From d05f4a891889dd69ccd0572c1e21c86a54e67dde Mon Sep 17 00:00:00 2001
From: yuetsh <517252939@qq.com>
Date: Mon, 25 May 2026 00:03:36 -0600
Subject: [PATCH] feat: add PinnedFlowchartPanel draggable component

---
 .../components/PinnedFlowchartPanel.vue       | 106 ++++++++++++++++++
 1 file changed, 106 insertions(+)
 create mode 100644 src/shared/components/PinnedFlowchartPanel.vue

diff --git a/src/shared/components/PinnedFlowchartPanel.vue b/src/shared/components/PinnedFlowchartPanel.vue
new file mode 100644
index 0000000..af86561
--- /dev/null
+++ b/src/shared/components/PinnedFlowchartPanel.vue
@@ -0,0 +1,106 @@
+<template>
+  <div
+    v-if="store.isPinned"
+    ref="panel"
+    class="pinned-panel"
+    :style="{ left: `${x}px`, top: `${y}px` }"
+  >
+    <n-card size="small" :content-style="collapsed ? 'display:none' : 'padding:8px'">
+      <template #header>
+        <div ref="handle" class="pinned-handle">
+          <n-flex align="center" :size="8">
+            <Icon icon="mdi:pin" style="font-size: 14px" />
+            <n-text strong style="font-size: 13px">流程图预览</n-text>
+          </n-flex>
+        </div>
+      </template>
+      <template #header-extra>
+        <n-flex :size="4">
+          <n-button quaternary size="small" @click="collapsed = !collapsed">
+            <template #icon>
+              <Icon :icon="collapsed ? 'mdi:chevron-up' : 'mdi:chevron-down'" />
+            </template>
+          </n-button>
+          <n-button quaternary size="small" @click="store.unpin()">
+            <template #icon>
+              <Icon icon="mdi:close" />
+            </template>
+          </n-button>
+        </n-flex>
+      </template>
+      <n-alert v-if="renderError" type="error" title="渲染失败" size="small">
+        {{ renderError }}
+      </n-alert>
+      <div v-else ref="mermaidContainer" class="mermaid-area"></div>
+    </n-card>
+  </div>
+</template>
+
+<script setup lang="ts">
+import { Icon } from "@iconify/vue"
+import { usePinnedFlowchartStore } from "shared/store/pinnedFlowchart"
+import { useMermaid } from "shared/composables/useMermaid"
+
+const store = usePinnedFlowchartStore()
+const { renderError, renderFlowchart } = useMermaid()
+
+const panelRef = useTemplateRef<HTMLElement>("panel")
+const handleRef = useTemplateRef<HTMLElement>("handle")
+const mermaidContainer = useTemplateRef<HTMLElement>("mermaidContainer")
+const collapsed = ref(false)
+
+const { x, y } = useDraggable(panelRef, {
+  handle: handleRef,
+  initialValue: {
+    x: window.innerWidth - 440,
+    y: window.innerHeight - 400,
+  },
+})
+
+watch(
+  () => store.mermaidCode,
+  async (code) => {
+    if (!code || collapsed.value) return
+    await nextTick()
+    await renderFlowchart(mermaidContainer.value, code)
+  },
+  { immediate: true },
+)
+
+watch(collapsed, async (val) => {
+  if (!val && store.mermaidCode) {
+    await nextTick()
+    await renderFlowchart(mermaidContainer.value, store.mermaidCode)
+  }
+})
+</script>
+
+<style scoped>
+.pinned-panel {
+  position: fixed;
+  z-index: 1000;
+  width: 420px;
+}
+
+.pinned-handle {
+  cursor: grab;
+  user-select: none;
+}
+
+.pinned-handle:active {
+  cursor: grabbing;
+}
+
+.mermaid-area {
+  height: 340px;
+  display: flex;
+  justify-content: center;
+  align-items: center;
+  overflow: hidden;
+}
+
+:deep(.mermaid-area > svg) {
+  max-width: 100%;
+  max-height: 100%;
+}
+</style>