Added base template for config ui.

appengine/config_service/ui/bower_components/shadycss/src/css-parse.js

+/**
+@license
+Copyright (c) 2017 The Polymer Project Authors. All rights reserved.
+This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
+The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
+The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
+Code distributed by Google as part of the polymer project is also
+subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
+*/
+
+/*
+Extremely simple css parser. Intended to be not more than what we need
+and definitely not necessarily correct =).
+*/
+
+'use strict';
+
+/** @unrestricted */
+class StyleNode {
+  constructor() {
+    /** @type {number} */
+    this['start'] = 0;
+    /** @type {number} */
+    this['end'] = 0;
+    /** @type {StyleNode} */
+    this['previous'] = null;
+    /** @type {StyleNode} */
+    this['parent'] = null;
+    /** @type {Array<StyleNode>} */
+    this['rules'] = null;
+    /** @type {string} */
+    this['parsedCssText'] = '';
+    /** @type {string} */
+    this['cssText'] = '';
+    /** @type {boolean} */
+    this['atRule'] = false;
+    /** @type {number} */
+    this['type'] = 0;
+    /** @type {string} */
+    this['keyframesName'] = '';
+    /** @type {string} */
+    this['selector'] = '';
+    /** @type {string} */
+    this['parsedSelector'] = '';
+  }
+}
+
+export {StyleNode}
+
+// given a string of css, return a simple rule tree
+/**
+ * @param {string} text
+ * @return {StyleNode}
+ */
+export function parse(text) {
+  text = clean(text);
+  return parseCss(lex(text), text);
+}
+
+// remove stuff we don't care about that may hinder parsing
+/**
+ * @param {string} cssText
+ * @return {string}
+ */
+function clean(cssText) {
+  return cssText.replace(RX.comments, '').replace(RX.port, '');
+}
+
+// super simple {...} lexer that returns a node tree
+/**
+ * @param {string} text
+ * @return {StyleNode}
+ */
+function lex(text) {
+  let root = new StyleNode();
+  root['start'] = 0;
+  root['end'] = text.length
+  let n = root;
+  for (let i = 0, l = text.length; i < l; i++) {
+    if (text[i] === OPEN_BRACE) {
+      if (!n['rules']) {
+        n['rules'] = [];
+      }
+      let p = n;
+      let previous = p['rules'][p['rules'].length - 1] || null;
+      n = new StyleNode();
+      n['start'] = i + 1;
+      n['parent'] = p;
+      n['previous'] = previous;
+      p['rules'].push(n);
+    } else if (text[i] === CLOSE_BRACE) {
+      n['end'] = i + 1;
+      n = n['parent'] || root;
+    }
+  }
+  return root;
+}
+
+// add selectors/cssText to node tree
+/**
+ * @param {StyleNode} node
+ * @param {string} text
+ * @return {StyleNode}
+ */
+function parseCss(node, text) {
+  let t = text.substring(node['start'], node['end'] - 1);
+  node['parsedCssText'] = node['cssText'] = t.trim();
+  if (node['parent']) {
+    let ss = node['previous'] ? node['previous']['end'] : node['parent']['start'];
+    t = text.substring(ss, node['start'] - 1);
+    t = _expandUnicodeEscapes(t);
+    t = t.replace(RX.multipleSpaces, ' ');
+    // TODO(sorvell): ad hoc; make selector include only after last ;
+    // helps with mixin syntax
+    t = t.substring(t.lastIndexOf(';') + 1);
+    let s = node['parsedSelector'] = node['selector'] = t.trim();
+    node['atRule'] = (s.indexOf(AT_START) === 0);
+    // note, support a subset of rule types...
+    if (node['atRule']) {
+      if (s.indexOf(MEDIA_START) === 0) {
+        node['type'] = types.MEDIA_RULE;
+      } else if (s.match(RX.keyframesRule)) {
+        node['type'] = types.KEYFRAMES_RULE;
+        node['keyframesName'] =
+          node['selector'].split(RX.multipleSpaces).pop();
+      }
+    } else {
+      if (s.indexOf(VAR_START) === 0) {
+        node['type'] = types.MIXIN_RULE;
+      } else {
+        node['type'] = types.STYLE_RULE;
+      }
+    }
+  }
+  let r$ = node['rules'];
+  if (r$) {
+    for (let i = 0, l = r$.length, r;
+      (i < l) && (r = r$[i]); i++) {
+      parseCss(r, text);
+    }
+  }
+  return node;
+}
+
+/**
+ * conversion of sort unicode escapes with spaces like `\33 ` (and longer) into
+ * expanded form that doesn't require trailing space `\000033`
+ * @param {string} s
+ * @return {string}
+ */
+function _expandUnicodeEscapes(s) {
+  return s.replace(/\\([0-9a-f]{1,6})\s/gi, function() {
+    let code = arguments[1],
+      repeat = 6 - code.length;
+    while (repeat--) {
+      code = '0' + code;
+    }
+    return '\\' + code;
+  });
+}
+
+/**
+ * stringify parsed css.
+ * @param {StyleNode} node
+ * @param {boolean=} preserveProperties
+ * @param {string=} text
+ * @return {string}
+ */
+export function stringify(node, preserveProperties, text = '') {
+  // calc rule cssText
+  let cssText = '';
+  if (node['cssText'] || node['rules']) {
+    let r$ = node['rules'];
+    if (r$ && !_hasMixinRules(r$)) {
+      for (let i = 0, l = r$.length, r;
+        (i < l) && (r = r$[i]); i++) {
+        cssText = stringify(r, preserveProperties, cssText);
+      }
+    } else {
+      cssText = preserveProperties ? node['cssText'] :
+        removeCustomProps(node['cssText']);
+      cssText = cssText.trim();
+      if (cssText) {
+        cssText = '  ' + cssText + '\n';
+      }
+    }
+  }
+  // emit rule if there is cssText
+  if (cssText) {
+    if (node['selector']) {
+      text += node['selector'] + ' ' + OPEN_BRACE + '\n';
+    }
+    text += cssText;
+    if (node['selector']) {
+      text += CLOSE_BRACE + '\n\n';
+    }
+  }
+  return text;
+}
+
+/**
+ * @param {Array<StyleNode>} rules
+ * @return {boolean}
+ */
+function _hasMixinRules(rules) {
+  let r = rules[0];
+  return Boolean(r) && Boolean(r['selector']) && r['selector'].indexOf(VAR_START) === 0;
+}
+
+/**
+ * @param {string} cssText
+ * @return {string}
+ */
+function removeCustomProps(cssText) {
+  cssText = removeCustomPropAssignment(cssText);
+  return removeCustomPropApply(cssText);
+}
+
+/**
+ * @param {string} cssText
+ * @return {string}
+ */
+export function removeCustomPropAssignment(cssText) {
+  return cssText
+    .replace(RX.customProp, '')
+    .replace(RX.mixinProp, '');
+}
+
+/**
+ * @param {string} cssText
+ * @return {string}
+ */
+function removeCustomPropApply(cssText) {
+  return cssText
+    .replace(RX.mixinApply, '')
+    .replace(RX.varApply, '');
+}
+
+/** @enum {number} */
+export const types = {
+  STYLE_RULE: 1,
+  KEYFRAMES_RULE: 7,
+  MEDIA_RULE: 4,
+  MIXIN_RULE: 1000
+}
+
+const OPEN_BRACE = '{';
+const CLOSE_BRACE = '}';
+
+// helper regexp's
+const RX = {
+  comments: /\/\*[^*]*\*+([^/*][^*]*\*+)*\//gim,
+  port: /@import[^;]*;/gim,
+  customProp: /(?:^[^;\-\s}]+)?--[^;{}]*?:[^{};]*?(?:[;\n]|$)/gim,
+  mixinProp: /(?:^[^;\-\s}]+)?--[^;{}]*?:[^{};]*?{[^}]*?}(?:[;\n]|$)?/gim,
+  mixinApply: /@apply\s*\(?[^);]*\)?\s*(?:[;\n]|$)?/gim,
+  varApply: /[^;:]*?:[^;]*?var\([^;]*\)(?:[;\n]|$)?/gim,
+  keyframesRule: /^@[^\s]*keyframes/,
+  multipleSpaces: /\s+/g
+}
+
+const VAR_START = '--';
+const MEDIA_START = '@media';
+const AT_START = '@';