1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
6 * Requests the database from the backend.
8 function requestResourcePrefetchPredictorDb() {
9 chrome.send('requestResourcePrefetchPredictorDb');
13 * Callback from backend with the database contents. Sets up some globals and
14 * calls to create the UI.
15 * @param {Dictionary} database Information about ResourcePrefetchPredictor
16 * including the database as a flattened list, a boolean indicating if the
19 function updateResourcePrefetchPredictorDb(database) {
20 updateResourcePrefetchPredictorDbView(database);
24 * Truncates the string to keep the database readable.
25 * @param {string} str The string to truncate.
26 * @return {string} The truncated string.
28 function truncateString(str) {
29 return str.length < 100 ? str : str.substring(0, 99);
33 * Updates the table from the database.
34 * @param {Dictionary} database Information about ResourcePrefetchPredictor
35 * including the database as a flattened list, a boolean indicating if the
36 * system is enabled and the current hit weight.
38 function updateResourcePrefetchPredictorDbView(database) {
39 if (!database.enabled) {
40 $('rpp_enabled').style.display = 'none';
41 $('rpp_disabled').style.display = 'block';
44 $('rpp_enabled').style.display = 'block';
45 $('rpp_disabled').style.display = 'none';
48 var hasUrlData = database.url_db && database.url_db.length > 0;
49 var hasHostData = database.host_db && database.host_db.length > 0;
52 renderCacheData($('rpp_url_body'), database.url_db);
54 renderCacheData($('rpp_host_body'), database.host_db);
58 * Renders cache data for URL or host based data.
59 * @param {HTMLElement} body element of table to render into.
60 * @param {Dictionary} database to render.
62 function renderCacheData(body, database) {
63 body.textContent = '';
64 for (var i = 0; i < database.length; ++i) {
65 var main = database[i];
67 for (var j = 0; j < main.resources.length; ++j) {
68 var resource = main.resources[j];
69 var row = document.createElement('tr');
72 var t = document.createElement('td');
73 t.rowSpan = main.resources.length;
74 t.textContent = truncateString(main.main_frame_url);
79 if (j == main.resources.length - 1)
80 row.className = 'last';
82 row.appendChild(document.createElement('td')).textContent =
83 truncateString(resource.resource_url);
84 row.appendChild(document.createElement('td')).textContent =
85 resource.resource_type;
86 row.appendChild(document.createElement('td')).textContent =
87 resource.number_of_hits;
88 row.appendChild(document.createElement('td')).textContent =
89 resource.number_of_misses;
90 row.appendChild(document.createElement('td')).textContent =
91 resource.consecutive_misses;
92 row.appendChild(document.createElement('td')).textContent =
94 row.appendChild(document.createElement('td')).textContent =
96 body.appendChild(row);
101 document.addEventListener('DOMContentLoaded',
102 requestResourcePrefetchPredictorDb);