1 files changed, 56 insertions, 34 deletions

diff --git a/src/gtkutil.c b/src/gtkutil.c
index d7340ba797e..5d28b0221af 100644
--- a/src/gtkutil.c
+++ b/src/gtkutil.c
@@ -869,6 +869,21 @@ xg_clear_under_internal_border (struct frame *f)
     }
 }
 
+static int
+xg_get_gdk_scale (void)
+{
+  const char *sscale = getenv ("GDK_SCALE");
+
+  if (sscale)
+    {
+      long scale = atol (sscale);
+      if (0 < scale)
+        return min (scale, INT_MAX);
+    }
+
+  return 1;
+}
+
 /* Function to handle resize of our frame.  As we have a Gtk+ tool bar
    and a Gtk+ menu bar, we get resize events for the edit part of the
    frame only.  We let Gtk+ deal with the Gtk+ parts.
@@ -919,6 +934,9 @@ xg_frame_set_char_size (struct frame *f, int width, int height)
   int pixelheight = FRAME_TEXT_TO_PIXEL_HEIGHT (f, height);
   Lisp_Object fullscreen = get_frame_param (f, Qfullscreen);
   gint gwidth, gheight;
+  int totalheight
+    = pixelheight + FRAME_TOOLBAR_HEIGHT (f) + FRAME_MENUBAR_HEIGHT (f);
+  int totalwidth = pixelwidth + FRAME_TOOLBAR_WIDTH (f);
 
   if (FRAME_PIXEL_HEIGHT (f) == 0)
     return;
@@ -929,6 +947,13 @@ xg_frame_set_char_size (struct frame *f, int width, int height)
   /* Do this before resize, as we don't know yet if we will be resized.  */
   xg_clear_under_internal_border (f);
 
+  if (FRAME_VISIBLE_P (f))
+    {
+      int scale = xg_get_gdk_scale ();
+      totalheight /= scale;
+      totalwidth /= scale;
+    }
+
   /* Resize the top level widget so rows and columns remain constant.
 
      When the frame is fullheight and we only want to change the width
@@ -943,38 +968,33 @@ xg_frame_set_char_size (struct frame *f, int width, int height)
       frame_size_history_add
         (f, Qxg_frame_set_char_size_1, width, height,
          list2 (make_number (gheight),
-                make_number (pixelheight + FRAME_TOOLBAR_HEIGHT (f)
-                             + FRAME_MENUBAR_HEIGHT (f))));
+                make_number (totalheight)));
 
       gtk_window_resize (GTK_WINDOW (FRAME_GTK_OUTER_WIDGET (f)),
                          gwidth,
-                         pixelheight + FRAME_TOOLBAR_HEIGHT (f)
-                         + FRAME_MENUBAR_HEIGHT (f));
+                         totalheight);
     }
   else if (EQ (fullscreen, Qfullheight) && height == FRAME_TEXT_HEIGHT (f))
     {
       frame_size_history_add
         (f, Qxg_frame_set_char_size_2, width, height,
          list2 (make_number (gwidth),
-                make_number (pixelwidth + FRAME_TOOLBAR_WIDTH (f))));
+                make_number (totalwidth)));
 
       gtk_window_resize (GTK_WINDOW (FRAME_GTK_OUTER_WIDGET (f)),
-                         pixelwidth + FRAME_TOOLBAR_WIDTH (f),
+                         totalwidth,
                          gheight);
     }
-
   else
     {
       frame_size_history_add
         (f, Qxg_frame_set_char_size_3, width, height,
-         list2 (make_number (pixelwidth + FRAME_TOOLBAR_WIDTH (f)),
-                make_number (pixelheight + FRAME_TOOLBAR_HEIGHT (f)
-                             + FRAME_MENUBAR_HEIGHT (f))));
+         list2 (make_number (totalwidth),
+                make_number (totalheight)));
 
       gtk_window_resize (GTK_WINDOW (FRAME_GTK_OUTER_WIDGET (f)),
-                         pixelwidth + FRAME_TOOLBAR_WIDTH (f),
-                         pixelheight + FRAME_TOOLBAR_HEIGHT (f)
-                         + FRAME_MENUBAR_HEIGHT (f));
+                         totalwidth,
+                         totalheight);
       fullscreen = Qnil;
     }
 
@@ -1126,18 +1146,6 @@ delete_cb (GtkWidget *widget,
            GdkEvent  *event,
            gpointer user_data)
 {
-#ifdef HAVE_GTK3
-  /* The event doesn't arrive in the normal event loop.  Send event
-     here.  */
-  struct frame *f = user_data;
-  struct input_event ie;
-
-  EVENT_INIT (ie);
-  ie.kind = DELETE_WINDOW_EVENT;
-  XSETFRAME (ie.frame_or_window, f);
-  kbd_buffer_store_event (&ie);
-#endif
-
   return TRUE;
 }
 
@@ -1356,6 +1364,7 @@ x_wm_set_size_hint (struct frame *f, long int flags, bool user_position)
   int min_rows = 0, min_cols = 0;
   int win_gravity = f->win_gravity;
   Lisp_Object fs_state, frame;
+  int scale = xg_get_gdk_scale ();
 
   /* Don't set size hints during initialization; that apparently leads
      to a race condition.  See the thread at
@@ -1435,6 +1444,11 @@ x_wm_set_size_hint (struct frame *f, long int flags, bool user_position)
       hint_flags |= GDK_HINT_USER_POS;
     }
 
+  size_hints.base_width /= scale;
+  size_hints.base_height /= scale;
+  size_hints.width_inc /= scale;
+  size_hints.height_inc /= scale;
+
   if (hint_flags != f->output_data.x->hint_flags
       || memcmp (&size_hints,
                  &f->output_data.x->size_hints,
@@ -3556,14 +3570,14 @@ update_theme_scrollbar_height (void)
 int
 xg_get_default_scrollbar_width (void)
 {
-  return scroll_bar_width_for_theme;
+  return scroll_bar_width_for_theme * xg_get_gdk_scale ();
 }
 
 int
 xg_get_default_scrollbar_height (void)
 {
   /* Apparently there's no default height for themes.  */
-  return scroll_bar_width_for_theme;
+  return scroll_bar_width_for_theme * xg_get_gdk_scale ();
 }
 
 /* Return the scrollbar id for X Window WID on display DPY.
@@ -3762,14 +3776,18 @@ xg_update_scrollbar_pos (struct frame *f,
                          int width,
                          int height)
 {
-
   GtkWidget *wscroll = xg_get_widget_from_map (scrollbar_id);
-
   if (wscroll)
     {
       GtkWidget *wfixed = f->output_data.x->edit_widget;
       GtkWidget *wparent = gtk_widget_get_parent (wscroll);
       gint msl;
+      int scale = xg_get_gdk_scale ();
+
+      top /= scale;
+      left /= scale;
+      height /= scale;
+      left -= (scale - 1) * ((width / scale) >> 1);
 
       /* Clear out old position.  */
       int oldx = -1, oldy = -1, oldw, oldh;
@@ -3800,11 +3818,15 @@ xg_update_scrollbar_pos (struct frame *f,
       gdk_window_process_all_updates ();
 #endif
       if (oldx != -1 && oldw > 0 && oldh > 0)
-        /* Clear under old scroll bar position.  This must be done after
-           the gtk_widget_queue_draw and gdk_window_process_all_updates
-           above.  */
-        x_clear_area (f,
-                      oldx, oldy, oldw, oldh);
+        {
+          /* Clear under old scroll bar position.  This must be done after
+             the gtk_widget_queue_draw and gdk_window_process_all_updates
+             above.  */
+          oldw += (scale - 1) * oldw;
+          oldx -= (scale - 1) * oldw;
+          x_clear_area (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
+                        oldx, oldy, oldw, oldh);
+        }
 
       /* GTK does not redraw until the main loop is entered again, but
          if there are no X events pending we will not enter it.  So we sync