/*
 MultiplePageView.m
 Copyright (c) 1995-2006 by Apple Computer, Inc., all rights reserved.
 Author: Ali Ozer
 
 View which holds all the pages together in the multiple-page case
 */
/*
 IMPORTANT:  This Apple software is supplied to you by Apple Computer, Inc. ("Apple") in
 consideration of your agreement to the following terms, and your use, installation, 
 modification or redistribution of this Apple software constitutes acceptance of these 
 terms.  If you do not agree with these terms, please do not use, install, modify or 
 redistribute this Apple software.
 
 In consideration of your agreement to abide by the following terms, and subject to these 
 terms, Apple grants you a personal, non-exclusive license, under Apple's copyrights in 
 this original Apple software (the "Apple Software"), to use, reproduce, modify and 
 redistribute the Apple Software, with or without modifications, in source and/or binary 
 forms; provided that if you redistribute the Apple Software in its entirety and without 
 modifications, you must retain this notice and the following text and disclaimers in all 
 such redistributions of the Apple Software.  Neither the name, trademarks, service marks 
 or logos of Apple Computer, Inc. may be used to endorse or promote products derived from 
 the Apple Software without specific prior written permission from Apple. Except as expressly
 stated in this notice, no other rights or licenses, express or implied, are granted by Apple
 herein, including but not limited to any patent rights that may be infringed by your 
 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 
 DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 
 OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) ARISING IN ANY WAY OUT OF THE USE, 
 REPRODUCTION, MODIFICATION AND/OR DISTRIBUTION OF THE APPLE SOFTWARE, HOWEVER CAUSED AND 
 WHETHER UNDER THEORY OF CONTRACT, TORT (INCLUDING NEGLIGENCE), STRICT LIABILITY OR 
 OTHERWISE, EVEN IF APPLE HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 */

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

float defaultTextPadding(void) {
    static float padding = -1;
    if (padding < 0.0) {
        NSTextContainer *container = [[NSTextContainer alloc] init];
        padding = [container lineFragmentPadding];
        [container release];
    }
    return padding;
}


@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:(int)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))];
        }
    }
}

- (int)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:(int)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:(int)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];
        int firstPage = rect.origin.y / (paperSize.height + [self pageSeparatorHeight]);
        int lastPage = NSMaxY(rect) / (paperSize.height + [self pageSeparatorHeight]);
        int 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 {
    pageBeingPrinted = page;
    return [self documentRectForPageNumber:page-1];  /* Our page numbers start from 0; the kit's from 1 */
}

- (NSAttributedString *)pageHeader {
    NSTextView *tv = [[self subviews] objectAtIndex:pageBeingPrinted-1];
    NSLayoutManager *layoutManager = [tv layoutManager];
    
    NSRange r = [layoutManager glyphRangeForBoundingRect:[tv bounds] inTextContainer:[tv textContainer]];
    NSAttributedString *as = [tv attributedSubstringFromRange:r];
    
    NSString *title = [as attribute:@"VPPageName" atIndex:0 effectiveRange:&r];
        
    NSDictionary *atts = [NSDictionary dictionaryWithObjectsAndKeys:[NSFont boldSystemFontOfSize:18], NSFontAttributeName, nil];
        
    return [[[NSAttributedString alloc] initWithString:title attributes:atts] autorelease];
}


@end