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         [super dealloc];
  33 }
  34
  35
  36 - (void)awakeFromNib {
  37
  38         if (![self fileName]) {
  39                 [arrayController add:self];
  40         }
  41
  42         [arrayController setSelectionIndex:[calculations count] - 1];
  43
  44 }
  45
  46
  47
  48 - (IBAction)commit:(id)sender {
  49
  50         if (![[sender stringValue] length]) return;
  51
  52         if (![self lastItemIsSelected] && [[calculations lastObject] expressionIsEmpty]) {
  53                 [arrayController setSelectedObjects:[NSArray arrayWithObject:[calculations lastObject]]];
  54                 return;
  55         }
  56         [self addItem];
  57 }
  58
  59
  60
  61 - (BOOL)lastItemIsSelected {
  62         id lastObject = [calculations lastObject];
  63         id selectedObject = [[arrayController selectedObjects] objectAtIndex:0];
  64         return selectedObject == lastObject;
  65 }
  66
  67
  68 - (void)addItem {
  69         Calculation *newcalc = [[[Calculation alloc] init] autorelease];
  70         [arrayController addObject:newcalc];
  71         int count = [calculations count];
  72         id secondtolast = [calculations objectAtIndex:count - 2];
  73         [secondtolast setValue:newcalc forKey:@"next"];
  74 }
  75
  76
  77 - (void)insertPrevious:(NSNumber *)sender {
  78         int index = [sender intValue];
  79         if ([calculations count] <= index) return;
  80
  81         NSString *value = [[calculations objectAtIndex:[calculations count] - index - 1] valueForKey:@"result"];
  82         [[expressionField currentEditor] insertText:value];
  83 }
  84
  85
  86 - (NSArray *)control:(NSControl *)control textView:(NSTextView *)textView completions:(NSArray *)words forPartialWordRange:(NSRange)charRange indexOfSelectedItem:(int *)index {
  87
  88         NSString *partialWord = [[textView string] substringWithRange:charRange];
  89         NSArray *completions = [[[NSApplication sharedApplication] delegate] completionsForPartialWord:partialWord];
  90
  91         return completions;
  92 }
  93
  94
  95 // enable copy: menu command only when a previous result is selected
  96 - (BOOL)validateMenuItem:(NSMenuItem *)item {
  97         if ([item action] != @selector(copy:)) return YES;
  98         id selectedObject = [[arrayController selectedObjects] objectAtIndex:0];
  99         return selectedObject && ![self lastItemIsSelected] && ![selectedObject expressionIsEmpty];
 100 }
 101
 102
 103 - (IBAction)copy:(id)sender {
 104         NSPasteboard *pboard = [NSPasteboard generalPasteboard];
 105         [pboard declareTypes:[NSArray arrayWithObject:NSStringPboardType] owner:nil];
 106         id selectedObject = [[arrayController selectedObjects] objectAtIndex:0];
 107         [pboard setString:[selectedObject result] forType:NSStringPboardType];
 108 }
 109
 110
 111
 112
 113 - (NSString *)windowNibName {
 114     return @"MyDocument";
 115 }
 116
 117
 118 - (void)windowControllerDidLoadNib:(NSWindowController *)aController {
 119         NSWindow *win = [aController window];
 120         [win performSelector:@selector(makeFirstResponder:) withObject:expressionField afterDelay:0.0];
 121     [super windowControllerDidLoadNib:aController];
 122 }
 123
 124
 125 - (NSData *)dataRepresentationOfType:(NSString *)aType {
 126         NSMutableData *data = [[[NSMutableData alloc] init] autorelease];
 127         NSKeyedArchiver *archiver = [[[NSKeyedArchiver alloc] initForWritingWithMutableData:data] autorelease];
 128         [archiver setOutputFormat:NSPropertyListXMLFormat_v1_0];
 129         [archiver encodeObject:calculations forKey:@"calculations"];
 130         [archiver finishEncoding];
 131         return data;
 132 }
 133
 134
 135 - (BOOL)loadDataRepresentation:(NSData *)data ofType:(NSString *)aType {
 136         NSKeyedUnarchiver *unarchiver = [[[NSKeyedUnarchiver alloc] initForReadingWithData:data] autorelease];
 137         [self setValue:[unarchiver decodeObjectForKey:@"calculations"] forKey:@"calculations"];
 138         [unarchiver finishDecoding];
 139     return YES;
 140 }
 141
 142 @end