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egroupware_official/etemplate/js/ajax_select.js
2010-02-15 20:40:34 +00:00

444 lines
11 KiB
JavaScript

/**
* Javascript file for AJAX select widget
*
* @author Nathan Gray <nathangray@sourceforge.net>
*
* @param widget_id the id of the ajax_select_widget
* @param onchange function to call if the value of the select widget is changed
* @param options the query object containing callback and settings
*
* @license http://opensource.org/licenses/gpl-license.php GPL - GNU General Public License
* @package etemplate
* @subpackage extensions
* @link http://www.egroupware.org
*
* @version $Id$
*/
//xajaxDebug = 1;
var current_app = 'etemplate';
/**
* Settings for the timeout to prevent flooding the server with requests
*
* Adjust ajax_select_timeout to change how long to wait before sending the request (in ms)
*/
var ajax_select_timer_id = 0;
var ajax_select_timeout = 300;
var ajax_select_event = null;
// These keys will not trigger a search if the results box is currently displayed
var no_search_keys = [
'9', // Tab
'38', '63232', // Up
'40', '63233' // Down
];
function ajax_select_widget_setup(widget_id, onchange, options, currentapp) {
current_app = currentapp;
if(onchange) {
if(onchange == 1) {
onchange = function() {submitit(this.form, this.value);};
} else {
eval("onchange = function(e) { " + onchange + ";}");
}
var value = document.getElementById(widget_id + '[value]');
if(value) {
if(value.addEventListener) {
value.addEventListener('change', onchange, true);
} else {
var old = (value.onchange) ? value.onchange : function() {};
value.onchange = function(e) {
old(e);
onchange(e);
};
}
}
}
var widget = document.getElementById(widget_id + '[search]');
if(widget) {
widget.setAttribute('autocomplete', 'off');
if(widget.addEventListener) {
widget.addEventListener('keydown', checkKey, true);
widget.addEventListener('keyup', timer_change, false);
widget.addEventListener('blur', hideBox, false);
} else {
widget.onkeyup = timer_change;
widget.onblur = hideBox;
widget.onkeydown = checkKey;
}
// Set results
var results = document.createElement('div');
results.id = widget_id + '[results]';
results.className = 'resultBox';
results.style.position = 'absolute';
// check if IE, if it is, fix the position
if (document.all) {
results.style.marginLeft = 0 - widget.offsetWidth - 2 * widget.offsetLeft - 1;
results.style.marginTop = widget.offsetHeight + 1;
}
results.style.zIndex = 50;
results.options = options;
results.innerHTML = "";
widget.parentNode.appendChild(results);
}
var value = document.getElementById(widget_id + '[value]');
if(value) {
value.style.display = 'none';
}
}
function checkKey(e, value) {
if(!e) {
var e = window.event;
}
/*
* We check for Tab, Up and Down
*/
var interested = false;
for(var i = 0; i < no_search_keys.length; i++) {
if(e.keyCode == no_search_keys[i]) {
interested = true;
break;
}
}
if (!interested) {
return; // The user has not pressed anything we're interested in
}
if(e.target) {
var target = e.target;
} else if (e.srcElement) {
var target = e.srcElement;
}
if(target) {
if (target.nodeType == 3) { // defeat Safari bug
target = target.parentNode;
}
}
var id = target.id;
var base_id = id.substr(0, id.lastIndexOf('['));
var results = document.getElementById(base_id + '[results]');
// Consume event so search doesn't go
if(results.childNodes.length > 0) {
e.cancelBubble = true;
if(e.stopPropegation) e.stopPropegation();
clearTimeout(ajax_select_timer_id);
} else {
return false;
}
// Up and down arrows
switch (e.keyCode) {
// Up
case 38:
case 63232:
if(results.current) {
results.current.className = results.current.className.replace(' resultBoxSelected','');
}
if(results.current && results.current.previousSibling && results.current.previousSibling.childNodes.length > 2) {
results.current = results.current.previousSibling;
} else {
var elements = results.childNodes;
results.current = elements[elements.length - 1];
}
results.current.className += ' resultBoxSelected';
break;
// Down
case 40:
case 63233:
if(results.current) {
results.current.className = results.current.className.replace(' resultBoxSelected','');
}
if(results.current && results.current.nextSibling && results.current.nextSibling.childNodes.length > 2) {
results.current = results.current.nextSibling;
} else {
var elements = results.childNodes;
for (var i = 0; i < elements.length; i++) {
elem = elements.item(i);
if (elem.value) {
results.current = elem;
break; // We have found the first selection
}
}
}
results.current.className += ' resultBoxSelected';
break;
// Tab: Select current element
case 9:
var elem;
if(results.current && results.current.value) {
elem = results.current;
} else {
var elements = document.getElementById(base_id + '[results]').childNodes;
for (var i = 0; i < elements.length; i++) {
elem = elements.item(i);
if (elem.value) {
break; // We have found the first selection
}
}
}
if (!elem) return;
var event;
if(document.createEvent && document.dispatchEvent) {
// Most
event = document.createEvent('MouseEvents');
event.initEvent('click', true, true);
elem.dispatchEvent(event);
} else {
// IE
event = document.createEventObject();
elem.fireEvent('onclick', event);
}
break;
}
}
/**
* Set a timeout to prevent user from flooding the server with requests as
* they type. Waits to see if the user is still typing before sending the
* request. Adjust ajax_select_timeout to change how long to wait (in ms).
*/
function timer_change(e, value) {
if ( ajax_select_timer_id != 0) {
clearTimeout(ajax_select_timer_id);
}
if(!e) {
var e = cloneObject(window.event);
} else {
var e = cloneObject(e);
}
ajax_select_event = e;
ajax_select_timer_id = setTimeout(
function() {
change(e, value);
},
ajax_select_timeout
);
}
function change(e, value) {
if(!e) {
var e = window.event;
}
if(e.target) {
var target = e.target;
} else if (ajax_select_event) {
var e = ajax_select_event;
ajax_select_event = null;
if(e.target) {
var target = e.target;
} else if (e.srcElement) {
var target = e.srcElement;
}
} else if (e.srcElement) {
var target = e.srcElement;
}
if(target) {
if (target.nodeType == 3) { // defeat Safari bug
target = target.parentNode;
}
var id = target.id;
var value = target.value;
} else if (typeof(e) == 'string' ) {
var id = e;
if(value) {
var value = value;
} else {
var value = e.value;
}
var set_id = id.substr(0, id.lastIndexOf('['));
} else {
alert('Error in events');
return;
}
var base_id = id.substr(0, id.lastIndexOf('['));
if(document.getElementById(base_id + '[results]')) {
set_id = base_id + '[results]';
/*
* We check for Tab, Up and Down
*/
var interested = false;
var keycode = '';
for(var i = 0; i < no_search_keys.length; i++) {
if(e.which) {
keycode = e.which;
} else if(e && e.keyCode) {
keycode = e.keyCode;
}
if(keycode == no_search_keys[i]) {
interested = true;
break;
}
}
if (interested && document.getElementById(set_id).style.display == 'block') {
clearTimeout(ajax_select_timer_id);
return; // Results are shown, allow keys to move the selection cursor
}
} else {
set_id = base_id + '[search]';
}
var query = document.getElementById(set_id).options;
if(document.getElementById(base_id + '[filter]')) {
query.filter = document.getElementById(base_id + '[filter]').value;
}
// Hide selectboxes for IE
if(document.all) {
var selects = document.getElementsByTagName('select');
for(var i = 0; i < selects.length; i++) {
selects[i].style.visibility = 'hidden';
}
}
xajax_doXMLHTTP(current_app + ".ajax_select_widget.ajax_search.etemplate", id, value, set_id, query, document.getElementById('etemplate_exec_id').value);
}
/**
* Deep copy an object
* Used because IE thinks its a good idea to use a global var for events
*/
function cloneObject(obj) {
var clone = {};
for(var i in obj) {
clone[i] = obj[i];
}
return clone;
}
/* Remove options from a results box
* @param id - The id of the select
*/
function remove_ajax_results(id) {
if(document.getElementById(id)) {
var element = document.getElementById(id);
if (element.tagName == 'DIV') {
element.innerHTML = '';
}
}
}
/* Add an option to a result box
* @param id - The id of the result box
* @param key - The key of the option
* @param value - The value of the option
* @param row - The html for the row to display
*/
function add_ajax_result(id, key, value, row) {
var resultbox = document.getElementById(id);
if(resultbox) {
if (resultbox.tagName == 'DIV') {
var base_id = resultbox.id.substr(0, resultbox.id.lastIndexOf('['));
var search_id = base_id + '[search]';
var value_id = base_id + '[value]';
resultbox.style.display = 'block';
var result = document.createElement('div');
result.className = (resultbox.childNodes.length % 2) ? 'row_on' : 'row_off';
if(key) {
result.value = new Object();
result.value.key = key;
result.value.value = value;
result.value.search_id = search_id;
result.value.value_id = value_id;
result.innerHTML = row;
// when they click, add that item to the value hidden textbox
if(result.addEventListener) {
result.addEventListener('click', select_result, true);
} else {
result.onclick = select_result;
}
} else {
result.innerHTML += row + "<br />";
}
resultbox.appendChild(result);
}
}
}
function select_result(e) {
// when they click, add that item to the value textbox & call onchange()
if(!e) {
var e = window.event;
}
if(e.target) {
var target = e.target;
} else if (e.srcElement) {
var target = e.srcElement;
}
while(!target.value && target != document) {
target = target.parentNode;
}
var value = document.getElementById(target.value.value_id);
var search = document.getElementById(target.value.search_id);
if(value) {
value.value = target.value.key;
}
if(search) {
var string = target.value.value;
string = string.replace(/&amp;/g, '&');
string = string.replace(/&lt;/g, '<');
string = string.replace(/&gt;/g, '>');
search.value = string;
var event;
if(document.createEvent) {
// Most
event = document.createEvent('HTMLEvents');
event.initEvent('change', true, true);
return value.dispatchEvent(event);
} else {
// IE
event = document.createEventObject();
return value.fireEvent('onchange', event);
}
}
}
function hideBox(e) {
if(!e) {
var e = window.event;
}
if(e.target) {
var target = e.target;
} else if (e.srcElement) {
var target = e.srcElement;
}
if(target) {
if (target.nodeType == 3) { // defeat Safari bug
target = target.parentNode;
}
}
var set_id = target.id.substr(0, target.id.lastIndexOf('[')) + '[results]';
setTimeout("document.getElementById('" + set_id + "').style.display = 'none'", 200);
var selects = document.getElementsByTagName('select');
// Un-hide select boxes for IE
if(document.all) {
for(var i = 0; i < selects.length; i++) {
selects[i].style.visibility = 'visible';
}
}
}