gerrit/polygerrit-ui/app/elements/gr-change-list-view.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.
You may obtain a copy of the License at

http://www.apache.org/licenses/LICENSE-2.0

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<link rel="import" href="../bower_components/polymer/polymer.html">
<link rel="import" href="gr-ajax.html">
<link rel="import" href="gr-change-list.html">

<dom-module id="gr-change-list-view">
  <template>
    <style>
      :host {
        background-color: var(--view-background-color);
        display: block;
        margin: 0 1.25rem;
      }
      gr-change-list {
        margin-top: 1em;
        width: 100%;
      }
      nav {
        margin-bottom: 1em;
        padding: .5em 0;
        text-align: center;
      }
      nav a {
        display: inline-block;
      }
      nav a:first-of-type {
        margin-right: .5em;
      }
      [hidden] {
        display: none !important;
      }
    </style>
    <gr-ajax
        auto
        url="/changes/"
        params="[[_computeQueryParams(query, offset)]]"
        last-response="{{_changes}}"></gr-ajax>
    <gr-change-list changes="{{_changes}}"></gr-change-list>
    <nav>
      <a href$="[[_computeNavLink(query, offset, -1)]]"
         hidden$="[[_hidePrevArrow(offset)]]">&larr; Prev</a>
      <a href$="[[_computeNavLink(query, offset, 1)]]"
         hidden$="[[_hideNextArrow(_changes.length)]]">Next &rarr;</a>
    </nav>
  </template>
  <script>
  (function() {
    'use strict';

    var DEFAULT_NUM_CHANGES = 25;

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

      properties: {
        /**
         * URL params passed from the router.
         */
        params: {
          type: Object,
          observer: '_paramsChanged',
        },

        /**
         * Change objects loaded from the server.
         */
        _changes: Array,
      },

      _paramsChanged: function(value) {
        this.query = value.query;
        this.offset = value.offset || 0;
      },

      _computeQueryParams: function(query, offset) {
        var options = Changes.listChangesOptionsToHex(
            Changes.ListChangesOption.LABELS,
            Changes.ListChangesOption.DETAILED_ACCOUNTS
        );
        var obj = {
          n: DEFAULT_NUM_CHANGES,  // Number of results to return.
          O: options,
          S: offset || 0,
        };
        if (query && query.length > 0) {
          obj.q = query;
        }
        return obj;
      },

      _computeNavLink: function(query, offset, direction) {
        // Offset could be a string when passed from the router.
        offset = +(offset || 0);
        var newOffset = Math.max(0, offset + (25 * direction));
        var href = '/q/' + query;
        if (newOffset > 0) {
          href += ',' + newOffset;
        }
        return href;
      },

      _hidePrevArrow: function(offset) {
        return offset == 0;
      },

      _hideNextArrow: function(changesLen) {
        return changesLen < DEFAULT_NUM_CHANGES;
      },

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