remove obsolete title mark when inserting title mark

src/utils/veditutils.cpp

@@ -689,3 +689,49 @@ bool VEditUtils::needToCancelAutoIndent(int p_autoIndentPos, const QTextCursor &
 
     return false;
 }
+
+void VEditUtils::insertTitleMark(QTextCursor &p_cursor,
+                                 const QTextBlock &p_block,
+                                 int p_level)
+{
+    if (!p_block.isValid()) {
+        return;
+    }
+
+    Q_ASSERT(p_level >= 1 && p_level <= 6);
+
+    bool needInsert = true;
+
+    p_cursor.setPosition(p_block.position());
+
+    // Test if this block contains title marks.
+    QRegExp headerReg(VUtils::c_headerRegExp);
+    QString text = p_block.text();
+    bool matched = headerReg.exactMatch(text);
+    if (matched) {
+        int level = headerReg.cap(1).length();
+        if (level == p_level) {
+            needInsert = false;
+        } else {
+            // Remove the title mark.
+            p_cursor.movePosition(QTextCursor::NextCharacter,
+                                  QTextCursor::KeepAnchor,
+                                  level);
+            p_cursor.removeSelectedText();
+        }
+    }
+
+    // Insert titleMark + " " at the front of the block.
+    if (needInsert) {
+        // Remove the spaces at front.
+        // insertText() will remove the selection.
+        moveCursorFirstNonSpaceCharacter(p_cursor, QTextCursor::KeepAnchor);
+
+        // Insert.
+        const QString titleMark(p_level, '#');
+        p_cursor.insertText(titleMark + " ");
+    }
+
+    // Go to the end of this block.
+    p_cursor.movePosition(QTextCursor::EndOfBlock);
+}

src/utils/veditutils.h

@@ -132,7 +132,15 @@ public:
 
     // Check if we need to cancel auto indent.
     // @p_autoIndentPos: the position of the cursor after auto indent.
-    static bool needToCancelAutoIndent(int p_autoIndentPos, const QTextCursor &p_cursor);
+    static bool needToCancelAutoIndent(int p_autoIndentPos,
+                                       const QTextCursor &p_cursor);
+
+    // Insert title Mark at level @p_level in front of block @p_block
+    // If there already exists title marks, remove it first.
+    // Move cursor at the end of the block after insertion.
+    static void insertTitleMark(QTextCursor &p_cursor,
+                                const QTextBlock &p_block,
+                                int p_level);
 
 private:
     VEditUtils() {}

src/vmdeditoperations.cpp

@@ -626,33 +626,25 @@ void VMdEditOperations::changeListBlockSeqNumber(QTextBlock &p_block, int p_seq)
 
 bool VMdEditOperations::insertTitle(int p_level)
 {
-    Q_ASSERT(p_level > 0 && p_level < 7);
     QTextDocument *doc = m_editor->document();
-    QString titleMark(p_level, '#');
     QTextCursor cursor = m_editor->textCursor();
+    int firstBlock = cursor.block().blockNumber();
+    int lastBlock = firstBlock;
+
     if (cursor.hasSelection()) {
-        // Insert title # in front of the selected lines.
+        // Insert title # in front of the selected blocks.
         int start = cursor.selectionStart();
         int end = cursor.selectionEnd();
-        int startBlock = doc->findBlock(start).blockNumber();
-        int endBlock = doc->findBlock(end).blockNumber();
-        cursor.beginEditBlock();
-        cursor.clearSelection();
-        for (int i = startBlock; i <= endBlock; ++i) {
-            QTextBlock block = doc->findBlockByNumber(i);
-            cursor.setPosition(block.position(), QTextCursor::MoveAnchor);
-            cursor.insertText(titleMark + " ");
+        firstBlock = doc->findBlock(start).blockNumber();
+        lastBlock = doc->findBlock(end).blockNumber();
     }
-        cursor.movePosition(QTextCursor::EndOfBlock);
-        cursor.endEditBlock();
-    } else {
-        // Insert title # in front of current block.
+
     cursor.beginEditBlock();
-        cursor.movePosition(QTextCursor::StartOfBlock);
-        cursor.insertText(titleMark + " ");
-        cursor.movePosition(QTextCursor::EndOfBlock);
-        cursor.endEditBlock();
+    for (int i = firstBlock; i <= lastBlock; ++i) {
+        VEditUtils::insertTitleMark(cursor, doc->findBlockByNumber(i), p_level);
     }
+
+    cursor.endEditBlock();
     m_editor->setTextCursor(cursor);
     return true;
 }

src/vmdeditoperations.h

@@ -47,6 +47,10 @@ private:
     bool handleKeyEsc(QKeyEvent *p_event);
     bool handleKeyReturn(QKeyEvent *p_event);
     bool handleKeyBracketLeft(QKeyEvent *p_event);
+
+    // Insert title of level @p_level.
+    // Will detect if current block already has some leading #s. If yes,
+    // will delete it and insert the correct #s.
     bool insertTitle(int p_level);
 
     // Change the sequence number of a list block.

src/vmdtab.cpp

@@ -286,7 +286,7 @@ bool VMdTab::saveFile()
         return true;
     }
 
-    bool ret;
+    bool ret = true;
     // Make sure the file already exists. Temporary deal with cases when user delete or move
     // a file.
     QString filePath = m_file->fetchPath();
@@ -296,9 +296,8 @@ bool VMdTab::saveFile()
                             tr("File <span style=\"%1\">%2</span> being written has been removed.")
                               .arg(g_config->c_dataTextStyle).arg(filePath),
                             QMessageBox::Ok, QMessageBox::Ok, this);
-        return false;
-    }
-
+        ret = false;
+    } else {
         m_editor->saveFile();
         ret = m_file->save();
         if (!ret) {
@@ -307,6 +306,9 @@ bool VMdTab::saveFile()
                                 QMessageBox::Ok, QMessageBox::Ok, this);
             m_editor->setModified(true);
         }
+    }
+
+    updateStatus();
 
     return ret;
 }