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/*
 * Copyright 2011 Sven Weidauer <sven.weidauer@gmail.com>
 *
 * This file is part of NetSurf, http://www.netsurf-browser.org/
 *
 * NetSurf is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation; version 2 of the License.
 *
 * NetSurf is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#import "cocoa/URLFieldCell.h"

#import "utils/nsurl.h"
#import "netsurf/url_db.h"

@interface URLFieldCell ()

@property (readonly, retain, nonatomic) NSButtonCell *refreshCell;

- (NSRect) buttonFrame: (NSRect) cellFrame;
- (NSRect) urlFrame: (NSRect) cellFrame;
- (NSRect) iconFrame: (NSRect) cellFrame;

@end


@implementation URLFieldCell

@synthesize favicon;

- (void) setFavicon: (NSImage *)newIcon;
{
	if (favicon != newIcon) {
		[favicon release];
		favicon = [newIcon retain];
		[[self controlView] setNeedsDisplay: YES];
	}
}

#define BUTTON_SIZE 32
#define PADDING 2

- (void) drawInteriorWithFrame: (NSRect)cellFrame inView: (NSView *)controlView;
{
	[favicon drawInRect: [self iconFrame: cellFrame] fromRect: NSZeroRect 
			  operation: NSCompositeSourceOver fraction: 1.0];

	[super drawInteriorWithFrame: [self urlFrame: cellFrame] inView: controlView];

	[[self refreshCell] drawInteriorWithFrame: [self buttonFrame: cellFrame] 
									   inView: controlView];
}

- (void) selectWithFrame: (NSRect)aRect inView: (NSView *)controlView editor: (NSText *)textObj 
				delegate: (id)anObject start: (NSInteger)selStart length: (NSInteger)selLength;
{
	const NSRect textFrame = [self urlFrame: aRect];
	[super selectWithFrame: textFrame inView: controlView editor: textObj 
				  delegate: anObject start: selStart length: selLength];
}

- (void) editWithFrame: (NSRect)aRect inView: (NSView *)controlView editor: (NSText *)textObj 
			  delegate: (id)anObject event: (NSEvent *)theEvent;
{
	const NSRect textFrame = [self urlFrame: aRect];
	[super editWithFrame: textFrame inView: controlView editor: textObj 
				delegate: anObject event: theEvent];
}

- (void) startDragURLAt: (NSPoint) point inView: (NSView *) view;
{
	NSString *url = [self stringValue];
	NSString *title = url;
	nsurl *nsurl;

	if (nsurl_create( [url UTF8String] , &nsurl ) != NSERROR_OK)
		return;

	const struct url_data *data = urldb_get_url_data( nsurl );

	nsurl_unref(nsurl);

	if (data && data->title) title = [NSString stringWithUTF8String: data->title];

	NSPasteboard *pb = [NSPasteboard pasteboardWithName: NSDragPboard];
	[pb declareTypes: [NSArray arrayWithObjects: NSStringPboardType, NSURLPboardType, 
					   @"public.url", @"public.url-name", nil] owner: nil];
	[pb setString: url forType: NSStringPboardType];
	[pb setString: url forType: @"public.url"];
	[pb setString: title forType: @"public.url-name"];
	[[NSURL URLWithString: url] writeToPasteboard: pb];
	
	NSRect urlBounds = NSZeroRect;
	urlBounds.size = [title sizeWithAttributes: nil];
	urlBounds.size.width += urlBounds.size.height + 2;
	
	NSImage *image = [[NSImage alloc] initWithSize: urlBounds.size];
	
	[image lockFocus];
	[favicon drawInRect: NSMakeRect( urlBounds.origin.x, urlBounds.origin.y, urlBounds.size.height, urlBounds.size.height )
			   fromRect: NSZeroRect operation: NSCompositeCopy fraction: 1.0];
	urlBounds.origin.x += urlBounds.size.height + 2;
	[title drawInRect: urlBounds withAttributes: nil];
	[image unlockFocus];
	
	point.x -= urlBounds.size.height / 2;
	point.y += urlBounds.size.height / 2;
	
	[view dragImage: image at: point offset: NSZeroSize event: [NSApp currentEvent] 
		 pasteboard: pb source: self slideBack: YES];
	
	[image release];
}

- (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal
{
	return NSDragOperationCopy | NSDragOperationGeneric;
}

- (BOOL) trackMouse: (NSEvent *)theEvent inRect: (NSRect)cellFrame ofView: (NSView *)controlView untilMouseUp: (BOOL)flag;
{
	const NSPoint point = [controlView convertPoint: [theEvent locationInWindow] fromView: nil];
	const NSRect buttonRect = [self buttonFrame: cellFrame];
	if (NSPointInRect( point, [self iconFrame: cellFrame] )) {
		[self startDragURLAt: point inView: controlView];
		return NO;
	} else  if (NSPointInRect( point, buttonRect )) {
		return [[self refreshCell] trackMouse: theEvent inRect: buttonRect 
									   ofView: controlView untilMouseUp: flag];
	} else {
		cellFrame.size.width -= BUTTON_SIZE + PADDING;
		return [super trackMouse: theEvent inRect: cellFrame ofView: controlView untilMouseUp: YES];
	}
}

- (void) dealloc;
{
	[refreshCell release];

	[super dealloc];
}

- (NSRect) buttonFrame: (NSRect) cellFrame;
{
	NSRect buttonRect = cellFrame;
	buttonRect.origin.x = NSMaxX( cellFrame ) - BUTTON_SIZE;
	buttonRect.size.width = BUTTON_SIZE;
	return buttonRect;
}

- (NSRect) urlFrame: (NSRect) cellFrame;
{
	NSRect textFrame = cellFrame;
	textFrame.origin.x += cellFrame.size.height;
	textFrame.size.width -= cellFrame.size.height + BUTTON_SIZE + PADDING;
	return textFrame;
}

- (NSRect) iconFrame: (NSRect)cellFrame;
{
	NSRect iconFrame = {
		.origin = {
			.x = cellFrame.origin.x + PADDING,
			.y = cellFrame.origin.y,
		},
		.size = NSMakeSize(  NSHeight( cellFrame ), NSHeight( cellFrame ) )
	};
	return NSInsetRect( iconFrame, 2 * PADDING, 2 * PADDING );
}

- (NSButtonCell *) refreshCell;
{
	if (nil == refreshCell) {
		refreshCell = [[NSButtonCell alloc] initImageCell: [NSImage imageNamed: NSImageNameRefreshTemplate]];
		[refreshCell setButtonType: NSMomentaryPushInButton];
		[refreshCell setBordered: NO];
	}
	return refreshCell;
}

- (void) setRefreshTarget: (id) newTarget;
{
	[[self refreshCell] setTarget: newTarget];
}

- (id) refreshTarget;
{
	return [[self refreshCell] target];
}

- (void) setRefreshAction: (SEL) newAction;
{
	[[self refreshCell] setAction: newAction];
}

- (SEL) refreshAction;
{
	return [[self refreshCell] action];
}

@end