/* global window, document, jQuery */
// ==UserScript==
// @name         Pixiv hover zoom
// @namespace    https://github.com/rplus
// @version      1.1.2
// @description  hover zoom for Pixiv
// @author       Rplus
// @include      http://www.pixiv.net/*
// @grant        none
// ==/UserScript==
;(function(window, document, $) {
'use strict';
var phzw = $('#pixiv-hz-wrap');
var phzwPos = [];
var phzwPattern = /member_illust\.php\?mode=medium&illust_id=(\d+)/;
var phzwAPI = '//www.pixiv.net/rpc/index.php?mode=get_illust_detail_by_ids&illust_ids=';
var phzwAPICache = {};
var imgSize = 'm'; // size: '240mw', m', 'big'
var body = document.body;
var isAutoLoadNextPage = true;
var pager = {};
var phzwToggle = function(_switch) {
if (_switch) {
phzw.css({
'top': phzwPos[0],
'left': phzwPos[1],
'opacity': 1,
'visibility': 'visible',
'transform': 'translateX(' + phzwPos[2] + '%)'
});
} else {
if ('0' !== phzw[0].style.opacity) {
phzw.css({
'visibility': 'hidden',
'opacity': 0
});
}
}
};
var getAllId = function() {
var ids = [];
$.each($('#wrapper').find('a'), function() {
var _href = $(this).attr('href');
var _match = _href && _href.match(phzwPattern);
if (_match) {
ids.push(_match.pop());
}
});
return ids;
};
var pullIdsData = function(idsArr) {
var deferred = $.Deferred();
$.getJSON(phzwAPI + idsArr.join())
.done(function(data) {
if (!data.error) {
for (var _item in data.body) {
if (data.body.hasOwnProperty(_item)) {
phzwAPICache[_item] = data.body[_item];
}
}
deferred.resolve(); //update state
} else {
deferred.reject();
}
})
.fail(function() {
deferred.reject();
});
return deferred.promise();
};
var render = function(_id) {
var data = phzwAPICache[_id];
if (!data) { return; }
if (_id !== phzw.data('id')) {
var tpl = '<a href="/member_illust.php?mode=medium&illust_id=' + _id + '"><img src="' + data.url[imgSize] + '" title="' + data.illust_title + '"></a>';
phzw.html(tpl);
phzw.data('id', _id);
}
phzwToggle(true);
};
var updatePos = function(ele) {
var eleRect = ele.getBoundingClientRect();
phzwPos = [eleRect.top + body.scrollTop + eleRect.height, eleRect.left, -100 * eleRect.left / body.scrollWidth];
};
$(function() {
// phzw init
if (!phzw.length) {
$(body).append('<div id="pixiv-hz-wrap" />');
phzw = $('#pixiv-hz-wrap').css({
'position': 'absolute',
'visibility': 'hidden',
'opacity': 0,
'box-shadow': '0 0 0 3px #fff, 0 0 3px 3px',
'transition': 'all .3s',
'z-index': '1000'
});
phzw.on('mouseenter', function() {
phzw.one('mouseleave', function() {
phzwToggle(false);
});
});
}
// delay pre-load data in page
setTimeout(function() {
pullIdsData(getAllId());
}, 1000);
$('#wrapper').on('mouseenter.phzw', 'a', function(e) {
var _match = $(this).attr('href').match(phzwPattern);
if (!_match) { return; }
var _id = _match.pop();
e.stopPropagation();
updatePos(this);
if (phzwAPICache[_id]) {
render(_id);
} else {
$.when(pullIdsData([_id]))
.then(function() {
render(_id);
});
}
});
$(document).on('click.phzw', function() {
phzwToggle(false);
});
if (isAutoLoadNextPage) {
pager.container = $('.pager-container').eq(0);
if (!pager.container.length) { return; }
pager.current = pager.container.find('li.current').text();
pager.baseHref = pager.container.find('a')[0].href.replace(/&p=\d+/, '');
pager.parent = $('._image-items').eq(0).parent();
var autoLoadNextPage = function() {
var nextPage = pager.current * 1 + 1;
var nextPageHref = pager.baseHref + '&p=' + nextPage;
var separator = '<hr style="border: 1px dashed #ccc" /><a href="' + nextPageHref + '">::: page: ' + nextPage + '</a>';
if (nextPage > pager.max) {
$(window).off('scroll.autoLoadNextPage');
return;
}
// prepare a div container for ajax lond next-page content
$('<div />').appendTo( pager.parent.append(separator) )
.load(nextPageHref + ' ._image-items', function(_html) {
pager.current = nextPage;
pager.loading = false;
// check for max page
var nextPagerLists = _html.match(/pager-container.+?(<ul .+?<\/ul>)/).pop();
pager.max = $(nextPagerLists).find('li').last().text() * 1;
});
};
$(window).on('scroll.autoLoadNextPage', function() {
if (!pager.loading && (pager.parent[0].getBoundingClientRect().bottom < document.documentElement.clientHeight * .3)) {
pager.loading = true;
autoLoadNextPage();
}
});
}
$('.link-item').eq(0).prepend('<button>-♥ preload all ♥-</button>').find('button').on('click', function(e) {
e.preventDefault();
$.when(pullIdsData(getAllId()))
.then(function() {
$.each(phzwAPICache, function(key, val) {
// forcedly preload
$('<img src="' + val.url[imgSize] + '">');
});
});
});
});
})(window, document, jQuery, undefined);