react-native/Libraries/Experimental/SwipeableRow/SwipeableListViewDataSource.js

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/**
* Copyright (c) 2015-present, Facebook, Inc.
* All rights reserved.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*
* @providesModule SwipeableListViewDataSource
*/
'use strict';
const ListViewDataSource = require('ListViewDataSource');
/**
* Data source wrapper around ListViewDataSource to allow for tracking of
* which row is swiped open and close opened row(s) when another row is swiped
* open.
*
* See https://github.com/facebook/react-native/pull/5602 for why
* ListViewDataSource is not subclassed.
*/
class SwipeableListViewDataSource {
_previousOpenRowID: string;
_openRowID: string;
_dataBlob: any;
_dataSource: ListViewDataSource;
rowIdentities: Array<Array<string>>;
sectionIdentities: Array<string>;
constructor(params: Object) {
this._dataSource = new ListViewDataSource({
getRowData: params.getRowData,
getSectionHeaderData: params.getSectionHeaderData,
rowHasChanged: (row1, row2) => {
/**
* Row needs to be re-rendered if its swiped open/close status is
* changed, or its data blob changed.
*/
return (
(row1.id !== this._previousOpenRowID && row2.id === this._openRowID) ||
(row1.id === this._previousOpenRowID && row2.id !== this._openRowID) ||
params.rowHasChanged(row1, row2)
);
},
sectionHeaderHasChanged: params.sectionHeaderHasChanged,
});
}
cloneWithRowsAndSections(
dataBlob: any,
sectionIdentities: ?Array<string>,
rowIdentities: ?Array<Array<string>>
): SwipeableListViewDataSource {
this._dataSource = this._dataSource.cloneWithRowsAndSections(
dataBlob,
sectionIdentities,
rowIdentities
);
this._dataBlob = dataBlob;
this.rowIdentities = this._dataSource.rowIdentities;
this.sectionIdentities = this._dataSource.sectionIdentities;
return this;
}
// For the actual ListView to use
getDataSource(): ListViewDataSource {
return this._dataSource;
}
getOpenRowID(): ?string {
return this._openRowID;
}
getFirstRowID(): ?string {
/**
* If rowIdentities is specified, find the first data row from there since
* we don't want to attempt to bounce section headers. If unspecified, find
* the first data row from _dataBlob.
*/
if (this.rowIdentities) {
return this.rowIdentities[0] && this.rowIdentities[0][0];
}
return Object.keys(this._dataBlob)[0];
}
setOpenRowID(rowID: string): SwipeableListViewDataSource {
this._previousOpenRowID = this._openRowID;
this._openRowID = rowID;
this._dataSource = this._dataSource.cloneWithRowsAndSections(
this._dataBlob,
this.sectionIdentities,
this.rowIdentities
);
return this;
}
}
module.exports = SwipeableListViewDataSource;