在ACE编辑器中重置撤消堆栈

Question

我想在ACE编辑器中重置撤消堆栈.行为应该是:

1. 我在编辑器中做了一些更改.
2. 调用一些魔术函数来重置撤消堆栈
3. 尝试撤消时,这是不可能的,因为撤消堆栈已重置.

我想这与UndoManagerACE有关,但我不知道如何在以下示例中使用它.

var editor = ace.edit("editor");
editor.setTheme("ace/theme/monokai");
editor.getSession().setMode("ace/mode/markdown");

setTimeout(function() { 
  editor.setValue("And now how can I reset the\nundo stack,so pressing\nCTRL+Z (or Command + Z) will *NOT*\ngo back to previous value?", -1);
}, 3000);

#editor {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  font-size: 25px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.1.9/ace.js"></script>
<div id="editor">This value will be changed in 3 seconds.</div>

我已经调查editor和editor.session原型找一些辅助功能,但没有成功.

Answer 1

是的,UndoManager是维护所有历史的班级.解决方案是使用空白/新创建的类初始化会话.

看看片段.

var editor = ace.edit("editor");
editor.setTheme("ace/theme/monokai");
editor.getSession().setMode("ace/mode/markdown");

setTimeout(function() {
  editor.setValue("And now how can I reset the\nundo stack,so pressing\nCTRL+Z (or Command + Z) will *NOT*\ngo back to previous value?", -1);
  editor.getSession().setUndoManager(new ace.UndoManager())
}, 3000);

#editor {
  position: absolute;
  top: 0;
  right: 0;
  bottom: 0;
  left: 0;
  font-size: 25px;
}

<script src="https://cdnjs.cloudflare.com/ajax/libs/ace/1.1.9/ace.js"></script>
<div id="editor">This value will be changed in 3 seconds.</div>

Answer 2

使用editor.session.setValue()或致电editor.session.getUndoManager().reset();请参阅https://github.com/ajaxorg/ace/blob/v1.1.9/lib/ace/edit_session.js#L279