[mutter] window: Move adjust_for_gravity to window-x11

[Jasper St. Pierre <jstpierre src gnome org>]

commit acb3dc675412ffdca22591d5ea3cc5ddfcb27ad3
Author: Jasper St. Pierre <jstpierre mecheye net>
Date:   Thu May 1 17:39:25 2014 -0400

    window: Move adjust_for_gravity to window-x11
    
    This removes the weirdness about which edge cases are where in the
    move_resize_internal API, and we now always pass in client top-left
    coordinates.

 src/core/window-private.h |    9 +-
 src/core/window.c         |  179 ++------------------------------------------
 src/x11/window-x11.c      |  184 ++++++++++++++++++++++++++++++++++++++-------
 3 files changed, 169 insertions(+), 203 deletions(-)
---
diff --git a/src/core/window-private.h b/src/core/window-private.h
index 837ee5e..315d303 100644
--- a/src/core/window-private.h
+++ b/src/core/window-private.h
@@ -74,11 +74,10 @@ typedef enum {
 typedef enum
 {
   META_IS_CONFIGURE_REQUEST = 1 << 0,
-  META_DO_GRAVITY_ADJUST    = 1 << 1,
-  META_IS_USER_ACTION       = 1 << 2,
-  META_IS_MOVE_ACTION       = 1 << 3,
-  META_IS_RESIZE_ACTION     = 1 << 4,
-  META_IS_WAYLAND_RESIZE    = 1 << 5
+  META_IS_USER_ACTION       = 1 << 1,
+  META_IS_MOVE_ACTION       = 1 << 2,
+  META_IS_RESIZE_ACTION     = 1 << 3,
+  META_IS_WAYLAND_RESIZE    = 1 << 4,
 } MetaMoveResizeFlags;
 
 typedef enum
diff --git a/src/core/window.c b/src/core/window.c
index 19b4c8d..73ed6b5 100644
--- a/src/core/window.c
+++ b/src/core/window.c
@@ -3625,121 +3625,6 @@ meta_window_activate_with_workspace (MetaWindow     *window,
   meta_window_activate_full (window, timestamp, META_CLIENT_TYPE_APPLICATION, workspace);
 }
 
-/* Manually fix all the weirdness explained in the big comment at the
- * beginning of meta_window_move_resize_internal() giving positions
- * expected by meta_window_constrain (i.e. positions & sizes of the
- * internal or client window).
- */
-static void
-adjust_for_gravity (MetaWindow        *window,
-                    gboolean           coords_assume_border,
-                    int                gravity,
-                    MetaRectangle     *rect)
-{
-  int ref_x, ref_y;
-  int bw;
-  int child_x, child_y;
-  int frame_width, frame_height;
-  MetaFrameBorders borders;
-
-  if (coords_assume_border)
-    bw = window->border_width;
-  else
-    bw = 0;
-
-  meta_frame_calc_borders (window->frame, &borders);
-
-  child_x = borders.visible.left;
-  child_y = borders.visible.top;
-  frame_width = child_x + rect->width + borders.visible.right;
-  frame_height = child_y + rect->height + borders.visible.bottom;
-
-  /* We're computing position to pass to window_move, which is
-   * the position of the client window (StaticGravity basically)
-   *
-   * (see WM spec description of gravity computation, but note that
-   * their formulas assume we're honoring the border width, rather
-   * than compensating for having turned it off)
-   */
-
-  /* Calculate the the reference point, which is the corner of the
-   * outer window specified by the gravity. So, NorthEastGravity
-   * would have the reference point as the top-right corner of the
-   * outer window. */
-  ref_x = rect->x;
-  ref_y = rect->y;
-
-  switch (gravity)
-    {
-    case NorthGravity:
-    case CenterGravity:
-    case SouthGravity:
-      ref_x += rect->width / 2 + bw;
-      break;
-    case NorthEastGravity:
-    case EastGravity:
-    case SouthEastGravity:
-      ref_x += rect->width + bw * 2;
-      break;
-    default:
-      break;
-    }
-
-  switch (gravity)
-    {
-    case WestGravity:
-    case CenterGravity:
-    case EastGravity:
-      ref_y += rect->height / 2 + bw;
-      break;
-    case SouthWestGravity:
-    case SouthGravity:
-    case SouthEastGravity:
-      ref_y += rect->height + bw * 2;
-      break;
-    default:
-      break;
-    }
-
-  /* Find the top-left corner of the outer window from
-   * the reference point. */
-
-  rect->x = ref_x;
-  rect->y = ref_y;
-
-  switch (gravity)
-    {
-    case NorthGravity:
-    case CenterGravity:
-    case SouthGravity:
-      rect->x -= frame_width / 2;
-      break;
-    case NorthEastGravity:
-    case EastGravity:
-    case SouthEastGravity:
-      rect->x -= frame_width;
-      break;
-    }
-
-  switch (gravity)
-    {
-    case WestGravity:
-    case CenterGravity:
-    case EastGravity:
-      rect->y -= frame_height / 2;
-      break;
-    case SouthWestGravity:
-    case SouthGravity:
-    case SouthEastGravity:
-      rect->y -= frame_height;
-      break;
-    }
-
-  /* Adjust to get the top-left corner of the inner window. */
-  rect->x += child_x;
-  rect->y += child_y;
-}
-
 /**
  * meta_window_updates_are_frozen:
  * @window: a #MetaWindow
@@ -3889,46 +3774,14 @@ meta_window_move_resize_internal (MetaWindow          *window,
                                   int                  w,
                                   int                  h)
 {
-  /* meta_window_move_resize_internal gets called with very different
-   * meanings for root_x_nw and root_y_nw.  w & h are always the area
-   * of the inner or client window (i.e. excluding the frame) and
-   * gravity is the relevant gravity associated with the request (note
-   * that gravity is ignored for move-only operations unless its
-   * e.g. a configure request).  The location is different for
-   * different cases because of how this function gets called; note
-   * that in all cases what we want to find out is the upper left
-   * corner of the position of the inner window:
-   *
-   *   Case | Called from (flags; gravity)
-   *   -----+-----------------------------------------------
-   *    1   | A resize only ConfigureRequest
-   *    1   | meta_window_resize
-   *    1   | meta_window_resize_with_gravity
-   *    2   | New window
-   *    2   | Session restore
-   *    2   | A not-resize-only ConfigureRequest/net_moveresize_window request
-   *    3   | meta_window_move
-   *    3   | meta_window_move_resize
-   *    4   | meta_window_move_resize_wayland
+  /* The rectangle here that's passed in is always the root position
+   * of the client window. For undecorated or client-decorated windows,
+   * this is the root position of the X11 window. For server-decorated
+   * windows, this is the root position of the client area of the window.
    *
-   * For each of the cases, root_x_nw and root_y_nw must be treated as follows:
-   *
-   *   (1) They should be entirely ignored; instead the previous position
-   *       and size of the window should be resized according to the given
-   *       gravity in order to determine the new position of the window.
-   *   (2) Needs to be fixed up by adjust_for_gravity() as these
-   *       coordinates are relative to some corner or side of the outer
-   *       window (except for the case of StaticGravity) and we want to
-   *       know the location of the upper left corner of the inner window.
-   *   (3) These values are already the desired position of the NW corner
-   *       of the inner window
-   *   (4) These values are already the desired position of the NW corner
-   *       of the inner window (which is also the outer window, because
-   *       we don't decorate wayland clients), and the client has acknowledged
-   *       the window size change.
+   * Similarly, the width and height passed in are in client window
+   * coordinates as well.
    */
-  gboolean is_configure_request;
-  gboolean do_gravity_adjust;
   gboolean is_user_action;
   gboolean did_placement;
   /* used for the configure request, but may not be final
@@ -3941,8 +3794,6 @@ meta_window_move_resize_internal (MetaWindow          *window,
 
   g_return_if_fail (!window->override_redirect);
 
-  is_configure_request = (flags & META_IS_CONFIGURE_REQUEST) != 0;
-  do_gravity_adjust = (flags & META_DO_GRAVITY_ADJUST) != 0;
   is_user_action = (flags & META_IS_USER_ACTION) != 0;
 
   /* The action has to be a move, a resize or the wayland client
@@ -3956,9 +3807,8 @@ meta_window_move_resize_internal (MetaWindow          *window,
   meta_window_get_client_root_coords (window, &old_rect);
 
   meta_topic (META_DEBUG_GEOMETRY,
-              "Move/resize %s to %d,%d %dx%d%s%s from %d,%d %dx%d\n",
+              "Move/resize %s to %d,%d %dx%d%s from %d,%d %dx%d\n",
               window->desc, root_x_nw, root_y_nw, w, h,
-              is_configure_request ? " (configure request)" : "",
               is_user_action ? " (user move/resize)" : "",
               old_rect.x, old_rect.y, old_rect.width, old_rect.height);
 
@@ -3986,21 +3836,6 @@ meta_window_move_resize_internal (MetaWindow          *window,
                   "Compensated for gravity in resize action; new pos %d,%d\n",
                   new_rect.x, new_rect.y);
     }
-  else if (is_configure_request || do_gravity_adjust)
-    {
-      adjust_for_gravity (window,
-                          /* configure request coords assume
-                           * the border width existed
-                           */
-                          is_configure_request,
-                          gravity,
-                          &new_rect);
-
-      meta_topic (META_DEBUG_GEOMETRY,
-                  "Compensated for configure_request/do_gravity_adjust needing "
-                  "weird positioning; new pos %d,%d\n",
-                  new_rect.x, new_rect.y);
-    }
 
   did_placement = !window->placed && window->calc_placement;
 
diff --git a/src/x11/window-x11.c b/src/x11/window-x11.c
index 2d287e6..c011f01 100644
--- a/src/x11/window-x11.c
+++ b/src/x11/window-x11.c
@@ -251,6 +251,116 @@ send_configure_notify (MetaWindow *window)
 }
 
 static void
+adjust_for_gravity (MetaWindow        *window,
+                    gboolean           coords_assume_border,
+                    int                gravity,
+                    MetaRectangle     *rect)
+{
+  int ref_x, ref_y;
+  int bw;
+  int child_x, child_y;
+  int frame_width, frame_height;
+  MetaFrameBorders borders;
+
+  if (coords_assume_border)
+    bw = window->border_width;
+  else
+    bw = 0;
+
+  meta_frame_calc_borders (window->frame, &borders);
+
+  child_x = borders.visible.left;
+  child_y = borders.visible.top;
+  frame_width = child_x + rect->width + borders.visible.right;
+  frame_height = child_y + rect->height + borders.visible.bottom;
+
+  /* We're computing position to pass to window_move, which is
+   * the position of the client window (StaticGravity basically)
+   *
+   * (see WM spec description of gravity computation, but note that
+   * their formulas assume we're honoring the border width, rather
+   * than compensating for having turned it off)
+   */
+
+  /* Calculate the the reference point, which is the corner of the
+   * outer window specified by the gravity. So, NorthEastGravity
+   * would have the reference point as the top-right corner of the
+   * outer window. */
+  ref_x = rect->x;
+  ref_y = rect->y;
+
+  switch (gravity)
+    {
+    case NorthGravity:
+    case CenterGravity:
+    case SouthGravity:
+      ref_x += rect->width / 2 + bw;
+      break;
+    case NorthEastGravity:
+    case EastGravity:
+    case SouthEastGravity:
+      ref_x += rect->width + bw * 2;
+      break;
+    default:
+      break;
+    }
+
+  switch (gravity)
+    {
+    case WestGravity:
+    case CenterGravity:
+    case EastGravity:
+      ref_y += rect->height / 2 + bw;
+      break;
+    case SouthWestGravity:
+    case SouthGravity:
+    case SouthEastGravity:
+      ref_y += rect->height + bw * 2;
+      break;
+    default:
+      break;
+    }
+
+  /* Find the top-left corner of the outer window from
+   * the reference point. */
+
+  rect->x = ref_x;
+  rect->y = ref_y;
+
+  switch (gravity)
+    {
+    case NorthGravity:
+    case CenterGravity:
+    case SouthGravity:
+      rect->x -= frame_width / 2;
+      break;
+    case NorthEastGravity:
+    case EastGravity:
+    case SouthEastGravity:
+      rect->x -= frame_width;
+      break;
+    }
+
+  switch (gravity)
+    {
+    case WestGravity:
+    case CenterGravity:
+    case EastGravity:
+      rect->y -= frame_height / 2;
+      break;
+    case SouthWestGravity:
+    case SouthGravity:
+    case SouthEastGravity:
+      rect->y -= frame_height;
+      break;
+    }
+
+  /* Adjust to get the top-left corner of the inner window. */
+  rect->x += child_x;
+  rect->y += child_y;
+}
+
+static void
 meta_window_apply_session_info (MetaWindow *window,
                                 const MetaWindowSessionInfo *info)
 {
@@ -359,31 +469,31 @@ meta_window_apply_session_info (MetaWindow *window,
 
   if (info->geometry_set)
     {
-      int x, y, w, h;
+      MetaRectangle rect;
       MetaMoveResizeFlags flags;
 
       window->placed = TRUE; /* don't do placement algorithms later */
 
-      x = info->rect.x;
-      y = info->rect.y;
+      rect.x = info->rect.x;
+      rect.y = info->rect.y;
 
-      w = window->size_hints.base_width +
-        info->rect.width * window->size_hints.width_inc;
-      h = window->size_hints.base_height +
-        info->rect.height * window->size_hints.height_inc;
+      rect.width = window->size_hints.base_width + info->rect.width * window->size_hints.width_inc;
+      rect.height = window->size_hints.base_height + info->rect.height * window->size_hints.height_inc;
 
       /* Force old gravity, ignoring anything now set */
       window->size_hints.win_gravity = info->gravity;
 
-      meta_topic (META_DEBUG_SM,
-                  "Restoring pos %d,%d size %d x %d for %s\n",
-                  x, y, w, h, window->desc);
+      flags = META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION;
+
+      adjust_for_gravity (window,
+                          FALSE,
+                          window->size_hints.win_gravity,
+                          &rect);
 
-      flags = META_DO_GRAVITY_ADJUST | META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION;
       meta_window_move_resize_internal (window,
                                         flags,
                                         window->size_hints.win_gravity,
-                                        x, y, w, h);
+                                        rect.x, rect.y, rect.width, rect.height);
     }
 }
 
@@ -428,13 +538,24 @@ meta_window_x11_manage (MetaWindow *window)
    */
   flags = META_IS_CONFIGURE_REQUEST | META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION;
   if (!window->override_redirect)
-    meta_window_move_resize_internal (window,
-                                      flags,
-                                      window->size_hints.win_gravity,
-                                      window->size_hints.x,
-                                      window->size_hints.y,
-                                      window->size_hints.width,
-                                      window->size_hints.height);
+    {
+      MetaRectangle rect;
+
+      rect.x = window->size_hints.x;
+      rect.y = window->size_hints.y;
+      rect.width = window->size_hints.width;
+      rect.height = window->size_hints.height;
+
+      adjust_for_gravity (window,
+                          TRUE,
+                          window->size_hints.win_gravity,
+                          &rect);
+
+      meta_window_move_resize_internal (window,
+                                        flags,
+                                        window->size_hints.win_gravity,
+                                        rect.x, rect.y, rect.width, rect.height);
+    }
 }
 
 static void
@@ -1958,13 +2079,24 @@ meta_window_move_resize_request (MetaWindow *window,
     flags |= META_IS_RESIZE_ACTION;
 
   if (flags & (META_IS_MOVE_ACTION | META_IS_RESIZE_ACTION))
-    meta_window_move_resize_internal (window,
-                                      flags,
-                                      gravity,
-                                      x,
-                                      y,
-                                      width,
-                                      height);
+    {
+      MetaRectangle rect;
+
+      rect.x = x;
+      rect.y = y;
+      rect.width = width;
+      rect.height = height;
+
+      adjust_for_gravity (window,
+                          TRUE,
+                          window->size_hints.win_gravity,
+                          &rect);
+
+      meta_window_move_resize_internal (window,
+                                        flags,
+                                        gravity,
+                                        rect.x, rect.y, rect.width, rect.height);
+    }
 
   /* window->user_rect exists to allow "snapping-back" the window if a
    * new strut is set (causing the window to move) and then the strut