transmission/macosx/PiecesView.mm

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// This file Copyright © 2006-2022 Transmission authors and contributors.
// It may be used under the MIT (SPDX: MIT) license.
// License text can be found in the licenses/ folder.
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#include <libtransmission/transmission.h>
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#import "PiecesView.h"
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#import "Torrent.h"
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#import "InfoWindowController.h"
#import "NSApplicationAdditions.h"
static NSInteger const kMaxAcross = 18;
static NSInteger const kMaxCells = kMaxAcross * kMaxAcross;
static CGFloat const kBetweenPadding = 1.0;
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static int8_t const kHighPeers = 10;
static NSColor* const DoneColor = NSColor.systemBlueColor;
static NSColor* const BlinkColor = NSColor.systemOrangeColor;
static NSColor* const HighColor = NSColor.systemGreenColor; // high availability
typedef struct PieceInfo
{
int8_t available[kMaxCells];
float complete[kMaxCells];
} PieceInfo;
@interface PiecesView ()
@end
@implementation PiecesView
{
PieceInfo fPieceInfo;
NSString* fRenderedHashString;
}
- (NSColor*)backgroundColor
{
return NSApp.darkMode ? NSColor.blackColor : NSColor.whiteColor;
}
- (BOOL)isCompletenessDone:(float)val
{
return val >= 1.0F;
}
- (BOOL)isCompletenessNone:(float)val
{
return val <= 0.0F;
}
- (NSColor*)completenessColor:(float)oldVal newVal:(float)newVal noBlink:(BOOL)noBlink
{
if ([self isCompletenessDone:newVal])
{
return noBlink || [self isCompletenessDone:oldVal] ? DoneColor : BlinkColor;
}
if ([self isCompletenessNone:newVal])
{
return noBlink || [self isCompletenessNone:oldVal] ? [self backgroundColor] : BlinkColor;
}
return [[self backgroundColor] blendedColorWithFraction:newVal ofColor:DoneColor];
}
- (BOOL)isAvailabilityDone:(uint8_t)val
{
return val == (uint8_t)-1;
}
- (BOOL)isAvailabilityNone:(uint8_t)val
{
return val == 0;
}
- (BOOL)isAvailabilityHigh:(uint8_t)val
{
return val >= kHighPeers;
}
- (NSColor*)availabilityColor:(int8_t)oldVal newVal:(int8_t)newVal noBlink:(bool)noBlink
{
if ([self isAvailabilityDone:newVal])
{
return noBlink || [self isAvailabilityDone:oldVal] ? DoneColor : BlinkColor;
}
if ([self isAvailabilityNone:newVal])
{
return noBlink || [self isAvailabilityNone:oldVal] ? [self backgroundColor] : BlinkColor;
}
if ([self isAvailabilityHigh:newVal])
{
return noBlink || [self isAvailabilityHigh:oldVal] ? HighColor : BlinkColor;
}
CGFloat percent = CGFloat(newVal) / kHighPeers;
return [[self backgroundColor] blendedColorWithFraction:percent ofColor:HighColor];
}
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- (void)drawRect:(NSRect)dirtyRect
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{
[[NSColor.controlTextColor colorWithAlphaComponent:0.2] setFill];
NSRectFill(dirtyRect);
[super drawRect:dirtyRect];
}
- (void)awakeFromNib
{
self.torrent = nil;
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}
- (void)viewDidChangeEffectiveAppearance
{
self.torrent = _torrent;
[self updateView];
}
- (void)dealloc
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{
}
- (void)setTorrent:(Torrent*)torrent
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{
_torrent = (torrent && !torrent.magnet) ? torrent : nil;
self.image = [[NSImage alloc] initWithSize:self.bounds.size];
[self clearView];
[self setNeedsDisplay];
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}
- (void)clearView
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{
fRenderedHashString = nil;
memset(&fPieceInfo, 0, sizeof(PieceInfo));
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}
- (void)updateView
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{
if (!self.torrent)
{
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return;
}
// get the previous state
PieceInfo const oldInfo = fPieceInfo;
BOOL const first = ![self.torrent.hashString isEqualToString:fRenderedHashString];
// get the current state
BOOL const showAvailability = [NSUserDefaults.standardUserDefaults boolForKey:@"PiecesViewShowAvailability"];
NSInteger const numCells = MIN(_torrent.pieceCount, kMaxCells);
PieceInfo info;
[self.torrent getAvailability:info.available size:numCells];
[self.torrent getAmountFinished:info.complete size:numCells];
// compute bounds and color of each cell
NSInteger const across = (NSInteger)ceil(sqrt(numCells));
CGFloat const fullWidth = self.bounds.size.width;
NSInteger const cellWidth = (NSInteger)((fullWidth - (across + 1) * kBetweenPadding) / across);
NSInteger const extraBorder = (NSInteger)((fullWidth - ((cellWidth + kBetweenPadding) * across + kBetweenPadding)) / 2);
NSMutableArray<NSValue*>* cellBounds = [NSMutableArray arrayWithCapacity:numCells];
NSMutableArray<NSColor*>* cellColors = [NSMutableArray arrayWithCapacity:numCells];
for (NSInteger index = 0; index < numCells; index++)
{
NSInteger const row = index / across;
NSInteger const col = index % across;
cellBounds[index] = [NSValue valueWithRect:NSMakeRect(
col * (cellWidth + kBetweenPadding) + kBetweenPadding + extraBorder,
fullWidth - (row + 1) * (cellWidth + kBetweenPadding) - extraBorder,
cellWidth,
cellWidth)];
cellColors[index] = showAvailability ?
[self availabilityColor:oldInfo.available[index] newVal:info.available[index] noBlink:first] :
[self completenessColor:oldInfo.complete[index] newVal:info.complete[index] noBlink:first];
}
// build an image with the cells
if (numCells > 0)
{
self.image = [NSImage imageWithSize:self.bounds.size flipped:NO drawingHandler:^BOOL(NSRect /*dstRect*/) {
NSRect cFillRects[numCells];
for (NSInteger i = 0; i < numCells; ++i)
{
cFillRects[i] = cellBounds[i].rectValue;
}
NSColor* cFillColors[numCells];
for (NSInteger i = 0; i < numCells; ++i)
{
cFillColors[i] = cellColors[i];
}
NSRectFillListWithColors(cFillRects, cFillColors, numCells);
return YES;
}];
[self setNeedsDisplay];
}
// save the current state so we can compare it later
fPieceInfo = info;
fRenderedHashString = self.torrent.hashString;
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}
- (BOOL)acceptsFirstMouse:(NSEvent*)event
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{
return YES;
}
- (void)mouseDown:(NSEvent*)event
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{
if (self.torrent)
{
BOOL const availability = ![NSUserDefaults.standardUserDefaults boolForKey:@"PiecesViewShowAvailability"];
[NSUserDefaults.standardUserDefaults setBool:availability forKey:@"PiecesViewShowAvailability"];
[self sendAction:self.action to:self.target];
}
[super mouseDown:event];
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}
@end