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css: Compute selector tree changes ahead of time

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These only depend on the selector tree, so we can
compute them while constructing the tree.
This commit is contained in:
Matthias Clasen
2020-01-12 00:53:51 -05:00
parent 792130437e
commit 616c0ab8c5
1 changed files with 19 additions and 1 deletions
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20
gtk/gtkcssselector.c
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@@ -104,6 +104,7 @@ union _GtkCssSelector
struct _GtkCssSelectorTree
{
GtkCssSelector selector;
GtkCssChange change;
gint32 parent_offset;
gint32 previous_offset;
gint32 sibling_offset;
@@ -1874,7 +1875,7 @@ gtk_css_selector_tree_get_change (const GtkCssSelectorTree *tree,
return 0;
if (!tree->selector.class->is_simple)
return gtk_css_selector_tree_collect_change (tree) | GTK_CSS_CHANGE_GOT_MATCH;
return tree->change | GTK_CSS_CHANGE_GOT_MATCH;
for (prev = gtk_css_selector_tree_get_previous (tree);
prev != NULL;
@@ -2084,6 +2085,7 @@ subdivide_infos (GByteArray *array, GList *infos, gint32 parent_offset)
remaining = NULL;
tree = alloc_tree (array, &tree_offset);
tree->change = 0;
tree->parent_offset = parent_offset;
tree->selector = max_selector;
@@ -2193,6 +2195,20 @@ fixup_offsets (GtkCssSelectorTree *tree, guint8 *data)
}
}
static void
compute_change (GtkCssSelectorTree *tree)
{
for (; tree != NULL;
tree = (GtkCssSelectorTree *)gtk_css_selector_tree_get_sibling (tree))
{
GtkCssSelectorTree *prev = (GtkCssSelectorTree *)gtk_css_selector_tree_get_previous (tree);
tree->change = gtk_css_selector_tree_collect_change (tree);
compute_change (prev);
}
}
GtkCssSelectorTree *
_gtk_css_selector_tree_builder_build (GtkCssSelectorTreeBuilder *builder)
{
@@ -2216,6 +2232,8 @@ _gtk_css_selector_tree_builder_build (GtkCssSelectorTreeBuilder *builder)
fixup_offsets (tree, data);
compute_change (tree);
/* Convert offsets to final pointers */
for (l = builder->infos; l != NULL; l = l->next)
{