supports.js
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(function() {
var Browsers, Supports, Value, brackets, browser, data, postcss, ref, support, supported, utils, version, versions;
Browsers = require('./browsers');
brackets = require('./brackets');
Value = require('./value');
utils = require('./utils');
postcss = require('postcss');
supported = [];
data = require('caniuse-db/features-json/css-featurequeries.json');
ref = data.stats;
for (browser in ref) {
versions = ref[browser];
for (version in versions) {
support = versions[version];
if (/y/.test(support)) {
supported.push(browser + ' ' + version);
}
}
}
Supports = (function() {
function Supports(Prefixes, all1) {
this.Prefixes = Prefixes;
this.all = all1;
}
Supports.prototype.prefixer = function() {
var browsers, filtered;
if (this.prefixerCache) {
return this.prefixerCache;
}
filtered = this.all.browsers.selected.filter((function(_this) {
return function(i) {
return supported.indexOf(i) !== -1;
};
})(this));
browsers = new Browsers(this.all.browsers.data, filtered, this.all.options);
return this.prefixerCache = new this.Prefixes(this.all.data, browsers, this.all.options);
};
Supports.prototype.parse = function(str) {
var prop, ref1, value;
ref1 = str.split(':'), prop = ref1[0], value = ref1[1];
value || (value = '');
return [prop.trim(), value.trim()];
};
Supports.prototype.virtual = function(str) {
var prop, ref1, rule, value;
ref1 = this.parse(str), prop = ref1[0], value = ref1[1];
rule = postcss.parse('a{}').first;
rule.append({
prop: prop,
value: value,
raws: {
before: ''
}
});
return rule;
};
Supports.prototype.prefixed = function(str) {
var decl, j, k, len, len1, prefixer, ref1, ref2, rule, value;
rule = this.virtual(str);
if (this.disabled(rule.first)) {
return rule.nodes;
}
prefixer = this.prefixer().add[rule.first.prop];
if (prefixer != null) {
if (typeof prefixer.process === "function") {
prefixer.process(rule.first);
}
}
ref1 = rule.nodes;
for (j = 0, len = ref1.length; j < len; j++) {
decl = ref1[j];
ref2 = this.prefixer().values('add', rule.first.prop);
for (k = 0, len1 = ref2.length; k < len1; k++) {
value = ref2[k];
value.process(decl);
}
Value.save(this.all, decl);
}
return rule.nodes;
};
Supports.prototype.isNot = function(node) {
return typeof node === 'string' && /not\s*/i.test(node);
};
Supports.prototype.isOr = function(node) {
return typeof node === 'string' && /\s*or\s*/i.test(node);
};
Supports.prototype.isProp = function(node) {
return typeof node === 'object' && node.length === 1 && typeof node[0] === 'string';
};
Supports.prototype.isHack = function(all, unprefixed) {
var check;
check = new RegExp('(\\(|\\s)' + utils.escapeRegexp(unprefixed) + ':');
return !check.test(all);
};
Supports.prototype.toRemove = function(str, all) {
var checker, j, len, prop, ref1, ref2, ref3, unprefixed, value;
ref1 = this.parse(str), prop = ref1[0], value = ref1[1];
unprefixed = this.all.unprefixed(prop);
if (((ref2 = this.all.cleaner().remove[prop]) != null ? ref2.remove : void 0) && !this.isHack(all, unprefixed)) {
return true;
}
ref3 = this.all.cleaner().values('remove', unprefixed);
for (j = 0, len = ref3.length; j < len; j++) {
checker = ref3[j];
if (checker.check(value)) {
return true;
}
}
return false;
};
Supports.prototype.remove = function(nodes, all) {
var i;
i = 0;
while (i < nodes.length) {
if (!this.isNot(nodes[i - 1]) && this.isProp(nodes[i]) && this.isOr(nodes[i + 1])) {
if (this.toRemove(nodes[i][0], all)) {
nodes.splice(i, 2);
} else {
i += 2;
}
} else {
if (typeof nodes[i] === 'object') {
nodes[i] = this.remove(nodes[i], all);
}
i += 1;
}
}
return nodes;
};
Supports.prototype.cleanBrackets = function(nodes) {
return nodes.map((function(_this) {
return function(i) {
if (typeof i === 'object') {
if (i.length === 1 && typeof i[0] === 'object') {
return _this.cleanBrackets(i[0]);
} else {
return _this.cleanBrackets(i);
}
} else {
return i;
}
};
})(this));
};
Supports.prototype.convert = function(progress) {
var i, j, len, result;
result = [''];
for (j = 0, len = progress.length; j < len; j++) {
i = progress[j];
result.push([i.prop + ": " + i.value]);
result.push(' or ');
}
result[result.length - 1] = '';
return result;
};
Supports.prototype.normalize = function(nodes) {
if (typeof nodes === 'object') {
nodes = nodes.filter(function(i) {
return i !== '';
});
if (typeof nodes[0] === 'string' && nodes[0].indexOf(':') !== -1) {
return [brackets.stringify(nodes)];
} else {
return nodes.map((function(_this) {
return function(i) {
return _this.normalize(i);
};
})(this));
}
} else {
return nodes;
}
};
Supports.prototype.add = function(nodes, all) {
return nodes.map((function(_this) {
return function(i) {
var prefixed;
if (_this.isProp(i)) {
prefixed = _this.prefixed(i[0]);
if (prefixed.length > 1) {
return _this.convert(prefixed);
} else {
return i;
}
} else if (typeof i === 'object') {
return _this.add(i, all);
} else {
return i;
}
};
})(this));
};
Supports.prototype.process = function(rule) {
var ast;
ast = brackets.parse(rule.params);
ast = this.normalize(ast);
ast = this.remove(ast, rule.params);
ast = this.add(ast, rule.params);
ast = this.cleanBrackets(ast);
return rule.params = brackets.stringify(ast);
};
Supports.prototype.disabled = function(node) {
var other;
if (this.all.options.grid === false) {
if (node.prop === 'display' && node.value.indexOf('grid') !== -1) {
return true;
}
if (node.prop.indexOf('grid') !== -1 || node.prop === 'justify-items') {
return true;
}
}
if (this.all.options.flexbox === false) {
if (node.prop === 'display' && node.value.indexOf('flex') !== -1) {
return true;
}
other = ['order', 'justify-content', 'align-items', 'align-content'];
if (node.prop.indexOf('flex') !== -1 || other.indexOf(node.prop) !== -1) {
return true;
}
}
return false;
};
return Supports;
})();
module.exports = Supports;
}).call(this);