Hi @rui huang, there are two extra steps: (a) put groups into an Array, (b) sort by left bounds. See this script below.
- Mark
(function () {
var doc = app.activeDocument;
// note: this gives us a GroupItems object, not an Array
var groupsCollection = doc.groupItems;
// you can't sort a GroupItems collection
// so we'll populate an Array with the group items
var groups = [];
for (var i = 0; i < groupsCollection.length; i++)
groups[i] = groupsCollection[i];
// sort array by left bounds
groups.sort(sortByLeft);
// loop over groups, backwards
for (var i = groups.length - 1; i >= 0; i--) {
$.writeln('groups[i].left = ' + groups[i].left);
}
})();
/**
* Sort by left bounds.
* @param {PageItem} a - item to sort.
* @param {PageItem} b - item to sort.
* @returns {Number} - the sort code.
*/
function sortByLeft(a, b) {
return (
// left bounds value rounded to 3 decimal places
Math.round((a.visibleBounds[0] - b.visibleBounds[0]) * 1000) / 1000
// same left, so we'll sort by top bounds value
|| a.visibleBounds[1] - b.visibleBounds[1]
);
};
Note: that this will sort in ascending order of left position. But you are looping backwards, so you will start with the right-most first if you do it this way.
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