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define([
"jQuery",
"utils/url",
"core/events",
"core/state",
"core/progress",
"core/loading",
"core/search"
], function($, URL, events, state, progress, loading, search) {
var prev, next;
var usePushState = (typeof history.pushState !== "undefined");
var handleNavigation = function(relativeUrl, push) {
var url = URL.join(window.location.pathname, relativeUrl);
console.log("navigate to ", url, "baseurl="+relativeUrl, "current="+window.location.pathname);
if (!usePushState) {
// Refresh the page to the new URL if pushState not supported
location.href = relativeUrl;
return
}
return loading.show($.get(url)
.done(function (html) {
// Push url to history
if (push) history.pushState({ path: url }, null, url);
// Replace html content
html = html.replace( /<(\/?)(html|head|body)([^>]*)>/ig, function(a,b,c,d){
return '<' + b + 'div' + ( b ? '' : ' data-element="' + c + '"' ) + d + '>';
});
var $page = $(html);
var $pageHead = $page.find("[data-element=head]");
var $pageBody = $page.find('.book');
// Merge heads
var headContent = $pageHead.html()
$("head style").each(function() {
headContent = headContent + this.outerHTML
});
$("head").html(headContent);
// Merge body
var bodyClass = $(".book").attr("class");
var scrollPosition = $('.book-summary .summary').scrollTop();
$pageBody.toggleClass("with-summary", $(".book").hasClass("with-summary"))
$(".book").replaceWith($pageBody);
$(".book").attr("class", bodyClass);
$('.book-summary .summary').scrollTop(scrollPosition);
// Update state
state.update($("html"));
// recover search keyword
search.recover();
preparePage();
})
.fail(function (e) {
location.href = relativeUrl;
}));
};
var updateNavigationPosition = function() {
var bodyInnerWidth, pageWrapperWidth;
bodyInnerWidth = parseInt($('.body-inner').css('width'), 10);
pageWrapperWidth = parseInt($('.page-wrapper').css('width'), 10);
$('.navigation-next').css('margin-right', (bodyInnerWidth - pageWrapperWidth) + 'px');
};
var preparePage = function() {
var $bodyInner = $(".book-body .body-inner");
var $pageWrapper = $(".book-body .page-wrapper");
// Show progress
progress.show();
// Update navigation position
updateNavigationPosition();
// Focus on content
$pageWrapper.focus();
// Reset scroll
$bodyInner.scrollTop(0);
// Notify
events.trigger("page.change");
};
var handlePagination = function (e) {
e.stopPropagation();
e.preventDefault();
var url = $(this).attr('href');
if (url) handleNavigation(url, true);
};
var goNext = function() {
var url = $(".navigation-next").attr("href");
if (url) handleNavigation(url, true);
};
var goPrev = function() {
var url = $(".navigation-prev").attr("href");
if (url) handleNavigation(url, true);
};
var init = function() {
// Prevent cache so that using the back button works
// See: http://stackoverflow.com/a/15805399/983070
$.ajaxSetup({
cache: false
});
// Recreate first page when the page loads.
history.replaceState({ path: window.location.href }, '');
// Back Button Hijacking :(
window.onpopstate = function (event) {
if (event.state === null) {
return;
}
return handleNavigation(event.state.path, false);
};
$(document).on('click', ".navigation-prev", handlePagination);
$(document).on('click', ".navigation-next", handlePagination);
$(document).on('click', ".summary [data-path] a", handlePagination);
$(window).resize(updateNavigationPosition);
// Prepare current page
preparePage();
};
return {
init: init,
goNext: goNext,
goPrev: goPrev
};
});
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