Add support for tmux control mode (#3656)

Author: joexue

src/cascadia/TerminalApp/TmuxControl.cpp

@@ -555,46 +555,9 @@ namespace winrt::TerminalApp::implementation
             search->second.initialized = true;
         });
 
-        control.CharSent([this, paneId](auto, auto& args) {
-            auto ch = args.Character();
-            std::wstring keys(1, static_cast<wchar_t>(ch));
-            _SendKey(paneId, keys);
-        });
-
-        control.KeySent([this, paneId](auto, auto& args) {
-            auto keyDown = args.KeyDown();
-            if (!keyDown)
-            {
-                return;
-            }
-
-            auto ch = static_cast<VirtualKey>(args.VKey());
-            std::wstring out = L"";
-            if (ch == VirtualKey::Up)
-            {
-                out = L"\033[A";
-            }
-            else if (ch == VirtualKey::Down)
-            {
-                out = L"\033[B";
-            }
-            else if (ch == VirtualKey::Right)
-            {
-                out = L"\033[C";
-            }
-            else if (ch == VirtualKey::Left)
-            {
-                out = L"\033[D";
-            }
-            else if (ch == VirtualKey::Tab)
-            {
-                out = L"\t";
-            }
-
-            if (out.size() > 0)
-            {
-                _SendKey(paneId, out);
-            }
+        connection.TerminalInput([this, paneId](auto keys) {
+            std::wstring out{ keys };
+            _SendKey(paneId, out);
         });
 
         control.GotFocus([this, windowId, paneId](auto, auto) {

src/cascadia/TerminalConnection/DummyConnection.cpp

@@ -15,8 +15,15 @@ namespace winrt::Microsoft::Terminal::TerminalConnection::implementation
     {
     }
 
-    void DummyConnection::WriteInput(const winrt::array_view<const char16_t> /*buffer*/)
+    void DummyConnection::WriteInput(const winrt::array_view<const char16_t> buffer)
     {
+        const auto data = winrt_array_to_wstring_view(buffer);
+        std::wstringstream prettyPrint;
+        for (const auto& wch : data)
+        {
+            prettyPrint << wch;
+        }
+        TerminalInput.raise(prettyPrint.str());
     }
 
     void DummyConnection::Resize(uint32_t /*rows*/, uint32_t /*columns*/) noexcept

src/cascadia/TerminalConnection/DummyConnection.h

@@ -22,6 +22,7 @@ namespace winrt::Microsoft::Terminal::TerminalConnection::implementation
         ConnectionState State() const noexcept { return ConnectionState::Connected; }
 
         til::event<TerminalOutputHandler> TerminalOutput;
+        til::event<TerminalOutputHandler> TerminalInput;
         til::typed_event<ITerminalConnection, IInspectable> StateChanged;
 
         bool _rawMode { false };

src/cascadia/TerminalConnection/DummyConnection.idl

@@ -9,6 +9,7 @@ namespace Microsoft.Terminal.TerminalConnection
     runtimeclass DummyConnection : ITerminalConnection
     {
         DummyConnection();
+        event TerminalOutputHandler TerminalInput;
     };
 
 }