579 lines
17 KiB
JavaScript
579 lines
17 KiB
JavaScript
|
/**
|
||
|
|
* Copyright (c) Facebook, Inc. and its affiliates.
|
||
|
|
*
|
||
|
|
* This source code is licensed under the MIT license found in the
|
||
|
|
* LICENSE file in the root directory of this source tree.
|
||
|
|
*
|
||
|
|
* @flow
|
||
|
|
* @format
|
||
|
|
*/
|
||
|
|
|
||
|
|
'use strict';
|
||
|
|
|
||
|
|
const React = require('react');
|
||
|
|
const View = require('../Components/View/View');
|
||
|
|
const VirtualizedList = require('./VirtualizedList');
|
||
|
|
|
||
|
|
const invariant = require('invariant');
|
||
|
|
|
||
|
|
import type {ViewToken} from './ViewabilityHelper';
|
||
|
|
|
||
|
|
type Item = any;
|
||
|
|
|
||
|
|
export type SectionBase<SectionItemT> = {
|
||
|
|
/**
|
||
|
|
* The data for rendering items in this section.
|
||
|
|
*/
|
||
|
|
data: $ReadOnlyArray<SectionItemT>,
|
||
|
|
/**
|
||
|
|
* Optional key to keep track of section re-ordering. If you don't plan on re-ordering sections,
|
||
|
|
* the array index will be used by default.
|
||
|
|
*/
|
||
|
|
key?: string,
|
||
|
|
// Optional props will override list-wide props just for this section.
|
||
|
|
renderItem?: ?(info: {
|
||
|
|
item: SectionItemT,
|
||
|
|
index: number,
|
||
|
|
section: SectionBase<SectionItemT>,
|
||
|
|
separators: {
|
||
|
|
highlight: () => void,
|
||
|
|
unhighlight: () => void,
|
||
|
|
updateProps: (select: 'leading' | 'trailing', newProps: Object) => void,
|
||
|
|
...
|
||
|
|
},
|
||
|
|
...
|
||
|
|
}) => null | React.Element<any>,
|
||
|
|
ItemSeparatorComponent?: ?React.ComponentType<any>,
|
||
|
|
keyExtractor?: (item: SectionItemT, index?: ?number) => string,
|
||
|
|
...
|
||
|
|
};
|
||
|
|
|
||
|
|
type RequiredProps<SectionT: SectionBase<any>> = {|
|
||
|
|
sections: $ReadOnlyArray<SectionT>,
|
||
|
|
|};
|
||
|
|
|
||
|
|
type OptionalProps<SectionT: SectionBase<any>> = {|
|
||
|
|
/**
|
||
|
|
* Default renderer for every item in every section.
|
||
|
|
*/
|
||
|
|
renderItem?: (info: {
|
||
|
|
item: Item,
|
||
|
|
index: number,
|
||
|
|
section: SectionT,
|
||
|
|
separators: {
|
||
|
|
highlight: () => void,
|
||
|
|
unhighlight: () => void,
|
||
|
|
updateProps: (select: 'leading' | 'trailing', newProps: Object) => void,
|
||
|
|
...
|
||
|
|
},
|
||
|
|
...
|
||
|
|
}) => null | React.Element<any>,
|
||
|
|
/**
|
||
|
|
* Rendered at the top of each section. These stick to the top of the `ScrollView` by default on
|
||
|
|
* iOS. See `stickySectionHeadersEnabled`.
|
||
|
|
*/
|
||
|
|
renderSectionHeader?: ?(info: {
|
||
|
|
section: SectionT,
|
||
|
|
...
|
||
|
|
}) => null | React.Element<any>,
|
||
|
|
/**
|
||
|
|
* Rendered at the bottom of each section.
|
||
|
|
*/
|
||
|
|
renderSectionFooter?: ?(info: {
|
||
|
|
section: SectionT,
|
||
|
|
...
|
||
|
|
}) => null | React.Element<any>,
|
||
|
|
/**
|
||
|
|
* Rendered at the top and bottom of each section (note this is different from
|
||
|
|
* `ItemSeparatorComponent` which is only rendered between items). These are intended to separate
|
||
|
|
* sections from the headers above and below and typically have the same highlight response as
|
||
|
|
* `ItemSeparatorComponent`. Also receives `highlighted`, `[leading/trailing][Item/Separator]`,
|
||
|
|
* and any custom props from `separators.updateProps`.
|
||
|
|
*/
|
||
|
|
SectionSeparatorComponent?: ?React.ComponentType<any>,
|
||
|
|
/**
|
||
|
|
* Makes section headers stick to the top of the screen until the next one pushes it off. Only
|
||
|
|
* enabled by default on iOS because that is the platform standard there.
|
||
|
|
*/
|
||
|
|
stickySectionHeadersEnabled?: boolean,
|
||
|
|
onEndReached?: ?({distanceFromEnd: number, ...}) => void,
|
||
|
|
|};
|
||
|
|
|
||
|
|
type VirtualizedListProps = React.ElementProps<typeof VirtualizedList>;
|
||
|
|
|
||
|
|
export type Props<SectionT> = {|
|
||
|
|
...RequiredProps<SectionT>,
|
||
|
|
...OptionalProps<SectionT>,
|
||
|
|
...$Diff<
|
||
|
|
VirtualizedListProps,
|
||
|
|
{renderItem: $PropertyType<VirtualizedListProps, 'renderItem'>, ...},
|
||
|
|
>,
|
||
|
|
|};
|
||
|
|
export type ScrollToLocationParamsType = {|
|
||
|
|
animated?: ?boolean,
|
||
|
|
itemIndex: number,
|
||
|
|
sectionIndex: number,
|
||
|
|
viewOffset?: number,
|
||
|
|
viewPosition?: number,
|
||
|
|
|};
|
||
|
|
|
||
|
|
type DefaultProps = {|
|
||
|
|
...typeof VirtualizedList.defaultProps,
|
||
|
|
data: $ReadOnlyArray<Item>,
|
||
|
|
|};
|
||
|
|
|
||
|
|
type State = {childProps: VirtualizedListProps, ...};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Right now this just flattens everything into one list and uses VirtualizedList under the
|
||
|
|
* hood. The only operation that might not scale well is concatting the data arrays of all the
|
||
|
|
* sections when new props are received, which should be plenty fast for up to ~10,000 items.
|
||
|
|
*/
|
||
|
|
class VirtualizedSectionList<
|
||
|
|
SectionT: SectionBase<any>,
|
||
|
|
> extends React.PureComponent<Props<SectionT>, State> {
|
||
|
|
static defaultProps: DefaultProps = {
|
||
|
|
...VirtualizedList.defaultProps,
|
||
|
|
data: [],
|
||
|
|
};
|
||
|
|
|
||
|
|
scrollToLocation(params: ScrollToLocationParamsType) {
|
||
|
|
let index = params.itemIndex;
|
||
|
|
for (let i = 0; i < params.sectionIndex; i++) {
|
||
|
|
index += this.props.getItemCount(this.props.sections[i].data) + 2;
|
||
|
|
}
|
||
|
|
let viewOffset = params.viewOffset || 0;
|
||
|
|
if (params.itemIndex > 0 && this.props.stickySectionHeadersEnabled) {
|
||
|
|
// $FlowFixMe Cannot access private property
|
||
|
|
const frame = this._listRef._getFrameMetricsApprox(
|
||
|
|
index - params.itemIndex,
|
||
|
|
);
|
||
|
|
viewOffset += frame.length;
|
||
|
|
}
|
||
|
|
const toIndexParams = {
|
||
|
|
...params,
|
||
|
|
viewOffset,
|
||
|
|
index,
|
||
|
|
};
|
||
|
|
this._listRef.scrollToIndex(toIndexParams);
|
||
|
|
}
|
||
|
|
|
||
|
|
getListRef(): VirtualizedList {
|
||
|
|
return this._listRef;
|
||
|
|
}
|
||
|
|
|
||
|
|
constructor(props: Props<SectionT>, context: Object) {
|
||
|
|
super(props, context);
|
||
|
|
this.state = this._computeState(props);
|
||
|
|
}
|
||
|
|
|
||
|
|
UNSAFE_componentWillReceiveProps(nextProps: Props<SectionT>) {
|
||
|
|
this.setState(this._computeState(nextProps));
|
||
|
|
}
|
||
|
|
|
||
|
|
_computeState(props: Props<SectionT>): State {
|
||
|
|
const offset = props.ListHeaderComponent ? 1 : 0;
|
||
|
|
const stickyHeaderIndices = [];
|
||
|
|
const itemCount = props.sections
|
||
|
|
? props.sections.reduce((v, section) => {
|
||
|
|
stickyHeaderIndices.push(v + offset);
|
||
|
|
return v + props.getItemCount(section.data) + 2; // Add two for the section header and footer.
|
||
|
|
}, 0)
|
||
|
|
: 0;
|
||
|
|
|
||
|
|
const {
|
||
|
|
SectionSeparatorComponent,
|
||
|
|
renderItem,
|
||
|
|
renderSectionFooter,
|
||
|
|
renderSectionHeader,
|
||
|
|
sections: _sections,
|
||
|
|
stickySectionHeadersEnabled,
|
||
|
|
...restProps
|
||
|
|
} = props;
|
||
|
|
|
||
|
|
return {
|
||
|
|
childProps: {
|
||
|
|
...restProps,
|
||
|
|
renderItem: this._renderItem,
|
||
|
|
ItemSeparatorComponent: undefined, // Rendered with renderItem
|
||
|
|
data: props.sections,
|
||
|
|
getItemCount: () => itemCount,
|
||
|
|
// $FlowFixMe
|
||
|
|
getItem: (sections, index) => this._getItem(props, sections, index),
|
||
|
|
keyExtractor: this._keyExtractor,
|
||
|
|
onViewableItemsChanged: props.onViewableItemsChanged
|
||
|
|
? this._onViewableItemsChanged
|
||
|
|
: undefined,
|
||
|
|
stickyHeaderIndices: props.stickySectionHeadersEnabled
|
||
|
|
? stickyHeaderIndices
|
||
|
|
: undefined,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
render(): React.Node {
|
||
|
|
return (
|
||
|
|
<VirtualizedList {...this.state.childProps} ref={this._captureRef} />
|
||
|
|
);
|
||
|
|
}
|
||
|
|
|
||
|
|
_getItem = (
|
||
|
|
props: Props<SectionT>,
|
||
|
|
sections: ?$ReadOnlyArray<Item>,
|
||
|
|
index: number,
|
||
|
|
): ?Item => {
|
||
|
|
if (!sections) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
let itemIdx = index - 1;
|
||
|
|
for (let i = 0; i < sections.length; i++) {
|
||
|
|
const section = sections[i];
|
||
|
|
const sectionData = section.data;
|
||
|
|
const itemCount = props.getItemCount(sectionData);
|
||
|
|
if (itemIdx === -1 || itemIdx === itemCount) {
|
||
|
|
// We intend for there to be overflow by one on both ends of the list.
|
||
|
|
// This will be for headers and footers. When returning a header or footer
|
||
|
|
// item the section itself is the item.
|
||
|
|
return section;
|
||
|
|
} else if (itemIdx < itemCount) {
|
||
|
|
// If we are in the bounds of the list's data then return the item.
|
||
|
|
return props.getItem(sectionData, itemIdx);
|
||
|
|
} else {
|
||
|
|
itemIdx -= itemCount + 2; // Add two for the header and footer
|
||
|
|
}
|
||
|
|
}
|
||
|
|
return null;
|
||
|
|
};
|
||
|
|
|
||
|
|
_keyExtractor = (item: Item, index: number) => {
|
||
|
|
const info = this._subExtractor(index);
|
||
|
|
return (info && info.key) || String(index);
|
||
|
|
};
|
||
|
|
|
||
|
|
_subExtractor(
|
||
|
|
index: number,
|
||
|
|
): ?{
|
||
|
|
section: SectionT,
|
||
|
|
// Key of the section or combined key for section + item
|
||
|
|
key: string,
|
||
|
|
// Relative index within the section
|
||
|
|
index: ?number,
|
||
|
|
// True if this is the section header
|
||
|
|
header?: ?boolean,
|
||
|
|
leadingItem?: ?Item,
|
||
|
|
leadingSection?: ?SectionT,
|
||
|
|
trailingItem?: ?Item,
|
||
|
|
trailingSection?: ?SectionT,
|
||
|
|
...
|
||
|
|
} {
|
||
|
|
let itemIndex = index;
|
||
|
|
const {getItem, getItemCount, keyExtractor, sections} = this.props;
|
||
|
|
for (let i = 0; i < sections.length; i++) {
|
||
|
|
const section = sections[i];
|
||
|
|
const sectionData = section.data;
|
||
|
|
const key = section.key || String(i);
|
||
|
|
itemIndex -= 1; // The section adds an item for the header
|
||
|
|
if (itemIndex >= getItemCount(sectionData) + 1) {
|
||
|
|
itemIndex -= getItemCount(sectionData) + 1; // The section adds an item for the footer.
|
||
|
|
} else if (itemIndex === -1) {
|
||
|
|
return {
|
||
|
|
section,
|
||
|
|
key: key + ':header',
|
||
|
|
index: null,
|
||
|
|
header: true,
|
||
|
|
trailingSection: sections[i + 1],
|
||
|
|
};
|
||
|
|
} else if (itemIndex === getItemCount(sectionData)) {
|
||
|
|
return {
|
||
|
|
section,
|
||
|
|
key: key + ':footer',
|
||
|
|
index: null,
|
||
|
|
header: false,
|
||
|
|
trailingSection: sections[i + 1],
|
||
|
|
};
|
||
|
|
} else {
|
||
|
|
const extractor = section.keyExtractor || keyExtractor;
|
||
|
|
return {
|
||
|
|
section,
|
||
|
|
key:
|
||
|
|
key + ':' + extractor(getItem(sectionData, itemIndex), itemIndex),
|
||
|
|
index: itemIndex,
|
||
|
|
leadingItem: getItem(sectionData, itemIndex - 1),
|
||
|
|
leadingSection: sections[i - 1],
|
||
|
|
trailingItem: getItem(sectionData, itemIndex + 1),
|
||
|
|
trailingSection: sections[i + 1],
|
||
|
|
};
|
||
|
|
}
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
_convertViewable = (viewable: ViewToken): ?ViewToken => {
|
||
|
|
invariant(viewable.index != null, 'Received a broken ViewToken');
|
||
|
|
const info = this._subExtractor(viewable.index);
|
||
|
|
if (!info) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
const keyExtractor = info.section.keyExtractor || this.props.keyExtractor;
|
||
|
|
return {
|
||
|
|
...viewable,
|
||
|
|
index: info.index,
|
||
|
|
/* $FlowFixMe(>=0.63.0 site=react_native_fb) This comment suppresses an
|
||
|
|
* error found when Flow v0.63 was deployed. To see the error delete this
|
||
|
|
* comment and run Flow. */
|
||
|
|
key: keyExtractor(viewable.item, info.index),
|
||
|
|
section: info.section,
|
||
|
|
};
|
||
|
|
};
|
||
|
|
|
||
|
|
_onViewableItemsChanged = ({
|
||
|
|
viewableItems,
|
||
|
|
changed,
|
||
|
|
}: {
|
||
|
|
viewableItems: Array<ViewToken>,
|
||
|
|
changed: Array<ViewToken>,
|
||
|
|
...
|
||
|
|
}) => {
|
||
|
|
const onViewableItemsChanged = this.props.onViewableItemsChanged;
|
||
|
|
if (onViewableItemsChanged != null) {
|
||
|
|
onViewableItemsChanged({
|
||
|
|
viewableItems: viewableItems
|
||
|
|
.map(this._convertViewable, this)
|
||
|
|
.filter(Boolean),
|
||
|
|
changed: changed.map(this._convertViewable, this).filter(Boolean),
|
||
|
|
});
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
_renderItem = ({item, index}: {item: Item, index: number, ...}) => {
|
||
|
|
const info = this._subExtractor(index);
|
||
|
|
if (!info) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
const infoIndex = info.index;
|
||
|
|
if (infoIndex == null) {
|
||
|
|
const {section} = info;
|
||
|
|
if (info.header === true) {
|
||
|
|
const {renderSectionHeader} = this.props;
|
||
|
|
return renderSectionHeader ? renderSectionHeader({section}) : null;
|
||
|
|
} else {
|
||
|
|
const {renderSectionFooter} = this.props;
|
||
|
|
return renderSectionFooter ? renderSectionFooter({section}) : null;
|
||
|
|
}
|
||
|
|
} else {
|
||
|
|
const renderItem = info.section.renderItem || this.props.renderItem;
|
||
|
|
const SeparatorComponent = this._getSeparatorComponent(index, info);
|
||
|
|
invariant(renderItem, 'no renderItem!');
|
||
|
|
return (
|
||
|
|
<ItemWithSeparator
|
||
|
|
SeparatorComponent={SeparatorComponent}
|
||
|
|
LeadingSeparatorComponent={
|
||
|
|
infoIndex === 0 ? this.props.SectionSeparatorComponent : undefined
|
||
|
|
}
|
||
|
|
cellKey={info.key}
|
||
|
|
index={infoIndex}
|
||
|
|
item={item}
|
||
|
|
leadingItem={info.leadingItem}
|
||
|
|
leadingSection={info.leadingSection}
|
||
|
|
onUpdateSeparator={this._onUpdateSeparator}
|
||
|
|
prevCellKey={(this._subExtractor(index - 1) || {}).key}
|
||
|
|
ref={ref => {
|
||
|
|
this._cellRefs[info.key] = ref;
|
||
|
|
}}
|
||
|
|
renderItem={renderItem}
|
||
|
|
section={info.section}
|
||
|
|
trailingItem={info.trailingItem}
|
||
|
|
trailingSection={info.trailingSection}
|
||
|
|
inverted={!!this.props.inverted}
|
||
|
|
/>
|
||
|
|
);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
_onUpdateSeparator = (key: string, newProps: Object) => {
|
||
|
|
const ref = this._cellRefs[key];
|
||
|
|
ref && ref.updateSeparatorProps(newProps);
|
||
|
|
};
|
||
|
|
|
||
|
|
_getSeparatorComponent(
|
||
|
|
index: number,
|
||
|
|
info?: ?Object,
|
||
|
|
): ?React.ComponentType<any> {
|
||
|
|
info = info || this._subExtractor(index);
|
||
|
|
if (!info) {
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
const ItemSeparatorComponent =
|
||
|
|
info.section.ItemSeparatorComponent || this.props.ItemSeparatorComponent;
|
||
|
|
const {SectionSeparatorComponent} = this.props;
|
||
|
|
const isLastItemInList = index === this.state.childProps.getItemCount() - 1;
|
||
|
|
const isLastItemInSection =
|
||
|
|
info.index === this.props.getItemCount(info.section.data) - 1;
|
||
|
|
if (SectionSeparatorComponent && isLastItemInSection) {
|
||
|
|
return SectionSeparatorComponent;
|
||
|
|
}
|
||
|
|
if (ItemSeparatorComponent && !isLastItemInSection && !isLastItemInList) {
|
||
|
|
return ItemSeparatorComponent;
|
||
|
|
}
|
||
|
|
return null;
|
||
|
|
}
|
||
|
|
|
||
|
|
_cellRefs = {};
|
||
|
|
_listRef: VirtualizedList;
|
||
|
|
_captureRef = ref => {
|
||
|
|
/* $FlowFixMe(>=0.53.0 site=react_native_fb,react_native_oss) This comment
|
||
|
|
* suppresses an error when upgrading Flow's support for React. To see the
|
||
|
|
* error delete this comment and run Flow. */
|
||
|
|
this._listRef = ref;
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
type ItemWithSeparatorCommonProps = $ReadOnly<{|
|
||
|
|
leadingItem: ?Item,
|
||
|
|
leadingSection: ?Object,
|
||
|
|
section: Object,
|
||
|
|
trailingItem: ?Item,
|
||
|
|
trailingSection: ?Object,
|
||
|
|
|}>;
|
||
|
|
|
||
|
|
type ItemWithSeparatorProps = $ReadOnly<{|
|
||
|
|
...ItemWithSeparatorCommonProps,
|
||
|
|
LeadingSeparatorComponent: ?React.ComponentType<any>,
|
||
|
|
SeparatorComponent: ?React.ComponentType<any>,
|
||
|
|
cellKey: string,
|
||
|
|
index: number,
|
||
|
|
item: Item,
|
||
|
|
onUpdateSeparator: (cellKey: string, newProps: Object) => void,
|
||
|
|
prevCellKey?: ?string,
|
||
|
|
renderItem: Function,
|
||
|
|
inverted: boolean,
|
||
|
|
|}>;
|
||
|
|
|
||
|
|
type ItemWithSeparatorState = {
|
||
|
|
separatorProps: $ReadOnly<{|
|
||
|
|
highlighted: false,
|
||
|
|
...ItemWithSeparatorCommonProps,
|
||
|
|
|}>,
|
||
|
|
leadingSeparatorProps: $ReadOnly<{|
|
||
|
|
highlighted: false,
|
||
|
|
...ItemWithSeparatorCommonProps,
|
||
|
|
|}>,
|
||
|
|
...
|
||
|
|
};
|
||
|
|
|
||
|
|
class ItemWithSeparator extends React.Component<
|
||
|
|
ItemWithSeparatorProps,
|
||
|
|
ItemWithSeparatorState,
|
||
|
|
> {
|
||
|
|
state = {
|
||
|
|
separatorProps: {
|
||
|
|
highlighted: false,
|
||
|
|
leadingItem: this.props.item,
|
||
|
|
leadingSection: this.props.leadingSection,
|
||
|
|
section: this.props.section,
|
||
|
|
trailingItem: this.props.trailingItem,
|
||
|
|
trailingSection: this.props.trailingSection,
|
||
|
|
},
|
||
|
|
leadingSeparatorProps: {
|
||
|
|
highlighted: false,
|
||
|
|
leadingItem: this.props.leadingItem,
|
||
|
|
leadingSection: this.props.leadingSection,
|
||
|
|
section: this.props.section,
|
||
|
|
trailingItem: this.props.item,
|
||
|
|
trailingSection: this.props.trailingSection,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
_separators = {
|
||
|
|
highlight: () => {
|
||
|
|
['leading', 'trailing'].forEach(s =>
|
||
|
|
this._separators.updateProps(s, {highlighted: true}),
|
||
|
|
);
|
||
|
|
},
|
||
|
|
unhighlight: () => {
|
||
|
|
['leading', 'trailing'].forEach(s =>
|
||
|
|
this._separators.updateProps(s, {highlighted: false}),
|
||
|
|
);
|
||
|
|
},
|
||
|
|
updateProps: (select: 'leading' | 'trailing', newProps: Object) => {
|
||
|
|
const {LeadingSeparatorComponent, cellKey, prevCellKey} = this.props;
|
||
|
|
if (select === 'leading' && LeadingSeparatorComponent != null) {
|
||
|
|
this.setState(state => ({
|
||
|
|
leadingSeparatorProps: {...state.leadingSeparatorProps, ...newProps},
|
||
|
|
}));
|
||
|
|
} else {
|
||
|
|
this.props.onUpdateSeparator(
|
||
|
|
(select === 'leading' && prevCellKey) || cellKey,
|
||
|
|
newProps,
|
||
|
|
);
|
||
|
|
}
|
||
|
|
},
|
||
|
|
};
|
||
|
|
|
||
|
|
static getDerivedStateFromProps(
|
||
|
|
props: ItemWithSeparatorProps,
|
||
|
|
prevState: ItemWithSeparatorState,
|
||
|
|
): ?ItemWithSeparatorState {
|
||
|
|
return {
|
||
|
|
separatorProps: {
|
||
|
|
...prevState.separatorProps,
|
||
|
|
leadingItem: props.item,
|
||
|
|
leadingSection: props.leadingSection,
|
||
|
|
section: props.section,
|
||
|
|
trailingItem: props.trailingItem,
|
||
|
|
trailingSection: props.trailingSection,
|
||
|
|
},
|
||
|
|
leadingSeparatorProps: {
|
||
|
|
...prevState.leadingSeparatorProps,
|
||
|
|
leadingItem: props.leadingItem,
|
||
|
|
leadingSection: props.leadingSection,
|
||
|
|
section: props.section,
|
||
|
|
trailingItem: props.item,
|
||
|
|
trailingSection: props.trailingSection,
|
||
|
|
},
|
||
|
|
};
|
||
|
|
}
|
||
|
|
|
||
|
|
updateSeparatorProps(newProps: Object) {
|
||
|
|
this.setState(state => ({
|
||
|
|
separatorProps: {...state.separatorProps, ...newProps},
|
||
|
|
}));
|
||
|
|
}
|
||
|
|
|
||
|
|
render() {
|
||
|
|
const {
|
||
|
|
LeadingSeparatorComponent,
|
||
|
|
SeparatorComponent,
|
||
|
|
item,
|
||
|
|
index,
|
||
|
|
section,
|
||
|
|
inverted,
|
||
|
|
} = this.props;
|
||
|
|
const element = this.props.renderItem({
|
||
|
|
item,
|
||
|
|
index,
|
||
|
|
section,
|
||
|
|
separators: this._separators,
|
||
|
|
});
|
||
|
|
const leadingSeparator = LeadingSeparatorComponent && (
|
||
|
|
<LeadingSeparatorComponent {...this.state.leadingSeparatorProps} />
|
||
|
|
);
|
||
|
|
const separator = SeparatorComponent && (
|
||
|
|
<SeparatorComponent {...this.state.separatorProps} />
|
||
|
|
);
|
||
|
|
return leadingSeparator || separator ? (
|
||
|
|
/* $FlowFixMe(>=0.89.0 site=react_native_fb) This comment suppresses an
|
||
|
|
* error found when Flow v0.89 was deployed. To see the error, delete
|
||
|
|
* this comment and run Flow. */
|
||
|
|
<View>
|
||
|
|
{!inverted ? leadingSeparator : separator}
|
||
|
|
{element}
|
||
|
|
{!inverted ? separator : leadingSeparator}
|
||
|
|
</View>
|
||
|
|
) : (
|
||
|
|
element
|
||
|
|
);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
module.exports = VirtualizedSectionList;
|