forked from mystiq/hydrogen-web
102 lines
3.2 KiB
JavaScript
102 lines
3.2 KiB
JavaScript
/*
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Copyright 2021 The Matrix.org Foundation C.I.C.
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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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import {BaseUpdateView} from "./general/BaseUpdateView";
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import {renderStaticAvatar, renderImg} from "./avatar";
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/*
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optimization to not use a sub view when changing between img and text
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because there can be many many instances of this view
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*/
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export class AvatarView extends BaseUpdateView {
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/**
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* @param {ViewModel} value view model with {avatarUrl, avatarColorNumber, avatarTitle, avatarLetter}
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* @param {Number} size
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*/
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constructor(value, size) {
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super(value);
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this._root = null;
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this._avatarUrl = null;
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this._avatarTitle = null;
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this._avatarLetter = null;
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this._size = size;
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}
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_avatarUrlChanged() {
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if (this.value.avatarUrl(this._size) !== this._avatarUrl) {
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this._avatarUrl = this.value.avatarUrl(this._size);
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return true;
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}
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return false;
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}
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_avatarTitleChanged() {
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if (this.value.avatarTitle !== this._avatarTitle) {
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this._avatarTitle = this.value.avatarTitle;
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return true;
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}
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return false;
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}
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_avatarLetterChanged() {
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if (this.value.avatarLetter !== this._avatarLetter) {
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this._avatarLetter = this.value.avatarLetter;
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return true;
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}
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return false;
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}
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mount(options) {
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this._avatarUrlChanged();
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this._avatarLetterChanged();
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this._avatarTitleChanged();
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this._root = renderStaticAvatar(this.value, this._size);
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// takes care of update being called when needed
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this.subscribeOnMount(options);
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return this._root;
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}
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root() {
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return this._root;
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}
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update(vm) {
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// important to always call _...changed for every prop
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if (this._avatarUrlChanged()) {
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// avatarColorNumber won't change, it's based on room/user id
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const bgColorClass = `usercolor${vm.avatarColorNumber}`;
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if (vm.avatarUrl(this._size)) {
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this._root.replaceChild(renderImg(vm, this._size), this._root.firstChild);
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this._root.classList.remove(bgColorClass);
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} else {
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this._root.textContent = vm.avatarLetter;
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this._root.classList.add(bgColorClass);
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}
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}
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const hasAvatar = !!vm.avatarUrl(this._size);
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if (this._avatarTitleChanged() && hasAvatar) {
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const element = this._root.firstChild;
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if (element.tagName === "IMG") {
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element.setAttribute("title", vm.avatarTitle);
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}
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}
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if (this._avatarLetterChanged() && !hasAvatar) {
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this._root.textContent = vm.avatarLetter;
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}
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}
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}
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