openlayers(一)


//利用匿名函数来封装Openlayers的名字空间
(function() {
//当你直接导入压缩过的Openlayers.js文件时这个singleFile的值为true,如果是导入lib目录下的Openlayers.js文件,这个值就为false
var singleFile = (typeof OpenLayers == "object" && OpenLayers.singleFile);

//名字空间
window.OpenLayers = {

//脚本名字(变量前面带有下划线,在js中一般表示是私有变量,相当于java中的private)
_scriptName: (!singleFile) ? "lib/OpenLayers.js" : "OpenLayers.js",
//脚本目录
_getScriptLocation: function () {
var scriptLocation = "";
//正则表达式,匹配src中含有脚本名字的script标签
var isOL = new RegExp("(^|(.*?\\/))(" + OpenLayers._scriptName + ")(\\?|$)");
//获取页面中的所有script标签
var scripts = document.getElementsByTagName('script');
//循环这个数组,用isOL去匹配,把匹配项的目录值赋给scriptLocation变量
for (var i=0, len=scripts.length; i<len; i++) {
var src = scripts[i].getAttribute('src');
if (src) {
var match = src.match(isOL);
if(match) {
scriptLocation = match[1];
break;
}
}
}
return scriptLocation;
}
};
//这里是动态加载script,用了两种方式一种是W3C的标准DOM模型操作,一种是document.write()直接输出script的html代码。考虑到使用两种方式主要是js文件的加载有先后顺序。如果加载的顺序出错,在Openlayers则不能使用。而IE如果是用W3C的DOM模型来加载js代码,则加载的顺序是按那个js文件先下载回来,就先加载那个。这个应该是IE的一个bug,而Firefox用这两种方法都可以,不会出现顺序混乱的现象。
if(!singleFile) {
var jsfiles = new Array(
"OpenLayers/Util.js",
"OpenLayers/BaseTypes.js",
"OpenLayers/BaseTypes/Class.js",
"OpenLayers/BaseTypes/Bounds.js",
"OpenLayers/BaseTypes/Element.js",
"OpenLayers/BaseTypes/LonLat.js",
"OpenLayers/BaseTypes/Pixel.js",
"OpenLayers/BaseTypes/Size.js",
"OpenLayers/Console.js",
"OpenLayers/Tween.js",
"Rico/Corner.js",
"Rico/Color.js",
"OpenLayers/Ajax.js",
"OpenLayers/Events.js",
"OpenLayers/Request.js",
"OpenLayers/Request/XMLHttpRequest.js",
"OpenLayers/Projection.js",
"OpenLayers/Map.js",
"OpenLayers/Layer.js",
"OpenLayers/Icon.js",
"OpenLayers/Marker.js",
"OpenLayers/Marker/Box.js",
"OpenLayers/Popup.js",
"OpenLayers/Tile.js",
"OpenLayers/Tile/Image.js",
"OpenLayers/Tile/WFS.js",
"OpenLayers/Layer/Image.js",
"OpenLayers/Layer/SphericalMercator.js",
"OpenLayers/Layer/EventPane.js",
"OpenLayers/Layer/FixedZoomLevels.js",
"OpenLayers/Layer/Google.js",
"OpenLayers/Layer/VirtualEarth.js",
"OpenLayers/Layer/Yahoo.js",
"OpenLayers/Layer/HTTPRequest.js",
"OpenLayers/Layer/Grid.js",
"OpenLayers/Layer/MapGuide.js",
"OpenLayers/Layer/MapServer.js",
"OpenLayers/Layer/MapServer/Untiled.js",
"OpenLayers/Layer/KaMap.js",
"OpenLayers/Layer/KaMapCache.js",
"OpenLayers/Layer/MultiMap.js",
"OpenLayers/Layer/Markers.js",
"OpenLayers/Layer/Text.js",
"OpenLayers/Layer/WorldWind.js",
"OpenLayers/Layer/ArcGIS93Rest.js",
"OpenLayers/Layer/WMS.js",
"OpenLayers/Layer/WMS/Untiled.js",
"OpenLayers/Layer/ArcIMS.js",
"OpenLayers/Layer/GeoRSS.js",
"OpenLayers/Layer/Boxes.js",
"OpenLayers/Layer/XYZ.js",
"OpenLayers/Layer/TMS.js",
"OpenLayers/Layer/TileCache.js",
"OpenLayers/Popup/Anchored.js",
"OpenLayers/Popup/AnchoredBubble.js",
"OpenLayers/Popup/Framed.js",
"OpenLayers/Popup/FramedCloud.js",
"OpenLayers/Feature.js",
"OpenLayers/Feature/Vector.js",
"OpenLayers/Feature/WFS.js",
"OpenLayers/Handler.js",
"OpenLayers/Handler/Click.js",
"OpenLayers/Handler/Hover.js",
"OpenLayers/Handler/Point.js",
"OpenLayers/Handler/Path.js",
"OpenLayers/Handler/Polygon.js",
"OpenLayers/Handler/Feature.js",
"OpenLayers/Handler/Drag.js",
"OpenLayers/Handler/RegularPolygon.js",
"OpenLayers/Handler/Box.js",
"OpenLayers/Handler/MouseWheel.js",
"OpenLayers/Handler/Keyboard.js",
"OpenLayers/Control.js",
"OpenLayers/Control/Attribution.js",
"OpenLayers/Control/Button.js",
"OpenLayers/Control/ZoomBox.js",
"OpenLayers/Control/ZoomToMaxExtent.js",
"OpenLayers/Control/DragPan.js",
"OpenLayers/Control/Navigation.js",
"OpenLayers/Control/MouseDefaults.js",
"OpenLayers/Control/MousePosition.js",
"OpenLayers/Control/OverviewMap.js",
"OpenLayers/Control/KeyboardDefaults.js",
"OpenLayers/Control/PanZoom.js",
"OpenLayers/Control/PanZoomBar.js",
"OpenLayers/Control/ArgParser.js",
"OpenLayers/Control/Permalink.js",
"OpenLayers/Control/Scale.js",
"OpenLayers/Control/ScaleLine.js",
"OpenLayers/Control/Snapping.js",
"OpenLayers/Control/Split.js",
"OpenLayers/Control/LayerSwitcher.js",
"OpenLayers/Control/DrawFeature.js",
"OpenLayers/Control/DragFeature.js",
"OpenLayers/Control/ModifyFeature.js",
"OpenLayers/Control/Panel.js",
"OpenLayers/Control/SelectFeature.js",
"OpenLayers/Control/NavigationHistory.js",
"OpenLayers/Control/Measure.js",
"OpenLayers/Control/WMSGetFeatureInfo.js",
"OpenLayers/Geometry.js",
"OpenLayers/Geometry/Rectangle.js",
"OpenLayers/Geometry/Collection.js",
"OpenLayers/Geometry/Point.js",
"OpenLayers/Geometry/MultiPoint.js",
"OpenLayers/Geometry/Curve.js",
"OpenLayers/Geometry/LineString.js",
"OpenLayers/Geometry/LinearRing.js",
"OpenLayers/Geometry/Polygon.js",
"OpenLayers/Geometry/MultiLineString.js",
"OpenLayers/Geometry/MultiPolygon.js",
"OpenLayers/Geometry/Surface.js",
"OpenLayers/Renderer.js",
"OpenLayers/Renderer/Elements.js",
"OpenLayers/Renderer/SVG.js",
"OpenLayers/Renderer/Canvas.js",
"OpenLayers/Renderer/VML.js",
"OpenLayers/Layer/Vector.js",
"OpenLayers/Layer/Vector/RootContainer.js",
"OpenLayers/Strategy.js",
"OpenLayers/Strategy/Fixed.js",
"OpenLayers/Strategy/Cluster.js",
"OpenLayers/Strategy/Paging.js",
"OpenLayers/Strategy/BBOX.js",
"OpenLayers/Strategy/Save.js",
"OpenLayers/Protocol.js",
"OpenLayers/Protocol/HTTP.js",
"OpenLayers/Protocol/SQL.js",
"OpenLayers/Protocol/SQL/Gears.js",
"OpenLayers/Protocol/WFS.js",
"OpenLayers/Protocol/WFS/v1.js",
"OpenLayers/Protocol/WFS/v1_0_0.js",
"OpenLayers/Protocol/WFS/v1_1_0.js",
"OpenLayers/Layer/PointTrack.js",
"OpenLayers/Layer/GML.js",
"OpenLayers/Style.js",
"OpenLayers/StyleMap.js",
"OpenLayers/Rule.js",
"OpenLayers/Filter.js",
"OpenLayers/Filter/FeatureId.js",
"OpenLayers/Filter/Logical.js",
"OpenLayers/Filter/Comparison.js",
"OpenLayers/Filter/Spatial.js",
"OpenLayers/Format.js",
"OpenLayers/Format/XML.js",
"OpenLayers/Format/ArcXML.js",
"OpenLayers/Format/ArcXML/Features.js",
"OpenLayers/Format/GML.js",
"OpenLayers/Format/GML/Base.js",
"OpenLayers/Format/GML/v2.js",
"OpenLayers/Format/GML/v3.js",
"OpenLayers/Format/KML.js",
"OpenLayers/Format/GeoRSS.js",
"OpenLayers/Format/WFS.js",
"OpenLayers/Format/WFSCapabilities.js",
"OpenLayers/Format/WFSCapabilities/v1.js",
"OpenLayers/Format/WFSCapabilities/v1_0_0.js",
"OpenLayers/Format/WFSCapabilities/v1_1_0.js",
"OpenLayers/Format/WFSDescribeFeatureType.js",
"OpenLayers/Format/WMSDescribeLayer.js",
"OpenLayers/Format/WMSDescribeLayer/v1_1.js",
"OpenLayers/Format/WKT.js",
"OpenLayers/Format/OSM.js",
"OpenLayers/Format/GPX.js",
"OpenLayers/Format/Filter.js",
"OpenLayers/Format/Filter/v1.js",
"OpenLayers/Format/Filter/v1_0_0.js",
"OpenLayers/Format/Filter/v1_1_0.js",
"OpenLayers/Format/SLD.js",
"OpenLayers/Format/SLD/v1.js",
"OpenLayers/Format/SLD/v1_0_0.js",
"OpenLayers/Format/SLD/v1.js",
"OpenLayers/Format/WFST.js",
"OpenLayers/Format/WFST/v1.js",
"OpenLayers/Format/WFST/v1_0_0.js",
"OpenLayers/Format/WFST/v1_1_0.js",
"OpenLayers/Format/Text.js",
"OpenLayers/Format/JSON.js",
"OpenLayers/Format/GeoJSON.js",
"OpenLayers/Format/WMC.js",
"OpenLayers/Format/WMC/v1.js",
"OpenLayers/Format/WMC/v1_0_0.js",
"OpenLayers/Format/WMC/v1_1_0.js",
"OpenLayers/Format/WMSCapabilities.js",
"OpenLayers/Format/WMSCapabilities/v1_1.js",
"OpenLayers/Format/WMSCapabilities/v1_1_0.js",
"OpenLayers/Format/WMSCapabilities/v1_1_1.js",
"OpenLayers/Format/WMSGetFeatureInfo.js",
"OpenLayers/Layer/WFS.js",
"OpenLayers/Control/GetFeature.js",
"OpenLayers/Control/MouseToolbar.js",
"OpenLayers/Control/NavToolbar.js",
"OpenLayers/Control/PanPanel.js",
"OpenLayers/Control/Pan.js",
"OpenLayers/Control/ZoomIn.js",
"OpenLayers/Control/ZoomOut.js",
"OpenLayers/Control/ZoomPanel.js",
"OpenLayers/Control/EditingToolbar.js",
"OpenLayers/Lang.js",
"OpenLayers/Lang/en.js"
); // etc.
var agent = navigator.userAgent;
var docWrite = (agent.match("MSIE") || agent.match("Safari"));
if(docWrite) {
var allScriptTags = new Array(jsfiles.length);
}
var host = OpenLayers._getScriptLocation() + "lib/";
for (var i=0, len=jsfiles.length; i<len; i++) {
if (docWrite) {
allScriptTags[i] = "<mce:script src="" + host + jsfiles[i] +
"" mce_src="" + host + jsfiles[i] +
""></mce:script>";
} else {
var s = document.createElement("script");
s.src = host + jsfiles[i];
var h = document.getElementsByTagName("head").length ?
document.getElementsByTagName("head")[0] :
document.body;
h.appendChild(s);
}
}
if (docWrite) {
document.write(allScriptTags.join(""));
}
}
})();
//Openlayers的版本号
OpenLayers.VERSION_NUMBER="OpenLayers 2.8 -- $Revision: 9492 $";


出处:http://blog.csdn.net/baozhifei/archive/2009/08/13/4444696.aspx
转载自:https://blog.csdn.net/abcsoswane/article/details/83489317

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