gridstack
Version:
TypeScript/JS lib for dashboard layout and creation, no external dependencies, with many wrappers (React, Angular, Vue, Ember, knockout...)
199 lines • 9.14 kB
JavaScript
"use strict";
/**
* dd-droppable.ts 5.0
* Copyright (c) 2021 Alain Dumesny - see GridStack root license
*/
var __extends = (this && this.__extends) || (function () {
var extendStatics = function (d, b) {
extendStatics = Object.setPrototypeOf ||
({ __proto__: [] } instanceof Array && function (d, b) { d.__proto__ = b; }) ||
function (d, b) { for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p]; };
return extendStatics(d, b);
};
return function (d, b) {
extendStatics(d, b);
function __() { this.constructor = d; }
d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
})();
var __assign = (this && this.__assign) || function () {
__assign = Object.assign || function(t) {
for (var s, i = 1, n = arguments.length; i < n; i++) {
s = arguments[i];
for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
t[p] = s[p];
}
return t;
};
return __assign.apply(this, arguments);
};
Object.defineProperty(exports, "__esModule", { value: true });
exports.DDDroppable = void 0;
var dd_manager_1 = require("./dd-manager");
var dd_base_impl_1 = require("./dd-base-impl");
var dd_utils_1 = require("./dd-utils");
// TEST let count = 0;
var DDDroppable = /** @class */ (function (_super) {
__extends(DDDroppable, _super);
function DDDroppable(el, opts) {
if (opts === void 0) { opts = {}; }
var _this = _super.call(this) || this;
_this.el = el;
_this.option = opts;
// create var event binding so we can easily remove and still look like TS methods (unlike anonymous functions)
_this._dragEnter = _this._dragEnter.bind(_this);
_this._dragOver = _this._dragOver.bind(_this);
_this._dragLeave = _this._dragLeave.bind(_this);
_this._drop = _this._drop.bind(_this);
_this.el.classList.add('ui-droppable');
_this.el.addEventListener('dragenter', _this._dragEnter);
_this._setupAccept();
return _this;
}
DDDroppable.prototype.on = function (event, callback) {
_super.prototype.on.call(this, event, callback);
};
DDDroppable.prototype.off = function (event) {
_super.prototype.off.call(this, event);
};
DDDroppable.prototype.enable = function () {
if (!this.disabled)
return;
_super.prototype.enable.call(this);
this.el.classList.remove('ui-droppable-disabled');
this.el.addEventListener('dragenter', this._dragEnter);
};
DDDroppable.prototype.disable = function (forDestroy) {
if (forDestroy === void 0) { forDestroy = false; }
if (this.disabled)
return;
_super.prototype.disable.call(this);
if (!forDestroy)
this.el.classList.add('ui-droppable-disabled');
this.el.removeEventListener('dragenter', this._dragEnter);
};
DDDroppable.prototype.destroy = function () {
this._removeLeaveCallbacks();
this.disable(true);
this.el.classList.remove('ui-droppable');
this.el.classList.remove('ui-droppable-disabled');
_super.prototype.destroy.call(this);
};
DDDroppable.prototype.updateOption = function (opts) {
var _this = this;
Object.keys(opts).forEach(function (key) { return _this.option[key] = opts[key]; });
this._setupAccept();
return this;
};
/** @internal called when the cursor enters our area - prepare for a possible drop and track leaving */
DDDroppable.prototype._dragEnter = function (event) {
// TEST console.log(`${count++} Enter ${(this.el as GridHTMLElement).gridstack.opts.id}`);
if (!this._canDrop())
return;
event.preventDefault();
event.stopPropagation();
// ignore multiple 'dragenter' as we go over existing items
if (this.moving)
return;
this.moving = true;
var ev = dd_utils_1.DDUtils.initEvent(event, { target: this.el, type: 'dropover' });
if (this.option.over) {
this.option.over(ev, this._ui(dd_manager_1.DDManager.dragElement));
}
this.triggerEvent('dropover', ev);
this.el.addEventListener('dragover', this._dragOver);
this.el.addEventListener('drop', this._drop);
this.el.addEventListener('dragleave', this._dragLeave);
// Update: removed that as it causes nested grids to no receive dragenter events when parent drags and sets this for #992. not seeing cursor flicker (chrome).
// this.el.classList.add('ui-droppable-over');
// make sure when we enter this, that the last one gets a leave to correctly cleanup as we don't always do
if (DDDroppable.lastActive && DDDroppable.lastActive !== this) {
DDDroppable.lastActive._dragLeave(event, true);
}
DDDroppable.lastActive = this;
};
/** @internal called when an moving to drop item is being dragged over - do nothing but eat the event */
DDDroppable.prototype._dragOver = function (event) {
event.preventDefault();
event.stopPropagation();
};
/** @internal called when the item is leaving our area, stop tracking if we had moving item */
DDDroppable.prototype._dragLeave = function (event, forceLeave) {
var _a;
// TEST console.log(`${count++} Leave ${(this.el as GridHTMLElement).gridstack.opts.id}`);
event.preventDefault();
event.stopPropagation();
// ignore leave events on our children (we get them when starting to drag our items)
// but exclude nested grids since we would still be leaving ourself,
// but don't handle leave if we're dragging a nested grid around
if (!forceLeave) {
var onChild = dd_utils_1.DDUtils.inside(event, this.el);
var drag = dd_manager_1.DDManager.dragElement.el;
if (onChild && !((_a = drag.gridstackNode) === null || _a === void 0 ? void 0 : _a.subGrid)) { // dragging a nested grid ?
var nestedEl = this.el.gridstack.engine.nodes.filter(function (n) { return n.subGrid; }).map(function (n) { return n.subGrid.el; });
onChild = !nestedEl.some(function (el) { return dd_utils_1.DDUtils.inside(event, el); });
}
if (onChild)
return;
}
if (this.moving) {
var ev = dd_utils_1.DDUtils.initEvent(event, { target: this.el, type: 'dropout' });
if (this.option.out) {
this.option.out(ev, this._ui(dd_manager_1.DDManager.dragElement));
}
this.triggerEvent('dropout', ev);
}
this._removeLeaveCallbacks();
if (DDDroppable.lastActive === this) {
delete DDDroppable.lastActive;
}
};
/** @internal item is being dropped on us - call the client drop event */
DDDroppable.prototype._drop = function (event) {
if (!this.moving)
return; // should not have received event...
event.preventDefault();
var ev = dd_utils_1.DDUtils.initEvent(event, { target: this.el, type: 'drop' });
if (this.option.drop) {
this.option.drop(ev, this._ui(dd_manager_1.DDManager.dragElement));
}
this.triggerEvent('drop', ev);
this._removeLeaveCallbacks();
};
/** @internal called to remove callbacks when leaving or dropping */
DDDroppable.prototype._removeLeaveCallbacks = function () {
if (!this.moving) {
return;
}
delete this.moving;
this.el.removeEventListener('dragover', this._dragOver);
this.el.removeEventListener('drop', this._drop);
this.el.removeEventListener('dragleave', this._dragLeave);
// Update: removed that as it causes nested grids to no receive dragenter events when parent drags and sets this for #992. not seeing cursor flicker (chrome).
// this.el.classList.remove('ui-droppable-over');
};
/** @internal */
DDDroppable.prototype._canDrop = function () {
return dd_manager_1.DDManager.dragElement && (!this.accept || this.accept(dd_manager_1.DDManager.dragElement.el));
};
/** @internal */
DDDroppable.prototype._setupAccept = function () {
var _this = this;
if (this.option.accept && typeof this.option.accept === 'string') {
this.accept = function (el) {
return el.matches(_this.option.accept);
};
}
else {
this.accept = this.option.accept;
}
return this;
};
/** @internal */
DDDroppable.prototype._ui = function (drag) {
return __assign({ draggable: drag.el }, drag.ui());
};
return DDDroppable;
}(dd_base_impl_1.DDBaseImplement));
exports.DDDroppable = DDDroppable;
//# sourceMappingURL=dd-droppable.js.map