Sources/MyDocument.m

   1 //
   2 //  MyDocument.m
   3 //  LeanCalc
   4 //
   5 //  Created by Marc Liyanage on 31.01.05.
   6 //  Copyright __MyCompanyName__ 2005 . All rights reserved.
   7 //
   8
   9
  10 /* todo
  11
  12 - num lock / esc clear expression
  13
  14 */
  15
  16
  17
  18 #import "MyDocument.h"
  19
  20 @implementation MyDocument
  21
  22 - (id)init {
  23     self = [super init];
  24     if (!self) return nil;
  25         calculations = [[NSMutableArray alloc] init];
  26         return self;
  27 }
  28
  29
  30 - (void)dealloc {
  31         [calculations release];
  32 }
  33
  34
  35 - (void)awakeFromNib {
  36
  37         if (![self fileName]) {
  38                 [arrayController add:self];
  39         }
  40
  41         [arrayController setSelectionIndex:[calculations count] - 1];
  42 }
  43
  44
  45 - (IBAction)commit:(id)sender {
  46
  47         if (![[sender stringValue] length]) return;
  48
  49         if (![self lastItemIsSelected] && [[calculations lastObject] expressionIsEmpty]) {
  50                 [arrayController setSelectedObjects:[NSArray arrayWithObject:[calculations lastObject]]];
  51                 return;
  52         }
  53         [self addItem];
  54 }
  55
  56
  57
  58 - (BOOL)lastItemIsSelected {
  59
  60         id lastObject = [calculations lastObject];
  61         id selectedObject = [[arrayController selectedObjects] objectAtIndex:0];
  62
  63         return selectedObject == lastObject;
  64 }
  65
  66
  67 - (void)addItem {
  68
  69         [arrayController add:self];
  70         int count = [calculations count];
  71         id last = [calculations objectAtIndex:count - 1];
  72         id secondtolast = [calculations objectAtIndex:count - 2];
  73         [secondtolast setValue:last forKey:@"next"];
  74
  75 }
  76
  77
  78 - (void)insertPrevious:(NSNumber *)sender {
  79
  80         int index = [sender intValue];
  81         if ([calculations count] <= index) return;
  82
  83         NSString *value = [[calculations objectAtIndex:[calculations count] - index - 1] valueForKey:@"result"];
  84         [[expressionField currentEditor] insertText:value];
  85 }
  86
  87
  88 - (NSArray *)control:(NSControl *)control textView:(NSTextView *)textView completions:(NSArray *)words forPartialWordRange:(NSRange)charRange indexOfSelectedItem:(int *)index {
  89
  90         NSString *partialWord = [[textView string] substringWithRange:charRange];
  91         NSArray *completions = [[[NSApplication sharedApplication] delegate] completionsForPartialWord:partialWord];
  92
  93         return completions;
  94 }
  95
  96
  97
  98 - (NSString *)windowNibName {
  99     return @"MyDocument";
 100 }
 101
 102
 103 - (void)windowControllerDidLoadNib:(NSWindowController *) aController {
 104     [super windowControllerDidLoadNib:aController];
 105 }
 106
 107
 108 - (NSData *)dataRepresentationOfType:(NSString *)aType {
 109         NSMutableData *data = [[[NSMutableData alloc] init] autorelease];
 110         NSKeyedArchiver *archiver = [[[NSKeyedArchiver alloc] initForWritingWithMutableData:data] autorelease];
 111         [archiver setOutputFormat:NSPropertyListXMLFormat_v1_0];
 112         [archiver encodeObject:calculations forKey:@"calculations"];
 113         [archiver finishEncoding];
 114         return data;
 115 }
 116
 117
 118 - (BOOL)loadDataRepresentation:(NSData *)data ofType:(NSString *)aType {
 119         NSKeyedUnarchiver *unarchiver = [[[NSKeyedUnarchiver alloc] initForReadingWithData:data] autorelease];
 120         [self setValue:[unarchiver decodeObjectForKey:@"calculations"] forKey:@"calculations"];
 121         [unarchiver finishDecoding];
 122     return YES;
 123 }
 124
 125 @end