chrome/browser/ui/views/status_bubble_views.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/status_bubble_views.h"
   6
   7 #include <algorithm>
   8
   9 #include "base/bind.h"
  10 #include "base/i18n/rtl.h"
  11 #include "base/location.h"
  12 #include "base/single_thread_task_runner.h"
  13 #include "base/strings/string_util.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/thread_task_runner_handle.h"
  16 #include "chrome/browser/themes/theme_properties.h"
  17 #include "components/url_formatter/elide_url.h"
  18 #include "components/url_formatter/url_formatter.h"
  19 #include "third_party/skia/include/core/SkPaint.h"
  20 #include "third_party/skia/include/core/SkRRect.h"
  21 #include "ui/base/theme_provider.h"
  22 #include "ui/gfx/animation/animation_delegate.h"
  23 #include "ui/gfx/animation/linear_animation.h"
  24 #include "ui/gfx/canvas.h"
  25 #include "ui/gfx/font_list.h"
  26 #include "ui/gfx/geometry/point.h"
  27 #include "ui/gfx/geometry/rect.h"
  28 #include "ui/gfx/screen.h"
  29 #include "ui/gfx/skia_util.h"
  30 #include "ui/gfx/text_elider.h"
  31 #include "ui/gfx/text_utils.h"
  32 #include "ui/native_theme/native_theme.h"
  33 #include "ui/views/controls/scrollbar/native_scroll_bar.h"
  34 #include "ui/views/widget/root_view.h"
  35 #include "ui/views/widget/widget.h"
  36 #include "url/gurl.h"
  37
  38 #if defined(USE_ASH)
  39 #include "ash/wm/window_state.h"
  40 #endif
  41
  42 // The alpha and color of the bubble's shadow.
  43 static const SkColor kShadowColor = SkColorSetARGB(30, 0, 0, 0);
  44
  45 // The roundedness of the edges of our bubble.
  46 static const int kBubbleCornerRadius = 4;
  47
  48 // How close the mouse can get to the infobubble before it starts sliding
  49 // off-screen.
  50 static const int kMousePadding = 20;
  51
  52 // The horizontal offset of the text within the status bubble, not including the
  53 // outer shadow ring.
  54 static const int kTextPositionX = 3;
  55
  56 // The minimum horizontal space between the (right) end of the text and the edge
  57 // of the status bubble, not including the outer shadow ring.
  58 static const int kTextHorizPadding = 1;
  59
  60 // Delays before we start hiding or showing the bubble after we receive a
  61 // show or hide request.
  62 static const int kShowDelay = 80;
  63 static const int kHideDelay = 250;
  64
  65 // How long each fade should last for.
  66 static const int kShowFadeDurationMS = 120;
  67 static const int kHideFadeDurationMS = 200;
  68 static const int kFramerate = 25;
  69
  70 // How long each expansion step should take.
  71 static const int kMinExpansionStepDurationMS = 20;
  72 static const int kMaxExpansionStepDurationMS = 150;
  73
  74
  75 // StatusBubbleViews::StatusViewAnimation --------------------------------------
  76 class StatusBubbleViews::StatusViewAnimation : public gfx::LinearAnimation,
  77                                                public gfx::AnimationDelegate {
  78  public:
  79   StatusViewAnimation(StatusView* status_view,
  80                       double opacity_start,
  81                       double opacity_end);
  82   ~StatusViewAnimation() override;
  83
  84   double GetCurrentOpacity();
  85
  86  private:
  87   // gfx::LinearAnimation:
  88   void AnimateToState(double state) override;
  89
  90   // gfx::AnimationDelegate:
  91   void AnimationEnded(const Animation* animation) override;
  92
  93   StatusView* status_view_;
  94
  95   // Start and end opacities for the current transition - note that as a
  96   // fade-in can easily turn into a fade out, opacity_start_ is sometimes
  97   // a value between 0 and 1.
  98   double opacity_start_;
  99   double opacity_end_;
 100
 101   DISALLOW_COPY_AND_ASSIGN(StatusViewAnimation);
 102 };
 103
 104
 105 // StatusBubbleViews::StatusView -----------------------------------------------
 106 //
 107 // StatusView manages the display of the bubble, applying text changes and
 108 // fading in or out the bubble as required.
 109 class StatusBubbleViews::StatusView : public views::View {
 110  public:
 111   // The bubble can be in one of many states:
 112   enum BubbleState {
 113     BUBBLE_HIDDEN,         // Entirely BUBBLE_HIDDEN.
 114     BUBBLE_HIDING_FADE,    // In a fade-out transition.
 115     BUBBLE_HIDING_TIMER,   // Waiting before a fade-out.
 116     BUBBLE_SHOWING_TIMER,  // Waiting before a fade-in.
 117     BUBBLE_SHOWING_FADE,   // In a fade-in transition.
 118     BUBBLE_SHOWN           // Fully visible.
 119   };
 120
 121   enum BubbleStyle {
 122     STYLE_BOTTOM,
 123     STYLE_FLOATING,
 124     STYLE_STANDARD,
 125     STYLE_STANDARD_RIGHT
 126   };
 127
 128   StatusView(views::Widget* popup,
 129              ui::ThemeProvider* theme_provider);
 130   ~StatusView() override;
 131
 132   // Set the bubble text to a certain value, hides the bubble if text is
 133   // an empty string.  Trigger animation sequence to display if
 134   // |should_animate_open|.
 135   void SetText(const base::string16& text, bool should_animate_open);
 136
 137   BubbleState state() const { return state_; }
 138   BubbleStyle style() const { return style_; }
 139   void SetStyle(BubbleStyle style);
 140
 141   // Show the bubble instantly.
 142   void Show();
 143
 144   // Hide the bubble instantly.
 145   void Hide();
 146
 147   // Resets any timers we have. Typically called when the user moves a
 148   // mouse.
 149   void ResetTimer();
 150
 151   // This call backs the StatusView in order to fade the bubble in and out.
 152   void SetOpacity(double opacity);
 153
 154   // Depending on the state of the bubble this will either hide the popup or
 155   // not.
 156   void OnAnimationEnded();
 157
 158  private:
 159   class InitialTimer;
 160
 161   // Manage the timers that control the delay before a fade begins or ends.
 162   void StartTimer(base::TimeDelta time);
 163   void OnTimer();
 164   void CancelTimer();
 165   void RestartTimer(base::TimeDelta delay);
 166
 167   // Manage the fades and starting and stopping the animations correctly.
 168   void StartFade(double start, double end, int duration);
 169   void StartHiding();
 170   void StartShowing();
 171
 172   // views::View:
 173   const char* GetClassName() const override;
 174   void OnPaint(gfx::Canvas* canvas) override;
 175
 176   BubbleState state_;
 177   BubbleStyle style_;
 178
 179   scoped_ptr<StatusViewAnimation> animation_;
 180
 181   // Handle to the widget that contains us.
 182   views::Widget* popup_;
 183
 184   // The currently-displayed text.
 185   base::string16 text_;
 186
 187   // Holds the theme provider of the frame that created us.
 188   ui::ThemeProvider* theme_service_;
 189
 190   base::WeakPtrFactory<StatusBubbleViews::StatusView> timer_factory_;
 191
 192   DISALLOW_COPY_AND_ASSIGN(StatusView);
 193 };
 194
 195 StatusBubbleViews::StatusView::StatusView(views::Widget* popup,
 196                                           ui::ThemeProvider* theme_provider)
 197     : state_(BUBBLE_HIDDEN),
 198       style_(STYLE_STANDARD),
 199       animation_(new StatusViewAnimation(this, 0, 0)),
 200       popup_(popup),
 201       theme_service_(theme_provider),
 202       timer_factory_(this) {
 203 }
 204
 205 StatusBubbleViews::StatusView::~StatusView() {
 206   animation_->Stop();
 207   CancelTimer();
 208 }
 209
 210 void StatusBubbleViews::StatusView::SetText(const base::string16& text,
 211                                             bool should_animate_open) {
 212   if (text.empty()) {
 213     // The string was empty.
 214     StartHiding();
 215   } else {
 216     // We want to show the string.
 217     if (text != text_) {
 218       text_ = text;
 219       SchedulePaint();
 220     }
 221     if (should_animate_open)
 222       StartShowing();
 223   }
 224 }
 225
 226 void StatusBubbleViews::StatusView::Show() {
 227   animation_->Stop();
 228   CancelTimer();
 229   SetOpacity(1.0);
 230   popup_->ShowInactive();
 231   state_ = BUBBLE_SHOWN;
 232 }
 233
 234 void StatusBubbleViews::StatusView::Hide() {
 235   animation_->Stop();
 236   CancelTimer();
 237   SetOpacity(0.0);
 238   text_.clear();
 239   popup_->Hide();
 240   state_ = BUBBLE_HIDDEN;
 241 }
 242
 243 void StatusBubbleViews::StatusView::StartTimer(base::TimeDelta time) {
 244   if (timer_factory_.HasWeakPtrs())
 245     timer_factory_.InvalidateWeakPtrs();
 246
 247   base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
 248       FROM_HERE, base::Bind(&StatusBubbleViews::StatusView::OnTimer,
 249                             timer_factory_.GetWeakPtr()),
 250       time);
 251 }
 252
 253 void StatusBubbleViews::StatusView::OnTimer() {
 254   if (state_ == BUBBLE_HIDING_TIMER) {
 255     state_ = BUBBLE_HIDING_FADE;
 256     StartFade(1.0, 0.0, kHideFadeDurationMS);
 257   } else if (state_ == BUBBLE_SHOWING_TIMER) {
 258     state_ = BUBBLE_SHOWING_FADE;
 259     StartFade(0.0, 1.0, kShowFadeDurationMS);
 260   }
 261 }
 262
 263 void StatusBubbleViews::StatusView::CancelTimer() {
 264   if (timer_factory_.HasWeakPtrs())
 265     timer_factory_.InvalidateWeakPtrs();
 266 }
 267
 268 void StatusBubbleViews::StatusView::RestartTimer(base::TimeDelta delay) {
 269   CancelTimer();
 270   StartTimer(delay);
 271 }
 272
 273 void StatusBubbleViews::StatusView::ResetTimer() {
 274   if (state_ == BUBBLE_SHOWING_TIMER) {
 275     // We hadn't yet begun showing anything when we received a new request
 276     // for something to show, so we start from scratch.
 277     RestartTimer(base::TimeDelta::FromMilliseconds(kShowDelay));
 278   }
 279 }
 280
 281 void StatusBubbleViews::StatusView::StartFade(double start,
 282                                               double end,
 283                                               int duration) {
 284   animation_.reset(new StatusViewAnimation(this, start, end));
 285
 286   // This will also reset the currently-occurring animation.
 287   animation_->SetDuration(duration);
 288   animation_->Start();
 289 }
 290
 291 void StatusBubbleViews::StatusView::StartHiding() {
 292   if (state_ == BUBBLE_SHOWN) {
 293     state_ = BUBBLE_HIDING_TIMER;
 294     StartTimer(base::TimeDelta::FromMilliseconds(kHideDelay));
 295   } else if (state_ == BUBBLE_SHOWING_TIMER) {
 296     state_ = BUBBLE_HIDDEN;
 297     popup_->Hide();
 298     CancelTimer();
 299   } else if (state_ == BUBBLE_SHOWING_FADE) {
 300     state_ = BUBBLE_HIDING_FADE;
 301     // Figure out where we are in the current fade.
 302     double current_opacity = animation_->GetCurrentOpacity();
 303
 304     // Start a fade in the opposite direction.
 305     StartFade(current_opacity, 0.0,
 306               static_cast<int>(kHideFadeDurationMS * current_opacity));
 307   }
 308 }
 309
 310 void StatusBubbleViews::StatusView::StartShowing() {
 311   if (state_ == BUBBLE_HIDDEN) {
 312     popup_->ShowInactive();
 313     state_ = BUBBLE_SHOWING_TIMER;
 314     StartTimer(base::TimeDelta::FromMilliseconds(kShowDelay));
 315   } else if (state_ == BUBBLE_HIDING_TIMER) {
 316     state_ = BUBBLE_SHOWN;
 317     CancelTimer();
 318   } else if (state_ == BUBBLE_HIDING_FADE) {
 319     // We're partway through a fade.
 320     state_ = BUBBLE_SHOWING_FADE;
 321
 322     // Figure out where we are in the current fade.
 323     double current_opacity = animation_->GetCurrentOpacity();
 324
 325     // Start a fade in the opposite direction.
 326     StartFade(current_opacity, 1.0,
 327               static_cast<int>(kShowFadeDurationMS * current_opacity));
 328   } else if (state_ == BUBBLE_SHOWING_TIMER) {
 329     // We hadn't yet begun showing anything when we received a new request
 330     // for something to show, so we start from scratch.
 331     ResetTimer();
 332   }
 333 }
 334
 335 void StatusBubbleViews::StatusView::SetOpacity(double opacity) {
 336   popup_->SetOpacity(static_cast<unsigned char>(opacity * 255));
 337 }
 338
 339 void StatusBubbleViews::StatusView::SetStyle(BubbleStyle style) {
 340   if (style_ != style) {
 341     style_ = style;
 342     SchedulePaint();
 343   }
 344 }
 345
 346 void StatusBubbleViews::StatusView::OnAnimationEnded() {
 347   if (state_ == BUBBLE_HIDING_FADE) {
 348     state_ = BUBBLE_HIDDEN;
 349     popup_->Hide();
 350   } else if (state_ == BUBBLE_SHOWING_FADE) {
 351     state_ = BUBBLE_SHOWN;
 352   }
 353 }
 354
 355 const char* StatusBubbleViews::StatusView::GetClassName() const {
 356   return "StatusBubbleViews::StatusView";
 357 }
 358
 359 void StatusBubbleViews::StatusView::OnPaint(gfx::Canvas* canvas) {
 360   SkPaint paint;
 361   paint.setStyle(SkPaint::kFill_Style);
 362   paint.setAntiAlias(true);
 363   SkColor toolbar_color = theme_service_->GetColor(
 364       ThemeProperties::COLOR_TOOLBAR);
 365   paint.setColor(toolbar_color);
 366
 367   gfx::Rect popup_bounds = popup_->GetWindowBoundsInScreen();
 368
 369   SkScalar rad[8] = {};
 370
 371   // Top Edges - if the bubble is in its bottom position (sticking downwards),
 372   // then we square the top edges. Otherwise, we square the edges based on the
 373   // position of the bubble within the window (the bubble is positioned in the
 374   // southeast corner in RTL and in the southwest corner in LTR).
 375   if (style_ != STYLE_BOTTOM) {
 376     if (base::i18n::IsRTL() != (style_ == STYLE_STANDARD_RIGHT)) {
 377       // The text is RtL or the bubble is on the right side (but not both).
 378
 379       // Top Left corner.
 380       rad[0] = kBubbleCornerRadius;
 381       rad[1] = kBubbleCornerRadius;
 382     } else {
 383       // Top Right corner.
 384       rad[2] = kBubbleCornerRadius;
 385       rad[3] = kBubbleCornerRadius;
 386     }
 387   }
 388
 389   // Bottom edges - Keep these squared off if the bubble is in its standard
 390   // position (sticking upward).
 391   if (style_ != STYLE_STANDARD && style_ != STYLE_STANDARD_RIGHT) {
 392     // Bottom Right Corner.
 393     rad[4] = kBubbleCornerRadius;
 394     rad[5] = kBubbleCornerRadius;
 395
 396     // Bottom Left Corner.
 397     rad[6] = kBubbleCornerRadius;
 398     rad[7] = kBubbleCornerRadius;
 399   }
 400
 401   // Draw the bubble's shadow.
 402   int width = popup_bounds.width();
 403   int height = popup_bounds.height();
 404   gfx::Rect rect(gfx::Rect(popup_bounds.size()));
 405   SkPaint shadow_paint;
 406   shadow_paint.setAntiAlias(true);
 407   shadow_paint.setColor(kShadowColor);
 408
 409   SkRRect rrect;
 410   rrect.setRectRadii(RectToSkRect(rect), (const SkVector*)rad);
 411   canvas->sk_canvas()->drawRRect(rrect, shadow_paint);
 412
 413   const int shadow_size = 2 * kShadowThickness;
 414   // Draw the bubble.
 415   rect.SetRect(SkIntToScalar(kShadowThickness), SkIntToScalar(kShadowThickness),
 416                SkIntToScalar(width - shadow_size),
 417                SkIntToScalar(height - shadow_size));
 418   rrect.setRectRadii(RectToSkRect(rect), (const SkVector*)rad);
 419   canvas->sk_canvas()->drawRRect(rrect, paint);
 420
 421   // Draw highlight text and then the text body. In order to make sure the text
 422   // is aligned to the right on RTL UIs, we mirror the text bounds if the
 423   // locale is RTL.
 424   const gfx::FontList font_list;
 425   int text_width =
 426       std::min(gfx::GetStringWidth(text_, font_list),
 427                width - shadow_size - kTextPositionX - kTextHorizPadding);
 428   int text_height = height - shadow_size;
 429   gfx::Rect body_bounds(kShadowThickness + kTextPositionX,
 430                         kShadowThickness,
 431                         std::max(0, text_width),
 432                         std::max(0, text_height));
 433   body_bounds.set_x(GetMirroredXForRect(body_bounds));
 434   SkColor text_color =
 435       theme_service_->GetColor(ThemeProperties::COLOR_STATUS_BAR_TEXT);
 436   canvas->DrawStringRect(text_, font_list, text_color, body_bounds);
 437 }
 438
 439
 440 // StatusBubbleViews::StatusViewAnimation --------------------------------------
 441
 442 StatusBubbleViews::StatusViewAnimation::StatusViewAnimation(
 443     StatusView* status_view,
 444     double opacity_start,
 445     double opacity_end)
 446     : gfx::LinearAnimation(kFramerate, this),
 447       status_view_(status_view),
 448       opacity_start_(opacity_start),
 449       opacity_end_(opacity_end) {
 450 }
 451
 452 StatusBubbleViews::StatusViewAnimation::~StatusViewAnimation() {
 453   // Remove ourself as a delegate so that we don't get notified when
 454   // animations end as a result of destruction.
 455   set_delegate(NULL);
 456 }
 457
 458 double StatusBubbleViews::StatusViewAnimation::GetCurrentOpacity() {
 459   return opacity_start_ + (opacity_end_ - opacity_start_) *
 460       gfx::LinearAnimation::GetCurrentValue();
 461 }
 462
 463 void StatusBubbleViews::StatusViewAnimation::AnimateToState(double state) {
 464   status_view_->SetOpacity(GetCurrentOpacity());
 465 }
 466
 467 void StatusBubbleViews::StatusViewAnimation::AnimationEnded(
 468     const gfx::Animation* animation) {
 469   status_view_->SetOpacity(opacity_end_);
 470   status_view_->OnAnimationEnded();
 471 }
 472
 473 // StatusBubbleViews::StatusViewExpander ---------------------------------------
 474 //
 475 // Manages the expansion and contraction of the status bubble as it accommodates
 476 // URLs too long to fit in the standard bubble. Changes are passed through the
 477 // StatusView to paint.
 478 class StatusBubbleViews::StatusViewExpander : public gfx::LinearAnimation,
 479                                               public gfx::AnimationDelegate {
 480  public:
 481   StatusViewExpander(StatusBubbleViews* status_bubble,
 482                      StatusView* status_view)
 483       : gfx::LinearAnimation(kFramerate, this),
 484         status_bubble_(status_bubble),
 485         status_view_(status_view),
 486         expansion_start_(0),
 487         expansion_end_(0) {
 488   }
 489
 490   // Manage the expansion of the bubble.
 491   void StartExpansion(const base::string16& expanded_text,
 492                       int current_width,
 493                       int expansion_end);
 494
 495   // Set width of fully expanded bubble.
 496   void SetExpandedWidth(int expanded_width);
 497
 498  private:
 499   // Animation functions.
 500   int GetCurrentBubbleWidth();
 501   void SetBubbleWidth(int width);
 502   void AnimateToState(double state) override;
 503   void AnimationEnded(const gfx::Animation* animation) override;
 504
 505   // Manager that owns us.
 506   StatusBubbleViews* status_bubble_;
 507
 508   // Change the bounds and text of this view.
 509   StatusView* status_view_;
 510
 511   // Text elided (if needed) to fit maximum status bar width.
 512   base::string16 expanded_text_;
 513
 514   // Widths at expansion start and end.
 515   int expansion_start_;
 516   int expansion_end_;
 517 };
 518
 519 void StatusBubbleViews::StatusViewExpander::AnimateToState(double state) {
 520   SetBubbleWidth(GetCurrentBubbleWidth());
 521 }
 522
 523 void StatusBubbleViews::StatusViewExpander::AnimationEnded(
 524     const gfx::Animation* animation) {
 525   SetBubbleWidth(expansion_end_);
 526   status_view_->SetText(expanded_text_, false);
 527 }
 528
 529 void StatusBubbleViews::StatusViewExpander::StartExpansion(
 530     const base::string16& expanded_text,
 531     int expansion_start,
 532     int expansion_end) {
 533   expanded_text_ = expanded_text;
 534   expansion_start_ = expansion_start;
 535   expansion_end_ = expansion_end;
 536   int min_duration = std::max(kMinExpansionStepDurationMS,
 537       static_cast<int>(kMaxExpansionStepDurationMS *
 538           (expansion_end - expansion_start) / 100.0));
 539   SetDuration(std::min(kMaxExpansionStepDurationMS, min_duration));
 540   Start();
 541 }
 542
 543 int StatusBubbleViews::StatusViewExpander::GetCurrentBubbleWidth() {
 544   return static_cast<int>(expansion_start_ +
 545       (expansion_end_ - expansion_start_) *
 546           gfx::LinearAnimation::GetCurrentValue());
 547 }
 548
 549 void StatusBubbleViews::StatusViewExpander::SetBubbleWidth(int width) {
 550   status_bubble_->SetBubbleWidth(width);
 551   status_view_->SchedulePaint();
 552 }
 553
 554
 555 // StatusBubbleViews -----------------------------------------------------------
 556
 557 const int StatusBubbleViews::kShadowThickness = 1;
 558
 559 StatusBubbleViews::StatusBubbleViews(views::View* base_view)
 560     : contains_mouse_(false),
 561       offset_(0),
 562       base_view_(base_view),
 563       view_(NULL),
 564       download_shelf_is_visible_(false),
 565       is_expanded_(false),
 566       expand_timer_factory_(this) {
 567   expand_view_.reset();
 568 }
 569
 570 StatusBubbleViews::~StatusBubbleViews() {
 571   CancelExpandTimer();
 572   if (popup_.get())
 573     popup_->CloseNow();
 574 }
 575
 576 void StatusBubbleViews::Init() {
 577   if (!popup_.get()) {
 578     popup_.reset(new views::Widget);
 579     views::Widget* frame = base_view_->GetWidget();
 580     if (!view_)
 581       view_ = new StatusView(popup_.get(), frame->GetThemeProvider());
 582     if (!expand_view_.get())
 583       expand_view_.reset(new StatusViewExpander(this, view_));
 584     // On Windows use TYPE_MENU to ensure that this window uses the software
 585     // compositor which avoids the UI thread blocking issue during command
 586     // buffer creation. We can revert this change once http://crbug.com/125248
 587     // is fixed.
 588 #if defined(OS_WIN)
 589     views::Widget::InitParams params(views::Widget::InitParams::TYPE_MENU);
 590     // The menu style assumes a top most window. We don't want that in this
 591     // case.
 592     params.keep_on_top = false;
 593 #else
 594     views::Widget::InitParams params(views::Widget::InitParams::TYPE_POPUP);
 595 #endif
 596     params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW;
 597     params.accept_events = false;
 598     params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
 599     params.parent = frame->GetNativeView();
 600     params.context = frame->GetNativeWindow();
 601     popup_->Init(params);
 602     // We do our own animation and don't want any from the system.
 603     popup_->SetVisibilityChangedAnimationsEnabled(false);
 604     popup_->SetOpacity(0x00);
 605     popup_->SetContentsView(view_);
 606 #if defined(USE_ASH)
 607     ash::wm::GetWindowState(popup_->GetNativeWindow())->
 608         set_ignored_by_shelf(true);
 609 #endif
 610     RepositionPopup();
 611   }
 612 }
 613
 614 void StatusBubbleViews::Reposition() {
 615   // In restored mode, the client area has a client edge between it and the
 616   // frame.
 617   int overlap = kShadowThickness;
 618   int height = GetPreferredSize().height();
 619   int base_view_height = base_view()->bounds().height();
 620   gfx::Point origin(-overlap, base_view_height - height + overlap);
 621   SetBounds(origin.x(), origin.y(), base_view()->bounds().width() / 3, height);
 622 }
 623
 624 void StatusBubbleViews::RepositionPopup() {
 625   if (popup_.get()) {
 626     gfx::Point top_left;
 627     views::View::ConvertPointToScreen(base_view_, &top_left);
 628
 629     popup_->SetBounds(gfx::Rect(top_left.x() + position_.x(),
 630                                 top_left.y() + position_.y(),
 631                                 size_.width(), size_.height()));
 632   }
 633 }
 634
 635 gfx::Size StatusBubbleViews::GetPreferredSize() {
 636   return gfx::Size(0, gfx::FontList().GetHeight() + kTotalVerticalPadding);
 637 }
 638
 639 void StatusBubbleViews::SetBounds(int x, int y, int w, int h) {
 640   original_position_.SetPoint(x, y);
 641   position_.SetPoint(base_view_->GetMirroredXWithWidthInView(x, w), y);
 642   size_.SetSize(w, h);
 643   RepositionPopup();
 644   if (popup_.get() && contains_mouse_)
 645     AvoidMouse(last_mouse_moved_location_);
 646 }
 647
 648 void StatusBubbleViews::SetStatus(const base::string16& status_text) {
 649   if (size_.IsEmpty())
 650     return;  // We have no bounds, don't attempt to show the popup.
 651
 652   if (status_text_ == status_text && !status_text.empty())
 653     return;
 654
 655   if (!IsFrameVisible())
 656     return;  // Don't show anything if the parent isn't visible.
 657
 658   Init();
 659   status_text_ = status_text;
 660   if (!status_text_.empty()) {
 661     view_->SetText(status_text, true);
 662     view_->Show();
 663   } else if (!url_text_.empty()) {
 664     view_->SetText(url_text_, true);
 665   } else {
 666     view_->SetText(base::string16(), true);
 667   }
 668 }
 669
 670 void StatusBubbleViews::SetURL(const GURL& url, const std::string& languages) {
 671   url_ = url;
 672   languages_ = languages;
 673   if (size_.IsEmpty())
 674     return;  // We have no bounds, don't attempt to show the popup.
 675
 676   Init();
 677
 678   // If we want to clear a displayed URL but there is a status still to
 679   // display, display that status instead.
 680   if (url.is_empty() && !status_text_.empty()) {
 681     url_text_ = base::string16();
 682     if (IsFrameVisible())
 683       view_->SetText(status_text_, true);
 684     return;
 685   }
 686
 687   // Reset expansion state only when bubble is completely hidden.
 688   if (view_->state() == StatusView::BUBBLE_HIDDEN) {
 689     is_expanded_ = false;
 690     SetBubbleWidth(GetStandardStatusBubbleWidth());
 691   }
 692
 693   // Set Elided Text corresponding to the GURL object.
 694   gfx::Rect popup_bounds = popup_->GetWindowBoundsInScreen();
 695   int text_width = static_cast<int>(popup_bounds.width() -
 696       (kShadowThickness * 2) - kTextPositionX - kTextHorizPadding - 1);
 697   url_text_ =
 698       url_formatter::ElideUrl(url, gfx::FontList(), text_width, languages);
 699
 700   // An URL is always treated as a left-to-right string. On right-to-left UIs
 701   // we need to explicitly mark the URL as LTR to make sure it is displayed
 702   // correctly.
 703   url_text_ = base::i18n::GetDisplayStringInLTRDirectionality(url_text_);
 704
 705   if (IsFrameVisible()) {
 706     view_->SetText(url_text_, true);
 707
 708     CancelExpandTimer();
 709
 710     // If bubble is already in expanded state, shift to adjust to new text
 711     // size (shrinking or expanding). Otherwise delay.
 712     if (is_expanded_ && !url.is_empty()) {
 713       ExpandBubble();
 714     } else if (url_formatter::FormatUrl(url, languages).length() >
 715                url_text_.length()) {
 716       base::ThreadTaskRunnerHandle::Get()->PostDelayedTask(
 717           FROM_HERE, base::Bind(&StatusBubbleViews::ExpandBubble,
 718                                 expand_timer_factory_.GetWeakPtr()),
 719           base::TimeDelta::FromMilliseconds(kExpandHoverDelayMS));
 720     }
 721   }
 722 }
 723
 724 void StatusBubbleViews::Hide() {
 725   status_text_ = base::string16();
 726   url_text_ = base::string16();
 727   if (view_)
 728     view_->Hide();
 729 }
 730
 731 void StatusBubbleViews::MouseMoved(const gfx::Point& location,
 732                                    bool left_content) {
 733   contains_mouse_ = !left_content;
 734   if (left_content) {
 735     RepositionPopup();
 736     return;
 737   }
 738   last_mouse_moved_location_ = location;
 739
 740   if (view_) {
 741     view_->ResetTimer();
 742
 743     if (view_->state() != StatusView::BUBBLE_HIDDEN &&
 744         view_->state() != StatusView::BUBBLE_HIDING_FADE &&
 745         view_->state() != StatusView::BUBBLE_HIDING_TIMER) {
 746       AvoidMouse(location);
 747     }
 748   }
 749 }
 750
 751 void StatusBubbleViews::UpdateDownloadShelfVisibility(bool visible) {
 752   download_shelf_is_visible_ = visible;
 753 }
 754
 755 void StatusBubbleViews::AvoidMouse(const gfx::Point& location) {
 756   // Get the position of the frame.
 757   gfx::Point top_left;
 758   views::View::ConvertPointToScreen(base_view_, &top_left);
 759   // Border included.
 760   int window_width = base_view_->GetLocalBounds().width();
 761
 762   // Get the cursor position relative to the popup.
 763   gfx::Point relative_location = location;
 764   if (base::i18n::IsRTL()) {
 765     int top_right_x = top_left.x() + window_width;
 766     relative_location.set_x(top_right_x - relative_location.x());
 767   } else {
 768     relative_location.set_x(
 769         relative_location.x() - (top_left.x() + position_.x()));
 770   }
 771   relative_location.set_y(
 772       relative_location.y() - (top_left.y() + position_.y()));
 773
 774   // If the mouse is in a position where we think it would move the
 775   // status bubble, figure out where and how the bubble should be moved.
 776   if (relative_location.y() > -kMousePadding &&
 777       relative_location.x() < size_.width() + kMousePadding) {
 778     int offset = kMousePadding + relative_location.y();
 779
 780     // Make the movement non-linear.
 781     offset = offset * offset / kMousePadding;
 782
 783     // When the mouse is entering from the right, we want the offset to be
 784     // scaled by how horizontally far away the cursor is from the bubble.
 785     if (relative_location.x() > size_.width()) {
 786       offset = static_cast<int>(static_cast<float>(offset) * (
 787           static_cast<float>(kMousePadding -
 788               (relative_location.x() - size_.width())) /
 789           static_cast<float>(kMousePadding)));
 790     }
 791
 792     // Cap the offset and change the visual presentation of the bubble
 793     // depending on where it ends up (so that rounded corners square off
 794     // and mate to the edges of the tab content).
 795     if (offset >= size_.height() - kShadowThickness * 2) {
 796       offset = size_.height() - kShadowThickness * 2;
 797       view_->SetStyle(StatusView::STYLE_BOTTOM);
 798     } else if (offset > kBubbleCornerRadius / 2 - kShadowThickness) {
 799       view_->SetStyle(StatusView::STYLE_FLOATING);
 800     } else {
 801       view_->SetStyle(StatusView::STYLE_STANDARD);
 802     }
 803
 804     // Check if the bubble sticks out from the monitor or will obscure
 805     // download shelf.
 806     gfx::NativeView window = base_view_->GetWidget()->GetNativeView();
 807     gfx::Rect monitor_rect = gfx::Screen::GetScreenFor(window)->
 808         GetDisplayNearestWindow(window).work_area();
 809     const int bubble_bottom_y = top_left.y() + position_.y() + size_.height();
 810
 811     if (bubble_bottom_y + offset > monitor_rect.height() ||
 812         (download_shelf_is_visible_ &&
 813          (view_->style() == StatusView::STYLE_FLOATING ||
 814           view_->style() == StatusView::STYLE_BOTTOM))) {
 815       // The offset is still too large. Move the bubble to the right and reset
 816       // Y offset_ to zero.
 817       view_->SetStyle(StatusView::STYLE_STANDARD_RIGHT);
 818       offset_ = 0;
 819
 820       // Subtract border width + bubble width.
 821       int right_position_x = window_width - (position_.x() + size_.width());
 822       popup_->SetBounds(gfx::Rect(top_left.x() + right_position_x,
 823                                   top_left.y() + position_.y(),
 824                                   size_.width(), size_.height()));
 825     } else {
 826       offset_ = offset;
 827       popup_->SetBounds(gfx::Rect(top_left.x() + position_.x(),
 828                                   top_left.y() + position_.y() + offset_,
 829                                   size_.width(), size_.height()));
 830     }
 831   } else if (offset_ != 0 ||
 832       view_->style() == StatusView::STYLE_STANDARD_RIGHT) {
 833     offset_ = 0;
 834     view_->SetStyle(StatusView::STYLE_STANDARD);
 835     popup_->SetBounds(gfx::Rect(top_left.x() + position_.x(),
 836                                 top_left.y() + position_.y(),
 837                                 size_.width(), size_.height()));
 838   }
 839 }
 840
 841 bool StatusBubbleViews::IsFrameVisible() {
 842   views::Widget* frame = base_view_->GetWidget();
 843   if (!frame->IsVisible())
 844     return false;
 845
 846   views::Widget* window = frame->GetTopLevelWidget();
 847   return !window || !window->IsMinimized();
 848 }
 849
 850 bool StatusBubbleViews::IsFrameMaximized() {
 851   views::Widget* frame = base_view_->GetWidget();
 852   views::Widget* window = frame->GetTopLevelWidget();
 853   return window && window->IsMaximized();
 854 }
 855
 856 void StatusBubbleViews::ExpandBubble() {
 857   // Elide URL to maximum possible size, then check actual length (it may
 858   // still be too long to fit) before expanding bubble.
 859   gfx::Rect popup_bounds = popup_->GetWindowBoundsInScreen();
 860   int max_status_bubble_width = GetMaxStatusBubbleWidth();
 861   const gfx::FontList font_list;
 862   url_text_ = url_formatter::ElideUrl(url_, font_list, max_status_bubble_width,
 863                                        languages_);
 864   int expanded_bubble_width =
 865       std::max(GetStandardStatusBubbleWidth(),
 866                std::min(gfx::GetStringWidth(url_text_, font_list) +
 867                             (kShadowThickness * 2) + kTextPositionX +
 868                             kTextHorizPadding + 1,
 869                         max_status_bubble_width));
 870   is_expanded_ = true;
 871   expand_view_->StartExpansion(url_text_, popup_bounds.width(),
 872                                expanded_bubble_width);
 873 }
 874
 875 int StatusBubbleViews::GetStandardStatusBubbleWidth() {
 876   return base_view_->bounds().width() / 3;
 877 }
 878
 879 int StatusBubbleViews::GetMaxStatusBubbleWidth() {
 880   const ui::NativeTheme* theme = base_view_->GetNativeTheme();
 881   return static_cast<int>(std::max(0, base_view_->bounds().width() -
 882       (kShadowThickness * 2) - kTextPositionX - kTextHorizPadding - 1 -
 883       views::NativeScrollBar::GetVerticalScrollBarWidth(theme)));
 884 }
 885
 886 void StatusBubbleViews::SetBubbleWidth(int width) {
 887   size_.set_width(width);
 888   SetBounds(original_position_.x(), original_position_.y(),
 889             size_.width(), size_.height());
 890 }
 891
 892 void StatusBubbleViews::CancelExpandTimer() {
 893   if (expand_timer_factory_.HasWeakPtrs())
 894     expand_timer_factory_.InvalidateWeakPtrs();
 895 }