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/* GTK - The GIMP Toolkit
* Copyright (C) 2011 Red Hat, Inc.
*
* Author: Cosimo Cecchi <cosimoc@gnome.org>
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the
* Free Software Foundation, Inc., 59 Temple Place - Suite 330,
* Boston, MA 02111-1307, USA.
*/
#include "config.h"
#include "gtkshadowprivate.h"
#include "gtkstylecontext.h"
#include "gtkthemingengineprivate.h"
#include "gtkthemingengine.h"
#include "gtkpango.h"
#include "gtkthemingengineprivate.h"
typedef struct _GtkShadowElement GtkShadowElement;
struct _GtkShadowElement {
gint16 hoffset;
gint16 voffset;
gint16 radius;
gint16 spread;
gboolean inset;
GdkRGBA color;
GtkSymbolicColor *symbolic_color;
};
static void
shadow_element_print (GtkShadowElement *element,
GString *str)
{
gchar *color_str;
if (element->inset)
g_string_append (str, "inset ");
g_string_append_printf (str, "%d %d ",
(gint) element->hoffset,
(gint) element->voffset);
if (element->radius != 0)
g_string_append_printf (str, "%d ", (gint) element->radius);
if (element->spread != 0)
g_string_append_printf (str, "%d ", (gint) element->spread);
if (element->symbolic_color != NULL)
color_str = gtk_symbolic_color_to_string (element->symbolic_color);
else
color_str = gdk_rgba_to_string (&element->color);
g_string_append (str, color_str);
g_free (color_str);
}
static void
shadow_element_free (GtkShadowElement *element)
{
if (element->symbolic_color != NULL)
gtk_symbolic_color_unref (element->symbolic_color);
g_slice_free (GtkShadowElement, element);
}
static GtkShadowElement *
shadow_element_new (gdouble hoffset,
gdouble voffset,
gdouble radius,
gdouble spread,
gboolean inset,
GdkRGBA *color,
GtkSymbolicColor *symbolic_color)
{
GtkShadowElement *retval;
retval = g_slice_new0 (GtkShadowElement);
retval->hoffset = hoffset;
retval->voffset = voffset;
retval->radius = radius;
retval->spread = spread;
retval->inset = inset;
if (symbolic_color != NULL)
retval->symbolic_color = gtk_symbolic_color_ref (symbolic_color);
if (color != NULL)
retval->color = *color;
return retval;
}
/****************
* GtkShadow *
****************/
G_DEFINE_BOXED_TYPE (GtkShadow, _gtk_shadow,
_gtk_shadow_ref, _gtk_shadow_unref)
struct _GtkShadow {
GList *elements;
guint ref_count;
gboolean resolved;
};
GtkShadow *
_gtk_shadow_new (void)
{
GtkShadow *retval;
retval = g_slice_new0 (GtkShadow);
retval->ref_count = 1;
retval->resolved = FALSE;
return retval;
}
GtkShadow *
_gtk_shadow_ref (GtkShadow *shadow)
{
g_return_val_if_fail (shadow != NULL, NULL);
shadow->ref_count++;
return shadow;
}
gboolean
_gtk_shadow_get_resolved (GtkShadow *shadow)
{
return shadow->resolved;
}
void
_gtk_shadow_unref (GtkShadow *shadow)
{
g_return_if_fail (shadow != NULL);
shadow->ref_count--;
if (shadow->ref_count == 0)
{
g_list_free_full (shadow->elements,
(GDestroyNotify) shadow_element_free);
g_slice_free (GtkShadow, shadow);
}
}
void
_gtk_shadow_append (GtkShadow *shadow,
gdouble hoffset,
gdouble voffset,
gdouble radius,
gdouble spread,
gboolean inset,
GtkSymbolicColor *color)
{
GtkShadowElement *element;
g_return_if_fail (shadow != NULL);
g_return_if_fail (color != NULL);
element = shadow_element_new (hoffset, voffset,
radius, spread, inset,
NULL, color);
shadow->elements = g_list_append (shadow->elements, element);
}
GtkShadow *
_gtk_shadow_resolve (GtkShadow *shadow,
GtkStyleProperties *props)
{
GtkShadow *resolved_shadow;
GtkShadowElement *element, *resolved_element;
GdkRGBA color;
GList *l;
if (shadow->resolved)
return _gtk_shadow_ref (shadow);
resolved_shadow = _gtk_shadow_new ();
for (l = shadow->elements; l != NULL; l = l->next)
{
element = l->data;
if (!gtk_symbolic_color_resolve (element->symbolic_color,
props,
&color))
{
_gtk_shadow_unref (resolved_shadow);
return NULL;
}
resolved_element =
shadow_element_new (element->hoffset, element->voffset,
element->radius, element->spread, element->inset,
&color, NULL);
resolved_shadow->elements =
g_list_append (resolved_shadow->elements, resolved_element);
}
resolved_shadow->resolved = TRUE;
return resolved_shadow;
}
void
_gtk_shadow_print (GtkShadow *shadow,
GString *str)
{
gint length;
GList *l;
length = g_list_length (shadow->elements);
if (length == 0)
return;
shadow_element_print (shadow->elements->data, str);
if (length == 1)
return;
for (l = g_list_next (shadow->elements); l != NULL; l = l->next)
{
g_string_append (str, ", ");
shadow_element_print (l->data, str);
}
}
void
_gtk_text_shadow_paint_layout (GtkShadow *shadow,
cairo_t *cr,
PangoLayout *layout)
{
GList *l;
GtkShadowElement *element;
if (!cairo_has_current_point (cr))
cairo_move_to (cr, 0, 0);
/* render shadows starting from the last one,
* and the others on top.
*/
for (l = g_list_last (shadow->elements); l != NULL; l = l->prev)
{
element = l->data;
cairo_save (cr);
cairo_rel_move_to (cr, element->hoffset, element->voffset);
gdk_cairo_set_source_rgba (cr, &element->color);
_gtk_pango_fill_layout (cr, layout);
cairo_rel_move_to (cr, -element->hoffset, -element->voffset);
cairo_restore (cr);
}
}
void
_gtk_icon_shadow_paint (GtkShadow *shadow,
cairo_t *cr)
{
GList *l;
GtkShadowElement *element;
cairo_pattern_t *pattern;
for (l = g_list_last (shadow->elements); l != NULL; l = l->prev)
{
element = l->data;
cairo_save (cr);
pattern = cairo_pattern_reference (cairo_get_source (cr));
gdk_cairo_set_source_rgba (cr, &element->color);
cairo_translate (cr, element->hoffset, element->voffset);
cairo_mask (cr, pattern);
cairo_restore (cr);
cairo_pattern_destroy (pattern);
}
}
void
_gtk_icon_shadow_paint_spinner (GtkShadow *shadow,
cairo_t *cr,
gdouble radius,
gdouble progress)
{
GtkShadowElement *element;
GList *l;
for (l = g_list_last (shadow->elements); l != NULL; l = l->prev)
{
element = l->data;
cairo_save (cr);
cairo_translate (cr, element->hoffset, element->voffset);
_gtk_theming_engine_paint_spinner (cr,
radius, progress,
&element->color);
cairo_restore (cr);
}
}
void
_gtk_box_shadow_render (GtkShadow *shadow,
cairo_t *cr,
const GtkRoundedBox *padding_box)
{
GtkShadowElement *element;
GtkRoundedBox box;
GList *l;
cairo_save (cr);
cairo_set_fill_rule (cr, CAIRO_FILL_RULE_EVEN_ODD);
_gtk_rounded_box_path (padding_box, cr);
cairo_clip (cr);
/* render shadows starting from the last one,
* and the others on top.
*/
for (l = g_list_last (shadow->elements); l != NULL; l = l->prev)
{
element = l->data;
if (!element->inset)
continue;
box = *padding_box;
_gtk_rounded_box_move (&box, element->hoffset, element->voffset);
_gtk_rounded_box_shrink (&box,
element->spread, element->spread,
element->spread, element->spread);
_gtk_rounded_box_path (&box, cr);
_gtk_rounded_box_clip_path (padding_box, cr);
gdk_cairo_set_source_rgba (cr, &element->color);
cairo_fill (cr);
}
cairo_restore (cr);
}
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