css: Track selected state separatelymatthiasc/css-change

Like the previous change, this reduces the number of
css nodes reacting to parent-state changes. The remaining
parent-state cases here are due to :link.

Before (numbers from widget-factory with Adwaita):
2247 nodes
class 612
name 2246
id 2
first-child 148
last-child 156
state 2245
hover 562
disabled 859
backdrop 1080
sibling-name 63
sibling-disabled 51
parent-class 586
parent-name 788
parent-id 2
parent-first-child 78
parent-last-child 78
parent-state 236
parent-hover 5
parent-disabled 91
parent-backdrop 4

After:
2247 nodes
class 612
name 2246
id 2
first-child 148
last-child 156
state 2245
hover 562
disabled 859
backdrop 1080
selected 579
sibling-name 63
sibling-disabled 51
parent-class 586
parent-name 788
parent-id 2
parent-first-child 78
parent-last-child 78
parent-state 115
parent-hover 5
parent-disabled 91
parent-backdrop 4
parent-selected 144

1 files changed, 10 insertions, 0 deletions

diff --git a/gtk/gtkcssselector.c b/gtk/gtkcssselector.c
index 3bd1e8044b..8c6465985c 100644
--- a/gtk/gtkcssselector.c
+++ b/gtk/gtkcssselector.c
@@ -748,6 +748,12 @@ DEFINE_SIMPLE_SELECTOR(pseudoclass_backdrop, PSEUDOCLASS_BACKDROP, print_pseudoc
                        FALSE, TRUE, FALSE)
 #undef GTK_CSS_CHANGE_PSEUDOCLASS_BACKDROP
 
+#define GTK_CSS_CHANGE_PSEUDOCLASS_SELECTED GTK_CSS_CHANGE_SELECTED
+DEFINE_SIMPLE_SELECTOR(pseudoclass_selected, PSEUDOCLASS_SELECTED, print_pseudoclass_state,
+                       match_pseudoclass_state, hash_pseudoclass_state, comp_pseudoclass_state,
+                       FALSE, TRUE, FALSE)
+#undef GTK_CSS_CHANGE_PSEUDOCLASS_SELECTED
+
 #define GTK_CSS_CHANGE_PSEUDOCLASS_STATE GTK_CSS_CHANGE_STATE
 DEFINE_SIMPLE_SELECTOR(pseudoclass_state, PSEUDOCLASS_STATE, print_pseudoclass_state,
                        match_pseudoclass_state, hash_pseudoclass_state, comp_pseudoclass_state,
@@ -1320,6 +1326,10 @@ gtk_css_selector_parse_selector_pseudo_class (GtkCssParser   *parser,
                     selector = gtk_css_selector_new (negate ? &GTK_CSS_SELECTOR_NOT_PSEUDOCLASS_BACKDROP
                                                             : &GTK_CSS_SELECTOR_PSEUDOCLASS_BACKDROP,
                                                      selector);
+                  else if (pseudo_classes[i].state_flag == GTK_STATE_FLAG_SELECTED)
+                    selector = gtk_css_selector_new (negate ? &GTK_CSS_SELECTOR_NOT_PSEUDOCLASS_SELECTED
+                                                            : &GTK_CSS_SELECTOR_PSEUDOCLASS_SELECTED,
+                                                     selector);
                   else 
                     selector = gtk_css_selector_new (negate ? &GTK_CSS_SELECTOR_NOT_PSEUDOCLASS_STATE
                                                             : &GTK_CSS_SELECTOR_PSEUDOCLASS_STATE,