mirror of
https://github.com/element-hq/element-web.git
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506 lines
17 KiB
JavaScript
506 lines
17 KiB
JavaScript
/*
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Copyright 2016 OpenMarket Ltd
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Licensed under the Apache License, Version 2.0 (the "License");
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you may not use this file except in compliance with the License.
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You may obtain a copy of the License at
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http://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing, software
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distributed under the License is distributed on an "AS IS" BASIS,
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WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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See the License for the specific language governing permissions and
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limitations under the License.
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*/
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var React = require('react');
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var ReactDOM = require("react-dom");
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var dis = require("../../dispatcher");
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var sdk = require('../../index');
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var MatrixClientPeg = require('../../MatrixClientPeg')
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/* (almost) stateless UI component which builds the event tiles in the room timeline.
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*/
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module.exports = React.createClass({
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displayName: 'MessagePanel',
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propTypes: {
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// true to give the component a 'display: none' style.
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hidden: React.PropTypes.bool,
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// true to show a spinner at the top of the timeline to indicate
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// back-pagination in progress
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backPaginating: React.PropTypes.bool,
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// true to show a spinner at the end of the timeline to indicate
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// forward-pagination in progress
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forwardPaginating: React.PropTypes.bool,
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// the list of MatrixEvents to display
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events: React.PropTypes.array.isRequired,
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// ID of an event to highlight. If undefined, no event will be highlighted.
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highlightedEventId: React.PropTypes.string,
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// Should we show URL Previews
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showUrlPreview: React.PropTypes.bool,
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// event after which we should show a read marker
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readMarkerEventId: React.PropTypes.string,
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// whether the read marker should be visible
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readMarkerVisible: React.PropTypes.bool,
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// the userid of our user. This is used to suppress the read marker
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// for pending messages.
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ourUserId: React.PropTypes.string,
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// true to suppress the date at the start of the timeline
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suppressFirstDateSeparator: React.PropTypes.bool,
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// true if updates to the event list should cause the scroll panel to
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// scroll down when we are at the bottom of the window. See ScrollPanel
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// for more details.
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stickyBottom: React.PropTypes.bool,
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// callback which is called when the panel is scrolled.
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onScroll: React.PropTypes.func,
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// callback which is called when more content is needed.
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onFillRequest: React.PropTypes.func,
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// opacity for dynamic UI fading effects
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opacity: React.PropTypes.number,
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},
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componentWillMount: function() {
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// the event after which we put a visible unread marker on the last
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// render cycle; null if readMarkerVisible was false or the RM was
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// suppressed (eg because it was at the end of the timeline)
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this.currentReadMarkerEventId = null;
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// the event after which we are showing a disappearing read marker
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// animation
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this.currentGhostEventId = null;
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// opaque readreceipt info for each userId; used by ReadReceiptMarker
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// to manage its animations
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this._readReceiptMap = {};
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// Remember the read marker ghost node so we can do the cleanup that
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// Velocity requires
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this._readMarkerGhostNode = null;
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this._isMounted = true;
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},
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componentWillUnmount: function() {
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this._isMounted = false;
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},
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/* get the DOM node representing the given event */
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getNodeForEventId: function(eventId) {
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if (!this.eventNodes) {
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return undefined;
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}
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return this.eventNodes[eventId];
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},
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/* return true if the content is fully scrolled down right now; else false.
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*/
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isAtBottom: function() {
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return this.refs.scrollPanel
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&& this.refs.scrollPanel.isAtBottom();
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},
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/* get the current scroll state. See ScrollPanel.getScrollState for
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* details.
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*
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* returns null if we are not mounted.
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*/
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getScrollState: function() {
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if (!this.refs.scrollPanel) { return null; }
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return this.refs.scrollPanel.getScrollState();
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},
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// returns one of:
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//
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// null: there is no read marker
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// -1: read marker is above the window
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// 0: read marker is within the window
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// +1: read marker is below the window
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getReadMarkerPosition: function() {
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var readMarker = this.refs.readMarkerNode;
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var messageWrapper = this.refs.scrollPanel;
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if (!readMarker || !messageWrapper) {
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return null;
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}
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var wrapperRect = ReactDOM.findDOMNode(messageWrapper).getBoundingClientRect();
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var readMarkerRect = readMarker.getBoundingClientRect();
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// the read-marker pretends to have zero height when it is actually
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// two pixels high; +2 here to account for that.
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if (readMarkerRect.bottom + 2 < wrapperRect.top) {
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return -1;
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} else if (readMarkerRect.top < wrapperRect.bottom) {
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return 0;
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} else {
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return 1;
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}
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},
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/* jump to the top of the content.
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*/
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scrollToTop: function() {
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if (this.refs.scrollPanel) {
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this.refs.scrollPanel.scrollToTop();
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}
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},
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/* jump to the bottom of the content.
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*/
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scrollToBottom: function() {
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if (this.refs.scrollPanel) {
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this.refs.scrollPanel.scrollToBottom();
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}
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},
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/**
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* Page up/down.
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*
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* mult: -1 to page up, +1 to page down
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*/
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scrollRelative: function(mult) {
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if (this.refs.scrollPanel) {
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this.refs.scrollPanel.scrollRelative(mult);
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}
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},
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/**
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* Scroll up/down in response to a scroll key
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*/
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handleScrollKey: function(ev) {
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if (this.refs.scrollPanel) {
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this.refs.scrollPanel.handleScrollKey(ev);
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}
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},
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/* jump to the given event id.
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*
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* offsetBase gives the reference point for the pixelOffset. 0 means the
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* top of the container, 1 means the bottom, and fractional values mean
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* somewhere in the middle. If omitted, it defaults to 0.
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*
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* pixelOffset gives the number of pixels *above* the offsetBase that the
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* node (specifically, the bottom of it) will be positioned. If omitted, it
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* defaults to 0.
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*/
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scrollToEvent: function(eventId, pixelOffset, offsetBase) {
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if (this.refs.scrollPanel) {
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this.refs.scrollPanel.scrollToToken(eventId, pixelOffset, offsetBase);
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}
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},
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/* check the scroll state and send out pagination requests if necessary.
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*/
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checkFillState: function() {
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if (this.refs.scrollPanel) {
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this.refs.scrollPanel.checkFillState();
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}
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},
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_isUnmounting: function() {
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return !this._isMounted;
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},
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_getEventTiles: function() {
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var EventTile = sdk.getComponent('rooms.EventTile');
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this.eventNodes = {};
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var i;
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// first figure out which is the last event in the list which we're
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// actually going to show; this allows us to behave slightly
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// differently for the last event in the list.
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//
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// we also need to figure out which is the last event we show which isn't
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// a local echo, to manage the read-marker.
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var lastShownEventIndex = -1;
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var lastShownNonLocalEchoIndex = -1;
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for (i = this.props.events.length-1; i >= 0; i--) {
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var mxEv = this.props.events[i];
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if (!EventTile.haveTileForEvent(mxEv)) {
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continue;
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}
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if (lastShownEventIndex < 0) {
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lastShownEventIndex = i;
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}
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if (mxEv.status) {
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// this is a local echo
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continue;
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}
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lastShownNonLocalEchoIndex = i;
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break;
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}
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var ret = [];
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var prevEvent = null; // the last event we showed
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// assume there is no read marker until proven otherwise
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var readMarkerVisible = false;
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// if the readmarker has moved, cancel any active ghost.
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if (this.currentReadMarkerEventId && this.props.readMarkerEventId &&
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this.props.readMarkerVisible &&
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this.currentReadMarkerEventId != this.props.readMarkerEventId) {
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this.currentGhostEventId = null;
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}
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for (i = 0; i < this.props.events.length; i++) {
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var mxEv = this.props.events[i];
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var wantTile = true;
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var eventId = mxEv.getId();
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if (!EventTile.haveTileForEvent(mxEv)) {
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wantTile = false;
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}
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var last = (i == lastShownEventIndex);
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if (wantTile) {
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// make sure we unpack the array returned by _getTilesForEvent,
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// otherwise react will auto-generate keys and we will end up
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// replacing all of the DOM elements every time we paginate.
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ret.push(...this._getTilesForEvent(prevEvent, mxEv, last));
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prevEvent = mxEv;
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} else if (!mxEv.status) {
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// if we aren't showing the event, put in a dummy scroll token anyway, so
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// that we can scroll to the right place.
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ret.push(<li key={eventId} data-scroll-token={eventId}/>);
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}
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var isVisibleReadMarker = false;
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if (eventId == this.props.readMarkerEventId) {
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var visible = this.props.readMarkerVisible;
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// if the read marker comes at the end of the timeline (except
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// for local echoes, which are excluded from RMs, because they
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// don't have useful event ids), we don't want to show it, but
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// we still want to create the <li/> for it so that the
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// algorithms which depend on its position on the screen aren't
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// confused.
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if (i >= lastShownNonLocalEchoIndex) {
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visible = false;
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}
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ret.push(this._getReadMarkerTile(visible));
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readMarkerVisible = visible;
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isVisibleReadMarker = visible;
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}
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if (eventId == this.currentGhostEventId) {
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// if we're showing an animation, continue to show it.
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ret.push(this._getReadMarkerGhostTile());
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} else if (!isVisibleReadMarker &&
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eventId == this.currentReadMarkerEventId) {
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// there is currently a read-up-to marker at this point, but no
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// more. Show an animation of it disappearing.
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ret.push(this._getReadMarkerGhostTile());
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this.currentGhostEventId = eventId;
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}
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}
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this.currentReadMarkerEventId = readMarkerVisible ? this.props.readMarkerEventId : null;
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return ret;
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},
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_getTilesForEvent: function(prevEvent, mxEv, last) {
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var EventTile = sdk.getComponent('rooms.EventTile');
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var DateSeparator = sdk.getComponent('messages.DateSeparator');
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var ret = [];
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// is this a continuation of the previous message?
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var continuation = false;
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if (prevEvent !== null && prevEvent.sender && mxEv.sender
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&& mxEv.sender.userId === prevEvent.sender.userId
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&& mxEv.getType() == prevEvent.getType()) {
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continuation = true;
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}
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// local echoes have a fake date, which could even be yesterday. Treat them
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// as 'today' for the date separators.
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var ts1 = mxEv.getTs();
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if (mxEv.status) {
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ts1 = new Date();
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}
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// do we need a date separator since the last event?
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if (this._wantsDateSeparator(prevEvent, ts1)) {
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var dateSeparator = <li key={ts1}><DateSeparator key={ts1} ts={ts1}/></li>;
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ret.push(dateSeparator);
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continuation = false;
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}
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var eventId = mxEv.getId();
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var highlight = (eventId == this.props.highlightedEventId);
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// we can't use local echoes as scroll tokens, because their event IDs change.
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// Local echos have a send "status".
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var scrollToken = mxEv.status ? undefined : eventId;
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var readReceipts = this._getReadReceiptsForEvent(mxEv);
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ret.push(
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<li key={eventId}
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ref={this._collectEventNode.bind(this, eventId)}
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data-scroll-token={scrollToken}>
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<EventTile mxEvent={mxEv} continuation={continuation}
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onWidgetLoad={this._onWidgetLoad}
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readReceipts={readReceipts}
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readReceiptMap={this._readReceiptMap}
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showUrlPreview={this.props.showUrlPreview}
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checkUnmounting={this._isUnmounting}
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eventSendStatus={mxEv.status}
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last={last} isSelectedEvent={highlight}/>
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</li>
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);
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return ret;
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},
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_wantsDateSeparator: function(prevEvent, nextEventTs) {
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if (prevEvent == null) {
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// first event in the panel: depends if we could back-paginate from
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// here.
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return !this.props.suppressFirstDateSeparator;
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}
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return (new Date(prevEvent.getTs()).toDateString()
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!== new Date(nextEventTs).toDateString());
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},
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// get a list of the userids whose read receipts should
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// be shown next to this event
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_getReadReceiptsForEvent: function(event) {
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var myUserId = MatrixClientPeg.get().credentials.userId;
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// get list of read receipts, sorted most recent first
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var room = MatrixClientPeg.get().getRoom(event.getRoomId());
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if (!room) {
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// huh.
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return null;
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}
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return room.getReceiptsForEvent(event).filter(function(r) {
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return r.type === "m.read" && r.userId != myUserId;
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}).sort(function(r1, r2) {
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return r2.data.ts - r1.data.ts;
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}).map(function(r) {
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return room.getMember(r.userId);
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}).filter(function(m) {
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// check that the user is a known room member
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return m;
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});
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},
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_getReadMarkerTile: function(visible) {
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var hr;
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if (visible) {
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hr = <hr className="mx_RoomView_myReadMarker"
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style={{opacity: 1, width: '99%'}}
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/>;
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}
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return (
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<li key="_readupto" ref="readMarkerNode"
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className="mx_RoomView_myReadMarker_container">
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{hr}
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</li>
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);
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},
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_startAnimation: function(ghostNode) {
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if (this._readMarkerGhostNode) {
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Velocity.Utilities.removeData(this._readMarkerGhostNode);
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}
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this._readMarkerGhostNode = ghostNode;
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if (ghostNode) {
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Velocity(ghostNode, {opacity: '0', width: '10%'},
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{duration: 400, easing: 'easeInSine',
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delay: 1000});
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}
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},
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_getReadMarkerGhostTile: function() {
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var hr = <hr className="mx_RoomView_myReadMarker"
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style={{opacity: 1, width: '99%'}}
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ref={this._startAnimation}
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/>;
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// give it a key which depends on the event id. That will ensure that
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// we get a new DOM node (restarting the animation) when the ghost
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// moves to a different event.
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return (
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<li key={"_readuptoghost_"+this.currentGhostEventId}
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className="mx_RoomView_myReadMarker_container">
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{hr}
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</li>
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);
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},
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_collectEventNode: function(eventId, node) {
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this.eventNodes[eventId] = node;
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},
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// once dynamic content in the events load, make the scrollPanel check the
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// scroll offsets.
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_onWidgetLoad: function() {
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var scrollPanel = this.refs.scrollPanel;
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if (scrollPanel) {
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scrollPanel.forceUpdate();
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}
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},
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onResize: function() {
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dis.dispatch({ action: 'timeline_resize' }, true);
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},
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render: function() {
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var ScrollPanel = sdk.getComponent("structures.ScrollPanel");
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var Spinner = sdk.getComponent("elements.Spinner");
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var topSpinner, bottomSpinner;
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if (this.props.backPaginating) {
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topSpinner = <li key="_topSpinner"><Spinner /></li>;
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}
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if (this.props.forwardPaginating) {
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bottomSpinner = <li key="_bottomSpinner"><Spinner /></li>;
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}
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var style = this.props.hidden ? { display: 'none' } : {};
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style.opacity = this.props.opacity;
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return (
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<ScrollPanel ref="scrollPanel" className="mx_RoomView_messagePanel mx_fadable"
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onScroll={ this.props.onScroll }
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onResize={ this.onResize }
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onFillRequest={ this.props.onFillRequest }
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style={ style }
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stickyBottom={ this.props.stickyBottom }>
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{topSpinner}
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{this._getEventTiles()}
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{bottomSpinner}
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</ScrollPanel>
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);
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},
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});
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