| // Copyright (c) 2011 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 BASE_MESSAGE_PUMP_X_H |
| #define BASE_MESSAGE_PUMP_X_H |
| |
| #include "base/message_pump.h" |
| #include "base/message_pump_glib.h" |
| #include "base/message_pump_observer.h" |
| |
| #include <bitset> |
| |
| #include <glib.h> |
| |
| typedef struct _XDisplay Display; |
| |
| namespace base { |
| |
| // The documentation for this class is in message_pump_glib.h |
| // |
| // The nested loop is exited by either posting a quit, or returning EVENT_QUIT |
| // from Dispatch. |
| class MessagePumpDispatcher { |
| public: |
| enum DispatchStatus { |
| EVENT_IGNORED, // The event was not processed. |
| EVENT_PROCESSED, // The event has been processed. |
| EVENT_QUIT // The event was processed and the message-loop should |
| // terminate. |
| }; |
| |
| // Dispatches the event. EVENT_IGNORED is returned if the event was ignored |
| // (i.e. not processed). EVENT_PROCESSED is returned if the event was |
| // processed. The nested loop exits immediately if EVENT_QUIT is returned. |
| virtual DispatchStatus Dispatch(XEvent* xevent) = 0; |
| |
| protected: |
| virtual ~MessagePumpDispatcher() {} |
| }; |
| |
| // This class implements a message-pump for dispatching X events. |
| class BASE_EXPORT MessagePumpX : public MessagePumpGlib { |
| public: |
| MessagePumpX(); |
| virtual ~MessagePumpX(); |
| |
| // Returns default X Display. |
| static Display* GetDefaultXDisplay(); |
| |
| // Returns true if the system supports XINPUT2. |
| static bool HasXInput2(); |
| |
| // Sets the default dispatcher to process native events. |
| static void SetDefaultDispatcher(MessagePumpDispatcher* dispatcher); |
| |
| // Internal function. Called by the glib source dispatch function. Processes |
| // all available X events. |
| gboolean DispatchXEvents(); |
| |
| private: |
| // Initializes the glib event source for X. |
| void InitXSource(); |
| |
| // Dispatches the XEvent and returns true if we should exit the current loop |
| // of message processing. |
| bool ProcessXEvent(MessagePumpDispatcher* dispatcher, XEvent* event); |
| |
| // Sends the event to the observers. If an observer returns true, then it does |
| // not send the event to any other observers and returns true. Returns false |
| // if no observer returns true. |
| bool WillProcessXEvent(XEvent* xevent); |
| void DidProcessXEvent(XEvent* xevent); |
| |
| // The event source for X events. |
| GSource* x_source_; |
| |
| DISALLOW_COPY_AND_ASSIGN(MessagePumpX); |
| }; |
| |
| typedef MessagePumpX MessagePumpForUI; |
| |
| } // namespace base |
| |
| #endif // BASE_MESSAGE_PUMP_X_H |