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         if (![self fileName]) {
  38                 [arrayController add:self];
  39         }
  40         [arrayController setSelectionIndex:[calculations count] - 1];
  41 }
  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         id lastObject = [calculations lastObject];
  60         id selectedObject = [[arrayController selectedObjects] objectAtIndex:0];
  61         return selectedObject == lastObject;
  62 }
  63
  64
  65 - (void)addItem {
  66         Calculation *newcalc = [[[Calculation alloc] init] autorelease];
  67         [arrayController addObject:newcalc];
  68         int count = [calculations count];
  69         id secondtolast = [calculations objectAtIndex:count - 2];
  70         [secondtolast setValue:newcalc forKey:@"next"];
  71 }
  72
  73
  74 - (void)insertPrevious:(NSNumber *)sender {
  75         int index = [sender intValue];
  76         if ([calculations count] <= index) return;
  77
  78         NSString *value = [[calculations objectAtIndex:[calculations count] - index - 1] valueForKey:@"result"];
  79         [[expressionField currentEditor] insertText:value];
  80 }
  81
  82
  83 - (NSArray *)control:(NSControl *)control textView:(NSTextView *)textView completions:(NSArray *)words forPartialWordRange:(NSRange)charRange indexOfSelectedItem:(int *)index {
  84
  85         NSString *partialWord = [[textView string] substringWithRange:charRange];
  86         NSArray *completions = [[[NSApplication sharedApplication] delegate] completionsForPartialWord:partialWord];
  87
  88         return completions;
  89 }
  90
  91
  92 // enable copy: menu command only when a previous result is selected
  93 - (BOOL)validateMenuItem:(NSMenuItem *)item {
  94         if ([item action] != @selector(copy:)) return YES;
  95         id selectedObject = [[arrayController selectedObjects] objectAtIndex:0];
  96         return selectedObject && ![self lastItemIsSelected] && ![selectedObject expressionIsEmpty];
  97 }
  98
  99 /*
 100 - (BOOL)textView:(NSTextView *)aTextView doCommandBySelector:(SEL)aSelector {
 101         NSLog(@"text view by selector %d", aSelector);
 102         return NO;
 103 }
 104 */
 105
 106
 107 - (IBAction)copy:(id)sender {
 108         NSPasteboard *pboard = [NSPasteboard generalPasteboard];
 109         [pboard declareTypes:[NSArray arrayWithObject:NSStringPboardType] owner:nil];
 110         id selectedObject = [[arrayController selectedObjects] objectAtIndex:0];
 111         [pboard setString:[selectedObject result] forType:NSStringPboardType];
 112 }
 113
 114
 115 - (NSString *)windowNibName {
 116     return @"MyDocument";
 117 }
 118
 119
 120 - (void)windowControllerDidLoadNib:(NSWindowController *)aController {
 121         NSWindow *win = [aController window];
 122         [win performSelector:@selector(makeFirstResponder:) withObject:expressionField afterDelay:0.0];
 123     [super windowControllerDidLoadNib:aController];
 124 }
 125
 126
 127 - (NSData *)dataRepresentationOfType:(NSString *)aType {
 128         NSMutableData *data = [[[NSMutableData alloc] init] autorelease];
 129         NSKeyedArchiver *archiver = [[[NSKeyedArchiver alloc] initForWritingWithMutableData:data] autorelease];
 130         [archiver setOutputFormat:NSPropertyListXMLFormat_v1_0];
 131         [archiver encodeObject:calculations forKey:@"calculations"];
 132         [archiver finishEncoding];
 133         return data;
 134 }
 135
 136
 137 - (BOOL)loadDataRepresentation:(NSData *)data ofType:(NSString *)aType {
 138         NSKeyedUnarchiver *unarchiver = [[[NSKeyedUnarchiver alloc] initForReadingWithData:data] autorelease];
 139         [self setValue:[unarchiver decodeObjectForKey:@"calculations"] forKey:@"calculations"];
 140         [unarchiver finishDecoding];
 141     return YES;
 142 }
 143
 144 @end