72 lines
2.8 KiB
JavaScript
72 lines
2.8 KiB
JavaScript
/*
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MIT License http://www.opensource.org/licenses/mit-license.php
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Author Tobias Koppers @sokra
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*/
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"use strict";
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const ContextDependencyHelpers = exports;
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/**
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* Escapes regular expression metacharacters
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* @param {string} str String to quote
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* @return {string} Escaped string
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*/
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function quotemeta(str) {
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return str.replace(/[-[\]\\/{}()*+?.^$|]/g, "\\$&");
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}
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ContextDependencyHelpers.create = function(Dep, range, param, expr, options, chunkName) {
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let dep;
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let prefix;
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let postfix;
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let prefixRange;
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let valueRange;
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let idx;
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let context;
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let regExp;
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if(param.isTemplateString()) {
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prefix = param.quasis[0].string;
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postfix = param.quasis.length > 1 ? param.quasis[param.quasis.length - 1].string : "";
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prefixRange = [param.quasis[0].range[0], param.quasis[0].range[1]];
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valueRange = param.range;
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idx = prefix.lastIndexOf("/");
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context = ".";
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if(idx >= 0) {
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context = prefix.substr(0, idx);
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prefix = `.${prefix.substr(idx)}`;
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}
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// If there are more than two quasis, maybe the generated RegExp can be more precise?
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regExp = new RegExp(`^${quotemeta(prefix)}${options.wrappedContextRegExp.source}${quotemeta(postfix)}$`);
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dep = new Dep(context, options.wrappedContextRecursive, regExp, range, valueRange, chunkName);
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dep.loc = expr.loc;
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dep.replaces = [{
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range: prefixRange,
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value: prefix
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}];
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dep.critical = options.wrappedContextCritical && "a part of the request of a dependency is an expression";
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return dep;
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} else if(param.isWrapped() && (param.prefix && param.prefix.isString() || param.postfix && param.postfix.isString())) {
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prefix = param.prefix && param.prefix.isString() ? param.prefix.string : "";
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postfix = param.postfix && param.postfix.isString() ? param.postfix.string : "";
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prefixRange = param.prefix && param.prefix.isString() ? param.prefix.range : null;
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valueRange = [prefixRange ? prefixRange[1] : param.range[0], param.range[1]];
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idx = prefix.lastIndexOf("/");
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context = ".";
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if(idx >= 0) {
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context = prefix.substr(0, idx);
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prefix = `.${prefix.substr(idx)}`;
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}
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regExp = new RegExp(`^${quotemeta(prefix)}${options.wrappedContextRegExp.source}${quotemeta(postfix)}$`);
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dep = new Dep(context, options.wrappedContextRecursive, regExp, range, valueRange, chunkName);
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dep.loc = expr.loc;
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dep.prepend = param.prefix && param.prefix.isString() ? prefix : null;
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dep.critical = options.wrappedContextCritical && "a part of the request of a dependency is an expression";
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return dep;
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} else {
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dep = new Dep(options.exprContextRequest, options.exprContextRecursive, options.exprContextRegExp, range, param.range, chunkName);
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dep.loc = expr.loc;
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dep.critical = options.exprContextCritical && "the request of a dependency is an expression";
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return dep;
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}
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};
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