diff options
Diffstat (limited to 'debian/missing-sources/leaflet.js/dom/Draggable.js')
| -rw-r--r-- | debian/missing-sources/leaflet.js/dom/Draggable.js | 227 |
1 files changed, 227 insertions, 0 deletions
diff --git a/debian/missing-sources/leaflet.js/dom/Draggable.js b/debian/missing-sources/leaflet.js/dom/Draggable.js new file mode 100644 index 0000000..772860a --- /dev/null +++ b/debian/missing-sources/leaflet.js/dom/Draggable.js @@ -0,0 +1,227 @@ +import {Evented} from '../core/Events';
+import * as Browser from '../core/Browser';
+import * as DomEvent from './DomEvent';
+import * as DomUtil from './DomUtil';
+import * as Util from '../core/Util';
+import {Point} from '../geometry/Point';
+
+/*
+ * @class Draggable
+ * @aka L.Draggable
+ * @inherits Evented
+ *
+ * A class for making DOM elements draggable (including touch support).
+ * Used internally for map and marker dragging. Only works for elements
+ * that were positioned with [`L.DomUtil.setPosition`](#domutil-setposition).
+ *
+ * @example
+ * ```js
+ * var draggable = new L.Draggable(elementToDrag);
+ * draggable.enable();
+ * ```
+ */
+
+var START = Browser.touch ? 'touchstart mousedown' : 'mousedown';
+var END = {
+ mousedown: 'mouseup',
+ touchstart: 'touchend',
+ pointerdown: 'touchend',
+ MSPointerDown: 'touchend'
+};
+var MOVE = {
+ mousedown: 'mousemove',
+ touchstart: 'touchmove',
+ pointerdown: 'touchmove',
+ MSPointerDown: 'touchmove'
+};
+
+
+export var Draggable = Evented.extend({
+
+ options: {
+ // @section
+ // @aka Draggable options
+ // @option clickTolerance: Number = 3
+ // The max number of pixels a user can shift the mouse pointer during a click
+ // for it to be considered a valid click (as opposed to a mouse drag).
+ clickTolerance: 3
+ },
+
+ // @constructor L.Draggable(el: HTMLElement, dragHandle?: HTMLElement, preventOutline?: Boolean, options?: Draggable options)
+ // Creates a `Draggable` object for moving `el` when you start dragging the `dragHandle` element (equals `el` itself by default).
+ initialize: function (element, dragStartTarget, preventOutline, options) {
+ Util.setOptions(this, options);
+
+ this._element = element;
+ this._dragStartTarget = dragStartTarget || element;
+ this._preventOutline = preventOutline;
+ },
+
+ // @method enable()
+ // Enables the dragging ability
+ enable: function () {
+ if (this._enabled) { return; }
+
+ DomEvent.on(this._dragStartTarget, START, this._onDown, this);
+
+ this._enabled = true;
+ },
+
+ // @method disable()
+ // Disables the dragging ability
+ disable: function () {
+ if (!this._enabled) { return; }
+
+ // If we're currently dragging this draggable,
+ // disabling it counts as first ending the drag.
+ if (Draggable._dragging === this) {
+ this.finishDrag();
+ }
+
+ DomEvent.off(this._dragStartTarget, START, this._onDown, this);
+
+ this._enabled = false;
+ this._moved = false;
+ },
+
+ _onDown: function (e) {
+ // Ignore simulated events, since we handle both touch and
+ // mouse explicitly; otherwise we risk getting duplicates of
+ // touch events, see #4315.
+ // Also ignore the event if disabled; this happens in IE11
+ // under some circumstances, see #3666.
+ if (e._simulated || !this._enabled) { return; }
+
+ this._moved = false;
+
+ if (DomUtil.hasClass(this._element, 'leaflet-zoom-anim')) { return; }
+
+ if (Draggable._dragging || e.shiftKey || ((e.which !== 1) && (e.button !== 1) && !e.touches)) { return; }
+ Draggable._dragging = this; // Prevent dragging multiple objects at once.
+
+ if (this._preventOutline) {
+ DomUtil.preventOutline(this._element);
+ }
+
+ DomUtil.disableImageDrag();
+ DomUtil.disableTextSelection();
+
+ if (this._moving) { return; }
+
+ // @event down: Event
+ // Fired when a drag is about to start.
+ this.fire('down');
+
+ var first = e.touches ? e.touches[0] : e;
+
+ this._startPoint = new Point(first.clientX, first.clientY);
+
+ DomEvent.on(document, MOVE[e.type], this._onMove, this);
+ DomEvent.on(document, END[e.type], this._onUp, this);
+ },
+
+ _onMove: function (e) {
+ // Ignore simulated events, since we handle both touch and
+ // mouse explicitly; otherwise we risk getting duplicates of
+ // touch events, see #4315.
+ // Also ignore the event if disabled; this happens in IE11
+ // under some circumstances, see #3666.
+ if (e._simulated || !this._enabled) { return; }
+
+ if (e.touches && e.touches.length > 1) {
+ this._moved = true;
+ return;
+ }
+
+ var first = (e.touches && e.touches.length === 1 ? e.touches[0] : e),
+ newPoint = new Point(first.clientX, first.clientY),
+ offset = newPoint.subtract(this._startPoint);
+
+ if (!offset.x && !offset.y) { return; }
+ if (Math.abs(offset.x) + Math.abs(offset.y) < this.options.clickTolerance) { return; }
+
+ DomEvent.preventDefault(e);
+
+ if (!this._moved) {
+ // @event dragstart: Event
+ // Fired when a drag starts
+ this.fire('dragstart');
+
+ this._moved = true;
+ this._startPos = DomUtil.getPosition(this._element).subtract(offset);
+
+ DomUtil.addClass(document.body, 'leaflet-dragging');
+
+ this._lastTarget = e.target || e.srcElement;
+ // IE and Edge do not give the <use> element, so fetch it
+ // if necessary
+ if ((window.SVGElementInstance) && (this._lastTarget instanceof SVGElementInstance)) {
+ this._lastTarget = this._lastTarget.correspondingUseElement;
+ }
+ DomUtil.addClass(this._lastTarget, 'leaflet-drag-target');
+ }
+
+ this._newPos = this._startPos.add(offset);
+ this._moving = true;
+
+ Util.cancelAnimFrame(this._animRequest);
+ this._lastEvent = e;
+ this._animRequest = Util.requestAnimFrame(this._updatePosition, this, true);
+ },
+
+ _updatePosition: function () {
+ var e = {originalEvent: this._lastEvent};
+
+ // @event predrag: Event
+ // Fired continuously during dragging *before* each corresponding
+ // update of the element's position.
+ this.fire('predrag', e);
+ DomUtil.setPosition(this._element, this._newPos);
+
+ // @event drag: Event
+ // Fired continuously during dragging.
+ this.fire('drag', e);
+ },
+
+ _onUp: function (e) {
+ // Ignore simulated events, since we handle both touch and
+ // mouse explicitly; otherwise we risk getting duplicates of
+ // touch events, see #4315.
+ // Also ignore the event if disabled; this happens in IE11
+ // under some circumstances, see #3666.
+ if (e._simulated || !this._enabled) { return; }
+ this.finishDrag();
+ },
+
+ finishDrag: function () {
+ DomUtil.removeClass(document.body, 'leaflet-dragging');
+
+ if (this._lastTarget) {
+ DomUtil.removeClass(this._lastTarget, 'leaflet-drag-target');
+ this._lastTarget = null;
+ }
+
+ for (var i in MOVE) {
+ DomEvent.off(document, MOVE[i], this._onMove, this);
+ DomEvent.off(document, END[i], this._onUp, this);
+ }
+
+ DomUtil.enableImageDrag();
+ DomUtil.enableTextSelection();
+
+ if (this._moved && this._moving) {
+ // ensure drag is not fired after dragend
+ Util.cancelAnimFrame(this._animRequest);
+
+ // @event dragend: DragEndEvent
+ // Fired when the drag ends.
+ this.fire('dragend', {
+ distance: this._newPos.distanceTo(this._startPos)
+ });
+ }
+
+ this._moving = false;
+ Draggable._dragging = false;
+ }
+
+});
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