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// Copyright 2009-2012 The MumbleKit Developers. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
#import <MumbleKit/MKTextMessage.h>
@interface MKTextMessage () <NSXMLParserDelegate> {
NSString *_rawStr;
NSMutableString *_plainStr;
NSString *_filteredStr;
NSMutableArray *_imagesArray;
NSMutableArray *_linksArray;
}
- (id) initWithString:(NSString *)str;
@end
@implementation MKTextMessage
- (id) initWithString:(NSString *)str {
if ((self = [super init])) {
_rawStr = [str retain];
_imagesArray = [[NSMutableArray alloc] init];
_linksArray = [[NSMutableArray alloc] init];
NSRange r = [_rawStr rangeOfString:@"<"];
BOOL possiblyHtml = r.location != NSNotFound;
if (possiblyHtml) {
_plainStr = [[NSMutableString alloc] init];
NSXMLParser *xmlParser = [[NSXMLParser alloc] initWithData:[[NSString stringWithFormat:@"<doc>%@</doc>", _rawStr] dataUsingEncoding:NSUTF8StringEncoding]];
[xmlParser setDelegate:self];
[xmlParser parse];
[xmlParser release];
// Strip extra whitespace
NSMutableData *filtered = [[NSMutableData alloc] init];
NSCharacterSet *whitespaceNewlineSet = [NSCharacterSet whitespaceAndNewlineCharacterSet];
int i, len = [_plainStr length];
unichar lastc = 0;
for (i = 0; i < len; i++) {
unichar c = [_plainStr characterAtIndex:i];
if ([whitespaceNewlineSet characterIsMember:c]) {
if (lastc != c)
[filtered appendBytes:&c length:2];
} else {
[filtered appendBytes:&c length:2];
}
lastc = c;
}
[_plainStr release];
_plainStr = nil;
_filteredStr = [[NSString stringWithCharacters:[filtered bytes] length:[filtered length]/2] retain];
[filtered release];
}
}
return self;
}
- (void) dealloc {
[_rawStr release];
[_plainStr release];
[_imagesArray release];
[_linksArray release];
[super dealloc];
}
+ (MKTextMessage *) messageWithString:(NSString *)msg {
return [[[MKTextMessage alloc] initWithString:msg] autorelease];
}
+ (MKTextMessage *) messageWithPlainText:(NSString *)msg {
return [[[MKTextMessage alloc] initWithString:msg] autorelease];
}
+ (MKTextMessage *) messageWithHTML:(NSString *)msg {
return [[[MKTextMessage alloc] initWithString:msg] autorelease];
}
- (NSString *) plainTextString {
if (_filteredStr != nil) {
return _filteredStr;
}
return _rawStr;
}
- (NSString *) HTMLString {
return _rawStr;
}
- (NSArray *) embeddedLinks {
return _linksArray;
}
- (NSArray *) embeddedImages {
return _imagesArray;
}
#pragma mark - NSXMLParserDelegate
- (void) parser:(NSXMLParser *)parser didStartElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName attributes:(NSDictionary *)attributeDict {
if ([elementName isEqualToString:@"img"]) {
NSString *src = [attributeDict objectForKey:@"src"];
if ([src hasPrefix:@"data:"]) {
[_imagesArray addObject:src];
}
} else if ([elementName isEqualToString:@"a"]) {
NSString *href = [attributeDict objectForKey:@"href"];
[_linksArray addObject:href];
}
}
- (void) parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName {
if ([elementName isEqualToString:@"br"] || [elementName isEqualToString:@"p"])
[_plainStr appendString:@"\n"];
}
- (void) parser:(NSXMLParser *)parser foundCharacters:(NSString *)string {
[_plainStr appendString:string];
}
@end
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