gerrit/polygerrit-ui/app/elements/diff/gr-diff-builder/gr-diff-builder.html

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Copyright (C) 2016 The Android Open Source Project

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you may not use this file except in compliance with the License.
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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<link rel="import" href="../../../bower_components/polymer/polymer.html">

<dom-module id="gr-diff-builder">
  <template>
    <div class="contentWrapper">
      <content></content>
    </div>
  </template>
  <script src="../gr-diff/gr-diff-line.js"></script>
  <script src="../gr-diff/gr-diff-group.js"></script>
  <script src="gr-diff-builder.js"></script>
  <script src="gr-diff-builder-side-by-side.js"></script>
  <script src="gr-diff-builder-unified.js"></script>
  <script src="gr-diff-builder-image.js"></script>
  <script>
    (function() {
      'use strict';

      var DiffViewMode = {
        SIDE_BY_SIDE: 'SIDE_BY_SIDE',
        UNIFIED: 'UNIFIED_DIFF',
      };

      Polymer({
        is: 'gr-diff-builder',

        /**
         * Fired when the diff is rendered.
         *
         * @event render
         */

        properties: {
          viewMode: String,
          isImageDiff: Boolean,
          baseImage: Object,
          revisionImage: Object,
          _builder: Object,
        },

        get diffElement() {
          return this.queryEffectiveChildren('#diffTable');
        },

        render: function(diff, comments, prefs) {
          this._builder = this._getDiffBuilder(diff, comments, prefs);
          this._renderDiff();
        },

        getLineElByChild: function(node) {
          while (node) {
            if (node instanceof Element) {
              if (node.classList.contains('lineNum')) {
                return node;
              }
              if (node.classList.contains('section')) {
                return null;
              }
            }
            node = node.previousSibling || node.parentElement;
          };
          return null;
        },

        getSideByLineEl: function(lineEl) {
          return lineEl.classList.contains(GrDiffBuilder.Side.RIGHT) ?
            GrDiffBuilder.Side.RIGHT : GrDiffBuilder.Side.LEFT;
        },

        createCommentThread: function(changeNum, patchNum, path, side,
            projectConfig) {
          return this._builder.createCommentThread(changeNum, patchNum, path,
              side, projectConfig);
        },

        emitGroup: function(group, sectionEl) {
          this._builder.emitGroup(group, sectionEl);
        },

        emitDiff: function() {
          this._builder.emitDiff();
        },

        showContext: function(newGroups, sectionEl) {
          var groups = this._builder._groups;
          // TODO(viktard): Polyfill findIndex for IE10.
          var contextIndex = groups.findIndex(function(group) {
            return group.element == sectionEl;
          });
          groups.splice.apply(groups, [contextIndex, 1].concat(newGroups));

          newGroups.forEach(function(newGroup) {
            this._builder.emitGroup(newGroup, sectionEl);
          }.bind(this));
          sectionEl.parentNode.removeChild(sectionEl);

          this.async(function() {
            this.fire('render');
          }.bind(this), 1);
        },

        _getDiffBuilder: function(diff, comments, prefs) {
          if (this.isImageDiff) {
            return new GrDiffBuilderImage(diff, comments, prefs,
                this.diffElement, this.baseImage, this.revisionImage);
          } else if (this.viewMode === DiffViewMode.SIDE_BY_SIDE) {
            return new GrDiffBuilderSideBySide(
                diff, comments, prefs, this.diffElement);
          } else if (this.viewMode === DiffViewMode.UNIFIED) {
            return new GrDiffBuilderUnified(
                diff, comments, prefs, this.diffElement);
          }
          throw Error('Unsupported diff view mode: ' + this.viewMode);
        },

        _renderDiff: function() {
          this._clearDiffContent();
          this.emitDiff();
          this.async(function() {
            this.fire('render');
          }, 1);
        },

        _clearDiffContent: function() {
          this.diffElement.innerHTML = null;
        },
      });
    })();
  </script>
</dom-module>