Re: can't get DOMDocument from WebView
Re: can't get DOMDocument from WebView
- Subject: Re: can't get DOMDocument from WebView
- From: "James G. Speth" <email@hidden>
- Date: Fri, 19 May 2006 04:18:48 -0700
try this one...
WebView *webView = [[WebView alloc] init];
DOMDocument *document = [[webView windowScriptObject]
evaluateWebScript:@"document"];
there you go.. .one nice, fresh, empty DOMHTMLDocument to play with,
no waiting on runloops.
(evaluating the javascript for the document makes it take a different
code path, one that causes it to initialize the DOMDocument)
you can do [[document documentElement] outerHTML] and see that it
contains "<HTML><BODY></BODY></HTML>"
if you do [[[document documentElement] firstChild]
setInnerHTML:myStringOfHTML] it'll parse the string and fill in the
body element with the appropriate nodes.
cheers!
Jim
On May 2, 2006, at 4:30 PM, Kenny Leung wrote:
Like I said in my original post, I don't actually want to display
the HTML. I want to do the relatively simpler task of parsing the
HTML into a DOM tree. I don't see where I can do that without
loading up a WebView. Any pointers would be much appreciated.
Thanks!
-Kenny
On May 2, 2006, at 4:19 PM, John Stiles wrote:
I think you're trivializing things a bit. Typical uses of an HTML
view involve asynchronous data loading which, naturally, is based
on the run loop.
On May 2, 2006, at 4:14 PM, Kenny Leung wrote:
Hmmm... It seems that there is no way to get the document to load
without returning to the run loop. This makes life difficult.
Funny how they designed the system to do something difficult but
then made it very difficult to do something very simple. Reminds
me of Java.
-Kenny
On May 2, 2006, at 2:20 PM, glenn andreas wrote:
On May 2, 2006, at 4:09 PM, Kenny Leung wrote:
Hi All.
I've been working all morning trying to get A DOM Document from
a WebView. Actually, I don't want to use a WebView. I just want
to gain access to the DOM parsing functionality. I would be
happy if I could get it without instantiating a WebView. Here
is the code I've been using, complete with temporary hacks:
self = [super init];
if ( self ) {
window = [[NSWindow alloc]
initWithContentRect:NSMakeRect(0, 0, 100, 100)
styleMask:NSBorderlessWindowMask backing:NSBackingStoreBuffered
defer:NO];
webView = [[[WebView alloc] initWithFrame:NSMakeRect(0,
0, 100, 100)] autorelease];
[window setContentView:webView];
[window makeKeyAndOrderFront:self];
frame = [webView mainFrame];
request = [NSURLRequest requestWithURL:[NSURL
fileURLWithPath:path]];
data = [NSData dataWithContentsOfFile:path];
// [frame loadRequest:request];
string = [[NSString alloc] initWithData:data
encoding:NSUTF8StringEncoding];
[frame loadHTMLString:string baseURL:[NSURL
URLWithString:@"http://www.quickceph.com";]];
// while ( ![frame dataSource] ) {
sleep(1);
// }
domDoc = [frame DOMDocument];
}
Everything checks out (not nil) until it gets to the last line
of asking for the DOMDocument. The DOMDocument is nil. Has
anyone else been successful at this?
Your "while (![frame dataSource]) sleep(1);" does not do what
you think it does (regardless of how it is commented or not).
You need to set a load delegate to the web view and implement
the webView:didFinishLoadForFrame: routine to actually be
notified when the frame is fully loaded (at which point you can
do whatever you want with the DOMDocument)
Glenn Andreas email@hidden
<http://www.gandreas.com/> wicked fun!
Widgetarium | the quickest path to widgets
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