ace.js

(function() {
  var Range, applyToShareJS;
  Range = require("ace/range").Range;
  applyToShareJS = function(editorDoc, delta, doc) {
    var getStartOffsetPosition, pos, text;
    getStartOffsetPosition = function(range) {
      var i, line, lines, offset, _len;
      lines = editorDoc.getLines(0, range.start.row);
      offset = 0;
      for (i = 0, _len = lines.length; i < _len; i++) {
        line = lines[i];
        offset += i < range.start.row ? line.length : range.start.column;
      }
      return offset + range.start.row;
    };
    pos = getStartOffsetPosition(delta.range);
    switch (delta.action) {
      case 'insertText':
        doc.insert(pos, delta.text);
        break;
      case 'removeText':
        doc.del(pos, delta.text.length);
        break;
      case 'insertLines':
        text = delta.lines.join('\n') + '\n';
        doc.insert(pos, text);
        break;
      case 'removeLines':
        text = delta.lines.join('\n') + '\n';
        doc.del(pos, text.length);
        break;
      default:
        throw new Error("unknown action: " + delta.action);
    }
  };
  window.sharejs.extendDoc('attach_ace', function(editor, keepEditorContents) {
    var check, doc, docListener, editorDoc, editorListener, offsetToPos, suppress;
    if (!this.provides['text']) {
      throw new Error('Only text documents can be attached to ace');
    }
    doc = this;
    editorDoc = editor.getSession().getDocument();
    editorDoc.setNewLineMode('unix');
    check = function() {
      return window.setTimeout(function() {
        var editorText, otText;
        editorText = editorDoc.getValue();
        otText = doc.getText();
        if (editorText !== otText) {
          console.error("Text does not match!");
          console.error("editor: " + editorText);
          return console.error("ot:     " + otText);
        }
      }, 0);
    };
    if (keepEditorContents) {
      doc.del(0, doc.getText().length);
      doc.insert(0, editorDoc.getValue());
    } else {
      editorDoc.setValue(doc.getText());
    }
    check();
    suppress = false;
    editorListener = function(change) {
      if (suppress) {
        return;
      }
      applyToShareJS(editorDoc, change.data, doc);
      return check();
    };
    editorDoc.on('change', editorListener);
    docListener = function(op) {
      suppress = true;
      applyToDoc(editorDoc, op);
      suppress = false;
      return check();
    };
    offsetToPos = function(offset) {
      var line, lines, row, _len;
      lines = editorDoc.getAllLines();
      row = 0;
      for (row = 0, _len = lines.length; row < _len; row++) {
        line = lines[row];
        if (offset <= line.length) {
          break;
        }
        offset -= lines[row].length + 1;
      }
      return {
        row: row,
        column: offset
      };
    };
    doc.on('insert', function(pos, text) {
      suppress = true;
      editorDoc.insert(offsetToPos(pos), text);
      suppress = false;
      return check();
    });
    doc.on('delete', function(pos, text) {
      var range;
      suppress = true;
      range = Range.fromPoints(offsetToPos(pos), offsetToPos(pos + text.length));
      editorDoc.remove(range);
      suppress = false;
      return check();
    });
    doc.detach_ace = function() {
      doc.removeListener('remoteop', docListener);
      editorDoc.removeListener('change', editorListener);
      return delete doc.detach_ace;
    };
  });
}).call(this);