295 lines
9.3 KiB
JavaScript
295 lines
9.3 KiB
JavaScript
// @flow
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import _ from 'lodash';
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import React from 'react';
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import { Modal, StyleSheet, TextInput } from 'react-native';
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import Prompt from 'react-native-prompt';
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import { connect } from 'react-redux';
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import { translate } from '../../i18n';
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import { LoadingIndicator } from '../../react';
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import { set } from '../../redux';
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import AbstractDialog from './AbstractDialog';
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import type {
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Props as AbstractDialogProps,
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State as AbstractDialogState
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} from './AbstractDialog';
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import { dialog as styles } from './styles';
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/**
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* The value of the style property {@link _TAG_KEY} which identifies the
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* OK/submit button of {@code Prompt}.
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*/
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const _SUBMIT_TEXT_TAG_VALUE = '_SUBMIT_TEXT_TAG_VALUE';
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/**
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* The name of the style property which identifies ancestors of {@code Prompt}
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* such as its OK/submit button for the purposes of workarounds implemented by
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* {@code Dialog}.
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*
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* XXX The value may trigger a react-native warning in the Debug configuration
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* but, unfortunately, I couldn't find a value that wouldn't.
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*/
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const _TAG_KEY = '_TAG_KEY';
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/**
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* The type of the React {@code Component} props of {@link Dialog}.
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*/
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type Props = {
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...AbstractDialogProps,
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/**
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* I18n key to put as body title.
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*/
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bodyKey: string,
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textInputProps: Object
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};
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/**
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* The type of the React {@code Component} state of {@link Dialog}.
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*/
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type State = {
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...AbstractDialogState,
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/**
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* The text of the {@link TextInput} rendered by {@link Prompt} in
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* general and by this {@code Dialog} in particular if no
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* {@code children} are specified to it. It mimics/reimplements the
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* functionality of {@code Prompt} because this {@code Dialog} does not
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* really render the (whole) {@code Prompt}.
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*/
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text: string
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};
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/**
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* Implements {@code AbstractDialog} on react-native using {@code Prompt}.
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*/
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class Dialog extends AbstractDialog<Props, State> {
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state = {
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text: ''
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};
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/**
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* Initailizes a new {@code Dialog} instance.
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*
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* @param {Object} props - The read-only React {@code Component} props with
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* which the new instance is to be initialized.
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*/
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constructor(props: Object) {
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super(props);
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// Bind event handlers so they are only bound once per instance.
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this._onChangeText = this._onChangeText.bind(this);
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this._onSubmit = this._onSubmit.bind(this);
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}
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/**
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* Implements React's {@link Component#render()}.
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*
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* @inheritdoc
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* @returns {ReactElement}
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*/
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render() {
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const {
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bodyKey,
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cancelDisabled,
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cancelTitleKey = 'dialog.Cancel',
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okDisabled,
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okTitleKey = 'dialog.Ok',
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t /* XXX The following silences flow errors: */ = _.identity,
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titleKey,
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titleString
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} = this.props;
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const cancelButtonTextStyle
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= cancelDisabled ? styles.disabledButtonText : styles.buttonText;
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let submitButtonTextStyle
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= okDisabled ? styles.disabledButtonText : styles.buttonText;
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submitButtonTextStyle = {
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...submitButtonTextStyle,
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[_TAG_KEY]: _SUBMIT_TEXT_TAG_VALUE
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};
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let el: ?React$Element<*> = (
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<Prompt
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cancelButtonTextStyle = { cancelButtonTextStyle }
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cancelText = { t(cancelTitleKey) }
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defaultValue = { this.state.text }
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onCancel = { this._onCancel }
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onChangeText = { this._onChangeText }
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onSubmit = { this._onSubmit }
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placeholder = { t(bodyKey) }
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submitButtonTextStyle = { submitButtonTextStyle }
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submitText = { t(okTitleKey) }
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textInputProps = { this.props.textInputProps }
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title = { titleString || t(titleKey) }
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visible = { true } />
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);
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// XXX The following implements workarounds with knowledge of
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// react-native-prompt/Prompt's implementation.
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if (el) {
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// eslint-disable-next-line new-cap, no-extra-parens
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el = (new (el.type)(el.props)).render();
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}
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let { children } = this.props;
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children = React.Children.count(children) ? children : undefined;
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// eslint-disable-next-line no-shadow
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el = this._mapReactElement(el, (el: React$Element<*>) => {
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const { type } = el;
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if (type === Modal) {
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// * Modal handles hardware button presses for back navigation.
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// Firstly, we don't want Prompt's default behavior to merely
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// hide the Modal - we want this Dialog to be canceled.
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// Secondly, we cannot get Prompt's default behavior anyway
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// because we've removed Prompt and we're preserving whatever
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// it's rendered only.
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return this._cloneElement(el, /* props */ {
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onRequestClose: this._onCancel,
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supportedOrientations: [ 'landscape', 'portrait' ]
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});
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}
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if (type === TextInput) {
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// * If this Dialog has children, they are to be rendered
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// instead of Prompt's TextInput.
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if (children) {
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// $FlowExpectedError
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el = children; // eslint-disable-line no-param-reassign
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children = undefined;
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}
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} else {
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let { style } = el.props;
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if (style
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&& (style = StyleSheet.flatten(style))
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&& _TAG_KEY in style) {
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// $FlowExpectedError
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switch (style[_TAG_KEY]) {
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case _SUBMIT_TEXT_TAG_VALUE:
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if (this.state.submitting) {
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// * If this Dialog is submitting, render a
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// LoadingIndicator.
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return (
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<LoadingIndicator
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color = { submitButtonTextStyle.color }
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size = { 'small' } />
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);
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}
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break;
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}
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return this._cloneElement(el, /* props */ {
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style: set(style, _TAG_KEY, undefined)
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});
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}
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}
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return el;
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});
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return el;
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}
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/**
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* Clones a specific {@code ReactElement} and adds/merges specific props
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* into the clone.
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*
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* @param {ReactElement} el - The {@code ReactElement} to clone.
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* @param {Object} props - The props to add/merge into the clone.
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* @returns {ReactElement} The close of the specified {@code el} with
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* the specified {@code props} added/merged.
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*/
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_cloneElement(el: React$Element<*>, props) {
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return (
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React.cloneElement(
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el,
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props,
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...React.Children.toArray(el.props.children)));
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}
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/**
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* Creates a deep clone of a specific {@code ReactElement} with the results
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* of calling a specific function on every node of a specific
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* {@code ReactElement} tree.
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*
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* @param {ReactElement} el - The {@code ReactElement} to clone and
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* call the specified {@code f} on.
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* @param {Function} f - The function to call on every node of the
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* {@code ReactElement} tree represented by the specified {@code el}.
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* @private
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* @returns {ReactElement}
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*/
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_mapReactElement(
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el: ?React$Element<*>,
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f: (React$Element<*>) => ?React$Element<*>): ?React$Element<*> {
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if (!el || !el.props || !el.type) {
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return el;
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}
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let mapped = f(el);
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if (mapped) {
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const { children } = mapped.props;
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if (mapped === el || React.Children.count(children)) {
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mapped
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= React.cloneElement(
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mapped,
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/* props */ {},
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...React.Children.toArray(React.Children.map(
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children,
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function(el) { // eslint-disable-line no-shadow
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// eslint-disable-next-line no-invalid-this
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return this._mapReactElement(el, f);
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},
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this)));
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}
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}
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return mapped;
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}
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_onCancel: () => void;
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_onChangeText: (string) => void;
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/**
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* Notifies this {@code Dialog} that the text/value of the {@code TextInput}
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* rendered by {@code Prompt} has changed.
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*
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* @param {string} text - The new text/value of the {@code TextInput}
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* rendered by {@code Prompt}.
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* @returns {void}
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*/
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_onChangeText(text: string) {
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this.setState({ text });
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}
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_onSubmit: (?string) => void;
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/**
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* Submits this {@code Dialog} with the value of the {@link TextInput}
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* rendered by {@link Prompt} unless a value is explicitly specified.
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*
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* @override
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* @param {string} [value] - The submitted value if any.
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* @returns {void}
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*/
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_onSubmit(value: ?string) {
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// $FlowFixMeState
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super._onSubmit(value || this.state.text);
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}
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}
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export default translate(connect()(Dialog));
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