chrome/browser/ui/views/tabs/tab.h

   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 #ifndef CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_
   6 #define CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_
   7
   8 #include <list>
   9 #include <string>
  10
  11 #include "base/memory/ref_counted.h"
  12 #include "base/memory/scoped_ptr.h"
  13 #include "chrome/browser/ui/views/tabs/tab_renderer_data.h"
  14 #include "ui/base/layout.h"
  15 #include "ui/gfx/animation/animation_delegate.h"
  16 #include "ui/gfx/point.h"
  17 #include "ui/views/context_menu_controller.h"
  18 #include "ui/views/controls/button/button.h"
  19 #include "ui/views/controls/glow_hover_controller.h"
  20 #include "ui/views/view.h"
  21
  22 class TabController;
  23
  24 namespace gfx {
  25 class Animation;
  26 class AnimationContainer;
  27 class Font;
  28 class LinearAnimation;
  29 class MultiAnimation;
  30 }
  31 namespace views {
  32 class ImageButton;
  33 }
  34
  35 ///////////////////////////////////////////////////////////////////////////////
  36 //
  37 //  A View that renders a Tab in a TabStrip.
  38 //
  39 ///////////////////////////////////////////////////////////////////////////////
  40 class Tab : public gfx::AnimationDelegate,
  41             public views::ButtonListener,
  42             public views::ContextMenuController,
  43             public views::View {
  44  public:
  45   // The menu button's class name.
  46   static const char kViewClassName[];
  47
  48   explicit Tab(TabController* controller);
  49   virtual ~Tab();
  50
  51   // Used to set/check whether this Tab is being animated closed.
  52   void set_closing(bool closing) { closing_ = closing; }
  53   bool closing() const { return closing_; }
  54
  55   // See description above field.
  56   void set_dragging(bool dragging) { dragging_ = dragging; }
  57   bool dragging() const { return dragging_; }
  58
  59   // Sets the container all animations run from.
  60   void set_animation_container(gfx::AnimationContainer* container);
  61
  62   // Returns true if this tab is the active tab.
  63   bool IsActive() const;
  64
  65   // Returns true if the tab is selected.
  66   bool IsSelected() const;
  67
  68   // Sets the data this tabs displays. Invokes DataChanged.
  69   void SetData(const TabRendererData& data);
  70   const TabRendererData& data() const { return data_; }
  71
  72   // Sets the network state. If the network state changes NetworkStateChanged is
  73   // invoked.
  74   void UpdateLoadingAnimation(TabRendererData::NetworkState state);
  75
  76   // Starts/Stops a pulse animation.
  77   void StartPulse();
  78   void StopPulse();
  79
  80   // Start/stop the mini-tab title animation.
  81   void StartMiniTabTitleAnimation();
  82   void StopMiniTabTitleAnimation();
  83
  84   // Set the background offset used to match the image in the inactive tab
  85   // to the frame image.
  86   void set_background_offset(const gfx::Point& offset) {
  87     background_offset_ = offset;
  88   }
  89
  90   // Returns true if this tab became the active tab selected in
  91   // response to the last ui::ET_GESTURE_BEGIN gesture dispatched to
  92   // this tab. Only used for collecting UMA metrics.
  93   // See ash/touch/touch_uma.cc.
  94   bool tab_activated_with_last_gesture_begin() const {
  95     return tab_activated_with_last_gesture_begin_;
  96   }
  97
  98   views::GlowHoverController* hover_controller() {
  99     return &hover_controller_;
 100   }
 101
 102   // Returns the minimum possible size of a single unselected Tab.
 103   static gfx::Size GetMinimumUnselectedSize();
 104   // Returns the minimum possible size of a selected Tab. Selected tabs must
 105   // always show a close button and have a larger minimum size than unselected
 106   // tabs.
 107   static gfx::Size GetMinimumSelectedSize();
 108   // Returns the preferred size of a single Tab, assuming space is
 109   // available.
 110   static gfx::Size GetStandardSize();
 111
 112   // Returns the width for touch tabs.
 113   static int GetTouchWidth();
 114
 115   // Returns the width for mini-tabs. Mini-tabs always have this width.
 116   static int GetMiniWidth();
 117
 118   // Returns the height for immersive mode tabs.
 119   static int GetImmersiveHeight();
 120
 121  private:
 122   friend class TabTest;
 123   FRIEND_TEST_ALL_PREFIXES(TabTest, CloseButtonLayout);
 124
 125   friend class TabStripTest;
 126   FRIEND_TEST_ALL_PREFIXES(TabStripTest, TabHitTestMaskWhenStacked);
 127   FRIEND_TEST_ALL_PREFIXES(TabStripTest, ClippedTabCloseButton);
 128
 129   // The animation object used to swap the favicon with the sad tab icon.
 130   class FaviconCrashAnimation;
 131   class TabCloseButton;
 132
 133   // Contains a cached image and the values used to generate it.
 134   struct ImageCacheEntry {
 135     ImageCacheEntry();
 136     ~ImageCacheEntry();
 137
 138     // ID of the resource used.
 139     int resource_id;
 140
 141     // Scale factor we're drawing it.
 142     ui::ScaleFactor scale_factor;
 143
 144     // The image.
 145     gfx::ImageSkia image;
 146   };
 147
 148   typedef std::list<ImageCacheEntry> ImageCache;
 149
 150   // Overridden from gfx::AnimationDelegate:
 151   virtual void AnimationProgressed(const gfx::Animation* animation) OVERRIDE;
 152   virtual void AnimationCanceled(const gfx::Animation* animation) OVERRIDE;
 153   virtual void AnimationEnded(const gfx::Animation* animation) OVERRIDE;
 154
 155   // Overridden from views::ButtonListener:
 156   virtual void ButtonPressed(views::Button* sender,
 157                              const ui::Event& event) OVERRIDE;
 158
 159   // Overridden from views::ContextMenuController:
 160   virtual void ShowContextMenuForView(views::View* source,
 161                                       const gfx::Point& point,
 162                                       ui::MenuSourceType source_type) OVERRIDE;
 163
 164   // Overridden from views::View:
 165   virtual void OnPaint(gfx::Canvas* canvas) OVERRIDE;
 166   virtual void Layout() OVERRIDE;
 167   virtual void OnThemeChanged() OVERRIDE;
 168   virtual const char* GetClassName() const OVERRIDE;
 169   virtual bool HasHitTestMask() const OVERRIDE;
 170   virtual void GetHitTestMask(HitTestSource source,
 171                               gfx::Path* path) const OVERRIDE;
 172   virtual bool GetTooltipText(const gfx::Point& p,
 173                               base::string16* tooltip) const OVERRIDE;
 174   virtual bool GetTooltipTextOrigin(const gfx::Point& p,
 175                                     gfx::Point* origin) const OVERRIDE;
 176   virtual bool OnMousePressed(const ui::MouseEvent& event) OVERRIDE;
 177   virtual bool OnMouseDragged(const ui::MouseEvent& event) OVERRIDE;
 178   virtual void OnMouseReleased(const ui::MouseEvent& event) OVERRIDE;
 179   virtual void OnMouseCaptureLost() OVERRIDE;
 180   virtual void OnMouseEntered(const ui::MouseEvent& event) OVERRIDE;
 181   virtual void OnMouseMoved(const ui::MouseEvent& event) OVERRIDE;
 182   virtual void OnMouseExited(const ui::MouseEvent& event) OVERRIDE;
 183   virtual void GetAccessibleState(ui::AXViewState* state) OVERRIDE;
 184
 185   // Overridden from ui::EventHandler:
 186   virtual void OnGestureEvent(ui::GestureEvent* event) OVERRIDE;
 187
 188   // Returns the bounds of the title and icon.
 189   const gfx::Rect& GetTitleBounds() const;
 190   const gfx::Rect& GetIconBounds() const;
 191
 192   // Invoked from Layout to adjust the position of the favicon or media
 193   // indicator for mini tabs.
 194   void MaybeAdjustLeftForMiniTab(gfx::Rect* bounds) const;
 195
 196   // Invoked from SetData after |data_| has been updated to the new data.
 197   void DataChanged(const TabRendererData& old);
 198
 199   // Paint with the normal tab style.
 200   void PaintTab(gfx::Canvas* canvas);
 201
 202   // Paint with the "immersive mode" light-bar style.
 203   void PaintImmersiveTab(gfx::Canvas* canvas);
 204
 205   // Paint various portions of the Tab
 206   void PaintTabBackground(gfx::Canvas* canvas);
 207   void PaintInactiveTabBackgroundWithTitleChange(
 208       gfx::Canvas* canvas,
 209       gfx::MultiAnimation* animation);
 210   void PaintInactiveTabBackground(gfx::Canvas* canvas);
 211   void PaintInactiveTabBackgroundUsingResourceId(gfx::Canvas* canvas,
 212                                                  int tab_id);
 213   void PaintActiveTabBackground(gfx::Canvas* canvas);
 214
 215   // Paints the favicon, media indicator icon, etc., mirrored for RTL if needed.
 216   void PaintIcon(gfx::Canvas* canvas);
 217   void PaintMediaIndicator(gfx::Canvas* canvas);
 218   void PaintTitle(gfx::Canvas* canvas, SkColor title_color);
 219
 220   // Invoked if data_.network_state changes, or the network_state is not none.
 221   void AdvanceLoadingAnimation(TabRendererData::NetworkState old_state,
 222                                TabRendererData::NetworkState state);
 223
 224   // Returns the number of favicon-size elements that can fit in the tab's
 225   // current size.
 226   int IconCapacity() const;
 227
 228   // Returns whether the Tab should display a favicon.
 229   bool ShouldShowIcon() const;
 230
 231   // Returns whether the Tab should display the media indicator.
 232   bool ShouldShowMediaIndicator() const;
 233
 234   // Returns whether the Tab should display a close button.
 235   bool ShouldShowCloseBox() const;
 236
 237   // Gets the throb value for the tab. When a tab is not selected the
 238   // active background is drawn at |GetThrobValue()|%. This is used for hover,
 239   // mini tab title change and pulsing.
 240   double GetThrobValue();
 241
 242   // Set the temporary offset for the favicon. This is used during the crash
 243   // animation.
 244   void SetFaviconHidingOffset(int offset);
 245
 246   void DisplayCrashedFavicon();
 247   void ResetCrashedFavicon();
 248
 249   void StopCrashAnimation();
 250   void StartCrashAnimation();
 251
 252   // Returns true if the crash animation is currently running.
 253   bool IsPerformingCrashAnimation() const;
 254
 255   // Starts the media indicator fade-in/out animation. There's no stop method
 256   // because this is not a continuous animation.
 257   void StartMediaIndicatorAnimation();
 258
 259   // Schedules repaint task for icon.
 260   void ScheduleIconPaint();
 261
 262   // Returns the rectangle for the light bar in immersive mode.
 263   gfx::Rect GetImmersiveBarRect() const;
 264
 265   // Gets the tab id and frame id.
 266   void GetTabIdAndFrameId(views::Widget* widget,
 267                           int* tab_id,
 268                           int* frame_id) const;
 269
 270   // Performs a one-time initialization of static resources such as tab images.
 271   static void InitTabResources();
 272
 273   // Returns the minimum possible size of a single unselected Tab, not
 274   // including considering touch mode.
 275   static gfx::Size GetBasicMinimumUnselectedSize();
 276
 277   // Loads the images to be used for the tab background.
 278   static void LoadTabImages();
 279
 280   // Returns the cached image for the specified arguments, or an empty image if
 281   // there isn't one cached.
 282   static gfx::ImageSkia GetCachedImage(int resource_id,
 283                                        const gfx::Size& size,
 284                                        ui::ScaleFactor scale_factor);
 285
 286   // Caches the specified image.
 287   static void SetCachedImage(int resource_id,
 288                              ui::ScaleFactor scale_factor,
 289                              const gfx::ImageSkia& image);
 290
 291   // The controller, never NULL.
 292   TabController* controller_;
 293
 294   TabRendererData data_;
 295
 296   // True if the tab is being animated closed.
 297   bool closing_;
 298
 299   // True if the tab is being dragged.
 300   bool dragging_;
 301
 302   // The offset used to animate the favicon location. This is used when the tab
 303   // crashes.
 304   int favicon_hiding_offset_;
 305
 306   // The current index of the loading animation. The range varies depending on
 307   // whether the tab is loading or waiting, see AdvanceLoadingAnimation().
 308   int loading_animation_frame_;
 309
 310   // Step in the immersive loading progress indicator.
 311   int immersive_loading_step_;
 312
 313   bool should_display_crashed_favicon_;
 314
 315   // Whole-tab throbbing "pulse" animation.
 316   scoped_ptr<gfx::Animation> tab_animation_;
 317
 318   // Crash icon animation (in place of favicon).
 319   scoped_ptr<gfx::LinearAnimation> crash_icon_animation_;
 320
 321   // Media indicator fade-in/out animation (i.e., only on show/hide, not a
 322   // continuous animation).
 323   scoped_ptr<gfx::Animation> media_indicator_animation_;
 324   TabMediaState animating_media_state_;
 325
 326   scoped_refptr<gfx::AnimationContainer> animation_container_;
 327
 328   views::ImageButton* close_button_;
 329
 330   bool tab_activated_with_last_gesture_begin_;
 331
 332   views::GlowHoverController hover_controller_;
 333
 334   // The bounds of various sections of the display.
 335   gfx::Rect favicon_bounds_;
 336   gfx::Rect title_bounds_;
 337   gfx::Rect media_indicator_bounds_;
 338
 339   // The offset used to paint the inactive background image.
 340   gfx::Point background_offset_;
 341
 342   struct TabImage {
 343     gfx::ImageSkia* image_l;
 344     gfx::ImageSkia* image_c;
 345     gfx::ImageSkia* image_r;
 346     int l_width;
 347     int r_width;
 348   };
 349   static TabImage tab_active_;
 350   static TabImage tab_inactive_;
 351   static TabImage tab_alpha_;
 352
 353   // Whether we're showing the icon. It is cached so that we can detect when it
 354   // changes and layout appropriately.
 355   bool showing_icon_;
 356
 357   // Whether we're showing the media indicator. It is cached so that we can
 358   // detect when it changes and layout appropriately.
 359   bool showing_media_indicator_;
 360
 361   // Whether we are showing the close button. It is cached so that we can
 362   // detect when it changes and layout appropriately.
 363   bool showing_close_button_;
 364
 365   // The current color of the close button.
 366   SkColor close_button_color_;
 367
 368   static gfx::Font* font_;
 369   static int font_height_;
 370
 371   // As the majority of the tabs are inactive, and painting tabs is slowish,
 372   // we cache a handful of the inactive tab backgrounds here.
 373   static ImageCache* image_cache_;
 374
 375   DISALLOW_COPY_AND_ASSIGN(Tab);
 376 };
 377
 378 #endif  // CHROME_BROWSER_UI_VIEWS_TABS_TAB_H_