Re: NSTextView Copy-and-Paste Problem
Re: NSTextView Copy-and-Paste Problem
- Subject: Re: NSTextView Copy-and-Paste Problem
- From: Martin Wierschin <email@hidden>
- Date: Mon, 02 Mar 2015 13:43:50 -0800
> I’m having problems with text attributes getting mangled by copy-and-paste operations within the selfsame text view. Obviously text pasted in from outside the app would have an unpredictable set of attributes, but you’d think copying and pasting in the same text view would leave you with a consistent set of attributes.
…
> I’d like to know if this behavior is expected or a bug
I didn’t look long at your code, but from what I saw, the behavior is expected. You’re applying custom keys to the NSTextView/NSTextStorage that will not be serialized when copy-pasting.
By default when you select some text in NSTextView and trigger a copy action, the selected text will be vended on the pasteboard via some common data format (eg: HTML, RTF, DOCX, etc) so the content can be pasted into another application. Naturally these common data formats have no understanding of your custom attribute keys, and thus cannot encode them.
If you need to preserve you own custom attributes when copy-pasting within your app, you’ll need to override the copy-paste methods in your NSTextView subclass to add a custom pasteboard data type with higher priority.
~Martin
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