Drafts Directory: Go to Line

Action

Posted by @edgauthier, Last update almost 6 years ago

Prompts for a line number and then jumps to the beginning of that line. Can be helpful when editing long scripts or other drafts where you know a specific line that you want to jump to.

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Steps

script

/**************************
 * Prompt utility methods *
 **************************
 */

// Creates a new prompt with a title and message
const newPrompt = (t = "", m = "") => 
  Object.assign(Prompt.create(),
    {"title": t, "message": m});

const addButton = (p, b) => {
  p.addButton(b);
  return p;
};

// Takes a title and list of button names
// Returns a prompt with title and list of buttons
const buttonPrompt = (t, buttons) =>
  buttons.reduce(addButton, newPrompt(t));

// p = Prompt
// c = ["funcName", [arguments]]
const addControl = (p, c) => {
  const func = c[0], args = c[1];
  p[func](...args);
  return p;
};

// Define a prompt in a object
// {
//   "title": "",
//   "message": "",
//   "controls": [
//     ["funcName", [arguments]],
//     ["funcName", [arguments]]
//   ]
// }
const customPrompt = p => 
  p.controls.reduce(addControl,
    newPrompt(p.title, p.message));

/***************************
 * General Utility Methods *
 ***************************
 */

const splitLines = s => s.split(/[\r\n]/);
const joinLines = xs => xs.join("\n");

// clamp a number between a min and max (inclusive)
const clamp = (n, min, max) => 
  Math.min(Math.max(n, min), max);

script

// Editor - Go to Line

(() => {

  const p = customPrompt({
    title: "Go to Line",
    controls: [
      ["addTextField", 
        ["ln", "Line Number:", "", 
        {"keyboard":"numberPad",
        "wantsFocus": true}]],
      ["addButton", ["Go"]]
    ]});
  
  if (p.show()){
    const 
      lines = splitLines(draft.content),
      lineCount = lines.length,
      inputNum = parseInt(p.fieldValues["ln"]),
      lineNum = clamp(inputNum, 1, lineCount),
      pos = (lineNum > 1)
        ? joinLines(lines.slice(0,lineNum-1)).length + 1
        : 0;
    editor.setSelectedRange(pos,0);
    editor.activate();
  }

})();

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