1 files changed, 236 insertions, 0 deletions
diff --git a/debian/missing-sources/leaflet.js/map/handler/Map.Drag.js b/debian/missing-sources/leaflet.js/map/handler/Map.Drag.js
new file mode 100644
index 0000000..69597bd
--- /dev/null
+++ b/debian/missing-sources/leaflet.js/map/handler/Map.Drag.js
@@ -0,0 +1,236 @@
+import {Map} from '../Map';
+import * as Browser from '../../core/Browser';
+import {Handler} from '../../core/Handler';
+import {Draggable} from '../../dom/Draggable';
+import * as Util from '../../core/Util';
+import * as DomUtil from '../../dom/DomUtil';
+import {toLatLngBounds as latLngBounds} from '../../geo/LatLngBounds';
+import {toBounds} from '../../geometry/Bounds';
+
+/*
+ * L.Handler.MapDrag is used to make the map draggable (with panning inertia), enabled by default.
+ */
+
+// @namespace Map
+// @section Interaction Options
+Map.mergeOptions({
+	// @option dragging: Boolean = true
+	// Whether the map be draggable with mouse/touch or not.
+	dragging: true,
+
+	// @section Panning Inertia Options
+	// @option inertia: Boolean = *
+	// If enabled, panning of the map will have an inertia effect where
+	// the map builds momentum while dragging and continues moving in
+	// the same direction for some time. Feels especially nice on touch
+	// devices. Enabled by default unless running on old Android devices.
+	inertia: !Browser.android23,
+
+	// @option inertiaDeceleration: Number = 3000
+	// The rate with which the inertial movement slows down, in pixels/second².
+	inertiaDeceleration: 3400, // px/s^2
+
+	// @option inertiaMaxSpeed: Number = Infinity
+	// Max speed of the inertial movement, in pixels/second.
+	inertiaMaxSpeed: Infinity, // px/s
+
+	// @option easeLinearity: Number = 0.2
+	easeLinearity: 0.2,
+
+	// TODO refactor, move to CRS
+	// @option worldCopyJump: Boolean = false
+	// With this option enabled, the map tracks when you pan to another "copy"
+	// of the world and seamlessly jumps to the original one so that all overlays
+	// like markers and vector layers are still visible.
+	worldCopyJump: false,
+
+	// @option maxBoundsViscosity: Number = 0.0
+	// If `maxBounds` is set, this option will control how solid the bounds
+	// are when dragging the map around. The default value of `0.0` allows the
+	// user to drag outside the bounds at normal speed, higher values will
+	// slow down map dragging outside bounds, and `1.0` makes the bounds fully
+	// solid, preventing the user from dragging outside the bounds.
+	maxBoundsViscosity: 0.0
+});
+
+export var Drag = Handler.extend({
+	addHooks: function () {
+		if (!this._draggable) {
+			var map = this._map;
+
+			this._draggable = new Draggable(map._mapPane, map._container);
+
+			this._draggable.on({
+				dragstart: this._onDragStart,
+				drag: this._onDrag,
+				dragend: this._onDragEnd
+			}, this);
+
+			this._draggable.on('predrag', this._onPreDragLimit, this);
+			if (map.options.worldCopyJump) {
+				this._draggable.on('predrag', this._onPreDragWrap, this);
+				map.on('zoomend', this._onZoomEnd, this);
+
+				map.whenReady(this._onZoomEnd, this);
+			}
+		}
+		DomUtil.addClass(this._map._container, 'leaflet-grab leaflet-touch-drag');
+		this._draggable.enable();
+		this._positions = [];
+		this._times = [];
+	},
+
+	removeHooks: function () {
+		DomUtil.removeClass(this._map._container, 'leaflet-grab');
+		DomUtil.removeClass(this._map._container, 'leaflet-touch-drag');
+		this._draggable.disable();
+	},
+
+	moved: function () {
+		return this._draggable && this._draggable._moved;
+	},
+
+	moving: function () {
+		return this._draggable && this._draggable._moving;
+	},
+
+	_onDragStart: function () {
+		var map = this._map;
+
+		map._stop();
+		if (this._map.options.maxBounds && this._map.options.maxBoundsViscosity) {
+			var bounds = latLngBounds(this._map.options.maxBounds);
+
+			this._offsetLimit = toBounds(
+				this._map.latLngToContainerPoint(bounds.getNorthWest()).multiplyBy(-1),
+				this._map.latLngToContainerPoint(bounds.getSouthEast()).multiplyBy(-1)
+					.add(this._map.getSize()));
+
+			this._viscosity = Math.min(1.0, Math.max(0.0, this._map.options.maxBoundsViscosity));
+		} else {
+			this._offsetLimit = null;
+		}
+
+		map
+		    .fire('movestart')
+		    .fire('dragstart');
+
+		if (map.options.inertia) {
+			this._positions = [];
+			this._times = [];
+		}
+	},
+
+	_onDrag: function (e) {
+		if (this._map.options.inertia) {
+			var time = this._lastTime = +new Date(),
+			    pos = this._lastPos = this._draggable._absPos || this._draggable._newPos;
+
+			this._positions.push(pos);
+			this._times.push(time);
+
+			this._prunePositions(time);
+		}
+
+		this._map
+		    .fire('move', e)
+		    .fire('drag', e);
+	},
+
+	_prunePositions: function (time) {
+		while (this._positions.length > 1 && time - this._times[0] > 50) {
+			this._positions.shift();
+			this._times.shift();
+		}
+	},
+
+	_onZoomEnd: function () {
+		var pxCenter = this._map.getSize().divideBy(2),
+		    pxWorldCenter = this._map.latLngToLayerPoint([0, 0]);
+
+		this._initialWorldOffset = pxWorldCenter.subtract(pxCenter).x;
+		this._worldWidth = this._map.getPixelWorldBounds().getSize().x;
+	},
+
+	_viscousLimit: function (value, threshold) {
+		return value - (value - threshold) * this._viscosity;
+	},
+
+	_onPreDragLimit: function () {
+		if (!this._viscosity || !this._offsetLimit) { return; }
+
+		var offset = this._draggable._newPos.subtract(this._draggable._startPos);
+
+		var limit = this._offsetLimit;
+		if (offset.x < limit.min.x) { offset.x = this._viscousLimit(offset.x, limit.min.x); }
+		if (offset.y < limit.min.y) { offset.y = this._viscousLimit(offset.y, limit.min.y); }
+		if (offset.x > limit.max.x) { offset.x = this._viscousLimit(offset.x, limit.max.x); }
+		if (offset.y > limit.max.y) { offset.y = this._viscousLimit(offset.y, limit.max.y); }
+
+		this._draggable._newPos = this._draggable._startPos.add(offset);
+	},
+
+	_onPreDragWrap: function () {
+		// TODO refactor to be able to adjust map pane position after zoom
+		var worldWidth = this._worldWidth,
+		    halfWidth = Math.round(worldWidth / 2),
+		    dx = this._initialWorldOffset,
+		    x = this._draggable._newPos.x,
+		    newX1 = (x - halfWidth + dx) % worldWidth + halfWidth - dx,
+		    newX2 = (x + halfWidth + dx) % worldWidth - halfWidth - dx,
+		    newX = Math.abs(newX1 + dx) < Math.abs(newX2 + dx) ? newX1 : newX2;
+
+		this._draggable._absPos = this._draggable._newPos.clone();
+		this._draggable._newPos.x = newX;
+	},
+
+	_onDragEnd: function (e) {
+		var map = this._map,
+		    options = map.options,
+
+		    noInertia = !options.inertia || this._times.length < 2;
+
+		map.fire('dragend', e);
+
+		if (noInertia) {
+			map.fire('moveend');
+
+		} else {
+			this._prunePositions(+new Date());
+
+			var direction = this._lastPos.subtract(this._positions[0]),
+			    duration = (this._lastTime - this._times[0]) / 1000,
+			    ease = options.easeLinearity,
+
+			    speedVector = direction.multiplyBy(ease / duration),
+			    speed = speedVector.distanceTo([0, 0]),
+
+			    limitedSpeed = Math.min(options.inertiaMaxSpeed, speed),
+			    limitedSpeedVector = speedVector.multiplyBy(limitedSpeed / speed),
+
+			    decelerationDuration = limitedSpeed / (options.inertiaDeceleration * ease),
+			    offset = limitedSpeedVector.multiplyBy(-decelerationDuration / 2).round();
+
+			if (!offset.x && !offset.y) {
+				map.fire('moveend');
+
+			} else {
+				offset = map._limitOffset(offset, map.options.maxBounds);
+
+				Util.requestAnimFrame(function () {
+					map.panBy(offset, {
+						duration: decelerationDuration,
+						easeLinearity: ease,
+						noMoveStart: true,
+						animate: true
+					});
+				});
+			}
+		}
+	}
+});
+
+// @section Handlers
+// @property dragging: Handler
+// Map dragging handler (by both mouse and touch).
+Map.addInitHook('addHandler', 'dragging', Drag);