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/* jslint browser:true */
/* global body, options */
"use strict";
document.addEventListener("DOMContentLoaded", function(){
var menu = function (ev) {
var target = ev.target;
if (target.tagName.toLowerCase() === "span") {
target = target.parentNode;
}
var id = target.id;
if (!id) {
ev.stopPropagation();
return;
}
if (body.classList.contains(id)) {
body.classList.remove(id);
body.classList.remove("sidebar-active");
document.activeElement.blur();
} else if (body.classList.contains("sidebar-active")) {
var other = null;
for (var i = 0; i < body.classList.length; i+=1) {
if (body.classList.item(i) !== id &&
body.classList.item(i) !== "sidebar-active") {
other = body.classList.item(i);
break;
}
}
body.classList.remove(other);
body.classList.add(id);
} else {
body.classList.add(id);
body.classList.add("sidebar-active");
}
ev.stopPropagation();
options.classname = body.className;
localStorage.setItem("options", JSON.stringify(options));
};
var settings = function(attr, dir, amount) {
var chapter = document.getElementsByClassName("chapter")[0];
var cursize = parseInt(window.getComputedStyle(chapter)[attr]);
chapter.style[attr] = cursize + dir*amount + "px";
};
var contrast = function() {
var main = document.getElementsByClassName("main")[0];
var curcolor = window.getComputedStyle(main).color;
if (curcolor === "rgb(51, 51, 51)") {
main.style.color = "white";
main.style.backgroundColor = "#222";
} else {
main.style.color = "#333";
main.style.backgroundColor = "white";
}
};
var align = function(dir) {
var chapter = document.getElementsByClassName("chapter")[0];
chapter.style.textAlign = dir;
};
var option = function(el, name) {
return function() {
options[name] = el.checked;
localStorage.setItem("options", JSON.stringify(options));
};
};
document.getElementsByClassName("menu")[0].addEventListener("click", menu);
document.getElementById("font-minus").addEventListener("click", function() {
settings("fontSize", -1, 2);
});
document.getElementById("font-plus").addEventListener("click", function() {
settings("fontSize", 1, 2);
});
document.getElementById("line-minus").addEventListener("click", function() {
settings("lineHeight", -1, 4);
});
document.getElementById("line-plus").addEventListener("click", function() {
settings("lineHeight", 1, 4);
});
document.getElementById("width-minus").addEventListener("click", function() {
settings("maxWidth", -1, 50);
});
document.getElementById("width-plus").addEventListener("click", function() {
settings("maxWidth", 1, 50);
});
document.getElementById("contrast").addEventListener("click", contrast);
document.getElementById("left").addEventListener("click", function() {
align("left");
});
document.getElementById("justify").addEventListener("click", function() {
align("justify");
});
var main = document.getElementsByClassName("main")[0];
main.addEventListener("click", function() {
if (options.click) {
body.className = "";
options.classname = body.className;
localStorage.setItem("options", JSON.stringify(options));
}
});
window.addEventListener("scroll", function() {
if (!options.position) {
return;
} else {
options.positions[window.location.pathname] = this.scrollY;
localStorage.setItem("options", JSON.stringify(options));
}
});
if(options.position && options.positions[window.location.pathname]) {
window.scrollTo(0, options.positions[window.location.pathname]);
}
var labels = document.getElementsByClassName("option");
for (var i = 0; i < labels.length; i+=1) {
var label = labels[i];
var input = label.getElementsByTagName("input")[0];
input.checked = options[label.dataset.name];
label.addEventListener("click", option(input, label.dataset.name));
}
var cur_path = window.location.pathname;
var contents = document.getElementsByClassName("contents")[0];
var chapters = contents.getElementsByTagName("li");
for (i = 0; i < chapters.length; i+=1) {
var anchor = chapters[i].getElementsByTagName("a")[0];
if (anchor.pathname === cur_path) {
chapters[i].classList.add("active");
}
}
});
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