OPTestKeyLoopView.m

OPTestKeyLoopView.m

//
//  OPTestKeyLoopView.m
//
// Copyright (c) 2013 AgileBits Inc.
//
// Permission is hereby granted, free of charge, to any person obtaining a copy
// of this software and associated documentation files (the "Software"), to deal
// in the Software without restriction, including without limitation the rights
// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
// copies of the Software, and to permit persons to whom the Software is furnished
// to do so, subject to the following conditions:
//
// The above copyright notice and this permission notice shall be included in all
// copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
// WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
// CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//

#import "OPTestKeyLoopView.h"


@interface OPTestKeyView : NSObject

@property (nonatomic, strong) NSString *title;
@property (nonatomic, strong) NSString *subtitle;
@property (nonatomic, strong) NSColor *color;
@property (nonatomic, strong) NSFont *font;
@property (nonatomic, assign) NSRect frame;

@end


@implementation OPTestKeyView

@end


@interface OPTestKeyLoopView ()

@property (nonatomic, strong) NSView *rootView;
@property (nonatomic, strong) NSMutableArray *keyViews;
@property (nonatomic) NSRect rootFrame;

@end


@implementation OPTestKeyLoopView

+ (OPTestKeyLoopView *)sharedTestKeyLoopView {
	static OPTestKeyLoopView *sharedView = nil;
	
	static dispatch_once_t onceToken;
	dispatch_once(&onceToken, ^{
		sharedView = [[self alloc] init];
		sharedView.autoresizingMask = NSViewWidthSizable | NSViewHeightSizable;
	});
	
	return sharedView;
}

+ (void)enableForView:(NSView *)startView {
	[self sharedTestKeyLoopView].rootView = startView;
	[[NSNotificationCenter defaultCenter] addObserver:[self sharedTestKeyLoopView] selector:@selector(mainWindowFlagsChanged:) name:OPMainWindowFlagsChangedNotification object:nil];
}

+ (void)disable {
	[self sharedTestKeyLoopView].rootView = nil;
	[[self sharedTestKeyLoopView] clear];
	[[NSNotificationCenter defaultCenter] removeObserver:self];
}

- (void)mainWindowFlagsChanged:(NSNotification *)aNotification {
	NSUInteger modifierFlags = ([NSApp currentEvent].modifierFlags & NSDeviceIndependentModifierFlagsMask);
	if (modifierFlags & NSAlternateKeyMask) {
		NSView *hitView = self.rootView;
		while (YES) {
			NSPoint mouse = [hitView convertPoint:[[self.rootView window] mouseLocationOutsideOfEventStream] fromView:nil];
			BOOL hitSubView = NO;
			for (NSView *subview in hitView.subviews) {
				if (subview == self) {
					continue;
				}
				if (NSMouseInRect(mouse, subview.frame, hitView.isFlipped)) {
					hitView = subview;
					hitSubView = YES;
					break;
				}
			}
			if (!hitSubView) {
				break;
			}
		}
		
		if (modifierFlags & NSShiftKeyMask) {
			[self showPreviousKeyViewLoopForView:hitView];
		}
		else {
			[self showNextKeyViewLoopForView:hitView];
		}
	}
	else {
		[self clear];
	}
}

- (void)insertIntoViewHirarchy {
	if (self.superview) {
		[self removeFromSuperview];
	}
	self.frame = [[[self.rootView window] contentView] frame];
	[[[self.rootView window] contentView] addSubview:self positioned:NSWindowAbove relativeTo:nil];
}

- (void)showPreviousKeyViewLoopForView:(NSView *)startView {
	[self insertIntoViewHirarchy];
	
	if (!self.keyViews) self.keyViews = [NSMutableArray new];
	[self.keyViews removeAllObjects];
	
	NSLog(@"+++PreviousKeyViewLoop");
	NSView *view = startView;
	NSMutableSet *visitedViews = [NSMutableSet new];
	NSInteger num = 0;
	do {
		NSRect frameInWindow = [view convertRect:view.bounds toView:nil];
		OPTestKeyView *keyView = [[OPTestKeyView alloc] init];
		keyView.frame = [self convertRect:frameInWindow fromView:nil];
		keyView.title = [NSString stringWithFormat:@"%ld", num];
		keyView.color = [NSColor redColor];
		keyView.font = [NSFont fontWithName:@"Menlo" size:12];
		
		NSLog(@"%ld %@", num, [view className]);
		[self.keyViews addObject:keyView];
		
		[visitedViews addObject:view];
		view = view.previousKeyView;
		num--;
	} while (view && ![visitedViews containsObject:view]);
	NSLog(@"---");
	
	self.rootFrame = [self convertRect:[startView convertRect:startView.bounds toView:nil] fromView:nil];
	[self setNeedsDisplay:YES];
}

- (void)showNextKeyViewLoopForView:(NSView *)startView {
	[self insertIntoViewHirarchy];
	
	if (!self.keyViews) self.keyViews = [NSMutableArray new];
	[self.keyViews removeAllObjects];
	
	NSLog(@"+++NextKeyViewLoop");
	NSView *view = startView;
	NSMutableSet *visitedViews = [NSMutableSet new];
	NSInteger num = 0;
	do {
		NSRect frameInWindow = [view convertRect:view.bounds toView:nil];
		OPTestKeyView *keyView = [[OPTestKeyView alloc] init];
		keyView.frame = [self convertRect:frameInWindow fromView:nil];
		keyView.title = [NSString stringWithFormat:@"%ld", num];
		keyView.color = [NSColor blueColor];
		keyView.font = [NSFont fontWithName:@"Menlo" size:12];
		
		NSLog(@"%ld %@", num, [view className]);
		[self.keyViews addObject:keyView];
		
		[visitedViews addObject:view];
		view = view.nextKeyView;
		num++;
	} while (view && ![visitedViews containsObject:view]);
	NSLog(@"---");
	
	self.rootFrame = [self convertRect:[startView convertRect:startView.bounds toView:nil] fromView:nil];
	[self setNeedsDisplay:YES];
}

- (void)clear {
	[self.keyViews removeAllObjects];
	[self removeFromSuperview];
}

- (NSDictionary *)attributesWithFont:(NSFont *)font color:(NSColor *)color {
	NSMutableParagraphStyle *paragraphStyle = [[NSParagraphStyle defaultParagraphStyle] mutableCopy];
	[paragraphStyle setAlignment:NSCenterTextAlignment];
	[paragraphStyle setLineBreakMode:NSLineBreakByTruncatingTail];
	[paragraphStyle setLineSpacing:0];
	
	NSDictionary *attributes = [[NSDictionary alloc] initWithObjectsAndKeys:
								font, NSFontAttributeName,
								color, NSForegroundColorAttributeName,
								paragraphStyle, NSParagraphStyleAttributeName, nil];
	return attributes;
}

- (void)drawRect:(NSRect)dirtyRect {
	if (self.keyViews.count > 0) {
		[[NSColor colorWithDeviceRed:1 green:0 blue:0 alpha:0.03] set];
		NSRectFillUsingOperation(self.rootFrame, NSCompositeSourceOver);
	}
	
	for (OPTestKeyView *keyView in self.keyViews) {
		[keyView.color set];
		[NSBezierPath setDefaultLineWidth:0.5];
		[NSBezierPath strokeRect:NSOffsetRect(NSIntegralRect(keyView.frame), 0.25, 0.25)];
		NSDictionary *attributes = [self attributesWithFont:keyView.font color:keyView.color];
		NSSize size = [keyView.title sizeWithAttributes:attributes];
		NSRect textRect = NSIntegralRectWithOptions(NSInsetRect(keyView.frame, (keyView.frame.size.width - size.width)/2, (keyView.frame.size.height - size.height)/2), NSAlignMinXOutward|NSAlignMaxXInward|NSAlignMinYOutward|NSAlignMaxYInward);
		[[NSColor whiteColor] set];
		NSRectFill(textRect);
		[keyView.title drawInRect:textRect withAttributes:attributes];
	}
}

- (BOOL)isOpaque {
	return NO;
}

- (NSView *)hitTest:(NSPoint)aPoint {
	return nil;
}

@end