Hi @Dylan33363180v1v2, it is a little more fiddly than you might expect, just because you have to get at the overprint setting differently for different page items. You will see in the following script that I wrote to do what you are asking. Let me know if this works for you.
- Mark
/**
* Set overprint for page items.
* @author m1b
* @discussion https://community.adobe.com/t5/illustrator-discussions/interacting-with-overprint-using-scripts/m-p/14206629
*/
(function () {
var OVERPRINT_SETTING = false;
var doc = app.activeDocument;
// example usage 1: selection
var items = itemsInsideGroupItems(doc.selection);
// example usage 2: all page items in document
// var items = itemsInsideGroupItems(doc.pageItems);
for (var i = 0; i < items.length; i++)
setOverprintOfItem(items[i], OVERPRINT_SETTING);
})();
/**
* Sets item's overprinting to `value`.
* @author m1b
* @version 2023-11-04
* @param {PageItem} item - an Illustrator page item.
* @param {Boolean} value - the value to set to.
* @returns {Object} - {fillColors: Array<Color>, strokeColors: Array<Color>}
*/
function setOverprintOfItem(item, value) {
if (item == undefined)
throw Error('getBasicColorablesFromItem: No `item` supplied.');
// collect all the overprintables
if (item.constructor.name == 'PathItem') {
setOverprint(item, value);
}
else if (
item.constructor.name == 'CompoundPathItem'
&& item.pathItems
) {
setOverprint(item.pathItems[0], value);
}
else if (
item.constructor.name == 'TextFrame'
&& item.textRanges
) {
var ranges = getTextStyleRanges(item.textRange, ['overprintFill', 'overprintStroke']);
for (var i = ranges.length - 1; i >= 0; i--)
setOverprint(ranges[i], value);
}
else if (item.constructor.name == 'GroupItem') {
for (var i = 0; i < item.pageItems.length; i++)
setOverprint(item.pageItems[i], value);
}
// helper function
function setOverprint(item, value) {
// most basic page items
if (item.hasOwnProperty('fillOverprint')) {
item.fillOverprint = value;
item.strokeOverprint = value;
}
// text style ranges
else if (item.hasOwnProperty('overprintFill')) {
item.overprintFill = value;
item.overprintStroke = value;
}
};
};
/**
* Returns an array containing items,
* including items found inside GroupItems.
* Optionally can supply a filter function.
* @author m1b
* @param {Array<PageItem>} items - the starting items, may include group items.
* @param {Function} [filter] - whether to collect item (default: collect all).
* @returns {Array<PageItem>}
*/
function itemsInsideGroupItems(items, filter) {
var found = [];
for (var i = 0; i < items.length; i++) {
var item = items[i];
if (item.typename == 'GroupItem')
found = found.concat(itemsInsideGroupItems(item.pageItems, filter));
else if (
filter == undefined
|| filter(item)
)
found.push(item);
}
return found;
};
/**
* Returns an array of TextRanges,
* determined by mapping changes
* in supplied keys. For example,
* supplying the 'fillColor' key
* will return ranges divided when
* the text's fillColor changes.
* @author m1b
* @version 2023-04-26
* @param {TextRange} textRange - an Illustrator TextRange.
* @param {Array<String>} keys - an array of keys to match, eg ['fillColor'].
*/
function getTextStyleRanges(textRange, keys) {
if (
textRange == undefined
|| textRange.constructor.name != 'TextRange'
)
throw Error('getTextStyleRanges: bad `textRange` supplied.');
if (
keys == undefined
|| keys.constructor.name != 'Array'
)
throw Error('getTextStyleRanges: bad `textRange` supplied.');
// check keys are valid
for (var j = 0; j < keys.length; j++)
if (!textRange.characterAttributes.hasOwnProperty(keys[j]))
throw Error('getTextStyleRanges: bad key supplied ("' + keys[j] + '")');
var ranges = [],
start = 0,
currentValues = {};
charactersLoop:
for (var i = 0; i < textRange.length; i++) {
var tr = textRange.textRanges[i],
matches = true;
// check each key
keysLoop:
for (var j = 0; j < keys.length; j++) {
if (i == 0)
currentValues[keys[j]] = tr.characterAttributes[keys[j]];
else if (stringify(tr.characterAttributes[keys[j]]) !== stringify(currentValues[keys[j]])) {
matches = false;
break keysLoop;
}
}
currentValues[keys[j]] = tr.characterAttributes[keys[j]];
if (
i == textRange.length - 1
|| !matches
) {
// start a new range
var newTextRange = textRange.textRanges[start];
newTextRange.end = i == textRange.length - 1 ? i + 1 : i;
ranges.push(newTextRange);
start = i;
}
}
return ranges;
};
/**
* Stringify tailored for the purpose of
* identifying overprintable text ranges.
* @author m1b
* @version 2023-04-26
* @param {Object} obj - the object to stringify.
* @returns {String}
*/
function stringify(obj) {
var str = obj.toString();
for (var key in obj) {
if (!obj.hasOwnProperty(key))
continue;
if (
key == 'overprintFill'
|| key == 'overprintStroke'
)
str += stringify(obj[key]);
else
str += obj[key];
}
return str;
};
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