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422 lines
11 KiB
422 lines
11 KiB
/*
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* artZoom 1.0.7
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* Date: 2011-06-22
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* (c) 2009-2011 TangBin, http://www.planeArt.cn
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*
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* This is licensed under the GNU LGPL, version 2.1 or later.
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* For details, see: http://creativecommons.org/licenses/LGPL/2.1/
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*/
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(function (document, $, log) {
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$.fn.artZoom = function (config) {
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config = $.extend({}, $.fn.artZoom.defaults, config);
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var tmpl, viewport,
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$this = this,
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loadImg = {},
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path = config.path,
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loading = path + '/loading.gif',
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max = path + '/zoomin.cur',
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min = path + '/zoomout.cur';
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new Image().src = loading;
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max = 'url(\'' + max + '\'), pointer';
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min = 'url(\'' + min + '\'), pointer';
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tmpl = [
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'<div class="ui-artZoom-toolbar" style="display:none">',
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'<span class="ui-artZoom-buttons" style="display:none">',
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'<a href="#" data-go="left" class="ui-artZoom-left"><span></span>',
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config.left,
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'</a>',
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'<a href="#" data-go="right" class="ui-artZoom-right"><span></span>',
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config.right,
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'</a>',
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'<a href="#" data-go="source" class="ui-artZoom-source"><span></span>',
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config.source,
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'</a>',
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'<a href="#" data-go="hide" class="ui-artZoom-hide"><span></span>',
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config.hide,
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'</a>',
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'</span>',
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'<span class="ui-artZoom-loading">',
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'<img data-live="stop" src="',
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loading,
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'" style="',
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'display:inline-block;*zoom:1;*display:inline;vertical-align:middle;',
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'width:16px;height:16px;"',
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' />',
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' <span>Loading..</span>',
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'</span>',
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'</div>',
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'<div class="ui-artZoom-box" style="display:none">',
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'<span class="ui-artZoom-photo" data-go="hide"',
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' style="display:inline-block;*display:inline;*zoom:1;overflow:hidden;position:relative;cursor:',
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min,
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'">',
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'<img data-name="thumb" data-go="hide" data-live="stop" src="',
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loading,
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'" />',
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'</span>',
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'</div>'
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].join('');
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// jQuery事件代理
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this.live('click', function (event) {
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if (this.nodeName !== 'IMG' && this.getAttribute('data-live') === 'stop') return false;
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var $artZoom, buttonClick,
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that = this,
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$this = $(that),
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$parent = $this.parent(),
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src = that.src,
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show = $this.attr('data-artZoom-show') || src,
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source = $this.attr('data-artZoom-source') || show,
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maxWidth = config.maxWidth || ($parent[0].nodeName === 'A' ? $this.parent() : $this).parent().width(),
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maxHeight = config.maxHeight || 99999;
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maxWidth = maxWidth - config.borderWidth;
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// 对包含在链接内的图片进行特殊处理
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if ($parent[0].nodeName === 'A') {
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show = $parent.attr('data-artZoom-show') || $parent.attr('href');
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source = $parent.attr('data-artZoom-source') || $parent.attr('rel');
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};
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// 第一次点击
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if (!$this.data('artZoom')) {
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var wrap = document.createElement('div'),
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$thumb, $box, $show;
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$artZoom = $(wrap);
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wrap.className = 'ui-artZoom ui-artZoom-noLoad';
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wrap.innerHTML = tmpl;
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($parent[0].nodeName === 'A' ? $this.parent() : $this).before(wrap);
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$this.data('artZoom', $artZoom);
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$box = $artZoom.find('.ui-artZoom-box');
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$thumb = $artZoom.find('[data-name=thumb]');
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// 快速获取大图尺寸
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imgReady(show, function () {
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var width = this.width,
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height = this.height,
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maxWidth2 = Math.min(maxWidth, width);
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height = maxWidth2 / width * height;
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width = maxWidth2;
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// 插入大图并使用逐渐清晰加载的效果
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$thumb.attr('src', src).
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css(config.blur ? {
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width: width + 'px',
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height: height + 'px'
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} : {display: 'none'}).
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after([
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'<img class="ui-artZoom-show" title="',
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that.title,
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'" alt="',
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that.alt,
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'" src="',
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show,
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'" style="width:',
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width,
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'px;height:',
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height, // IE8 超长图片height属性失效BUG，改用CSS
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'px;position:absolute;left:0;top:0;background:transparent"',
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' />'
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].join(''));
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$show = $artZoom.find('.ui-artZoom-show');
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$thumb.attr('class', 'ui-artZoom-show');
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$artZoom.addClass('ui-artZoom-ready');
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$artZoom.find('.ui-artZoom-buttons').show();
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$this.data('artZoom-ready', true);
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$this.hide();
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$box.show();
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// 大图完全加载完毕
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}, function () {
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$thumb.removeAttr('class').hide();
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$show.css({
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position: 'static',
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left: 'auto',
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top: 'auto'
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});
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$artZoom.removeClass('ui-artZoom-noLoad');
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$artZoom.find('.ui-artZoom-loading').hide();
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$this.data('artZoom-load', true);
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// 图片加载错误
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}, function () {
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$artZoom.addClass('ui-artZoom-error');
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log('jQuery.fn.artZoom: Load "' + show + '" Error!');
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});
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} else {
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$this.hide();
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};
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$artZoom = $this.data('artZoom');
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buttonClick = function (event) {
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var target = this,
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go = target.getAttribute('data-go'),
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live = target.getAttribute('data-live'),
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degree = $this.data('artZoom-degree') || 0,
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elem = $artZoom.find('.ui-artZoom-show')[0];
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if (live === 'stop') return false;
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if (/img|canvas$/i.test(target.nodeName)) go = 'hide';
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switch (go) {
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case 'left':
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degree -= 90;
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degree = degree === -90 ? 270 : degree;
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break;
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case 'right':
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degree += 90;
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degree = degree === 360 ? 0 : degree;
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break;
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case 'source':
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window.open(source || show || src);
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break;
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case 'hide':
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$this.show();
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$artZoom.find('.ui-artZoom-toolbar').hide();
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$artZoom.hide();
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$artZoom.find('[data-go]').die('click', buttonClick);
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break;
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};
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if ((go === 'left' || go === 'right') && $this.data('artZoom-load')) {
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imgRotate(elem, degree, maxWidth, maxHeight);
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$this.data('artZoom-degree', degree);
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};
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return false;
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};
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$artZoom.show().find('.ui-artZoom-toolbar').slideDown(150);
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$artZoom.find('[data-go]').live('click', buttonClick);
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return false;
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});
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// 给目标缩略图应用外部指针样式
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this.live('mouseover', function () {
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if (this.className !== 'ui-artZoom-show') this.style.cursor = max;
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});
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// 预加载指针形状图标
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if (this[0]) this[0].style.cursor = max;
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return this;
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};
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$.fn.artZoom.defaults = {
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path: './images',
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left: '\u5de6\u65cb\u8f6c',
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right: '\u53f3\u65cb\u8f6c',
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source: '\u770b\u539f\u56fe',
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hide: '\xd7',
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blur: true,
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preload: true,
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maxWidth: null,
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maxHeight: null,
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borderWidth: 18
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};
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/**
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* 图片旋转
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* @version 2011.05.27
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* @author TangBin
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* @param {HTMLElement} 图片元素
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* @param {Number} 旋转角度 (可用值: 0, 90, 180, 270)
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* @param {Number} 最大宽度限制
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* @param {Number} 最大高度限制
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*/
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var imgRotate = $.imgRotate = function () {
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var eCanvas = '{$canvas}',
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isCanvas = !!document.createElement('canvas').getContext;
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return function (elem, degree, maxWidth, maxHeight) {
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var x, y, getContext,
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resize = 1,
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width = elem.naturalWidth,
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height = elem.naturalHeight,
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canvas = elem[eCanvas];
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// 初次运行
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if (!elem[eCanvas]) {
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// 获取图像未应用样式的真实大小 (IE和Opera早期版本)
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if (!('naturalWidth' in elem)) {
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var run = elem.runtimeStyle, w = run.width, h = run.height;
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run.width = run.height = 'auto';
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elem.naturalWidth = width = elem.width;
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elem.naturalHeight = height = elem.height;
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run.width = w;
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run.height = h;
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};
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elem[eCanvas] = canvas = document.createElement(isCanvas ? 'canvas' : 'span');
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elem.parentNode.insertBefore(canvas, elem.nextSibling);
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elem.style.display = 'none';
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canvas.className = elem.className;
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canvas.title = elem.title;
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if (!isCanvas) {
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canvas.img = document.createElement('img');
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canvas.img.src = elem.src;
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canvas.appendChild(canvas.img);
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canvas.style.cssText = 'display:inline-block;*zoom:1;*display:inline;' +
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// css reset
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'padding:0;margin:0;border:none 0;position:static;float:none;overflow:hidden;width:auto;height:auto';
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};
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};
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var size = function (isSwap) {
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if (isSwap) width = [height, height = width][0];
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if (width > maxWidth) {
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resize = maxWidth / width;
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height = resize * height;
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width = maxWidth;
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};
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if (height > maxHeight) {
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resize = resize * maxHeight / height;
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width = maxHeight / height * width;
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height = maxHeight;
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};
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if (isCanvas) (isSwap ? height : width) / elem.naturalWidth;
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};
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switch (degree) {
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case 0:
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x = 0;
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y = 0;
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size();
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break;
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case 90:
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x = 0;
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y = -elem.naturalHeight;
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size(true);
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break;
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case 180:
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x = -elem.naturalWidth;
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y = -elem.naturalHeight
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size();
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break;
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case 270:
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x = -elem.naturalWidth;
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y = 0;
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size(true);
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break;
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};
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if (isCanvas) {
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canvas.setAttribute('width', width);
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canvas.setAttribute('height', height);
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getContext = canvas.getContext('2d');
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getContext.rotate(degree * Math.PI / 180);
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getContext.scale(resize, resize);
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getContext.drawImage(elem, x, y);
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} else {
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canvas.style.width = width + 'px';
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canvas.style.height = height + 'px';// 解决IE8使用滤镜后高度不能自适应
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canvas.img.style.filter = 'progid:DXImageTransform.Microsoft.BasicImage(rotation=' + degree / 90 + ')';
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canvas.img.width = elem.width * resize;
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canvas.img.height = elem.height * resize;
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};
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};
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}();
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/**
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* 图片头数据加载就绪事件 - 更快获取图片尺寸
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* @version 2011.05.27
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* @author TangBin
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* @see http://www.planeart.cn/?p=1121
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* @param {String} 图片路径
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* @param {Function} 尺寸就绪
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* @param {Function} 加载完毕 (可选)
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* @param {Function} 加载错误 (可选)
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* @example imgReady('http://www.google.com.hk/intl/zh-CN/images/logo_cn.png', function () {
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alert('size ready: width=' + this.width + '; height=' + this.height);
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});
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*/
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var imgReady = (function () {
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var list = [], intervalId = null,
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// 用来执行队列
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tick = function () {
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var i = 0;
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for (; i < list.length; i++) {
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list[i].end ? list.splice(i--, 1) : list[i]();
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};
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!list.length && stop();
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},
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// 停止所有定时器队列
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stop = function () {
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clearInterval(intervalId);
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intervalId = null;
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};
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return function (url, ready, load, error) {
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var onready, width, height, newWidth, newHeight,
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img = new Image();
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img.src = url;
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// 如果图片被缓存，则直接返回缓存数据
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if (img.complete) {
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ready.call(img);
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load && load.call(img);
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return;
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};
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width = img.width;
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height = img.height;
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// 加载错误后的事件
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img.onerror = function () {
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error && error.call(img);
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onready.end = true;
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img = img.onload = img.onerror = null;
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};
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// 图片尺寸就绪
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onready = function () {
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newWidth = img.width;
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newHeight = img.height;
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if (newWidth !== width || newHeight !== height ||
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// 如果图片已经在其他地方加载可使用面积检测
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newWidth * newHeight > 1024
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) {
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ready.call(img);
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onready.end = true;
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};
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};
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onready();
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// 完全加载完毕的事件
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img.onload = function () {
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// onload在定时器时间差范围内可能比onready快
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// 这里进行检查并保证onready优先执行
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!onready.end && onready();
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load && load.call(img);
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// IE gif动画会循环执行onload，置空onload即可
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img = img.onload = img.onerror = null;
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};
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// 加入队列中定期执行
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if (!onready.end) {
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list.push(onready);
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// 无论何时只允许出现一个定时器，减少浏览器性能损耗
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if (intervalId === null) intervalId = setInterval(tick, 40);
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};
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};
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})();
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}(document, jQuery, function (msg) {window.console && console.log(msg)}));
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