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// Copyright 2014 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.
/**
* @fileoverview Uses ChromeVox API to access the search tools menu.
*/
goog.provide('cvox.SearchTool');
goog.require('cvox.ChromeVox');
goog.require('cvox.DomUtil');
goog.require('cvox.Search');
goog.require('cvox.SearchConstants');
goog.require('cvox.SearchUtil');
/**
* @constructor
*/
cvox.SearchTool = function() {
};
/**
* Index of the current menu in focus.
* @type {number}
*/
cvox.SearchTool.menuIndex;
/**
* Array of menus.
* @type {Array<Node>}
*/
cvox.SearchTool.menus = [];
/**
* Index of the current menu item in focus.
* @type {number}
*/
cvox.SearchTool.menuItemIndex;
/**
* Array of menu items for the current menu.
* @type {Array<Node>}
*/
cvox.SearchTool.menuItems = [];
/**
* Id of the clear button.
* @type {string}
*/
cvox.SearchTool.CLEAR_ID = 'hdtb_rst';
/**
* Toggles a menu open / close by simulating a click.
*/
cvox.SearchTool.toggleMenu = function() {
var menu = cvox.SearchTool.menus[cvox.SearchTool.menuIndex];
var menuDiv = menu.previousSibling;
cvox.DomUtil.clickElem(menuDiv, false, false, false);
};
/**
* Syncs the first item in the current menu to ChromeVox.
*/
cvox.SearchTool.syncToMenu = function() {
cvox.SearchTool.menuItemIndex = 0;
cvox.SearchTool.toggleMenu();
cvox.SearchTool.populateMenuItems();
cvox.SearchTool.syncToMenuItem();
};
/**
* Syncs the current menu item to ChromeVox.
*/
cvox.SearchTool.syncToMenuItem = function() {
var menuItem = cvox.SearchTool.menuItems[cvox.SearchTool.menuItemIndex];
cvox.ChromeVox.syncToNode(menuItem, true);
};
/**
* Fills in menuItems with the current menu's items.
*/
cvox.SearchTool.populateMenuItems = function() {
var menu = cvox.SearchTool.menus[cvox.SearchTool.menuIndex];
cvox.SearchTool.menuItems = [];
/* For now, we just special case on the clear button. */
if (menu.id !== cvox.SearchTool.CLEAR_ID) {
var MENU_ITEM_SELECTOR = '.hdtbItm';
var menuItemNodeList = menu.querySelectorAll(MENU_ITEM_SELECTOR);
for (var i = 0; i < menuItemNodeList.length; i++) {
cvox.SearchTool.menuItems.push(menuItemNodeList.item(i));
}
} else {
cvox.SearchTool.menuItems = [];
cvox.SearchTool.menuItems.push(menu);
}
};
/**
* Fills in menus with the menus of the page.
*/
cvox.SearchTool.populateMenus = function() {
var MENU_SELECTOR = '.hdtbU';
var menuDivs = document.querySelectorAll(MENU_SELECTOR);
for (var i = 0; i < menuDivs.length; i++) {
cvox.SearchTool.menus.push(menuDivs.item(i));
}
var clearDiv = document.getElementById(cvox.SearchTool.CLEAR_ID);
if (clearDiv) {
cvox.SearchTool.menus.push(clearDiv);
}
};
/**
* Switches focus to the tools interface, giving keyboard access.
*/
cvox.SearchTool.activateTools = function() {
var MENU_BAR_SELECTOR = '#hdtbMenus';
var menuBar = document.querySelector(MENU_BAR_SELECTOR);
var MENUS_OPEN_CLASS = 'hdtb-td-o';
menuBar.className = MENUS_OPEN_CLASS;
cvox.SearchTool.populateMenus();
cvox.SearchTool.menuIndex = 0;
cvox.SearchTool.syncToMenu();
};
/**
* Goes to the link of the current menu item action.
*/
cvox.SearchTool.gotoMenuItem = function() {
var menuItem = cvox.SearchTool.menuItems[cvox.SearchTool.menuItemIndex];
var LOCATION_INPUT_ID = '#lc-input';
var input = menuItem.querySelector(LOCATION_INPUT_ID);
/* Special case for setting location. */
if (input) {
input.focus();
return;
}
/* Custom Date Range. */
var CDR_ID = 'cdr_opt';
switch (menuItem.id) {
case cvox.SearchTool.CLEAR_ID:
window.location = menuItem.dataset.url;
break;
case CDR_ID:
var CDR_LINK_SELECTOR = '#cdrlnk';
var cdrLink = menuItem.querySelector(CDR_LINK_SELECTOR);
cvox.DomUtil.clickElem(cdrLink, false, false, false);
cvox.SearchTool.toggleMenu();
break;
default:
window.location = cvox.SearchUtil.extractURL(menuItem);
break;
}
};
/**
* Handles key events for the tools interface.
* @param {Event} evt Keydown event.
* @return {boolean} True if key was handled, false otherwise.
*/
cvox.SearchTool.keyhandler = function(evt) {
if (cvox.SearchUtil.isSearchWidgetActive()) {
return false;
}
switch (evt.keyCode) {
case cvox.SearchConstants.KeyCode.UP:
cvox.SearchTool.menuItemIndex = cvox.SearchUtil.subOneWrap(
cvox.SearchTool.menuItemIndex, cvox.SearchTool.menuItems.length);
cvox.SearchTool.syncToMenuItem();
break;
case cvox.SearchConstants.KeyCode.DOWN:
cvox.SearchTool.menuItemIndex = cvox.SearchUtil.addOneWrap(
cvox.SearchTool.menuItemIndex, cvox.SearchTool.menuItems.length);
cvox.SearchTool.syncToMenuItem();
break;
case cvox.SearchConstants.KeyCode.LEFT:
cvox.SearchTool.toggleMenu();
cvox.SearchTool.menuIndex = cvox.SearchUtil.subOneWrap(
cvox.SearchTool.menuIndex, cvox.SearchTool.menus.length);
cvox.SearchTool.syncToMenu();
break;
case cvox.SearchConstants.KeyCode.RIGHT:
cvox.SearchTool.toggleMenu();
cvox.SearchTool.menuIndex = cvox.SearchUtil.addOneWrap(
cvox.SearchTool.menuIndex, cvox.SearchTool.menus.length);
cvox.SearchTool.syncToMenu();
break;
case cvox.SearchConstants.KeyCode.ENTER:
cvox.SearchTool.gotoMenuItem();
break;
default:
return false;
}
evt.preventDefault();
evt.stopPropagation();
return true;
};
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