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retrogtxretrogtx
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refactor
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‎js/mxml.js‎

Lines changed: 41 additions & 108 deletions
Original file line numberDiff line numberDiff line change
@@ -13,36 +13,43 @@
1313
/* exported saveMxmlOutput */
1414

1515
saveMxmlOutput = (logo) => {
16-
// temporary until I get more things sorted out
1716
const ignore = ["voice two", "voice one", "one voice"];
1817
let res = "";
1918
let indent = 0;
2019

2120
const add = (str) => {
22-
for (let i = 0; i < indent; i++) {
23-
res += " ";
24-
}
25-
res += str + "\n";
21+
res += " ".repeat(indent) + str + "\n";
22+
};
23+
24+
const addDirection = (type) => {
25+
add('<direction placement="above">');
26+
indent++;
27+
add("<direction-type>");
28+
indent++;
29+
add(`<wedge type="${type}"/>`);
30+
indent--;
31+
add("</direction-type>");
32+
indent--;
33+
add("</direction>");
34+
};
35+
36+
const addMeasureAttributes = (measure, div, beats, beatType) => {
37+
add(`<measure number="${measure}"> <attributes> <divisions>${div}</divisions> <key> <fifths>0</fifths> </key> <time> <beats>${beats}</beats> <beat-type>${beatType}</beat-type> </time> <clef> <sign>G</sign> <line>2</line> </clef> </attributes>`);
2638
};
2739

2840
add("<?xml version='1.0' encoding='UTF-8'?>");
29-
add(
30-
'<!DOCTYPE score-partwise PUBLIC "-//Recordare//DTD MusicXML 3.1 Partwise//EN" "http://www.musicxml.org/dtds/partwise.dtd">'
31-
);
41+
add('<!DOCTYPE score-partwise PUBLIC "-//Recordare//DTD MusicXML 3.1 Partwise//EN" "http://www.musicxml.org/dtds/partwise.dtd">');
3242
add('<score-partwise version="3.1">');
3343
indent++;
3444
add("<part-list>");
3545
indent++;
3646

37-
// Why is logo.notation.notationStaging an object and not an array?
3847
Object.keys(logo.notation.notationStaging).forEach((voice) => {
39-
if (logo.notation.notationStaging[voice].length === 0) {
40-
return;
41-
}
48+
if (logo.notation.notationStaging[voice].length === 0) return;
4249
voiceNum = parseInt(voice) + 1;
43-
add('<score-part id="P' + voiceNum + '">');
50+
add(`<score-part id="P${voiceNum}">`);
4451
indent++;
45-
add("<part-name> Voice #" + voiceNum + " </part-name>");
52+
add(`<part-name> Voice #${voiceNum} </part-name>`);
4653
indent--;
4754
add("</score-part>");
4855
});
@@ -51,71 +58,35 @@ saveMxmlOutput = (logo) => {
5158
indent--;
5259

5360
Object.keys(logo.notation.notationStaging).forEach((voice) => {
54-
if (logo.notation.notationStaging[voice].length === 0) {
55-
return;
56-
}
61+
if (logo.notation.notationStaging[voice].length === 0) return;
5762
voiceNum = parseInt(voice) + 1;
5863
indent++;
59-
add('<part id="P' + voiceNum + '">');
64+
add(`<part id="P${voiceNum}">`);
6065
indent++;
6166

62-
// assume 4/4 time, 32 divisions bc smallest note is 1/32
63-
// key is C by default
64-
let currMeasure = 1;
65-
let divisions = 32;
66-
let beats = 4;
67-
let beatType = 4;
68-
let beatsChanged = false;
69-
let newDivisions = -1;
70-
let newBeats = -1;
71-
let newBeatType = -1;
72-
let openedMeasureTag = false;
73-
let queuedTempo = null;
74-
let firstMeasure = true;
67+
let currMeasure = 1, divisions = 32, beats = 4, beatType = 4;
68+
let beatsChanged = false, newDivisions = -1, newBeats = -1, newBeatType = -1;
69+
let openedMeasureTag = false, queuedTempo = null, firstMeasure = true;
7570
indent++;
7671
let divisionsLeft = divisions;
7772
const notes = logo.notation.notationStaging[voice];
7873

79-
for (let i = 0; i < notes.length; i += 1) {
80-
// obj = [note, duration, dotCount, tupletValue, roundDown, insideChord, staccato]
74+
for (let i = 0; i < notes.length; i++) {
8175
const obj = notes[i];
82-
if (["tie", "begin slur", "end slur"].includes(obj)) {
83-
continue;
84-
}
76+
if (["tie", "begin slur", "end slur"].includes(obj) || ignore.includes(obj)) continue;
8577

86-
if (ignore.includes(obj)) {
87-
continue;
88-
}
89-
90-
// ignore key
9178
if (obj === "key") {
9279
i += 2;
9380
continue;
9481
}
9582

9683
if (obj === "begin crescendo") {
97-
add('<direction placement="above">');
98-
indent++;
99-
add("<direction-type>");
100-
indent++;
101-
add('<wedge type="crescendo"/>');
102-
indent--;
103-
add("</direction-type>");
104-
indent--;
105-
add("</direction>");
84+
addDirection("crescendo");
10685
continue;
10786
}
10887

10988
if (obj === "begin decrescendo") {
110-
add('<direction placement="above">');
111-
indent++;
112-
add("<direction-type>");
113-
indent++;
114-
add('<wedge type="diminuendo"/>');
115-
indent--;
116-
add("</direction-type>");
117-
indent--;
118-
add("</direction>");
89+
addDirection("diminuendo");
11990
continue;
12091
}
12192

@@ -136,11 +107,10 @@ saveMxmlOutput = (logo) => {
136107
const bpm = notes[i + 1];
137108
const beatMeasure = notes[i + 2];
138109
const bpmAdjusted = Math.floor(bpm * (4 / beatMeasure));
139-
140110
if (openedMeasureTag) {
141-
add('<sound tempo="' + bpmAdjusted + '"/>');
111+
add(`<sound tempo="${bpmAdjusted}"/>`);
142112
} else {
143-
queuedTempo = '<sound tempo="' + bpmAdjusted + '"/>';
113+
queuedTempo = `<sound tempo="${bpmAdjusted}"/>`;
144114
}
145115
i += 2;
146116
continue;
@@ -149,23 +119,19 @@ saveMxmlOutput = (logo) => {
149119
if (obj === "meter") {
150120
newBeats = notes[i + 1];
151121
newBeatType = notes[i + 2];
152-
153-
// divisions per beat == how many 1/32 notes fit in one beat?
154122
newDivisions = newBeats * (1 / newBeatType / (1 / 32));
155123
i += 2;
156124
beatsChanged = true;
157125
continue;
158126
}
159127

160-
// We only add </chord> tag to the non-first elements in a chord
161128
let isChordNote = false;
162129
for (const p of obj[0]) {
163130
let dur = 32 / obj[1];
164131
for (let j = 0; j < obj[2]; j++) dur += dur / 2;
165132

166133
if (divisionsLeft < dur && !isChordNote) {
167134
if (openedMeasureTag) {
168-
// throw "big chungus";
169135
add("</measure>");
170136
currMeasure++;
171137
divisionsLeft = divisions;
@@ -176,37 +142,17 @@ saveMxmlOutput = (logo) => {
176142
if (!isChordNote) {
177143
if (divisionsLeft === divisions) {
178144
if (firstMeasure) {
179-
add(
180-
'<measure number="' +
181-
currMeasure +
182-
'"> <attributes> <divisions>' +
183-
divisions +
184-
"</divisions> <key> <fifths>0</fifths> </key> <time> <beats>" +
185-
beats +
186-
"</beats> <beat-type>" +
187-
beatType +
188-
"</beat-type> </time> <clef> <sign>G</sign> <line>2</line> </clef> </attributes>"
189-
);
145+
addMeasureAttributes(currMeasure, divisions, beats, beatType);
190146
firstMeasure = false;
191147
} else if (beatsChanged) {
192148
beats = newBeats;
193149
beatType = newBeatType;
194150
divisions = newDivisions;
195151
divisionsLeft = divisions;
196-
add(
197-
'<measure number="' +
198-
currMeasure +
199-
'"> <attributes> <divisions>' +
200-
newDivisions +
201-
"</divisions> <key> <fifths>0</fifths> </key> <time> <beats>" +
202-
newBeats +
203-
"</beats> <beat-type>" +
204-
newBeatType +
205-
"</beat-type> </time> <clef> <sign>G</sign> <line>2</line> </clef> </attributes>"
206-
);
152+
addMeasureAttributes(currMeasure, newDivisions, newBeats, newBeatType);
207153
beatsChanged = false;
208154
} else {
209-
add('<measure number="' + currMeasure + '">');
155+
add(`<measure number="${currMeasure}">`);
210156
}
211157
openedMeasureTag = true;
212158
if (queuedTempo !== null) {
@@ -217,15 +163,7 @@ saveMxmlOutput = (logo) => {
217163
divisionsLeft -= dur;
218164
}
219165

220-
let alter;
221-
222-
if (p[1] === "\u266d") {
223-
alter = -1; // flat
224-
} else if (p[1] === "\u266F") {
225-
alter = 1; // sharp
226-
} else {
227-
alter = 0; // no accidental
228-
}
166+
let alter = p[1] === "\u266d" ? -1 : p[1] === "\u266F" ? 1 : 0;
229167

230168
add("<note>");
231169
indent++;
@@ -236,16 +174,14 @@ saveMxmlOutput = (logo) => {
236174
} else {
237175
add("<pitch>");
238176
indent++;
239-
add("<step>" + p[0] + "</step>");
240-
if (alter != 0) {
241-
add("<alter>" + alter + "</alter>");
242-
}
243-
add("<octave>" + p[p.length - 1] + "</octave>");
177+
add(`<step>${p[0]}</step>`);
178+
if (alter !== 0) add(`<alter>${alter}</alter>`);
179+
add(`<octave>${p[p.length - 1]}</octave>`);
244180
indent--;
245181
add("</pitch>");
246182
}
247183

248-
add("<duration>" + dur + "</duration>");
184+
add(`<duration>${dur}</duration>`);
249185
if (notes[i + 1] === "tie") {
250186
add('<tie type="start"/>');
251187
} else if (notes[i - 1] === "tie") {
@@ -257,9 +193,7 @@ saveMxmlOutput = (logo) => {
257193
indent++;
258194
add("<articulations>");
259195
indent++;
260-
if (obj[6]) {
261-
add('<staccato placement="below"/>');
262-
}
196+
if (obj[6]) add('<staccato placement="below"/>');
263197
indent--;
264198
add("</articulations>");
265199
indent--;
@@ -296,7 +230,6 @@ saveMxmlOutput = (logo) => {
296230
});
297231
add("</score-partwise>");
298232

299-
// Filter voices
300233
let mi = 1e5;
301234
for (let i = 0; i < res.length - 1; i++) {
302235
if ((res[i] === "P" || res[i] === "#") && "123456789".includes(res[i + 1])) {

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