Re: WebView find panel/bar implementation
Re: WebView find panel/bar implementation
- Subject: Re: WebView find panel/bar implementation
- From: "email@hidden" <email@hidden>
- Date: Tue, 02 Apr 2013 20:49:34 +0100
On 2 Apr 2013, at 17:13, Mike Abdullah <email@hidden> wrote:
>
> On 2 Apr 2013, at 12:43, email@hidden wrote:
>
>> I provide some app documentation in both RTF and MarkDown and switch in an NSTextView or WebView for display as required.
>>
>> But I don't see much in way of integrating NSTextFinder and WebView. The NSTextFinderClient protocol is quite extensive, which might explain why.
>>
>> Does anyone have any further insight into this?
>
> The problem is that Cocoa's Find Bar provides a whole raft of its own functionality, not just a UI. It requires you to feed it a string, which it will then search itself. There's no way (that I've come across) to have it ask you to perform a search on its behalf.
>
> I believe the reason for this is that the Find Bar actually supports some pretty complex, regular-expression-based searches, such as finding the URLs in a given piece of text.
>
> WebKit does supply a decent bit of search functionality as it happens. It's kinda hidden though — look up the WebDocumentSearching protocol!
Yes. A single method, -searchFor:direction:caseSensitive:wrap:
>
> To make use of the find bar, I think you'd have to:
>
> A) Walk the DOM for text nodes to feed into NSTextFinder. Make sure to handle whitespace the same way as WebKit renders it
> B) Implement looking up a bit of such text from a given index. Likely some sort of cache is needed to avoid walking the entire DOM every time for this
> C) Watch for the DOM being modified as a cue to update the find system
After posting I found https://github.com/Kapeli/HighlightedWebView which takes this approach.
This could be paired with a custom find bar view to provide a decent solution.
>
> Also, file a radar asking for WebViews to support the Find Bar. Mine's getting lonely!
Your radar has a sibling @ 13558923
Thanks
Jonathan
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