Files
openlayers/src/ol/interaction/modifyinteraction.js
2014-03-13 01:02:15 +01:00

643 lines
19 KiB
JavaScript

goog.provide('ol.interaction.Modify');
goog.require('goog.array');
goog.require('goog.asserts');
goog.require('goog.events');
goog.require('ol.Collection');
goog.require('ol.CollectionEventType');
goog.require('ol.Feature');
goog.require('ol.FeatureOverlay');
goog.require('ol.MapBrowserEvent.EventType');
goog.require('ol.ViewHint');
goog.require('ol.coordinate');
goog.require('ol.extent');
goog.require('ol.geom.GeometryType');
goog.require('ol.geom.LineString');
goog.require('ol.geom.MultiLineString');
goog.require('ol.geom.MultiPoint');
goog.require('ol.geom.MultiPolygon');
goog.require('ol.geom.Point');
goog.require('ol.geom.Polygon');
goog.require('ol.interaction.Drag');
goog.require('ol.structs.RBush');
/**
* @typedef {{depth: (Array.<number>|undefined),
* feature: ol.Feature,
* geometry: ol.geom.SimpleGeometry,
* index: (number|undefined),
* segment: Array.<ol.Extent>}}
*/
ol.interaction.SegmentDataType;
/**
* @constructor
* @extends {ol.interaction.Drag}
* @param {olx.interaction.ModifyOptions} options Options.
*/
ol.interaction.Modify = function(options) {
goog.base(this);
/**
* 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 {boolean}
* @private
*/
this.modifiable_ = false;
/**
* @type {ol.Pixel}
* @private
*/
this.lastPixel_ = null;
/**
* Segment RTree for each layer
* @type {Object.<*, ol.structs.RBush>}
* @private
*/
this.rBush_ = null;
/**
* @type {number}
* @private
*/
this.pixelTolerance_ = goog.isDef(options.pixelTolerance) ?
options.pixelTolerance : 20;
/**
* @type {Array}
* @private
*/
this.dragSegments_ = null;
/**
* Draw overlay where are sketch features are drawn.
* @type {ol.FeatureOverlay}
* @private
*/
this.overlay_ = new ol.FeatureOverlay({
style: options.style
});
/**
* @type {ol.Collection}
* @private
*/
this.features_ = options.features;
goog.events.listen(this.features_, ol.CollectionEventType.ADD,
this.addFeature_, false, this);
goog.events.listen(this.features_, ol.CollectionEventType.REMOVE,
this.removeFeature_, false, this);
/**
* @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_
};
};
goog.inherits(ol.interaction.Modify, ol.interaction.Drag);
/**
* @inheritDoc
*/
ol.interaction.Modify.prototype.setMap = function(map) {
if (!goog.isNull(map)) {
if (goog.isNull(this.rBush_)) {
this.rBush_ = new ol.structs.RBush();
}
} else {
// removing from a map, clean up
this.rBush_ = null;
}
this.overlay_.setMap(map);
goog.base(this, 'setMap', map);
};
/**
* @param {ol.CollectionEvent} evt Event.
* @private
*/
ol.interaction.Modify.prototype.addFeature_ = function(evt) {
var feature = evt.element;
goog.asserts.assertInstanceof(feature, ol.Feature);
var geometry = feature.getGeometry();
if (goog.isDef(this.SEGMENT_WRITERS_[geometry.getType()])) {
this.SEGMENT_WRITERS_[geometry.getType()].call(this, feature, geometry);
}
this.handleMouseAtPixel_(this.lastPixel_, this.getMap());
};
/**
* @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.interaction.SegmentDataType} */ ({
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.interaction.SegmentDataType} */ ({
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.interaction.SegmentDataType} */ ({
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.interaction.SegmentDataType} */ ({
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.interaction.SegmentDataType} */ ({
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.interaction.SegmentDataType} */ ({
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.CollectionEvent} evt Event.
* @private
*/
ol.interaction.Modify.prototype.removeFeature_ = function(evt) {
var feature = evt.element;
var rBush = this.rBush_;
var i, nodesToRemove = [];
rBush.forEachInExtent(feature.getGeometry().getExtent(), function(node) {
if (feature === node.feature) {
nodesToRemove.push(node);
}
});
for (i = nodesToRemove.length - 1; i >= 0; --i) {
rBush.remove(nodesToRemove[i]);
}
// There remains only vertexFeature…
if (!goog.isNull(this.vertexFeature_) &&
this.features_.getLength() === 0) {
this.overlay_.removeFeature(this.vertexFeature_);
this.vertexFeature_ = null;
}
};
/**
* @param {ol.Coordinate} coordinates Coordinates.
* @return {ol.Feature} Vertex feature.
* @private
*/
ol.interaction.Modify.prototype.createOrUpdateVertexFeature_ =
function(coordinates) {
var vertexFeature = this.vertexFeature_;
if (goog.isNull(vertexFeature)) {
vertexFeature = new ol.Feature(new ol.geom.Point(coordinates));
this.vertexFeature_ = vertexFeature;
this.overlay_.addFeature(vertexFeature);
} else {
var geometry = /** @type {ol.geom.Point} */ (vertexFeature.getGeometry());
geometry.setCoordinates(coordinates);
}
return vertexFeature;
};
/**
* @inheritDoc
*/
ol.interaction.Modify.prototype.handleDragStart = function(evt) {
this.dragSegments_ = [];
var vertexFeature = this.vertexFeature_;
if (!goog.isNull(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_.forEachInExtent(vertexExtent,
function(segmentData) {
segmentDataMatches.push(segmentData);
});
var distinctFeatures = {};
for (var i = 0, ii = segmentDataMatches.length; i < ii; ++i) {
var segmentDataMatch = segmentDataMatches[i];
var segment = segmentDataMatch.segment;
if (!(goog.getUid(segmentDataMatch.feature) in distinctFeatures)) {
var feature = segmentDataMatch.feature;
distinctFeatures[goog.getUid(feature)] = true;
}
if (ol.coordinate.equals(segment[0], vertex)) {
this.dragSegments_.push([segmentDataMatch, 0]);
} else if (ol.coordinate.equals(segment[1], vertex)) {
this.dragSegments_.push([segmentDataMatch, 1]);
} else if (goog.getUid(segment) in this.vertexSegments_) {
insertVertices.push([segmentDataMatch, vertex]);
}
}
for (i = insertVertices.length - 1; i >= 0; --i) {
this.insertVertex_.apply(this, insertVertices[i]);
}
}
return this.modifiable_;
};
/**
* @inheritDoc
*/
ol.interaction.Modify.prototype.handleDrag = function(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];
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;
}
geometry.setCoordinates(coordinates);
var newBounds = ol.extent.boundingExtent(segment);
this.createOrUpdateVertexFeature_(vertex);
this.rBush_.remove(segmentData);
this.rBush_.insert(newBounds, segmentData);
}
};
/**
* @inheritDoc
*/
ol.interaction.Modify.prototype.handleDragEnd = 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);
}
};
/**
* @inheritDoc
*/
ol.interaction.Modify.prototype.handleMapBrowserEvent =
function(mapBrowserEvent) {
if (!mapBrowserEvent.map.getView().getHints()[ol.ViewHint.INTERACTING] &&
!this.getDragging() &&
mapBrowserEvent.type == ol.MapBrowserEvent.EventType.MOUSEMOVE) {
this.handleMouseMove_(mapBrowserEvent);
}
goog.base(this, 'handleMapBrowserEvent', mapBrowserEvent);
return !this.modifiable_;
};
/**
* @param {ol.MapBrowserEvent} evt Event.
* @private
*/
ol.interaction.Modify.prototype.handleMouseMove_ = function(evt) {
this.lastPixel_ = evt.pixel;
this.handleMouseAtPixel_(evt.pixel, evt.map);
};
/**
* @param {ol.Pixel} pixel Pixel
* @param {ol.Map} map Map.
* @private
*/
ol.interaction.Modify.prototype.handleMouseAtPixel_ = 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 lowerLeft = map.getCoordinateFromPixel(
[pixel[0] - this.pixelTolerance_, pixel[1] + this.pixelTolerance_]);
var upperRight = map.getCoordinateFromPixel(
[pixel[0] + this.pixelTolerance_, pixel[1] - this.pixelTolerance_]);
var box = ol.extent.boundingExtent([lowerLeft, upperRight]);
this.modifiable_ = false;
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));
if (dist <= 10) {
vertex = squaredDist1 > squaredDist2 ?
closestSegment[1] : closestSegment[0];
}
this.createOrUpdateVertexFeature_(vertex);
var vertexSegments = {};
vertexSegments[goog.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[goog.getUid(segment)] = true;
} else {
break;
}
}
this.vertexSegments_ = vertexSegments;
this.modifiable_ = true;
return;
}
}
if (!goog.isNull(this.vertexFeature_)) {
this.overlay_.removeFeature(this.vertexFeature_);
this.vertexFeature_ = null;
}
};
/**
* @param {ol.interaction.SegmentDataType} 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 = segmentData.index;
var coordinates;
switch (geometry.getType()) {
case ol.geom.GeometryType.MULTI_LINE_STRING:
goog.asserts.assertInstanceof(geometry, ol.geom.MultiLineString);
coordinates = geometry.getCoordinates();
coordinates[depth[0]].splice(index + 1, 0, vertex);
break;
case ol.geom.GeometryType.POLYGON:
goog.asserts.assertInstanceof(geometry, ol.geom.Polygon);
coordinates = geometry.getCoordinates();
coordinates[depth[0]].splice(index + 1, 0, vertex);
break;
case ol.geom.GeometryType.MULTI_POLYGON:
goog.asserts.assertInstanceof(geometry, ol.geom.MultiPolygon);
coordinates = geometry.getCoordinates();
coordinates[depth[1]][depth[0]].splice(index + 1, 0, vertex);
break;
case ol.geom.GeometryType.LINE_STRING:
goog.asserts.assertInstanceof(geometry, ol.geom.LineString);
coordinates = geometry.getCoordinates();
coordinates.splice(index + 1, 0, vertex);
break;
default:
return;
}
geometry.setCoordinates(coordinates);
var rTree = this.rBush_;
goog.asserts.assert(goog.isDef(segment));
rTree.remove(segmentData);
var uid = goog.getUid(feature);
var segmentDataMatches = [];
this.rBush_.forEachInExtent(geometry.getExtent(),
function(segmentData) {
if (goog.getUid(segmentData.feature) === uid) {
segmentDataMatches.push(segmentData);
}
});
for (var i = 0, ii = segmentDataMatches.length; i < ii; ++i) {
var segmentDataMatch = segmentDataMatches[i];
if (segmentDataMatch.geometry === geometry &&
(!goog.isDef(depth) ||
goog.array.equals(segmentDataMatch.depth, depth)) &&
segmentDataMatch.index > index) {
++segmentDataMatch.index;
}
}
var newSegmentData = /** @type {ol.interaction.SegmentDataType} */ ({
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.interaction.SegmentDataType} */ ({
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]);
};