Replaced SearchAutocomplete with new suggestion components

web/react/components/search_autocomplete.jsx

@@ -1,341 +0,0 @@
-// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
-// See License.txt for license information.
-
-import ChannelStore from '../stores/channel_store.jsx';
-import Constants from '../utils/constants.jsx';
-const KeyCodes = Constants.KeyCodes;
-const Popover = ReactBootstrap.Popover;
-import UserStore from '../stores/user_store.jsx';
-import * as Utils from '../utils/utils.jsx';
-
-const patterns = new Map([
-    ['channels', /\b(?:in|channel):\s*(\S*)$/i],
-    ['users', /\bfrom:\s*(\S*)$/i]
-]);
-
-export default class SearchAutocomplete extends React.Component {
-    constructor(props) {
-        super(props);
-
-        this.handleClick = this.handleClick.bind(this);
-        this.handleDocumentClick = this.handleDocumentClick.bind(this);
-        this.handleInputChange = this.handleInputChange.bind(this);
-        this.handleKeyDown = this.handleKeyDown.bind(this);
-
-        this.completeWord = this.completeWord.bind(this);
-        this.getSelection = this.getSelection.bind(this);
-        this.scrollToItem = this.scrollToItem.bind(this);
-        this.updateSuggestions = this.updateSuggestions.bind(this);
-
-        this.renderChannelSuggestion = this.renderChannelSuggestion.bind(this);
-        this.renderUserSuggestion = this.renderUserSuggestion.bind(this);
-
-        this.state = {
-            show: false,
-            mode: '',
-            filter: '',
-            selection: 0,
-            suggestions: new Map()
-        };
-    }
-
-    componentDidMount() {
-        $(document).on('click', this.handleDocumentClick);
-    }
-
-    componentDidUpdate(prevProps, prevState) {
-        const content = $(ReactDOM.findDOMNode(this.refs.searchPopover)).find('.popover-content');
-
-        if (this.state.show && this.state.suggestions.length > 0) {
-            if (!prevState.show) {
-                content.perfectScrollbar();
-                content.css('max-height', $(window).height() - 200);
-            }
-
-            // keep the keyboard selection visible when scrolling
-            this.scrollToItem(this.getSelection());
-        }
-    }
-
-    componentWillUnmount() {
-        $(document).off('click', this.handleDocumentClick);
-    }
-
-    handleClick(value) {
-        this.completeWord(value);
-    }
-
-    handleDocumentClick(e) {
-        const container = $(ReactDOM.findDOMNode(this.refs.searchPopover));
-
-        if (!(container.is(e.target) || container.has(e.target).length > 0)) {
-            this.setState({
-                show: false
-            });
-        }
-    }
-
-    handleInputChange(textbox, text) {
-        const caret = Utils.getCaretPosition(textbox);
-        const preText = text.substring(0, caret);
-
-        let mode = '';
-        let filter = '';
-        for (const [modeForPattern, pattern] of patterns) {
-            const result = pattern.exec(preText);
-
-            if (result) {
-                mode = modeForPattern;
-                filter = result[1];
-                break;
-            }
-        }
-
-        if (mode !== this.state.mode || filter !== this.state.filter) {
-            this.updateSuggestions(mode, filter);
-        }
-
-        this.setState({
-            mode,
-            filter,
-            show: mode || filter
-        });
-    }
-
-    handleKeyDown(e) {
-        if (!this.state.show || this.state.suggestions.length === 0) {
-            return;
-        }
-
-        if (e.which === KeyCodes.UP || e.which === KeyCodes.DOWN) {
-            e.preventDefault();
-
-            let selection = this.state.selection;
-
-            if (e.which === KeyCodes.UP) {
-                selection -= 1;
-            } else {
-                selection += 1;
-            }
-
-            if (selection >= 0 && selection < this.state.suggestions.length) {
-                this.setState({
-                    selection
-                });
-            }
-        } else if (e.which === KeyCodes.ENTER || e.which === KeyCodes.SPACE) {
-            e.preventDefault();
-
-            this.completeWord(this.getSelection());
-        }
-    }
-
-    completeWord(value) {
-        // add a space so that anything else typed doesn't interfere with the search flag
-        this.props.completeWord(this.state.filter, value + ' ');
-
-        this.setState({
-            show: false,
-            mode: '',
-            filter: '',
-            selection: 0
-        });
-    }
-
-    getSelection() {
-        if (this.state.suggestions.length > 0) {
-            if (this.state.mode === 'channels') {
-                return this.state.suggestions[this.state.selection].name;
-            } else if (this.state.mode === 'users') {
-                return this.state.suggestions[this.state.selection].username;
-            }
-        }
-
-        return '';
-    }
-
-    scrollToItem(itemName) {
-        const content = $(ReactDOM.findDOMNode(this.refs.searchPopover)).find('.popover-content');
-        const visibleContentHeight = content[0].clientHeight;
-        const actualContentHeight = content[0].scrollHeight;
-
-        if (this.state.suggestions.length > 0 && visibleContentHeight < actualContentHeight) {
-            const contentTop = content.scrollTop();
-            const contentTopPadding = parseInt(content.css('padding-top'), 10);
-            const contentBottomPadding = parseInt(content.css('padding-top'), 10);
-
-            const item = $(this.refs[itemName]);
-            const itemTop = item[0].offsetTop - parseInt(item.css('margin-top'), 10);
-            const itemBottom = item[0].offsetTop + item.height() + parseInt(item.css('margin-bottom'), 10);
-
-            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);
-            }
-        }
-    }
-
-    updateSuggestions(mode, filter) {
-        let suggestions = [];
-
-        if (mode === 'channels') {
-            let channels = ChannelStore.getAll();
-
-            if (filter) {
-                channels = channels.filter((channel) => channel.name.startsWith(filter) && channel.type !== 'D');
-            } else {
-                // don't show direct channels
-                channels = channels.filter((channel) => channel.type !== 'D');
-            }
-
-            channels.sort((a, b) => {
-                // put public channels first and then sort alphabebetically
-                if (a.type === b.type) {
-                    return a.name.localeCompare(b.name);
-                } else if (a.type === Constants.OPEN_CHANNEL) {
-                    return -1;
-                }
-
-                return 1;
-            });
-
-            suggestions = channels;
-        } else if (mode === 'users') {
-            let users = UserStore.getActiveOnlyProfileList();
-
-            if (filter) {
-                users = users.filter((user) => user.username.startsWith(filter));
-            }
-
-            users.sort((a, b) => a.username.localeCompare(b.username));
-
-            suggestions = users;
-        }
-
-        let selection = this.state.selection;
-
-        // keep the same user/channel selected if it's still visible as a suggestion
-        if (selection > 0 && this.state.suggestions.length > 0) {
-            // we can't just use indexOf to find if the selection is still in the list since they are different javascript objects
-            const currentSelectionId = this.state.suggestions[selection].id;
-            let found = false;
-
-            for (let i = 0; i < suggestions.length; i++) {
-                if (suggestions[i].id === currentSelectionId) {
-                    selection = i;
-                    found = true;
-
-                    break;
-                }
-            }
-
-            if (!found) {
-                selection = 0;
-            }
-        } else {
-            selection = 0;
-        }
-
-        this.setState({
-            suggestions,
-            selection
-        });
-    }
-
-    renderChannelSuggestion(channel) {
-        let className = 'search-autocomplete__item';
-        if (channel.name === this.getSelection()) {
-            className += ' selected';
-        }
-
-        return (
-            <div
-                key={channel.name}
-                ref={channel.name}
-                onClick={this.handleClick.bind(this, channel.name)}
-                className={className}
-            >
-                {channel.name}
-            </div>
-        );
-    }
-
-    renderUserSuggestion(user) {
-        let className = 'search-autocomplete__item';
-        if (user.username === this.getSelection()) {
-            className += ' selected';
-        }
-
-        return (
-            <div
-                key={user.username}
-                ref={user.username}
-                onClick={this.handleClick.bind(this, user.username)}
-                className={className}
-            >
-                <img
-                    className='profile-img rounded'
-                    src={'/api/v1/users/' + user.id + '/image?time=' + user.update_at}
-                />
-                {user.username}
-            </div>
-        );
-    }
-
-    render() {
-        if (!this.state.show || this.state.suggestions.length === 0) {
-            return null;
-        }
-
-        let suggestions = [];
-
-        if (this.state.mode === 'channels') {
-            const publicChannels = this.state.suggestions.filter((channel) => channel.type === Constants.OPEN_CHANNEL);
-            if (publicChannels.length > 0) {
-                suggestions.push(
-                    <div
-                        key='public-channel-divider'
-                        className='search-autocomplete__divider'
-                    >
-                        <span>{'Public ' + Utils.getChannelTerm(Constants.OPEN_CHANNEL) + 's'}</span>
-                    </div>
-                );
-                suggestions = suggestions.concat(publicChannels.map(this.renderChannelSuggestion));
-            }
-
-            const privateChannels = this.state.suggestions.filter((channel) => channel.type === Constants.PRIVATE_CHANNEL);
-            if (privateChannels.length > 0) {
-                suggestions.push(
-                    <div
-                        key='private-channel-divider'
-                        className='search-autocomplete__divider'
-                    >
-                        <span>{'Private ' + Utils.getChannelTerm(Constants.PRIVATE_CHANNEL) + 's'}</span>
-                    </div>
-                );
-                suggestions = suggestions.concat(privateChannels.map(this.renderChannelSuggestion));
-            }
-        } else if (this.state.mode === 'users') {
-            suggestions = this.state.suggestions.map(this.renderUserSuggestion);
-        }
-
-        return (
-            <Popover
-                ref='searchPopover'
-                onShow={this.componentDidMount}
-                id='search-autocomplete__popover'
-                className='search-help-popover autocomplete visible'
-                placement='bottom'
-            >
-                {suggestions}
-            </Popover>
-        );
-    }
-}
-
-SearchAutocomplete.propTypes = {
-    completeWord: React.PropTypes.func.isRequired
-};

web/react/components/search_bar.jsx

@@ -5,11 +5,13 @@ import * as client from '../utils/client.jsx';
 import * as AsyncClient from '../utils/async_client.jsx';
 import SearchStore from '../stores/search_store.jsx';
 import AppDispatcher from '../dispatcher/app_dispatcher.jsx';
+import SuggestionBox from '../components/suggestion_box.jsx';
+import SearchChannelProvider from '../components/search_channel_provider.jsx';
+import SearchUserProvider from '../components/search_user_provider.jsx';
 import * as utils from '../utils/utils.jsx';
 import Constants from '../utils/constants.jsx';
 var ActionTypes = Constants.ActionTypes;
 var Popover = ReactBootstrap.Popover;
-import SearchAutocomplete from './search_autocomplete.jsx';
 
 export default class SearchBar extends React.Component {
     constructor() {
@@ -17,13 +19,11 @@ export default class SearchBar extends React.Component {
         this.mounted = false;
 
         this.onListenerChange = this.onListenerChange.bind(this);
-        this.handleKeyDown = this.handleKeyDown.bind(this);
         this.handleUserInput = this.handleUserInput.bind(this);
         this.handleUserFocus = this.handleUserFocus.bind(this);
         this.handleUserBlur = this.handleUserBlur.bind(this);
         this.performSearch = this.performSearch.bind(this);
         this.handleSubmit = this.handleSubmit.bind(this);
-        this.completeWord = this.completeWord.bind(this);
 
         const state = this.getSearchTermStateFromStores();
         state.focused = false;
@@ -77,18 +77,11 @@ export default class SearchBar extends React.Component {
             results: null
         });
     }
-    handleKeyDown(e) {
-        if (this.refs.autocomplete) {
-            this.refs.autocomplete.handleKeyDown(e);
-        }
-    }
-    handleUserInput(e) {
-        var term = e.target.value;
+    handleUserInput(text) {
+        var term = text;
         SearchStore.storeSearchTerm(term);
         SearchStore.emitSearchTermChange(false);
         this.setState({searchTerm: term});
-
-        this.refs.autocomplete.handleInputChange(e.target, term);
     }
     handleUserBlur() {
         this.setState({focused: false});
@@ -128,23 +121,6 @@ export default class SearchBar extends React.Component {
         this.performSearch(this.state.searchTerm.trim());
     }
 
-    completeWord(partialWord, word) {
-        const textbox = ReactDOM.findDOMNode(this.refs.search);
-        let text = textbox.value;
-
-        const caret = utils.getCaretPosition(textbox);
-        const preText = text.substring(0, caret - partialWord.length);
-        const postText = text.substring(caret);
-        text = preText + word + postText;
-
-        textbox.value = text;
-        utils.setCaretPosition(textbox, preText.length + word.length);
-
-        SearchStore.storeSearchTerm(text);
-        SearchStore.emitSearchTermChange(false);
-        this.setState({searchTerm: text});
-    }
-
     render() {
         var isSearching = null;
         if (this.state.isSearching) {
@@ -178,22 +154,17 @@ export default class SearchBar extends React.Component {
                     autoComplete='off'
                 >
                     <span className='glyphicon glyphicon-search sidebar__search-icon' />
-                    <input
-                        type='text'
+                    <SuggestionBox
                         ref='search'
                         className='form-control search-bar'
                         placeholder='Search'
                         value={this.state.searchTerm}
                         onFocus={this.handleUserFocus}
                         onBlur={this.handleUserBlur}
-                        onChange={this.handleUserInput}
-                        onKeyDown={this.handleKeyDown}
+                        onUserInput={this.handleUserInput}
+                        providers={[SearchChannelProvider, SearchUserProvider]}
                     />
                     {isSearching}
-                    <SearchAutocomplete
-                        ref='autocomplete'
-                        completeWord={this.completeWord}
-                    />
                     <Popover
                         id='searchbar-help-popup'
                         placement='bottom'

web/react/components/search_channel_provider.jsx

@@ -0,0 +1,71 @@
+// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import ChannelStore from '../stores/channel_store.jsx';
+import Constants from '../utils/constants.jsx';
+import SuggestionStore from '../stores/suggestion_store.jsx';
+
+class SearchChannelSuggestion extends React.Component {
+    render() {
+        const {item, isSelection, onClick} = this.props;
+
+        let className = 'search-autocomplete__item';
+        if (isSelection) {
+            className += ' selected';
+        }
+
+        return (
+            <div
+                onClick={onClick}
+                className={className}
+            >
+                {item.name}
+            </div>
+        );
+    }
+}
+
+SearchChannelSuggestion.propTypes = {
+    item: React.PropTypes.object.isRequired,
+    isSelection: React.PropTypes.bool,
+    onClick: React.PropTypes.func
+};
+
+class SearchChannelProvider {
+    handlePretextChanged(suggestionId, pretext) {
+        const captured = (/\b(?:in|channel):\s*(\S*)$/i).exec(pretext);
+        if (captured) {
+            const channelPrefix = captured[1];
+
+            const channels = ChannelStore.getAll();
+            const publicChannels = [];
+            const privateChannels = [];
+
+            for (const id of Object.keys(channels)) {
+                const channel = channels[id];
+
+                // don't show direct channels
+                if (channel.type !== Constants.DM_CHANNEL && channel.name.startsWith(channelPrefix)) {
+                    if (channel.type === Constants.OPEN_CHANNEL) {
+                        publicChannels.push(channel);
+                    } else {
+                        privateChannels.push(channel);
+                    }
+                }
+            }
+
+            publicChannels.sort((a, b) => a.name.localeCompare(b.name));
+            const publicChannelNames = publicChannels.map((channel) => channel.name);
+
+            privateChannels.sort((a, b) => a.name.localeCompare(b.name));
+            const privateChannelNames = privateChannels.map((channel) => channel.name);
+
+            SuggestionStore.setMatchedPretext(suggestionId, channelPrefix);
+
+            SuggestionStore.addSuggestions(suggestionId, publicChannelNames, publicChannels, SearchChannelSuggestion);
+            SuggestionStore.addSuggestions(suggestionId, privateChannelNames, privateChannels, SearchChannelSuggestion);
+        }
+    }
+}
+
+export default new SearchChannelProvider();

web/react/components/search_user_provider.jsx

@@ -0,0 +1,64 @@
+// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import SuggestionStore from '../stores/suggestion_store.jsx';
+import UserStore from '../stores/user_store.jsx';
+
+class SearchUserSuggestion extends React.Component {
+    render() {
+        const {item, isSelection, onClick} = this.props;
+
+        let className = 'search-autocomplete__item';
+        if (isSelection) {
+            className += ' selected';
+        }
+
+        return (
+            <div
+                className={className}
+                onClick={onClick}
+            >
+                <img
+                    className='profile-img rounded'
+                    src={'/api/v1/users/' + item.id + '/image?time=' + item.update_at}
+                />
+                {item.username}
+            </div>
+        );
+    }
+}
+
+SearchUserSuggestion.propTypes = {
+    item: React.PropTypes.object.isRequired,
+    isSelection: React.PropTypes.bool,
+    onClick: React.PropTypes.func
+};
+
+class SearchUserProvider {
+    handlePretextChanged(suggestionId, pretext) {
+        const captured = (/\bfrom:\s*(\S*)$/i).exec(pretext);
+        if (captured) {
+            const usernamePrefix = captured[1];
+
+            const users = UserStore.getProfiles();
+            let filtered = [];
+
+            for (const id of Object.keys(users)) {
+                const user = users[id];
+
+                if (user.username.startsWith(usernamePrefix)) {
+                    filtered.push(user);
+                }
+            }
+
+            filtered = filtered.sort((a, b) => a.username.localeCompare(b.username));
+
+            const usernames = filtered.map((user) => user.username);
+
+            SuggestionStore.setMatchedPretext(suggestionId, usernamePrefix);
+            SuggestionStore.addSuggestions(suggestionId, usernames, filtered, SearchUserSuggestion);
+        }
+    }
+}
+
+export default new SearchUserProvider();

web/react/components/suggestion_box.jsx

@@ -0,0 +1,170 @@
+// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import AppDispatcher from '../dispatcher/app_dispatcher.jsx';
+import Constants from '../utils/constants.jsx';
+import SuggestionList from './suggestion_list.jsx';
+import SuggestionStore from '../stores/suggestion_store.jsx';
+import * as Utils from '../utils/utils.jsx';
+
+const ActionTypes = Constants.ActionTypes;
+const KeyCodes = Constants.KeyCodes;
+
+export default class SuggestionBox extends React.Component {
+    constructor(props) {
+        super(props);
+
+        this.handleDocumentClick = this.handleDocumentClick.bind(this);
+        this.handleFocus = this.handleFocus.bind(this);
+
+        this.handleChange = this.handleChange.bind(this);
+        this.handleCompleteWord = this.handleCompleteWord.bind(this);
+        this.handleKeyDown = this.handleKeyDown.bind(this);
+        this.handlePretextChanged = this.handlePretextChanged.bind(this);
+
+        this.suggestionId = Utils.generateId();
+
+        this.state = {
+            focused: false
+        };
+    }
+
+    componentDidMount() {
+        SuggestionStore.registerSuggestionBox(this.suggestionId);
+        $(document).on('click', this.handleDocumentClick);
+
+        SuggestionStore.addCompleteWordListener(this.suggestionId, this.handleCompleteWord);
+        SuggestionStore.addPretextChangedListener(this.suggestionId, this.handlePretextChanged);
+    }
+
+    componentWillUnmount() {
+        SuggestionStore.removeCompleteWordListener(this.suggestionId, this.handleCompleteWord);
+        SuggestionStore.removePretextChangedListener(this.suggestionId, this.handlePretextChanged);
+
+        SuggestionStore.unregisterSuggestionBox(this.suggestionId);
+        $(document).off('click', this.handleDocumentClick);
+    }
+
+    handleDocumentClick(e) {
+        if (!this.state.focused) {
+            return;
+        }
+
+        const container = $(ReactDOM.findDOMNode(this));
+        if (!(container.is(e.target) || container.has(e.target).length > 0)) {
+            // we can't just use blur for this because it fires and hides the children before
+            // their click handlers can be called
+            this.setState({
+                focused: false
+            });
+        }
+    }
+
+    handleFocus() {
+        this.setState({
+            focused: true
+        });
+
+        if (this.props.onFocus) {
+            this.props.onFocus();
+        }
+    }
+
+    handleChange(e) {
+        const textbox = ReactDOM.findDOMNode(this.refs.textbox);
+        const caret = Utils.getCaretPosition(textbox);
+        const pretext = textbox.value.substring(0, caret);
+
+        AppDispatcher.handleViewAction({
+            type: ActionTypes.SUGGESTION_PRETEXT_CHANGED,
+            id: this.suggestionId,
+            pretext
+        });
+
+        if (this.props.onUserInput) {
+            this.props.onUserInput(textbox.value);
+        }
+
+        if (this.props.onChange) {
+            this.props.onChange(e);
+        }
+    }
+
+    handleCompleteWord(term) {
+        const textbox = ReactDOM.findDOMNode(this.refs.textbox);
+        const caret = Utils.getCaretPosition(textbox);
+
+        const text = this.props.value;
+        const prefix = text.substring(0, caret - SuggestionStore.getMatchedPretext(this.suggestionId).length);
+        const suffix = text.substring(caret);
+
+        if (this.props.onUserInput) {
+            this.props.onUserInput(prefix + term + ' ' + suffix);
+        }
+
+        // set the caret position after the next rendering
+        window.requestAnimationFrame(() => {
+            Utils.setCaretPosition(textbox, prefix.length + term.length + 1);
+        });
+    }
+
+    handleKeyDown(e) {
+        if (e.which === KeyCodes.UP) {
+            AppDispatcher.handleViewAction({
+                type: ActionTypes.SUGGESTION_SELECT_PREVIOUS,
+                id: this.suggestionId
+            });
+            e.preventDefault();
+        } else if (e.which === KeyCodes.DOWN) {
+            AppDispatcher.handleViewAction({
+                type: ActionTypes.SUGGESTION_SELECT_NEXT,
+                id: this.suggestionId
+            });
+            e.preventDefault();
+        } else if ((e.which === KeyCodes.SPACE || e.which === KeyCodes.ENTER) && SuggestionStore.hasSuggestions(this.suggestionId)) {
+            AppDispatcher.handleViewAction({
+                type: ActionTypes.SUGGESTION_COMPLETE_WORD,
+                id: this.suggestionId
+            });
+            e.preventDefault();
+        } else if (this.props.onKeyDown) {
+            this.props.onKeyDown(e);
+        }
+    }
+
+    handlePretextChanged(pretext) {
+        for (const provider of this.props.providers) {
+            provider.handlePretextChanged(this.suggestionId, pretext);
+        }
+    }
+
+    render() {
+        const newProps = Object.assign({}, this.props, {
+            onFocus: this.handleFocus,
+            onChange: this.handleChange,
+            onKeyDown: this.handleKeyDown
+        });
+
+        return (
+            <div>
+                <input
+                    ref='textbox'
+                    type='text'
+                    {...newProps}
+                />
+                <SuggestionList suggestionId={this.suggestionId} />
+            </div>
+        );
+    }
+}
+
+SuggestionBox.propTypes = {
+    value: React.PropTypes.string.isRequired,
+    onUserInput: React.PropTypes.func,
+    providers: React.PropTypes.arrayOf(React.PropTypes.object),
+
+    // explicitly name any input event handlers we override and need to manually call
+    onChange: React.PropTypes.func,
+    onKeyDown: React.PropTypes.func,
+    onFocus: React.PropTypes.func
+};

web/react/components/suggestion_list.jsx

@@ -0,0 +1,157 @@
+// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import AppDispatcher from '../dispatcher/app_dispatcher.jsx';
+import Constants from '../utils/constants.jsx';
+import SuggestionStore from '../stores/suggestion_store.jsx';
+import * as Utils from '../utils/utils.jsx';
+
+export default class SuggestionList extends React.Component {
+    constructor(props) {
+        super(props);
+
+        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);
+    }
+
+    componentDidUpdate(prevProps, prevState) {
+        if (this.state.items.length > 0 && prevState.items.length === 0) {
+            const content = $(ReactDOM.findDOMNode(this.refs.popover)).find('.popover-content');
+            content.perfectScrollbar();
+        }
+    }
+
+    componentWillUnmount() {
+        SuggestionStore.removeSuggestionsChangedListener(this.props.suggestionId, this.handleSuggestionsChanged);
+    }
+
+    handleItemClick(term, e) {
+        AppDispatcher.handleViewAction({
+            type: Constants.ActionTypes.SUGGESTION_COMPLETE_WORD,
+            id: 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 = $(ReactDOM.findDOMNode(this.refs.popover)).find('.popover-content');
+        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 itemBottom = item[0].offsetTop + item.height() + parseInt(item.css('margin-bottom'), 10);
+
+            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);
+            }
+        }
+    }
+
+    renderChannelDivider(type) {
+        let text;
+        if (type === Constants.OPEN_CHANNEL) {
+            text = 'Public ' + Utils.getChannelTerm(type) + 's';
+        } else {
+            text = 'Private ' + Utils.getChannelTerm(type) + 's';
+        }
+
+        return (
+            <div
+                key={type + '-divider'}
+                className='search-autocomplete__divider'
+            >
+                <span>{text}</span>
+            </div>
+        );
+    }
+
+    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];
+
+            // temporary hack to add dividers between public and private channels in the search suggestion list
+            if (i === 0 || item.type !== this.state.items[i - 1].type) {
+                if (item.type === Constants.OPEN_CHANNEL) {
+                    items.push(this.renderChannelDivider(Constants.OPEN_CHANNEL));
+                } else if (item.type === Constants.PRIVATE_CHANNEL) {
+                    items.push(this.renderChannelDivider(Constants.PRIVATE_CHANNEL));
+                }
+            }
+
+            items.push(
+                <Component
+                    key={term}
+                    ref={term}
+                    item={item}
+                    isSelection={isSelection}
+                    onClick={this.handleItemClick.bind(this, term)}
+                />
+            );
+        }
+
+        return (
+            <ReactBootstrap.Popover
+                ref='popover'
+                id='search-autocomplete__popover'
+                className='search-help-popover autocomplete visible'
+                placement='bottom'
+            >
+                {items}
+            </ReactBootstrap.Popover>
+        );
+    }
+}
+
+SuggestionList.propTypes = {
+    suggestionId: React.PropTypes.string.isRequired
+};

web/react/stores/suggestion_store.jsx

@@ -0,0 +1,246 @@
+// Copyright (c) 2015 Mattermost, Inc. All Rights Reserved.
+// See License.txt for license information.
+
+import AppDispatcher from '../dispatcher/app_dispatcher.jsx';
+import Constants from '../utils/constants.jsx';
+import EventEmitter from 'events';
+
+const ActionTypes = Constants.ActionTypes;
+
+const COMPLETE_WORD_EVENT = 'complete_word';
+const PRETEXT_CHANGED_EVENT = 'pretext_changed';
+const SUGGESTIONS_CHANGED_EVENT = 'suggestions_changed';
+
+class SuggestionStore extends EventEmitter {
+    constructor() {
+        super();
+
+        this.addSuggestionsChangedListener = this.addSuggestionsChangedListener.bind(this);
+        this.removeSuggestionsChangedListener = this.removeSuggestionsChangedListener.bind(this);
+        this.emitSuggestionsChanged = this.emitSuggestionsChanged.bind(this);
+
+        this.addPretextChangedListener = this.addPretextChangedListener.bind(this);
+        this.removePretextChangedListener = this.removePretextChangedListener.bind(this);
+        this.emitPretextChanged = this.emitPretextChanged.bind(this);
+
+        this.addCompleteWordListener = this.addCompleteWordListener.bind(this);
+        this.removeCompleteWordListener = this.removeCompleteWordListener.bind(this);
+        this.emitCompleteWord = this.emitCompleteWord.bind(this);
+
+        this.handleEventPayload = this.handleEventPayload.bind(this);
+        this.dispatchToken = AppDispatcher.register(this.handleEventPayload);
+
+        // this.suggestions stores the state of all SuggestionBoxes by mapping their unique identifier to an
+        // object with the following fields:
+        // pretext: the text before the cursor
+        // matchedPretext: the text before the cursor that will be replaced if an autocomplete term is selected
+        // terms: a list of strings which the previously typed text may be replaced by
+        // items: a list of objects backing the terms which may be used in rendering
+        // components: a list of react components that can be used to render their corresponding item
+        // selection: the term currently selected by the keyboard
+        this.suggestions = new Map();
+    }
+
+    addSuggestionsChangedListener(id, callback) {
+        this.on(SUGGESTIONS_CHANGED_EVENT + id, callback);
+    }
+    removeSuggestionsChangedListener(id, callback) {
+        this.removeListener(SUGGESTIONS_CHANGED_EVENT + id, callback);
+    }
+    emitSuggestionsChanged(id) {
+        this.emit(SUGGESTIONS_CHANGED_EVENT + id);
+    }
+
+    addPretextChangedListener(id, callback) {
+        this.on(PRETEXT_CHANGED_EVENT + id, callback);
+    }
+    removePretextChangedListener(id, callback) {
+        this.removeListener(PRETEXT_CHANGED_EVENT + id, callback);
+    }
+    emitPretextChanged(id, pretext) {
+        this.emit(PRETEXT_CHANGED_EVENT + id, pretext);
+    }
+
+    addCompleteWordListener(id, callback) {
+        this.on(COMPLETE_WORD_EVENT + id, callback);
+    }
+    removeCompleteWordListener(id, callback) {
+        this.removeListener(COMPLETE_WORD_EVENT + id, callback);
+    }
+    emitCompleteWord(id, term) {
+        this.emit(COMPLETE_WORD_EVENT + id, term);
+    }
+
+    registerSuggestionBox(id) {
+        this.suggestions.set(id, {
+            pretext: '',
+            matchedPretext: '',
+            terms: [],
+            items: [],
+            components: [],
+            selection: ''
+        });
+    }
+
+    unregisterSuggestionBox(id) {
+        this.suggestions.delete(id);
+    }
+
+    clearSuggestions(id) {
+        const suggestion = this.suggestions.get(id);
+
+        suggestion.matchedPretext = '';
+        suggestion.terms = [];
+        suggestion.items = [];
+        suggestion.components = [];
+        suggestion.selection = '';
+    }
+
+    hasSuggestions(id) {
+        return this.suggestions.get(id).terms.length > 0;
+    }
+
+    setPretext(id, pretext) {
+        const suggestion = this.suggestions.get(id);
+
+        suggestion.pretext = pretext;
+    }
+
+    setMatchedPretext(id, matchedPretext) {
+        const suggestion = this.suggestions.get(id);
+
+        suggestion.matchedPretext = matchedPretext;
+    }
+
+    addSuggestion(id, term, item, component) {
+        const suggestion = this.suggestions.get(id);
+
+        suggestion.terms.push(term);
+        suggestion.items.push(item);
+        suggestion.components.push(component);
+    }
+
+    addSuggestions(id, terms, items, component) {
+        const suggestion = this.suggestions.get(id);
+
+        suggestion.terms.push(...terms);
+        suggestion.items.push(...items);
+
+        for (let i = 0; i < terms.length; i++) {
+            suggestion.components.push(component);
+        }
+    }
+
+    // make sure that if suggestions exist, then one of them is selected. return true if the selection changes.
+    ensureSelectionExists(id) {
+        const suggestion = this.suggestions.get(id);
+
+        if (suggestion.terms.length > 0) {
+            // if the current selection is no longer in the map, select the first term in the list
+            if (!suggestion.selection || suggestion.terms.indexOf(suggestion.selection) === -1) {
+                suggestion.selection = suggestion.terms[0];
+
+                return true;
+            }
+        } else if (suggestion.selection) {
+            suggestion.selection = '';
+
+            return true;
+        }
+
+        return false;
+    }
+
+    getPretext(id) {
+        return this.suggestions.get(id).pretext;
+    }
+
+    getMatchedPretext(id) {
+        return this.suggestions.get(id).matchedPretext;
+    }
+
+    getItems(id) {
+        return this.suggestions.get(id).items;
+    }
+
+    getTerms(id) {
+        return this.suggestions.get(id).terms;
+    }
+
+    getComponents(id) {
+        return this.suggestions.get(id).components;
+    }
+
+    getSelection(id) {
+        return this.suggestions.get(id).selection;
+    }
+
+    selectNext(id) {
+        this.setSelectionByDelta(id, 1);
+    }
+
+    selectPrevious(id) {
+        this.setSelectionByDelta(id, -1);
+    }
+
+    setSelectionByDelta(id, delta) {
+        const suggestion = this.suggestions.get(id);
+
+        let selectionIndex = suggestion.terms.indexOf(suggestion.selection);
+
+        if (selectionIndex === -1) {
+            // this should never happen since selection should always be in terms
+            throw new Error('selection is not in terms');
+        }
+
+        selectionIndex += delta;
+
+        if (selectionIndex < 0) {
+            selectionIndex = 0;
+        } else if (selectionIndex > suggestion.terms.length - 1) {
+            selectionIndex = suggestion.terms.length - 1;
+        }
+
+        suggestion.selection = suggestion.terms[selectionIndex];
+    }
+
+    handleEventPayload(payload) {
+        const {type, id, ...other} = payload.action; // eslint-disable-line no-redeclare
+
+        switch (type) {
+        case ActionTypes.SUGGESTION_PRETEXT_CHANGED:
+            this.clearSuggestions(id);
+
+            this.setPretext(id, other.pretext);
+            this.emitPretextChanged(id, other.pretext);
+
+            this.ensureSelectionExists(id);
+            this.emitSuggestionsChanged(id);
+            break;
+        case ActionTypes.SUGGESTION_RECEIVED_SUGGESTIONS:
+            this.setMatchedPretext(id, other.matchedPretext);
+            this.addSuggestions(id, other.terms, other.items, other.componentType);
+
+            this.ensureSelectionExists(id);
+            this.emitSuggestionsChanged(id);
+            break;
+        case ActionTypes.SUGGESTION_SELECT_NEXT:
+            this.selectNext(id);
+            this.emitSuggestionsChanged(id);
+            break;
+        case ActionTypes.SUGGESTION_SELECT_PREVIOUS:
+            this.selectPrevious(id);
+            this.emitSuggestionsChanged(id);
+            break;
+        case ActionTypes.SUGGESTION_COMPLETE_WORD:
+            this.emitCompleteWord(id, other.term || this.getSelection(id), this.getMatchedPretext(id));
+
+            this.setPretext(id, '');
+            this.clearSuggestions(id);
+            this.emitSuggestionsChanged(id);
+            break;
+        }
+    }
+}
+
+export default new SuggestionStore();

web/react/utils/constants.jsx

@@ -24,6 +24,7 @@ export default {
         RECIEVED_POST: null,
         RECIEVED_EDIT_POST: null,
         RECIEVED_SEARCH: null,
+        RECIEVED_SEARCH_TERM: null,
         RECIEVED_POST_SELECTED: null,
         RECIEVED_MENTION_DATA: null,
         RECIEVED_ADD_MENTION: null,
@@ -50,7 +51,13 @@ export default {
         TOGGLE_INVITE_MEMBER_MODAL: null,
         TOGGLE_DELETE_POST_MODAL: null,
         TOGGLE_GET_TEAM_INVITE_LINK_MODAL: null,
-        TOGGLE_REGISTER_APP_MODAL: null
+        TOGGLE_REGISTER_APP_MODAL: null,
+
+        SUGGESTION_PRETEXT_CHANGED: null,
+        SUGGESTION_RECEIVED_SUGGESTIONS: null,
+        SUGGESTION_COMPLETE_WORD: null,
+        SUGGESTION_SELECT_NEXT: null,
+        SUGGESTION_SELECT_PREVIOUS: null
     }),
 
     PayloadSources: keyMirror({

web/sass-files/sass/partials/_popover.scss

@@ -94,6 +94,8 @@
     }
 
     .popover-content {
+        max-height: 500px;
+        overflow: auto;
         padding: 3px 13px;
     }