cef/libcef/browser/views/view_util_aura.cc

140 lines
4.5 KiB
C++

// Copyright 2016 The Chromium Embedded Framework 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 "libcef/browser/views/view_util.h"
#include "ui/aura/window.h"
#include "ui/aura/window_tree_host.h"
#include "ui/views/view_constants_aura.h"
#include "ui/views/widget/native_widget.h"
#include "ui/views/widget/native_widget_delegate.h"
#include "ui/views/widget/widget.h"
#if BUILDFLAG(IS_WIN)
#include <dwmapi.h>
#include "base/win/windows_version.h"
#include "ui/views/win/hwnd_util.h"
#endif
namespace view_util {
gfx::NativeWindow GetNativeWindow(views::Widget* widget) {
if (widget) {
return widget->GetNativeWindow();
}
return nullptr;
}
gfx::NativeView GetNativeView(views::Widget* widget) {
if (widget) {
return widget->GetNativeView();
}
return nullptr;
}
CefWindowHandle GetWindowHandle(views::Widget* widget) {
// Same implementation as views::HWNDForView() but cross-platform.
if (widget) {
return GetWindowHandle(widget->GetNativeWindow());
}
return kNullWindowHandle;
}
CefWindowHandle GetWindowHandle(gfx::NativeWindow window) {
// |window| is an aura::Window*.
if (window && window->GetRootWindow()) {
return window->GetHost()->GetAcceleratedWidget();
}
return kNullWindowHandle;
}
views::NativeWidget* CreateNativeWidget(
views::internal::NativeWidgetDelegate* delegate,
CefRefPtr<CefWindow> window,
CefWindowDelegate* window_delegate) {
return nullptr;
}
void SetHostView(views::Widget* widget, views::View* host_view) {
widget->GetNativeView()->SetProperty(views::kHostViewKey, host_view);
}
views::View* GetHostView(const views::Widget* widget) {
return widget->GetNativeView()->GetProperty(views::kHostViewKey);
}
void UpdateTitlebarTheme(views::Widget* widget) {
#if BUILDFLAG(IS_WIN)
// Value was 19 prior to Windows 10 20H1, according to
// https://stackoverflow.com/a/70693198
const DWORD dwAttribute =
base::win::GetVersion() >= base::win::Version::WIN10_20H1
? DWMWA_USE_IMMERSIVE_DARK_MODE
: 19;
const HWND widget_hwnd = views::HWNDForWidget(widget);
BOOL has_dark_titlebar = FALSE;
DwmGetWindowAttribute(widget_hwnd, dwAttribute, &has_dark_titlebar,
sizeof(has_dark_titlebar));
const BOOL dark_titlebar_enabled = ShouldUseDarkTheme(widget);
if (has_dark_titlebar == dark_titlebar_enabled) {
// No change required.
return;
}
// From BrowserFrameViewWin::SetSystemMicaTitlebarAttributes.
DwmSetWindowAttribute(widget_hwnd, dwAttribute, &dark_titlebar_enabled,
sizeof(dark_titlebar_enabled));
// Repaint the titlebar if the Widget is visible. None of the usual NC
// repaint techniques work with DwmSetWindowAttribute so use a workaround
// that nudges the window width.
// See https://stackoverflow.com/a/78269906/23991994
if (IsWindowVisible(widget_hwnd) && !IsIconic(widget_hwnd)) {
RECT rect = {};
::GetWindowRect(widget_hwnd, &rect);
if (IsZoomed(widget_hwnd)) {
// Window is currently maximized. Restore and then re-maximize the
// window. The restore position is changed temporarily to make the
// update less noticeable.
WINDOWPLACEMENT placement = {};
GetWindowPlacement(widget_hwnd, &placement);
const RECT oldrect = placement.rcNormalPosition;
placement.rcNormalPosition = rect;
placement.rcNormalPosition.right -= 1;
SetWindowPlacement(widget_hwnd, &placement);
LockWindowUpdate(widget_hwnd);
ShowWindow(widget_hwnd, SW_SHOWNORMAL);
ShowWindow(widget_hwnd, SW_SHOWMAXIMIZED);
LockWindowUpdate(nullptr);
placement.rcNormalPosition = oldrect;
SetWindowPlacement(widget_hwnd, &placement);
} else {
// Window is currently normal. Change and then restore the window width.
// Use Defer functions to make the update less noticeable.
HDWP defer = BeginDeferWindowPos(2);
DeferWindowPos(defer, widget_hwnd, NULL, 0, 0, rect.right - rect.left - 1,
rect.bottom - rect.top,
SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);
DeferWindowPos(defer, widget_hwnd, NULL, 0, 0, rect.right - rect.left,
rect.bottom - rect.top,
SWP_NOZORDER | SWP_NOMOVE | SWP_NOACTIVATE);
LockWindowUpdate(widget_hwnd);
EndDeferWindowPos(defer);
LockWindowUpdate(nullptr);
}
}
#endif // BUILDFLAG(IS_WIN)
}
} // namespace view_util