openlayers
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Build tools and sources for developing OpenLayers based mapping applications
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JavaScript
goog.provide('ol.interaction.Modify');
goog.require('ol');
goog.require('ol.Collection');
goog.require('ol.Feature');
goog.require('ol.MapBrowserEvent');
goog.require('ol.MapBrowserPointerEvent');
goog.require('ol.View');
goog.require('ol.array');
goog.require('ol.coordinate');
goog.require('ol.events');
goog.require('ol.events.Event');
goog.require('ol.events.EventType');
goog.require('ol.events.condition');
goog.require('ol.extent');
goog.require('ol.geom.GeometryType');
goog.require('ol.geom.Point');
goog.require('ol.interaction.Pointer');
goog.require('ol.layer.Vector');
goog.require('ol.source.Vector');
goog.require('ol.structs.RBush');
goog.require('ol.style.Style');
/**
* @classdesc
* Interaction for modifying feature geometries.
*
* @constructor
* @extends {ol.interaction.Pointer}
* @param {olx.interaction.ModifyOptions} options Options.
* @fires ol.interaction.Modify.Event
* @api
*/
ol.interaction.Modify = function(options) {
ol.interaction.Pointer.call(this, {
handleDownEvent: ol.interaction.Modify.handleDownEvent_,
handleDragEvent: ol.interaction.Modify.handleDragEvent_,
handleEvent: ol.interaction.Modify.handleEvent,
handleUpEvent: ol.interaction.Modify.handleUpEvent_
});
/**
* @private
* @type {ol.EventsConditionType}
*/
this.condition_ = options.condition ?
options.condition : ol.events.condition.primaryAction;
/**
* @private
* @param {ol.MapBrowserEvent} mapBrowserEvent Browser event.
* @return {boolean} Combined condition result.
*/
this.defaultDeleteCondition_ = function(mapBrowserEvent) {
return ol.events.condition.noModifierKeys(mapBrowserEvent) &&
ol.events.condition.singleClick(mapBrowserEvent);
};
/**
* @type {ol.EventsConditionType}
* @private
*/
this.deleteCondition_ = options.deleteCondition ?
options.deleteCondition : this.defaultDeleteCondition_;
/**
* Editing vertex.
* @type {ol.Feature}
* @private
*/
this.vertexFeature_ = null;
/**
* Segments intersecting {@link this.vertexFeature_} by segment uid.
* @type {Object.<string, boolean>}
* @private
*/
this.vertexSegments_ = null;
/**
* @type {ol.Pixel}
* @private
*/
this.lastPixel_ = [0, 0];
/**
* Tracks if the next `singleclick` event should be ignored to prevent
* accidental deletion right after vertex creation.
* @type {boolean}
* @private
*/
this.ignoreNextSingleClick_ = false;
/**
* @type {boolean}
* @private
*/
this.modified_ = false;
/**
* Segment RTree for each layer
* @type {ol.structs.RBush.<ol.ModifySegmentDataType>}
* @private
*/
this.rBush_ = new ol.structs.RBush();
/**
* @type {number}
* @private
*/
this.pixelTolerance_ = options.pixelTolerance !== undefined ?
options.pixelTolerance : 10;
/**
* @type {boolean}
* @private
*/
this.snappedToVertex_ = false;
/**
* Indicate whether the interaction is currently changing a feature's
* coordinates.
* @type {boolean}
* @private
*/
this.changingFeature_ = false;
/**
* @type {Array}
* @private
*/
this.dragSegments_ = [];
/**
* Draw overlay where sketch features are drawn.
* @type {ol.layer.Vector}
* @private
*/
this.overlay_ = new ol.layer.Vector({
source: new ol.source.Vector({
useSpatialIndex: false,
wrapX: !!options.wrapX
}),
style: options.style ? options.style :
ol.interaction.Modify.getDefaultStyleFunction(),
updateWhileAnimating: true,
updateWhileInteracting: true
});
/**
* @const
* @private
* @type {Object.<string, function(ol.Feature, ol.geom.Geometry)>}
*/
this.SEGMENT_WRITERS_ = {
'Point': this.writePointGeometry_,
'LineString': this.writeLineStringGeometry_,
'LinearRing': this.writeLineStringGeometry_,
'Polygon': this.writePolygonGeometry_,
'MultiPoint': this.writeMultiPointGeometry_,
'MultiLineString': this.writeMultiLineStringGeometry_,
'MultiPolygon': this.writeMultiPolygonGeometry_,
'GeometryCollection': this.writeGeometryCollectionGeometry_
};
/**
* @type {ol.Collection.<ol.Feature>}
* @private
*/
this.features_ = options.features;
this.features_.forEach(this.addFeature_, this);
ol.events.listen(this.features_, ol.Collection.EventType.ADD,
this.handleFeatureAdd_, this);
ol.events.listen(this.features_, ol.Collection.EventType.REMOVE,
this.handleFeatureRemove_, this);
/**
* @type {ol.MapBrowserPointerEvent}
* @private
*/
this.lastPointerEvent_ = null;
};
ol.inherits(ol.interaction.Modify, ol.interaction.Pointer);
/**
* @param {ol.Feature} feature Feature.
* @private
*/
ol.interaction.Modify.prototype.addFeature_ = function(feature) {
var geometry = feature.getGeometry();
if (geometry && geometry.getType() in this.SEGMENT_WRITERS_) {
this.SEGMENT_WRITERS_[geometry.getType()].call(this, feature, geometry);
}
var map = this.getMap();
if (map && map.isRendered()) {
this.handlePointerAtPixel_(this.lastPixel_, map);
}
ol.events.listen(feature, ol.events.EventType.CHANGE,
this.handleFeatureChange_, this);
};
/**
* @param {ol.MapBrowserPointerEvent} evt Map browser event
* @private
*/
ol.interaction.Modify.prototype.willModifyFeatures_ = function(evt) {
if (!this.modified_) {
this.modified_ = true;
this.dispatchEvent(new ol.interaction.Modify.Event(
ol.interaction.Modify.EventType.MODIFYSTART, this.features_, evt));
}
};
/**
* @param {ol.Feature} feature Feature.
* @private
*/
ol.interaction.Modify.prototype.removeFeature_ = function(feature) {
this.removeFeatureSegmentData_(feature);
// Remove the vertex feature if the collection of canditate features
// is empty.
if (this.vertexFeature_ && this.features_.getLength() === 0) {
this.overlay_.getSource().removeFeature(this.vertexFeature_);
this.vertexFeature_ = null;
}
ol.events.unlisten(feature, ol.events.EventType.CHANGE,
this.handleFeatureChange_, this);
};
/**
* @param {ol.Feature} feature Feature.
* @private
*/
ol.interaction.Modify.prototype.removeFeatureSegmentData_ = function(feature) {
var rBush = this.rBush_;
var /** @type {Array.<ol.ModifySegmentDataType>} */ nodesToRemove = [];
rBush.forEach(
/**
* @param {ol.ModifySegmentDataType} node RTree node.
*/
function(node) {
if (feature === node.feature) {
nodesToRemove.push(node);
}
});
for (var i = nodesToRemove.length - 1; i >= 0; --i) {
rBush.remove(nodesToRemove[i]);
}
};
/**
* @inheritDoc
*/
ol.interaction.Modify.prototype.setActive = function(active) {
if (this.vertexFeature_ && !active) {
this.overlay_.getSource().removeFeature(this.vertexFeature_);
this.vertexFeature_ = null;
}
ol.interaction.Pointer.prototype.setActive.call(this, active);
};
/**
* @inheritDoc
*/
ol.interaction.Modify.prototype.setMap = function(map) {
this.overlay_.setMap(map);
ol.interaction.Pointer.prototype.setMap.call(this, map);
};
/**
* @param {ol.Collection.Event} evt Event.
* @private
*/
ol.interaction.Modify.prototype.handleFeatureAdd_ = function(evt) {
this.addFeature_(/** @type {ol.Feature} */ (evt.element));
};
/**
* @param {ol.events.Event} evt Event.
* @private
*/
ol.interaction.Modify.prototype.handleFeatureChange_ = function(evt) {
if (!this.changingFeature_) {
var feature = /** @type {ol.Feature} */ (evt.target);
this.removeFeature_(feature);
this.addFeature_(feature);
}
};
/**
* @param {ol.Collection.Event} evt Event.
* @private
*/
ol.interaction.Modify.prototype.handleFeatureRemove_ = function(evt) {
var feature = /** @type {ol.Feature} */ (evt.element);
this.removeFeature_(feature);
};
/**
* @param {ol.Feature} feature Feature
* @param {ol.geom.Point} geometry Geometry.
* @private
*/
ol.interaction.Modify.prototype.writePointGeometry_ = function(feature, geometry) {
var coordinates = geometry.getCoordinates();
var segmentData = /** @type {ol.ModifySegmentDataType} */ ({
feature: feature,
geometry: geometry,
segment: [coordinates, coordinates]
});
this.rBush_.insert(geometry.getExtent(), segmentData);
};
/**
* @param {ol.Feature} feature Feature
* @param {ol.geom.MultiPoint} geometry Geometry.
* @private
*/
ol.interaction.Modify.prototype.writeMultiPointGeometry_ = function(feature, geometry) {
var points = geometry.getCoordinates();
var coordinates, i, ii, segmentData;
for (i = 0, ii = points.length; i < ii; ++i) {
coordinates = points[i];
segmentData = /** @type {ol.ModifySegmentDataType} */ ({
feature: feature,
geometry: geometry,
depth: [i],
index: i,
segment: [coordinates, coordinates]
});
this.rBush_.insert(geometry.getExtent(), segmentData);
}
};
/**
* @param {ol.Feature} feature Feature
* @param {ol.geom.LineString} geometry Geometry.
* @private
*/
ol.interaction.Modify.prototype.writeLineStringGeometry_ = function(feature, geometry) {
var coordinates = geometry.getCoordinates();
var i, ii, segment, segmentData;
for (i = 0, ii = coordinates.length - 1; i < ii; ++i) {
segment = coordinates.slice(i, i + 2);
segmentData = /** @type {ol.ModifySegmentDataType} */ ({
feature: feature,
geometry: geometry,
index: i,
segment: segment
});
this.rBush_.insert(ol.extent.boundingExtent(segment), segmentData);
}
};
/**
* @param {ol.Feature} feature Feature
* @param {ol.geom.MultiLineString} geometry Geometry.
* @private
*/
ol.interaction.Modify.prototype.writeMultiLineStringGeometry_ = function(feature, geometry) {
var lines = geometry.getCoordinates();
var coordinates, i, ii, j, jj, segment, segmentData;
for (j = 0, jj = lines.length; j < jj; ++j) {
coordinates = lines[j];
for (i = 0, ii = coordinates.length - 1; i < ii; ++i) {
segment = coordinates.slice(i, i + 2);
segmentData = /** @type {ol.ModifySegmentDataType} */ ({
feature: feature,
geometry: geometry,
depth: [j],
index: i,
segment: segment
});
this.rBush_.insert(ol.extent.boundingExtent(segment), segmentData);
}
}
};
/**
* @param {ol.Feature} feature Feature
* @param {ol.geom.Polygon} geometry Geometry.
* @private
*/
ol.interaction.Modify.prototype.writePolygonGeometry_ = function(feature, geometry) {
var rings = geometry.getCoordinates();
var coordinates, i, ii, j, jj, segment, segmentData;
for (j = 0, jj = rings.length; j < jj; ++j) {
coordinates = rings[j];
for (i = 0, ii = coordinates.length - 1; i < ii; ++i) {
segment = coordinates.slice(i, i + 2);
segmentData = /** @type {ol.ModifySegmentDataType} */ ({
feature: feature,
geometry: geometry,
depth: [j],
index: i,
segment: segment
});
this.rBush_.insert(ol.extent.boundingExtent(segment), segmentData);
}
}
};
/**
* @param {ol.Feature} feature Feature
* @param {ol.geom.MultiPolygon} geometry Geometry.
* @private
*/
ol.interaction.Modify.prototype.writeMultiPolygonGeometry_ = function(feature, geometry) {
var polygons = geometry.getCoordinates();
var coordinates, i, ii, j, jj, k, kk, rings, segment, segmentData;
for (k = 0, kk = polygons.length; k < kk; ++k) {
rings = polygons[k];
for (j = 0, jj = rings.length; j < jj; ++j) {
coordinates = rings[j];
for (i = 0, ii = coordinates.length - 1; i < ii; ++i) {
segment = coordinates.slice(i, i + 2);
segmentData = /** @type {ol.ModifySegmentDataType} */ ({
feature: feature,
geometry: geometry,
depth: [j, k],
index: i,
segment: segment
});
this.rBush_.insert(ol.extent.boundingExtent(segment), segmentData);
}
}
}
};
/**
* @param {ol.Feature} feature Feature
* @param {ol.geom.GeometryCollection} geometry Geometry.
* @private
*/
ol.interaction.Modify.prototype.writeGeometryCollectionGeometry_ = function(feature, geometry) {
var i, geometries = geometry.getGeometriesArray();
for (i = 0; i < geometries.length; ++i) {
this.SEGMENT_WRITERS_[geometries[i].getType()].call(
this, feature, geometries[i]);
}
};
/**
* @param {ol.Coordinate} coordinates Coordinates.
* @return {ol.Feature} Vertex feature.
* @private
*/
ol.interaction.Modify.prototype.createOrUpdateVertexFeature_ = function(coordinates) {
var vertexFeature = this.vertexFeature_;
if (!vertexFeature) {
vertexFeature = new ol.Feature(new ol.geom.Point(coordinates));
this.vertexFeature_ = vertexFeature;
this.overlay_.getSource().addFeature(vertexFeature);
} else {
var geometry = /** @type {ol.geom.Point} */ (vertexFeature.getGeometry());
geometry.setCoordinates(coordinates);
}
return vertexFeature;
};
/**
* @param {ol.ModifySegmentDataType} a The first segment data.
* @param {ol.ModifySegmentDataType} b The second segment data.
* @return {number} The difference in indexes.
* @private
*/
ol.interaction.Modify.compareIndexes_ = function(a, b) {
return a.index - b.index;
};
/**
* @param {ol.MapBrowserPointerEvent} evt Event.
* @return {boolean} Start drag sequence?
* @this {ol.interaction.Modify}
* @private
*/
ol.interaction.Modify.handleDownEvent_ = function(evt) {
if (!this.condition_(evt)) {
return false;
}
this.handlePointerAtPixel_(evt.pixel, evt.map);
this.dragSegments_.length = 0;
this.modified_ = false;
var vertexFeature = this.vertexFeature_;
if (vertexFeature) {
var insertVertices = [];
var geometry = /** @type {ol.geom.Point} */ (vertexFeature.getGeometry());
var vertex = geometry.getCoordinates();
var vertexExtent = ol.extent.boundingExtent([vertex]);
var segmentDataMatches = this.rBush_.getInExtent(vertexExtent);
var componentSegments = {};
segmentDataMatches.sort(ol.interaction.Modify.compareIndexes_);
for (var i = 0, ii = segmentDataMatches.length; i < ii; ++i) {
var segmentDataMatch = segmentDataMatches[i];
var segment = segmentDataMatch.segment;
var uid = ol.getUid(segmentDataMatch.feature);
var depth = segmentDataMatch.depth;
if (depth) {
uid += '-' + depth.join('-'); // separate feature components
}
if (!componentSegments[uid]) {
componentSegments[uid] = new Array(2);
}
if (ol.coordinate.equals(segment[0], vertex) &&
!componentSegments[uid][0]) {
this.dragSegments_.push([segmentDataMatch, 0]);
componentSegments[uid][0] = segmentDataMatch;
} else if (ol.coordinate.equals(segment[1], vertex) &&
!componentSegments[uid][1]) {
// prevent dragging closed linestrings by the connecting node
if ((segmentDataMatch.geometry.getType() ===
ol.geom.GeometryType.LINE_STRING ||
segmentDataMatch.geometry.getType() ===
ol.geom.GeometryType.MULTI_LINE_STRING) &&
componentSegments[uid][0] &&
componentSegments[uid][0].index === 0) {
continue;
}
this.dragSegments_.push([segmentDataMatch, 1]);
componentSegments[uid][1] = segmentDataMatch;
} else if (ol.getUid(segment) in this.vertexSegments_ &&
(!componentSegments[uid][0] && !componentSegments[uid][1])) {
insertVertices.push([segmentDataMatch, vertex]);
}
}
if (insertVertices.length) {
this.willModifyFeatures_(evt);
}
for (var j = insertVertices.length - 1; j >= 0; --j) {
this.insertVertex_.apply(this, insertVertices[j]);
}
}
return !!this.vertexFeature_;
};
/**
* @param {ol.MapBrowserPointerEvent} evt Event.
* @this {ol.interaction.Modify}
* @private
*/
ol.interaction.Modify.handleDragEvent_ = function(evt) {
this.ignoreNextSingleClick_ = false;
this.willModifyFeatures_(evt);
var vertex = evt.coordinate;
for (var i = 0, ii = this.dragSegments_.length; i < ii; ++i) {
var dragSegment = this.dragSegments_[i];
var segmentData = dragSegment[0];
var depth = segmentData.depth;
var geometry = segmentData.geometry;
var coordinates = geometry.getCoordinates();
var segment = segmentData.segment;
var index = dragSegment[1];
while (vertex.length < geometry.getStride()) {
vertex.push(segment[index][vertex.length]);
}
switch (geometry.getType()) {
case ol.geom.GeometryType.POINT:
coordinates = vertex;
segment[0] = segment[1] = vertex;
break;
case ol.geom.GeometryType.MULTI_POINT:
coordinates[segmentData.index] = vertex;
segment[0] = segment[1] = vertex;
break;
case ol.geom.GeometryType.LINE_STRING:
coordinates[segmentData.index + index] = vertex;
segment[index] = vertex;
break;
case ol.geom.GeometryType.MULTI_LINE_STRING:
coordinates[depth[0]][segmentData.index + index] = vertex;
segment[index] = vertex;
break;
case ol.geom.GeometryType.POLYGON:
coordinates[depth[0]][segmentData.index + index] = vertex;
segment[index] = vertex;
break;
case ol.geom.GeometryType.MULTI_POLYGON:
coordinates[depth[1]][depth[0]][segmentData.index + index] = vertex;
segment[index] = vertex;
break;
default:
// pass
}
this.setGeometryCoordinates_(geometry, coordinates);
}
this.createOrUpdateVertexFeature_(vertex);
};
/**
* @param {ol.MapBrowserPointerEvent} evt Event.
* @return {boolean} Stop drag sequence?
* @this {ol.interaction.Modify}
* @private
*/
ol.interaction.Modify.handleUpEvent_ = function(evt) {
var segmentData;
for (var i = this.dragSegments_.length - 1; i >= 0; --i) {
segmentData = this.dragSegments_[i][0];
this.rBush_.update(ol.extent.boundingExtent(segmentData.segment),
segmentData);
}
if (this.modified_) {
this.dispatchEvent(new ol.interaction.Modify.Event(
ol.interaction.Modify.EventType.MODIFYEND, this.features_, evt));
this.modified_ = false;
}
return false;
};
/**
* Handles the {@link ol.MapBrowserEvent map browser event} and may modify the
* geometry.
* @param {ol.MapBrowserEvent} mapBrowserEvent Map browser event.
* @return {boolean} `false` to stop event propagation.
* @this {ol.interaction.Modify}
* @api
*/
ol.interaction.Modify.handleEvent = function(mapBrowserEvent) {
if (!(mapBrowserEvent instanceof ol.MapBrowserPointerEvent)) {
return true;
}
this.lastPointerEvent_ = mapBrowserEvent;
var handled;
if (!mapBrowserEvent.map.getView().getHints()[ol.View.Hint.INTERACTING] &&
mapBrowserEvent.type == ol.MapBrowserEvent.EventType.POINTERMOVE &&
!this.handlingDownUpSequence) {
this.handlePointerMove_(mapBrowserEvent);
}
if (this.vertexFeature_ && this.deleteCondition_(mapBrowserEvent)) {
if (mapBrowserEvent.type != ol.MapBrowserEvent.EventType.SINGLECLICK ||
!this.ignoreNextSingleClick_) {
handled = this.removePoint();
} else {
handled = true;
}
}
if (mapBrowserEvent.type == ol.MapBrowserEvent.EventType.SINGLECLICK) {
this.ignoreNextSingleClick_ = false;
}
return ol.interaction.Pointer.handleEvent.call(this, mapBrowserEvent) &&
!handled;
};
/**
* @param {ol.MapBrowserEvent} evt Event.
* @private
*/
ol.interaction.Modify.prototype.handlePointerMove_ = function(evt) {
this.lastPixel_ = evt.pixel;
this.handlePointerAtPixel_(evt.pixel, evt.map);
};
/**
* @param {ol.Pixel} pixel Pixel
* @param {ol.Map} map Map.
* @private
*/
ol.interaction.Modify.prototype.handlePointerAtPixel_ = function(pixel, map) {
var pixelCoordinate = map.getCoordinateFromPixel(pixel);
var sortByDistance = function(a, b) {
return ol.coordinate.squaredDistanceToSegment(pixelCoordinate, a.segment) -
ol.coordinate.squaredDistanceToSegment(pixelCoordinate, b.segment);
};
var box = ol.extent.buffer(
ol.extent.createOrUpdateFromCoordinate(pixelCoordinate),
map.getView().getResolution() * this.pixelTolerance_);
var rBush = this.rBush_;
var nodes = rBush.getInExtent(box);
if (nodes.length > 0) {
nodes.sort(sortByDistance);
var node = nodes[0];
var closestSegment = node.segment;
var vertex = (ol.coordinate.closestOnSegment(pixelCoordinate,
closestSegment));
var vertexPixel = map.getPixelFromCoordinate(vertex);
if (Math.sqrt(ol.coordinate.squaredDistance(pixel, vertexPixel)) <=
this.pixelTolerance_) {
var pixel1 = map.getPixelFromCoordinate(closestSegment[0]);
var pixel2 = map.getPixelFromCoordinate(closestSegment[1]);
var squaredDist1 = ol.coordinate.squaredDistance(vertexPixel, pixel1);
var squaredDist2 = ol.coordinate.squaredDistance(vertexPixel, pixel2);
var dist = Math.sqrt(Math.min(squaredDist1, squaredDist2));
this.snappedToVertex_ = dist <= this.pixelTolerance_;
if (this.snappedToVertex_) {
vertex = squaredDist1 > squaredDist2 ?
closestSegment[1] : closestSegment[0];
}
this.createOrUpdateVertexFeature_(vertex);
var vertexSegments = {};
vertexSegments[ol.getUid(closestSegment)] = true;
var segment;
for (var i = 1, ii = nodes.length; i < ii; ++i) {
segment = nodes[i].segment;
if ((ol.coordinate.equals(closestSegment[0], segment[0]) &&
ol.coordinate.equals(closestSegment[1], segment[1]) ||
(ol.coordinate.equals(closestSegment[0], segment[1]) &&
ol.coordinate.equals(closestSegment[1], segment[0])))) {
vertexSegments[ol.getUid(segment)] = true;
} else {
break;
}
}
this.vertexSegments_ = vertexSegments;
return;
}
}
if (this.vertexFeature_) {
this.overlay_.getSource().removeFeature(this.vertexFeature_);
this.vertexFeature_ = null;
}
};
/**
* @param {ol.ModifySegmentDataType} segmentData Segment data.
* @param {ol.Coordinate} vertex Vertex.
* @private
*/
ol.interaction.Modify.prototype.insertVertex_ = function(segmentData, vertex) {
var segment = segmentData.segment;
var feature = segmentData.feature;
var geometry = segmentData.geometry;
var depth = segmentData.depth;
var index = /** @type {number} */ (segmentData.index);
var coordinates;
while (vertex.length < geometry.getStride()) {
vertex.push(0);
}
switch (geometry.getType()) {
case ol.geom.GeometryType.MULTI_LINE_STRING:
coordinates = geometry.getCoordinates();
coordinates[depth[0]].splice(index + 1, 0, vertex);
break;
case ol.geom.GeometryType.POLYGON:
coordinates = geometry.getCoordinates();
coordinates[depth[0]].splice(index + 1, 0, vertex);
break;
case ol.geom.GeometryType.MULTI_POLYGON:
coordinates = geometry.getCoordinates();
coordinates[depth[1]][depth[0]].splice(index + 1, 0, vertex);
break;
case ol.geom.GeometryType.LINE_STRING:
coordinates = geometry.getCoordinates();
coordinates.splice(index + 1, 0, vertex);
break;
default:
return;
}
this.setGeometryCoordinates_(geometry, coordinates);
var rTree = this.rBush_;
rTree.remove(segmentData);
this.updateSegmentIndices_(geometry, index, depth, 1);
var newSegmentData = /** @type {ol.ModifySegmentDataType} */ ({
segment: [segment[0], vertex],
feature: feature,
geometry: geometry,
depth: depth,
index: index
});
rTree.insert(ol.extent.boundingExtent(newSegmentData.segment),
newSegmentData);
this.dragSegments_.push([newSegmentData, 1]);
var newSegmentData2 = /** @type {ol.ModifySegmentDataType} */ ({
segment: [vertex, segment[1]],
feature: feature,
geometry: geometry,
depth: depth,
index: index + 1
});
rTree.insert(ol.extent.boundingExtent(newSegmentData2.segment),
newSegmentData2);
this.dragSegments_.push([newSegmentData2, 0]);
this.ignoreNextSingleClick_ = true;
};
/**
* Removes the vertex currently being pointed.
* @return {boolean} True when a vertex was removed.
* @api
*/
ol.interaction.Modify.prototype.removePoint = function() {
if (this.lastPointerEvent_ && this.lastPointerEvent_.type != ol.MapBrowserEvent.EventType.POINTERDRAG) {
var evt = this.lastPointerEvent_;
this.willModifyFeatures_(evt);
this.removeVertex_();
this.dispatchEvent(new ol.interaction.Modify.Event(
ol.interaction.Modify.EventType.MODIFYEND, this.features_, evt));
this.modified_ = false;
return true;
}
return false;
};
/**
* Removes a vertex from all matching features.
* @return {boolean} True when a vertex was removed.
* @private
*/
ol.interaction.Modify.prototype.removeVertex_ = function() {
var dragSegments = this.dragSegments_;
var segmentsByFeature = {};
var deleted = false;
var component, coordinates, dragSegment, geometry, i, index, left;
var newIndex, right, segmentData, uid;
for (i = dragSegments.length - 1; i >= 0; --i) {
dragSegment = dragSegments[i];
segmentData = dragSegment[0];
uid = ol.getUid(segmentData.feature);
if (segmentData.depth) {
// separate feature components
uid += '-' + segmentData.depth.join('-');
}
if (!(uid in segmentsByFeature)) {
segmentsByFeature[uid] = {};
}
if (dragSegment[1] === 0) {
segmentsByFeature[uid].right = segmentData;
segmentsByFeature[uid].index = segmentData.index;
} else if (dragSegment[1] == 1) {
segmentsByFeature[uid].left = segmentData;
segmentsByFeature[uid].index = segmentData.index + 1;
}
}
for (uid in segmentsByFeature) {
right = segmentsByFeature[uid].right;
left = segmentsByFeature[uid].left;
index = segmentsByFeature[uid].index;
newIndex = index - 1;
if (left !== undefined) {
segmentData = left;
} else {
segmentData = right;
}
if (newIndex < 0) {
newIndex = 0;
}
geometry = segmentData.geometry;
coordinates = geometry.getCoordinates();
component = coordinates;
deleted = false;
switch (geometry.getType()) {
case ol.geom.GeometryType.MULTI_LINE_STRING:
if (coordinates[segmentData.depth[0]].length > 2) {
coordinates[segmentData.depth[0]].splice(index, 1);
deleted = true;
}
break;
case ol.geom.GeometryType.LINE_STRING:
if (coordinates.length > 2) {
coordinates.splice(index, 1);
deleted = true;
}
break;
case ol.geom.GeometryType.MULTI_POLYGON:
component = component[segmentData.depth[1]];
/* falls through */
case ol.geom.GeometryType.POLYGON:
component = component[segmentData.depth[0]];
if (component.length > 4) {
if (index == component.length - 1) {
index = 0;
}
component.splice(index, 1);
deleted = true;
if (index === 0) {
// close the ring again
component.pop();
component.push(component[0]);
newIndex = component.length - 1;
}
}
break;
default:
// pass
}
if (deleted) {
this.setGeometryCoordinates_(geometry, coordinates);
var segments = [];
if (left !== undefined) {
this.rBush_.remove(left);
segments.push(left.segment[0]);
}
if (right !== undefined) {
this.rBush_.remove(right);
segments.push(right.segment[1]);
}
if (left !== undefined && right !== undefined) {
ol.DEBUG && console.assert(newIndex >= 0, 'newIndex should be larger than 0');
var newSegmentData = /** @type {ol.ModifySegmentDataType} */ ({
depth: segmentData.depth,
feature: segmentData.feature,
geometry: segmentData.geometry,
index: newIndex,
segment: segments
});
this.rBush_.insert(ol.extent.boundingExtent(newSegmentData.segment),
newSegmentData);
}
this.updateSegmentIndices_(geometry, index, segmentData.depth, -1);
if (this.vertexFeature_) {
this.overlay_.getSource().removeFeature(this.vertexFeature_);
this.vertexFeature_ = null;
}
}
}
return deleted;
};
/**
* @param {ol.geom.SimpleGeometry} geometry Geometry.
* @param {Array} coordinates Coordinates.
* @private
*/
ol.interaction.Modify.prototype.setGeometryCoordinates_ = function(geometry, coordinates) {
this.changingFeature_ = true;
geometry.setCoordinates(coordinates);
this.changingFeature_ = false;
};
/**
* @param {ol.geom.SimpleGeometry} geometry Geometry.
* @param {number} index Index.
* @param {Array.<number>|undefined} depth Depth.
* @param {number} delta Delta (1 or -1).
* @private
*/
ol.interaction.Modify.prototype.updateSegmentIndices_ = function(
geometry, index, depth, delta) {
this.rBush_.forEachInExtent(geometry.getExtent(), function(segmentDataMatch) {
if (segmentDataMatch.geometry === geometry &&
(depth === undefined || segmentDataMatch.depth === undefined ||
ol.array.equals(segmentDataMatch.depth, depth)) &&
segmentDataMatch.index > index) {
segmentDataMatch.index += delta;
}
});
};
/**
* @return {ol.StyleFunction} Styles.
*/
ol.interaction.Modify.getDefaultStyleFunction = function() {
var style = ol.style.Style.createDefaultEditing();
return function(feature, resolution) {
return style[ol.geom.GeometryType.POINT];
};
};
/**
* @classdesc
* Events emitted by {@link ol.interaction.Modify} instances are instances of
* this type.
*
* @constructor
* @extends {ol.events.Event}
* @implements {oli.ModifyEvent}
* @param {ol.interaction.Modify.EventType} type Type.
* @param {ol.Collection.<ol.Feature>} features The features modified.
* @param {ol.MapBrowserPointerEvent} mapBrowserPointerEvent Associated
* {@link ol.MapBrowserPointerEvent}.
*/
ol.interaction.Modify.Event = function(type, features, mapBrowserPointerEvent) {
ol.events.Event.call(this, type);
/**
* The features being modified.
* @type {ol.Collection.<ol.Feature>}
* @api
*/
this.features = features;
/**
* Associated {@link ol.MapBrowserEvent}.
* @type {ol.MapBrowserEvent}
* @api
*/
this.mapBrowserEvent = mapBrowserPointerEvent;
};
ol.inherits(ol.interaction.Modify.Event, ol.events.Event);
/**
* @enum {string}
*/
ol.interaction.Modify.EventType = {
/**
* Triggered upon feature modification start
* @event ol.interaction.Modify.Event#modifystart
* @api
*/
MODIFYSTART: 'modifystart',
/**
* Triggered upon feature modification end
* @event ol.interaction.Modify.Event#modifyend
* @api
*/
MODIFYEND: 'modifyend'
};