From 3f525c64572af0403c08663314173195b5a240b3 Mon Sep 17 00:00:00 2001
From: jxxghp <jxxghp@gmail.com>
Date: Tue, 30 Jun 2026 14:17:04 +0800
Subject: [PATCH] fix: adjust dialog fullscreen breakpoint by width

---
 src/components/dialog/AppDialog.ts | 89 ++++++++++++++++++++++++++++++
 src/plugins/vuetify/index.ts       |  2 +
 2 files changed, 91 insertions(+)
 create mode 100644 src/components/dialog/AppDialog.ts

diff --git a/src/components/dialog/AppDialog.ts b/src/components/dialog/AppDialog.ts
new file mode 100644
index 00000000..5d7dd6fc
--- /dev/null
+++ b/src/components/dialog/AppDialog.ts
@@ -0,0 +1,89 @@
+import { defineComponent, h } from 'vue'
+import { useDisplay } from 'vuetify'
+import { VDialog as VuetifyDialog } from 'vuetify/components/VDialog'
+
+const DEFAULT_ROOT_FONT_SIZE = 16
+
+/**
+ * 判断传入的 fullscreen 属性是否已请求全屏展示。
+ */
+function isFullscreenRequested(value: unknown) {
+  return value !== undefined && value !== null && value !== false
+}
+
+/**
+ * 获取文档根字号，用于把 rem/em 宽度限制换算成像素。
+ */
+function getRootFontSize() {
+  if (typeof window === 'undefined') return DEFAULT_ROOT_FONT_SIZE
+
+  const rootFontSize = Number.parseFloat(window.getComputedStyle(document.documentElement).fontSize)
+  return Number.isFinite(rootFontSize) ? rootFontSize : DEFAULT_ROOT_FONT_SIZE
+}
+
+/**
+ * 将弹窗宽度限制换算成像素，无法可靠解析的复杂表达式返回空值。
+ */
+function parseDialogWidthLimit(value: unknown, viewportWidth: number) {
+  if (typeof value === 'number') return Number.isFinite(value) ? value : undefined
+  if (typeof value !== 'string') return undefined
+
+  const trimmedValue = value.trim()
+  if (!trimmedValue) return undefined
+
+  const numericValue = Number(trimmedValue)
+  if (Number.isFinite(numericValue)) return numericValue
+
+  const lengthMatch = trimmedValue.match(/^(-?\d*\.?\d+)(px|rem|em|vw|%)$/i)
+  if (!lengthMatch) return undefined
+
+  const [, rawAmount, rawUnit] = lengthMatch
+  const amount = Number(rawAmount)
+  if (!Number.isFinite(amount)) return undefined
+
+  const unit = rawUnit.toLowerCase()
+  if (unit === 'px') return amount
+  if (unit === 'rem' || unit === 'em') return amount * getRootFontSize()
+  if (unit === 'vw') return (viewportWidth * amount) / 100
+  if (unit === '%') return (viewportWidth * amount) / 100
+
+  return undefined
+}
+
+/**
+ * 根据 maxWidth 与 width 的有效上限，收窄 fullscreen 的生效宽度。
+ */
+function resolveFullscreen(
+  fullscreen: unknown,
+  maxWidth: unknown,
+  width: unknown,
+  viewportWidth: number,
+) {
+  if (!isFullscreenRequested(fullscreen)) return false
+
+  const widthLimits = [maxWidth, width]
+    .map(value => parseDialogWidthLimit(value, viewportWidth))
+    .filter((value): value is number => value !== undefined)
+
+  if (!widthLimits.length) return true
+
+  return viewportWidth <= Math.min(...widthLimits)
+}
+
+export default defineComponent({
+  name: 'AppDialog',
+  inheritAttrs: false,
+  /**
+   * 渲染项目统一弹窗，并在宽度上限小于移动全屏断点时收窄 fullscreen 条件。
+   */
+  setup(_, { attrs, slots }) {
+    const display = useDisplay()
+
+    return () => {
+      const maxWidth = attrs.maxWidth ?? attrs['max-width']
+      const resolvedFullscreen = resolveFullscreen(attrs.fullscreen, maxWidth, attrs.width, display.width.value)
+
+      return h(VuetifyDialog, { ...attrs, fullscreen: resolvedFullscreen }, slots)
+    }
+  },
+})
diff --git a/src/plugins/vuetify/index.ts b/src/plugins/vuetify/index.ts
index a54176a8..0b21c0d3 100644
--- a/src/plugins/vuetify/index.ts
+++ b/src/plugins/vuetify/index.ts
@@ -2,6 +2,7 @@ import { createVuetify } from 'vuetify'
 import * as components from 'vuetify/components'
 import { VBtn } from 'vuetify/components/VBtn'
 import * as labsComponents from 'vuetify/labs/components'
+import AppDialog from '@/components/dialog/AppDialog'
 import defaults from './defaults'
 import { icons } from './icons'
 import theme from './theme'
@@ -15,6 +16,7 @@ export default createVuetify({
   theme,
   components: {
     ...components,
+    VDialog: AppDialog,
     ...labsComponents,
   },
 })