i3 - improved tiling WM

Suppport _NET_WM_MOVERESIZE

Patch status: needinfo

Patch by Lukas K

Long description:

fixes #1432

To apply this patch, use:
curl http://cr.i3wm.org/patch/699/raw.patch | git am

b/include/atoms.xmacro

15 
@@ -1,6 +1,7 @@
16 
 xmacro(_NET_SUPPORTED)
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 xmacro(_NET_SUPPORTING_WM_CHECK)
18 
 xmacro(_NET_WM_NAME)
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+xmacro(_NET_WM_MOVERESIZE)
20 
 xmacro(_NET_WM_STATE_FULLSCREEN)
21 
 xmacro(_NET_WM_STATE_DEMANDS_ATTENTION)
22 
 xmacro(_NET_WM_STATE_MODAL)

b/src/handlers.c

27 
@@ -651,6 +651,20 @@ static void handle_expose_event(xcb_expose_event_t *event) {
28 
     return;
29 
 }
30
31 
+
32 
+#define _NET_WM_MOVERESIZE_SIZE_TOPLEFT      0
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+#define _NET_WM_MOVERESIZE_SIZE_TOP          1
34 
+#define _NET_WM_MOVERESIZE_SIZE_TOPRIGHT     2
35 
+#define _NET_WM_MOVERESIZE_SIZE_RIGHT        3
36 
+#define _NET_WM_MOVERESIZE_SIZE_BOTTOMRIGHT  4
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+#define _NET_WM_MOVERESIZE_SIZE_BOTTOM       5
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+#define _NET_WM_MOVERESIZE_SIZE_BOTTOMLEFT   6
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+#define _NET_WM_MOVERESIZE_SIZE_LEFT         7
40 
+#define _NET_WM_MOVERESIZE_MOVE              8   /* movement only */
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+#define _NET_WM_MOVERESIZE_SIZE_KEYBOARD     9   /* size via keyboard */
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+#define _NET_WM_MOVERESIZE_MOVE_KEYBOARD    10   /* move via keyboard */
43 
+#define _NET_WM_MOVERESIZE_CANCEL           11   /* cancel operation */
44 
+
45 
 /*
46 
  * Handle client messages (EWMH)
47 
  *
48 
@@ -856,6 +870,33 @@ static void handle_client_message(xcb_client_message_event_t *event) {
49 
         } else {
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             DLOG("Couldn't find con for _NET_CLOSE_WINDOW request. (window = %d)\n", event->window);
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         }
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+    }
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+    else if (event->type == A__NET_WM_MOVERESIZE) {
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+        /*
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+         * Client-side decorated Gtk3 windows emit this signal when being
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+         * dragged by their GtkHeaderBar
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+         */
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+         Con *con = con_by_window_id(event->window);
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+         if (con && con_is_floating(con)) {
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+             DLOG("Handling _NET_WM_MOVERESIZE request (con = %p)\n", con);
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+             uint32_t direction = event->data.data32[2];
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+             uint32_t x_root = event->data.data32[0];
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+             uint32_t y_root = event->data.data32[1];
64 
+             if(direction == _NET_WM_MOVERESIZE_MOVE) {
65 
+                 /* construct fake xcb_button_press_event_t */
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+                 xcb_button_press_event_t fake = {
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+                     .root_x = x_root,
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+                     .root_y = y_root
69 
+                 };
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+                 floating_drag_window(con->parent, &fake);
71 
+
72 
+             } else {
73 
+                DLOG("_NET_WM_MOVERESIZE direction %d not implemented\n", direction);
74 
+             }
75 
+
76 
+         } else {
77 
+             DLOG("Couldn't find con for _NET_WM_MOVERESIZE request. or con not floating (window = %d)\n", event->window);
78 
+         }
79 
     } else {
80 
         DLOG("unhandled clientmessage\n");
81 
         return;