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Check for invalid GTK+ monitor scales

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* src/gtkutil.c (xg_get_gdk_scale): Return 1 for invalid scales,
INT_MAX for too-large scales.  All callers changed to assume the
result is valid (Bug#20432).
(xg_frame_set_char_size, xg_update_scrollbar_pos):
Calculate scale only if needed.

show ASCII approximations instead.
This commit is contained in:
Paul Eggert 2015-05-14 09:21:56 -07:00
parent f85318cdcd
commit 1d1581a2de
1 changed files with 26 additions and 37 deletions
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63
src/gtkutil.c
View file

@ -869,13 +869,18 @@ xg_clear_under_internal_border (struct frame *f)
}
static int
xg_get_gdk_scale()
xg_get_gdk_scale (void)
{
const char *sscale = getenv("GDK_SCALE");
int scale = 1;
const char *sscale = getenv ("GDK_SCALE");
if (sscale) sscanf(sscale, "%d", &scale);
return 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
@ -928,10 +933,9 @@ 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 totalheight
= pixelheight + FRAME_TOOLBAR_HEIGHT (f) + FRAME_MENUBAR_HEIGHT (f);
int totalwidth = pixelwidth + FRAME_TOOLBAR_WIDTH (f);
int scale = xg_get_gdk_scale ();
if (FRAME_PIXEL_HEIGHT (f) == 0)
return;
@ -942,8 +946,9 @@ 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) && scale > 1)
if (FRAME_VISIBLE_P (f))
{
int scale = xg_get_gdk_scale ();
totalheight /= scale;
totalwidth /= scale;
}
@ -1438,13 +1443,10 @@ x_wm_set_size_hint (struct frame *f, long int flags, bool user_position)
hint_flags |= GDK_HINT_USER_POS;
}
if (scale > 1)
{
size_hints.base_width /= scale;
size_hints.base_height /= scale;
size_hints.width_inc /= scale;
size_hints.height_inc /= scale;
}
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,
@ -3767,22 +3769,18 @@ xg_update_scrollbar_pos (struct frame *f,
int width,
int height)
{
GtkWidget *wscroll = xg_get_widget_from_map (scrollbar_id);
int scale = xg_get_gdk_scale ();
if (scale > 1)
{
top /= scale;
left /= scale;
height /= scale;
}
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;
@ -3794,12 +3792,6 @@ xg_update_scrollbar_pos (struct frame *f,
}
/* Move and resize to new values. */
if (scale > 1)
{
int adj = (scale-1)*(width/scale/2);
left -= adj;
}
gtk_fixed_move (GTK_FIXED (wfixed), wparent, left, top);
gtk_widget_style_get (wscroll, "min-slider-length", &msl, NULL);
if (msl > height)
@ -3821,11 +3813,8 @@ xg_update_scrollbar_pos (struct frame *f,
/* Clear under old scroll bar position. This must be done after
the gtk_widget_queue_draw and gdk_window_process_all_updates
above. */
if (scale > 1)
{
oldw += (scale-1)*oldw;
oldx -= (scale-1)*oldw;
}
oldw += (scale - 1) * oldw;
oldx -= (scale - 1) * oldw;
x_clear_area (FRAME_X_DISPLAY (f), FRAME_X_WINDOW (f),
oldx, oldy, oldw, oldh);
}