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/*
* Copyright (c) 2019 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#ifndef MODULES_DESKTOP_CAPTURE_LINUX_X11_X_WINDOW_PROPERTY_H_
#define MODULES_DESKTOP_CAPTURE_LINUX_X11_X_WINDOW_PROPERTY_H_
#include <X11/X.h>
#include <X11/Xlib.h>
namespace webrtc {
class XWindowPropertyBase {
public:
XWindowPropertyBase(Display* display,
Window window,
Atom property,
int expected_size);
virtual ~XWindowPropertyBase();
XWindowPropertyBase(const XWindowPropertyBase&) = delete;
XWindowPropertyBase& operator=(const XWindowPropertyBase&) = delete;
// True if we got properly value successfully.
bool is_valid() const { return is_valid_; }
// Size and value of the property.
size_t size() const { return size_; }
protected:
unsigned char* data_ = nullptr;
private:
bool is_valid_ = false;
unsigned long size_ = 0; // NOLINT: type required by XGetWindowProperty
};
// Convenience wrapper for XGetWindowProperty() results.
template <class PropertyType>
class XWindowProperty : public XWindowPropertyBase {
public:
XWindowProperty(Display* display, const Window window, const Atom property)
: XWindowPropertyBase(display, window, property, sizeof(PropertyType)) {}
~XWindowProperty() override = default;
XWindowProperty(const XWindowProperty&) = delete;
XWindowProperty& operator=(const XWindowProperty&) = delete;
const PropertyType* data() const {
return reinterpret_cast<PropertyType*>(data_);
}
PropertyType* data() { return reinterpret_cast<PropertyType*>(data_); }
};
} // namespace webrtc
#endif // MODULES_DESKTOP_CAPTURE_LINUX_X11_X_WINDOW_PROPERTY_H_
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