1 // Copyright 2017 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 "ash/wm/splitview/split_view_drag_indicators.h"
6
7 #include <utility>
8
9 #include "ash/display/screen_orientation_controller.h"
10 #include "ash/public/cpp/shell_window_ids.h"
11 #include "ash/public/cpp/window_animation_types.h"
12 #include "ash/screen_util.h"
13 #include "ash/shelf/shelf.h"
14 #include "ash/shell.h"
15 #include "ash/strings/grit/ash_strings.h"
16 #include "ash/style/ash_color_provider.h"
17 #include "ash/style/default_color_constants.h"
18 #include "ash/style/default_colors.h"
19 #include "ash/wm/splitview/split_view_constants.h"
20 #include "ash/wm/splitview/split_view_highlight_view.h"
21 #include "ash/wm/splitview/split_view_utils.h"
22 #include "ash/wm/window_animations.h"
23 #include "ash/wm/window_util.h"
24 #include "base/i18n/rtl.h"
25 #include "base/strings/utf_string_conversions.h"
26 #include "ui/aura/window.h"
27 #include "ui/aura/window_observer.h"
28 #include "ui/base/l10n/l10n_util.h"
29 #include "ui/compositor/scoped_layer_animation_settings.h"
30 #include "ui/display/display_observer.h"
31 #include "ui/views/background.h"
32 #include "ui/views/controls/label.h"
33 #include "ui/views/layout/box_layout.h"
34 #include "ui/views/view.h"
35 #include "ui/views/widget/widget.h"
36 #include "ui/wm/core/coordinate_conversion.h"
37 #include "ui/wm/core/window_animations.h"
38
39 namespace ash {
40
41 namespace {
42
43 // When a preview is shown, the opposite highlight shall contract to this ratio
44 // of the screen length.
45 constexpr float kOtherHighlightScreenPrimaryAxisRatio = 0.03f;
46
47 // Creates the widget responsible for displaying the indicators.
CreateWidget(aura::Window * root_window)48 std::unique_ptr<views::Widget> CreateWidget(aura::Window* root_window) {
49 auto widget = std::make_unique<views::Widget>();
50 views::Widget::InitParams params;
51 params.type = views::Widget::InitParams::TYPE_POPUP;
52 params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET;
53 params.opacity = views::Widget::InitParams::WindowOpacity::kTranslucent;
54 params.accept_events = false;
55 params.layer_type = ui::LAYER_NOT_DRAWN;
56 params.parent =
57 Shell::GetContainer(root_window, kShellWindowId_OverlayContainer);
58 widget->set_focus_on_creation(false);
59 widget->Init(std::move(params));
60 return widget;
61 }
62
63 // Computes the transform which rotates the labels |angle| degrees. The point
64 // of rotation is the relative center point of |bounds|.
ComputeRotateAroundCenterTransform(const gfx::Rect & bounds,double angle)65 gfx::Transform ComputeRotateAroundCenterTransform(const gfx::Rect& bounds,
66 double angle) {
67 gfx::Transform transform;
68 const gfx::Vector2dF center_point_vector =
69 bounds.CenterPoint() - bounds.origin();
70 transform.Translate(center_point_vector);
71 transform.Rotate(angle);
72 transform.Translate(-center_point_vector);
73 return transform;
74 }
75
76 // Returns the work area bounds that has no overlap with shelf.
GetWorkAreaBoundsNoOverlapWithShelf(aura::Window * root_window)77 gfx::Rect GetWorkAreaBoundsNoOverlapWithShelf(aura::Window* root_window) {
78 aura::Window* window =
79 root_window->GetChildById(kShellWindowId_OverlayContainer);
80 gfx::Rect bounds = screen_util::GetDisplayWorkAreaBoundsInParent(window);
81 ::wm::ConvertRectToScreen(root_window, &bounds);
82
83 bounds.Subtract(Shelf::ForWindow(root_window)->GetIdealBounds());
84 return bounds;
85 }
86
87 } // namespace
88
89 // static
GetSnapPosition(WindowDraggingState window_dragging_state)90 SplitViewController::SnapPosition SplitViewDragIndicators::GetSnapPosition(
91 WindowDraggingState window_dragging_state) {
92 switch (window_dragging_state) {
93 case WindowDraggingState::kToSnapLeft:
94 return SplitViewController::LEFT;
95 case WindowDraggingState::kToSnapRight:
96 return SplitViewController::RIGHT;
97 default:
98 return SplitViewController::NONE;
99 }
100 }
101
102 // static
103 SplitViewDragIndicators::WindowDraggingState
ComputeWindowDraggingState(bool is_dragging,WindowDraggingState non_snap_state,SplitViewController::SnapPosition snap_position)104 SplitViewDragIndicators::ComputeWindowDraggingState(
105 bool is_dragging,
106 WindowDraggingState non_snap_state,
107 SplitViewController::SnapPosition snap_position) {
108 if (!is_dragging || !ShouldAllowSplitView())
109 return WindowDraggingState::kNoDrag;
110 switch (snap_position) {
111 case SplitViewController::NONE:
112 return non_snap_state;
113 case SplitViewController::LEFT:
114 return WindowDraggingState::kToSnapLeft;
115 case SplitViewController::RIGHT:
116 return WindowDraggingState::kToSnapRight;
117 }
118 }
119
120 // View which contains a label and can be rotated. Used by and rotated by
121 // SplitViewDragIndicatorsView.
122 class SplitViewDragIndicators::RotatedImageLabelView : public views::View {
123 public:
RotatedImageLabelView(bool is_right_or_bottom)124 explicit RotatedImageLabelView(bool is_right_or_bottom)
125 : is_right_or_bottom_(is_right_or_bottom) {
126 // TODO(sammiequon): Remove this extra intermediate layer.
127 SetPaintToLayer(ui::LAYER_NOT_DRAWN);
128 layer()->SetFillsBoundsOpaquely(false);
129
130 // Use |label_parent_| to add padding and rounded edges to the text. Create
131 // this extra view so that we can rotate the label, while having a slide
132 // animation at times on the whole thing.
133 label_parent_ = AddChildView(std::make_unique<views::View>());
134 label_parent_->SetPaintToLayer();
135 label_parent_->layer()->SetFillsBoundsOpaquely(false);
136 label_parent_->SetBackground(views::CreateRoundedRectBackground(
137 DeprecatedGetBaseLayerColor(
138 AshColorProvider::BaseLayerType::kTransparent80,
139 kSplitviewLabelBackgroundColor),
140 kSplitviewLabelRoundRectRadiusDp));
141 label_parent_->SetLayoutManager(std::make_unique<views::BoxLayout>(
142 views::BoxLayout::Orientation::kVertical,
143 gfx::Insets(kSplitviewLabelVerticalInsetDp,
144 kSplitviewLabelHorizontalInsetDp)));
145
146 label_ = label_parent_->AddChildView(std::make_unique<views::Label>(
147 base::string16(), views::style::CONTEXT_LABEL));
148 label_->SetEnabledColor(DeprecatedGetContentLayerColor(
149 AshColorProvider::ContentLayerType::kTextColorPrimary,
150 kSplitviewLabelEnabledColor));
151 label_->SetBackgroundColor(DeprecatedGetBaseLayerColor(
152 AshColorProvider::BaseLayerType::kTransparent80,
153 kSplitviewLabelBackgroundColor));
154 }
155
156 ~RotatedImageLabelView() override = default;
157
SetLabelText(const base::string16 & text)158 void SetLabelText(const base::string16& text) { label_->SetText(text); }
159
160 // Called when the view's bounds are altered. Rotates the view by |angle|
161 // degrees.
OnBoundsUpdated(const gfx::Rect & bounds,double angle)162 void OnBoundsUpdated(const gfx::Rect& bounds, double angle) {
163 SetBoundsRect(bounds);
164 label_parent_->SetBoundsRect(gfx::Rect(bounds.size()));
165 label_parent_->SetTransform(
166 ComputeRotateAroundCenterTransform(bounds, angle));
167 }
168
169 // Called to update the opacity of the labels view on |indicator_state|.
OnWindowDraggingStateChanged(WindowDraggingState window_dragging_state,WindowDraggingState previous_window_dragging_state,bool can_dragged_window_be_snapped)170 void OnWindowDraggingStateChanged(
171 WindowDraggingState window_dragging_state,
172 WindowDraggingState previous_window_dragging_state,
173 bool can_dragged_window_be_snapped) {
174 // No top label for dragging from the top in portrait orientation.
175 if (window_dragging_state == WindowDraggingState::kFromTop &&
176 !IsCurrentScreenOrientationLandscape() && !is_right_or_bottom_) {
177 return;
178 }
179
180 // If there is no drag currently in this display, any label that is showing
181 // shall fade out with the corresponding indicator.
182 if (window_dragging_state == WindowDraggingState::kNoDrag ||
183 window_dragging_state == WindowDraggingState::kOtherDisplay) {
184 DoSplitviewOpacityAnimation(
185 layer(), SPLITVIEW_ANIMATION_TEXT_FADE_OUT_WITH_HIGHLIGHT);
186 return;
187 }
188
189 // When a snap preview is shown, any label that is showing shall fade out.
190 if (GetSnapPosition(window_dragging_state) != SplitViewController::NONE) {
191 DoSplitviewOpacityAnimation(layer(), SPLITVIEW_ANIMATION_TEXT_FADE_OUT);
192 return;
193 }
194
195 // Set the text according to |can_dragged_window_be_snapped|.
196 SetLabelText(l10n_util::GetStringUTF16(
197 can_dragged_window_be_snapped ? IDS_ASH_SPLIT_VIEW_GUIDANCE
198 : IDS_ASH_SPLIT_VIEW_CANNOT_SNAP));
199
200 // When dragging begins in this display or comes in from another display, if
201 // there is now no snap preview, fade in with an indicator.
202 if (previous_window_dragging_state == WindowDraggingState::kNoDrag ||
203 previous_window_dragging_state == WindowDraggingState::kOtherDisplay) {
204 DoSplitviewOpacityAnimation(
205 layer(), SPLITVIEW_ANIMATION_TEXT_FADE_IN_WITH_HIGHLIGHT);
206 return;
207 }
208
209 // If a snap preview was shown, the labels shall now fade in.
210 if (GetSnapPosition(previous_window_dragging_state) !=
211 SplitViewController::NONE) {
212 DoSplitviewOpacityAnimation(layer(), SPLITVIEW_ANIMATION_TEXT_FADE_IN);
213 return;
214 }
215 }
216
217 protected:
CalculatePreferredSize() const218 gfx::Size CalculatePreferredSize() const override {
219 return label_parent_->GetPreferredSize();
220 }
221
222 private:
223 // True if the label view is the right/bottom side one, false if it is the
224 // left/top one.
225 const bool is_right_or_bottom_;
226
227 views::View* label_parent_ = nullptr;
228 views::Label* label_ = nullptr;
229
230 DISALLOW_COPY_AND_ASSIGN(RotatedImageLabelView);
231 };
232
233 // View which contains two highlights on each side indicator where a user should
234 // drag a selected window in order to initiate splitview. Each highlight has a
235 // label with instructions to further guide users. The highlights are on the
236 // left and right of the display in landscape mode, and on the top and bottom of
237 // the display in landscape mode. The highlights can expand and shrink if a
238 // window has entered a snap region to display the bounds of the window, if it
239 // were to get snapped.
240 class SplitViewDragIndicators::SplitViewDragIndicatorsView
241 : public views::View,
242 public aura::WindowObserver {
243 public:
SplitViewDragIndicatorsView()244 SplitViewDragIndicatorsView() {
245 left_highlight_view_ = AddChildView(
246 std::make_unique<SplitViewHighlightView>(/*is_right_or_bottom=*/false));
247 right_highlight_view_ = AddChildView(
248 std::make_unique<SplitViewHighlightView>(/*is_right_or_bottom=*/true));
249
250 left_rotated_view_ = AddChildView(
251 std::make_unique<RotatedImageLabelView>(/*is_right_or_bottom=*/false));
252 right_rotated_view_ = AddChildView(
253 std::make_unique<RotatedImageLabelView>(/*is_right_or_bottom=*/true));
254
255 // Nothing is shown initially.
256 left_highlight_view_->layer()->SetOpacity(0.f);
257 right_highlight_view_->layer()->SetOpacity(0.f);
258 left_rotated_view_->layer()->SetOpacity(0.f);
259 right_rotated_view_->layer()->SetOpacity(0.f);
260 }
261
~SplitViewDragIndicatorsView()262 ~SplitViewDragIndicatorsView() override {
263 if (dragged_window_)
264 dragged_window_->RemoveObserver(this);
265 }
266
left_highlight_view()267 SplitViewHighlightView* left_highlight_view() { return left_highlight_view_; }
268
269 // Called by parent widget when the state machine changes. Handles setting the
270 // opacity and bounds of the highlights and labels.
OnWindowDraggingStateChanged(WindowDraggingState window_dragging_state)271 void OnWindowDraggingStateChanged(WindowDraggingState window_dragging_state) {
272 DCHECK_NE(window_dragging_state_, window_dragging_state);
273 previous_window_dragging_state_ = window_dragging_state_;
274 window_dragging_state_ = window_dragging_state;
275
276 SplitViewController* split_view_controller =
277 SplitViewController::Get(GetWidget()->GetNativeWindow());
278 const bool previews_only =
279 window_dragging_state == WindowDraggingState::kFromShelf ||
280 window_dragging_state == WindowDraggingState::kFromTop ||
281 split_view_controller->InSplitViewMode();
282 const bool can_dragged_window_be_snapped =
283 dragged_window_ &&
284 split_view_controller->CanSnapWindow(dragged_window_);
285 if (!previews_only) {
286 left_rotated_view_->OnWindowDraggingStateChanged(
287 window_dragging_state, previous_window_dragging_state_,
288 can_dragged_window_be_snapped);
289 right_rotated_view_->OnWindowDraggingStateChanged(
290 window_dragging_state, previous_window_dragging_state_,
291 can_dragged_window_be_snapped);
292 }
293 left_highlight_view_->OnWindowDraggingStateChanged(
294 window_dragging_state, previous_window_dragging_state_, previews_only,
295 can_dragged_window_be_snapped);
296 right_highlight_view_->OnWindowDraggingStateChanged(
297 window_dragging_state, previous_window_dragging_state_, previews_only,
298 can_dragged_window_be_snapped);
299
300 if (window_dragging_state != WindowDraggingState::kNoDrag ||
301 GetSnapPosition(previous_window_dragging_state_) !=
302 SplitViewController::NONE) {
303 Layout(previous_window_dragging_state_ != WindowDraggingState::kNoDrag);
304 }
305 }
306
GetViewForIndicatorType(IndicatorType type)307 views::View* GetViewForIndicatorType(IndicatorType type) {
308 switch (type) {
309 case IndicatorType::kLeftHighlight:
310 return left_highlight_view_;
311 case IndicatorType::kLeftText:
312 return left_rotated_view_;
313 case IndicatorType::kRightHighlight:
314 return right_highlight_view_;
315 case IndicatorType::kRightText:
316 return right_rotated_view_;
317 }
318
319 NOTREACHED();
320 return nullptr;
321 }
322
SetDraggedWindow(aura::Window * dragged_window)323 void SetDraggedWindow(aura::Window* dragged_window) {
324 if (dragged_window_)
325 dragged_window_->RemoveObserver(this);
326 dragged_window_ = dragged_window;
327 if (dragged_window)
328 dragged_window->AddObserver(this);
329 }
330
331 // views::View:
Layout()332 void Layout() override { Layout(/*animate=*/false); }
333
334 // aura::WindowObserver:
OnWindowDestroyed(aura::Window * window)335 void OnWindowDestroyed(aura::Window* window) override {
336 DCHECK_EQ(dragged_window_, window);
337 dragged_window_ = nullptr;
338 }
339
340 private:
341 // Layout the bounds of the highlight views and helper labels. One should
342 // animate when changing states, but not when bounds or orientation is
343 // changed.
Layout(bool animate)344 void Layout(bool animate) {
345 // TODO(xdai|afakhry): Attempt to simplify this logic.
346 const bool horizontal = SplitViewController::IsLayoutHorizontal();
347 const int display_width = horizontal ? width() : height();
348 const int display_height = horizontal ? height() : width();
349
350 // Calculate the bounds of the two highlight regions.
351 const int highlight_width =
352 display_width * kHighlightScreenPrimaryAxisRatio;
353 const int highlight_height =
354 display_height - 2 * kHighlightScreenEdgePaddingDp;
355 gfx::Size highlight_size(highlight_width, highlight_height);
356
357 // When one highlight expands to become a preview area, the other highlight
358 // contracts to this width.
359 const int other_highlight_width =
360 display_width * kOtherHighlightScreenPrimaryAxisRatio;
361
362 // The origin of the right highlight view in horizontal split view layout,
363 // or the bottom highlight view in vertical split view layout.
364 gfx::Point right_bottom_origin(
365 display_width - highlight_width - kHighlightScreenEdgePaddingDp,
366 kHighlightScreenEdgePaddingDp);
367
368 const gfx::Point highlight_padding_point(kHighlightScreenEdgePaddingDp,
369 kHighlightScreenEdgePaddingDp);
370 gfx::Rect left_highlight_bounds(highlight_padding_point, highlight_size);
371 gfx::Rect right_highlight_bounds(right_bottom_origin, highlight_size);
372 if (!horizontal) {
373 left_highlight_bounds.Transpose();
374 right_highlight_bounds.Transpose();
375 }
376
377 // True when the drag ends in a snap area, meaning that the dragged window
378 // actually becomes snapped.
379 const bool drag_ending_in_snap =
380 window_dragging_state_ == WindowDraggingState::kNoDrag &&
381 GetSnapPosition(previous_window_dragging_state_) !=
382 SplitViewController::NONE;
383
384 SplitViewController::SnapPosition snap_position =
385 GetSnapPosition(window_dragging_state_);
386 if (snap_position == SplitViewController::NONE)
387 snap_position = GetSnapPosition(previous_window_dragging_state_);
388
389 gfx::Rect preview_area_bounds;
390 base::Optional<SplitviewAnimationType> left_highlight_animation_type;
391 base::Optional<SplitviewAnimationType> right_highlight_animation_type;
392 if (GetSnapPosition(window_dragging_state_) != SplitViewController::NONE ||
393 drag_ending_in_snap) {
394 // Get the preview area bounds from the split view controller.
395 preview_area_bounds =
396 SplitViewController::Get(GetWidget()->GetNativeWindow())
397 ->GetSnappedWindowBoundsInScreen(snap_position, dragged_window_);
398
399 aura::Window* root_window =
400 GetWidget()->GetNativeWindow()->GetRootWindow();
401 wm::ConvertRectFromScreen(root_window, &preview_area_bounds);
402
403 // Preview area should have no overlap with the shelf.
404 preview_area_bounds.Subtract(
405 Shelf::ForWindow(root_window)->GetIdealBounds());
406
407 gfx::Rect work_area_bounds =
408 GetWorkAreaBoundsNoOverlapWithShelf(root_window);
409 wm::ConvertRectFromScreen(root_window, &work_area_bounds);
410 preview_area_bounds.set_y(preview_area_bounds.y() - work_area_bounds.y());
411 if (!drag_ending_in_snap) {
412 preview_area_bounds.Inset(kHighlightScreenEdgePaddingDp,
413 kHighlightScreenEdgePaddingDp);
414 }
415
416 // Calculate the bounds of the other highlight, which is the one that
417 // shrinks and fades away, while the other one, the preview area, expands
418 // and takes up half the screen.
419 gfx::Rect other_bounds(
420 display_width - other_highlight_width - kHighlightScreenEdgePaddingDp,
421 kHighlightScreenEdgePaddingDp, other_highlight_width,
422 display_height - 2 * kHighlightScreenEdgePaddingDp);
423 if (!horizontal)
424 other_bounds.Transpose();
425
426 if (SplitViewController::IsPhysicalLeftOrTop(snap_position)) {
427 left_highlight_bounds = preview_area_bounds;
428 right_highlight_bounds = other_bounds;
429 if (animate) {
430 if (drag_ending_in_snap) {
431 left_highlight_animation_type =
432 SPLITVIEW_ANIMATION_PREVIEW_AREA_NIX_INSET;
433 } else {
434 left_highlight_animation_type =
435 SPLITVIEW_ANIMATION_PREVIEW_AREA_SLIDE_IN;
436 right_highlight_animation_type =
437 SPLITVIEW_ANIMATION_OTHER_HIGHLIGHT_SLIDE_OUT;
438 }
439 }
440 } else {
441 other_bounds.set_origin(highlight_padding_point);
442 left_highlight_bounds = other_bounds;
443 right_highlight_bounds = preview_area_bounds;
444 if (animate) {
445 if (drag_ending_in_snap) {
446 right_highlight_animation_type =
447 SPLITVIEW_ANIMATION_PREVIEW_AREA_NIX_INSET;
448 } else {
449 left_highlight_animation_type =
450 SPLITVIEW_ANIMATION_OTHER_HIGHLIGHT_SLIDE_OUT;
451 right_highlight_animation_type =
452 SPLITVIEW_ANIMATION_PREVIEW_AREA_SLIDE_IN;
453 }
454 }
455 }
456 } else if (GetSnapPosition(previous_window_dragging_state_) !=
457 SplitViewController::NONE &&
458 animate) {
459 if (SplitViewController::IsPhysicalLeftOrTop(snap_position)) {
460 left_highlight_animation_type =
461 SPLITVIEW_ANIMATION_PREVIEW_AREA_SLIDE_OUT;
462 right_highlight_animation_type =
463 SPLITVIEW_ANIMATION_OTHER_HIGHLIGHT_SLIDE_IN;
464 } else {
465 left_highlight_animation_type =
466 SPLITVIEW_ANIMATION_OTHER_HIGHLIGHT_SLIDE_IN;
467 right_highlight_animation_type =
468 SPLITVIEW_ANIMATION_PREVIEW_AREA_SLIDE_OUT;
469 }
470 }
471
472 left_highlight_view_->SetBounds(GetMirroredRect(left_highlight_bounds),
473 left_highlight_animation_type);
474 right_highlight_view_->SetBounds(GetMirroredRect(right_highlight_bounds),
475 right_highlight_animation_type);
476
477 // Calculate the bounds of the views which contain the guidance text and
478 // icon. Rotate the two views in horizontal split view layout.
479 const gfx::Size size(right_rotated_view_->GetPreferredSize().width(),
480 kSplitviewLabelPreferredHeightDp);
481 if (!horizontal)
482 highlight_size.SetSize(highlight_size.height(), highlight_size.width());
483 gfx::Rect left_rotated_bounds(
484 highlight_size.width() / 2 - size.width() / 2,
485 highlight_size.height() / 2 - size.height() / 2, size.width(),
486 size.height());
487 gfx::Rect right_rotated_bounds = left_rotated_bounds;
488 left_rotated_bounds.Offset(highlight_padding_point.x(),
489 highlight_padding_point.y());
490 if (!horizontal) {
491 right_bottom_origin.SetPoint(right_bottom_origin.y(),
492 right_bottom_origin.x());
493 }
494 right_rotated_bounds.Offset(right_bottom_origin.x(),
495 right_bottom_origin.y());
496
497 // In portrait mode, there is no need to rotate the text and warning icon.
498 // In horizontal split view layout, rotate the left text 90 degrees
499 // clockwise in rtl and 90 degress anti clockwise in ltr. The right text is
500 // rotated 90 degrees in the opposite direction of the left text.
501 double left_rotation_angle = 0.0;
502 if (horizontal)
503 left_rotation_angle = 90.0 * (base::i18n::IsRTL() ? 1 : -1);
504
505 left_rotated_view_->OnBoundsUpdated(left_rotated_bounds,
506 /*angle=*/left_rotation_angle);
507 right_rotated_view_->OnBoundsUpdated(right_rotated_bounds,
508 /*angle=*/-left_rotation_angle);
509
510 if (drag_ending_in_snap) {
511 // Reset the label transforms, in preparation for the next drag (if any).
512 left_rotated_view_->layer()->SetTransform(gfx::Transform());
513 right_rotated_view_->layer()->SetTransform(gfx::Transform());
514 return;
515 }
516
517 ui::Layer* preview_label_layer;
518 ui::Layer* other_highlight_label_layer;
519 if (snap_position == SplitViewController::NONE) {
520 preview_label_layer = nullptr;
521 other_highlight_label_layer = nullptr;
522 } else if (SplitViewController::IsPhysicalLeftOrTop(snap_position)) {
523 preview_label_layer = left_rotated_view_->layer();
524 other_highlight_label_layer = right_rotated_view_->layer();
525 } else {
526 preview_label_layer = right_rotated_view_->layer();
527 other_highlight_label_layer = left_rotated_view_->layer();
528 }
529
530 // Slide out the labels when a snap preview appears. This code also adjusts
531 // the label transforms for things like display rotation while there is a
532 // snap preview.
533 if (GetSnapPosition(window_dragging_state_) != SplitViewController::NONE) {
534 // How far each label shall slide to stay centered in the corresponding
535 // highlight as it expands/contracts. Include distance traveled with zero
536 // opacity (whence a label still slides, not only for simplicity in
537 // calculating the values below, but also to facilitate that the label
538 // transform and the highlight transform have matching easing).
539 const float preview_label_distance =
540 0.5f * (preview_area_bounds.width() - highlight_width);
541 const float other_highlight_label_distance =
542 0.5f * (highlight_width - other_highlight_width);
543
544 // Positive for right or down; negative for left or up.
545 float preview_label_delta, other_highlight_label_delta;
546 if (SplitViewController::IsPhysicalLeftOrTop(snap_position)) {
547 preview_label_delta = preview_label_distance;
548 other_highlight_label_delta = other_highlight_label_distance;
549 } else {
550 preview_label_delta = -preview_label_distance;
551 other_highlight_label_delta = -other_highlight_label_distance;
552 }
553
554 // x-axis if |horizontal|; else y-axis.
555 gfx::Transform preview_label_transform, other_highlight_label_transform;
556 if (horizontal) {
557 preview_label_transform.Translate(preview_label_delta, 0.f);
558 other_highlight_label_transform.Translate(other_highlight_label_delta,
559 0.f);
560 } else {
561 preview_label_transform.Translate(0.f, preview_label_delta);
562 other_highlight_label_transform.Translate(0.f,
563 other_highlight_label_delta);
564 }
565
566 if (animate) {
567 // Animate the labels sliding out.
568 DoSplitviewTransformAnimation(
569 preview_label_layer,
570 SPLITVIEW_ANIMATION_PREVIEW_AREA_TEXT_SLIDE_OUT,
571 preview_label_transform, /*animation_observer=*/nullptr);
572 DoSplitviewTransformAnimation(
573 other_highlight_label_layer,
574 SPLITVIEW_ANIMATION_OTHER_HIGHLIGHT_TEXT_SLIDE_OUT,
575 other_highlight_label_transform, /*animation_observer=*/nullptr);
576 } else {
577 // Put the labels where they belong.
578 preview_label_layer->SetTransform(preview_label_transform);
579 other_highlight_label_layer->SetTransform(
580 other_highlight_label_transform);
581 }
582 return;
583 }
584
585 // Slide in the labels when a snap preview disappears because you drag
586 // inward. (Having reached this code, we know that the window is not
587 // becoming snapped, because that case is handled earlier and we bail out.)
588 if (GetSnapPosition(previous_window_dragging_state_) !=
589 SplitViewController::NONE) {
590 if (animate) {
591 // Animate the labels sliding in.
592 DoSplitviewTransformAnimation(
593 preview_label_layer, SPLITVIEW_ANIMATION_PREVIEW_AREA_TEXT_SLIDE_IN,
594 gfx::Transform(), /*animation_observer=*/nullptr);
595 DoSplitviewTransformAnimation(
596 other_highlight_label_layer,
597 SPLITVIEW_ANIMATION_OTHER_HIGHLIGHT_TEXT_SLIDE_IN, gfx::Transform(),
598 /*animation_observer=*/nullptr);
599 } else {
600 // Put the labels where they belong.
601 preview_label_layer->SetTransform(gfx::Transform());
602 other_highlight_label_layer->SetTransform(gfx::Transform());
603 }
604 return;
605 }
606 }
607
608 SplitViewHighlightView* left_highlight_view_ = nullptr;
609 SplitViewHighlightView* right_highlight_view_ = nullptr;
610 RotatedImageLabelView* left_rotated_view_ = nullptr;
611 RotatedImageLabelView* right_rotated_view_ = nullptr;
612
613 WindowDraggingState window_dragging_state_ = WindowDraggingState::kNoDrag;
614 WindowDraggingState previous_window_dragging_state_ =
615 WindowDraggingState::kNoDrag;
616
617 aura::Window* dragged_window_ = nullptr;
618
619 DISALLOW_COPY_AND_ASSIGN(SplitViewDragIndicatorsView);
620 };
621
SplitViewDragIndicators(aura::Window * root_window)622 SplitViewDragIndicators::SplitViewDragIndicators(aura::Window* root_window) {
623 widget_ = CreateWidget(root_window);
624 widget_->SetBounds(GetWorkAreaBoundsNoOverlapWithShelf(root_window));
625 indicators_view_ =
626 widget_->SetContentsView(std::make_unique<SplitViewDragIndicatorsView>());
627 widget_->Show();
628 }
629
~SplitViewDragIndicators()630 SplitViewDragIndicators::~SplitViewDragIndicators() {
631 // Allow some extra time for animations to finish.
632 aura::Window* window = widget_->GetNativeWindow();
633 if (window == nullptr)
634 return;
635 wm::SetWindowVisibilityAnimationType(
636 window, WINDOW_VISIBILITY_ANIMATION_TYPE_STEP_END);
637 AnimateOnChildWindowVisibilityChanged(window, /*visible=*/false);
638 }
639
SetDraggedWindow(aura::Window * dragged_window)640 void SplitViewDragIndicators::SetDraggedWindow(aura::Window* dragged_window) {
641 DCHECK_EQ(WindowDraggingState::kNoDrag, current_window_dragging_state_);
642 indicators_view_->SetDraggedWindow(dragged_window);
643 }
644
SetWindowDraggingState(WindowDraggingState window_dragging_state)645 void SplitViewDragIndicators::SetWindowDraggingState(
646 WindowDraggingState window_dragging_state) {
647 if (window_dragging_state == current_window_dragging_state_)
648 return;
649 current_window_dragging_state_ = window_dragging_state;
650 indicators_view_->OnWindowDraggingStateChanged(window_dragging_state);
651 }
652
OnDisplayBoundsChanged()653 void SplitViewDragIndicators::OnDisplayBoundsChanged() {
654 aura::Window* root_window = widget_->GetNativeView()->GetRootWindow();
655 widget_->SetBounds(GetWorkAreaBoundsNoOverlapWithShelf(root_window));
656 }
657
GetIndicatorTypeVisibilityForTesting(IndicatorType type) const658 bool SplitViewDragIndicators::GetIndicatorTypeVisibilityForTesting(
659 IndicatorType type) const {
660 return indicators_view_->GetViewForIndicatorType(type)->layer()->opacity() >
661 0.f;
662 }
663
GetLeftHighlightViewBounds() const664 gfx::Rect SplitViewDragIndicators::GetLeftHighlightViewBounds() const {
665 return indicators_view_->left_highlight_view()->bounds();
666 }
667
668 } // namespace ash
669