/**
 * reflection.js v1.9
 * http://cow.neondragon.net/stuff/reflection/
 * Freely distributable under MIT-style license.
 */


//border
var dispHeight = 0.4;

// timeout
var reflection_timeout = 5000;
 
/* From prototype.js */
if (!document.myGetElementsByClassName) {
	document.myGetElementsByClassName = function(className) {
		var children = document.getElementsByTagName('*') || document.all;
		var elements = new Array();
	  
		for (var i = 0; i < children.length; i++) {
			var child = children[i];
			var classNames = child.className.split(' ');
			for (var j = 0; j < classNames.length; j++) {
				if (classNames[j] == className) {
					elements.push(child);
					break;
				}
			}
		}
		return elements;
	}
}

var Reflection = {
	defaultHeight : 0.5,
	defaultOpacity: 0.8,
	defaultDispHeight : 0.8,
	
	add: function(imgId, options, i, div, url, date, retry, icon_src) {
		var id = 'ref' + (i+1);
		
//		Reflection.remove(image);
		
		doptions = { "height" : Reflection.defaultHeight, "opacity" : Reflection.defaultOpacity, "disp_height" : Reflection.defaultDispHeight}
		if (options) {
			for (var optioni in doptions) {
				if (!options[optioni]) {
					options[optioni] = doptions[optioni];
				}
			}
		} else {
			options = doptions;
		}
	
		try {
			
			var d;
			if(div){
				d = document.getElementById(div);
			}
			else{
				d = document.createElement('div');
				d.id = 'disc_div' + (i+1);
			}
			var p = document.getElementById(imgId);
			var image = p;
			
			var img_icon = document.createElement('img');
			img_icon.className = 'discovery_icon';
			img_icon.src = icon_src;
			
			var classes = p.className.split(' ');
			var newClasses = '';
			for (j=0;j<classes.length;j++) {
				if (classes[j] != "reflect") {
					if (newClasses) {
						newClasses += ' '
					}
					newClasses += classes[j];
				}
			}

			var reflectionHeight = Math.floor(p.height*options['height']);
			var divHeight = Math.floor(p.height*(1+options['height']));
			
			var reflectionWidth = p.width;
			
			//IE用
			if (document.all && !window.opera) {
				/* Copy original image's classes & styles to div */
				if(!div){
//					d.className = newClasses;
				}

/*				
				var reflection = document.createElement('img');
				reflection.id = id;
				reflection.src = p.src;
				reflection.className = 'discovery_canvas';
				reflection.style.width = reflectionWidth+'px';
				reflection.style.display = 'block';
				reflection.style.height = (p.height * options['disp_height']) +"px";
				
				reflection.style.marginBottom = "-"+(p.height-reflectionHeight)+'px';
				reflection.style.filter = 'flipv progid:DXImageTransform.Microsoft.Alpha(opacity='+(options['opacity']*100)+', style=1, finishOpacity=0, startx=0, starty=0, finishx=0, finishy='+(options['height']*100)+')';
*/				
				if(!div){
					d.style.width = reflectionWidth+'px';
					d.style.height = divHeight+'px';
					p.parentNode.replaceChild(d, p);
					d.appendChild(p);
				}
				
				if(icon_src != ''){
					d.appendChild(img_icon);
				}
//				d.appendChild(reflection);
				
				d.appendChild(createUrlDateNode(url, date));
			//それ以外
			} else {
				var canvas = document.createElement('canvas');
				canvas.id = id;
				if (canvas.getContext) {
					/* Copy original image's classes & styles to div */
					p.className = 'reflect discovery_img';
			
/*			
					var context = canvas.getContext("2d");
					
					canvas.className = 'discovery_canvas';
					canvas.style.height = (reflectionHeight * options['disp_height'])+'px';
					canvas.style.width = reflectionWidth+'px';
					canvas.height = reflectionHeight;
					canvas.width = reflectionWidth;
*/					
					if(!div){
						d.style.width = reflectionWidth+'px';
						d.style.height = divHeight+'px';
						p.parentNode.replaceChild(d, p);
						d.appendChild(p);
					}
					
					if(icon_src != ''){
						d.appendChild(img_icon);
					}
//					d.appendChild(canvas);
					d.appendChild(createUrlDateNode(url, date));

/*				
					context.save();
					
					context.translate(0,image.height-1);
					context.scale(1,-1);
					
					context.drawImage(image, 0, 0, reflectionWidth, image.height);
	
					context.restore();
					
					context.globalCompositeOperation = "destination-out";
					var gradient = context.createLinearGradient(0, 0, 0, reflectionHeight);
					
					gradient.addColorStop(1, "rgba(255, 255, 255, 1.0)");
					gradient.addColorStop(0, "rgba(255, 255, 255, "+(1-options['opacity'])+")");
		
					context.fillStyle = gradient;
					if (navigator.appVersion.indexOf('WebKit') != -1) {
						context.fill();
					} else {
						context.fillRect(0, 0, reflectionWidth, reflectionHeight*2);
					}
*/
				}
			}
			
		} catch (e) {

	    }
	},
	
	remove : function(image) {
		if (image.className == "reflected") {
			image.className = image.parentNode.className;
			image.parentNode.parentNode.replaceChild(image, image.parentNode);
		}
	}
}

function redrawReflection(imgId, divId, url, date, time, icon_src){
//	if(time > reflection_timeout){
//		return;
//	}
	
	if(time <= reflection_timeout && !document.getElementById(imgId).complete){
		setTimeout('redrawReflection("' + imgId + '", "' + divId + '", "' + url + '", "' + date + '", ' + (time + 100) + ', "' + icon_src + '")', 100);
		return;
	}

	// reflection ID
	var i = parseInt(imgId.substring(imgId.length - 1));
	
	Reflection.add(imgId, { height: 0.5, opacity : 0.8}, i - 1, divId, url, date, 0, icon_src);
}

var reflectInitCount = 0;

function redrawReflectionInit(imgId, url, date, time, icon_src){
//	if(time > reflection_timeout){
//		return;
//	}

	var i = parseInt(imgId.substring(imgId.length - 1));
	if(time <= reflection_timeout && !document.getElementById(imgId).complete){
		setTimeout('redrawReflectionInit("' + imgId + '", "' + url + '", "' + date + '", ' + (time + 100) + ', "' + icon_src + '")', 100);
		return;
	}

	Reflection.add(imgId, { height: 0.5, opacity : 0.8}, i - 1, null, url, date, 0, icon_src);
	
	reflectInitCount++;
	if(reflectInitCount >= discImgNum){
		gred_anim_init();
	}
}


function addReflections() {
	var rimages = document.myGetElementsByClassName('reflect');
	for (i=0;i<rimages.length;i++) {
		var rheight = null;
		var ropacity = null;
		
		var classes = rimages[i].className.split(' ');
		for (j=0;j<classes.length;j++) {
			if (classes[j].indexOf("rheight") == 0) {
				var rheight = classes[j].substring(7)/100;
			} else if (classes[j].indexOf("ropacity") == 0) {
				var ropacity = classes[j].substring(8)/100;
			}
		}
		
		Reflection.add(rimages[i], { height: rheight, opacity : ropacity}, i, null, null);
	}
}

//var previousOnload = window.onload;
//window.onload = function () { if(previousOnload) previousOnload(); addReflections(); }