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// abc_relative_element.js: Definition of the RelativeElement class.
var RelativeElement = function RelativeElement(c, dx, w, pitch, opt) {
opt = opt || {};
this.x = 0;
this.c = c; // character or path or string
this.dx = dx; // relative x position
this.w = w; // minimum width taken up by this element (can include gratuitous space)
this.pitch = pitch; // relative y position by pitch
this.scalex = opt.scalex || 1; // should the character/path be scaled?
this.scaley = opt.scaley || 1; // should the character/path be scaled?
this.type = opt.type || "symbol"; // cheap types.
this.pitch2 = opt.pitch2;
this.linewidth = opt.linewidth;
this.klass = opt.klass;
this.anchor = opt.anchor ? opt.anchor : 'middle'
this.top = pitch;
if (this.pitch2 !== undefined && this.pitch2 > this.top) this.top = this.pitch2;
this.bottom = pitch;
if (this.pitch2 !== undefined && this.pitch2 < this.bottom) this.bottom = this.pitch2;
if (opt.thickness) {
this.top += opt.thickness / 2;
this.bottom -= opt.thickness / 2;
}
if (opt.stemHeight) {
if (opt.stemHeight > 0)
this.top += opt.stemHeight;
else
this.bottom += opt.stemHeight;
}
if (opt.dim)
this.dim = opt.dim;
if (opt.position)
this.position = opt.position;
this.height = opt.height ? opt.height : 4; // The +1 is to give a little bit of padding.
if (opt.top)
this.top = opt.top;
if (opt.bottom)
this.bottom = opt.bottom;
if (opt.name)
this.name = opt.name;
else if (this.c)
this.name = this.c;
else
this.name = this.type;
if (opt.realWidth)
this.realWidth = opt.realWidth;
else
this.realWidth = this.w;
this.centerVertically = false;
switch (this.type) {
case "debug":
this.chordHeightAbove = this.height;
break;
case "lyric":
if (opt.position && opt.position === 'below')
this.lyricHeightBelow = this.height;
else
this.lyricHeightAbove = this.height;
break;
case "chord":
if (opt.position && opt.position === 'below')
this.chordHeightBelow = this.height;
else
this.chordHeightAbove = this.height;
break;
case "text":
if (this.pitch === undefined) {
if (opt.position && opt.position === 'below')
this.chordHeightBelow = this.height;
else
this.chordHeightAbove = this.height;
} else
this.centerVertically = true;
break;
case "part": this.partHeightAbove = this.height; break;
}
};
RelativeElement.prototype.getChordDim = function () {
if (this.type === "debug")
return null;
if (!this.chordHeightAbove && !this.chordHeightBelow)
return null;
// Chords are centered, annotations are left justified.
// NOTE: the font reports extra space to the left and right anyway, so there is a built in margin.
// We add a little margin so that items can't touch - we use half the font size as the margin, so that is 1/4 on each side.
// if there is only one character that we're printing, use half of that margin.
// var margin = this.dim.font.size/4;
// if (this.c.length === 1)
// margin = margin / 2;
var margin = 0;
var offset = this.type === "chord" ? this.realWidth / 2 : 0;
var left = this.x - offset - margin;
var right = left + this.realWidth + margin;
return { left: left, right: right };
};
RelativeElement.prototype.invertLane = function (total) {
if (this.lane === undefined)
this.lane = 0;
this.lane = total - this.lane - 1;
};
RelativeElement.prototype.putChordInLane = function (i) {
this.lane = i;
// Add some extra space to account for the character's descenders.
if (this.chordHeightAbove)
this.chordHeightAbove = (this.height * 1.25) * this.lane;
else
this.chordHeightBelow = (this.height * 1.25) * this.lane;
};
RelativeElement.prototype.getLane = function () {
if (this.lane === undefined)
return 0;
return this.lane;
};
RelativeElement.prototype.setX = function (x) {
this.x = x + this.dx;
};
module.exports = RelativeElement;
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