From ea901abd61263b7618cae18abf49b42df38df4f3 Mon Sep 17 00:00:00 2001
From: "Jasper St. Pierre" <jstpierre@mecheye.net>
Date: Tue, 30 Jun 2015 22:14:03 -0700
Subject: [PATCH] frame: Don't allow resizing of edges that are constrained

https://bugzilla.gnome.org/show_bug.cgi?id=751857
---
 src/core/frame.c  | 12 ++++++++++++
 src/meta/common.h |  6 +++++-
 src/ui/theme.c    | 19 +++++++++++--------
 3 files changed, 28 insertions(+), 9 deletions(-)

diff --git a/src/core/frame.c b/src/core/frame.c
index c4be91a89..81e0e68bc 100644
--- a/src/core/frame.c
+++ b/src/core/frame.c
@@ -283,6 +283,18 @@ meta_frame_get_flags (MetaFrame *frame)
   if (frame->window->wm_state_above)
     flags |= META_FRAME_ABOVE;
 
+  if (frame->window->constrained_edges & META_DIRECTION_LEFT)
+    flags |= META_FRAME_CONSTRAINED_LEFT_EDGE;
+
+  if (frame->window->constrained_edges & META_DIRECTION_RIGHT)
+    flags |= META_FRAME_CONSTRAINED_RIGHT_EDGE;
+
+  if (frame->window->constrained_edges & META_DIRECTION_TOP)
+    flags |= META_FRAME_CONSTRAINED_TOP_EDGE;
+
+  if (frame->window->constrained_edges & META_DIRECTION_BOTTOM)
+    flags |= META_FRAME_CONSTRAINED_BOTTOM_EDGE;
+
   return flags;
 }
 
diff --git a/src/meta/common.h b/src/meta/common.h
index 4bcc67b9a..77d906b2f 100644
--- a/src/meta/common.h
+++ b/src/meta/common.h
@@ -83,7 +83,11 @@ typedef enum
   META_FRAME_IS_FLASHING              = 1 << 14,
   META_FRAME_ABOVE                    = 1 << 15,
   META_FRAME_TILED_LEFT               = 1 << 16,
-  META_FRAME_TILED_RIGHT              = 1 << 17
+  META_FRAME_TILED_RIGHT              = 1 << 17,
+  META_FRAME_CONSTRAINED_LEFT_EDGE    = 1 << 18,
+  META_FRAME_CONSTRAINED_RIGHT_EDGE   = 1 << 19,
+  META_FRAME_CONSTRAINED_TOP_EDGE     = 1 << 20,
+  META_FRAME_CONSTRAINED_BOTTOM_EDGE  = 1 << 21,
 } MetaFrameFlags;
 
 /**
diff --git a/src/ui/theme.c b/src/ui/theme.c
index 0dbfdf6e0..c39035636 100644
--- a/src/ui/theme.c
+++ b/src/ui/theme.c
@@ -100,22 +100,25 @@ meta_frame_layout_get_borders (const MetaFrameLayout *layout,
 
   if (flags & META_FRAME_ALLOWS_HORIZONTAL_RESIZE)
     {
-      borders->invisible.left   = MAX (borders->invisible.left,
-                                       draggable_borders - borders->visible.left);
-      borders->invisible.right  = MAX (borders->invisible.right,
-                                       draggable_borders - borders->visible.right);
+      if (!(flags & META_FRAME_CONSTRAINED_LEFT_EDGE))
+        borders->invisible.left   = MAX (borders->invisible.left,
+                                         draggable_borders - borders->visible.left);
+      if (!(flags & META_FRAME_CONSTRAINED_RIGHT_EDGE))
+        borders->invisible.right  = MAX (borders->invisible.right,
+                                         draggable_borders - borders->visible.right);
     }
 
   if (flags & META_FRAME_ALLOWS_VERTICAL_RESIZE)
     {
-      borders->invisible.bottom = MAX (borders->invisible.bottom,
-                                       draggable_borders - borders->visible.bottom);
-
       /* borders.visible.top is the height of the *title bar*. We can't do the same
        * algorithm here, titlebars are expectedly much bigger. Just subtract a couple
        * pixels to get a proper feel. */
-      if (type != META_FRAME_TYPE_ATTACHED)
+      if (!(flags & META_FRAME_CONSTRAINED_TOP_EDGE) && type != META_FRAME_TYPE_ATTACHED)
         borders->invisible.top    = MAX (borders->invisible.top, draggable_borders - 2);
+
+      if (!(flags & META_FRAME_CONSTRAINED_BOTTOM_EDGE))
+        borders->invisible.bottom = MAX (borders->invisible.bottom,
+                                         draggable_borders - borders->visible.bottom);
     }
 
   borders->total.left   = borders->invisible.left   + borders->visible.left;