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(function(){

var PrintMap = {};

var LAYER_COUNT = 0;

var LAYER_LENGTH = 0;

window.MapToImg = PrintMap;

PrintMap.excute = function(map){

var canvas = document.createElement("canvas");

var broz = SuperMap.Browser.name;

if(!canvas.getContext||(broz=='msie'&&!canvas.msToBlob)){

alert("您的浏览器版本太低，请升级。");

return;

}

if(document.location.toString().match(/file:\/\//)){

alert("该功能需要在服务器中发布出来后，方可使用");

return;

}

LAYER_COUNT = 0;

var layers = map.layers.concat([]);

//layers排序，将markers放到最上边

var layers1 = [];

for(var i=0;i<layers.length;i++){

if(layers[i].CLASS_NAME == "SuperMap.Layer.Markers"){

var templayer = layers.splice(i,1);

layers1.push(templayer[0]);

}

}

layers = layers.concat(layers1);

LAYER_LENGTH = layers.length;

var imgUrls = [];

for(var i=0;i<layers.length;i++){

var layer = layers[i];

if(layer.CLASS_NAME == "SuperMap.Layer.TiledDynamicRESTLayer"){

if(layer.useCanvas==false){

draw(getImgLayerData(layer,map),i,imgUrls);

}

else{

draw(getCanvasLayerData(layer),i,imgUrls);

}

}

else if(layer.CLASS_NAME == "SuperMap.Layer.Markers"){

draw(getImgLayerData(layer,map),i,imgUrls);

}

else if(layer.CLASS_NAME == "SuperMap.Layer.Vector"){

getVectorLayerData(layer,map,function(imgUrls,i){

return function(img){

draw(img,i,imgUrls);

}

}(imgUrls,i))

}

}

};

function draw(img,i,imgUrls){

imgUrls[i] = img;

LAYER_COUNT++;

if(LAYER_COUNT>=LAYER_LENGTH){

var canvas = document.createElement("canvas");

var size = map.getSize();

canvas.height = size.h;

canvas.width = size.w;

var ctx = canvas.getContext("2d");

canvas.style.position = "relative";

canvas.style.border = "1px solid #4c4c4c";

//document.body.appendChild(canvas);

var panel = document.createElement("div");

panel.style.position = "absolute";

panel.style.left = "0px";

panel.style.top = "0px";

panel.style.height = "100%";

panel.style.width = "100%";

// panel.style.background = "#e6e8eb";

panel.style.background = "#ffffff";

document.body.appendChild(panel);

var buttonPanel = document.createElement("div");

buttonPanel.style.position = "relative";

panel.appendChild(buttonPanel);

panel.appendChild(canvas);

window.setTimeout(function(){

for(var i=0;i<imgUrls.length;i++){

ctx.drawImage(imgUrls[i],0,0);

}

if(canvas.msToBlob){

var button = document.createElement("input");

buttonPanel.appendChild(button);

button.type = "button";

button.value = "保存";

button.onclick = function(){

window.navigator.msSaveBlob(canvas.msToBlob(), 'map.png');

}

}

else{

var aa = document.createElement("a");

buttonPanel.appendChild(aa);

aa.target = "_blank";

aa.download="map.png";

aa.href=canvas.toDataURL();

var button = document.createElement("input");

aa.appendChild(button);

button.type = "button";

button.value = "保存";

}

var button = document.createElement("input");

buttonPanel.appendChild(button);

button.type = "button";

button.value = "关闭";

button.onclick = function(){

document.body.removeChild(panel);

}

},30);

}

}

//截取图片图层

function getImgLayerData(layer,map){

var div = layer.div;

var pdiv = div.parentNode;

var offsetX = parseInt(pdiv.style.left.replace(/px/,""));

var offsetY = parseInt(pdiv.style.top.replace(/px/,""));

var canvas = document.createElement("canvas");

var size = map.getSize();

canvas.height = size.h;

canvas.width = size.w;

var ctx = canvas.getContext("2d");

canvas.style.position = "absolute";

canvas.style.left = "5px";

canvas.style.top = "600px";

canvas.style.border = "1px solid #f00";

//document.body.appendChild(canvas);

var divs = div.getElementsByTagName("div");

for(var i=0;i<divs.length;i++){

var div1 = divs[i];

if(div1.style.display!="none"){

var left = parseInt(div1.style.left.replace(/px/,""));

var top = parseInt(div1.style.top.replace(/px/,""));

var img = div1.getElementsByTagName("img")[0];

var imgWidth = img.style.width;

var imgHeight = img.style.height;

var imgW = null,imgH = null;

if(imgWidth!=null||imgWidth!=""){

imgW = parseInt(imgWidth.replace(/px/,""));

}

if(imgHeight!=null||imgHeight!=""){

imgH = parseInt(imgHeight.replace(/px/,""));

}

if(imgW!=null&&imgH!=null){

ctx.drawImage(img,left+offsetX,top+offsetY,imgW,imgH);

}

else{

ctx.drawImage(img,left+offsetX,top+offsetY);

}

}

}

var imageUrl = canvas.toDataURL("image/png");

var img = new Image();

img.src = imageUrl;

return img;

}

//截取canvas图层

function getCanvasLayerData(layer){

var div = layer.div;

var canvas0 = div.getElementsByTagName("canvas")[0];

var imageUrl = canvas0.toDataURL("image/png");

var img = new Image();

img.src = imageUrl;

return img;

}

//截取Vector图层

function getVectorLayerData(layer,map,callback){

var printLayer,

strategies = [],

features1 = [],

features = layer.features,

layerStrategies = layer.strategies;

//GeoText无法截图问题修复

if(layerStrategies){

for(var i = 0; i<layerStrategies.length; i++){

if (layerStrategies[i].CLASS_NAME === "SuperMap.Strategy.GeoText"){

strategies.push(layerStrategies[i].clone());

}else{

strategies.push(layerStrategies[i]);

}

}

printLayer = new SuperMap.Layer.Vector("PRINT_LAYER", {strategies: strategies, visibility: true, renderers: ["Canvas"]});

}else{

printLayer = new SuperMap.Layer.Vector("PRINT_LAYER", {visibility: true, renderers: ["Canvas"]});

}

map.addLayer(printLayer);

for(var j=0;j<features.length;j++){

var feature = features[j];

var feature1 = new SuperMap.Feature.Vector();

feature1.geometry = feature.geometry.clone();

feature1.style = feature.style;

features1.push(feature1);

}

if(layer.style){

printLayer.style = layer.style;

}

printLayer.setOpacity(0);

printLayer.addFeatures(features1);

window.setTimeout(function(printLayer,map,callback){

return function(){

var div = printLayer.div;

var canvas1 = div.getElementsByTagName("canvas")[0];

var cxt1 = canvas1.getContext("2d");

var imageUrl = canvas1.toDataURL("image/png");

map.removeLayer(printLayer);

printLayer.destroy();

var img = new Image();

img.src = imageUrl;

callback(img);

}

}(printLayer,map,callback),30);

}

})();