MD History: Delete Grouped History

chrome/browser/resources/md_history/grouped_list.js

-// Copyright 2016 The Chromium Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style license that can be
-// found in the LICENSE file.
-
-/**
- * @typedef {{domain: string,
- *            visits: !Array<HistoryEntry>,
- *            rendered: boolean,
- *            expanded: boolean}}
- */
-var HistoryDomain;
-
-/**
- * @typedef {{title: string,
- *            domains: !Array<HistoryDomain>}}
- */
-var HistoryGroup;
-
-Polymer({
-  is: 'history-grouped-list',
-
-  behaviors: [HistoryListBehavior],
-
-  properties: {
-    searchedTerm: {
-      type: String,
-      value: '',
-    },
-
-    /**
-     * @type {Array<HistoryGroup>}
-     */
-    groupedHistoryData_: Array,
-
-    // An array of history entries in reverse chronological order.
-    historyData: Array,
-
-    queryInterval: String,
-
-    range: Number,
-  },
-
-  observers: ['updateGroupedHistoryData_(historyData)'],
-
-  /**
-   * @param {!Array<!HistoryEntry>} results
-   * @param {boolean} incremental
-   * @param {boolean} finished
-   */
-  addNewResults: function(results, incremental, finished) {
-    this.historyData = results;
-  },
-
-  /**
-   * Make a list of domains from visits.
-   * @param {!Array<!HistoryEntry>} visits
-   * @return {!Array<!HistoryDomain>}
-   */
-  createHistoryDomains_: function(visits) {
-    var domainIndexes = {};
-    var domains = [];
-
-    // Group the visits into a dictionary and generate a list of domains.
-    for (var i = 0, visit; visit = visits[i]; i++) {
-      var domain = visit.domain;
-      if (domainIndexes[domain] == undefined) {
-        domainIndexes[domain] = domains.length;
-        domains.push({
-          domain: domain,
-          visits: [],
-          expanded: false,
-          rendered: false,
-        });
-      }
-      domains[domainIndexes[domain]].visits.push(visit);
-    }
-    var sortByVisits = function(a, b) {
-      return b.visits.length - a.visits.length;
-    };
-    domains.sort(sortByVisits);
-
-    return domains;
-  },
-
-  /** @private */
-  updateGroupedHistoryData_: function() {
-    if (this.historyData.length == 0) {
-      this.groupedHistoryData_ = [];
-      return;
-    }
-
-    if (this.range == HistoryRange.WEEK) {
-      // Group each day into a list of results.
-      var days = [];
-      var currentDayVisits = [this.historyData[0]];
-
-      var pushCurrentDay = function() {
-        days.push({
-          title: this.searchedTerm ? currentDayVisits[0].dateShort :
-                                     currentDayVisits[0].dateRelativeDay,
-          domains: this.createHistoryDomains_(currentDayVisits),
-        });
-      }.bind(this);
-
-      var visitsSameDay = function(a, b) {
-        if (this.searchedTerm)
-          return a.dateShort == b.dateShort;
-
-        return a.dateRelativeDay == b.dateRelativeDay;
-      }.bind(this);
-
-      for (var i = 1; i < this.historyData.length; i++) {
-        var visit = this.historyData[i];
-        if (!visitsSameDay(visit, currentDayVisits[0])) {
-          pushCurrentDay();
-          currentDayVisits = [];
-        }
-        currentDayVisits.push(visit);
-      }
-      pushCurrentDay();
-
-      this.groupedHistoryData_ = days;
-    } else if (this.range == HistoryRange.MONTH) {
-      // Group each all visits into a single list.
-      this.groupedHistoryData_ = [{
-        title: this.queryInterval,
-        domains: this.createHistoryDomains_(this.historyData)
-      }];
-    }
-  },
-
-  /**
-   * @param {{model:Object, currentTarget:IronCollapseElement}} e
-   */
-  toggleDomainExpanded_: function(e) {
-    var collapse = e.currentTarget.parentNode.querySelector('iron-collapse');
-    e.model.set('domain.rendered', true);
-
-    // Give the history-items time to render.
-    setTimeout(function() {
-      collapse.toggle()
-    }, 0);
-  },
-
-  /**
-   * Check whether the time difference between the given history item and the
-   * next one is large enough for a spacer to be required.
-   * @param {number} groupIndex
-   * @param {number} domainIndex
-   * @param {number} itemIndex
-   * @return {boolean} Whether or not time gap separator is required.
-   * @private
-   */
-  needsTimeGap_: function(groupIndex, domainIndex, itemIndex) {
-    var visits =
-        this.groupedHistoryData_[groupIndex].domains[domainIndex].visits;
-
-    return md_history.HistoryItem.needsTimeGap(
-        visits, itemIndex, this.searchedTerm);
-  },
-
-  /**
-   * @param {number} groupIndex
-   * @param {number} domainIndex
-   * @param {number} itemIndex
-   * @return {string}
-   * @private
-   */
-  pathForItem_: function(groupIndex, domainIndex, itemIndex) {
-    return [
-      'groupedHistoryData_', groupIndex, 'domains', domainIndex, 'visits',
-      itemIndex
-    ].join('.');
-  },
-
-  /**
-   * @param {HistoryDomain} domain
-   * @return {string}
-   * @private
-   */
-  getWebsiteIconStyle_: function(domain) {
-    return 'background-image: ' + cr.icon.getFavicon(domain.visits[0].url);
-  },
-
-  /**
-   * @param {boolean} expanded
-   * @return {string}
-   * @private
-   */
-  getDropdownIcon_: function(expanded) {
-    return expanded ? 'cr:expand-less' : 'cr:expand-more';
-  },
-});