Add manual and by-pointer window placement

This adds a window placement preference: the existing behavior is now
called "automatic" and is the default. Two new modes are being
introduced: "pointer", which means that windows are placed according to
the mouse pointer position; and "manual" which means that the user must
manually place the new window with the mouse or keyboard.

This is a straight port from muffin, commit 3257671.

1 files changed, 52 insertions, 0 deletions

diff --git a/src/core/place.c b/src/core/place.c
index 99cedd14..bcfafe42 100644
--- a/src/core/place.c
+++ b/src/core/place.c
@@ -87,6 +87,47 @@ northwestcmp (gconstpointer a, gconstpointer b)
     return 0;
 }
 
+static gboolean
+place_by_pointer(MetaWindow *window,
+                 MetaFrameGeometry *fgeom,
+                 MetaPlacementMode placement_mode,
+                 int *new_x,
+                 int *new_y)
+{
+  int window_width, window_height;
+  Window root_return, child_return;
+  int root_x_return, root_y_return;
+  int win_x_return, win_y_return;
+  unsigned int mask_return;
+
+  XQueryPointer (window->display->xdisplay,
+                 window->screen->xroot,
+                 &root_return,
+                 &child_return,
+                 &root_x_return,
+                 &root_y_return,
+                 &win_x_return,
+                 &win_y_return,
+                 &mask_return);
+
+  window_width = window->frame ? window->frame->rect.width : window->rect.width;
+  window_height = window->frame ? window->frame->rect.height : window->rect.height;
+
+  if (fgeom) {
+    *new_x = root_x_return + fgeom->left_width - window_width / 2;
+    *new_y = root_y_return + fgeom->top_height - window_height / 2;
+  }
+  else {
+    *new_x = root_x_return - window_width / 2;
+    *new_y = root_y_return - window_height / 2;
+  }
+
+  if (placement_mode == META_PLACEMENT_MODE_MANUAL)
+    window->move_after_placement = TRUE;
+
+  return TRUE;
+}
+
 static void
 find_next_cascade (MetaWindow *window,
                    MetaFrameGeometry *fgeom,
@@ -663,6 +704,7 @@ meta_window_place (MetaWindow        *window,
 {
   GList *windows;
   const MetaXineramaScreenInfo *xi;
+  MetaPlacementMode placement_mode;
 
   /* frame member variables should NEVER be used in here, only
    * MetaFrameGeometry. But remember fgeom == NULL
@@ -853,6 +895,16 @@ meta_window_place (MetaWindow        *window,
   x = xi->rect.x;
   y = xi->rect.y;
 
+  /* Placement based on pointer position */
+  placement_mode = meta_prefs_get_placement_mode();
+
+  if (placement_mode == META_PLACEMENT_MODE_POINTER ||
+      placement_mode == META_PLACEMENT_MODE_MANUAL)
+    {
+      if (place_by_pointer (window, fgeom, placement_mode, &x, &y))
+        goto done_check_denied_focus;
+    }
+
   if (find_first_fit (window, fgeom, windows,
                       xi->number,
                       x, y, &x, &y))