| | 88 | |
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| | 89 | // Make a list, so that getFullRequestString uses literal "," |
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| | 90 | var extent = [bounds.left, bounds. bottom, bounds.right, bounds.top]; |
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| | 91 | |
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| | 92 | // make lists, so that literal ','s are used |
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| | 93 | var url = this.getFullRequestString( |
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| | 94 | {mapext: extent, |
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| | 95 | imgext: extent, |
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| | 96 | map_size: [this.tileSize.w,this.tileSize.h], |
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| | 97 | imgx: this.tileSize.w/2, |
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| | 98 | imgy: this.tileSize.h/2, |
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| | 99 | imgxy: [this.tileSize.w,this.tileSize.h] |
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| | 100 | }); |
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| | 101 | |
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| | 102 | return url; |
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| | 103 | }, |
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| | 104 | |
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| | 105 | /** |
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| | 106 | * getFullRequestString on MapServer layers is special, because we |
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| | 107 | * do a regular expression replace on ',' in parameters to '+'. |
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| | 108 | * This is why it is subclassed here. |
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| | 109 | * |
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| | 110 | * @param {Object} newParams Parameters to add to the default parameters |
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| | 111 | * for the layer. |
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| | 112 | * @param {String} altUrl Alternative base URL to use. |
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| | 113 | */ |
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| | 114 | getFullRequestString:function(newParams, altUrl) { |
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| | 115 | |
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| | 116 | |
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| | 117 | // use layer's url unless altUrl passed in |
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| | 118 | var url = (altUrl == null) ? this.url : altUrl; |
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| | 119 | |
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| | 120 | // if url is not a string, it should be an array of strings, |
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| | 121 | // in which case we will randomly select one of them in order |
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| | 122 | // to evenly distribute requests to different urls. |
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| | 123 | if (typeof url == "object") { |
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| | 124 | url = url[Math.floor(Math.random()*url.length)]; |
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| | 125 | } |
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| | 126 | // requestString always starts with url |
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| | 127 | var requestString = url; |
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| 89 | | var url = this.getFullRequestString( |
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| 90 | | {mapext:bounds.toBBOX().replace(/,/g,"+"), |
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| 91 | | imgext:bounds.toBBOX().replace(/,/g,"+"), |
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| 92 | | map_size:this.tileSize.w+'+'+this.tileSize.h, |
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| 93 | | imgx: this.tileSize.w/2, |
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| 94 | | imgy: this.tileSize.h/2, |
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| 95 | | imgxy: this.tileSize.w+"+"+this.tileSize.h |
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| 96 | | }); |
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| 97 | | return url; |
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| | 129 | // create a new params hashtable with all the layer params and the |
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| | 130 | // new params together. then convert to string |
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| | 131 | var allParams = OpenLayers.Util.extend(new Object(), this.params); |
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| | 132 | allParams = OpenLayers.Util.extend(allParams, newParams); |
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| | 133 | // ignore parameters that are already in the url search string |
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| | 134 | var urlParams = OpenLayers.Util.upperCaseObject( |
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| | 135 | OpenLayers.Util.getArgs(url)); |
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| | 136 | for(var key in allParams) { |
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| | 137 | if(key.toUpperCase() in urlParams) { |
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| | 138 | delete allParams[key]; |
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| | 139 | } |
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| | 140 | } |
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| | 141 | var paramsString = OpenLayers.Util.getParameterString(allParams); |
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| | 142 | |
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| | 143 | /* MapServer needs '+' seperating things like bounds/height/width. |
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| | 144 | Since typically this is URL encoded, we use a slight hack: we |
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| | 145 | depend on the list-like functionality of getParameterString to |
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| | 146 | leave ',' only in the case of list items (since otherwise it is |
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| | 147 | encoded) then do a regular expression replace on the , characters |
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| | 148 | to '+' */ |
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| | 149 | paramsString = paramsString.replace(/,/g, "+"); |
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| | 150 | |
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| | 151 | if (paramsString != "") { |
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| | 152 | var lastServerChar = url.charAt(url.length - 1); |
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| | 153 | if ((lastServerChar == "&") || (lastServerChar == "?")) { |
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| | 154 | requestString += paramsString; |
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| | 155 | } else { |
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| | 156 | if (url.indexOf('?') == -1) { |
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| | 157 | //serverPath has no ? -- add one |
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| | 158 | requestString += '?' + paramsString; |
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| | 159 | } else { |
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| | 160 | //serverPath contains ?, so must already have paramsString at the end |
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| | 161 | requestString += '&' + paramsString; |
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| | 162 | } |
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| | 163 | } |
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| | 164 | } |
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| | 165 | return requestString; |
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