devextreme
Version:
HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (esm/__internal/ui/popup/m_popup_drag.js)
* Version: 24.2.6
* Build date: Mon Mar 17 2025
*
* Copyright (c) 2012 - 2025 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
import {
locate,
move
} from "../../../common/core/animation/translator";
import eventsEngine from "../../../common/core/events/core/events_engine";
import {
end as dragEndEvent,
move as dragMoveEvent,
start as dragStartEvent
} from "../../../common/core/events/drag";
import {
addNamespace
} from "../../../common/core/events/utils/index";
import domAdapter from "../../../core/dom_adapter";
import {
fitIntoRange
} from "../../../core/utils/math";
import {
getOffset,
getOuterHeight,
getOuterWidth
} from "../../../core/utils/size";
import {
isWindow
} from "../../../core/utils/type";
const KEYBOARD_DRAG_STEP = 5;
class PopupDrag {
constructor(config) {
this.init(config)
}
init(_ref) {
let {
dragEnabled: dragEnabled,
handle: handle,
draggableElement: draggableElement,
positionController: positionController
} = _ref;
this._positionController = positionController;
this._draggableElement = draggableElement;
this._handle = handle;
this._dragEnabled = dragEnabled;
this.unsubscribe();
if (!dragEnabled) {
return
}
this.subscribe()
}
moveDown(e) {
this._moveTo(5, 0, e)
}
moveUp(e) {
this._moveTo(-5, 0, e)
}
moveLeft(e) {
this._moveTo(0, -5, e)
}
moveRight(e) {
this._moveTo(0, 5, e)
}
subscribe() {
const eventNames = this._getEventNames();
eventsEngine.on(this._handle, eventNames.startEventName, (e => {
this._dragStartHandler(e)
}));
eventsEngine.on(this._handle, eventNames.updateEventName, (e => {
this._dragUpdateHandler(e)
}));
eventsEngine.on(this._handle, eventNames.endEventName, (e => {
this._dragEndHandler(e)
}))
}
unsubscribe() {
const eventNames = this._getEventNames();
eventsEngine.off(this._handle, eventNames.startEventName);
eventsEngine.off(this._handle, eventNames.updateEventName);
eventsEngine.off(this._handle, eventNames.endEventName)
}
_getEventNames() {
const startEventName = addNamespace(dragStartEvent, "overlayDrag");
const updateEventName = addNamespace(dragMoveEvent, "overlayDrag");
const endEventName = addNamespace(dragEndEvent, "overlayDrag");
return {
startEventName: startEventName,
updateEventName: updateEventName,
endEventName: endEventName
}
}
_dragStartHandler(e) {
const allowedOffsets = this._getAllowedOffsets();
this._prevOffset = {
x: 0,
y: 0
};
e.targetElements = [];
e.maxTopOffset = allowedOffsets.top;
e.maxBottomOffset = allowedOffsets.bottom;
e.maxLeftOffset = allowedOffsets.left;
e.maxRightOffset = allowedOffsets.right
}
_dragUpdateHandler(e) {
const targetOffset = {
top: e.offset.y - this._prevOffset.y,
left: e.offset.x - this._prevOffset.x
};
this._moveByOffset(targetOffset);
this._prevOffset = e.offset
}
_dragEndHandler(event) {
this._positionController.dragHandled();
this._positionController.detectVisualPositionChange(event)
}
_moveTo(top, left, e) {
if (!this._dragEnabled) {
return
}
e.preventDefault();
e.stopPropagation();
const offset = this._fitOffsetIntoAllowedRange(top, left);
this._moveByOffset(offset);
this._dragEndHandler(e)
}
_fitOffsetIntoAllowedRange(top, left) {
const allowedOffsets = this._getAllowedOffsets();
return {
top: fitIntoRange(top, -allowedOffsets.top, allowedOffsets.bottom),
left: fitIntoRange(left, -allowedOffsets.left, allowedOffsets.right)
}
}
_getContainerDimensions() {
const document = domAdapter.getDocument();
const container = this._positionController.$dragResizeContainer.get(0);
let containerWidth = getOuterWidth(container);
let containerHeight = getOuterHeight(container);
if (isWindow(container)) {
containerHeight = Math.max(document.body.clientHeight, containerHeight);
containerWidth = Math.max(document.body.clientWidth, containerWidth)
}
return {
width: containerWidth,
height: containerHeight
}
}
_getContainerPosition() {
const container = this._positionController.$dragResizeContainer.get(0);
return isWindow(container) ? {
top: 0,
left: 0
} : getOffset(container)
}
_getElementPosition() {
return getOffset(this._draggableElement)
}
_getInnerDelta() {
const containerDimensions = this._getContainerDimensions();
const elementDimensions = this._getElementDimensions();
return {
x: containerDimensions.width - elementDimensions.width,
y: containerDimensions.height - elementDimensions.height
}
}
_getOuterDelta() {
const {
width: width,
height: height
} = this._getElementDimensions();
const {
outsideDragFactor: outsideDragFactor
} = this._positionController;
return {
x: width * outsideDragFactor,
y: height * outsideDragFactor
}
}
_getFullDelta() {
const fullDelta = this._getInnerDelta();
const outerDelta = this._getOuterDelta();
return {
x: fullDelta.x + outerDelta.x,
y: fullDelta.y + outerDelta.y
}
}
_getElementDimensions() {
return {
width: this._draggableElement.offsetWidth,
height: this._draggableElement.offsetHeight
}
}
_getAllowedOffsets() {
const fullDelta = this._getFullDelta();
const isDragAllowed = fullDelta.y >= 0 && fullDelta.x >= 0;
if (!isDragAllowed) {
return {
top: 0,
bottom: 0,
left: 0,
right: 0
}
}
const elementPosition = this._getElementPosition();
const containerPosition = this._getContainerPosition();
const outerDelta = this._getOuterDelta();
return {
top: elementPosition.top - containerPosition.top + outerDelta.y,
bottom: -elementPosition.top + containerPosition.top + fullDelta.y,
left: elementPosition.left - containerPosition.left + outerDelta.x,
right: -elementPosition.left + containerPosition.left + fullDelta.x
}
}
_moveByOffset(offset) {
const currentPosition = locate(this._draggableElement);
const newPosition = {
left: currentPosition.left + offset.left,
top: currentPosition.top + offset.top
};
move(this._draggableElement, newPosition)
}
}
export default PopupDrag;