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Merge pull request #486 from vector-im/bwindels/fix-scroll-jumps

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Fix scroll jumps and loading of gaps not at top of the timeline
This commit is contained in:
Bruno Windels 2021-09-16 17:14:17 +02:00 committed by GitHub
commit 9a9b206bf5
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GPG key ID: 4AEE18F83AFDEB23
58 changed files with 598 additions and 332 deletions
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2
src/domain/ViewModel.js
View file

@ -18,7 +18,7 @@ limitations under the License.
// as in some cases it would really be more convenient to have multiple events (like telling the timeline to scroll down)
// we do need to return a disposable from EventEmitter.on, or at least have a method here to easily track a subscription to an EventEmitter
import {EventEmitter} from "../utils/EventEmitter.js";
import {EventEmitter} from "../utils/EventEmitter";
import {Disposables} from "../utils/Disposables.js";
export class ViewModel extends EventEmitter {

2
src/domain/session/room/ComposerViewModel.js
View file

@ -25,7 +25,7 @@ export class ComposerViewModel extends ViewModel {
}
setReplyingTo(entry) {
const changed = this._replyVM?.internalId !== entry?.asEventKey().toString();
const changed = this._replyVM?.id?.equals(entry?.asEventKey());
if (changed) {
this._replyVM = this.disposeTracked(this._replyVM);
if (entry) {

15
src/domain/session/room/timeline/TilesCollection.js
View file

@ -236,6 +236,21 @@ export class TilesCollection extends BaseObservableList {
getFirst() {
return this._tiles[0];
}
getTileIndex(searchTile) {
const idx = sortedIndex(this._tiles, searchTile, (searchTile, tile) => {
return searchTile.compare(tile);
});
const foundTile = this._tiles[idx];
if (foundTile?.compare(searchTile) === 0) {
return idx;
}
return -1;
}
sliceIterator(start, end) {
return this._tiles.slice(start, end)[Symbol.iterator]();
}
}
import {ObservableArray} from "../../../../observable/list/ObservableArray.js";

80
src/domain/session/room/timeline/TimelineViewModel.js
View file

@ -40,40 +40,74 @@ export class TimelineViewModel extends ViewModel {
const {timeline, tilesCreator} = options;
this._timeline = this.track(timeline);
this._tiles = new TilesCollection(timeline.entries, tilesCreator);
this._startTile = null;
this._endTile = null;
this._topLoadingPromise = null;
this._requestedStartTile = null;
this._requestedEndTile = null;
this._requestScheduled = false;
this._showJumpDown = false;
}
/**
* @return {bool} startReached if the start of the timeline was reached
*/
async loadAtTop() {
if (this.isDisposed) {
// stop loading more, we switched room
return true;
/** if this.tiles is empty, call this with undefined for both startTile and endTile */
setVisibleTileRange(startTile, endTile) {
// don't clear these once done as they are used to check
// for more tiles once loadAtTop finishes
this._requestedStartTile = startTile;
this._requestedEndTile = endTile;
if (!this._requestScheduled) {
Promise.resolve().then(() => {
this._setVisibleTileRange(this._requestedStartTile, this._requestedEndTile);
this._requestScheduled = false;
});
this._requestScheduled = true;
}
const firstTile = this._tiles.getFirst();
if (firstTile?.shape === "gap") {
return await firstTile.fill();
}
_setVisibleTileRange(startTile, endTile) {
let loadTop;
if (startTile && endTile) {
// old tiles could have been removed from tilescollection once we support unloading
this._startTile = startTile;
this._endTile = endTile;
const startIndex = this._tiles.getTileIndex(this._startTile);
const endIndex = this._tiles.getTileIndex(this._endTile);
for (const tile of this._tiles.sliceIterator(startIndex, endIndex + 1)) {
tile.notifyVisible();
}
loadTop = startIndex < 10;
this._setShowJumpDown(endIndex < (this._tiles.length - 1));
} else {
const topReached = await this._timeline.loadAtTop(10);
return topReached;
}
// tiles collection is empty, load more at top
loadTop = true;
this._setShowJumpDown(false);
}
unloadAtTop(/*tileAmount*/) {
// get lowerSortKey for tile at index tileAmount - 1
// tell timeline to unload till there (included given key)
if (loadTop && !this._topLoadingPromise) {
this._topLoadingPromise = this._timeline.loadAtTop(10).then(hasReachedEnd => {
this._topLoadingPromise = null;
if (!hasReachedEnd) {
// check if more items need to be loaded by recursing
// use the requested start / end tile,
// so we don't end up overwriting a newly requested visible range here
this.setVisibleTileRange(this._requestedStartTile, this._requestedEndTile);
}
loadAtBottom() {
});
}
unloadAtBottom(/*tileAmount*/) {
// get upperSortKey for tile at index tiles.length - tileAmount
// tell timeline to unload till there (included given key)
}
get tiles() {
return this._tiles;
}
_setShowJumpDown(show) {
if (this._showJumpDown !== show) {
this._showJumpDown = show;
this.emitChange("showJumpDown");
}
}
get showJumpDown() {
return this._showJumpDown;
}
}

25
src/domain/session/room/timeline/tiles/GapTile.js
View file

@ -22,11 +22,11 @@ export class GapTile extends SimpleTile {
super(options);
this._loading = false;
this._error = null;
this._isAtTop = true;
}
async fill() {
// prevent doing this twice
if (!this._loading) {
if (!this._loading && !this._entry.edgeReached) {
this._loading = true;
this.emitChange("isLoading");
try {
@ -43,8 +43,25 @@ export class GapTile extends SimpleTile {
this.emitChange("isLoading");
}
}
// edgeReached will have been updated by fillGap
return this._entry.edgeReached;
}
notifyVisible() {
this.fill();
}
get isAtTop() {
return this._isAtTop;
}
updatePreviousSibling(prev) {
console.log("GapTile.updatePreviousSibling", prev);
super.updatePreviousSibling(prev);
const isAtTop = !prev;
if (this._isAtTop !== isAtTop) {
this._isAtTop = isAtTop;
console.log("isAtTop", this._isAtTop);
this.emitChange("isAtTop");
}
}
updateEntry(entry, params) {

10
src/domain/session/room/timeline/tiles/SimpleTile.js
View file

@ -40,8 +40,8 @@ export class SimpleTile extends ViewModel {
return false;
}
get internalId() {
return this._entry.asEventKey().toString();
get id() {
return this._entry.asEventKey();
}
get isPending() {
@ -83,6 +83,10 @@ export class SimpleTile extends ViewModel {
return this._entry;
}
compare(tile) {
return this.upperEntry.compare(tile.upperEntry);
}
compareEntry(entry) {
return this._entry.compare(entry);
}
@ -119,6 +123,8 @@ export class SimpleTile extends ViewModel {
}
notifyVisible() {}
dispose() {
this.setUpdateEmit(null);
super.dispose();

2
src/matrix/room/BaseRoom.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {EventEmitter} from "../../utils/EventEmitter.js";
import {EventEmitter} from "../../utils/EventEmitter";
import {RoomSummary} from "./RoomSummary.js";
import {GapWriter} from "./timeline/persistence/GapWriter.js";
import {RelationWriter} from "./timeline/persistence/RelationWriter.js";

2
src/matrix/room/Invite.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {EventEmitter} from "../../utils/EventEmitter.js";
import {EventEmitter} from "../../utils/EventEmitter";
import {SummaryData, processStateEvent} from "./RoomSummary.js";
import {Heroes} from "./members/Heroes.js";
import {MemberChange, RoomMember, EVENT_TYPE as MEMBER_EVENT_TYPE} from "./members/RoomMember.js";

6
src/matrix/room/timeline/Timeline.js
View file

@ -72,8 +72,10 @@ export class Timeline {
// as they should only populate once the view subscribes to it
// if they are populated already, the sender profile would be empty
// 30 seems to be a good amount to fill the entire screen
const readerRequest = this._disposables.track(this._timelineReader.readFromEnd(30, txn, log));
// choose good amount here between showing messages initially and
// not spending too much time decrypting messages before showing the timeline.
// more messages should be loaded automatically until the viewport is full by the view if needed.
const readerRequest = this._disposables.track(this._timelineReader.readFromEnd(20, txn, log));
try {
const entries = await readerRequest.complete();
this._setupEntries(entries);

4
src/platform/web/ui/AvatarView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {BaseUpdateView} from "./general/BaseUpdateView.js";
import {BaseUpdateView} from "./general/BaseUpdateView";
import {renderStaticAvatar, renderImg} from "./avatar.js";
/*
@ -66,7 +66,7 @@ export class AvatarView extends BaseUpdateView {
this._avatarTitleChanged();
this._root = renderStaticAvatar(this.value, this._size);
// takes care of update being called when needed
super.mount(options);
this.subscribeOnMount(options);
return this._root;
}

2
src/platform/web/ui/RootView.js
View file

@ -18,7 +18,7 @@ import {SessionView} from "./session/SessionView.js";
import {LoginView} from "./login/LoginView.js";
import {SessionLoadView} from "./login/SessionLoadView.js";
import {SessionPickerView} from "./login/SessionPickerView.js";
import {TemplateView} from "./general/TemplateView.js";
import {TemplateView} from "./general/TemplateView";
import {StaticView} from "./general/StaticView.js";
export class RootView extends TemplateView {

2
src/platform/web/ui/avatar.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {tag, text, classNames, setAttribute} from "./general/html.js";
import {tag, text, classNames, setAttribute} from "./general/html";
/**
* @param {Object} vm view model with {avatarUrl, avatarColorNumber, avatarTitle, avatarLetter}
* @param {Number} size

36
src/platform/web/ui/css/themes/element/icons/chevron-down.svg Normal file
View file

@ -0,0 +1,36 @@
<?xml version="1.0" encoding="UTF-8" standalone="no"?>
<svg
width="17"
height="9"
viewBox="0 0 17 9"
fill="none"
version="1.1"
id="svg839"
xmlns="http://www.w3.org/2000/svg"
xmlns:svg="http://www.w3.org/2000/svg">
<g
clip-path="url(#clip0)"
id="g832"
transform="rotate(-90,4.3001277,4.8826258)">
<path
fill-rule="evenodd"
clip-rule="evenodd"
d="M 8.20723,2.70711 C 8.59775,3.09763 8.59878,3.73182 8.20952,4.1236 L 3.27581,9.08934 8.22556,14.0391 c 0.39052,0.3905 0.39155,1.0247 0.00229,1.4165 -0.38926,0.3918 -1.0214,0.3928 -1.41192,0.0023 L 1.15907,9.80101 C 0.768549,9.41049 0.767523,8.7763 1.15678,8.38452 L 6.79531,2.70939 C 7.18457,2.31761 7.8167,2.31658 8.20723,2.70711 Z"
fill="#8d99a5"
id="path830" />
</g>
<defs
id="defs837">
<clipPath
id="clip0">
<rect
width="8"
height="17"
fill="#ffffff"
transform="rotate(180,4.25,8.5)"
id="rect834"
x="0"
y="0" />
</clipPath>
</defs>
</svg>
Side by side

After

Width:  |  Height:  |  Size: 1 KiB

22
src/platform/web/ui/css/themes/element/timeline.css
View file

@ -15,6 +15,20 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
.Timeline_jumpDown {
width: 40px;
height: 40px;
bottom: 16px;
right: 32px;
border-radius: 100%;
border: 1px solid #8d99a5;
background-image: url("./icons/chevron-down.svg");
background-position: center;
background-color: white;
background-repeat: no-repeat;
cursor: pointer;
}
.Timeline_message {
display: grid;
grid-template:
@ -362,3 +376,11 @@ only loads when the top comes into view*/
.GapView > :not(:first-child) {
margin-left: 12px;
}
.GapView {
padding: 52px 20px;
}
.GapView.isAtTop {
padding: 52px 20px 12px 20px;
}

36
src/platform/web/ui/css/timeline.css
View file

@ -14,13 +14,35 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
.Timeline {
display: flex;
flex-direction: column;
position: relative;
}
.RoomView_body > ul {
overflow-y: auto;
overscroll-behavior: contain;
list-style: none;
.Timeline_jumpDown {
position: absolute;
}
.Timeline_scroller {
overflow-y: scroll;
overscroll-behavior-y: contain;
overflow-anchor: none;
padding: 0;
margin: 0;
/* need to read the offsetTop of tiles relative to this element in TimelineView */
position: relative;
min-height: 0;
flex: 1 0 0;
}
.Timeline_scroller > ul {
list-style: none;
/* use small horizontal padding so first/last children margin isn't collapsed
at the edge and a scrollbar shows up when setting margin-top to bottom-align
content when there are not yet enough tiles to fill the viewport */
padding: 1px 0;
margin: 0;
}
.message-container {
@ -49,13 +71,7 @@ limitations under the License.
}
.GapView {
visibility: hidden;
display: flex;
padding: 10px 20px;
}
.GapView.isLoading {
visibility: visible;
}
.GapView > :nth-child(2) {

33
src/platform/web/ui/general/BaseUpdateView.js → src/platform/web/ui/general/BaseUpdateView.ts
View file

@ -1,5 +1,6 @@
/*
Copyright 2021 The Matrix.org Foundation C.I.C.
Copyright 2021 Daniel Fedorin <danila.fedorin@gmail.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -14,40 +15,54 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
export class BaseUpdateView {
constructor(value) {
import {IMountArgs, ViewNode, IView} from "./types";
export interface IObservableValue {
on?(event: "change", handler: (props?: string[]) => void): void;
off?(event: "change", handler: (props?: string[]) => void): void;
}
export abstract class BaseUpdateView<T extends IObservableValue> implements IView {
protected _value: T
protected _boundUpdateFromValue: ((props?: string[]) => void) | null
abstract mount(args?: IMountArgs): ViewNode;
abstract root(): ViewNode | undefined;
abstract update(...any);
constructor(value :T) {
this._value = value;
// TODO: can avoid this if we adopt the handleEvent pattern in our EventListener
this._boundUpdateFromValue = null;
}
mount(options) {
subscribeOnMount(options?: IMountArgs): void {
const parentProvidesUpdates = options && options.parentProvidesUpdates;
if (!parentProvidesUpdates) {
this._subscribe();
}
}
unmount() {
unmount(): void {
this._unsubscribe();
}
get value() {
get value(): T {
return this._value;
}
_updateFromValue(changedProps) {
_updateFromValue(changedProps?: string[]) {
this.update(this._value, changedProps);
}
_subscribe() {
_subscribe(): void {
if (typeof this._value?.on === "function") {
this._boundUpdateFromValue = this._updateFromValue.bind(this);
this._boundUpdateFromValue = this._updateFromValue.bind(this) as (props?: string[]) => void;
this._value.on("change", this._boundUpdateFromValue);
}
}
_unsubscribe() {
_unsubscribe(): void {
if (this._boundUpdateFromValue) {
if (typeof this._value.off === "function") {
this._value.off("change", this._boundUpdateFromValue);

2
src/platform/web/ui/general/LazyListView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {el} from "./html.js";
import {el} from "./html";
import {mountView} from "./utils";
import {ListView} from "./ListView";
import {insertAt} from "./utils";

39
src/platform/web/ui/general/ListView.ts
View file

@ -14,10 +14,10 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {el} from "./html.js";
import {el} from "./html";
import {mountView, insertAt} from "./utils";
import {BaseObservableList as ObservableList} from "../../../../observable/list/BaseObservableList.js";
import {UIView, IMountArgs} from "./types";
import {IView, IMountArgs} from "./types";
interface IOptions<T, V> {
list: ObservableList<T>,
@ -29,13 +29,13 @@ interface IOptions<T, V> {
type SubscriptionHandle = () => undefined;
export class ListView<T, V extends UIView> implements UIView {
export class ListView<T, V extends IView> implements IView {
private _onItemClick?: (childView: V, evt: UIEvent) => void;
private _list: ObservableList<T>;
private _className?: string;
private _tagName: string;
private _root?: HTMLElement;
private _root?: Element;
private _subscription?: SubscriptionHandle;
private _childCreator: (value: T) => V;
private _childInstances?: V[];
@ -56,9 +56,9 @@ export class ListView<T, V extends UIView> implements UIView {
this._mountArgs = {parentProvidesUpdates};
}
root(): HTMLElement {
root(): Element | undefined {
// won't be undefined when called between mount and unmount
return this._root!;
return this._root;
}
update(attributes: IOptions<T, V>) {
@ -74,17 +74,17 @@ export class ListView<T, V extends UIView> implements UIView {
}
}
mount(): HTMLElement {
mount(): Element {
const attr: {[name: string]: any} = {};
if (this._className) {
attr.className = this._className;
}
this._root = el(this._tagName, attr);
const root = this._root = el(this._tagName, attr);
this.loadList();
if (this._onItemClick) {
this._root!.addEventListener("click", this);
root.addEventListener("click", this);
}
return this._root!;
return root;
}
handleEvent(evt: Event) {
@ -138,28 +138,22 @@ export class ListView<T, V extends UIView> implements UIView {
}
protected onAdd(idx: number, value: T) {
this.onBeforeListChanged();
const child = this._childCreator(value);
this._childInstances!.splice(idx, 0, child);
insertAt(this._root!, idx, mountView(child, this._mountArgs));
this.onListChanged();
}
protected onRemove(idx: number, value: T) {
this.onBeforeListChanged();
const [child] = this._childInstances!.splice(idx, 1);
child.root().remove();
child.root()!.remove();
child.unmount();
this.onListChanged();
}
protected onMove(fromIdx: number, toIdx: number, value: T) {
this.onBeforeListChanged();
const [child] = this._childInstances!.splice(fromIdx, 1);
this._childInstances!.splice(toIdx, 0, child);
child.root().remove();
insertAt(this._root!, toIdx, child.root());
this.onListChanged();
child.root()!.remove();
insertAt(this._root!, toIdx, child.root()! as Element);
}
protected onUpdate(i: number, value: T, params: any) {
@ -176,16 +170,13 @@ export class ListView<T, V extends UIView> implements UIView {
this.onRemove(index, value);
} else {
const [oldChild] = this._childInstances!.splice(index, 1, child);
this._root!.replaceChild(child.mount(this._mountArgs), oldChild.root());
this._root!.replaceChild(child.mount(this._mountArgs), oldChild.root()!);
oldChild.unmount();
}
}
}
protected onBeforeListChanged() {}
protected onListChanged() {}
protected getChildInstanceByIndex(idx: number): V | undefined {
public getChildInstanceByIndex(idx: number): V | undefined {
return this._childInstances?.[idx];
}
}

2
src/platform/web/ui/general/LoadingView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "./TemplateView.js";
import {TemplateView} from "./TemplateView";
import {spinner} from "../common.js";
export class LoadingView extends TemplateView {

2
src/platform/web/ui/general/Menu.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "./TemplateView.js";
import {TemplateView} from "./TemplateView";
export class Menu extends TemplateView {
static option(label, callback) {

2
src/platform/web/ui/general/Popup.js
View file

@ -169,7 +169,7 @@ export class Popup {
return true;
}
/* fake UIView api, so it can be tracked by a template view as a subview */
/* fake IView api, so it can be tracked by a template view as a subview */
root() {
return this._fakeRoot;
}

2
src/platform/web/ui/general/StaticView.js
View file

@ -15,7 +15,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {tag} from "../general/html.js";
import {tag} from "../general/html";
export class StaticView {
constructor(value, render = undefined) {

144
src/platform/web/ui/general/TemplateView.js → src/platform/web/ui/general/TemplateView.ts
View file

@ -1,5 +1,6 @@
/*
Copyright 2020 Bruno Windels <bruno@windels.cloud>
Copyright 2021 Daniel Fedorin <danila.fedorin@gmail.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -14,11 +15,12 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import { setAttribute, text, isChildren, classNames, TAG_NAMES, HTML_NS } from "./html.js";
import { setAttribute, text, isChildren, classNames, TAG_NAMES, HTML_NS, ClassNames, Child} from "./html";
import {mountView} from "./utils";
import {BaseUpdateView} from "./BaseUpdateView.js";
import {BaseUpdateView, IObservableValue} from "./BaseUpdateView";
import {IMountArgs, ViewNode, IView} from "./types";
function objHasFns(obj) {
function objHasFns(obj: ClassNames<unknown>): obj is { [className: string]: boolean } {
for(const value of Object.values(obj)) {
if (typeof value === "function") {
return true;
@ -26,6 +28,17 @@ function objHasFns(obj) {
}
return false;
}
export type RenderFn<T> = (t: Builder<T>, vm: T) => ViewNode;
type EventHandler = ((event: Event) => void);
type AttributeStaticValue = string | boolean;
type AttributeBinding<T> = (value: T) => AttributeStaticValue;
export type AttrValue<T> = AttributeStaticValue | AttributeBinding<T> | EventHandler | ClassNames<T>;
export type Attributes<T> = { [attribute: string]: AttrValue<T> };
type ElementFn<T> = (attributes?: Attributes<T> | Child | Child[], children?: Child | Child[]) => Element;
export type Builder<T> = TemplateBuilder<T> & { [tagName in typeof TAG_NAMES[string][number]]: ElementFn<T> };
/**
Bindable template. Renders once, and allows bindings for given nodes. If you need
to change the structure on a condition, use a subtemplate (if)
@ -39,18 +52,21 @@ function objHasFns(obj) {
- add subviews inside the template
*/
// TODO: should we rename this to BoundView or something? As opposed to StaticView ...
export class TemplateView extends BaseUpdateView {
constructor(value, render = undefined) {
export class TemplateView<T extends IObservableValue> extends BaseUpdateView<T> {
private _render?: RenderFn<T>;
private _eventListeners?: { node: Element, name: string, fn: EventHandler, useCapture: boolean }[] = undefined;
private _bindings?: (() => void)[] = undefined;
private _root?: ViewNode = undefined;
// public because used by TemplateBuilder
_subViews?: IView[] = undefined;
constructor(value: T, render?: RenderFn<T>) {
super(value);
// TODO: can avoid this if we have a separate class for inline templates vs class template views
this._render = render;
this._eventListeners = null;
this._bindings = null;
this._subViews = null;
this._root = null;
}
_attach() {
_attach(): void {
if (this._eventListeners) {
for (let {node, name, fn, useCapture} of this._eventListeners) {
node.addEventListener(name, fn, useCapture);
@ -58,7 +74,7 @@ export class TemplateView extends BaseUpdateView {
}
}
_detach() {
_detach(): void {
if (this._eventListeners) {
for (let {node, name, fn, useCapture} of this._eventListeners) {
node.removeEventListener(name, fn, useCapture);
@ -66,13 +82,13 @@ export class TemplateView extends BaseUpdateView {
}
}
mount(options) {
const builder = new TemplateBuilder(this);
mount(options?: IMountArgs): ViewNode {
const builder = new TemplateBuilder(this) as Builder<T>;
try {
if (this._render) {
this._root = this._render(builder, this._value);
} else if (this.render) { // overriden in subclass
this._root = this.render(builder, this._value);
} else if (this["render"]) { // overriden in subclass
this._root = this["render"](builder, this._value);
} else {
throw new Error("no render function passed in, or overriden in subclass");
}
@ -80,12 +96,12 @@ export class TemplateView extends BaseUpdateView {
builder.close();
}
// takes care of update being called when needed
super.mount(options);
this.subscribeOnMount(options);
this._attach();
return this._root;
return this._root!;
}
unmount() {
unmount(): void {
this._detach();
super.unmount();
if (this._subViews) {
@ -95,11 +111,11 @@ export class TemplateView extends BaseUpdateView {
}
}
root() {
root(): ViewNode | undefined {
return this._root;
}
update(value) {
update(value: T, props?: string[]): void {
this._value = value;
if (this._bindings) {
for (const binding of this._bindings) {
@ -108,35 +124,36 @@ export class TemplateView extends BaseUpdateView {
}
}
_addEventListener(node, name, fn, useCapture = false) {
_addEventListener(node: Element, name: string, fn: (event: Event) => void, useCapture: boolean = false): void {
if (!this._eventListeners) {
this._eventListeners = [];
}
this._eventListeners.push({node, name, fn, useCapture});
}
_addBinding(bindingFn) {
_addBinding(bindingFn: () => void): void {
if (!this._bindings) {
this._bindings = [];
}
this._bindings.push(bindingFn);
}
addSubView(view) {
addSubView(view: IView): void {
if (!this._subViews) {
this._subViews = [];
}
this._subViews.push(view);
}
removeSubView(view) {
removeSubView(view: IView): void {
if (!this._subViews) { return; }
const idx = this._subViews.indexOf(view);
if (idx !== -1) {
this._subViews.splice(idx, 1);
}
}
updateSubViews(value, props) {
updateSubViews(value: IObservableValue, props: string[]) {
if (this._subViews) {
for (const v of this._subViews) {
v.update(value, props);
@ -146,33 +163,35 @@ export class TemplateView extends BaseUpdateView {
}
// what is passed to render
class TemplateBuilder {
constructor(templateView) {
export class TemplateBuilder<T extends IObservableValue> {
private _templateView: TemplateView<T>;
private _closed: boolean = false;
constructor(templateView: TemplateView<T>) {
this._templateView = templateView;
this._closed = false;
}
close() {
close(): void {
this._closed = true;
}
_addBinding(fn) {
_addBinding(fn: () => void): void {
if (this._closed) {
console.trace("Adding a binding after render will likely cause memory leaks");
}
this._templateView._addBinding(fn);
}
get _value() {
return this._templateView._value;
get _value(): T {
return this._templateView.value;
}
addEventListener(node, name, fn, useCapture = false) {
addEventListener(node: Element, name: string, fn: (event: Event) => void, useCapture: boolean = false): void {
this._templateView._addEventListener(node, name, fn, useCapture);
}
_addAttributeBinding(node, name, fn) {
let prevValue = undefined;
_addAttributeBinding(node: Element, name: string, fn: (value: T) => boolean | string): void {
let prevValue: string | boolean | undefined = undefined;
const binding = () => {
const newValue = fn(this._value);
if (prevValue !== newValue) {
@ -184,11 +203,11 @@ class TemplateBuilder {
binding();
}
_addClassNamesBinding(node, obj) {
_addClassNamesBinding(node: Element, obj: ClassNames<T>): void {
this._addAttributeBinding(node, "className", value => classNames(obj, value));
}
_addTextBinding(fn) {
_addTextBinding(fn: (value: T) => string): Text {
const initialValue = fn(this._value);
const node = text(initialValue);
let prevValue = initialValue;
@ -204,21 +223,30 @@ class TemplateBuilder {
return node;
}
_setNodeAttributes(node, attributes) {
_isEventHandler(key: string, value: AttrValue<T>): value is (event: Event) => void {
// This isn't actually safe, but it's incorrect to feed event handlers to
// non-on* attributes.
return key.startsWith("on") && key.length > 2 && typeof value === "function";
}
_setNodeAttributes(node: Element, attributes: Attributes<T>): void {
for(let [key, value] of Object.entries(attributes)) {
const isFn = typeof value === "function";
// binding for className as object of className => enabled
if (key === "className" && typeof value === "object" && value !== null) {
if (typeof value === "object") {
if (key !== "className" || value === null) {
// Ignore non-className objects.
continue;
}
if (objHasFns(value)) {
this._addClassNamesBinding(node, value);
} else {
setAttribute(node, key, classNames(value));
setAttribute(node, key, classNames(value, this._value));
}
} else if (key.startsWith("on") && key.length > 2 && isFn) {
} else if (this._isEventHandler(key, value)) {
const eventName = key.substr(2, 1).toLowerCase() + key.substr(3);
const handler = value;
this._templateView._addEventListener(node, eventName, handler);
} else if (isFn) {
} else if (typeof value === "function") {
this._addAttributeBinding(node, key, value);
} else {
setAttribute(node, key, value);
@ -226,14 +254,14 @@ class TemplateBuilder {
}
}
_setNodeChildren(node, children) {
_setNodeChildren(node: Element, children: Child | Child[]): void{
if (!Array.isArray(children)) {
children = [children];
}
for (let child of children) {
if (typeof child === "function") {
child = this._addTextBinding(child);
} else if (!child.nodeType) {
} else if (typeof child === "string") {
// not a DOM node, turn into text
child = text(child);
}
@ -241,7 +269,7 @@ class TemplateBuilder {
}
}
_addReplaceNodeBinding(fn, renderNode) {
_addReplaceNodeBinding<R>(fn: (value: T) => R, renderNode: (old: ViewNode | null) => ViewNode): ViewNode {
let prevValue = fn(this._value);
let node = renderNode(null);
@ -260,14 +288,14 @@ class TemplateBuilder {
return node;
}
el(name, attributes, children) {
el(name: string, attributes?: Attributes<T> | Child | Child[], children?: Child | Child[]): ViewNode {
return this.elNS(HTML_NS, name, attributes, children);
}
elNS(ns, name, attributes, children) {
if (attributes && isChildren(attributes)) {
elNS(ns: string, name: string, attributes?: Attributes<T> | Child | Child[], children?: Child | Child[]): ViewNode {
if (attributes !== undefined && isChildren(attributes)) {
children = attributes;
attributes = null;
attributes = undefined;
}
const node = document.createElementNS(ns, name);
@ -284,22 +312,24 @@ class TemplateBuilder {
// this inserts a view, and is not a view factory for `if`, so returns the root element to insert in the template
// you should not call t.view() and not use the result (e.g. attach the result to the template DOM tree).
view(view, mountOptions = undefined) {
view(view: IView, mountOptions?: IMountArgs): ViewNode {
this._templateView.addSubView(view);
return mountView(view, mountOptions);
}
// map a value to a view, every time the value changes
mapView(mapFn, viewCreator) {
mapView<R>(mapFn: (value: T) => R, viewCreator: (mapped: R) => IView | null): ViewNode {
return this._addReplaceNodeBinding(mapFn, (prevNode) => {
if (prevNode && prevNode.nodeType !== Node.COMMENT_NODE) {
const subViews = this._templateView._subViews;
if (subViews) {
const viewIdx = subViews.findIndex(v => v.root() === prevNode);
if (viewIdx !== -1) {
const [view] = subViews.splice(viewIdx, 1);
view.unmount();
}
}
}
const view = viewCreator(mapFn(this._value));
if (view) {
return this.view(view);
@ -312,7 +342,7 @@ class TemplateBuilder {
// Special case of mapView for a TemplateView.
// Always creates a TemplateView, if this is optional depending
// on mappedValue, use `if` or `mapView`
map(mapFn, renderFn) {
map<R>(mapFn: (value: T) => R, renderFn: (mapped: R, t: Builder<T>, vm: T) => ViewNode): ViewNode {
return this.mapView(mapFn, mappedValue => {
return new TemplateView(this._value, (t, vm) => {
const rootNode = renderFn(mappedValue, t, vm);
@ -326,7 +356,7 @@ class TemplateBuilder {
});
}
ifView(predicate, viewCreator) {
ifView(predicate: (value: T) => boolean, viewCreator: (value: T) => IView): ViewNode {
return this.mapView(
value => !!predicate(value),
enabled => enabled ? viewCreator(this._value) : null
@ -335,7 +365,7 @@ class TemplateBuilder {
// creates a conditional subtemplate
// use mapView if you need to map to a different view class
if(predicate, renderFn) {
if(predicate: (value: T) => boolean, renderFn: (t: Builder<T>, vm: T) => ViewNode) {
return this.ifView(predicate, vm => new TemplateView(vm, renderFn));
}
@ -345,8 +375,8 @@ class TemplateBuilder {
This should only be used if the side-effect won't add any bindings,
event handlers, ...
You should not call the TemplateBuilder (e.g. `t.xxx()`) at all from the side effect,
instead use tags from html.js to help you construct any DOM you need. */
mapSideEffect(mapFn, sideEffect) {
instead use tags from html.ts to help you construct any DOM you need. */
mapSideEffect<R>(mapFn: (value: T) => R, sideEffect: (newV: R, oldV: R | undefined) => void) {
let prevValue = mapFn(this._value);
const binding = () => {
const newValue = mapFn(this._value);

40
src/platform/web/ui/general/html.js → src/platform/web/ui/general/html.ts
View file

@ -1,5 +1,6 @@
/*
Copyright 2020 Bruno Windels <bruno@windels.cloud>
Copyright 2021 Daniel Fedorin <danila.fedorin@gmail.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -16,12 +17,18 @@ limitations under the License.
// DOM helper functions
export function isChildren(children) {
import {ViewNode} from "./types";
export type ClassNames<T> = { [className: string]: boolean | ((value: T) => boolean) }
export type BasicAttributes<T> = { [attribute: string]: ClassNames<T> | boolean | string }
export type Child = string | Text | ViewNode;
export function isChildren(children: object | Child | Child[]): children is Child | Child[] {
// children should be an not-object (that's the attributes), or a domnode, or an array
return typeof children !== "object" || !!children.nodeType || Array.isArray(children);
return typeof children !== "object" || "nodeType" in children || Array.isArray(children);
}
export function classNames(obj, value) {
export function classNames<T>(obj: ClassNames<T>, value: T): string {
return Object.entries(obj).reduce((cn, [name, enabled]) => {
if (typeof enabled === "function") {
enabled = enabled(value);
@ -34,7 +41,7 @@ export function classNames(obj, value) {
}, "");
}
export function setAttribute(el, name, value) {
export function setAttribute(el: Element, name: string, value: string | boolean): void {
if (name === "className") {
name = "class";
}
@ -48,22 +55,24 @@ export function setAttribute(el, name, value) {
}
}
export function el(elementName, attributes, children) {
export function el(elementName: string, attributes?: BasicAttributes<never> | Child | Child[], children?: Child | Child[]): Element {
return elNS(HTML_NS, elementName, attributes, children);
}
export function elNS(ns, elementName, attributes, children) {
export function elNS(ns: string, elementName: string, attributes?: BasicAttributes<never> | Child | Child[], children?: Child | Child[]): Element {
if (attributes && isChildren(attributes)) {
children = attributes;
attributes = null;
attributes = undefined;
}
const e = document.createElementNS(ns, elementName);
if (attributes) {
for (let [name, value] of Object.entries(attributes)) {
if (name === "className" && typeof value === "object" && value !== null) {
value = classNames(value);
if (typeof value === "object") {
// Only className should ever be an object; be careful
// here anyway and ignore object-valued non-className attributes.
value = (value !== null && name === "className") ? classNames(value, undefined) : false;
}
setAttribute(e, name, value);
}
@ -74,7 +83,7 @@ export function elNS(ns, elementName, attributes, children) {
children = [children];
}
for (let c of children) {
if (!c.nodeType) {
if (typeof c === "string") {
c = text(c);
}
e.appendChild(c);
@ -83,12 +92,12 @@ export function elNS(ns, elementName, attributes, children) {
return e;
}
export function text(str) {
export function text(str: string): Text {
return document.createTextNode(str);
}
export const HTML_NS = "http://www.w3.org/1999/xhtml";
export const SVG_NS = "http://www.w3.org/2000/svg";
export const HTML_NS: string = "http://www.w3.org/1999/xhtml";
export const SVG_NS: string = "http://www.w3.org/2000/svg";
export const TAG_NAMES = {
[HTML_NS]: [
@ -97,10 +106,9 @@ export const TAG_NAMES = {
"table", "thead", "tbody", "tr", "th", "td", "hr",
"pre", "code", "button", "time", "input", "textarea", "label", "form", "progress", "output", "video"],
[SVG_NS]: ["svg", "circle"]
};
export const tag = {};
} as const;
export const tag: { [tagName in typeof TAG_NAMES[string][number]]: (attributes?: BasicAttributes<never> | Child | Child[], children?: Child | Child[]) => Element } = {} as any;
for (const [ns, tags] of Object.entries(TAG_NAMES)) {
for (const tagName of tags) {

12
src/platform/web/ui/general/types.ts
View file

@ -1,5 +1,6 @@
/*
Copyright 2021 The Matrix.org Foundation C.I.C.
Copyright 2021 Daniel Fedorin <danila.fedorin@gmail.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -15,12 +16,15 @@ limitations under the License.
*/
export interface IMountArgs {
// if true, the parent will call update() rather than the view updating itself by binding to a data source.
parentProvidesUpdates: boolean
parentProvidesUpdates?: boolean
};
export interface UIView {
mount(args?: IMountArgs): HTMLElement;
root(): HTMLElement; // should only be called between mount() and unmount()
// Comment nodes can be used as temporary placeholders for Elements, like TemplateView does.
export type ViewNode = Element | Comment;
export interface IView {
mount(args?: IMountArgs): ViewNode;
root(): ViewNode | undefined; // should only be called between mount() and unmount()
unmount(): void;
update(...any); // this isn't really standarized yet
}

10
src/platform/web/ui/general/utils.ts
View file

@ -14,10 +14,10 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {UIView, IMountArgs} from "./types";
import {tag} from "./html.js";
import {IView, IMountArgs, ViewNode} from "./types";
import {tag} from "./html";
export function mountView(view: UIView, mountArgs: IMountArgs): HTMLElement {
export function mountView(view: IView, mountArgs?: IMountArgs): ViewNode {
let node;
try {
node = view.mount(mountArgs);
@ -27,7 +27,7 @@ export function mountView(view: UIView, mountArgs: IMountArgs): HTMLElement {
return node;
}
export function errorToDOM(error: Error): HTMLElement {
export function errorToDOM(error: Error): Element {
const stack = new Error().stack;
let callee: string | null = null;
if (stack) {
@ -41,7 +41,7 @@ export function errorToDOM(error: Error): HTMLElement {
]);
}
export function insertAt(parentNode: HTMLElement, idx: number, childNode: HTMLElement): void {
export function insertAt(parentNode: Element, idx: number, childNode: Node): void {
const isLast = idx === parentNode.childElementCount;
if (isLast) {
parentNode.appendChild(childNode);

2
src/platform/web/ui/login/CompleteSSOView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../general/TemplateView.js";
import {TemplateView} from "../general/TemplateView";
import {SessionLoadStatusView} from "./SessionLoadStatusView.js";
export class CompleteSSOView extends TemplateView {

2
src/platform/web/ui/login/LoginView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../general/TemplateView.js";
import {TemplateView} from "../general/TemplateView";
import {hydrogenGithubLink} from "./common.js";
import {PasswordLoginView} from "./PasswordLoginView.js";
import {CompleteSSOView} from "./CompleteSSOView.js";

2
src/platform/web/ui/login/PasswordLoginView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../general/TemplateView.js";
import {TemplateView} from "../general/TemplateView";
export class PasswordLoginView extends TemplateView {
render(t, vm) {

2
src/platform/web/ui/login/SessionLoadStatusView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../general/TemplateView.js";
import {TemplateView} from "../general/TemplateView";
import {spinner} from "../common.js";
/** a view used both in the login view and the loading screen

2
src/platform/web/ui/login/SessionLoadView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../general/TemplateView.js";
import {TemplateView} from "../general/TemplateView";
import {SessionLoadStatusView} from "./SessionLoadStatusView.js";
export class SessionLoadView extends TemplateView {

2
src/platform/web/ui/login/SessionPickerView.js
View file

@ -15,7 +15,7 @@ limitations under the License.
*/
import {ListView} from "../general/ListView";
import {TemplateView} from "../general/TemplateView.js";
import {TemplateView} from "../general/TemplateView";
import {hydrogenGithubLink} from "./common.js";
import {SessionLoadStatusView} from "./SessionLoadStatusView.js";

2
src/platform/web/ui/session/RoomGridView.js
View file

@ -16,7 +16,7 @@ limitations under the License.
import {RoomView} from "./room/RoomView.js";
import {InviteView} from "./room/InviteView.js";
import {TemplateView} from "../general/TemplateView.js";
import {TemplateView} from "../general/TemplateView";
import {StaticView} from "../general/StaticView.js";
export class RoomGridView extends TemplateView {

2
src/platform/web/ui/session/SessionStatusView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../general/TemplateView.js";
import {TemplateView} from "../general/TemplateView";
import {spinner} from "../common.js";
export class SessionStatusView extends TemplateView {

2
src/platform/web/ui/session/SessionView.js
View file

@ -20,7 +20,7 @@ import {RoomView} from "./room/RoomView.js";
import {UnknownRoomView} from "./room/UnknownRoomView.js";
import {InviteView} from "./room/InviteView.js";
import {LightboxView} from "./room/LightboxView.js";
import {TemplateView} from "../general/TemplateView.js";
import {TemplateView} from "../general/TemplateView";
import {StaticView} from "../general/StaticView.js";
import {SessionStatusView} from "./SessionStatusView.js";
import {RoomGridView} from "./RoomGridView.js";

2
src/platform/web/ui/session/leftpanel/InviteTileView.js
View file

@ -15,7 +15,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {renderStaticAvatar} from "../../avatar.js";
import {spinner} from "../../common.js";

2
src/platform/web/ui/session/leftpanel/LeftPanelView.js
View file

@ -15,7 +15,7 @@ limitations under the License.
*/
import {ListView} from "../../general/ListView";
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {RoomTileView} from "./RoomTileView.js";
import {InviteTileView} from "./InviteTileView.js";

2
src/platform/web/ui/session/leftpanel/RoomTileView.js
View file

@ -15,7 +15,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {AvatarView} from "../../AvatarView.js";
export class RoomTileView extends TemplateView {

2
src/platform/web/ui/session/rightpanel/MemberDetailsView.js
View file

@ -15,7 +15,7 @@ limitations under the License.
*/
import {AvatarView} from "../../AvatarView.js";
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
export class MemberDetailsView extends TemplateView {
render(t, vm) {

2
src/platform/web/ui/session/rightpanel/MemberTileView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {AvatarView} from "../../AvatarView.js";
export class MemberTileView extends TemplateView {

2
src/platform/web/ui/session/rightpanel/RightPanelView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {RoomDetailsView} from "./RoomDetailsView.js";
import {MemberListView} from "./MemberListView.js";
import {LoadingView} from "../../general/LoadingView.js";

4
src/platform/web/ui/session/rightpanel/RoomDetailsView.js
View file

@ -14,8 +14,8 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {classNames, tag} from "../../general/html.js";
import {TemplateView} from "../../general/TemplateView";
import {classNames, tag} from "../../general/html";
import {AvatarView} from "../../AvatarView.js";
export class RoomDetailsView extends TemplateView {

2
src/platform/web/ui/session/room/InviteView.js
View file

@ -15,7 +15,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {renderStaticAvatar} from "../../avatar.js";
export class InviteView extends TemplateView {

2
src/platform/web/ui/session/room/LightboxView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {spinner} from "../../common.js";
export class LightboxView extends TemplateView {

2
src/platform/web/ui/session/room/MessageComposer.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {Popup} from "../../general/Popup.js";
import {Menu} from "../../general/Menu.js";
import {viewClassForEntry} from "./TimelineView"

2
src/platform/web/ui/session/room/RoomArchivedView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
export class RoomArchivedView extends TemplateView {
render(t) {

2
src/platform/web/ui/session/room/RoomView.js
View file

@ -15,7 +15,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {Popup} from "../../general/Popup.js";
import {Menu} from "../../general/Menu.js";
import {TimelineView} from "./TimelineView";

2
src/platform/web/ui/session/room/TimelineLoadingView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {spinner} from "../../common.js";
export class TimelineLoadingView extends TemplateView {

279
src/platform/web/ui/session/room/TimelineView.ts
View file

@ -15,6 +15,8 @@ limitations under the License.
*/
import {ListView} from "../../general/ListView";
import {TemplateView, Builder} from "../../general/TemplateView";
import {IObservableValue} from "../../general/BaseUpdateView";
import {GapView} from "./timeline/GapView.js";
import {TextMessageView} from "./timeline/TextMessageView.js";
import {ImageView} from "./timeline/ImageView.js";
@ -24,7 +26,14 @@ import {MissingAttachmentView} from "./timeline/MissingAttachmentView.js";
import {AnnouncementView} from "./timeline/AnnouncementView.js";
import {RedactedView} from "./timeline/RedactedView.js";
import {SimpleTile} from "../../../../../domain/session/room/timeline/tiles/SimpleTile.js";
import {TimelineViewModel} from "../../../../../domain/session/room/timeline/TimelineViewModel.js";
import {BaseObservableList as ObservableList} from "../../../../../observable/list/BaseObservableList.js";
//import {TimelineViewModel} from "../../../../../domain/session/room/timeline/TimelineViewModel.js";
interface TimelineViewModel extends IObservableValue {
showJumpDown: boolean;
tiles: ObservableList<SimpleTile>;
setVisibleTileRange(start?: SimpleTile, end?: SimpleTile);
}
type TileView = GapView | AnnouncementView | TextMessageView |
ImageView | VideoView | FileView | MissingAttachmentView | RedactedView;
@ -46,16 +55,152 @@ export function viewClassForEntry(entry: SimpleTile): TileViewConstructor | unde
}
}
export class TimelineView extends ListView<SimpleTile, TileView> {
function bottom(node: HTMLElement): number {
return node.offsetTop + node.clientHeight;
}
private _atBottom: boolean;
private _topLoadingPromise?: Promise<boolean>;
private _viewModel: TimelineViewModel;
function findFirstNodeIndexAtOrBelow(tiles: HTMLElement, top: number, startIndex: number = (tiles.children.length - 1)): number {
for (var i = startIndex; i >= 0; i--) {
const node = tiles.children[i] as HTMLElement;
if (node.offsetTop < top) {
return i;
}
}
// return first item if nothing matched before
return 0;
}
constructor(viewModel: TimelineViewModel) {
export class TimelineView extends TemplateView<TimelineViewModel> {
private anchoredNode?: HTMLElement;
private anchoredBottom: number = 0;
private stickToBottom: boolean = true;
private tilesView?: TilesListView;
private resizeObserver?: ResizeObserver;
render(t: Builder<TimelineViewModel>, vm: TimelineViewModel) {
// assume this view will be mounted in the parent DOM straight away
requestAnimationFrame(() => {
// do initial scroll positioning
this.restoreScrollPosition();
});
this.tilesView = new TilesListView(vm.tiles, () => this.restoreScrollPosition());
const root = t.div({className: "Timeline"}, [
t.div({
className: "Timeline_scroller bottom-aligned-scroll",
onScroll: () => this.onScroll()
}, t.view(this.tilesView)),
t.button({
className: {
"Timeline_jumpDown": true,
hidden: vm => !vm.showJumpDown
},
title: "Jump down",
onClick: () => this.jumpDown()
})
]);
if (typeof ResizeObserver === "function") {
this.resizeObserver = new ResizeObserver(() => {
this.restoreScrollPosition();
});
this.resizeObserver.observe(root);
}
return root;
}
private get scrollNode(): HTMLElement {
return (this.root()! as HTMLElement).firstElementChild! as HTMLElement;
}
private get tilesNode(): HTMLElement {
return this.tilesView!.root()! as HTMLElement;
}
private jumpDown() {
const {scrollNode} = this;
this.stickToBottom = true;
scrollNode.scrollTop = scrollNode.scrollHeight;
}
public unmount() {
super.unmount();
if (this.resizeObserver) {
this.resizeObserver.unobserve(this.root()! as Element);
this.resizeObserver = undefined;
}
}
private restoreScrollPosition() {
const {scrollNode, tilesNode} = this;
const missingTilesHeight = scrollNode.clientHeight - tilesNode.clientHeight;
if (missingTilesHeight > 0) {
tilesNode.style.setProperty("margin-top", `${missingTilesHeight}px`);
// we don't have enough tiles to fill the viewport, so set all as visible
const len = this.value.tiles.length;
this.updateVisibleRange(0, len - 1);
} else {
tilesNode.style.removeProperty("margin-top");
if (this.stickToBottom) {
scrollNode.scrollTop = scrollNode.scrollHeight;
} else if (this.anchoredNode) {
const newAnchoredBottom = bottom(this.anchoredNode!);
if (newAnchoredBottom !== this.anchoredBottom) {
const bottomDiff = newAnchoredBottom - this.anchoredBottom;
// scrollBy tends to create less scroll jumps than reassigning scrollTop as it does
// not depend on reading scrollTop, which might be out of date as some platforms
// run scrolling off the main thread.
if (typeof scrollNode.scrollBy === "function") {
scrollNode.scrollBy(0, bottomDiff);
} else {
scrollNode.scrollTop = scrollNode.scrollTop + bottomDiff;
}
this.anchoredBottom = newAnchoredBottom;
}
}
// TODO: should we be updating the visible range here as well as the range might have changed even though
// we restored the bottom tile
}
}
private onScroll(): void {
const {scrollNode, tilesNode} = this;
const {scrollHeight, scrollTop, clientHeight} = scrollNode;
let bottomNodeIndex;
this.stickToBottom = Math.abs(scrollHeight - (scrollTop + clientHeight)) < 1;
if (this.stickToBottom) {
const len = this.value.tiles.length;
bottomNodeIndex = len - 1;
} else {
const viewportBottom = scrollTop + clientHeight;
// console.log(`viewportBottom: ${viewportBottom} (${scrollTop} + ${clientHeight})`);
const anchoredNodeIndex = findFirstNodeIndexAtOrBelow(tilesNode, viewportBottom);
this.anchoredNode = tilesNode.childNodes[anchoredNodeIndex] as HTMLElement;
this.anchoredBottom = bottom(this.anchoredNode!);
bottomNodeIndex = anchoredNodeIndex;
}
let topNodeIndex = findFirstNodeIndexAtOrBelow(tilesNode, scrollTop, bottomNodeIndex);
this.updateVisibleRange(topNodeIndex, bottomNodeIndex);
}
private updateVisibleRange(startIndex: number, endIndex: number) {
// can be undefined, meaning the tiles collection is still empty
const firstVisibleChild = this.tilesView!.getChildInstanceByIndex(startIndex);
const lastVisibleChild = this.tilesView!.getChildInstanceByIndex(endIndex);
this.value.setVisibleTileRange(firstVisibleChild?.value, lastVisibleChild?.value);
}
}
class TilesListView extends ListView<SimpleTile, TileView> {
private onChanged: () => void;
constructor(tiles: ObservableList<SimpleTile>, onChanged: () => void) {
const options = {
className: "Timeline bottom-aligned-scroll",
list: viewModel.tiles,
list: tiles,
onItemClick: (tileView, evt) => tileView.onClick(evt),
};
super(options, entry => {
@ -64,108 +209,10 @@ export class TimelineView extends ListView<SimpleTile, TileView> {
return new View(entry);
}
});
this._atBottom = false;
this._topLoadingPromise = undefined;
this._viewModel = viewModel;
this.onChanged = onChanged;
}
override handleEvent(evt: Event) {
if (evt.type === "scroll") {
this._handleScroll(evt);
} else {
super.handleEvent(evt);
}
}
async _loadAtTopWhile(predicate: () => boolean) {
if (this._topLoadingPromise) {
return;
}
try {
while (predicate()) {
// fill, not enough content to fill timeline
this._topLoadingPromise = this._viewModel.loadAtTop();
const shouldStop = await this._topLoadingPromise;
if (shouldStop) {
break;
}
}
}
catch (err) {
console.error(err);
//ignore error, as it is handled in the VM
}
finally {
this._topLoadingPromise = undefined;
}
}
async _handleScroll(evt: Event) {
const PAGINATE_OFFSET = 100;
const root = this.root();
if (root.scrollTop < PAGINATE_OFFSET && !this._topLoadingPromise && this._viewModel) {
// to calculate total amountGrown to check when we stop loading
let beforeContentHeight = root.scrollHeight;
// to adjust scrollTop every time
let lastContentHeight = beforeContentHeight;
// load until pagination offset is reached again
this._loadAtTopWhile(() => {
const contentHeight = root.scrollHeight;
const amountGrown = contentHeight - beforeContentHeight;
const topDiff = contentHeight - lastContentHeight;
root.scrollBy(0, topDiff);
lastContentHeight = contentHeight;
return amountGrown < PAGINATE_OFFSET;
});
}
}
override mount() {
const root = super.mount();
root.addEventListener("scroll", this);
return root;
}
override unmount() {
this.root().removeEventListener("scroll", this);
super.unmount();
}
override async loadList() {
super.loadList();
const root = this.root();
// yield so the browser can render the list
// and we can measure the content below
await Promise.resolve();
const {scrollHeight, clientHeight} = root;
if (scrollHeight > clientHeight) {
root.scrollTop = root.scrollHeight;
}
// load while viewport is not filled
this._loadAtTopWhile(() => {
const {scrollHeight, clientHeight} = root;
return scrollHeight <= clientHeight;
});
}
override onBeforeListChanged() {
const fromBottom = this._distanceFromBottom();
this._atBottom = fromBottom < 1;
}
_distanceFromBottom() {
const root = this.root();
return root.scrollHeight - root.scrollTop - root.clientHeight;
}
override onListChanged() {
const root = this.root();
if (this._atBottom) {
root.scrollTop = root.scrollHeight;
}
}
override onUpdate(index: number, value: SimpleTile, param: any) {
protected onUpdate(index: number, value: SimpleTile, param: any) {
if (param === "shape") {
const ExpectedClass = viewClassForEntry(value);
const child = this.getChildInstanceByIndex(index);
@ -178,5 +225,21 @@ export class TimelineView extends ListView<SimpleTile, TileView> {
}
}
super.onUpdate(index, value, param);
this.onChanged();
}
protected onAdd(idx: number, value: SimpleTile) {
super.onAdd(idx, value);
this.onChanged();
}
protected onRemove(idx: number, value: SimpleTile) {
super.onRemove(idx, value);
this.onChanged();
}
protected onMove(fromIdx: number, toIdx: number, value: SimpleTile) {
super.onMove(fromIdx, toIdx, value);
this.onChanged();
}
}

2
src/platform/web/ui/session/room/UnknownRoomView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
export class UnknownRoomView extends TemplateView {
render(t, vm) {

2
src/platform/web/ui/session/room/timeline/AnnouncementView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../../general/TemplateView.js";
import {TemplateView} from "../../../general/TemplateView";
export class AnnouncementView extends TemplateView {
render(t) {

4
src/platform/web/ui/session/room/timeline/BaseMessageView.js
View file

@ -16,9 +16,9 @@ limitations under the License.
*/
import {renderStaticAvatar} from "../../../avatar.js";
import {tag} from "../../../general/html.js";
import {tag} from "../../../general/html";
import {mountView} from "../../../general/utils";
import {TemplateView} from "../../../general/TemplateView.js";
import {TemplateView} from "../../../general/TemplateView";
import {Popup} from "../../../general/Popup.js";
import {Menu} from "../../../general/Menu.js";
import {ReactionsView} from "./ReactionsView.js";

12
src/platform/web/ui/session/room/timeline/GapView.js
View file

@ -14,19 +14,23 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../../general/TemplateView.js";
import {TemplateView} from "../../../general/TemplateView";
import {spinner} from "../../../common.js";
export class GapView extends TemplateView {
render(t, vm) {
render(t) {
const className = {
GapView: true,
isLoading: vm => vm.isLoading
isLoading: vm => vm.isLoading,
isAtTop: vm => vm.isAtTop,
};
return t.li({className}, [
spinner(t),
t.div(vm.i18n`Loading more messages …`),
t.div(vm => vm.isLoading ? vm.i18n`Loading more messages …` : vm.i18n`Not loading!`),
t.if(vm => vm.error, t => t.strong(vm => vm.error))
]);
}
/* This is called by the parent ListView, which just has 1 listener for the whole list */
onClick() {}
}

2
src/platform/web/ui/session/room/timeline/ReactionsView.js
View file

@ -15,7 +15,7 @@ limitations under the License.
*/
import {ListView} from "../../../general/ListView";
import {TemplateView} from "../../../general/TemplateView.js";
import {TemplateView} from "../../../general/TemplateView";
export class ReactionsView extends ListView {
constructor(reactionsViewModel) {

2
src/platform/web/ui/session/room/timeline/TextMessageView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {tag, text} from "../../../general/html.js";
import {tag, text} from "../../../general/html";
import {BaseMessageView} from "./BaseMessageView.js";
export class TextMessageView extends BaseMessageView {

2
src/platform/web/ui/session/settings/SessionBackupSettingsView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {StaticView} from "../../general/StaticView.js";
export class SessionBackupSettingsView extends TemplateView {

2
src/platform/web/ui/session/settings/SettingsView.js
View file

@ -14,7 +14,7 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
import {TemplateView} from "../../general/TemplateView.js";
import {TemplateView} from "../../general/TemplateView";
import {SessionBackupSettingsView} from "./SessionBackupSettingsView.js"
export class SettingsView extends TemplateView {

31
src/utils/EventEmitter.js → src/utils/EventEmitter.ts
View file

@ -1,5 +1,6 @@
/*
Copyright 2020 Bruno Windels <bruno@windels.cloud>
Copyright 2021 Daniel Fedorin <danila.fedorin@gmail.com>
Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
@ -14,28 +15,30 @@ See the License for the specific language governing permissions and
limitations under the License.
*/
export class EventEmitter {
type Handler<T> = (value?: T) => void;
export class EventEmitter<T> {
private _handlersByName: { [event in keyof T]?: Set<Handler<T[event]>> }
constructor() {
this._handlersByName = {};
}
emit(name, ...values) {
emit<K extends keyof T>(name: K, value?: T[K]): void {
const handlers = this._handlersByName[name];
if (handlers) {
for(const h of handlers) {
h(...values);
}
handlers.forEach(h => h(value));
}
}
disposableOn(name, callback) {
disposableOn<K extends keyof T>(name: K, callback: Handler<T[K]>): () => void {
this.on(name, callback);
return () => {
this.off(name, callback);
}
}
on(name, callback) {
on<K extends keyof T>(name: K, callback: Handler<T[K]>): void {
let handlers = this._handlersByName[name];
if (!handlers) {
this.onFirstSubscriptionAdded(name);
@ -44,27 +47,27 @@ export class EventEmitter {
handlers.add(callback);
}
off(name, callback) {
off<K extends keyof T>(name: K, callback: Handler<T[K]>): void {
const handlers = this._handlersByName[name];
if (handlers) {
handlers.delete(callback);
if (handlers.length === 0) {
if (handlers.size === 0) {
delete this._handlersByName[name];
this.onLastSubscriptionRemoved(name);
}
}
}
onFirstSubscriptionAdded(/* name */) {}
onFirstSubscriptionAdded<K extends keyof T>(name: K): void {}
onLastSubscriptionRemoved(/* name */) {}
onLastSubscriptionRemoved<K extends keyof T>(name: K): void {}
}
export function tests() {
return {
test_on_off(assert) {
let counter = 0;
const e = new EventEmitter();
const e = new EventEmitter<{ change: never }>();
const callback = () => counter += 1;
e.on("change", callback);
e.emit("change");
@ -75,7 +78,7 @@ export function tests() {
test_emit_value(assert) {
let value = 0;
const e = new EventEmitter();
const e = new EventEmitter<{ change: number }>();
const callback = (v) => value = v;
e.on("change", callback);
e.emit("change", 5);
@ -85,7 +88,7 @@ export function tests() {
test_double_on(assert) {
let counter = 0;
const e = new EventEmitter();
const e = new EventEmitter<{ change: never }>();
const callback = () => counter += 1;
e.on("change", callback);
e.on("change", callback);