1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
|
// Copyright (c) 2012 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "chrome/browser/ui/views/ash/window_positioner.h"
#include "ash/shell.h"
#include "ash/wm/window_cycle_controller.h"
#include "ash/wm/window_resizer.h"
#include "ash/wm/window_util.h"
#include "ui/aura/window.h"
#include "ui/aura/window_delegate.h"
#include "ui/compositor/layer.h"
#include "ui/gfx/screen.h"
WindowPositioner::WindowPositioner()
: pop_position_offset_increment_x(0),
pop_position_offset_increment_y(0),
popup_position_offset_from_screen_corner_x(0),
popup_position_offset_from_screen_corner_y(0),
last_popup_position_x_(0),
last_popup_position_y_(0) {
}
WindowPositioner::~WindowPositioner() {
}
gfx::Rect WindowPositioner::GetPopupPosition(const gfx::Rect& old_pos) {
int grid = ash::Shell::GetInstance()->GetGridSize();
// Make sure that the grid has a minimum resolution of 10 pixels.
if (!grid) {
grid = 10;
} else {
while (grid < 10)
grid *= 2;
}
popup_position_offset_from_screen_corner_x = grid;
popup_position_offset_from_screen_corner_y = grid;
if (!pop_position_offset_increment_x) {
// When the popup position increment is , the last popup position
// was not yet initialized.
last_popup_position_x_ = popup_position_offset_from_screen_corner_x;
last_popup_position_y_ = popup_position_offset_from_screen_corner_y;
}
pop_position_offset_increment_x = grid;
pop_position_offset_increment_y = grid;
// We handle the Multi monitor support by retrieving the active window's
// work area.
aura::Window* window = ash::wm::GetActiveWindow();
const gfx::Rect work_area = window && window->IsVisible() ?
gfx::Screen::GetMonitorNearestWindow(window).work_area() :
gfx::Screen::GetPrimaryMonitor().work_area();
// Only try to reposition the popup when it is not spanning the entire
// screen.
if ((old_pos.width() + popup_position_offset_from_screen_corner_x >=
work_area.width()) ||
(old_pos.height() + popup_position_offset_from_screen_corner_y >=
work_area.height()))
return AlignPopupPosition(old_pos, work_area, grid);
const gfx::Rect result = SmartPopupPosition(old_pos, work_area, grid);
if (!result.IsEmpty())
return AlignPopupPosition(result, work_area, grid);
return NormalPopupPosition(old_pos, work_area);
}
gfx::Rect WindowPositioner::NormalPopupPosition(
const gfx::Rect& old_pos,
const gfx::Rect& work_area) {
int w = old_pos.width();
int h = old_pos.height();
// Note: The 'last_popup_position' is checked and kept relative to the
// screen size. The offsetting will be done in the last step when the
// target rectangle gets returned.
bool reset = false;
if (last_popup_position_y_ + h > work_area.height() ||
last_popup_position_x_ + w > work_area.width()) {
// Popup does not fit on screen. Reset to next diagonal row.
last_popup_position_x_ -= last_popup_position_y_ -
popup_position_offset_from_screen_corner_x -
pop_position_offset_increment_x;
last_popup_position_y_ = popup_position_offset_from_screen_corner_y;
reset = true;
}
if (last_popup_position_x_ + w > work_area.width()) {
// Start again over.
last_popup_position_x_ = popup_position_offset_from_screen_corner_x;
last_popup_position_y_ = popup_position_offset_from_screen_corner_y;
reset = true;
}
int x = last_popup_position_x_;
int y = last_popup_position_y_;
if (!reset) {
last_popup_position_x_ += pop_position_offset_increment_x;
last_popup_position_y_ += pop_position_offset_increment_y;
}
return gfx::Rect(x + work_area.x(), y + work_area.y(), w, h);
}
gfx::Rect WindowPositioner::SmartPopupPosition(
const gfx::Rect& old_pos,
const gfx::Rect& work_area,
int grid) {
const std::vector<aura::Window*> windows =
ash::WindowCycleController::BuildWindowList();
std::vector<gfx::Rect> regions;
// Process the window list and check if we can bail immediately.
for (size_t i = 0; i < windows.size(); i++) {
// We only include opaque and visible windows.
if (windows[i] && windows[i]->IsVisible() && windows[i]->layer() &&
(!windows[i]->transparent() ||
windows[i]->layer()->GetTargetOpacity() == 1.0)) {
// When any window is maximized we cannot find any free space.
if (ash::wm::IsWindowMaximized(windows[i]) ||
ash::wm::IsWindowFullscreen(windows[i]))
return gfx::Rect(0, 0, 0, 0);
if (ash::wm::IsWindowNormal(windows[i]))
regions.push_back(windows[i]->bounds());
}
}
if (regions.empty())
return gfx::Rect(0, 0, 0, 0);
int w = old_pos.width();
int h = old_pos.height();
int x_end = work_area.width() / 2;
int x, x_increment;
// We parse for a proper location on the screen. We do this in two runs:
// The first run will start from the left, parsing down, skipping any
// overlapping windows it will encounter until the popup's height can not
// be served anymore. Then the next grid position to the right will be
// taken, and the same cycle starts again. This will be repeated until we
// hit the middle of the screen (or we find a suitable location).
// In the second run we parse beginning from the right corner downwards and
// then to the left.
// When no location was found, an empty rectangle will be returned.
for (int run = 0; run < 2; run++) {
if (run == 0) { // First run: Start left, parse right till mid screen.
x = 0;
x_increment = pop_position_offset_increment_x;
} else { // Second run: Start right, parse left till mid screen.
x = work_area.width() - w;
x_increment = -pop_position_offset_increment_x;
}
// Note: The passing (x,y,w,h) window is always relative to the work area's
// origin.
for (; x_increment > 0 ? (x < x_end) : (x > x_end); x += x_increment) {
int y = 0;
while (y + h <= work_area.height()) {
size_t i;
for (i = 0; i < regions.size(); i++) {
if (regions[i].Intersects(gfx::Rect(x + work_area.x(),
y + work_area.y(), w, h))) {
y = regions[i].bottom() - work_area.y();
if (grid > 1) {
// Align to the (next) grid step.
y = ash::WindowResizer::AlignToGridRoundUp(y, grid);
}
break;
}
}
if (i >= regions.size())
return gfx::Rect(x + work_area.x(), y + work_area.y(), w, h);
}
}
}
return gfx::Rect(0, 0, 0, 0);
}
gfx::Rect WindowPositioner::AlignPopupPosition(
const gfx::Rect& pos,
const gfx::Rect& work_area,
int grid) {
if (grid <= 1)
return pos;
int x = pos.x() - (pos.x() - work_area.x()) % grid;
int y = pos.y() - (pos.y() - work_area.y()) % grid;
int w = pos.width();
int h = pos.height();
// If the alignment was pushing the window out of the screen, we ignore the
// alignment for that call.
if (abs(pos.right() - work_area.right()) < grid)
x = work_area.right() - w;
if (abs(pos.bottom() - work_area.bottom()) < grid)
y = work_area.bottom() - h;
return gfx::Rect(x, y, w, h);
}
|
