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gtk2/gtk/gtkcssmatcher.c
Benjamin Otte 19eb1614de cssmatcher: Use widget path's state 
Don't take a state when constructing the CSS matcher. Instead, rely on
the newly introduced state in the widget path.

This way, the state can be queried not only on the first element, but on
all elements of the widget path.
2014-07-19 23:42:39 +02:00

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/* GTK - The GIMP Toolkit
* Copyright (C) 2012 Benjamin Otte <otte@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, see <http://www.gnu.org/licenses/>.
*/
#include "config.h"
#include "gtkcssmatcherprivate.h"
#include "gtkwidgetpath.h"
/* GTK_CSS_MATCHER_WIDGET_PATH */
static gboolean
gtk_css_matcher_widget_path_get_parent (GtkCssMatcher *matcher,
const GtkCssMatcher *child)
{
if (child->path.index == 0)
return FALSE;
matcher->path.klass = child->path.klass;
matcher->path.path = child->path.path;
matcher->path.index = child->path.index - 1;
matcher->path.sibling_index = gtk_widget_path_iter_get_sibling_index (matcher->path.path, matcher->path.index);
return TRUE;
}
static gboolean
gtk_css_matcher_widget_path_get_previous (GtkCssMatcher *matcher,
const GtkCssMatcher *next)
{
if (next->path.sibling_index == 0)
return FALSE;
matcher->path.klass = next->path.klass;
matcher->path.path = next->path.path;
matcher->path.index = next->path.index;
matcher->path.sibling_index = next->path.sibling_index - 1;
return TRUE;
}
static GtkStateFlags
gtk_css_matcher_widget_path_get_state (const GtkCssMatcher *matcher)
{
return gtk_widget_path_iter_get_state (matcher->path.path, matcher->path.index);
}
static gboolean
gtk_css_matcher_widget_path_has_type (const GtkCssMatcher *matcher,
GType type)
{
const GtkWidgetPath *siblings;
siblings = gtk_widget_path_iter_get_siblings (matcher->path.path, matcher->path.index);
if (siblings && matcher->path.sibling_index != gtk_widget_path_iter_get_sibling_index (matcher->path.path, matcher->path.index))
return g_type_is_a (gtk_widget_path_iter_get_object_type (siblings, matcher->path.sibling_index), type);
else
return g_type_is_a (gtk_widget_path_iter_get_object_type (matcher->path.path, matcher->path.index), type);
}
static gboolean
gtk_css_matcher_widget_path_has_class (const GtkCssMatcher *matcher,
GQuark class_name)
{
const GtkWidgetPath *siblings;
siblings = gtk_widget_path_iter_get_siblings (matcher->path.path, matcher->path.index);
if (siblings && matcher->path.sibling_index != gtk_widget_path_iter_get_sibling_index (matcher->path.path, matcher->path.index))
return gtk_widget_path_iter_has_qclass (siblings, matcher->path.sibling_index, class_name);
else
return gtk_widget_path_iter_has_qclass (matcher->path.path, matcher->path.index, class_name);
}
static gboolean
gtk_css_matcher_widget_path_has_id (const GtkCssMatcher *matcher,
const char *id)
{
const GtkWidgetPath *siblings;
siblings = gtk_widget_path_iter_get_siblings (matcher->path.path, matcher->path.index);
if (siblings && matcher->path.sibling_index != gtk_widget_path_iter_get_sibling_index (matcher->path.path, matcher->path.index))
return gtk_widget_path_iter_has_name (siblings, matcher->path.sibling_index, id);
else
return gtk_widget_path_iter_has_name (matcher->path.path, matcher->path.index, id);
}
static gboolean
gtk_css_matcher_widget_path_has_regions (const GtkCssMatcher *matcher)
{
const GtkWidgetPath *siblings;
GSList *regions;
gboolean result;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
siblings = gtk_widget_path_iter_get_siblings (matcher->path.path, matcher->path.index);
if (siblings && matcher->path.sibling_index != gtk_widget_path_iter_get_sibling_index (matcher->path.path, matcher->path.index))
regions = gtk_widget_path_iter_list_regions (siblings, matcher->path.sibling_index);
else
regions = gtk_widget_path_iter_list_regions (matcher->path.path, matcher->path.index);
result = regions != NULL;
g_slist_free (regions);
return result;
G_GNUC_END_IGNORE_DEPRECATIONS
}
static gboolean
gtk_css_matcher_widget_path_has_region (const GtkCssMatcher *matcher,
const char *region,
GtkRegionFlags flags)
{
const GtkWidgetPath *siblings;
GtkRegionFlags region_flags;
G_GNUC_BEGIN_IGNORE_DEPRECATIONS
siblings = gtk_widget_path_iter_get_siblings (matcher->path.path, matcher->path.index);
if (siblings && matcher->path.sibling_index != gtk_widget_path_iter_get_sibling_index (matcher->path.path, matcher->path.index))
{
if (!gtk_widget_path_iter_has_region (siblings, matcher->path.sibling_index, region, &region_flags))
return FALSE;
}
else
{
if (!gtk_widget_path_iter_has_region (matcher->path.path, matcher->path.index, region, &region_flags))
return FALSE;
}
if ((flags & region_flags) != flags)
return FALSE;
return TRUE;
G_GNUC_END_IGNORE_DEPRECATIONS
}
static gboolean
gtk_css_matcher_widget_path_has_position (const GtkCssMatcher *matcher,
gboolean forward,
int a,
int b)
{
const GtkWidgetPath *siblings;
int x;
siblings = gtk_widget_path_iter_get_siblings (matcher->path.path, matcher->path.index);
if (!siblings)
return FALSE;
if (forward)
x = matcher->path.sibling_index + 1;
else
x = gtk_widget_path_length (siblings) - matcher->path.sibling_index;
x -= b;
if (a == 0)
return x == 0;
if (x % a)
return FALSE;
return x / a > 0;
}
static const GtkCssMatcherClass GTK_CSS_MATCHER_WIDGET_PATH = {
gtk_css_matcher_widget_path_get_parent,
gtk_css_matcher_widget_path_get_previous,
gtk_css_matcher_widget_path_get_state,
gtk_css_matcher_widget_path_has_type,
gtk_css_matcher_widget_path_has_class,
gtk_css_matcher_widget_path_has_id,
gtk_css_matcher_widget_path_has_regions,
gtk_css_matcher_widget_path_has_region,
gtk_css_matcher_widget_path_has_position,
FALSE
};
gboolean
_gtk_css_matcher_init (GtkCssMatcher *matcher,
const GtkWidgetPath *path)
{
if (gtk_widget_path_length (path) == 0)
return FALSE;
matcher->path.klass = &GTK_CSS_MATCHER_WIDGET_PATH;
matcher->path.path = path;
matcher->path.index = gtk_widget_path_length (path) - 1;
matcher->path.sibling_index = gtk_widget_path_iter_get_sibling_index (path, matcher->path.index);
return TRUE;
}
/* GTK_CSS_MATCHER_WIDGET_ANY */
static gboolean
gtk_css_matcher_any_get_parent (GtkCssMatcher *matcher,
const GtkCssMatcher *child)
{
_gtk_css_matcher_any_init (matcher);
return TRUE;
}
static gboolean
gtk_css_matcher_any_get_previous (GtkCssMatcher *matcher,
const GtkCssMatcher *next)
{
_gtk_css_matcher_any_init (matcher);
return TRUE;
}
static GtkStateFlags
gtk_css_matcher_any_get_state (const GtkCssMatcher *matcher)
{
/* XXX: This gets tricky when we implement :not() */
return GTK_STATE_FLAG_ACTIVE | GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_SELECTED
| GTK_STATE_FLAG_INSENSITIVE | GTK_STATE_FLAG_INCONSISTENT
| GTK_STATE_FLAG_FOCUSED | GTK_STATE_FLAG_BACKDROP | GTK_STATE_FLAG_LINK
| GTK_STATE_FLAG_VISITED;
}
static gboolean
gtk_css_matcher_any_has_type (const GtkCssMatcher *matcher,
GType type)
{
return TRUE;
}
static gboolean
gtk_css_matcher_any_has_class (const GtkCssMatcher *matcher,
GQuark class_name)
{
return TRUE;
}
static gboolean
gtk_css_matcher_any_has_id (const GtkCssMatcher *matcher,
const char *id)
{
return TRUE;
}
static gboolean
gtk_css_matcher_any_has_regions (const GtkCssMatcher *matcher)
{
return TRUE;
}
static gboolean
gtk_css_matcher_any_has_region (const GtkCssMatcher *matcher,
const char *region,
GtkRegionFlags flags)
{
return TRUE;
}
static gboolean
gtk_css_matcher_any_has_position (const GtkCssMatcher *matcher,
gboolean forward,
int a,
int b)
{
return TRUE;
}
static const GtkCssMatcherClass GTK_CSS_MATCHER_ANY = {
gtk_css_matcher_any_get_parent,
gtk_css_matcher_any_get_previous,
gtk_css_matcher_any_get_state,
gtk_css_matcher_any_has_type,
gtk_css_matcher_any_has_class,
gtk_css_matcher_any_has_id,
gtk_css_matcher_any_has_regions,
gtk_css_matcher_any_has_region,
gtk_css_matcher_any_has_position,
TRUE
};
void
_gtk_css_matcher_any_init (GtkCssMatcher *matcher)
{
matcher->klass = &GTK_CSS_MATCHER_ANY;
}
/* GTK_CSS_MATCHER_WIDGET_SUPERSET */
static gboolean
gtk_css_matcher_superset_get_parent (GtkCssMatcher *matcher,
const GtkCssMatcher *child)
{
_gtk_css_matcher_any_init (matcher);
return TRUE;
}
static gboolean
gtk_css_matcher_superset_get_previous (GtkCssMatcher *matcher,
const GtkCssMatcher *next)
{
_gtk_css_matcher_any_init (matcher);
return TRUE;
}
static GtkStateFlags
gtk_css_matcher_superset_get_state (const GtkCssMatcher *matcher)
{
/* XXX: This gets tricky when we implement :not() */
if (matcher->superset.relevant & GTK_CSS_CHANGE_STATE)
return _gtk_css_matcher_get_state (matcher->superset.subset);
else
return GTK_STATE_FLAG_ACTIVE | GTK_STATE_FLAG_PRELIGHT | GTK_STATE_FLAG_SELECTED
| GTK_STATE_FLAG_INSENSITIVE | GTK_STATE_FLAG_INCONSISTENT
| GTK_STATE_FLAG_FOCUSED | GTK_STATE_FLAG_BACKDROP | GTK_STATE_FLAG_LINK
| GTK_STATE_FLAG_VISITED;
}
static gboolean
gtk_css_matcher_superset_has_type (const GtkCssMatcher *matcher,
GType type)
{
if (matcher->superset.relevant & GTK_CSS_CHANGE_NAME)
return _gtk_css_matcher_has_type (matcher->superset.subset, type);
else
return TRUE;
}
static gboolean
gtk_css_matcher_superset_has_class (const GtkCssMatcher *matcher,
GQuark class_name)
{
if (matcher->superset.relevant & GTK_CSS_CHANGE_CLASS)
return _gtk_css_matcher_has_class (matcher->superset.subset, class_name);
else
return TRUE;
}
static gboolean
gtk_css_matcher_superset_has_id (const GtkCssMatcher *matcher,
const char *id)
{
if (matcher->superset.relevant & GTK_CSS_CHANGE_NAME)
return _gtk_css_matcher_has_id (matcher->superset.subset, id);
else
return TRUE;
}
static gboolean
gtk_css_matcher_superset_has_regions (const GtkCssMatcher *matcher)
{
if (matcher->superset.relevant & GTK_CSS_CHANGE_NAME)
return _gtk_css_matcher_has_regions (matcher->superset.subset);
else
return TRUE;
}
static gboolean
gtk_css_matcher_superset_has_region (const GtkCssMatcher *matcher,
const char *region,
GtkRegionFlags flags)
{
if (matcher->superset.relevant & GTK_CSS_CHANGE_NAME)
{
if (matcher->superset.relevant & GTK_CSS_CHANGE_POSITION)
return _gtk_css_matcher_has_region (matcher->superset.subset, region, flags);
else
return _gtk_css_matcher_has_region (matcher->superset.subset, region, 0);
}
else
return TRUE;
}
static gboolean
gtk_css_matcher_superset_has_position (const GtkCssMatcher *matcher,
gboolean forward,
int a,
int b)
{
if (matcher->superset.relevant & GTK_CSS_CHANGE_POSITION)
return _gtk_css_matcher_has_position (matcher->superset.subset, forward, a, b);
else
return TRUE;
}
static const GtkCssMatcherClass GTK_CSS_MATCHER_SUPERSET = {
gtk_css_matcher_superset_get_parent,
gtk_css_matcher_superset_get_previous,
gtk_css_matcher_superset_get_state,
gtk_css_matcher_superset_has_type,
gtk_css_matcher_superset_has_class,
gtk_css_matcher_superset_has_id,
gtk_css_matcher_superset_has_regions,
gtk_css_matcher_superset_has_region,
gtk_css_matcher_superset_has_position,
FALSE
};
void
_gtk_css_matcher_superset_init (GtkCssMatcher *matcher,
const GtkCssMatcher *subset,
GtkCssChange relevant)
{
g_return_if_fail (subset != NULL);
g_return_if_fail ((relevant & ~(GTK_CSS_CHANGE_CLASS | GTK_CSS_CHANGE_NAME | GTK_CSS_CHANGE_POSITION | GTK_CSS_CHANGE_STATE)) == 0);
matcher->superset.klass = &GTK_CSS_MATCHER_SUPERSET;
matcher->superset.subset = subset;
matcher->superset.relevant = relevant;
}
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