transmission/macosx/BadgeView.mm

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// This file Copyright © 2007-2023 Transmission authors and contributors.
// It may be used under the MIT (SPDX: MIT) license.
// License text can be found in the licenses/ folder.
#import "BadgeView.h"
#import "NSStringAdditions.h"
#import "NSImageAdditions.h"
static CGFloat const kBetweenPadding = 2.0;
static NSImage* kWhiteUpArrow = [[NSImage imageNamed:@"UpArrowTemplate"] imageWithColor:NSColor.whiteColor];
static NSImage* kWhiteDownArrow = [[NSImage imageNamed:@"DownArrowTemplate"] imageWithColor:NSColor.whiteColor];
static CGSize kArrowInset;
static CGSize kArrowSize;
typedef NS_ENUM(NSInteger, ArrowDirection) {
ArrowDirectionUp,
ArrowDirectionDown,
};
@interface BadgeView ()
@property(nonatomic) NSMutableDictionary* fAttributes;
@property(nonatomic) CGFloat fDownloadRate;
@property(nonatomic) CGFloat fUploadRate;
@end
@implementation BadgeView
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- (instancetype)init
{
if ((self = [super init]))
{
_fDownloadRate = 0.0;
_fUploadRate = 0.0;
NSShadow* stringShadow = [[NSShadow alloc] init];
stringShadow.shadowOffset = NSMakeSize(2.0, -2.0);
stringShadow.shadowBlurRadius = 4.0;
_fAttributes = [[NSMutableDictionary alloc] initWithCapacity:3];
_fAttributes[NSForegroundColorAttributeName] = NSColor.whiteColor;
_fAttributes[NSShadowAttributeName] = stringShadow;
_fAttributes[NSFontAttributeName] = [NSFont boldSystemFontOfSize:23.0];
// DownloadBadge and UploadBadge should have the same size
NSSize badgeSize = [NSImage imageNamed:@"DownloadBadge"].size;
// DownArrowTemplate and UpArrowTemplate should have the same size
CGFloat arrowWidthHeightRatio = kWhiteDownArrow.size.width / kWhiteDownArrow.size.height;
// arrow height equal to font capital letter height + shadow
CGFloat arrowHeight = [_fAttributes[NSFontAttributeName] capHeight] + 4;
kArrowInset = { badgeSize.height * 0.2, badgeSize.height * 0.1 };
kArrowSize = { arrowHeight * arrowWidthHeightRatio, arrowHeight };
}
return self;
}
- (BOOL)setRatesWithDownload:(CGFloat)downloadRate upload:(CGFloat)uploadRate
{
//only needs update if the badges were displayed or are displayed now
if (self.fDownloadRate == downloadRate && self.fUploadRate == uploadRate)
{
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return NO;
}
self.fDownloadRate = downloadRate;
self.fUploadRate = uploadRate;
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return YES;
}
- (void)drawRect:(NSRect)rect
{
[NSApp.applicationIconImage drawInRect:rect fromRect:NSZeroRect operation:NSCompositingOperationSourceOver fraction:1.0];
BOOL const upload = self.fUploadRate >= 0.1;
BOOL const download = self.fDownloadRate >= 0.1;
CGFloat bottom = 0.0;
if (download)
{
NSImage* downloadBadge = [NSImage imageNamed:@"DownloadBadge"];
[self badge:downloadBadge arrow:ArrowDirectionDown string:[NSString stringForSpeedAbbrev:self.fDownloadRate] atHeight:bottom];
if (upload)
{
bottom += downloadBadge.size.height + kBetweenPadding; //upload rate above download rate
}
}
if (upload)
{
[self badge:[NSImage imageNamed:@"UploadBadge"] arrow:ArrowDirectionUp
string:[NSString stringForSpeedAbbrev:self.fUploadRate]
atHeight:bottom];
}
}
- (void)badge:(NSImage*)badge arrow:(ArrowDirection)arrowDirection string:(NSString*)string atHeight:(CGFloat)height
{
// background
NSRect badgeRect = { { 0.0, height }, badge.size };
[badge drawInRect:badgeRect fromRect:NSZeroRect operation:NSCompositingOperationSourceOver fraction:1.0];
//string is in center of image
NSSize stringSize = [string sizeWithAttributes:self.fAttributes];
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NSRect stringRect;
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stringRect.origin.x = NSMidX(badgeRect) - stringSize.width * 0.5;
stringRect.origin.y = NSMidY(badgeRect) - stringSize.height * 0.5 + 1.0; //adjust for shadow
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stringRect.size = stringSize;
[string drawInRect:stringRect withAttributes:self.fAttributes];
// arrow
NSImage* arrow = arrowDirection == ArrowDirectionUp ? kWhiteUpArrow : kWhiteDownArrow;
NSRect arrowRect = { { kArrowInset.width, stringRect.origin.y + kArrowInset.height + (arrowDirection == ArrowDirectionUp ? 0.5 : -0.5) },
kArrowSize };
[arrow drawInRect:arrowRect fromRect:NSZeroRect operation:NSCompositingOperationSourceOver fraction:1.0];
}
@end