| 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
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244 |
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
1×
| // FIXME should handle all geo-referenced data, not just vector data
goog.provide('ol.interaction.DragAndDrop');
goog.provide('ol.interaction.DragAndDropEvent');
goog.require('goog.asserts');
goog.require('goog.events');
goog.require('goog.events.Event');
goog.require('goog.events.FileDropHandler');
goog.require('goog.events.FileDropHandler.EventType');
goog.require('goog.fs.FileReader');
goog.require('goog.functions');
goog.require('ol.interaction.Interaction');
goog.require('ol.proj');
/**
* @classdesc
* Handles input of vector data by drag and drop.
*
* @constructor
* @extends {ol.interaction.Interaction}
* @fires ol.interaction.DragAndDropEvent
* @param {olx.interaction.DragAndDropOptions=} opt_options Options.
* @api stable
*/
ol.interaction.DragAndDrop = function(opt_options) {
var options = opt_options ? opt_options : {};
goog.base(this, {
handleEvent: ol.interaction.DragAndDrop.handleEvent
});
/**
* @private
* @type {Array.<function(new: ol.format.Feature)>}
*/
this.formatConstructors_ = options.formatConstructors ?
options.formatConstructors : [];
/**
* @private
* @type {ol.proj.Projection}
*/
this.projection_ = options.projection ?
ol.proj.get(options.projection) : null;
/**
* @private
* @type {goog.events.FileDropHandler}
*/
this.fileDropHandler_ = null;
/**
* @private
* @type {goog.events.Key|undefined}
*/
this.dropListenKey_ = undefined;
};
goog.inherits(ol.interaction.DragAndDrop, ol.interaction.Interaction);
/**
* @inheritDoc
*/
ol.interaction.DragAndDrop.prototype.disposeInternal = function() {
if (this.dropListenKey_) {
goog.events.unlistenByKey(this.dropListenKey_);
}
goog.base(this, 'disposeInternal');
};
/**
* @param {goog.events.BrowserEvent} event Event.
* @private
*/
ol.interaction.DragAndDrop.prototype.handleDrop_ = function(event) {
var files = event.getBrowserEvent().dataTransfer.files;
var i, ii, file;
for (i = 0, ii = files.length; i < ii; ++i) {
file = files[i];
// The empty string param is a workaround for
// https://code.google.com/p/closure-library/issues/detail?id=524
var reader = goog.fs.FileReader.readAsText(file, '');
reader.addCallback(goog.partial(this.handleResult_, file), this);
}
};
/**
* @param {File} file File.
* @param {string} result Result.
* @private
*/
ol.interaction.DragAndDrop.prototype.handleResult_ = function(file, result) {
var map = this.getMap();
goog.asserts.assert(map, 'map must be set');
var projection = this.projection_;
if (!projection) {
var view = map.getView();
goog.asserts.assert(view, 'map must have view');
projection = view.getProjection();
goog.asserts.assert(projection !== undefined,
'projection should be defined');
}
var formatConstructors = this.formatConstructors_;
var features = [];
var i, ii;
for (i = 0, ii = formatConstructors.length; i < ii; ++i) {
var formatConstructor = formatConstructors[i];
var format = new formatConstructor();
var readFeatures = this.tryReadFeatures_(format, result);
if (readFeatures) {
var featureProjection = format.readProjection(result);
var transform = ol.proj.getTransform(featureProjection, projection);
var j, jj;
for (j = 0, jj = readFeatures.length; j < jj; ++j) {
var feature = readFeatures[j];
var geometry = feature.getGeometry();
if (geometry) {
geometry.applyTransform(transform);
}
features.push(feature);
}
}
}
this.dispatchEvent(
new ol.interaction.DragAndDropEvent(
ol.interaction.DragAndDropEventType.ADD_FEATURES, this, file,
features, projection));
};
/**
* Handles the {@link ol.MapBrowserEvent map browser event} unconditionally and
* neither prevents the browser default nor stops event propagation.
* @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
* @return {boolean} `false` to stop event propagation.
* @this {ol.interaction.DragAndDrop}
* @api
*/
ol.interaction.DragAndDrop.handleEvent = goog.functions.TRUE;
/**
* @inheritDoc
*/
ol.interaction.DragAndDrop.prototype.setMap = function(map) {
if (this.dropListenKey_) {
goog.events.unlistenByKey(this.dropListenKey_);
this.dropListenKey_ = undefined;
}
if (this.fileDropHandler_) {
goog.dispose(this.fileDropHandler_);
this.fileDropHandler_ = null;
}
goog.asserts.assert(this.dropListenKey_ === undefined,
'this.dropListenKey_ should be undefined');
goog.base(this, 'setMap', map);
if (map) {
this.fileDropHandler_ = new goog.events.FileDropHandler(map.getViewport());
this.dropListenKey_ = goog.events.listen(
this.fileDropHandler_, goog.events.FileDropHandler.EventType.DROP,
this.handleDrop_, false, this);
}
};
/**
* @param {ol.format.Feature} format Format.
* @param {string} text Text.
* @private
* @return {Array.<ol.Feature>} Features.
*/
ol.interaction.DragAndDrop.prototype.tryReadFeatures_ = function(format, text) {
try {
return format.readFeatures(text);
} catch (e) {
return null;
}
};
/**
* @enum {string}
*/
ol.interaction.DragAndDropEventType = {
/**
* Triggered when features are added
* @event ol.interaction.DragAndDropEvent#addfeatures
* @api stable
*/
ADD_FEATURES: 'addfeatures'
};
/**
* @classdesc
* Events emitted by {@link ol.interaction.DragAndDrop} instances are instances
* of this type.
*
* @constructor
* @extends {goog.events.Event}
* @implements {oli.interaction.DragAndDropEvent}
* @param {ol.interaction.DragAndDropEventType} type Type.
* @param {Object} target Target.
* @param {File} file File.
* @param {Array.<ol.Feature>=} opt_features Features.
* @param {ol.proj.Projection=} opt_projection Projection.
*/
ol.interaction.DragAndDropEvent =
function(type, target, file, opt_features, opt_projection) {
goog.base(this, type, target);
/**
* The features parsed from dropped data.
* @type {Array.<ol.Feature>|undefined}
* @api stable
*/
this.features = opt_features;
/**
* The dropped file.
* @type {File}
* @api stable
*/
this.file = file;
/**
* The feature projection.
* @type {ol.proj.Projection|undefined}
* @api
*/
this.projection = opt_projection;
};
goog.inherits(ol.interaction.DragAndDropEvent, goog.events.Event);
|