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); |