GeneratePreviewForURL.m

//	  QuickCHM a CHM Quicklook plgin for Mac OS X 10.5
//
//    Copyright (C) 2007  Qian Qian (qiqian82@gmail.com)
//
//    QuickCHM is free software: you can redistribute it and/or modify
//    it under the terms of the GNU General Public License as published by
//    the Free Software Foundation, either version 3 of the License, or
//    (at your option) any later version.
//
//    QuickCHM is distributed in the hope that it will be useful,
//    but WITHOUT ANY WARRANTY; without even the implied warranty of
//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//    GNU General Public License for more details.
//
//    You should have received a copy of the GNU General Public License
//    along with this program.  If not, see <http://www.gnu.org/licenses/>.

#import <CoreFoundation/CoreFoundation.h>
#import <CoreFoundation/CFPlugInCOM.h>
#import <CoreServices/CoreServices.h>
#import <QuickLook/QuickLook.h>

#import <libxml/parser.h>

#import "CHMDocument.h"
#import "CHMContainer.h"
#import "CHMURLProtocol.h"
#import "CHMTableOfContents.h"
#import "CHMTopic.h"
#import "QuickChmPageAdaptor.h"

#pragma mark Generate preview

/* -----------------------------------------------------------------------------
   Generate a preview for file

   This function's job is to create preview for designated file
   ----------------------------------------------------------------------------- */

OSStatus GeneratePreviewForURL(void *thisInterface, QLPreviewRequestRef preview, CFURLRef url, CFStringRef contentTypeUTI, CFDictionaryRef options)
{
	xmlInitParser();
	LIBXML_TEST_VERSION;
	
	BOOL success = [NSURLProtocol registerClass:[CHMURLProtocol class]];
	NSLog(@"NSURLProtocol registration %@", success ? @"SUCCESS" : @"FAIL");
	
	NSAutoreleasePool* pool = [[NSAutoreleasePool alloc] init];
	CHMDocument *doc = [[CHMDocument alloc] init];
	
	if ([doc readFromURL:(NSURL*)url ofType:nil error:nil]) {
		NSURL *homeUrl = [doc currentLocation];
		// Get the main page data
		NSData *data = [doc urlData:homeUrl];	
		// Parse and replace hyper link
		NSMutableDictionary *props=[[[NSMutableDictionary alloc] init] autorelease];
		CFDataRef newData = adaptPage(data, doc->_container, homeUrl, &props);
		
		QLPreviewRequestSetDataRepresentation(preview, newData, kUTTypeHTML, (CFDictionaryRef)props);
	}
	[pool release];
	
	xmlCleanupParser();
	
    return noErr;
}

void CancelPreviewGeneration(void* thisInterface, QLPreviewRequestRef preview)
{
	// implement only if supported
}