So, here's an updated script that scales target object(s) strokes proportionally to the scale factor. The updated script also accounts for clipping masks on the target objects when scaling.
PLEASE NOTE, the first script doesn't account for a "source" object that may be clipped. If this is not a case you need to cover then you should be set. If there is a chance you may need to get the "true visible bounds" for the source object then that script would need to be updated as well to use the `getVisibleBounds()` function.
Take it for a spin and let me know if you have any issues. Cheers!
// scale_apply.jsx
// get source bounds from first script
var sourceBounds = eval($.getenv("scaleTargetBounds"));
// iterate over each selected object and scale to match source object width
var target, targetBounds, scaleFactor, strokeScaleFactor, scaleMatrix;
for (var i = 0; i < app.activeDocument.selection.length; i++) {
target = app.activeDocument.selection[i];
// get the true visible bounds of the target object (accounting for clipping masks)
targetBounds = getVisibleBounds(target);
// calculate the scale factor between the source and current target widths
scaleFactor =
((sourceBounds[2] - sourceBounds[0]) / (targetBounds[2] - targetBounds[0])) * 100;
strokeScaleFactor =
(sourceBounds[2] - sourceBounds[0]) / (targetBounds[2] - targetBounds[0]);
// generate a scale matrix
scaleMatrix = app.getScaleMatrix(scaleFactor, scaleFactor);
// apply the matrix using the transform method
// https://ai-scripting.docsforadobe.dev/jsobjref/PageItem.html#pageitem-transform
target.transform(
scaleMatrix,
true, // change positions
true, // change fill patterns
true, // change fill gradients
true, // change stroke patterns
strokeScaleFactor, // change stroke width
Transformation.CENTER // anchor point https://ai-scripting.docsforadobe.dev/jsobjref/scripting-constants.html#transformation
);
}
/**
* Determine the actual "visible" bounds for an object if clipping mask or compound path items are found.
* @Param {PageItem} o A single Adobe Illustrator pageItem.
* @Returns {Array} Object bounds [left, top, right, bottom].
*/
function getVisibleBounds(o) {
var bounds, clippedItem, sandboxItem, sandboxLayer;
var curItem;
// skip guides (via william dowling @ github.com/wdjsdev)
if (o.guides) {
return undefined;
}
if (o.typename == "GroupItem") {
// if the group has no pageItems, return undefined
if (!o.pageItems || o.pageItems.length == 0) {
return undefined;
}
// if the object is clipped
if (o.clipped) {
// check all sub objects to find the clipping path
for (var i = 0; i < o.pageItems.length; i++) {
curItem = o.pageItems[i];
if (curItem.clipping) {
clippedItem = curItem;
break;
} else if (curItem.typename == "CompoundPathItem") {
if (!curItem.pathItems.length) {
// catch compound path items with no pathItems (via William Dowling @ github.com/wdjsdev)
sandboxLayer = app.activeDocument.layers.add();
sandboxItem = curItem.duplicate(sandboxLayer);
app.activeDocument.selection = null;
sandboxItem.selected = true;
app.executeMenuCommand("noCompoundPath");
sandboxLayer.hasSelectedArtwork = true;
app.executeMenuCommand("group");
clippedItem = app.activeDocument.selection[0];
break;
} else if (curItem.pathItems[0].clipping) {
clippedItem = curItem;
break;
}
}
}
if (!clippedItem) {
clippedItem = o.pageItems[0];
}
bounds = clippedItem.geometricBounds;
if (sandboxLayer) {
// eliminate the sandbox layer since it's no longer needed
sandboxLayer.remove();
sandboxLayer = undefined;
}
} else {
// if the object is not clipped
var subObjectBounds;
var allBoundPoints = [[], [], [], []];
// get the bounds of every object in the group
for (var i = 0; i < o.pageItems.length; i++) {
curItem = o.pageItems[i];
subObjectBounds = getVisibleBounds(curItem);
for (var j = 0; j < subObjectBounds.length; j++) {
allBoundPoints[j].push(subObjectBounds[j]);
}
}
// determine the groups bounds from it sub object bound points
bounds = [
Math.min.apply(Math, allBoundPoints[0]),
Math.max.apply(Math, allBoundPoints[1]),
Math.max.apply(Math, allBoundPoints[2]),
Math.min.apply(Math, allBoundPoints[3]),
];
}
} else {
bounds = o.geometricBounds;
}
return bounds;
}
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