aaac7fed
 liuqimichale
add
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'use strict';
function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
var Value = require('./value');
var OLD_LINEAR = /(^|[^-])linear-gradient\(\s*(top|left|right|bottom)/i;
var OLD_RADIAL = /(^|[^-])radial-gradient\(\s*\d+(\w*|%)\s+\d+(\w*|%)\s*,/i;
var SIZES = ['width', 'height', 'min-width', 'max-width', 'min-height', 'max-height', 'inline-size', 'min-inline-size', 'max-inline-size', 'block-size', 'min-block-size', 'max-block-size'];
var Processor = function () {
function Processor(prefixes) {
_classCallCheck(this, Processor);
this.prefixes = prefixes;
}
/**
* Add necessary prefixes
*/
Processor.prototype.add = function add(css, result) {
var _this = this;
// At-rules
var resolution = this.prefixes.add['@resolution'];
var keyframes = this.prefixes.add['@keyframes'];
var viewport = this.prefixes.add['@viewport'];
var supports = this.prefixes.add['@supports'];
css.walkAtRules(function (rule) {
if (rule.name === 'keyframes') {
if (!_this.disabled(rule, result)) {
return keyframes && keyframes.process(rule);
}
} else if (rule.name === 'viewport') {
if (!_this.disabled(rule, result)) {
return viewport && viewport.process(rule);
}
} else if (rule.name === 'supports') {
if (_this.prefixes.options.supports !== false && !_this.disabled(rule, result)) {
return supports.process(rule);
}
} else if (rule.name === 'media' && rule.params.indexOf('-resolution') !== -1) {
if (!_this.disabled(rule, result)) {
return resolution && resolution.process(rule);
}
}
return undefined;
});
// Selectors
css.walkRules(function (rule) {
if (_this.disabled(rule, result)) return undefined;
return _this.prefixes.add.selectors.map(function (selector) {
return selector.process(rule, result);
});
});
css.walkDecls(function (decl) {
if (_this.disabledDecl(decl, result)) return undefined;
if (decl.prop === 'display' && decl.value === 'box') {
result.warn('You should write display: flex by final spec ' + 'instead of display: box', { node: decl });
return undefined;
}
if (decl.value.indexOf('linear-gradient') !== -1) {
if (OLD_LINEAR.test(decl.value)) {
result.warn('Gradient has outdated direction syntax. ' + 'New syntax is like `to left` instead of `right`.', { node: decl });
}
}
if (decl.value.indexOf('radial-gradient') !== -1) {
if (OLD_RADIAL.test(decl.value)) {
result.warn('Gradient has outdated direction syntax. ' + 'New syntax is like `closest-side at 0 0` ' + 'instead of `0 0, closest-side`.', { node: decl });
} else if (/[^-]cover/.test(decl.value)) {
result.warn('Gradient has outdated direction syntax. ' + 'Replace `cover` to `farthest-corner`.', { node: decl });
} else if (/[^-]contain/.test(decl.value)) {
result.warn('Gradient has outdated direction syntax. ' + 'Replace `contain` to `closest-side`.', { node: decl });
}
}
if (decl.prop === 'text-emphasis-position') {
if (decl.value === 'under' || decl.value === 'over') {
result.warn('You should use 2 values for text-emphasis-position ' + 'For example, `under left` instead of just `under`.', { node: decl });
}
}
if (SIZES.indexOf(decl.prop) !== -1) {
if (decl.value.indexOf('fill-available') !== -1) {
result.warn('Replace fill-available to stretch, ' + 'because spec had been changed', { node: decl });
} else if (decl.value.indexOf('fill') !== -1) {
result.warn('Replace fill to stretch, ' + 'because spec had been changed', { node: decl });
}
}
var prefixer = void 0;
if (decl.prop === 'transition' || decl.prop === 'transition-property') {
// Transition
return _this.prefixes.transition.add(decl, result);
} else if (decl.prop === 'align-self') {
// align-self flexbox or grid
var display = _this.displayType(decl);
if (display !== 'grid' && _this.prefixes.options.flexbox !== false) {
prefixer = _this.prefixes.add['align-self'];
if (prefixer && prefixer.prefixes) {
prefixer.process(decl);
}
}
if (display !== 'flex' && _this.prefixes.options.grid !== false) {
prefixer = _this.prefixes.add['grid-row-align'];
if (prefixer && prefixer.prefixes) {
return prefixer.process(decl, result);
}
}
} else if (decl.prop === 'justify-self') {
// justify-self flexbox or grid
var _display = _this.displayType(decl);
if (_display !== 'flex' && _this.prefixes.options.grid !== false) {
prefixer = _this.prefixes.add['grid-column-align'];
if (prefixer && prefixer.prefixes) {
return prefixer.process(decl, result);
}
}
} else {
// Properties
prefixer = _this.prefixes.add[decl.prop];
if (prefixer && prefixer.prefixes) {
return prefixer.process(decl, result);
}
}
return undefined;
});
// Values
return css.walkDecls(function (decl) {
if (_this.disabledValue(decl, result)) return;
var unprefixed = _this.prefixes.unprefixed(decl.prop);
for (var _iterator = _this.prefixes.values('add', unprefixed), _isArray = Array.isArray(_iterator), _i = 0, _iterator = _isArray ? _iterator : _iterator[Symbol.iterator]();;) {
var _ref;
if (_isArray) {
if (_i >= _iterator.length) break;
_ref = _iterator[_i++];
} else {
_i = _iterator.next();
if (_i.done) break;
_ref = _i.value;
}
var value = _ref;
value.process(decl, result);
}
Value.save(_this.prefixes, decl);
});
};
/**
* Remove unnecessary pefixes
*/
Processor.prototype.remove = function remove(css, result) {
var _this2 = this;
// At-rules
var resolution = this.prefixes.remove['@resolution'];
css.walkAtRules(function (rule, i) {
if (_this2.prefixes.remove['@' + rule.name]) {
if (!_this2.disabled(rule, result)) {
rule.parent.removeChild(i);
}
} else if (rule.name === 'media' && rule.params.indexOf('-resolution') !== -1 && resolution) {
resolution.clean(rule);
}
});
// Selectors
var _loop = function _loop(checker) {
css.walkRules(function (rule, i) {
if (checker.check(rule)) {
if (!_this2.disabled(rule, result)) {
rule.parent.removeChild(i);
}
}
});
};
for (var _iterator2 = this.prefixes.remove.selectors, _isArray2 = Array.isArray(_iterator2), _i2 = 0, _iterator2 = _isArray2 ? _iterator2 : _iterator2[Symbol.iterator]();;) {
var _ref2;
if (_isArray2) {
if (_i2 >= _iterator2.length) break;
_ref2 = _iterator2[_i2++];
} else {
_i2 = _iterator2.next();
if (_i2.done) break;
_ref2 = _i2.value;
}
var checker = _ref2;
_loop(checker);
}
return css.walkDecls(function (decl, i) {
if (_this2.disabled(decl, result)) return;
var rule = decl.parent;
var unprefixed = _this2.prefixes.unprefixed(decl.prop);
// Transition
if (decl.prop === 'transition' || decl.prop === 'transition-property') {
_this2.prefixes.transition.remove(decl);
}
// Properties
if (_this2.prefixes.remove[decl.prop] && _this2.prefixes.remove[decl.prop].remove) {
var notHack = _this2.prefixes.group(decl).down(function (other) {
return _this2.prefixes.normalize(other.prop) === unprefixed;
});
if (unprefixed === 'flex-flow') {
notHack = true;
}
if (notHack && !_this2.withHackValue(decl)) {
if (decl.raw('before').indexOf('\n') > -1) {
_this2.reduceSpaces(decl);
}
rule.removeChild(i);
return;
}
}
// Values
for (var _iterator3 = _this2.prefixes.values('remove', unprefixed), _isArray3 = Array.isArray(_iterator3), _i3 = 0, _iterator3 = _isArray3 ? _iterator3 : _iterator3[Symbol.iterator]();;) {
var _ref3;
if (_isArray3) {
if (_i3 >= _iterator3.length) break;
_ref3 = _iterator3[_i3++];
} else {
_i3 = _iterator3.next();
if (_i3.done) break;
_ref3 = _i3.value;
}
var checker = _ref3;
if (!checker.check(decl.value)) {
continue;
}
unprefixed = checker.unprefixed;
var _notHack = _this2.prefixes.group(decl).down(function (other) {
return other.value.indexOf(unprefixed) !== -1;
});
if (_notHack) {
rule.removeChild(i);
return;
}
}
});
};
/**
* Some rare old values, which is not in standard
*/
Processor.prototype.withHackValue = function withHackValue(decl) {
return decl.prop === '-webkit-background-clip' && decl.value === 'text';
};
/**
* Check for grid/flexbox options.
*/
Processor.prototype.disabledValue = function disabledValue(node, result) {
if (this.prefixes.options.grid === false && node.type === 'decl') {
if (node.prop === 'display' && node.value.indexOf('grid') !== -1) {
return true;
}
}
if (this.prefixes.options.flexbox === false && node.type === 'decl') {
if (node.prop === 'display' && node.value.indexOf('flex') !== -1) {
return true;
}
}
return this.disabled(node, result);
};
/**
* Check for grid/flexbox options.
*/
Processor.prototype.disabledDecl = function disabledDecl(node, result) {
if (this.prefixes.options.grid === false && node.type === 'decl') {
if (node.prop.indexOf('grid') !== -1 || node.prop === 'justify-items') {
return true;
}
}
if (this.prefixes.options.flexbox === false && node.type === 'decl') {
var other = ['order', 'justify-content', 'align-items', 'align-content'];
if (node.prop.indexOf('flex') !== -1 || other.indexOf(node.prop) !== -1) {
return true;
}
}
return this.disabled(node, result);
};
/**
* Check for control comment and global options
*/
Processor.prototype.disabled = function disabled(node, result) {
if (!node) return false;
if (node._autoprefixerDisabled !== undefined) {
return node._autoprefixerDisabled;
}
if (node.nodes) {
var status = undefined;
node.each(function (i) {
if (i.type !== 'comment') return;
if (/(!\s*)?autoprefixer:\s*(off|on)/i.test(i.text)) {
if (typeof status !== 'undefined') {
result.warn('Second Autoprefixer control comment ' + 'was ignored. Autoprefixer applies control ' + 'comment to whole block, not to next rules.', { node: i });
} else {
status = /on/i.test(i.text);
}
}
});
var value = false;
if (status !== undefined) {
value = !status;
} else if (node.parent) {
value = this.disabled(node.parent, result);
}
node._autoprefixerDisabled = value;
return node._autoprefixerDisabled;
} else {
node._autoprefixerDisabled = this.disabled(node.parent, result);
return node._autoprefixerDisabled;
}
};
/**
* Normalize spaces in cascade declaration group
*/
Processor.prototype.reduceSpaces = function reduceSpaces(decl) {
var stop = false;
this.prefixes.group(decl).up(function () {
stop = true;
return true;
});
if (stop) {
return;
}
var parts = decl.raw('before').split('\n');
var prevMin = parts[parts.length - 1].length;
var diff = false;
this.prefixes.group(decl).down(function (other) {
parts = other.raw('before').split('\n');
var last = parts.length - 1;
if (parts[last].length > prevMin) {
if (diff === false) {
diff = parts[last].length - prevMin;
}
parts[last] = parts[last].slice(0, -diff);
other.raws.before = parts.join('\n');
}
});
};
/**
* Is it flebox or grid rule
*/
Processor.prototype.displayType = function displayType(decl) {
for (var _iterator4 = decl.parent.nodes, _isArray4 = Array.isArray(_iterator4), _i4 = 0, _iterator4 = _isArray4 ? _iterator4 : _iterator4[Symbol.iterator]();;) {
var _ref4;
if (_isArray4) {
if (_i4 >= _iterator4.length) break;
_ref4 = _iterator4[_i4++];
} else {
_i4 = _iterator4.next();
if (_i4.done) break;
_ref4 = _i4.value;
}
var i = _ref4;
if (i.prop !== 'display') {
continue;
}
if (i.value.indexOf('flex') !== -1) {
return 'flex';
}
if (i.value.indexOf('grid') !== -1) {
return 'grid';
}
}
return false;
};
return Processor;
}();
module.exports = Processor;
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