NSXMLElementAdditions.m

   1 /*
   2  * MacGDBp
   3  * Copyright (c) 2007 - 2011, Blue Static <http://www.bluestatic.org>
   4  *
   5  * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
   6  * General Public License as published by the Free Software Foundation; either version 2 of the
   7  * License, or (at your option) any later version.
   8  *
   9  * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
  10  * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  11  * General Public License for more details.
  12  *
  13  * You should have received a copy of the GNU General Public License along with this program; if not,
  14  * write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
  15  */
  16
  17 #import <Cocoa/Cocoa.h>
  18
  19 #import "AppDelegate.h"
  20
  21 @interface NSXMLElement (GDBpAdditions_Private)
  22 - (NSString*)internalName;
  23 - (NSString*)internalBase64DecodedValue;
  24 - (void)recursiveBase64DecodedValue:(NSMutableString*)stringBuilder
  25                               depth:(NSUInteger)depth;
  26 @end
  27
  28 @implementation NSXMLElement (GDBpAdditions)
  29
  30 /**
  31  * Returns whether or not this node has any children
  32  */
  33 - (BOOL)isLeaf
  34 {
  35   return ([[[self attributeForName:@"children"] stringValue] intValue] == 0);
  36 }
  37
  38 /**
  39  * Returns the "name" attribute.
  40  */
  41 - (NSString*)internalName
  42 {
  43   return [[self attributeForName:@"name"] stringValue];
  44 }
  45
  46 /**
  47  * Does the actual work of decoding base64.
  48  */
  49 - (NSString*)internalBase64DecodedValue
  50 {
  51   // The value of the node is base64 encoded.
  52   if ([[[self attributeForName:@"encoding"] stringValue] isEqualToString:@"base64"]) {
  53     NSData* data = [[self stringValue] dataUsingEncoding:NSASCIIStringEncoding];
  54     NSData* base64Data = [[NSData alloc] initWithBase64EncodedData:data options:0];
  55     if (base64Data) {
  56       return [[NSString alloc] initWithData:base64Data encoding:NSUTF8StringEncoding];
  57     } else {
  58       return @"<< Failed to base64-decode data >>";
  59     }
  60   }
  61
  62   // The value is just a normal string.
  63   return [self stringValue];
  64 }
  65
  66 /**
  67  * Returns the value of the property
  68  */
  69 - (NSString*)base64DecodedValue
  70 {
  71   if (![self isLeaf]) {
  72     // For non-leaf nodes, display the object structure by recursively printing
  73     // the base64-decoded values.
  74     NSMutableString* mutableString = [[NSMutableString alloc] initWithString:@"(\n"];
  75     [self recursiveBase64DecodedValue:mutableString depth:1];
  76     [mutableString appendString:@")"];
  77     return mutableString;
  78   }
  79
  80   return [self internalBase64DecodedValue];
  81 }
  82
  83 /**
  84  * Recursively builds a print_r()-style output by attaching the data to
  85  * |stringBuilder| with indent level specified by |depth|.
  86  */
  87 - (void)recursiveBase64DecodedValue:(NSMutableString*)stringBuilder
  88                               depth:(NSUInteger)depth
  89 {
  90   // Create the indention string for this level.
  91   NSString* indent = [@"" stringByPaddingToLength:depth withString:@"\t" startingAtIndex:0];
  92
  93   if ([self isLeaf]) {
  94     // If this is a leaf node, simply append the key=>value pair.
  95     [stringBuilder appendFormat:@"%@%@\t=>\t%@\n", indent, [self internalName], [self internalBase64DecodedValue]];
  96   } else {
  97     // If this node has children, increase the depth and recurse.
  98     [stringBuilder appendFormat:@"%@%@\t=>\t(\n", indent, [self internalName]];
  99     for (NSXMLElement* elm in [self children]) {
 100       [elm recursiveBase64DecodedValue:stringBuilder depth:depth + 1];
 101     }
 102     [stringBuilder appendFormat:@"%@)\n", indent];
 103   }
 104 }
 105
 106 @end