Method handleEditKey

src/editor.cpp:1528–1626

// ── Edit mode key handling ──

bool RcxEditor::handleEditKey(QKeyEvent* ke) {
    // User list is handled via userListActivated signal, not here
    // SCI_AUTOCACTIVE is for autocomplete, not user lists

    switch (ke->key()) {
    case Qt::Key_Return:
    case Qt::Key_Enter:
        commitInlineEdit();
        return true;
    case Qt::Key_Tab:
        m_lastTabTarget = m_editState.target;
        commitInlineEdit();
        return true;
    case Qt::Key_Escape:
        cancelInlineEdit();
        return true;
    case Qt::Key_Up:
    case Qt::Key_Down:
    case Qt::Key_PageUp:
    case Qt::Key_PageDown:
        return true;  // block line navigation
    case Qt::Key_Delete: {
        int line, col;
        m_sci->getCursorPosition(&line, &col);
        if (col >= editEndCol()) return true;  // block at end
        return false;  // allow delete within span
    }
    case Qt::Key_Left:
    case Qt::Key_Backspace: {
        int line, col;
        m_sci->getCursorPosition(&line, &col);
        int minCol = m_editState.spanStart;
        // Don't allow backing into "0x" prefix
        if (m_editState.target == EditTarget::Value || m_editState.target == EditTarget::BaseAddress) {
            QString lineText = getLineText(m_sci, m_editState.line);
            if (lineText.mid(m_editState.spanStart, 2).startsWith(QStringLiteral("0x"), Qt::CaseInsensitive))
                minCol = m_editState.spanStart + 2;
        }
        // If there's an active selection, collapse it to the left end (Left only, not Backspace)
        if (ke->key() == Qt::Key_Left) {
            int sL, sC, eL, eC;
            m_sci->getSelection(&sL, &sC, &eL, &eC);
            if (sL >= 0 && (sL != eL || sC != eC)) {
                int leftEnd = qMax(qMin(sC, eC), minCol);
                m_sci->setCursorPosition(m_editState.line, leftEnd);
                return true;
            }
        }
        if (col <= minCol) return true;
        return false;
    }
    case Qt::Key_Right: {
        int line, col;
        m_sci->getCursorPosition(&line, &col);
        // If there's an active selection, collapse it to the right end first
        int sL, sC, eL, eC;
        m_sci->getSelection(&sL, &sC, &eL, &eC);
        if (sL >= 0 && (sL != eL || sC != eC)) {