1 /* 2 * Copyright (c) 2019 The WebRTC project authors. All Rights Reserved. 3 * 4 * Use of this source code is governed by a BSD-style license 5 * that can be found in the LICENSE file in the root of the source 6 * tree. An additional intellectual property rights grant can be found 7 * in the file PATENTS. All contributing project authors may 8 * be found in the AUTHORS file in the root of the source tree. 9 */ 10 11 #ifndef MODULES_DESKTOP_CAPTURE_LINUX_X11_X_WINDOW_PROPERTY_H_ 12 #define MODULES_DESKTOP_CAPTURE_LINUX_X11_X_WINDOW_PROPERTY_H_ 13 14 #include <X11/X.h> 15 #include <X11/Xlib.h> 16 17 namespace webrtc { 18 19 class XWindowPropertyBase { 20 public: 21 XWindowPropertyBase(Display* display, 22 Window window, 23 Atom property, 24 int expected_size); 25 virtual ~XWindowPropertyBase(); 26 27 XWindowPropertyBase(const XWindowPropertyBase&) = delete; 28 XWindowPropertyBase& operator=(const XWindowPropertyBase&) = delete; 29 30 // True if we got properly value successfully. is_valid()31 bool is_valid() const { return is_valid_; } 32 33 // Size and value of the property. size()34 size_t size() const { return size_; } 35 36 protected: 37 unsigned char* data_ = nullptr; 38 39 private: 40 bool is_valid_ = false; 41 unsigned long size_ = 0; // NOLINT: type required by XGetWindowProperty 42 }; 43 44 // Convenience wrapper for XGetWindowProperty() results. 45 template <class PropertyType> 46 class XWindowProperty : public XWindowPropertyBase { 47 public: XWindowProperty(Display * display,const Window window,const Atom property)48 XWindowProperty(Display* display, const Window window, const Atom property) 49 : XWindowPropertyBase(display, window, property, sizeof(PropertyType)) {} 50 ~XWindowProperty() override = default; 51 52 XWindowProperty(const XWindowProperty&) = delete; 53 XWindowProperty& operator=(const XWindowProperty&) = delete; 54 data()55 const PropertyType* data() const { 56 return reinterpret_cast<PropertyType*>(data_); 57 } data()58 PropertyType* data() { return reinterpret_cast<PropertyType*>(data_); } 59 }; 60 61 } // namespace webrtc 62 63 #endif // MODULES_DESKTOP_CAPTURE_LINUX_X11_X_WINDOW_PROPERTY_H_ 64