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| 1 // Copyright 2014 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/overview/window_grid.h" | |
| 6 | |
| 7 #include <algorithm> | |
| 8 #include <functional> | |
| 9 #include <set> | |
| 10 #include <utility> | |
| 11 #include <vector> | |
| 12 | |
| 13 #include "ash/common/ash_switches.h" | |
| 14 #include "ash/common/material_design/material_design_controller.h" | |
| 15 #include "ash/common/shell_window_ids.h" | |
| 16 #include "ash/common/wm/window_state.h" | |
| 17 #include "ash/common/wm/wm_screen_util.h" | |
| 18 #include "ash/common/wm_lookup.h" | |
| 19 #include "ash/common/wm_root_window_controller.h" | |
| 20 #include "ash/common/wm_window.h" | |
| 21 #include "ash/wm/overview/scoped_transform_overview_window.h" | |
| 22 #include "ash/wm/overview/window_selector.h" | |
| 23 #include "ash/wm/overview/window_selector_item.h" | |
| 24 #include "base/command_line.h" | |
| 25 #include "base/i18n/string_search.h" | |
| 26 #include "base/memory/scoped_vector.h" | |
| 27 #include "third_party/skia/include/core/SkColor.h" | |
| 28 #include "third_party/skia/include/pathops/SkPathOps.h" | |
| 29 #include "ui/compositor/layer_animation_observer.h" | |
| 30 #include "ui/compositor/scoped_layer_animation_settings.h" | |
| 31 #include "ui/gfx/animation/tween.h" | |
| 32 #include "ui/gfx/canvas.h" | |
| 33 #include "ui/gfx/geometry/safe_integer_conversions.h" | |
| 34 #include "ui/gfx/geometry/vector2d.h" | |
| 35 #include "ui/gfx/scoped_canvas.h" | |
| 36 #include "ui/views/background.h" | |
| 37 #include "ui/views/border.h" | |
| 38 #include "ui/views/painter.h" | |
| 39 #include "ui/views/view.h" | |
| 40 #include "ui/views/widget/widget.h" | |
| 41 #include "ui/wm/core/window_animations.h" | |
| 42 | |
| 43 namespace ash { | |
| 44 namespace { | |
| 45 | |
| 46 using Windows = std::vector<WmWindow*>; | |
| 47 | |
| 48 // An observer which holds onto the passed widget until the animation is | |
| 49 // complete. | |
| 50 class CleanupWidgetAfterAnimationObserver | |
| 51 : public ui::ImplicitAnimationObserver { | |
| 52 public: | |
| 53 explicit CleanupWidgetAfterAnimationObserver( | |
| 54 std::unique_ptr<views::Widget> widget); | |
| 55 ~CleanupWidgetAfterAnimationObserver() override; | |
| 56 | |
| 57 // ui::ImplicitAnimationObserver: | |
| 58 void OnImplicitAnimationsCompleted() override; | |
| 59 | |
| 60 private: | |
| 61 std::unique_ptr<views::Widget> widget_; | |
| 62 | |
| 63 DISALLOW_COPY_AND_ASSIGN(CleanupWidgetAfterAnimationObserver); | |
| 64 }; | |
| 65 | |
| 66 CleanupWidgetAfterAnimationObserver::CleanupWidgetAfterAnimationObserver( | |
| 67 std::unique_ptr<views::Widget> widget) | |
| 68 : widget_(std::move(widget)) {} | |
| 69 | |
| 70 CleanupWidgetAfterAnimationObserver::~CleanupWidgetAfterAnimationObserver() { | |
| 71 } | |
| 72 | |
| 73 void CleanupWidgetAfterAnimationObserver::OnImplicitAnimationsCompleted() { | |
| 74 delete this; | |
| 75 } | |
| 76 | |
| 77 // A comparator for locating a given target window. | |
| 78 struct WindowSelectorItemComparator { | |
| 79 explicit WindowSelectorItemComparator(const WmWindow* target_window) | |
| 80 : target(target_window) {} | |
| 81 | |
| 82 bool operator()(WindowSelectorItem* window) const { | |
| 83 return window->GetWindow() == target; | |
| 84 } | |
| 85 | |
| 86 const WmWindow* target; | |
| 87 }; | |
| 88 | |
| 89 // Conceptually the window overview is a table or grid of cells having this | |
| 90 // fixed aspect ratio. The number of columns is determined by maximizing the | |
| 91 // area of them based on the number of window_list. | |
| 92 const float kCardAspectRatio = 4.0f / 3.0f; | |
| 93 | |
| 94 // The minimum number of cards along the major axis (i.e. horizontally on a | |
| 95 // landscape orientation). | |
| 96 const int kMinCardsMajor = 3; | |
| 97 | |
| 98 const int kOverviewSelectorTransitionMilliseconds = 200; | |
| 99 | |
| 100 // The color and opacity of the screen shield in overview. | |
| 101 const SkColor kShieldColor = SkColorSetARGB(178, 0, 0, 0); | |
| 102 | |
| 103 // The color and opacity of the overview selector. | |
| 104 const SkColor kWindowSelectionColor = SkColorSetARGB(128, 0, 0, 0); | |
| 105 const SkColor kWindowSelectionColorMD = SkColorSetARGB(51, 255, 255, 255); | |
| 106 const SkColor kWindowSelectionBorderColor = SkColorSetARGB(38, 255, 255, 255); | |
| 107 const SkColor kWindowSelectionBorderColorMD = SkColorSetARGB(76, 255, 255, 255); | |
| 108 | |
| 109 // Border thickness of overview selector. | |
| 110 const int kWindowSelectionBorderThickness = 2; | |
| 111 const int kWindowSelectionBorderThicknessMD = 1; | |
| 112 | |
| 113 // Corner radius of the overview selector border. | |
| 114 const int kWindowSelectionRadius = 0; | |
| 115 const int kWindowSelectionRadiusMD = 3; | |
| 116 | |
| 117 // The minimum amount of spacing between the bottom of the text filtering | |
| 118 // text field and the top of the selection widget on the first row of items. | |
| 119 const int kTextFilterBottomMargin = 5; | |
| 120 | |
| 121 // In the conceptual overview table, the window margin is the space reserved | |
| 122 // around the window within the cell. This margin does not overlap so the | |
| 123 // closest distance between adjacent windows will be twice this amount. | |
| 124 const int kWindowMarginMD = 5; | |
| 125 | |
| 126 // Additional inset of overview selector (4 is the visible selector thickness). | |
| 127 const int kSelectionInset = kWindowMarginMD - 5; | |
| 128 | |
| 129 // Windows are not allowed to get taller than this. | |
| 130 const int kMaxHeight = 512; | |
| 131 | |
| 132 // Margins reserved in the overview mode. | |
| 133 const float kOverviewInsetRatio = 0.05f; | |
| 134 | |
| 135 // Additional vertical inset reserved for windows in overview mode. | |
| 136 const float kOverviewVerticalInset = 0.1f; | |
| 137 | |
| 138 // A View having rounded corners and a specified background color which is | |
| 139 // only painted within the bounds defined by the rounded corners. | |
| 140 // TODO(varkha): This duplicates code from RoundedImageView. Refactor these | |
| 141 // classes and move into ui/views. | |
| 142 class RoundedRectView : public views::View { | |
| 143 public: | |
| 144 RoundedRectView(int corner_radius, SkColor background) | |
| 145 : corner_radius_(corner_radius), background_(background) {} | |
| 146 | |
| 147 ~RoundedRectView() override {} | |
| 148 | |
| 149 void OnPaint(gfx::Canvas* canvas) override { | |
| 150 views::View::OnPaint(canvas); | |
| 151 | |
| 152 SkScalar radius = SkIntToScalar(corner_radius_); | |
| 153 const SkScalar kRadius[8] = {radius, radius, radius, radius, | |
| 154 radius, radius, radius, radius}; | |
| 155 SkPath path; | |
| 156 gfx::Rect bounds(size()); | |
| 157 bounds.set_height(bounds.height() + radius); | |
| 158 path.addRoundRect(gfx::RectToSkRect(bounds), kRadius); | |
| 159 | |
| 160 SkPaint paint; | |
| 161 paint.setAntiAlias(true); | |
| 162 canvas->ClipPath(path, true); | |
| 163 canvas->DrawColor(background_); | |
| 164 } | |
| 165 | |
| 166 private: | |
| 167 int corner_radius_; | |
| 168 SkColor background_; | |
| 169 | |
| 170 DISALLOW_COPY_AND_ASSIGN(RoundedRectView); | |
| 171 }; | |
| 172 | |
| 173 // BackgroundWith1PxBorder renders a solid background color, with a one pixel | |
| 174 // border with rounded corners. This accounts for the scaling of the canvas, so | |
| 175 // that the border is 1 pixel thick regardless of display scaling. | |
| 176 class BackgroundWith1PxBorder : public views::Background { | |
| 177 public: | |
| 178 BackgroundWith1PxBorder(SkColor background, | |
| 179 SkColor border_color, | |
| 180 int border_thickness, | |
| 181 int corner_radius); | |
| 182 | |
| 183 void Paint(gfx::Canvas* canvas, views::View* view) const override; | |
| 184 | |
| 185 private: | |
| 186 // Color for the one pixel border. | |
| 187 SkColor border_color_; | |
| 188 | |
| 189 // Thickness of border inset. | |
| 190 int border_thickness_; | |
| 191 | |
| 192 // Corner radius of the inside edge of the roundrect border stroke. | |
| 193 int corner_radius_; | |
| 194 | |
| 195 DISALLOW_COPY_AND_ASSIGN(BackgroundWith1PxBorder); | |
| 196 }; | |
| 197 | |
| 198 BackgroundWith1PxBorder::BackgroundWith1PxBorder(SkColor background, | |
| 199 SkColor border_color, | |
| 200 int border_thickness, | |
| 201 int corner_radius) | |
| 202 : border_color_(border_color), | |
| 203 border_thickness_(border_thickness), | |
| 204 corner_radius_(corner_radius) { | |
| 205 SetNativeControlColor(background); | |
| 206 } | |
| 207 | |
| 208 void BackgroundWith1PxBorder::Paint(gfx::Canvas* canvas, | |
| 209 views::View* view) const { | |
| 210 gfx::RectF border_rect_f(view->GetContentsBounds()); | |
| 211 | |
| 212 gfx::ScopedCanvas scoped_canvas(canvas); | |
| 213 const float scale = canvas->UndoDeviceScaleFactor(); | |
| 214 border_rect_f.Scale(scale); | |
| 215 if (border_thickness_ > 0) { | |
| 216 const float inset = border_thickness_ * scale - 0.5f; | |
| 217 border_rect_f.Inset(inset, inset); | |
| 218 } | |
| 219 | |
| 220 SkPath path; | |
| 221 const SkScalar scaled_corner_radius = | |
| 222 SkFloatToScalar(corner_radius_ * scale + 0.5f); | |
| 223 path.addRoundRect(gfx::RectFToSkRect(border_rect_f), scaled_corner_radius, | |
| 224 scaled_corner_radius); | |
| 225 | |
| 226 SkPaint paint; | |
| 227 paint.setStyle(SkPaint::kStroke_Style); | |
| 228 paint.setStrokeWidth(1); | |
| 229 paint.setAntiAlias(true); | |
| 230 | |
| 231 SkPath stroke_path; | |
| 232 paint.getFillPath(path, &stroke_path); | |
| 233 | |
| 234 SkPath fill_path; | |
| 235 Op(path, stroke_path, kDifference_SkPathOp, &fill_path); | |
| 236 paint.setStyle(SkPaint::kFill_Style); | |
| 237 paint.setColor(get_color()); | |
| 238 canvas->sk_canvas()->drawPath(fill_path, paint); | |
| 239 | |
| 240 if (border_thickness_ > 0) { | |
| 241 paint.setColor(border_color_); | |
| 242 canvas->sk_canvas()->drawPath(stroke_path, paint); | |
| 243 } | |
| 244 } | |
| 245 | |
| 246 // Returns the vector for the fade in animation. | |
| 247 gfx::Vector2d GetSlideVectorForFadeIn(WindowSelector::Direction direction, | |
| 248 const gfx::Rect& bounds) { | |
| 249 gfx::Vector2d vector; | |
| 250 const bool material = ash::MaterialDesignController::IsOverviewMaterial(); | |
| 251 switch (direction) { | |
| 252 case WindowSelector::UP: | |
| 253 if (!material) { | |
| 254 vector.set_y(-bounds.height()); | |
| 255 break; | |
| 256 } | |
| 257 case WindowSelector::LEFT: | |
| 258 vector.set_x(-bounds.width()); | |
| 259 break; | |
| 260 case WindowSelector::DOWN: | |
| 261 if (!material) { | |
| 262 vector.set_y(bounds.height()); | |
| 263 break; | |
| 264 } | |
| 265 case WindowSelector::RIGHT: | |
| 266 vector.set_x(bounds.width()); | |
| 267 break; | |
| 268 } | |
| 269 return vector; | |
| 270 } | |
| 271 | |
| 272 // Given |root_window|, calculates the item size necessary to fit |items| | |
| 273 // items in the window selection. |bounding_rect| is set to the centered | |
| 274 // rectangle containing the grid and |item_size| is set to the size of each | |
| 275 // individual item. | |
| 276 void CalculateOverviewSizes(WmWindow* root_window, | |
| 277 size_t items, | |
| 278 int text_filter_bottom, | |
| 279 gfx::Rect* bounding_rect, | |
| 280 gfx::Size* item_size) { | |
| 281 gfx::Rect total_bounds = root_window->ConvertRectToScreen( | |
| 282 wm::GetDisplayWorkAreaBoundsInParent(root_window->GetChildByShellWindowId( | |
| 283 kShellWindowId_DefaultContainer))); | |
| 284 | |
| 285 // Reserve space at the top for the text filtering textbox to appear. | |
| 286 total_bounds.Inset(0, text_filter_bottom + kTextFilterBottomMargin, 0, 0); | |
| 287 | |
| 288 // Find the minimum number of windows per row that will fit all of the | |
| 289 // windows on screen. | |
| 290 int num_columns = std::max( | |
| 291 total_bounds.width() > total_bounds.height() ? kMinCardsMajor : 1, | |
| 292 static_cast<int>(ceil(sqrt(total_bounds.width() * items / | |
| 293 (kCardAspectRatio * total_bounds.height()))))); | |
| 294 int num_rows = ((items + num_columns - 1) / num_columns); | |
| 295 item_size->set_width(std::min( | |
| 296 static_cast<int>(total_bounds.width() / num_columns), | |
| 297 static_cast<int>(total_bounds.height() * kCardAspectRatio / num_rows))); | |
| 298 item_size->set_height( | |
| 299 static_cast<int>(item_size->width() / kCardAspectRatio)); | |
| 300 item_size->SetToMax(gfx::Size(1, 1)); | |
| 301 | |
| 302 bounding_rect->set_width(std::min(static_cast<int>(items), num_columns) * | |
| 303 item_size->width()); | |
| 304 bounding_rect->set_height(num_rows * item_size->height()); | |
| 305 // Calculate the X and Y offsets necessary to center the grid. | |
| 306 bounding_rect->set_x(total_bounds.x() + | |
| 307 (total_bounds.width() - bounding_rect->width()) / 2); | |
| 308 bounding_rect->set_y(total_bounds.y() + | |
| 309 (total_bounds.height() - bounding_rect->height()) / 2); | |
| 310 } | |
| 311 | |
| 312 // Reorders the list of windows |items| in |root_window| in an attempt to | |
| 313 // minimize the distance each window will travel to enter overview. For | |
| 314 // equidistant windows preserves a stable order between overview sessions | |
| 315 // by comparing window pointers. | |
| 316 void ReorderItemsGreedyLeastMovement(std::vector<WmWindow*>* items, | |
| 317 WmWindow* root_window, | |
| 318 int text_filter_bottom) { | |
| 319 if (items->empty()) | |
| 320 return; | |
| 321 gfx::Rect bounding_rect; | |
| 322 gfx::Size item_size; | |
| 323 CalculateOverviewSizes(root_window, items->size(), text_filter_bottom, | |
| 324 &bounding_rect, &item_size); | |
| 325 int num_columns = std::min(static_cast<int>(items->size()), | |
| 326 bounding_rect.width() / item_size.width()); | |
| 327 for (size_t i = 0; i < items->size(); ++i) { | |
| 328 int column = i % num_columns; | |
| 329 int row = i / num_columns; | |
| 330 gfx::Point overview_item_center( | |
| 331 bounding_rect.x() + column * item_size.width() + item_size.width() / 2, | |
| 332 bounding_rect.y() + row * item_size.height() + item_size.height() / 2); | |
| 333 // Find the nearest window for this position. | |
| 334 size_t swap_index = i; | |
| 335 int64_t shortest_distance = std::numeric_limits<int64_t>::max(); | |
| 336 for (size_t j = i; j < items->size(); ++j) { | |
| 337 WmWindow* window = (*items)[j]; | |
| 338 const gfx::Rect screen_target_bounds = | |
| 339 window->ConvertRectToScreen(window->GetTargetBounds()); | |
| 340 int64_t distance = | |
| 341 (screen_target_bounds.CenterPoint() - overview_item_center) | |
| 342 .LengthSquared(); | |
| 343 // We compare raw pointers to create a stable ordering given two windows | |
| 344 // with the same center point. | |
| 345 if (distance < shortest_distance || | |
| 346 (distance == shortest_distance && window < (*items)[swap_index])) { | |
| 347 shortest_distance = distance; | |
| 348 swap_index = j; | |
| 349 } | |
| 350 } | |
| 351 if (swap_index > i) | |
| 352 std::swap((*items)[i], (*items)[swap_index]); | |
| 353 } | |
| 354 } | |
| 355 | |
| 356 // Creates and returns a background translucent widget parented in | |
| 357 // |root_window|'s default container and having |background_color|. | |
| 358 // When |border_thickness| is non-zero, a border is created having | |
| 359 // |border_color|, otherwise |border_color| parameter is ignored. | |
| 360 views::Widget* CreateBackgroundWidget(WmWindow* root_window, | |
| 361 SkColor background_color, | |
| 362 int border_thickness, | |
| 363 int border_radius, | |
| 364 SkColor border_color) { | |
| 365 views::Widget* widget = new views::Widget; | |
| 366 views::Widget::InitParams params; | |
| 367 params.type = views::Widget::InitParams::TYPE_POPUP; | |
| 368 params.keep_on_top = false; | |
| 369 params.ownership = views::Widget::InitParams::WIDGET_OWNS_NATIVE_WIDGET; | |
| 370 params.opacity = views::Widget::InitParams::TRANSLUCENT_WINDOW; | |
| 371 params.accept_events = false; | |
| 372 widget->set_focus_on_creation(false); | |
| 373 // Parenting in kShellWindowId_DesktopBackgroundContainer allows proper | |
| 374 // layering of the shield and selection widgets. Since that container is | |
| 375 // created with USE_LOCAL_COORDINATES BoundsInScreenBehavior local bounds in | |
| 376 // |root_window_| need to be provided. | |
| 377 root_window->GetRootWindowController()->ConfigureWidgetInitParamsForContainer( | |
| 378 widget, kShellWindowId_DesktopBackgroundContainer, ¶ms); | |
| 379 widget->Init(params); | |
| 380 WmWindow* widget_window = WmLookup::Get()->GetWindowForWidget(widget); | |
| 381 // Disable the "bounce in" animation when showing the window. | |
| 382 widget_window->SetVisibilityAnimationTransition(::wm::ANIMATE_NONE); | |
| 383 // The background widget should not activate the shelf when passing under it. | |
| 384 widget_window->GetWindowState()->set_ignored_by_shelf(true); | |
| 385 | |
| 386 views::View* content_view = | |
| 387 new RoundedRectView(border_radius, SK_ColorTRANSPARENT); | |
| 388 if (ash::MaterialDesignController::IsOverviewMaterial()) { | |
| 389 content_view->set_background(new BackgroundWith1PxBorder( | |
| 390 background_color, border_color, border_thickness, border_radius)); | |
| 391 } else { | |
| 392 content_view->set_background( | |
| 393 views::Background::CreateSolidBackground(background_color)); | |
| 394 if (border_thickness) { | |
| 395 content_view->SetBorder( | |
| 396 views::Border::CreateSolidBorder(border_thickness, border_color)); | |
| 397 } | |
| 398 } | |
| 399 widget->SetContentsView(content_view); | |
| 400 widget_window->GetParent()->StackChildAtTop(widget_window); | |
| 401 widget->Show(); | |
| 402 // New background widget starts with 0 opacity and then fades in. | |
| 403 widget_window->SetOpacity(0.f); | |
| 404 return widget; | |
| 405 } | |
| 406 | |
| 407 } // namespace | |
| 408 | |
| 409 WindowGrid::WindowGrid(WmWindow* root_window, | |
| 410 const std::vector<WmWindow*>& windows, | |
| 411 WindowSelector* window_selector) | |
| 412 : root_window_(root_window), | |
| 413 window_selector_(window_selector), | |
| 414 selected_index_(0), | |
| 415 num_columns_(0) { | |
| 416 std::vector<WmWindow*> windows_in_root; | |
| 417 for (auto window : windows) { | |
| 418 if (window->GetRootWindow() == root_window) | |
| 419 windows_in_root.push_back(window); | |
| 420 } | |
| 421 | |
| 422 if (!ash::MaterialDesignController::IsOverviewMaterial() && | |
| 423 base::CommandLine::ForCurrentProcess()->HasSwitch( | |
| 424 switches::kAshEnableStableOverviewOrder)) { | |
| 425 // Reorder windows to try to minimize movement to target overview positions. | |
| 426 // This also creates a stable window ordering. | |
| 427 ReorderItemsGreedyLeastMovement(&windows_in_root, root_window_, | |
| 428 window_selector_->text_filter_bottom()); | |
| 429 } | |
| 430 for (auto window : windows_in_root) { | |
| 431 window->AddObserver(this); | |
| 432 observed_windows_.insert(window); | |
| 433 window_list_.push_back(new WindowSelectorItem(window, window_selector_)); | |
| 434 } | |
| 435 } | |
| 436 | |
| 437 WindowGrid::~WindowGrid() { | |
| 438 for (WmWindow* window : observed_windows_) | |
| 439 window->RemoveObserver(this); | |
| 440 } | |
| 441 | |
| 442 void WindowGrid::PrepareForOverview() { | |
| 443 if (ash::MaterialDesignController::IsOverviewMaterial()) | |
| 444 InitShieldWidget(); | |
| 445 for (auto iter = window_list_.begin(); iter != window_list_.end(); ++iter) | |
| 446 (*iter)->PrepareForOverview(); | |
| 447 } | |
| 448 | |
| 449 void WindowGrid::PositionWindowsMD(bool animate) { | |
| 450 if (window_list_.empty()) | |
| 451 return; | |
| 452 gfx::Rect total_bounds = | |
| 453 root_window_->ConvertRectToScreen(wm::GetDisplayWorkAreaBoundsInParent( | |
| 454 root_window_->GetChildByShellWindowId( | |
| 455 kShellWindowId_DefaultContainer))); | |
| 456 // Windows occupy vertically centered area with additional vertical insets. | |
| 457 int horizontal_inset = | |
| 458 gfx::ToFlooredInt(std::min(kOverviewInsetRatio * total_bounds.width(), | |
| 459 kOverviewInsetRatio * total_bounds.height())); | |
| 460 int vertical_inset = | |
| 461 horizontal_inset + | |
| 462 kOverviewVerticalInset * (total_bounds.height() - 2 * horizontal_inset); | |
| 463 total_bounds.Inset(std::max(0, horizontal_inset - kWindowMarginMD), | |
| 464 std::max(0, vertical_inset - kWindowMarginMD)); | |
| 465 std::vector<gfx::Rect> rects; | |
| 466 | |
| 467 // Keep track of the lowest coordinate. | |
| 468 int max_bottom = total_bounds.y(); | |
| 469 | |
| 470 // Right bound of the narrowest row. | |
| 471 int min_right = total_bounds.right(); | |
| 472 // Right bound of the widest row. | |
| 473 int max_right = total_bounds.x(); | |
| 474 | |
| 475 // Keep track of the difference between the narrowest and the widest row. | |
| 476 // Initially this is set to the worst it can ever be assuming the windows fit. | |
| 477 int width_diff = total_bounds.width(); | |
| 478 | |
| 479 // Initially allow the windows to occupy all available width. Shrink this | |
| 480 // available space horizontally to find the breakdown into rows that achieves | |
| 481 // the minimal |width_diff|. | |
| 482 int right_bound = total_bounds.right(); | |
| 483 | |
| 484 // Determine the optimal height bisecting between |low_height| and | |
| 485 // |high_height|. Once this optimal height is known, |height_fixed| is set to | |
| 486 // true and the rows are balanced by repeatedly squeezing the widest row to | |
| 487 // cause windows to overflow to the subsequent rows. | |
| 488 int low_height = 2 * kWindowMarginMD; | |
| 489 int high_height = | |
| 490 std::max(low_height, static_cast<int>(total_bounds.height() + 1)); | |
| 491 int height = 0.5 * (low_height + high_height); | |
| 492 bool height_fixed = false; | |
| 493 | |
| 494 // Repeatedly try to fit the windows |rects| within |right_bound|. | |
| 495 // If a maximum |height| is found such that all window |rects| fit, this | |
| 496 // fitting continues while shrinking the |right_bound| in order to balance the | |
| 497 // rows. If the windows fit the |right_bound| would have been decremented at | |
| 498 // least once so it needs to be incremented once before getting out of this | |
| 499 // loop and one additional pass made to actually fit the |rects|. | |
| 500 // If the |rects| cannot fit (e.g. there are too many windows) the bisection | |
| 501 // will still finish and we might increment the |right_bound| once pixel extra | |
| 502 // which is acceptable since there is an unused margin on the right. | |
| 503 bool make_last_adjustment = false; | |
| 504 while (true) { | |
| 505 gfx::Rect overview_bounds(total_bounds); | |
| 506 overview_bounds.set_width(right_bound - total_bounds.x()); | |
| 507 bool windows_fit = FitWindowRectsInBounds( | |
| 508 overview_bounds, std::min(kMaxHeight + 2 * kWindowMarginMD, height), | |
| 509 &rects, &max_bottom, &min_right, &max_right); | |
| 510 | |
| 511 if (height_fixed) { | |
| 512 if (!windows_fit) { | |
| 513 // Revert the previous change to |right_bound| and do one last pass. | |
| 514 right_bound++; | |
| 515 make_last_adjustment = true; | |
| 516 break; | |
| 517 } | |
| 518 // Break if all the windows are zero-width at the current scale. | |
| 519 if (max_right <= total_bounds.x()) | |
| 520 break; | |
| 521 } else { | |
| 522 // Find the optimal row height bisecting between |low_height| and | |
| 523 // |high_height|. | |
| 524 if (windows_fit) | |
| 525 low_height = height; | |
| 526 else | |
| 527 high_height = height; | |
| 528 height = 0.5 * (low_height + high_height); | |
| 529 // When height can no longer be improved, start balancing the rows. | |
| 530 if (height == low_height) | |
| 531 height_fixed = true; | |
| 532 } | |
| 533 | |
| 534 if (windows_fit && height_fixed) { | |
| 535 if (max_right - min_right <= width_diff) { | |
| 536 // Row alignment is getting better. Try to shrink the |right_bound| in | |
| 537 // order to squeeze the widest row. | |
| 538 right_bound = max_right - 1; | |
| 539 width_diff = max_right - min_right; | |
| 540 } else { | |
| 541 // Row alignment is getting worse. | |
| 542 // Revert the previous change to |right_bound| and do one last pass. | |
| 543 right_bound++; | |
| 544 make_last_adjustment = true; | |
| 545 break; | |
| 546 } | |
| 547 } | |
| 548 } | |
| 549 // Once the windows in |window_list_| no longer fit, the change to | |
| 550 // |right_bound| was reverted. Perform one last pass to position the |rects|. | |
| 551 if (make_last_adjustment) { | |
| 552 gfx::Rect overview_bounds(total_bounds); | |
| 553 overview_bounds.set_width(right_bound - total_bounds.x()); | |
| 554 FitWindowRectsInBounds(overview_bounds, | |
| 555 std::min(kMaxHeight + 2 * kWindowMarginMD, height), | |
| 556 &rects, &max_bottom, &min_right, &max_right); | |
| 557 } | |
| 558 // Position the windows centering the left-aligned rows vertically. | |
| 559 gfx::Vector2d offset(0, (total_bounds.bottom() - max_bottom) / 2); | |
| 560 for (size_t i = 0; i < window_list_.size(); ++i) { | |
| 561 window_list_[i]->SetBounds( | |
| 562 rects[i] + offset, | |
| 563 animate | |
| 564 ? OverviewAnimationType::OVERVIEW_ANIMATION_LAY_OUT_SELECTOR_ITEMS | |
| 565 : OverviewAnimationType::OVERVIEW_ANIMATION_NONE); | |
| 566 } | |
| 567 | |
| 568 // If the selection widget is active, reposition it without any animation. | |
| 569 if (selection_widget_) | |
| 570 MoveSelectionWidgetToTarget(animate); | |
| 571 } | |
| 572 | |
| 573 void WindowGrid::PositionWindows(bool animate) { | |
| 574 if (ash::MaterialDesignController::IsOverviewMaterial()) { | |
| 575 DCHECK(shield_widget_.get()); | |
| 576 // Keep the background shield widget covering the whole screen. | |
| 577 WmWindow* widget_window = | |
| 578 WmLookup::Get()->GetWindowForWidget(shield_widget_.get()); | |
| 579 const gfx::Rect bounds = widget_window->GetParent()->GetBounds(); | |
| 580 widget_window->SetBounds(bounds); | |
| 581 PositionWindowsMD(animate); | |
| 582 return; | |
| 583 } | |
| 584 CHECK(!window_list_.empty()); | |
| 585 gfx::Rect bounding_rect; | |
| 586 gfx::Size item_size; | |
| 587 CalculateOverviewSizes(root_window_, window_list_.size(), | |
| 588 window_selector_->text_filter_bottom(), &bounding_rect, | |
| 589 &item_size); | |
| 590 num_columns_ = std::min(static_cast<int>(window_list_.size()), | |
| 591 bounding_rect.width() / item_size.width()); | |
| 592 for (size_t i = 0; i < window_list_.size(); ++i) { | |
| 593 gfx::Transform transform; | |
| 594 int column = i % num_columns_; | |
| 595 int row = i / num_columns_; | |
| 596 gfx::Rect target_bounds(item_size.width() * column + bounding_rect.x(), | |
| 597 item_size.height() * row + bounding_rect.y(), | |
| 598 item_size.width(), item_size.height()); | |
| 599 window_list_[i]->SetBounds(target_bounds, animate ? | |
| 600 OverviewAnimationType::OVERVIEW_ANIMATION_LAY_OUT_SELECTOR_ITEMS : | |
| 601 OverviewAnimationType::OVERVIEW_ANIMATION_NONE); | |
| 602 } | |
| 603 | |
| 604 // If the selection widget is active, reposition it without any animation. | |
| 605 if (selection_widget_) | |
| 606 MoveSelectionWidgetToTarget(animate); | |
| 607 } | |
| 608 | |
| 609 bool WindowGrid::Move(WindowSelector::Direction direction, bool animate) { | |
| 610 bool recreate_selection_widget = false; | |
| 611 bool out_of_bounds = false; | |
| 612 bool changed_selection_index = false; | |
| 613 const bool material = ash::MaterialDesignController::IsOverviewMaterial(); | |
| 614 gfx::Rect old_bounds; | |
| 615 if (SelectedWindow()) { | |
| 616 old_bounds = SelectedWindow()->target_bounds(); | |
| 617 // Make the old selected window header non-transparent first. | |
| 618 SelectedWindow()->SetSelected(false); | |
| 619 } | |
| 620 | |
| 621 // With Material Design enabled [up] key is equivalent to [left] key and | |
| 622 // [down] key is equivalent to [right] key. | |
| 623 if (!selection_widget_) { | |
| 624 switch (direction) { | |
| 625 case WindowSelector::UP: | |
| 626 if (!material) { | |
| 627 selected_index_ = | |
| 628 (window_list_.size() / num_columns_) * num_columns_ - 1; | |
| 629 break; | |
| 630 } | |
| 631 case WindowSelector::LEFT: | |
| 632 selected_index_ = window_list_.size() - 1; | |
| 633 break; | |
| 634 case WindowSelector::DOWN: | |
| 635 case WindowSelector::RIGHT: | |
| 636 selected_index_ = 0; | |
| 637 break; | |
| 638 } | |
| 639 changed_selection_index = true; | |
| 640 } | |
| 641 while (!changed_selection_index || | |
| 642 (!out_of_bounds && window_list_[selected_index_]->dimmed())) { | |
| 643 switch (direction) { | |
| 644 case WindowSelector::UP: | |
| 645 if (!material) { | |
| 646 if (selected_index_ == 0) | |
| 647 out_of_bounds = true; | |
| 648 if (selected_index_ < num_columns_) { | |
| 649 selected_index_ += | |
| 650 num_columns_ * | |
| 651 ((window_list_.size() - selected_index_) / num_columns_) - | |
| 652 1; | |
| 653 recreate_selection_widget = true; | |
| 654 } else { | |
| 655 selected_index_ -= num_columns_; | |
| 656 } | |
| 657 break; | |
| 658 } | |
| 659 case WindowSelector::LEFT: | |
| 660 if (selected_index_ == 0) | |
| 661 out_of_bounds = true; | |
| 662 selected_index_--; | |
| 663 if (!material && (selected_index_ + 1) % num_columns_ == 0) | |
| 664 recreate_selection_widget = true; | |
| 665 break; | |
| 666 case WindowSelector::DOWN: | |
| 667 if (!material) { | |
| 668 selected_index_ += num_columns_; | |
| 669 if (selected_index_ >= window_list_.size()) { | |
| 670 selected_index_ = (selected_index_ + 1) % num_columns_; | |
| 671 if (selected_index_ == 0) | |
| 672 out_of_bounds = true; | |
| 673 recreate_selection_widget = true; | |
| 674 } | |
| 675 break; | |
| 676 } | |
| 677 case WindowSelector::RIGHT: | |
| 678 if (selected_index_ >= window_list_.size() - 1) | |
| 679 out_of_bounds = true; | |
| 680 selected_index_++; | |
| 681 if (!material && selected_index_ % num_columns_ == 0) | |
| 682 recreate_selection_widget = true; | |
| 683 break; | |
| 684 } | |
| 685 if (material) { | |
| 686 if (!out_of_bounds && SelectedWindow()) { | |
| 687 if (SelectedWindow()->target_bounds().y() != old_bounds.y()) | |
| 688 recreate_selection_widget = true; | |
| 689 } | |
| 690 } | |
| 691 changed_selection_index = true; | |
| 692 } | |
| 693 | |
| 694 MoveSelectionWidget(direction, recreate_selection_widget, | |
| 695 out_of_bounds, animate); | |
| 696 | |
| 697 // Make the new selected window header fully transparent. | |
| 698 if (SelectedWindow()) | |
| 699 SelectedWindow()->SetSelected(true); | |
| 700 return out_of_bounds; | |
| 701 } | |
| 702 | |
| 703 WindowSelectorItem* WindowGrid::SelectedWindow() const { | |
| 704 if (!selection_widget_) | |
| 705 return nullptr; | |
| 706 CHECK(selected_index_ < window_list_.size()); | |
| 707 return window_list_[selected_index_]; | |
| 708 } | |
| 709 | |
| 710 bool WindowGrid::Contains(const WmWindow* window) const { | |
| 711 for (const WindowSelectorItem* window_item : window_list_) { | |
| 712 if (window_item->Contains(window)) | |
| 713 return true; | |
| 714 } | |
| 715 return false; | |
| 716 } | |
| 717 | |
| 718 void WindowGrid::FilterItems(const base::string16& pattern) { | |
| 719 base::i18n::FixedPatternStringSearchIgnoringCaseAndAccents finder(pattern); | |
| 720 for (auto iter = window_list_.begin(); iter != window_list_.end(); iter++) { | |
| 721 if (finder.Search((*iter)->GetWindow()->GetTitle(), nullptr, nullptr)) { | |
| 722 (*iter)->SetDimmed(false); | |
| 723 } else { | |
| 724 (*iter)->SetDimmed(true); | |
| 725 if (selection_widget_ && SelectedWindow() == *iter) { | |
| 726 SelectedWindow()->SetSelected(false); | |
| 727 selection_widget_.reset(); | |
| 728 } | |
| 729 } | |
| 730 } | |
| 731 } | |
| 732 | |
| 733 void WindowGrid::OnWindowDestroying(WmWindow* window) { | |
| 734 window->RemoveObserver(this); | |
| 735 observed_windows_.erase(window); | |
| 736 ScopedVector<WindowSelectorItem>::iterator iter = | |
| 737 std::find_if(window_list_.begin(), window_list_.end(), | |
| 738 WindowSelectorItemComparator(window)); | |
| 739 | |
| 740 DCHECK(iter != window_list_.end()); | |
| 741 | |
| 742 size_t removed_index = iter - window_list_.begin(); | |
| 743 window_list_.erase(iter); | |
| 744 | |
| 745 if (empty()) { | |
| 746 // If the grid is now empty, notify the window selector so that it erases us | |
| 747 // from its grid list. | |
| 748 window_selector_->OnGridEmpty(this); | |
| 749 return; | |
| 750 } | |
| 751 | |
| 752 // If selecting, update the selection index. | |
| 753 if (selection_widget_) { | |
| 754 bool send_focus_alert = selected_index_ == removed_index; | |
| 755 if (selected_index_ >= removed_index && selected_index_ != 0) | |
| 756 selected_index_--; | |
| 757 if (send_focus_alert) | |
| 758 SelectedWindow()->SendAccessibleSelectionEvent(); | |
| 759 } | |
| 760 | |
| 761 PositionWindows(true); | |
| 762 } | |
| 763 | |
| 764 void WindowGrid::OnWindowBoundsChanged(WmWindow* window, | |
| 765 const gfx::Rect& old_bounds, | |
| 766 const gfx::Rect& new_bounds) { | |
| 767 auto iter = std::find_if(window_list_.begin(), window_list_.end(), | |
| 768 WindowSelectorItemComparator(window)); | |
| 769 DCHECK(iter != window_list_.end()); | |
| 770 | |
| 771 // Immediately finish any active bounds animation. | |
| 772 window->StopAnimatingProperty(ui::LayerAnimationElement::BOUNDS); | |
| 773 | |
| 774 // Recompute the transform for the window. | |
| 775 (*iter)->RecomputeWindowTransforms(); | |
| 776 } | |
| 777 | |
| 778 void WindowGrid::InitShieldWidget() { | |
| 779 shield_widget_.reset(CreateBackgroundWidget(root_window_, kShieldColor, 0, 0, | |
| 780 SK_ColorTRANSPARENT)); | |
| 781 | |
| 782 WmWindow* widget_window = | |
| 783 WmLookup::Get()->GetWindowForWidget(shield_widget_.get()); | |
| 784 const gfx::Rect bounds = widget_window->GetParent()->GetBounds(); | |
| 785 widget_window->SetBounds(bounds); | |
| 786 | |
| 787 ui::ScopedLayerAnimationSettings animation_settings( | |
| 788 widget_window->GetLayer()->GetAnimator()); | |
| 789 animation_settings.SetTransitionDuration(base::TimeDelta::FromMilliseconds( | |
| 790 kOverviewSelectorTransitionMilliseconds)); | |
| 791 animation_settings.SetTweenType(gfx::Tween::LINEAR_OUT_SLOW_IN); | |
| 792 animation_settings.SetPreemptionStrategy( | |
| 793 ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET); | |
| 794 shield_widget_->SetOpacity(1.f); | |
| 795 } | |
| 796 | |
| 797 void WindowGrid::InitSelectionWidget(WindowSelector::Direction direction) { | |
| 798 const bool material = ash::MaterialDesignController::IsOverviewMaterial(); | |
| 799 const int border_thickness = material ? kWindowSelectionBorderThicknessMD | |
| 800 : kWindowSelectionBorderThickness; | |
| 801 const int border_color = | |
| 802 material ? kWindowSelectionBorderColorMD : kWindowSelectionBorderColor; | |
| 803 const int selection_color = | |
| 804 material ? kWindowSelectionColorMD : kWindowSelectionColor; | |
| 805 const int border_radius = | |
| 806 material ? kWindowSelectionRadiusMD : kWindowSelectionRadius; | |
| 807 selection_widget_.reset(CreateBackgroundWidget(root_window_, selection_color, | |
| 808 border_thickness, | |
| 809 border_radius, border_color)); | |
| 810 | |
| 811 WmWindow* widget_window = | |
| 812 WmLookup::Get()->GetWindowForWidget(selection_widget_.get()); | |
| 813 const gfx::Rect target_bounds = | |
| 814 root_window_->ConvertRectFromScreen(SelectedWindow()->target_bounds()); | |
| 815 gfx::Vector2d fade_out_direction = | |
| 816 GetSlideVectorForFadeIn(direction, target_bounds); | |
| 817 widget_window->SetBounds(target_bounds - fade_out_direction); | |
| 818 } | |
| 819 | |
| 820 void WindowGrid::MoveSelectionWidget(WindowSelector::Direction direction, | |
| 821 bool recreate_selection_widget, | |
| 822 bool out_of_bounds, | |
| 823 bool animate) { | |
| 824 // If the selection widget is already active, fade it out in the selection | |
| 825 // direction. | |
| 826 if (selection_widget_ && (recreate_selection_widget || out_of_bounds)) { | |
| 827 // Animate the old selection widget and then destroy it. | |
| 828 views::Widget* old_selection = selection_widget_.get(); | |
| 829 WmWindow* old_selection_window = | |
| 830 WmLookup::Get()->GetWindowForWidget(old_selection); | |
| 831 gfx::Vector2d fade_out_direction = | |
| 832 GetSlideVectorForFadeIn(direction, old_selection_window->GetBounds()); | |
| 833 | |
| 834 ui::ScopedLayerAnimationSettings animation_settings( | |
| 835 old_selection_window->GetLayer()->GetAnimator()); | |
| 836 animation_settings.SetTransitionDuration( | |
| 837 base::TimeDelta::FromMilliseconds( | |
| 838 kOverviewSelectorTransitionMilliseconds)); | |
| 839 animation_settings.SetPreemptionStrategy( | |
| 840 ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET); | |
| 841 animation_settings.SetTweenType(gfx::Tween::FAST_OUT_LINEAR_IN); | |
| 842 // CleanupWidgetAfterAnimationObserver will delete itself (and the | |
| 843 // widget) when the movement animation is complete. | |
| 844 animation_settings.AddObserver( | |
| 845 new CleanupWidgetAfterAnimationObserver(std::move(selection_widget_))); | |
| 846 old_selection->SetOpacity(0.f); | |
| 847 old_selection_window->SetBounds(old_selection_window->GetBounds() + | |
| 848 fade_out_direction); | |
| 849 old_selection->Hide(); | |
| 850 } | |
| 851 if (out_of_bounds) | |
| 852 return; | |
| 853 | |
| 854 if (!selection_widget_) | |
| 855 InitSelectionWidget(direction); | |
| 856 // Send an a11y alert so that if ChromeVox is enabled, the item label is | |
| 857 // read. | |
| 858 SelectedWindow()->SendAccessibleSelectionEvent(); | |
| 859 // The selection widget is moved to the newly selected item in the same | |
| 860 // grid. | |
| 861 MoveSelectionWidgetToTarget(animate); | |
| 862 } | |
| 863 | |
| 864 void WindowGrid::MoveSelectionWidgetToTarget(bool animate) { | |
| 865 gfx::Rect bounds = | |
| 866 root_window_->ConvertRectFromScreen(SelectedWindow()->target_bounds()); | |
| 867 if (ash::MaterialDesignController::IsOverviewMaterial()) | |
| 868 bounds.Inset(kSelectionInset, kSelectionInset); | |
| 869 if (animate) { | |
| 870 WmWindow* selection_widget_window = | |
| 871 WmLookup::Get()->GetWindowForWidget(selection_widget_.get()); | |
| 872 ui::ScopedLayerAnimationSettings animation_settings( | |
| 873 selection_widget_window->GetLayer()->GetAnimator()); | |
| 874 animation_settings.SetTransitionDuration(base::TimeDelta::FromMilliseconds( | |
| 875 kOverviewSelectorTransitionMilliseconds)); | |
| 876 animation_settings.SetTweenType(gfx::Tween::LINEAR_OUT_SLOW_IN); | |
| 877 animation_settings.SetPreemptionStrategy( | |
| 878 ui::LayerAnimator::IMMEDIATELY_ANIMATE_TO_NEW_TARGET); | |
| 879 selection_widget_->SetBounds(bounds); | |
| 880 selection_widget_->SetOpacity(1.f); | |
| 881 return; | |
| 882 } | |
| 883 selection_widget_->SetBounds(bounds); | |
| 884 selection_widget_->SetOpacity(1.f); | |
| 885 } | |
| 886 | |
| 887 bool WindowGrid::FitWindowRectsInBounds(const gfx::Rect& bounds, | |
| 888 int height, | |
| 889 std::vector<gfx::Rect>* rects, | |
| 890 int* max_bottom, | |
| 891 int* min_right, | |
| 892 int* max_right) { | |
| 893 rects->resize(window_list_.size()); | |
| 894 bool windows_fit = true; | |
| 895 | |
| 896 // Start in the top-left corner of |bounds|. | |
| 897 int left = bounds.x(); | |
| 898 int top = bounds.y(); | |
| 899 | |
| 900 // Keep track of the lowest coordinate. | |
| 901 *max_bottom = bounds.y(); | |
| 902 | |
| 903 // Right bound of the narrowest row. | |
| 904 *min_right = bounds.right(); | |
| 905 // Right bound of the widest row. | |
| 906 *max_right = bounds.x(); | |
| 907 | |
| 908 // With Material Design all elements are of same height and only the height is | |
| 909 // necessary to determine each item's scale. | |
| 910 const gfx::Size item_size(0, height); | |
| 911 size_t i = 0; | |
| 912 for (auto window : window_list_) { | |
| 913 const gfx::Rect target_bounds = window->GetWindow()->GetTargetBounds(); | |
| 914 const int width = | |
| 915 std::max(1, gfx::ToFlooredInt(target_bounds.width() * | |
| 916 window->GetItemScale(item_size)) + | |
| 917 2 * kWindowMarginMD); | |
| 918 if (left + width > bounds.right()) { | |
| 919 // Move to the next row if possible. | |
| 920 if (*min_right > left) | |
| 921 *min_right = left; | |
| 922 if (*max_right < left) | |
| 923 *max_right = left; | |
| 924 top += height; | |
| 925 | |
| 926 // Check if the new row reaches the bottom or if the first item in the new | |
| 927 // row does not fit within the available width. | |
| 928 if (top + height > bounds.bottom() || | |
| 929 bounds.x() + width > bounds.right()) { | |
| 930 windows_fit = false; | |
| 931 break; | |
| 932 } | |
| 933 left = bounds.x(); | |
| 934 } | |
| 935 | |
| 936 // Position the current rect. | |
| 937 (*rects)[i].SetRect(left, top, width, height); | |
| 938 | |
| 939 // Increment horizontal position using sanitized positive |width()|. | |
| 940 left += (*rects)[i].width(); | |
| 941 | |
| 942 if (++i == window_list_.size()) { | |
| 943 // Update the narrowest and widest row width for the last row. | |
| 944 if (*min_right > left) | |
| 945 *min_right = left; | |
| 946 if (*max_right < left) | |
| 947 *max_right = left; | |
| 948 } | |
| 949 *max_bottom = top + height; | |
| 950 } | |
| 951 return windows_fit; | |
| 952 } | |
| 953 | |
| 954 } // namespace ash | |
| OLD | NEW |
|---|
Chromium Code Reviews
Issue 2087153003:
Moves common code in ash/wm/overview to ash/common/wm/overview (Closed)
Base URL: https://chromium.googlesource.com/chromium/src.git@master