| /* Copyright (c) 2006-2010 by OpenLayers Contributors (see authors.txt for | |
| * full list of contributors). Published under the Clear BSD license. | |
| * See http://svn.openlayers.org/trunk/openlayers/license.txt for the | |
| * full text of the license. */ | |
| /** | |
| * @requires OpenLayers/Feature/Vector.js | |
| * @requires OpenLayers/Geometry/Point.js | |
| */ | |
| /** | |
| * Class: OpenLayers.Format.Text | |
| * Read Text format. Create a new instance with the <OpenLayers.Format.Text> | |
| * constructor. This reads text which is formatted like CSV text, using | |
| * tabs as the seperator by default. It provides parsing of data originally | |
| * used in the MapViewerService, described on the wiki. This Format is used | |
| * by the <OpenLayers.Layer.Text> class. | |
| * | |
| * Inherits from: | |
| * - <OpenLayers.Format> | |
| */ | |
| OpenLayers.Format.Text = OpenLayers.Class(OpenLayers.Format, { | |
| /** | |
| * APIProperty: defaultStyle | |
| * defaultStyle allows one to control the default styling of the features. | |
| * It should be a symbolizer hash. By default, this is set to match the | |
| * Layer.Text behavior, which is to use the default OpenLayers Icon. | |
| */ | |
| defaultStyle: null, | |
| /** | |
| * APIProperty: extractStyles | |
| * set to true to extract styles from the TSV files, using information | |
| * from the image or icon, iconSize and iconOffset fields. This will result | |
| * in features with a symbolizer (style) property set, using the | |
| * default symbolizer specified in <defaultStyle>. Set to false if you | |
| * wish to use a styleMap or OpenLayers.Style options to style your | |
| * layer instead. | |
| */ | |
| extractStyles: true, | |
| /** | |
| * Constructor: OpenLayers.Format.Text | |
| * Create a new parser for TSV Text. | |
| * | |
| * Parameters: | |
| * options - {Object} An optional object whose properties will be set on | |
| * this instance. | |
| */ | |
| initialize: function(options) { | |
| options = options || {}; | |
| if(options.extractStyles !== false) { | |
| options.defaultStyle = { | |
| 'externalGraphic': OpenLayers.Util.getImagesLocation() + | |
| "marker.png", | |
| 'graphicWidth': 21, | |
| 'graphicHeight': 25, | |
| 'graphicXOffset': -10.5, | |
| 'graphicYOffset': -12.5 | |
| }; | |
| } | |
| OpenLayers.Format.prototype.initialize.apply(this, [options]); | |
| }, | |
| /** | |
| * APIMethod: read | |
| * Return a list of features from a Tab Seperated Values text string. | |
| * | |
| * Parameters: | |
| * data - {String} | |
| * | |
| * Returns: | |
| * An Array of <OpenLayers.Feature.Vector>s | |
| */ | |
| read: function(text) { | |
| var lines = text.split('\n'); | |
| var columns; | |
| var features = []; | |
| // length - 1 to allow for trailing new line | |
| for (var lcv = 0; lcv < (lines.length - 1); lcv++) { | |
| var currLine = lines[lcv].replace(/^\s*/,'').replace(/\s*$/,''); | |
| if (currLine.charAt(0) != '#') { /* not a comment */ | |
| if (!columns) { | |
| //First line is columns | |
| columns = currLine.split('\t'); | |
| } else { | |
| var vals = currLine.split('\t'); | |
| var geometry = new OpenLayers.Geometry.Point(0,0); | |
| var attributes = {}; | |
| var style = this.defaultStyle ? | |
| OpenLayers.Util.applyDefaults({}, this.defaultStyle) : | |
| null; | |
| var icon, iconSize, iconOffset, overflow; | |
| var set = false; | |
| for (var valIndex = 0; valIndex < vals.length; valIndex++) { | |
| if (vals[valIndex]) { | |
| if (columns[valIndex] == 'point') { | |
| var coords = vals[valIndex].split(','); | |
| geometry.y = parseFloat(coords[0]); | |
| geometry.x = parseFloat(coords[1]); | |
| set = true; | |
| } else if (columns[valIndex] == 'lat') { | |
| geometry.y = parseFloat(vals[valIndex]); | |
| set = true; | |
| } else if (columns[valIndex] == 'lon') { | |
| geometry.x = parseFloat(vals[valIndex]); | |
| set = true; | |
| } else if (columns[valIndex] == 'title') | |
| attributes['title'] = vals[valIndex]; | |
| else if (columns[valIndex] == 'image' || | |
| columns[valIndex] == 'icon' && style) { | |
| style['externalGraphic'] = vals[valIndex]; | |
| } else if (columns[valIndex] == 'iconSize' && style) { | |
| var size = vals[valIndex].split(','); | |
| style['graphicWidth'] = parseFloat(size[0]); | |
| style['graphicHeight'] = parseFloat(size[1]); | |
| } else if (columns[valIndex] == 'iconOffset' && style) { | |
| var offset = vals[valIndex].split(','); | |
| style['graphicXOffset'] = parseFloat(offset[0]); | |
| style['graphicYOffset'] = parseFloat(offset[1]); | |
| } else if (columns[valIndex] == 'description') { | |
| attributes['description'] = vals[valIndex]; | |
| } else if (columns[valIndex] == 'overflow') { | |
| attributes['overflow'] = vals[valIndex]; | |
| } else { | |
| // For StyleMap filtering, allow additional | |
| // columns to be stored as attributes. | |
| attributes[columns[valIndex]] = vals[valIndex]; | |
| } | |
| } | |
| } | |
| if (set) { | |
| if (this.internalProjection && this.externalProjection) { | |
| geometry.transform(this.externalProjection, | |
| this.internalProjection); | |
| } | |
| var feature = new OpenLayers.Feature.Vector(geometry, attributes, style); | |
| features.push(feature); | |
| } | |
| } | |
| } | |
| } | |
| return features; | |
| }, | |
| CLASS_NAME: "OpenLayers.Format.Text" | |
| }); | |