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356 lines (326 loc) · 12.7 KB
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/**
* dd-resizable.ts 10.3.0-dev
* Copyright (c) 2021-2022 Alain Dumesny - see GridStack root license
*/
import { DDResizableHandle } from './dd-resizable-handle';
import { DDBaseImplement, HTMLElementExtendOpt } from './dd-base-impl';
import { Utils } from './utils';
import { DDUIData, GridItemHTMLElement, Rect, Size } from './types';
import { DDManager } from './dd-manager';
// import { GridItemHTMLElement } from './types'; let count = 0; // TEST
// TODO: merge with DDDragOpt
export interface DDResizableOpt {
autoHide?: boolean;
handles?: string;
maxHeight?: number;
maxWidth?: number;
minHeight?: number;
minWidth?: number;
start?: (event: Event, ui: DDUIData) => void;
stop?: (event: Event) => void;
resize?: (event: Event, ui: DDUIData) => void;
}
interface RectScaleReciprocal {
x: number;
y: number;
}
export class DDResizable extends DDBaseImplement implements HTMLElementExtendOpt<DDResizableOpt> {
/** @internal */
protected handlers: DDResizableHandle[];
/** @internal */
protected originalRect: Rect;
/** @internal */
protected rectScale: RectScaleReciprocal = { x: 1, y: 1 };
/** @internal */
protected temporalRect: Rect;
/** @internal */
protected scrollY: number;
/** @internal */
protected scrolled: number;
/** @internal */
protected scrollEl: HTMLElement;
/** @internal */
protected startEvent: MouseEvent;
/** @internal value saved in the same order as _originStyleProp[] */
protected elOriginStyleVal: string[];
/** @internal */
protected parentOriginStylePosition: string;
/** @internal */
protected static _originStyleProp = ['width', 'height', 'position', 'left', 'top', 'opacity', 'zIndex'];
/** @internal */
protected sizeToContent: boolean;
// have to be public else complains for HTMLElementExtendOpt ?
constructor(public el: GridItemHTMLElement, public option: DDResizableOpt = {}) {
super();
// create var event binding so we can easily remove and still look like TS methods (unlike anonymous functions)
this._mouseOver = this._mouseOver.bind(this);
this._mouseOut = this._mouseOut.bind(this);
this.enable();
this._setupAutoHide(this.option.autoHide);
this._setupHandlers();
}
public on(event: 'resizestart' | 'resize' | 'resizestop', callback: (event: DragEvent) => void): void {
super.on(event, callback);
}
public off(event: 'resizestart' | 'resize' | 'resizestop'): void {
super.off(event);
}
public enable(): void {
super.enable();
this.el.classList.remove('ui-resizable-disabled');
this._setupAutoHide(this.option.autoHide);
}
public disable(): void {
super.disable();
this.el.classList.add('ui-resizable-disabled');
this._setupAutoHide(false);
}
public destroy(): void {
this._removeHandlers();
this._setupAutoHide(false);
delete this.el;
super.destroy();
}
public updateOption(opts: DDResizableOpt): DDResizable {
let updateHandles = (opts.handles && opts.handles !== this.option.handles);
let updateAutoHide = (opts.autoHide && opts.autoHide !== this.option.autoHide);
Object.keys(opts).forEach(key => this.option[key] = opts[key]);
if (updateHandles) {
this._removeHandlers();
this._setupHandlers();
}
if (updateAutoHide) {
this._setupAutoHide(this.option.autoHide);
}
return this;
}
/** @internal turns auto hide on/off */
protected _setupAutoHide(auto: boolean): DDResizable {
if (auto) {
this.el.classList.add('ui-resizable-autohide');
// use mouseover and not mouseenter to get better performance and track for nested cases
this.el.addEventListener('mouseover', this._mouseOver);
this.el.addEventListener('mouseout', this._mouseOut);
} else {
this.el.classList.remove('ui-resizable-autohide');
this.el.removeEventListener('mouseover', this._mouseOver);
this.el.removeEventListener('mouseout', this._mouseOut);
if (DDManager.overResizeElement === this) {
delete DDManager.overResizeElement;
}
}
return this;
}
/** @internal */
// eslint-disable-next-line @typescript-eslint/no-unused-vars
protected _mouseOver(e: Event): void {
// console.log(`${count++} pre-enter ${(this.el as GridItemHTMLElement).gridstackNode._id}`)
// already over a child, ignore. Ideally we just call e.stopPropagation() but see https://github.com/gridstack/gridstack.js/issues/2018
if (DDManager.overResizeElement || DDManager.dragElement) return;
DDManager.overResizeElement = this;
// console.log(`${count++} enter ${(this.el as GridItemHTMLElement).gridstackNode._id}`)
this.el.classList.remove('ui-resizable-autohide');
}
/** @internal */
// eslint-disable-next-line @typescript-eslint/no-unused-vars
protected _mouseOut(e: Event): void {
// console.log(`${count++} pre-leave ${(this.el as GridItemHTMLElement).gridstackNode._id}`)
if (DDManager.overResizeElement !== this) return;
delete DDManager.overResizeElement;
// console.log(`${count++} leave ${(this.el as GridItemHTMLElement).gridstackNode._id}`)
this.el.classList.add('ui-resizable-autohide');
}
/** @internal */
protected _setupHandlers(): DDResizable {
this.handlers = this.option.handles.split(',')
.map(dir => dir.trim())
.map(dir => new DDResizableHandle(this.el, dir, {
start: (event: MouseEvent) => {
this._resizeStart(event);
},
stop: (event: MouseEvent) => {
this._resizeStop(event);
},
move: (event: MouseEvent) => {
this._resizing(event, dir);
}
}));
return this;
}
/** @internal */
protected _resizeStart(event: MouseEvent): DDResizable {
this.sizeToContent = Utils.shouldSizeToContent(this.el.gridstackNode, true); // strick true only and not number
this.originalRect = this.el.getBoundingClientRect();
this.scrollEl = Utils.getScrollElement(this.el);
this.scrollY = this.scrollEl.scrollTop;
this.scrolled = 0;
this.startEvent = event;
this._setupHelper();
this._applyChange();
const ev = Utils.initEvent<MouseEvent>(event, { type: 'resizestart', target: this.el });
if (this.option.start) {
this.option.start(ev, this._ui());
}
this.el.classList.add('ui-resizable-resizing');
this.triggerEvent('resizestart', ev);
return this;
}
/** @internal */
protected _resizing(event: MouseEvent, dir: string): DDResizable {
this.scrolled = this.scrollEl.scrollTop - this.scrollY;
this.temporalRect = this._getChange(event, dir);
this._applyChange();
const ev = Utils.initEvent<MouseEvent>(event, { type: 'resize', target: this.el });
if (this.option.resize) {
this.option.resize(ev, this._ui());
}
this.triggerEvent('resize', ev);
return this;
}
/** @internal */
protected _resizeStop(event: MouseEvent): DDResizable {
const ev = Utils.initEvent<MouseEvent>(event, { type: 'resizestop', target: this.el });
if (this.option.stop) {
this.option.stop(ev); // Note: ui() not used by gridstack so don't pass
}
this.el.classList.remove('ui-resizable-resizing');
this.triggerEvent('resizestop', ev);
this._cleanHelper();
delete this.startEvent;
delete this.originalRect;
delete this.temporalRect;
delete this.scrollY;
delete this.scrolled;
return this;
}
/** @internal */
protected _setupHelper(): DDResizable {
this.elOriginStyleVal = DDResizable._originStyleProp.map(prop => this.el.style[prop]);
this.parentOriginStylePosition = this.el.parentElement.style.position;
const parent = this.el.parentElement;
const dragTransform = Utils.getValuesFromTransformedElement(parent);
this.rectScale = {
x: dragTransform.xScale,
y: dragTransform.yScale
};
if (getComputedStyle(this.el.parentElement).position.match(/static/)) {
this.el.parentElement.style.position = 'relative';
}
this.el.style.position = 'absolute';
this.el.style.opacity = '0.8';
return this;
}
/** @internal */
protected _cleanHelper(): DDResizable {
DDResizable._originStyleProp.forEach((prop, i) => {
this.el.style[prop] = this.elOriginStyleVal[i] || null;
});
this.el.parentElement.style.position = this.parentOriginStylePosition || null;
return this;
}
/** @internal */
protected _getChange(event: MouseEvent, dir: string): Rect {
const oEvent = this.startEvent;
const newRect = { // Note: originalRect is a complex object, not a simple Rect, so copy out.
width: this.originalRect.width,
height: this.originalRect.height + this.scrolled,
left: this.originalRect.left,
top: this.originalRect.top - this.scrolled
};
const offsetX = event.clientX - oEvent.clientX;
const offsetY = this.sizeToContent ? 0 : event.clientY - oEvent.clientY; // prevent vert resize
if (dir.indexOf('e') > -1) {
newRect.width += offsetX;
} else if (dir.indexOf('w') > -1) {
newRect.width -= offsetX;
newRect.left += offsetX;
}
if (dir.indexOf('s') > -1) {
newRect.height += offsetY;
} else if (dir.indexOf('n') > -1) {
newRect.height -= offsetY;
newRect.top += offsetY
}
const constrain = this._constrainSize(newRect.width, newRect.height);
if (Math.round(newRect.width) !== Math.round(constrain.width)) { // round to ignore slight round-off errors
if (dir.indexOf('w') > -1) {
newRect.left += newRect.width - constrain.width;
}
newRect.width = constrain.width;
}
if (Math.round(newRect.height) !== Math.round(constrain.height)) {
if (dir.indexOf('n') > -1) {
newRect.top += newRect.height - constrain.height;
}
newRect.height = constrain.height;
}
return newRect;
}
/** @internal constrain the size to the set min/max values */
protected _constrainSize(oWidth: number, oHeight: number): Size {
const maxWidth = this.option.maxWidth || Number.MAX_SAFE_INTEGER;
const minWidth = this.option.minWidth / this.rectScale.x || oWidth;
const maxHeight = this.option.maxHeight || Number.MAX_SAFE_INTEGER;
const minHeight = this.option.minHeight / this.rectScale.y || oHeight;
const width = Math.min(maxWidth, Math.max(minWidth, oWidth));
const height = Math.min(maxHeight, Math.max(minHeight, oHeight));
return { width, height };
}
/** @internal */
protected _applyChange(): DDResizable {
let containmentRect = { left: 0, top: 0, width: 0, height: 0 };
if (this.el.style.position === 'absolute') {
const containmentEl = this.el.parentElement;
const { left, top } = containmentEl.getBoundingClientRect();
containmentRect = { left, top, width: 0, height: 0 };
}
if (!this.temporalRect) return this;
Object.keys(this.temporalRect).forEach(key => {
const value = this.temporalRect[key];
const scaleReciprocal = key === 'width' || key === 'left' ? this.rectScale.x : key === 'height' || key === 'top' ? this.rectScale.y : 1;
this.el.style[key] = (value - containmentRect[key]) * scaleReciprocal + 'px';
});
return this;
}
/** @internal */
protected _removeHandlers(): DDResizable {
this.handlers.forEach(handle => handle.destroy());
delete this.handlers;
return this;
}
/** @internal */
protected _ui = (): DDUIData => {
const containmentEl = this.el.parentElement;
const containmentRect = containmentEl.getBoundingClientRect();
const newRect = { // Note: originalRect is a complex object, not a simple Rect, so copy out.
width: this.originalRect.width,
height: this.originalRect.height + this.scrolled,
left: this.originalRect.left,
top: this.originalRect.top - this.scrolled
};
const rect = this.temporalRect || newRect;
return {
position: {
left: (rect.left - containmentRect.left) * this.rectScale.x,
top: (rect.top - containmentRect.top) * this.rectScale.y
},
size: {
width: rect.width * this.rectScale.x,
height: rect.height * this.rectScale.y
}
/* Gridstack ONLY needs position set above... keep around in case.
element: [this.el], // The object representing the element to be resized
helper: [], // TODO: not support yet - The object representing the helper that's being resized
originalElement: [this.el],// we don't wrap here, so simplify as this.el //The object representing the original element before it is wrapped
originalPosition: { // The position represented as { left, top } before the resizable is resized
left: this.originalRect.left - containmentRect.left,
top: this.originalRect.top - containmentRect.top
},
originalSize: { // The size represented as { width, height } before the resizable is resized
width: this.originalRect.width,
height: this.originalRect.height
}
*/
};
}
}