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// 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.
#ifndef UI_BASE_X_X11_CURSOR_LOADER_H_
#define UI_BASE_X_X11_CURSOR_LOADER_H_
#include <unordered_map>
#include "base/component_export.h"
#include "base/memory/ref_counted_memory.h"
#include "base/memory/scoped_refptr.h"
#include "base/memory/weak_ptr.h"
#include "base/version.h"
#include "third_party/skia/include/core/SkBitmap.h"
#include "ui/base/x/x11_cursor.h"
#include "ui/gfx/geometry/point.h"
#include "ui/gfx/x/render.h"
#include "ui/gfx/x/xproto.h"
namespace ui {
// This is a port of libxcursor.
class COMPONENT_EXPORT(UI_BASE_X) XCursorLoader {
public:
struct Image {
SkBitmap bitmap;
gfx::Point hotspot;
int frame_delay_ms;
};
explicit XCursorLoader(x11::Connection* connection);
~XCursorLoader();
// Loads a system cursor for the given |names|. The cursor is loaded
// asynchronously, but some cursor (possibly a fallback) is always guaranteed
// to be loaded.
scoped_refptr<X11Cursor> LoadCursor(const std::vector<std::string>& names);
// Synchronously loads a cursor for the given |bitmap| or |images|. nullptr
// may be returned if image cursors are not supported.
scoped_refptr<X11Cursor> CreateCursor(const std::vector<Image>& images);
scoped_refptr<X11Cursor> CreateCursor(const SkBitmap& bitmap,
const gfx::Point& hotspot);
private:
friend class XCursorLoaderTest;
void LoadCursorImpl(scoped_refptr<X11Cursor> cursor,
const std::vector<std::string>& names,
const std::vector<XCursorLoader::Image>& images);
uint32_t GetPreferredCursorSize() const;
// Populate the |rm_*| variables from the value of the RESOURCE_MANAGER
// property on the root window.
void ParseXResources(const std::string& resources);
uint16_t CursorNamesToChar(const std::vector<std::string>& names) const;
bool SupportsCreateCursor() const;
bool SupportsCreateAnimCursor() const;
x11::Connection* connection_ = nullptr;
x11::Font cursor_font_ = x11::Font::None;
x11::Render::PictFormat pict_format_{};
// Values obtained from the RESOURCE_MANAGER property on the root window.
std::string rm_xcursor_theme_;
unsigned int rm_xcursor_size_ = 0;
unsigned int rm_xft_dpi_ = 0;
base::Version render_version_;
std::unordered_map<std::string, uint16_t> cursor_name_to_char_;
SEQUENCE_CHECKER(sequence_checker_);
base::WeakPtrFactory<XCursorLoader> weak_factory_{this};
};
COMPONENT_EXPORT(UI_BASE_X)
std::vector<XCursorLoader::Image> ParseCursorFile(
scoped_refptr<base::RefCountedMemory> file,
uint32_t preferred_size);
} // namespace ui
#endif // UI_BASE_X_X11_CURSOR_LOADER_H_
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