init

node_modules/postcss-helpers/lib/url.js

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+'use strict';
+
+// using URLjs because I don't want to think about all this:
+// http://blog.lunatech.com/2009/02/03/what-every-web-developer-must-know-about-url-encoding
+var URI    = require( 'urijs' );
+var regexp = require( './regexp' );
+
+/**
+ * UrlHelper constructor
+ * @constructor
+ * @param {String} rule CSS rule with url().
+ */
+var UrlHelper = function ( rule ) {
+    var exports = {};
+
+    if ( ! ( this instanceof UrlHelper ) ) {
+        return new UrlHelper( rule );
+    }
+
+    this._originalURI = this._extractURI( rule );
+
+    if ( !this._originalURI && this._originalURI !== '') { return false; }
+
+    this._originalRule = rule;
+
+    this.URI = URI( this._originalURI );
+
+    exports.URI             = this.URI;
+    exports.getOriginalURI  = this.getOriginalURI.bind(  this );
+    exports.getModifiedRule = this.getModifiedRule.bind( this );
+    exports.getOriginalRule = this.getOriginalRule.bind( this );
+
+    return exports;
+};
+
+/**
+ * Extracts URI from rule.
+ * @private
+ * @param   {String} rule String to test.
+ * @returns {String|undefined} Returns URI value or undefined.
+ */
+UrlHelper.prototype._extractURI = function( rule ) {
+    if ( rule.match( regexp.URLS ) ) {
+        return rule.match( regexp.URLS )[ 0 ]
+            .replace( /^url\s?\(/, '' )
+            .replace( /\)$/, '' )
+            .trim()
+            .replace( /^("|\')/, '' )
+            .replace( /("|\')$/, '' );
+    }
+
+    return '';
+};
+
+/**
+ * Returns original URI.
+ * @returns {String} Original URI.
+ */
+UrlHelper.prototype.getOriginalURI = function () {
+    return this._originalURI;
+};
+
+/**
+ * Returns modified rule.
+ * @returns {String} Modified rule.
+ */
+UrlHelper.prototype.getModifiedRule = function () {
+    var modifiedURI = this.URI.toString();
+    var originalHasIEFix = this._originalURI.match( /\?#iefix/ );
+    var modifiedShouldHaveIEFix = modifiedURI.match( /[^?]#iefix/ );
+
+    // TODO Remove VERY ugly ?#iefix exeption handling, urijs normalizing it and removing "?"
+    if ( originalHasIEFix && modifiedShouldHaveIEFix ) {
+        modifiedURI = modifiedURI.replace( '#iefix', '?#iefix' );
+    }
+
+    if (this._originalRule.match(/url\(\s*\)/) && modifiedURI) {
+        return "url('" + modifiedURI + "')";
+    }
+
+    return this._originalRule.replace( this._originalURI, modifiedURI );
+};
+
+/**
+ * Returns original rule.
+ * @returns {String} Original rule.
+ */
+UrlHelper.prototype.getOriginalRule = function () {
+    return this._originalRule;
+};
+
+module.exports = UrlHelper;