BACAT Scrolling

res/css/_components.scss

@@ -19,6 +19,7 @@
 @import "./structures/_RoomStatusBar.scss";
 @import "./structures/_RoomSubList.scss";
 @import "./structures/_RoomView.scss";
+@import "./structures/_ScrollPanel.scss";
 @import "./structures/_SearchBox.scss";
 @import "./structures/_TabbedView.scss";
 @import "./structures/_TagPanel.scss";

res/css/structures/_MainSplit.scss

@@ -19,3 +19,9 @@ limitations under the License.
     flex-direction: row;
     min-width: 0;
 }
+
+// move hit area 5px to the right so it doesn't overlap with the timeline scrollbar
+.mx_MainSplit > .mx_ResizeHandle.mx_ResizeHandle_horizontal {
+    margin: 0 -10px 0 0;
+    padding: 0 10px 0 0;
+}

res/css/structures/_RoomView.scss

@@ -84,6 +84,7 @@ limitations under the License.
     display: flex;
     flex-direction: column;
     flex: 1;
+    min-width: 0;
 }
 
 .mx_RoomView_body .mx_RoomView_timeline {
@@ -111,6 +112,8 @@ limitations under the License.
 .mx_RoomView_messagePanel {
     width: 100%;
     overflow-y: auto;
+    flex: 1 1 0;
+    overflow-anchor: none;
 }
 
 .mx_RoomView_messagePanelSearchSpinner {

res/css/structures/_ScrollPanel.scss

@@ -0,0 +1,26 @@
+/*
+Copyright 2019 New Vector Ltd
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+.mx_ScrollPanel {
+
+    .mx_RoomView_MessageList {
+        position: relative;
+        display: flex;
+        flex-direction: column;
+        justify-content: flex-end;
+        overflow-y: hidden;
+    }
+}

res/css/views/rooms/_MemberList.scss

@@ -20,6 +20,7 @@ limitations under the License.
     flex: 1;
     display: flex;
     flex-direction: column;
+    min-height: 0;
 
     .mx_Spinner {
         flex: 1 0 auto;
@@ -35,6 +36,10 @@ limitations under the License.
         margin-top: 8px;
         margin-bottom: 4px;
     }
+
+    .mx_AutoHideScrollbar {
+        flex: 1 1 0;
+    }
 }
 
 .mx_MemberList_chevron {

src/Notifier.js

@@ -220,7 +220,17 @@ const Notifier = {
         }
     },
 
-    isToolbarHidden: function() {
+    shouldShowToolbar: function() {
+        const client = MatrixClientPeg.get();
+        if (!client) {
+            return false;
+        }
+        const isGuest = client.isGuest();
+        return !isGuest && Notifier.supportsDesktopNotifications() &&
+            !Notifier.isEnabled() && !Notifier._isToolbarHidden();
+    },
+
+    _isToolbarHidden: function() {
         // Check localStorage for any such meta data
         if (global.localStorage) {
             return global.localStorage.getItem("notifications_hidden") === "true";

src/components/structures/AutoHideScrollbar.js

@@ -121,6 +121,7 @@ export default class AutoHideScrollbar extends React.Component {
     render() {
         return (<div
                     ref={this._collectContainerRef}
+                    style={this.props.style}
                     className={["mx_AutoHideScrollbar", this.props.className].join(" ")}
                     onScroll={this.props.onScroll}
                 >

src/components/structures/FilePanel.js

@@ -123,6 +123,7 @@ const FilePanel = React.createClass({
                     timelineSet={this.state.timelineSet}
                     showUrlPreview = {false}
                     tileShape="file_grid"
+                    resizeNotifier={this.props.resizeNotifier}
                     empty={_t('There are no visible files in this room')}
                 />
             );

src/components/structures/LeftPanel.js

@@ -234,7 +234,7 @@ const LeftPanel = React.createClass({
                     <CallPreview ConferenceHandler={VectorConferenceHandler} />
                     <RoomList
                         ref={this.collectRoomList}
-                        toolbarShown={this.props.toolbarShown}
+                        resizeNotifier={this.props.resizeNotifier}
                         collapsed={this.props.collapsed}
                         searchFilter={this.state.searchFilter}
                         ConferenceHandler={VectorConferenceHandler} />

src/components/structures/LoggedInView.js

@@ -22,7 +22,6 @@ import PropTypes from 'prop-types';
 import { DragDropContext } from 'react-beautiful-dnd';
 
 import { KeyCode, isOnlyCtrlOrCmdKeyEvent } from '../../Keyboard';
-import Notifier from '../../Notifier';
 import PageTypes from '../../PageTypes';
 import CallMediaHandler from '../../CallMediaHandler';
 import sdk from '../../index';
@@ -121,6 +120,18 @@ const LoggedInView = React.createClass({
         this._matrixClient.on("RoomState.events", this.onRoomStateEvents);
     },
 
+    componentDidUpdate(prevProps) {
+        // attempt to guess when a banner was opened or closed
+        if (
+            (prevProps.showCookieBar !== this.props.showCookieBar) ||
+            (prevProps.hasNewVersion !== this.props.hasNewVersion) ||
+            (prevProps.userHasGeneratedPassword !== this.props.userHasGeneratedPassword) ||
+            (prevProps.showNotifierToolbar !== this.props.showNotifierToolbar)
+        ) {
+            this.props.resizeNotifier.notifyBannersChanged();
+        }
+    },
+
     componentWillUnmount: function() {
         document.removeEventListener('keydown', this._onKeyDown);
         this._matrixClient.removeListener("accountData", this.onAccountData);
@@ -173,6 +184,7 @@ const LoggedInView = React.createClass({
             },
             onResized: (size) => {
                 window.localStorage.setItem("mx_lhs_size", '' + size);
+                this.props.resizeNotifier.notifyLeftHandleResized();
             },
         };
         const resizer = new Resizer(
@@ -448,6 +460,7 @@ const LoggedInView = React.createClass({
                         disabled={this.props.middleDisabled}
                         collapsedRhs={this.props.collapsedRhs}
                         ConferenceHandler={this.props.ConferenceHandler}
+                        resizeNotifier={this.props.resizeNotifier}
                     />;
                 break;
 
@@ -489,7 +502,6 @@ const LoggedInView = React.createClass({
         });
 
         let topBar;
-        const isGuest = this.props.matrixClient.isGuest();
         if (this.state.syncErrorData && this.state.syncErrorData.error.errcode === 'M_RESOURCE_LIMIT_EXCEEDED') {
             topBar = <ServerLimitBar kind='hard'
                 adminContact={this.state.syncErrorData.error.data.admin_contact}
@@ -513,10 +525,7 @@ const LoggedInView = React.createClass({
             topBar = <UpdateCheckBar {...this.props.checkingForUpdate} />;
         } else if (this.state.userHasGeneratedPassword) {
             topBar = <PasswordNagBar />;
-        } else if (
-            !isGuest && Notifier.supportsDesktopNotifications() &&
-            !Notifier.isEnabled() && !Notifier.isToolbarHidden()
-        ) {
+        } else if (this.props.showNotifierToolbar) {
             topBar = <MatrixToolbar />;
         }
 
@@ -534,7 +543,7 @@ const LoggedInView = React.createClass({
                 <DragDropContext onDragEnd={this._onDragEnd}>
                     <div ref={this._setResizeContainerRef} className={bodyClasses}>
                         <LeftPanel
-                            toolbarShown={!!topBar}
+                            resizeNotifier={this.props.resizeNotifier}
                             collapsed={this.props.collapseLhs || false}
                             disabled={this.props.leftDisabled}
                         />

src/components/structures/MainSplit.js

@@ -27,6 +27,9 @@ export default class MainSplit extends React.Component {
 
     _onResized(size) {
         window.localStorage.setItem("mx_rhs_size", size);
+        if (this.props.resizeNotifier) {
+            this.props.resizeNotifier.notifyRightHandleResized();
+        }
     }
 
     _createResizer() {

src/components/structures/MatrixChat.js

@@ -29,6 +29,7 @@ import PlatformPeg from "../../PlatformPeg";
 import SdkConfig from "../../SdkConfig";
 import * as RoomListSorter from "../../RoomListSorter";
 import dis from "../../dispatcher";
+import Notifier from '../../Notifier';
 
 import Modal from "../../Modal";
 import Tinter from "../../Tinter";
@@ -48,6 +49,7 @@ import { _t, getCurrentLanguage } from '../../languageHandler';
 import SettingsStore, {SettingLevel} from "../../settings/SettingsStore";
 import { startAnyRegistrationFlow } from "../../Registration.js";
 import { messageForSyncError } from '../../utils/ErrorUtils';
+import ResizeNotifier from "../../utils/ResizeNotifier";
 import TimelineExplosionDialog from "../views/dialogs/TimelineExplosionDialog";
 
 const AutoDiscovery = Matrix.AutoDiscovery;
@@ -195,6 +197,8 @@ export default React.createClass({
             hideToSRUsers: false,
 
             syncError: null, // If the current syncing status is ERROR, the error object, otherwise null.
+            resizeNotifier: new ResizeNotifier(),
+            showNotifierToolbar: Notifier.shouldShowToolbar(),
         };
         return s;
     },
@@ -317,6 +321,9 @@ export default React.createClass({
         // N.B. we don't call the whole of setTheme() here as we may be
         // racing with the theme CSS download finishing from index.js
         Tinter.tint();
+
+        // For PersistentElement
+        this.state.resizeNotifier.on("middlePanelResized", this._dispatchTimelineResize);
     },
 
     componentDidMount: function() {
@@ -399,6 +406,7 @@ export default React.createClass({
         dis.unregister(this.dispatcherRef);
         window.removeEventListener("focus", this.onFocus);
         window.removeEventListener('resize', this.handleResize);
+        this.state.resizeNotifier.removeListener("middlePanelResized", this._dispatchTimelineResize);
     },
 
     componentWillUpdate: function(props, state) {
@@ -639,8 +647,9 @@ export default React.createClass({
             case 'view_invite':
                 showRoomInviteDialog(payload.roomId);
                 break;
-            case 'notifier_enabled':
-                this.forceUpdate();
+            case 'notifier_enabled': {
+                    this.setState({showNotifierToolbar: Notifier.shouldShowToolbar()});
+                }
                 break;
             case 'hide_left_panel':
                 this.setState({
@@ -1189,6 +1198,7 @@ export default React.createClass({
      */
     _onLoggedIn: async function() {
         this.setStateForNewView({view: VIEWS.LOGGED_IN});
+        this.setState({showNotifierToolbar: Notifier.shouldShowToolbar()});
         if (this._is_registered) {
             this._is_registered = false;
 
@@ -1687,9 +1697,17 @@ export default React.createClass({
             dis.dispatch({ action: 'show_right_panel' });
         }
 
+        this.state.resizeNotifier.notifyWindowResized();
         this._windowWidth = window.innerWidth;
     },
 
+    _dispatchTimelineResize() {
+        // prevent dispatch from within dispatch error
+        setTimeout(() => {
+            dis.dispatch({ action: 'timeline_resize' }, true);
+        }, 0);
+    },
+
     onRoomCreated: function(roomId) {
         dis.dispatch({
             action: "view_room",

src/components/structures/MessagePanel.js

@@ -21,7 +21,6 @@ import PropTypes from 'prop-types';
 import classNames from 'classnames';
 import shouldHideEvent from '../../shouldHideEvent';
 import {wantsDateSeparator} from '../../DateUtils';
-import dis from "../../dispatcher";
 import sdk from '../../index';
 
 import MatrixClientPeg from '../../MatrixClientPeg';
@@ -628,16 +627,29 @@ module.exports = React.createClass({
     _onHeightChanged: function() {
         const scrollPanel = this.refs.scrollPanel;
         if (scrollPanel) {
-            scrollPanel.forceUpdate();
+            scrollPanel.checkScroll();
         }
     },
 
-    _onTypingVisible: function() {
+    _onTypingShown: function() {
         const scrollPanel = this.refs.scrollPanel;
+        // this will make the timeline grow, so checkScroll
+        scrollPanel.checkScroll();
         if (scrollPanel && scrollPanel.getScrollState().stuckAtBottom) {
-            // scroll down if at bottom
+            scrollPanel.preventShrinking();
+        }
+    },
+
+    _onTypingHidden: function() {
+        const scrollPanel = this.refs.scrollPanel;
+        if (scrollPanel) {
+            // as hiding the typing notifications doesn't
+            // update the scrollPanel, we tell it to apply
+            // the shrinking prevention once the typing notifs are hidden
+            scrollPanel.updatePreventShrinking();
+            // order is important here as checkScroll will scroll down to
+            // reveal added padding to balance the notifs disappearing.
             scrollPanel.checkScroll();
-            scrollPanel.blockShrinking();
         }
     },
 
@@ -653,22 +665,18 @@ module.exports = React.createClass({
             // update the min-height, so once the last
             // person stops typing, no jumping occurs
             if (isAtBottom && isTypingVisible) {
-                scrollPanel.blockShrinking();
+                scrollPanel.preventShrinking();
             }
         }
     },
 
-    clearTimelineHeight: function() {
+    onTimelineReset: function() {
         const scrollPanel = this.refs.scrollPanel;
         if (scrollPanel) {
-            scrollPanel.clearBlockShrinking();
+            scrollPanel.clearPreventShrinking();
         }
     },
 
-    onResize: function() {
-        dis.dispatch({ action: 'timeline_resize' }, true);
-    },
-
     render: function() {
         const ScrollPanel = sdk.getComponent("structures.ScrollPanel");
         const WhoIsTypingTile = sdk.getComponent("rooms.WhoIsTypingTile");
@@ -693,7 +701,12 @@ module.exports = React.createClass({
 
         let whoIsTyping;
         if (this.props.room) {
-            whoIsTyping = (<WhoIsTypingTile room={this.props.room} onVisible={this._onTypingVisible} ref="whoIsTyping" />);
+            whoIsTyping = (<WhoIsTypingTile
+                room={this.props.room}
+                onShown={this._onTypingShown}
+                onHidden={this._onTypingHidden}
+                ref="whoIsTyping" />
+            );
         }
 
         return (
@@ -703,7 +716,8 @@ module.exports = React.createClass({
                     onFillRequest={this.props.onFillRequest}
                     onUnfillRequest={this.props.onUnfillRequest}
                     style={style}
-                    stickyBottom={this.props.stickyBottom}>
+                    stickyBottom={this.props.stickyBottom}
+                    resizeNotifier={this.props.resizeNotifier}>
                 { topSpinner }
                 { this._getEventTiles() }
                 { whoIsTyping }

src/components/structures/RightPanel.js

@@ -193,7 +193,7 @@ export default class RightPanel extends React.Component {
         } else if (this.state.phase === RightPanel.Phase.NotificationPanel) {
             panel = <NotificationPanel />;
         } else if (this.state.phase === RightPanel.Phase.FilePanel) {
-            panel = <FilePanel roomId={this.props.roomId} />;
+            panel = <FilePanel roomId={this.props.roomId} resizeNotifier={this.props.resizeNotifier} />;
         }
 
         const classes = classNames("mx_RightPanel", "mx_fadable", {

src/components/structures/RoomDirectory.js

@@ -551,7 +551,6 @@ module.exports = React.createClass({
                 onFillRequest={ this.onFillRequest }
                 stickyBottom={false}
                 startAtBottom={false}
-                onResize={function() {}}
             >
                 { scrollpanel_content }
             </ScrollPanel>;