cog/Playlist/PlaylistView.m

//
//  PlaylistView.m
//  Cog
//
//  Created by Vincent Spader on 3/20/05.
//  Copyright 2005 Vincent Spader All rights reserved.
//

#import "PlaylistView.h"

#import <Carbon/Carbon.h>

#import "PlaylistEntry.h"

#import "CogAudio/Status.h"

#import "Logging.h"

@implementation PlaylistView

- (void)awakeFromNib {
    [[self menu] setAutoenablesItems:NO];

    // Configure bindings to scale font size and row height
    NSControlSize s = NSControlSizeSmall;
    NSFont *f = [NSFont systemFontOfSize:[NSFont systemFontSizeForControlSize:s]];
    // NSFont *bf = [[NSFontManager sharedFontManager] convertFont:f toHaveTrait:NSBoldFontMask];
    
    NSArray<NSTableColumn *> *columns = [[NSSet setWithArray:[self tableColumns]] allObjects];
    
    if ([columns count] < [[self tableColumns] count]) {
        // borkage in saved state
        NSArray<NSTableColumn *> *borkCols = [[self tableColumns] copy];
        for (NSTableColumn *col in borkCols) {
            [self removeTableColumn:col];
        }
        for (NSTableColumn *col in columns) {
            [self addTableColumn:col];
        }
    }

    for (NSTableColumn *col in columns) {
        [[col dataCell] setControlSize:s];
        [[col dataCell] setFont:f];
    }

    [self setVerticalMotionCanBeginDrag:YES];

    // Set up header context menu
    headerContextMenu = [[NSMenu alloc] initWithTitle:@"Playlist Header Context Menu"];

    NSSortDescriptor *sortDescriptor = [[NSSortDescriptor alloc] initWithKey:@"identifier"
                                                                   ascending:YES];
    NSArray *sortDescriptors = @[sortDescriptor];

    int visibleTableColumns = 0;
    int menuIndex = 0;
    for (NSTableColumn *col in [columns sortedArrayUsingDescriptors:sortDescriptors]) {
        NSString *title;
        if ([[col identifier] isEqualToString:@"status"]) {
            title = @"Status";
        } else if ([[col identifier] isEqualToString:@"index"]) {
            title = @"Index";
        } else {
            title = [[col headerCell] title];
        }

        NSMenuItem *contextMenuItem =
                [headerContextMenu insertItemWithTitle:title
                                                action:@selector(toggleColumn:)
                                         keyEquivalent:@""
                                               atIndex:menuIndex];

        [contextMenuItem setTarget:self];
        [contextMenuItem setRepresentedObject:col];
        [contextMenuItem setState:([col isHidden] ? NSControlStateValueOff : NSControlStateValueOn)];

        visibleTableColumns += ![col isHidden];
        menuIndex++;
    }

    if (visibleTableColumns == 0) {
        for (NSTableColumn *col in columns) {
            [col setHidden:NO];
        }
    }

    [[self headerView] setMenu:headerContextMenu];
}

- (IBAction)toggleColumn:(id)sender {
    id tc = [sender representedObject];

    if ([sender state] == NSControlStateValueOff) {
        [sender setState:NSControlStateValueOn];

        [tc setHidden:NO];
    } else {
        [sender setState:NSControlStateValueOff];

        [tc setHidden:YES];
    }
}

- (BOOL)acceptsFirstResponder {
    return YES;
}

- (BOOL)resignFirstResponder {
    return YES;
}

- (BOOL)acceptsFirstMouse:(NSEvent *)mouseDownEvent {
    return NO;
}

- (void)mouseDown:(NSEvent *)e {
    [super mouseDown:e];

    if ([e type] == NSEventTypeLeftMouseDown && [e clickCount] == 2 &&
            [[self selectedRowIndexes] count] == 1) {
        [playbackController play:self];
    }
}

// enables right-click selection for "Show in Finder" contextual menu
- (NSMenu *)menuForEvent:(NSEvent *)event {
    // Find which row is under the cursor
    [[self window] makeFirstResponder:self];
    NSPoint menuPoint = [self convertPoint:[event locationInWindow] fromView:nil];
    NSInteger iRow = [self rowAtPoint:menuPoint];
    NSMenu *tableViewMenu = [self menu];

    /* Update the table selection before showing menu
     Preserves the selection if the row under the mouse is selected (to allow for
     multiple items to be selected), otherwise selects the row under the mouse */
    BOOL currentRowIsSelected = [[self selectedRowIndexes] containsIndex:(NSUInteger) iRow];
    if (!currentRowIsSelected) {
        if (iRow == -1) {
            [self deselectAll:self];
        } else {
            [self selectRowIndexes:[NSIndexSet indexSetWithIndex:(NSUInteger) iRow] byExtendingSelection:NO];
        }
    }

    if ([self numberOfSelectedRows] <= 0) {
        // No rows are selected, so the table should be displayed with all items disabled
        int i;
        for (i = 0; i < [tableViewMenu numberOfItems]; i++) {
            [[tableViewMenu itemAtIndex:i] setEnabled:NO];
        }
    }

    return tableViewMenu;
}

- (void)keyDown:(NSEvent *)event {
    BOOL modifiersUsed =([event modifierFlags] & (NSEventModifierFlagShift |
                                                  NSEventModifierFlagControl |
                                                  NSEventModifierFlagOption |
                                                  NSEventModifierFlagCommand)) ? YES : NO;
    if (modifiersUsed) {
        [super keyDown:event];
        return;
    }

    switch ([event keyCode]) {
        case kVK_Space:
            [playbackController playPauseResume:self];
            break;
        case kVK_Escape:
            [playlistController clearFilterPredicate:self];
            break;

        case kVK_Delete:
        case kVK_ForwardDelete:
            [playlistController remove:self];
            break;

        case kVK_LeftArrow:
            [playbackController eventSeekBackward:self];
            break;

        case kVK_RightArrow:
            [playbackController eventSeekForward:self];
            break;

        case kVK_Return:
            [playbackController play:self];
            break;

        default:
            [super keyDown:event];
            break;
    }
}

- (IBAction)scrollToCurrentEntry:(id)sender {
    [self scrollRowToVisible:[[playlistController currentEntry] index]];
    [self selectRowIndexes:[NSIndexSet indexSetWithIndex:(NSUInteger) [[playlistController currentEntry] index]]
      byExtendingSelection:NO];
}

- (IBAction)undo:(id)sender {
    [[playlistController undoManager] undo];
}

- (IBAction)redo:(id)sender {
    [[playlistController undoManager] redo];
}

- (IBAction)copy:(id)sender {
    NSPasteboard *pboard = [NSPasteboard generalPasteboard];
    [pboard clearContents];

    NSArray *entries =
            [[playlistController content] objectsAtIndexes:[playlistController selectionIndexes]];
    NSUInteger capacity = [entries count];
    NSMutableArray *selectedURLs = [NSMutableArray arrayWithCapacity:capacity];

    for (PlaylistEntry *pe in entries) {
        [selectedURLs addObject:[pe URL]];
    }

    NSError *error;
    NSData *data;
    if (@available(macOS 10.13, *)) {
        data = [NSKeyedArchiver archivedDataWithRootObject:selectedURLs
                                     requiringSecureCoding:YES
                                                     error:&error];
    }
    else {
        data = [NSArchiver archivedDataWithRootObject:selectedURLs];
    }
    
    if (!data) {
        DLog(@"Error: %@", error);
    }
    [pboard setData:data forType:CogUrlsPboardType];

    NSMutableDictionary *tracks = [NSMutableDictionary dictionaryWithCapacity:capacity];

    unsigned long i = 0;
    for (NSURL *url in selectedURLs) {
        tracks[[NSString stringWithFormat:@"%lu", i++]] = @{@"Location": [url absoluteString]};
    }

    NSDictionary *itunesPlist = @{@"Tracks": tracks};

    [pboard setPropertyList:itunesPlist forType:iTunesDropType];

    NSMutableArray *filePaths = [NSMutableArray array];

    for (NSURL *url in selectedURLs) {
        if ([url isFileURL]) {
            [filePaths addObject:url];
        }
    }

    if ([filePaths count]) {
        [pboard writeObjects:filePaths];
    }
}

- (IBAction)cut:(id)sender {
    [self copy:sender];

    [playlistController removeObjectsAtArrangedObjectIndexes:[playlistController selectionIndexes]];

    if ([playlistController shuffle] != ShuffleOff) [playlistController resetShuffleList];
}

- (IBAction)paste:(id)sender {
    // Determine the type of object that was dropped
    NSPasteboardType fileType;
    if (@available(macOS 10.13, *)) {
        fileType = NSPasteboardTypeFileURL;
    }
    else {
        fileType = NSFilenamesPboardType;
    }
    NSArray *supportedTypes = @[CogUrlsPboardType, fileType, iTunesDropType];
    NSPasteboard *pboard = [NSPasteboard generalPasteboard];
    NSPasteboardType bestType = [pboard availableTypeFromArray:supportedTypes];
#ifdef _DEBUG
    DLog(@"All types:");
    for (NSPasteboardType type in [pboard types]) {
        DLog(@"    Type: %@", type);
    }
    DLog(@"Supported types:");
    for (NSPasteboardType type in supportedTypes) {
        DLog(@"    Type: %@", type);
    }
    DLog(@"Best type: %@", bestType);
#endif

    NSMutableArray *acceptedURLs = [NSMutableArray array];

    // Get files from an file drawer drop
    if ([bestType isEqualToString:CogUrlsPboardType]) {
        NSError *error;
        NSData *data = [pboard dataForType:CogUrlsPboardType];
        NSArray *urls;
        if (@available(macOS 11.0, *)) {
            urls = [NSKeyedUnarchiver unarchivedArrayOfObjectsOfClass:[NSURL class]
                                                             fromData:data
                                                                error:&error];
        } else {
            if (@available(macOS 10.13, *)) {
                NSSet *allowed = [NSSet setWithArray:@[[NSArray class], [NSURL class]]];
                urls = [NSKeyedUnarchiver unarchivedObjectOfClasses:allowed
                                                           fromData:data
                                                              error:&error];
            }
            else {
                urls = [NSUnarchiver unarchiveObjectWithData:data];
            }
        }
        if (!urls) {
            DLog(@"%@", error);
        } else {
            DLog(@"URLS: %@", urls);
        }
        //[playlistLoader insertURLs: urls atIndex:row sort:YES];
        [acceptedURLs addObjectsFromArray:urls];
    }

    // Get files from a normal file drop (such as from Finder)
    if ([bestType isEqualToString:fileType]) {
        NSMutableArray *urls = [[NSMutableArray alloc] init];

        for (NSString *file in [pboard propertyListForType:fileType]) {
            [urls addObject:[NSURL fileURLWithPath:file]];
        }

        //[playlistLoader insertURLs:urls atIndex:row sort:YES];
        [acceptedURLs addObjectsFromArray:urls];
    }

    // Get files from an iTunes drop
    if ([bestType isEqualToString:iTunesDropType]) {
        NSDictionary *iTunesDict = [pboard propertyListForType:iTunesDropType];
        NSDictionary *tracks = [iTunesDict valueForKey:@"Tracks"];

        // Convert the iTunes URLs to URLs....MWAHAHAH!
        NSMutableArray *urls = [[NSMutableArray alloc] init];

        for (NSDictionary *trackInfo in [tracks allValues]) {
            [urls addObject:[NSURL URLWithString:[trackInfo valueForKey:@"Location"]]];
        }

        //[playlistLoader insertURLs:urls atIndex:row sort:YES];
        [acceptedURLs addObjectsFromArray:urls];
    }

    if ([acceptedURLs count]) {
        NSUInteger row = [[playlistController content] count];

        [playlistController willInsertURLs:acceptedURLs origin:URLOriginInternal];

        NSArray *entries = [playlistLoader insertURLs:acceptedURLs atIndex:(int) row sort:NO];
        [playlistLoader didInsertURLs:entries origin:URLOriginInternal];

        if ([playlistController shuffle] != ShuffleOff) [playlistController resetShuffleList];
    }
}

- (IBAction)delete:(id)sender {
    [playlistController removeObjectsAtArrangedObjectIndexes:[playlistController selectionIndexes]];
}

- (BOOL)validateUserInterfaceItem:(id <NSValidatedUserInterfaceItem>)anItem {
    SEL action = [anItem action];

    if (action == @selector(undo:)) {
        return [[playlistController undoManager] canUndo];
    }
    if (action == @selector(redo:)) {
        return [[playlistController undoManager] canRedo];
    }
    if (action == @selector(cut:) || action == @selector(copy:) || action == @selector(delete:)) {
        return [[playlistController selectionIndexes] count] != 0;
    }
    if (action == @selector(paste:)) {
        NSPasteboard *pboard = [NSPasteboard generalPasteboard];
        
        NSPasteboardType fileType;
        if (@available(macOS 10.13, *)) {
            fileType = NSPasteboardTypeFileURL;
        }
        else {
            fileType = NSFilenamesPboardType;
        }

        NSArray *supportedTypes = @[CogUrlsPboardType, fileType, iTunesDropType];

        NSString *bestType = [pboard availableTypeFromArray:supportedTypes];

        return bestType != nil;
    }

    if (action == @selector(scrollToCurrentEntry:) &&
        (([playbackController playbackStatus] == CogStatusStopped) ||
                    ([playbackController playbackStatus] == CogStatusStopping)))
        return NO;

    return [super validateUserInterfaceItem:anItem];
}

#if 0
- (NSDragOperation)draggingSourceOperationMaskForLocal:(BOOL)isLocal
{
    if (isLocal)
        return NSDragOperationNone;
    else
        return NSDragOperationCopy;
}
#endif

@end