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electron_desktop_window_tree_host_win.cc
92 lines (81 loc) · 3.91 KB
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electron_desktop_window_tree_host_win.cc
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// Copyright (c) 2015 GitHub, Inc.
// Use of this source code is governed by the MIT license that can be
// found in the LICENSE file.
#include "shell/browser/ui/win/electron_desktop_window_tree_host_win.h"
#include "base/win/windows_version.h"
#include "shell/browser/ui/views/win_frame_view.h"
#include "ui/base/win/hwnd_metrics.h"
#include "ui/base/win/shell.h"
#include "ui/display/win/screen_win.h"
#include "ui/views/win/hwnd_util.h"
namespace electron {
ElectronDesktopWindowTreeHostWin::ElectronDesktopWindowTreeHostWin(
NativeWindowViews* native_window_view,
views::DesktopNativeWidgetAura* desktop_native_widget_aura)
: views::DesktopWindowTreeHostWin(native_window_view->widget(),
desktop_native_widget_aura),
native_window_view_(native_window_view) {}
ElectronDesktopWindowTreeHostWin::~ElectronDesktopWindowTreeHostWin() {}
bool ElectronDesktopWindowTreeHostWin::PreHandleMSG(UINT message,
WPARAM w_param,
LPARAM l_param,
LRESULT* result) {
return native_window_view_->PreHandleMSG(message, w_param, l_param, result);
}
bool ElectronDesktopWindowTreeHostWin::ShouldPaintAsActive() const {
// Tell Chromium to use system default behavior when rendering inactive
// titlebar, otherwise it would render inactive titlebar as active under
// some cases.
// See also https://github.com/electron/electron/issues/24647.
return false;
}
bool ElectronDesktopWindowTreeHostWin::HasNativeFrame() const {
// Since we never use chromium's titlebar implementation, we can just say
// that we use a native titlebar. This will disable the repaint locking when
// DWM composition is disabled.
return !ui::win::IsAeroGlassEnabled();
}
bool ElectronDesktopWindowTreeHostWin::GetDwmFrameInsetsInPixels(
gfx::Insets* insets) const {
if (IsMaximized() && !native_window_view_->has_frame()) {
HMONITOR monitor = ::MonitorFromWindow(
native_window_view_->GetAcceleratedWidget(), MONITOR_DEFAULTTONEAREST);
int frame_height = display::win::ScreenWin::GetSystemMetricsForMonitor(
monitor, SM_CYSIZEFRAME) +
display::win::ScreenWin::GetSystemMetricsForMonitor(
monitor, SM_CXPADDEDBORDER);
int frame_size = base::win::GetVersion() < base::win::Version::WIN8
? display::win::ScreenWin::GetSystemMetricsForMonitor(
monitor, SM_CXSIZEFRAME)
: 0;
insets->Set(frame_height, frame_size, frame_size, frame_size);
return true;
}
return false;
}
bool ElectronDesktopWindowTreeHostWin::GetClientAreaInsets(
gfx::Insets* insets,
HMONITOR monitor) const {
if (IsMaximized() && !native_window_view_->has_frame()) {
if (base::win::GetVersion() < base::win::Version::WIN8) {
// This tells Windows that most of the window is a client area, meaning
// Chrome will draw it. Windows still fills in the glass bits because of
// the // DwmExtendFrameIntoClientArea call in |UpdateDWMFrame|.
// Without this 1 pixel offset on the right and bottom:
// * windows paint in a more standard way, and
// * we get weird black bars at the top when maximized in multiple
// monitor configurations.
int border_thickness = 1;
insets->Set(0, 0, border_thickness, border_thickness);
} else {
const int frame_thickness = ui::GetFrameThickness(monitor);
// Reduce the Windows non-client border size because we extend the border
// into our client area in UpdateDWMFrame(). The top inset must be 0 or
// else Windows will draw a full native titlebar outside the client area.
insets->Set(0, frame_thickness, frame_thickness, frame_thickness);
}
return true;
}
return false;
}
} // namespace electron