/*
        ScalingScrollView.m
        Copyright (c) 1995-2005 by Apple Computer, Inc., all rights reserved.
        Author: Mike Ferris
*/
/*
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 redistribute this Apple software.
 
 In consideration of your agreement to abide by the following terms, and subject to these 
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 this original Apple software (the "Apple Software"), to use, reproduce, modify and 
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 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, 
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*/

#import <Cocoa/Cocoa.h>
#import "ScalingScrollView.h"

/* For genstrings:
    NSLocalizedStringFromTable(@"10%", @"ZoomValues", @"Zoom popup entry")
    NSLocalizedStringFromTable(@"25%", @"ZoomValues", @"Zoom popup entry")
    NSLocalizedStringFromTable(@"50%", @"ZoomValues", @"Zoom popup entry")
    NSLocalizedStringFromTable(@"75%", @"ZoomValues", @"Zoom popup entry")
    NSLocalizedStringFromTable(@"100%", @"ZoomValues", @"Zoom popup entry")
    NSLocalizedStringFromTable(@"125%", @"ZoomValues", @"Zoom popup entry")
    NSLocalizedStringFromTable(@"150%", @"ZoomValues", @"Zoom popup entry")
    NSLocalizedStringFromTable(@"200%", @"ZoomValues", @"Zoom popup entry")
    NSLocalizedStringFromTable(@"400%", @"ZoomValues", @"Zoom popup entry")
    NSLocalizedStringFromTable(@"800%", @"ZoomValues", @"Zoom popup entry")
    NSLocalizedStringFromTable(@"1600%", @"ZoomValues", @"Zoom popup entry")
*/   
static NSString *_NSDefaultScaleMenuLabels[] = {/* @"Set...", */ @"10%", @"25%", @"50%", @"75%", @"100%", @"125%", @"150%", @"200%", @"400%", @"800%", @"1600%"};
static float _NSDefaultScaleMenuFactors[] = {/* 0.0, */ 0.1, 0.25, 0.5, 0.75, 1.0, 1.25, 1.5, 2.0, 4.0, 8.0, 16.0};
static unsigned _NSDefaultScaleMenuSelectedItemIndex = 4;
static float _NSScaleMenuFontSize = 10.0;

@implementation ScalingScrollView

- (id)initWithFrame:(NSRect)rect {
    if ((self = [super initWithFrame:rect])) {
        scaleFactor = 1.0;
    }
    return self;
}

- (void)makeScalePopUpButton {
    if (_scalePopUpButton == nil) {
        unsigned cnt, numberOfDefaultItems = (sizeof(_NSDefaultScaleMenuLabels) / sizeof(NSString *));
        id curItem;

        // create it
        _scalePopUpButton = [[NSPopUpButton allocWithZone:[self zone]] initWithFrame:NSMakeRect(0.0, 0.0, 1.0, 1.0) pullsDown:NO];
        [(NSPopUpButtonCell *)[_scalePopUpButton cell] setBezelStyle:NSShadowlessSquareBezelStyle];
        [[_scalePopUpButton cell] setArrowPosition:NSPopUpArrowAtBottom];
        
        // fill it
        for (cnt = 0; cnt < numberOfDefaultItems; cnt++) {
            [_scalePopUpButton addItemWithTitle:NSLocalizedStringFromTable(_NSDefaultScaleMenuLabels[cnt], @"ZoomValues", nil)];
            curItem = [_scalePopUpButton itemAtIndex:cnt];
            if (_NSDefaultScaleMenuFactors[cnt] != 0.0) {
                [curItem setRepresentedObject:[NSNumber numberWithFloat:_NSDefaultScaleMenuFactors[cnt]]];
            }
        }
        [_scalePopUpButton selectItemAtIndex:_NSDefaultScaleMenuSelectedItemIndex];

        // hook it up
        [_scalePopUpButton setTarget:self];
        [_scalePopUpButton setAction:@selector(scalePopUpAction:)];

        // set a suitable font
        [_scalePopUpButton setFont:[NSFont toolTipsFontOfSize:_NSScaleMenuFontSize]];

        // Make sure the popup is big enough to fit the cells.
        [_scalePopUpButton sizeToFit];

	// don't let it become first responder
	[_scalePopUpButton setRefusesFirstResponder:YES];

        // put it in the scrollview
        [self addSubview:_scalePopUpButton];
        [_scalePopUpButton release];
    }
}

- (void)tile {
    // Let the superclass do most of the work.
    [super tile];

    if (![self hasHorizontalScroller]) {
        if (_scalePopUpButton) [_scalePopUpButton removeFromSuperview];
        _scalePopUpButton = nil;
    } else {
	NSScroller *horizScroller;
	NSRect horizScrollerFrame, buttonFrame;
	
        if (!_scalePopUpButton) [self makeScalePopUpButton];

        horizScroller = [self horizontalScroller];
        horizScrollerFrame = [horizScroller frame];
        buttonFrame = [_scalePopUpButton frame];

        // Now we'll just adjust the horizontal scroller size and set the button size and location.
        horizScrollerFrame.size.width = horizScrollerFrame.size.width - buttonFrame.size.width;
        [horizScroller setFrameSize:horizScrollerFrame.size];

        buttonFrame.origin.x = NSMaxX(horizScrollerFrame);
        buttonFrame.size.height = horizScrollerFrame.size.height + 1.0;
        buttonFrame.origin.y = [self bounds].size.height - buttonFrame.size.height + 1.0;
        [_scalePopUpButton setFrame:buttonFrame];
    }
}

- (void)drawRect:(NSRect)rect {
    NSRect verticalLineRect;
    
    [super drawRect:rect];

    if ([_scalePopUpButton superview]) {
        verticalLineRect = [_scalePopUpButton frame];
        verticalLineRect.origin.x -= 1.0;
        verticalLineRect.size.width = 1.0;
        if (NSIntersectsRect(rect, verticalLineRect)) {
            [[NSColor blackColor] set];
            NSRectFill(verticalLineRect);
        }
    }
}

- (void)scalePopUpAction:(id)sender {
    NSNumber *selectedFactorObject = [[sender selectedCell] representedObject];
    
    if (selectedFactorObject == nil) {
        NSLog(@"Scale popup action: setting arbitrary zoom factors is not yet supported.");
        return;
    } else {
        [self setScaleFactor:[selectedFactorObject floatValue] adjustPopup:NO];
    }
}

- (float)scaleFactor {
    return scaleFactor;
}

- (void)setScaleFactor:(float)newScaleFactor adjustPopup:(BOOL)flag {
    if (scaleFactor != newScaleFactor) {
	NSSize curDocFrameSize, newDocBoundsSize;
	NSView *clipView = [[self documentView] superview];
	
        if (flag) {	// Coming from elsewhere, first validate it
            unsigned cnt = 0, numberOfDefaultItems = (sizeof(_NSDefaultScaleMenuFactors) / sizeof(float));
    
            // We only work with some preset zoom values, so choose one of the appropriate values (Fudge a little for floating point == to work)
            while (cnt < numberOfDefaultItems && newScaleFactor * .99 > _NSDefaultScaleMenuFactors[cnt]) cnt++;
            if (cnt == numberOfDefaultItems) cnt--;
            [_scalePopUpButton selectItemAtIndex:cnt];
            scaleFactor = _NSDefaultScaleMenuFactors[cnt];
        } else {
            scaleFactor = newScaleFactor;
        }
	
	// Get the frame.  The frame must stay the same.
	curDocFrameSize = [clipView frame].size;
	
	// The new bounds will be frame divided by scale factor
	newDocBoundsSize.width = curDocFrameSize.width / scaleFactor;
	newDocBoundsSize.height = curDocFrameSize.height / scaleFactor;
	
	[clipView setBoundsSize:newDocBoundsSize];
    }
}

- (void)setHasHorizontalScroller:(BOOL)flag {
    if (!flag) [self setScaleFactor:1.0 adjustPopup:NO];
    [super setHasHorizontalScroller:flag];
}

@end
