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Leaner CSS
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JavaScript
"use strict";
Object.defineProperty(exports, "__esModule", { value: true });
var tslib_1 = require("tslib");
var node_1 = tslib_1.__importDefault(require("./node"));
var declaration_1 = tslib_1.__importDefault(require("./declaration"));
var keyword_1 = tslib_1.__importDefault(require("./keyword"));
var comment_1 = tslib_1.__importDefault(require("./comment"));
var paren_1 = tslib_1.__importDefault(require("./paren"));
var selector_1 = tslib_1.__importDefault(require("./selector"));
var element_1 = tslib_1.__importDefault(require("./element"));
var anonymous_1 = tslib_1.__importDefault(require("./anonymous"));
var contexts_1 = tslib_1.__importDefault(require("../contexts"));
var function_registry_1 = tslib_1.__importDefault(require("../functions/function-registry"));
var default_1 = tslib_1.__importDefault(require("../functions/default"));
var debug_info_1 = tslib_1.__importDefault(require("./debug-info"));
var utils = tslib_1.__importStar(require("../utils"));
var parser_1 = tslib_1.__importDefault(require("../parser/parser"));
var Ruleset = function (selectors, rules, strictImports, visibilityInfo) {
this.selectors = selectors;
this.rules = rules;
this._lookups = {};
this._variables = null;
this._properties = null;
this.strictImports = strictImports;
this.copyVisibilityInfo(visibilityInfo);
this.allowRoot = true;
this.setParent(this.selectors, this);
this.setParent(this.rules, this);
};
Ruleset.prototype = Object.assign(new node_1.default(), {
type: 'Ruleset',
isRuleset: true,
isRulesetLike: function () { return true; },
accept: function (visitor) {
if (this.paths) {
this.paths = visitor.visitArray(this.paths, true);
}
else if (this.selectors) {
this.selectors = visitor.visitArray(this.selectors);
}
if (this.rules && this.rules.length) {
this.rules = visitor.visitArray(this.rules);
}
},
eval: function (context) {
var selectors;
var selCnt;
var selector;
var i;
var hasVariable;
var hasOnePassingSelector = false;
if (this.selectors && (selCnt = this.selectors.length)) {
selectors = new Array(selCnt);
default_1.default.error({
type: 'Syntax',
message: 'it is currently only allowed in parametric mixin guards,'
});
for (i = 0; i < selCnt; i++) {
selector = this.selectors[i].eval(context);
for (var j = 0; j < selector.elements.length; j++) {
if (selector.elements[j].isVariable) {
hasVariable = true;
break;
}
}
selectors[i] = selector;
if (selector.evaldCondition) {
hasOnePassingSelector = true;
}
}
if (hasVariable) {
var toParseSelectors = new Array(selCnt);
for (i = 0; i < selCnt; i++) {
selector = selectors[i];
toParseSelectors[i] = selector.toCSS(context);
}
var startingIndex = selectors[0].getIndex();
var selectorFileInfo = selectors[0].fileInfo();
new parser_1.default(context, this.parse.importManager, selectorFileInfo, startingIndex).parseNode(toParseSelectors.join(','), ['selectors'], function (err, result) {
if (result) {
selectors = utils.flattenArray(result);
}
});
}
default_1.default.reset();
}
else {
hasOnePassingSelector = true;
}
var rules = this.rules ? utils.copyArray(this.rules) : null;
var ruleset = new Ruleset(selectors, rules, this.strictImports, this.visibilityInfo());
var rule;
var subRule;
ruleset.originalRuleset = this;
ruleset.root = this.root;
ruleset.firstRoot = this.firstRoot;
ruleset.allowImports = this.allowImports;
if (this.debugInfo) {
ruleset.debugInfo = this.debugInfo;
}
if (!hasOnePassingSelector) {
rules.length = 0;
}
// inherit a function registry from the frames stack when possible;
// otherwise from the global registry
ruleset.functionRegistry = (function (frames) {
var i = 0;
var n = frames.length;
var found;
for (; i !== n; ++i) {
found = frames[i].functionRegistry;
if (found) {
return found;
}
}
return function_registry_1.default;
}(context.frames)).inherit();
// push the current ruleset to the frames stack
var ctxFrames = context.frames;
ctxFrames.unshift(ruleset);
// currrent selectors
var ctxSelectors = context.selectors;
if (!ctxSelectors) {
context.selectors = ctxSelectors = [];
}
ctxSelectors.unshift(this.selectors);
// Evaluate imports
if (ruleset.root || ruleset.allowImports || !ruleset.strictImports) {
ruleset.evalImports(context);
}
// Store the frames around mixin definitions,
// so they can be evaluated like closures when the time comes.
var rsRules = ruleset.rules;
for (i = 0; (rule = rsRules[i]); i++) {
if (rule.evalFirst) {
rsRules[i] = rule.eval(context);
}
}
var mediaBlockCount = (context.mediaBlocks && context.mediaBlocks.length) || 0;
// Evaluate mixin calls.
for (i = 0; (rule = rsRules[i]); i++) {
if (rule.type === 'MixinCall') {
/* jshint loopfunc:true */
rules = rule.eval(context).filter(function (r) {
if ((r instanceof declaration_1.default) && r.variable) {
// do not pollute the scope if the variable is
// already there. consider returning false here
// but we need a way to "return" variable from mixins
return !(ruleset.variable(r.name));
}
return true;
});
rsRules.splice.apply(rsRules, [i, 1].concat(rules));
i += rules.length - 1;
ruleset.resetCache();
}
else if (rule.type === 'VariableCall') {
/* jshint loopfunc:true */
rules = rule.eval(context).rules.filter(function (r) {
if ((r instanceof declaration_1.default) && r.variable) {
// do not pollute the scope at all
return false;
}
return true;
});
rsRules.splice.apply(rsRules, [i, 1].concat(rules));
i += rules.length - 1;
ruleset.resetCache();
}
}
// Evaluate everything else
for (i = 0; (rule = rsRules[i]); i++) {
if (!rule.evalFirst) {
rsRules[i] = rule = rule.eval ? rule.eval(context) : rule;
}
}
// Evaluate everything else
for (i = 0; (rule = rsRules[i]); i++) {
// for rulesets, check if it is a css guard and can be removed
if (rule instanceof Ruleset && rule.selectors && rule.selectors.length === 1) {
// check if it can be folded in (e.g. & where)
if (rule.selectors[0] && rule.selectors[0].isJustParentSelector()) {
rsRules.splice(i--, 1);
for (var j = 0; (subRule = rule.rules[j]); j++) {
if (subRule instanceof node_1.default) {
subRule.copyVisibilityInfo(rule.visibilityInfo());
if (!(subRule instanceof declaration_1.default) || !subRule.variable) {
rsRules.splice(++i, 0, subRule);
}
}
}
}
}
}
// Pop the stack
ctxFrames.shift();
ctxSelectors.shift();
if (context.mediaBlocks) {
for (i = mediaBlockCount; i < context.mediaBlocks.length; i++) {
context.mediaBlocks[i].bubbleSelectors(selectors);
}
}
return ruleset;
},
evalImports: function (context) {
var rules = this.rules;
var i;
var importRules;
if (!rules) {
return;
}
for (i = 0; i < rules.length; i++) {
if (rules[i].type === 'Import') {
importRules = rules[i].eval(context);
if (importRules && (importRules.length || importRules.length === 0)) {
rules.splice.apply(rules, [i, 1].concat(importRules));
i += importRules.length - 1;
}
else {
rules.splice(i, 1, importRules);
}
this.resetCache();
}
}
},
makeImportant: function () {
var result = new Ruleset(this.selectors, this.rules.map(function (r) {
if (r.makeImportant) {
return r.makeImportant();
}
else {
return r;
}
}), this.strictImports, this.visibilityInfo());
return result;
},
matchArgs: function (args) {
return !args || args.length === 0;
},
// lets you call a css selector with a guard
matchCondition: function (args, context) {
var lastSelector = this.selectors[this.selectors.length - 1];
if (!lastSelector.evaldCondition) {
return false;
}
if (lastSelector.condition &&
!lastSelector.condition.eval(new contexts_1.default.Eval(context, context.frames))) {
return false;
}
return true;
},
resetCache: function () {
this._rulesets = null;
this._variables = null;
this._properties = null;
this._lookups = {};
},
variables: function () {
if (!this._variables) {
this._variables = !this.rules ? {} : this.rules.reduce(function (hash, r) {
if (r instanceof declaration_1.default && r.variable === true) {
hash[r.name] = r;
}
// when evaluating variables in an import statement, imports have not been eval'd
// so we need to go inside import statements.
// guard against root being a string (in the case of inlined less)
if (r.type === 'Import' && r.root && r.root.variables) {
var vars = r.root.variables();
for (var name_1 in vars) {
// eslint-disable-next-line no-prototype-builtins
if (vars.hasOwnProperty(name_1)) {
hash[name_1] = r.root.variable(name_1);
}
}
}
return hash;
}, {});
}
return this._variables;
},
properties: function () {
if (!this._properties) {
this._properties = !this.rules ? {} : this.rules.reduce(function (hash, r) {
if (r instanceof declaration_1.default && r.variable !== true) {
var name_2 = (r.name.length === 1) && (r.name[0] instanceof keyword_1.default) ?
r.name[0].value : r.name;
// Properties don't overwrite as they can merge
if (!hash["$".concat(name_2)]) {
hash["$".concat(name_2)] = [r];
}
else {
hash["$".concat(name_2)].push(r);
}
}
return hash;
}, {});
}
return this._properties;
},
variable: function (name) {
var decl = this.variables()[name];
if (decl) {
return this.parseValue(decl);
}
},
property: function (name) {
var decl = this.properties()[name];
if (decl) {
return this.parseValue(decl);
}
},
lastDeclaration: function () {
for (var i = this.rules.length; i > 0; i--) {
var decl = this.rules[i - 1];
if (decl instanceof declaration_1.default) {
return this.parseValue(decl);
}
}
},
parseValue: function (toParse) {
var self = this;
function transformDeclaration(decl) {
if (decl.value instanceof anonymous_1.default && !decl.parsed) {
if (typeof decl.value.value === 'string') {
new parser_1.default(this.parse.context, this.parse.importManager, decl.fileInfo(), decl.value.getIndex()).parseNode(decl.value.value, ['value', 'important'], function (err, result) {
if (err) {
decl.parsed = true;
}
if (result) {
decl.value = result[0];
decl.important = result[1] || '';
decl.parsed = true;
}
});
}
else {
decl.parsed = true;
}
return decl;
}
else {
return decl;
}
}
if (!Array.isArray(toParse)) {
return transformDeclaration.call(self, toParse);
}
else {
var nodes_1 = [];
toParse.forEach(function (n) {
nodes_1.push(transformDeclaration.call(self, n));
});
return nodes_1;
}
},
rulesets: function () {
if (!this.rules) {
return [];
}
var filtRules = [];
var rules = this.rules;
var i;
var rule;
for (i = 0; (rule = rules[i]); i++) {
if (rule.isRuleset) {
filtRules.push(rule);
}
}
return filtRules;
},
prependRule: function (rule) {
var rules = this.rules;
if (rules) {
rules.unshift(rule);
}
else {
this.rules = [rule];
}
this.setParent(rule, this);
},
find: function (selector, self, filter) {
self = self || this;
var rules = [];
var match;
var foundMixins;
var key = selector.toCSS();
if (key in this._lookups) {
return this._lookups[key];
}
this.rulesets().forEach(function (rule) {
if (rule !== self) {
for (var j = 0; j < rule.selectors.length; j++) {
match = selector.match(rule.selectors[j]);
if (match) {
if (selector.elements.length > match) {
if (!filter || filter(rule)) {
foundMixins = rule.find(new selector_1.default(selector.elements.slice(match)), self, filter);
for (var i = 0; i < foundMixins.length; ++i) {
foundMixins[i].path.push(rule);
}
Array.prototype.push.apply(rules, foundMixins);
}
}
else {
rules.push({ rule: rule, path: [] });
}
break;
}
}
}
});
this._lookups[key] = rules;
return rules;
},
genCSS: function (context, output) {
var i;
var j;
var charsetRuleNodes = [];
var ruleNodes = [];
var // Line number debugging
debugInfo;
var rule;
var path;
context.tabLevel = (context.tabLevel || 0);
if (!this.root) {
context.tabLevel++;
}
var tabRuleStr = context.compress ? '' : Array(context.tabLevel + 1).join(' ');
var tabSetStr = context.compress ? '' : Array(context.tabLevel).join(' ');
var sep;
var charsetNodeIndex = 0;
var importNodeIndex = 0;
for (i = 0; (rule = this.rules[i]); i++) {
if (rule instanceof comment_1.default) {
if (importNodeIndex === i) {
importNodeIndex++;
}
ruleNodes.push(rule);
}
else if (rule.isCharset && rule.isCharset()) {
ruleNodes.splice(charsetNodeIndex, 0, rule);
charsetNodeIndex++;
importNodeIndex++;
}
else if (rule.type === 'Import') {
ruleNodes.splice(importNodeIndex, 0, rule);
importNodeIndex++;
}
else {
ruleNodes.push(rule);
}
}
ruleNodes = charsetRuleNodes.concat(ruleNodes);
// If this is the root node, we don't render
// a selector, or {}.
if (!this.root) {
debugInfo = (0, debug_info_1.default)(context, this, tabSetStr);
if (debugInfo) {
output.add(debugInfo);
output.add(tabSetStr);
}
var paths = this.paths;
var pathCnt = paths.length;
var pathSubCnt = void 0;
sep = context.compress ? ',' : (",\n".concat(tabSetStr));
for (i = 0; i < pathCnt; i++) {
path = paths[i];
if (!(pathSubCnt = path.length)) {
continue;
}
if (i > 0) {
output.add(sep);
}
context.firstSelector = true;
path[0].genCSS(context, output);
context.firstSelector = false;
for (j = 1; j < pathSubCnt; j++) {
path[j].genCSS(context, output);
}
}
output.add((context.compress ? '{' : ' {\n') + tabRuleStr);
}
// Compile rules and rulesets
for (i = 0; (rule = ruleNodes[i]); i++) {
if (i + 1 === ruleNodes.length) {
context.lastRule = true;
}
var currentLastRule = context.lastRule;
if (rule.isRulesetLike(rule)) {
context.lastRule = false;
}
if (rule.genCSS) {
rule.genCSS(context, output);
}
else if (rule.value) {
output.add(rule.value.toString());
}
context.lastRule = currentLastRule;
if (!context.lastRule && rule.isVisible()) {
output.add(context.compress ? '' : ("\n".concat(tabRuleStr)));
}
else {
context.lastRule = false;
}
}
if (!this.root) {
output.add((context.compress ? '}' : "\n".concat(tabSetStr, "}")));
context.tabLevel--;
}
if (!output.isEmpty() && !context.compress && this.firstRoot) {
output.add('\n');
}
},
joinSelectors: function (paths, context, selectors) {
for (var s = 0; s < selectors.length; s++) {
this.joinSelector(paths, context, selectors[s]);
}
},
joinSelector: function (paths, context, selector) {
function createParenthesis(elementsToPak, originalElement) {
var replacementParen, j;
if (elementsToPak.length === 0) {
replacementParen = new paren_1.default(elementsToPak[0]);
}
else {
var insideParent = new Array(elementsToPak.length);
for (j = 0; j < elementsToPak.length; j++) {
insideParent[j] = new element_1.default(null, elementsToPak[j], originalElement.isVariable, originalElement._index, originalElement._fileInfo);
}
replacementParen = new paren_1.default(new selector_1.default(insideParent));
}
return replacementParen;
}
function createSelector(containedElement, originalElement) {
var element, selector;
element = new element_1.default(null, containedElement, originalElement.isVariable, originalElement._index, originalElement._fileInfo);
selector = new selector_1.default([element]);
return selector;
}
// joins selector path from `beginningPath` with selector path in `addPath`
// `replacedElement` contains element that is being replaced by `addPath`
// returns concatenated path
function addReplacementIntoPath(beginningPath, addPath, replacedElement, originalSelector) {
var newSelectorPath, lastSelector, newJoinedSelector;
// our new selector path
newSelectorPath = [];
// construct the joined selector - if & is the first thing this will be empty,
// if not newJoinedSelector will be the last set of elements in the selector
if (beginningPath.length > 0) {
newSelectorPath = utils.copyArray(beginningPath);
lastSelector = newSelectorPath.pop();
newJoinedSelector = originalSelector.createDerived(utils.copyArray(lastSelector.elements));
}
else {
newJoinedSelector = originalSelector.createDerived([]);
}
if (addPath.length > 0) {
// /deep/ is a CSS4 selector - (removed, so should deprecate)
// that is valid without anything in front of it
// so if the & does not have a combinator that is "" or " " then
// and there is a combinator on the parent, then grab that.
// this also allows + a { & .b { .a & { ... though not sure why you would want to do that
var combinator = replacedElement.combinator;
var parentEl = addPath[0].elements[0];
if (combinator.emptyOrWhitespace && !parentEl.combinator.emptyOrWhitespace) {
combinator = parentEl.combinator;
}
// join the elements so far with the first part of the parent
newJoinedSelector.elements.push(new element_1.default(combinator, parentEl.value, replacedElement.isVariable, replacedElement._index, replacedElement._fileInfo));
newJoinedSelector.elements = newJoinedSelector.elements.concat(addPath[0].elements.slice(1));
}
// now add the joined selector - but only if it is not empty
if (newJoinedSelector.elements.length !== 0) {
newSelectorPath.push(newJoinedSelector);
}
// put together the parent selectors after the join (e.g. the rest of the parent)
if (addPath.length > 1) {
var restOfPath = addPath.slice(1);
restOfPath = restOfPath.map(function (selector) {
return selector.createDerived(selector.elements, []);
});
newSelectorPath = newSelectorPath.concat(restOfPath);
}
return newSelectorPath;
}
// joins selector path from `beginningPath` with every selector path in `addPaths` array
// `replacedElement` contains element that is being replaced by `addPath`
// returns array with all concatenated paths
function addAllReplacementsIntoPath(beginningPath, addPaths, replacedElement, originalSelector, result) {
var j;
for (j = 0; j < beginningPath.length; j++) {
var newSelectorPath = addReplacementIntoPath(beginningPath[j], addPaths, replacedElement, originalSelector);
result.push(newSelectorPath);
}
return result;
}
function mergeElementsOnToSelectors(elements, selectors) {
var i, sel;
if (elements.length === 0) {
return;
}
if (selectors.length === 0) {
selectors.push([new selector_1.default(elements)]);
return;
}
for (i = 0; (sel = selectors[i]); i++) {
// if the previous thing in sel is a parent this needs to join on to it
if (sel.length > 0) {
sel[sel.length - 1] = sel[sel.length - 1].createDerived(sel[sel.length - 1].elements.concat(elements));
}
else {
sel.push(new selector_1.default(elements));
}
}
}
// replace all parent selectors inside `inSelector` by content of `context` array
// resulting selectors are returned inside `paths` array
// returns true if `inSelector` contained at least one parent selector
function replaceParentSelector(paths, context, inSelector) {
// The paths are [[Selector]]
// The first list is a list of comma separated selectors
// The inner list is a list of inheritance separated selectors
// e.g.
// .a, .b {
// .c {
// }
// }
// == [[.a] [.c]] [[.b] [.c]]
//
var i, j, k, currentElements, newSelectors, selectorsMultiplied, sel, el, hadParentSelector = false, length, lastSelector;
function findNestedSelector(element) {
var maybeSelector;
if (!(element.value instanceof paren_1.default)) {
return null;
}
maybeSelector = element.value.value;
if (!(maybeSelector instanceof selector_1.default)) {
return null;
}
return maybeSelector;
}
// the elements from the current selector so far
currentElements = [];
// the current list of new selectors to add to the path.
// We will build it up. We initiate it with one empty selector as we "multiply" the new selectors
// by the parents
newSelectors = [
[]
];
for (i = 0; (el = inSelector.elements[i]); i++) {
// non parent reference elements just get added
if (el.value !== '&') {
var nestedSelector = findNestedSelector(el);
if (nestedSelector !== null) {
// merge the current list of non parent selector elements
// on to the current list of selectors to add
mergeElementsOnToSelectors(currentElements, newSelectors);
var nestedPaths = [];
var replaced = void 0;
var replacedNewSelectors = [];
replaced = replaceParentSelector(nestedPaths, context, nestedSelector);
hadParentSelector = hadParentSelector || replaced;
// the nestedPaths array should have only one member - replaceParentSelector does not multiply selectors
for (k = 0; k < nestedPaths.length; k++) {
var replacementSelector = createSelector(createParenthesis(nestedPaths[k], el), el);
addAllReplacementsIntoPath(newSelectors, [replacementSelector], el, inSelector, replacedNewSelectors);
}
newSelectors = replacedNewSelectors;
currentElements = [];
}
else {
currentElements.push(el);
}
}
else {
hadParentSelector = true;
// the new list of selectors to add
selectorsMultiplied = [];
// merge the current list of non parent selector elements
// on to the current list of selectors to add
mergeElementsOnToSelectors(currentElements, newSelectors);
// loop through our current selectors
for (j = 0; j < newSelectors.length; j++) {
sel = newSelectors[j];
// if we don't have any parent paths, the & might be in a mixin so that it can be used
// whether there are parents or not
if (context.length === 0) {
// the combinator used on el should now be applied to the next element instead so that
// it is not lost
if (sel.length > 0) {
sel[0].elements.push(new element_1.default(el.combinator, '', el.isVariable, el._index, el._fileInfo));
}
selectorsMultiplied.push(sel);
}
else {
// and the parent selectors
for (k = 0; k < context.length; k++) {
// We need to put the current selectors
// then join the last selector's elements on to the parents selectors
var newSelectorPath = addReplacementIntoPath(sel, context[k], el, inSelector);
// add that to our new set of selectors
selectorsMultiplied.push(newSelectorPath);
}
}
}
// our new selectors has been multiplied, so reset the state
newSelectors = selectorsMultiplied;
currentElements = [];
}
}
// if we have any elements left over (e.g. .a& .b == .b)
// add them on to all the current selectors
mergeElementsOnToSelectors(currentElements, newSelectors);
for (i = 0; i < newSelectors.length; i++) {
length = newSelectors[i].length;
if (length > 0) {
paths.push(newSelectors[i]);
lastSelector = newSelectors[i][length - 1];
newSelectors[i][length - 1] = lastSelector.createDerived(lastSelector.elements, inSelector.extendList);
}
}
return hadParentSelector;
}
function deriveSelector(visibilityInfo, deriveFrom) {
var newSelector = deriveFrom.createDerived(deriveFrom.elements, deriveFrom.extendList, deriveFrom.evaldCondition);
newSelector.copyVisibilityInfo(visibilityInfo);
return newSelector;
}
// joinSelector code follows
var i, newPaths, hadParentSelector;
newPaths = [];
hadParentSelector = replaceParentSelector(newPaths, context, selector);
if (!hadParentSelector) {
if (context.length > 0) {
newPaths = [];
for (i = 0; i < context.length; i++) {
var concatenated = context[i].map(deriveSelector.bind(this, selector.visibilityInfo()));
concatenated.push(selector);
newPaths.push(concatenated);
}
}
else {
newPaths = [[selector]];
}
}
for (i = 0; i < newPaths.length; i++) {
paths.push(newPaths[i]);
}
}
});
exports.default = Ruleset;
//# sourceMappingURL=ruleset.js.map