GeneratePreviewForURL.m

/* This code is copyright Nathaniel Gray, licensed under the GPL v2.  
    See LICENSE.txt for details. */

#import <CoreFoundation/CoreFoundation.h>
#import <CoreServices/CoreServices.h>
#import <Foundation/Foundation.h>
#import <QuickLook/QuickLook.h>
#import "Common.h"


/* -----------------------------------------------------------------------------
 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)
{
#ifdef DEBUG
    NSDate *startDate = [NSDate date];
#endif
    n8log(@"Generating Preview");
    if (QLPreviewRequestIsCancelled(preview))
        return noErr;
    
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    
    // Invoke colorize.sh
    CFBundleRef bundle = QLPreviewRequestGetGeneratorBundle(preview);
    int status;
    NSData *output = colorizeURL(bundle, url, &status, 0);
    n8log(@"Generated preview html page in %.3f sec", 
          -[startDate timeIntervalSinceNow] );
    
    if (status != 0 || QLPreviewRequestIsCancelled(preview)) {
#ifndef DEBUG
        goto done;
#endif
    }
    // Now let WebKit do its thing
    NSString *textEncoding = [[NSUserDefaults standardUserDefaults] 
                              stringForKey:@"webkitTextEncoding"];
    if (!textEncoding || [textEncoding length] == 0)
        textEncoding = @"UTF-8";                
    CFDictionaryRef properties = 
            (CFDictionaryRef)[NSDictionary dictionaryWithObject:textEncoding 
                                                         forKey:(NSString *)kQLPreviewPropertyTextEncodingNameKey];
    QLPreviewRequestSetDataRepresentation(preview, (CFDataRef)output, 
                                          //kUTTypePlainText,
                                          kUTTypeHTML, 
                                          properties);
    
done:
    n8log(@"Finished preview in %.3f sec", -[startDate timeIntervalSinceNow] );
    [pool release];
    return noErr;
}

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