gerrit/polygerrit-ui/app/elements/gr-change-view.html

<!--
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">
<link rel="import" href="../bower_components/iron-a11y-keys-behavior/iron-a11y-keys-behavior.html">
<link rel="import" href="gr-ajax.html">
<link rel="import" href="gr-date-formatter.html">
<link rel="import" href="gr-file-list.html">
<link rel="import" href="gr-linked-text.html">
<link rel="import" href="gr-messages-list.html">
<link rel="import" href="gr-reply-dropdown.html">

<dom-module id="gr-change-view">
  <template>
    <style>
      .container {
        margin: 1em 0;
      }
      .container:not(.loading) {
        background-color: var(--view-background-color);
      }
      .container.loading {
        color: #666;
      }
      .headerContainer {
        height: 4.1em;
      }
      .header {
        align-items: center;
        background-color: var(--view-background-color);
        display: flex;
        max-width: var(--max-constrained-width);
        padding: 1em var(--default-horizontal-margin);
        white-space: nowrap;
        width: 100%;
        z-index: 1000;
      }
      .header.pinned {
        box-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
        position: fixed;
        top: 0;
        transition: box-shadow 250ms linear;
      }
      .header h2 {
        flex: 1;
        overflow: hidden;
        text-overflow: ellipsis;
      }
      .patchSelectLabel {
        margin-left: var(--default-horizontal-margin);
      }
      .header select {
        margin-left: .5em;
      }
      .header gr-reply-dropdown {
        margin-left: var(--default-horizontal-margin);
      }
      section {
        margin: 10px 0;
        padding: 10px var(--default-horizontal-margin);
      }
      section:first-of-type {
        margin-top: 0;
      }
      table {
        border-collapse: collapse;
      }
      td {
        padding: 2px 5px;
        vertical-align: top;
      }
      .changeInfo-label {
        font-weight: bold;
        text-align: right;
      }
      .summary {
        border-top: 1px solid #ddd;
        border-bottom: 1px solid #ddd;
        font-family: 'Source Code Pro', Menlo, 'Lucida Console', Monaco, monospace;
        overflow-x: auto;
      }
      gr-file-list {
        padding: 0 var(--default-horizontal-margin) 10px;
      }
    </style>
    <gr-ajax id="detailXHR"
        url="[[_computeDetailPath(_changeNum)]]"
        params="[[_computeDetailQueryParams()]]"
        last-response="{{_change}}"
        loading="{{_loading}}"></gr-ajax>
    <gr-ajax id="commentsXHR"
        url="[[_computeCommentsPath(_changeNum)]]"
        last-response="{{_comments}}"></gr-ajax>
    <gr-ajax id="commitInfoXHR"
        url="[[_computeCommitInfoPath(_changeNum, _patchNum)]]"
        last-response="{{_commitInfo}}"></gr-ajax>
    <div class="container loading" hidden$="{{!_loading}}">Loading...</div>
    <div class="container" hidden$="{{_loading}}">
      <div class="headerContainer">
        <div class="header">
          <h2>
            <a href$="[[_computeChangePath(_change._number)]]">[[_change._number]]</a><span>:</span>
            <span>[[_change.subject]]</span>
          </h2>
          <label class="patchSelectLabel" for="patchSetSelect">Patch set</label>
          <select id="patchSetSelect" on-change="_handlePatchChange">
            <template is="dom-repeat" items="{{_allPatchSets}}" as="patchNumber">
              <option value$="[[patchNumber]]" selected$="[[_computePatchIndexIsSelected(index, _patchNum)]]">
                <span>[[patchNumber]]</span>
                /
                <span>[[_computeLatestPatchNum(_change)]]</span>
              </option>
            </template>
          </select>
          <gr-reply-dropdown id="replyDropdown"
              change-num="[[_changeNum]]"
              patch-num="[[_patchNum]]"
              labels="[[_change.labels]]"
              permitted-labels="[[_change.permitted_labels]]"
              on-send="_handleReplySent"
              hidden$="[[!_loggedIn]]">Reply</gr-reply-dropdown>
        </div>
      </div>
      <section class="changeInfo">
        <table>
          <tr>
            <td class="changeInfo-label">Owner</td>
            <td>[[_change.owner.name]]</td>
          </tr>
          <tr>
            <td class="changeInfo-label">Reviewers</td>
            <td>
              <template is="dom-repeat"
                        items="[[_computeReviewers(_change.labels, _change.owner)]]"
                        as="reviewer">
                <div>[[reviewer.name]]</div>
              </template>
            </td>
          </tr>
          <tr>
            <td class="changeInfo-label">Project</td>
            <td>[[_change.project]]</td>
          </tr>
          <tr>
            <td class="changeInfo-label">Branch</td>
            <td>[[_change.branch]]</td>
          </tr>
          <tr>
            <td class="changeInfo-label">Topic</td>
            <td>[[_change.topic]]</td>
          </tr>
          <tr>
            <td class="changeInfo-label">Strategy</td>
            <td></td>
          </tr>
          <tr>
            <td class="changeInfo-label">Updated</td>
            <td>
              <gr-date-formatter
                  date-str="[[_change.updated]]"></gr-date-formatter>
            </td>
          </tr>
        </table>
      </section>
      <section class="summary">
        <gr-linked-text pre content="[[_commitInfo.message]]"></gr-linked-text>
      </section>
      <gr-file-list id="fileList"
          change-num="[[_changeNum]]"
          patch-num="[[_patchNum]]"
          comments="[[_comments]]"></gr-file-list>
      <gr-messages-list
          change-num="[[_changeNum]]"
          messages="[[_change.messages]]"
          comments="[[_comments]]"></gr-messages-list>
    </div>
  </template>
  <script>
  (function() {
    'use strict';

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

      behaviors: [
        Polymer.IronA11yKeysBehavior
      ],

      properties: {
        keyEventTarget: {
          type: Object,
          value: function() {
            return document.body;
          },
        },
        /**
         * URL params passed from the router.
         */
        params: {
          type: Object,
          observer: '_paramsChanged',
        },

        _comments: Object,
        _change: {
          type: Object,
          observer: '_changeChanged',
        },
        _commitInfo: Object,
        _changeNum: String,
        _patchNum: String,
        _allPatchSets: {
          type: Array,
          computed: '_computeAllPatchSets(_change)',
        },
        _loggedIn: {
          type: Boolean,
          value: false,
        },
        _loading: Boolean,
        _headerContainerEl: Object,
        _headerEl: Object,
        _scrollHandler: Function,
      },

      keyBindings: {
        'a u': '_handleKey',
      },

      ready: function() {
        app.accountReady.then(function() {
          this._loggedIn = app.loggedIn;
        }.bind(this));
        this._scrollHandler = this._handleBodyScroll.bind(this);
      },

      attached: function() {
        window.addEventListener('scroll', this._scrollHandler);
      },

      detached: function() {
        window.removeEventListener('scroll', this._scrollHandler);
      },

      _handleBodyScroll: function(e) {
        var containerEl = this._headerContainerEl ||
            this.$$('.headerContainer');

        // Calculate where the header is relative to the window.
        var top = containerEl.offsetTop;
        for (var offsetParent = containerEl.offsetParent;
             offsetParent;
             offsetParent = offsetParent.offsetParent) {
          top += offsetParent.offsetTop;
        }
        // The element may not be displayed yet, in which case do nothing.
        if (top == 0) { return; }

        var el = this._headerEl || this.$$('.header');
        this._headerEl = el;
        el.classList.toggle('pinned', window.scrollY >= top);
      },

      _handlePatchChange: function(e) {
        var patchNum = e.target.value;
        var currentPatchNum =
            this._change.revisions[this._change.current_revision]._number
        if (patchNum == currentPatchNum) {
          page.show(this._computeChangePath(this._changeNum));
          return;
        }
        page.show(this._computeChangePath(this._changeNum) + '/' + patchNum);
      },

      _handleReplySent: function(e) {
        this._reload();
      },

      _paramsChanged: function(value) {
        this._changeNum = value.changeNum;
        this._patchNum = value.patchNum;
        if (!this._changeNum) {
          return;
        }
        this._reload();
      },

      _changeChanged: function(change) {
        if (!change) { return; }
        this._patchNum = this._patchNum ||
            change.revisions[change.current_revision]._number;
      },

      _computeChangePath: function(changeNum) {
        return '/c/' + changeNum;
      },

      _computeDetailPath: function(changeNum) {
        return '/changes/' + changeNum + '/detail';
      },

      _computeCommitInfoPath: function(changeNum, patchNum) {
        return Changes.baseURL(changeNum, patchNum) + '/commit?links';
      },

      _computeCommentsPath: function(changeNum) {
        return '/changes/' + changeNum + '/comments';
      },

      _computeDetailQueryParams: function() {
        var options = Changes.listChangesOptionsToHex(
            Changes.ListChangesOption.ALL_REVISIONS,
            Changes.ListChangesOption.CHANGE_ACTIONS
        );
        return { O: options };
      },

      _computeReviewers: function(labels, owner) {
        var reviewers =
            (labels['Code-Review'] && labels['Code-Review'].all) || [];
        if (reviewers.length == 1) { return reviewers; }
        return reviewers.filter(function(reviewer) {
          return reviewer._account_id != owner._account_id;
        });
      },

      _computeLatestPatchNum: function(change) {
        return change.revisions[change.current_revision]._number;
      },

      _computeAllPatchSets: function(change) {
        var patchNums = [];
        for (var rev in change.revisions) {
          patchNums.push(change.revisions[rev]._number);
        }
        return patchNums.sort();
      },

      _computePatchIndexIsSelected: function(index, patchNum) {
         return this._allPatchSets[index] == patchNum;
      },

      _handleKey: function(e) {
        if (util.shouldSupressKeyboardShortcut(e)) { return; }
        e.preventDefault();
        switch(e.detail.combo) {
          case 'a':
            this.$.replyDropdown.open();
            break;
          case 'u':
            page.show('/');
            break;
        }
      },

      _reload: function() {
        var detailCompletes = this.$.detailXHR.generateRequest().completes;
        this.$.commentsXHR.generateRequest();
        var reloadCommitInfoAndFileList = function() {
          this.$.commitInfoXHR.generateRequest();
          this.$.fileList.reload();
        }.bind(this);

        if (this._patchNum) {
          reloadCommitInfoAndFileList();
        } else {
          // The patch number is reliant on the change detail request.
          detailCompletes.then(reloadCommitInfoAndFileList);
        }
      },

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