mirror of
https://gitlab.com/parroquia-san-leandro/cancionero-web.git
synced 2024-12-22 16:53:34 +01:00
88 lines
2.9 KiB
JavaScript
88 lines
2.9 KiB
JavaScript
/* ===========================================
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FONT SIZE
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=========================================== */
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SIZE_STEPS = [30, 50, 67, 80, 90, 100, 110, 120, 133, 150, 170, 200, 240, 300];
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currSize = SIZE_STEPS.indexOf(100)
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/** Changes the size of the lyrics and chords. */
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function size(steps) {
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if (steps === 0) {
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currSize = SIZE_STEPS.indexOf(100);
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}
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currSize += steps;
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document.getElementById('wholeSongDiv').style.fontSize = SIZE_STEPS[currSize] + '%';
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}
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/* ===========================================
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TRANSPOSE CHORDS
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=========================================== */
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ENG_INDEX = {'C': 0, 'C#': 1, 'Db': 1, 'D': 2, 'D#': 3, 'Eb': 3, 'E': 4, 'Fb': 4, 'F': 5, 'E#': 5, 'F#': 6, 'Gb': 6, 'G': 7, 'G#': 8, 'Ab': 8, 'A': 9, 'A#': 10, 'Bb': 10, 'B': 11, 'Cb': 11, 'B#': 0}
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LAT_INDEX = {'Do': 0, 'Do#': 1, 'Reb': 1, 'Re': 2, 'Re#': 3, 'Mib': 3, 'Mi': 4, 'Fab': 4, 'Fa': 5, 'Mi#': 5, 'Fa#': 6, 'Solb': 6, 'Sol': 7, 'Sol#': 8, 'Lab': 8, 'La': 9, 'La#': 10, 'Sib': 10, 'Si': 11, 'Dob': 11, 'Si#': 0}
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CHORDS_LAT = ['Do', 'Do#', 'Re', 'Re#', 'Mi', 'Fa', 'Fa#', 'Sol', 'Sol#', 'La', 'Sib', 'Si']
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CHORDS_ENG = ['C', 'C#', 'D', 'D#', 'E', 'F', 'F#', 'G', 'G#', 'A', 'Bb', 'B']
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/** Changes all chords to a given semitone relative to the original */
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function transpose(n) {
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transposeAdd(n - getTranspose())
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}
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/** Transposes all chords by n steps */
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function transposeAdd(n) {
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for (c of document.getElementsByClassName('c')) {
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chord = c.innerHTML
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if (LAT_INDEX[chord] == undefined) {
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throw Error("Unknown chord: " + chord)
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}
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i = LAT_INDEX[chord]
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j = (i + n + 12) % 12
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c.innerHTML = CHORDS_LAT[j]
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}
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setTransposeSelector(getTranspose() + n)
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}
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function setTransposeSelector(n) {
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while (n > 6) {
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n -= 12
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}
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while (n < -6) {
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n += 12
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}
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ts = document.getElementById("transposeSelect")
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if (n > 0) {
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ts.value = "+" + n
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} else {
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ts.value = n
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}
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}
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function getTranspose() {
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return Number.parseInt(document.getElementById("transposeSelect").value)
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}
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/* ===========================================
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HIDE CHORDS
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=========================================== */
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// Init
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window.onload = function () {
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var show = localStorage.getItem("show_chords") == "true";
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showChords(show);
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document.getElementById("showChords").checked = show;
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};
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function showChords(show) {
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if (show || show == "true") {
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document.getElementById("songLyrics").style.display = "none";
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document.getElementById("songChords").style.display = "block";
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document.getElementById("transposeControls").style.display = "block";
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} else {
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document.getElementById("songLyrics").style.display = "block";
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document.getElementById("songChords").style.display = "none";
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document.getElementById("transposeControls").style.display = "none";
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}
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localStorage.setItem("show_chords", show);
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}
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