Renumber Lists

script

// Get selected text from draft and split it into lines
const text = draft.processTemplate('[[selection_only]]')
const lines = text.split('\n')

// Parameters
const lines_processed = []
const lines_final = []
const counters = []
let indent = '    '
let indent_length = 4
let previous_level = 0
let i = 0

// Check if at least one line begins with a tab
for (const line of lines) {
  // If yes, switch the entire action from spaces to tabs
  if (line.match(/^\t/)) {
    indent = '\t'
    indent_length = 1
    break
  }
}

// Process each list item
for (let line of lines) {
  // If it's a tabbed list, convert (accidental) indentation by spaces to tabs
  if (indent === '\t') {
    line = line.replace(/^ {4,}/, function (m) { return '\t'.repeat(m.length / 4) })
  }

  // Remove all spaces, tabs, and list markers to isolate the content
  const content = line.replace(/^\s*([A-Za-z0-9]+(\.|\)|:)|(\[|\()[A-Za-z0-9]+(\]|\))|-|\+|\*|•) */, '')

  // Extract only the indentation characters so we can calculate the level
  const indent_chars = line.replace(/([A-Za-z0-9]+(\.|\)|:)|(\[|\()[A-Za-z0-9]+(\]|\))|-|\+|\*|•).*/, '')
  const level = indent_chars.length / indent_length

  // If the current item is outdented compared to the previous one...
  if (level < previous_level) {
    // ... reset the previous level’s counter because that level was concluded
    // (in case there's another indented list on the same level later)
    counters[previous_level] = 0
  }

  // Set the current level's counter
  if (counters[level] > 0) {
    counters[level] = counters[level] + 1
  } else {
    counters[level] = 1
  }

  // Each list item separated by content, current level, and current count
  lines_processed[i] = [content, level, counters[level]]

  previous_level = level
  i++
}

// Reassemble the original lines array but with correct indentation and numbering
for (const line of lines_processed) {
  lines_final.push(indent.repeat(line[1]) + line[2] + '. ' + line[0])
}

// Put the text back together and save it to a template tag
const text_replacement = lines_final.join('\n')
draft.setTemplateTag('text_replacement', text_replacement)

insertText

[[text_replacement]]