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authorMarkus Koch <markus@notsyncing.net>2020-04-19 21:58:35 +0200
committerMarkus Koch <markus@notsyncing.net>2020-04-19 21:58:35 +0200
commitbe65b093a1b11713b25e19bdd58d6ff3d9184032 (patch)
tree0df29ed259ff4aa9ff9b2805a4e95a48268c9448
parent6a86056a8776cc35de290562cb55939e05ed3020 (diff)
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Include Leaflet.streetlabels.js in repository
-rw-r--r--htdocs/index.html2
-rw-r--r--htdocs/leafletjs/Leaflet.streetlabels.js196
2 files changed, 197 insertions, 1 deletions
diff --git a/htdocs/index.html b/htdocs/index.html
index 27b0f9a..d9cff65 100644
--- a/htdocs/index.html
+++ b/htdocs/index.html
@@ -12,7 +12,7 @@
<!-- Streets -->
<script src='https://rawcdn.githack.com/Viglino/Canvas-TextPath/9a757d745071e0eaf2440a1d02117dad38f5b6dd/ctxtextpath.js'></script>
<script src='https://rawcdn.githack.com/yakitoritabetai/Leaflet.LabelTextCollision/90fe755cc7ec5d97b71e2e953464fa5369d6e655/dist/L.LabelTextCollision.js'></script>
- <script src='https://raw.githack.com/triedeti/Leaflet.streetlabels/master/src/Leaflet.streetlabels.js'></script>
+ <script src='leafletjs/Leaflet.streetlabels.js'></script>
<!-- Map Editor -->
<script src='leafletjs/Leaflet.Editable.js'></script>
</head>
diff --git a/htdocs/leafletjs/Leaflet.streetlabels.js b/htdocs/leafletjs/Leaflet.streetlabels.js
new file mode 100644
index 0000000..8685ac9
--- /dev/null
+++ b/htdocs/leafletjs/Leaflet.streetlabels.js
@@ -0,0 +1,196 @@
+/*
+ *
+ *
+*/
+L.StreetLabels = L.LabelTextCollision
+ .extend({
+
+ options: {
+ /**
+ * Default property name to display the tooltip
+ */
+ propertyName: 'name',
+ showLabelIf: null,
+ fontStyle: {
+ dynamicFontSize: false,
+ fontSize: 10,
+ fontSizeUnit: "px",
+ lineWidth: 4.0,
+ fillStyle: "black",
+ strokeStyle: "white",
+ },
+ },
+
+ initialize: function (options) {
+ L.LabelTextCollision.prototype.initialize.call(this, options);
+ L.Util.stamp(this);
+ this._layers = this._layers || {};
+ },
+
+ _initContainer: function (options) {
+ L.LabelTextCollision.prototype._initContainer.call(this, options);
+
+ //Register the add/remove layers event to update the annotations accordingly
+ if (this._map) {
+ var handleLayerChanges = function () {
+ this._reset();
+ this._redraw();
+ }.bind(this);
+ this._map.on("layerremove", L.Util.throttle(handleLayerChanges, 32, this));
+ }
+ },
+
+ _text: function (ctx, layer) {
+
+ if (layer && layer.feature && layer.feature.properties && layer.feature.properties[this.options.propertyName] !== 'undefined') {
+
+ if (this.options.showLabelIf) {
+ if (this.options.showLabelIf.call(this, layer.feature) === false) {
+ return;
+ }
+ }
+
+ var layerText = layer.feature.properties[this.options.propertyName];
+ ctx.globalAlpha = 1;
+ var p;
+
+ // polygon or polyline
+ if (layer._parts.length === 0 || layer._parts[0].length === 0) {
+ return;
+ }
+
+ if (layer instanceof L.Polygon && this._map.hasLayer(layer)) {
+ p = this._getCentroid(layer);
+ }
+ else {
+ p = this._getCenter(layer._parts[0]);
+ }
+
+ if (!p) {
+ return;
+ }
+
+ // label bounds offset
+ var offsetX = 0;
+ var offsetY = 0;
+
+ /**
+ * TODO setting for custom font
+ */
+ ctx.lineWidth = this.options.fontStyle.lineWidth;
+
+ var fontSize = this.options.fontStyle.fontSize;
+
+ if (this._map && this.options.fontStyle.dynamicFontSize === true) {
+ fontSize = this._getDynamicFontSize();
+
+ }
+
+ ctx.font = fontSize + this.options.fontStyle.fontSizeUnit + " 'Helvetica Neue',Helvetica,Arial,sans-serif";
+
+ // Collision detection
+ var textWidth = (ctx.measureText(layerText).width) + p.x;// + offsetX;
+
+ var textHeight = p.y + offsetY + 20;
+
+ var bounds = L.bounds(
+ L.point(p.x + offsetX, p.y + offsetY), L.point(
+ textWidth, textHeight));
+
+ if (this.options.collisionFlg) {
+
+ for (var index in this._textList) {
+ var pointBounds = this._textList[index];
+ if (pointBounds.intersects(bounds)) {
+ return;
+ }
+ }
+ }
+
+ this._textList.push(bounds);
+
+
+ ctx.fillStyle = this.options.fontStyle.fillStyle;
+ ctx.strokeStyle = this.options.fontStyle.strokeStyle;
+
+ if (layer instanceof L.Polygon || layer instanceof L.CircleMarker) {
+ var textLength = ctx.measureText(layerText).width;
+ ctx.strokeText(layerText, p.x + offsetX - textLength / 2, p.y + offsetY);
+ ctx.fillText(layerText, p.x + offsetX - textLength / 2, p.y + offsetY);
+ }
+ if (layer instanceof L.Polyline) {
+ /**
+ * Render text alongside the polyline
+ * **/
+ var startCoords = layer.getLatLngs()[0];
+ var stopCoords = layer.getLatLngs()[layer.getLatLngs().length - 1];
+
+ //Flip lineString if bearing is negative
+ if (this._getBearing(startCoords, stopCoords) < 0)
+ layer = this._getLineStringReverse(layer);
+
+ if (layer._parts) {
+ ctx.textAlign = "center";
+ ctx.textBaseline = "middle";
+ ctx.lineWidth = 3;
+ layer._parts.forEach(function (part) {
+ //Build the points list for the first part
+ var pathPoints = [];
+ for (var i = 0; i < part.length; i++) {
+ var linePart = part[i];
+ pathPoints.push(linePart.x);
+ pathPoints.push(linePart.y);
+ }
+
+ ctx.textPath(layerText, pathPoints);
+ });
+ }
+ }
+ }
+ },
+
+ /***
+ * Returns the bearing in degrees clockwise from north (0 degrees)
+ from the first L.LatLng to the second, at the first LatLng
+ @param {L.LatLng} latlng1: origin point of the bearing
+ @param {L.LatLng} latlng2: destination point of the bearing
+ @returns {float} degrees clockwise from north.
+ Source: https://makinacorpus.github.io/Leaflet.GeometryUtil/leaflet.geometryutil.js.html
+ */
+ _getBearing: function (startCoords, stopCoords) {
+ var rad = Math.PI / 180,
+ lat1 = startCoords.lat * rad,
+ lat2 = stopCoords.lat * rad,
+ lon1 = startCoords.lng * rad,
+ lon2 = stopCoords.lng * rad,
+ y = Math.sin(lon2 - lon1) * Math.cos(lat2),
+ x = Math.cos(lat1) * Math.sin(lat2) -
+ Math.sin(lat1) * Math.cos(lat2) * Math.cos(lon2 - lon1);
+ var bearing = ((Math.atan2(y, x) * 180 / Math.PI) + 360) % 360;
+ return bearing >= 180 ? bearing - 360 : bearing;
+ },
+
+ /**
+ Returns a clone with reversed coordinates.
+ @param {L.PolyLine} polyline polyline to reverse
+ @returns {L.PolyLine} polyline reversed
+ Source: https://makinacorpus.github.io/Leaflet.GeometryUtil/leaflet.geometryutil.js.html
+ */
+ _getLineStringReverse: function (polyline) {
+ var latLngs = polyline.getLatLngs().slice(0).reverse();
+ polyline.setLatLngs(latLngs);
+ return polyline;
+ },
+
+ _getDynamicFontSize: function () {
+ return parseInt(this._map.getZoom());
+ },
+
+ _getCentroid: function (layer) {
+ if (layer && layer.getCenter && this._map) {
+ var latlngCenter = layer.getCenter();
+ var containerPoint = this._map.latLngToContainerPoint(latlngCenter);
+ return this._map.containerPointToLayerPoint(containerPoint);
+ }
+ },
+ });