<!--
Copyright (C) 2015 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.
-->

<link rel="import" href="../bower_components/polymer/polymer.html">
<script src="../scripts/ba-linkify.js"></script>
<script src="../scripts/link-text-parser.js"></script>
<dom-module id="gr-linked-text">
  <template>
    <style>
      :host {
        display: block;
      }
      :host([pre]) span {
        white-space: pre-wrap;
        word-wrap: break-word;
      }
      :host([disabled]) a {
        color: inherit;
        text-decoration: none;
        pointer-events: none;
      }
    </style>
    <span id="output"></span>
  </template>
  <script>
    '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);
      }
    });
  </script>
</dom-module>