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// $Id$
var Drupal = Drupal || {};
/**
* Set the variable that indicates if JavaScript behaviors should be applied
*/
Drupal.jsEnabled = document.getElementsByTagName && document.createElement && document.createTextNode && document.documentElement && document.getElementById;
/**
* Extends the current object with the parameter. Works recursively.
*/
Drupal.extend = function(obj) {
for (var i in obj) {
if (this[i]) {
Drupal.extend.apply(this[i], [obj[i]]);
}
else {
this[i] = obj[i];
}
}
};
/**
* Redirects a button's form submission to a hidden iframe and displays the result
* in a given wrapper. The iframe should contain a call to
* window.parent.iframeHandler() after submission.
*/
Drupal.redirectFormButton = function (uri, button, handler) {
// Trap the button
button.onmouseover = button.onfocus = function() {
button.onclick = function() {
// Create target iframe
Drupal.createIframe();
// Prepare variables for use in anonymous function.
var button = this;
var action = button.form.action;
var target = button.form.target;
// Redirect form submission to iframe
this.form.action = uri;
this.form.target = 'redirect-target';
handler.onsubmit();
// Set iframe handler for later
window.iframeHandler = function () {
var iframe = $('#redirect-target').get(0);
// Restore form submission
button.form.action = action;
button.form.target = target;
// Get response from iframe body
try {
response = (iframe.contentWindow || iframe.contentDocument || iframe).document.body.innerHTML;
// Firefox 1.0.x hack: Remove (corrupted) control characters
response = response.replace(/[\f\n\r\t]/g, ' ');
if (window.opera) {
// Opera-hack: it returns innerHTML sanitized.
response = response.replace(/"/g, '"');
}
}
catch (e) {
response = null;
}
response = Drupal.parseJson(response);
// Check response code
if (response.status == 0) {
handler.onerror(response.data);
return;
}
handler.oncomplete(response.data);
return true;
}
return true;
}
}
button.onmouseout = button.onblur = function() {
button.onclick = null;
}
};
/**
* Retrieves the absolute position of an element on the screen
*/
Drupal.absolutePosition = function (el) {
var sLeft = 0, sTop = 0;
var isDiv = /^div$/i.test(el.tagName);
if (isDiv && el.scrollLeft) {
sLeft = el.scrollLeft;
}
if (isDiv && el.scrollTop) {
sTop = el.scrollTop;
}
var r = { x: el.offsetLeft - sLeft, y: el.offsetTop - sTop };
if (el.offsetParent) {
var tmp = Drupal.absolutePosition(el.offsetParent);
r.x += tmp.x;
r.y += tmp.y;
}
return r;
};
/**
* Return the dimensions of an element on the screen
*/
Drupal.dimensions = function (el) {
return { width: el.offsetWidth, height: el.offsetHeight };
};
/**
* Returns the position of the mouse cursor based on the event object passed
*/
Drupal.mousePosition = function(e) {
return { x: e.clientX + document.documentElement.scrollLeft, y: e.clientY + document.documentElement.scrollTop };
};
/**
* Parse a JSON response.
*
* The result is either the JSON object, or an object with 'status' 0 and 'data' an error message.
*/
Drupal.parseJson = function (data) {
if ((data.substring(0, 1) != '{') && (data.substring(0, 1) != '[')) {
return { status: 0, data: data.length ? data : 'Unspecified error' };
}
return eval('(' + data + ');');
};
/**
* Create an invisible iframe for form submissions.
*/
Drupal.createIframe = function () {
if ($('#redirect-holder').size()) {
return;
}
// Note: some browsers require the literal name/id attributes on the tag,
// some want them set through JS. We do both.
window.iframeHandler = function () {};
var div = document.createElement('div');
div.id = 'redirect-holder';
$(div).html('<iframe name="redirect-target" id="redirect-target" class="redirect" onload="window.iframeHandler();"></iframe>');
var iframe = div.firstChild;
$(iframe)
.attr({
name: 'redirect-target',
id: 'redirect-target'
})
.css({
position: 'absolute',
height: '1px',
width: '1px',
visibility: 'hidden'
});
$('body').append(div);
};
/**
* Delete the invisible iframe
*/
Drupal.deleteIframe = function () {
$('#redirect-holder').remove();
};
/**
* Freeze the current body height (as minimum height). Used to prevent
* unnecessary upwards scrolling when doing DOM manipulations.
*/
Drupal.freezeHeight = function () {
Drupal.unfreezeHeight();
var div = document.createElement('div');
$(div).css({
position: 'absolute',
top: '0px',
left: '0px',
width: '1px',
height: $('body').css('height')
}).attr('id', 'freeze-height');
$('body').append(div);
};
/**
* Unfreeze the body height
*/
Drupal.unfreezeHeight = function () {
$('#freeze-height').remove();
};
/**
* Wrapper to address the mod_rewrite url encoding bug
* (equivalent of drupal_urlencode() in PHP).
*/
Drupal.encodeURIComponent = function (item, uri) {
uri = uri || location.href;
item = encodeURIComponent(item).replace('%2F', '/');
return uri.indexOf('?q=') ? item : item.replace('%26', '%2526').replace('%23', '%2523');
};
// Global Killswitch on the <html> element
if (Drupal.jsEnabled) {
document.documentElement.className = 'js';
}
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