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css: Factor out some of the position matching code

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This commit is contained in:
Alexander Larsson 2012-12-07 18:55:49 +01:00
parent 57e1e0de94
commit 03c626bb15
1 changed files with 43 additions and 72 deletions
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115
gtk/gtkcssselector.c
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@ -1012,11 +1012,8 @@ gtk_css_selector_pseudoclass_position_print (const GtkCssSelector *selector,
}
static gboolean
gtk_css_selector_pseudoclass_position_match_for_region (const GtkCssSelector *selector,
const GtkCssMatcher *matcher)
get_selector_flags_for_position_region_match (const GtkCssSelector *selector, GtkRegionFlags *selector_flags)
{
GtkRegionFlags selector_flags;
const GtkCssSelector *previous;
PositionType type;
int a, b;
@ -1025,30 +1022,44 @@ gtk_css_selector_pseudoclass_position_match_for_region (const GtkCssSelector *se
{
case POSITION_FORWARD:
if (a == 0 && b == 1)
selector_flags = GTK_REGION_FIRST;
*selector_flags = GTK_REGION_FIRST;
else if (a == 2 && b == 0)
selector_flags = GTK_REGION_EVEN;
*selector_flags = GTK_REGION_EVEN;
else if (a == 2 && b == 1)
selector_flags = GTK_REGION_ODD;
*selector_flags = GTK_REGION_ODD;
else
return FALSE;
break;
case POSITION_BACKWARD:
if (a == 0 && b == 1)
selector_flags = GTK_REGION_LAST;
*selector_flags = GTK_REGION_LAST;
else
return FALSE;
break;
case POSITION_ONLY:
selector_flags = GTK_REGION_ONLY;
*selector_flags = GTK_REGION_ONLY;
break;
case POSITION_SORTED:
selector_flags = GTK_REGION_SORTED;
*selector_flags = GTK_REGION_SORTED;
break;
default:
g_assert_not_reached ();
break;
}
return TRUE;
}
static gboolean
gtk_css_selector_pseudoclass_position_match_for_region (const GtkCssSelector *selector,
const GtkCssMatcher *matcher)
{
GtkRegionFlags selector_flags;
const GtkCssSelector *previous;
if (!get_selector_flags_for_position_region_match (selector, &selector_flags))
return FALSE;
selector = gtk_css_selector_previous (selector);
if (!_gtk_css_matcher_has_region (matcher, selector->data, selector_flags))
@ -1063,17 +1074,12 @@ gtk_css_selector_pseudoclass_position_match_for_region (const GtkCssSelector *se
}
static gboolean
gtk_css_selector_pseudoclass_position_match (const GtkCssSelector *selector,
const GtkCssMatcher *matcher)
get_position_match (const GtkCssSelector *selector,
const GtkCssMatcher *matcher)
{
const GtkCssSelector *previous;
PositionType type;
int a, b;
previous = gtk_css_selector_previous (selector);
if (previous && previous->class == &GTK_CSS_SELECTOR_REGION)
return gtk_css_selector_pseudoclass_position_match_for_region (selector, matcher);
decode_position (selector, &type, &a, &b);
switch (type)
{
@ -1097,6 +1103,22 @@ gtk_css_selector_pseudoclass_position_match (const GtkCssSelector *selector,
return FALSE;
}
return TRUE;
}
static gboolean
gtk_css_selector_pseudoclass_position_match (const GtkCssSelector *selector,
const GtkCssMatcher *matcher)
{
const GtkCssSelector *previous;
previous = gtk_css_selector_previous (selector);
if (previous && previous->class == &GTK_CSS_SELECTOR_REGION)
return gtk_css_selector_pseudoclass_position_match_for_region (selector, matcher);
if (!get_position_match (selector, matcher))
return FALSE;
return gtk_css_selector_match (previous, matcher);
}
@ -1108,38 +1130,9 @@ gtk_css_selector_pseudoclass_position_tree_match_for_region (const GtkCssSelecto
{
const GtkCssSelectorTree *prev2;
GtkRegionFlags selector_flags;
PositionType type;
int a, b;
decode_position (&tree->selector, &type, &a, &b);
switch (type)
{
case POSITION_FORWARD:
if (a == 0 && b == 1)
selector_flags = GTK_REGION_FIRST;
else if (a == 2 && b == 0)
selector_flags = GTK_REGION_EVEN;
else if (a == 2 && b == 1)
selector_flags = GTK_REGION_ODD;
else
return;
break;
case POSITION_BACKWARD:
if (a == 0 && b == 1)
selector_flags = GTK_REGION_LAST;
else
return;
break;
case POSITION_ONLY:
selector_flags = GTK_REGION_ONLY;
break;
case POSITION_SORTED:
selector_flags = GTK_REGION_SORTED;
break;
default:
g_assert_not_reached ();
break;
}
if (!get_selector_flags_for_position_region_match (&tree->selector, &selector_flags))
return;
if (!_gtk_css_matcher_has_region (matcher, prev->selector.data, selector_flags))
return;
@ -1162,8 +1155,6 @@ gtk_css_selector_pseudoclass_position_tree_match (const GtkCssSelectorTree *tree
GHashTable *res)
{
const GtkCssSelectorTree *prev;
PositionType type;
int a, b;
for (prev = gtk_css_selector_tree_get_previous (tree);
prev != NULL;
@ -1173,28 +1164,8 @@ gtk_css_selector_pseudoclass_position_tree_match (const GtkCssSelectorTree *tree
gtk_css_selector_pseudoclass_position_tree_match_for_region (tree, prev, matcher, res);
}
decode_position (&tree->selector, &type, &a, &b);
switch (type)
{
case POSITION_FORWARD:
if (!_gtk_css_matcher_has_position (matcher, TRUE, a, b))
return;
break;
case POSITION_BACKWARD:
if (!_gtk_css_matcher_has_position (matcher, FALSE, a, b))
return;
break;
case POSITION_ONLY:
if (!_gtk_css_matcher_has_position (matcher, TRUE, 0, 1) ||
!_gtk_css_matcher_has_position (matcher, FALSE, 0, 1))
return;
break;
case POSITION_SORTED:
return;
default:
g_assert_not_reached ();
return;
}
if (!get_position_match (&tree->selector, matcher))
return;
gtk_css_selector_tree_found_match (tree, res);