devextreme
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HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (ui/list/ui.list.edit.decorator.switchable.js)
* Version: 18.1.3
* Build date: Tue May 15 2018
*
* Copyright (c) 2012 - 2018 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
"use strict";
var $ = require("../../core/renderer"),
eventsEngine = require("../../events/core/events_engine"),
noop = require("../../core/utils/common").noop,
EditDecorator = require("./ui.list.edit.decorator"),
abstract = EditDecorator.abstract,
eventUtils = require("../../events/utils"),
pointerEvents = require("../../events/pointer"),
feedbackEvents = require("../../events/core/emitter.feedback");
var LIST_EDIT_DECORATOR = "dxListEditDecorator",
POINTER_DOWN_EVENT_NAME = eventUtils.addNamespace(pointerEvents.down, LIST_EDIT_DECORATOR),
ACTIVE_EVENT_NAME = eventUtils.addNamespace(feedbackEvents.active, LIST_EDIT_DECORATOR),
LIST_ITEM_CONTENT_CLASS = "dx-list-item-content",
SWITCHABLE_DELETE_READY_CLASS = "dx-list-switchable-delete-ready",
SWITCHABLE_MENU_SHIELD_POSITIONING_CLASS = "dx-list-switchable-menu-shield-positioning",
SWITCHABLE_DELETE_TOP_SHIELD_CLASS = "dx-list-switchable-delete-top-shield",
SWITCHABLE_DELETE_BOTTOM_SHIELD_CLASS = "dx-list-switchable-delete-bottom-shield",
SWITCHABLE_MENU_ITEM_SHIELD_POSITIONING_CLASS = "dx-list-switchable-menu-item-shield-positioning",
SWITCHABLE_DELETE_ITEM_CONTENT_SHIELD_CLASS = "dx-list-switchable-delete-item-content-shield";
var SwitchableEditDecorator = EditDecorator.inherit({
_init: function() {
this._$topShield = $("<div>").addClass(SWITCHABLE_DELETE_TOP_SHIELD_CLASS);
this._$bottomShield = $("<div>").addClass(SWITCHABLE_DELETE_BOTTOM_SHIELD_CLASS);
this._$itemContentShield = $("<div>").addClass(SWITCHABLE_DELETE_ITEM_CONTENT_SHIELD_CLASS);
eventsEngine.on(this._$topShield, POINTER_DOWN_EVENT_NAME, this._cancelDeleteReadyItem.bind(this));
eventsEngine.on(this._$bottomShield, POINTER_DOWN_EVENT_NAME, this._cancelDeleteReadyItem.bind(this));
this._list.$element().append(this._$topShield.toggle(false)).append(this._$bottomShield.toggle(false))
},
handleClick: function() {
return this._cancelDeleteReadyItem()
},
_cancelDeleteReadyItem: function() {
if (!this._$readyToDeleteItem) {
return false
}
this._cancelDelete(this._$readyToDeleteItem);
return true
},
_cancelDelete: function($itemElement) {
this._toggleDeleteReady($itemElement, false)
},
_toggleDeleteReady: function($itemElement, readyToDelete) {
if (void 0 === readyToDelete) {
readyToDelete = !this._isReadyToDelete($itemElement)
}
this._toggleShields($itemElement, readyToDelete);
this._toggleScrolling(readyToDelete);
this._cacheReadyToDeleteItem($itemElement, readyToDelete);
this._animateToggleDelete($itemElement, readyToDelete)
},
_isReadyToDelete: function($itemElement) {
return $itemElement.hasClass(SWITCHABLE_DELETE_READY_CLASS)
},
_toggleShields: function($itemElement, enabled) {
this._list.$element().toggleClass(SWITCHABLE_MENU_SHIELD_POSITIONING_CLASS, enabled);
this._$topShield.toggle(enabled);
this._$bottomShield.toggle(enabled);
if (enabled) {
this._updateShieldsHeight($itemElement)
}
this._toggleContentShield($itemElement, enabled)
},
_updateShieldsHeight: function($itemElement) {
var $list = this._list.$element(),
listTopOffset = $list.offset().top,
listHeight = $list.outerHeight(),
itemTopOffset = $itemElement.offset().top,
itemHeight = $itemElement.outerHeight(),
dirtyTopShieldHeight = itemTopOffset - listTopOffset,
dirtyBottomShieldHeight = listHeight - itemHeight - dirtyTopShieldHeight;
this._$topShield.height(Math.max(dirtyTopShieldHeight, 0));
this._$bottomShield.height(Math.max(dirtyBottomShieldHeight, 0))
},
_toggleContentShield: function($itemElement, enabled) {
if (enabled) {
$itemElement.find("." + LIST_ITEM_CONTENT_CLASS).first().append(this._$itemContentShield)
} else {
this._$itemContentShield.detach()
}
},
_toggleScrolling: function(readyToDelete) {
var scrollView = this._list.$element().dxScrollView("instance");
if (readyToDelete) {
scrollView.on("start", this._cancelScrolling)
} else {
scrollView.off("start", this._cancelScrolling)
}
},
_cancelScrolling: function(args) {
args.event.cancel = true
},
_cacheReadyToDeleteItem: function($itemElement, cache) {
if (cache) {
this._$readyToDeleteItem = $itemElement
} else {
delete this._$readyToDeleteItem
}
},
_animateToggleDelete: function($itemElement, readyToDelete) {
if (readyToDelete) {
this._enablePositioning($itemElement);
this._prepareDeleteReady($itemElement);
this._animatePrepareDeleteReady($itemElement)
} else {
this._forgetDeleteReady($itemElement);
this._animateForgetDeleteReady($itemElement).done(this._disablePositioning.bind(this, $itemElement))
}
},
_enablePositioning: function($itemElement) {
$itemElement.addClass(SWITCHABLE_MENU_ITEM_SHIELD_POSITIONING_CLASS);
eventsEngine.on($itemElement, ACTIVE_EVENT_NAME, noop)
},
_disablePositioning: function($itemElement) {
$itemElement.removeClass(SWITCHABLE_MENU_ITEM_SHIELD_POSITIONING_CLASS);
eventsEngine.off($itemElement, ACTIVE_EVENT_NAME)
},
_prepareDeleteReady: function($itemElement) {
$itemElement.addClass(SWITCHABLE_DELETE_READY_CLASS)
},
_forgetDeleteReady: function($itemElement) {
$itemElement.removeClass(SWITCHABLE_DELETE_READY_CLASS)
},
_animatePrepareDeleteReady: abstract,
_animateForgetDeleteReady: abstract,
_deleteItem: function($itemElement) {
$itemElement = $itemElement || this._$readyToDeleteItem;
if ($itemElement.is(".dx-state-disabled, .dx-state-disabled *")) {
return
}
this._list.deleteItem($itemElement).always(this._cancelDelete.bind(this, $itemElement))
},
_isRtlEnabled: function() {
return this._list.option("rtlEnabled")
},
dispose: function() {
if (this._$topShield) {
this._$topShield.remove()
}
if (this._$bottomShield) {
this._$bottomShield.remove()
}
this.callBase.apply(this, arguments)
}
});
module.exports = SwitchableEditDecorator;