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// Copyright (c) 2015-present Mattermost, Inc. All Rights Reserved.
// See License.txt for license information.
import $ from 'jquery';
import ReactDOM from 'react-dom';
import * as GlobalActions from 'actions/global_actions.jsx';
import SuggestionStore from 'stores/suggestion_store.jsx';
import {FormattedMessage} from 'react-intl';
import React from 'react';
export default class SuggestionList extends React.Component {
static propTypes = {
suggestionId: React.PropTypes.string.isRequired,
location: React.PropTypes.string,
renderDividers: React.PropTypes.bool
};
static defaultProps = {
renderDividers: false
};
constructor(props) {
super(props);
this.getStateFromStores = this.getStateFromStores.bind(this);
this.getContent = this.getContent.bind(this);
this.handleItemClick = this.handleItemClick.bind(this);
this.handleSuggestionsChanged = this.handleSuggestionsChanged.bind(this);
this.scrollToItem = this.scrollToItem.bind(this);
this.state = this.getStateFromStores(props.suggestionId);
}
getStateFromStores(suggestionId) {
const suggestions = SuggestionStore.getSuggestions(suggestionId || this.props.suggestionId);
return {
matchedPretext: suggestions.matchedPretext,
items: suggestions.items,
terms: suggestions.terms,
components: suggestions.components,
selection: suggestions.selection
};
}
componentDidMount() {
SuggestionStore.addSuggestionsChangedListener(this.props.suggestionId, this.handleSuggestionsChanged);
}
componentDidUpdate(prevProps, prevState) {
if (this.state.selection !== prevState.selection && this.state.selection) {
this.scrollToItem(this.state.selection);
}
}
componentWillUnmount() {
SuggestionStore.removeSuggestionsChangedListener(this.props.suggestionId, this.handleSuggestionsChanged);
}
getContent() {
return $(ReactDOM.findDOMNode(this.refs.content));
}
handleItemClick(term, matchedPretext) {
GlobalActions.emitCompleteWordSuggestion(this.props.suggestionId, term, matchedPretext);
}
handleSuggestionsChanged() {
this.setState(this.getStateFromStores());
}
scrollToItem(term) {
const content = this.getContent();
if (!content || content.length === 0) {
return;
}
const visibleContentHeight = content[0].clientHeight;
const actualContentHeight = content[0].scrollHeight;
if (visibleContentHeight < actualContentHeight) {
const contentTop = content.scrollTop();
const contentTopPadding = parseInt(content.css('padding-top'), 10);
const contentBottomPadding = parseInt(content.css('padding-top'), 10);
const item = $(ReactDOM.findDOMNode(this.refs[term]));
const itemTop = item[0].offsetTop - parseInt(item.css('margin-top'), 10);
const itemBottomMargin = parseInt(item.css('margin-bottom'), 10) + parseInt(item.css('padding-bottom'), 10);
const itemBottom = item[0].offsetTop + item.height() + itemBottomMargin;
if (itemTop - contentTopPadding < contentTop) {
// the item is off the top of the visible space
content.scrollTop(itemTop - contentTopPadding);
} else if (itemBottom + contentTopPadding + contentBottomPadding > contentTop + visibleContentHeight) {
// the item has gone off the bottom of the visible space
content.scrollTop((itemBottom - visibleContentHeight) + contentTopPadding + contentBottomPadding);
}
}
}
renderDivider(type) {
return (
<div
key={type + '-divider'}
className='suggestion-list__divider'
>
<span>
<FormattedMessage id={'suggestion.' + type}/>
</span>
</div>
);
}
render() {
if (this.state.items.length === 0) {
return null;
}
const items = [];
let lastType;
for (let i = 0; i < this.state.items.length; i++) {
const item = this.state.items[i];
const term = this.state.terms[i];
const isSelection = term === this.state.selection;
// ReactComponent names need to be upper case when used in JSX
const Component = this.state.components[i];
if (this.props.renderDividers && item.type !== lastType) {
items.push(this.renderDivider(item.type));
lastType = item.type;
}
items.push(
<Component
key={term}
ref={term}
item={this.state.items[i]}
term={term}
matchedPretext={this.state.matchedPretext[i]}
isSelection={isSelection}
onClick={this.handleItemClick}
/>
);
}
const mainClass = 'suggestion-list suggestion-list--' + this.props.location;
const contentClass = 'suggestion-list__content suggestion-list__content--' + this.props.location;
return (
<div className={mainClass}>
<div
ref='content'
className={contentClass}
>
{items}
</div>
</div>
);
}
}
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