Source/VariableNode.m

   1 /*
   2  * MacGDBp
   3  * Copyright (c) 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 "VariableNode.h"
  18
  19 #include "NSXMLElementAdditions.h"
  20
  21 @implementation VariableNode {
  22   NSMutableArray* _children;
  23   NSString* _nodeValue;
  24 }
  25
  26 - (id)initWithXMLNode:(NSXMLElement*)node {
  27   if (self = [super init]) {
  28     _name       = [[[node attributeForName:@"name"] stringValue] copy];
  29     _fullName   = [[[node attributeForName:@"fullname"] stringValue] copy];
  30     _className  = [[[node attributeForName:@"classname"] stringValue] copy];
  31     _type       = [[[node attributeForName:@"type"] stringValue] copy];
  32     _nodeValue  = [[node base64DecodedValue] copy];
  33     _children   = [[NSMutableArray alloc] init];
  34     if ([node children]) {
  35       [self setChildrenFromXMLChildren:[node children]];
  36     }
  37     _childCount = [[[node attributeForName:@"numchildren"] stringValue] integerValue];
  38     _address    = [[[node attributeForName:@"address"] stringValue] copy];
  39   }
  40   return self;
  41 }
  42
  43 - (void)setChildrenFromXMLChildren:(NSArray*)children {
  44   [self willChangeValueForKey:@"children"];
  45
  46   [_children removeAllObjects];
  47
  48   for (NSXMLNode* child in children) {
  49     // Other child nodes may be the string value.
  50     if ([child isKindOfClass:[NSXMLElement class]]) {
  51       VariableNode* node = [[VariableNode alloc] initWithXMLNode:(NSXMLElement*)child];
  52       // Don't include the CLASSNAME property as that information is retrieved
  53       // elsewhere.
  54       if (![node.name isEqualToString:@"CLASSNAME"])
  55         [_children addObject:node];
  56     }
  57   }
  58
  59   [self didChangeValueForKey:@"children"];
  60 }
  61
  62 - (BOOL)isLeaf {
  63   return self.childCount == 0;
  64 }
  65
  66 - (NSString*)displayType {
  67   if (self.className != nil) {
  68     return [NSString stringWithFormat:@"%@ (%@)", self.className, self.type];
  69   }
  70   return self.type;
  71 }
  72
  73 - (NSString*)description {
  74   return [NSString stringWithFormat:@"<VariableNode %p : %@>", self, self.fullName];
  75 }
  76
  77 - (NSString*)value {
  78   if (!self.isLeaf) {
  79     if (self.childCount != self.children.count) {
  80       return @"…";
  81     }
  82     // For non-leaf nodes, display the object structure by recursively printing
  83     // the base64-decoded values.
  84     NSMutableString* mutableString = [[NSMutableString alloc] initWithString:@"(\n"];
  85     for (VariableNode* child in self.children) {
  86       [self recusivelyFormatNode:child appendTo:mutableString depth:1];
  87     }
  88     [mutableString appendString:@")"];
  89
  90     return mutableString;
  91   }
  92
  93   return _nodeValue;
  94 }
  95
  96 ////////////////////////////////////////////////////////////////////////////////
  97 #pragma mark Private
  98
  99 /**
 100  * Recursively builds a print_r()-style output by attaching the data to
 101  * |stringBuilder| with indent level specified by |depth|.
 102  */
 103 - (void)recusivelyFormatNode:(VariableNode*)node
 104                     appendTo:(NSMutableString*)stringBuilder
 105                        depth:(NSUInteger)depth
 106 {
 107   // Create the indention string for this level.
 108   NSString* indent = [@"" stringByPaddingToLength:depth withString:@"\t" startingAtIndex:0];
 109
 110   if (node.isLeaf) {
 111     // If this is a leaf node, simply append the key=>value pair.
 112     [stringBuilder appendFormat:@"%@%@\t=>\t%@\n", indent, node.name, node->_nodeValue];
 113   } else {
 114     // If this node has children, increase the depth and recurse.
 115     [stringBuilder appendFormat:@"%@%@\t=>\t(\n", indent, node.name];
 116     for (VariableNode* child in node.children) {
 117       [self recusivelyFormatNode:child appendTo:stringBuilder depth:depth + 1];
 118     }
 119     [stringBuilder appendFormat:@"%@)\n", indent];
 120   }
 121 }
 122
 123 @end