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Diffstat (limited to 'misc/openlayers/lib/OpenLayers/Format/Text.js')
| -rw-r--r-- | misc/openlayers/lib/OpenLayers/Format/Text.js | 151 |
1 files changed, 151 insertions, 0 deletions
diff --git a/misc/openlayers/lib/OpenLayers/Format/Text.js b/misc/openlayers/lib/OpenLayers/Format/Text.js new file mode 100644 index 0000000..bf9bcd5 --- /dev/null +++ b/misc/openlayers/lib/OpenLayers/Format/Text.js @@ -0,0 +1,151 @@ +/* Copyright (c) 2006-2013 by OpenLayers Contributors (see authors.txt for + * full list of contributors). Published under the 2-clause BSD license. + * See license.txt in the OpenLayers distribution or repository 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.getImageLocation("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: + * text - {String} + * + * Returns: + * Array({<OpenLayers.Feature.Vector>}) + */ + 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" +}); |