Skip to content

Instantly share code, notes, and snippets.

Show Gist options
  • Save HugoHeneault/c513266de336eb0eeb02 to your computer and use it in GitHub Desktop.
Save HugoHeneault/c513266de336eb0eeb02 to your computer and use it in GitHub Desktop.
// Create new object to cache iframe offsets
$.ui.ddmanager.frameOffsets = {};
// Override the native `prepareOffsets` method. This is almost
// identical to the un-edited method, except for the last part!
$.ui.ddmanager.prepareOffsets = function (t, event) {
var i, j,
m = $.ui.ddmanager.droppables[t.options.scope] || [],
type = event ? event.type : null, // workaround for #2317
list = (t.currentItem || t.element).find(":data(ui-droppable)").addBack(),
doc, frameOffset;
droppablesLoop: for (i = 0; i < m.length; i++) {
//No disabled and non-accepted
if (m[i].options.disabled || (t && !m[i].accept.call(m[i].element[0], (t.currentItem || t.element)))) {
continue;
}
// Filter out elements in the current dragoged item
for (j = 0; j < list.length; j++) {
if (list[j] === m[i].element[0]) {
m[i].proportions().height = 0;
continue droppablesLoop;
}
}
m[i].visible = m[i].element.css("display") !== "none";
if (!m[i].visible) {
continue;
}
//Activate the droppable if used directly from draggables
if (type === "mousedown") {
m[i]._activate.call(m[i], event);
}
// Re-calculate offset
m[i].offset = m[i].element.offset();
// Re-calculate proportions (jQuery UI ~1.10 introduced a `proportions` cache method, so support both here!)
proportions = { width: m[i].element[0].offsetWidth, height: m[i].element[0].offsetHeight };
typeof m[i].proportions === 'function' ? m[i].proportions(proportions) : (m[i].proportions = proportions);
/* ============ Here comes the fun bit! =============== */
// If the element is within an another document...
if ((doc = m[i].document[0]) !== document) {
// Determine in the frame offset using cached offset (if already calculated)
frameOffset = $.ui.ddmanager.frameOffsets[doc];
if (!frameOffset) {
// Calculate and cache the offset in our new `$.ui.ddmanager.frameOffsets` object
frameOffset = $.ui.ddmanager.frameOffsets[doc] = $(
// Different browsers store it on different properties (IE...)
(doc.defaultView || doc.parentWindow).frameElement
).offset();
}
// Add the frame offset to the calculated offset
m[i].offset.left += frameOffset.left;
m[i].offset.top += frameOffset.top;
}
}
};
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment