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//
// NSStringHTMLEntities.m
// HTMLTranslator
//
// Created by Uli Kusterer on Thu Aug 12 2004.
// Copyright (c) 2004 Uli Kusterer.
//
// This software is provided 'as-is', without any express or implied
// warranty. In no event will the authors be held liable for any damages
// arising from the use of this software.
//
// Permission is granted to anyone to use this software for any purpose,
// including commercial applications, and to alter it and redistribute it
// freely, subject to the following restrictions:
//
// 1. The origin of this software must not be misrepresented; you must not
// claim that you wrote the original software. If you use this software
// in a product, an acknowledgment in the product documentation would be
// appreciated but is not required.
//
// 2. Altered source versions must be plainly marked as such, and must not be
// misrepresented as being the original software.
//
// 3. This notice may not be removed or altered from any source
// distribution.
//

#import "NSString+HTMLEntities.h"


@implementation NSString (UKHTMLEntities)

-(NSString*) stringByInsertingHTMLEntities
{
    return [self stringByInsertingHTMLEntitiesAndLineBreaks: YES];
}

-(NSString*) stringByInsertingHTMLEntitiesAndLineBreaks: (BOOL)br
{
unsigned count = [self length];
NSMutableString* actualText = [NSMutableString stringWithCapacity: count];
unsigned x = 0;
static NSDictionary* entitiesTable = nil;

if( !entitiesTable )
{
NSString* dictPath = [[NSBundle mainBundle] pathForResource: @"HTMLEntities" ofType: @"plist"];
entitiesTable = [[NSDictionary dictionaryWithContentsOfFile: dictPath] retain];
}

for( x = 0; x < count; x++ )
{
unichar theCh = [self characterAtIndex: x];
NSString* theChStr = [NSString stringWithCharacters: &theCh length: 1];

if( theCh < 128 && theCh != '&' && theCh != '<' // Valid ASCII range, and none of the specially escaped ones? Just take it along:
&& theCh != '>' && theCh != '"' )
        {
            if( br && (theCh == '\r' || theCh == '\n') )
                [actualText appendString: @"<br>\n"];
            else
                [actualText appendString: theChStr];
        }
else
{
NSString* finalChStr = [entitiesTable objectForKey: theChStr];
if( !finalChStr )
[actualText appendString: [NSString stringWithFormat: @"&#%d;", theCh]];
else
[actualText appendString: finalChStr];
}
}

return actualText;
}

@end
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