File size: 2,449 Bytes
af6912c |
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 |
// abc_create_clef.js
var AbsoluteElement = require('./elements/absolute-element');
var glyphs = require('./glyphs');
var RelativeElement = require('./elements/relative-element');
var createClef = function (elem, tuneNumber) {
var clef;
var octave = 0;
elem.el_type = "clef";
var abselem = new AbsoluteElement(elem, 0, 10, 'staff-extra clef', tuneNumber);
abselem.isClef = true;
switch (elem.type) {
case "treble": clef = "clefs.G"; break;
case "tenor": clef = "clefs.C"; break;
case "alto": clef = "clefs.C"; break;
case "bass": clef = "clefs.F"; break;
case 'treble+8': clef = "clefs.G"; octave = 1; break;
case 'tenor+8': clef = "clefs.C"; octave = 1; break;
case 'bass+8': clef = "clefs.F"; octave = 1; break;
case 'alto+8': clef = "clefs.C"; octave = 1; break;
case 'treble-8': clef = "clefs.G"; octave = -1; break;
case 'tenor-8': clef = "clefs.C"; octave = -1; break;
case 'bass-8': clef = "clefs.F"; octave = -1; break;
case 'alto-8': clef = "clefs.C"; octave = -1; break;
case 'none': return null;
case 'perc': clef = "clefs.perc"; break;
default: abselem.addFixed(new RelativeElement("clef=" + elem.type, 0, 0, undefined, { type: "debug" }));
}
// if (elem.verticalPos) {
// pitch = elem.verticalPos;
// }
var dx = 5;
if (clef) {
var height = glyphs.symbolHeightInPitches(clef);
var ofs = clefOffsets(clef);
abselem.addRight(new RelativeElement(clef, dx, glyphs.getSymbolWidth(clef), elem.clefPos, { top: height + elem.clefPos + ofs, bottom: elem.clefPos + ofs }));
if (octave !== 0) {
var scale = 2 / 3;
var adjustspacing = (glyphs.getSymbolWidth(clef) - glyphs.getSymbolWidth("8") * scale) / 2;
var pitch = (octave > 0) ? abselem.top + 3 : abselem.bottom - 1;
var top = (octave > 0) ? abselem.top + 3 : abselem.bottom - 3;
var bottom = top - 2;
if (elem.type === "bass-8") {
// The placement for bass octave is a little different. It should hug the clef.
pitch = 3;
adjustspacing = 0;
}
abselem.addRight(new RelativeElement("8", dx + adjustspacing, glyphs.getSymbolWidth("8") * scale, pitch, {
scalex: scale,
scaley: scale,
top: top,
bottom: bottom
}));
//abselem.top += 2;
}
}
return abselem;
};
function clefOffsets(clef) {
switch (clef) {
case "clefs.G": return -5;
case "clefs.C": return -4;
case "clefs.F": return -4;
case "clefs.perc": return -2;
default: return 0;
}
}
module.exports = createClef;
|