/*
* Adium is the legal property of its developers, whose names are listed in the copyright file included
* with this source distribution.
*
* This program 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 2 of the License,
* or (at your option) any later version.
*
* This program 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,
* write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
*/
#import "AIAutoLinkingPlugin.h"
#import <Adium/AIContentControllerProtocol.h>
#import <AutoHyperlinks/AutoHyperlinks.h>
/*!
* @class AIAutoLinkingPlugin
* @brief Filter component ta automatically create links within attributed strings as appropriate
*
* The bulk of this component's work is accomplished by SHHyperlinkScanner
*/
@implementation AIAutoLinkingPlugin
/*!
* @brief Install
*/
- (void)installPlugin
{
[adium.contentController registerContentFilter:self ofType:AIFilterDisplay direction:AIFilterIncoming];
[adium.contentController registerContentFilter:self ofType:AIFilterMessageDisplay direction:AIFilterIncoming];
[adium.contentController registerContentFilter:self ofType:AIFilterMessageDisplay direction:AIFilterOutgoing];
}
- (void)uninstallPlugin
{
[adium.contentController unregisterContentFilter:self];
}
/*!
* @brief Filter an attributed string to add links as appropriate
*/
- (NSAttributedString *)filterAttributedString:(NSAttributedString *)inAttributedString context:(id)context
{
if(!inAttributedString || ![inAttributedString length]) return inAttributedString;
NSMutableAttributedString *replacementMessage = [inAttributedString mutableCopy];
NSRange linkRange = NSMakeRange(0,0);
NSUInteger stringLength = [replacementMessage length];
if([AHHyperlinkScanner isStringValidURI:[replacementMessage string] usingStrict:YES fromIndex:nil withStatus:nil]){
NSString *linkString = (NSString *)CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault,
(CFStringRef)[replacementMessage string],
(CFStringRef)@"#%",
NULL,
kCFStringEncodingUTF8);
NSURL *linkURL = [NSURL URLWithString:linkString];
if(nil != linkURL) {
[replacementMessage addAttribute:NSLinkAttributeName
value:linkURL
range:NSMakeRange(0, [replacementMessage length])];
}
[linkString release];
}
for (NSInteger i = 0; i < stringLength; i += linkRange.length) {
if (![replacementMessage attribute:NSLinkAttributeName atIndex:i longestEffectiveRange:&linkRange inRange:NSMakeRange(i, stringLength - i)]) {
/* If there's no link at this index already, process it via the hyperlinkScanner to see if there should be one.
* We don't process existing links because (a) it would be duplicative effort and (b) we might mess up a link which had
* a linkable item within its text, such as "Check out the new story at adiumx.com" linked to an adiumx.com page.
*/
NSAttributedString *replacementPart = [[AHHyperlinkScanner hyperlinkScannerWithAttributedString:[inAttributedString attributedSubstringFromRange:linkRange]] linkifiedString];
[replacementMessage replaceCharactersInRange:linkRange
withAttributedString:replacementPart];
stringLength -= linkRange.length;
linkRange.length = [replacementPart length];
stringLength += linkRange.length;
}
}
return [replacementMessage autorelease];
}
/*!
* @brief Filter priority
*
* Auto linking overrides other potential filters; do it first
*/
- (CGFloat)filterPriority
{
return HIGHEST_FILTER_PRIORITY;
}
@end
