Vex Flow Notation Author Larry Kuhns 2011 Implements Repetitions (Coda, signo, D.C., etc.)
Requires vex.js.
Vex.Flow.Repetition = (function() {
function Repetition(type, x, y_shift) {
if (arguments.length > 0) this.init(type, x, y_shift);
}
Repetition.type = {
NONE: 1, // no coda or segno
CODA_LEFT: 2, // coda at beginning of stave
CODA_RIGHT: 3, // coda at end of stave
SEGNO_LEFT: 4, // segno at beginning of stave
SEGNO_RIGHT: 5, // segno at end of stave
DC: 6, // D.C. at end of stave
DC_AL_CODA: 7, // D.C. al coda at end of stave
DC_AL_FINE: 8, // D.C. al Fine end of stave
DS: 9, // D.S. at end of stave
DS_AL_CODA: 10, // D.S. al coda at end of stave
DS_AL_FINE: 11, // D.S. al Fine at end of stave
FINE: 12 // Fine at end of stave
};
Vex.Inherit(Repetition, Vex.Flow.StaveModifier, {
init: function(type, x, y_shift) {
Repetition.superclass.init.call(this);
this.symbol_type = type;
this.x = x;
this.x_shift = 0;
this.y_shift = y_shift;
this.font = {
family: "times",
size: 12,
weight: "bold italic"
};
},
getCategory: function() { return "repetitions"; },
setShiftX: function(x) { this.x_shift = x; return this; },
setShiftY: function(y) { this.y_shift = y; return this; },
draw: function(stave, x) {
switch (this.symbol_type) {
case Repetition.type.CODA_RIGHT:
this.drawCodaFixed(stave, x + stave.width);
break;
case Repetition.type.CODA_LEFT:
this.drawSymbolText(stave, x, "Coda", true);
break;
case Repetition.type.SEGNO_LEFT:
this.drawSignoFixed(stave, x);
break;
case Repetition.type.SEGNO_RIGHT:
this.drawSignoFixed(stave, x + stave.width);
break;
case Repetition.type.DC:
this.drawSymbolText(stave, x, "D.C.", false);
break;
case Repetition.type.DC_AL_CODA:
this.drawSymbolText(stave, x, "D.C. al", true);
break;
case Repetition.type.DC_AL_FINE:
this.drawSymbolText(stave, x, "D.C. al Fine", false);
break;
case Repetition.type.DS:
this.drawSymbolText(stave, x, "D.S.", false);
break;
case Repetition.type.DS_AL_CODA:
this.drawSymbolText(stave, x, "D.S. al", true);
break;
case Repetition.type.DS_AL_FINE:
this.drawSymbolText(stave, x, "D.S. al Fine", false);
break;
case Repetition.type.FINE:
this.drawSymbolText(stave, x, "Fine", false);
break;
default:
break;
}
return this;
},
drawCodaFixed: function(stave, x) {
if (!stave.context) throw new Vex.RERR("NoCanvasContext",
"Can't draw stave without canvas context.");
var y = stave.getYForTopText(stave.options.num_lines) + this.y_shift;
Vex.Flow.renderGlyph(stave.context, this.x + x + this.x_shift,
y + 25, 40, "v4d", true);
return this;
},
drawSignoFixed: function(stave, x) {
if (!stave.context) throw new Vex.RERR("NoCanvasContext",
"Can't draw stave without canvas context.");
var y = stave.getYForTopText(stave.options.num_lines) + this.y_shift;
Vex.Flow.renderGlyph(stave.context, this.x + x + this.x_shift,
y + 25, 30, "v8c", true);
return this;
},
drawSymbolText: function(stave, x, text, draw_coda) {
if (!stave.context) throw new Vex.RERR("NoCanvasContext",
"Can't draw stave without canvas context.");
var ctx = stave.context;
ctx.save();
ctx.setFont(this.font.family, this.font.size, this.font.weight);Default to right symbol
var text_x = 0 + this.x_shift;
var symbol_x = x + this.x_shift;
if (this.symbol_type == Vex.Flow.Repetition.type.CODA_LEFT) {Offset Coda text to right of stave beginning
text_x = this.x + stave.options.vertical_bar_width;
symbol_x = text_x + ctx.measureText(text).width + 12;
} else {Offset Signo text to left stave end
symbol_x = this.x + x + stave.width - 5 + this.x_shift;
text_x = symbol_x - + ctx.measureText(text).width - 12;
}
var y = stave.getYForTopText(stave.options.num_lines) + this.y_shift;
if (draw_coda) {
Vex.Flow.renderGlyph(ctx, symbol_x, y, 40, "v4d", true);
}
ctx.fillText(text, text_x, y + 5);
ctx.restore();
return this;
}
});
return Repetition;
}());