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Getting source HTML from a WebView in Cocoa

Answer 1

A:

UIWebView lets you run arbitrary JavaScript:

[webview stringByEvaluatingJavaScriptFromString:@"document.getElementsByTagName('html')[0].innerHTML"]

Marcelo Cantos 2010-01-12 03:16:24

So does WebView. http://developer.apple.com/mac/library/documentation/Cocoa/Reference/WebKit/Classes/WebView_Class/

Peter Hosey 2010-01-12 03:48:13

If you want to use JavaScript in the `WebView` you're much better off getting a pointer to the the `WebView`'s `windowScriptObject` property, which returns a `WebScriptObject` which you can use to evaluate JavaScript. The iPhone SDK's UIWebView is very limited and requires the use of `-stringByEvaluatingJavaScriptFromString:` which is more of a hack than anything else. `WebView` on Mac OS X is much more powerful.

Rob Keniger 2010-01-12 04:23:09

Answer 2

+1 A:

You can ask for the WebView's -selectedDOMRange and you'll get a DOMRange object back. You can use this object to find out what is selected. DOMRange, like all WebKit DOM objects, is an Objective-C representation of a standard W3C DOMRange object, see DOMRange.h for what methods/properties it supports.

You can then replace the current selection using the -replaceSelectionWithMarkupString:, -replaceSelectionWithText: or -replaceSelectionWithNode: methods of WebView.

Rob Keniger 2010-01-12 04:18:27

I hate to ask something that probably has an answer obvious to everyone else, but if I wanted to replace the markup with <somemarkup> + the selected markup + </somemarkup>, how would I do that? Those all seem to indicate to me that the selected markup will be destroyed.

Jim C 2010-01-12 05:38:49

You need to use the `DOMRange` object that is passed back to you and use its methods/properties to inspect the content that is selected. An HTML document is not just a string, the DOM may have been modified dynamically so you must do the work to ensure that you are replacing the selected content with valid markup. WebKit defines the `-markupString` method of DOMRange, but unfortunately this will probably not give you what you need. You should probably construct a valid DOMNode structure and insert that, possibly with a different range to the one you received from the WebView.

Rob Keniger 2010-01-12 06:07:44

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Getting source HTML from a WebView in Cocoa

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