polygerrit-ui/app/elements/shared/gr-linked-text/gr-linked-text.js

// Copyright (C) 2016 The Android Open Source Project
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
(function() {
  'use strict';

  Polymer({
    is: 'gr-linked-text',

    properties: {
      content: {
        type: String,
        observer: '_contentChanged',
      },
      pre: {
        type: Boolean,
        value: false,
        reflectToAttribute: true,
      },
      disabled: {
        type: Boolean,
        value: false,
        reflectToAttribute: true,
      },
      config: Object,
    },

    observers: [
      '_contentOrConfigChanged(content, config)',
    ],

    _contentChanged: function(content) {
      // In the case where the config may not be set (perhaps due to the
      // request for it still being in flight), set the content anyway to
      // prevent waiting on the config to display the text.
      if (this.config != null) { return; }
      this.$.output.textContent = content;
    },

    _contentOrConfigChanged: function(content, config) {
      var output = Polymer.dom(this.$.output);
      output.textContent = '';
      var parser = new GrLinkTextParser(config, function(text, href, html) {
        if (href) {
          var a = document.createElement('a');
          a.href = href;
          a.textContent = text;
          a.target = '_blank';
          output.appendChild(a);
        } else if (html) {
          var fragment = document.createDocumentFragment();
          // Create temporary div to hold the nodes in.
          var div = document.createElement('div');
          div.innerHTML = html;
          while (div.firstChild) {
            fragment.appendChild(div.firstChild);
          }
          output.appendChild(fragment);
        } else {
          output.appendChild(document.createTextNode(text));
        }
      });
      parser.parse(content);
    }
  });
})();