Edited for FR guitar

static/fonts/liberation-fonts-ttf-2.1.5/AUTHORS

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+AUTHORS
+
+Current Contributors (sorted alphabetically):
+  
+  - Vishal Vijayraghavan  <vishalvvr at fedoraproject dot org>
+      Project Owner/ Maintainer (Current)
+      Red Hat, Inc.
+
+Previous Contributors
+  - Pravin Satpute  <psatpute at redhat dot com>
+      Project Owner/ Maintainer 
+      Red Hat, Inc.
+      
+  - Steve Matteson
+      Original Designer
+      Ascender, Inc.

static/fonts/liberation-fonts-ttf-2.1.5/LICENSE

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+Digitized data copyright (c) 2010 Google Corporation
+	with Reserved Font Arimo, Tinos and Cousine.
+Copyright (c) 2012 Red Hat, Inc.
+	with Reserved Font Name Liberation.
+
+This Font Software is licensed under the SIL Open Font License,
+Version 1.1.
+
+This license is copied below, and is also available with a FAQ at:
+http://scripts.sil.org/OFL
+
+SIL OPEN FONT LICENSE Version 1.1 - 26 February 2007
+
+PREAMBLE The goals of the Open Font License (OFL) are to stimulate
+worldwide development of collaborative font projects, to support the font
+creation efforts of academic and linguistic communities, and to provide
+a free and open framework in which fonts may be shared and improved in
+partnership with others.
+
+The OFL allows the licensed fonts to be used, studied, modified and
+redistributed freely as long as they are not sold by themselves.
+The fonts, including any derivative works, can be bundled, embedded,
+redistributed and/or sold with any software provided that any reserved
+names are not used by derivative works.  The fonts and derivatives,
+however, cannot be released under any other type of license.  The
+requirement for fonts to remain under this license does not apply to
+any document created using the fonts or their derivatives.
+
+ 
+
+DEFINITIONS
+"Font Software" refers to the set of files released by the Copyright
+Holder(s) under this license and clearly marked as such.
+This may include source files, build scripts and documentation.
+
+"Reserved Font Name" refers to any names specified as such after the
+copyright statement(s).
+
+"Original Version" refers to the collection of Font Software components
+as distributed by the Copyright Holder(s).
+
+"Modified Version" refers to any derivative made by adding to, deleting,
+or substituting ? in part or in whole ?
+any of the components of the Original Version, by changing formats or
+by porting the Font Software to a new environment.
+
+"Author" refers to any designer, engineer, programmer, technical writer
+or other person who contributed to the Font Software.
+
+
+PERMISSION & CONDITIONS
+
+Permission is hereby granted, free of charge, to any person obtaining a
+copy of the Font Software, to use, study, copy, merge, embed, modify,
+redistribute, and sell modified and unmodified copies of the Font
+Software, subject to the following conditions:
+
+1) Neither the Font Software nor any of its individual components,in
+   Original or Modified Versions, may be sold by itself.
+
+2) Original or Modified Versions of the Font Software may be bundled,
+   redistributed and/or sold with any software, provided that each copy
+   contains the above copyright notice and this license. These can be
+   included either as stand-alone text files, human-readable headers or
+   in the appropriate machine-readable metadata fields within text or
+   binary files as long as those fields can be easily viewed by the user.
+
+3) No Modified Version of the Font Software may use the Reserved Font
+   Name(s) unless explicit written permission is granted by the
+   corresponding Copyright Holder. This restriction only applies to the
+   primary font name as presented to the users.
+
+4) The name(s) of the Copyright Holder(s) or the Author(s) of the Font
+   Software shall not be used to promote, endorse or advertise any
+   Modified Version, except to acknowledge the contribution(s) of the
+   Copyright Holder(s) and the Author(s) or with their explicit written
+   permission.
+
+5) The Font Software, modified or unmodified, in part or in whole, must
+   be distributed entirely under this license, and must not be distributed
+   under any other license. The requirement for fonts to remain under
+   this license does not apply to any document created using the Font
+   Software.
+
+
+ 
+TERMINATION
+This license becomes null and void if any of the above conditions are not met.
+
+ 
+
+DISCLAIMER
+THE FONT SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO ANY WARRANTIES OF
+MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
+OF COPYRIGHT, PATENT, TRADEMARK, OR OTHER RIGHT.  IN NO EVENT SHALL THE
+COPYRIGHT HOLDER BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+INCLUDING ANY GENERAL, SPECIAL, INDIRECT, INCIDENTAL, OR CONSEQUENTIAL
+DAMAGES, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+FROM, OUT OF THE USE OR INABILITY TO USE THE FONT SOFTWARE OR FROM OTHER
+DEALINGS IN THE FONT SOFTWARE.
+

static/js/filter.js

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+const filters  = document.querySelector(".filters");
+const buttons  = Array.from(filters.querySelectorAll(".button"));
+const search   = document.querySelector("input[type='search']");
+const form     = document.querySelector("form");
+const songList = document.querySelector(".song-list");
+
+let selectedCategory = null;
+
+function buttonToggle(clickedButton) {
+	buttons.forEach(button => {
+		if (button === clickedButton && !button.classList.contains("selected")) {
+			button.classList.add("selected");
+			selectedCategory = button.dataset.category;
+		} else {
+			button.classList.remove("selected");
+			if (button.dataset.category == selectedCategory) selectedCategory = null;
+		}
+	});
+	filterSongs();
+}
+
+function filterSongs() {
+	const searchTerm = search.value.trim().toLowerCase().normalize("NFD").replace(/\p{Diacritic}/gu, "");
+	const songs = Array.from(songList.children);
+	songs.forEach(song => {
+		const title = song.dataset.title.toLowerCase().normalize("NFD").replace(/\p{Diacritic}/gu, "");
+		const matching = title.includes(searchTerm) && (!selectedCategory || song.dataset.category === selectedCategory);
+		song.classList.toggle("hidden", !matching);
+	});
+}
+
+// Event listeners
+search.addEventListener("input", filterSongs);
+// Filtering happens before the reset itself without this timeout
+form.addEventListener("reset", () => setTimeout(filterSongs, 0));
+buttons.forEach(button => button.addEventListener("click", () => buttonToggle(button)));
+
+// Normalize song titles
+Array.from(songList.children).forEach(song => {
+	song.dataset.title = song.dataset.title.toLowerCase().normalize("NFD").replace(/\p{Diacritic}/gu, "");
+});
+
+// Display the filter section on JS-enabled browsers
+window.addEventListener("load", () => filters.classList.remove = "hidden");

static/js/song-controls.js

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+const controls = document.querySelector(".controls");
+const song = document.querySelector("iframe.song").contentWindow;
+
+// Autoscroll
+var scroll;
+function pageScroll() {
+	song.scrollBy(0, 1);
+	scroll = setTimeout(pageScroll, 80);
+}
+
+document.querySelector("#autoscroll").addEventListener("click", function() {
+	if (this.classList.contains("active")) {
+		clearTimeout(scroll);
+	} else {
+		pageScroll();
+	}
+	this.classList.toggle("active");
+});
+
+// Scaling
+function pageScale(value) {
+	if (value === 0) {
+		song.document.body.style.transform = "scale(1)";
+		return;
+	}
+	const currentScale = parseFloat(song.document.body.style.transform.split("scale(")[1]) || 1;
+	song.document.body.style.transform = "scale(" + (currentScale + value) + ")";
+}
+
+controls.querySelector("#font-size-increase").addEventListener("click", () => pageScale(0.1));
+controls.querySelector("#font-size-decrease").addEventListener("click", () => pageScale(-0.1));
+controls.querySelector("#font-size-reset").addEventListener("click", () => pageScale(0));
+
+// Display the controls on JS-enabled browsers
+window.addEventListener("load", () => controls.classList.remove = "hidden");