@atlaskit/editor-common/dist/esm/paste/md-plugins/newline-md-plugin.js

A package that contains common classes and components for editor and renderer

// File has been copied to packages/editor/editor-plugin-ai/src/provider/markdown-transformer/md/newline-md-plugin.ts
// If changes are made to this file, please make the same update in the linked file.

// ED-15363: modified version of the original newline plugin
// https://github.com/markdown-it/markdown-it/blob/master/lib/rules_inline/newline.js
// Ignored via go/ees005
// eslint-disable-next-line @typescript-eslint/no-explicit-any
var newline = function newline(state, silent) {
  var pos = state.pos;
  // ED-15363: unread variables
  // max,
  // ws,

  if (state.src.charCodeAt(pos) !== 0x0a /* \n */) {
    return false;
  }
  var pmax = state.pending.length - 1;
  // ED-15363: unread variable
  // max = state.posMax;

  // '  \n' -> hardbreak
  // Lookup in pending chars is bad practice! Don't copy to other rules!
  // Pending string is stored in concat mode, indexed lookups will cause
  // convertion to flat mode.
  if (!silent) {
    if (pmax >= 0 && state.pending.charCodeAt(pmax) === 0x20) {
      if (pmax >= 1 && state.pending.charCodeAt(pmax - 1) === 0x20) {
        // ED-15363: We commented out this logic to preserve trailing whitespaces
        // for each line of text when pasting plain text

        // // Find whitespaces tail of pending chars.
        // ws = pmax - 1;
        // while (ws >= 1 && state.pending.charCodeAt(ws - 1) === 0x20) {
        //   ws--;
        // }
        // state.pending = state.pending.slice(0, ws);
        state.push('hardbreak', 'br', 0);
      } else {
        state.pending = state.pending.slice(0, -1);
        state.push('softbreak', 'br', 0);
      }
    } else {
      state.push('softbreak', 'br', 0);
    }
  }
  pos++;

  // ED-15363: We commented out this logic from the original library to
  // preserve leading whitespaces for each line of text when pasting plain
  // text (to preserve whitespace-based indentation).

  // // skip heading spaces for next line
  // while (pos < max && isSpace(state.src.charCodeAt(pos))) {
  //   pos++;
  // }

  state.pos = pos;
  return true;
};

// Ignored via go/ees005
// eslint-disable-next-line @typescript-eslint/no-explicit-any
export default (function (md) {
  return md.inline.ruler.at('newline', newline);
});