From fb55e68268d2254a536aa88c1c23ed3c43d7b2eb Mon Sep 17 00:00:00 2001
From: Victor Kareh <vkareh@redhat.com>
Date: Wed, 22 May 2019 12:04:04 -0400
Subject: MetaFrameBorders: add invisible borders

This just adds the invisible border field and populates it with
data but doesn't use it in any way.

Based on mutter commit:
https://git.gnome.org/browse/mutter/commit/?id=a1a2527c75ab0c135f89396ea036336fb67ac538

upstream commit:
https://gitlab.gnome.org/GNOME/metacity/commit/bf02c7c3
---
 src/core/frame.c     |  8 ++++----
 src/include/common.h |  5 +++++
 src/ui/frames.c      | 10 ++++++++++
 src/ui/theme.c       | 10 ++++++++++
 4 files changed, 29 insertions(+), 4 deletions(-)

diff --git a/src/core/frame.c b/src/core/frame.c
index a2da9cb9..d4e09fbf 100644
--- a/src/core/frame.c
+++ b/src/core/frame.c
@@ -306,10 +306,10 @@ meta_frame_get_flags (MetaFrame *frame)
 void
 meta_frame_borders_clear (MetaFrameBorders *self)
 {
-  self->visible.top = 0;
-  self->visible.bottom = 0;
-  self->visible.left = 0;
-  self->visible.right = 0;
+  self->visible.top = self->invisible.top = self->total.top = 0;
+  self->visible.bottom = self->invisible.bottom = self->total.bottom = 0;
+  self->visible.left = self->invisible.left = self->total.left = 0;
+  self->visible.right = self->invisible.right = self->total.right = 0;
 }
 
 void
diff --git a/src/include/common.h b/src/include/common.h
index 18a4e12b..85e4f630 100644
--- a/src/include/common.h
+++ b/src/include/common.h
@@ -308,6 +308,11 @@ struct _MetaFrameBorders
    * and an outer portion that is invisible but responds to events.
    */
   GtkBorder visible;
+  GtkBorder invisible;
+
+  /* For convenience, we have a "total" border which is equal to the sum
+   * of the two borders above. */
+  GtkBorder total;
 };
 
 /* sets all dimensions to zero */
diff --git a/src/ui/frames.c b/src/ui/frames.c
index fff3b684..5908d991 100644
--- a/src/ui/frames.c
+++ b/src/ui/frames.c
@@ -799,6 +799,16 @@ meta_ui_frame_get_borders (MetaFrames       *frames,
   borders->visible.bottom *= scale;
   borders->visible.left *= scale;
   borders->visible.right *= scale;
+
+  borders->invisible.top *= scale;
+  borders->invisible.bottom *= scale;
+  borders->invisible.left *= scale;
+  borders->invisible.right *= scale;
+
+  borders->total.top *= scale;
+  borders->total.bottom *= scale;
+  borders->total.left *= scale;
+  borders->total.right *= scale;
 }
 
 void
diff --git a/src/ui/theme.c b/src/ui/theme.c
index 66cd4be8..b08b3903 100644
--- a/src/ui/theme.c
+++ b/src/ui/theme.c
@@ -433,6 +433,16 @@ meta_frame_layout_get_borders (const MetaFrameLayout *layout,
       meta_frame_borders_clear (borders);
       return;
     }
+
+  borders->invisible.left = layout->invisible_border.left;
+  borders->invisible.right = layout->invisible_border.right;
+  borders->invisible.bottom = layout->invisible_border.bottom;
+  borders->invisible.top = layout->invisible_border.top;
+
+  borders->total.left = borders->invisible.left + borders->visible.left;
+  borders->total.right = borders->invisible.right + borders->visible.right;
+  borders->total.bottom = borders->invisible.bottom + borders->visible.bottom;
+  borders->total.top = borders->invisible.top + borders->visible.top;
 }
 
 static MetaButtonType
-- 
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