blob: e2b3b5a2910e73a610ad78fa83589c66a8173f61 (
plain)
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
|
// Copyright 2020 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 "ui/views/widget/desktop_aura/desktop_screen.h"
#include "base/notreached.h"
#include "ui/ozone/public/platform_screen.h"
#include "ui/views/linux_ui/device_scale_factor_observer.h"
#include "ui/views/linux_ui/linux_ui.h"
#include "ui/views/widget/desktop_aura/desktop_screen_ozone.h"
namespace views {
// Listens to device scale factor changes that can be provided via "external" to
// Ozone sources such as toolkits, etc, and provides Ozone with new values.
class DesktopScreenOzoneLinux : public DesktopScreenOzone,
public DeviceScaleFactorObserver {
public:
DesktopScreenOzoneLinux() = default;
~DesktopScreenOzoneLinux() override = default;
private:
// DeviceScaleFactorObserver:
void OnDeviceScaleFactorChanged() override {
SetDeviceScaleFactorToPlatformScreen(
LinuxUI::instance()->GetDeviceScaleFactor());
}
void SetDeviceScaleFactorToPlatformScreen(float scale_factor) {
platform_screen()->SetDeviceScaleFactor(scale_factor);
}
// ScreenOzone:
//
// Linux/Ozone/X11 must get scale factor from LinuxUI before displays are
// fetched. X11ScreenOzone fetches lists of displays synchronously only on the
// first initialization. Later, when it gets a notification about scale factor
// changes, displays are updated via a task, which results in a first
// PlatformWindow created with wrong bounds translated from DIP to px. Thus,
// set the display scale factor as early as possible so that list of displays
// have correct scale factor from the beginning.
void OnBeforePlatformScreenInit() override {
auto* linux_ui = LinuxUI::instance();
if (linux_ui) {
display_scale_factor_observer_.Observe(linux_ui);
// Send current scale factor as starting to observe doesn't actually
// result in getting a OnDeviceScaleFactorChanged call.
SetDeviceScaleFactorToPlatformScreen(linux_ui->GetDeviceScaleFactor());
}
}
base::ScopedObservation<LinuxUI,
DeviceScaleFactorObserver,
&LinuxUI::AddDeviceScaleFactorObserver,
&LinuxUI::RemoveDeviceScaleFactorObserver>
display_scale_factor_observer_{this};
};
std::unique_ptr<display::Screen> CreateDesktopScreen() {
auto screen = std::make_unique<DesktopScreenOzoneLinux>();
screen->Initialize();
return screen;
}
} // namespace views
|
