fix: 优化文本预览功能体验；

3rdparty/QHexView/document/qhexcursor.cpp

@@ -61,7 +61,7 @@ qsizetype QHexCursor::selectionLength(qsizetype index) const {
 
 qsizetype QHexCursor::currentSelectionLength() const {
     if (hasPreviewSelection() && m_preMode != SelectionRemove) {
-        return qAbs(m_position - m_selection + 1);
+        return qAbs(m_position - m_selection) + 1;
     }
 
     qsizetype len = 0;

3rdparty/WingCodeEdit

@@ -1 +1 @@
-Subproject commit fe0774c1d2ff5c86832d5850c1dccbbf3a6c3c66
+Subproject commit 4307a2552e52d9f7e5c8fc2bd1d3148748e968f9

lang/zh_CN/winghex_zh_CN.ts

@@ -1334,7 +1334,7 @@
     <message>
         <location filename="../../src/dialog/mainwindow.cpp" line="1066"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="1135"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3788"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3800"/>
         <source>NothingToSave</source>
         <translation>没有保存的数据</translation>
     </message>
@@ -1498,7 +1498,7 @@
     <message>
         <location filename="../../src/dialog/mainwindow.cpp" line="1641"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="1654"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3020"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3032"/>
         <source>LayoutRestoring...</source>
         <translation>恢复布局中...</translation>
     </message>
@@ -1509,7 +1509,7 @@
     </message>
     <message>
         <location filename="../../src/dialog/mainwindow.cpp" line="1667"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3004"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3016"/>
         <source>SaveLayout</source>
         <translation>保存布局</translation>
     </message>
@@ -1620,13 +1620,13 @@
         <location filename="../../src/dialog/mainwindow.cpp" line="2137"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2167"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2194"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3174"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3237"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3255"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3263"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3509"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3826"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3835"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3186"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3249"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3267"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3275"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3521"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3838"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3847"/>
         <source>Error</source>
         <translation>错误</translation>
     </message>
@@ -1643,8 +1643,8 @@
         <location filename="../../src/dialog/mainwindow.cpp" line="1952"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="1986"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2046"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3826"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3835"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3838"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3847"/>
         <source>FilePermission</source>
         <translation>因文件权限无法继续！</translation>
     </message>
@@ -1670,7 +1670,7 @@
         <location filename="../../src/dialog/mainwindow.cpp" line="2114"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2181"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2761"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3794"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3806"/>
         <source>ChooseSaveFile</source>
         <translation>请选择保存文件路径：</translation>
     </message>
@@ -1690,42 +1690,42 @@
         <translation>搜索数量已到达上限，结果可能不全，建议请按区段搜索。</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3027"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3039"/>
         <source>SaveLayoutSuccess</source>
         <translation>保存布局成功</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3030"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3042"/>
         <source>SaveLayoutError</source>
         <translation>保存布局失败</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3215"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3227"/>
         <source>HasClonedView</source>
         <translation>该编辑页已被克隆编辑，如果关闭，相关联的页也会被关闭，你确认继续吗？</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3781"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3793"/>
         <source>SaveWorkSpace</source>
         <translation>保存工作区</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3782"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3794"/>
         <source>WingHexWorkSpace (*.wingpro)</source>
         <translation>羽云十六进制工作区 (*.wingpro)</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3897"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3909"/>
         <source>ConfirmSave</source>
         <translation>正在关闭未保存的文件或工作区，你确定保存吗？</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3916"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3928"/>
         <source>Column %1</source>
         <translation>列 %1</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3977"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3989"/>
         <source>ConfirmAPPSave</source>
         <translation>你尝试关闭程序，但仍存在未保存的文件或工作区，你确定保存这些更改吗？</translation>
     </message>
@@ -1735,7 +1735,7 @@
         <location filename="../../src/dialog/mainwindow.cpp" line="1244"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2061"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2125"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3866"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3878"/>
         <source>SaveSuccessfully</source>
         <translation>保存成功！</translation>
     </message>
@@ -1746,7 +1746,8 @@
         <translation>保存工作区错误！</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3215"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="2992"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3227"/>
         <source>Warn</source>
         <translation>警告</translation>
     </message>
@@ -1919,7 +1920,7 @@
     <message>
         <location filename="../../src/dialog/mainwindow.cpp" line="2603"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2644"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3368"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3380"/>
         <source>NoSelection</source>
         <translation>没有选区，无法继续的操作！</translation>
     </message>
@@ -1970,88 +1971,93 @@
         <translation>导出结果失败！</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="2969"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="2971"/>
         <source>TooManyBytesDecode</source>
         <translation>超出解码字节限制……</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="2998"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="2992"/>
+        <source>NoTextFileMayInvalid</source>
+        <translation>该文件不是文本文件，以文本方式预览并不是一个好的方式，你确认继续吗？</translation>
+    </message>
+    <message>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3010"/>
         <source>LayoutSaving...</source>
         <translation>布局保存中...</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3004"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3016"/>
         <source>PleaseInput</source>
         <translation>请输入</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3036"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3048"/>
         <source>LogExporting...</source>
         <translation>日志导出中...</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3041"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3053"/>
         <source>ExportLogError</source>
         <translation>导出日志失败！</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3044"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3056"/>
         <source>ExportLogSuccess</source>
         <translation>导出日志成功，路径：</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3052"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3064"/>
         <source>ClearLogSuccess</source>
         <translation>清空日志成功！</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3113"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3125"/>
         <source>BadNetwork</source>
         <translation>无法与远程服务器的更新检查建立连接，请检查网络。</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3118"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3130"/>
         <source>NewestVersion</source>
         <translation>当前软件为最新版本</translation>
     </message>
     <message>
         <location filename="../../src/dialog/mainwindow.cpp" line="386"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3115"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3127"/>
         <source>OlderVersion</source>
         <translation>你使用的软件为老版本，建议到 Github 和 Gitee 的仓库发行版下载更新。</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3100"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3112"/>
         <source>CheckingUpdate</source>
         <translation>检查更新中……</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3175"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3187"/>
         <source>Too much opened files</source>
         <translation>打开的文件过多，无法继续操作！</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3237"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3249"/>
         <source>FilePermissionSure2Quit</source>
         <translation>因文件权限无法保存，你确认要退出吗？</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3255"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3267"/>
         <source>UnknownErrorSure2Quit</source>
         <translation>因未知错误无法保存，你确认要退出吗？</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3263"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3275"/>
         <source>WorkSpaceUnSavedSure2Quit</source>
         <translation>工作区文件无法保存，你确认要退出吗？</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3426"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3438"/>
         <source>CopyLimit</source>
         <translation>拷贝字节超出限制</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3510"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3522"/>
         <source>ErrOpenFileBelow</source>
         <translation>打开文件出现错误（由于权限不足），如下为打开错误的文件：</translation>
     </message>
@@ -2483,7 +2489,7 @@
 <context>
     <name>QApplication</name>
     <message>
-        <location filename="../../src/utilities.h" line="258"/>
+        <location filename="../../src/utilities.h" line="262"/>
         <source>OptionNeedRestart</source>
         <translation>该设置需要程序重启后生效</translation>
     </message>
@@ -5090,63 +5096,69 @@
 <context>
     <name>ShowTextDialog</name>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="147"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="186"/>
         <source>General</source>
         <translation>基本</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="149"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="188"/>
         <source>Copy</source>
         <translation>复制</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="92"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="100"/>
         <source>TextBroswer</source>
         <translation>文本浏览</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="107"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="91"/>
+        <source>Cancel</source>
+        <translation>取消</translation>
+    </message>
+    <message>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="115"/>
         <source>Plain Text</source>
         <translation>纯文本</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="116"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="124"/>
         <source>TooHugeFile</source>
         <translation>文件内容过大</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="121"/>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="188"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="131"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="158"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="227"/>
         <source>Loading...</source>
         <translation>加载中...</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="141"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="180"/>
         <source>Edit</source>
         <translation>编辑</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="153"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="192"/>
         <source>Find</source>
         <translation>查找</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="157"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="196"/>
         <source>Goto</source>
         <translation>跳转</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="162"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="201"/>
         <source>Encoding</source>
         <translation>编码</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="165"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="204"/>
         <source>UpdateDefs</source>
         <translation>更新高亮定义</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="175"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="214"/>
         <source>CopyToClipBoard</source>
         <translation>数据已拷贝到粘贴板</translation>
     </message>

lang/zh_TW/winghex_zh_TW.ts

@@ -1334,7 +1334,7 @@
     <message>
         <location filename="../../src/dialog/mainwindow.cpp" line="1066"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="1135"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3788"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3800"/>
         <source>NothingToSave</source>
         <translation>沒有保存的數據</translation>
     </message>
@@ -1498,7 +1498,7 @@
     <message>
         <location filename="../../src/dialog/mainwindow.cpp" line="1641"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="1654"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3020"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3032"/>
         <source>LayoutRestoring...</source>
         <translation>恢復佈局中...</translation>
     </message>
@@ -1509,7 +1509,7 @@
     </message>
     <message>
         <location filename="../../src/dialog/mainwindow.cpp" line="1667"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3004"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3016"/>
         <source>SaveLayout</source>
         <translation>保存佈局</translation>
     </message>
@@ -1620,13 +1620,13 @@
         <location filename="../../src/dialog/mainwindow.cpp" line="2137"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2167"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2194"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3174"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3237"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3255"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3263"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3509"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3826"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3835"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3186"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3249"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3267"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3275"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3521"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3838"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3847"/>
         <source>Error</source>
         <translation>錯誤</translation>
     </message>
@@ -1643,8 +1643,8 @@
         <location filename="../../src/dialog/mainwindow.cpp" line="1952"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="1986"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2046"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3826"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3835"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3838"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3847"/>
         <source>FilePermission</source>
         <translation>因檔許可權無法繼續！</translation>
     </message>
@@ -1670,7 +1670,7 @@
         <location filename="../../src/dialog/mainwindow.cpp" line="2114"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2181"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2761"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3794"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3806"/>
         <source>ChooseSaveFile</source>
         <translation>請選擇保存檔路徑：</translation>
     </message>
@@ -1690,42 +1690,42 @@
         <translation>搜索數量已到達上限，結果可能不全，建議請按區段搜索。</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3027"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3039"/>
         <source>SaveLayoutSuccess</source>
         <translation>保存佈局成功</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3030"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3042"/>
         <source>SaveLayoutError</source>
         <translation>保存佈局失敗</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3215"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3227"/>
         <source>HasClonedView</source>
         <translation>該編輯頁已被克隆編輯，如果關閉，相關聯的頁也會被關閉，你確認繼續嗎？</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3781"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3793"/>
         <source>SaveWorkSpace</source>
         <translation>保存工作區</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3782"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3794"/>
         <source>WingHexWorkSpace (*.wingpro)</source>
         <translation>羽雲十六進制工作區 (*.wingpro)</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3897"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3909"/>
         <source>ConfirmSave</source>
         <translation>正在關閉未保存的檔或工作區，你確定保存嗎？</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3916"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3928"/>
         <source>Column %1</source>
         <translation>列 %1</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3977"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3989"/>
         <source>ConfirmAPPSave</source>
         <translation>你嘗試關閉程式，但仍存在未保存的檔或工作區，你確定保存這些更改嗎？</translation>
     </message>
@@ -1735,7 +1735,7 @@
         <location filename="../../src/dialog/mainwindow.cpp" line="1244"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2061"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2125"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3866"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3878"/>
         <source>SaveSuccessfully</source>
         <translation>保存成功！</translation>
     </message>
@@ -1746,7 +1746,8 @@
         <translation>保存工作區錯誤！</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3215"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="2992"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3227"/>
         <source>Warn</source>
         <translation>警告</translation>
     </message>
@@ -1919,7 +1920,7 @@
     <message>
         <location filename="../../src/dialog/mainwindow.cpp" line="2603"/>
         <location filename="../../src/dialog/mainwindow.cpp" line="2644"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3368"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3380"/>
         <source>NoSelection</source>
         <translation>沒有選區，無法繼續的操作！</translation>
     </message>
@@ -1970,88 +1971,93 @@
         <translation>導出結果失敗！</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="2969"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="2971"/>
         <source>TooManyBytesDecode</source>
         <translation>超出解碼位元組限制……</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="2998"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="2992"/>
+        <source>NoTextFileMayInvalid</source>
+        <translation>該檔不是文本檔，以文本方式預覽並不是一個好的方式，你確認繼續嗎？</translation>
+    </message>
+    <message>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3010"/>
         <source>LayoutSaving...</source>
         <translation>佈局保存中...</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3004"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3016"/>
         <source>PleaseInput</source>
         <translation>請輸入</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3036"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3048"/>
         <source>LogExporting...</source>
         <translation>日誌導出中...</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3041"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3053"/>
         <source>ExportLogError</source>
         <translation>導出日誌失敗！</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3044"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3056"/>
         <source>ExportLogSuccess</source>
         <translation>導出日誌成功，路徑：</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3052"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3064"/>
         <source>ClearLogSuccess</source>
         <translation>清空日誌成功！</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3113"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3125"/>
         <source>BadNetwork</source>
         <translation>無法與遠程伺服器的更新檢查建立連接，請檢查網路。</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3118"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3130"/>
         <source>NewestVersion</source>
         <translation>當前軟體為最新版本</translation>
     </message>
     <message>
         <location filename="../../src/dialog/mainwindow.cpp" line="386"/>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3115"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3127"/>
         <source>OlderVersion</source>
         <translation>你使用的軟體為老版本，建議到 Github 和 Gitee 的倉庫發行版下載更新。</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3100"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3112"/>
         <source>CheckingUpdate</source>
         <translation>檢查更新中……</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3175"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3187"/>
         <source>Too much opened files</source>
         <translation>打開的檔過多，無法繼續操作！</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3237"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3249"/>
         <source>FilePermissionSure2Quit</source>
         <translation>因檔許可權無法保存，你確認要退出嗎？</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3255"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3267"/>
         <source>UnknownErrorSure2Quit</source>
         <translation>因未知錯誤無法保存，你確認要退出嗎？</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3263"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3275"/>
         <source>WorkSpaceUnSavedSure2Quit</source>
         <translation>工作區檔無法保存，你確認要退出嗎？</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3426"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3438"/>
         <source>CopyLimit</source>
         <translation>拷貝位元組超出限制</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/mainwindow.cpp" line="3510"/>
+        <location filename="../../src/dialog/mainwindow.cpp" line="3522"/>
         <source>ErrOpenFileBelow</source>
         <translation>打開檔出現錯誤（由於許可權不足），如下為打開錯誤的檔：</translation>
     </message>
@@ -2483,7 +2489,7 @@
 <context>
     <name>QApplication</name>
     <message>
-        <location filename="../../src/utilities.h" line="258"/>
+        <location filename="../../src/utilities.h" line="262"/>
         <source>OptionNeedRestart</source>
         <translation>該設置需要程式重啟後生效</translation>
     </message>
@@ -5090,63 +5096,69 @@
 <context>
     <name>ShowTextDialog</name>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="147"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="186"/>
         <source>General</source>
         <translation>基本</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="149"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="188"/>
         <source>Copy</source>
         <translation>複製</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="92"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="100"/>
         <source>TextBroswer</source>
         <translation>文本流覽</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="107"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="91"/>
+        <source>Cancel</source>
+        <translation>取消</translation>
+    </message>
+    <message>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="115"/>
         <source>Plain Text</source>
         <translation>純文字</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="116"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="124"/>
         <source>TooHugeFile</source>
         <translation>檔內容過大</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="121"/>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="188"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="131"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="158"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="227"/>
         <source>Loading...</source>
         <translation>加載中...</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="141"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="180"/>
         <source>Edit</source>
         <translation>編輯</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="153"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="192"/>
         <source>Find</source>
         <translation>查找</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="157"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="196"/>
         <source>Goto</source>
         <translation>跳轉</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="162"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="201"/>
         <source>Encoding</source>
         <translation>編碼</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="165"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="204"/>
         <source>UpdateDefs</source>
         <translation>更新高亮定義</translation>
     </message>
     <message>
-        <location filename="../../src/dialog/showtextdialog.cpp" line="175"/>
+        <location filename="../../src/dialog/showtextdialog.cpp" line="214"/>
         <source>CopyToClipBoard</source>
         <translation>數據已拷貝到粘貼板</translation>
     </message>

src/dialog/mainwindow.cpp

@@ -2931,6 +2931,8 @@ void MainWindow::on_selectionChanged() {
         return;
     }
 
+    on_locChanged();
+
     auto cursor = hexeditor->cursor();
     QByteArrayList buffer;
     bool isPreview = false;
@@ -2981,9 +2983,19 @@ void MainWindow::on_viewtxt() {
         return;
     }
     auto hexeditor = editor->hexEditor();
+    auto filename = editor->fileName();
     QMimeDatabase db;
-    _showtxt->load(hexeditor->document()->buffer(),
-                   db.mimeTypeForFile(editor->fileName()).name());
+    auto mime = db.mimeTypeForFile(filename);
+    auto ret = Utilities::isTextFile(mime);
+    if (!ret) {
+        auto ret = WingMessageBox::warning(
+            this, tr("Warn"), tr("NoTextFileMayInvalid"),
+            QMessageBox::Yes | QMessageBox::No, QMessageBox::No);
+        if (ret == QMessageBox::No) {
+            return;
+        }
+    }
+    _showtxt->load(hexeditor->document()->buffer(), mime.name());
 }
 
 void MainWindow::on_fullScreen() {

src/dialog/showtextdialog.cpp

@@ -26,6 +26,7 @@
 #include "dialog/definitiondownload.h"
 #include "dialog/encodingdialog.h"
 
+#include <QScrollBar>
 #include <QThread>
 #include <QVBoxLayout>
 
@@ -86,6 +87,13 @@ ShowTextDialog::ShowTextDialog(QWidget *parent) : FramelessMainWindow(parent) {
     m_syntaxButton->setPopupMode(QToolButton::InstantPopup);
     m_syntaxButton->addAction(new SyntaxPopupAction(this));
 
+    m_cancelButton = new QPushButton(this);
+    m_cancelButton->setText(tr("Cancel"));
+    connect(m_cancelButton, &QPushButton::clicked, this,
+            [this]() { m_continue = false; });
+    m_status->addPermanentWidget(m_cancelButton);
+    m_cancelButton->hide();
+
     m_status->addPermanentWidget(m_syntaxButton);
 
     // ok, preparing for starting...
@@ -117,6 +125,8 @@ void ShowTextDialog::load(QHexBuffer *buffer, const QString &mime,
         return;
     }
 
+    m_syntaxButton->hide();
+    setSyntax(WingCodeEdit::nullSyntax());
     show();
     m_status->showMessage(tr("Loading..."));
 
@@ -129,7 +139,36 @@ void ShowTextDialog::load(QHexBuffer *buffer, const QString &mime,
     }
 
     this->buffer = buffer->read(qsizetype(0), buffer->length());
-    m_edit->setPlainText(Utilities::decodingString(this->buffer, enc));
+    m_cancelButton->setVisible(true);
+    m_continue = true;
+
+    auto e = Utilities::realEncodingName(enc);
+    auto en = QStringConverter::encodingForName(e.toUtf8());
+    QTextStream ss(this->buffer);
+    ss.setEncoding(en.value_or(QStringConverter::Utf8)); // fallback to UTF-8
+    ss.setAutoDetectUnicode(false);
+    auto total = this->buffer.size();
+    m_edit->clear();
+    m_edit->setEnabled(false);
+    while (m_continue && !ss.atEnd()) {
+        auto p = ss.readLine();
+        m_edit->appendPlainText(p);
+        m_edit->verticalScrollBar()->setValue(0);
+        m_status->showMessage(
+            tr("Loading...") + QStringLiteral(" (") +
+            QString::number(100.0 * ss.pos() / total, 'g', 3) +
+            QStringLiteral("%)"));
+        qApp->processEvents();
+    }
+
+    m_cancelButton->hide();
+    m_syntaxButton->setVisible(true);
+    m_edit->setEnabled(true);
+    m_continue = false;
+
+    auto cursor = m_edit->textCursor();
+    cursor.setPosition(0);
+    m_edit->setTextCursor(cursor);
     m_status->showMessage(enc);
 
     setSyntax(WingCodeEdit::syntaxRepo().definitionForMimeType(mime));
@@ -199,3 +238,9 @@ void ShowTextDialog::on_updateDefs() {
     downloadDialog->raise();
     downloadDialog->activateWindow();
 }
+
+void ShowTextDialog::closeEvent(QCloseEvent *event) {
+    m_continue = false;
+    m_edit->clear();
+    FramelessMainWindow::closeEvent(event);
+}

src/dialog/showtextdialog.h

@@ -29,6 +29,7 @@
 #include "dialog/framelessmainwindow.h"
 #include "utilities.h"
 
+#include <QPushButton>
 #include <QShortcut>
 #include <QStatusBar>
 #include <QToolButton>
@@ -120,12 +121,19 @@ private slots:
     void on_encoding();
     void on_updateDefs();
 
+    // QWidget interface
+protected:
+    virtual void closeEvent(QCloseEvent *event) override;
+
 private:
     Ribbon *m_ribbon = nullptr;
     CodeEdit *m_edit = nullptr;
     QStatusBar *m_status = nullptr;
     QToolButton *m_syntaxButton = nullptr;
 
+    QPushButton *m_cancelButton = nullptr;
+    bool m_continue = true;
+
     QByteArray buffer;
 };
 

src/utilities.h

@@ -224,10 +224,14 @@ public:
                      (screen.height() - window->height()) / 2);
     }
 
+    static bool isTextFile(const QMimeType &type) {
+        return type.inherits(QStringLiteral("text/plain"));
+    }
+
     static bool isTextFile(const QFileInfo &info) {
         QMimeDatabase db;
         auto t = db.mimeTypeForFile(info);
-        return t.inherits(QStringLiteral("text/plain"));
+        return isTextFile(t);
     }
 
     static QString getAppDataPath() {
@@ -280,13 +284,17 @@ public:
 #endif
     }
 
+    static QString realEncodingName(const QString &enc = {}) {
+        if (enc.isEmpty() ||
+            enc.compare(QStringLiteral("ASCII"), Qt::CaseInsensitive) == 0) {
+            return QStringLiteral("ISO-8859-1");
+        }
+        return enc;
+    }
+
     static QString decodingString(const QByteArray &buffer,
                                   const QString &enc = {}) {
-        auto encoding = enc;
-        if (encoding.isEmpty() || encoding.compare(QStringLiteral("ASCII"),
-                                                   Qt::CaseInsensitive) == 0) {
-            encoding = QStringLiteral("ISO-8859-1");
-        }
+        auto encoding = realEncodingName(enc);
 
 #if QT_VERSION >= QT_VERSION_CHECK(6, 0, 0)
         auto en = QStringConverter::encodingForName(encoding.toUtf8());