client: support clipboard/selection-owner model (v2)

-includes most of Hans' review fixes (up to the SelectionRequest comment [4]) & X11 wips sent by Hans (10x!)
-use the VD_AGENT_CLIPBOARD_* types in the platform code
-add ifs for VD_AGENT_CAP_CLIPBOARD_BY_DEMAND in both sides
-support the GRAB/REQUEST/DATA/RELEASE verbs in both ways
-pasting clipboard data is now "only-by-demand" from both sides (client and agent), whose behavior is symmetric
-client and agent don't read or send the contents of the clipboard unnecessarily (e.g. copy, internal paste, repeating paste, focus change)
-set client as clipboard listener instead of application
-add atexit(cleanup) in win platform

linux:
-instead of clipboard atom selection instead of XA_PRIMARY
-enable USE_XRANDR_1_2 and support clipboard in MultyMonScreen
-send utf8 with no null termination, remove ++size
-add xfixes in configure.ac & Makefile.am

windows:
-bonus: support image cut & paste, currently only on windows

not done yet:
-clipboards formats are still uint32_t, not mime types stores as strings
-platform_win is still used, not the root window
-not replaced the ugly windows CF_DIB in agent/winclient

1 files changed, 24 insertions, 6 deletions

diff --git a/client/red_client.h b/client/red_client.h
index ba8b4ee9..3ccb8e32 100644
--- a/client/red_client.h
+++ b/client/red_client.h
@@ -144,16 +144,31 @@ public:
     uint32_t _color_depth;
 };
 
-class ClipboardEvent : public Event {
+class ClipboardGrabEvent : public Event {
 public:
+    ClipboardGrabEvent(uint32_t type) : _type (type) {}
     virtual void response(AbstractProcessLoop& events_loop);
+
+private:
+    uint32_t _type;
 };
 
-class RedClient: public RedChannel {
+class ClipboardRequestEvent : public Event {
+public:
+    ClipboardRequestEvent(uint32_t type) : _type (type) {}
+    virtual void response(AbstractProcessLoop& events_loop);
+
+private:
+    uint32_t _type;
+};
+
+class RedClient: public RedChannel,
+                 public Platform::ClipboardListener {
 public:
     friend class RedChannel;
     friend class Migrate;
-    friend class ClipboardEvent;
+    friend class ClipboardGrabEvent;
+    friend class ClipboardRequestEvent;
 
     RedClient(Application& application);
     ~RedClient();
@@ -192,7 +207,10 @@ public:
     PixmapCache& get_pixmap_cache() {return _pixmap_cache;}
     uint64_t get_pixmap_cache_size() { return _pixmap_cache_size;}
     void on_display_mode_change();
-    void on_clipboard_change();
+    void on_clipboard_grab(uint32_t type);
+    void on_clipboard_request(uint32_t type);
+    void on_clipboard_notify(uint32_t type, uint8_t* data, int32_t size);
+
     void for_each_channel(ForEachChannelFunc& func);
     void on_mouse_capture_trigger(RedScreen& screen);
 
@@ -228,13 +246,13 @@ private:
     void handle_agent_data(RedPeer::InMessage* message);
     void handle_agent_tokens(RedPeer::InMessage* message);
     void handle_migrate_switch_host(RedPeer::InMessage* message);
+    void dispatch_agent_message(VDAgentMessage* msg, void* data);
 
     void on_agent_reply(VDAgentReply* reply);
     void on_agent_announce_capabilities(VDAgentAnnounceCapabilities* caps,
                                         uint32_t msg_size);
-    void on_agent_clipboard(VDAgentClipboard* clipboard, uint32_t size);
-    void send_agent_clipboard();
     void do_send_agent_clipboard();
+    void send_agent_clipboard_message(uint32_t message_type, uint32_t size = 0, void* data = NULL);
 
     ChannelFactory* find_factory(uint32_t type);
     void create_channel(uint32_t type, uint32_t id);