/*

     File: Step.m

 Abstract: A model object to represent a code step in a presentation.

 The class conforms to the NSCoding, NSPasteboardReading, and NSPasteboardWriting protocols so that instances can be used with archives and written to and read from a pasteboard.

  Version: 1.1

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 */

#import "Step.h"

@implementation Step

@synthesize tableSummary, body, tooltip, undoManager;

#pragma mark -

#pragma mark Archiving

static NSString *BodyKey = @"Body";

static NSString *ToolTipKey = @"ToolTip";

static NSString *TableSummaryKey = @"TableSummary";

- (id)initWithCoder:(NSCoder *)coder {

    if (self = [super init]) {

        body = [[coder decodeObjectForKey:BodyKey] retain];    

        tooltip = [[coder decodeObjectForKey:ToolTipKey] retain];    

        tableSummary = [[coder decodeObjectForKey:TableSummaryKey] retain];    

    }

    return self;

}

- (void)encodeWithCoder:(NSCoder *)encoder {

    [encoder encodeObject:body forKey:BodyKey];

    [encoder encodeObject:tooltip forKey:ToolTipKey];

    [encoder encodeObject:tableSummary forKey:TableSummaryKey];

}

#pragma mark -

#pragma mark Pasteboard support

NSString *StepUTI = @"com.yourcompany.demomonkey.step";

- (NSArray *)writableTypesForPasteboard:(NSPasteboard *)pasteboard {

    static NSArray *writableTypes = nil;

    if (!writableTypes) {

        writableTypes = [[NSArray alloc] initWithObjects:StepUTI, NSPasteboardTypeString, nil];

    }

    return writableTypes;

}

- (id)pasteboardPropertyListForType:(NSString *)type {

    if ([type isEqualToString:StepUTI]) {

        return [NSKeyedArchiver archivedDataWithRootObject:self];

    }

    if ([type isEqualToString:NSPasteboardTypeString]) {

        return [self description];

    }

    return nil;

}

+ (NSArray *)readableTypesForPasteboard:(NSPasteboard *)pasteboard {

    static NSArray *readableTypes = nil;

    if (!readableTypes) {

        readableTypes = [[NSArray alloc] initWithObjects:StepUTI, NSPasteboardTypeString, nil];

    }

    return readableTypes;

}

+ (NSPasteboardReadingOptions)readingOptionsForType:(NSString *)type pasteboard:(NSPasteboard *)pboard {

    if ([type isEqualToString:StepUTI]) {

        /*

         This means you don't need to implement code for this type in initWithPasteboardPropertyList:ofType: -- initWithCoder: is invoked instead.

         */

        return NSPasteboardReadingAsKeyedArchive;

    }

    if ([type isEqualToString:NSPasteboardTypeString]) {

        return NSPasteboardReadingAsString;

    }

    return 0;

}

- (id)initWithPasteboardPropertyList:(id)propertyList ofType:(NSString *)type {

    self = [self init];

    if (self) {

        if ([type isEqualToString:NSPasteboardTypeString]) {

            [body release];

            body = [propertyList copy];

        } else {

            [self release];

            return nil;

        }

    }

    return self;

}

- (NSString *)description {

    NSString *description = body;

    if (!description) {

        description = @"No body";

    }

    return description;

}

#pragma mark -

#pragma mark Set accessors

- (void)setBody:(NSString *)newBody {

    if (body != newBody) {

        [undoManager registerUndoWithTarget:self selector:@selector(setBody:) object:body];

        [body release];

        body = [newBody retain];

    }

}

- (void)setTableSummary:(NSString *)newTableSummary {

    if (tableSummary != newTableSummary) {

        [undoManager registerUndoWithTarget:self selector:@selector(setTableSummary:) object:tableSummary];

        [tableSummary release];

        tableSummary = [newTableSummary retain];

    }

}

- (void)setTooltip:(NSString *)newTooltip {

    if (tooltip != newTooltip) {

        [undoManager registerUndoWithTarget:self selector:@selector(setTooltip:) object:tooltip];

        [tooltip release];

        tooltip = [newTooltip retain];

    }

}

#pragma mark -

#pragma mark Object lifecycle

-(id)init {

    self = [super init];

    if (self) {    

        body = @"";

        tooltip = @"";

        tableSummary = @"New Step";

    }

    return self;

}

- (void)dealloc {

    [body release];

    [tooltip release];

    [tableSummary release];

    [super dealloc];

}

@end