[PATCH vdagent-win 12/12] seamless-mode: Add support for window changes

[Jakub Janků <janku.jakub.jj@xxxxxxxxx>]

Send VD_AGENT_SEAMLESS_MODE_CHANGE message to client instead of the whole
list of windows. The message contains VDAgentSeamlessModeWindow struct with
window's coordinates and its id (HWND). Zero width indicates the window is
not visible anymore.

This improves performance as the agent doesn't have to cycle through all the
windows.
---
 spice-protocol      |  2 +-
 vdagent/vdagent.cpp | 16 +++++++++++++++-
 2 files changed, 16 insertions(+), 2 deletions(-)

diff --git a/spice-protocol b/spice-protocol
index 05007f2..a12b1eb 160000
--- a/spice-protocol
+++ b/spice-protocol
@@ -1 +1 @@
-Subproject commit 05007f21759bf1227cc965a05bcafb7fba375830
+Subproject commit a12b1ebd6fefb5829b759b3038b38d0f4bbda380
diff --git a/vdagent/vdagent.cpp b/vdagent/vdagent.cpp
index 5c5f8f4..504208e 100644
--- a/vdagent/vdagent.cpp
+++ b/vdagent/vdagent.cpp
@@ -1363,6 +1363,8 @@ void VDAgent::set_seamless_mode(uint8_t enabled)
                                                    EVENT_OBJECT_UNCLOAKED,
                                                    NULL, wnd_event_proc, 0, 0,
                                                    WINEVENT_OUTOFCONTEXT | WINEVENT_SKIPOWNPROCESS);
+
+        send_seamless_mode_list();
     } else {
         UnhookWinEvent(_win_change_hooks[0]);
         _win_change_hooks[0] = NULL;
@@ -1383,6 +1385,7 @@ void CALLBACK VDAgent::wnd_event_proc(HWINEVENTHOOK hWinEventHook, DWORD event,
                                       LONG idObject, LONG idChild, DWORD dwEventThread,
                                       DWORD dwmsEventTime)
 {
+    VDAgentSeamlessModeWindow win;
     LONG_PTR style;
 
     if (idObject != OBJID_WINDOW || hwnd == NULL)
@@ -1392,17 +1395,27 @@ void CALLBACK VDAgent::wnd_event_proc(HWINEVENTHOOK hWinEventHook, DWORD event,
     if (style & WS_CHILD)
         return;
 
+    if (IsIconic(hwnd))
+        event = EVENT_OBJECT_HIDE;
+
     switch (event) {
         case EVENT_OBJECT_LOCATIONCHANGE:
         case EVENT_OBJECT_CREATE:
         case EVENT_OBJECT_SHOW:
         case EVENT_OBJECT_UNCLOAKED:
+            if (!_singleton->is_window_relevant(hwnd))
+                return;
+            _singleton->set_seamless_win_params(&win, hwnd);
+            break;
         case EVENT_OBJECT_DESTROY:
         case EVENT_OBJECT_HIDE:
         case EVENT_OBJECT_CLOAKED:
-            _singleton->send_seamless_mode_list();
+            win.w = 0;
+            win.id = (uint64_t)hwnd;
             break;
     }
+
+    _singleton->write_message(VD_AGENT_SEAMLESS_MODE_CHANGE, sizeof(win), &win);
 }
 
 void VDAgent::send_seamless_mode_list()
@@ -1461,6 +1474,7 @@ void VDAgent::set_seamless_win_params(VDAgentSeamlessModeWindow *win, HWND hwnd)
     win->h = rect.bottom - rect.top;
     win->x = rect.left;
     win->y = rect.top;
+    win->id = (uint64_t)hwnd;
 }
 
 /* determines whether the window should be shown to user in seamless-mode
-- 
2.13.4

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