| // Copyright (c) 2012 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. |
| |
| /** |
| * Requests the database from the backend. |
| */ |
| function requestResourcePrefetchPredictorDb() { |
| chrome.send('requestResourcePrefetchPredictorDb'); |
| } |
| |
| /** |
| * Callback from backend with the database contents. Sets up some globals and |
| * calls to create the UI. |
| * @param {Dictionary} database Information about ResourcePrefetchPredictor |
| * including the database as a flattened list, a boolean indicating if the |
| * system is enabled. |
| */ |
| function updateResourcePrefetchPredictorDb(database) { |
| updateResourcePrefetchPredictorDbView(database); |
| } |
| |
| /** |
| * Truncates the string to keep the database readable. |
| * @param {string} str The string to truncate. |
| * @return {string} The truncated string. |
| */ |
| function truncateString(str) { |
| return str.length < 100 ? str : str.substring(0, 99); |
| } |
| |
| /** |
| * Updates the table from the database. |
| * @param {Dictionary} database Information about ResourcePrefetchPredictor |
| * including the database as a flattened list, a boolean indicating if the |
| * system is enabled and the current hit weight. |
| */ |
| function updateResourcePrefetchPredictorDbView(database) { |
| if (!database.enabled) { |
| $('rpp_enabled').style.display = 'none'; |
| $('rpp_disabled').style.display = 'block'; |
| return; |
| } else { |
| $('rpp_enabled').style.display = 'block'; |
| $('rpp_disabled').style.display = 'none'; |
| } |
| |
| var hasUrlData = database.url_db && database.url_db.length > 0; |
| var hasHostData = database.host_db && database.host_db.length > 0; |
| |
| if (hasUrlData) |
| renderCacheData($('rpp_url_body'), database.url_db); |
| if (hasHostData) |
| renderCacheData($('rpp_host_body'), database.host_db); |
| } |
| |
| /** |
| * Renders cache data for URL or host based data. |
| * @param {HTMLElement} body element of table to render into. |
| * @param {Dictionary} database to render. |
| */ |
| function renderCacheData(body, database) { |
| body.textContent = ''; |
| for (var i = 0; i < database.length; ++i) { |
| var main = database[i]; |
| |
| for (var j = 0; j < main.resources.length; ++j) { |
| var resource = main.resources[j]; |
| var row = document.createElement('tr'); |
| |
| if (j == 0) { |
| var t = document.createElement('td'); |
| t.rowSpan = main.resources.length; |
| t.textContent = truncateString(main.main_frame_url); |
| t.className = 'last'; |
| row.appendChild(t); |
| } |
| |
| if (j == main.resources.length - 1) |
| row.className = 'last'; |
| |
| row.appendChild(document.createElement('td')).textContent = |
| truncateString(resource.resource_url); |
| row.appendChild(document.createElement('td')).textContent = |
| resource.resource_type; |
| row.appendChild(document.createElement('td')).textContent = |
| resource.number_of_hits; |
| row.appendChild(document.createElement('td')).textContent = |
| resource.number_of_misses; |
| row.appendChild(document.createElement('td')).textContent = |
| resource.consecutive_misses; |
| row.appendChild(document.createElement('td')).textContent = |
| resource.position; |
| row.appendChild(document.createElement('td')).textContent = |
| resource.score; |
| body.appendChild(row); |
| } |
| } |
| } |
| |
| document.addEventListener('DOMContentLoaded', |
| requestResourcePrefetchPredictorDb); |