feat: add switch to manually change theme from light to dark (#291)

This requires `auto` default theme

package.json

@@ -34,7 +34,7 @@
     "node-sass": "^8.0.0",
     "prettier": "^2.8.1",
     "riot": "^7.1.0",
-    "riot-mui": "github:joxit/riot-5-mui#a9b0ce4",
+    "riot-mui": "github:joxit/riot-5-mui#a97f2d3",
     "rollup": "^3.9.0",
     "rollup-plugin-app-utils": "^1.0.6",
     "rollup-plugin-copy": "^3.4.0",

src/components/docker-registry-ui.riot

@@ -101,6 +101,19 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
         <li>
           <a href="https://github.com/Joxit/docker-registry-ui/blob/main/LICENSE">License AGPL-3.0</a>
         </li>
+        <li if="{ props.theme === 'auto' }">
+          <material-switch
+            on-change="{ onThemeChange }"
+            checked="{ state.themeSwitch }"
+            track-selected-color="var(--accent-text)"
+            outline-selected-color="var(--accent-text)"
+          >
+            <i slot="thumb-icon" class="material-icons" style="color: white; font-size: 0.75em">wb_sunny</i>
+            <i slot="thumb-selected-icon" class="material-icons" style="color: #79747e; font-size: 0.75em">
+              brightness_2
+            </i>
+          </material-switch>
+        </li>
       </ul>
     </material-footer>
   </footer>
@@ -156,7 +169,8 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
         this.state.catalogElementsLimit = props.catalogElementsLimit || 100000;
         this.state.pullUrl = this.pullUrl(this.state.registryUrl, props.pullUrl);
         this.state.useControlCacheHeader = props.useControlCacheHeader;
-        loadTheme(props, this.root.parentNode.style);
+        const theme = loadTheme(props, this.root.parentNode.style);
+        this.state.themeSwitch = theme === 'dark';
       },
       onServerChange(registryUrl) {
         this.update({
@@ -216,6 +230,11 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
           filter: value,
         });
       },
+      onThemeChange(e) {
+        const theme = e.target.checked ? 'dark' : 'light';
+        loadTheme({ ...this.props, theme }, this.root.parentNode.style);
+        this.update({ themeSwitch: e.target.checked });
+      },
       baseRoute: '([^#]*?)/(\\?[^#]*?)?(#!)?(/?)',
       router,
       version,
@@ -245,5 +264,9 @@ along with this program. If not, see <http://www.gnu.org/licenses/>.
     material-footer .material-footer-logo {
       color: var(--footer-text);
     }
+
+    material-switch i {
+      user-select: none;
+    }
   </style>
 </docker-registry-ui>

src/index.js

@@ -13,6 +13,7 @@ import {
   MaterialDropdown,
   MaterialPopup,
   MaterialInput,
+  MaterialSwitch,
 } from 'riot-mui';
 
 import DockerRegistryUI from './components/docker-registry-ui.riot';
@@ -31,6 +32,7 @@ register('material-tabs', MaterialTabs);
 register('material-dropdown', MaterialDropdown);
 register('material-popup', MaterialPopup);
 register('material-input', MaterialInput);
+register('material-switch', MaterialSwitch);
 
 const createApp = component(DockerRegistryUI);
 const tags = document.getElementsByTagName('docker-registry-ui');

src/scripts/theme.js

@@ -23,6 +23,8 @@ const DARK_THEME = {
   'footer-background': '#555',
 };
 
+const LOCAL_STORAGE_THEME = 'registryUiTheme';
+
 let THEME;
 
 const normalizeKey = (k) =>
@@ -33,19 +35,30 @@ const normalizeKey = (k) =>
 
 const preferDarkMode = ({ theme }) => {
   if (theme === 'auto') {
-    if (typeof window.matchMedia === 'function') {
-      const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)');
-      return prefersDarkScheme && prefersDarkScheme.matches;
+    switch (localStorage.getItem(LOCAL_STORAGE_THEME)) {
+      case 'dark':
+        return true;
+      case 'light':
+        return false;
+      default:
+        if (typeof window.matchMedia === 'function') {
+          const prefersDarkScheme = window.matchMedia('(prefers-color-scheme: dark)');
+          return prefersDarkScheme && prefersDarkScheme.matches;
+        }
     }
   }
   return theme === 'dark';
 };
 
 export const loadTheme = (props, style) => {
-  THEME = preferDarkMode(props) ? DARK_THEME : LIGHT_THEME;
+  const isDarkMode = preferDarkMode(props);
+  THEME = isDarkMode ? { ...DARK_THEME } : { ...LIGHT_THEME };
   Object.entries(props)
     .filter(([k, v]) => v && /^theme[A-Z]/.test(k))
     .map(([k, v]) => [normalizeKey(k), v])
     .forEach(([k, v]) => (THEME[k] = v));
   Object.entries(THEME).forEach(([k, v]) => style.setProperty(`--${k}`, v));
+  const theme = isDarkMode ? 'dark' : 'light';
+  localStorage.setItem(LOCAL_STORAGE_THEME, theme);
+  return theme;
 };

src/style.scss

@@ -26,6 +26,7 @@
 @import 'riot-mui/src/material-elements/material-dropdown/material-dropdown.scss';
 @import 'riot-mui/src/material-elements/material-popup/material-popup.scss';
 @import 'riot-mui/src/material-elements/material-input/material-input.scss';
+@import 'riot-mui/src/material-elements/material-switch/material-switch.scss';
 
 @import './roboto.scss';
 @import './material-icons.scss';
@@ -340,6 +341,9 @@ main {
 
 material-footer {
   padding: 0.5em 1em;
+  li {
+    align-self: center;
+  }
 }
 
 .copy-to-clipboard {