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// open string notes, starting from the deepest string.
const openStrings = ['E', 'A', 'D', 'G', 'B', 'E'];
// convert ‘string1’ ‘fret2’ in ‘form’ to F#
export function fretToNote(form, stringName, fretName) {
if (!form) {
console.error('fretToNote with no form!');
return 'C';
}
console.log('lookingforfret', stringName, form, form.querySelector(`.${stringName} .open`));
if (form.querySelector(`.${stringName}.muted`)) {
return 'x';
} else if (!fretName?.startsWith('fret')) {
return form.querySelector(`.${stringName} .open`).getAttribute("x-data-note");
} else {
return form.querySelector(`.${stringName} [value="${fretName}"]`).parentNode.getAttribute("x-data-note");
}
}
export default class extends HTMLElement {
static observedAttributes = ['strings', 'frets'];
static name = 'x-fretboard';
static register() {
console.debug('Registering Element', this.name, this);
customElements.define(this.name, this);
}
saveEvent = 'x-fretboard-save';
playEvent = 'x-fretboard-play';
stopEvent = 'x-fretboard-stop';
isPlaying = false;
constructor() {
super();
console.debug('Fretboard#constructor', this);
}
attributeChangedCallback(name, old, v) {
console.debug('Fretboard#attributeChangedCallback',
this, name, old, v);
this.formChanged();
}
connectedCallback() {
console.debug('Fretboard#connectedCallback', this);
const postEvent = (elt, eventName) => {
const res = (e) => {
e.preventDefault();
const event = new CustomEvent(eventName, {
bubbles: true,
cancelable: true,
detail: this
});
this.dispatchEvent(event);
};
return res.bind(this);
}
this.querySelectorAll('.save').forEach(elt => elt.onclick = postEvent(elt, this.saveEvent));
this.querySelectorAll('.play').forEach(elt => elt.onclick = e => {
if (this.isPlaying) {
(postEvent(elt, this.stopEvent))(e);
elt.innerText = 'play';
this.isPlaying = false;
} else {
(postEvent(elt, this.playEvent))(e);
elt.innerText = 'stop';
this.isPlaying = true;
}
});
this.formChanged();
}
get notes() {
return Array.from(this.querySelectorAll('x-string')).map(elt => {
return elt.getAttribute('value');
});
}
updateSelected(formData) {
// this.querySelectorAll('tbody .selected').forEach(elt => {
// const string = Array.from(elt.parentNode.classList).filter(x => x.startsWith('string'))[0];
// const val = formData.get(string);
// const note = Note.fromString(fretToNote(this, string, val));
// if (note.isSharp) {
// elt.innerText = `${note} / ${note.toAlternateString()}`;
// } else {
// elt.innerText = note;
// }
// });
}
zotStrings() {
console.debug('Fretboard#zotStrings', this);
const tmpl = this.querySelector('template.string');
console.log(' -- tmpl', tmpl);
const parent = tmpl.parentNode;
parent.querySelectorAll('[slot="string"]').forEach(elt => {
console.debug(' -- del', elt);
parent.removeChild(elt);
})
}
zotForm() {
console.debug('Fretboard#zotForm', this);
this.zotStrings();
}
#strings; #frets;
formChanged() {
console.debug('Fretboard#formChanged', this);
// TODO: this is inelegant. ideally, none of this stuff is
// triggered until the form is set, and doing it here is not
// robust.
const [strings, frets] =
[this.getAttribute('strings'), this.getAttribute('frets')].map(s => Number(s));
console.debug(' -- strings', strings, 'frets', frets);
if (strings && frets && strings !== this.#strings && frets != this.#frets) {
console.debug(' -- rerender table');
this.zotForm();
const tmpl = this.querySelector('template.string');
for (let i = 0; i < strings; i++) {
console.debug(' -- appending string', i, tmpl);
const item = tmpl.content.cloneNode(true);
console.debug(' -- item', item);
const tonic = openStrings[i];
item.querySelectorAll('[slot="string"]').forEach(s => {
console.debug(' -- setting tonic', tonic, 'on', s);
s.setAttribute('tonic', tonic);
s.setAttribute('value', tonic);
s.setAttribute('frets', frets.toString());
})
tmpl.parentNode.insertBefore(item, tmpl);
}
this.#frets = frets;
this.#strings = strings;
}
}
}
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