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August 29, 2015 14:03
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Nashy Transposition, Take 1
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| var keys = { | |
| c: ['C', 'D', 'E', 'F', 'G', 'A', 'B'], | |
| cSharp: ['C#', 'D#', 'E#', 'F#', 'G#', 'A#', 'B#'], | |
| d: ['D', 'E', 'F#', 'G', 'A', 'B', 'C#'], | |
| dSharp: ['D#', 'E#', 'Fx', 'G#', 'A#', 'Bx', 'C#'], | |
| eFlat: ['Eb', 'F', 'G', 'Ab', 'Bb', 'C', 'D'], | |
| e: ['E', 'F#', 'G#', 'A', 'B', 'C#', 'D#'], | |
| f: ['F', 'G', 'A', 'Bb', 'C', 'D', 'E'], | |
| fSharp: ['F#', 'G#', 'A#', 'B', 'C#', 'D#', 'E#'], | |
| gFlat: ['Gb', 'Ab', 'Bb', 'Cb', 'Db', 'Eb', 'F'], | |
| g: ['G', 'A', 'B', 'C', 'D', 'E', 'F#'], | |
| gSharp: ['G#', 'A#', 'Bx', 'C#', 'D#', 'E#', 'Fx'], | |
| aFlat: ['Ab', 'Bb', 'C', 'Db', 'Eb', 'F'], | |
| a: ['A', 'B', 'C#', 'D', 'E', 'F#', 'G#'], | |
| aSharp: ['A#', 'B#', 'Cx', 'D#', 'E#', 'F#', 'Gx'], | |
| bFlat: ['Bb', 'C', 'D', 'Eb', 'F', 'G', 'A'], | |
| b: ['B', 'C#', 'D#', 'E', 'F#', 'G#', 'A#'], | |
| numbers: ['1', '2', '3', '4', '5', '6', '7'] | |
| } | |
| function findNextToken(token, index, text){ | |
| return text.indexOf(token, index); | |
| } | |
| function processText(text, originalKey, destinationKey){ | |
| var result = ''; | |
| for (var i=0; i<text.length; i++){ | |
| var character = text[i]; | |
| var reNotes = new RegExp("([A-G])"); | |
| if (text[i] == '<'){ | |
| var endDiamond = findNextToken('>', i, text); | |
| //do something to mark the diamonds | |
| } | |
| if (text[i] == '_'){ | |
| var endUnderscore = findNextToken('_', i, text); | |
| //do something to mark the split bars | |
| } | |
| if (text[i] == '['){ | |
| var endBracket = findNextToken(']', i, text); | |
| //do something to mark section names and ignore transposition | |
| } | |
| if (text[i].match(reNotes)){ | |
| switch (text[i]){ | |
| case keys[originalKey][0]: | |
| result += keys[destinationKey][0]; | |
| break; | |
| case keys[originalKey][1]: | |
| result += keys[destinationKey][1]; | |
| break; | |
| case keys[originalKey][2]: | |
| result += keys[destinationKey][2]; | |
| break; | |
| case keys[originalKey][3]: | |
| result += keys[destinationKey][3]; | |
| break; | |
| case keys[originalKey][4]: | |
| result += keys[destinationKey][4]; | |
| break; | |
| case keys[originalKey][5]: | |
| result += keys[destinationKey][5]; | |
| break; | |
| case keys[originalKey][6]: | |
| result += keys[destinationKey][6]; | |
| break; | |
| case keys[originalKey][7]: | |
| result += keys[destinationKey][7]; | |
| break; | |
| } | |
| } | |
| else | |
| result += text[i]; | |
| } | |
| return result; | |
| } |
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