CODEWITHSUNDEEP
javascriptadobe-indesignextendscript
goatduster
goatduster

Reputation: 23

Create swatches based on existing swatch with extendscript (javascript)

I'd like to create many color swatches in InDesign based on an existing color swatch. I would like to take the numbers of the existing swatch, and create new swatches by adding values, i.e. Cyan +1, Magenta +2, Yellow +0, Black +0. Thank you!

Upvotes: 0

Views: 1227

Answers (2)

Yuri Khristich
Yuri Khristich

Reputation: 14537

Here is the rather simple straightforward implementation:

var COLORS = app.activeDocument.colors;
var BASE = COLORS.itemByName("BASE");

function add_color(name,c,m,y,k) {
    var color = COLORS.add();
        color.space = ColorSpace.CMYK;
        color.colorValue = [
            BASE.colorValue[0] + c,
            BASE.colorValue[1] + m,
            BASE.colorValue[2] + y,
            BASE.colorValue[3] + k ];
        color.name = get_name(name);
}

// color names should not be the same, it adds "+" to the repeated names
function get_name(name) {
    try {
        return get_name(COLORS.itemByName(name).name + "+");
    } catch(e) {
        return name;
    }
}

add_color("#1", 1, 0, 0, 0);
add_color("#2", 0, 1, 0, 0);
add_color("#3", 0, 0, 1, 0);
add_color("#4", 0, 0, 0, 1);

add_color("#5",-1, 0, 0, 0);
add_color("#6", 0,-1, 0, 0);
add_color("#7", 0, 0,-1, 0);
add_color("#8", 0, 0, 0,-1);

Perhaps you need to think of better way to handle the repeated color names.

Upvotes: 1

Brenden
Brenden

Reputation: 2097

Something like this should do the job.

const clamp = (value, min, max) => Math.max(min, Math.min(value, max));

// value: { c: number, m: number, y: number, k: number }
const swatch = (value) => {
  const results = [];
  const keys = ['c', 'm', 'y', 'k'];

  for (let i = 1; i >= -1; i -= 2) {
    for (let key of keys) {
      if (clamp(value[key] + i, 0, 100) != value[key]) {
        results.push({ ...value, [key]: value[key] + i });
      }
    }
  }
  
  return results;
};

console.log(swatch({
  c: 40,
  m: 20,
  y: 40,
  k: 20
}));

Upvotes: 1

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