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themingengine: shrink the background size to the padding-box

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This fixes a regression introduced by this commit [1] that causes
background to draw beyond the padding-box, which breaks rounded corners,
(in addition to not being compliant with what CSS does by default).

[1] http://git.gnome.org/browse/gtk+/commit/?id=c56700ca3029a9ab1362009bff35f2a70e432c02

https://bugzilla.gnome.org/show_bug.cgi?id=652618
This commit is contained in:
Cosimo Cecchi 2011-06-15 01:07:11 -04:00
parent b47c7405f2
commit af77ba78bb
1 changed files with 14 additions and 5 deletions
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19
gtk/gtkthemingengine.c
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@ -1388,6 +1388,7 @@ render_background_internal (GtkThemingEngine *engine,
gdouble progress;
GtkRoundedBox border_box;
GtkShadow *box_shadow;
GtkBorder border;
flags = gtk_theming_engine_get_state (engine);
@ -1584,8 +1585,21 @@ render_background_internal (GtkThemingEngine *engine,
cairo_pattern_destroy (other_pattern);
}
gtk_theming_engine_get_border (engine, flags, &border);
/* In the CSS box model, by default the background positioning area is
* the padding-box, i.e. all the border-box minus the borders themselves,
* which determines also its default size, see
* http://dev.w3.org/csswg/css3-background/#background-origin
*
* In the future we might want to support different origins or clips, but
* right now we just shrink to the default.
*/
_gtk_rounded_box_init_rect (&border_box, 0, 0, width, height);
_gtk_rounded_box_apply_border_radius (&border_box, engine, flags, junction);
_gtk_rounded_box_shrink (&border_box,
border.top, border.right,
border.bottom, border.left);
_gtk_rounded_box_path (&border_box, cr);
if (pattern)
@ -1604,11 +1618,6 @@ render_background_internal (GtkThemingEngine *engine,
if (box_shadow != NULL)
{
GtkBorder border;
gtk_theming_engine_get_border (engine, flags, &border);
_gtk_rounded_box_shrink (&border_box,
border.top, border.right,
border.bottom, border.left);
_gtk_box_shadow_render (box_shadow, cr, &border_box);
_gtk_shadow_unref (box_shadow);
}