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Diffstat (limited to '')
| -rw-r--r-- | debian/missing-sources/leaflet.js/dom/DomEvent.js | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/debian/missing-sources/leaflet.js/dom/DomEvent.js b/debian/missing-sources/leaflet.js/dom/DomEvent.js new file mode 100644 index 0000000..a544954 --- /dev/null +++ b/debian/missing-sources/leaflet.js/dom/DomEvent.js @@ -0,0 +1,313 @@ +import {Point} from '../geometry/Point';
+import * as Util from '../core/Util';
+import * as Browser from '../core/Browser';
+import {addPointerListener, removePointerListener} from './DomEvent.Pointer';
+import {addDoubleTapListener, removeDoubleTapListener} from './DomEvent.DoubleTap';
+
+/*
+ * @namespace DomEvent
+ * Utility functions to work with the [DOM events](https://developer.mozilla.org/docs/Web/API/Event), used by Leaflet internally.
+ */
+
+// Inspired by John Resig, Dean Edwards and YUI addEvent implementations.
+
+// @function on(el: HTMLElement, types: String, fn: Function, context?: Object): this
+// Adds a listener function (`fn`) to a particular DOM event type of the
+// element `el`. You can optionally specify the context of the listener
+// (object the `this` keyword will point to). You can also pass several
+// space-separated types (e.g. `'click dblclick'`).
+
+// @alternative
+// @function on(el: HTMLElement, eventMap: Object, context?: Object): this
+// Adds a set of type/listener pairs, e.g. `{click: onClick, mousemove: onMouseMove}`
+export function on(obj, types, fn, context) {
+
+ if (typeof types === 'object') {
+ for (var type in types) {
+ addOne(obj, type, types[type], fn);
+ }
+ } else {
+ types = Util.splitWords(types);
+
+ for (var i = 0, len = types.length; i < len; i++) {
+ addOne(obj, types[i], fn, context);
+ }
+ }
+
+ return this;
+}
+
+var eventsKey = '_leaflet_events';
+
+// @function off(el: HTMLElement, types: String, fn: Function, context?: Object): this
+// Removes a previously added listener function.
+// Note that if you passed a custom context to on, you must pass the same
+// context to `off` in order to remove the listener.
+
+// @alternative
+// @function off(el: HTMLElement, eventMap: Object, context?: Object): this
+// Removes a set of type/listener pairs, e.g. `{click: onClick, mousemove: onMouseMove}`
+export function off(obj, types, fn, context) {
+
+ if (typeof types === 'object') {
+ for (var type in types) {
+ removeOne(obj, type, types[type], fn);
+ }
+ } else if (types) {
+ types = Util.splitWords(types);
+
+ for (var i = 0, len = types.length; i < len; i++) {
+ removeOne(obj, types[i], fn, context);
+ }
+ } else {
+ for (var j in obj[eventsKey]) {
+ removeOne(obj, j, obj[eventsKey][j]);
+ }
+ delete obj[eventsKey];
+ }
+
+ return this;
+}
+
+function addOne(obj, type, fn, context) {
+ var id = type + Util.stamp(fn) + (context ? '_' + Util.stamp(context) : '');
+
+ if (obj[eventsKey] && obj[eventsKey][id]) { return this; }
+
+ var handler = function (e) {
+ return fn.call(context || obj, e || window.event);
+ };
+
+ var originalHandler = handler;
+
+ if (Browser.pointer && type.indexOf('touch') === 0) {
+ // Needs DomEvent.Pointer.js
+ addPointerListener(obj, type, handler, id);
+
+ } else if (Browser.touch && (type === 'dblclick') && addDoubleTapListener &&
+ !(Browser.pointer && Browser.chrome)) {
+ // Chrome >55 does not need the synthetic dblclicks from addDoubleTapListener
+ // See #5180
+ addDoubleTapListener(obj, handler, id);
+
+ } else if ('addEventListener' in obj) {
+
+ if (type === 'mousewheel') {
+ obj.addEventListener('onwheel' in obj ? 'wheel' : 'mousewheel', handler, false);
+
+ } else if ((type === 'mouseenter') || (type === 'mouseleave')) {
+ handler = function (e) {
+ e = e || window.event;
+ if (isExternalTarget(obj, e)) {
+ originalHandler(e);
+ }
+ };
+ obj.addEventListener(type === 'mouseenter' ? 'mouseover' : 'mouseout', handler, false);
+
+ } else {
+ if (type === 'click' && Browser.android) {
+ handler = function (e) {
+ filterClick(e, originalHandler);
+ };
+ }
+ obj.addEventListener(type, handler, false);
+ }
+
+ } else if ('attachEvent' in obj) {
+ obj.attachEvent('on' + type, handler);
+ }
+
+ obj[eventsKey] = obj[eventsKey] || {};
+ obj[eventsKey][id] = handler;
+}
+
+function removeOne(obj, type, fn, context) {
+
+ var id = type + Util.stamp(fn) + (context ? '_' + Util.stamp(context) : ''),
+ handler = obj[eventsKey] && obj[eventsKey][id];
+
+ if (!handler) { return this; }
+
+ if (Browser.pointer && type.indexOf('touch') === 0) {
+ removePointerListener(obj, type, id);
+
+ } else if (Browser.touch && (type === 'dblclick') && removeDoubleTapListener &&
+ !(Browser.pointer && Browser.chrome)) {
+ removeDoubleTapListener(obj, id);
+
+ } else if ('removeEventListener' in obj) {
+
+ if (type === 'mousewheel') {
+ obj.removeEventListener('onwheel' in obj ? 'wheel' : 'mousewheel', handler, false);
+
+ } else {
+ obj.removeEventListener(
+ type === 'mouseenter' ? 'mouseover' :
+ type === 'mouseleave' ? 'mouseout' : type, handler, false);
+ }
+
+ } else if ('detachEvent' in obj) {
+ obj.detachEvent('on' + type, handler);
+ }
+
+ obj[eventsKey][id] = null;
+}
+
+// @function stopPropagation(ev: DOMEvent): this
+// Stop the given event from propagation to parent elements. Used inside the listener functions:
+// ```js
+// L.DomEvent.on(div, 'click', function (ev) {
+// L.DomEvent.stopPropagation(ev);
+// });
+// ```
+export function stopPropagation(e) {
+
+ if (e.stopPropagation) {
+ e.stopPropagation();
+ } else if (e.originalEvent) { // In case of Leaflet event.
+ e.originalEvent._stopped = true;
+ } else {
+ e.cancelBubble = true;
+ }
+ skipped(e);
+
+ return this;
+}
+
+// @function disableScrollPropagation(el: HTMLElement): this
+// Adds `stopPropagation` to the element's `'mousewheel'` events (plus browser variants).
+export function disableScrollPropagation(el) {
+ addOne(el, 'mousewheel', stopPropagation);
+ return this;
+}
+
+// @function disableClickPropagation(el: HTMLElement): this
+// Adds `stopPropagation` to the element's `'click'`, `'doubleclick'`,
+// `'mousedown'` and `'touchstart'` events (plus browser variants).
+export function disableClickPropagation(el) {
+ on(el, 'mousedown touchstart dblclick', stopPropagation);
+ addOne(el, 'click', fakeStop);
+ return this;
+}
+
+// @function preventDefault(ev: DOMEvent): this
+// Prevents the default action of the DOM Event `ev` from happening (such as
+// following a link in the href of the a element, or doing a POST request
+// with page reload when a `<form>` is submitted).
+// Use it inside listener functions.
+export function preventDefault(e) {
+ if (e.preventDefault) {
+ e.preventDefault();
+ } else {
+ e.returnValue = false;
+ }
+ return this;
+}
+
+// @function stop(ev: DOMEvent): this
+// Does `stopPropagation` and `preventDefault` at the same time.
+export function stop(e) {
+ preventDefault(e);
+ stopPropagation(e);
+ return this;
+}
+
+// @function getMousePosition(ev: DOMEvent, container?: HTMLElement): Point
+// Gets normalized mouse position from a DOM event relative to the
+// `container` or to the whole page if not specified.
+export function getMousePosition(e, container) {
+ if (!container) {
+ return new Point(e.clientX, e.clientY);
+ }
+
+ var rect = container.getBoundingClientRect();
+
+ var scaleX = rect.width / container.offsetWidth || 1;
+ var scaleY = rect.height / container.offsetHeight || 1;
+ return new Point(
+ e.clientX / scaleX - rect.left - container.clientLeft,
+ e.clientY / scaleY - rect.top - container.clientTop);
+}
+
+// Chrome on Win scrolls double the pixels as in other platforms (see #4538),
+// and Firefox scrolls device pixels, not CSS pixels
+var wheelPxFactor =
+ (Browser.win && Browser.chrome) ? 2 * window.devicePixelRatio :
+ Browser.gecko ? window.devicePixelRatio : 1;
+
+// @function getWheelDelta(ev: DOMEvent): Number
+// Gets normalized wheel delta from a mousewheel DOM event, in vertical
+// pixels scrolled (negative if scrolling down).
+// Events from pointing devices without precise scrolling are mapped to
+// a best guess of 60 pixels.
+export function getWheelDelta(e) {
+ return (Browser.edge) ? e.wheelDeltaY / 2 : // Don't trust window-geometry-based delta
+ (e.deltaY && e.deltaMode === 0) ? -e.deltaY / wheelPxFactor : // Pixels
+ (e.deltaY && e.deltaMode === 1) ? -e.deltaY * 20 : // Lines
+ (e.deltaY && e.deltaMode === 2) ? -e.deltaY * 60 : // Pages
+ (e.deltaX || e.deltaZ) ? 0 : // Skip horizontal/depth wheel events
+ e.wheelDelta ? (e.wheelDeltaY || e.wheelDelta) / 2 : // Legacy IE pixels
+ (e.detail && Math.abs(e.detail) < 32765) ? -e.detail * 20 : // Legacy Moz lines
+ e.detail ? e.detail / -32765 * 60 : // Legacy Moz pages
+ 0;
+}
+
+var skipEvents = {};
+
+export function fakeStop(e) {
+ // fakes stopPropagation by setting a special event flag, checked/reset with skipped(e)
+ skipEvents[e.type] = true;
+}
+
+export function skipped(e) {
+ var events = skipEvents[e.type];
+ // reset when checking, as it's only used in map container and propagates outside of the map
+ skipEvents[e.type] = false;
+ return events;
+}
+
+// check if element really left/entered the event target (for mouseenter/mouseleave)
+export function isExternalTarget(el, e) {
+
+ var related = e.relatedTarget;
+
+ if (!related) { return true; }
+
+ try {
+ while (related && (related !== el)) {
+ related = related.parentNode;
+ }
+ } catch (err) {
+ return false;
+ }
+ return (related !== el);
+}
+
+var lastClick;
+
+// this is a horrible workaround for a bug in Android where a single touch triggers two click events
+function filterClick(e, handler) {
+ var timeStamp = (e.timeStamp || (e.originalEvent && e.originalEvent.timeStamp)),
+ elapsed = lastClick && (timeStamp - lastClick);
+
+ // are they closer together than 500ms yet more than 100ms?
+ // Android typically triggers them ~300ms apart while multiple listeners
+ // on the same event should be triggered far faster;
+ // or check if click is simulated on the element, and if it is, reject any non-simulated events
+
+ if ((elapsed && elapsed > 100 && elapsed < 500) || (e.target._simulatedClick && !e._simulated)) {
+ stop(e);
+ return;
+ }
+ lastClick = timeStamp;
+
+ handler(e);
+}
+
+// @function addListener(…): this
+// Alias to [`L.DomEvent.on`](#domevent-on)
+export {on as addListener};
+
+// @function removeListener(…): this
+// Alias to [`L.DomEvent.off`](#domevent-off)
+export {off as removeListener};
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