void reencodeEscapedKeyPress()

in src/agent/ConsoleInputReencoding.cc [33:121]
85 lines of code
40 McCabe index (conditional complexity)

void reencodeEscapedKeyPress(
        std::vector<INPUT_RECORD> &out,
        uint16_t virtualKey,
        uint32_t codePoint,
        uint16_t keyState) {

    struct EscapedKey {
        enum { None, Numeric, Letter } kind;
        wchar_t content[2];
    };

    EscapedKey escapeCode = {};
    switch (virtualKey) {
        case VK_UP:     escapeCode = { EscapedKey::Letter, {'A'} }; break;
        case VK_DOWN:   escapeCode = { EscapedKey::Letter, {'B'} }; break;
        case VK_RIGHT:  escapeCode = { EscapedKey::Letter, {'C'} }; break;
        case VK_LEFT:   escapeCode = { EscapedKey::Letter, {'D'} }; break;
        case VK_CLEAR:  escapeCode = { EscapedKey::Letter, {'E'} }; break;
        case VK_F1:     escapeCode = { EscapedKey::Numeric, {'1', '1'} }; break;
        case VK_F2:     escapeCode = { EscapedKey::Numeric, {'1', '2'} }; break;
        case VK_F3:     escapeCode = { EscapedKey::Numeric, {'1', '3'} }; break;
        case VK_F4:     escapeCode = { EscapedKey::Numeric, {'1', '4'} }; break;
        case VK_F5:     escapeCode = { EscapedKey::Numeric, {'1', '5'} }; break;
        case VK_F6:     escapeCode = { EscapedKey::Numeric, {'1', '7'} }; break;
        case VK_F7:     escapeCode = { EscapedKey::Numeric, {'1', '8'} }; break;
        case VK_F8:     escapeCode = { EscapedKey::Numeric, {'1', '9'} }; break;
        case VK_F9:     escapeCode = { EscapedKey::Numeric, {'2', '0'} }; break;
        case VK_F10:    escapeCode = { EscapedKey::Numeric, {'2', '1'} }; break;
        case VK_F11:    escapeCode = { EscapedKey::Numeric, {'2', '3'} }; break;
        case VK_F12:    escapeCode = { EscapedKey::Numeric, {'2', '4'} }; break;
        case VK_HOME:   escapeCode = { EscapedKey::Letter, {'H'} }; break;
        case VK_INSERT: escapeCode = { EscapedKey::Numeric, {'2'} }; break;
        case VK_DELETE: escapeCode = { EscapedKey::Numeric, {'3'} }; break;
        case VK_END:    escapeCode = { EscapedKey::Letter, {'F'} }; break;
        case VK_PRIOR:  escapeCode = { EscapedKey::Numeric, {'5'} }; break;
        case VK_NEXT:   escapeCode = { EscapedKey::Numeric, {'6'} }; break;
    }
    if (escapeCode.kind != EscapedKey::None) {
        int flags = 0;
        if (keyState & SHIFT_PRESSED)       { flags |= 0x1; }
        if (keyState & LEFT_ALT_PRESSED)    { flags |= 0x2; }
        if (keyState & LEFT_CTRL_PRESSED)   { flags |= 0x4; }
        outch(out, L'\x1b');
        outch(out, L'[');
        if (escapeCode.kind == EscapedKey::Numeric) {
            for (wchar_t ch : escapeCode.content) {
                if (ch != L'\0') {
                    outch(out, ch);
                }
            }
        } else if (flags != 0) {
            outch(out, L'1');
        }
        if (flags != 0) {
            outch(out, L';');
            outch(out, L'1' + flags);
        }
        if (escapeCode.kind == EscapedKey::Numeric) {
            outch(out, L'~');
        } else {
            outch(out, escapeCode.content[0]);
        }
        return;
    }

    switch (virtualKey) {
        case VK_BACK:
            if (keyState & LEFT_ALT_PRESSED) {
                outch(out, L'\x1b');
            }
            outch(out, L'\x7f');
            return;
        case VK_TAB:
            if (keyState & SHIFT_PRESSED) {
                outch(out, L'\x1b');
                outch(out, L'[');
                outch(out, L'Z');
                return;
            }
            break;
    }

    if (codePoint != 0) {
        if (keyState & LEFT_ALT_PRESSED) {
            outch(out, L'\x1b');
        }
        ConsoleInput::appendCPInputRecords(out, TRUE, 0, codePoint, 0);
    }
}