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Add pseudoClasses option #3

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44 changes: 44 additions & 0 deletions README.md
Original file line number Diff line number Diff line change
Expand Up @@ -111,5 +111,49 @@ Default: `&`

Ancestor selector base symbol

### replaceValues

Type `boolean`
Default: `false`

If this is true then this plugin will look through your declaration values for the placeholder symbol and replace them with the desired selector.

i.e.

```css
.foo {
background-color: red;

&:hover {
background-color: blue;

&::before {
content: '^&';
}
}
}
```

```
.foo {
background-color: red;
}

.foo:hover {
background-color: blue;
}

.foo:hover::before {
content: '.foo'
}
```

### pseudoClasses

Type `boolean`
Default: `false`

If this is true then pseudo classes (`&:hover`, `&:focus`) are included in the parent chain

## Todo's
- Add warning when nestingLevel >= parentsStack.length
18 changes: 17 additions & 1 deletion index.js
Original file line number Diff line number Diff line change
Expand Up @@ -4,7 +4,9 @@ var postcss = require('postcss'),

module.exports = postcss.plugin('postcss-nested-ancestors', function (opts) {
opts = assign({
placeholder: '^&'
placeholder: '^&',
replaceValues: false,
pseudoClasses: false
}, opts);

// Advanced options
Expand Down Expand Up @@ -34,6 +36,8 @@ module.exports = postcss.plugin('postcss-nested-ancestors', function (opts) {
function getParentSelectorAtLevel(nestingLevel) {
nestingLevel = nestingLevel || 1;

if (opts.pseudoClasses) nestingLevel -= 1;

// @TODO add warning when nestingLevel >= parentsStack.length

return parentsStack.filter( function (rule, index) {
Expand Down Expand Up @@ -85,6 +89,18 @@ module.exports = postcss.plugin('postcss-nested-ancestors', function (opts) {
// Replace parents placeholders in rule selector
rule.selectors = rule.selectors.map(replacePlaceholders);

if (opts.replaceValues) {
rule.nodes.forEach(function (ruleNode) {
if (ruleNode.type === 'decl') {
if (ruleNode.value.indexOf(opts.placeholder) >= 0) {
ruleNode.value = replacePlaceholders(
ruleNode.value
);
}
}
});
}

// Process child rules
process(rule);
}
Expand Down
18 changes: 18 additions & 0 deletions test.js
Original file line number Diff line number Diff line change
Expand Up @@ -43,6 +43,24 @@ test('Prepend 2 ancestors in double selector', t => {
);
});

test('Replace declaration values if replaceValues is true', t => {
return run( t,
'.a{ background: red; &:hover {&::before { content: "^&"; }}}',
'.a{ background: red; &:hover {&::before { content: ".a"; }}}',
{ replaceValues: true }
);
});

test('Take into account pseudo classes if pseudoClasses is true', t => {
return run( t,
'.a{ background: red; &:hover {&::before ' +
'{ content: "^&"; }}}',
'.a{ background: red; &:hover {&::before ' +
'{ content: ".a:hover"; }}}',
{ replaceValues: true, pseudoClasses: true }
);
});

test('Replace ancestors at different nesting levels', t => {
return run( t,
'.a{ &:hover{ ^&-b{} } .c{ .d{ ^&-e{} } } .z{} }',
Expand Down