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79 changes: 60 additions & 19 deletions src/theme/book.js
Original file line number Diff line number Diff line change
Expand Up @@ -19,15 +19,16 @@ window.onunload = function () { };
})();

(function sidebar() {
var html = document.querySelector("html");
var body = document.querySelector("body");
var sidebar = document.getElementById("sidebar");
var sidebarLinks = document.querySelectorAll('#sidebar a');
var sidebarToggleButton = document.getElementById("sidebar-toggle");
var sidebarResizeHandle = document.getElementById("sidebar-resize-handle");
var firstContact = null;

function showSidebar() {
html.classList.remove('sidebar-hidden')
html.classList.add('sidebar-visible');
body.classList.remove('sidebar-hidden')
body.classList.add('sidebar-visible');
Array.from(sidebarLinks).forEach(function (link) {
link.setAttribute('tabIndex', 0);
});
Expand All @@ -37,8 +38,8 @@ window.onunload = function () { };
}

function hideSidebar() {
html.classList.remove('sidebar-visible')
html.classList.add('sidebar-hidden');
body.classList.remove('sidebar-visible')
body.classList.add('sidebar-hidden');
Array.from(sidebarLinks).forEach(function (link) {
link.setAttribute('tabIndex', -1);
});
Expand All @@ -49,9 +50,14 @@ window.onunload = function () { };

// Toggle sidebar
sidebarToggleButton.addEventListener('click', function sidebarToggle() {
if (html.classList.contains("sidebar-hidden")) {
if (body.classList.contains("sidebar-hidden")) {
var current_width = parseInt(
document.documentElement.style.getPropertyValue('--sidebar-width'), 10);
if (current_width < 150) {
document.documentElement.style.setProperty('--sidebar-width', '150px');
}
showSidebar();
} else if (html.classList.contains("sidebar-visible")) {
} else if (body.classList.contains("sidebar-visible")) {
hideSidebar();
} else {
if (getComputedStyle(sidebar)['transform'] === 'none') {
Expand All @@ -62,6 +68,32 @@ window.onunload = function () { };
}
});

sidebarResizeHandle.addEventListener('mousedown', initResize, false);

function initResize(e) {
window.addEventListener('mousemove', resize, false);
window.addEventListener('mouseup', stopResize, false);
body.classList.add('sidebar-resizing');
}
function resize(e) {
var pos = (e.clientX - sidebar.offsetLeft);
if (pos < 20) {
hideSidebar();
} else {
if (body.classList.contains("sidebar-hidden")) {
showSidebar();
}
pos = Math.min(pos, window.innerWidth - 100);
document.documentElement.style.setProperty('--sidebar-width', pos + 'px');
}
}
//on mouseup remove windows functions mousemove & mouseup
function stopResize(e) {
body.classList.remove('sidebar-resizing');
window.removeEventListener('mousemove', resize, false);
window.removeEventListener('mouseup', stopResize, false);
}

document.addEventListener('touchstart', function (e) {
firstContact = {
x: e.touches[0].clientX,
Expand All @@ -86,32 +118,41 @@ window.onunload = function () { };
firstContact = null;
}
}, { passive: true });

// Scroll sidebar to current active section
var activeSection = sidebar.querySelector(".active");
if (activeSection) {
sidebar.scrollTop = activeSection.offsetTop;
}
})();

(function chapterNavigation() {
document.addEventListener('keydown', function (e) {
if (e.altKey || e.ctrlKey || e.metaKey || e.shiftKey) { return; }
if (window.search && window.search.hasFocus()) { return; }
var html = document.querySelector('html');

function next() {
var nextButton = document.querySelector('.nav-chapters.next');
if (nextButton) {
window.location.href = nextButton.href;
}
}
function prev() {
var previousButton = document.querySelector('.nav-chapters.previous');
if (previousButton) {
window.location.href = previousButton.href;
}
}
switch (e.key) {
case 'ArrowRight':
e.preventDefault();
var nextButton = document.querySelector('.nav-chapters.next');
if (nextButton) {
window.location.href = nextButton.href;
if (html.dir == 'rtl') {
prev();
} else {
next();
}
break;
case 'ArrowLeft':
e.preventDefault();
var previousButton = document.querySelector('.nav-chapters.previous');
if (previousButton) {
window.location.href = previousButton.href;
if (html.dir == 'rtl') {
next();
} else {
prev();
}
break;
}
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