linuxdeepin · deepin-bot · Jul 24, 2026 · Jul 23, 2026
diff --git a/src/common/CSyntaxHighlighter.cpp b/src/common/CSyntaxHighlighter.cpp
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2017 - 2022 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2017-2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -23,11 +23,35 @@
     m_bHighlight = isEnable;
 }
 
+void CSyntaxHighlighter::setInvalidCharHighlight(bool enable)
+{
+    qDebug() << "CSyntaxHighlighter::setInvalidCharHighlight()" << enable;
+    m_bInvalidCharHighlight = enable;
+    if (enable) {
+        setEnableHighlight(true);
+    }
+    rehighlight();
+}
+
 void CSyntaxHighlighter::highlightBlock(const QString &text)
 {
     if (!m_bHighlight) {
         return;
     }
 
     KSyntaxHighlighting::SyntaxHighlighter::highlightBlock(text);
+
+    // 叠加 \00 无效字符高亮：红色背景 + 白色文字
+    if (m_bInvalidCharHighlight) {
+        QTextCharFormat fmt;
+        fmt.setBackground(QColor("#FF0000"));
+        fmt.setForeground(QColor("#FFFFFF"));
+        // 匹配字面量 \00（反斜杠 + 两个零）
+        static const QRegularExpression re("\\\\00");
+        QRegularExpressionMatchIterator it = re.globalMatch(text);
+        while (it.hasNext()) {
+            QRegularExpressionMatch match = it.next();
+            setFormat(match.capturedStart(), match.capturedLength(), fmt);
+        }
+    }
 }
diff --git a/src/common/CSyntaxHighlighter.h b/src/common/CSyntaxHighlighter.h
@@ -1,11 +1,14 @@
-// SPDX-FileCopyrightText: 2017 - 2022 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2017-2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
 #pragma once
 #include <KSyntaxHighlighting/Repository>
 #include <KSyntaxHighlighting/Definition>
 #include <KSyntaxHighlighting/SyntaxHighlighter>
+#include <QRegularExpression>
+#include <QTextCharFormat>
+#include <QColor>
 
 using namespace KSyntaxHighlighting;
 class CSyntaxHighlighter : public SyntaxHighlighter
@@ -15,10 +18,12 @@
     explicit CSyntaxHighlighter(QObject *parent = nullptr);
     explicit CSyntaxHighlighter(QTextDocument *pDocument);
     void setEnableHighlight(bool isEnable);
+    void setInvalidCharHighlight(bool enable);
 
 protected:
     virtual void highlightBlock(const QString & text) override;
 
 private:
     bool m_bHighlight = false;
+    bool m_bInvalidCharHighlight = false;
 };
diff --git a/src/common/fileloadthread.cpp b/src/common/fileloadthread.cpp
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2017 - 2022 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2017-2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -36,11 +36,20 @@ void FileLoadThread::run()
 
             // 发送文件头信息，用于预先加载数据
             QString textEncode = QString::fromLocal8Bit(encode);
-            if (textEncode.contains("ASCII", Qt::CaseInsensitive) || textEncode.contains("UTF-8", Qt::CaseInsensitive)) {
-                emit sigPreProcess(encode, indata);
+           if (textEncode.contains("ASCII", Qt::CaseInsensitive) || textEncode.contains("UTF-8", Qt::CaseInsensitive)) {
+                if (indata.contains('\x00')) {
+                    QByteArray headData = indata;
+                    headData.replace('\x00', "\\00");
+                    emit sigPreProcess(encode, headData);
+                } else {
+                    emit sigPreProcess(encode, indata);
+                }
             } else {
                 QByteArray outHeadData;
                 DetectCode::ChangeFileEncodingFormat(indata, outHeadData, textEncode, QString("UTF-8"));
+                if (outHeadData.contains('\x00')) {
+                    outHeadData.replace('\x00', "\\00");
+                }
                 emit sigPreProcess(encode, outHeadData);
             }
         }
@@ -54,10 +63,16 @@ void FileLoadThread::run()
             qWarning() << Q_FUNC_INFO << "Read file data error, " << QString(e.what());
 
             file.close();
-            emit sigLoadFinished(encode, indata, true);
+            emit sigLoadFinished(encode, indata, true, false);
             return;
         }
 
+        // NUL 字节检测与转义：将每个 \x00 替换为三个 ASCII 字符 \00
+        bool hasNul = indata.contains('\x00');
+        if (hasNul) {
+            indata.replace('\x00', "\\00");
+        }
+
         if (encode.isEmpty()) {
             //编码识别，如果文件数据大于1M，则只裁剪出1M文件数据去做编码探测
             QByteArray dateUsedForCodeIdentify;
@@ -71,11 +86,11 @@ void FileLoadThread::run()
 
         QString textEncode = QString::fromLocal8Bit(encode);
         if (textEncode.contains("ASCII", Qt::CaseInsensitive) || textEncode.contains("UTF-8", Qt::CaseInsensitive)) {
-            emit sigLoadFinished(encode, indata, false);
+            emit sigLoadFinished(encode, indata, false, hasNul);
         } else {
             QByteArray outData;
             DetectCode::ChangeFileEncodingFormat(indata, outData, textEncode, QString("UTF-8"));
-            emit sigLoadFinished(encode, outData, false);
+            emit sigLoadFinished(encode, outData, false, hasNul);
         }
     }
 

diff --git a/src/common/fileloadthread.h b/src/common/fileloadthread.h
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2017 - 2022 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2017-2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -19,7 +19,7 @@ class FileLoadThread : public QThread
 signals:
     // 预处理信号，优先处理文件头，防止出现加载时间过长的情况
     void sigPreProcess(const QByteArray &encode, const QByteArray &content);
-    void sigLoadFinished(const QByteArray &encode, const QByteArray &content, bool error = false);
+    void sigLoadFinished(const QByteArray &encode, const QByteArray &content, bool error = false, bool hasNul = false);
 
 private:
     QString m_strFilePath;

diff --git a/src/controls/warningnotices.cpp b/src/controls/warningnotices.cpp
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2019 - 2023 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2019-2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -22,11 +22,15 @@ WarningNotices::WarningNotices(MessageType notifyType, QWidget *parent)
     setIcon(QIcon(":/images/warning.svg"));
     m_reloadBtn = new QPushButton(tr("Reload"), this);
     m_saveAsBtn = new QPushButton(qApp->translate("Window", "Save as"), this);
+    m_editAnywayBtn = new QPushButton(tr("Edit Anyway"), this);
     m_reloadBtn->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
     m_saveAsBtn->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    m_editAnywayBtn->setSizePolicy(QSizePolicy::Fixed, QSizePolicy::Fixed);
+    m_editAnywayBtn->setVisible(false);
 
     connect(m_reloadBtn, &QPushButton::clicked, this, &WarningNotices::slotreloadBtnClicked);
     connect(m_saveAsBtn, &QPushButton::clicked, this, &WarningNotices::slotsaveAsBtnClicked);
+    connect(m_editAnywayBtn, &QPushButton::clicked, this, &WarningNotices::slotEditAnywayBtnClicked);
 
 #ifdef DTKWIDGET_CLASS_DSizeMode
     DDialogCloseButton *closeBtn = findChild<DDialogCloseButton *>();
@@ -83,3 +87,17 @@ void WarningNotices::slotsaveAsBtnClicked()
     this->hide();
     emit saveAsBtnClicked();
 }
+
+void WarningNotices::setEditAnywayBtn()
+{
+    m_reloadBtn->setVisible(false);
+    m_saveAsBtn->setVisible(false);
+    m_editAnywayBtn->setVisible(true);
+    setWidget(m_editAnywayBtn);
+}
+
+void WarningNotices::slotEditAnywayBtnClicked()
+{
+    this->hide();
+    emit editAnywayBtnClicked();
+}
diff --git a/src/controls/warningnotices.h b/src/controls/warningnotices.h
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2019 - 2022 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2019-2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -23,19 +23,23 @@
     void setReloadBtn();
     void setSaveAsBtn();
     void clearBtn();
+    void setEditAnywayBtn();
 
 signals:
     void reloadBtnClicked();
     void saveAsBtnClicked();
     void closeBtnClicked();
+    void editAnywayBtnClicked();
 
 public slots:
     void slotreloadBtnClicked();
     void slotsaveAsBtnClicked();
+    void slotEditAnywayBtnClicked();
 
 private:
     QPushButton *m_reloadBtn;
     QPushButton *m_saveAsBtn;
+    QPushButton *m_editAnywayBtn;
     QHBoxLayout *m_pLayout;
 };
 

diff --git a/src/editor/editwrapper.cpp b/src/editor/editwrapper.cpp
@@ -114,6 +114,7 @@ EditWrapper::EditWrapper(Window *window, QWidget *parent)
     connect(m_pTextEdit, &TextEdit::cursorModeChanged, this, &EditWrapper::handleCursorModeChanged);
     connect(m_pWaringNotices, &WarningNotices::reloadBtnClicked, this, &EditWrapper::reloadModifyFile);
     connect(m_pWaringNotices, &WarningNotices::saveAsBtnClicked, m_pWindow, &Window::saveAsFile);
+    connect(m_pWaringNotices, &WarningNotices::editAnywayBtnClicked, this, &EditWrapper::onEditAnyway);
     // NOTE: 文本高亮会触发重新布局，与界面布局(拖拽、放大窗口)变更时的布局操作冲突，因此调整更新顺序，在布局后刷新高亮
     connect(m_pTextEdit->verticalScrollBar(), &QScrollBar::valueChanged, this, [this](int) {
         OnUpdateHighlighter();
@@ -507,6 +508,11 @@ QString EditWrapper::getTextEncode()
  */
 bool EditWrapper::saveFile(QByteArray encode)
 {
+    // 预览模式下不允许直接静默保存，交由 Window 层确认弹窗
+    if (m_bInvalidCharPreview) {
+        return false;
+    }
+
     QString qstrFilePath = m_pTextEdit->getTruePath();
     hideWarningNotices();
 
@@ -541,6 +547,47 @@ bool EditWrapper::saveFile(QByteArray encode)
     return ok;
 }
 
+void EditWrapper::onEditAnyway()
+{
+    m_bInvalidCharEditAllowed = true;
+    m_pTextEdit->setReadOnly(false);
+    m_pWaringNotices->hide();
+    // 保持 m_bInvalidCharPreview = true，直到 Save As 或 Save Anyway 成功
+}
+
+void EditWrapper::exitInvalidCharPreview()
+{
+    m_bInvalidCharPreview = false;
+    m_bInvalidCharEditAllowed = false;
+    m_sInvalidCharOriginalPath.clear();
+    m_pTextEdit->setReadOnly(false);
+    m_pWaringNotices->hide();
+    if (m_pSyntaxHighlighter) {
+        m_pSyntaxHighlighter->setInvalidCharHighlight(false);
+    }
+    updateModifyStatus(false);
+}
+
+bool EditWrapper::forceSaveInvalidCharFile()
+{
+    QString savePath = m_sInvalidCharOriginalPath;
+    TextFileSaver saver(m_pTextEdit->document());
+    if (BottomBar::EndlineFormat::Windows == m_pBottomBar->getEndlineFormat())
+        saver.setWindowsEndlineFormat(true);
+    saver.setFilePath(savePath);
+    saver.setEncoding(m_sCurEncode.toUtf8());
+
+    bool ok = saver.save();
+    if (ok) {
+        m_sFirstEncode = m_sCurEncode;
+        QFileInfo fi(savePath);
+        m_tModifiedDateTime = fi.lastModified();
+        m_bIsTemFile = false;
+        exitInvalidCharPreview();
+    }
+    return ok;
+}
+
 void EditWrapper::getPlainTextContent(QByteArray &plainTextContent)
 {
     QString strPlainText = m_pTextEdit->toPlainText();
@@ -823,7 +870,7 @@ void EditWrapper::handleFilePreProcess(const QByteArray &encode, const QByteArra
  * @param encode    文件编码
  * @param content   完整文件内容
  */
-void EditWrapper::handleFileLoadFinished(const QByteArray &encode, const QByteArray &content, bool error)
+void EditWrapper::handleFileLoadFinished(const QByteArray &encode, const QByteArray &content, bool error, bool hasNul)
 {
     // 判断是否预加载，若已预加载，则无需重新初始化
     if (!m_bHasPreProcess) {
@@ -857,6 +904,31 @@ void EditWrapper::handleFileLoadFinished(const QByteArray &encode, const QByteAr
             m_pTextEdit->setReadOnly(true);
         }
 
+        // 无效字符（NUL）预览模式初始化
+        if (hasNul) {
+            m_bInvalidCharPreview = true;
+            m_bInvalidCharEditAllowed = false;
+            m_sInvalidCharOriginalPath = m_pTextEdit->getTruePath();
+            m_pTextEdit->setReadOnly(true);
+            m_pWaringNotices->setMessage(tr("The file contains invalid characters (NUL). Preview mode is read-only."));
+            m_pWaringNotices->setEditAnywayBtn();
+            m_pWaringNotices->show();
+            DMessageManager::instance()->sendMessage(m_pTextEdit, m_pWaringNotices);
+            // 确保 CSyntaxHighlighter 存在（无语法定义的文件如 .txt 不会在 reinitOnFileLoad 中创建）
+            if (!m_pSyntaxHighlighter) {
+                m_pSyntaxHighlighter = new CSyntaxHighlighter(m_pTextEdit->document());
+                QString themePath = Settings::instance()->settings->option("advance.editor.theme")->value().toString();
+                if (themePath.contains("dark")) {
+                    m_pSyntaxHighlighter->setTheme(m_Repository.defaultTheme(KSyntaxHighlighting::Repository::DarkTheme));
+                } else {
+                    m_pSyntaxHighlighter->setTheme(m_Repository.defaultTheme(KSyntaxHighlighting::Repository::LightTheme));
+                }
+            }
+            if (m_pSyntaxHighlighter) {
+                m_pSyntaxHighlighter->setInvalidCharHighlight(true);
+            }
+        }
+
         if (m_bQuit) {
             return;
         }
@@ -1023,7 +1095,12 @@ void EditWrapper::OnUpdateHighlighter()
         auto rehighlightBlock = [this](const QTextBlock &block) {
             m_pSyntaxHighlighter->setEnableHighlight(true);
             m_pSyntaxHighlighter->rehighlightBlock(block);
-            m_pSyntaxHighlighter->setEnableHighlight(false);
+            // NUL 预览模式下保持 m_bHighlight=true，使 loadContent 的 insertText 触发的
+            // 延迟重排（contentsChange → _q_reformatBlocks）能正常重新应用 \00 高亮，
+            // 首屏立即可见无需滚动（与 master 行为一致）；普通文件仍重置 false 保留性能优化。
+            if (!m_bInvalidCharPreview) {
+                m_pSyntaxHighlighter->setEnableHighlight(false);
+            }
         };
 
         if (foundBlock.isValid() && foundBlock < beginBlock) {

diff --git a/src/editor/editwrapper.h b/src/editor/editwrapper.h
@@ -1,4 +1,4 @@
-// SPDX-FileCopyrightText: 2017 - 2023 UnionTech Software Technology Co., Ltd.
+// SPDX-FileCopyrightText: 2017-2026 UnionTech Software Technology Co., Ltd.
 //
 // SPDX-License-Identifier: GPL-3.0-or-later
 
@@ -119,6 +119,16 @@ class EditWrapper : public QWidget
     inline CSyntaxHighlighter *getSyntaxHighlighter() const
     { return m_pSyntaxHighlighter; }
 
+    // 无效字符预览模式访问器
+    inline bool isInvalidCharPreview() const
+    { return m_bInvalidCharPreview; }
+    inline bool isInvalidCharEditAllowed() const
+    { return m_bInvalidCharEditAllowed; }
+    inline QString invalidCharOriginalPath() const
+    { return m_sInvalidCharOriginalPath; }
+    void exitInvalidCharPreview();
+    bool forceSaveInvalidCharFile();
+
 signals:
     void sigClearDoubleCharaterEncode();
 
@@ -139,12 +149,13 @@ class EditWrapper : public QWidget
 public slots:
     // 处理文档预加载数据
     void handleFilePreProcess(const QByteArray &encode, const QByteArray &content);
-    void handleFileLoadFinished(const QByteArray &encode, const QByteArray &content, bool error);
+    void handleFileLoadFinished(const QByteArray &encode, const QByteArray &content, bool error, bool hasNul = false);
     void OnThemeChangeSlot(QString theme);
     void UpdateBottomBarWordCnt(int cnt);
     void OnUpdateHighlighter();
     //set the value of m_bIsTemFile
     void setTemFile(bool value);
+    void onEditAnyway();
 
 private:
     //第一次打开文件编码
@@ -180,6 +191,11 @@ public slots:
 
     bool m_bAsyncReadFileFinished = false;
     bool m_bHasPreProcess = false;               // 预处理标识
+
+    // 无效字符（NUL）预览模式状态
+    bool m_bInvalidCharPreview = false;
+    bool m_bInvalidCharEditAllowed = false;
+    QString m_sInvalidCharOriginalPath;
 };
 
 #endif