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gtk2/gtk/gtkcssmatcher.c

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css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
2012-03-17 01:17:23 +00:00
/* 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"
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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/* GTK_CSS_MATCHER_WIDGET_PATH */
matcher: Use a vtable Now we can do lots of fancy matchers, yay!
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static gboolean
gtk_css_matcher_widget_path_get_parent (GtkCssMatcher *matcher,
const GtkCssMatcher *child)
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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{
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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if (child->path.index == 0)
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return FALSE;
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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matcher->path.klass = child->path.klass;
matcher->path.path = child->path.path;
matcher->path.state_flags = 0;
matcher->path.index = child->path.index - 1;
matcher->path.sibling_index = gtk_widget_path_iter_get_sibling_index (matcher->path.path, matcher->path.index);
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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return TRUE;
}
matcher: Use a vtable Now we can do lots of fancy matchers, yay!
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static gboolean
gtk_css_matcher_widget_path_get_previous (GtkCssMatcher *matcher,
const GtkCssMatcher *next)
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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{
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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if (next->path.sibling_index == 0)
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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return FALSE;
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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matcher->path.klass = next->path.klass;
matcher->path.path = next->path.path;
matcher->path.state_flags = 0;
matcher->path.index = next->path.index;
matcher->path.sibling_index = next->path.sibling_index - 1;
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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return TRUE;
}
matcher: Use a vtable Now we can do lots of fancy matchers, yay!
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static GtkStateFlags
gtk_css_matcher_widget_path_get_state (const GtkCssMatcher *matcher)
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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{
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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return matcher->path.state_flags;
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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}
matcher: Use a vtable Now we can do lots of fancy matchers, yay!
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static gboolean
gtk_css_matcher_widget_path_has_name (const GtkCssMatcher *matcher,
const char *name)
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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{
const GtkWidgetPath *siblings;
GType type;
type = g_type_from_name (name);
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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);
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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else
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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return g_type_is_a (gtk_widget_path_iter_get_object_type (matcher->path.path, matcher->path.index), type);
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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}
matcher: Use a vtable Now we can do lots of fancy matchers, yay!
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static gboolean
gtk_css_matcher_widget_path_has_class (const GtkCssMatcher *matcher,
cssmatcher: Use quarks for classes
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GQuark class_name)
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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{
const GtkWidgetPath *siblings;
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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))
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return gtk_widget_path_iter_has_qclass (siblings, matcher->path.sibling_index, class_name);
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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else
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return gtk_widget_path_iter_has_qclass (matcher->path.path, matcher->path.index, class_name);
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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}
matcher: Use a vtable Now we can do lots of fancy matchers, yay!
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static gboolean
gtk_css_matcher_widget_path_has_id (const GtkCssMatcher *matcher,
const char *id)
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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{
const GtkWidgetPath *siblings;
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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);
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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else
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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return gtk_widget_path_iter_has_name (matcher->path.path, matcher->path.index, id);
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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}
matcher: Use a vtable Now we can do lots of fancy matchers, yay!
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static gboolean
gtk_css_matcher_widget_path_has_regions (const GtkCssMatcher *matcher)
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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{
const GtkWidgetPath *siblings;
GSList *regions;
gboolean result;
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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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);
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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else
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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regions = gtk_widget_path_iter_list_regions (matcher->path.path, matcher->path.index);
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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result = regions != NULL;
g_slist_free (regions);
return result;
}
matcher: Use a vtable Now we can do lots of fancy matchers, yay!
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static gboolean
gtk_css_matcher_widget_path_has_region (const GtkCssMatcher *matcher,
const char *region,
GtkRegionFlags flags)
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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{
const GtkWidgetPath *siblings;
GtkRegionFlags region_flags;
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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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))
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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{
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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if (!gtk_widget_path_iter_has_region (siblings, matcher->path.sibling_index, region, &region_flags))
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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return FALSE;
}
else
{
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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if (!gtk_widget_path_iter_has_region (matcher->path.path, matcher->path.index, region, &region_flags))
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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return FALSE;
}
if ((flags & region_flags) != flags)
return FALSE;
return TRUE;
}
selector: Rewrite position tracking We now track the position as a (type,a,b) tuple where the numbers make up the an + b formula from CSS3 nth-child. Also, the get_sibling() and get_sibling_index() vfuncs were replaced by a has_position() vfunc. This is mostly so that the matcher can always return TRUE. And I need that for the everything matcher.
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static gboolean
gtk_css_matcher_widget_path_has_position (const GtkCssMatcher *matcher,
gboolean forward,
int a,
int b)
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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{
const GtkWidgetPath *siblings;
selector: Rewrite position tracking We now track the position as a (type,a,b) tuple where the numbers make up the an + b formula from CSS3 nth-child. Also, the get_sibling() and get_sibling_index() vfuncs were replaced by a has_position() vfunc. This is mostly so that the matcher can always return TRUE. And I need that for the everything matcher.
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int x;
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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siblings = gtk_widget_path_iter_get_siblings (matcher->path.path, matcher->path.index);
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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if (!siblings)
selector: Rewrite position tracking We now track the position as a (type,a,b) tuple where the numbers make up the an + b formula from CSS3 nth-child. Also, the get_sibling() and get_sibling_index() vfuncs were replaced by a has_position() vfunc. This is mostly so that the matcher can always return TRUE. And I need that for the everything matcher.
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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;
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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selector: Rewrite position tracking We now track the position as a (type,a,b) tuple where the numbers make up the an + b formula from CSS3 nth-child. Also, the get_sibling() and get_sibling_index() vfuncs were replaced by a has_position() vfunc. This is mostly so that the matcher can always return TRUE. And I need that for the everything matcher.
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return x / a > 0;
css: Add GtkCssMatcher This is so we can later do matching with other things than GtkWidgetPath. In particular, this is a requirement for getting rid of GtkWidgetPath.
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}
matcher: Use a vtable Now we can do lots of fancy matchers, yay!
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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_name,
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,
selector: Rewrite position tracking We now track the position as a (type,a,b) tuple where the numbers make up the an + b formula from CSS3 nth-child. Also, the get_sibling() and get_sibling_index() vfuncs were replaced by a has_position() vfunc. This is mostly so that the matcher can always return TRUE. And I need that for the everything matcher.
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gtk_css_matcher_widget_path_has_position,
matcher: Use a vtable Now we can do lots of fancy matchers, yay!
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};
void
_gtk_css_matcher_init (GtkCssMatcher *matcher,
const GtkWidgetPath *path,
GtkStateFlags state)
{
matcher: Turn GtkCssMatcher into a union That way, we can add more matchers as we need them.
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matcher->path.klass = &GTK_CSS_MATCHER_WIDGET_PATH;
matcher->path.path = path;
matcher->path.state_flags = state;
matcher->path.index = gtk_widget_path_length (path) - 1;
matcher->path.sibling_index = gtk_widget_path_iter_get_sibling_index (path, matcher->path.index);
matcher: Use a vtable Now we can do lots of fancy matchers, yay!
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}
matcher: Add a matcher that matches anything Lesson learned: Adwaita uses all possible selector types and all of those for parents, too. But so far no siblings.
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/* 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;
}
static gboolean
gtk_css_matcher_any_has_name (const GtkCssMatcher *matcher,
const char *name)
{
return TRUE;
}
static gboolean
gtk_css_matcher_any_has_class (const GtkCssMatcher *matcher,
cssmatcher: Use quarks for classes
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GQuark class_name)
matcher: Add a matcher that matches anything Lesson learned: Adwaita uses all possible selector types and all of those for parents, too. But so far no siblings.
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{
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_name,
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,
};
void
_gtk_css_matcher_any_init (GtkCssMatcher *matcher)
{
matcher->klass = &GTK_CSS_MATCHER_ANY;
}
matcher: Add a superset matcher This matcher always matches only on some relvant things and ignores the rest. This allows you to match only on name and class, but ignore state and parents/siblings for example.
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/* 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;
}
static gboolean
gtk_css_matcher_superset_has_name (const GtkCssMatcher *matcher,
const char *name)
{
if (matcher->superset.relevant & GTK_CSS_CHANGE_NAME)
return _gtk_css_matcher_has_name (matcher->superset.subset, name);
else
return TRUE;
}
static gboolean
gtk_css_matcher_superset_has_class (const GtkCssMatcher *matcher,
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GQuark class_name)
matcher: Add a superset matcher This matcher always matches only on some relvant things and ignores the rest. This allows you to match only on name and class, but ignore state and parents/siblings for example.
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{
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_name,
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,
};
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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