/*
        MultiplePageView.m
        Copyright (c) 1995-2005 by Apple Computer, Inc., all rights reserved.
        Author: Ali Ozer

        View which holds all the pages together in the multiple-page case
*/
/*
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 derivative works or by other works in which the Apple Software may be incorporated.
 
 The Apple Software is provided by Apple on an "AS IS" basis.  APPLE MAKES NO WARRANTIES, 
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 USE AND OPERATION ALONE OR IN COMBINATION WITH YOUR PRODUCTS.
 
 IN NO EVENT SHALL APPLE BE LIABLE FOR ANY SPECIAL, INDIRECT, INCIDENTAL OR CONSEQUENTIAL 
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*/

#import <Cocoa/Cocoa.h>
#import "MultiplePageView.h"
#import "Document.h"	// For defaultTextPadding();

@implementation MultiplePageView

- (id)initWithFrame:(NSRect)rect {
    if ((self = [super initWithFrame:rect])) {
        numPages = 0;
        [self setLineColor:[NSColor lightGrayColor]];
        [self setMarginColor:[NSColor whiteColor]];
	/* This will set the frame to be whatever's appropriate... */
        [self setPrintInfo:[NSPrintInfo sharedPrintInfo]];
    }
    return self;
}

- (BOOL)isFlipped {
    return YES;
}

- (BOOL)isOpaque {
    return YES;
}

- (void)updateFrame {
    if ([self superview]) {
        NSRect rect = NSZeroRect;
        rect.size = [printInfo paperSize];
        rect.size.height = rect.size.height * numPages;
        if (numPages > 1) rect.size.height += [self pageSeparatorHeight] * (numPages - 1);
        rect.size = [self convertSize:rect.size toView:[self superview]];
        [self setFrame:rect];
    }
}

- (void)setPrintInfo:(NSPrintInfo *)anObject {
    if (printInfo != anObject) {
        [printInfo autorelease];
        printInfo = [anObject copyWithZone:[self zone]];
        [self updateFrame];
        [self setNeedsDisplay:YES];	/* Because the page size or margins might change (could optimize this) */
    }
}

- (NSPrintInfo *)printInfo {
    return printInfo;
}

- (void)setNumberOfPages:(unsigned)num {
    if (numPages != num) {
	NSRect oldFrame = [self frame];
        NSRect newFrame;
        numPages = num;
        [self updateFrame];
	newFrame = [self frame];
        if (newFrame.size.height > oldFrame.size.height) {
	    [self setNeedsDisplayInRect:NSMakeRect(oldFrame.origin.x, NSMaxY(oldFrame), oldFrame.size.width, NSMaxY(newFrame) - NSMaxY(oldFrame))];
        }
    }
}

- (unsigned)numberOfPages {
    return numPages;
}
    
- (float)pageSeparatorHeight {
    return 5.0;
}

- (void)dealloc {
    [printInfo release];
    [super dealloc];
}

- (NSSize)documentSizeInPage {
    NSSize paperSize = [printInfo paperSize];
    paperSize.width -= ([printInfo leftMargin] + [printInfo rightMargin]) - defaultTextPadding() * 2.0;
    paperSize.height -= ([printInfo topMargin] + [printInfo bottomMargin]);
    return paperSize;
}

- (NSRect)documentRectForPageNumber:(unsigned)pageNumber {	/* First page is page 0, of course! */
    NSRect rect = [self pageRectForPageNumber:pageNumber];
    rect.origin.x += [printInfo leftMargin] - defaultTextPadding();
    rect.origin.y += [printInfo topMargin];
    rect.size = [self documentSizeInPage];
    return rect;
}

- (NSRect)pageRectForPageNumber:(unsigned)pageNumber {
    NSRect rect;
    rect.size = [printInfo paperSize];
    rect.origin = [self frame].origin;
    rect.origin.y += ((rect.size.height + [self pageSeparatorHeight]) * pageNumber);
    return rect;
}

- (void)setLineColor:(NSColor *)color {
    if (color != lineColor) {
        [lineColor autorelease];
        lineColor = [color copyWithZone:[self zone]];
        [self setNeedsDisplay:YES];
    }
}

- (NSColor *)lineColor {
    return lineColor;
}

- (void)setMarginColor:(NSColor *)color {
    if (color != marginColor) {
        [marginColor autorelease];
        marginColor = [color copyWithZone:[self zone]];
        [self setNeedsDisplay:YES];
    }
}

- (NSColor *)marginColor {
    return marginColor;
}

- (void)drawRect:(NSRect)rect {
    if ([[NSGraphicsContext currentContext] isDrawingToScreen]) {
        NSSize paperSize = [printInfo paperSize];
        unsigned firstPage = rect.origin.y / (paperSize.height + [self pageSeparatorHeight]);
        unsigned lastPage = NSMaxY(rect) / (paperSize.height + [self pageSeparatorHeight]);
        unsigned cnt;
        
        [marginColor set];
        NSRectFill(rect);

        [lineColor set];
        for (cnt = firstPage; cnt <= lastPage; cnt++) {
	    // Draw boundary around the page, making sure it doesn't overlap the document area in terms of pixels
	    NSRect docRect = NSInsetRect([self centerScanRect:[self documentRectForPageNumber:cnt]], -1.0, -1.0);
	    NSFrameRectWithWidth(docRect, 1.0);
        }

        if ([[self superview] isKindOfClass:[NSClipView class]]) {
	    NSColor *backgroundColor = [(NSClipView *)[self superview] backgroundColor];
            [backgroundColor set];
            for (cnt = firstPage; cnt <= lastPage; cnt++) {
		NSRect pageRect = [self pageRectForPageNumber:cnt];
		NSRectFill (NSMakeRect(pageRect.origin.x, NSMaxY(pageRect), pageRect.size.width, [self pageSeparatorHeight]));
            }
        }
    }
}

/**** Printing support... ****/

- (BOOL)knowsPageRange:(NSRangePointer)aRange {
    aRange->length = [self numberOfPages];
    return YES;
}

- (NSRect)rectForPage:(int)page {
    return [self documentRectForPageNumber:page-1];  /* Our page numbers start from 0; the kit's from 1 */
}

@end
