09e0d3ec81
git-svn-id: http://svn.openlayers.org/trunk/openlayers@5614 dc9f47b5-9b13-0410-9fdd-eb0c1a62fdaf
114 lines
4.9 KiB
JavaScript
114 lines
4.9 KiB
JavaScript
/* Copyright (c) 2006-2008 MetaCarta, Inc., published under a modified BSD license.
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* See http://svn.openlayers.org/trunk/openlayers/repository-license.txt
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* for the full text of the license. */
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/**
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* @requires OpenLayers/Feature/Vector.js
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* @requires OpenLayers/Geometry/Point.js
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*/
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/**
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* Class: OpenLayers.Format.Text
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* Read Text format. Create a new instance with the <OpenLayers.Format.Text>
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* constructor. This reads text which is formatted like CSV text, using
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* tabs as the seperator by default. It provides parsing of data originally
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* used in the MapViewerService, described on the wiki. This Format is used
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* by the <OpenLayers.Layer.Text> class.
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*
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* Inherits from:
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* - <OpenLayers.Format>
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*/
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OpenLayers.Format.Text = OpenLayers.Class(OpenLayers.Format, {
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/**
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* Constructor: OpenLayers.Format.Text
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* Create a new parser for TSV Text.
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*
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* Parameters:
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* options - {Object} An optional object whose properties will be set on
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* this instance.
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*/
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initialize: function(options) {
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OpenLayers.Format.prototype.initialize.apply(this, [options]);
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},
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/**
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* APIMethod: read
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* Return a list of features from a Tab Seperated Values text string.
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*
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* Parameters:
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* data - {String}
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*
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* Returns:
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* An Array of <OpenLayers.Feature.Vector>s
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*/
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read: function(text) {
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var lines = text.split('\n');
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var columns;
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var features = [];
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// length - 1 to allow for trailing new line
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for (var lcv = 0; lcv < (lines.length - 1); lcv++) {
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var currLine = lines[lcv].replace(/^\s*/,'').replace(/\s*$/,'');
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if (currLine.charAt(0) != '#') { /* not a comment */
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if (!columns) {
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//First line is columns
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columns = currLine.split('\t');
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} else {
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var vals = currLine.split('\t');
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var geometry = new OpenLayers.Geometry.Point(0,0);
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var attributes = {};
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var style = {};
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var icon, iconSize, iconOffset, overflow;
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var set = false;
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for (var valIndex = 0; valIndex < vals.length; valIndex++) {
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if (vals[valIndex]) {
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if (columns[valIndex] == 'point') {
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var coords = vals[valIndex].split(',');
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geometry.y = parseFloat(coords[0]);
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geometry.x = parseFloat(coords[1]);
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set = true;
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} else if (columns[valIndex] == 'lat') {
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geometry.y = parseFloat(vals[valIndex]);
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set = true;
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} else if (columns[valIndex] == 'lon') {
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geometry.x = parseFloat(vals[valIndex]);
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set = true;
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} else if (columns[valIndex] == 'title')
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attributes['title'] = vals[valIndex];
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else if (columns[valIndex] == 'image' ||
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columns[valIndex] == 'icon')
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style['externalGraphic'] = vals[valIndex];
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else if (columns[valIndex] == 'iconSize') {
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var size = vals[valIndex].split(',');
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style['graphicWidth'] = parseFloat(size[0]);
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style['graphicHeight'] = parseFloat(size[1]);
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} else if (columns[valIndex] == 'iconOffset') {
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var offset = vals[valIndex].split(',');
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style['graphicXOffset'] = parseFloat(offset[0]);
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style['graphicYOffset'] = parseFloat(offset[1]);
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} else if (columns[valIndex] == 'description') {
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attributes['description'] = vals[valIndex];
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} else if (columns[valIndex] == 'overflow') {
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attributes['overflow'] = vals[valIndex];
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}
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}
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}
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if (set) {
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if (this.internalProjection && this.externalProjection) {
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geometry.transform(this.externalProjection,
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this.internalProjection);
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}
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var feature = new OpenLayers.Feature.Vector(geometry, attributes, style);
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features.push(feature);
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}
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}
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}
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}
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return features;
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},
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CLASS_NAME: "OpenLayers.Format.Text"
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});
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