From e31578ee108a2f9efe48120f52f79fb3a0457123 Mon Sep 17 00:00:00 2001
From: SunWuyuan <sun@wuyuan.dev>
Date: Sat, 1 Mar 2025 20:31:34 +0800
Subject: [PATCH] 1

---
 package.json           |   2 +-
 src/pages/settings.vue | 688 +++++++++++++++++++++++++++++++++--------
 2 files changed, 565 insertions(+), 125 deletions(-)

diff --git a/package.json b/package.json
index 7199541..784dfef 100644
--- a/package.json
+++ b/package.json
@@ -4,7 +4,7 @@
   "type": "module",
   "version": "0.0.0",
   "scripts": {
-    "dev": "vite",
+    "dev": "vite --host",
     "build": "vite build",
     "preview": "vite preview",
     "lint": "eslint . --fix"
diff --git a/src/pages/settings.vue b/src/pages/settings.vue
index 9c7e1b3..38dd6c8 100644
--- a/src/pages/settings.vue
+++ b/src/pages/settings.vue
@@ -1,58 +1,253 @@
 <template>
-  <v-app-bar>
+  <v-app-bar elevation="1">
     <template #prepend>
-      <v-btn icon="mdi-arrow-left" variant="text" @click="$router.push('/')" />
+      <v-btn
+        icon="mdi-arrow-left"
+        variant="text"
+        @click="$router.push('/')"
+        class="mr-2"
+      />
     </template>
-    <v-app-bar-title>设置</v-app-bar-title>
+    <v-app-bar-title class="text-h6 font-weight-medium">设置</v-app-bar-title>
   </v-app-bar>
 
-  <v-container>
+  <v-container class="py-4">
     <v-row>
-      <v-col cols="12">
-        <v-card>
-          <v-card-title>服务器设置</v-card-title>
+      <v-col cols="12" md="6">
+        <v-card elevation="2" class="rounded-lg">
+          <v-card-item>
+            <template v-slot:prepend>
+              <v-icon icon="mdi-server" size="large" class="mr-2" />
+            </template>
+            <v-card-title class="text-h6">服务器设置</v-card-title>
+          </v-card-item>
+          
           <v-card-text>
             <v-text-field
               v-model="serverDomain"
               label="服务器域名"
               placeholder="例如: http://example.com"
+              prepend-inner-icon="mdi-web"
+              variant="outlined"
+              density="comfortable"
+              class="mb-4"
               required
             />
             <v-text-field
               v-model="classNumber"
               label="班号"
               placeholder="例如: 1 或 A"
+              prepend-inner-icon="mdi-account-group"
+              variant="outlined"
+              density="comfortable"
               required
               :rules="[v => !!v || '班号不能为空', v => /^[A-Za-z0-9]+$/.test(v) || '班号只能包含字母和数字']"
             />
-            <v-btn color="primary" @click="saveServerSettings">保存</v-btn>
           </v-card-text>
+
+          <v-card-actions class="px-4 pb-4">
+            <v-btn
+              color="primary"
+              prepend-icon="mdi-content-save"
+              block
+              @click="saveServerSettings"
+            >
+              保存设置
+            </v-btn>
+          </v-card-actions>
         </v-card>
       </v-col>
 
-      <v-col cols="12">
-        <v-card>
-          <v-card-title class="d-flex align-center">
-            学生列表设置
-            <v-spacer />
+      
+
+      <v-col cols="12" md="6">
+        <v-card elevation="2" class="rounded-lg">
+          <v-card-item>
+            <template v-slot:prepend>
+              <v-icon icon="mdi-refresh" size="large" class="mr-2" />
+            </template>
+            <v-card-title class="text-h6">自动刷新设置（不建议启用）</v-card-title>
+          </v-card-item>
+          
+          <v-card-text>
+            <v-switch
+              v-model="autoRefresh"
+              label="启用自动刷新"
+              color="primary"
+              hide-details
+              class="mb-4"
+            />
+            <v-text-field
+              v-model="refreshInterval"
+              type="number"
+              label="刷新间隔"
+              suffix="秒"
+              :disabled="!autoRefresh"
+              variant="outlined"
+              density="comfortable"
+              :rules="[
+                v => v >= 10 || '刷新间隔不能小于10秒',
+                v => v <= 3600 || '刷新间隔不能大于3600秒'
+              ]"
+            />
+          </v-card-text>
+
+          <v-card-actions class="px-4 pb-4">
             <v-btn
-              variant="text"
-              prepend-icon="mdi-code-braces"
-              @click="showAdvancedEdit = !showAdvancedEdit"
+              color="primary"
+              prepend-icon="mdi-content-save"
+              block
+              @click="saveRefreshSettings"
             >
-              {{ showAdvancedEdit ? '基础编辑' : '高级编辑' }}
+              保存设置
             </v-btn>
-          </v-card-title>
+          </v-card-actions>
+        </v-card>
+      </v-col>
+
+      <v-col cols="12" md="6">
+        <v-card elevation="2" class="rounded-lg">
+          <v-card-item>
+            <template v-slot:prepend>
+              <v-icon icon="mdi-format-size" size="large" class="mr-2" />
+            </template>
+            <v-card-title class="text-h6">字体设置</v-card-title>
+          </v-card-item>
+          
+          <v-card-text>
+            <v-text-field
+              v-model="fontSize"
+              type="number"
+              label="字体大小"
+              suffix="px"
+              variant="outlined"
+              density="comfortable"
+              class="mb-4"
+              :rules="[
+                v => v >= 16 || '字体大小不能小于16px',
+                v => v <= 100 || '字体大小不能大于100px'
+              ]"
+            />
+          </v-card-text>
+
+          <v-card-actions class="px-4 pb-4">
+            <v-btn
+              color="error"
+              variant="outlined"
+              prepend-icon="mdi-refresh"
+              class="flex-grow-1"
+              @click="resetFontSize"
+            >
+              重置
+            </v-btn>
+            <v-btn
+              color="primary"
+              prepend-icon="mdi-content-save"
+              class="flex-grow-1"
+              @click="saveFontSize"
+            >
+              保存设置
+            </v-btn>
+          </v-card-actions>
+        </v-card>
+      </v-col>
+
+      <v-col cols="12" md="6">
+        <v-card elevation="2" class="rounded-lg">
+          <v-card-item>
+            <template v-slot:prepend>
+              <v-icon icon="mdi-pencil-cog" size="large" class="mr-2" />
+            </template>
+            <v-card-title class="text-h6">编辑设置</v-card-title>
+          </v-card-item>
+          
+          <v-card-text>
+            <v-switch
+              v-model="autoSave"
+              label="启用自动保存"
+              color="primary"
+              hide-details
+              class="mb-4"
+            >
+              <template v-slot:append>
+                <v-tooltip location="right">
+                  <template v-slot:activator="{ props }">
+                    <v-icon
+                      v-bind="props"
+                      icon="mdi-help-circle-outline"
+                      size="small"
+                      class="ml-2"
+                    />
+                  </template>
+                  编辑完成后自动上传到服务器
+                </v-tooltip>
+              </template>
+            </v-switch>
+
+            <v-switch
+              v-model="refreshBeforeEdit"
+              label="编辑前自动刷新"
+              color="primary"
+              hide-details
+            >
+              <template v-slot:append>
+                <v-tooltip location="right">
+                  <template v-slot:activator="{ props }">
+                    <v-icon
+                      v-bind="props"
+                      icon="mdi-help-circle-outline"
+                      size="small"
+                      class="ml-2"
+                    />
+                  </template>
+                  打开编辑框前自动从服务器获取最新数据
+                </v-tooltip>
+              </template>
+            </v-switch>
+          </v-card-text>
+
+          <v-card-actions class="px-4 pb-4">
+            <v-btn
+              color="primary"
+              prepend-icon="mdi-content-save"
+              block
+              @click="saveEditSettings"
+            >
+              保存设置
+            </v-btn>
+          </v-card-actions>
+        </v-card>
+      </v-col>
+      <v-col cols="12">
+        <v-card elevation="2" class="rounded-lg">
+          <v-card-item>
+            <template v-slot:prepend>
+              <v-icon icon="mdi-account-multiple" size="large" class="mr-2" />
+            </template>
+            <v-card-title class="text-h6">学生列表设置</v-card-title>
+            <template v-slot:append>
+              <v-btn
+                :color="showAdvancedEdit ? 'primary' : undefined"
+                variant="text"
+                prepend-icon="mdi-code-braces"
+                @click="showAdvancedEdit = !showAdvancedEdit"
+              >
+                {{ showAdvancedEdit ? '返回基础编辑' : '高级编辑' }}
+              </v-btn>
+            </template>
+          </v-card-item>
 
           <v-card-text>
             <v-expand-transition>
               <div v-if="!showAdvancedEdit">
-                <v-row class="mb-4">
+                <v-row class="mb-6">
                   <v-col cols="12" sm="6" md="4">
                     <v-text-field
                       v-model="newStudent"
                       label="添加学生"
-                      placeholder="输入学生姓名"
+                      placeholder="输入学生姓名后回车添加"
+                      prepend-inner-icon="mdi-account-plus"
+                      variant="outlined"
                       hide-details
                       @keyup.enter="addStudent"
                     >
@@ -60,6 +255,7 @@
                         <v-btn
                           icon="mdi-plus"
                           variant="text"
+                          color="primary"
                           :disabled="!newStudent.trim()"
                           @click="addStudent"
                         />
@@ -77,134 +273,162 @@
                     md="4"
                     lg="3"
                   >
-                    <v-card variant="outlined" class="student-card">
-                      <v-card-text class="d-flex align-center">
-                        <span class="mr-2">{{ index + 1 }}.</span>
-                        <span class="text-body-1 flex-grow-1">{{ student }}</span>
-                        <v-btn
-                          icon="mdi-delete"
-                          variant="text"
-                          color="error"
-                          size="small"
-                          @click="removeStudent(index)"
-                        />
-                      </v-card-text>
-                    </v-card>
+                    <v-hover v-slot="{ isHovering, props }">
+                      <v-card
+                        v-bind="props"
+                        :elevation="isMobile ? 1 : (isHovering ? 4 : 1)"
+                        :class="[
+                          'student-card',
+                          {
+                            'bg-primary-subtle': isHovering && !isMobile,
+                            'mobile': isMobile
+                          }
+                        ]"
+                        border
+                      >
+                        <v-card-text class="d-flex align-center pa-3">
+                          <v-menu
+                            location="bottom"
+                            :open-on-hover="!isMobile"
+                            :open-on-long-press="isMobile"
+                          >
+                            <template v-slot:activator="{ props: menuProps }">
+                              <v-btn
+                                variant="tonal"
+                                size="small"
+                                class="mr-3 font-weight-medium"
+                                v-bind="menuProps"
+                              >
+                                {{ index + 1 }}
+                              </v-btn>
+                            </template>
+                            <v-list density="compact" nav>
+                              <v-list-item
+                                prepend-icon="mdi-arrow-up-bold"
+                                :disabled="index === 0"
+                                @click="moveToTop(index)"
+                              >
+                                置顶
+                              </v-list-item>
+                              <v-divider />
+                              <v-list-item
+                                prepend-icon="mdi-arrow-up"
+                                :disabled="index === 0"
+                                @click="moveStudent(index, 'up')"
+                              >
+                                上移
+                              </v-list-item>
+                              <v-list-item
+                                prepend-icon="mdi-arrow-down"
+                                :disabled="index === studentsList.length - 1"
+                                @click="moveStudent(index, 'down')"
+                              >
+                                下移
+                              </v-list-item>
+                              <v-divider />
+                              <v-list-item
+                                prepend-icon="mdi-format-list-numbered"
+                                @click="setStudentNumber(index)"
+                              >
+                                设置序号
+                              </v-list-item>
+                            </v-list>
+                          </v-menu>
+
+                          <v-text-field
+                            v-if="editingIndex === index"
+                            v-model="editingName"
+                            density="compact"
+                            variant="underlined"
+                            hide-details
+                            class="flex-grow-1"
+                            @keyup.enter="saveEdit"
+                            @blur="saveEdit"
+                            autofocus
+                          />
+                          <span
+                            v-else
+                            class="text-body-1 flex-grow-1"
+                            @click="isMobile ? startEdit(index, student) : null"
+                            @dblclick="!isMobile ? startEdit(index, student) : null"
+                          >
+                            {{ student }}
+                          </span>
+
+                          <div 
+                            class="d-flex gap-1 action-buttons"
+                            :class="{'opacity-100': isHovering || isMobile}"
+                          >
+                            <v-btn
+                              icon="mdi-pencil"
+                              variant="text"
+                              color="primary"
+                              size="small"
+                              @click="startEdit(index, student)"
+                            />
+                            <v-btn
+                              icon="mdi-delete"
+                              variant="text"
+                              color="error"
+                              size="small"
+                              @click="confirmDelete(index)"
+                            />
+                          </div>
+                        </v-card-text>
+                      </v-card>
+                    </v-hover>
                   </v-col>
                 </v-row>
               </div>
             </v-expand-transition>
 
             <v-expand-transition>
-              <div v-if="showAdvancedEdit">
+              <div v-if="showAdvancedEdit" class="pt-2">
                 <v-textarea
                   v-model="students"
-                  label="学生列表（每行一个名字）"
+                  label="批量编辑学生列表"
+                  placeholder="每行输入一个学生姓名"
                   hint="使用文本编辑模式批量编辑学生名单"
                   persistent-hint
+                  variant="outlined"
+                  rows="10"
                 />
               </div>
             </v-expand-transition>
 
-            <v-row class="mt-4">
+            <v-row class="mt-6">
               <v-col cols="12" class="d-flex gap-2">
                 <v-btn
                   color="primary"
                   prepend-icon="mdi-content-save"
+                  size="large"
                   @click="saveStudents"
                 >
-                  保存
+                  保存学生列表
                 </v-btn>
                 <v-btn
                   color="error"
                   variant="outlined"
                   prepend-icon="mdi-refresh"
+                  size="large"
                   @click="reloadStudentList"
                 >
-                  重置
+                  重置列表
                 </v-btn>
               </v-col>
             </v-row>
           </v-card-text>
         </v-card>
       </v-col>
-
       <v-col cols="12">
-        <v-card disabled>
-          <v-card-title>自动刷新设置</v-card-title>
-          <v-card-text>
-            <v-switch v-model="autoRefresh" label="启用自动刷新"/>
-            <v-text-field
-              v-model="refreshInterval"
-              type="number"
-              label="刷新间隔(秒)"
-              :disabled="!autoRefresh"
-            />
-            <v-btn color="primary" @click="saveRefreshSettings">保存</v-btn>
-          </v-card-text>
-        </v-card>
-      </v-col>
+        <v-card elevation="2" class="rounded-lg">
+          <v-card-item>
+            <template v-slot:prepend>
+              <v-icon icon="mdi-information" size="large" class="mr-2" />
+            </template>
+            <v-card-title class="text-h6">关于</v-card-title>
+          </v-card-item>
 
-      <v-col cols="12">
-        <v-card>
-          <v-card-title>字体设置</v-card-title>
-          <v-card-text>
-            <v-row align="center">
-              <v-col>
-                <v-text-field
-                  v-model="fontSize"
-                  type="number"
-                  label="字体大小"
-                  suffix="px"
-                  :rules="[
-                    v => v >= 16 || '字体大小不能小于16px',
-                    v => v <= 100 || '字体大小不能大于100px'
-                  ]"
-                />
-              </v-col>
-              <v-col cols="auto">
-                <v-btn color="primary" @click="saveFontSize">保存</v-btn>
-              </v-col>
-              <v-col cols="auto">
-                <v-btn color="error" @click="resetFontSize">重置</v-btn>
-              </v-col>
-            </v-row>
-          </v-card-text>
-        </v-card>
-      </v-col>
-
-      <v-col cols="12">
-        <v-card>
-          <v-card-title>编辑设置</v-card-title>
-          <v-card-text>
-            <v-row>
-              <v-col>
-                <v-switch
-                  v-model="autoSave"
-                  label="启用自动保存"
-                  hint="编辑完成后自动上传到服务器"
-                  persistent-hint
-                  @change="saveEditSettings"
-                />
-              </v-col>
-            </v-row>
-            <v-row>
-              <v-col>
-                <v-switch
-                  v-model="refreshBeforeEdit"
-                  label="编辑前自动刷新"
-                  hint="打开编辑框前自动从服务器获取最新数据"
-                  persistent-hint
-                  @change="saveEditSettings"
-                />
-              </v-col>
-            </v-row>
-          </v-card-text>
-        </v-card>
-      </v-col>
-
-      <v-col cols="12">
-        <v-card>
           <v-card-text>
             <v-row justify="center" align="center">
               <v-col cols="12" md="8" class="text-center">
@@ -216,9 +440,13 @@
                 </v-avatar>
                 <h2 class="text-h5 mb-2">HomeworkPage</h2>
                 <p class="text-body-1 mb-4">
-                  由 <a href="https://github.com/sunwuyuan" target="_blank" class="text-decoration-none">Sunwuyuan</a> 开发
+                  由 <a
+                    href="https://github.com/sunwuyuan"
+                    target="_blank"
+                    class="text-decoration-none font-weight-medium"
+                  >Sunwuyuan</a> 开发
                 </p>
-                <div class="d-flex justify-center gap-2">
+                <div class="d-flex justify-center gap-2 flex-wrap">
                   <v-btn
                     color="primary"
                     variant="outlined"
@@ -226,7 +454,7 @@
                     target="_blank"
                     prepend-icon="mdi-github"
                   >
-                  前端 GitHub
+                    前端 GitHub
                   </v-btn>
                   <v-btn
                     color="primary"
@@ -235,18 +463,20 @@
                     target="_blank"
                     prepend-icon="mdi-github"
                   >
-                  后端 GitHub
+                    后端 GitHub
                   </v-btn>
                   <v-btn
                     color="primary"
                     variant="outlined"
-                    href="https://github.com/SunWuyuan/homeworkpage-backend"
+                    href="https://github.com/SunWuyuan/homeworkpage-backend/issues"
+                    target="_blank"
+                    prepend-icon="mdi-bug"
                   >
                     报告问题
                   </v-btn>
                 </div>
-                <p class="mt-4 text-caption">
-                  GPL License
+                <p class="mt-4 text-caption text-medium-emphasis">
+                  GPL License © 2024
                 </p>
               </v-col>
             </v-row>
@@ -259,12 +489,68 @@
   <v-snackbar v-model="snackbar">
     {{ snackbarText }}
   </v-snackbar>
+
+  <v-dialog v-model="deleteDialog" max-width="300">
+    <v-card>
+      <v-card-title>确认删除</v-card-title>
+      <v-card-text>
+        确定要删除学生 "{{ studentToDelete?.name }}" 吗？
+      </v-card-text>
+      <v-card-actions>
+        <v-spacer />
+        <v-btn color="primary" variant="text" @click="deleteDialog = false">
+          取消
+        </v-btn>
+        <v-btn
+          color="error"
+          variant="text"
+          @click="removeStudent(studentToDelete?.index)"
+        >
+          删除
+        </v-btn>
+      </v-card-actions>
+    </v-card>
+  </v-dialog>
+
+  <v-dialog v-model="numberDialog" max-width="300">
+    <v-card>
+      <v-card-title>设置序号</v-card-title>
+      <v-card-text>
+        <v-text-field
+          v-model="newPosition"
+          type="number"
+          label="新序号"
+          :rules="[
+            v => !!v || '序号不能为空',
+            v => v > 0 || '序号必须大于0',
+            v => v <= studentsList.length || `序号不能大于${studentsList.length}`
+          ]"
+          @keyup.enter="applyNewPosition"
+        />
+      </v-card-text>
+      <v-card-actions>
+        <v-spacer />
+        <v-btn color="primary" variant="text" @click="numberDialog = false">
+          取消
+        </v-btn>
+        <v-btn color="primary" @click="applyNewPosition">
+          确定
+        </v-btn>
+      </v-card-actions>
+    </v-card>
+  </v-dialog>
 </template>
 
 <script>
 import axios from 'axios';
+import { useDisplay } from 'vuetify';
 
 export default {
+  setup() {
+    const { mobile } = useDisplay();
+    return { isMobile: mobile };
+  },
+
   data() {
     return {
       serverDomain: '',
@@ -280,6 +566,15 @@ export default {
       refreshBeforeEdit: false,
       showAdvancedEdit: false,
       newStudent: '',
+      editingIndex: -1,
+      editingName: '',
+      deleteDialog: false,
+      studentToDelete: null,
+      numberDialog: false,
+      newPosition: '',
+      studentToMove: null,
+      touchStartTime: 0,
+      touchTimeout: null,
     };
   },
   
@@ -426,7 +721,13 @@ export default {
     },
 
     removeStudent(index) {
-      this.studentsList.splice(index, 1);
+      if (index !== undefined) {
+        this.studentsList.splice(index, 1);
+        this.deleteDialog = false;
+        this.studentToDelete = null;
+        this.synced = false;
+        if (this.autoSave) this.saveStudents();
+      }
     },
 
     reloadStudentList() {
@@ -443,20 +744,159 @@ export default {
       this.snackbarText = text;
       this.snackbar = true;
     },
+
+    startEdit(index, name) {
+      if (this.editingIndex !== -1 && this.editingIndex !== index) {
+        this.saveEdit();
+      }
+      
+      this.editingIndex = index;
+      this.editingName = name;
+    },
+
+    saveEdit() {
+      if (this.editingIndex !== -1) {
+        const newName = this.editingName.trim();
+        if (newName && newName !== this.studentsList[this.editingIndex]) {
+          this.studentsList[this.editingIndex] = newName;
+          if (this.autoSave) {
+            this.saveStudents();
+          }
+        }
+        this.editingIndex = -1;
+        this.editingName = '';
+      }
+    },
+
+    confirmDelete(index) {
+      this.studentToDelete = {
+        index,
+        name: this.studentsList[index]
+      };
+      this.deleteDialog = true;
+    },
+
+    moveStudent(index, direction) {
+      const newIndex = direction === 'up' ? index - 1 : index + 1;
+      if (newIndex >= 0 && newIndex < this.studentsList.length) {
+        [this.studentsList[index], this.studentsList[newIndex]] = 
+        [this.studentsList[newIndex], this.studentsList[index]];
+        
+        if (this.autoSave) {
+          this.saveStudents();
+        }
+      }
+    },
+
+    setStudentNumber(index) {
+      this.studentToMove = index;
+      this.newPosition = String(index + 1);
+      this.numberDialog = true;
+    },
+
+    applyNewPosition() {
+      const newPos = parseInt(this.newPosition) - 1;
+      if (
+        this.studentToMove !== null &&
+        newPos >= 0 &&
+        newPos < this.studentsList.length &&
+        newPos !== this.studentToMove
+      ) {
+        const student = this.studentsList[this.studentToMove];
+        this.studentsList.splice(this.studentToMove, 1);
+        this.studentsList.splice(newPos, 0, student);
+        this.synced = false;
+        if (this.autoSave) this.saveStudents();
+      }
+      this.numberDialog = false;
+      this.studentToMove = null;
+      this.newPosition = '';
+    },
+
+    moveToTop(index) {
+      if (index > 0) {
+        const student = this.studentsList[index];
+        this.studentsList.splice(index, 1);
+        this.studentsList.unshift(student);
+        
+        if (this.autoSave) {
+          this.saveStudents();
+        }
+      }
+    },
   },
 };
 </script>
 
 <style scoped>
 .student-card {
-  transition: all 0.3s ease;
+  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
 }
 
-.student-card:hover {
-  background-color: rgba(var(--v-theme-primary), 0.05);
+.bg-primary-subtle {
+  background-color: rgb(var(--v-theme-primary), 0.05);
+}
+
+.action-buttons {
+  transition: opacity 0.2s ease;
+  opacity: 0;
+}
+
+.gap-1 {
+  gap: 4px;
 }
 
 .gap-2 {
   gap: 8px;
 }
+
+.student-card .v-text-field {
+  margin: 0;
+  padding: 0;
+}
+
+@media (max-width: 600px) {
+  .v-container {
+    padding: 12px;
+  }
+  
+  .v-col {
+    padding: 8px;
+  }
+}
+
+.student-card.mobile {
+  margin-bottom: 8px;
+}
+
+.student-card.mobile .v-btn {
+  min-width: 40px;
+  min-height: 40px;
+}
+
+.student-card.mobile .v-text-field {
+  font-size: 16px;
+}
+
+@media (max-width: 600px) {
+  .v-col {
+    padding: 6px !important;
+  }
+  
+  .student-card {
+    margin-bottom: 4px;
+  }
+  
+  .action-buttons {
+    opacity: 1;
+  }
+}
+
+.student-card {
+  -webkit-tap-highlight-color: transparent;
+}
+
+.student-card:active {
+  background-color: rgb(var(--v-theme-primary), 0.05);
+}
 </style> 
\ No newline at end of file