import {
toggleClass,
getRect,
index,
closest,
on,
off,
clone,
css,
setRect,
unsetRect,
matrix,
expando
} from '../../src/utils.js';
import dispatchEvent from '../../src/EventDispatcher.js';
let multiDragElements = [],
multiDragClones = [],
lastMultiDragSelect, // for selection with modifier key down (SHIFT)
multiDragSortable,
initialFolding = false, // Initial multi-drag fold when drag started
folding = false, // Folding any other time
dragStarted = false,
dragEl,
clonesFromRect,
clonesHidden;
function MultiDragPlugin() {
function MultiDrag(sortable) {
// Bind all private methods
for (let fn in this) {
if (fn.charAt(0) === '_' && typeof this[fn] === 'function') {
this[fn] = this[fn].bind(this);
}
}
if (sortable.options.supportPointer) {
on(document, 'pointerup', this._deselectMultiDrag);
} else {
on(document, 'mouseup', this._deselectMultiDrag);
on(document, 'touchend', this._deselectMultiDrag);
}
on(document, 'keydown', this._checkKeyDown);
on(document, 'keyup', this._checkKeyUp);
this.defaults = {
selectedClass: 'sortable-selected',
multiDragKey: null,
setData(dataTransfer, dragEl) {
let data = '';
if (multiDragElements.length && multiDragSortable === sortable) {
multiDragElements.forEach((multiDragElement, i) => {
data += (!i ? '' : ', ') + multiDragElement.textContent;
});
} else {
data = dragEl.textContent;
}
dataTransfer.setData('Text', data);
}
};
}
MultiDrag.prototype = {
multiDragKeyDown: false,
isMultiDrag: false,
delayStartGlobal({ dragEl: dragged }) {
dragEl = dragged;
},
delayEnded() {
this.isMultiDrag = ~multiDragElements.indexOf(dragEl);
},
setupClone({ sortable, cancel }) {
if (!this.isMultiDrag) return;
for (let i = 0; i < multiDragElements.length; i++) {
multiDragClones.push(clone(multiDragElements[i]));
multiDragClones[i].sortableIndex = multiDragElements[i].sortableIndex;
multiDragClones[i].draggable = false;
multiDragClones[i].style['will-change'] = '';
toggleClass(multiDragClones[i], this.options.selectedClass, false);
multiDragElements[i] === dragEl && toggleClass(multiDragClones[i], this.options.chosenClass, false);
}
sortable._hideClone();
cancel();
},
clone({ sortable, rootEl, dispatchSortableEvent, cancel }) {
if (!this.isMultiDrag) return;
if (!this.options.removeCloneOnHide) {
if (multiDragElements.length && multiDragSortable === sortable) {
insertMultiDragClones(true, rootEl);
dispatchSortableEvent('clone');
cancel();
}
}
},
showClone({ cloneNowShown, rootEl, cancel }) {
if (!this.isMultiDrag) return;
insertMultiDragClones(false, rootEl);
multiDragClones.forEach(clone => {
css(clone, 'display', '');
});
cloneNowShown();
clonesHidden = false;
cancel();
},
hideClone({ sortable, cloneNowHidden, cancel }) {
if (!this.isMultiDrag) return;
multiDragClones.forEach(clone => {
css(clone, 'display', 'none');
if (this.options.removeCloneOnHide && clone.parentNode) {
clone.parentNode.removeChild(clone);
}
});
cloneNowHidden();
clonesHidden = true;
cancel();
},
dragStartGlobal({ sortable }) {
if (!this.isMultiDrag && multiDragSortable) {
multiDragSortable.multiDrag._deselectMultiDrag();
}
multiDragElements.forEach(multiDragElement => {
multiDragElement.sortableIndex = index(multiDragElement);
});
// Sort multi-drag elements
multiDragElements = multiDragElements.sort(function(a, b) {
return a.sortableIndex - b.sortableIndex;
});
dragStarted = true;
},
dragStarted({ sortable }) {
if (!this.isMultiDrag) return;
if (this.options.sort) {
// Capture rects,
// hide multi drag elements (by positioning them absolute),
// set multi drag elements rects to dragRect,
// show multi drag elements,
// animate to rects,
// unset rects & remove from DOM
sortable.captureAnimationState();
if (this.options.animation) {
multiDragElements.forEach(multiDragElement => {
if (multiDragElement === dragEl) return;
css(multiDragElement, 'position', 'absolute');
});
let dragRect = getRect(dragEl, false, true, true);
multiDragElements.forEach(multiDragElement => {
if (multiDragElement === dragEl) return;
setRect(multiDragElement, dragRect);
});
folding = true;
initialFolding = true;
}
}
sortable.animateAll(() => {
folding = false;
initialFolding = false;
if (this.options.animation) {
multiDragElements.forEach(multiDragElement => {
unsetRect(multiDragElement);
});
}
// Remove all auxiliary multidrag items from el, if sorting enabled
if (this.options.sort) {
removeMultiDragElements();
}
});
},
dragOver({ target, completed, cancel }) {
if (folding && ~multiDragElements.indexOf(target)) {
completed(false);
cancel();
}
},
revert({ fromSortable, rootEl, sortable, dragRect }) {
if (multiDragElements.length > 1) {
// Setup unfold animation
multiDragElements.forEach(multiDragElement => {
sortable.addAnimationState({
target: multiDragElement,
rect: folding ? getRect(multiDragElement) : dragRect
});
unsetRect(multiDragElement);
multiDragElement.fromRect = dragRect;
fromSortable.removeAnimationState(multiDragElement);
});
folding = false;
insertMultiDragElements(!this.options.removeCloneOnHide, rootEl);
}
},
dragOverCompleted({ sortable, isOwner, insertion, activeSortable, parentEl, putSortable }) {
let options = this.options;
if (insertion) {
// Clones must be hidden before folding animation to capture dragRectAbsolute properly
if (isOwner) {
activeSortable._hideClone();
}
initialFolding = false;
// If leaving sort:false root, or already folding - Fold to new location
if (options.animation && multiDragElements.length > 1 && (folding || !isOwner && !activeSortable.options.sort && !putSortable)) {
// Fold: Set all multi drag elements's rects to dragEl's rect when multi-drag elements are invisible
let dragRectAbsolute = getRect(dragEl, false, true, true);
multiDragElements.forEach(multiDragElement => {
if (multiDragElement === dragEl) return;
setRect(multiDragElement, dragRectAbsolute);
// Move element(s) to end of parentEl so that it does not interfere with multi-drag clones insertion if they are inserted
// while folding, and so that we can capture them again because old sortable will no longer be fromSortable
parentEl.appendChild(multiDragElement);
});
folding = true;
}
// Clones must be shown (and check to remove multi drags) after folding when interfering multiDragElements are moved out
if (!isOwner) {
// Only remove if not folding (folding will remove them anyways)
if (!folding) {
removeMultiDragElements();
}
if (multiDragElements.length > 1) {
let clonesHiddenBefore = clonesHidden;
activeSortable._showClone(sortable);
// Unfold animation for clones if showing from hidden
if (activeSortable.options.animation && !clonesHidden && clonesHiddenBefore) {
multiDragClones.forEach(clone => {
activeSortable.addAnimationState({
target: clone,
rect: clonesFromRect
});
clone.fromRect = clonesFromRect;
clone.thisAnimationDuration = null;
});
}
} else {
activeSortable._showClone(sortable);
}
}
}
},
dragOverAnimationCapture({ dragRect, isOwner, activeSortable }) {
multiDragElements.forEach(multiDragElement => {
multiDragElement.thisAnimationDuration = null;
});
if (activeSortable.options.animation && !isOwner && activeSortable.multiDrag.isMultiDrag) {
clonesFromRect = Object.assign({}, dragRect);
let dragMatrix = matrix(dragEl, true);
clonesFromRect.top -= dragMatrix.f;
clonesFromRect.left -= dragMatrix.e;
}
},
dragOverAnimationComplete() {
if (folding) {
folding = false;
removeMultiDragElements();
}
},
drop({ originalEvent: evt, rootEl, parentEl, sortable, dispatchSortableEvent, oldIndex, putSortable }) {
let toSortable = (putSortable || this.sortable);
if (!evt) return;
let options = this.options,
children = parentEl.children;
// Multi-drag selection
if (!dragStarted) {
if (options.multiDragKey && !this.multiDragKeyDown) {
this._deselectMultiDrag();
}
toggleClass(dragEl, options.selectedClass, !~multiDragElements.indexOf(dragEl));
if (!~multiDragElements.indexOf(dragEl)) {
multiDragElements.push(dragEl);
dispatchEvent({
sortable,
rootEl,
name: 'select',
targetEl: dragEl,
originalEvt: evt
});
// Modifier activated, select from last to dragEl
if (evt.shiftKey && lastMultiDragSelect && sortable.el.contains(lastMultiDragSelect)) {
let lastIndex = index(lastMultiDragSelect),
currentIndex = index(dragEl);
if (~lastIndex && ~currentIndex && lastIndex !== currentIndex) {
// Must include lastMultiDragSelect (select it), in case modified selection from no selection
// (but previous selection existed)
let n, i;
if (currentIndex > lastIndex) {
i = lastIndex;
n = currentIndex;
} else {
i = currentIndex;
n = lastIndex + 1;
}
for (; i < n; i++) {
if (~multiDragElements.indexOf(children[i])) continue;
toggleClass(children[i], options.selectedClass, true);
multiDragElements.push(children[i]);
dispatchEvent({
sortable,
rootEl,
name: 'select',
targetEl: children[i],
originalEvt: evt
});
}
}
} else {
lastMultiDragSelect = dragEl;
}
multiDragSortable = toSortable;
} else {
multiDragElements.splice(multiDragElements.indexOf(dragEl), 1);
lastMultiDragSelect = null;
dispatchEvent({
sortable,
rootEl,
name: 'deselect',
targetEl: dragEl,
originalEvt: evt
});
}
}
// Multi-drag drop
if (dragStarted && this.isMultiDrag) {
folding = false;
// Do not "unfold" after around dragEl if reverted
if ((parentEl[expando].options.sort || parentEl !== rootEl) && multiDragElements.length > 1) {
let dragRect = getRect(dragEl),
multiDragIndex = index(dragEl, ':not(.' + this.options.selectedClass + ')');
if (!initialFolding && options.animation) dragEl.thisAnimationDuration = null;
toSortable.captureAnimationState();
if (!initialFolding) {
if (options.animation) {
dragEl.fromRect = dragRect;
multiDragElements.forEach(multiDragElement => {
multiDragElement.thisAnimationDuration = null;
if (multiDragElement !== dragEl) {
let rect = folding ? getRect(multiDragElement) : dragRect;
multiDragElement.fromRect = rect;
// Prepare unfold animation
toSortable.addAnimationState({
target: multiDragElement,
rect: rect
});
}
});
}
// Multi drag elements are not necessarily removed from the DOM on drop, so to reinsert
// properly they must all be removed
removeMultiDragElements();
multiDragElements.forEach(multiDragElement => {
if (children[multiDragIndex]) {
parentEl.insertBefore(multiDragElement, children[multiDragIndex]);
} else {
parentEl.appendChild(multiDragElement);
}
multiDragIndex++;
});
// If initial folding is done, the elements may have changed position because they are now
// unfolding around dragEl, even though dragEl may not have his index changed, so update event
// must be fired here as Sortable will not.
if (oldIndex === index(dragEl)) {
let update = false;
multiDragElements.forEach(multiDragElement => {
if (multiDragElement.sortableIndex !== index(multiDragElement)) {
update = true;
return;
}
});
if (update) {
dispatchSortableEvent('update');
}
}
}
// Must be done after capturing individual rects (scroll bar)
multiDragElements.forEach(multiDragElement => {
unsetRect(multiDragElement);
});
toSortable.animateAll();
}
multiDragSortable = toSortable;
}
// Remove clones if necessary
if (rootEl === parentEl || (putSortable && putSortable.lastPutMode !== 'clone')) {
multiDragClones.forEach(clone => {
clone.parentNode && clone.parentNode.removeChild(clone);
});
}
},
nullingGlobal() {
this.isMultiDrag =
dragStarted = false;
multiDragClones.length = 0;
},
destroyGlobal() {
this._deselectMultiDrag();
off(document, 'pointerup', this._deselectMultiDrag);
off(document, 'mouseup', this._deselectMultiDrag);
off(document, 'touchend', this._deselectMultiDrag);
off(document, 'keydown', this._checkKeyDown);
off(document, 'keyup', this._checkKeyUp);
},
_deselectMultiDrag(evt) {
if (typeof dragStarted !== "undefined" && dragStarted) return;
// Only deselect if selection is in this sortable
if (multiDragSortable !== this.sortable) return;
// Only deselect if target is not item in this sortable
if (evt && closest(evt.target, this.options.draggable, this.sortable.el, false)) return;
// Only deselect if left click
if (evt && evt.button !== 0) return;
while (multiDragElements.length) {
let el = multiDragElements[0];
toggleClass(el, this.options.selectedClass, false);
multiDragElements.shift();
dispatchEvent({
sortable: this.sortable,
rootEl: this.sortable.el,
name: 'deselect',
targetEl: el,
originalEvt: evt
});
}
},
_checkKeyDown(evt) {
if (evt.key === this.options.multiDragKey) {
this.multiDragKeyDown = true;
}
},
_checkKeyUp(evt) {
if (evt.key === this.options.multiDragKey) {
this.multiDragKeyDown = false;
}
}
};
return Object.assign(MultiDrag, {
// Static methods & properties
pluginName: 'multiDrag',
utils: {
/**
* Selects the provided multi-drag item
* @param {HTMLElement} el The element to be selected
*/
select(el) {
let sortable = el.parentNode[expando];
if (!sortable || !sortable.options.multiDrag || ~multiDragElements.indexOf(el)) return;
if (multiDragSortable && multiDragSortable !== sortable) {
multiDragSortable.multiDrag._deselectMultiDrag();
multiDragSortable = sortable;
}
toggleClass(el, sortable.options.selectedClass, true);
multiDragElements.push(el);
},
/**
* Deselects the provided multi-drag item
* @param {HTMLElement} el The element to be deselected
*/
deselect(el) {
let sortable = el.parentNode[expando],
index = multiDragElements.indexOf(el);
if (!sortable || !sortable.options.multiDrag || !~index) return;
toggleClass(el, sortable.options.selectedClass, false);
multiDragElements.splice(index, 1);
}
},
eventProperties() {
const oldIndicies = [],
newIndicies = [];
multiDragElements.forEach(multiDragElement => {
oldIndicies.push({
multiDragElement,
index: multiDragElement.sortableIndex
});
// multiDragElements will already be sorted if folding
let newIndex;
if (folding && multiDragElement !== dragEl) {
newIndex = -1;
} else if (folding) {
newIndex = index(multiDragElement, ':not(.' + this.options.selectedClass + ')');
} else {
newIndex = index(multiDragElement);
}
newIndicies.push({
multiDragElement,
index: newIndex
});
});
return {
items: [...multiDragElements],
clones: [...multiDragClones],
oldIndicies,
newIndicies
};
},
optionListeners: {
multiDragKey(key) {
key = key.toLowerCase();
if (key === 'ctrl') {
key = 'Control';
} else if (key.length > 1) {
key = key.charAt(0).toUpperCase() + key.substr(1);
}
return key;
}
}
});
}
function insertMultiDragElements(clonesInserted, rootEl) {
multiDragElements.forEach((multiDragElement, i) => {
let target = rootEl.children[multiDragElement.sortableIndex + (clonesInserted ? Number(i) : 0)];
if (target) {
rootEl.insertBefore(multiDragElement, target);
} else {
rootEl.appendChild(multiDragElement);
}
});
}
/**
* Insert multi-drag clones
* @param {[Boolean]} elementsInserted Whether the multi-drag elements are inserted
* @param {HTMLElement} rootEl
*/
function insertMultiDragClones(elementsInserted, rootEl) {
multiDragClones.forEach((clone, i) => {
let target = rootEl.children[clone.sortableIndex + (elementsInserted ? Number(i) : 0)];
if (target) {
rootEl.insertBefore(clone, target);
} else {
rootEl.appendChild(clone);
}
});
}
function removeMultiDragElements() {
multiDragElements.forEach(multiDragElement => {
if (multiDragElement === dragEl) return;
multiDragElement.parentNode && multiDragElement.parentNode.removeChild(multiDragElement);
});
}
export default MultiDragPlugin;