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Only store selectors/media queries.

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This commit is contained in:
Natalie Weizenbaum 2016-07-15 16:22:39 -07:00
parent a3e00059c4
commit c5eb7f187b
1 changed files with 22 additions and 26 deletions
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48
lib/src/visitor/sass/statement/perform.dart
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@ -16,15 +16,11 @@ class PerformVisitor extends StatementVisitor {
final Environment _environment;
final PerformExpressionVisitor _expressionVisitor;
/// The innermost containing style rule, if one exists.
///
/// This will always have an empty list of children.
CssStyleRule _styleRule;
/// The current selector, if any.
CssValue<SelectorList> _selector;
/// The innermost containing media rule, if one exists.
///
/// This will always have an empty list of children.
CssMediaRule _mediaRule;
/// The current media queries, if any.
List<CssMediaQuery> _mediaQueries;
/// The root stylesheet node.
CssStylesheet _root;
@ -84,15 +80,14 @@ class PerformVisitor extends StatementVisitor {
void visitMediaRule(MediaRule node) {
var queryIterable = node.queries.map(_visitMediaQuery);
var queries = _mediaRule == null
var queries = _mediaQueries == null
? new List<CssMediaQuery>.unmodifiable(queryIterable)
: _mergeMediaQueries(_mediaRule.queries, queryIterable);
: _mergeMediaQueries(_mediaQueries, queryIterable);
if (queries.isEmpty) return;
var rule = new CssMediaRule(queries, span: node.span);
_withParent(
rule,
() => _withMediaRule(rule, () => super.visitMediaRule(node)),
new CssMediaRule(queries, span: node.span),
() => _withMediaQueries(queries, () => super.visitMediaRule(node)),
through: (node) => node is CssStyleRule || node is CssMediaRule,
removeIfEmpty: true);
}
@ -122,10 +117,10 @@ class PerformVisitor extends StatementVisitor {
void visitStyleRule(StyleRule node) {
var selectorText = _performInterpolation(node.selector, trim: true);
if (_styleRule != null) {
if (_selector != null) {
// TODO: semantically resolve parent references.
selectorText = new CssValue(
"${_styleRule.selector.value} ${selectorText.value}",
"${_selector.value} ${selectorText.value}",
span: node.selector.span);
}
@ -135,10 +130,9 @@ class PerformVisitor extends StatementVisitor {
new Parser(selectorText.value).parseSelector(),
span: node.selector.span);
var rule = new CssStyleRule(selector, span: node.span);
_withParent(
rule,
() => _withStyleRule(rule, () => super.visitStyleRule(node)),
new CssStyleRule(selector, span: node.span),
() => _withSelector(selector, () => super.visitStyleRule(node)),
through: (node) => node is CssStyleRule,
removeIfEmpty: true);
}
@ -185,19 +179,21 @@ class PerformVisitor extends StatementVisitor {
return result;
}
/*=T*/ _withStyleRule/*<T>*/(CssStyleRule rule, /*=T*/ callback()) {
var oldStyleRule = _styleRule;
_styleRule = rule;
/*=T*/ _withSelector/*<T>*/(CssValue<SelectorList> selector,
/*=T*/ callback()) {
var oldSelector = _selector;
_selector = selector;
var result = callback();
_styleRule = oldStyleRule;
_selector = oldSelector;
return result;
}
/*=T*/ _withMediaRule/*<T>*/(CssMediaRule rule, /*=T*/ callback()) {
var oldMediaRule = _mediaRule;
_mediaRule = rule;
/*=T*/ _withMediaQueries/*<T>*/(List<CssMediaQuery> queries,
/*=T*/ callback()) {
var oldMediaQueries = _mediaQueries;
_mediaQueries = queries;
var result = callback();
_mediaRule = oldMediaRule;
_mediaQueries = oldMediaQueries;
return result;
}
}