Illustrator Word Spacing Script

Hi @Brian32453879u67v (and others), I am late to this thread, but I've done a fair bit of this type of thing before, so I've put together a function that, given one or more text frames, will space the text (by adjusting leading) so that the space between lines is an exact amount. Not tested much at all at this stage. See how it goes.

- Mark

/**
 * @file Set Space Between Text Lines.js
 * Demonstrates `setSpaceBetweenTextLines` function.
 * Usage: select one or more text frames and run script.
 * @author m1b
 * @discussion https://community.adobe.com/t5/illustrator-discussions/illustrator-word-spacing-script/m-p/14439010
 */
(function () {

    var doc = app.activeDocument,
        textFrames = doc.selection;

    if (0 === textFrames.length)
        return alert('Please select one or more text frames and try again.');

    var spacing = prompt('Enter line spacing amount, in points:', 0);

    if (
        null !== spacing
        && !isNaN(Number(spacing))
    )
        setSpaceBetweenTextLines(doc, textFrames, Number(spacing));

})();


/**
 * Given a text frame, will adjust leading
 * so the distance between glyphs on each line
 * matches `spacing` value.
 * @author m1b
 * @version 2024-02-27
 * @param {Document} doc - an Illustrator Document.
 * @param {TextFrame|Array<TextFrame>} textFrame - the text frame to adjust, or array of text frames.
 * @param {Number} [spacing] - the desired spacing, in points, between lines (default: 0).
 */
function setSpaceBetweenTextLines(doc, textFrame, spacing) {

    spacing = spacing || 0;

    if ('Array' === textFrame.constructor.name) {

        // handle array of textFrames
        for (var i = 0; i < textFrame.length; i++)
            setSpaceBetweenTextLines(doc, textFrame[i], spacing);

        return;

    }

    else if (!textFrame.hasOwnProperty('story'))
        throw Error('setSpaceBetweenTextLines: bad `text` supplied.');

    if ('TextFrame' !== textFrame.constructor.name)
        textFrame = textFrame.story.textFrames[0];

    // set the leading to absolute
    convertToAbsoluteLeading(textFrame);

    // add extra gap between lines
    textFrame.textRange.leading += 100;

    // get the outlined text grouped into lines
    var outlines = outlineTextLines(doc, textFrame.duplicate());

    for (var i = 1, y1, y2; i < outlines.length; i++) {

        y1 = outlines[i - 1].geometricBounds[3];
        y2 = outlines[i].geometricBounds[1];

        // set text line's leading
        textFrame.lines[i].leading += (y2 - y1) + spacing;

    }

    // clean up
    for (var i = outlines.length - 1; i >= 0; i--)
        outlines[i].remove();

};


/**
 * Returns `textFrame` converted into outlines, grouped into "lines".
 * NOTE: `textFrame` will be destroyed.
 * @author m1b
 * @version 2024-02-27
 * @param {Document} doc - an Illustrator Document.
 * @param {TextFrame} textFrame - a TextFrame.
 * @returns {Array<GroupItem>}
 */
function outlineTextLines(doc, textFrame) {

    var leadings = Array(textFrame.lines.length),
        groups = Array(textFrame.lines.length);

    // create a group for each line
    for (var i = 0; i < textFrame.lines.length; i++) {
        leadings[i] = textFrame.lines[i].leading;
        groups[i] = doc.groupItems.add();
        groups[i].move(textFrame, ElementPlacement.PLACEBEFORE);
    }

    var outlines = textFrame.createOutline(),
        items = outlines.pageItems,
        leadingPositions = [];

    // get the bottom of each line (top of bounds to bottom of leading)
    for (var i = 0, bottom = outlines.geometricBounds[1]; i < leadings.length; i++) {
        bottom -= leadings[i];
        leadingPositions.push(bottom);
    }

    // collect each item into its line
    // by comparing bottom of outlined character
    // against bottom of leading
    itemsLoop:
    for (var i = items.length - 1, y; i >= 0; i--) {

        y = items[i].geometricBounds[3];

        leadingsLoop:
        for (var j = 0; j < leadings.length; j++) {

            if (y > leadingPositions[j]) {
                items[i].move(groups[j], ElementPlacement.PLACEATEND);
                // lines[j].push(items[i]);
                continue itemsLoop;
            }

        }

    }

    // remove the original group
    outlines.remove();

    return groups;

};


/**
 * Sets the text frame's leading
 * to an absolute value.
 * @param {TextFrame} textFrame
 */
function convertToAbsoluteLeading(textFrame) {

    var oldLeading = textFrame.textRange.leading;
    textFrame.textRange.autoLeading = false;
    textFrame.textRange.leading = oldLeading;

};

Bonjour Rian,

Ce que vous voulez correspond t'il à cet exemple ?

Le texte peut-être vectorisé ?

René

Femkeblanko wrote something that determines the coordinates of the start and end of an area frame. It takes a text frame and creates a duplicate to outline which you can then get precise top/bottom coords for the text. This could be 1 approach, would just have to be reconfigured for your needs.

https://community.adobe.com/t5/illustrator-discussions/how-to-get-textrange-each-line-start-and-end-character-cooridnates-using-extendscript/td-p/14422468

alternatively, you could try making an algorithm of sorts to determine the text height based on typeface pt size. I've tried such before, but it's usually not perfect.