ui/views/bubble/tray_bubble_view.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "ui/views/bubble/tray_bubble_view.h"
   6
   7 #include <algorithm>
   8
   9 #include "third_party/skia/include/core/SkCanvas.h"
  10 #include "third_party/skia/include/core/SkColor.h"
  11 #include "third_party/skia/include/core/SkPaint.h"
  12 #include "third_party/skia/include/core/SkPath.h"
  13 #include "third_party/skia/include/effects/SkBlurImageFilter.h"
  14 #include "ui/accessibility/ax_view_state.h"
  15 #include "ui/aura/window.h"
  16 #include "ui/compositor/layer.h"
  17 #include "ui/compositor/layer_delegate.h"
  18 #include "ui/compositor/paint_recorder.h"
  19 #include "ui/events/event.h"
  20 #include "ui/gfx/canvas.h"
  21 #include "ui/gfx/geometry/insets.h"
  22 #include "ui/gfx/geometry/rect.h"
  23 #include "ui/gfx/path.h"
  24 #include "ui/gfx/skia_util.h"
  25 #include "ui/views/bubble/bubble_frame_view.h"
  26 #include "ui/views/bubble/bubble_window_targeter.h"
  27 #include "ui/views/layout/box_layout.h"
  28 #include "ui/views/widget/widget.h"
  29
  30 namespace {
  31
  32 // Inset the arrow a bit from the edge.
  33 const int kArrowMinOffset = 20;
  34 const int kBubbleSpacing = 20;
  35
  36 // The new theme adjusts the menus / bubbles to be flush with the shelf when
  37 // there is no bubble. These are the offsets which need to be applied.
  38 const int kArrowOffsetTopBottom = 4;
  39 const int kArrowOffsetLeft = 9;
  40 const int kArrowOffsetRight = -5;
  41 const int kOffsetLeftRightForTopBottomOrientation = 5;
  42
  43 // The sampling time for mouse position changes in ms - which is roughly a frame
  44 // time.
  45 const int kFrameTimeInMS = 30;
  46 }  // namespace
  47
  48 namespace views {
  49
  50 namespace internal {
  51
  52 // Detects any mouse movement. This is needed to detect mouse movements by the
  53 // user over the bubble if the bubble got created underneath the cursor.
  54 class MouseMoveDetectorHost : public MouseWatcherHost {
  55  public:
  56   MouseMoveDetectorHost();
  57   ~MouseMoveDetectorHost() override;
  58
  59   bool Contains(const gfx::Point& screen_point, MouseEventType type) override;
  60
  61  private:
  62   DISALLOW_COPY_AND_ASSIGN(MouseMoveDetectorHost);
  63 };
  64
  65 MouseMoveDetectorHost::MouseMoveDetectorHost() {
  66 }
  67
  68 MouseMoveDetectorHost::~MouseMoveDetectorHost() {
  69 }
  70
  71 bool MouseMoveDetectorHost::Contains(const gfx::Point& screen_point,
  72                                      MouseEventType type) {
  73   return false;
  74 }
  75
  76 // Custom border for TrayBubbleView. Contains special logic for GetBounds()
  77 // to stack bubbles with no arrows correctly. Also calculates the arrow offset.
  78 class TrayBubbleBorder : public BubbleBorder {
  79  public:
  80   TrayBubbleBorder(View* owner,
  81                    View* anchor,
  82                    TrayBubbleView::InitParams params)
  83       : BubbleBorder(params.arrow, params.shadow, params.arrow_color),
  84         owner_(owner),
  85         anchor_(anchor),
  86         tray_arrow_offset_(params.arrow_offset),
  87         first_item_has_no_margin_(params.first_item_has_no_margin) {
  88     set_alignment(params.arrow_alignment);
  89     set_background_color(params.arrow_color);
  90     set_paint_arrow(params.arrow_paint_type);
  91   }
  92
  93   ~TrayBubbleBorder() override {}
  94
  95   // Overridden from BubbleBorder.
  96   // Sets the bubble on top of the anchor when it has no arrow.
  97   gfx::Rect GetBounds(const gfx::Rect& position_relative_to,
  98                       const gfx::Size& contents_size) const override {
  99     if (has_arrow(arrow())) {
 100       gfx::Rect rect =
 101           BubbleBorder::GetBounds(position_relative_to, contents_size);
 102       if (first_item_has_no_margin_) {
 103         if (arrow() == BubbleBorder::BOTTOM_RIGHT ||
 104             arrow() == BubbleBorder::BOTTOM_LEFT) {
 105           rect.set_y(rect.y() + kArrowOffsetTopBottom);
 106           int rtl_factor = base::i18n::IsRTL() ? -1 : 1;
 107           rect.set_x(rect.x() +
 108                      rtl_factor * kOffsetLeftRightForTopBottomOrientation);
 109         } else if (arrow() == BubbleBorder::LEFT_BOTTOM) {
 110           rect.set_x(rect.x() + kArrowOffsetLeft);
 111         } else if (arrow() == BubbleBorder::RIGHT_BOTTOM) {
 112           rect.set_x(rect.x() + kArrowOffsetRight);
 113         }
 114       }
 115       return rect;
 116     }
 117
 118     gfx::Size border_size(contents_size);
 119     gfx::Insets insets = GetInsets();
 120     border_size.Enlarge(insets.width(), insets.height());
 121     const int x = position_relative_to.x() +
 122         position_relative_to.width() / 2 - border_size.width() / 2;
 123     // Position the bubble on top of the anchor.
 124     const int y = position_relative_to.y() - border_size.height() +
 125         insets.height() - kBubbleSpacing;
 126     return gfx::Rect(x, y, border_size.width(), border_size.height());
 127   }
 128
 129   void UpdateArrowOffset() {
 130     int arrow_offset = 0;
 131     if (arrow() == BubbleBorder::BOTTOM_RIGHT ||
 132         arrow() == BubbleBorder::BOTTOM_LEFT) {
 133       // Note: tray_arrow_offset_ is relative to the anchor widget.
 134       if (tray_arrow_offset_ ==
 135           TrayBubbleView::InitParams::kArrowDefaultOffset) {
 136         arrow_offset = kArrowMinOffset;
 137       } else {
 138         const int width = owner_->GetWidget()->GetContentsView()->width();
 139         gfx::Point pt(tray_arrow_offset_, 0);
 140         View::ConvertPointToScreen(anchor_->GetWidget()->GetRootView(), &pt);
 141         View::ConvertPointFromScreen(owner_->GetWidget()->GetRootView(), &pt);
 142         arrow_offset = pt.x();
 143         if (arrow() == BubbleBorder::BOTTOM_RIGHT)
 144           arrow_offset = width - arrow_offset;
 145         arrow_offset = std::max(arrow_offset, kArrowMinOffset);
 146       }
 147     } else {
 148       if (tray_arrow_offset_ ==
 149           TrayBubbleView::InitParams::kArrowDefaultOffset) {
 150         arrow_offset = kArrowMinOffset;
 151       } else {
 152         gfx::Point pt(0, tray_arrow_offset_);
 153         View::ConvertPointToScreen(anchor_->GetWidget()->GetRootView(), &pt);
 154         View::ConvertPointFromScreen(owner_->GetWidget()->GetRootView(), &pt);
 155         arrow_offset = pt.y();
 156         arrow_offset = std::max(arrow_offset, kArrowMinOffset);
 157       }
 158     }
 159     set_arrow_offset(arrow_offset);
 160   }
 161
 162  private:
 163   View* owner_;
 164   View* anchor_;
 165   const int tray_arrow_offset_;
 166
 167   // If true the first item should not get any additional spacing against the
 168   // anchor (without the bubble tip the bubble should be flush to the shelf).
 169   const bool first_item_has_no_margin_;
 170
 171   DISALLOW_COPY_AND_ASSIGN(TrayBubbleBorder);
 172 };
 173
 174 // This mask layer clips the bubble's content so that it does not overwrite the
 175 // rounded bubble corners.
 176 // TODO(miket): This does not work on Windows. Implement layer masking or
 177 // alternate solutions if the TrayBubbleView is needed there in the future.
 178 class TrayBubbleContentMask : public ui::LayerDelegate {
 179  public:
 180   explicit TrayBubbleContentMask(int corner_radius);
 181   ~TrayBubbleContentMask() override;
 182
 183   ui::Layer* layer() { return &layer_; }
 184
 185   // Overridden from LayerDelegate.
 186   void OnPaintLayer(const ui::PaintContext& context) override;
 187   void OnDelegatedFrameDamage(const gfx::Rect& damage_rect_in_dip) override {}
 188   void OnDeviceScaleFactorChanged(float device_scale_factor) override;
 189   base::Closure PrepareForLayerBoundsChange() override;
 190
 191  private:
 192   ui::Layer layer_;
 193   int corner_radius_;
 194
 195   DISALLOW_COPY_AND_ASSIGN(TrayBubbleContentMask);
 196 };
 197
 198 TrayBubbleContentMask::TrayBubbleContentMask(int corner_radius)
 199     : layer_(ui::LAYER_TEXTURED),
 200       corner_radius_(corner_radius) {
 201   layer_.set_delegate(this);
 202 }
 203
 204 TrayBubbleContentMask::~TrayBubbleContentMask() {
 205   layer_.set_delegate(NULL);
 206 }
 207
 208 void TrayBubbleContentMask::OnPaintLayer(const ui::PaintContext& context) {
 209   ui::PaintRecorder recorder(context);
 210   SkPaint paint;
 211   paint.setAlpha(255);
 212   paint.setStyle(SkPaint::kFill_Style);
 213   gfx::Rect rect(layer()->bounds().size());
 214   recorder.canvas()->DrawRoundRect(rect, corner_radius_, paint);
 215 }
 216
 217 void TrayBubbleContentMask::OnDeviceScaleFactorChanged(
 218     float device_scale_factor) {
 219   // Redrawing will take care of scale factor change.
 220 }
 221
 222 base::Closure TrayBubbleContentMask::PrepareForLayerBoundsChange() {
 223   return base::Closure();
 224 }
 225
 226 // Custom layout for the bubble-view. Does the default box-layout if there is
 227 // enough height. Otherwise, makes sure the bottom rows are visible.
 228 class BottomAlignedBoxLayout : public BoxLayout {
 229  public:
 230   explicit BottomAlignedBoxLayout(TrayBubbleView* bubble_view)
 231       : BoxLayout(BoxLayout::kVertical, 0, 0, 0),
 232         bubble_view_(bubble_view) {
 233   }
 234
 235   ~BottomAlignedBoxLayout() override {}
 236
 237  private:
 238   void Layout(View* host) override {
 239     if (host->height() >= host->GetPreferredSize().height() ||
 240         !bubble_view_->is_gesture_dragging()) {
 241       BoxLayout::Layout(host);
 242       return;
 243     }
 244
 245     int consumed_height = 0;
 246     for (int i = host->child_count() - 1;
 247         i >= 0 && consumed_height < host->height(); --i) {
 248       View* child = host->child_at(i);
 249       if (!child->visible())
 250         continue;
 251       gfx::Size size = child->GetPreferredSize();
 252       child->SetBounds(0, host->height() - consumed_height - size.height(),
 253           host->width(), size.height());
 254       consumed_height += size.height();
 255     }
 256   }
 257
 258   TrayBubbleView* bubble_view_;
 259
 260   DISALLOW_COPY_AND_ASSIGN(BottomAlignedBoxLayout);
 261 };
 262
 263 }  // namespace internal
 264
 265 using internal::TrayBubbleBorder;
 266 using internal::TrayBubbleContentMask;
 267 using internal::BottomAlignedBoxLayout;
 268
 269 // static
 270 const int TrayBubbleView::InitParams::kArrowDefaultOffset = -1;
 271
 272 TrayBubbleView::InitParams::InitParams(AnchorType anchor_type,
 273                                        AnchorAlignment anchor_alignment,
 274                                        int min_width,
 275                                        int max_width)
 276     : anchor_type(anchor_type),
 277       anchor_alignment(anchor_alignment),
 278       min_width(min_width),
 279       max_width(max_width),
 280       max_height(0),
 281       can_activate(false),
 282       close_on_deactivate(true),
 283       arrow_color(SK_ColorBLACK),
 284       first_item_has_no_margin(false),
 285       arrow(BubbleBorder::NONE),
 286       arrow_offset(kArrowDefaultOffset),
 287       arrow_paint_type(BubbleBorder::PAINT_NORMAL),
 288       shadow(BubbleBorder::BIG_SHADOW),
 289       arrow_alignment(BubbleBorder::ALIGN_EDGE_TO_ANCHOR_EDGE) {
 290 }
 291
 292 // static
 293 TrayBubbleView* TrayBubbleView::Create(gfx::NativeView parent_window,
 294                                        View* anchor,
 295                                        Delegate* delegate,
 296                                        InitParams* init_params) {
 297   // Set arrow here so that it can be passed to the BubbleView constructor.
 298   if (init_params->anchor_type == ANCHOR_TYPE_TRAY) {
 299     if (init_params->anchor_alignment == ANCHOR_ALIGNMENT_BOTTOM) {
 300       init_params->arrow = base::i18n::IsRTL() ?
 301           BubbleBorder::BOTTOM_LEFT : BubbleBorder::BOTTOM_RIGHT;
 302     } else if (init_params->anchor_alignment == ANCHOR_ALIGNMENT_TOP) {
 303       init_params->arrow = BubbleBorder::TOP_LEFT;
 304     } else if (init_params->anchor_alignment == ANCHOR_ALIGNMENT_LEFT) {
 305       init_params->arrow = BubbleBorder::LEFT_BOTTOM;
 306     } else {
 307       init_params->arrow = BubbleBorder::RIGHT_BOTTOM;
 308     }
 309   } else {
 310     init_params->arrow = BubbleBorder::NONE;
 311   }
 312
 313   return new TrayBubbleView(parent_window, anchor, delegate, *init_params);
 314 }
 315
 316 TrayBubbleView::TrayBubbleView(gfx::NativeView parent_window,
 317                                View* anchor,
 318                                Delegate* delegate,
 319                                const InitParams& init_params)
 320     : BubbleDelegateView(anchor, init_params.arrow),
 321       params_(init_params),
 322       delegate_(delegate),
 323       preferred_width_(init_params.min_width),
 324       bubble_border_(NULL),
 325       is_gesture_dragging_(false),
 326       mouse_actively_entered_(false) {
 327   set_parent_window(parent_window);
 328   set_notify_enter_exit_on_child(true);
 329   set_close_on_deactivate(init_params.close_on_deactivate);
 330   set_margins(gfx::Insets());
 331   bubble_border_ = new TrayBubbleBorder(this, GetAnchorView(), params_);
 332   SetPaintToLayer(true);
 333   SetFillsBoundsOpaquely(true);
 334
 335   bubble_content_mask_.reset(
 336       new TrayBubbleContentMask(bubble_border_->GetBorderCornerRadius()));
 337 }
 338
 339 TrayBubbleView::~TrayBubbleView() {
 340   mouse_watcher_.reset();
 341   // Inform host items (models) that their views are being destroyed.
 342   if (delegate_)
 343     delegate_->BubbleViewDestroyed();
 344 }
 345
 346 void TrayBubbleView::InitializeAndShowBubble() {
 347   // Must occur after call to BubbleDelegateView::CreateBubble().
 348   SetAlignment(params_.arrow_alignment);
 349   bubble_border_->UpdateArrowOffset();
 350
 351   layer()->parent()->SetMaskLayer(bubble_content_mask_->layer());
 352
 353   GetWidget()->Show();
 354   GetWidget()->GetNativeWindow()->SetEventTargeter(
 355       scoped_ptr<ui::EventTargeter>(new BubbleWindowTargeter(this)));
 356   UpdateBubble();
 357 }
 358
 359 void TrayBubbleView::UpdateBubble() {
 360   SizeToContents();
 361   bubble_content_mask_->layer()->SetBounds(layer()->bounds());
 362   GetWidget()->GetRootView()->SchedulePaint();
 363 }
 364
 365 void TrayBubbleView::SetMaxHeight(int height) {
 366   params_.max_height = height;
 367   if (GetWidget())
 368     SizeToContents();
 369 }
 370
 371 void TrayBubbleView::SetWidth(int width) {
 372   width = std::max(std::min(width, params_.max_width), params_.min_width);
 373   if (preferred_width_ == width)
 374     return;
 375   preferred_width_ = width;
 376   if (GetWidget())
 377     SizeToContents();
 378 }
 379
 380 void TrayBubbleView::SetArrowPaintType(
 381     views::BubbleBorder::ArrowPaintType paint_type) {
 382   bubble_border_->set_paint_arrow(paint_type);
 383   UpdateBubble();
 384 }
 385
 386 gfx::Insets TrayBubbleView::GetBorderInsets() const {
 387   return bubble_border_->GetInsets();
 388 }
 389
 390 void TrayBubbleView::Init() {
 391   BoxLayout* layout = new BottomAlignedBoxLayout(this);
 392   layout->SetDefaultFlex(1);
 393   SetLayoutManager(layout);
 394 }
 395
 396 gfx::Rect TrayBubbleView::GetAnchorRect() const {
 397   if (!delegate_)
 398     return gfx::Rect();
 399   return delegate_->GetAnchorRect(anchor_widget(),
 400                                   params_.anchor_type,
 401                                   params_.anchor_alignment);
 402 }
 403
 404 bool TrayBubbleView::CanActivate() const {
 405   return params_.can_activate;
 406 }
 407
 408 NonClientFrameView* TrayBubbleView::CreateNonClientFrameView(Widget* widget) {
 409   BubbleFrameView* frame = new BubbleFrameView(margins());
 410   frame->SetBubbleBorder(scoped_ptr<views::BubbleBorder>(bubble_border_));
 411   return frame;
 412 }
 413
 414 bool TrayBubbleView::WidgetHasHitTestMask() const {
 415   return true;
 416 }
 417
 418 void TrayBubbleView::GetWidgetHitTestMask(gfx::Path* mask) const {
 419   DCHECK(mask);
 420   mask->addRect(gfx::RectToSkRect(GetBubbleFrameView()->GetContentsBounds()));
 421 }
 422
 423 gfx::Size TrayBubbleView::GetPreferredSize() const {
 424   return gfx::Size(preferred_width_, GetHeightForWidth(preferred_width_));
 425 }
 426
 427 gfx::Size TrayBubbleView::GetMaximumSize() const {
 428   gfx::Size size = GetPreferredSize();
 429   size.set_width(params_.max_width);
 430   return size;
 431 }
 432
 433 int TrayBubbleView::GetHeightForWidth(int width) const {
 434   int height = GetInsets().height();
 435   width = std::max(width - GetInsets().width(), 0);
 436   for (int i = 0; i < child_count(); ++i) {
 437     const View* child = child_at(i);
 438     if (child->visible())
 439       height += child->GetHeightForWidth(width);
 440   }
 441
 442   return (params_.max_height != 0) ?
 443       std::min(height, params_.max_height) : height;
 444 }
 445
 446 void TrayBubbleView::OnMouseEntered(const ui::MouseEvent& event) {
 447   mouse_watcher_.reset();
 448   if (delegate_ && !(event.flags() & ui::EF_IS_SYNTHESIZED)) {
 449     // Coming here the user was actively moving the mouse over the bubble and
 450     // we inform the delegate that we entered. This will prevent the bubble
 451     // to auto close.
 452     delegate_->OnMouseEnteredView();
 453     mouse_actively_entered_ = true;
 454   } else {
 455     // Coming here the bubble got shown and the mouse was 'accidentally' over it
 456     // which is not a reason to prevent the bubble to auto close. As such we
 457     // do not call the delegate, but wait for the first mouse move within the
 458     // bubble. The used MouseWatcher will notify use of a movement and call
 459     // |MouseMovedOutOfHost|.
 460     mouse_watcher_.reset(new MouseWatcher(
 461         new views::internal::MouseMoveDetectorHost(),
 462         this));
 463     // Set the mouse sampling frequency to roughly a frame time so that the user
 464     // cannot see a lag.
 465     mouse_watcher_->set_notify_on_exit_time(
 466         base::TimeDelta::FromMilliseconds(kFrameTimeInMS));
 467     mouse_watcher_->Start();
 468   }
 469 }
 470
 471 void TrayBubbleView::OnMouseExited(const ui::MouseEvent& event) {
 472   // If there was a mouse watcher waiting for mouse movements we disable it
 473   // immediately since we now leave the bubble.
 474   mouse_watcher_.reset();
 475   // Do not notify the delegate of an exit if we never told it that we entered.
 476   if (delegate_ && mouse_actively_entered_)
 477     delegate_->OnMouseExitedView();
 478 }
 479
 480 void TrayBubbleView::GetAccessibleState(ui::AXViewState* state) {
 481   if (delegate_ && params_.can_activate) {
 482     state->role = ui::AX_ROLE_WINDOW;
 483     state->name = delegate_->GetAccessibleNameForBubble();
 484   }
 485 }
 486
 487 void TrayBubbleView::MouseMovedOutOfHost() {
 488   // The mouse was accidentally over the bubble when it opened and the AutoClose
 489   // logic was not activated. Now that the user did move the mouse we tell the
 490   // delegate to disable AutoClose.
 491   delegate_->OnMouseEnteredView();
 492   mouse_actively_entered_ = true;
 493   mouse_watcher_->Stop();
 494 }
 495
 496 void TrayBubbleView::ChildPreferredSizeChanged(View* child) {
 497   SizeToContents();
 498 }
 499
 500 void TrayBubbleView::ViewHierarchyChanged(
 501     const ViewHierarchyChangedDetails& details) {
 502   if (details.is_add && details.child == this) {
 503     details.parent->SetPaintToLayer(true);
 504     details.parent->SetFillsBoundsOpaquely(true);
 505     details.parent->layer()->SetMasksToBounds(true);
 506   }
 507 }
 508
 509 }  // namespace views