支持全局主题颜色设置

src/App.vue

@@ -1,3 +1,15 @@
 <template>
   <router-view />
 </template>
+
+<script setup>
+import useSettingsStore from '@/store/modules/settings'
+import { handleThemeStyle } from '@/utils/theme'
+
+onMounted(() => {
+  nextTick(() => {
+    // 初始化主题样式
+    handleThemeStyle(useSettingsStore().theme)
+  })
+})
+</script>

src/layout/components/Settings/index.vue

@@ -87,6 +87,7 @@ import { useDynamicTitle } from '@/utils/dynamicTitle'
 import useAppStore from '@/store/modules/app'
 import useSettingsStore from '@/store/modules/settings'
 import usePermissionStore from '@/store/modules/permission'
+import { handleThemeStyle } from '@/utils/theme'
 
 const { proxy } = getCurrentInstance();
 const appStore = useAppStore()
@@ -143,6 +144,7 @@ const dynamicTitle = computed({
 function themeChange(val) {
   settingsStore.changeSetting({ key: 'theme', value: val })
   theme.value = val;
+  handleThemeStyle(val);
 }
 function handleTheme(val) {
   settingsStore.changeSetting({ key: 'sideTheme', value: val })

src/utils/theme.js

@@ -0,0 +1,49 @@
+// 处理主题样式
+export function handleThemeStyle(theme) {
+	document.documentElement.style.setProperty('--el-color-primary', theme)
+	for (let i = 1; i <= 9; i++) {
+		document.documentElement.style.setProperty(`--el-color-primary-light-${i}`, `${getLightColor(theme, i / 10)}`)
+	}
+	for (let i = 1; i <= 9; i++) {
+		document.documentElement.style.setProperty(`--el-color-primary-dark-${i}`, `${getDarkColor(theme, i / 10)}`)
+	}
+}
+
+// hex颜色转rgb颜色
+export function hexToRgb(str) {
+	str = str.replace('#', '')
+	let hexs = str.match(/../g)
+	for (let i = 0; i < 3; i++) {
+		hexs[i] = parseInt(hexs[i], 16)
+	}
+	return hexs
+}
+
+// rgb颜色转Hex颜色
+export function rgbToHex(r, g, b) {
+	let hexs = [r.toString(16), g.toString(16), b.toString(16)]
+	for (let i = 0; i < 3; i++) {
+		if (hexs[i].length == 1) {
+			hexs[i] = `0${hexs[i]}`
+		}
+	}
+	return `#${hexs.join('')}`
+}
+
+// 变浅颜色值
+export function getLightColor(color, level) {
+	let rgb = hexToRgb(color)
+	for (let i = 0; i < 3; i++) {
+		rgb[i] = Math.floor((255 - rgb[i]) * level + rgb[i])
+	}
+	return rgbToHex(rgb[0], rgb[1], rgb[2])
+}
+
+// 变深颜色值
+export function getDarkColor(color, level) {
+	let rgb = hexToRgb(color)
+	for (let i = 0; i < 3; i++) {
+		rgb[i] = Math.floor(rgb[i] * (1 - level))
+	}
+	return rgbToHex(rgb[0], rgb[1], rgb[2])
+}