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kendo.draganddrop.js
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import "./kendo.core.js";
import "./kendo.userevents.js";
export const __meta__ = {
id: "draganddrop",
name: "Drag & drop",
category: "framework",
description: "Drag & drop functionality for any DOM element.",
depends: [ "core", "userevents" ]
};
(function($, undefined) {
var kendo = window.kendo,
support = kendo.support,
document = window.document,
$window = $(window),
Class = kendo.Class,
Widget = kendo.ui.Widget,
Observable = kendo.Observable,
UserEvents = kendo.UserEvents,
ClickMoveClick = kendo.ClickMoveClick,
extend = $.extend,
getOffset = kendo.getOffset,
draggables = {},
dropTargets = {},
dropAreas = {},
lastDropTarget,
elementUnderCursor = kendo.elementUnderCursor,
KEYUP = "keyup",
CHANGE = "change",
// Draggable events
DRAGSTART = "dragstart",
HOLD = "hold",
DRAG = "drag",
DRAGEND = "dragend",
DRAGCANCEL = "dragcancel",
HINTDESTROYED = "hintDestroyed",
// DropTarget events
DRAGENTER = "dragenter",
DRAGLEAVE = "dragleave",
DROP = "drop";
function contains(parent, child) {
try {
return $.contains(parent, child) || parent == child;
} catch (e) {
return false;
}
}
function numericCssPropery(element, property) {
return parseInt(element.css(property), 10) || 0;
}
function within(value, range) {
return Math.min(Math.max(value, range.min), range.max);
}
function containerBoundaries(container, element) {
var offset = getOffset(container),
outerWidth = kendo._outerWidth,
outerHeight = kendo._outerHeight,
minX = offset.left + numericCssPropery(container, "borderLeftWidth") + numericCssPropery(container, "paddingLeft"),
minY = offset.top + numericCssPropery(container, "borderTopWidth") + numericCssPropery(container, "paddingTop"),
maxX = minX + container.width() - outerWidth(element, true),
maxY = minY + container.height() - outerHeight(element, true);
return {
x: { min: minX, max: maxX },
y: { min: minY, max: maxY }
};
}
function checkTarget(target, targets, areas) {
var theTarget, theFilter, i = 0,
targetLen = targets && targets.length,
areaLen = areas && areas.length;
while (target && target.parentNode) {
for (i = 0; i < targetLen; i ++) {
theTarget = targets[i];
if (theTarget.element[0] === target) {
return { target: theTarget, targetElement: target };
}
}
for (i = 0; i < areaLen; i ++) {
theFilter = areas[i];
if ($.contains(theFilter.element[0], target) && support.matchesSelector.call(target, theFilter.options.filter)) {
return { target: theFilter, targetElement: target };
}
}
target = target.parentNode;
}
return undefined;
}
var TapCapture = Observable.extend({
init: function(element, options) {
var that = this,
domElement = element[0];
that.capture = false;
if (domElement.addEventListener) {
$.each(kendo.eventMap.down.split(" "), function() {
domElement.addEventListener(this, that._press.bind(that), true);
});
$.each(kendo.eventMap.up.split(" "), function() {
domElement.addEventListener(this, that._release.bind(that), true);
});
} else {
$.each(kendo.eventMap.down.split(" "), function() {
domElement.attachEvent(this, that._press.bind(that));
});
$.each(kendo.eventMap.up.split(" "), function() {
domElement.attachEvent(this, that._release.bind(that));
});
}
Observable.fn.init.call(that);
that.bind(["press", "release"], options || {});
},
captureNext: function() {
this.capture = true;
},
cancelCapture: function() {
this.capture = false;
},
_press: function(e) {
var that = this;
that.trigger("press");
if (that.capture) {
e.preventDefault();
}
},
_release: function(e) {
var that = this;
that.trigger("release");
if (that.capture) {
e.preventDefault();
that.cancelCapture();
}
}
});
var PaneDimension = Observable.extend({
init: function(options) {
var that = this;
Observable.fn.init.call(that);
that.forcedEnabled = false;
$.extend(that, options);
that.scale = 1;
if (that.horizontal) {
that.measure = "offsetWidth";
that.scrollSize = "scrollWidth";
that.axis = "x";
} else {
that.measure = "offsetHeight";
that.scrollSize = "scrollHeight";
that.axis = "y";
}
},
makeVirtual: function() {
$.extend(this, {
virtual: true,
forcedEnabled: true,
_virtualMin: 0,
_virtualMax: 0
});
},
virtualSize: function(min, max) {
if (this._virtualMin !== min || this._virtualMax !== max) {
this._virtualMin = min;
this._virtualMax = max;
this.update();
}
},
outOfBounds: function(offset) {
return offset > this.max || offset < this.min;
},
forceEnabled: function() {
this.forcedEnabled = true;
},
getSize: function() {
return this.container[0][this.measure];
},
getTotal: function() {
return this.element[0][this.scrollSize];
},
rescale: function(scale) {
this.scale = scale;
},
update: function(silent) {
var that = this,
total = that.virtual ? that._virtualMax : that.getTotal(),
scaledTotal = total * that.scale,
size = that.getSize();
if (total === 0 && !that.forcedEnabled) {
return; // we are not visible.
}
that.max = that.virtual ? -that._virtualMin : 0;
that.size = size;
that.total = scaledTotal;
that.min = Math.min(that.max, size - scaledTotal);
that.minScale = size / total;
that.centerOffset = (scaledTotal - size) / 2;
that.enabled = that.forcedEnabled || (scaledTotal > size);
if (!silent) {
that.trigger(CHANGE, that);
}
}
});
var PaneDimensions = Observable.extend({
init: function(options) {
var that = this;
Observable.fn.init.call(that);
that.x = new PaneDimension(extend({ horizontal: true }, options));
that.y = new PaneDimension(extend({ horizontal: false }, options));
that.container = options.container;
that.forcedMinScale = options.minScale;
that.maxScale = options.maxScale || 100;
that.bind(CHANGE, options);
},
rescale: function(newScale) {
this.x.rescale(newScale);
this.y.rescale(newScale);
this.refresh();
},
centerCoordinates: function() {
return { x: Math.min(0, -this.x.centerOffset), y: Math.min(0, -this.y.centerOffset) };
},
refresh: function() {
var that = this;
that.x.update();
that.y.update();
that.enabled = that.x.enabled || that.y.enabled;
that.minScale = that.forcedMinScale || Math.min(that.x.minScale, that.y.minScale);
that.fitScale = Math.max(that.x.minScale, that.y.minScale);
that.trigger(CHANGE);
}
});
var PaneAxis = Observable.extend({
init: function(options) {
var that = this;
extend(that, options);
Observable.fn.init.call(that);
},
outOfBounds: function() {
return this.dimension.outOfBounds(this.movable[this.axis]);
},
dragMove: function(delta) {
var that = this,
dimension = that.dimension,
axis = that.axis,
movable = that.movable,
position = movable[axis] + delta;
if (!dimension.enabled) {
return;
}
if ((position < dimension.min && delta < 0) || (position > dimension.max && delta > 0)) {
delta *= that.resistance;
}
movable.translateAxis(axis, delta);
that.trigger(CHANGE, that);
}
});
var Pane = Class.extend({
init: function(options) {
var that = this,
x,
y,
resistance,
movable;
extend(that, { elastic: true }, options);
resistance = that.elastic ? 0.5 : 0;
movable = that.movable;
that.x = x = new PaneAxis({
axis: "x",
dimension: that.dimensions.x,
resistance: resistance,
movable: movable
});
that.y = y = new PaneAxis({
axis: "y",
dimension: that.dimensions.y,
resistance: resistance,
movable: movable
});
that.userEvents.bind(["press", "move", "end", "gesturestart", "gesturechange"], {
gesturestart: function(e) {
that.gesture = e;
that.offset = that.dimensions.container.offset();
},
press: function(e) {
if ($(e.event.target).closest("a").is("[data-navigate-on-press=true]")) {
e.sender.cancel();
}
},
gesturechange: function(e) {
var previousGesture = that.gesture,
previousCenter = previousGesture.center,
center = e.center,
scaleDelta = e.distance / previousGesture.distance,
minScale = that.dimensions.minScale,
maxScale = that.dimensions.maxScale,
coordinates;
if (movable.scale <= minScale && scaleDelta < 1) {
// Resist shrinking. Instead of shrinking from 1 to 0.5, it will shrink to 0.5 + (1 /* minScale */ - 0.5) * 0.8 = 0.9;
scaleDelta += (1 - scaleDelta) * 0.8;
}
if (movable.scale * scaleDelta >= maxScale) {
scaleDelta = maxScale / movable.scale;
}
var offsetX = movable.x + that.offset.left,
offsetY = movable.y + that.offset.top;
coordinates = {
x: (offsetX - previousCenter.x) * scaleDelta + center.x - offsetX,
y: (offsetY - previousCenter.y) * scaleDelta + center.y - offsetY
};
movable.scaleWith(scaleDelta);
x.dragMove(coordinates.x);
y.dragMove(coordinates.y);
that.dimensions.rescale(movable.scale);
that.gesture = e;
e.preventDefault();
},
move: function(e) {
if (e.event.target.tagName.match(/textarea|input/i)) {
return;
}
if (x.dimension.enabled || y.dimension.enabled) {
x.dragMove(e.x.delta);
y.dragMove(e.y.delta);
e.preventDefault();
} else {
e.touch.skip();
}
},
end: function(e) {
e.preventDefault();
}
});
}
});
var TRANSFORM_STYLE = "transform",
translate;
if (support.hasHW3D) {
translate = function(x, y, scale) {
return "translate3d(" + x + "px," + y + "px,0) scale(" + scale + ")";
};
} else {
translate = function(x, y, scale) {
return "translate(" + x + "px," + y + "px) scale(" + scale + ")";
};
}
var Movable = Observable.extend({
init: function(element) {
var that = this;
Observable.fn.init.call(that);
that.element = $(element);
that.element[0].style.webkitTransformOrigin = "left top";
that.x = 0;
that.y = 0;
that.scale = 1;
that._saveCoordinates(translate(that.x, that.y, that.scale));
},
translateAxis: function(axis, by) {
this[axis] += by;
this.refresh();
},
scaleTo: function(scale) {
this.scale = scale;
this.refresh();
},
scaleWith: function(scaleDelta) {
this.scale *= scaleDelta;
this.refresh();
},
translate: function(coordinates) {
this.x += coordinates.x;
this.y += coordinates.y;
this.refresh();
},
moveAxis: function(axis, value) {
this[axis] = value;
this.refresh();
},
moveTo: function(coordinates) {
extend(this, { x: coordinates.x, y: coordinates.y });
this.refresh();
},
refresh: function() {
var that = this,
x = that.x,
y = that.y,
newCoordinates;
if (that.round) {
x = Math.round(x);
y = Math.round(y);
}
newCoordinates = translate(x, y, that.scale);
if (newCoordinates != that.coordinates) {
if (kendo.support.browser.msie && kendo.support.browser.version < 10) {
that.element[0].style.position = "absolute";
that.element[0].style.left = that.x + "px";
that.element[0].style.top = that.y + "px";
} else {
that.element[0].style[TRANSFORM_STYLE] = newCoordinates;
}
that._saveCoordinates(newCoordinates);
that.trigger(CHANGE);
}
},
_saveCoordinates: function(coordinates) {
this.coordinates = coordinates;
}
});
function destroyDroppable(collection, widget) {
var groupName = widget.options.group,
droppables = collection[groupName],
i;
Widget.fn.destroy.call(widget);
if (droppables.length > 1) {
for (i = 0; i < droppables.length; i++) {
if (droppables[i] == widget) {
droppables.splice(i, 1);
break;
}
}
} else {
droppables.length = 0; // WTF, porting this from the previous destroyGroup
delete collection[groupName];
}
}
var DropTarget = Widget.extend({
init: function(element, options) {
var that = this;
Widget.fn.init.call(that, element, options);
var group = that.options.group;
if (!(group in dropTargets)) {
dropTargets[group] = [ that ];
} else {
dropTargets[group].push( that );
}
},
events: [
DRAGENTER,
DRAGLEAVE,
DROP
],
options: {
name: "DropTarget",
group: "default"
},
destroy: function() {
destroyDroppable(dropTargets, this);
},
_trigger: function(eventName, e) {
var that = this,
draggable = draggables[that.options.group];
if (draggable) {
return that.trigger(eventName, extend({}, e.event, {
draggable: draggable,
dropTarget: e.dropTarget
}));
}
},
_over: function(e) {
this._trigger(DRAGENTER, e);
},
_out: function(e) {
this._trigger(DRAGLEAVE, e);
},
_drop: function(e) {
var that = this,
draggable = draggables[that.options.group];
if (draggable) {
draggable.dropped = !that._trigger(DROP, e);
}
}
});
DropTarget.destroyGroup = function(groupName) {
var group = dropTargets[groupName] || dropAreas[groupName],
i;
if (group) {
for (i = 0; i < group.length; i++) {
Widget.fn.destroy.call(group[i]);
}
group.length = 0;
delete dropTargets[groupName];
delete dropAreas[groupName];
}
};
DropTarget._cache = dropTargets;
var DropTargetArea = DropTarget.extend({
init: function(element, options) {
var that = this;
Widget.fn.init.call(that, element, options);
var group = that.options.group;
if (!(group in dropAreas)) {
dropAreas[group] = [ that ];
} else {
dropAreas[group].push( that );
}
},
destroy: function() {
destroyDroppable(dropAreas, this);
},
options: {
name: "DropTargetArea",
group: "default",
filter: null
}
});
var Draggable = Widget.extend({
init: function(element, options) {
var that = this;
Widget.fn.init.call(that, element, options);
that._activated = false;
if (this.options.clickMoveClick) {
that.clickMoveClick = new ClickMoveClick(that.element, {
global: true,
filter: that.options.filter,
start: that._startClickMoveClick.bind(that),
move: that._drag.bind(that),
end: that._end.bind(that),
cancel: that._onCancel.bind(that)
});
}
that.userEvents = new UserEvents(that.element, {
global: true,
allowSelection: true,
filter: that.options.filter,
threshold: that.options.distance,
start: that._start.bind(that),
hold: that._hold.bind(that),
move: that._drag.bind(that),
end: that._end.bind(that),
cancel: that._onCancel.bind(that),
select: that._select.bind(that),
press: that._press.bind(that),
});
if (kendo.support.touch && !options.allowTouchActions) {
that.element.find(that.options.filter).css('touch-action', 'none');
}
that._afterEndHandler = that._afterEnd.bind(that);
that._captureEscape = that._captureEscape.bind(that);
},
events: [
HOLD,
DRAGSTART,
DRAG,
DRAGEND,
DRAGCANCEL,
HINTDESTROYED
],
options: {
name: "Draggable",
distance: ( kendo.support.touch ? 0 : 5),
group: "default",
cursorOffset: null,
axis: null,
container: null,
filter: null,
ignore: null,
holdToDrag: false,
showHintOnHold: false,
autoScroll: false,
dropped: false,
clickMoveClick: false,
preventOsHoldFeatures: false,
allowTouchActions: false,
},
cancelHold: function() {
this._activated = false;
},
_captureEscape: function(e) {
var that = this;
if (e.keyCode === kendo.keys.ESC) {
that.userEvents.cancel();
if (that.clickMoveClick) {
that.clickMoveClick.cancel();
}
this._trigger(DRAGCANCEL, { event: e });
}
},
_updateHint: function(e) {
var that = this,
coordinates,
options = that.options,
boundaries = that.boundaries,
axis = options.axis,
cursorOffset = that.options.cursorOffset,
updateHint = options.updateHint;
if (cursorOffset) {
coordinates = { left: e.x.location + cursorOffset.left, top: e.y.location + cursorOffset.top };
} else {
if (e.x.delta !== 0 || e.y.delta !== 0) {
that.hintOffset.left += e.x.delta;
that.hintOffset.top += e.y.delta;
coordinates = $.extend({}, that.hintOffset);
} else {
that.hintOffset.left = e.x.startLocation + e.x.initialDelta;
that.hintOffset.top = e.y.startLocation + e.y.initialDelta;
coordinates = $.extend({}, that.hintOffset);
}
}
if (boundaries) {
coordinates.top = within(coordinates.top, boundaries.y);
coordinates.left = within(coordinates.left, boundaries.x);
}
if (axis === "x") {
delete coordinates.top;
} else if (axis === "y") {
delete coordinates.left;
}
if (updateHint && kendo.isFunction(updateHint)) {
return $(updateHint.call(that, that.hint, e));
}
that.hint.css(coordinates);
},
_shouldIgnoreTarget: function(target) {
var ignoreSelector = this.options.ignore;
return ignoreSelector && $(target).is(ignoreSelector);
},
_select: function(e) {
if (!this._shouldIgnoreTarget(e.event.target)) {
e.preventDefault();
}
},
_startClickMoveClick: function(e) {
this._activated = true;
this._start(e);
},
_hint: function() {
var that = this,
hint = that.options.hint;
if (hint) {
if (that.hint) {
that.hint.stop(true, true).remove();
}
that.hint = kendo.isFunction(hint) ? $(hint.call(that, that.currentTarget)) : hint;
var offset = getOffset(that.currentTarget);
that.hintOffset = offset;
that.hint.css({
position: "absolute",
zIndex: 20000, // the Window's z-index is 10000 and can be raised because of z-stacking
left: offset.left,
top: offset.top,
})
.appendTo(document.body);
}
},
_start: function(e) {
var that = this,
options = that.options,
container = options.container ? $(options.container) : null,
hint = options.hint;
if (this._shouldIgnoreTarget(e.touch.initialTouch) || (options.holdToDrag && !that._activated)) {
that.userEvents.cancel();
return;
}
that.currentTarget = e.target;
that.currentTargetOffset = getOffset(that.currentTarget);
if (hint) {
that._hint();
}
draggables[options.group] = that;
that.dropped = false;
if (container) {
that.boundaries = containerBoundaries(container, that.hint);
}
$(document).on(KEYUP, that._captureEscape);
if (that._trigger(DRAGSTART, e)) {
that.userEvents.cancel();
if (that.clickMoveClick) {
that.clickMoveClick.cancel();
}
that._afterEnd();
}
that.userEvents.capture();
},
_hold: function(e) {
this.currentTarget = e.target;
if (this._trigger(HOLD, e)) {
this.userEvents.cancel();
} else {
this._activated = true;
if (this.options.showHintOnHold) {
this._hint();
}
}
},
_drag: function(e) {
e.preventDefault();
var cursorElement = this._elementUnderCursor(e);
if (this.options.autoScroll && this._cursorElement !== cursorElement) {
this._scrollableParent = findScrollableParent(cursorElement);
this._cursorElement = cursorElement;
}
this._lastEvent = e;
this._processMovement(e, cursorElement);
if (this.options.autoScroll) {
// chrome seems to trigger mousemove when mouse is moved outside of the window (over the Chrome), too.
if (this._scrollableParent[0]) {
var velocity = autoScrollVelocity(e.x.location, e.y.location, scrollableViewPort(this._scrollableParent));
this._scrollCompenstation = $.extend({}, this.hintOffset);
this._scrollVelocity = velocity;
if (velocity.y === 0 && velocity.x === 0) {
clearInterval(this._scrollInterval);
this._scrollInterval = null;
} else if (!this._scrollInterval) {
this._scrollInterval = setInterval(this._autoScroll.bind(this), 50);
}
}
}
if (this.hint) {
this._updateHint(e);
}
},
_processMovement: function(e, cursorElement) {
this._withDropTarget(cursorElement, function(target, targetElement) {
if (!target) {
if (lastDropTarget) {
lastDropTarget._trigger(DRAGLEAVE, extend(e, { dropTarget: $(lastDropTarget.targetElement) }));
lastDropTarget = null;
}
return;
}
if (lastDropTarget) {
if (targetElement === lastDropTarget.targetElement) {
return;
}
lastDropTarget._trigger(DRAGLEAVE, extend(e, { dropTarget: $(lastDropTarget.targetElement) }));
}
target._trigger(DRAGENTER, extend(e, { dropTarget: $(targetElement) }));
lastDropTarget = extend(target, { targetElement: targetElement });
});
this._trigger(DRAG, extend(e, { dropTarget: lastDropTarget, elementUnderCursor: cursorElement }));
},
_autoScroll: function() {
var parent = this._scrollableParent[0],
velocity = this._scrollVelocity,
compensation = this._scrollCompenstation;
if (!parent) {
return;
}
var cursorElement = this._elementUnderCursor(this._lastEvent);
this._processMovement(this._lastEvent, cursorElement);
var yIsScrollable, xIsScrollable;
var isRootNode = parent === scrollableRoot()[0];
if (isRootNode) {
yIsScrollable = document.body.scrollHeight > $window.height();
xIsScrollable = document.body.scrollWidth > $window.width();
} else {
yIsScrollable = parent.offsetHeight <= parent.scrollHeight;
xIsScrollable = parent.offsetWidth <= parent.scrollWidth;
}
var yDelta = parent.scrollTop + velocity.y;
var yInBounds = yIsScrollable && yDelta > 0 && yDelta < parent.scrollHeight;
var xDelta = parent.scrollLeft + velocity.x;
var xInBounds = xIsScrollable && xDelta > 0 && xDelta < parent.scrollWidth;
if (yInBounds) {
parent.scrollTop += velocity.y;
} else if (yIsScrollable && yDelta < 0) {
parent.scrollTop = 0;
}
if (xInBounds) {
parent.scrollLeft += velocity.x;
} else if (xIsScrollable && xDelta < 0) {
parent.scrollLeft = 0;
}
if (this.hint && isRootNode && (xInBounds || yInBounds)) {
if (yInBounds) {
compensation.top += velocity.y;
}
if (xInBounds) {
compensation.left += velocity.x;
}
this.hint.css(compensation);
}
},
_press: function(ev) {
if (this.options.preventOsHoldFeatures) {
ev.target.css('-webkit-user-select', 'none');
ev.target.attr('unselectable', 'on');
ev.target.one('contextmenu', (ev) => {
ev.preventDefault();
});
}
},
_end: function(e) {
this._withDropTarget(this._elementUnderCursor(e), function(target, targetElement) {
if (target) {
target._drop(extend({}, e, { dropTarget: $(targetElement) }));
lastDropTarget = null;
}
});
clearInterval(this._scrollInterval);
this._scrollInterval = null;
this._cancel(this._trigger(DRAGEND, e));
},
_onCancel: function(e) {
this._cancel();
this._trigger(DRAGCANCEL, { event: e });
},
_cancel: function(isDefaultPrevented) {
var that = this;
that._scrollableParent = null;
this._cursorElement = null;
clearInterval(this._scrollInterval);
that._activated = false;
if (that.hint && !that.dropped) {
setTimeout(function() {
that.hint.stop(true, true);
if (isDefaultPrevented) {