
 431   GetWidget()->SetBounds(new_bounds);
 432 }
 433
 434 void PanelView::ClosePanel() {
 435   // We're already closing. Do nothing.
 436   if (window_closed_)
 437     return;
 438
 439   if (!panel_->ShouldCloseWindow())
 440     return;
 441
 442   // Cancel any currently running animation since we're closing down.
 443   if (bounds_animator_.get())
 444     bounds_animator_.reset();
 445
 446   if (panel_->GetWebContents()) {
 447     // Still have web contents. Allow renderer to shut down.
 448     // When web contents are destroyed, we will be called back again.
 449     panel_->OnWindowClosing();
 450     return;
 451   }
 452
 453   panel_->OnNativePanelClosed();
 454   if (window_)
 455     window_->Close();
 456   window_closed_ = true;
 457 }
 458
 459 void PanelView::ActivatePanel() {
 460   window_->Activate();
 461 }
 462
 463 void PanelView::DeactivatePanel() {
 464   if (!focused_)
 465     return;
 466
 467 #if defined(OS_WIN)
 468   // Need custom behavior for always-on-top panels to avoid
 469   // the OS activating a minimized panel when this one is
 470   // deactivated.
 471   if (always_on_top_) {
 472     ::SetForegroundWindow(::GetDesktopWindow());
 473     return;
 474   }
 475 #endif
 476
 477   window_->Deactivate();
 478 }
 479
 480 bool PanelView::IsPanelActive() const {
 481   return focused_;
 482 }
 483
 484 void PanelView::PreventActivationByOS(bool prevent_activation) {
 485 #if defined(OS_WIN)
 486   // Set the flags "NoActivate" to make sure the minimized panels do not get
 487   // activated by the OS. In addition, set "AppWindow" to make sure the
 488   // minimized panels do appear in the taskbar and Alt-Tab menu if it is not
 489   // in a stack.
 490   int value_to_change = WS_EX_NOACTIVATE;
 491   if (!panel_->stack())
 492     value_to_change |= WS_EX_APPWINDOW;
 493   if (prevent_activation)
 494     UpdateWindowAttribute(GWL_EXSTYLE, value_to_change, 0, false);
 495   else
 496     UpdateWindowAttribute(GWL_EXSTYLE, 0, value_to_change, false);
 497 #endif
 498 }
 499
 500 gfx::NativeWindow PanelView::GetNativePanelWindow() {
 501   return window_->GetNativeWindow();
 502 }
 503
 504 void PanelView::UpdatePanelTitleBar() {
 505   UpdateWindowTitle();
 506   UpdateWindowIcon();
 507 }
 508
 509 void PanelView::UpdatePanelLoadingAnimations(bool should_animate) {
 510   GetFrameView()->UpdateThrobber();
 511 }
 512
 513 void PanelView::PanelWebContentsFocused(content::WebContents* contents) {
 514   web_view_->OnWebContentsFocused(contents);
 515 }
 516
 517 void PanelView::PanelCut() {
 518   // Nothing to do since we do not have panel-specific system menu.
 519   NOTREACHED();
 520 }
 521
 522 void PanelView::PanelCopy() {
 523   // Nothing to do since we do not have panel-specific system menu.
 524   NOTREACHED();
 525 }
 526
 527 void PanelView::PanelPaste() {
 528   // Nothing to do since we do not have panel-specific system menu.
 529   NOTREACHED();
 530 }
 531
 532 void PanelView::DrawAttention(bool draw_attention) {
 533   DCHECK((panel_->attention_mode() & Panel::USE_PANEL_ATTENTION) != 0);
 534
 535   if (is_drawing_attention_ == draw_attention)
 536     return;
 537   is_drawing_attention_ = draw_attention;
 538   GetFrameView()->SchedulePaint();
 539
 540   if ((panel_->attention_mode() & Panel::USE_SYSTEM_ATTENTION) != 0) {
 541 #if defined(OS_WIN)
 542     // The default implementation of Widget::FlashFrame only flashes 5 times.
 543     // We need more than that.
 544     FLASHWINFO fwi;
 545     fwi.cbSize = sizeof(fwi);
 546     fwi.hwnd = views::HWNDForWidget(window_);
 547     if (draw_attention) {
 548       fwi.dwFlags = FLASHW_ALL;
 549       fwi.uCount = panel::kNumberOfTimesToFlashPanelForAttention;
 550       fwi.dwTimeout = 0;
 551     } else {
 552       // TODO(jianli): calling FlashWindowEx with FLASHW_STOP flag for the
 553       // panel window has the same problem as the stack window. However,
 554       // we cannot take the similar fix since there is no background window
 555       // to replace for the regular panel window. More investigation is needed.
 556       fwi.dwFlags = FLASHW_STOP;
 557     }
 558     ::FlashWindowEx(&fwi);
 559 #else
 560     window_->FlashFrame(draw_attention);
 561 #endif
 562   }
 563 }
 564
 565 bool PanelView::IsDrawingAttention() const {
 566   return is_drawing_attention_;
 567 }
 568
 569 void PanelView::HandlePanelKeyboardEvent(
 570     const content::NativeWebKeyboardEvent& event) {
 571   views::FocusManager* focus_manager = GetFocusManager();
 572   if (focus_manager->shortcut_handling_suspended())
 573     return;
 574
 575   ui::Accelerator accelerator(
 576       static_cast<ui::KeyboardCode>(event.windowsKeyCode),
 577       content::GetModifiersFromNativeWebKeyboardEvent(event));
 578   if (event.type == blink::WebInputEvent::KeyUp)
 579     accelerator.set_type(ui::ET_KEY_RELEASED);
 580   focus_manager->ProcessAccelerator(accelerator);
 581 }
 582
 583 void PanelView::FullScreenModeChanged(bool is_full_screen) {
 584   if (is_full_screen) {
 585     if (window_->IsVisible() && always_on_top_)
 586       window_->Hide();
 587   } else {
 588     if (!window_->IsVisible()) {
 589       ShowPanelInactive();
 590
 591 #if defined(OS_WIN)
 592       // When hiding and showing again a top-most window that belongs to a
 593       // background application (i.e. the application is not a foreground one),
 594       // the window may loose top-most placement even though its WS_EX_TOPMOST
 595       // bit is still set. Re-issuing SetWindowsPos() returns the window to its
 596       // top-most placement.
 597       if (always_on_top_)
 598         window_->SetAlwaysOnTop(true);
 599 #endif
 600     }
 601   }
 602 }
 603
 604 bool PanelView::IsPanelAlwaysOnTop() const {
 605   return always_on_top_;
 606 }
 607
 608 void PanelView::SetPanelAlwaysOnTop(bool on_top) {
 609   if (always_on_top_ == on_top)
 610     return;
 611   always_on_top_ = on_top;
 612
 613   window_->SetAlwaysOnTop(on_top);
 614   window_->SetVisibleOnAllWorkspaces(on_top);
 615   window_->non_client_view()->Layout();
 616   window_->client_view()->Layout();
 617 }
 618
 619 void PanelView::UpdatePanelMinimizeRestoreButtonVisibility() {
 620   GetFrameView()->UpdateTitlebarMinimizeRestoreButtonVisibility();
 621 }
 622
 623 void PanelView::SetWindowCornerStyle(panel::CornerStyle corner_style) {
 624   GetFrameView()->SetWindowCornerStyle(corner_style);
 625 }
 626
 627 void PanelView::PanelExpansionStateChanging(Panel::ExpansionState old_state,
 628                                             Panel::ExpansionState new_state) {
 629 #if defined(OS_WIN)
 630   // Live preview is only available since Windows 7.
 631   if (base::win::GetVersion() < base::win::VERSION_WIN7)
 632     return;
 633
 634   if (panel_->collection()->type() != PanelCollection::DOCKED)
 635     return;
 636
 637   bool is_minimized = old_state != Panel::EXPANDED;
 638   bool will_be_minimized = new_state != Panel::EXPANDED;
 639   if (is_minimized == will_be_minimized)
 640     return;
 641
 642   HWND native_window = views::HWNDForWidget(window_);
 643
 644   if (!thumbnailer_.get()) {
 645     DCHECK(native_window);
 646     thumbnailer_.reset(new TaskbarWindowThumbnailerWin(native_window, NULL));
 647   }
 648
 649   // Cache the image at this point.
 650   if (will_be_minimized) {
 651     // If the panel is still active (we will deactivate the minimizd panel at
 652     // later time), we need to paint it immediately as inactive so that we can
 653     // take a snapshot of inactive panel.
 654     if (focused_) {
 655       force_to_paint_as_inactive_ = true;
 656       ::RedrawWindow(native_window, NULL, NULL,
 657                      RDW_NOCHILDREN | RDW_INVALIDATE | RDW_UPDATENOW);
 658     }
 659
 660     // Start the thumbnailer and capture the snapshot now.
 661     thumbnailer_->Start();
 662     thumbnailer_->CaptureSnapshot();
 663   } else {
 664     force_to_paint_as_inactive_ = false;
 665     thumbnailer_->Stop();
 666   }
 667
 668 #endif
 669 }
 670
 671 gfx::Size PanelView::WindowSizeFromContentSize(
 672     const gfx::Size& content_size) const {
 673   gfx::Size frame = GetFrameView()->NonClientAreaSize();
 674   return gfx::Size(content_size.width() + frame.width(),
 675                    content_size.height() + frame.height());
 676 }
 677
 678 gfx::Size PanelView::ContentSizeFromWindowSize(
 679     const gfx::Size& window_size) const {
 680   gfx::Size frame = GetFrameView()->NonClientAreaSize();
 681   return gfx::Size(window_size.width() - frame.width(),
 682                    window_size.height() - frame.height());
 683 }
 684
 685 int PanelView::TitleOnlyHeight() const {
 686   return panel::kTitlebarHeight;
 687 }
 688
 689 void PanelView::MinimizePanelBySystem() {
 690   window_->Minimize();
 691 }
 692
 693 bool PanelView::IsPanelMinimizedBySystem() const {
 694   return window_->IsMinimized();
 695 }
 696
 697 bool PanelView::IsPanelShownOnActiveDesktop() const {
 698 #if defined(OS_WIN)
 699   // Virtual desktop is not supported by the native Windows system.
 700   return true;
 701 #else
 702   NOTIMPLEMENTED();
 703   return true;
 704 #endif
 705 }
 706
 707 void PanelView::ShowShadow(bool show) {
 708 #if defined(OS_WIN)
 709   // The overlapped window has the shadow while the popup window does not have
 710   // the shadow.
 711   int overlap_style = WS_OVERLAPPED | WS_THICKFRAME | WS_SYSMENU;
 712   int popup_style = WS_POPUP;
 713   UpdateWindowAttribute(GWL_STYLE,
 714                         show ? overlap_style : popup_style,
 715                         show ? popup_style : overlap_style,
 716                         true);
 717 #endif
 718 }
 719
 720 void PanelView::AttachWebContents(content::WebContents* contents) {
 721   web_view_->SetWebContents(contents);
 722 }
 723
 724 void PanelView::DetachWebContents(content::WebContents* contents) {
 725   web_view_->SetWebContents(NULL);
 726 }
 727
 728 NativePanelTesting* PanelView::CreateNativePanelTesting() {
 729   return new NativePanelTestingWin(this);
 730 }
 731
 732 void PanelView::OnDisplayChanged() {
 733   panel_->manager()->display_settings_provider()->OnDisplaySettingsChanged();
 734 }
 735
 736 void PanelView::OnWorkAreaChanged() {
 737   panel_->manager()->display_settings_provider()->OnDisplaySettingsChanged();
 738 }
 739
 740 bool PanelView::WillProcessWorkAreaChange() const {
 741   return true;
 742 }
 743
 744 views::View* PanelView::GetContentsView() {
 745   return this;
 746 }
 747
 748 views::NonClientFrameView* PanelView::CreateNonClientFrameView(
 749     views::Widget* widget) {
 750   PanelFrameView* frame_view = new PanelFrameView(this);
 751   frame_view->Init();
 752   return frame_view;
 753 }
 754
 755 bool PanelView::CanResize() const {
 756   return true;
 757 }
 758
 759 bool PanelView::CanMaximize() const {
 760   return false;
 761 }
 762
 763 base::string16 PanelView::GetWindowTitle() const {
 764   return panel_->GetWindowTitle();
 765 }
 766
 767 gfx::ImageSkia PanelView::GetWindowAppIcon() {
 768   gfx::Image app_icon = panel_->app_icon();
 769   if (app_icon.IsEmpty())
 770     return GetWindowIcon();
 771   else
 772     return *app_icon.ToImageSkia();
 773 }
 774
 775 gfx::ImageSkia PanelView::GetWindowIcon() {
 776   gfx::Image icon = panel_->GetCurrentPageIcon();
 777   return icon.IsEmpty() ? gfx::ImageSkia() : *icon.ToImageSkia();
 778 }
 779
 780 void PanelView::WindowClosing() {
 781   // When closing a panel via window.close, API or the close button,
 782   // ClosePanel() is called first, destroying the native |window_|
 783   // which results in this method being called. ClosePanel() sets
 784   // |window_closed_| to NULL.
 785   // If we still have a |window_closed_| here, the close was triggered by the
 786   // OS, (e.g. clicking on taskbar menu), which destroys the native |window_|
 787   // without invoking ClosePanel() beforehand.
 788   if (!window_closed_) {
 789     panel_->OnWindowClosing();
 790     ClosePanel();
 791     DCHECK(window_closed_);
 792   }
 793 }
 794
 795 void PanelView::DeleteDelegate() {
 796   delete this;
 797 }
 798
 799 void PanelView::OnWindowBeginUserBoundsChange() {
 800   user_resizing_ = true;
 801   panel_->OnPanelStartUserResizing();
 802
 803 #if defined(OS_WIN)
 804   StackedPanelCollection* stack = panel_->stack();
 805   if (stack) {
 806     // Listen to WM_SIZING message in order to find out whether the interior
 807     // edge is being resized such that the specific maximum size could be
 808     // passed to the system.
 809     if (panel_->stack()->GetPanelBelow(panel_.get())) {
 810       ui::HWNDSubclass::AddFilterToTarget(views::HWNDForWidget(window_), this);
 811       user_resizing_interior_stacked_panel_edge_ = false;
 812     }
 813
 814     // Keep track of the original full size of the resizing panel such that it
 815     // can be restored to this size once it is shrunk to minimized state.
 816     original_full_size_of_resizing_panel_ = panel_->full_size();
 817
 818     // Keep track of the original full size of the panel below the resizing
 819     // panel such that it can be restored to this size once it is shrunk to
 820     // minimized state.
 821     Panel* below_panel = stack->GetPanelBelow(panel_.get());
 822     if (below_panel && !below_panel->IsMinimized()) {
 823       original_full_size_of_panel_below_resizing_panel_ =
 824           below_panel->full_size();
 825     }
 826   }
 827 #endif
 828 }
 829
 830 void PanelView::OnWindowEndUserBoundsChange() {
 831   user_resizing_ = false;
 832   panel_->OnPanelEndUserResizing();
 833
 834   // No need to proceed with post-resizing update when there is no size change.
 835   gfx::Rect new_bounds = window_->GetWindowBoundsInScreen();
 836   if (bounds_ == new_bounds)
 837     return;
 838   bounds_ = new_bounds;
 839
 840   panel_->IncreaseMaxSize(bounds_.size());
 841   panel_->set_full_size(bounds_.size());
 842
 843 #if defined(OS_WIN)
 844   StackedPanelCollection* stack = panel_->stack();
 845   if (stack) {
 846     // No need to listen to WM_SIZING message any more.
 847     ui::HWNDSubclass::RemoveFilterFromAllTargets(this);
 848
 849     // If the height of resizing panel shrinks close to the titlebar height,
 850     // treate it as minimized. This could occur when the user is dragging
 851     // 1) the top edge of the top panel downward to shrink it; or
 852     // 2) the bottom edge of any panel upward to shrink it.
 853     if (panel_->GetBounds().height() <
 854             kStackedPanelHeightShrinkThresholdToBecomeMinimized) {
 855       stack->MinimizePanel(panel_.get());
 856       panel_->set_full_size(original_full_size_of_resizing_panel_);
 857     }
 858
 859     // If the height of panel below the resizing panel shrinks close to the
 860     // titlebar height, treat it as minimized. This could occur when the user
 861     // is dragging the bottom edge of non-bottom panel downward to expand it
 862     // and also shrink the panel below.
 863     Panel* below_panel = stack->GetPanelBelow(panel_.get());
 864     if (below_panel && !below_panel->IsMinimized() &&
 865         below_panel->GetBounds().height() <
 866             kStackedPanelHeightShrinkThresholdToBecomeMinimized) {
 867       stack->MinimizePanel(below_panel);
 868       below_panel->set_full_size(
 869           original_full_size_of_panel_below_resizing_panel_);
 870     }
 871   }
 872 #endif
 873
 874   panel_->collection()->RefreshLayout();
 875 }
 876
 877 views::Widget* PanelView::GetWidget() {
 878   return window_;
 879 }
 880
 881 const views::Widget* PanelView::GetWidget() const {
 882   return window_;
 883 }
 884
 885 void PanelView::UpdateLoadingAnimations(bool should_animate) {
 886   GetFrameView()->UpdateThrobber();
 887 }
 888
 889 void PanelView::UpdateWindowTitle() {
 890   window_->UpdateWindowTitle();
 891   GetFrameView()->UpdateTitle();
 892 }
 893
 894 void PanelView::UpdateWindowIcon() {
 895   window_->UpdateWindowIcon();
 896   GetFrameView()->UpdateIcon();
 897 }
 898
 899 void PanelView::Layout() {
 900   // |web_view_| might not be created yet when the window is first created.
 901   if (web_view_)
 902     web_view_->SetBounds(0, 0, width(), height());
 903 }
 904
 905 gfx::Size PanelView::GetMinimumSize() const {
 906   // If the panel is minimized, it can be rendered to very small size, like
 907   // 4-pixel lines when it is docked. Otherwise, its size should not be less
 908   // than its minimum size.
 909   return panel_->IsMinimized() ? gfx::Size() :
 910       gfx::Size(panel::kPanelMinWidth, panel::kPanelMinHeight);
 911 }
 912
 913 gfx::Size PanelView::GetMaximumSize() {
 914   // If the user is resizing a stacked panel by its bottom edge, make sure its
 915   // height cannot grow more than what the panel below it could offer. This is
 916   // because growing a stacked panel by y amount will shrink the panel below it
 917   // by same amount and we do not want the panel below it being shrunk to be
 918   // smaller than the titlebar.
 919 #if defined(OS_WIN)
 920   if (panel_->stack() && user_resizing_interior_stacked_panel_edge_) {
 921     Panel* below_panel = panel_->stack()->GetPanelBelow(panel_.get());
 922     if (below_panel && !below_panel->IsMinimized()) {
 923       return gfx::Size(0, below_panel->GetBounds().bottom() -
 924           panel_->GetBounds().y() - panel::kTitlebarHeight);
 925     }
 926   }
 927 #endif
 928   return gfx::Size();
 929 }
 930
 931 bool PanelView::AcceleratorPressed(const ui::Accelerator& accelerator) {
 932   if (mouse_pressed_ && accelerator.key_code() == ui::VKEY_ESCAPE) {
 933     OnTitlebarMouseCaptureLost();
 934     return true;
 935   }
 936
 937   // No other accelerator is allowed when the drag begins.
 938   if (mouse_dragging_state_ == DRAGGING_STARTED)
 939     return true;
 940
 941   const std::map<ui::Accelerator, int>& accelerator_table =
 942       GetAcceleratorTable();
 943   std::map<ui::Accelerator, int>::const_iterator iter =
 944       accelerator_table.find(accelerator);
 945   DCHECK(iter != accelerator_table.end());
 946   return panel_->ExecuteCommandIfEnabled(iter->second);
 947 }
 948
 949 void PanelView::OnWidgetDestroying(views::Widget* widget) {
 950   window_ = NULL;
 951 }
 952
 953 void PanelView::OnWidgetActivationChanged(views::Widget* widget, bool active) {
 954 #if defined(OS_WIN)
 955   // WM_NCACTIVATED could be sent when an active window is being destroyed on
 956   // Windows. We need to guard against this.
 957   if (window_closed_)
 958     return;
 959
 960   bool focused = active;
 961   if (chrome::GetActiveDesktop() == chrome::HOST_DESKTOP_TYPE_NATIVE) {
 962     // The panel window is in focus (actually accepting keystrokes) if it is
 963     // active and belongs to a foreground application.
 964     focused = active &&
 965         views::HWNDForWidget(widget) == ::GetForegroundWindow();
 966   }
 967 #else
 968   NOTIMPLEMENTED();
 969   bool focused = active;
 970 #endif
 971
 972   if (focused_ == focused)
 973     return;
 974   focused_ = focused;
 975
 976   // Expand the panel if the minimized panel is activated by means other than
 977   // clicking on its titlebar. This is the workaround to support restoring the
 978   // minimized panel by other means, like alt-tabbing, win-tabbing, or clicking
 979   // the taskbar icon. Note that this workaround does not work for one edge
 980   // case: the mouse happens to be at the minimized panel when the user tries to
 981   // bring up the panel with the above alternatives.
 982   // When the user clicks on the minimized panel, the panel expansion will be
 983   // done when we process the mouse button pressed message.
 984 #if defined(OS_WIN)
 985   if (focused_ && panel_->IsMinimized() &&
 986       panel_->collection()->type() == PanelCollection::DOCKED &&
 987       gfx::Screen::GetScreenFor(widget->GetNativeWindow())->
 988           GetWindowUnderCursor() != widget->GetNativeWindow()) {
 989     panel_->Restore();
 990   }
 991 #endif
 992
 993   panel()->OnActiveStateChanged(focused);
 994
 995    // Give web contents view a chance to set focus to the appropriate element.
 996   if (focused_) {
 997     content::WebContents* web_contents = panel_->GetWebContents();
 998     if (web_contents)
 999       web_contents->RestoreFocus();
1000   }
1001 }
1002
1003 void PanelView::OnWidgetBoundsChanged(views::Widget* widget,
1004                                       const gfx::Rect& new_bounds) {
1005   if (user_resizing_)
1006     panel()->collection()->OnPanelResizedByMouse(panel(), new_bounds);
1007 }
1008
1009 bool PanelView::OnTitlebarMousePressed(const gfx::Point& mouse_location) {
1010   mouse_pressed_ = true;
1011   mouse_dragging_state_ = NO_DRAGGING;
1012   last_mouse_location_ = mouse_location;
1013   return true;
1014 }
1015
1016 bool PanelView::OnTitlebarMouseDragged(const gfx::Point& mouse_location) {
1017   if (!mouse_pressed_)
1018     return false;
1019
1020   if (mouse_dragging_state_ == NO_DRAGGING &&
1021       ExceededDragThreshold(mouse_location - last_mouse_location_)) {
1022     // When a drag begins, we do not want to the client area to still receive
1023     // the focus. We do not need to do this for the unfocused minimized panel.
1024     if (!panel_->IsMinimized()) {
1025       old_focused_view_ = GetFocusManager()->GetFocusedView();
1026       GetFocusManager()->SetFocusedView(GetFrameView());
1027     }
1028
1029     panel_->manager()->StartDragging(panel_.get(), last_mouse_location_);
1030     mouse_dragging_state_ = DRAGGING_STARTED;
1031   }
1032   if (mouse_dragging_state_ == DRAGGING_STARTED) {
1033     panel_->manager()->Drag(mouse_location);
1034
1035     // Once in drag, update |last_mouse_location_| on each drag fragment, since
1036     // we already dragged the panel up to the current mouse location.
1037     last_mouse_location_ = mouse_location;
1038   }
1039   return true;
1040 }
1041
1042 bool PanelView::OnTitlebarMouseReleased(panel::ClickModifier modifier) {
1043   if (mouse_dragging_state_ != NO_DRAGGING) {
1044     // Ensure dragging a minimized panel does not leave it activated.
1045     // Windows activates a panel on mouse-down, regardless of our attempts
1046     // to prevent activation of a minimized panel. Now that we know mouse-down
1047     // resulted in a mouse-drag, we need to ensure the minimized panel is
1048     // deactivated.
1049     if (panel_->IsMinimized() && focused_)
1050       panel_->Deactivate();
1051
1052     if (mouse_dragging_state_ == DRAGGING_STARTED) {
1053       // When a drag ends, restore the focus.
1054       if (old_focused_view_) {
1055         GetFocusManager()->SetFocusedView(old_focused_view_);
1056         old_focused_view_ = NULL;
1057       }
1058       return EndDragging(false);
1059     }
1060
1061     // The panel drag was cancelled before the mouse is released. Do not
1062     // treat this as a click.
1063     return true;
1064   }
1065
1066   panel_->OnTitlebarClicked(modifier);
1067   return true;
1068 }
1069
1070 bool PanelView::OnTitlebarMouseCaptureLost() {
1071   if (mouse_dragging_state_ == DRAGGING_STARTED)
1072     return EndDragging(true);
1073   return true;
1074 }
1075
1076 bool PanelView::EndDragging(bool cancelled) {
1077   // Only handle clicks that started in our window.
1078   if (!mouse_pressed_)
1079     return false;
1080   mouse_pressed_ = false;
1081
1082   mouse_dragging_state_ = DRAGGING_ENDED;
1083   panel_->manager()->EndDragging(cancelled);
1084   return true;
1085 }
1086
1087 PanelFrameView* PanelView::GetFrameView() const {
1088   return static_cast<PanelFrameView*>(window_->non_client_view()->frame_view());
1089 }
1090
1091 bool PanelView::IsAnimatingBounds() const {
1092   if (bounds_animator_.get() && bounds_animator_->is_animating())
1093     return true;
1094   StackedPanelCollection* stack = panel_->stack();
1095   if (!stack)
1096     return false;
1097   return stack->IsAnimatingPanelBounds(panel_.get());
1098 }
1099
1100 bool PanelView::IsWithinResizingArea(const gfx::Point& mouse_location) const {
1101   gfx::Rect bounds = window_->GetWindowBoundsInScreen();
1102   DCHECK(bounds.Contains(mouse_location));
1103   return mouse_location.x() < bounds.x() + kResizeInsideBoundsSize ||
1104          mouse_location.x() >= bounds.right() - kResizeInsideBoundsSize ||
1105          mouse_location.y() < bounds.y() + kResizeInsideBoundsSize ||
1106          mouse_location.y() >= bounds.bottom() - kResizeInsideBoundsSize;
1107 }
1108
1109 #if defined(OS_WIN)
1110 void PanelView::UpdateWindowAttribute(int attribute_index,
1111                                       int attribute_value_to_set,
1112                                       int attribute_value_to_reset,
1113                                       bool update_frame) {
1114   HWND native_window = views::HWNDForWidget(window_);
1115   int value = ::GetWindowLong(native_window, attribute_index);
1116   int expected_value = value;
1117   if (attribute_value_to_set)
1118     expected_value |=  attribute_value_to_set;
1119   if (attribute_value_to_reset)
1120     expected_value &=  ~attribute_value_to_reset;
1121   if (value != expected_value)
1122     ::SetWindowLong(native_window, attribute_index, expected_value);
1123
1124   // Per MSDN, if any of the frame styles is changed, SetWindowPos with the
1125   // SWP_FRAMECHANGED flag must be called in order for the cached window data
1126   // to be updated properly.
1127   // http://msdn.microsoft.com/en-us/library/windows/desktop/ms633591(v=vs.85).aspx
1128   if (update_frame) {
1129     ::SetWindowPos(native_window, NULL, 0, 0, 0, 0,
1130                    SWP_FRAMECHANGED | SWP_NOMOVE | SWP_NOSIZE |
1131                        SWP_NOZORDER | SWP_NOACTIVATE);
1132   }
1133 }
1134 #endif