cef/libcef/browser/native/cursor_util_aura.cc

157 lines
4.9 KiB
C++

// Copyright 2023 The Chromium Embedded Framework Authors. Portions copyright
// 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 "libcef/browser/native/cursor_util.h"
#include "libcef/browser/browser_host_base.h"
#include "content/common/cursors/webcursor.h"
#include "content/public/browser/render_widget_host_view.h"
#include "ui/base/cursor/cursor_factory.h"
#include "ui/base/cursor/mojom/cursor_type.mojom.h"
#include "ui/display/display.h"
#include "ui/display/display_util.h"
#include "ui/display/screen.h"
#include "ui/wm/core/cursor_loader.h"
#if BUILDFLAG(IS_LINUX)
#include "ui/base/ozone_buildflags.h"
#if BUILDFLAG(IS_OZONE_X11)
#include "ui/base/x/x11_cursor.h"
#elif BUILDFLAG(IS_OZONE)
#include "ui/ozone/common/bitmap_cursor.h"
#endif
#endif // BUILDFLAG(IS_LINUX)
#if BUILDFLAG(IS_WIN)
#include "ui/base/win/win_cursor.h"
#endif
namespace cursor_util {
namespace {
display::Display::Rotation OrientationAngleToRotation(
uint16_t orientation_angle) {
// The Display rotation and the ScreenInfo orientation are not the same
// angle. The former is the physical display rotation while the later is the
// rotation required by the content to be shown properly on the screen, in
// other words, relative to the physical display.
if (orientation_angle == 0) {
return display::Display::ROTATE_0;
}
if (orientation_angle == 90) {
return display::Display::ROTATE_270;
}
if (orientation_angle == 180) {
return display::Display::ROTATE_180;
}
if (orientation_angle == 270) {
return display::Display::ROTATE_90;
}
DCHECK(false);
return display::Display::ROTATE_0;
}
// It would be better if CursorLoader took a ScreenInfo argument.
// See https://crbug.com/1149906#c33.
display::Display GetDisplay(CefRefPtr<CefBrowser> browser) {
auto browser_impl = CefBrowserHostBase::FromBrowser(browser);
if (auto web_contents = browser_impl->GetWebContents()) {
if (auto view = web_contents->GetRenderWidgetHostView()) {
// Windowless browsers always return nullptr from GetNativeView().
if (!browser_impl->IsWindowless()) {
return display::Screen::GetScreen()->GetDisplayNearestView(
view->GetNativeView());
}
// Make a minimal-effort fake Display object to satisfy the actual usage
// by CursorLoader::SetDisplay.
display::Display fake_display;
auto screen_info = view->GetScreenInfo();
fake_display.set_device_scale_factor(screen_info.device_scale_factor);
fake_display.set_rotation(
OrientationAngleToRotation(screen_info.orientation_angle));
return fake_display;
}
}
return display::Display::GetDefaultDisplay();
}
scoped_refptr<ui::PlatformCursor> ToPlatformCursor(
CefRefPtr<CefBrowser> browser,
const ui::Cursor& ui_cursor) {
wm::CursorLoader cursor_loader;
scoped_refptr<ui::PlatformCursor> platform_cursor;
ui::Cursor loaded_cursor = ui_cursor;
if (ui_cursor.type() == ui::mojom::CursorType::kCustom) {
platform_cursor = ui::CursorFactory::GetInstance()->CreateImageCursor(
ui::mojom::CursorType::kCustom, ui_cursor.custom_bitmap(),
ui_cursor.custom_hotspot(), ui_cursor.image_scale_factor());
} else {
cursor_loader.SetDisplay(GetDisplay(browser));
// Attempts to load the cursor via the platform or from pak resources.
cursor_loader.SetPlatformCursor(&loaded_cursor);
platform_cursor = loaded_cursor.platform();
}
return platform_cursor;
}
#if BUILDFLAG(IS_WIN)
using CursorType = ui::WinCursor;
inline cef_cursor_handle_t GetCursorHandleImpl(CursorType* cursor) {
return cursor->hcursor();
}
#elif BUILDFLAG(IS_OZONE_X11)
// See https://crbug.com/1029142 for background.
using CursorType = ui::X11Cursor;
inline cef_cursor_handle_t GetCursorHandleImpl(CursorType* cursor) {
return static_cast<cef_cursor_handle_t>(cursor->xcursor());
}
#elif BUILDFLAG(IS_OZONE)
using CursorType = ui::BitmapCursor;
inline cef_cursor_handle_t GetCursorHandleImpl(CursorType* cursor) {
return static_cast<cef_cursor_handle_t>(cursor->platform_data());
}
#else
#error Unsupported platform
#endif
class ScopedCursorHandleImpl : public ScopedCursorHandle {
public:
explicit ScopedCursorHandleImpl(
scoped_refptr<ui::PlatformCursor> platform_cursor) {
if (platform_cursor) {
cursor_ = CursorType::FromPlatformCursor(platform_cursor);
}
}
cef_cursor_handle_t GetCursorHandle() override {
if (cursor_) {
return GetCursorHandleImpl(cursor_.get());
}
return kNullCursorHandle;
}
private:
scoped_refptr<CursorType> cursor_;
};
} // namespace
// static
std::unique_ptr<ScopedCursorHandle> ScopedCursorHandle::Create(
CefRefPtr<CefBrowser> browser,
const ui::Cursor& ui_cursor) {
return std::make_unique<ScopedCursorHandleImpl>(
ToPlatformCursor(browser, ui_cursor));
}
} // namespace cursor_util