feat: v0.7.0 —— 代码块带边框和复制按钮，代码文字不再发红

- 围栏代码块改成等宽 + 普通文字色（之前整块都是代码色，看起来像报错） - 编辑模式下给每个代码块画圆角边框，右上角一个「复制」按钮，点击把代码内容复制到剪贴板，并把按钮临时改成「已复制」 - 复制按钮跟随滚动 / 缩放重算位置，hover 时变高亮 - 源代码模式不画框也不显示按钮，保持纯源码观感 - 复制 / 已复制已加入中英文翻译 - 截图与 README 同步，版本 0.7.0
2026-10-22 18:10:02 +08:00
parent 5d1fb0fab7
commit a136ed1eaa
11 changed files with 347 additions and 130 deletions
@@ -2,7 +2,7 @@

 一个轻量的跨平台 Markdown 编辑器，基于 **Qt 5 / C++17** 构建。

-当前版本 **0.6.0**。
+当前版本 **0.7.0**。

 ## 界面

@@ -24,6 +24,8 @@
 - `Ctrl+/` 把选中内容包成围栏代码块，再按一次拆掉
 - 默认「编辑模式」隐藏 Markdown 标记、标题按级别放大，光标所在行露出原始标记
 - 行号栏、当前行高亮
+- 围栏代码块显示成带圆角边框的面板，右上角有「复制」按钮
+  （源代码模式下不显示这些装饰）
 - `Tab` / `Shift+Tab` 整行缩进，选中多行时批量缩进
 - 自动换行（`Alt+Z`）、`Ctrl+滚轮` 或 `Ctrl++` / `Ctrl+-` 缩放字号
 - 撤销 / 重做、剪切 / 复制 / 粘贴，菜单项会跟随可用状态自动灰显
@@ -1,6 +1,6 @@
 TEMPLATE = app
 TARGET   = VoiletMark
-VERSION  = 0.6.0
+VERSION  = 0.7.0

 QT += core gui widgets printsupport

@@ -4,12 +4,15 @@
 #include "ThemeManager.h"

 #include <QAbstractTextDocumentLayout>
+#include <QClipboard>
 #include <QDragEnterEvent>
 #include <QDropEvent>
 #include <QFileInfo>
 #include <QFontDatabase>
 #include <QFontMetricsF>
+#include <QGuiApplication>
 #include <QKeyEvent>
+#include <QMouseEvent>
 #include <QMimeData>
 #include <QPainter>
 #include <QPaintEvent>
@@ -17,6 +20,7 @@
 #include <QTextBlock>
 #include <QTextCursor>
 #include <QTextOption>
+#include <QTimer>
 #include <QUrl>
 #include <QWheelEvent>

@@ -88,6 +92,7 @@ MarkdownEditor::MarkdownEditor(QWidget *parent)
    setLineWrapMode(QPlainTextEdit::WidgetWidth);
    setCursorWidth(2);
    setAcceptDrops(true);
+    viewport()->setMouseTracking(true);
    document()->setDocumentMargin(18);

    m_lineNumberArea = new LineNumberArea(this);
@@ -106,9 +111,16 @@ MarkdownEditor::MarkdownEditor(QWidget *parent)
    connect(ThemeManager::instance(), &ThemeManager::schemeChanged,
            this, &MarkdownEditor::applyTheme);

+    m_fenceTimer = new QTimer(this);
+    m_fenceTimer->setSingleShot(true);
+    m_fenceTimer->setInterval(120);
+    connect(m_fenceTimer, &QTimer::timeout, this, &MarkdownEditor::rebuildCodeFences);
+    connect(this, &QPlainTextEdit::textChanged, this, [this] { m_fenceTimer->start(); });
+
    m_lineNumberArea->setVisible(m_sourceMode);
    applyEditorFont();
    updateCurrentLineHighlight();
+    rebuildCodeFences();
 }

 int MarkdownEditor::lineNumberAreaWidth() const
@@ -483,27 +495,181 @@ void MarkdownEditor::resizeEvent(QResizeEvent *event)
 void MarkdownEditor::paintEvent(QPaintEvent *event)
 {
    QPlainTextEdit::paintEvent(event);
-    if (!m_sourceMode)
+
+    QPainter painter(viewport());
+
+    if (m_sourceMode) {
+        // 源代码模式：每行底下画一条极细的分隔线，像稿纸一样。
+        QColor lineColor = ThemeManager::instance()->colors().border;
+        lineColor.setAlpha(120);
+        painter.setPen(lineColor);
+
+        QTextBlock block = firstVisibleBlock();
+        int top = qRound(blockBoundingGeometry(block).translated(contentOffset()).top());
+        int bottom = top + qRound(blockBoundingRect(block).height());
+        const int width = viewport()->width();
+
+        while (block.isValid() && top <= event->rect().bottom()) {
+            if (block.isVisible() && bottom >= event->rect().top())
+                painter.drawLine(0, bottom - 1, width, bottom - 1);
+            block = block.next();
+            top = bottom;
+            bottom = top + qRound(blockBoundingRect(block).height());
+        }
+        return;
+    }
+
+    // 编辑模式：代码块套一个圆角框，右上角给个复制按钮。
+    const ThemeColors &colors = ThemeManager::instance()->colors();
+    const QRectF visible(event->rect());
+
+    for (int index = 0; index < m_codeFences.size(); ++index) {
+        const QRectF rect = codeFenceRect(index);
+        if (!rect.isValid() || !rect.intersects(visible))
+            continue;
+
+        painter.setBrush(Qt::NoBrush);
+        painter.setPen(QPen(colors.border, 1));
+        painter.drawRoundedRect(rect.adjusted(0.5, 0.5, -0.5, -0.5), 6, 6);
+
+        const QRectF button = copyButtonRect(index);
+        if (!button.isValid())
+            continue;
+
+        QFont small = font();
+        small.setPointSizeF(qMax(7.0, font().pointSizeF() - 2.0));
+        painter.setFont(small);
+
+        const bool hovered = (m_hoveredFence == index);
+        const bool copied = (m_copiedFence == index);
+        painter.setPen(QPen(hovered ? colors.accent : colors.border, 1));
+        painter.setBrush(colors.editorBase);
+        painter.drawRoundedRect(button, 4, 4);
+        painter.setPen(copied ? colors.accent : colors.placeholder);
+        painter.drawText(button, Qt::AlignCenter, copied ? tr("已复制") : tr("复制"));
+    }
+}
+
+QRectF MarkdownEditor::codeFenceRect(int index) const
+{
+    if (index < 0 || index >= m_codeFences.size())
+        return QRectF();
+
+    const CodeFence &fence = m_codeFences.at(index);
+    const QTextBlock first = document()->findBlockByNumber(fence.open);
+    const int lastNumber = fence.close >= 0 ? fence.close : document()->blockCount() - 1;
+    const QTextBlock last = document()->findBlockByNumber(lastNumber);
+    if (!first.isValid() || !last.isValid())
+        return QRectF();
+
+    const QRectF firstRect = blockBoundingGeometry(first).translated(contentOffset());
+    const QRectF lastRect = blockBoundingGeometry(last).translated(contentOffset());
+    const qreal top = firstRect.top() - 3;
+    const qreal bottom = lastRect.bottom() + 3;
+    return QRectF(3, top, viewport()->width() - 6, bottom - top);
+}
+
+QRectF MarkdownEditor::copyButtonRect(int index) const
+{
+    const QRectF rect = codeFenceRect(index);
+    if (!rect.isValid())
+        return QRectF();
+
+    QFont small = font();
+    small.setPointSizeF(qMax(7.0, font().pointSizeF() - 2.0));
+    const QFontMetricsF metrics(small);
+    const QString label = (m_copiedFence == index) ? tr("已复制") : tr("复制");
+    const qreal width = metrics.horizontalAdvance(label) + 16;
+    const qreal height = metrics.height() + 6;
+    return QRectF(rect.right() - width - 8, rect.top() + 6, width, height);
+}
+
+QString MarkdownEditor::codeFenceText(int index) const
+{
+    if (index < 0 || index >= m_codeFences.size())
+        return QString();
+
+    const CodeFence &fence = m_codeFences.at(index);
+    const int end = fence.close >= 0 ? fence.close : document()->blockCount();
+    QStringList lines;
+    for (int number = fence.open + 1; number < end; ++number)
+        lines << document()->findBlockByNumber(number).text();
+    return lines.join(QLatin1Char('\n'));
+}
+
+void MarkdownEditor::rebuildCodeFences()
+{
+    m_codeFences.clear();
+    if (!document())
        return;

-    // 源代码模式：每行底下画一条极细的分隔线，像稿纸一样。
-    QPainter painter(viewport());
-    QColor lineColor = ThemeManager::instance()->colors().border;
-    lineColor.setAlpha(120);
-    painter.setPen(lineColor);
+    static const QRegularExpression fencePattern(QStringLiteral("^\\s{0,3}(?:```|~~~)"));
+    bool inFence = false;
+    int open = -1;

-    QTextBlock block = firstVisibleBlock();
-    int top = qRound(blockBoundingGeometry(block).translated(contentOffset()).top());
-    int bottom = top + qRound(blockBoundingRect(block).height());
-    const int width = viewport()->width();
-
-    while (block.isValid() && top <= event->rect().bottom()) {
-        if (block.isVisible() && bottom >= event->rect().top())
-            painter.drawLine(0, bottom - 1, width, bottom - 1);
-        block = block.next();
-        top = bottom;
-        bottom = top + qRound(blockBoundingRect(block).height());
+    for (QTextBlock block = document()->firstBlock(); block.isValid(); block = block.next()) {
+        if (!fencePattern.match(block.text()).hasMatch())
+            continue;
+        if (!inFence) {
+            inFence = true;
+            open = block.blockNumber();
+        } else {
+            CodeFence fence;
+            fence.open = open;
+            fence.close = block.blockNumber();
+            m_codeFences.append(fence);
+            inFence = false;
+            open = -1;
+        }
    }
+    if (inFence && open >= 0) {
+        CodeFence fence;
+        fence.open = open;
+        m_codeFences.append(fence);
+    }
+
+    viewport()->update();
+}
+
+void MarkdownEditor::mouseMoveEvent(QMouseEvent *event)
+{
+    QPlainTextEdit::mouseMoveEvent(event);
+    if (m_sourceMode)
+        return;
+
+    int hovered = -1;
+    for (int index = 0; index < m_codeFences.size(); ++index) {
+        if (copyButtonRect(index).contains(event->pos())) {
+            hovered = index;
+            break;
+        }
+    }
+
+    if (hovered != m_hoveredFence) {
+        m_hoveredFence = hovered;
+        viewport()->setCursor(hovered >= 0 ? Qt::PointingHandCursor : Qt::IBeamCursor);
+        viewport()->update();
+    }
+}
+
+void MarkdownEditor::mousePressEvent(QMouseEvent *event)
+{
+    if (!m_sourceMode && event->button() == Qt::LeftButton) {
+        for (int index = 0; index < m_codeFences.size(); ++index) {
+            if (!copyButtonRect(index).contains(event->pos()))
+                continue;
+
+            QGuiApplication::clipboard()->setText(codeFenceText(index));
+            m_copiedFence = index;
+            QTimer::singleShot(1200, this, [this] {
+                m_copiedFence = -1;
+                viewport()->update();
+            });
+            viewport()->update();
+            return;
+        }
+    }
+    QPlainTextEdit::mousePressEvent(event);
 }

 void MarkdownEditor::keyPressEvent(QKeyEvent *event)
@@ -1,9 +1,11 @@
 #pragma once

 #include <QPlainTextEdit>
+#include <QVector>

 class MarkdownHighlighter;
 class QTextBlock;
+class QTimer;

 /// 编辑器本体：等宽字体、行号栏、当前行高亮、Tab 缩进、
 /// Ctrl+滚轮缩放，以及把拖入的文件转交给主窗口打开。
@@ -42,6 +44,8 @@ signals:
 protected:
    void resizeEvent(QResizeEvent *event) override;
    void paintEvent(QPaintEvent *event) override;
+    void mouseMoveEvent(QMouseEvent *event) override;
+    void mousePressEvent(QMouseEvent *event) override;
    void keyPressEvent(QKeyEvent *event) override;
    void wheelEvent(QWheelEvent *event) override;
    void dragEnterEvent(QDragEnterEvent *event) override;
@@ -54,20 +58,34 @@ private slots:
    void updateCurrentLineHighlight();
    void updateActiveBlock();
    void applyTheme();
+    void rebuildCodeFences();

 private:
    void applyEditorFont();
    void updateViewportMargins();
    void indentSelection(bool outdent);
+    QRectF codeFenceRect(int index) const;
+    QRectF copyButtonRect(int index) const;
+    QString codeFenceText(int index) const;
    bool acceptsLocalFiles(const QMimeData *mime) const;
    void selectedBlockRange(int *firstBlock, int *lastBlock) const;
    void selectBlocks(int firstBlock, int lastBlock);
    bool enclosingFence(int firstBlock, int lastBlock,
                        QTextBlock *opener, QTextBlock *closer) const;

+    struct CodeFence {
+        int open = -1;   // 开围栏所在行
+        int close = -1;  // 闭围栏所在行，未闭合时为 -1
+    };
+
    QWidget *m_lineNumberArea = nullptr;
    MarkdownHighlighter *m_highlighter = nullptr;
    int m_fontPointSize = 12;
    bool m_sourceMode = false;
    int m_activeBlock = -1;
+
+    QVector<CodeFence> m_codeFences;
+    QTimer *m_fenceTimer = nullptr;
+    int m_hoveredFence = -1;
+    int m_copiedFence = -1;
 };
@@ -97,6 +97,12 @@ void MarkdownHighlighter::rebuildFormats()
    m_codeFormat.setFontFamilies(monospaceFamilies());
    m_codeFormat.setFontFixedPitch(true);

+    // 围栏代码块：等宽、普通文字色，不带底色——外面由编辑器画框。
+    m_fenceFormat = QTextCharFormat();
+    m_fenceFormat.setFontFamilies(monospaceFamilies());
+    m_fenceFormat.setFontFixedPitch(true);
+    m_fenceFormat.setForeground(c.editorText);
+
    m_linkFormat = QTextCharFormat();
    m_linkFormat.setForeground(c.link);
    m_linkFormat.setFontUnderline(true);
@@ -198,8 +204,13 @@ void MarkdownHighlighter::highlightBlock(const QString &text)
    if (inFence) {
        if (!fenceLine)
            setCurrentBlockState(StateInFence);
-        if (rendered && fenceLine && !active) {
-            apply(0, text.length(), hiddenFormat(c.editorBase));
+        if (rendered) {
+            if (fenceLine && !active) {
+                apply(0, text.length(), hiddenFormat(c.editorBase));
+            } else {
+                m_blockBase = m_fenceFormat;
+                apply(0, text.length(), m_fenceFormat);
+            }
        } else {
            m_blockBase = m_codeFormat;
            apply(0, text.length(), m_codeFormat);
@@ -208,10 +219,14 @@ void MarkdownHighlighter::highlightBlock(const QString &text)
    }
    if (fenceLine) {
        setCurrentBlockState(StateInFence);
-        if (rendered && !active)
-            apply(0, text.length(), hiddenFormat(c.editorBase));
-        else
+        if (rendered) {
+            if (!active)
+                apply(0, text.length(), hiddenFormat(c.editorBase));
+            else
+                apply(0, text.length(), m_fenceFormat);
+        } else {
            apply(0, text.length(), m_codeFormat);
+        }
        return;
    }

@@ -55,6 +55,7 @@ private:
    QTextCharFormat m_boldItalicFormat;
    QTextCharFormat m_emphasisFormat;
    QTextCharFormat m_codeFormat;
+    QTextCharFormat m_fenceFormat;
    QTextCharFormat m_linkFormat;
    QTextCharFormat m_urlFormat;
    QTextCharFormat m_quoteFormat;
@@ -3,372 +3,387 @@
 <context>
    <name>MainWindow</name>
    <message>
-        <location filename="../src/MainWindow.cpp" line="167" />
-        <location filename="../src/MainWindow.cpp" line="781" />
+        <location filename="../src/MainWindow.cpp" line="170" />
+        <location filename="../src/MainWindow.cpp" line="784" />
        <source>新建</source>
        <translation>New</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="171" />
-        <location filename="../src/MainWindow.cpp" line="782" />
+        <location filename="../src/MainWindow.cpp" line="174" />
+        <location filename="../src/MainWindow.cpp" line="785" />
        <source>打开…</source>
        <translation>Open…</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="175" />
-        <location filename="../src/MainWindow.cpp" line="784" />
+        <location filename="../src/MainWindow.cpp" line="178" />
+        <location filename="../src/MainWindow.cpp" line="787" />
        <source>保存</source>
        <translation>Save</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="179" />
-        <location filename="../src/MainWindow.cpp" line="785" />
+        <location filename="../src/MainWindow.cpp" line="182" />
+        <location filename="../src/MainWindow.cpp" line="788" />
        <source>另存为…</source>
        <translation>Save As…</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="183" />
-        <location filename="../src/MainWindow.cpp" line="786" />
+        <location filename="../src/MainWindow.cpp" line="186" />
+        <location filename="../src/MainWindow.cpp" line="789" />
        <source>导出 PDF…</source>
        <translation>Export PDF…</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="187" />
-        <location filename="../src/MainWindow.cpp" line="787" />
+        <location filename="../src/MainWindow.cpp" line="190" />
+        <location filename="../src/MainWindow.cpp" line="790" />
        <source>退出</source>
        <translation>Quit</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="191" />
-        <location filename="../src/MainWindow.cpp" line="789" />
+        <location filename="../src/MainWindow.cpp" line="194" />
+        <location filename="../src/MainWindow.cpp" line="792" />
        <source>撤销</source>
        <translation>Undo</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="195" />
-        <location filename="../src/MainWindow.cpp" line="790" />
+        <location filename="../src/MainWindow.cpp" line="198" />
+        <location filename="../src/MainWindow.cpp" line="793" />
        <source>重做</source>
        <translation>Redo</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="199" />
-        <location filename="../src/MainWindow.cpp" line="791" />
+        <location filename="../src/MainWindow.cpp" line="202" />
+        <location filename="../src/MainWindow.cpp" line="794" />
        <source>剪切</source>
        <translation>Cut</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="203" />
-        <location filename="../src/MainWindow.cpp" line="792" />
+        <location filename="../src/MainWindow.cpp" line="206" />
+        <location filename="../src/MainWindow.cpp" line="795" />
        <source>复制</source>
        <translation>Copy</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="207" />
-        <location filename="../src/MainWindow.cpp" line="793" />
+        <location filename="../src/MainWindow.cpp" line="210" />
+        <location filename="../src/MainWindow.cpp" line="796" />
        <source>粘贴</source>
        <translation>Paste</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="211" />
-        <location filename="../src/MainWindow.cpp" line="794" />
+        <location filename="../src/MainWindow.cpp" line="214" />
+        <location filename="../src/MainWindow.cpp" line="797" />
        <source>全选</source>
        <translation>Select All</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="215" />
-        <location filename="../src/MainWindow.cpp" line="798" />
+        <location filename="../src/MainWindow.cpp" line="218" />
+        <location filename="../src/MainWindow.cpp" line="801" />
        <source>自动换行</source>
        <translation>Word Wrap</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="220" />
-        <location filename="../src/MainWindow.cpp" line="799" />
+        <location filename="../src/MainWindow.cpp" line="223" />
+        <location filename="../src/MainWindow.cpp" line="802" />
        <source>放大</source>
        <translation>Zoom In</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="224" />
-        <location filename="../src/MainWindow.cpp" line="800" />
+        <location filename="../src/MainWindow.cpp" line="227" />
+        <location filename="../src/MainWindow.cpp" line="803" />
        <source>缩小</source>
        <translation>Zoom Out</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="228" />
-        <location filename="../src/MainWindow.cpp" line="801" />
+        <location filename="../src/MainWindow.cpp" line="231" />
+        <location filename="../src/MainWindow.cpp" line="804" />
        <source>实际大小</source>
        <translation>Actual Size</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="237" />
-        <location filename="../src/MainWindow.cpp" line="783" />
+        <location filename="../src/MainWindow.cpp" line="240" />
+        <location filename="../src/MainWindow.cpp" line="786" />
        <source>打开文件夹…</source>
        <translation>Open Folder…</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="241" />
-        <location filename="../src/MainWindow.cpp" line="407" />
-        <location filename="../src/MainWindow.cpp" line="796" />
-        <location filename="../src/MainWindow.cpp" line="817" />
+        <location filename="../src/MainWindow.cpp" line="244" />
+        <location filename="../src/MainWindow.cpp" line="410" />
+        <location filename="../src/MainWindow.cpp" line="799" />
+        <location filename="../src/MainWindow.cpp" line="820" />
        <source>侧栏</source>
        <translation>Sidebar</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="255" />
-        <location filename="../src/MainWindow.cpp" line="797" />
+        <location filename="../src/MainWindow.cpp" line="258" />
+        <location filename="../src/MainWindow.cpp" line="800" />
        <source>源代码模式</source>
        <translation>Source Mode</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="260" />
-        <location filename="../src/MainWindow.cpp" line="813" />
+        <location filename="../src/MainWindow.cpp" line="263" />
+        <location filename="../src/MainWindow.cpp" line="816" />
        <source>代码块</source>
        <translation>Code Block</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="267" />
-        <location filename="../src/MainWindow.cpp" line="811" />
+        <location filename="../src/MainWindow.cpp" line="270" />
+        <location filename="../src/MainWindow.cpp" line="814" />
        <source>标题 %1</source>
        <translation>Heading %1</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="278" />
+        <location filename="../src/MainWindow.cpp" line="281" />
        <source>文件夹</source>
        <translation>Folder</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="289" />
-        <location filename="../src/MainWindow.cpp" line="961" />
+        <location filename="../src/MainWindow.cpp" line="292" />
+        <location filename="../src/MainWindow.cpp" line="964" />
        <source>未打开文件夹</source>
        <translation>No folder open</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="315" />
-        <location filename="../src/MainWindow.cpp" line="771" />
+        <location filename="../src/MainWindow.cpp" line="318" />
+        <location filename="../src/MainWindow.cpp" line="774" />
        <source>文件</source>
        <translation>File</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="319" />
-        <location filename="../src/MainWindow.cpp" line="776" />
+        <location filename="../src/MainWindow.cpp" line="322" />
+        <location filename="../src/MainWindow.cpp" line="779" />
        <source>最近打开</source>
        <translation>Recent Files</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="327" />
-        <location filename="../src/MainWindow.cpp" line="772" />
+        <location filename="../src/MainWindow.cpp" line="330" />
+        <location filename="../src/MainWindow.cpp" line="775" />
        <source>编辑</source>
        <translation>Edit</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="337" />
-        <location filename="../src/MainWindow.cpp" line="773" />
+        <location filename="../src/MainWindow.cpp" line="340" />
+        <location filename="../src/MainWindow.cpp" line="776" />
        <source>视图</source>
        <translation>View</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="348" />
-        <location filename="../src/MainWindow.cpp" line="777" />
+        <location filename="../src/MainWindow.cpp" line="351" />
+        <location filename="../src/MainWindow.cpp" line="780" />
        <source>主题</source>
        <translation>Theme</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="356" />
-        <location filename="../src/MainWindow.cpp" line="807" />
+        <location filename="../src/MainWindow.cpp" line="359" />
+        <location filename="../src/MainWindow.cpp" line="810" />
        <source>6:00–18:00 使用浅色，其余时间使用深色</source>
        <translation>Light from 6:00 to 18:00, dark the rest of the day</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="374" />
-        <location filename="../src/MainWindow.cpp" line="779" />
+        <location filename="../src/MainWindow.cpp" line="377" />
+        <location filename="../src/MainWindow.cpp" line="782" />
        <source>语言</source>
        <translation>Language</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="391" />
-        <location filename="../src/MainWindow.cpp" line="774" />
+        <location filename="../src/MainWindow.cpp" line="394" />
+        <location filename="../src/MainWindow.cpp" line="777" />
        <source>格式</source>
        <translation>Format</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="392" />
-        <location filename="../src/MainWindow.cpp" line="778" />
+        <location filename="../src/MainWindow.cpp" line="395" />
+        <location filename="../src/MainWindow.cpp" line="781" />
        <source>标题</source>
        <translation>Heading</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="399" />
-        <location filename="../src/MainWindow.cpp" line="775" />
+        <location filename="../src/MainWindow.cpp" line="402" />
+        <location filename="../src/MainWindow.cpp" line="778" />
        <source>帮助</source>
        <translation>Help</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="400" />
-        <location filename="../src/MainWindow.cpp" line="814" />
-        <location filename="../src/MainWindow.cpp" line="844" />
+        <location filename="../src/MainWindow.cpp" line="403" />
+        <location filename="../src/MainWindow.cpp" line="817" />
+        <location filename="../src/MainWindow.cpp" line="847" />
        <source>关于 VoiletMark</source>
        <translation>About VoiletMark</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="411" />
-        <location filename="../src/MainWindow.cpp" line="818" />
+        <location filename="../src/MainWindow.cpp" line="414" />
+        <location filename="../src/MainWindow.cpp" line="821" />
        <source>显示 / 隐藏文件夹侧栏（Ctrl+B）</source>
        <translation>Show / hide the folder sidebar (Ctrl+B)</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="419" />
-        <location filename="../src/MainWindow.cpp" line="821" />
+        <location filename="../src/MainWindow.cpp" line="422" />
+        <location filename="../src/MainWindow.cpp" line="824" />
        <source>源代码模式：关闭语法高亮与行号（Ctrl+Shift+M）</source>
        <translation>Source mode: turn off highlighting and line numbers (Ctrl+Shift+M)</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="497" />
-        <location filename="../src/MainWindow.cpp" line="612" />
+        <location filename="../src/MainWindow.cpp" line="500" />
+        <location filename="../src/MainWindow.cpp" line="615" />
        <source>未命名</source>
        <translation>Untitled</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="546" />
+        <location filename="../src/MainWindow.cpp" line="549" />
        <source>打开 Markdown 文件</source>
        <translation>Open Markdown File</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="547" />
+        <location filename="../src/MainWindow.cpp" line="550" />
        <source>Markdown 文件 (*.md *.markdown *.mdown *.mkd);;文本文件 (*.txt);;所有文件 (*)</source>
        <translation>Markdown files (*.md *.markdown *.mdown *.mkd);;Text files (*.txt);;All files (*)</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="564" />
+        <location filename="../src/MainWindow.cpp" line="567" />
        <source>无法打开文件</source>
        <translation>Cannot Open File</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="565" />
+        <location filename="../src/MainWindow.cpp" line="568" />
        <source>读取「%1」失败：%2</source>
        <translation>Could not read "%1": %2</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="599" />
+        <location filename="../src/MainWindow.cpp" line="602" />
        <source>另存为</source>
        <translation>Save As</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="600" />
+        <location filename="../src/MainWindow.cpp" line="603" />
        <source>Markdown 文件 (*.md);;文本文件 (*.txt);;所有文件 (*)</source>
        <translation>Markdown files (*.md);;Text files (*.txt);;All files (*)</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="617" />
+        <location filename="../src/MainWindow.cpp" line="620" />
        <source>导出 PDF</source>
        <translation>Export PDF</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="618" />
+        <location filename="../src/MainWindow.cpp" line="621" />
        <source>PDF 文件 (*.pdf)</source>
        <translation>PDF files (*.pdf)</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="637" />
+        <location filename="../src/MainWindow.cpp" line="640" />
        <source>导出失败</source>
        <translation>Export Failed</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="638" />
+        <location filename="../src/MainWindow.cpp" line="641" />
        <source>没能写出「%1」，换个位置再试一次。</source>
        <translation>Could not write "%1". Try another location.</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="642" />
+        <location filename="../src/MainWindow.cpp" line="645" />
        <source>已导出 %1</source>
        <translation>Exported to %1</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="657" />
-        <location filename="../src/MainWindow.cpp" line="664" />
-        <location filename="../src/MainWindow.cpp" line="669" />
+        <location filename="../src/MainWindow.cpp" line="660" />
+        <location filename="../src/MainWindow.cpp" line="667" />
+        <location filename="../src/MainWindow.cpp" line="672" />
        <source>无法保存文件</source>
        <translation>Cannot Save File</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="658" />
+        <location filename="../src/MainWindow.cpp" line="661" />
        <source>写入「%1」失败：%2</source>
        <translation>Could not write "%1": %2</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="665" />
+        <location filename="../src/MainWindow.cpp" line="668" />
        <source>写入「%1」时发生错误。</source>
        <translation>An error occurred while writing "%1".</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="670" />
+        <location filename="../src/MainWindow.cpp" line="673" />
        <source>提交「%1」失败：%2</source>
        <translation>Could not commit "%1": %2</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="678" />
+        <location filename="../src/MainWindow.cpp" line="681" />
        <source>已保存 %1</source>
        <translation>Saved to %1</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="688" />
+        <location filename="../src/MainWindow.cpp" line="691" />
        <source>VoiletMark</source>
        <translation>VoiletMark</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="689" />
+        <location filename="../src/MainWindow.cpp" line="692" />
        <source>「%1」有未保存的修改，是否保存？</source>
        <translation>"%1" has unsaved changes. Save them?</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="713" />
+        <location filename="../src/MainWindow.cpp" line="716" />
        <source>%1[*] — VoiletMark</source>
        <translation>%1[*] — VoiletMark</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="732" />
+        <location filename="../src/MainWindow.cpp" line="735" />
        <source>行 %1，列 %2</source>
        <translation>Line %1, Col %2</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="734" />
+        <location filename="../src/MainWindow.cpp" line="737" />
        <source>    已选 %1 字</source>
        <translation>    %1 selected</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="735" />
+        <location filename="../src/MainWindow.cpp" line="738" />
        <source>    %1 字</source>
        <translation>    %1 chars</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="848" />
+        <location filename="../src/MainWindow.cpp" line="851" />
        <source>&lt;h3&gt;VoiletMark %1&lt;/h3&gt;&lt;p&gt;一个轻量的跨平台 Markdown 编辑器。&lt;/p&gt;&lt;p&gt;基于 Qt %2 与 C++17 构建。&lt;/p&gt;</source>
        <translation>&lt;h3&gt;VoiletMark %1&lt;/h3&gt;&lt;p&gt;A lightweight cross-platform Markdown editor.&lt;/p&gt;&lt;p&gt;Built with Qt %2 and C++17.&lt;/p&gt;</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="883" />
+        <location filename="../src/MainWindow.cpp" line="886" />
        <source>（暂无记录）</source>
        <translation>(none)</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="896" />
+        <location filename="../src/MainWindow.cpp" line="899" />
        <source>清空列表</source>
        <translation>Clear List</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="906" />
+        <location filename="../src/MainWindow.cpp" line="909" />
        <source>打开文件夹</source>
        <translation>Open Folder</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="962" />
+        <location filename="../src/MainWindow.cpp" line="965" />
        <source>文件 → 打开文件夹…</source>
        <translation>File → Open Folder…</translation>
    </message>
    <message>
-        <location filename="../src/MainWindow.cpp" line="998" />
+        <location filename="../src/MainWindow.cpp" line="1001" />
        <source>（没有 Markdown 文件）</source>
        <translation>(no Markdown files)</translation>
    </message>
 </context>
+<context>
+    <name>MarkdownEditor</name>
+    <message>
+        <location filename="../src/MarkdownEditor.cpp" line="549" />
+        <location filename="../src/MarkdownEditor.cpp" line="581" />
+        <source>已复制</source>
+        <translation>Copied</translation>
+    </message>
+    <message>
+        <location filename="../src/MarkdownEditor.cpp" line="549" />
+        <location filename="../src/MarkdownEditor.cpp" line="581" />
+        <source>复制</source>
+        <translation>Copy</translation>
+    </message>
+</context>
 <context>
    <name>QObject</name>
    <message>