#target indesign;

doc = app.activeDocument;

// Collect all text variables defined in the doc. and their values.
// Returns two-element array: text_vars[0] contains the names of variables,
// text_vars[1], their values.
text_vars = text_variables (app.activeDocument);

// Show dialog. text_vars[0] is used for the labels,
// text_vars[1] for the values in the edit fields.
updated_vars = get_updates (text_vars[0], text_vars[1]);

// Update the text variables
update_variables (app.activeDocument, updated_vars[0], updated_vars[1]);


function update_variables (doc, var_names, var_values)
	{
	var v = doc.textVariables;
	for (var i = 0; i < var_names.length; i++)
		v.item (var_names[i]).variableOptions.contents = var_values[i];
	}


function text_variables (doc)
	{
	var v = doc.textVariables;
	var v_names = [];	//variable names in dialog
	var v_values = [];	//values in dialog
	for (var i = 0; i < v.length; i++)
		{
		if (v[i].variableType == VariableTypes.customTextType)
			{
			v_names.push (v[i].name);
			v_values.push (v[i].variableOptions.contents);
			}
		}
	return [v_names, v_values]
	}


function get_updates (v_names, v_values)	// v_names and val are arrays
	{
	var w = new Window ('dialog', 'Update text variables');
	w.orientation = 'row';
	w.alignChildren = ['left', 'top'];
	var p = w.add ('panel');
	p.orientation = 'column';

	var g = [];
	var new_val = [];
	var s = [];
	for (var i = 0; i < v_names.length; i++)
		{
		g[i] = p.add ('group');
		s[i] = g[i].add ('statictext', undefined, v_names[i]);
		new_val[i] = g[i].add ('edittext');
		new_val[i].text = v_values[i];
		s[i].preferredSize = [75,20];
		new_val[i].preferredSize = [150,20];
		}
	new_val[0].active = true;
	
	var button_group = w.add ('group');
		button_group.orientation = 'column';
		ok_button = button_group.add('button', undefined, 'OK');
		ok_button.preferredSize = [80,25];
		cancel_button = button_group.add ('button', undefined, 'Cancel');
		cancel_button.preferredSize = [80,25];

	if (w.show() == 2)
			exit();
	return [v_names, to_text (new_val)]
	}


function to_text (edit_object)
	{
	var temp = [];
	for (var i = 0; i < edit_object.length; i++)
		temp.push (edit_object[i].text);
	return temp
	}