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Diffstat (limited to 'webapp/components/suggestion/suggestion_list.jsx')
-rw-r--r-- | webapp/components/suggestion/suggestion_list.jsx | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/webapp/components/suggestion/suggestion_list.jsx b/webapp/components/suggestion/suggestion_list.jsx new file mode 100644 index 000000000..ce950e4f4 --- /dev/null +++ b/webapp/components/suggestion/suggestion_list.jsx @@ -0,0 +1,129 @@ +// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved. +// See License.txt for license information. + +import $ from 'jquery'; +import ReactDOM from 'react-dom'; +import * as GlobalActions from 'action_creators/global_actions.jsx'; +import SuggestionStore from 'stores/suggestion_store.jsx'; + +import React from 'react'; + +export default class SuggestionList extends React.Component { + constructor(props) { + super(props); + + 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 = { + items: [], + terms: [], + components: [], + selection: '' + }; + } + + componentDidMount() { + SuggestionStore.addSuggestionsChangedListener(this.props.suggestionId, this.handleSuggestionsChanged); + } + + componentWillUnmount() { + SuggestionStore.removeSuggestionsChangedListener(this.props.suggestionId, this.handleSuggestionsChanged); + } + + getContent() { + return $(ReactDOM.findDOMNode(this.refs.content)); + } + + handleItemClick(term, e) { + GlobalActions.emitCompleteWordSuggestion(this.props.suggestionId, term); + + e.preventDefault(); + } + + handleSuggestionsChanged() { + const selection = SuggestionStore.getSelection(this.props.suggestionId); + + this.setState({ + items: SuggestionStore.getItems(this.props.suggestionId), + terms: SuggestionStore.getTerms(this.props.suggestionId), + components: SuggestionStore.getComponents(this.props.suggestionId), + selection + }); + + if (selection) { + window.requestAnimationFrame(() => this.scrollToItem(this.state.selection)); + } + } + + scrollToItem(term) { + const content = this.getContent(); + 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); + } + } + } + + render() { + if (this.state.items.length === 0) { + return null; + } + + const items = []; + 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]; + + items.push( + <Component + key={term} + ref={term} + item={item} + term={term} + isSelection={isSelection} + onClick={this.handleItemClick.bind(this, term)} + /> + ); + } + + return ( + <div className='suggestion-list suggestion-list--top'> + <div + ref='content' + className='suggestion-list__content suggestion-list__content--top' + > + {items} + </div> + </div> + ); + } +} + +SuggestionList.propTypes = { + suggestionId: React.PropTypes.string.isRequired +}; |