/*
  CrudeDoc Java Script
  Copyright (c) 2015 - 2017 Christian Schoenebeck. All rights reserved.
  http://www.crudebyte.com
*/

var g_isTouch = false;
var g_isMouse = false;

function crdWindowWidth() {
    return window.innerWidth ||
           document.documentElement.clientWidth ||
           document.getElementsByTagName('body')[0].clientWidth;
}

function crdWindowHeight() {
    return window.innerHeight ||
           document.documentElement.clientHeight ||
           document.getElementsByTagName('body')[0].clientHeight;
}

function crdScrollTo(e) {
    $('html, body').animate({
        scrollTop: $( "#" + $(e).attr("section") ).offset().top - 68
    }, 300);
    var obj = $( "#" + $(e).attr("section") );
    $(obj).fadeIn(100).fadeOut(100).fadeIn(100).fadeOut(100).fadeIn(100).fadeOut(100).fadeIn(120).fadeOut(100).fadeIn(120);
}

function crdScrollToHash(h) {
    if (typeof h === 'undefined') {
        h = location.hash;
        if (!h || h.length < 2) return;
    }
    $('html, body').animate({
        scrollTop: $( h ).offset().top - 68
    }, 300);
    $(h).fadeIn(100).fadeOut(100).fadeIn(100).fadeOut(100).fadeIn(100).fadeOut(100).fadeIn(120).fadeOut(100).fadeIn(120);
}

function crdOnScroll() {
    //var headers = $("body > article :header:in-viewport");
    var headers = $("body > article :header");
    var wst = $(window).scrollTop();
    if (wst <= 0) {
        for (var i = 0; i < headers.length; ++i) {
            $("body > aside *[section]").removeClass("current");
            var link = $("body > aside *[section='" + headers[i].id + "']");
            $(link).addClass("current");
            return;
        }
    }
    var wh  = crdWindowHeight();
    for (var i = headers.length - 1; i >= 0; --i) {
        var offset = headers[i].offsetTop - wst + wh/2;
        if (headers[i].id.length > 0 && (offset <= 0 || offset <= wh)) {
            $("body > aside *[section]").removeClass("current");
            var link = $("body > aside *[section='" + headers[i].id + "']");
            $(link).addClass("current");
            break;
        }
    }
}

function crdUpdateTOCStatus() {
    var noTOC = $("html").hasClass("no-toc");
    $("nav > .foldbtn a").html(
        noTOC ? "&gt;&gt;&gt;" : "&lt;&lt;&lt;"
    );
    $("nav > .foldbtn a").attr("title",
        noTOC ? "Show content menu." : "Hide content menu."
    )
}

function crdToggleTOC() {
    $("html").toggleClass("no-toc");
    if (typeof(Storage) !== "undefined") {
        try {
            sessionStorage.setItem("show-toc", $("html").hasClass("no-toc") ? "no" : "yes");
        } catch (e) {}
    }
    crdUpdateTOCStatus();
}

function crdOnWindowResize() {
    var wh = crdWindowHeight();
    $("nav > ul > li ul").css("max-height", wh - 70);
}

function crdDetectFeatures() {
    if ('ontouchstart' in document.documentElement) {
        g_isTouch = true;
        document.documentElement.className += ' touch';
    } else {
        g_isTouch = false;
        document.documentElement.className += ' no-touch';
    }
    $(window).bind('mousemove.hasMouse', function(){
        $(window).unbind('.hasMouse');
        g_isMouse = true;
        $(document).tooltip();
    }).bind('touchstart.hasMouse', function(){
        $(window).unbind('.hasMouse');
        g_isMouse = false;
    });
    if ($.support["transform"]) {
        $("body").addClass("hasTransform");
    }
    var iOS = /iPad|iPhone|iPod/.test(navigator.userAgent) && !window.MSStream;
    if (iOS) {
        $("body").addClass("iOS");
    }
}

$(function() {
    crdDetectFeatures();
    $("article img[caption]").each(function() {
        $(this).after(
            "<div class='imgcptn'>" +
            $(this).attr("caption") + "</div>"
        );
    });
    $("body > aside *[section]").click(function(e) {
        //e.preventDefault();
        crdScrollTo(this);
        return false;
    });
    crdOnScroll();
    $(window).resize(function() {
        crdOnWindowResize();
    });
    if ("onhashchange" in window) {
        window.onhashchange = function() {
            crdScrollToHash();
        };
    }
    if (g_isTouch) {
        $("nav > ul > li").each(function() {
            $(this).click(function() {
                var active = $(this).hasClass("active");
                $("nav li.active").removeClass("active");
                if (!active)
                    $(this).addClass("active");
            });
        });
        $("article").click(function() {
            $("nav li.active").removeClass("active");
        });
    }
    $("article a[href]").each(function() {
        var href = $(this).attr("href");
        if (href && href.length > 1 && href.charAt(0) == '#') {
            $(this).click(function(e) {
                var anch = $(this).attr("href");
                crdScrollToHash(anch);
            });
        }
    });
    var showToc = null;
    if (typeof(Storage) !== "undefined") {
        try {
            var s = sessionStorage.getItem("show-toc");
            if (s)
                showToc = s != "no";
        } catch (e) {}
    }
    if (!$("body aside") || !$("body aside").length)
        showToc = false;
    if (showToc === null) {
        var w = crdWindowWidth();
        showToc = (w >= 1200);
    }
    $("html").addClass("no-effect");
    if (!showToc) {
        $("html").addClass("no-toc");
    }
    document.body.offsetHeight;
    $("html").removeClass("no-effect");
    crdUpdateTOCStatus();
});

$(document).ready(function() {
    crdOnWindowResize();
    crdScrollToHash();
});

var _crdScrollTimeout;

$(window).scroll(function() {
    crdOnScroll();
});