--- /dev/null
+/*
+ Copyright (C) 2000-2005 SKYRIX Software AG
+
+ This file is part of SOPE.
+
+ SOPE is free software; you can redistribute it and/or modify it under
+ the terms of the GNU Lesser General Public License as published by the
+ Free Software Foundation; either version 2, or (at your option) any
+ later version.
+
+ SOPE 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 Lesser General Public
+ License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with SOPE; see the file COPYING. If not, write to the
+ Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA.
+*/
+
+#ifndef __NGObjWeb_NSString_JavaScriptEscaping_H__
+#define __NGObjWeb_NSString_JavaScriptEscaping_H__
+
+#import <Foundation/NSString.h>
+
+/*
+ Escape a string according to JavaScript escaping rules.
+
+ For more information about JS escaping:
+ http://www.web-developer-india.com/web/jscript/ch02_05.html
+*/
+
+@interface NSString(JavaScriptEscaping)
+
+- (NSString *)stringByApplyingJavaScriptEscaping;
+
+@end
+
+#endif /* __NGObjWeb_NSString_JavaScriptEscaping_H__ */
--- /dev/null
+/*
+ Copyright (C) 2000-2005 SKYRIX Software AG
+
+ This file is part of SOPE.
+
+ SOPE is free software; you can redistribute it and/or modify it under
+ the terms of the GNU Lesser General Public License as published by the
+ Free Software Foundation; either version 2, or (at your option) any
+ later version.
+
+ SOPE 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 Lesser General Public
+ License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with SOPE; see the file COPYING. If not, write to the
+ Free Software Foundation, 59 Temple Place - Suite 330, Boston, MA
+ 02111-1307, USA.
+*/
+
+#include <NGObjWeb/NSString+JavaScriptEscaping.h>
+#include "common.h"
+
+@implementation NSString(JavascriptEscaping)
+
+static inline unichar HEX_NIBBLE(unichar v) {
+ return (v > 9) ? (v - 10 + 'a') : (v + '0');
+}
+
+- (NSString *)stringByApplyingJavaScriptEscaping {
+ /* Replaces \b, \f, \n, \r, \t, ', " by \-escaped sequences.
+ Replaces non-ASCII characters by either \xXX escape sequences,
+ when character is in ISOLatin1, or \uXXXX escape sequences.
+ Result string can be used safely as a Javascript string value.
+ */
+ NSString *javascriptEscapedString = self;
+ unsigned additionalCharCount = 0;
+ unsigned length = [self length];
+ int i, firstEscapedCharIndex = -1, lastEscapedCharIndex = length;
+
+ for(i = length - 1; i >= 0; i -=1) {
+ unichar aChar = [self characterAtIndex:i];
+
+ if (aChar > 255) {
+ additionalCharCount += 5; // \uXXXX
+ firstEscapedCharIndex = i;
+ }
+ else if (aChar > 127) {
+ additionalCharCount += 3; // \xXX
+ firstEscapedCharIndex = i;
+ }
+ else if (aChar == '\b' || aChar == '\f' || aChar == '\n' ||
+ aChar == '\r' ||
+ aChar == '\t' || aChar == '\'' || aChar == '"' || aChar == '\\') {
+ additionalCharCount += 1;
+ firstEscapedCharIndex = i;
+ }
+ if (lastEscapedCharIndex == length && additionalCharCount != 0)
+ lastEscapedCharIndex = i;
+ }
+
+ if (additionalCharCount > 0) {
+ unsigned newLength = length + additionalCharCount;
+ unichar *newChars = NSZoneMalloc(NSDefaultMallocZone(),
+ sizeof(unichar) * newLength);
+ unsigned offset = 0;
+
+ [self getCharacters:newChars range:NSMakeRange(0, firstEscapedCharIndex)];
+ for(i = firstEscapedCharIndex; i <= lastEscapedCharIndex; i += 1) {
+ unichar aChar = [self characterAtIndex:i];
+
+ if (aChar > 255) {
+ newChars[i + offset] = '\\';
+ newChars[i + offset + 1] = 'u';
+ newChars[i + offset + 2] = HEX_NIBBLE((aChar >> 12) & 0x0F);
+ newChars[i + offset + 3] = HEX_NIBBLE((aChar >> 8) & 0x0F);
+ newChars[i + offset + 4] = HEX_NIBBLE((aChar >> 4) & 0x0F);
+ newChars[i + offset + 5] = HEX_NIBBLE( aChar & 0x0F);
+ offset += 5;
+ }
+ else if (aChar > 127) {
+ newChars[i + offset] = '\\';
+ newChars[i + offset + 1] = 'x';
+ newChars[i + offset + 2] = HEX_NIBBLE((aChar >> 4) & 0x0F);
+ newChars[i + offset + 3] = HEX_NIBBLE( aChar & 0x0F);
+ offset += 3;
+ }
+ else if (aChar == '\b') {
+ newChars[i + offset] = '\\';
+ newChars[i + offset + 1] = 'b';
+ offset += 1;
+ }
+ else if (aChar == '\f') {
+ newChars[i + offset] = '\\';
+ newChars[i + offset + 1] = 'f';
+ offset += 1;
+ }
+ else if (aChar == '\n') {
+ newChars[i + offset] = '\\';
+ newChars[i + offset + 1] = 'n';
+ offset += 1;
+ }
+ else if (aChar == '\r') {
+ newChars[i + offset] = '\\';
+ newChars[i + offset + 1] = 'r';
+ offset += 1;
+ }
+ else if (aChar == '\t') {
+ newChars[i + offset] = '\\';
+ newChars[i + offset + 1] = 't';
+ offset += 1;
+ }
+ else if (aChar == '\'') {
+ newChars[i + offset] = '\\';
+ newChars[i + offset + 1] = '\'';
+ offset += 1;
+ }
+ else if (aChar == '"') {
+ newChars[i + offset] = '\\';
+ newChars[i + offset + 1] = '"';
+ offset += 1;
+ }
+ else if (aChar == '\\') {
+ newChars[i + offset] = '\\';
+ newChars[i + offset + 1] = '\\';
+ offset += 1;
+ }
+ else
+ newChars[i + offset] = aChar;
+ }
+ if (lastEscapedCharIndex < length)
+ [self getCharacters:(newChars + offset + lastEscapedCharIndex + 1)
+ range:NSMakeRange(lastEscapedCharIndex + 1,
+ length - lastEscapedCharIndex - 1)];
+ javascriptEscapedString = [NSString stringWithCharacters:newChars
+ length:newLength];
+ }
+
+ return javascriptEscapedString;
+}
+
+@end /* NSString(JavascriptEscaping) */
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