chrome/browser/ui/views/tabs/tab.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/tabs/tab.h"
   6
   7 #include <limits>
   8
   9 #include "base/command_line.h"
  10 #include "base/debug/alias.h"
  11 #include "base/profiler/scoped_tracker.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "chrome/browser/themes/theme_properties.h"
  14 #include "chrome/browser/ui/browser.h"
  15 #include "chrome/browser/ui/tab_contents/core_tab_helper.h"
  16 #include "chrome/browser/ui/tabs/tab_resources.h"
  17 #include "chrome/browser/ui/tabs/tab_utils.h"
  18 #include "chrome/browser/ui/view_ids.h"
  19 #include "chrome/browser/ui/views/tabs/media_indicator_button.h"
  20 #include "chrome/browser/ui/views/tabs/tab_controller.h"
  21 #include "chrome/browser/ui/views/theme_image_mapper.h"
  22 #include "chrome/browser/ui/views/touch_uma/touch_uma.h"
  23 #include "chrome/common/chrome_switches.h"
  24 #include "chrome/grit/generated_resources.h"
  25 #include "content/public/browser/user_metrics.h"
  26 #include "grit/theme_resources.h"
  27 #include "third_party/skia/include/effects/SkGradientShader.h"
  28 #include "ui/accessibility/ax_view_state.h"
  29 #include "ui/base/l10n/l10n_util.h"
  30 #include "ui/base/models/list_selection_model.h"
  31 #include "ui/base/resource/resource_bundle.h"
  32 #include "ui/base/theme_provider.h"
  33 #include "ui/gfx/animation/animation_container.h"
  34 #include "ui/gfx/animation/multi_animation.h"
  35 #include "ui/gfx/animation/throb_animation.h"
  36 #include "ui/gfx/canvas.h"
  37 #include "ui/gfx/color_analysis.h"
  38 #include "ui/gfx/favicon_size.h"
  39 #include "ui/gfx/geometry/rect_conversions.h"
  40 #include "ui/gfx/image/image_skia_operations.h"
  41 #include "ui/gfx/path.h"
  42 #include "ui/gfx/skia_util.h"
  43 #include "ui/resources/grit/ui_resources.h"
  44 #include "ui/views/border.h"
  45 #include "ui/views/controls/button/image_button.h"
  46 #include "ui/views/controls/label.h"
  47 #include "ui/views/rect_based_targeting_utils.h"
  48 #include "ui/views/view_targeter.h"
  49 #include "ui/views/widget/tooltip_manager.h"
  50 #include "ui/views/widget/widget.h"
  51 #include "ui/views/window/non_client_view.h"
  52
  53 #if defined(USE_AURA)
  54 #include "ui/aura/env.h"
  55 #endif
  56
  57 using base::UserMetricsAction;
  58
  59 namespace {
  60
  61 // Padding around the "content" of a tab, occupied by the tab border graphics.
  62 const int kLeftPadding = 22;
  63 const int kTopPadding = 4;
  64 const int kRightPadding = 17;
  65 const int kBottomPadding = 2;
  66
  67 // Height of the shadow at the top of the tab image assets.
  68 const int kDropShadowHeight = 4;
  69
  70 // How long the pulse throb takes.
  71 const int kPulseDurationMs = 200;
  72
  73 // Width of touch tabs.
  74 static const int kTouchWidth = 120;
  75
  76 static const int kToolbarOverlap = 1;
  77 static const int kFaviconTitleSpacing = 4;
  78 static const int kViewSpacing = 3;
  79 static const int kStandardTitleWidth = 175;
  80
  81 // Width of mini-tabs.
  82 const int kMiniTabWidth = 64;
  83
  84 // When a non-mini-tab becomes a mini-tab the width of the tab animates. If
  85 // the width of a mini-tab is >= kMiniTabRendererAsNormalTabWidth then the tab
  86 // is rendered as a normal tab. This is done to avoid having the title
  87 // immediately disappear when transitioning a tab from normal to mini-tab.
  88 static const int kMiniTabRendererAsNormalTabWidth = kMiniTabWidth + 30;
  89
  90 // How opaque to make the hover state (out of 1).
  91 static const double kHoverOpacity = 0.33;
  92
  93 // Opacity for non-active selected tabs.
  94 static const double kSelectedTabOpacity = .45;
  95
  96 // Selected (but not active) tabs have their throb value scaled down by this.
  97 static const double kSelectedTabThrobScale = .5;
  98
  99 // Durations for the various parts of the mini tab title animation.
 100 static const int kMiniTitleChangeAnimationDuration1MS = 1600;
 101 static const int kMiniTitleChangeAnimationStart1MS = 0;
 102 static const int kMiniTitleChangeAnimationEnd1MS = 1900;
 103 static const int kMiniTitleChangeAnimationDuration2MS = 0;
 104 static const int kMiniTitleChangeAnimationDuration3MS = 550;
 105 static const int kMiniTitleChangeAnimationStart3MS = 150;
 106 static const int kMiniTitleChangeAnimationEnd3MS = 800;
 107 static const int kMiniTitleChangeAnimationIntervalMS = 40;
 108
 109 // Offset from the right edge for the start of the mini title change animation.
 110 static const int kMiniTitleChangeInitialXOffset = 6;
 111
 112 // Radius of the radial gradient used for mini title change animation.
 113 static const int kMiniTitleChangeGradientRadius = 20;
 114
 115 // Colors of the gradient used during the mini title change animation.
 116 static const SkColor kMiniTitleChangeGradientColor1 = SK_ColorWHITE;
 117 static const SkColor kMiniTitleChangeGradientColor2 =
 118     SkColorSetARGB(0, 255, 255, 255);
 119
 120 // Max number of images to cache. This has to be at least two since rounding
 121 // errors may lead to tabs in the same tabstrip having different sizes.
 122 const size_t kMaxImageCacheSize = 4;
 123
 124 // Height of the miniature tab strip in immersive mode.
 125 const int kImmersiveTabHeight = 3;
 126
 127 // Height of the small tab indicator rectangles in immersive mode.
 128 const int kImmersiveBarHeight = 2;
 129
 130 // Color for active and inactive tabs in the immersive mode light strip. These
 131 // should be a little brighter than the color of the normal art assets for tabs,
 132 // which for active tabs is 230, 230, 230 and for inactive is 184, 184, 184.
 133 const SkColor kImmersiveActiveTabColor = SkColorSetRGB(235, 235, 235);
 134 const SkColor kImmersiveInactiveTabColor = SkColorSetRGB(190, 190, 190);
 135
 136 // The minimum opacity (out of 1) when a tab (either active or inactive) is
 137 // throbbing in the immersive mode light strip.
 138 const double kImmersiveTabMinThrobOpacity = 0.66;
 139
 140 // Number of steps in the immersive mode loading animation.
 141 const int kImmersiveLoadingStepCount = 32;
 142
 143 const char kTabCloseButtonName[] = "TabCloseButton";
 144
 145 void DrawIconAtLocation(gfx::Canvas* canvas,
 146                         const gfx::ImageSkia& image,
 147                         int image_offset,
 148                         int dst_x,
 149                         int dst_y,
 150                         int icon_width,
 151                         int icon_height,
 152                         bool filter,
 153                         const SkPaint& paint) {
 154   // NOTE: the clipping is a work around for 69528, it shouldn't be necessary.
 155   canvas->Save();
 156   canvas->ClipRect(gfx::Rect(dst_x, dst_y, icon_width, icon_height));
 157   canvas->DrawImageInt(image,
 158                        image_offset, 0, icon_width, icon_height,
 159                        dst_x, dst_y, icon_width, icon_height,
 160                        filter, paint);
 161   canvas->Restore();
 162 }
 163
 164 // Draws the icon image at the center of |bounds|.
 165 void DrawIconCenter(gfx::Canvas* canvas,
 166                     const gfx::ImageSkia& image,
 167                     int image_offset,
 168                     int icon_width,
 169                     int icon_height,
 170                     const gfx::Rect& bounds,
 171                     bool filter,
 172                     const SkPaint& paint) {
 173   // Center the image within bounds.
 174   int dst_x = bounds.x() - (icon_width - bounds.width()) / 2;
 175   int dst_y = bounds.y() - (icon_height - bounds.height()) / 2;
 176   DrawIconAtLocation(canvas, image, image_offset, dst_x, dst_y, icon_width,
 177                      icon_height, filter, paint);
 178 }
 179
 180 chrome::HostDesktopType GetHostDesktopType(views::View* view) {
 181   // Widget is NULL when tabs are detached.
 182   views::Widget* widget = view->GetWidget();
 183   return chrome::GetHostDesktopTypeForNativeView(
 184       widget ? widget->GetNativeView() : NULL);
 185 }
 186
 187 // Stop()s |animation| and then deletes it. We do this rather than just deleting
 188 // so that the delegate is notified before the destruction.
 189 void StopAndDeleteAnimation(scoped_ptr<gfx::Animation> animation) {
 190   if (animation)
 191     animation->Stop();
 192 }
 193
 194 }  // namespace
 195
 196 ////////////////////////////////////////////////////////////////////////////////
 197 // FaviconCrashAnimation
 198 //
 199 //  A custom animation subclass to manage the favicon crash animation.
 200 class Tab::FaviconCrashAnimation : public gfx::LinearAnimation,
 201                                    public gfx::AnimationDelegate {
 202  public:
 203   explicit FaviconCrashAnimation(Tab* target)
 204       : gfx::LinearAnimation(1000, 25, this),
 205         target_(target) {
 206   }
 207   ~FaviconCrashAnimation() override {}
 208
 209   // gfx::Animation overrides:
 210   void AnimateToState(double state) override {
 211     const double kHidingOffset = 27;
 212
 213     if (state < .5) {
 214       target_->SetFaviconHidingOffset(
 215           static_cast<int>(floor(kHidingOffset * 2.0 * state)));
 216     } else {
 217       target_->DisplayCrashedFavicon();
 218       target_->SetFaviconHidingOffset(
 219           static_cast<int>(
 220               floor(kHidingOffset - ((state - .5) * 2.0 * kHidingOffset))));
 221     }
 222   }
 223
 224   // gfx::AnimationDelegate overrides:
 225   void AnimationCanceled(const gfx::Animation* animation) override {
 226     target_->SetFaviconHidingOffset(0);
 227   }
 228
 229  private:
 230   Tab* target_;
 231
 232   DISALLOW_COPY_AND_ASSIGN(FaviconCrashAnimation);
 233 };
 234
 235 ////////////////////////////////////////////////////////////////////////////////
 236 // TabCloseButton
 237 //
 238 //  This is a Button subclass that causes middle clicks to be forwarded to the
 239 //  parent View by explicitly not handling them in OnMousePressed.
 240 class Tab::TabCloseButton : public views::ImageButton,
 241                             public views::MaskedTargeterDelegate {
 242  public:
 243   explicit TabCloseButton(Tab* tab)
 244       : views::ImageButton(tab),
 245         tab_(tab) {
 246     SetEventTargeter(
 247         scoped_ptr<views::ViewTargeter>(new views::ViewTargeter(this)));
 248   }
 249
 250   ~TabCloseButton() override {}
 251
 252   // views::View:
 253   View* GetTooltipHandlerForPoint(const gfx::Point& point) override {
 254     // Tab close button has no children, so tooltip handler should be the same
 255     // as the event handler.
 256     // In addition, a hit test has to be performed for the point (as
 257     // GetTooltipHandlerForPoint() is responsible for it).
 258     if (!HitTestPoint(point))
 259       return NULL;
 260     return GetEventHandlerForPoint(point);
 261   }
 262
 263   bool OnMousePressed(const ui::MouseEvent& event) override {
 264     tab_->controller_->OnMouseEventInTab(this, event);
 265
 266     bool handled = ImageButton::OnMousePressed(event);
 267     // Explicitly mark midle-mouse clicks as non-handled to ensure the tab
 268     // sees them.
 269     return event.IsOnlyMiddleMouseButton() ? false : handled;
 270   }
 271
 272   void OnMouseMoved(const ui::MouseEvent& event) override {
 273     tab_->controller_->OnMouseEventInTab(this, event);
 274     CustomButton::OnMouseMoved(event);
 275   }
 276
 277   void OnMouseReleased(const ui::MouseEvent& event) override {
 278     tab_->controller_->OnMouseEventInTab(this, event);
 279     CustomButton::OnMouseReleased(event);
 280   }
 281
 282   void OnGestureEvent(ui::GestureEvent* event) override {
 283     // Consume all gesture events here so that the parent (Tab) does not
 284     // start consuming gestures.
 285     ImageButton::OnGestureEvent(event);
 286     event->SetHandled();
 287   }
 288
 289   const char* GetClassName() const override { return kTabCloseButtonName; }
 290
 291  private:
 292   // Returns the rectangular bounds of parent tab's visible region in the
 293   // local coordinate space of |this|.
 294   gfx::Rect GetTabBounds() const {
 295     gfx::Path tab_mask;
 296     tab_->GetHitTestMask(&tab_mask);
 297
 298     gfx::RectF tab_bounds_f(gfx::SkRectToRectF(tab_mask.getBounds()));
 299     views::View::ConvertRectToTarget(tab_, this, &tab_bounds_f);
 300     return gfx::ToEnclosingRect(tab_bounds_f);
 301   }
 302
 303   // Returns the rectangular bounds of the tab close button in the local
 304   // coordinate space of |this|, not including clipped regions on the top
 305   // or bottom of the button. |tab_bounds| is the rectangular bounds of
 306   // the parent tab's visible region in the local coordinate space of |this|.
 307   gfx::Rect GetTabCloseButtonBounds(const gfx::Rect& tab_bounds) const {
 308     gfx::Rect button_bounds(GetContentsBounds());
 309     button_bounds.set_x(GetMirroredXForRect(button_bounds));
 310
 311     int top_overflow = tab_bounds.y() - button_bounds.y();
 312     int bottom_overflow = button_bounds.bottom() - tab_bounds.bottom();
 313     if (top_overflow > 0)
 314       button_bounds.set_y(tab_bounds.y());
 315     else if (bottom_overflow > 0)
 316       button_bounds.set_height(button_bounds.height() - bottom_overflow);
 317
 318     return button_bounds;
 319   }
 320
 321   // views::ViewTargeterDelegate:
 322   View* TargetForRect(View* root, const gfx::Rect& rect) override {
 323     CHECK_EQ(root, this);
 324
 325     if (!views::UsePointBasedTargeting(rect))
 326       return ViewTargeterDelegate::TargetForRect(root, rect);
 327
 328     // Ignore the padding set on the button.
 329     gfx::Rect contents_bounds = GetContentsBounds();
 330     contents_bounds.set_x(GetMirroredXForRect(contents_bounds));
 331
 332 #if defined(USE_AURA)
 333     // Include the padding in hit-test for touch events.
 334     if (aura::Env::GetInstance()->is_touch_down())
 335       contents_bounds = GetLocalBounds();
 336 #endif
 337
 338     return contents_bounds.Intersects(rect) ? this : parent();
 339   }
 340
 341   // views:MaskedTargeterDelegate:
 342   bool GetHitTestMask(gfx::Path* mask) const override {
 343     DCHECK(mask);
 344     mask->reset();
 345
 346     // The parent tab may be partially occluded by another tab if we are
 347     // in stacked tab mode, which means that the tab close button may also
 348     // be partially occluded. Define the hit test mask of the tab close
 349     // button to be the intersection of the parent tab's visible bounds
 350     // and the bounds of the tab close button.
 351     gfx::Rect tab_bounds(GetTabBounds());
 352     gfx::Rect button_bounds(GetTabCloseButtonBounds(tab_bounds));
 353     gfx::Rect intersection(gfx::IntersectRects(tab_bounds, button_bounds));
 354
 355     if (!intersection.IsEmpty()) {
 356       mask->addRect(RectToSkRect(intersection));
 357       return true;
 358     }
 359
 360     return false;
 361   }
 362
 363   bool DoesIntersectRect(const View* target,
 364                          const gfx::Rect& rect) const override {
 365     CHECK_EQ(target, this);
 366
 367     // If the request is not made in response to a gesture, use the
 368     // default implementation.
 369     if (views::UsePointBasedTargeting(rect))
 370       return MaskedTargeterDelegate::DoesIntersectRect(target, rect);
 371
 372     // The hit test request is in response to a gesture. Return false if any
 373     // part of the tab close button is hidden from the user.
 374     // TODO(tdanderson): Consider always returning the intersection if the
 375     //                   non-rectangular shape of the tab can be accounted for.
 376     gfx::Rect tab_bounds(GetTabBounds());
 377     gfx::Rect button_bounds(GetTabCloseButtonBounds(tab_bounds));
 378     if (!tab_bounds.Contains(button_bounds))
 379       return false;
 380
 381     return MaskedTargeterDelegate::DoesIntersectRect(target, rect);
 382   }
 383
 384   Tab* tab_;
 385
 386   DISALLOW_COPY_AND_ASSIGN(TabCloseButton);
 387 };
 388
 389 ////////////////////////////////////////////////////////////////////////////////
 390 // ImageCacheEntry
 391
 392 Tab::ImageCacheEntry::ImageCacheEntry()
 393     : resource_id(-1),
 394       scale_factor(ui::SCALE_FACTOR_NONE) {
 395 }
 396
 397 Tab::ImageCacheEntry::~ImageCacheEntry() {}
 398
 399 ////////////////////////////////////////////////////////////////////////////////
 400 // Tab, statics:
 401
 402 // static
 403 const char Tab::kViewClassName[] = "Tab";
 404 Tab::TabImage Tab::tab_active_ = {0};
 405 Tab::TabImage Tab::tab_inactive_ = {0};
 406 Tab::TabImage Tab::tab_alpha_ = {0};
 407 Tab::ImageCache* Tab::image_cache_ = NULL;
 408
 409 ////////////////////////////////////////////////////////////////////////////////
 410 // Tab, public:
 411
 412 Tab::Tab(TabController* controller)
 413     : controller_(controller),
 414       closing_(false),
 415       dragging_(false),
 416       detached_(false),
 417       favicon_hiding_offset_(0),
 418       loading_animation_frame_(0),
 419       immersive_loading_step_(0),
 420       should_display_crashed_favicon_(false),
 421       close_button_(NULL),
 422       media_indicator_button_(NULL),
 423       title_(new views::Label()),
 424       tab_activated_with_last_tap_down_(false),
 425       hover_controller_(this),
 426       showing_icon_(false),
 427       showing_media_indicator_(false),
 428       showing_close_button_(false),
 429       close_button_color_(0) {
 430   DCHECK(controller);
 431   InitTabResources();
 432
 433   // So we get don't get enter/exit on children and don't prematurely stop the
 434   // hover.
 435   set_notify_enter_exit_on_child(true);
 436
 437   set_id(VIEW_ID_TAB);
 438
 439   title_->SetHorizontalAlignment(gfx::ALIGN_TO_HEAD);
 440   title_->SetElideBehavior(gfx::FADE_TAIL);
 441   title_->SetHandlesTooltips(false);
 442   title_->SetAutoColorReadabilityEnabled(false);
 443   title_->SetText(CoreTabHelper::GetDefaultTitle());
 444   AddChildView(title_);
 445
 446   SetEventTargeter(
 447       scoped_ptr<views::ViewTargeter>(new views::ViewTargeter(this)));
 448
 449   // Add the Close Button.
 450   close_button_ = new TabCloseButton(this);
 451   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
 452   close_button_->SetImage(views::CustomButton::STATE_NORMAL,
 453                           rb.GetImageSkiaNamed(IDR_CLOSE_1));
 454   close_button_->SetImage(views::CustomButton::STATE_HOVERED,
 455                           rb.GetImageSkiaNamed(IDR_CLOSE_1_H));
 456   close_button_->SetImage(views::CustomButton::STATE_PRESSED,
 457                           rb.GetImageSkiaNamed(IDR_CLOSE_1_P));
 458   close_button_->SetAccessibleName(
 459       l10n_util::GetStringUTF16(IDS_ACCNAME_CLOSE));
 460   // Disable animation so that the red danger sign shows up immediately
 461   // to help avoid mis-clicks.
 462   close_button_->SetAnimationDuration(0);
 463   AddChildView(close_button_);
 464
 465   set_context_menu_controller(this);
 466 }
 467
 468 Tab::~Tab() {
 469 }
 470
 471 void Tab::set_animation_container(gfx::AnimationContainer* container) {
 472   animation_container_ = container;
 473   hover_controller_.SetAnimationContainer(container);
 474 }
 475
 476 bool Tab::IsActive() const {
 477   return controller_->IsActiveTab(this);
 478 }
 479
 480 bool Tab::IsSelected() const {
 481   return controller_->IsTabSelected(this);
 482 }
 483
 484 void Tab::SetData(const TabRendererData& data) {
 485   if (data_.Equals(data))
 486     return;
 487
 488   TabRendererData old(data_);
 489   data_ = data;
 490
 491   base::string16 title = data_.title;
 492   if (title.empty()) {
 493     title = data_.loading ?
 494         l10n_util::GetStringUTF16(IDS_TAB_LOADING_TITLE) :
 495         CoreTabHelper::GetDefaultTitle();
 496   } else {
 497     Browser::FormatTitleForDisplay(&title);
 498   }
 499   title_->SetText(title);
 500
 501   if (data_.IsCrashed()) {
 502     if (!should_display_crashed_favicon_ && !IsPerformingCrashAnimation()) {
 503       data_.media_state = TAB_MEDIA_STATE_NONE;
 504 #if defined(OS_CHROMEOS)
 505       // On Chrome OS, we reload killed tabs automatically when the user
 506       // switches to them.  Don't display animations for these unless they're
 507       // selected (i.e. in the foreground) -- we won't reload these
 508       // automatically since we don't want to get into a crash loop.
 509       if (IsSelected() ||
 510           data_.crashed_status != base::TERMINATION_STATUS_PROCESS_WAS_KILLED)
 511         StartCrashAnimation();
 512 #else
 513       StartCrashAnimation();
 514 #endif
 515     }
 516   } else {
 517     if (IsPerformingCrashAnimation())
 518       StopCrashAnimation();
 519     ResetCrashedFavicon();
 520   }
 521
 522   if (data_.media_state != old.media_state)
 523     GetMediaIndicatorButton()->TransitionToMediaState(data_.media_state);
 524
 525   if (old.mini != data_.mini) {
 526     StopAndDeleteAnimation(mini_title_change_animation_.Pass());
 527   }
 528
 529   DataChanged(old);
 530
 531   Layout();
 532   SchedulePaint();
 533 }
 534
 535 void Tab::UpdateLoadingAnimation(TabRendererData::NetworkState state) {
 536   if (state == data_.network_state &&
 537       state == TabRendererData::NETWORK_STATE_NONE) {
 538     // If the network state is none and hasn't changed, do nothing. Otherwise we
 539     // need to advance the animation frame.
 540     return;
 541   }
 542
 543   TabRendererData::NetworkState old_state = data_.network_state;
 544   data_.network_state = state;
 545   AdvanceLoadingAnimation(old_state, state);
 546 }
 547
 548 void Tab::StartPulse() {
 549   pulse_animation_.reset(new gfx::ThrobAnimation(this));
 550   pulse_animation_->SetSlideDuration(kPulseDurationMs);
 551   if (animation_container_.get())
 552     pulse_animation_->SetContainer(animation_container_.get());
 553   pulse_animation_->StartThrobbing(std::numeric_limits<int>::max());
 554 }
 555
 556 void Tab::StopPulse() {
 557   StopAndDeleteAnimation(pulse_animation_.Pass());
 558 }
 559
 560 void Tab::StartMiniTabTitleAnimation() {
 561   if (!data().mini)
 562     return;
 563   if (!mini_title_change_animation_) {
 564     gfx::MultiAnimation::Parts parts;
 565     parts.push_back(
 566         gfx::MultiAnimation::Part(kMiniTitleChangeAnimationDuration1MS,
 567                                  gfx::Tween::EASE_OUT));
 568     parts.push_back(
 569         gfx::MultiAnimation::Part(kMiniTitleChangeAnimationDuration2MS,
 570                                  gfx::Tween::ZERO));
 571     parts.push_back(
 572         gfx::MultiAnimation::Part(kMiniTitleChangeAnimationDuration3MS,
 573                                  gfx::Tween::EASE_IN));
 574     parts[0].start_time_ms = kMiniTitleChangeAnimationStart1MS;
 575     parts[0].end_time_ms = kMiniTitleChangeAnimationEnd1MS;
 576     parts[2].start_time_ms = kMiniTitleChangeAnimationStart3MS;
 577     parts[2].end_time_ms = kMiniTitleChangeAnimationEnd3MS;
 578     base::TimeDelta timeout =
 579         base::TimeDelta::FromMilliseconds(kMiniTitleChangeAnimationIntervalMS);
 580     mini_title_change_animation_.reset(new gfx::MultiAnimation(parts, timeout));
 581     if (animation_container_.get())
 582       mini_title_change_animation_->SetContainer(animation_container_.get());
 583     mini_title_change_animation_->set_delegate(this);
 584   }
 585   mini_title_change_animation_->Start();
 586 }
 587
 588 void Tab::StopMiniTabTitleAnimation() {
 589   StopAndDeleteAnimation(mini_title_change_animation_.Pass());
 590 }
 591
 592 // static
 593 gfx::Size Tab::GetBasicMinimumUnselectedSize() {
 594   InitTabResources();
 595
 596   gfx::Size minimum_size;
 597   minimum_size.set_width(kLeftPadding + kRightPadding);
 598   // Since we use image images, the real minimum height of the image is
 599   // defined most accurately by the height of the end cap images.
 600   minimum_size.set_height(tab_active_.image_l->height());
 601   return minimum_size;
 602 }
 603
 604 gfx::Size Tab::GetMinimumUnselectedSize() {
 605   return GetBasicMinimumUnselectedSize();
 606 }
 607
 608 // static
 609 gfx::Size Tab::GetMinimumSelectedSize() {
 610   gfx::Size minimum_size = GetBasicMinimumUnselectedSize();
 611   minimum_size.set_width(
 612       kLeftPadding + gfx::kFaviconSize + kRightPadding);
 613   return minimum_size;
 614 }
 615
 616 // static
 617 gfx::Size Tab::GetStandardSize() {
 618   gfx::Size standard_size = GetBasicMinimumUnselectedSize();
 619   standard_size.set_width(
 620       standard_size.width() + kFaviconTitleSpacing + kStandardTitleWidth);
 621   return standard_size;
 622 }
 623
 624 // static
 625 int Tab::GetTouchWidth() {
 626   return kTouchWidth;
 627 }
 628
 629 // static
 630 int Tab::GetMiniWidth() {
 631   return kMiniTabWidth;
 632 }
 633
 634 // static
 635 int Tab::GetImmersiveHeight() {
 636   return kImmersiveTabHeight;
 637 }
 638
 639 ////////////////////////////////////////////////////////////////////////////////
 640 // Tab, AnimationDelegate overrides:
 641
 642 void Tab::AnimationProgressed(const gfx::Animation* animation) {
 643   // Ignore if the pulse animation is being performed on active tab because
 644   // it repaints the same image. See |Tab::PaintTabBackground()|.
 645   if (animation == pulse_animation_.get() && IsActive())
 646     return;
 647   SchedulePaint();
 648 }
 649
 650 void Tab::AnimationCanceled(const gfx::Animation* animation) {
 651   SchedulePaint();
 652 }
 653
 654 void Tab::AnimationEnded(const gfx::Animation* animation) {
 655   SchedulePaint();
 656 }
 657
 658 ////////////////////////////////////////////////////////////////////////////////
 659 // Tab, views::ButtonListener overrides:
 660
 661 void Tab::ButtonPressed(views::Button* sender, const ui::Event& event) {
 662   if (media_indicator_button_ && media_indicator_button_->visible()) {
 663     if (media_indicator_button_->enabled())
 664       content::RecordAction(UserMetricsAction("CloseTab_MuteToggleAvailable"));
 665     else if (data_.media_state == TAB_MEDIA_STATE_AUDIO_PLAYING)
 666       content::RecordAction(UserMetricsAction("CloseTab_AudioIndicator"));
 667     else
 668       content::RecordAction(UserMetricsAction("CloseTab_RecordingIndicator"));
 669   } else {
 670     content::RecordAction(UserMetricsAction("CloseTab_NoMediaIndicator"));
 671   }
 672
 673   const CloseTabSource source =
 674       (event.type() == ui::ET_MOUSE_RELEASED &&
 675        (event.flags() & ui::EF_FROM_TOUCH) == 0) ? CLOSE_TAB_FROM_MOUSE :
 676       CLOSE_TAB_FROM_TOUCH;
 677   DCHECK_EQ(close_button_, sender);
 678   controller_->CloseTab(this, source);
 679   if (event.type() == ui::ET_GESTURE_TAP)
 680     TouchUMA::RecordGestureAction(TouchUMA::GESTURE_TABCLOSE_TAP);
 681 }
 682
 683 ////////////////////////////////////////////////////////////////////////////////
 684 // Tab, views::ContextMenuController overrides:
 685
 686 void Tab::ShowContextMenuForView(views::View* source,
 687                                  const gfx::Point& point,
 688                                  ui::MenuSourceType source_type) {
 689   if (!closing())
 690     controller_->ShowContextMenuForTab(this, point, source_type);
 691 }
 692
 693 ////////////////////////////////////////////////////////////////////////////////
 694 // Tab, views::MaskedTargeterDelegate overrides:
 695
 696 bool Tab::GetHitTestMask(gfx::Path* mask) const {
 697   DCHECK(mask);
 698
 699   // When the window is maximized we don't want to shave off the edges or top
 700   // shadow of the tab, such that the user can click anywhere along the top
 701   // edge of the screen to select a tab. Ditto for immersive fullscreen.
 702   const views::Widget* widget = GetWidget();
 703   bool include_top_shadow =
 704       widget && (widget->IsMaximized() || widget->IsFullscreen());
 705   TabResources::GetHitTestMask(width(), height(), include_top_shadow, mask);
 706
 707   // It is possible for a portion of the tab to be occluded if tabs are
 708   // stacked, so modify the hit test mask to only include the visible
 709   // region of the tab.
 710   gfx::Rect clip;
 711   controller_->ShouldPaintTab(this, &clip);
 712   if (clip.size().GetArea()) {
 713     SkRect intersection(mask->getBounds());
 714     mask->reset();
 715     if (!intersection.intersect(RectToSkRect(clip)))
 716        return false;
 717     mask->addRect(intersection);
 718   }
 719   return true;
 720 }
 721
 722 ////////////////////////////////////////////////////////////////////////////////
 723 // Tab, views::View overrides:
 724
 725 void Tab::OnPaint(gfx::Canvas* canvas) {
 726   // Don't paint if we're narrower than we can render correctly. (This should
 727   // only happen during animations).
 728   if (width() < GetMinimumUnselectedSize().width() && !data().mini)
 729     return;
 730
 731   gfx::Rect clip;
 732   if (!controller_->ShouldPaintTab(this, &clip))
 733     return;
 734   if (!clip.IsEmpty()) {
 735     canvas->Save();
 736     canvas->ClipRect(clip);
 737   }
 738
 739   if (controller_->IsImmersiveStyle())
 740     PaintImmersiveTab(canvas);
 741   else
 742     PaintTab(canvas);
 743
 744   if (!clip.IsEmpty())
 745     canvas->Restore();
 746 }
 747
 748 void Tab::Layout() {
 749   gfx::Rect lb = GetContentsBounds();
 750   if (lb.IsEmpty())
 751     return;
 752
 753   lb.Inset(kLeftPadding, kTopPadding, kRightPadding, kBottomPadding);
 754   showing_icon_ = ShouldShowIcon();
 755   favicon_bounds_.SetRect(lb.x(), lb.y(), 0, 0);
 756   if (showing_icon_) {
 757     favicon_bounds_.set_size(gfx::Size(gfx::kFaviconSize, gfx::kFaviconSize));
 758     favicon_bounds_.set_y(lb.y() + (lb.height() - gfx::kFaviconSize + 1) / 2);
 759     MaybeAdjustLeftForMiniTab(&favicon_bounds_);
 760   }
 761
 762   showing_close_button_ = ShouldShowCloseBox();
 763   if (showing_close_button_) {
 764     // If the ratio of the close button size to tab width exceeds the maximum.
 765     // The close button should be as large as possible so that there is a larger
 766     // hit-target for touch events. So the close button bounds extends to the
 767     // edges of the tab. However, the larger hit-target should be active only
 768     // for mouse events, and the close-image should show up in the right place.
 769     // So a border is added to the button with necessary padding. The close
 770     // button (BaseTab::TabCloseButton) makes sure the padding is a hit-target
 771     // only for touch events.
 772     close_button_->SetBorder(views::Border::NullBorder());
 773     const gfx::Size close_button_size(close_button_->GetPreferredSize());
 774     const int top = lb.y() + (lb.height() - close_button_size.height() + 1) / 2;
 775     const int bottom = height() - (close_button_size.height() + top);
 776     const int left = kViewSpacing;
 777     const int right = width() - (lb.width() + close_button_size.width() + left);
 778     close_button_->SetBorder(
 779         views::Border::CreateEmptyBorder(top, left, bottom, right));
 780     close_button_->SetPosition(gfx::Point(lb.width(), 0));
 781     close_button_->SizeToPreferredSize();
 782   }
 783   close_button_->SetVisible(showing_close_button_);
 784
 785   showing_media_indicator_ = ShouldShowMediaIndicator();
 786   if (showing_media_indicator_) {
 787     views::ImageButton* const button = GetMediaIndicatorButton();
 788     const gfx::Size image_size(button->GetPreferredSize());
 789     const int right = showing_close_button_ ?
 790         close_button_->x() + close_button_->GetInsets().left() : lb.right();
 791     gfx::Rect bounds(
 792         std::max(lb.x(), right - image_size.width()),
 793         lb.y() + (lb.height() - image_size.height() + 1) / 2,
 794         image_size.width(),
 795         image_size.height());
 796     MaybeAdjustLeftForMiniTab(&bounds);
 797     button->SetBoundsRect(bounds);
 798     button->SetVisible(true);
 799   } else if (media_indicator_button_) {
 800     media_indicator_button_->SetVisible(false);
 801   }
 802
 803   // Size the title to fill the remaining width and use all available height.
 804   bool show_title = !data().mini || width() >= kMiniTabRendererAsNormalTabWidth;
 805   if (show_title) {
 806     int title_left = favicon_bounds_.right() + kFaviconTitleSpacing;
 807     int title_width = lb.width() - title_left;
 808     if (showing_media_indicator_) {
 809       title_width = media_indicator_button_->x() - kViewSpacing - title_left;
 810     } else if (close_button_->visible()) {
 811       // Allow the title to overlay the close button's empty border padding.
 812       title_width = close_button_->x() + close_button_->GetInsets().left() -
 813           kViewSpacing - title_left;
 814     }
 815     gfx::Rect rect(title_left, lb.y(), std::max(title_width, 0), lb.height());
 816     const int title_height = title_->GetPreferredSize().height();
 817     if (title_height > rect.height()) {
 818       rect.set_y(lb.y() - (title_height - rect.height()) / 2);
 819       rect.set_height(title_height);
 820     }
 821     title_->SetBoundsRect(rect);
 822   }
 823   title_->SetVisible(show_title);
 824 }
 825
 826 void Tab::OnThemeChanged() {
 827   LoadTabImages();
 828 }
 829
 830 const char* Tab::GetClassName() const {
 831   return kViewClassName;
 832 }
 833
 834 bool Tab::GetTooltipText(const gfx::Point& p, base::string16* tooltip) const {
 835   // Note: Anything that affects the tooltip text should be accounted for when
 836   // calling TooltipTextChanged() from Tab::DataChanged().
 837   *tooltip = chrome::AssembleTabTooltipText(data_.title, data_.media_state);
 838   return !tooltip->empty();
 839 }
 840
 841 bool Tab::GetTooltipTextOrigin(const gfx::Point& p, gfx::Point* origin) const {
 842   origin->set_x(title_->x() + 10);
 843   origin->set_y(-4);
 844   return true;
 845 }
 846
 847 bool Tab::OnMousePressed(const ui::MouseEvent& event) {
 848   controller_->OnMouseEventInTab(this, event);
 849
 850   // Allow a right click from touch to drag, which corresponds to a long click.
 851   if (event.IsOnlyLeftMouseButton() ||
 852       (event.IsOnlyRightMouseButton() && event.flags() & ui::EF_FROM_TOUCH)) {
 853     ui::ListSelectionModel original_selection;
 854     original_selection.Copy(controller_->GetSelectionModel());
 855     // Changing the selection may cause our bounds to change. If that happens
 856     // the location of the event may no longer be valid. Create a copy of the
 857     // event in the parents coordinate, which won't change, and recreate an
 858     // event after changing so the coordinates are correct.
 859     ui::MouseEvent event_in_parent(event, static_cast<View*>(this), parent());
 860     if (controller_->SupportsMultipleSelection()) {
 861       if (event.IsShiftDown() && event.IsControlDown()) {
 862         controller_->AddSelectionFromAnchorTo(this);
 863       } else if (event.IsShiftDown()) {
 864         controller_->ExtendSelectionTo(this);
 865       } else if (event.IsControlDown()) {
 866         controller_->ToggleSelected(this);
 867         if (!IsSelected()) {
 868           // Don't allow dragging non-selected tabs.
 869           return false;
 870         }
 871       } else if (!IsSelected()) {
 872         controller_->SelectTab(this);
 873       }
 874     } else if (!IsSelected()) {
 875       controller_->SelectTab(this);
 876     }
 877     ui::MouseEvent cloned_event(event_in_parent, parent(),
 878                                 static_cast<View*>(this));
 879     controller_->MaybeStartDrag(this, cloned_event, original_selection);
 880   }
 881   return true;
 882 }
 883
 884 bool Tab::OnMouseDragged(const ui::MouseEvent& event) {
 885   controller_->ContinueDrag(this, event);
 886   return true;
 887 }
 888
 889 void Tab::OnMouseReleased(const ui::MouseEvent& event) {
 890   controller_->OnMouseEventInTab(this, event);
 891
 892   // Notify the drag helper that we're done with any potential drag operations.
 893   // Clean up the drag helper, which is re-created on the next mouse press.
 894   // In some cases, ending the drag will schedule the tab for destruction; if
 895   // so, bail immediately, since our members are already dead and we shouldn't
 896   // do anything else except drop the tab where it is.
 897   if (controller_->EndDrag(END_DRAG_COMPLETE))
 898     return;
 899
 900   // Close tab on middle click, but only if the button is released over the tab
 901   // (normal windows behavior is to discard presses of a UI element where the
 902   // releases happen off the element).
 903   if (event.IsMiddleMouseButton()) {
 904     if (HitTestPoint(event.location())) {
 905       controller_->CloseTab(this, CLOSE_TAB_FROM_MOUSE);
 906     } else if (closing_) {
 907       // We're animating closed and a middle mouse button was pushed on us but
 908       // we don't contain the mouse anymore. We assume the user is clicking
 909       // quicker than the animation and we should close the tab that falls under
 910       // the mouse.
 911       Tab* closest_tab = controller_->GetTabAt(this, event.location());
 912       if (closest_tab)
 913         controller_->CloseTab(closest_tab, CLOSE_TAB_FROM_MOUSE);
 914     }
 915   } else if (event.IsOnlyLeftMouseButton() && !event.IsShiftDown() &&
 916              !event.IsControlDown()) {
 917     // If the tab was already selected mouse pressed doesn't change the
 918     // selection. Reset it now to handle the case where multiple tabs were
 919     // selected.
 920     controller_->SelectTab(this);
 921
 922     if (media_indicator_button_ && media_indicator_button_->visible() &&
 923         media_indicator_button_->bounds().Contains(event.location())) {
 924       content::RecordAction(UserMetricsAction("TabMediaIndicator_Clicked"));
 925     }
 926   }
 927 }
 928
 929 void Tab::OnMouseCaptureLost() {
 930   controller_->EndDrag(END_DRAG_CAPTURE_LOST);
 931 }
 932
 933 void Tab::OnMouseEntered(const ui::MouseEvent& event) {
 934   hover_controller_.Show(views::GlowHoverController::SUBTLE);
 935 }
 936
 937 void Tab::OnMouseMoved(const ui::MouseEvent& event) {
 938   hover_controller_.SetLocation(event.location());
 939   controller_->OnMouseEventInTab(this, event);
 940 }
 941
 942 void Tab::OnMouseExited(const ui::MouseEvent& event) {
 943   hover_controller_.Hide();
 944 }
 945
 946 void Tab::OnGestureEvent(ui::GestureEvent* event) {
 947   switch (event->type()) {
 948     case ui::ET_GESTURE_TAP_DOWN: {
 949       // TAP_DOWN is only dispatched for the first touch point.
 950       DCHECK_EQ(1, event->details().touch_points());
 951
 952       // See comment in OnMousePressed() as to why we copy the event.
 953       ui::GestureEvent event_in_parent(*event, static_cast<View*>(this),
 954                                        parent());
 955       ui::ListSelectionModel original_selection;
 956       original_selection.Copy(controller_->GetSelectionModel());
 957       tab_activated_with_last_tap_down_ = !IsActive();
 958       if (!IsSelected())
 959         controller_->SelectTab(this);
 960       gfx::Point loc(event->location());
 961       views::View::ConvertPointToScreen(this, &loc);
 962       ui::GestureEvent cloned_event(event_in_parent, parent(),
 963                                     static_cast<View*>(this));
 964       controller_->MaybeStartDrag(this, cloned_event, original_selection);
 965       break;
 966     }
 967
 968     case ui::ET_GESTURE_END:
 969       controller_->EndDrag(END_DRAG_COMPLETE);
 970       break;
 971
 972     case ui::ET_GESTURE_SCROLL_UPDATE:
 973       controller_->ContinueDrag(this, *event);
 974       break;
 975
 976     default:
 977       break;
 978   }
 979   event->SetHandled();
 980 }
 981
 982 void Tab::GetAccessibleState(ui::AXViewState* state) {
 983   state->role = ui::AX_ROLE_TAB;
 984   state->name = data_.title;
 985   state->AddStateFlag(ui::AX_STATE_MULTISELECTABLE);
 986   state->AddStateFlag(ui::AX_STATE_SELECTABLE);
 987   controller_->UpdateTabAccessibilityState(this, state);
 988   if (IsSelected())
 989     state->AddStateFlag(ui::AX_STATE_SELECTED);
 990 }
 991
 992 ////////////////////////////////////////////////////////////////////////////////
 993 // Tab, private
 994
 995 void Tab::MaybeAdjustLeftForMiniTab(gfx::Rect* bounds) const {
 996   if (!data().mini || width() >= kMiniTabRendererAsNormalTabWidth)
 997     return;
 998   const int mini_delta = kMiniTabRendererAsNormalTabWidth - GetMiniWidth();
 999   const int ideal_delta = width() - GetMiniWidth();
1000   const int ideal_x = (GetMiniWidth() - bounds->width()) / 2;
1001   bounds->set_x(bounds->x() + static_cast<int>(
1002       (1 - static_cast<float>(ideal_delta) / static_cast<float>(mini_delta)) *
1003       (ideal_x - bounds->x())));
1004 }
1005
1006 void Tab::DataChanged(const TabRendererData& old) {
1007   if (data().media_state != old.media_state || data().title != old.title)
1008     TooltipTextChanged();
1009
1010   if (data().blocked == old.blocked)
1011     return;
1012
1013   if (data().blocked)
1014     StartPulse();
1015   else
1016     StopPulse();
1017 }
1018
1019 void Tab::PaintTab(gfx::Canvas* canvas) {
1020   // See if the model changes whether the icons should be painted.
1021   const bool show_icon = ShouldShowIcon();
1022   const bool show_media_indicator = ShouldShowMediaIndicator();
1023   const bool show_close_button = ShouldShowCloseBox();
1024   if (show_icon != showing_icon_ ||
1025       show_media_indicator != showing_media_indicator_ ||
1026       show_close_button != showing_close_button_) {
1027     Layout();
1028   }
1029
1030   PaintTabBackground(canvas);
1031
1032   const SkColor title_color = GetThemeProvider()->GetColor(IsSelected() ?
1033       ThemeProperties::COLOR_TAB_TEXT :
1034       ThemeProperties::COLOR_BACKGROUND_TAB_TEXT);
1035   title_->SetVisible(!data().mini ||
1036                      width() > kMiniTabRendererAsNormalTabWidth);
1037   title_->SetEnabledColor(title_color);
1038
1039   if (show_icon)
1040     PaintIcon(canvas);
1041
1042   // If the close button color has changed, generate a new one.
1043   if (!close_button_color_ || title_color != close_button_color_) {
1044     close_button_color_ = title_color;
1045     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
1046     close_button_->SetBackground(close_button_color_,
1047         rb.GetImageSkiaNamed(IDR_CLOSE_1),
1048         rb.GetImageSkiaNamed(IDR_CLOSE_1_MASK));
1049   }
1050 }
1051
1052 void Tab::PaintImmersiveTab(gfx::Canvas* canvas) {
1053   // Use transparency for the draw-attention animation.
1054   int alpha = 255;
1055   if (pulse_animation_ && pulse_animation_->is_animating() && !data().mini) {
1056     alpha = pulse_animation_->CurrentValueBetween(
1057         255, static_cast<int>(255 * kImmersiveTabMinThrobOpacity));
1058   }
1059
1060   // Draw a gray rectangle to represent the tab. This works for mini-tabs as
1061   // well as regular ones. The active tab has a brigher bar.
1062   SkColor color =
1063       IsActive() ? kImmersiveActiveTabColor : kImmersiveInactiveTabColor;
1064   gfx::Rect bar_rect = GetImmersiveBarRect();
1065   canvas->FillRect(bar_rect, SkColorSetA(color, alpha));
1066
1067   // Paint network activity indicator.
1068   // TODO(jamescook): Replace this placeholder animation with a real one.
1069   // For now, let's go with a Cylon eye effect, but in blue.
1070   if (data().network_state != TabRendererData::NETWORK_STATE_NONE) {
1071     const SkColor kEyeColor = SkColorSetARGB(alpha, 71, 138, 217);
1072     int eye_width = bar_rect.width() / 3;
1073     int eye_offset = bar_rect.width() * immersive_loading_step_ /
1074         kImmersiveLoadingStepCount;
1075     if (eye_offset + eye_width < bar_rect.width()) {
1076       // Draw a single indicator strip because it fits inside |bar_rect|.
1077       gfx::Rect eye_rect(
1078           bar_rect.x() + eye_offset, 0, eye_width, kImmersiveBarHeight);
1079       canvas->FillRect(eye_rect, kEyeColor);
1080     } else {
1081       // Draw two indicators to simulate the eye "wrapping around" to the left
1082       // side. The first part fills the remainder of the bar.
1083       int right_eye_width = bar_rect.width() - eye_offset;
1084       gfx::Rect right_eye_rect(
1085           bar_rect.x() + eye_offset, 0, right_eye_width, kImmersiveBarHeight);
1086       canvas->FillRect(right_eye_rect, kEyeColor);
1087       // The second part parts the remaining |eye_width| on the left.
1088       int left_eye_width = eye_offset + eye_width - bar_rect.width();
1089       gfx::Rect left_eye_rect(
1090           bar_rect.x(), 0, left_eye_width, kImmersiveBarHeight);
1091       canvas->FillRect(left_eye_rect, kEyeColor);
1092     }
1093   }
1094 }
1095
1096 void Tab::PaintTabBackground(gfx::Canvas* canvas) {
1097   if (IsActive()) {
1098     PaintActiveTabBackground(canvas);
1099   } else {
1100     if (mini_title_change_animation_ &&
1101         mini_title_change_animation_->is_animating()) {
1102       PaintInactiveTabBackgroundWithTitleChange(canvas);
1103     } else {
1104       PaintInactiveTabBackground(canvas);
1105     }
1106
1107     double throb_value = GetThrobValue();
1108     if (throb_value > 0) {
1109       canvas->SaveLayerAlpha(static_cast<int>(throb_value * 0xff),
1110                              GetLocalBounds());
1111       PaintActiveTabBackground(canvas);
1112       canvas->Restore();
1113     }
1114   }
1115 }
1116
1117 void Tab::PaintInactiveTabBackgroundWithTitleChange(gfx::Canvas* canvas) {
1118   // Render the inactive tab background. We'll use this for clipping.
1119   gfx::Canvas background_canvas(size(), canvas->image_scale(), false);
1120   PaintInactiveTabBackground(&background_canvas);
1121
1122   gfx::ImageSkia background_image(background_canvas.ExtractImageRep());
1123
1124   // Draw a radial gradient to hover_canvas.
1125   gfx::Canvas hover_canvas(size(), canvas->image_scale(), false);
1126   int radius = kMiniTitleChangeGradientRadius;
1127   int x0 = width() + radius - kMiniTitleChangeInitialXOffset;
1128   int x1 = radius;
1129   int x2 = -radius;
1130   int x;
1131   if (mini_title_change_animation_->current_part_index() == 0) {
1132     x = mini_title_change_animation_->CurrentValueBetween(x0, x1);
1133   } else if (mini_title_change_animation_->current_part_index() == 1) {
1134     x = x1;
1135   } else {
1136     x = mini_title_change_animation_->CurrentValueBetween(x1, x2);
1137   }
1138   SkPoint center_point;
1139   center_point.iset(x, 0);
1140   SkColor colors[2] = { kMiniTitleChangeGradientColor1,
1141                         kMiniTitleChangeGradientColor2 };
1142   skia::RefPtr<SkShader> shader = skia::AdoptRef(
1143       SkGradientShader::CreateRadial(
1144           center_point, SkIntToScalar(radius), colors, NULL, 2,
1145           SkShader::kClamp_TileMode));
1146   SkPaint paint;
1147   paint.setShader(shader.get());
1148   hover_canvas.DrawRect(gfx::Rect(x - radius, -radius, radius * 2, radius * 2),
1149                         paint);
1150
1151   // Draw the radial gradient clipped to the background into hover_image.
1152   gfx::ImageSkia hover_image = gfx::ImageSkiaOperations::CreateMaskedImage(
1153       gfx::ImageSkia(hover_canvas.ExtractImageRep()), background_image);
1154
1155   // Draw the tab background to the canvas.
1156   canvas->DrawImageInt(background_image, 0, 0);
1157
1158   // And then the gradient on top of that.
1159   if (mini_title_change_animation_->current_part_index() == 2) {
1160     uint8 alpha = mini_title_change_animation_->CurrentValueBetween(255, 0);
1161     canvas->DrawImageInt(hover_image, 0, 0, alpha);
1162   } else {
1163     canvas->DrawImageInt(hover_image, 0, 0);
1164   }
1165 }
1166
1167 void Tab::PaintInactiveTabBackground(gfx::Canvas* canvas) {
1168   int tab_id;
1169   int frame_id;
1170   views::Widget* widget = GetWidget();
1171   GetTabIdAndFrameId(widget, &tab_id, &frame_id);
1172
1173   // Explicitly map the id so we cache correctly.
1174   const chrome::HostDesktopType host_desktop_type = GetHostDesktopType(this);
1175   tab_id = chrome::MapThemeImage(host_desktop_type, tab_id);
1176
1177   // HasCustomImage() is only true if the theme provides the image. However,
1178   // even if the theme does not provide a tab background, the theme machinery
1179   // will make one if given a frame image.
1180   ui::ThemeProvider* theme_provider = GetThemeProvider();
1181   const bool theme_provided_image = theme_provider->HasCustomImage(tab_id) ||
1182       (frame_id != 0 && theme_provider->HasCustomImage(frame_id));
1183
1184   const bool can_cache = !theme_provided_image &&
1185       !hover_controller_.ShouldDraw();
1186
1187   if (can_cache) {
1188     ui::ScaleFactor scale_factor =
1189         ui::GetSupportedScaleFactor(canvas->image_scale());
1190     gfx::ImageSkia cached_image(GetCachedImage(tab_id, size(), scale_factor));
1191     if (cached_image.width() == 0) {
1192       gfx::Canvas tmp_canvas(size(), canvas->image_scale(), false);
1193       PaintInactiveTabBackgroundUsingResourceId(&tmp_canvas, tab_id);
1194       cached_image = gfx::ImageSkia(tmp_canvas.ExtractImageRep());
1195       SetCachedImage(tab_id, scale_factor, cached_image);
1196     }
1197     canvas->DrawImageInt(cached_image, 0, 0);
1198   } else {
1199     PaintInactiveTabBackgroundUsingResourceId(canvas, tab_id);
1200   }
1201 }
1202
1203 void Tab::PaintInactiveTabBackgroundUsingResourceId(gfx::Canvas* canvas,
1204                                                     int tab_id) {
1205   // WARNING: the inactive tab background may be cached. If you change what it
1206   // is drawn from you may need to update whether it can be cached.
1207
1208   // The tab image needs to be lined up with the background image
1209   // so that it feels partially transparent.  These offsets represent the tab
1210   // position within the frame background image.
1211   int offset = GetMirroredX() + background_offset_.x();
1212
1213   gfx::ImageSkia* tab_bg = GetThemeProvider()->GetImageSkiaNamed(tab_id);
1214
1215   TabImage* tab_image = &tab_active_;
1216   TabImage* tab_inactive_image = &tab_inactive_;
1217   TabImage* alpha = &tab_alpha_;
1218
1219   // If the theme is providing a custom background image, then its top edge
1220   // should be at the top of the tab. Otherwise, we assume that the background
1221   // image is a composited foreground + frame image.
1222   int bg_offset_y = GetThemeProvider()->HasCustomImage(tab_id) ?
1223       0 : background_offset_.y();
1224
1225   // We need a gfx::Canvas object to be able to extract the image from.
1226   // We draw everything to this canvas and then output it to the canvas
1227   // parameter in addition to using it to mask the hover glow if needed.
1228   gfx::Canvas background_canvas(size(), canvas->image_scale(), false);
1229
1230   // Draw left edge.  Don't draw over the toolbar, as we're not the foreground
1231   // tab.
1232   gfx::ImageSkia tab_l = gfx::ImageSkiaOperations::CreateTiledImage(
1233       *tab_bg, offset, bg_offset_y, tab_image->l_width, height());
1234   gfx::ImageSkia theme_l =
1235       gfx::ImageSkiaOperations::CreateMaskedImage(tab_l, *alpha->image_l);
1236   background_canvas.DrawImageInt(theme_l,
1237       0, 0, theme_l.width(), theme_l.height() - kToolbarOverlap,
1238       0, 0, theme_l.width(), theme_l.height() - kToolbarOverlap,
1239       false);
1240
1241   // Draw right edge.  Again, don't draw over the toolbar.
1242   gfx::ImageSkia tab_r = gfx::ImageSkiaOperations::CreateTiledImage(*tab_bg,
1243       offset + width() - tab_image->r_width, bg_offset_y,
1244       tab_image->r_width, height());
1245   gfx::ImageSkia theme_r =
1246       gfx::ImageSkiaOperations::CreateMaskedImage(tab_r, *alpha->image_r);
1247   background_canvas.DrawImageInt(theme_r,
1248       0, 0, theme_r.width(), theme_r.height() - kToolbarOverlap,
1249       width() - theme_r.width(), 0, theme_r.width(),
1250       theme_r.height() - kToolbarOverlap, false);
1251
1252   // Draw center.  Instead of masking out the top portion we simply skip over
1253   // it by incrementing by GetDropShadowHeight(), since it's a simple
1254   // rectangle. And again, don't draw over the toolbar.
1255   background_canvas.TileImageInt(*tab_bg,
1256      offset + tab_image->l_width,
1257      bg_offset_y + kDropShadowHeight,
1258      tab_image->l_width,
1259      kDropShadowHeight,
1260      width() - tab_image->l_width - tab_image->r_width,
1261      height() - kDropShadowHeight - kToolbarOverlap);
1262
1263   canvas->DrawImageInt(
1264       gfx::ImageSkia(background_canvas.ExtractImageRep()), 0, 0);
1265
1266   if (!GetThemeProvider()->HasCustomImage(tab_id) &&
1267       hover_controller_.ShouldDraw()) {
1268     hover_controller_.Draw(canvas, gfx::ImageSkia(
1269         background_canvas.ExtractImageRep()));
1270   }
1271
1272   // Now draw the highlights/shadows around the tab edge.
1273   canvas->DrawImageInt(*tab_inactive_image->image_l, 0, 0);
1274   canvas->TileImageInt(*tab_inactive_image->image_c,
1275                        tab_inactive_image->l_width, 0,
1276                        width() - tab_inactive_image->l_width -
1277                            tab_inactive_image->r_width,
1278                        height());
1279   canvas->DrawImageInt(*tab_inactive_image->image_r,
1280                        width() - tab_inactive_image->r_width, 0);
1281 }
1282
1283 void Tab::PaintActiveTabBackground(gfx::Canvas* canvas) {
1284   gfx::ImageSkia* tab_background =
1285       GetThemeProvider()->GetImageSkiaNamed(IDR_THEME_TOOLBAR);
1286   int offset = GetMirroredX() + background_offset_.x();
1287
1288   TabImage* tab_image = &tab_active_;
1289   TabImage* alpha = &tab_alpha_;
1290
1291   // Draw left edge.
1292   gfx::ImageSkia tab_l = gfx::ImageSkiaOperations::CreateTiledImage(
1293       *tab_background, offset, 0, tab_image->l_width, height());
1294   gfx::ImageSkia theme_l =
1295       gfx::ImageSkiaOperations::CreateMaskedImage(tab_l, *alpha->image_l);
1296   canvas->DrawImageInt(theme_l, 0, 0);
1297
1298   // Draw right edge.
1299   gfx::ImageSkia tab_r = gfx::ImageSkiaOperations::CreateTiledImage(
1300       *tab_background,
1301       offset + width() - tab_image->r_width, 0, tab_image->r_width, height());
1302   gfx::ImageSkia theme_r =
1303       gfx::ImageSkiaOperations::CreateMaskedImage(tab_r, *alpha->image_r);
1304   canvas->DrawImageInt(theme_r, width() - tab_image->r_width, 0);
1305
1306   // Draw center.  Instead of masking out the top portion we simply skip over it
1307   // by incrementing by GetDropShadowHeight(), since it's a simple rectangle.
1308   canvas->TileImageInt(*tab_background,
1309      offset + tab_image->l_width,
1310      kDropShadowHeight,
1311      tab_image->l_width,
1312      kDropShadowHeight,
1313      width() - tab_image->l_width - tab_image->r_width,
1314      height() - kDropShadowHeight);
1315
1316   // Now draw the highlights/shadows around the tab edge.
1317   canvas->DrawImageInt(*tab_image->image_l, 0, 0);
1318   canvas->TileImageInt(*tab_image->image_c, tab_image->l_width, 0,
1319       width() - tab_image->l_width - tab_image->r_width, height());
1320   canvas->DrawImageInt(*tab_image->image_r, width() - tab_image->r_width, 0);
1321 }
1322
1323 void Tab::PaintIcon(gfx::Canvas* canvas) {
1324   gfx::Rect bounds = favicon_bounds_;
1325   if (bounds.IsEmpty())
1326     return;
1327
1328   bounds.set_x(GetMirroredXForRect(bounds));
1329
1330   if (data().network_state != TabRendererData::NETWORK_STATE_NONE) {
1331     // Paint network activity (aka throbber) animation frame.
1332     ui::ThemeProvider* tp = GetThemeProvider();
1333     gfx::ImageSkia frames(*tp->GetImageSkiaNamed(
1334         (data().network_state == TabRendererData::NETWORK_STATE_WAITING) ?
1335         IDR_THROBBER_WAITING : IDR_THROBBER));
1336
1337     int icon_size = frames.height();
1338     int image_offset = loading_animation_frame_ * icon_size;
1339     DrawIconCenter(canvas, frames, image_offset,
1340                    icon_size, icon_size,
1341                    bounds, false, SkPaint());
1342   } else if (should_display_crashed_favicon_) {
1343     // Paint crash favicon.
1344     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
1345     gfx::ImageSkia crashed_favicon(*rb.GetImageSkiaNamed(IDR_SAD_FAVICON));
1346     bounds.set_y(bounds.y() + favicon_hiding_offset_);
1347     DrawIconCenter(canvas, crashed_favicon, 0,
1348                    crashed_favicon.width(),
1349                    crashed_favicon.height(),
1350                    bounds, true, SkPaint());
1351   } else if (!data().favicon.isNull()) {
1352     // Paint the normal favicon.
1353     DrawIconCenter(canvas, data().favicon, 0,
1354                    data().favicon.width(),
1355                    data().favicon.height(),
1356                    bounds, true, SkPaint());
1357   }
1358 }
1359
1360 void Tab::AdvanceLoadingAnimation(TabRendererData::NetworkState old_state,
1361                                   TabRendererData::NetworkState state) {
1362   // TODO(robliao): Remove ScopedTracker below once crbug.com/461137 is fixed.
1363   tracked_objects::ScopedTracker tracking_profile1(
1364       FROM_HERE_WITH_EXPLICIT_FUNCTION("461137 Tab::AdvanceLoadingAnimation1"));
1365   static bool initialized = false;
1366   static int loading_animation_frame_count = 0;
1367   static int waiting_animation_frame_count = 0;
1368   static int waiting_to_loading_frame_count_ratio = 0;
1369   if (!initialized) {
1370     // TODO(robliao): Remove ScopedTracker below once crbug.com/461137 is fixed.
1371     tracked_objects::ScopedTracker tracking_profile2(
1372         FROM_HERE_WITH_EXPLICIT_FUNCTION(
1373             "461137 Tab::AdvanceLoadingAnimation2"));
1374     initialized = true;
1375     ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
1376     gfx::ImageSkia loading_animation(*rb.GetImageSkiaNamed(IDR_THROBBER));
1377     loading_animation_frame_count =
1378         loading_animation.width() / loading_animation.height();
1379     gfx::ImageSkia waiting_animation(*rb.GetImageSkiaNamed(
1380         IDR_THROBBER_WAITING));
1381     waiting_animation_frame_count =
1382         waiting_animation.width() / waiting_animation.height();
1383     waiting_to_loading_frame_count_ratio =
1384         waiting_animation_frame_count / loading_animation_frame_count;
1385
1386     base::debug::Alias(&loading_animation_frame_count);
1387     base::debug::Alias(&waiting_animation_frame_count);
1388     CHECK_NE(0, waiting_to_loading_frame_count_ratio) <<
1389         "Number of frames in IDR_THROBBER must be equal to or greater " <<
1390         "than the number of frames in IDR_THROBBER_WAITING. Please " <<
1391         "investigate how this happened and update http://crbug.com/132590, " <<
1392         "this is causing crashes in the wild.";
1393   }
1394
1395   // The waiting animation is the reverse of the loading animation, but at a
1396   // different rate - the following reverses and scales the animation_frame_
1397   // so that the frame is at an equivalent position when going from one
1398   // animation to the other.
1399   if (state != old_state) {
1400     loading_animation_frame_ = loading_animation_frame_count -
1401         (loading_animation_frame_ / waiting_to_loading_frame_count_ratio);
1402   }
1403
1404   if (state == TabRendererData::NETWORK_STATE_WAITING) {
1405     loading_animation_frame_ = (loading_animation_frame_ + 1) %
1406         waiting_animation_frame_count;
1407     // Waiting steps backwards.
1408     immersive_loading_step_ =
1409         (immersive_loading_step_ - 1 + kImmersiveLoadingStepCount) %
1410             kImmersiveLoadingStepCount;
1411   } else if (state == TabRendererData::NETWORK_STATE_LOADING) {
1412     loading_animation_frame_ = (loading_animation_frame_ + 1) %
1413         loading_animation_frame_count;
1414     immersive_loading_step_ = (immersive_loading_step_ + 1) %
1415         kImmersiveLoadingStepCount;
1416   } else {
1417     loading_animation_frame_ = 0;
1418     immersive_loading_step_ = 0;
1419   }
1420   if (controller_->IsImmersiveStyle()) {
1421     // TODO(robliao): Remove ScopedTracker below once crbug.com/461137 is fixed.
1422     tracked_objects::ScopedTracker tracking_profile3(
1423         FROM_HERE_WITH_EXPLICIT_FUNCTION(
1424             "461137 Tab::AdvanceLoadingAnimation3"));
1425     SchedulePaintInRect(GetImmersiveBarRect());
1426   } else {
1427     // TODO(robliao): Remove ScopedTracker below once crbug.com/461137 is fixed.
1428     tracked_objects::ScopedTracker tracking_profile4(
1429         FROM_HERE_WITH_EXPLICIT_FUNCTION(
1430             "461137 Tab::AdvanceLoadingAnimation4"));
1431     ScheduleIconPaint();
1432   }
1433 }
1434
1435 int Tab::IconCapacity() const {
1436   if (height() < GetMinimumUnselectedSize().height())
1437     return 0;
1438   const int available_width =
1439       std::max(0, width() - kLeftPadding - kRightPadding);
1440   const int width_per_icon = gfx::kFaviconSize;
1441   const int kPaddingBetweenIcons = 2;
1442   if (available_width >= width_per_icon &&
1443       available_width < (width_per_icon + kPaddingBetweenIcons)) {
1444     return 1;
1445   }
1446   return available_width / (width_per_icon + kPaddingBetweenIcons);
1447 }
1448
1449 bool Tab::ShouldShowIcon() const {
1450   return chrome::ShouldTabShowFavicon(
1451       IconCapacity(), data().mini, IsActive(), data().show_icon,
1452       media_indicator_button_ ? media_indicator_button_->showing_media_state() :
1453                                 data_.media_state);
1454 }
1455
1456 bool Tab::ShouldShowMediaIndicator() const {
1457   return chrome::ShouldTabShowMediaIndicator(
1458       IconCapacity(), data().mini, IsActive(), data().show_icon,
1459       media_indicator_button_ ? media_indicator_button_->showing_media_state() :
1460                                 data_.media_state);
1461 }
1462
1463 bool Tab::ShouldShowCloseBox() const {
1464   if (!IsActive() && controller_->ShouldHideCloseButtonForInactiveTab(this))
1465     return false;
1466
1467   return chrome::ShouldTabShowCloseButton(
1468       IconCapacity(), data().mini, IsActive());
1469 }
1470
1471 double Tab::GetThrobValue() {
1472   const bool is_selected = IsSelected();
1473   const double min = is_selected ? kSelectedTabOpacity : 0;
1474   const double scale = is_selected ? kSelectedTabThrobScale : 1;
1475
1476   // Showing both the pulse and title change animation at the same time is too
1477   // much.
1478   if (pulse_animation_ && pulse_animation_->is_animating() &&
1479       (!mini_title_change_animation_ ||
1480        !mini_title_change_animation_->is_animating())) {
1481     return pulse_animation_->GetCurrentValue() * kHoverOpacity * scale + min;
1482   }
1483
1484   if (hover_controller_.ShouldDraw()) {
1485     return kHoverOpacity * hover_controller_.GetAnimationValue() * scale +
1486         min;
1487   }
1488
1489   return is_selected ? kSelectedTabOpacity : 0;
1490 }
1491
1492 void Tab::SetFaviconHidingOffset(int offset) {
1493   favicon_hiding_offset_ = offset;
1494   ScheduleIconPaint();
1495 }
1496
1497 void Tab::DisplayCrashedFavicon() {
1498   should_display_crashed_favicon_ = true;
1499 }
1500
1501 void Tab::ResetCrashedFavicon() {
1502   should_display_crashed_favicon_ = false;
1503 }
1504
1505 void Tab::StopCrashAnimation() {
1506   crash_icon_animation_.reset();
1507 }
1508
1509 void Tab::StartCrashAnimation() {
1510   crash_icon_animation_.reset(new FaviconCrashAnimation(this));
1511   crash_icon_animation_->Start();
1512 }
1513
1514 bool Tab::IsPerformingCrashAnimation() const {
1515   return crash_icon_animation_.get() && data_.IsCrashed();
1516 }
1517
1518 void Tab::ScheduleIconPaint() {
1519   gfx::Rect bounds = favicon_bounds_;
1520   if (bounds.IsEmpty())
1521     return;
1522
1523   // Extends the area to the bottom when sad_favicon is animating.
1524   if (IsPerformingCrashAnimation())
1525     bounds.set_height(height() - bounds.y());
1526   bounds.set_x(GetMirroredXForRect(bounds));
1527   SchedulePaintInRect(bounds);
1528 }
1529
1530 gfx::Rect Tab::GetImmersiveBarRect() const {
1531   // The main bar is as wide as the normal tab's horizontal top line.
1532   // This top line of the tab extends a few pixels left and right of the
1533   // center image due to pixels in the rounded corner images.
1534   const int kBarPadding = 1;
1535   int main_bar_left = tab_active_.l_width - kBarPadding;
1536   int main_bar_right = width() - tab_active_.r_width + kBarPadding;
1537   return gfx::Rect(
1538       main_bar_left, 0, main_bar_right - main_bar_left, kImmersiveBarHeight);
1539 }
1540
1541 void Tab::GetTabIdAndFrameId(views::Widget* widget,
1542                              int* tab_id,
1543                              int* frame_id) const {
1544   if (widget &&
1545       widget->GetTopLevelWidget()->ShouldWindowContentsBeTransparent()) {
1546     *tab_id = IDR_THEME_TAB_BACKGROUND_V;
1547     *frame_id = 0;
1548   } else if (data().incognito) {
1549     *tab_id = IDR_THEME_TAB_BACKGROUND_INCOGNITO;
1550     *frame_id = IDR_THEME_FRAME_INCOGNITO;
1551   } else {
1552     *tab_id = IDR_THEME_TAB_BACKGROUND;
1553     *frame_id = IDR_THEME_FRAME;
1554   }
1555 }
1556
1557 MediaIndicatorButton* Tab::GetMediaIndicatorButton() {
1558   if (!media_indicator_button_) {
1559     media_indicator_button_ = new MediaIndicatorButton();
1560     AddChildView(media_indicator_button_);  // Takes ownership.
1561   }
1562   return media_indicator_button_;
1563 }
1564
1565 ////////////////////////////////////////////////////////////////////////////////
1566 // Tab, private static:
1567
1568 // static
1569 void Tab::InitTabResources() {
1570   static bool initialized = false;
1571   if (initialized)
1572     return;
1573
1574   initialized = true;
1575   image_cache_ = new ImageCache();
1576
1577   // Load the tab images once now, and maybe again later if the theme changes.
1578   LoadTabImages();
1579 }
1580
1581 // static
1582 void Tab::LoadTabImages() {
1583   // We're not letting people override tab images just yet.
1584   ui::ResourceBundle& rb = ui::ResourceBundle::GetSharedInstance();
1585
1586   tab_alpha_.image_l = rb.GetImageSkiaNamed(IDR_TAB_ALPHA_LEFT);
1587   tab_alpha_.image_r = rb.GetImageSkiaNamed(IDR_TAB_ALPHA_RIGHT);
1588
1589   tab_active_.image_l = rb.GetImageSkiaNamed(IDR_TAB_ACTIVE_LEFT);
1590   tab_active_.image_c = rb.GetImageSkiaNamed(IDR_TAB_ACTIVE_CENTER);
1591   tab_active_.image_r = rb.GetImageSkiaNamed(IDR_TAB_ACTIVE_RIGHT);
1592   tab_active_.l_width = tab_active_.image_l->width();
1593   tab_active_.r_width = tab_active_.image_r->width();
1594
1595   tab_inactive_.image_l = rb.GetImageSkiaNamed(IDR_TAB_INACTIVE_LEFT);
1596   tab_inactive_.image_c = rb.GetImageSkiaNamed(IDR_TAB_INACTIVE_CENTER);
1597   tab_inactive_.image_r = rb.GetImageSkiaNamed(IDR_TAB_INACTIVE_RIGHT);
1598   tab_inactive_.l_width = tab_inactive_.image_l->width();
1599   tab_inactive_.r_width = tab_inactive_.image_r->width();
1600 }
1601
1602 // static
1603 gfx::ImageSkia Tab::GetCachedImage(int resource_id,
1604                                    const gfx::Size& size,
1605                                    ui::ScaleFactor scale_factor) {
1606   for (ImageCache::const_iterator i = image_cache_->begin();
1607        i != image_cache_->end(); ++i) {
1608     if (i->resource_id == resource_id && i->scale_factor == scale_factor &&
1609         i->image.size() == size) {
1610       return i->image;
1611     }
1612   }
1613   return gfx::ImageSkia();
1614 }
1615
1616 // static
1617 void Tab::SetCachedImage(int resource_id,
1618                          ui::ScaleFactor scale_factor,
1619                          const gfx::ImageSkia& image) {
1620   DCHECK_NE(scale_factor, ui::SCALE_FACTOR_NONE);
1621   ImageCacheEntry entry;
1622   entry.resource_id = resource_id;
1623   entry.scale_factor = scale_factor;
1624   entry.image = image;
1625   image_cache_->push_front(entry);
1626   if (image_cache_->size() > kMaxImageCacheSize)
1627     image_cache_->pop_back();
1628 }