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Issue 2736573002: chromeos: Move files in //ash/common to //ash, part 2 (Closed)
Patch Set: Created 3 years, 9 months ago
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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 "ash/common/wm/window_resizer.h"
6
7 #include "ash/common/wm/dock/docked_window_layout_manager.h"
8 #include "ash/common/wm/root_window_finder.h"
9 #include "ash/common/wm/window_positioning_utils.h"
10 #include "ash/common/wm/window_state.h"
11 #include "ash/common/wm_window.h"
12 #include "ui/base/hit_test.h"
13 #include "ui/base/ui_base_types.h"
14 #include "ui/display/display.h"
15 #include "ui/display/screen.h"
16 #include "ui/gfx/geometry/rect.h"
17
18 namespace ash {
19
20 namespace {
21
22 // Returns true for resize components along the right edge, where a drag in
23 // positive x will make the window larger.
24 bool IsRightEdge(int window_component) {
25 return window_component == HTTOPRIGHT || window_component == HTRIGHT ||
26 window_component == HTBOTTOMRIGHT || window_component == HTGROWBOX;
27 }
28
29 } // namespace
30
31 // static
32 const int WindowResizer::kBoundsChange_None = 0;
33 // static
34 const int WindowResizer::kBoundsChange_Repositions = 1;
35 // static
36 const int WindowResizer::kBoundsChange_Resizes = 2;
37
38 // static
39 const int WindowResizer::kBoundsChangeDirection_None = 0;
40 // static
41 const int WindowResizer::kBoundsChangeDirection_Horizontal = 1;
42 // static
43 const int WindowResizer::kBoundsChangeDirection_Vertical = 2;
44
45 WindowResizer::WindowResizer(wm::WindowState* window_state)
46 : window_state_(window_state) {
47 DCHECK(window_state_->drag_details());
48 }
49
50 WindowResizer::~WindowResizer() {}
51
52 // static
53 int WindowResizer::GetBoundsChangeForWindowComponent(int component) {
54 int bounds_change = WindowResizer::kBoundsChange_None;
55 switch (component) {
56 case HTTOPLEFT:
57 case HTTOP:
58 case HTTOPRIGHT:
59 case HTLEFT:
60 case HTBOTTOMLEFT:
61 bounds_change |= WindowResizer::kBoundsChange_Repositions |
62 WindowResizer::kBoundsChange_Resizes;
63 break;
64 case HTCAPTION:
65 bounds_change |= WindowResizer::kBoundsChange_Repositions;
66 break;
67 case HTRIGHT:
68 case HTBOTTOMRIGHT:
69 case HTBOTTOM:
70 case HTGROWBOX:
71 bounds_change |= WindowResizer::kBoundsChange_Resizes;
72 break;
73 default:
74 break;
75 }
76 return bounds_change;
77 }
78
79 // static
80 int WindowResizer::GetPositionChangeDirectionForWindowComponent(
81 int window_component) {
82 int pos_change_direction = WindowResizer::kBoundsChangeDirection_None;
83 switch (window_component) {
84 case HTTOPLEFT:
85 case HTBOTTOMRIGHT:
86 case HTGROWBOX:
87 case HTCAPTION:
88 pos_change_direction |= WindowResizer::kBoundsChangeDirection_Horizontal |
89 WindowResizer::kBoundsChangeDirection_Vertical;
90 break;
91 case HTTOP:
92 case HTTOPRIGHT:
93 case HTBOTTOM:
94 pos_change_direction |= WindowResizer::kBoundsChangeDirection_Vertical;
95 break;
96 case HTBOTTOMLEFT:
97 case HTRIGHT:
98 case HTLEFT:
99 pos_change_direction |= WindowResizer::kBoundsChangeDirection_Horizontal;
100 break;
101 default:
102 break;
103 }
104 return pos_change_direction;
105 }
106
107 gfx::Rect WindowResizer::CalculateBoundsForDrag(
108 const gfx::Point& passed_location) {
109 if (!details().is_resizable)
110 return details().initial_bounds_in_parent;
111
112 gfx::Point location = passed_location;
113 int delta_x = location.x() - details().initial_location_in_parent.x();
114 int delta_y = location.y() - details().initial_location_in_parent.y();
115
116 AdjustDeltaForTouchResize(&delta_x, &delta_y);
117
118 // The minimize size constraint may limit how much we change the window
119 // position. For example, dragging the left edge to the right should stop
120 // repositioning the window when the minimize size is reached.
121 gfx::Size size = GetSizeForDrag(&delta_x, &delta_y);
122 gfx::Point origin = GetOriginForDrag(delta_x, delta_y);
123 gfx::Rect new_bounds(origin, size);
124
125 // Sizing has to keep the result on the screen. Note that this correction
126 // has to come first since it might have an impact on the origin as well as
127 // on the size.
128 if (details().bounds_change & kBoundsChange_Resizes) {
129 gfx::Rect work_area = GetTarget()->GetDisplayNearestWindow().work_area();
130 DockedWindowLayoutManager* dock_layout =
131 DockedWindowLayoutManager::Get(GetTarget());
132
133 work_area.Union(dock_layout->docked_bounds());
134 work_area = GetTarget()->GetParent()->ConvertRectFromScreen(work_area);
135 if (details().size_change_direction & kBoundsChangeDirection_Horizontal) {
136 if (IsRightEdge(details().window_component) &&
137 new_bounds.right() < work_area.x() + wm::kMinimumOnScreenArea) {
138 int delta =
139 work_area.x() + wm::kMinimumOnScreenArea - new_bounds.right();
140 new_bounds.set_width(new_bounds.width() + delta);
141 } else if (new_bounds.x() >
142 work_area.right() - wm::kMinimumOnScreenArea) {
143 int width =
144 new_bounds.right() - work_area.right() + wm::kMinimumOnScreenArea;
145 new_bounds.set_x(work_area.right() - wm::kMinimumOnScreenArea);
146 new_bounds.set_width(width);
147 }
148 }
149 if (details().size_change_direction & kBoundsChangeDirection_Vertical) {
150 if (!IsBottomEdge(details().window_component) &&
151 new_bounds.y() > work_area.bottom() - wm::kMinimumOnScreenArea) {
152 int height =
153 new_bounds.bottom() - work_area.bottom() + wm::kMinimumOnScreenArea;
154 new_bounds.set_y(work_area.bottom() - wm::kMinimumOnScreenArea);
155 new_bounds.set_height(height);
156 } else if (details().window_component == HTBOTTOM ||
157 details().window_component == HTBOTTOMRIGHT ||
158 details().window_component == HTBOTTOMLEFT) {
159 // Update bottom edge to stay in the work area when we are resizing
160 // by dragging the bottom edge or corners.
161 if (new_bounds.bottom() > work_area.bottom())
162 new_bounds.Inset(0, 0, 0, new_bounds.bottom() - work_area.bottom());
163 }
164 }
165 if (details().bounds_change & kBoundsChange_Repositions &&
166 new_bounds.y() < 0) {
167 int delta = new_bounds.y();
168 new_bounds.set_y(0);
169 new_bounds.set_height(new_bounds.height() + delta);
170 }
171 }
172
173 if (details().bounds_change & kBoundsChange_Repositions) {
174 // When we might want to reposition a window which is also restored to its
175 // previous size, to keep the cursor within the dragged window.
176 if (!details().restore_bounds.IsEmpty()) {
177 // However - it is not desirable to change the origin if the window would
178 // be still hit by the cursor.
179 if (details().initial_location_in_parent.x() >
180 details().initial_bounds_in_parent.x() +
181 details().restore_bounds.width())
182 new_bounds.set_x(location.x() - details().restore_bounds.width() / 2);
183 }
184
185 // Make sure that |new_bounds| doesn't leave any of the displays. Note that
186 // the |work_area| above isn't good for this check since it is the work area
187 // for the current display but the window can move to a different one.
188 WmWindow* parent = GetTarget()->GetParent();
189 gfx::Point passed_location_in_screen(
190 parent->ConvertPointToScreen(passed_location));
191 gfx::Rect near_passed_location(passed_location_in_screen, gfx::Size());
192 // Use a pointer location (matching the logic in DragWindowResizer) to
193 // calculate the target display after the drag.
194 const display::Display& display =
195 display::Screen::GetScreen()->GetDisplayMatching(near_passed_location);
196 DockedWindowLayoutManager* dock_layout = DockedWindowLayoutManager::Get(
197 wm::GetRootWindowMatching(near_passed_location));
198
199 gfx::Rect screen_work_area = display.work_area();
200 screen_work_area.Union(dock_layout->docked_bounds());
201 screen_work_area.Inset(wm::kMinimumOnScreenArea, 0);
202 gfx::Rect new_bounds_in_screen = parent->ConvertRectToScreen(new_bounds);
203 if (!screen_work_area.Intersects(new_bounds_in_screen)) {
204 // Make sure that the x origin does not leave the current display.
205 new_bounds_in_screen.set_x(std::max(
206 screen_work_area.x() - new_bounds.width(),
207 std::min(screen_work_area.right(), new_bounds_in_screen.x())));
208 new_bounds = parent->ConvertRectFromScreen(new_bounds_in_screen);
209 }
210 }
211
212 return new_bounds;
213 }
214
215 // static
216 bool WindowResizer::IsBottomEdge(int window_component) {
217 return window_component == HTBOTTOMLEFT || window_component == HTBOTTOM ||
218 window_component == HTBOTTOMRIGHT || window_component == HTGROWBOX;
219 }
220
221 void WindowResizer::AdjustDeltaForTouchResize(int* delta_x, int* delta_y) {
222 if (details().source != aura::client::WINDOW_MOVE_SOURCE_TOUCH ||
223 !(details().bounds_change & kBoundsChange_Resizes))
224 return;
225
226 if (details().size_change_direction & kBoundsChangeDirection_Horizontal) {
227 if (IsRightEdge(details().window_component)) {
228 *delta_x += details().initial_location_in_parent.x() -
229 details().initial_bounds_in_parent.right();
230 } else {
231 *delta_x += details().initial_location_in_parent.x() -
232 details().initial_bounds_in_parent.x();
233 }
234 }
235 if (details().size_change_direction & kBoundsChangeDirection_Vertical) {
236 if (IsBottomEdge(details().window_component)) {
237 *delta_y += details().initial_location_in_parent.y() -
238 details().initial_bounds_in_parent.bottom();
239 } else {
240 *delta_y += details().initial_location_in_parent.y() -
241 details().initial_bounds_in_parent.y();
242 }
243 }
244 }
245
246 gfx::Point WindowResizer::GetOriginForDrag(int delta_x, int delta_y) {
247 gfx::Point origin = details().initial_bounds_in_parent.origin();
248 if (details().bounds_change & kBoundsChange_Repositions) {
249 int pos_change_direction = GetPositionChangeDirectionForWindowComponent(
250 details().window_component);
251 if (pos_change_direction & kBoundsChangeDirection_Horizontal)
252 origin.Offset(delta_x, 0);
253 if (pos_change_direction & kBoundsChangeDirection_Vertical)
254 origin.Offset(0, delta_y);
255 }
256 return origin;
257 }
258
259 gfx::Size WindowResizer::GetSizeForDrag(int* delta_x, int* delta_y) {
260 gfx::Size size = details().initial_bounds_in_parent.size();
261 if (details().bounds_change & kBoundsChange_Resizes) {
262 gfx::Size min_size = GetTarget()->GetMinimumSize();
263 size.SetSize(GetWidthForDrag(min_size.width(), delta_x),
264 GetHeightForDrag(min_size.height(), delta_y));
265 } else if (!details().restore_bounds.IsEmpty()) {
266 size = details().restore_bounds.size();
267 }
268 return size;
269 }
270
271 int WindowResizer::GetWidthForDrag(int min_width, int* delta_x) {
272 int width = details().initial_bounds_in_parent.width();
273 if (details().size_change_direction & kBoundsChangeDirection_Horizontal) {
274 // Along the right edge, positive delta_x increases the window size.
275 int x_multiplier = IsRightEdge(details().window_component) ? 1 : -1;
276 width += x_multiplier * (*delta_x);
277
278 // Ensure we don't shrink past the minimum width and clamp delta_x
279 // for the window origin computation.
280 if (width < min_width) {
281 width = min_width;
282 *delta_x = -x_multiplier *
283 (details().initial_bounds_in_parent.width() - min_width);
284 }
285
286 // And don't let the window go bigger than the display.
287 int max_width = GetTarget()->GetDisplayNearestWindow().bounds().width();
288 gfx::Size max_size = GetTarget()->GetMaximumSize();
289 if (max_size.width() != 0)
290 max_width = std::min(max_width, max_size.width());
291 if (width > max_width) {
292 width = max_width;
293 *delta_x = -x_multiplier *
294 (details().initial_bounds_in_parent.width() - max_width);
295 }
296 }
297 return width;
298 }
299
300 int WindowResizer::GetHeightForDrag(int min_height, int* delta_y) {
301 int height = details().initial_bounds_in_parent.height();
302 if (details().size_change_direction & kBoundsChangeDirection_Vertical) {
303 // Along the bottom edge, positive delta_y increases the window size.
304 int y_multiplier = IsBottomEdge(details().window_component) ? 1 : -1;
305 height += y_multiplier * (*delta_y);
306
307 // Ensure we don't shrink past the minimum height and clamp delta_y
308 // for the window origin computation.
309 if (height < min_height) {
310 height = min_height;
311 *delta_y = -y_multiplier *
312 (details().initial_bounds_in_parent.height() - min_height);
313 }
314
315 // And don't let the window go bigger than the display.
316 int max_height = GetTarget()->GetDisplayNearestWindow().bounds().height();
317 gfx::Size max_size = GetTarget()->GetMaximumSize();
318 if (max_size.height() != 0)
319 max_height = std::min(max_height, max_size.height());
320 if (height > max_height) {
321 height = max_height;
322 *delta_y = -y_multiplier *
323 (details().initial_bounds_in_parent.height() - max_height);
324 }
325 }
326 return height;
327 }
328
329 } // namespace ash
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