Javascript 文本编辑器基本功能
我正在尝试用 Javascript 编写自己的 WYSWG 文本编辑器，但我正在努力解决一个似乎相当基本的问题。
给定内容可编辑区域内的文本选择，例如管道“|”之间的文本这里：
|我想要的一些文本编辑或| select
我可以弄清楚我需要在这里做什么来基本上移动结束范围标签，以便我的选择包含在斜体范围中。但是，我需要考虑很多其他情况，例如如果我想删除跨度，在已经包含打开或关闭跨度的区域周围添加另一个跨度，考虑打开/关闭我周围的其他标签类型选择等。
是否有某个库可以为我提供此选择/替换逻辑？还是我要求太多了？使用网络上已有的众多编辑器之一会更好吗？
我真的不想使用最后一个选项，因为我发现的大多数选项看起来都非常重，因为我真的只想要一些自定义编辑功能。
I'm attempting to write my own WYSWG text editor in Javascript, but I'm struggling with what seems to be a rather basic problem.
Given a selection of text inside a contentEditable area such as what is between the pipes '|' here:
<span class="italic">Some text that |I would want</span> to edit or| select
I can figure out what I need to do here to essentially move the closing span tag so that my selection is included in the italic span. However, there are a plethora of other cases that I need to account for such as if I want to remove the span, add another span around an area that already contains an opening or closing span, account for opening/closing other tag types around my selection, etc.
Is there some library that exists anywhere that provides this selection/replace logic for me? Or am I asking too much? Would I be better off using one of the many editors already available on the web?
I would really like to not have to use the last option since most of the ones I've found seem extremely heavy weight since I really only want a few custom editing functions.
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查看 Rangy 及其模块
http://code.google.com/p/rangy/
http://code.google.com/p/rangy/#Modules
ContentEditable 是一个令人讨厌的野兽，在浏览器之间有许多怪癖。 Rangy 试图解决这个问题，但合作起来仍然很困难。我的项目有很多自定义规则，因此我们必须使用像 Rangy 这样的较低级别的库。与 jQuery 结合起来，它的功能非常强大。
Check out Rangy and its modules
http://code.google.com/p/rangy/
http://code.google.com/p/rangy/#Modules
ContentEditable is a nasty beast with many quirks between browsers. Rangy tries to solve that but it's still difficult to work with. My project has a lot of custom rules so we had to use a lower level library like Rangy. Combined with jQuery it is very powerful.