119 lines
3.1 KiB
TypeScript
119 lines
3.1 KiB
TypeScript
/*
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Copyright 2025 Google LLC
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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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https://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 { html, css, nothing } from "lit";
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import { customElement, property } from "lit/decorators.js";
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import { Root } from "./root.js";
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import { StringValue } from "../types/primitives.js";
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import { classMap } from "lit/directives/class-map.js";
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import { A2uiMessageProcessor } from "../data/model-processor.js";
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import { styleMap } from "lit/directives/style-map.js";
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import { structuralStyles } from "./styles.js";
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import { ResolvedImage } from "../types/types.js";
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import { Styles } from "../index.js";
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@customElement("a2ui-image")
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export class Image extends Root {
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@property()
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accessor url: StringValue | null = null;
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@property()
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accessor usageHint: ResolvedImage["usageHint"] | null = null;
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@property()
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accessor fit: "contain" | "cover" | "fill" | "none" | "scale-down" | null = null;
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static styles = [
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structuralStyles,
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css`
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* {
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box-sizing: border-box;
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}
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:host {
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display: block;
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flex: var(--weight);
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min-height: 0;
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overflow: auto;
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}
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img {
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display: block;
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width: 100%;
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height: 100%;
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object-fit: var(--object-fit, fill);
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}
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`,
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];
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#renderImage() {
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if (!this.url) {
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return nothing;
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}
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const render = (url: string) => {
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return html`<img src=${url} />`;
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};
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if (this.url && typeof this.url === "object") {
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if ("literalString" in this.url) {
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const imageUrl = this.url.literalString ?? "";
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return render(imageUrl);
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} else if ("literal" in this.url) {
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const imageUrl = this.url.literal ?? "";
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return render(imageUrl);
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} else if (this.url && "path" in this.url && this.url.path) {
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if (!this.processor || !this.component) {
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return html`(no model)`;
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}
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const imageUrl = this.processor.getData(
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this.component,
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this.url.path,
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this.surfaceId ?? A2uiMessageProcessor.DEFAULT_SURFACE_ID
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);
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if (!imageUrl) {
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return html`Invalid image URL`;
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}
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if (typeof imageUrl !== "string") {
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return html`Invalid image URL`;
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}
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return render(imageUrl);
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}
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}
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return html`(empty)`;
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}
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render() {
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const classes = Styles.merge(
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this.theme.components.Image.all,
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this.usageHint ? this.theme.components.Image[this.usageHint] : {}
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);
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return html`<section
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class=${classMap(classes)}
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style=${styleMap({
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...(this.theme.additionalStyles?.Image ?? {}),
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"--object-fit": this.fit ?? "fill",
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})}
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>
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${this.#renderImage()}
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</section>`;
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}
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}
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