d91858bd5d0243ba29c7676805ee25bc0eaa869d.svn-base
6.51 KB
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
/* Copyright (c) 2006-2011 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"
});