588 lines
18 KiB
JavaScript
588 lines
18 KiB
JavaScript
/* eslint-disable */
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/*
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This is taken from https://github.com/reactjs/react-autocomplete
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We aren't using that component because (for now) there is no way to autohightlight
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the first item if it isn't an exact match from what is in the search bar.
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Our use case is:
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value in search bar: "hello"
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first suggestion: "lbry://hello"
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I changed the function maybeAutoCompleteText to check if the suggestion contains
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the search query anywhere, instead of the suggestion starting with it
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https://github.com/reactjs/react-autocomplete/issues/239
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*/
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import React from 'react';
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import { findDOMNode } from 'react-dom';
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import scrollIntoView from 'dom-scroll-into-view';
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const IMPERATIVE_API = [
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'blur',
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'checkValidity',
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'click',
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'focus',
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'select',
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'setCustomValidity',
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'setSelectionRange',
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'setRangeText',
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];
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function getScrollOffset() {
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return {
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x:
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window.pageXOffset !== undefined
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? window.pageXOffset
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: (document.documentElement || document.body.parentNode || document.body).scrollLeft,
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y:
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window.pageYOffset !== undefined
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? window.pageYOffset
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: (document.documentElement || document.body.parentNode || document.body).scrollTop,
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};
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}
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export default class Autocomplete extends React.Component {
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// static propTypes = {
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// /**
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// * The items to display in the dropdown menu
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// */
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// items: PropTypes.array.isRequired,
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// /**
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// * The value to display in the input field
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// */
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// value: PropTypes.any,
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// /**
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// * Arguments: `event: Event, value: String`
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// *
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// * Invoked every time the user changes the input's value.
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// */
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// onChange: PropTypes.func,
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// /**
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// * Arguments: `value: String, item: Any`
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// *
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// * Invoked when the user selects an item from the dropdown menu.
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// */
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// onSelect: PropTypes.func,
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// /**
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// * Arguments: `item: Any, value: String`
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// *
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// * Invoked for each entry in `items` and its return value is used to
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// * determine whether or not it should be displayed in the dropdown menu.
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// * By default all items are always rendered.
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// */
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// shouldItemRender: PropTypes.func,
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// /**
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// * Arguments: `itemA: Any, itemB: Any, value: String`
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// *
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// * The function which is used to sort `items` before display.
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// */
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// sortItems: PropTypes.func,
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// /**
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// * Arguments: `item: Any`
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// *
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// * Used to read the display value from each entry in `items`.
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// */
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// getItemValue: PropTypes.func.isRequired,
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// /**
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// * Arguments: `item: Any, isHighlighted: Boolean, styles: Object`
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// *
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// * Invoked for each entry in `items` that also passes `shouldItemRender` to
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// * generate the render tree for each item in the dropdown menu. `styles` is
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// * an optional set of styles that can be applied to improve the look/feel
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// * of the items in the dropdown menu.
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// */
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// renderItem: PropTypes.func.isRequired,
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// /**
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// * Arguments: `items: Array<Any>, value: String, styles: Object`
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// *
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// * Invoked to generate the render tree for the dropdown menu. Ensure the
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// * returned tree includes every entry in `items` or else the highlight order
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// * and keyboard navigation logic will break. `styles` will contain
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// * { top, left, minWidth } which are the coordinates of the top-left corner
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// * and the width of the dropdown menu.
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// */
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// renderMenu: PropTypes.func,
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// /**
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// * Styles that are applied to the dropdown menu in the default `renderMenu`
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// * implementation. If you override `renderMenu` and you want to use
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// * `menuStyle` you must manually apply them (`this.props.menuStyle`).
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// */
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// menuStyle: PropTypes.object,
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// /**
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// * Arguments: `props: Object`
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// *
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// * Invoked to generate the input element. The `props` argument is the result
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// * of merging `props.inputProps` with a selection of props that are required
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// * both for functionality and accessibility. At the very least you need to
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// * apply `props.ref` and all `props.on<event>` event handlers. Failing to do
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// * this will cause `Autocomplete` to behave unexpectedly.
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// */
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// renderInput: PropTypes.func,
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// /**
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// * Props passed to `props.renderInput`. By default these props will be
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// * applied to the `<input />` element rendered by `Autocomplete`, unless you
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// * have specified a custom value for `props.renderInput`. Any properties
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// * supported by `HTMLInputElement` can be specified, apart from the
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// * following which are set by `Autocomplete`: value, autoComplete, role,
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// * aria-autocomplete. `inputProps` is commonly used for (but not limited to)
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// * placeholder, event handlers (onFocus, onBlur, etc.), autoFocus, etc..
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// */
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// inputProps: PropTypes.object,
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// /**
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// * Props that are applied to the element which wraps the `<input />` and
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// * dropdown menu elements rendered by `Autocomplete`.
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// */
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// wrapperProps: PropTypes.object,
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// /**
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// * This is a shorthand for `wrapperProps={{ style: <your styles> }}`.
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// * Note that `wrapperStyle` is applied before `wrapperProps`, so the latter
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// * will win if it contains a `style` entry.
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// */
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// wrapperStyle: PropTypes.object,
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// /**
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// * Whether or not to automatically highlight the top match in the dropdown
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// * menu.
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// */
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// autoHighlight: PropTypes.bool,
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// /**
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// * Whether or not to automatically select the highlighted item when the
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// * `<input>` loses focus.
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// */
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// selectOnBlur: PropTypes.bool,
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// /**
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// * Arguments: `isOpen: Boolean`
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// *
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// * Invoked every time the dropdown menu's visibility changes (i.e. every
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// * time it is displayed/hidden).
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// */
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// onMenuVisibilityChange: PropTypes.func,
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// /**
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// * Used to override the internal logic which displays/hides the dropdown
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// * menu. This is useful if you want to force a certain state based on your
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// * UX/business logic. Use it together with `onMenuVisibilityChange` for
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// * fine-grained control over the dropdown menu dynamics.
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// */
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// open: PropTypes.bool,
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// debug: PropTypes.bool,
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// };
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static defaultProps = {
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value: '',
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wrapperProps: {},
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wrapperStyle: {
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display: 'inline-block',
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},
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inputProps: {},
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renderInput(props) {
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return <input {...props} />;
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},
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onChange() {},
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onSelect() {},
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renderMenu(items, value, style) {
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return <div style={{ ...style, ...this.menuStyle }} children={items} />;
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},
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menuStyle: {
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position: 'absolute',
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overflow: 'hidden',
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},
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autoHighlight: true,
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selectOnBlur: false,
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onMenuVisibilityChange() {},
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};
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constructor(props) {
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super(props);
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this.state = {
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isOpen: false,
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highlightedIndex: null,
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};
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this._debugStates = [];
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this.ensureHighlightedIndex = this.ensureHighlightedIndex.bind(this);
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this.exposeAPI = this.exposeAPI.bind(this);
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this.handleInputFocus = this.handleInputFocus.bind(this);
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this.handleInputBlur = this.handleInputBlur.bind(this);
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this.handleChange = this.handleChange.bind(this);
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this.handleKeyDown = this.handleKeyDown.bind(this);
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this.handleInputClick = this.handleInputClick.bind(this);
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this.maybeAutoCompleteText = this.maybeAutoCompleteText.bind(this);
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}
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UNSAFE_componentWillMount() {
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// this.refs is frozen, so we need to assign a new object to it
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this.refs = {};
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this._ignoreBlur = false;
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this._ignoreFocus = false;
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this._scrollOffset = null;
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this._scrollTimer = null;
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}
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componentWillUnmount() {
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clearTimeout(this._scrollTimer);
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this._scrollTimer = null;
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}
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UNSAFE_componentWillReceiveProps(nextProps) {
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if (this.state.highlightedIndex !== null) {
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this.setState(this.ensureHighlightedIndex);
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}
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if (nextProps.autoHighlight && (this.props.value !== nextProps.value || this.state.highlightedIndex === null)) {
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this.setState(this.maybeAutoCompleteText);
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}
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}
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componentDidMount() {
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if (this.isOpen()) {
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this.setMenuPositions();
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}
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}
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componentDidUpdate(prevProps, prevState) {
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if ((this.state.isOpen && !prevState.isOpen) || ('open' in this.props && this.props.open && !prevProps.open)) {
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this.setMenuPositions();
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}
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this.maybeScrollItemIntoView();
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if (prevState.isOpen !== this.state.isOpen) {
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this.props.onMenuVisibilityChange(this.state.isOpen);
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}
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}
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exposeAPI(el) {
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this.refs.input = el;
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IMPERATIVE_API.forEach(ev => (this[ev] = el && el[ev] && el[ev].bind(el)));
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}
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maybeScrollItemIntoView() {
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if (this.isOpen() && this.state.highlightedIndex !== null) {
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const itemNode = this.refs[`item-${this.state.highlightedIndex}`];
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const menuNode = this.refs.menu;
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scrollIntoView(findDOMNode(itemNode), findDOMNode(menuNode), {
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onlyScrollIfNeeded: true,
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});
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}
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}
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handleKeyDown(event) {
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if (Autocomplete.keyDownHandlers[event.key]) {
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Autocomplete.keyDownHandlers[event.key].call(this, event);
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} else if (!this.isOpen()) {
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this.setState({
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isOpen: true,
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});
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}
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}
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handleChange(event) {
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this.props.onChange(event, event.target.value);
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}
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static keyDownHandlers = {
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ArrowDown(event) {
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event.preventDefault();
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const itemsLength = this.getFilteredItems(this.props).length;
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if (!itemsLength) return;
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const { highlightedIndex } = this.state;
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const index = highlightedIndex === null || highlightedIndex === itemsLength - 1 ? 0 : highlightedIndex + 1;
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this.setState({
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highlightedIndex: index,
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isOpen: true,
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});
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},
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ArrowUp(event) {
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event.preventDefault();
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const itemsLength = this.getFilteredItems(this.props).length;
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if (!itemsLength) return;
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const { highlightedIndex } = this.state;
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const index = highlightedIndex === 0 || highlightedIndex === null ? itemsLength - 1 : highlightedIndex - 1;
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this.setState({
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highlightedIndex: index,
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isOpen: true,
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});
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},
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Enter(event) {
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// Key code 229 is used for selecting items from character selectors (Pinyin, Kana, etc)
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if (event.keyCode !== 13) return;
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const inputValue = this.refs.input.value;
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if (!inputValue) return;
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if (!this.isOpen() || this.state.highlightedIndex == null) {
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// User pressed enter before any search suggestions were populated
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this.setState({ isOpen: false }, () => {
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this.props.onSelect(inputValue);
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this.refs.input.blur();
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});
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} else {
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// text entered + menu item has been highlighted + enter is hit -> update value to that of selected menu item, close the menu
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event.preventDefault();
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const item = this.getFilteredItems(this.props)[this.state.highlightedIndex];
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const value = this.props.getItemValue(item);
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this.setState(
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{
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isOpen: false,
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highlightedIndex: null,
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},
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() => {
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this.props.onSelect(value, item);
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this.refs.input.blur();
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}
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);
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}
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},
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Escape() {
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// In case the user is currently hovering over the menu
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this.setIgnoreBlur(false);
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this.setState({
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highlightedIndex: null,
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isOpen: false,
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});
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},
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Tab() {
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// In case the user is currently hovering over the menu
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this.setIgnoreBlur(false);
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},
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};
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getFilteredItems(props) {
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let items = props.items;
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if (props.shouldItemRender) {
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items = items.filter(item => props.shouldItemRender(item, props.value));
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}
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if (props.sortItems) {
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items.sort((a, b) => props.sortItems(a, b, props.value));
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}
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return items;
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}
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maybeAutoCompleteText(state, props) {
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const { highlightedIndex } = state;
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const { value, getItemValue } = props;
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const index = highlightedIndex === null ? 0 : highlightedIndex;
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const matchedItem = this.getFilteredItems(props)[index];
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if (value !== '' && matchedItem) {
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const itemValue = getItemValue(matchedItem);
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const itemValueDoesMatch = itemValue.toLowerCase().includes(
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value.toLowerCase()
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// below line is the the only thing that is changed from the real component
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);
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if (itemValueDoesMatch) {
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return { highlightedIndex: index };
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}
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}
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return { highlightedIndex: null };
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}
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ensureHighlightedIndex(state, props) {
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if (state.highlightedIndex >= this.getFilteredItems(props).length) {
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return { highlightedIndex: null };
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}
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}
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setMenuPositions() {
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const node = this.refs.input;
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const rect = node.getBoundingClientRect();
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const computedStyle = global.window.getComputedStyle(node);
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// const marginBottom = parseInt(computedStyle.marginBottom, 10) || 0;
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const marginLeft = parseInt(computedStyle.marginLeft, 10) || 0;
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const marginRight = parseInt(computedStyle.marginRight, 10) || 0;
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this.setState({
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// We may need these if we go back to a fixed header
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// menuTop: rect.bottom + marginBottom,
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// menuLeft: rect.left + marginLeft,
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menuWidth: rect.width + marginLeft + marginRight,
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});
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}
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highlightItemFromMouse(index) {
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this.setState({ highlightedIndex: index });
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}
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selectItemFromMouse(item) {
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const value = this.props.getItemValue(item);
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// The menu will de-render before a mouseLeave event
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// happens. Clear the flag to release control over focus
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this.setIgnoreBlur(false);
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this.setState(
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{
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isOpen: false,
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highlightedIndex: null,
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},
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() => {
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this.props.onSelect(value, item);
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}
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);
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}
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setIgnoreBlur(ignore) {
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this._ignoreBlur = ignore;
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}
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renderMenu() {
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if (!this.props.value) {
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return null;
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}
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const items = this.getFilteredItems(this.props).map((item, index) => {
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const element = this.props.renderItem(item, this.state.highlightedIndex === index, {
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cursor: 'default',
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});
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return React.cloneElement(element, {
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onMouseEnter: () => this.highlightItemFromMouse(index),
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onClick: () => this.selectItemFromMouse(item),
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ref: e => (this.refs[`item-${index}`] = e),
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});
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});
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const style = {
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left: this.state.menuLeft,
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top: this.state.menuTop,
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minWidth: this.state.menuWidth,
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};
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const menu = this.props.renderMenu(items, this.props.value, style);
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return React.cloneElement(menu, {
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ref: e => (this.refs.menu = e),
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className: 'wunderbar__menu',
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// Ignore blur to prevent menu from de-rendering before we can process click
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onMouseEnter: () => this.setIgnoreBlur(true),
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onMouseLeave: () => this.setIgnoreBlur(false), // uncomment this to inspect styling
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});
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}
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handleInputBlur(event) {
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if (this._ignoreBlur) {
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this._ignoreFocus = true;
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this._scrollOffset = getScrollOffset();
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this.refs.input.focus();
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return;
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}
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let setStateCallback;
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const { highlightedIndex } = this.state;
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if (this.props.selectOnBlur && highlightedIndex !== null) {
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const items = this.getFilteredItems(this.props);
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const item = items[highlightedIndex];
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const value = this.props.getItemValue(item);
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setStateCallback = () => this.props.onSelect(value, item);
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}
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this.setState(
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{
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isOpen: false,
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highlightedIndex: null,
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},
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setStateCallback
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);
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const { onBlur } = this.props.inputProps;
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if (onBlur) {
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onBlur(event);
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}
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}
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handleInputFocus(event) {
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if (this._ignoreFocus) {
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this._ignoreFocus = false;
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const { x, y } = this._scrollOffset;
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this._scrollOffset = null;
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// Focus will cause the browser to scroll the <input> into view.
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// This can cause the mouse coords to change, which in turn
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// could cause a new highlight to happen, cancelling the click
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// event (when selecting with the mouse)
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window.scrollTo(x, y);
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// Some browsers wait until all focus event handlers have been
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// processed before scrolling the <input> into view, so let's
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// scroll again on the next tick to ensure we're back to where
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// the user was before focus was lost. We could do the deferred
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// scroll only, but that causes a jarring split second jump in
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// some browsers that scroll before the focus event handlers
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// are triggered.
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clearTimeout(this._scrollTimer);
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this._scrollTimer = setTimeout(() => {
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this._scrollTimer = null;
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window.scrollTo(x, y);
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}, 0);
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return;
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}
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// Highlight
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this.refs.input.select();
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this.setState({ isOpen: true });
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const { onFocus } = this.props.inputProps;
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if (onFocus) {
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onFocus(event);
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}
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}
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isInputFocused() {
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const el = this.refs.input;
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return el.ownerDocument && el === el.ownerDocument.activeElement;
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}
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handleInputClick() {
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// Input will not be focused if it's disabled
|
|
if (this.isInputFocused() && !this.isOpen()) this.setState({ isOpen: true });
|
|
}
|
|
|
|
composeEventHandlers(internal, external) {
|
|
return external
|
|
? e => {
|
|
internal(e);
|
|
external(e);
|
|
}
|
|
: internal;
|
|
}
|
|
|
|
isOpen() {
|
|
return 'open' in this.props ? this.props.open : this.state.isOpen;
|
|
}
|
|
|
|
render() {
|
|
if (this.props.debug) {
|
|
// you don't like it, you love it
|
|
this._debugStates.push({
|
|
id: this._debugStates.length,
|
|
state: this.state,
|
|
});
|
|
}
|
|
|
|
const { inputProps, items } = this.props;
|
|
|
|
const open = this.isOpen();
|
|
return (
|
|
<div style={{ ...this.props.wrapperStyle }} {...this.props.wrapperProps}>
|
|
{this.props.renderInput({
|
|
...inputProps,
|
|
role: 'combobox',
|
|
'aria-autocomplete': 'list',
|
|
'aria-expanded': open,
|
|
autoComplete: 'off',
|
|
ref: this.exposeAPI,
|
|
onFocus: this.handleInputFocus,
|
|
onBlur: this.handleInputBlur,
|
|
onChange: this.handleChange,
|
|
onKeyDown: this.composeEventHandlers(this.handleKeyDown, inputProps.onKeyDown),
|
|
onClick: this.composeEventHandlers(this.handleInputClick, inputProps.onClick),
|
|
value: this.props.value,
|
|
})}
|
|
{open && !!items.length && this.renderMenu()}
|
|
{this.props.debug && (
|
|
<pre style={{ marginLeft: 300 }}>
|
|
{JSON.stringify(
|
|
this._debugStates.slice(Math.max(0, this._debugStates.length - 5), this._debugStates.length),
|
|
null,
|
|
2
|
|
)}
|
|
</pre>
|
|
)}
|
|
</div>
|
|
);
|
|
}
|
|
}
|
|
/* eslint-enable */
|