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Clean up style rule tracking.

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This commit is contained in:
Natalie Weizenbaum 2016-07-08 17:36:14 -07:00
parent d69839080e
commit 6022128372
1 changed files with 14 additions and 15 deletions
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29
lib/src/visitor/sass/statement/perform.dart
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@ -19,9 +19,8 @@ class PerformVisitor extends StatementVisitor {
final Environment _environment;
final PerformExpressionVisitor _expressionVisitor;
/// Style rules containing the currently visited node, from outermost to
/// innermost.
var _styleRules = <CssStyleRule>[];
/// The innermost containing style rule, if one exists.
CssStyleRule _styleRule;
/// The children of the root stylesheet node.
///
@ -120,10 +119,10 @@ class PerformVisitor extends StatementVisitor {
void visitStyleRule(StyleRule node) {
var selectorText = _performInterpolation(node.selector, trim: true);
if (_styleRules.isNotEmpty) {
if (_styleRule != null) {
// TODO: semantically resolve parent references.
selectorText = new CssValue(
"${_styleRules.last.selector.value} ${selectorText.value}",
"${_styleRule.selector.value} ${selectorText.value}",
span: node.selector.span);
}
@ -137,9 +136,9 @@ class PerformVisitor extends StatementVisitor {
// rule before any of its children.
var insertionPoint = _outerChildren.isEmpty ? null : _outerChildren.last;
_styleRules.add(new CssStyleRule(selector, [], span: node.span));
var children = _collectChildren(() => super.visitStyleRule(node));
_styleRules.removeLast();
var children = _withStyleRule(
new CssStyleRule(selector, [], span: node.span),
() => _collectChildren(() => super.visitStyleRule(node)));
if (children.isEmpty) return;
var rule = new CssStyleRule(selector, children, span: node.span);
@ -171,17 +170,17 @@ class PerformVisitor extends StatementVisitor {
list.add(new LinkedListValue(node));
}
/*=T*/ _resetStyleRules/*<T>*/(/*=T*/ callback()) {
var oldStyleRules = _styleRules;
_styleRules = [];
/*=T*/ _withStyleRule/*<T>*/(CssStyleRule rule, /*=T*/ callback()) {
var oldStyleRule = _styleRule;
_styleRule = rule;
var result = callback();
_styleRules = oldStyleRules;
_styleRule = oldStyleRule;
return result;
}
/// Like [_collectChildren], but handles bubbling.
Iterable<CssNode> _atRuleChildren(void callback()) {
if (_styleRules.isEmpty) return _collectChildren(callback);
if (_styleRule == null) return _collectChildren(callback);
return _scope(() {
_outerChildren = new LinkedList();
@ -191,9 +190,9 @@ class PerformVisitor extends StatementVisitor {
if (_innerChildren.isNotEmpty) {
_outerChildren.addFirst(new LinkedListValue(new CssStyleRule(
_styleRules.last.selector,
_styleRule.selector,
_innerChildren.map((node) => node.value),
span: _styleRules.last.span)));
span: _styleRule.span)));
}
return _outerChildren.map((node) => node.value);