devextreme
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HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (esm/__internal/ui/resizable/m_resizable.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 _extends from "@babel/runtime/helpers/esm/extends";
import {
locate,
move
} from "../../../common/core/animation/translator";
import eventsEngine from "../../../common/core/events/core/events_engine";
import {
end as dragEventEnd,
move as dragEventMove,
start as dragEventStart
} from "../../../common/core/events/drag";
import {
addNamespace
} from "../../../common/core/events/utils/index";
import {
triggerResizeEvent
} from "../../../common/core/events/visibility_change";
import registerComponent from "../../../core/component_registrator";
import $ from "../../../core/renderer";
import {
pairToObject
} from "../../../core/utils/common";
import {
extend
} from "../../../core/utils/extend";
import {
each
} from "../../../core/utils/iterator";
import {
fitIntoRange,
inRange
} from "../../../core/utils/math";
import {
getHeight,
getInnerHeight,
getInnerWidth,
getOuterHeight,
getOuterWidth,
getWidth
} from "../../../core/utils/size";
import {
isFunction,
isPlainObject,
isWindow
} from "../../../core/utils/type";
import {
hasWindow
} from "../../../core/utils/window";
import DOMComponent from "../../core/widget/dom_component";
const RESIZABLE = "dxResizable";
const RESIZABLE_CLASS = "dx-resizable";
const RESIZABLE_RESIZING_CLASS = "dx-resizable-resizing";
const RESIZABLE_HANDLE_CLASS = "dx-resizable-handle";
const RESIZABLE_HANDLE_TOP_CLASS = "dx-resizable-handle-top";
const RESIZABLE_HANDLE_BOTTOM_CLASS = "dx-resizable-handle-bottom";
const RESIZABLE_HANDLE_LEFT_CLASS = "dx-resizable-handle-left";
const RESIZABLE_HANDLE_RIGHT_CLASS = "dx-resizable-handle-right";
const RESIZABLE_HANDLE_CORNER_CLASS = "dx-resizable-handle-corner";
const DRAGSTART_START_EVENT_NAME = addNamespace(dragEventStart, RESIZABLE);
const DRAGSTART_EVENT_NAME = addNamespace(dragEventMove, RESIZABLE);
const DRAGSTART_END_EVENT_NAME = addNamespace(dragEventEnd, RESIZABLE);
const SIDE_BORDER_WIDTH_STYLES = {
left: "borderLeftWidth",
top: "borderTopWidth",
right: "borderRightWidth",
bottom: "borderBottomWidth"
};
class Resizable extends DOMComponent {
_getDefaultOptions() {
return _extends({}, super._getDefaultOptions(), {
handles: "all",
step: "1",
stepPrecision: "simple",
minWidth: 30,
maxWidth: 1 / 0,
minHeight: 30,
maxHeight: 1 / 0,
onResizeStart: null,
onResize: null,
onResizeEnd: null,
roundStepValue: true,
keepAspectRatio: true
})
}
_init() {
super._init();
this.$element().addClass("dx-resizable")
}
_initMarkup() {
super._initMarkup();
this._renderHandles()
}
_render() {
super._render();
this._renderActions()
}
_renderActions() {
this._resizeStartAction = this._createActionByOption("onResizeStart");
this._resizeEndAction = this._createActionByOption("onResizeEnd");
this._resizeAction = this._createActionByOption("onResize")
}
_renderHandles() {
this._handles = [];
const {
handles: handles
} = this.option();
if ("none" === handles || !handles) {
return
}
const directions = "all" === handles ? ["top", "bottom", "left", "right"] : handles.split(" ");
const activeHandlesMap = {};
each(directions, ((index, handleName) => {
activeHandlesMap[handleName] = true;
this._renderHandle(handleName)
}));
activeHandlesMap.bottom && activeHandlesMap.right && this._renderHandle("corner-bottom-right");
activeHandlesMap.bottom && activeHandlesMap.left && this._renderHandle("corner-bottom-left");
activeHandlesMap.top && activeHandlesMap.right && this._renderHandle("corner-top-right");
activeHandlesMap.top && activeHandlesMap.left && this._renderHandle("corner-top-left");
this._attachEventHandlers()
}
_renderHandle(handleName) {
const $handle = $("<div>").addClass("dx-resizable-handle").addClass(`dx-resizable-handle-${handleName}`).appendTo(this.$element());
this._handles.push($handle)
}
_attachEventHandlers() {
if (this.option("disabled")) {
return
}
const handlers = {};
handlers[DRAGSTART_START_EVENT_NAME] = this._dragStartHandler.bind(this);
handlers[DRAGSTART_EVENT_NAME] = this._dragHandler.bind(this);
handlers[DRAGSTART_END_EVENT_NAME] = this._dragEndHandler.bind(this);
this._handles.forEach((handleElement => {
eventsEngine.on(handleElement, handlers, {
direction: "both",
immediate: true
})
}))
}
_detachEventHandlers() {
this._handles.forEach((handleElement => {
eventsEngine.off(handleElement)
}))
}
_toggleEventHandlers(shouldAttachEvents) {
shouldAttachEvents ? this._attachEventHandlers() : this._detachEventHandlers()
}
_getElementSize() {
const $element = this.$element();
return "border-box" === $element.css("boxSizing") ? {
width: getOuterWidth($element),
height: getOuterHeight($element)
} : {
width: getWidth($element),
height: getHeight($element)
}
}
_dragStartHandler(e) {
var _this$_resizeStartAct;
const $element = this.$element();
if ($element.is(".dx-state-disabled, .dx-state-disabled *")) {
e.cancel = true;
return
}
this._toggleResizingClass(true);
this._movingSides = this._getMovingSides(e);
this._elementLocation = locate($element);
this._elementSize = this._getElementSize();
this._renderDragOffsets(e);
null === (_this$_resizeStartAct = this._resizeStartAction) || void 0 === _this$_resizeStartAct || _this$_resizeStartAct.call(this, {
event: e,
width: this._elementSize.width,
height: this._elementSize.height,
handles: this._movingSides
});
e.targetElements = null
}
_toggleResizingClass(value) {
this.$element().toggleClass("dx-resizable-resizing", value)
}
_renderDragOffsets(e) {
const area = this._getArea();
if (!area) {
return
}
const $handle = $(e.target).closest(".dx-resizable-handle");
const handleWidth = getOuterWidth($handle);
const handleHeight = getOuterHeight($handle);
const handleOffset = $handle.offset();
const areaOffset = area.offset;
const scrollOffset = this._getAreaScrollOffset();
e.maxLeftOffset = this._leftMaxOffset = handleOffset.left - areaOffset.left - scrollOffset.scrollX;
e.maxRightOffset = this._rightMaxOffset = areaOffset.left + area.width - handleOffset.left - handleWidth + scrollOffset.scrollX;
e.maxTopOffset = this._topMaxOffset = handleOffset.top - areaOffset.top - scrollOffset.scrollY;
e.maxBottomOffset = this._bottomMaxOffset = areaOffset.top + area.height - handleOffset.top - handleHeight + scrollOffset.scrollY
}
_getBorderWidth($element, direction) {
if (isWindow($element.get(0))) {
return 0
}
const borderWidth = $element.css(SIDE_BORDER_WIDTH_STYLES[direction]);
return parseInt(borderWidth) || 0
}
_proportionate(direction, value) {
const size = this._elementSize;
const factor = "x" === direction ? size.width / size.height : size.height / size.width;
return value * factor
}
_getProportionalDelta(_ref) {
let {
x: x,
y: y
} = _ref;
const proportionalY = this._proportionate("y", x);
if (proportionalY >= y) {
return {
x: x,
y: proportionalY
}
}
const proportionalX = this._proportionate("x", y);
if (proportionalX >= x) {
return {
x: proportionalX,
y: y
}
}
return {
x: 0,
y: 0
}
}
_getDirectionName(axis) {
const sides = this._movingSides;
if ("x" === axis) {
return sides.left ? "left" : "right"
}
return sides.top ? "top" : "bottom"
}
_fitIntoArea(axis, value) {
const directionName = this._getDirectionName(axis);
return Math.min(value, this[`_${directionName}MaxOffset`] ?? 1 / 0)
}
_fitDeltaProportionally(delta) {
let fittedDelta = _extends({}, delta);
const size = this._elementSize;
const {
minWidth: minWidth,
minHeight: minHeight,
maxWidth: maxWidth,
maxHeight: maxHeight
} = this.option();
const getWidth = () => size.width + fittedDelta.x;
const getHeight = () => size.height + fittedDelta.y;
const isInArea = axis => fittedDelta[axis] === this._fitIntoArea(axis, fittedDelta[axis]);
const isFittedX = () => inRange(getWidth(), minWidth, maxWidth) && isInArea("x");
const isFittedY = () => inRange(getHeight(), minHeight, maxHeight) && isInArea("y");
if (!isFittedX()) {
const x = this._fitIntoArea("x", fitIntoRange(getWidth(), minWidth, maxWidth) - size.width);
fittedDelta = {
x: x,
y: this._proportionate("y", x)
}
}
if (!isFittedY()) {
const y = this._fitIntoArea("y", fitIntoRange(getHeight(), minHeight, maxHeight) - size.height);
fittedDelta = {
x: this._proportionate("x", y),
y: y
}
}
return isFittedX() && isFittedY() ? fittedDelta : {
x: 0,
y: 0
}
}
_fitDelta(_ref2) {
let {
x: x,
y: y
} = _ref2;
const size = this._elementSize;
const {
minWidth: minWidth,
minHeight: minHeight,
maxWidth: maxWidth,
maxHeight: maxHeight
} = this.option();
return {
x: fitIntoRange(size.width + x, minWidth, maxWidth) - size.width,
y: fitIntoRange(size.height + y, minHeight, maxHeight) - size.height
}
}
_getDeltaByOffset(offset) {
const sides = this._movingSides;
const shouldKeepAspectRatio = this._isCornerHandler(sides) && this.option("keepAspectRatio");
let delta = {
x: offset.x * (sides.left ? -1 : 1),
y: offset.y * (sides.top ? -1 : 1)
};
if (shouldKeepAspectRatio) {
const proportionalDelta = this._getProportionalDelta(delta);
const fittedProportionalDelta = this._fitDeltaProportionally(proportionalDelta);
delta = fittedProportionalDelta
} else {
const fittedDelta = this._fitDelta(delta);
const roundedFittedDelta = this._roundByStep(fittedDelta);
delta = roundedFittedDelta
}
return delta
}
_updatePosition(delta, _ref3) {
let {
width: width,
height: height
} = _ref3;
const location = this._elementLocation;
const sides = this._movingSides;
const $element = this.$element();
const elementRect = this._getElementSize();
const offsetTop = delta.y * (sides.top ? -1 : 1) - ((elementRect.height || height) - height);
const offsetLeft = delta.x * (sides.left ? -1 : 1) - ((elementRect.width || width) - width);
move($element, {
top: location.top + (sides.top ? offsetTop : 0),
left: location.left + (sides.left ? offsetLeft : 0)
})
}
_dragHandler(e) {
const offset = this._getOffset(e);
const delta = this._getDeltaByOffset(offset);
const dimensions = this._updateDimensions(delta);
this._updatePosition(delta, dimensions);
this._triggerResizeAction(e, dimensions)
}
_updateDimensions(delta) {
const isAbsoluteSize = size => "px" === size.substring(size.length - 2);
const {
stepPrecision: stepPrecision
} = this.option();
const isStepPrecisionStrict = "strict" === stepPrecision;
const size = this._elementSize;
const width = size.width + delta.x;
const height = size.height + delta.y;
const elementStyle = this.$element().get(0).style;
const shouldRenderWidth = delta.x || isStepPrecisionStrict || isAbsoluteSize(elementStyle.width);
const shouldRenderHeight = delta.y || isStepPrecisionStrict || isAbsoluteSize(elementStyle.height);
if (shouldRenderWidth) {
this.option({
width: width
})
}
if (shouldRenderHeight) {
this.option({
height: height
})
}
return {
width: shouldRenderWidth ? width : size.width,
height: shouldRenderHeight ? height : size.height
}
}
_triggerResizeAction(e, _ref4) {
var _this$_resizeAction;
let {
width: width,
height: height
} = _ref4;
null === (_this$_resizeAction = this._resizeAction) || void 0 === _this$_resizeAction || _this$_resizeAction.call(this, {
event: e,
width: this.option("width") || width,
height: this.option("height") || height,
handles: this._movingSides
});
triggerResizeEvent(this.$element())
}
_isCornerHandler(sides) {
return 0 === Object.values(sides).reduce(((xor, value) => xor ^ value), 0)
}
_getOffset(e) {
const {
offset: offset
} = e;
const sides = this._movingSides;
if (!sides.left && !sides.right) {
offset.x = 0
}
if (!sides.top && !sides.bottom) {
offset.y = 0
}
return offset
}
_roundByStep(delta) {
const {
stepPrecision: stepPrecision
} = this.option();
return "strict" === stepPrecision ? this._roundStrict(delta) : this._roundNotStrict(delta)
}
_getSteps() {
return pairToObject(this.option("step"), !this.option("roundStepValue"))
}
_roundNotStrict(delta) {
const steps = this._getSteps();
return {
x: delta.x - delta.x % steps.h,
y: delta.y - delta.y % steps.v
}
}
_roundStrict(delta) {
const sides = this._movingSides;
const offset = {
x: delta.x * (sides.left ? -1 : 1),
y: delta.y * (sides.top ? -1 : 1)
};
const steps = this._getSteps();
const location = this._elementLocation;
const size = this._elementSize;
const xPos = sides.left ? location.left : location.left + size.width;
const yPos = sides.top ? location.top : location.top + size.height;
const newXShift = (xPos + offset.x) % steps.h;
const newYShift = (yPos + offset.y) % steps.v;
const sign = Math.sign || (x => {
x = +x;
if (0 === x || isNaN(x)) {
return x
}
return x > 0 ? 1 : -1
});
const separatorOffset = (steps, offset) => (1 + .2 * sign(offset)) % 1 * steps;
const isSmallOffset = (offset, steps) => Math.abs(offset) < .2 * steps;
let newOffsetX = offset.x - newXShift;
let newOffsetY = offset.y - newYShift;
if (newXShift > separatorOffset(steps.h, offset.x)) {
newOffsetX += steps.h
}
if (newYShift > separatorOffset(steps.v, offset.y)) {
newOffsetY += steps.v
}
const roundedOffset_x = (sides.left || sides.right) && !isSmallOffset(offset.x, steps.h) ? newOffsetX : 0,
roundedOffset_y = (sides.top || sides.bottom) && !isSmallOffset(offset.y, steps.v) ? newOffsetY : 0;
return {
x: roundedOffset_x * (sides.left ? -1 : 1),
y: roundedOffset_y * (sides.top ? -1 : 1)
}
}
_getMovingSides(e) {
const $target = $(e.target);
const hasCornerTopLeftClass = $target.hasClass("dx-resizable-handle-corner-top-left");
const hasCornerTopRightClass = $target.hasClass("dx-resizable-handle-corner-top-right");
const hasCornerBottomLeftClass = $target.hasClass("dx-resizable-handle-corner-bottom-left");
const hasCornerBottomRightClass = $target.hasClass("dx-resizable-handle-corner-bottom-right");
return {
top: $target.hasClass("dx-resizable-handle-top") || hasCornerTopLeftClass || hasCornerTopRightClass,
left: $target.hasClass("dx-resizable-handle-left") || hasCornerTopLeftClass || hasCornerBottomLeftClass,
bottom: $target.hasClass("dx-resizable-handle-bottom") || hasCornerBottomLeftClass || hasCornerBottomRightClass,
right: $target.hasClass("dx-resizable-handle-right") || hasCornerTopRightClass || hasCornerBottomRightClass
}
}
_getArea() {
let area = this.option("area");
if (isFunction(area)) {
area = area.call(this)
}
if (isPlainObject(area)) {
return this._getAreaFromObject(area)
}
return this._getAreaFromElement(area)
}
_getAreaScrollOffset() {
const area = this.option("area");
const isElement = !isFunction(area) && !isPlainObject(area);
const scrollOffset = {
scrollY: 0,
scrollX: 0
};
if (isElement) {
const areaElement = $(area)[0];
if (isWindow(areaElement)) {
scrollOffset.scrollX = areaElement.pageXOffset;
scrollOffset.scrollY = areaElement.pageYOffset
}
}
return scrollOffset
}
_getAreaFromObject(area) {
const result = {
width: area.right - area.left,
height: area.bottom - area.top,
offset: {
left: area.left,
top: area.top
}
};
this._correctAreaGeometry(result);
return result
}
_getAreaFromElement(area) {
const $area = $(area);
let result;
if ($area.length) {
result = {
width: getInnerWidth($area),
height: getInnerHeight($area),
offset: extend({
top: 0,
left: 0
}, isWindow($area[0]) ? {} : $area.offset())
};
this._correctAreaGeometry(result, $area)
}
return result
}
_correctAreaGeometry(result, $area) {
const areaBorderLeft = $area ? this._getBorderWidth($area, "left") : 0;
const areaBorderTop = $area ? this._getBorderWidth($area, "top") : 0;
result.offset.left += areaBorderLeft + this._getBorderWidth(this.$element(), "left");
result.offset.top += areaBorderTop + this._getBorderWidth(this.$element(), "top");
result.width -= getOuterWidth(this.$element()) - getInnerWidth(this.$element());
result.height -= getOuterHeight(this.$element()) - getInnerHeight(this.$element())
}
_dragEndHandler(e) {
var _this$_resizeEndActio;
const $element = this.$element();
null === (_this$_resizeEndActio = this._resizeEndAction) || void 0 === _this$_resizeEndActio || _this$_resizeEndActio.call(this, {
event: e,
width: getOuterWidth($element),
height: getOuterHeight($element),
handles: this._movingSides
});
this._toggleResizingClass(false)
}
_renderWidth(width) {
this.option("width", fitIntoRange(width, this.option("minWidth"), this.option("maxWidth")))
}
_renderHeight(height) {
this.option("height", fitIntoRange(height, this.option("minHeight"), this.option("maxHeight")))
}
_optionChanged(args) {
switch (args.name) {
case "disabled":
this._toggleEventHandlers(!args.value);
super._optionChanged(args);
break;
case "handles":
this._invalidate();
break;
case "minWidth":
case "maxWidth":
hasWindow() && this._renderWidth(getOuterWidth(this.$element()));
break;
case "minHeight":
case "maxHeight":
hasWindow() && this._renderHeight(getOuterHeight(this.$element()));
break;
case "onResize":
case "onResizeStart":
case "onResizeEnd":
this._renderActions();
break;
case "area":
case "stepPrecision":
case "step":
case "roundStepValue":
case "keepAspectRatio":
break;
default:
super._optionChanged(args)
}
}
_clean() {
this.$element().find(".dx-resizable-handle").remove()
}
_useTemplates() {
return false
}
}
registerComponent(RESIZABLE, Resizable);
export default Resizable;