clear

node_modules/clean-css/lib/text/escape-store.js

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+var placeholderBrace = '__';
+
+function EscapeStore(placeholderRoot) {
+  this.placeholderRoot = 'ESCAPED_' + placeholderRoot + '_CLEAN_CSS';
+  this.placeholderToData = {};
+  this.dataToPlaceholder = {};
+  this.count = 0;
+  this.restoreMatcher = new RegExp(this.placeholderRoot + '(\\d+)');
+}
+
+EscapeStore.prototype._nextPlaceholder = function (metadata) {
+  return {
+    index: this.count,
+    value: placeholderBrace + this.placeholderRoot + this.count++ + metadata + placeholderBrace
+  };
+};
+
+EscapeStore.prototype.store = function (data, metadata) {
+  var encodedMetadata = metadata ?
+    '(' + metadata.join(',') + ')' :
+    '';
+  var placeholder = this.dataToPlaceholder[data];
+
+  if (!placeholder) {
+    var nextPlaceholder = this._nextPlaceholder(encodedMetadata);
+    placeholder = nextPlaceholder.value;
+    this.placeholderToData[nextPlaceholder.index] = data;
+    this.dataToPlaceholder[data] = nextPlaceholder.value;
+  }
+
+  if (metadata)
+    placeholder = placeholder.replace(/\([^\)]+\)/, encodedMetadata);
+
+  return placeholder;
+};
+
+EscapeStore.prototype.nextMatch = function (data, cursor) {
+  var next = {};
+
+  next.start = data.indexOf(this.placeholderRoot, cursor) - placeholderBrace.length;
+  next.end = data.indexOf(placeholderBrace, next.start + placeholderBrace.length) + placeholderBrace.length;
+  if (next.start > -1 && next.end > -1)
+    next.match = data.substring(next.start, next.end);
+
+  return next;
+};
+
+EscapeStore.prototype.restore = function (placeholder) {
+  var index = this.restoreMatcher.exec(placeholder)[1];
+  return this.placeholderToData[index];
+};
+
+module.exports = EscapeStore;