Question
I am trying to make a script to use in Illustrator for extraction Colors from Gradient & Saving ...
I am trying to make a script to use in Illustrator for extraction Colors from Gradient and Saving them to ColorGroup. Got stuck on Line: 51 "var newSwatch = colorGroup.addSwatch(color);" , can someone help?
Saying in advance.. I have many alerts which are not needed in script, but I used them in previous steps to debug when ran into issues before and just haven't cleaned it up for now.
#target illustrator
// Get the active document
var doc = app.activeDocument;
// Prompt user to select a gradient from the document
var gradientName = promptForGradient(doc);
alert("Selected gradientName: " + gradientName); // Display gradientName value
if (gradientName !== null) {
// Prompt user to enter the number of steps per percentage
var stepsPerPercentage = promptForStepsPerPercentage();
alert("Steps per percentage: " + stepsPerPercentage); // Display stepsPerPercentage value
if (stepsPerPercentage !== null) {
// Prompt user to enter the color group name
var colorGroupName = promptForColorGroupName();
alert("Color group name: " + colorGroupName); // Display colorGroupName value
if (colorGroupName !== null) {
// Check if the color group already exists
var colorGroup = getColorGroupByName(colorGroupName);
// If the color group doesn't exist, create it
if (colorGroup === null) {
colorGroup = doc.swatchGroups.add();
colorGroup.name = colorGroupName;
}
// Get the specified gradient from the document
var gradient = getGradientByName(gradientName);
if (gradient) {
// Extract colors from the gradient at each step
for (var i = 0; i <= 100; i++) {
var rampPoint = i / (100 * stepsPerPercentage);
var existingStop = findStopByRampPoint(gradient, rampPoint);
// Check if a gradient stop with the same ramp point already exists
if (existingStop !== null) {
// If a stop already exists, use its color instead of adding a new stop
var color = existingStop.color;
} else {
// If no stop exists, add a new gradient stop and get the color
var gradientStop = gradient.gradientStops.add();
gradientStop.rampPoint = rampPoint;
var color = gradientStop.color;
}
// Add the color to the color group
var newSwatch = colorGroup.addSwatch(color);
var r = Math.round(color.red);
var g = Math.round(color.green);
var b = Math.round(color.blue);
newSwatch.name = "R=" + r + " G=" + g + " B=" + b;
}
}
// Save the document with the extracted colors
var savePath = "~/Desktop/extracted_colors.ai";
doc.saveAs(new File(savePath));
// Close the document
// doc.close(SaveOptions.DONOTSAVECHANGES);
} else {
alert("Invalid color group name. Script execution terminated.");
}
} else {
alert("Invalid steps per percentage value. Script execution terminated.");
}
} else {
alert("No gradient selected. Script execution terminated.");
}
// Function to prompt user for selecting a gradient
function promptForGradient(doc) {
var gradientNames = [];
var numGradients = doc.gradients.length;
// Populate an array with gradient names
for (var i = 0; i < numGradients; i++) {
gradientNames.push(doc.gradients[i].name);
}
// Create a dialog box with dropdown menu for gradient selection
var dialog = new Window("dialog", "Select Gradient");
var dropdown = dialog.add("dropdownlist", undefined, gradientNames);
dropdown.selection = 0;
// Store the selected gradient name
var selectedGradientName = null;
// OK button event listener
dropdown.onChange = function () {
selectedGradientName = gradientNames[dropdown.selection.index];
};
// Add buttons to the dialog box
var buttonsGroup = dialog.add("group");
buttonsGroup.alignment = "right";
buttonsGroup.add("button", undefined, "OK");
buttonsGroup.add("button", undefined, "Cancel");
// OK button event listener
buttonsGroup.children[0].onClick = function () {
dialog.close(selectedGradientName);
};
// Cancel button event listener
buttonsGroup.children[1].onClick = function () {
dialog.close(null);
};
// Show the dialog box
dialog.show();
// Print the selected gradient name
if (selectedGradientName) {
alert("Selected gradientName: " + selectedGradientName);
}
return selectedGradientName;
}
// Function to prompt user for entering steps per percentage
function promptForStepsPerPercentage() {
var dialog = new Window("dialog", "Enter Steps Per Percentage");
dialog.add("statictext", undefined, "Steps per percentage:");
var inputBox = dialog.add("edittext", undefined, "1");
inputBox.characters = 5;
// Store the entered value
var enteredValue = null;
// Add buttons to the dialog box
var buttonsGroup = dialog.add("group");
buttonsGroup.alignment = "right";
buttonsGroup.add("button", undefined, "OK");
buttonsGroup.add("button", undefined, "Cancel");
// OK button event listener
buttonsGroup.children[0].onClick = function () {
var value = parseFloat(inputBox.text);
if (!isNaN(value) && value > 0) {
enteredValue = value;
dialog.close(enteredValue);
} else {
alert("Invalid steps per percentage value. Please enter a positive number.");
}
};
// Cancel button event listener
buttonsGroup.children[1].onClick = function () {
dialog.close(null);
};
// Show the dialog box
dialog.show();
// Print the entered value
if (enteredValue) {
alert("Entered steps per percentage: " + enteredValue);
}
return enteredValue;
}
// Function to prompt user for entering the color group name
function promptForColorGroupName() {
var dialog = new Window("dialog", "Enter Color Group Name");
dialog.add("statictext", undefined, "Color group name:");
var inputBox = dialog.add("edittext", undefined, "Extracted Colors");
inputBox.characters = 20;
// Store the entered value
var enteredValue = null;
// Add buttons to the dialog box
var buttonsGroup = dialog.add("group");
buttonsGroup.alignment = "right";
buttonsGroup.add("button", undefined, "OK");
buttonsGroup.add("button", undefined, "Cancel");
// OK button event listener
buttonsGroup.children[0].onClick = function () {
enteredValue = inputBox.text;
dialog.close(enteredValue);
};
// Cancel button event listener
buttonsGroup.children[1].onClick = function () {
dialog.close(null);
};
// Show the dialog box
dialog.show();
// Print the entered value
if (enteredValue) {
alert("Entered color group name: " + enteredValue);
}
return enteredValue;
}
// Function to retrieve gradient by name
function getGradientByName(name) {
var numGradients = doc.gradients.length;
// Iterate through the gradients and find the one with the matching name
for (var i = 0; i < numGradients; i++) {
var gradient = doc.gradients[i];
if (gradient.name === name) {
return gradient;
}
}
return null;
}
// Function to retrieve color group by name
function getColorGroupByName(name) {
var numColorGroups = doc.swatchGroups.length;
// Iterate through the color groups and find the one with the matching name
for (var i = 0; i < numColorGroups; i++) {
var colorGroup = doc.swatchGroups[i];
if (colorGroup.name === name) {
return colorGroup;
}
}
return null;
}
// Function to find a gradient stop by ramp point
function findStopByRampPoint(gradient, rampPoint) {
var numStops = gradient.gradientStops.length;
// Iterate through the gradient stops and find the one with the matching ramp point
for (var i = 0; i < numStops; i++) {
var stop = gradient.gradientStops[i];
if (stop.rampPoint === rampPoint) {
return stop;
}
}
return null;
}
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