/* ================================================================================
 * document.js v1.0
 * http://git.shemic.com/dever/script
 * ================================================================================
 * Copyright 2017-2018 Dever(dever.cc)
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 * ================================================================================
 */

//文档工具包
var Document = 
{
    option : {},
    reader : '#document',
    show : 1,
    page : 0,
    width : 0,
    Init : function(option)
    {
        var self = this;
        self.Option(option);
        $.getJSON(self.option.document + '&callback=?', function(t)
        {
            $(self.option.reader).html(t.msg);

            self.width = $(self.option.reader).width();
            if (self.option.tool) {
                self.Tool();
            }

            self.Border();
            self.Scroll();

            $('.pf').each(function(i)
            {
                if (i < self.show) {
                    self.Load(i);
                }
            });
        });
    }

    ,Load : function(i)
    {
        var self = this;
        self.page = i;
        var doc = $('.pf').eq(i);
        var url = doc.attr('data-page-url');
        var parent = doc.parent();
        $.getJSON(url + '&callback=?', function(t)
        {
            doc.prop('outerHTML', t.msg).show();
            var e = $('.pf').eq(i);
            var w = e.find('.w0').width();
            if (w > self.width) {
                var z = 100 - ((w - self.width)/10);
                $(self.option.reader).css('zoom', z + '%');
                self.width = w;
            }
            
        });
    }

    ,Option : function(option)
    {
        this.option = option;
        if (!this.option.border) {
            this.option.border = 'yes';
        }

        if (this.option.reader) {
            this.reader = this.option.reader;
        }

        if (this.option.show) {
            this.show = this.option.show;
        }
    }

    ,Border : function() {
        if (this.option.border == 'no') {
            $(this.option.reader).find('style').append('<style>.pf{border:0px;width:100%;}</style>');
        }
    }

    ,Tool : function()
    {
        var html = '<div class="document-toolsbar-mod" style="visibility: visible;width: 98.2%; position: static;margin-top: 10px;margin-left: 8px;margin-bottom: -14px;"><div class="document-toolsbar-inner"><div class="document-toolsbar-content"><div class="document-toolsbar-nav" style="margin-left: 230px;"><a class="document-toolsbar-top" href="###" style="visibility: visible;"><b>top</b></a><input class="document-toolsbar-input" type="text" value="" style="visibility: visible;"><span class="document-toolsbar-pageCount" style="visibility: visible;">&nbsp;/&nbsp;3</span><a class="document-toolsbar-bottom" href="###" style="visibility: visible;"><b>bottom</b></a></div><div class="document-toolsbar-zoom"><a class="document-toolsbar-zoomin" href="###" style="visibility: visible;">zoom in</a><a class="document-toolsbar-zoomout" href="###" style="visibility: visible;">zoom out</a></div></div></div></div></div>';
        $('#page-container').prepend(html);
        this.Scoll();
    }

    ,Scroll : function()
    {
        var self = this;
        var total = $('.pf').length;

        if (self.option.more) {

            if (self.page > total) {
                $(self.option.more).hide();
            } else {
                $(self.option.more).show();
                $(self.option.more).click(function()
                {
                    var p = self.page;
                    for (var i = 1; i <= self.show; i++) {
                        var page = p + i;
                        self.MorePage(total-1, page);
                        self.Load(page);
                    }
                });
                self.MorePage(total, self.show);
            }
        } else {
            $(window).scroll(function(){
                var scroll = $(window).scrollTop();
                var height = self.Height();
                if (scroll >= height && self.page < total) {
                    var page = self.page + 1;
                    self.Load(page);
                }
            });
        }
    }

    ,MorePage : function(total, page)
    {
        var num = total-page;
        if (num <= 0) {
            $(this.option.more).hide();
        }
        $(this.option.more + '_page').html(num);
    }

    ,Height : function()
    {
        var height = 0;
        for (var i = 0; i < this.page; i++) {
            height += $('.pf').eq(i).height();
        }
        return height;
    }
};