polygerrit-ui/app/elements/gr-change-list.html

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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.
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<link rel="import" href="../bower_components/polymer/polymer.html">
<link rel="import" href="../bower_components/iron-a11y-keys-behavior/iron-a11y-keys-behavior.html">
<link rel="import" href="../styles/gr-change-list-styles.html">
<link rel="import" href="gr-change-list-item.html">

<dom-module id="gr-change-list">
  <template>
    <style>
      :host {
        display: flex;
        flex-direction: column;
      }
      .headerRow {
        display: flex;
      }
      .topHeader,
      .groupHeader {
        border-bottom: 1px solid #eee;
        font-weight: bold;
        padding: .3em .5em;
      }
      .topHeader {
        background-color: #ddd;
        flex-shrink: 0;
      }
    </style>
    <style include="gr-change-list-styles"></style>
    <div class="headerRow">
      <span class="topHeader keyboard"></span> <!-- keyboard position indicator -->
      <span class="topHeader subject">Subject</span>
      <span class="topHeader status">Status</span>
      <span class="topHeader owner">Owner</span>
      <span class="topHeader project">Project</span>
      <span class="topHeader branch">Branch</span>
      <span class="topHeader updated">Updated</span>
      <span class="topHeader size">Size</span>
      <span class="topHeader codeReview" title="Code-Review">CR</span>
      <span class="topHeader verified" title="Verified">V</span>
    </div>
    <template is="dom-repeat" items="{{groups}}" as="changeGroup" index-as="groupIndex">
      <template is="dom-if" if="[[_groupTitle(groupIndex)]]">
        <div class="groupHeader">[[_groupTitle(groupIndex)]]</div>
      </template>
      <template is="dom-repeat" items="[[changeGroup]]" as="change">
        <gr-change-list-item change="[[change]]"
            selected="[[_isSelected(groupIndex, index)]]"></gr-change-list-item>
      </template>
    </template>
  </template>

  <script>
  (function() {
    'use strict';

    Polymer({
      is: 'gr-change-list',

      behaviors: [
        Polymer.IronA11yKeysBehavior
      ],

      hostAttributes: {
        tabindex: 0,
      },

      properties: {
        /**
         * An array of ChangeInfo objects to render.
         * https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#change-info
         */
        changes: {
          type: Array,
          observer: '_changesChanged',
        },
        /**
         * ChangeInfo objects grouped into arrays. The groups and changes
         * properties should not be used together.
         */
        groups: {
          type: Array,
          value: function() { return []; },
          observer: '_groupsChanged',
        },
        keyEventTarget: {
          type: Object,
          value: function() {
            return document.body;
          }
        },
        groupTitles: {
          type: Array,
          value: function() { return []; },
        },
        selectedIndex: {
          type: Number,
          value: 0,
          observer: '_selectedIndexChanged',
        },
      },

      keyBindings: {
        'j k o enter': '_handleKey',
      },

      _isSelected: function(groupIndex, index) {
        return index == this.selectedIndex;
      },

      _changesChanged: function(changes) {
        this.groups = [changes];
      },

      _groupsChanged: function(groups) {
        for (var i = 0; i < groups.length; i++) {
          for (var j = 0; j < groups[i].length; j++) {
            var change = groups[i][j];
            if (change.labels && change.labels.hasOwnProperty('Code-Review')) {
              // Transform Code-Review to Code_Review so it is a JS identifier
              // that can be used in computed properties. This is a hack, but
              // it'll all have to change to support dynamic label sets anyway.
              change.labels['Code_Review'] = change.labels['Code-Review'];
              delete change.labels['Code-Review'];
            }
          }
        }
      },

      _groupTitle: function(groupIndex) {
        if (groupIndex > this.groupTitles.length - 1) { return null; }
        return this.groupTitles[groupIndex];
      },

      _selectedIndexChanged: function(value) {
        // Don't re-render the entire list.
        var changeEls = this._getListItems();
        for (var i = 0; i < changeEls.length; i++) {
          changeEls[i].toggleAttribute('selected', i == value);
        }
      },

      _handleKey: function(e) {
        if (util.shouldSupressKeyboardShortcut(e)) { return; }

        if (this.groups == null) { return; }
        var len = 0;
        this.groups.forEach(function(group) {
          len += group.length;
        });
        switch(e.detail.combo) {
          case 'j':
            if (this.selectedIndex == len - 1) { return; }
            this.selectedIndex += 1;
            break;
          case 'k':
            if (this.selectedIndex == 0) { return; }
            this.selectedIndex -= 1;
            break;
          case 'o':
          case 'enter':
            page.show(this._changeURLForIndex(this.selectedIndex));
            break;
        }
      },

      _changeURLForIndex: function(index) {
        var changeEls = this._getListItems();
        if (index < changeEls.length && changeEls[index]) {
          return changeEls[index].changeURL;
        }
        return '';
      },

      _getListItems: function() {
        return Polymer.dom(this.root).querySelectorAll('gr-change-list-item');
      },

    });
  })();
  </script>
</dom-module>