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cssselector: Introduce a foreach_matcher vfunc
This vfunc iterates over all matchers of a selector and allows to write functions like the match function in a generic way using foreach.
This commit is contained in:
Benjamin Otte
parent
8a8f34b2db
commit
ad74fd9d7f
@ -37,16 +37,27 @@
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#define GTK_CSS_CHANGE_GOT_MATCH GTK_CSS_CHANGE_RESERVED_BIT
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typedef struct _GtkCssSelectorClass GtkCssSelectorClass;
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typedef gboolean (* GtkCssSelectorForeachFunc) (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher,
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gpointer data);
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struct _GtkCssSelectorClass {
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const char *name;
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void (* print) (const GtkCssSelector *selector,
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GString *string);
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/* NULL or an iterator that calls func with each submatcher of @matcher.
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* Potentially no submatcher exissts.
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* If any @invocation of @func returns %TRUE, the function will immediately
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* return %TRUE itself. If @func never returns %TRUE (or isn't called at all),
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* %FALSE will be returned.
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*/
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gboolean (* foreach_matcher) (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher,
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GtkCssSelectorForeachFunc func,
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gpointer data);
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gboolean (* match_one) (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher);
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gboolean (* match) (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher);
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void (* tree_match) (const GtkCssSelectorTree *tree,
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const GtkCssMatcher *matcher,
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GHashTable *res);
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@ -185,10 +196,16 @@ static gboolean
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gtk_css_selector_match (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher)
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{
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if (selector == NULL)
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return TRUE;
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return selector->class->match_one (selector, matcher);
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}
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return selector->class->match (selector, matcher);
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static gboolean
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gtk_css_selector_foreach (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher,
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GtkCssSelectorForeachFunc func,
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gpointer data)
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{
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return selector->class->foreach_matcher (selector, matcher, func, data);
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}
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static int
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@ -275,6 +292,15 @@ gtk_css_selector_default_add_specificity (const GtkCssSelector *selector,
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/* no specificity changes */
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}
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static gboolean
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gtk_css_selector_default_foreach_matcher (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher,
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GtkCssSelectorForeachFunc func,
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gpointer data)
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{
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return func (selector, matcher, data);
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}
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static gboolean
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gtk_css_selector_default_match_one (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher)
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@ -282,16 +308,6 @@ gtk_css_selector_default_match_one (const GtkCssSelector *selector,
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return TRUE;
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}
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static gboolean
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gtk_css_selector_default_match (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher)
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{
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if (!selector->class->match_one (selector, matcher))
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return FALSE;
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return gtk_css_selector_match (gtk_css_selector_previous (selector), matcher);
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}
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static void
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gtk_css_selector_default_tree_match (const GtkCssSelectorTree *tree,
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const GtkCssMatcher *matcher,
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@ -328,8 +344,10 @@ gtk_css_selector_descendant_print (const GtkCssSelector *selector,
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}
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static gboolean
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gtk_css_selector_descendant_match (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher)
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gtk_css_selector_descendant_foreach_matcher (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher,
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GtkCssSelectorForeachFunc func,
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gpointer data)
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{
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GtkCssMatcher ancestor;
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@ -337,8 +355,13 @@ gtk_css_selector_descendant_match (const GtkCssSelector *selector,
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{
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matcher = &ancestor;
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if (gtk_css_selector_match (gtk_css_selector_previous (selector), matcher))
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if (func (selector, &ancestor, data))
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return TRUE;
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/* any matchers are dangerous here, as we may loop forever, but
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we can terminate now as all possible matches have already been added */
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if (_gtk_css_matcher_matches_any (matcher))
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break;
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}
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return FALSE;
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@ -400,8 +423,8 @@ gtk_css_selector_descendant_get_change (const GtkCssSelector *selector, GtkCssCh
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static const GtkCssSelectorClass GTK_CSS_SELECTOR_DESCENDANT = {
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"descendant",
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gtk_css_selector_descendant_print,
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gtk_css_selector_descendant_foreach_matcher,
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gtk_css_selector_default_match_one,
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gtk_css_selector_descendant_match,
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gtk_css_selector_descendant_tree_match,
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gtk_css_selector_descendant_get_change,
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gtk_css_selector_descendant_tree_get_change,
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@ -421,14 +444,16 @@ gtk_css_selector_descendant_for_region_print (const GtkCssSelector *selector,
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}
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static gboolean
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gtk_css_selector_descendant_for_region_match (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher)
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gtk_css_selector_descendant_for_region_foreach_matcher (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher,
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GtkCssSelectorForeachFunc func,
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gpointer data)
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{
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GtkCssMatcher ancestor;
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if (_gtk_css_matcher_has_regions (matcher))
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{
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if (gtk_css_selector_match (gtk_css_selector_previous (selector), matcher))
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if (func (selector, matcher, data))
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return TRUE;
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}
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@ -436,8 +461,13 @@ gtk_css_selector_descendant_for_region_match (const GtkCssSelector *selector,
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{
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matcher = &ancestor;
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if (gtk_css_selector_match (gtk_css_selector_previous (selector), matcher))
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if (func (selector, matcher, data))
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return TRUE;
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/* any matchers are dangerous here, as we may loop forever, but
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we can terminate now as all possible matches have already been added */
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if (_gtk_css_matcher_matches_any (matcher))
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break;
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}
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return FALSE;
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@ -504,8 +534,8 @@ gtk_css_selector_descendant_for_region_get_change (const GtkCssSelector *selecto
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static const GtkCssSelectorClass GTK_CSS_SELECTOR_DESCENDANT_FOR_REGION = {
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"descendant_for_region",
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gtk_css_selector_descendant_for_region_print,
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gtk_css_selector_descendant_for_region_foreach_matcher,
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gtk_css_selector_default_match_one,
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gtk_css_selector_descendant_for_region_match,
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gtk_css_selector_descendant_for_region_tree_match,
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gtk_css_selector_descendant_for_region_get_change,
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gtk_css_selector_descendant_for_region_tree_get_change,
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@ -525,15 +555,17 @@ gtk_css_selector_child_print (const GtkCssSelector *selector,
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}
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static gboolean
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gtk_css_selector_child_match (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher)
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gtk_css_selector_child_foreach_matcher (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher,
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GtkCssSelectorForeachFunc func,
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gpointer data)
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{
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GtkCssMatcher parent;
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if (!_gtk_css_matcher_get_parent (&parent, matcher))
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return FALSE;
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return gtk_css_selector_match (gtk_css_selector_previous (selector), &parent);
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return func (selector, &parent, data);
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}
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static void
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@ -579,8 +611,8 @@ gtk_css_selector_child_get_change (const GtkCssSelector *selector, GtkCssChange
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static const GtkCssSelectorClass GTK_CSS_SELECTOR_CHILD = {
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"child",
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gtk_css_selector_child_print,
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gtk_css_selector_child_foreach_matcher,
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gtk_css_selector_default_match_one,
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gtk_css_selector_child_match,
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gtk_css_selector_child_tree_match,
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gtk_css_selector_child_get_change,
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gtk_css_selector_child_tree_get_change,
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@ -600,8 +632,10 @@ gtk_css_selector_sibling_print (const GtkCssSelector *selector,
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}
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static gboolean
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gtk_css_selector_sibling_match (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher)
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gtk_css_selector_sibling_foreach_matcher (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher,
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GtkCssSelectorForeachFunc func,
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gpointer data)
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{
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GtkCssMatcher previous;
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@ -609,8 +643,13 @@ gtk_css_selector_sibling_match (const GtkCssSelector *selector,
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{
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matcher = &previous;
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if (gtk_css_selector_match (gtk_css_selector_previous (selector), matcher))
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if (func (selector, matcher, data))
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return TRUE;
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/* any matchers are dangerous here, as we may loop forever, but
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we can terminate now as all possible matches have already been added */
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if (_gtk_css_matcher_matches_any (matcher))
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break;
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}
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return FALSE;
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@ -673,8 +712,8 @@ gtk_css_selector_sibling_get_change (const GtkCssSelector *selector, GtkCssChang
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static const GtkCssSelectorClass GTK_CSS_SELECTOR_SIBLING = {
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"sibling",
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gtk_css_selector_sibling_print,
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gtk_css_selector_sibling_foreach_matcher,
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gtk_css_selector_default_match_one,
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gtk_css_selector_sibling_match,
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gtk_css_selector_sibling_tree_match,
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gtk_css_selector_sibling_get_change,
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gtk_css_selector_sibling_tree_get_change,
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@ -694,15 +733,17 @@ gtk_css_selector_adjacent_print (const GtkCssSelector *selector,
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}
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static gboolean
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gtk_css_selector_adjacent_match (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher)
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gtk_css_selector_adjacent_foreach_matcher (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher,
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GtkCssSelectorForeachFunc func,
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gpointer data)
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{
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GtkCssMatcher previous;
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if (!_gtk_css_matcher_get_previous (&previous, matcher))
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return FALSE;
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return gtk_css_selector_match (gtk_css_selector_previous (selector), &previous);
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return func (selector, &previous, data);
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}
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static void
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@ -749,8 +790,8 @@ gtk_css_selector_adjacent_get_change (const GtkCssSelector *selector, GtkCssChan
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static const GtkCssSelectorClass GTK_CSS_SELECTOR_ADJACENT = {
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"adjacent",
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gtk_css_selector_adjacent_print,
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gtk_css_selector_adjacent_foreach_matcher,
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gtk_css_selector_default_match_one,
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gtk_css_selector_adjacent_match,
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gtk_css_selector_adjacent_tree_match,
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gtk_css_selector_adjacent_get_change,
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gtk_css_selector_adjacent_tree_get_change,
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@ -839,8 +880,8 @@ gtk_css_selector_ ## n ## _add_specificity (const GtkCssSelector *selector, \
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static const GtkCssSelectorClass GTK_CSS_SELECTOR_ ## c = { \
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G_STRINGIFY(n), \
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gtk_css_selector_ ## n ## _print, \
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gtk_css_selector_default_foreach_matcher, \
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match_func, \
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gtk_css_selector_default_match, \
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gtk_css_selector_default_tree_match, \
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gtk_css_selector_ ## n ## _get_change, \
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gtk_css_selector_ ## n ## _tree_get_change, \
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@ -853,8 +894,8 @@ static const GtkCssSelectorClass GTK_CSS_SELECTOR_ ## c = { \
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static const GtkCssSelectorClass GTK_CSS_SELECTOR_NOT_ ## c = { \
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"not_" G_STRINGIFY(n), \
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gtk_css_selector_not_ ## n ## _print, \
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gtk_css_selector_default_foreach_matcher, \
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gtk_css_selector_not_ ## n ## _match_one, \
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gtk_css_selector_default_match, \
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gtk_css_selector_default_tree_match, \
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gtk_css_selector_ ## n ## _get_change, \
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gtk_css_selector_ ## n ## _tree_get_change, \
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@ -1080,8 +1121,8 @@ gtk_css_selector_region_compare_one (const GtkCssSelector *a,
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static const GtkCssSelectorClass GTK_CSS_SELECTOR_REGION = {
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"region",
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gtk_css_selector_region_print,
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gtk_css_selector_default_foreach_matcher,
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gtk_css_selector_region_match_one,
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gtk_css_selector_default_match,
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gtk_css_selector_default_tree_match,
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gtk_css_selector_region_get_change,
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gtk_css_selector_region_tree_get_change,
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@ -1860,6 +1901,22 @@ _gtk_css_selector_tree_match_get_change (const GtkCssSelectorTree *tree)
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return change;
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}
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static gboolean
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gtk_css_selector_foreach_match (const GtkCssSelector *selector,
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const GtkCssMatcher *matcher,
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gpointer unused)
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{
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selector = gtk_css_selector_previous (selector);
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if (selector == NULL)
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return TRUE;
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if (!gtk_css_selector_match (selector, matcher))
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return FALSE;
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return gtk_css_selector_foreach (selector, matcher, gtk_css_selector_foreach_match, NULL);
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}
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/**
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* _gtk_css_selector_matches:
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* @selector: the selector
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@ -1884,7 +1941,10 @@ _gtk_css_selector_matches (const GtkCssSelector *selector,
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update_type_references ();
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return gtk_css_selector_match (selector, matcher);
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if (!gtk_css_selector_match (selector, matcher))
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return FALSE;
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return gtk_css_selector_foreach (selector, matcher, gtk_css_selector_foreach_match, NULL);
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}
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/* Computes specificity according to CSS 2.1.
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