aboutsummaryrefslogtreecommitdiffstats
path: root/src/base/USongs.pas
blob: 25ad4ae31cc4f99b9595767efb2856c1b1af5d9b (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
{* UltraStar Deluxe - Karaoke Game
 *
 * UltraStar Deluxe is the legal property of its developers, whose names
 * are too numerous to list here. Please refer to the COPYRIGHT
 * file distributed with this source distribution.
 *
 * This program 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; either version 2
 * of the License, or (at your option) any later version.
 *
 * This program 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; see the file COPYING. If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 *
 * $URL$
 * $Id$
 *}

unit USongs;

interface

{$IFDEF FPC}
  {$MODE Delphi}
{$ENDIF}

{$I switches.inc}

{$IFDEF DARWIN}
  {$IFDEF DEBUG}
    {$DEFINE USE_PSEUDO_THREAD}
  {$ENDIF}
{$ENDIF}

uses
  SysUtils,
  Classes,
  {$IFDEF MSWINDOWS}
    Windows,
    DirWatch,
  {$ELSE}
    {$IFNDEF DARWIN}
    syscall,
    {$ENDIF}
    baseunix,
    UnixType,
  {$ENDIF}
  UPlatform,
  ULog,
  UTexture,
  UCommon,
  {$IFDEF USE_PSEUDO_THREAD}
  PseudoThread,
  {$ENDIF}
  UPath,
  USong,
  UIni,
  UCatCovers;

type
  TSongFilter = (
    fltAll,
    fltTitle,
    fltArtist
  );

  TBPM = record
    BPM:       real;
    StartBeat: real;
  end;

  TScore = record
    Name:   UTF8String;
    Score:  integer;
    Length: string;
  end;

  TPathDynArray = array of IPath;

  {$IFDEF USE_PSEUDO_THREAD}
  TSongs = class(TPseudoThread)
  {$ELSE}
  TSongs = class(TThread)
  {$ENDIF}
  private
    fParseSongDirectory: boolean;
    fProcessing:         boolean;
    {$ifdef MSWINDOWS}
    fDirWatch:           TDirectoryWatch;
    {$endif}
    procedure int_LoadSongList;
    procedure DoDirChanged(Sender: TObject);
  protected
    procedure Execute; override;
  public
    SongList: TList;          // array of songs
    Selected: integer;        // selected song index
    constructor Create();
    destructor  Destroy(); override;


    procedure LoadSongList;     // load all songs
    procedure FindFilesByExtension(const Dir: IPath; const Ext: IPath; Recursive: Boolean; var Files: TPathDynArray);
    procedure BrowseDir(Dir: IPath); // should return number of songs in the future
    procedure BrowseTXTFiles(Dir: IPath);
    procedure BrowseXMLFiles(Dir: IPath);
    procedure Sort(Order: TSortingType);
    property  Processing: boolean read fProcessing;
  end;


  TCatSongs = class
    Song:       array of TSong; // array of categories with songs
    Selected:   integer; // selected song index
    Order:      integer; // order type (0=title)
    CatNumShow: integer; // Category Number being seen
    CatCount:   integer; // Number of Categorys

    procedure SortSongs();
    procedure Refresh;                                      // refreshes arrays by recreating them from Songs array
    procedure ShowCategory(Index: integer);                 // expands all songs in category
    procedure HideCategory(Index: integer);                 // hides all songs in category
    procedure ClickCategoryButton(Index: integer);          // uses ShowCategory and HideCategory when needed
    procedure ShowCategoryList;                             // Hides all Songs And Show the List of all Categorys
    function FindNextVisible(SearchFrom: integer): integer; // Find Next visible Song
    function VisibleSongs: integer;                         // returns number of visible songs (for tabs)
    function VisibleIndex(Index: integer): integer;         // returns visible song index (skips invisible)

    function SetFilter(FilterStr: UTF8String; Filter: TSongFilter): cardinal;
  end;

var
  Songs:    TSongs;    // all songs
  CatSongs: TCatSongs; // categorized songs

const
  IN_ACCESS        = $00000001; //* File was accessed */
  IN_MODIFY        = $00000002; //* File was modified */
  IN_ATTRIB        = $00000004; //* Metadata changed */
  IN_CLOSE_WRITE   = $00000008; //* Writtable file was closed */
  IN_CLOSE_NOWRITE = $00000010; //* Unwrittable file closed */
  IN_OPEN          = $00000020; //* File was opened */
  IN_MOVED_FROM    = $00000040; //* File was moved from X */
  IN_MOVED_TO      = $00000080; //* File was moved to Y */
  IN_CREATE        = $00000100; //* Subfile was created */
  IN_DELETE        = $00000200; //* Subfile was deleted */
  IN_DELETE_SELF   = $00000400; //* Self was deleted */


implementation

uses
  StrUtils,
  UCovers,
  UFiles,
  UGraphic,
  UMain,
  UPathUtils,
  UNote,
  UFilesystem,
  UUnicodeUtils;

constructor TSongs.Create();
begin
  // do not start thread BEFORE initialization (suspended = true)
  inherited Create(true);
  Self.FreeOnTerminate := true;

  SongList := TList.Create();

  // FIXME: threaded loading does not work this way.
  // It will just cause crashes but nothing else at the moment.
(*
  {$ifdef MSWINDOWS}
    fDirWatch := TDirectoryWatch.create(nil);
    fDirWatch.OnChange     := DoDirChanged;
    fDirWatch.Directory    := SongPath;
    fDirWatch.WatchSubDirs := true;
    fDirWatch.active       := true;
  {$ENDIF}

  // now we can start the thread
  Resume();
*)

  // until it is fixed, simply load the song-list
  int_LoadSongList();
end;

destructor TSongs.Destroy();
begin
  FreeAndNil(SongList);
  inherited;
end;

procedure TSongs.DoDirChanged(Sender: TObject);
begin
  LoadSongList();
end;

procedure TSongs.Execute();
begin
{$IFDEF USE_PSEUDO_THREAD}
  int_LoadSongList();
{$ELSE}
  fParseSongDirectory := true;

  while not terminated do
  begin

    if fParseSongDirectory then
    begin
      Log.LogStatus('Calling int_LoadSongList', 'TSongs.Execute');
      int_LoadSongList();
    end;

    Suspend();
  end;
{$ENDIF}
end;

procedure TSongs.int_LoadSongList;
var
  I: integer;
begin
  try
    fProcessing := true;

    Log.LogStatus('Searching For Songs', 'SongList');

    // browse directories
    for I := 0 to SongPaths.Count-1 do
      BrowseDir(SongPaths[I] as IPath);

    if assigned(CatSongs) then
      CatSongs.Refresh;

    if assigned(CatCovers) then
      CatCovers.Load;

    //if assigned(Covers) then
    //  Covers.Load;

    if assigned(ScreenSong)  then
    begin
      ScreenSong.GenerateThumbnails();
      ScreenSong.OnShow; // refresh ScreenSong
    end;

  finally
    Log.LogStatus('Search Complete', 'SongList');

    fParseSongDirectory := false;
    fProcessing         := false;
  end;
end;


procedure TSongs.LoadSongList;
begin
  fParseSongDirectory := true;
  Resume();
end;

procedure TSongs.BrowseDir(Dir: IPath);
begin
  BrowseTXTFiles(Dir);
  BrowseXMLFiles(Dir);
end;

procedure TSongs.FindFilesByExtension(const Dir: IPath; const Ext: IPath; Recursive: Boolean; var Files: TPathDynArray);
var
  Iter: IFileIterator;
  FileInfo: TFileInfo;
  FileName: IPath;
begin
  // search for all files and directories
  Iter := FileSystem.FileFind(Dir.Append('*'), faAnyFile);
  while (Iter.HasNext) do
  begin
    FileInfo := Iter.Next;
    FileName := FileInfo.Name;
    if ((FileInfo.Attr and faDirectory) <> 0) then
    begin
      if Recursive and (not FileName.Equals('.')) and (not FileName.Equals('..')) then
        FindFilesByExtension(Dir.Append(FileName), Ext, true, Files);
    end
    else
    begin
      if (Ext.Equals(FileName.GetExtension(), true)) then
      begin
        SetLength(Files, Length(Files)+1);
        Files[High(Files)] := Dir.Append(FileName);
      end;
    end;
  end;
end;

procedure TSongs.BrowseTXTFiles(Dir: IPath);
var
  I: integer;
  Files: TPathDynArray;
  Song: TSong;
  Extension: IPath;
begin
  SetLength(Files, 0);
  Extension := Path('.txt');
  FindFilesByExtension(Dir, Extension, true, Files);

  for I := 0 to High(Files) do
  begin
    Song := TSong.Create(Files[I]);

    if Song.Analyse then
      SongList.Add(Song)
    else
    begin
      Log.LogError('AnalyseFile failed for "' + Files[I].ToNative + '".');
      FreeAndNil(Song);
    end;
  end;

  SetLength(Files, 0);
end;

procedure TSongs.BrowseXMLFiles(Dir: IPath);
var
  I: integer;
  Files: TPathDynArray;
  Song: TSong;
  Extension: IPath;
begin
  SetLength(Files, 0);
  Extension := Path('.xml');
  FindFilesByExtension(Dir, Extension, true, Files);

  for I := 0 to High(Files) do
  begin
    Song := TSong.Create(Files[I]);

    if Song.AnalyseXML then
      SongList.Add(Song)
    else
    begin
      Log.LogError('AnalyseFile failed for "' + Files[I].ToNative + '".');
      FreeAndNil(Song);
    end;
  end;

  SetLength(Files, 0);
end;

(*
 * Comparison functions for sorting
 *)

function CompareByEdition(Song1, Song2: Pointer): integer;
begin
  Result := UTF8CompareText(TSong(Song1).Edition, TSong(Song2).Edition);
end;

function CompareByGenre(Song1, Song2: Pointer): integer;
begin
  Result := UTF8CompareText(TSong(Song1).Genre, TSong(Song2).Genre);
end;

function CompareByTitle(Song1, Song2: Pointer): integer;
begin
  Result := UTF8CompareText(TSong(Song1).Title, TSong(Song2).Title);
end;

function CompareByArtist(Song1, Song2: Pointer): integer;
begin
  Result := UTF8CompareText(TSong(Song1).Artist, TSong(Song2).Artist);
end;

function CompareByFolder(Song1, Song2: Pointer): integer;
begin
  Result := UTF8CompareText(TSong(Song1).Folder, TSong(Song2).Folder);
end;

function CompareByLanguage(Song1, Song2: Pointer): integer;
begin
  Result := UTF8CompareText(TSong(Song1).Language, TSong(Song2).Language);
end;

procedure TSongs.Sort(Order: TSortingType);
var
  CompareFunc: TListSortCompare;
begin
  // FIXME: what is the difference between artist and artist2, etc.?
  case Order of
    sEdition: // by edition
      CompareFunc := CompareByEdition;
    sGenre: // by genre
      CompareFunc := CompareByGenre;
    sTitle: // by title
      CompareFunc := CompareByTitle;
    sArtist: // by artist
      CompareFunc := CompareByArtist;
    sFolder: // by folder
      CompareFunc := CompareByFolder;
    sArtist2: // by artist2
      CompareFunc := CompareByArtist;
    sLanguage: // by Language
      CompareFunc := CompareByLanguage;
    else
      Log.LogCritical('Unsupported comparison', 'TSongs.Sort');
      Exit; // suppress warning
  end; // case

  // Note: Do not use TList.Sort() as it uses QuickSort which is instable.
  // For example, if a list is sorted by title first and
  // by artist afterwards, the songs of an artist will not be sorted by title anymore.
  // The stable MergeSort guarantees to maintain this order. 
  MergeSort(SongList, CompareFunc);
end;

procedure TCatSongs.SortSongs();
begin
  case TSortingType(Ini.Sorting) of
    sEdition: begin
        Songs.Sort(sTitle);
        Songs.Sort(sArtist);
        Songs.Sort(sEdition);
      end;
    sGenre: begin
        Songs.Sort(sTitle);
        Songs.Sort(sArtist);
        Songs.Sort(sGenre);
      end;
    sLanguage: begin
        Songs.Sort(sTitle);
        Songs.Sort(sArtist);
        Songs.Sort(sLanguage);
      end;
    sFolder: begin
        Songs.Sort(sTitle);
        Songs.Sort(sArtist);
        Songs.Sort(sFolder);
      end;
    sTitle: begin
        Songs.Sort(sTitle);
      end;
    sArtist: begin
        Songs.Sort(sTitle);
        Songs.Sort(sArtist);
      end;
    sArtist2: begin
        Songs.Sort(sTitle);
        Songs.Sort(sArtist2);
      end;
  end; // case
end;

procedure TCatSongs.Refresh;
var
  SongIndex:   integer;
  CurSong:     TSong;
  CatIndex:    integer;    // index of current song in Song
  Letter:      UCS4Char;   // current letter for sorting using letter
  CurCategory: UTF8String; // current edition for sorting using edition, genre etc.
  Order:       integer;    // number used for ordernum
  LetterTmp:   UCS4Char;
  CatNumber:   integer;    // Number of Song in Category

  procedure AddCategoryButton(const CategoryName: UTF8String);
  var
    PrevCatBtnIndex: integer;
  begin
    Inc(Order);
    CatIndex := Length(Song);
    SetLength(Song, CatIndex+1);
    Song[CatIndex]          := TSong.Create();
    Song[CatIndex].Artist   := '[' + CategoryName + ']';
    Song[CatIndex].Main     := true;
    Song[CatIndex].OrderTyp := 0;
    Song[CatIndex].OrderNum := Order;
    Song[CatIndex].Cover    := CatCovers.GetCover(TSortingType(Ini.Sorting), CategoryName);
    Song[CatIndex].Visible  := true;

    // set number of songs in previous category
    PrevCatBtnIndex := CatIndex - CatNumber - 1;
    if ((PrevCatBtnIndex >= 0) and Song[PrevCatBtnIndex].Main) then
      Song[PrevCatBtnIndex].CatNumber := CatNumber;

    CatNumber := 0;
 end;

begin
  CatNumShow  := -1;

  SortSongs();

  CurCategory := '';
  Order       := 0;
  CatNumber   := 0;

  // Note: do NOT set Letter to ' ', otherwise no category-button will be
  // created for songs beginning with ' ' if songs of this category exist.
  // TODO: trim song-properties so ' ' will not occur as first chararcter. 
  Letter      := 0;

  // clear song-list
  for SongIndex := 0 to Songs.SongList.Count - 1 do
  begin
    // free category buttons
    // Note: do NOT delete songs, they are just references to Songs.SongList entries
    CurSong := TSong(Songs.SongList[SongIndex]);
    if (CurSong.Main) then
      CurSong.Free;
  end;
  SetLength(Song, 0);

  for SongIndex := 0 to Songs.SongList.Count - 1 do
  begin
    CurSong := TSong(Songs.SongList[SongIndex]);
    // if tabs are on, add section buttons for each new section
    if (Ini.Tabs = 1) then
    begin
      case (TSortingType(Ini.Sorting)) of
        sEdition: begin
          if (CompareText(CurCategory, CurSong.Edition) <> 0) then
          begin
            CurCategory := CurSong.Edition;

            // add Category Button
            AddCategoryButton(CurCategory);
          end;
        end;

        sGenre: begin
          if (CompareText(CurCategory, CurSong.Genre) <> 0) then
          begin
            CurCategory := CurSong.Genre;
            // add Genre Button
            AddCategoryButton(CurCategory);
          end;
        end;

        sLanguage: begin
          if (CompareText(CurCategory, CurSong.Language) <> 0) then
          begin
            CurCategory := CurSong.Language;
            // add Language Button
            AddCategoryButton(CurCategory);
          end
        end;

        sTitle: begin
          if (Length(CurSong.Title) >= 1) then
          begin
            LetterTmp := UCS4UpperCase(UTF8ToUCS4String(CurSong.Title)[0]);
            { all numbers and some punctuation chars are put into a
              category named '#'
              we can't put the other punctuation chars into this category
              because they are not in order, so there will be two different
              categories named '#' } 
            if (LetterTmp in [Ord('!') .. Ord('?')]) then
              LetterTmp := Ord('#')
            else
              LetterTmp := UCS4UpperCase(LetterTmp);
            if (Letter <> LetterTmp) then
            begin
              Letter := LetterTmp;
              // add a letter Category Button
              AddCategoryButton(UCS4ToUTF8String(Letter));
            end;
          end;
        end;

        sArtist: begin
          if (Length(CurSong.Artist) >= 1) then
          begin
            LetterTmp := UCS4UpperCase(UTF8ToUCS4String(CurSong.Artist)[0]);
            { all numbers and some punctuation chars are put into a
              category named '#'
              we can't put the other punctuation chars into this category
              because they are not in order, so there will be two different
              categories named '#' } 
            if (LetterTmp in [Ord('!') .. Ord('?')]) then
              LetterTmp := Ord('#')
            else
              LetterTmp := UCS4UpperCase(LetterTmp);
              
            if (Letter <> LetterTmp) then
            begin
              Letter := LetterTmp;
              // add a letter Category Button
              AddCategoryButton(UCS4ToUTF8String(Letter));
            end;
          end;
        end;

        sFolder: begin
          if (UTF8CompareText(CurCategory, CurSong.Folder) <> 0) then
          begin
            CurCategory := CurSong.Folder;
            // add folder tab
            AddCategoryButton(CurCategory);
          end;
        end;

        sArtist2: begin
          { this new sorting puts all songs by the same artist into
            a single category }
          if (UTF8CompareText(CurCategory, CurSong.Artist) <> 0) then
          begin
            CurCategory := CurSong.Artist;
            // add folder tab
            AddCategoryButton(CurCategory);
          end;
        end;

      end; // case (Ini.Sorting)
    end; // if (Ini.Tabs = 1)

    CatIndex := Length(Song);
    SetLength(Song, CatIndex+1);

    Inc(CatNumber); // increase number of songs in category

    // copy reference to current song
    Song[CatIndex] := CurSong;

    // set song's category info
    CurSong.OrderNum := Order; // assigns category
    CurSong.CatNumber := CatNumber;

    if (Ini.Tabs = 0) then
      CurSong.Visible := true
    else if (Ini.Tabs = 1) then
      CurSong.Visible := false;
{
    if (Ini.Tabs = 1) and (Order = 1) then
    begin
      //open first tab
      CurSong.Visible := true;
    end;
    CurSong.Visible := true;
}
  end;

  // set CatNumber of last category
  if (Ini.TabsAtStartup = 1) and (High(Song) >= 1) then
  begin
    // set number of songs in previous category
    SongIndex := CatIndex - CatNumber;
    if ((SongIndex >= 0) and Song[SongIndex].Main) then
      Song[SongIndex].CatNumber := CatNumber;
  end;

  // update number of categories
  CatCount := Order;
end;

procedure TCatSongs.ShowCategory(Index: integer);
var
  S: integer; // song
begin
  CatNumShow := Index;
  for S := 0 to high(CatSongs.Song) do
  begin
{
    if (CatSongs.Song[S].OrderNum = Index) and (not CatSongs.Song[S].Main) then
      CatSongs.Song[S].Visible := true
    else
      CatSongs.Song[S].Visible := false;
}
//  KMS: This should be the same, but who knows :-)
    CatSongs.Song[S].Visible := ((CatSongs.Song[S].OrderNum = Index) and (not CatSongs.Song[S].Main));
  end;
end;

procedure TCatSongs.HideCategory(Index: integer); // hides all songs in category
var
  S: integer; // song
begin
  for S := 0 to high(CatSongs.Song) do
  begin
    if not CatSongs.Song[S].Main then
      CatSongs.Song[S].Visible := false // hides all at now
  end;
end;

procedure TCatSongs.ClickCategoryButton(Index: integer);
var
  Num: integer;
begin
  Num := CatSongs.Song[Index].OrderNum;
  if Num <> CatNumShow then
  begin
    ShowCategory(Num);
  end
  else
  begin
    ShowCategoryList;
  end;
end;

//Hide Categorys when in Category Hack
procedure TCatSongs.ShowCategoryList;
var
  S: integer;
begin
  // Hide All Songs Show All Cats
  for S := 0 to high(CatSongs.Song) do
    CatSongs.Song[S].Visible := CatSongs.Song[S].Main;
  CatSongs.Selected := CatNumShow; //Show last shown Category
  CatNumShow := -1;
end;
//Hide Categorys when in Category Hack End

// Wrong song selected when tabs on bug
function TCatSongs.FindNextVisible(SearchFrom:integer): integer;// Find next Visible Song
var
  I: integer;
begin
  Result := -1;
  I := SearchFrom;
  while (Result = -1) do
  begin
    Inc (I);

    if (I > High(CatSongs.Song)) then
      I := Low(CatSongs.Song);
    if (I = SearchFrom) then // Make One Round and no song found->quit
      Break;

    if (CatSongs.Song[I].Visible) then
      Result := I;
  end;
end;
// Wrong song selected when tabs on bug End

(**
 * Returns the number of visible songs.
 *)
function TCatSongs.VisibleSongs: integer;
var
  SongIndex: integer;
begin
  Result := 0;
  for SongIndex := 0 to High(CatSongs.Song) do
  begin
    if (CatSongs.Song[SongIndex].Visible) then
      Inc(Result);
  end;
end;

(**
 * Returns the index of a song in the subset of all visible songs.
 * If all songs are visible, the result will be equal to the Index parameter. 
 *)
function TCatSongs.VisibleIndex(Index: integer): integer;
var
  SongIndex: integer;
begin
  Result := 0;
  for SongIndex := 0 to Index - 1 do
  begin
    if (CatSongs.Song[SongIndex].Visible) then
      Inc(Result);
  end;
end;

function TCatSongs.SetFilter(FilterStr: UTF8String; Filter: TSongFilter): cardinal;
var
  I, J:      integer;
  TmpString: UTF8String;
  WordArray: array of UTF8String;
begin
  FilterStr := Trim(FilterStr);
  if (FilterStr <> '') then
  begin
    Result := 0;

    // initialize word array
    SetLength(WordArray, 1);

    // Copy words to SearchStr
    I := Pos(' ', FilterStr);
    while (I <> 0) do
    begin
      WordArray[High(WordArray)] := Copy(FilterStr, 1, I-1);
      SetLength(WordArray, Length(WordArray) + 1);

      FilterStr := TrimLeft(Copy(FilterStr, I+1, Length(FilterStr)-I));
      I := Pos(' ', FilterStr);
    end;

    // Copy last word
    WordArray[High(WordArray)] := FilterStr;

    for I := 0 to High(Song) do
    begin
      if not Song[i].Main then
      begin
        case Filter of
          fltAll:
            TmpString := Song[I].Artist + ' ' + Song[i].Title + ' ' + Song[i].Folder;
          fltTitle:
            TmpString := Song[I].Title;
          fltArtist:
            TmpString := Song[I].Artist;
        end;
        Song[i].Visible := true;
        // Look for every searched word
        for J := 0 to High(WordArray) do
        begin
          Song[i].Visible := Song[i].Visible and
                             UTF8ContainsText(TmpString, WordArray[J])
        end;
        if Song[i].Visible then
          Inc(Result);
      end
      else
        Song[i].Visible := false;
    end;
    CatNumShow := -2;
  end
  else
  begin
    for i := 0 to High(Song) do
    begin
      Song[i].Visible := (Ini.Tabs = 1) = Song[i].Main;
      CatNumShow := -1;
    end;
    Result := 0;
  end;
end;

// -----------------------------------------------------------------------------

end.