/*

        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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 the Apple Software without specific prior written permission from Apple. Except as expressly

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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, 

 EXPRESS OR IMPLIED, INCLUDING WITHOUT LIMITATION THE IMPLIED WARRANTIES OF NON-INFRINGEMENT, 

 MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, REGARDING THE APPLE SOFTWARE OR ITS 

 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