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selector: Add GtkSelectorCategory

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This will make it easier to write more complex matching algorithms.
This commit is contained in:
Benjamin Otte 2020-01-21 16:51:55 +01:00
parent f42e18507f
commit 2a5a52dd4b
1 changed files with 51 additions and 25 deletions
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76
gtk/gtkcssselector.c
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@ -30,6 +30,23 @@
# include <intrin.h>
#endif
/*
* @GTK_CSS_SELECTOR_CATEGORY_SIMPLE: A simple selector
* @GTK_CSS_SELECTOR_CATEGORY_SIMPLE_RADICAL: A simple selector that matches
* what change tracking considers a "radical change"
* @GTK_CSS_SELECTOR_SIBLING: A selector matching siblings
* @GTK_CSS_SELECTOR_CATEGORY_PARENT: A selector matching a parent or other
* ancestor
*
* Categorize the selectors. This helps in various loops when matching.
*/
typedef enum {
GTK_CSS_SELECTOR_CATEGORY_SIMPLE,
GTK_CSS_SELECTOR_CATEGORY_SIMPLE_RADICAL,
GTK_CSS_SELECTOR_CATEGORY_PARENT,
GTK_CSS_SELECTOR_CATEGORY_SIBLING,
} GtkCssSelectorCategory;
typedef struct _GtkCssSelectorClass GtkCssSelectorClass;
typedef gboolean (* GtkCssSelectorForeachFunc) (const GtkCssSelector *selector,
const GtkCssMatcher *matcher,
@ -37,6 +54,7 @@ typedef gboolean (* GtkCssSelectorForeachFunc) (const GtkCssSelector *selector,
struct _GtkCssSelectorClass {
const char *name;
GtkCssSelectorCategory category;
void (* print) (const GtkCssSelector *selector,
GString *string);
@ -61,9 +79,6 @@ struct _GtkCssSelectorClass {
guint (* hash_one) (const GtkCssSelector *selector);
int (* compare_one) (const GtkCssSelector *a,
const GtkCssSelector *b);
guint is_simple : 1;
guint ignore_for_change : 1;
};
typedef enum {
@ -308,6 +323,7 @@ gtk_css_selector_descendant_get_change (const GtkCssSelector *selector, GtkCssCh
static const GtkCssSelectorClass GTK_CSS_SELECTOR_DESCENDANT = {
"descendant",
GTK_CSS_SELECTOR_CATEGORY_PARENT,
gtk_css_selector_descendant_print,
gtk_css_selector_descendant_foreach_matcher,
gtk_css_selector_default_match_one,
@ -315,8 +331,6 @@ static const GtkCssSelectorClass GTK_CSS_SELECTOR_DESCENDANT = {
gtk_css_selector_default_add_specificity,
gtk_css_selector_default_hash_one,
gtk_css_selector_default_compare_one,
FALSE,
TRUE
};
/* CHILD */
@ -350,6 +364,7 @@ gtk_css_selector_child_get_change (const GtkCssSelector *selector, GtkCssChange
static const GtkCssSelectorClass GTK_CSS_SELECTOR_CHILD = {
"child",
GTK_CSS_SELECTOR_CATEGORY_PARENT,
gtk_css_selector_child_print,
gtk_css_selector_child_foreach_matcher,
gtk_css_selector_default_match_one,
@ -357,8 +372,6 @@ static const GtkCssSelectorClass GTK_CSS_SELECTOR_CHILD = {
gtk_css_selector_default_add_specificity,
gtk_css_selector_default_hash_one,
gtk_css_selector_default_compare_one,
FALSE,
TRUE
};
/* SIBLING */
@ -397,6 +410,7 @@ gtk_css_selector_sibling_get_change (const GtkCssSelector *selector, GtkCssChang
static const GtkCssSelectorClass GTK_CSS_SELECTOR_SIBLING = {
"sibling",
GTK_CSS_SELECTOR_CATEGORY_SIBLING,
gtk_css_selector_sibling_print,
gtk_css_selector_sibling_foreach_matcher,
gtk_css_selector_default_match_one,
@ -404,8 +418,6 @@ static const GtkCssSelectorClass GTK_CSS_SELECTOR_SIBLING = {
gtk_css_selector_default_add_specificity,
gtk_css_selector_default_hash_one,
gtk_css_selector_default_compare_one,
FALSE,
TRUE
};
/* ADJACENT */
@ -439,6 +451,7 @@ gtk_css_selector_adjacent_get_change (const GtkCssSelector *selector, GtkCssChan
static const GtkCssSelectorClass GTK_CSS_SELECTOR_ADJACENT = {
"adjacent",
GTK_CSS_SELECTOR_CATEGORY_SIBLING,
gtk_css_selector_adjacent_print,
gtk_css_selector_adjacent_foreach_matcher,
gtk_css_selector_default_match_one,
@ -446,8 +459,6 @@ static const GtkCssSelectorClass GTK_CSS_SELECTOR_ADJACENT = {
gtk_css_selector_default_add_specificity,
gtk_css_selector_default_hash_one,
gtk_css_selector_default_compare_one,
FALSE,
TRUE
};
/* SIMPLE SELECTOR DEFINE */
@ -513,6 +524,7 @@ gtk_css_selector_ ## n ## _add_specificity (const GtkCssSelector *selector, \
\
static const GtkCssSelectorClass GTK_CSS_SELECTOR_ ## c = { \
G_STRINGIFY(n), \
ignore_for_change ? GTK_CSS_SELECTOR_CATEGORY_SIMPLE : GTK_CSS_SELECTOR_CATEGORY_SIMPLE_RADICAL, \
gtk_css_selector_ ## n ## _print, \
gtk_css_selector_default_foreach_matcher, \
match_func, \
@ -520,12 +532,11 @@ static const GtkCssSelectorClass GTK_CSS_SELECTOR_ ## c = { \
gtk_css_selector_ ## n ## _add_specificity, \
hash_func, \
comp_func, \
TRUE, \
ignore_for_change \
};\
\
static const GtkCssSelectorClass GTK_CSS_SELECTOR_NOT_ ## c = { \
"not_" G_STRINGIFY(n), \
ignore_for_change ? GTK_CSS_SELECTOR_CATEGORY_SIMPLE : GTK_CSS_SELECTOR_CATEGORY_SIMPLE_RADICAL, \
gtk_css_selector_not_ ## n ## _print, \
gtk_css_selector_default_foreach_matcher, \
gtk_css_selector_not_ ## n ## _match_one, \
@ -533,8 +544,6 @@ static const GtkCssSelectorClass GTK_CSS_SELECTOR_NOT_ ## c = { \
gtk_css_selector_ ## n ## _add_specificity, \
hash_func, \
comp_func, \
TRUE, \
ignore_for_change \
};
/* ANY */
@ -1755,6 +1764,23 @@ _gtk_css_selector_get_change (const GtkCssSelector *selector)
/******************** SelectorTree handling *****************/
static gboolean
gtk_css_selector_is_simple (const GtkCssSelector *selector)
{
switch (selector->class->category)
{
case GTK_CSS_SELECTOR_CATEGORY_SIMPLE:
case GTK_CSS_SELECTOR_CATEGORY_SIMPLE_RADICAL:
return TRUE;
case GTK_CSS_SELECTOR_CATEGORY_PARENT:
case GTK_CSS_SELECTOR_CATEGORY_SIBLING:
return FALSE;
default:
g_assert_not_reached ();
return FALSE;
}
}
static GHashTable *
gtk_css_selectors_count_initial_init (void)
{
@ -1764,7 +1790,7 @@ gtk_css_selectors_count_initial_init (void)
static void
gtk_css_selectors_count_initial (const GtkCssSelector *selector, GHashTable *hash_one)
{
if (!selector->class->is_simple)
if (!gtk_css_selector_is_simple (selector))
{
guint count = GPOINTER_TO_INT (g_hash_table_lookup (hash_one, selector));
g_hash_table_replace (hash_one, (gpointer)selector, GUINT_TO_POINTER (count + 1));
@ -1772,7 +1798,7 @@ gtk_css_selectors_count_initial (const GtkCssSelector *selector, GHashTable *has
}
for (;
selector && selector->class->is_simple;
selector && gtk_css_selector_is_simple (selector);
selector = gtk_css_selector_previous (selector))
{
guint count = GPOINTER_TO_INT (g_hash_table_lookup (hash_one, selector));
@ -1783,11 +1809,11 @@ gtk_css_selectors_count_initial (const GtkCssSelector *selector, GHashTable *has
static gboolean
gtk_css_selectors_has_initial_selector (const GtkCssSelector *selector, const GtkCssSelector *initial)
{
if (!selector->class->is_simple)
if (!gtk_css_selector_is_simple (selector))
return gtk_css_selector_equal (selector, initial);
for (;
selector && selector->class->is_simple;
selector && gtk_css_selector_is_simple (selector);
selector = gtk_css_selector_previous (selector))
{
if (gtk_css_selector_equal (selector, initial))
@ -1807,13 +1833,13 @@ gtk_css_selectors_skip_initial_selector (GtkCssSelector *selector, const GtkCssS
without losing any other selectors */
if (!gtk_css_selector_equal (selector, initial))
{
for (found = selector; found && found->class->is_simple; found = (GtkCssSelector *)gtk_css_selector_previous (found))
for (found = selector; found && gtk_css_selector_is_simple (found); found = (GtkCssSelector *)gtk_css_selector_previous (found))
{
if (gtk_css_selector_equal (found, initial))
break;
}
g_assert (found != NULL && found->class->is_simple);
g_assert (found != NULL && gtk_css_selector_is_simple (found));
tmp = *found;
*found = *selector;
@ -1866,7 +1892,7 @@ static gboolean
gtk_css_selector_match_for_change (const GtkCssSelector *selector,
const GtkCssMatcher *matcher)
{
if (selector->class->ignore_for_change)
if (selector->class->category != GTK_CSS_SELECTOR_CATEGORY_SIMPLE_RADICAL)
return TRUE;
return selector->class->match_one (selector, matcher);
@ -1909,7 +1935,7 @@ gtk_css_selector_tree_get_change (const GtkCssSelectorTree *tree,
if (!gtk_css_selector_match_for_change (&tree->selector, matcher))
return 0;
if (!tree->selector.class->is_simple)
if (!gtk_css_selector_is_simple (&tree->selector))
return gtk_css_selector_tree_collect_change (tree) | GTK_CSS_CHANGE_GOT_MATCH;
for (prev = gtk_css_selector_tree_get_previous (tree);
@ -2018,7 +2044,7 @@ _gtk_css_selector_tree_match_print (const GtkCssSelectorTree *tree,
/* print name and * selector before others */
for (iter = tree;
iter && iter->selector.class->is_simple;
iter && gtk_css_selector_is_simple (&iter->selector);
iter = gtk_css_selector_tree_get_parent (iter))
{
if (iter->selector.class == &GTK_CSS_SELECTOR_NAME ||
@ -2029,7 +2055,7 @@ _gtk_css_selector_tree_match_print (const GtkCssSelectorTree *tree,
}
/* now print other simple selectors */
for (iter = tree;
iter && iter->selector.class->is_simple;
iter && gtk_css_selector_is_simple (&iter->selector);
iter = gtk_css_selector_tree_get_parent (iter))
{
if (iter->selector.class != &GTK_CSS_SELECTOR_NAME &&