1 | /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for |
---|
2 | * full list of contributors). Published under the Clear BSD license. |
---|
3 | * See http://svn.openlayers.org/trunk/openlayers/license.txt for the |
---|
4 | * full text of the license. */ |
---|
5 | |
---|
6 | /** |
---|
7 | * @requires OpenLayers/Format/WMC.js |
---|
8 | * @requires OpenLayers/Format/XML.js |
---|
9 | */ |
---|
10 | |
---|
11 | /** |
---|
12 | * Class: OpenLayers.Format.WMC.v1 |
---|
13 | * Superclass for WMC version 1 parsers. |
---|
14 | * |
---|
15 | * Inherits from: |
---|
16 | * - <OpenLayers.Format.XML> |
---|
17 | */ |
---|
18 | OpenLayers.Format.WMC.v1 = OpenLayers.Class(OpenLayers.Format.XML, { |
---|
19 | |
---|
20 | /** |
---|
21 | * Property: namespaces |
---|
22 | * {Object} Mapping of namespace aliases to namespace URIs. |
---|
23 | */ |
---|
24 | namespaces: { |
---|
25 | ol: "http://openlayers.org/context", |
---|
26 | wmc: "http://www.opengis.net/context", |
---|
27 | sld: "http://www.opengis.net/sld", |
---|
28 | xlink: "http://www.w3.org/1999/xlink", |
---|
29 | xsi: "http://www.w3.org/2001/XMLSchema-instance" |
---|
30 | }, |
---|
31 | |
---|
32 | /** |
---|
33 | * Property: schemaLocation |
---|
34 | * {String} Schema location for a particular minor version. |
---|
35 | */ |
---|
36 | schemaLocation: "", |
---|
37 | |
---|
38 | /** |
---|
39 | * Method: getNamespacePrefix |
---|
40 | * Get the namespace prefix for a given uri from the <namespaces> object. |
---|
41 | * |
---|
42 | * Returns: |
---|
43 | * {String} A namespace prefix or null if none found. |
---|
44 | */ |
---|
45 | getNamespacePrefix: function(uri) { |
---|
46 | var prefix = null; |
---|
47 | if(uri == null) { |
---|
48 | prefix = this.namespaces[this.defaultPrefix]; |
---|
49 | } else { |
---|
50 | for(prefix in this.namespaces) { |
---|
51 | if(this.namespaces[prefix] == uri) { |
---|
52 | break; |
---|
53 | } |
---|
54 | } |
---|
55 | } |
---|
56 | return prefix; |
---|
57 | }, |
---|
58 | |
---|
59 | /** |
---|
60 | * Property: defaultPrefix |
---|
61 | */ |
---|
62 | defaultPrefix: "wmc", |
---|
63 | |
---|
64 | /** |
---|
65 | * Property: rootPrefix |
---|
66 | * {String} Prefix on the root node that maps to the context namespace URI. |
---|
67 | */ |
---|
68 | rootPrefix: null, |
---|
69 | |
---|
70 | /** |
---|
71 | * Property: defaultStyleName |
---|
72 | * {String} Style name used if layer has no style param. Default is "". |
---|
73 | */ |
---|
74 | defaultStyleName: "", |
---|
75 | |
---|
76 | /** |
---|
77 | * Property: defaultStyleTitle |
---|
78 | * {String} Default style title. Default is "Default". |
---|
79 | */ |
---|
80 | defaultStyleTitle: "Default", |
---|
81 | |
---|
82 | /** |
---|
83 | * Constructor: OpenLayers.Format.WMC.v1 |
---|
84 | * Instances of this class are not created directly. Use the |
---|
85 | * <OpenLayers.Format.WMC> constructor instead. |
---|
86 | * |
---|
87 | * Parameters: |
---|
88 | * options - {Object} An optional object whose properties will be set on |
---|
89 | * this instance. |
---|
90 | */ |
---|
91 | initialize: function(options) { |
---|
92 | OpenLayers.Format.XML.prototype.initialize.apply(this, [options]); |
---|
93 | }, |
---|
94 | |
---|
95 | /** |
---|
96 | * Method: read |
---|
97 | * Read capabilities data from a string, and return a list of layers. |
---|
98 | * |
---|
99 | * Parameters: |
---|
100 | * data - {String} or {DOMElement} data to read/parse. |
---|
101 | * |
---|
102 | * Returns: |
---|
103 | * {Array} List of named layers. |
---|
104 | */ |
---|
105 | read: function(data) { |
---|
106 | if(typeof data == "string") { |
---|
107 | data = OpenLayers.Format.XML.prototype.read.apply(this, [data]); |
---|
108 | } |
---|
109 | var root = data.documentElement; |
---|
110 | this.rootPrefix = root.prefix; |
---|
111 | var context = { |
---|
112 | version: root.getAttribute("version") |
---|
113 | }; |
---|
114 | this.runChildNodes(context, root); |
---|
115 | return context; |
---|
116 | }, |
---|
117 | |
---|
118 | /** |
---|
119 | * Method: runChildNodes |
---|
120 | */ |
---|
121 | runChildNodes: function(obj, node) { |
---|
122 | var children = node.childNodes; |
---|
123 | var childNode, processor, prefix, local; |
---|
124 | for(var i=0, len=children.length; i<len; ++i) { |
---|
125 | childNode = children[i]; |
---|
126 | if(childNode.nodeType == 1) { |
---|
127 | prefix = this.getNamespacePrefix(childNode.namespaceURI); |
---|
128 | local = childNode.nodeName.split(":").pop(); |
---|
129 | processor = this["read_" + prefix + "_" + local]; |
---|
130 | if(processor) { |
---|
131 | processor.apply(this, [obj, childNode]); |
---|
132 | } |
---|
133 | } |
---|
134 | } |
---|
135 | }, |
---|
136 | |
---|
137 | /** |
---|
138 | * Method: read_wmc_General |
---|
139 | */ |
---|
140 | read_wmc_General: function(context, node) { |
---|
141 | this.runChildNodes(context, node); |
---|
142 | }, |
---|
143 | |
---|
144 | /** |
---|
145 | * Method: read_wmc_BoundingBox |
---|
146 | */ |
---|
147 | read_wmc_BoundingBox: function(context, node) { |
---|
148 | context.projection = node.getAttribute("SRS"); |
---|
149 | context.bounds = new OpenLayers.Bounds( |
---|
150 | parseFloat(node.getAttribute("minx")), |
---|
151 | parseFloat(node.getAttribute("miny")), |
---|
152 | parseFloat(node.getAttribute("maxx")), |
---|
153 | parseFloat(node.getAttribute("maxy")) |
---|
154 | ); |
---|
155 | }, |
---|
156 | |
---|
157 | /** |
---|
158 | * Method: read_wmc_LayerList |
---|
159 | */ |
---|
160 | read_wmc_LayerList: function(context, node) { |
---|
161 | // layersContext is an array containing info for each layer |
---|
162 | context.layersContext = []; |
---|
163 | this.runChildNodes(context, node); |
---|
164 | }, |
---|
165 | |
---|
166 | /** |
---|
167 | * Method: read_wmc_Layer |
---|
168 | */ |
---|
169 | read_wmc_Layer: function(context, node) { |
---|
170 | var layerContext = { |
---|
171 | visibility: (node.getAttribute("hidden") != "1"), |
---|
172 | queryable: (node.getAttribute("queryable") == "1"), |
---|
173 | formats: [], |
---|
174 | styles: [] |
---|
175 | }; |
---|
176 | |
---|
177 | this.runChildNodes(layerContext, node); |
---|
178 | // set properties common to multiple objects on layer options/params |
---|
179 | context.layersContext.push(layerContext); |
---|
180 | }, |
---|
181 | |
---|
182 | /** |
---|
183 | * Method: read_wmc_Extension |
---|
184 | */ |
---|
185 | read_wmc_Extension: function(obj, node) { |
---|
186 | this.runChildNodes(obj, node); |
---|
187 | }, |
---|
188 | |
---|
189 | /** |
---|
190 | * Method: read_ol_units |
---|
191 | */ |
---|
192 | read_ol_units: function(layerContext, node) { |
---|
193 | layerContext.units = this.getChildValue(node); |
---|
194 | }, |
---|
195 | |
---|
196 | /** |
---|
197 | * Method: read_ol_maxExtent |
---|
198 | */ |
---|
199 | read_ol_maxExtent: function(obj, node) { |
---|
200 | var bounds = new OpenLayers.Bounds( |
---|
201 | node.getAttribute("minx"), node.getAttribute("miny"), |
---|
202 | node.getAttribute("maxx"), node.getAttribute("maxy") |
---|
203 | ); |
---|
204 | obj.maxExtent = bounds; |
---|
205 | }, |
---|
206 | |
---|
207 | /** |
---|
208 | * Method: read_ol_transparent |
---|
209 | */ |
---|
210 | read_ol_transparent: function(layerContext, node) { |
---|
211 | layerContext.transparent = this.getChildValue(node); |
---|
212 | }, |
---|
213 | |
---|
214 | /** |
---|
215 | * Method: read_ol_numZoomLevels |
---|
216 | */ |
---|
217 | read_ol_numZoomLevels: function(layerContext, node) { |
---|
218 | layerContext.numZoomLevels = parseInt(this.getChildValue(node)); |
---|
219 | }, |
---|
220 | |
---|
221 | /** |
---|
222 | * Method: read_ol_opacity |
---|
223 | */ |
---|
224 | read_ol_opacity: function(layerContext, node) { |
---|
225 | layerContext.opacity = parseFloat(this.getChildValue(node)); |
---|
226 | }, |
---|
227 | |
---|
228 | /** |
---|
229 | * Method: read_ol_singleTile |
---|
230 | */ |
---|
231 | read_ol_singleTile: function(layerContext, node) { |
---|
232 | layerContext.singleTile = (this.getChildValue(node) == "true"); |
---|
233 | }, |
---|
234 | |
---|
235 | /** |
---|
236 | * Method: read_ol_tileSize |
---|
237 | */ |
---|
238 | read_ol_tileSize: function(layerContext, node) { |
---|
239 | var obj = {"width": node.getAttribute("width"), "height": node.getAttribute("height")}; |
---|
240 | layerContext.tileSize = obj; |
---|
241 | }, |
---|
242 | |
---|
243 | /** |
---|
244 | * Method: read_ol_isBaseLayer |
---|
245 | */ |
---|
246 | read_ol_isBaseLayer: function(layerContext, node) { |
---|
247 | layerContext.isBaseLayer = (this.getChildValue(node) == "true"); |
---|
248 | }, |
---|
249 | |
---|
250 | /** |
---|
251 | * Method: read_ol_displayInLayerSwitcher |
---|
252 | */ |
---|
253 | read_ol_displayInLayerSwitcher: function(layerContext, node) { |
---|
254 | layerContext.displayInLayerSwitcher = (this.getChildValue(node) == "true"); |
---|
255 | }, |
---|
256 | |
---|
257 | /** |
---|
258 | * Method: read_wmc_Server |
---|
259 | */ |
---|
260 | read_wmc_Server: function(layerContext, node) { |
---|
261 | layerContext.version = node.getAttribute("version"); |
---|
262 | var server = {}; |
---|
263 | var links = node.getElementsByTagName("OnlineResource"); |
---|
264 | if(links.length > 0) { |
---|
265 | this.read_wmc_OnlineResource(server, links[0]); |
---|
266 | } |
---|
267 | layerContext.url = server.href; |
---|
268 | }, |
---|
269 | |
---|
270 | /** |
---|
271 | * Method: read_wmc_FormatList |
---|
272 | */ |
---|
273 | read_wmc_FormatList: function(layerContext, node) { |
---|
274 | this.runChildNodes(layerContext, node); |
---|
275 | }, |
---|
276 | |
---|
277 | /** |
---|
278 | * Method: read_wmc_Format |
---|
279 | */ |
---|
280 | read_wmc_Format: function(layerContext, node) { |
---|
281 | var format = { |
---|
282 | value: this.getChildValue(node) |
---|
283 | }; |
---|
284 | if(node.getAttribute("current") == "1") { |
---|
285 | format.current = true; |
---|
286 | } |
---|
287 | layerContext.formats.push(format); |
---|
288 | }, |
---|
289 | |
---|
290 | /** |
---|
291 | * Method: read_wmc_StyleList |
---|
292 | */ |
---|
293 | read_wmc_StyleList: function(layerContext, node) { |
---|
294 | this.runChildNodes(layerContext, node); |
---|
295 | }, |
---|
296 | |
---|
297 | /** |
---|
298 | * Method: read_wmc_Style |
---|
299 | */ |
---|
300 | read_wmc_Style: function(layerContext, node) { |
---|
301 | var style = {}; |
---|
302 | this.runChildNodes(style, node); |
---|
303 | if(node.getAttribute("current") == "1") { |
---|
304 | style.current = true; |
---|
305 | } |
---|
306 | layerContext.styles.push(style); |
---|
307 | }, |
---|
308 | |
---|
309 | /** |
---|
310 | * Method: read_wmc_SLD |
---|
311 | */ |
---|
312 | read_wmc_SLD: function(style, node) { |
---|
313 | this.runChildNodes(style, node); |
---|
314 | // style either comes back with an href or a body property |
---|
315 | }, |
---|
316 | |
---|
317 | /** |
---|
318 | * Method: read_sld_StyledLayerDescriptor |
---|
319 | */ |
---|
320 | read_sld_StyledLayerDescriptor: function(sld, node) { |
---|
321 | var xml = OpenLayers.Format.XML.prototype.write.apply(this, [node]); |
---|
322 | sld.body = xml; |
---|
323 | }, |
---|
324 | |
---|
325 | /** |
---|
326 | * Method: read_wmc_OnlineResource |
---|
327 | */ |
---|
328 | read_wmc_OnlineResource: function(obj, node) { |
---|
329 | obj.href = this.getAttributeNS( |
---|
330 | node, this.namespaces.xlink, "href" |
---|
331 | ); |
---|
332 | }, |
---|
333 | |
---|
334 | /** |
---|
335 | * Method: read_wmc_Name |
---|
336 | */ |
---|
337 | read_wmc_Name: function(obj, node) { |
---|
338 | var name = this.getChildValue(node); |
---|
339 | if(name) { |
---|
340 | obj.name = name; |
---|
341 | } |
---|
342 | }, |
---|
343 | |
---|
344 | /** |
---|
345 | * Method: read_wmc_Title |
---|
346 | */ |
---|
347 | read_wmc_Title: function(obj, node) { |
---|
348 | var title = this.getChildValue(node); |
---|
349 | if(title) { |
---|
350 | obj.title = title; |
---|
351 | } |
---|
352 | }, |
---|
353 | |
---|
354 | /** |
---|
355 | * Method: read_wmc_MetadataURL |
---|
356 | */ |
---|
357 | read_wmc_MetadataURL: function(layerContext, node) { |
---|
358 | var metadataURL = {}; |
---|
359 | var links = node.getElementsByTagName("OnlineResource"); |
---|
360 | if(links.length > 0) { |
---|
361 | this.read_wmc_OnlineResource(metadataURL, links[0]); |
---|
362 | } |
---|
363 | layerContext.metadataURL = metadataURL.href; |
---|
364 | |
---|
365 | }, |
---|
366 | |
---|
367 | /** |
---|
368 | * Method: read_wmc_Abstract |
---|
369 | */ |
---|
370 | read_wmc_Abstract: function(obj, node) { |
---|
371 | var abst = this.getChildValue(node); |
---|
372 | if(abst) { |
---|
373 | obj["abstract"] = abst; |
---|
374 | } |
---|
375 | }, |
---|
376 | |
---|
377 | /** |
---|
378 | * Method: read_wmc_LegendURL |
---|
379 | */ |
---|
380 | read_wmc_LegendURL: function(style, node) { |
---|
381 | var legend = { |
---|
382 | width: node.getAttribute('width'), |
---|
383 | height: node.getAttribute('height') |
---|
384 | }; |
---|
385 | var links = node.getElementsByTagName("OnlineResource"); |
---|
386 | if(links.length > 0) { |
---|
387 | this.read_wmc_OnlineResource(legend, links[0]); |
---|
388 | } |
---|
389 | style.legend = legend; |
---|
390 | }, |
---|
391 | |
---|
392 | /** |
---|
393 | * Method: write |
---|
394 | * |
---|
395 | * Parameters: |
---|
396 | * context - {Object} An object representing the map context. |
---|
397 | * options - {Object} Optional object. |
---|
398 | * |
---|
399 | * Returns: |
---|
400 | * {String} A WMC document string. |
---|
401 | */ |
---|
402 | write: function(context, options) { |
---|
403 | var root = this.createElementDefaultNS("ViewContext"); |
---|
404 | this.setAttributes(root, { |
---|
405 | version: this.VERSION, |
---|
406 | id: (options && typeof options.id == "string") ? |
---|
407 | options.id : |
---|
408 | OpenLayers.Util.createUniqueID("OpenLayers_Context_") |
---|
409 | }); |
---|
410 | |
---|
411 | // add schemaLocation attribute |
---|
412 | this.setAttributeNS( |
---|
413 | root, this.namespaces.xsi, |
---|
414 | "xsi:schemaLocation", this.schemaLocation |
---|
415 | ); |
---|
416 | |
---|
417 | // required General element |
---|
418 | root.appendChild(this.write_wmc_General(context)); |
---|
419 | |
---|
420 | // required LayerList element |
---|
421 | root.appendChild(this.write_wmc_LayerList(context)); |
---|
422 | |
---|
423 | return OpenLayers.Format.XML.prototype.write.apply(this, [root]); |
---|
424 | }, |
---|
425 | |
---|
426 | /** |
---|
427 | * Method: createElementDefaultNS |
---|
428 | * Shorthand for createElementNS with namespace from <defaultPrefix>. |
---|
429 | * Can optionally be used to set attributes and a text child value. |
---|
430 | * |
---|
431 | * Parameters: |
---|
432 | * name - {String} The qualified node name. |
---|
433 | * childValue - {String} Optional value for text child node. |
---|
434 | * attributes - {Object} Optional object representing attributes. |
---|
435 | * |
---|
436 | * Returns: |
---|
437 | * {Element} An element node. |
---|
438 | */ |
---|
439 | createElementDefaultNS: function(name, childValue, attributes) { |
---|
440 | var node = this.createElementNS( |
---|
441 | this.namespaces[this.defaultPrefix], |
---|
442 | name |
---|
443 | ); |
---|
444 | if(childValue) { |
---|
445 | node.appendChild(this.createTextNode(childValue)); |
---|
446 | } |
---|
447 | if(attributes) { |
---|
448 | this.setAttributes(node, attributes); |
---|
449 | } |
---|
450 | return node; |
---|
451 | }, |
---|
452 | |
---|
453 | /** |
---|
454 | * Method: setAttributes |
---|
455 | * Set multiple attributes given key value pairs from an object. |
---|
456 | * |
---|
457 | * Parameters: |
---|
458 | * node - {Element} An element node. |
---|
459 | * obj - {Object} An object whose properties represent attribute names and |
---|
460 | * values represent attribute values. |
---|
461 | */ |
---|
462 | setAttributes: function(node, obj) { |
---|
463 | var value; |
---|
464 | for(var name in obj) { |
---|
465 | value = obj[name].toString(); |
---|
466 | if(value.match(/[A-Z]/)) { |
---|
467 | // safari lowercases attributes with setAttribute |
---|
468 | this.setAttributeNS(node, null, name, value); |
---|
469 | } else { |
---|
470 | node.setAttribute(name, value); |
---|
471 | } |
---|
472 | } |
---|
473 | }, |
---|
474 | |
---|
475 | /** |
---|
476 | * Method: write_wmc_General |
---|
477 | * Create a General node given an context object. |
---|
478 | * |
---|
479 | * Parameters: |
---|
480 | * context - {Object} Context object. |
---|
481 | * |
---|
482 | * Returns: |
---|
483 | * {Element} A WMC General element node. |
---|
484 | */ |
---|
485 | write_wmc_General: function(context) { |
---|
486 | var node = this.createElementDefaultNS("General"); |
---|
487 | |
---|
488 | // optional Window element |
---|
489 | if(context.size) { |
---|
490 | node.appendChild(this.createElementDefaultNS( |
---|
491 | "Window", null, |
---|
492 | { |
---|
493 | width: context.size.w, |
---|
494 | height: context.size.h |
---|
495 | } |
---|
496 | )); |
---|
497 | } |
---|
498 | |
---|
499 | // required BoundingBox element |
---|
500 | var bounds = context.bounds; |
---|
501 | node.appendChild(this.createElementDefaultNS( |
---|
502 | "BoundingBox", null, |
---|
503 | { |
---|
504 | minx: bounds.left.toPrecision(18), |
---|
505 | miny: bounds.bottom.toPrecision(18), |
---|
506 | maxx: bounds.right.toPrecision(18), |
---|
507 | maxy: bounds.top.toPrecision(18), |
---|
508 | SRS: context.projection |
---|
509 | } |
---|
510 | )); |
---|
511 | |
---|
512 | // required Title element |
---|
513 | node.appendChild(this.createElementDefaultNS( |
---|
514 | "Title", context.title |
---|
515 | )); |
---|
516 | |
---|
517 | // OpenLayers specific map properties |
---|
518 | node.appendChild(this.write_ol_MapExtension(context)); |
---|
519 | |
---|
520 | return node; |
---|
521 | }, |
---|
522 | |
---|
523 | /** |
---|
524 | * Method: write_ol_MapExtension |
---|
525 | */ |
---|
526 | write_ol_MapExtension: function(context) { |
---|
527 | var node = this.createElementDefaultNS("Extension"); |
---|
528 | |
---|
529 | var bounds = context.maxExtent; |
---|
530 | if(bounds) { |
---|
531 | var maxExtent = this.createElementNS( |
---|
532 | this.namespaces.ol, "ol:maxExtent" |
---|
533 | ); |
---|
534 | this.setAttributes(maxExtent, { |
---|
535 | minx: bounds.left.toPrecision(18), |
---|
536 | miny: bounds.bottom.toPrecision(18), |
---|
537 | maxx: bounds.right.toPrecision(18), |
---|
538 | maxy: bounds.top.toPrecision(18) |
---|
539 | }); |
---|
540 | node.appendChild(maxExtent); |
---|
541 | } |
---|
542 | |
---|
543 | return node; |
---|
544 | }, |
---|
545 | |
---|
546 | /** |
---|
547 | * Method: write_wmc_LayerList |
---|
548 | * Create a LayerList node given an context object. |
---|
549 | * |
---|
550 | * Parameters: |
---|
551 | * context - {Object} Context object. |
---|
552 | * |
---|
553 | * Returns: |
---|
554 | * {Element} A WMC LayerList element node. |
---|
555 | */ |
---|
556 | write_wmc_LayerList: function(context) { |
---|
557 | var list = this.createElementDefaultNS("LayerList"); |
---|
558 | |
---|
559 | for(var i=0, len=context.layersContext.length; i<len; ++i) { |
---|
560 | list.appendChild(this.write_wmc_Layer(context.layersContext[i])); |
---|
561 | } |
---|
562 | |
---|
563 | return list; |
---|
564 | }, |
---|
565 | |
---|
566 | /** |
---|
567 | * Method: write_wmc_Layer |
---|
568 | * Create a Layer node given a layer context object. |
---|
569 | * |
---|
570 | * Parameters: |
---|
571 | * context - {Object} A layer context object.} |
---|
572 | * |
---|
573 | * Returns: |
---|
574 | * {Element} A WMC Layer element node. |
---|
575 | */ |
---|
576 | write_wmc_Layer: function(context) { |
---|
577 | var node = this.createElementDefaultNS( |
---|
578 | "Layer", null, { |
---|
579 | queryable: context.queryable ? "1" : "0", |
---|
580 | hidden: context.visibility ? "0" : "1" |
---|
581 | } |
---|
582 | ); |
---|
583 | |
---|
584 | // required Server element |
---|
585 | node.appendChild(this.write_wmc_Server(context)); |
---|
586 | |
---|
587 | // required Name element |
---|
588 | node.appendChild(this.createElementDefaultNS( |
---|
589 | "Name", context.name |
---|
590 | )); |
---|
591 | |
---|
592 | // required Title element |
---|
593 | node.appendChild(this.createElementDefaultNS( |
---|
594 | "Title", context.title |
---|
595 | )); |
---|
596 | |
---|
597 | // optional MetadataURL element |
---|
598 | if (context.metadataURL) { |
---|
599 | node.appendChild(this.write_wmc_MetadataURL(context.metadataURL)); |
---|
600 | } |
---|
601 | |
---|
602 | return node; |
---|
603 | }, |
---|
604 | |
---|
605 | /** |
---|
606 | * Method: write_wmc_LayerExtension |
---|
607 | * Add OpenLayers specific layer parameters to an Extension element. |
---|
608 | * |
---|
609 | * Parameters: |
---|
610 | * context - {Object} A layer context object. |
---|
611 | * |
---|
612 | * Returns: |
---|
613 | * {Element} A WMC Extension element (for a layer). |
---|
614 | */ |
---|
615 | write_wmc_LayerExtension: function(context) { |
---|
616 | var node = this.createElementDefaultNS("Extension"); |
---|
617 | |
---|
618 | var bounds = context.maxExtent; |
---|
619 | var maxExtent = this.createElementNS( |
---|
620 | this.namespaces.ol, "ol:maxExtent" |
---|
621 | ); |
---|
622 | this.setAttributes(maxExtent, { |
---|
623 | minx: bounds.left.toPrecision(18), |
---|
624 | miny: bounds.bottom.toPrecision(18), |
---|
625 | maxx: bounds.right.toPrecision(18), |
---|
626 | maxy: bounds.top.toPrecision(18) |
---|
627 | }); |
---|
628 | node.appendChild(maxExtent); |
---|
629 | |
---|
630 | if (context.tileSize && !context.singleTile) { |
---|
631 | var size = this.createElementNS( |
---|
632 | this.namespaces.ol, "ol:tileSize" |
---|
633 | ); |
---|
634 | this.setAttributes(size, context.tileSize); |
---|
635 | node.appendChild(size); |
---|
636 | } |
---|
637 | |
---|
638 | var properties = [ |
---|
639 | "transparent", "numZoomLevels", "units", "isBaseLayer", |
---|
640 | "opacity", "displayInLayerSwitcher", "singleTile" |
---|
641 | ]; |
---|
642 | var child; |
---|
643 | for(var i=0, len=properties.length; i<len; ++i) { |
---|
644 | child = this.createOLPropertyNode(context, properties[i]); |
---|
645 | if(child) { |
---|
646 | node.appendChild(child); |
---|
647 | } |
---|
648 | } |
---|
649 | |
---|
650 | return node; |
---|
651 | }, |
---|
652 | |
---|
653 | /** |
---|
654 | * Method: createOLPropertyNode |
---|
655 | * Create a node representing an OpenLayers property. If the property is |
---|
656 | * null or undefined, null will be returned. |
---|
657 | * |
---|
658 | * Parameters: |
---|
659 | * object - {Object} An object. |
---|
660 | * prop - {String} A property. |
---|
661 | * |
---|
662 | * Returns: |
---|
663 | * {Element} A property node. |
---|
664 | */ |
---|
665 | createOLPropertyNode: function(obj, prop) { |
---|
666 | var node = null; |
---|
667 | if(obj[prop] != null) { |
---|
668 | node = this.createElementNS(this.namespaces.ol, "ol:" + prop); |
---|
669 | node.appendChild(this.createTextNode(obj[prop].toString())); |
---|
670 | } |
---|
671 | return node; |
---|
672 | }, |
---|
673 | |
---|
674 | /** |
---|
675 | * Method: write_wmc_Server |
---|
676 | * Create a Server node given a layer context object. |
---|
677 | * |
---|
678 | * Parameters: |
---|
679 | * context - {Object} Layer context object. |
---|
680 | * |
---|
681 | * Returns: |
---|
682 | * {Element} A WMC Server element node. |
---|
683 | */ |
---|
684 | write_wmc_Server: function(context) { |
---|
685 | var node = this.createElementDefaultNS("Server"); |
---|
686 | this.setAttributes(node, { |
---|
687 | service: "OGC:WMS", |
---|
688 | version: context.version |
---|
689 | }); |
---|
690 | |
---|
691 | // required OnlineResource element |
---|
692 | node.appendChild(this.write_wmc_OnlineResource(context.url)); |
---|
693 | |
---|
694 | return node; |
---|
695 | }, |
---|
696 | |
---|
697 | /** |
---|
698 | * Method: write_wmc_MetadataURL |
---|
699 | * Create a MetadataURL node given a metadataURL string. |
---|
700 | * |
---|
701 | * Parameters: |
---|
702 | * metadataURL - {String} MetadataURL string value. |
---|
703 | * |
---|
704 | * Returns: |
---|
705 | * {Element} A WMC metadataURL element node. |
---|
706 | */ |
---|
707 | write_wmc_MetadataURL: function(metadataURL) { |
---|
708 | var node = this.createElementDefaultNS("MetadataURL"); |
---|
709 | |
---|
710 | // required OnlineResource element |
---|
711 | node.appendChild(this.write_wmc_OnlineResource(metadataURL)); |
---|
712 | |
---|
713 | return node; |
---|
714 | }, |
---|
715 | |
---|
716 | /** |
---|
717 | * Method: write_wmc_FormatList |
---|
718 | * Create a FormatList node given a layer context. |
---|
719 | * |
---|
720 | * Parameters: |
---|
721 | * context - {Object} Layer context object. |
---|
722 | * |
---|
723 | * Returns: |
---|
724 | * {Element} A WMC FormatList element node. |
---|
725 | */ |
---|
726 | write_wmc_FormatList: function(context) { |
---|
727 | var node = this.createElementDefaultNS("FormatList"); |
---|
728 | for (var i=0, len=context.formats.length; i<len; i++) { |
---|
729 | var format = context.formats[i]; |
---|
730 | node.appendChild(this.createElementDefaultNS( |
---|
731 | "Format", |
---|
732 | format.value, |
---|
733 | (format.current && format.current == true) ? |
---|
734 | {current: "1"} : null |
---|
735 | )); |
---|
736 | } |
---|
737 | |
---|
738 | return node; |
---|
739 | }, |
---|
740 | |
---|
741 | /** |
---|
742 | * Method: write_wmc_StyleList |
---|
743 | * Create a StyleList node given a layer context. |
---|
744 | * |
---|
745 | * Parameters: |
---|
746 | * context - {Object} Layer context object. |
---|
747 | * |
---|
748 | * Returns: |
---|
749 | * {Element} A WMC StyleList element node. |
---|
750 | */ |
---|
751 | write_wmc_StyleList: function(layer) { |
---|
752 | var node = this.createElementDefaultNS("StyleList"); |
---|
753 | |
---|
754 | var styles = layer.styles; |
---|
755 | if (styles && styles instanceof Array) { |
---|
756 | var sld; |
---|
757 | for (var i=0, len=styles.length; i<len; i++) { |
---|
758 | var s = styles[i]; |
---|
759 | // three style types to consider |
---|
760 | // [1] linked SLD |
---|
761 | // [2] inline SLD |
---|
762 | // [3] named style |
---|
763 | // running child nodes always gets name, optionally gets href or body |
---|
764 | var style = this.createElementDefaultNS( |
---|
765 | "Style", |
---|
766 | null, |
---|
767 | (s.current && s.current == true) ? |
---|
768 | {current: "1"} : null |
---|
769 | ); |
---|
770 | if(s.href) { // [1] |
---|
771 | sld = this.createElementDefaultNS("SLD"); |
---|
772 | var link = this.write_wmc_OnlineResource(s.href); |
---|
773 | sld.appendChild(link); |
---|
774 | // Name is required. |
---|
775 | sld.appendChild(this.createElementDefaultNS("Name", s.name)); |
---|
776 | // Title is optional. |
---|
777 | if (s.title) { |
---|
778 | sld.appendChild(this.createElementDefaultNS("Title", s.title)); |
---|
779 | } |
---|
780 | style.appendChild(sld); |
---|
781 | } else if(s.body) { // [2] |
---|
782 | sld = this.createElementDefaultNS("SLD"); |
---|
783 | // read in body as xml doc - assume proper namespace declarations |
---|
784 | var doc = OpenLayers.Format.XML.prototype.read.apply(this, [s.body]); |
---|
785 | // append to StyledLayerDescriptor node |
---|
786 | var imported = doc.documentElement; |
---|
787 | if(sld.ownerDocument && sld.ownerDocument.importNode) { |
---|
788 | imported = sld.ownerDocument.importNode(imported, true); |
---|
789 | } |
---|
790 | sld.appendChild(imported); |
---|
791 | // Name is required. |
---|
792 | sld.appendChild(this.createElementDefaultNS("Name", s.name)); |
---|
793 | // Title is optional. |
---|
794 | if (s.title) { |
---|
795 | sld.appendChild(this.createElementDefaultNS("Title", s.title)); |
---|
796 | } |
---|
797 | style.appendChild(sld); |
---|
798 | } else { // [3] |
---|
799 | // both Name and Title are required. |
---|
800 | style.appendChild(this.createElementDefaultNS("Name", s.name)); |
---|
801 | style.appendChild(this.createElementDefaultNS("Title", s.title)); |
---|
802 | // Abstract is optional |
---|
803 | if (s['abstract']) { // abstract is a js keyword |
---|
804 | style.appendChild(this.createElementDefaultNS( |
---|
805 | "Abstract", s['abstract'] |
---|
806 | )); |
---|
807 | } |
---|
808 | } |
---|
809 | node.appendChild(style); |
---|
810 | } |
---|
811 | } |
---|
812 | |
---|
813 | return node; |
---|
814 | }, |
---|
815 | |
---|
816 | /** |
---|
817 | * Method: write_wmc_OnlineResource |
---|
818 | * Create an OnlineResource node given a URL. |
---|
819 | * |
---|
820 | * Parameters: |
---|
821 | * href - {String} URL for the resource. |
---|
822 | * |
---|
823 | * Returns: |
---|
824 | * {Element} A WMC OnlineResource element node. |
---|
825 | */ |
---|
826 | write_wmc_OnlineResource: function(href) { |
---|
827 | var node = this.createElementDefaultNS("OnlineResource"); |
---|
828 | this.setAttributeNS(node, this.namespaces.xlink, "xlink:type", "simple"); |
---|
829 | this.setAttributeNS(node, this.namespaces.xlink, "xlink:href", href); |
---|
830 | return node; |
---|
831 | }, |
---|
832 | |
---|
833 | CLASS_NAME: "OpenLayers.Format.WMC.v1" |
---|
834 | |
---|
835 | }); |
---|