/* zoom any image
 * widget by IonDen
 * v 2.0 beta
 * 09.03.2010
 * rev. 36
 * depends on jQuery 1.4
 * UTF-8
 */
$(document).ready(function(){
	var placeToCenter = false; // этот параметр отвечает за размещение картинки

	function debug(name) {$("#debug").text(name)};

	var bpOff = 0;
	var bpWidth = 0;
	var bpHeight = 0;
	var bpcLeft = 0;
	var bpcTop = 0;
	
	var zoomWidth = 0;
	var zoomHeight = 0;
	
	var width_array = new Array();
	var height_array = new Array();
	
	var screenWidth = 0;
	var screenHeight = 0;
	var screenScroll = 0;
	var scrLeft = 0;
	var scrTop = 0;
	
	var localTop = 0;
	var localLeft = 0;
	
	$("body").append('<div class="zoomShadow"><table><tr><td class="zs1"><b></b></td><td class="zh1"><b></b></td><td class="zs2"><b></b></td></tr><tr><td class="zv1"><b></b></td><td><div class="zoomBase"></div></td><td class="zv2"><b></b></td></tr><tr><td class="zs3"><b></b></td><td class="zh2"><b></b></td><td class="zs4"><b></b></td></tr></table></div>\r');
	var zoomX = '<a href="#" class="zoomX"></a>\r';

	var firstClick = true;
	var galNum = 0;
	var oldZoom = 0;
	var currentZoom = 0;
	var oldW = 0;
	var oldH = 0;
	var oldOf = 0;
	var clicked = false;
	var strashno = false;
	var allLoaded = false;
	var loadStatus = "";
	
    $("a.zoom").click(function(event) {
        event.preventDefault();
		$(this).blur();
		$("a.zoomX").remove();
		$("select").addClass("selOff");
		
		bpOff = $(this).offset();
		bpWidth = $(this).find("img").width();
		bpHeight = $(this).find("img").height();
		if(bpWidth === null) {
			bpWidth = $(this).width();
			bpHeight = $(this).height();
		}
		bpcLeft = Math.round(bpOff.left + (bpWidth / 2));
		bpcTop = Math.round(bpOff.top + (bpHeight / 2));
		
		screenScroll = $(window).scrollTop();
		screenWidth = $("body").innerWidth();
		screenHeight = $(window).height();
		
		scrLeft = Math.round(screenWidth / 2);
		scrTop = Math.round(screenScroll + (screenHeight / 2));
		
		if(firstClick === true) {
			galNum = $(".zoom").length;
			for(var i = 0; i < galNum; i++) {
				$(".zoom:eq(" + i + ")").addClass("myZoom" + i);
			}
			$("body").append('<img id="zoomLoading" src="zoom/zoom-load.gif" />\r')
			$("#zoomLoading").css("left", bpcLeft - 11).css("top", bpcTop - 11);

			for(var i = 0; i < galNum; i++) {
				var zoomUrl = $(".myZoom" + i).attr("href");
				$("body").append('<img class="zoomPic" src="' + zoomUrl + '" id="zoomPic' + i + '" />\r')
			}
			
			currentZoom = $(this).attr("class").slice(11);
			oldZoom = currentZoom;
			
			for(var i = 0; i < galNum; i++) {
				$("#zoomPic" + i).load(function() {
					loadStatus = loadStatus + "a";
					var localId = $(this).attr("id").slice(7);
					width_array[localId] = $(this).width();
					height_array[localId] = $(this).height();
				});
			}
			
			var loading = setInterval(waitForPics, 50);
			firstClick = false;
		} else {
			oldZoom = currentZoom;
			currentZoom = $(this).attr("class").slice(11);
			showPic();
		}
		
		function waitForPics() {
			var zz = loadStatus.length;
			if(zz === galNum) {
				$("#zoomLoading").remove();
				clearInterval(loading);
				showPic();
			}
		}
    });
	
	function showPic() {
		zoomWidth = width_array[currentZoom];
		zoomHeight = height_array[currentZoom];
		
		var ratio = zoomWidth / zoomHeight;
		
		//check size
		if(zoomHeight > screenHeight - 45) {
			zoomHeight = screenHeight - 45;
			zoomWidth = zoomHeight * ratio;
		} else if(zoomWidth > screenWidth - 50) {
			zoomWidth = screenWidth - 50;
			zoomHeight = zoomWidth / ratio;
		}
		
		oldW = $(".myZoom" + oldZoom + " img").width();
		oldH = $(".myZoom" + oldZoom + " img").height();
		oldOf = $(".myZoom" + oldZoom + " img").offset();
		if(oldW === null) {
			oldW = $(".myZoom" + oldZoom).width();
			oldH = $(".myZoom" + oldZoom).height();
			oldOf = $(".myZoom" + oldZoom).offset();
		}
		
		//check place
		localTop = bpcTop - (zoomHeight / 2);
		if(localTop < screenScroll + 20) {localTop = screenScroll + 20};
		if(localTop + zoomHeight > screenScroll + screenHeight - 20) {localTop = screenScroll + screenHeight - zoomHeight - 20};
		localLeft = bpcLeft - (zoomWidth / 2);
		if(localLeft < 20) {localLeft = 20};
		if(localLeft > screenWidth - zoomWidth - 25) {localLeft = screenWidth - zoomWidth - 25};
		
		$("#zoomPic" + currentZoom).css("top", bpOff.top).css("left", bpOff.left).css("width", bpWidth).css("height", bpHeight);
		if(placeToCenter === false) {
			// in place

			$("#zoomPic" + currentZoom).animate({
				width:zoomWidth,
				height:zoomHeight,
				left:localLeft,
				top:localTop
			}, 150, setShadow);
			
			if(currentZoom !== oldZoom && strashno === false) {
				removeShadow();
				$("#zoomPic" + oldZoom).animate({
					width:oldW,
					height:oldH,
					left:oldOf.left,
					top:oldOf.top
				}, 200, removeOld);
			}
			
			strashno = false;
		} else {
			// in center
		}
	};
	
	function setShadow() {
		clicked = false;
		var zsLeft = localLeft - 6;
		var zsTop = localTop - 6;
		$("div.zoomShadow").css("left", zsLeft).css("top", zsTop);
		$("div.zoomShadow div.zoomBase").width(zoomWidth - 8).height(zoomHeight - 8);
		
		for(var i = 0; i < galNum; i++) {
			if(i !== parseInt(currentZoom)) {
				$("#zoomPic" + i).css("top", -9999).css("left", 0).css("width", width_array[i]).css("height", height_array[i]);
			}
		}
		
		$("#zoomPic" + currentZoom).click(function(event){
			$("a.zoomX").remove();
			hideCurrent();
		});
		
		$("body").append(zoomX);
		$("a.zoomX").css("left", localLeft + zoomWidth - 16).css("top", localTop - 17);
		
		$("a.zoomX").click(function(event){
	        event.preventDefault();
			$("a.zoomX").remove();
			hideCurrent();
		});
		$("select").addClass("selOff");
	}
	function removeShadow() {
		$("div.zoomShadow").css("top", -9999).css("left", 0);
	}
	
	function removeOld() {
		$("#zoomPic" + oldZoom).css("top", -9999).css("left", 0).css("width", width_array[oldZoom]).css("height", height_array[oldZoom]);
	}
	
	function hideCurrent() {
		if(clicked === false) {
			$("select").removeClass("selOff");
			oldZoom = currentZoom;

			oldWidth = width_array[oldZoom];
			oldHeight = height_array[oldZoom];
			
			oldW = $(".myZoom" + oldZoom + " img").width();
			oldH = $(".myZoom" + oldZoom + " img").height();
			oldOf = $(".myZoom" + oldZoom + " img").offset();
			if(oldW === null) {
				oldW = $(".myZoom" + oldZoom).width();
				oldH = $(".myZoom" + oldZoom).height();
				oldOf = $(".myZoom" + oldZoom).offset();
			}

			removeShadow();
			$("#zoomPic" + oldZoom).animate({
				width:oldW,
				height:oldH,
				left:oldOf.left,
				top:oldOf.top
			}, 200, removeOld);
			
			strashno = true;
		}
		clicked = true;
	}
	
	$(window).keydown(function(event) {
		if(event.keyCode == '27') {
			$("a.zoomX").remove();
			hideCurrent();
		}
		if(event.keyCode == '39' && galNum > 1) {
			removeShadow();
			$("a.zoomX").remove();
			oldZoom = currentZoom;

			if(firstClick === false) {
				if(currentZoom < galNum - 1) {
					currentZoom++;
				} else {
					currentZoom = 0;
				}
			}

			bpOff = $(".myZoom" + currentZoom).offset()
			bpWidth = $(".myZoom" + currentZoom).find("img").width();
			bpHeight = $(".myZoom" + currentZoom).find("img").height();
			if(bpWidth === null) {
				bpWidth = $(".myZoom" + currentZoom).width();
				bpHeight = $(".myZoom" + currentZoom).height();
			}
			bpcLeft = Math.round(bpOff.left + (bpWidth / 2));
			bpcTop = Math.round(bpOff.top + (bpHeight / 2));
		
			showPic();
		}
		if(event.keyCode == '37' && galNum > 1) {
			removeShadow();
			$("a.zoomX").remove();
			oldZoom = currentZoom;

			if(firstClick === false) {
				if(currentZoom > 0) {
					currentZoom--;
				} else {
					currentZoom = galNum - 1;
				}
			}
			
			bpOff = $(".myZoom" + currentZoom).offset()
			bpWidth = $(".myZoom" + currentZoom).find("img").width();
			bpHeight = $(".myZoom" + currentZoom).find("img").height();
			if(bpWidth === null) {
				bpWidth = $(".myZoom" + currentZoom).width();
				bpHeight = $(".myZoom" + currentZoom).height();
			}
			bpcLeft = Math.round(bpOff.left + (bpWidth / 2));
			bpcTop = Math.round(bpOff.top + (bpHeight / 2));
			
			showPic();
		}
	});
});