feat: icon image (#377)

Signed-off-by: Philippe Martin <[email protected]>

Author: feloy

packages/webview/src/component/icons/IconImage.spec.ts

@@ -0,0 +1,56 @@
+/**********************************************************************
+ * Copyright (C) 2023-2025 Red Hat, Inc.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ * http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ ***********************************************************************/
+
+import '@testing-library/jest-dom/vitest';
+
+import { render } from '@testing-library/svelte';
+import { expect, test } from 'vitest';
+
+import IconImage from './IconImage.svelte';
+
+test('Expect valid source and alt text with dark mode', async () => {
+  const image = render(IconImage, { image: { light: 'light.png', dark: 'dark.png' }, alt: 'this is alt text' });
+
+  const imageElement = image.getByRole('img');
+
+  expect(imageElement).toHaveAttribute('src', 'dark.png');
+  expect(imageElement).toHaveAttribute('alt', 'this is alt text');
+
+  await image.rerender({ image: { light: 'light2.png', dark: 'dark2.png' }, alt: 'this is another alt text' });
+  expect(imageElement).toHaveAttribute('src', 'dark2.png');
+});
+
+test('Expect no alt attribute if missing and default image', async () => {
+  const image = render(IconImage, { image: 'image.png' });
+
+  const imageElement = image.getByRole('img');
+  expect(imageElement).toHaveAttribute('src', 'image.png');
+  expect(imageElement).not.toHaveAttribute('alt');
+});
+
+test('Expect string as image', async () => {
+  const image = render(IconImage, { image: 'image1', alt: 'this is alt text' });
+
+  const imageElement = image.getByRole('img');
+
+  expect(imageElement).toHaveAttribute('src', 'image1');
+  expect(imageElement).toHaveAttribute('alt', 'this is alt text');
+
+  await image.rerender({ image: 'image2', alt: 'this is another alt text' });
+  expect(imageElement).toHaveAttribute('src', 'image2');
+});

packages/webview/src/component/icons/IconImage.svelte

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+<script lang="ts">
+import type { Snippet } from 'svelte';
+
+type Image = string | { light: string; dark: string };
+
+interface Props {
+  image?: Image;
+  alt?: string;
+  class?: string;
+  children?: Snippet;
+}
+let { image, alt, class: className, children }: Props = $props();
+
+let imgSrc = $state<string>();
+
+$effect(() => {
+  image;
+  getImgSrc(image);
+});
+
+function getImage(icon?: Image): string | undefined {
+  if (!icon) {
+    return undefined;
+  }
+
+  if (typeof icon === 'string') {
+    return icon;
+  }
+
+  // TODO: add light/dark mode support (https://github.com/podman-desktop/extension-kubernetes-dashboard/issues/369)
+  if (/*isDarkTheme &&*/ icon.dark) {
+    return icon.dark;
+  } else if (/*!isDarkTheme &&*/ icon.light) {
+    return icon.light;
+  }
+  return undefined;
+}
+
+function getImgSrc(image: string | { light: string; dark: string } | undefined): void {
+  imgSrc = getImage(image);
+}
+</script>
+
+{#if imgSrc}
+  <img src={imgSrc} alt={alt} class={className} />
+{:else}
+  {@render children?.()}
+{/if}