devextreme
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HTML5 JavaScript Component Suite for Responsive Web Development
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JavaScript
/**
* DevExtreme (ui/selection/selection.strategy.deferred.js)
* Version: 18.2.18
* Build date: Tue Oct 18 2022
*
* Copyright (c) 2012 - 2022 Developer Express Inc. ALL RIGHTS RESERVED
* Read about DevExtreme licensing here: https://js.devexpress.com/Licensing/
*/
"use strict";
var typeUtils = require("../../core/utils/type"),
SelectionStrategy = require("./selection.strategy"),
errors = require("../widget/ui.errors"),
dataQuery = require("../../data/query"),
Deferred = require("../../core/utils/deferred").Deferred;
module.exports = SelectionStrategy.inherit({
getSelectedItems: function() {
return this._loadFilteredData(this.options.selectionFilter)
},
getSelectedItemKeys: function() {
var d = new Deferred,
that = this,
key = this.options.key(),
select = typeUtils.isString(key) ? [key] : key;
this._loadFilteredData(this.options.selectionFilter, null, select).done(function(items) {
var keys = items.map(function(item) {
return that.options.keyOf(item)
});
d.resolve(keys)
}).fail(d.reject);
return d.promise()
},
selectedItemKeys: function(keys, preserve, isDeselect, isSelectAll) {
if (isSelectAll) {
var filter = this.options.filter();
if (!filter) {
this._setOption("selectionFilter", isDeselect ? [] : null)
} else {
this._addSelectionFilter(isDeselect, filter, isSelectAll)
}
} else {
if (!preserve) {
this._setOption("selectionFilter", [])
}
for (var i = 0; i < keys.length; i++) {
if (isDeselect) {
this.removeSelectedItem(keys[i])
} else {
this.addSelectedItem(keys[i])
}
}
}
this.onSelectionChanged();
return (new Deferred).resolve()
},
setSelectedItems: function(keys) {
this._setOption("selectionFilter", null);
for (var i = 0; i < keys.length; i++) {
this.addSelectedItem(keys[i])
}
},
isItemDataSelected: function(itemData) {
return this.isItemKeySelected(itemData)
},
isItemKeySelected: function(itemData) {
var selectionFilter = this.options.selectionFilter;
if (!selectionFilter) {
return true
}
return !!dataQuery([itemData]).filter(selectionFilter).toArray().length
},
_processSelectedItem: function(key) {
var keyField = this.options.key(),
filter = [keyField, "=", key];
if (Array.isArray(keyField)) {
filter = [];
for (var i = 0; i < keyField.length; i++) {
filter.push([keyField[i], "=", key[keyField[i]]]);
if (i !== keyField.length - 1) {
filter.push("and")
}
}
}
return filter
},
addSelectedItem: function(key) {
var filter = this._processSelectedItem(key);
this._addSelectionFilter(false, filter)
},
removeSelectedItem: function(key) {
var filter = this._processSelectedItem(key);
this._addSelectionFilter(true, filter)
},
validate: function() {
var key = this.options.key;
if (key && void 0 === key()) {
throw errors.Error("E1042", "Deferred selection")
}
},
_findSubFilter: function(selectionFilter, filter) {
if (!selectionFilter) {
return -1
}
var filterString = JSON.stringify(filter);
for (var index = 0; index < selectionFilter.length; index++) {
var subFilter = selectionFilter[index];
if (subFilter && JSON.stringify(subFilter) === filterString) {
return index
}
}
return -1
},
_isLastSubFilter: function(selectionFilter, filter) {
if (selectionFilter && filter) {
return this._findSubFilter(selectionFilter, filter) === selectionFilter.length - 1 || 0 === this._findSubFilter([selectionFilter], filter)
}
return false
},
_addFilterOperator: function(selectionFilter, filterOperator) {
if (selectionFilter.length > 1 && typeUtils.isString(selectionFilter[1]) && selectionFilter[1] !== filterOperator) {
selectionFilter = [selectionFilter]
}
if (selectionFilter.length) {
selectionFilter.push(filterOperator)
}
return selectionFilter
},
_denormalizeFilter: function(filter) {
if (filter && typeUtils.isString(filter[0])) {
filter = [filter]
}
return filter
},
_addSelectionFilter: function(isDeselect, filter, isSelectAll) {
var that = this,
needAddFilter = true,
currentFilter = isDeselect ? ["!", filter] : filter,
currentOperation = isDeselect ? "and" : "or",
selectionFilter = that.options.selectionFilter || [];
selectionFilter = that._denormalizeFilter(selectionFilter);
if (selectionFilter && selectionFilter.length) {
that._removeSameFilter(selectionFilter, filter, isDeselect, isSelectAll);
var lastOperation = that._removeSameFilter(selectionFilter, filter, !isDeselect);
if (lastOperation && ("or" !== lastOperation && isDeselect || "and" !== lastOperation && !isDeselect)) {
needAddFilter = false;
selectionFilter = []
}
if (needAddFilter) {
selectionFilter = that._addFilterOperator(selectionFilter, currentOperation)
}
}
if (needAddFilter) {
selectionFilter.push(currentFilter)
}
selectionFilter = that._normalizeFilter(selectionFilter);
that._setOption("selectionFilter", !isDeselect && !selectionFilter.length ? null : selectionFilter)
},
_normalizeFilter: function(filter) {
if (filter && 1 === filter.length) {
filter = filter[0]
}
return filter
},
_removeFilterByIndex: function(filter, filterIndex, isSelectAll) {
var lastRemoveOperation;
if (filterIndex > 0) {
lastRemoveOperation = filter.splice(filterIndex - 1, 2)[0]
} else {
lastRemoveOperation = filter.splice(filterIndex, 2)[1] || "undefined"
}
if (isSelectAll && "and" === lastRemoveOperation) {
filter.splice(0, filter.length)
}
return lastRemoveOperation
},
_removeSameFilter: function(selectionFilter, filter, inverted, isSelectAll) {
filter = inverted ? ["!", filter] : filter;
var filterIndex = this._findSubFilter(selectionFilter, filter);
if (JSON.stringify(filter) === JSON.stringify(selectionFilter)) {
selectionFilter.splice(0, selectionFilter.length);
return "undefined"
}
if (filterIndex >= 0) {
return this._removeFilterByIndex(selectionFilter, filterIndex, isSelectAll)
} else {
for (var i = 0; i < selectionFilter.length; i++) {
var lastRemoveOperation = Array.isArray(selectionFilter[i]) && selectionFilter[i].length > 2 && this._removeSameFilter(selectionFilter[i], filter, false, isSelectAll);
if (lastRemoveOperation) {
if (!selectionFilter[i].length) {
this._removeFilterByIndex(selectionFilter, i, isSelectAll)
} else {
if (1 === selectionFilter[i].length) {
selectionFilter[i] = selectionFilter[i][0]
}
}
return lastRemoveOperation
}
}
}
},
getSelectAllState: function() {
var filter = this.options.filter(),
selectionFilter = this.options.selectionFilter;
if (!selectionFilter) {
return true
}
if (!selectionFilter.length) {
return false
}
if (!filter || !filter.length) {
return
}
selectionFilter = this._denormalizeFilter(selectionFilter);
if (this._isLastSubFilter(selectionFilter, filter)) {
return true
}
if (this._isLastSubFilter(selectionFilter, ["!", filter])) {
return false
}
return
}
});