Update Cascadia Code to 2008.25 (#7403)

(cherry picked from commit 0488c5322c)

.github/actions/spell-check/expect/af1ff90dc512c83c902762b02f284c1c61603b4a.txt

@@ -0,0 +1,10 @@
+abcd
+dst
+EFG
+EFGh
+EMPTYBOX
+GFEh
+nrcs
+Remoting
+Scs
+Shobjidl

.github/actions/spell-check/expect/expect.txt

@@ -99,7 +99,6 @@ AStomps
 ASYNCWINDOWPOS
 atch
 ATest
-atg
 attr
 ATTRCOLOR
 aumid
@@ -160,7 +159,6 @@ bitsavers
 bitset
 BKCOLOR
 BKGND
-BKMK
 Bksp
 blog
 Blt
@@ -295,7 +293,6 @@ codepage
 codepoint
 codeproject
 COINIT
-colo
 colorizing
 colororacle
 colorref
@@ -352,7 +349,6 @@ conpty
 conptylib
 consecteturadipiscingelit
 conserv
-consoleaccessibility
 consoleapi
 CONSOLECONTROL
 CONSOLEENDTASK
@@ -640,7 +636,6 @@ DROPDOWNLIST
 DROPFILES
 drv
 dsm
-Dst
 DSwap
 DTest
 dtor
@@ -683,7 +678,6 @@ Elems
 elif
 elseif
 emacs
-emptybox
 enabledelayedexpansion
 endian
 endif
@@ -752,7 +746,6 @@ fdw
 fea
 fesb
 FFDE
-FFF
 FFrom
 FGCOLOR
 fgetc
@@ -769,7 +762,6 @@ FILETYPE
 FILEW
 FILLATTR
 FILLCONSOLEOUTPUT
-Filledbox
 FILTERONPASTE
 finalizer
 FINDCASE
@@ -821,7 +813,6 @@ fsproj
 fstream
 fte
 Ftm
-fullcolor
 fullscreen
 fullwidth
 func
@@ -1011,7 +1002,6 @@ hwheel
 hwnd
 HWNDPARENT
 hxx
-hyperlink
 IAccessibility
 IAction
 IApi
@@ -1034,7 +1024,6 @@ ICore
 IData
 IDCANCEL
 IDD
-IDefault
 IDesktop
 IDictionary
 IDISHWND
@@ -1384,7 +1373,6 @@ mincore
 mindbogglingly
 mingw
 minkernel
-minmax
 minwin
 minwindef
 Mip
@@ -1545,7 +1533,6 @@ NOYIELD
 NOZORDER
 NPM
 npos
-NRCS
 NSTATUS
 ntapi
 ntcon
@@ -1722,7 +1709,6 @@ pguid
 pgup
 PHANDLE
 phhook
-phsl
 phwnd
 pid
 pidl
@@ -1752,7 +1738,6 @@ POBJECT
 Podcast
 POINTSLIST
 POLYTEXTW
-popclip
 popd
 POPF
 poppack
@@ -1935,7 +1920,6 @@ REGSTR
 reingest
 Relayout
 RELBINPATH
-remoting
 renderengine
 rendersize
 reparent
@@ -1943,7 +1927,6 @@ reparenting
 replatformed
 Replymessage
 repositorypath
-rerendered
 rescap
 Resequence
 Reserialize
@@ -1989,7 +1972,6 @@ RMENU
 roadmap
 robomac
 roundtrip
-ROWSTOSCROLL
 rparen
 RRF
 RRRGGGBB
@@ -2051,7 +2033,6 @@ SCROLLSCALE
 SCROLLSCREENBUFFER
 Scrollup
 Scrolluppage
-SCS
 scursor
 sddl
 sdeleted
@@ -2121,7 +2102,6 @@ Shl
 shlguid
 shlobj
 shlwapi
-shobjidl
 SHORTPATH
 SHOWCURSOR
 SHOWMAXIMIZED
@@ -2194,14 +2174,11 @@ STARTWPARMSW
 Statusline
 stdafx
 STDAPI
-stdarg
 stdcall
-stddef
 stderr
 stdexcept
 stdin
 stdio
-stdlib
 STDMETHODCALLTYPE
 STDMETHODIMP
 stdout
@@ -2295,7 +2272,6 @@ telnetd
 telnetpp
 templated
 terminalcore
-terminalnuget
 TERMINALSCROLLING
 terminfo
 TEs
@@ -2351,7 +2327,6 @@ TMult
 tmultiple
 tmux
 todo
-Tofill
 tofrom
 tokenhelpers
 tokenized
@@ -2447,7 +2422,6 @@ undef
 Unescape
 unexpand
 Unfocus
-unfocuses
 unhighlighting
 unhosted
 unicode
@@ -2753,33 +2727,26 @@ WWith
 wx
 wxh
 xa
-xab
 xact
 xamarin
 xaml
 Xamlmeta
 xargs
 xaz
-xb
-xbc
 xbf
 xbutton
 XBUTTONDBLCLK
 XBUTTONDOWN
 XBUTTONUP
-xca
 XCast
-xce
 XCENTER
 XColors
 xcopy
 XCount
-xdd
 xdy
 xe
 XEncoding
 xff
-xffff
 XFile
 xlang
 XManifest

build/pipelines/templates/build-console-steps.yml

@@ -34,7 +34,7 @@ steps:
     configuration: '$(BuildConfiguration)'
     msbuildArgs: "${{ parameters.additionalBuildArguments }}"
     clean: true
-    maximumCpuCount: true
+    maximumCpuCount: false
 
 - task: PowerShell@2
   displayName: 'Check MSIX for common regressions'

doc/cascadia/SettingsSchema.md

@@ -158,7 +158,7 @@ For commands with arguments:
 | ---- | ---- |
 | Function and Alphanumeric Keys | `f1-f24`, `a-z`, `0-9` |
 | Symbols | ``` ` ```, `-`, `=`, `[`, `]`, `\`, `;`, `'`, `,`, `.`, `/` |
-| Arrow Keys | `down`, `left`, `right`, `up`, `pagedown`, `pageup`, `pgdn`, `pgup`, `end`, `home`, `plus` |
+| Arrow Keys | `down`, `left`, `right`, `up`, `pagedown`, `pageup`, `pgdn`, `pgup`, `end`, `home`, `plus`, `app`, `menu` |
 | Action Keys | `tab`, `enter`, `esc`, `escape`, `space`, `backspace`, `delete`, `insert` |
 | Numpad Keys | `numpad_0-numpad_9`, `numpad0-numpad9`, `numpad_add`, `numpad_plus`, `numpad_decimal`, `numpad_period`, `numpad_divide`, `numpad_minus`, `numpad_subtract`, `numpad_multiply` |
 

doc/cascadia/profiles.schema.json

@@ -4,9 +4,9 @@
   "title": "Microsoft's Windows Terminal Settings Profile Schema",
   "definitions": {
     "KeyChordSegment": {
-      "pattern": "^(?<modifier>(ctrl|alt|shift)(?:\\+(ctrl|alt|shift)(?<!\\2))?(?:\\+(ctrl|alt|shift)(?<!\\2|\\3))?\\+)?(?<key>[^\\s+]|backspace|tab|enter|esc|escape|space|pgup|pageup|pgdn|pagedown|end|home|left|up|right|down|insert|delete|(?<!shift.+)(?:numpad_?[0-9]|numpad_(?:period|decimal))|numpad_(?:multiply|plus|add|minus|subtract|divide)|f[1-9]|f1[0-9]|f2[0-4]|plus)$",
+      "pattern": "^(?<modifier>(ctrl|alt|shift)(?:\\+(ctrl|alt|shift)(?<!\\2))?(?:\\+(ctrl|alt|shift)(?<!\\2|\\3))?\\+)?(?<key>[^\\s+]|app|menu|backspace|tab|enter|esc|escape|space|pgup|pageup|pgdn|pagedown|end|home|left|up|right|down|insert|delete|(?<!shift.+)(?:numpad_?[0-9]|numpad_(?:period|decimal))|numpad_(?:multiply|plus|add|minus|subtract|divide)|f[1-9]|f1[0-9]|f2[0-4]|plus)$",
       "type": "string",
-      "description": "The string should fit the format \"[ctrl+][alt+][shift+]<keyName>\", where each modifier is optional, separated by + symbols, and keyName is either one of the names listed in the table below, or any single key character. The string should be written in full lowercase.\nbackspace\tBACKSPACE key\ntab\tTAB key\nenter\tENTER key\nesc, escape\tESC key\nspace\tSPACEBAR\npgup, pageup\tPAGE UP key\npgdn, pagedown\tPAGE DOWN key\nend\tEND key\nhome\tHOME key\nleft\tLEFT ARROW key\nup\tUP ARROW key\nright\tRIGHT ARROW key\ndown\tDOWN ARROW key\ninsert\tINS key\ndelete\tDEL key\nnumpad_0-numpad_9, numpad0-numpad9\tNumeric keypad keys 0 to 9. Can't be combined with the shift modifier.\nnumpad_multiply\tNumeric keypad MULTIPLY key (*)\nnumpad_plus, numpad_add\tNumeric keypad ADD key (+)\nnumpad_minus, numpad_subtract\tNumeric keypad SUBTRACT key (-)\nnumpad_period, numpad_decimal\tNumeric keypad DECIMAL key (.). Can't be combined with the shift modifier.\nnumpad_divide\tNumeric keypad DIVIDE key (/)\nf1-f24\tF1 to F24 function keys\nplus\tADD key (+)"
+      "description": "The string should fit the format \"[ctrl+][alt+][shift+]<keyName>\", where each modifier is optional, separated by + symbols, and keyName is either one of the names listed in the table below, or any single key character. The string should be written in full lowercase.\napp, menu\tMENU key\nbackspace\tBACKSPACE key\ntab\tTAB key\nenter\tENTER key\nesc, escape\tESC key\nspace\tSPACEBAR\npgup, pageup\tPAGE UP key\npgdn, pagedown\tPAGE DOWN key\nend\tEND key\nhome\tHOME key\nleft\tLEFT ARROW key\nup\tUP ARROW key\nright\tRIGHT ARROW key\ndown\tDOWN ARROW key\ninsert\tINS key\ndelete\tDEL key\nnumpad_0-numpad_9, numpad0-numpad9\tNumeric keypad keys 0 to 9. Can't be combined with the shift modifier.\nnumpad_multiply\tNumeric keypad MULTIPLY key (*)\nnumpad_plus, numpad_add\tNumeric keypad ADD key (+)\nnumpad_minus, numpad_subtract\tNumeric keypad SUBTRACT key (-)\nnumpad_period, numpad_decimal\tNumeric keypad DECIMAL key (.). Can't be combined with the shift modifier.\nnumpad_divide\tNumeric keypad DIVIDE key (/)\nf1-f24\tF1 to F24 function keys\nplus\tADD key (+)"
     },
     "Color": {
       "default": "#",
@@ -392,10 +392,16 @@
           "minimum": 1,
           "type": "integer"
         },
+        "startOnUserLogin": {
+          "default": false,
+          "description": "When set to true, this enables the launch of Windows Terminal at startup. Setting this to false will disable the startup task entry. If the Windows Terminal startup task entry is disabled either by org policy or by user action this setting will have no effect.",
+          "type": "boolean"
+        },
         "launchMode": {
           "default": "default",
-          "description": "Defines whether the Terminal will launch as maximized or not.",
+          "description": "Defines whether the terminal will launch as maximized, full screen, or in a window.",
           "enum": [
+            "fullscreen",
             "maximized",
             "default"
           ],

res/README.md

@@ -17,5 +17,5 @@ Please consult the [license](https://raw.githubusercontent.com/microsoft/cascadi
 
 ### Fonts Included
 
-* Cascadia Code, Cascadia Mono (2007.15)
-   * from microsoft/cascadia-code@2a54363b2c867f7ae811b9a034c0024cef67de96
+* Cascadia Code, Cascadia Mono (2008.25)
+   * from microsoft/cascadia-code@678eea921b0c8b921b9fb009bb16d3d2ca5b8112

src/buffer/out/UnicodeStorage.cpp

@@ -35,6 +35,11 @@ void UnicodeStorage::StoreGlyph(const key_type key, const mapped_type& glyph)
 // - erases key and its associated data from the storage
 // Arguments:
 // - key - the key to remove
+// ~~~~~~~~~~~~~~
+// NOTE: VS 16.7 changes std::map::erase to noexcept, but the build agents are still 16.6.5.
+// Ignore this audit warning on your dev box until the build starts failing. Then fix it
+// and remove this comment.
+// ~~~~~~~~~~~~~
 void UnicodeStorage::Erase(const key_type key)
 {
     _map.erase(key);

src/cascadia/LocalTests_TerminalApp/SettingsTests.cpp

@@ -2354,7 +2354,7 @@ namespace TerminalAppLocalTests
                     "commandline": "wsl.exe"
                 }
             ],
-            "bindings": [
+            "actions": [
                 { "keys": "ctrl+a",                   "command": { "action": "splitPane", "split": "vertical" } },
                 {                   "name": "ctrl+b", "command": { "action": "splitPane", "split": "vertical" } },
                 { "keys": "ctrl+c", "name": "ctrl+c", "command": { "action": "splitPane", "split": "vertical" } },
@@ -2528,5 +2528,4 @@ namespace TerminalAppLocalTests
             VERIFY_IS_TRUE(realArgs.TerminalArgs().Profile().empty());
         }
     }
-
 }

src/cascadia/PublicTerminalCore/HwndTerminal.cpp

@@ -16,12 +16,35 @@ using namespace ::Microsoft::Terminal::Core;
 
 static LPCWSTR term_window_class = L"HwndTerminalClass";
 
+// This magic flag is "documented" at https://msdn.microsoft.com/en-us/library/windows/desktop/ms646301(v=vs.85).aspx
+// "If the high-order bit is 1, the key is down; otherwise, it is up."
+static constexpr short KeyPressed{ gsl::narrow_cast<short>(0x8000) };
+
 static constexpr bool _IsMouseMessage(UINT uMsg)
 {
     return uMsg == WM_LBUTTONDOWN || uMsg == WM_LBUTTONUP || uMsg == WM_LBUTTONDBLCLK ||
            uMsg == WM_MBUTTONDOWN || uMsg == WM_MBUTTONUP || uMsg == WM_MBUTTONDBLCLK ||
            uMsg == WM_RBUTTONDOWN || uMsg == WM_RBUTTONUP || uMsg == WM_RBUTTONDBLCLK ||
-           uMsg == WM_MOUSEMOVE || uMsg == WM_MOUSEWHEEL;
+           uMsg == WM_MOUSEMOVE || uMsg == WM_MOUSEWHEEL || uMsg == WM_MOUSEHWHEEL;
+}
+
+// Helper static function to ensure that all ambiguous-width glyphs are reported as narrow.
+// See microsoft/terminal#2066 for more info.
+static bool _IsGlyphWideForceNarrowFallback(const std::wstring_view /* glyph */) noexcept
+{
+    return false; // glyph is not wide.
+}
+
+static bool _EnsureStaticInitialization()
+{
+    // use C++11 magic statics to make sure we only do this once.
+    static bool initialized = []() {
+        // *** THIS IS A SINGLETON ***
+        SetGlyphWidthFallback(_IsGlyphWideForceNarrowFallback);
+
+        return true;
+    }();
+    return initialized;
 }
 
 LRESULT CALLBACK HwndTerminal::HwndTerminalWndProc(
@@ -36,10 +59,31 @@ try
 
     if (terminal)
     {
-        if (_IsMouseMessage(uMsg) && terminal->_CanSendVTMouseInput())
+        if (_IsMouseMessage(uMsg))
         {
-            if (terminal->_SendMouseEvent(uMsg, wParam, lParam))
+            if (terminal->_CanSendVTMouseInput() && terminal->_SendMouseEvent(uMsg, wParam, lParam))
             {
+                // GH#6401: Capturing the mouse ensures that we get drag/release events
+                // even if the user moves outside the window.
+                // _SendMouseEvent returns false if the terminal's not in VT mode, so we'll
+                // fall through to release the capture.
+                switch (uMsg)
+                {
+                case WM_LBUTTONDOWN:
+                case WM_MBUTTONDOWN:
+                case WM_RBUTTONDOWN:
+                    SetCapture(hwnd);
+                    break;
+                case WM_LBUTTONUP:
+                case WM_MBUTTONUP:
+                case WM_RBUTTONUP:
+                    ReleaseCapture();
+                    break;
+                default:
+                    break;
+                }
+
+                // Suppress all mouse events that made it into the terminal.
                 return 0;
             }
         }
@@ -57,6 +101,10 @@ try
             return 0;
         case WM_LBUTTONUP:
             terminal->_singleClickTouchdownPos = std::nullopt;
+            [[fallthrough]];
+        case WM_MBUTTONUP:
+        case WM_RBUTTONUP:
+            ReleaseCapture();
             break;
         case WM_MOUSEMOVE:
             if (WI_IsFlagSet(wParam, MK_LBUTTON))
@@ -72,7 +120,7 @@ try
                 {
                     const auto bufferData = terminal->_terminal->RetrieveSelectedTextFromBuffer(false);
                     LOG_IF_FAILED(terminal->_CopyTextToSystemClipboard(bufferData, true));
-                    terminal->_terminal->ClearSelection();
+                    TerminalClearSelection(terminal);
                 }
                 CATCH_LOG();
             }
@@ -81,6 +129,13 @@ try
                 terminal->_PasteTextFromClipboard();
             }
             return 0;
+        case WM_DESTROY:
+            // Release Terminal's hwnd so Teardown doesn't try to destroy it again
+            terminal->_hwnd.release();
+            terminal->Teardown();
+            return 0;
+        default:
+            break;
         }
     }
     return DefWindowProc(hwnd, uMsg, wParam, lParam);
@@ -114,14 +169,16 @@ static bool RegisterTermClass(HINSTANCE hInstance) noexcept
 }
 
 HwndTerminal::HwndTerminal(HWND parentHwnd) :
-    _desiredFont{ L"Consolas", 0, 10, { 0, 14 }, CP_UTF8 },
-    _actualFont{ L"Consolas", 0, 10, { 0, 14 }, CP_UTF8, false },
+    _desiredFont{ L"Consolas", 0, DEFAULT_FONT_WEIGHT, { 0, 14 }, CP_UTF8 },
+    _actualFont{ L"Consolas", 0, DEFAULT_FONT_WEIGHT, { 0, 14 }, CP_UTF8, false },
     _uiaProvider{ nullptr },
     _uiaProviderInitialized{ false },
     _currentDpi{ USER_DEFAULT_SCREEN_DPI },
     _pfnWriteCallback{ nullptr },
     _multiClickTime{ 500 } // this will be overwritten by the windows system double-click time
 {
+    _EnsureStaticInitialization();
+
     HINSTANCE hInstance = wil::GetModuleInstanceHandle();
 
     if (RegisterTermClass(hInstance))
@@ -148,6 +205,11 @@ HwndTerminal::HwndTerminal(HWND parentHwnd) :
     }
 }
 
+HwndTerminal::~HwndTerminal()
+{
+    Teardown();
+}
+
 HRESULT HwndTerminal::Initialize()
 {
     _terminal = std::make_unique<::Microsoft::Terminal::Core::Terminal>();
@@ -162,9 +224,6 @@ HRESULT HwndTerminal::Initialize()
     RETURN_IF_FAILED(dxEngine->Enable());
     _renderer->AddRenderEngine(dxEngine.get());
 
-    const auto pfn = std::bind(&::Microsoft::Console::Render::Renderer::IsGlyphWideByFont, _renderer.get(), std::placeholders::_1);
-    SetGlyphWidthFallback(pfn);
-
     _UpdateFont(USER_DEFAULT_SCREEN_DPI);
     RECT windowRect;
     GetWindowRect(_hwnd.get(), &windowRect);
@@ -181,8 +240,8 @@ HRESULT HwndTerminal::Initialize()
     _terminal->SetBackgroundCallback([](auto) {});
 
     _terminal->Create(COORD{ 80, 25 }, 1000, *_renderer);
-    _terminal->SetDefaultBackground(RGB(5, 27, 80));
-    _terminal->SetDefaultForeground(RGB(255, 255, 255));
+    _terminal->SetDefaultBackground(RGB(12, 12, 12));
+    _terminal->SetDefaultForeground(RGB(204, 204, 204));
     _terminal->SetWriteInputCallback([=](std::wstring & input) noexcept { _WriteTextToConnection(input); });
     localPointerToThread->EnablePainting();
 
@@ -191,6 +250,33 @@ HRESULT HwndTerminal::Initialize()
     return S_OK;
 }
 
+void HwndTerminal::Teardown() noexcept
+try
+{
+    // As a rule, detach resources from the Terminal before shutting them down.
+    // This ensures that teardown is reentrant.
+
+    // Shut down the renderer (and therefore the thread) before we implode
+    if (auto localRenderEngine{ std::exchange(_renderEngine, nullptr) })
+    {
+        if (auto localRenderer{ std::exchange(_renderer, nullptr) })
+        {
+            localRenderer->TriggerTeardown();
+            // renderer is destroyed
+        }
+        // renderEngine is destroyed
+    }
+
+    if (auto localHwnd{ _hwnd.release() })
+    {
+        // If we're being called through WM_DESTROY, we won't get here (hwnd is already released)
+        // If we're not, we may end up in Teardown _again_... but by the time we do, all other
+        // resources have been released and will not be released again.
+        DestroyWindow(localHwnd);
+    }
+}
+CATCH_LOG();
+
 void HwndTerminal::RegisterScrollCallback(std::function<void(int, int, int)> callback)
 {
     _terminal->SetScrollPositionChangedCallback(callback);
@@ -467,11 +553,21 @@ try
 }
 CATCH_RETURN();
 
+void HwndTerminal::_ClearSelection() noexcept
+try
+{
+    auto lock{ _terminal->LockForWriting() };
+    _terminal->ClearSelection();
+    _renderer->TriggerSelection();
+}
+CATCH_LOG();
+
 void _stdcall TerminalClearSelection(void* terminal)
 {
-    const auto publicTerminal = static_cast<const HwndTerminal*>(terminal);
-    publicTerminal->_terminal->ClearSelection();
+    auto publicTerminal = static_cast<HwndTerminal*>(terminal);
+    publicTerminal->_ClearSelection();
 }
+
 bool _stdcall TerminalIsSelectionActive(void* terminal)
 {
     const auto publicTerminal = static_cast<const HwndTerminal*>(terminal);
@@ -482,9 +578,10 @@ bool _stdcall TerminalIsSelectionActive(void* terminal)
 // Returns the selected text in the terminal.
 const wchar_t* _stdcall TerminalGetSelection(void* terminal)
 {
-    const auto publicTerminal = static_cast<const HwndTerminal*>(terminal);
+    auto publicTerminal = static_cast<HwndTerminal*>(terminal);
 
     const auto bufferData = publicTerminal->_terminal->RetrieveSelectedTextFromBuffer(false);
+    publicTerminal->_ClearSelection();
 
     // convert text: vector<string> --> string
     std::wstring selectedText;
@@ -494,8 +591,6 @@ const wchar_t* _stdcall TerminalGetSelection(void* terminal)
     }
 
     auto returnText = wil::make_cotaskmem_string_nothrow(selectedText.c_str());
-    TerminalClearSelection(terminal);
-
     return returnText.release();
 }
 
@@ -541,19 +636,30 @@ bool HwndTerminal::_CanSendVTMouseInput() const noexcept
 bool HwndTerminal::_SendMouseEvent(UINT uMsg, WPARAM wParam, LPARAM lParam) noexcept
 try
 {
-    const til::point cursorPosition{
+    til::point cursorPosition{
         GET_X_LPARAM(lParam),
         GET_Y_LPARAM(lParam),
     };
 
     const til::size fontSize{ this->_actualFont.GetSize() };
     short wheelDelta{ 0 };
-    if (uMsg == WM_MOUSEWHEEL)
+    if (uMsg == WM_MOUSEWHEEL || uMsg == WM_MOUSEHWHEEL)
     {
         wheelDelta = HIWORD(wParam);
+
+        // If it's a *WHEEL event, it's in screen coordinates, not window (?!)
+        POINT coordsToTransform = cursorPosition;
+        ScreenToClient(_hwnd.get(), &coordsToTransform);
+        cursorPosition = coordsToTransform;
     }
 
-    return _terminal->SendMouseEvent(cursorPosition / fontSize, uMsg, getControlKeyState(), wheelDelta);
+    const TerminalInput::MouseButtonState state{
+        WI_IsFlagSet(GetKeyState(VK_LBUTTON), KeyPressed),
+        WI_IsFlagSet(GetKeyState(VK_MBUTTON), KeyPressed),
+        WI_IsFlagSet(GetKeyState(VK_RBUTTON), KeyPressed)
+    };
+
+    return _terminal->SendMouseEvent(cursorPosition / fontSize, uMsg, getControlKeyState(), wheelDelta, state);
 }
 catch (...)
 {
@@ -561,20 +667,24 @@ catch (...)
     return false;
 }
 
-void HwndTerminal::_SendKeyEvent(WORD vkey, WORD scanCode, bool keyDown) noexcept
+void HwndTerminal::_SendKeyEvent(WORD vkey, WORD scanCode, WORD flags, bool keyDown) noexcept
 try
 {
-    const auto flags = getControlKeyState();
-    _terminal->SendKeyEvent(vkey, scanCode, flags, keyDown);
+    auto modifiers = getControlKeyState();
+    if (WI_IsFlagSet(flags, ENHANCED_KEY))
+    {
+        modifiers |= ControlKeyStates::EnhancedKey;
+    }
+    _terminal->SendKeyEvent(vkey, scanCode, modifiers, keyDown);
 }
 CATCH_LOG();
 
-void HwndTerminal::_SendCharEvent(wchar_t ch, WORD scanCode) noexcept
+void HwndTerminal::_SendCharEvent(wchar_t ch, WORD scanCode, WORD flags) noexcept
 try
 {
     if (_terminal->IsSelectionActive())
     {
-        _terminal->ClearSelection();
+        _ClearSelection();
         if (ch == UNICODE_ESC)
         {
             // ESC should clear any selection before it triggers input.
@@ -589,21 +699,25 @@ try
         return;
     }
 
-    const auto flags = getControlKeyState();
-    _terminal->SendCharEvent(ch, scanCode, flags);
+    auto modifiers = getControlKeyState();
+    if (WI_IsFlagSet(flags, ENHANCED_KEY))
+    {
+        modifiers |= ControlKeyStates::EnhancedKey;
+    }
+    _terminal->SendCharEvent(ch, scanCode, modifiers);
 }
 CATCH_LOG();
 
-void _stdcall TerminalSendKeyEvent(void* terminal, WORD vkey, WORD scanCode, bool keyDown)
+void _stdcall TerminalSendKeyEvent(void* terminal, WORD vkey, WORD scanCode, WORD flags, bool keyDown)
 {
     const auto publicTerminal = static_cast<HwndTerminal*>(terminal);
-    publicTerminal->_SendKeyEvent(vkey, scanCode, keyDown);
+    publicTerminal->_SendKeyEvent(vkey, scanCode, flags, keyDown);
 }
 
-void _stdcall TerminalSendCharEvent(void* terminal, wchar_t ch, WORD scanCode)
+void _stdcall TerminalSendCharEvent(void* terminal, wchar_t ch, WORD scanCode, WORD flags)
 {
     const auto publicTerminal = static_cast<HwndTerminal*>(terminal);
-    publicTerminal->_SendCharEvent(ch, scanCode);
+    publicTerminal->_SendCharEvent(ch, scanCode, flags);
 }
 
 void _stdcall DestroyTerminal(void* terminal)
@@ -621,6 +735,7 @@ void _stdcall TerminalSetTheme(void* terminal, TerminalTheme theme, LPCWSTR font
 
         publicTerminal->_terminal->SetDefaultForeground(theme.DefaultForeground);
         publicTerminal->_terminal->SetDefaultBackground(theme.DefaultBackground);
+        publicTerminal->_renderEngine->SetSelectionBackground(theme.DefaultSelectionBackground, theme.SelectionBackgroundAlpha);
 
         // Set the font colors
         for (size_t tableIndex = 0; tableIndex < 16; tableIndex++)
@@ -632,7 +747,7 @@ void _stdcall TerminalSetTheme(void* terminal, TerminalTheme theme, LPCWSTR font
 
     publicTerminal->_terminal->SetCursorStyle(theme.CursorStyle);
 
-    publicTerminal->_desiredFont = { fontFamily, 0, 10, { 0, fontSize }, CP_UTF8 };
+    publicTerminal->_desiredFont = { fontFamily, 0, DEFAULT_FONT_WEIGHT, { 0, fontSize }, CP_UTF8 };
     publicTerminal->_UpdateFont(newDpi);
 
     // When the font changes the terminal dimensions need to be recalculated since the available row and column

src/cascadia/PublicTerminalCore/HwndTerminal.hpp

@@ -12,10 +12,13 @@
 
 using namespace Microsoft::Console::VirtualTerminal;
 
+// Keep in sync with TerminalTheme.cs
 typedef struct _TerminalTheme
 {
     COLORREF DefaultBackground;
     COLORREF DefaultForeground;
+    COLORREF DefaultSelectionBackground;
+    float SelectionBackgroundAlpha;
     DispatchTypes::CursorStyle CursorStyle;
     COLORREF ColorTable[16];
 } TerminalTheme, *LPTerminalTheme;
@@ -34,8 +37,8 @@ __declspec(dllexport) bool _stdcall TerminalIsSelectionActive(void* terminal);
 __declspec(dllexport) void _stdcall DestroyTerminal(void* terminal);
 __declspec(dllexport) void _stdcall TerminalSetTheme(void* terminal, TerminalTheme theme, LPCWSTR fontFamily, short fontSize, int newDpi);
 __declspec(dllexport) void _stdcall TerminalRegisterWriteCallback(void* terminal, const void __stdcall callback(wchar_t*));
-__declspec(dllexport) void _stdcall TerminalSendKeyEvent(void* terminal, WORD vkey, WORD scanCode, bool keyDown);
-__declspec(dllexport) void _stdcall TerminalSendCharEvent(void* terminal, wchar_t ch, WORD scanCode);
+__declspec(dllexport) void _stdcall TerminalSendKeyEvent(void* terminal, WORD vkey, WORD scanCode, WORD flags, bool keyDown);
+__declspec(dllexport) void _stdcall TerminalSendCharEvent(void* terminal, wchar_t ch, WORD flags, WORD scanCode);
 __declspec(dllexport) void _stdcall TerminalBlinkCursor(void* terminal);
 __declspec(dllexport) void _stdcall TerminalSetCursorVisible(void* terminal, const bool visible);
 __declspec(dllexport) void _stdcall TerminalSetFocus(void* terminal);
@@ -51,9 +54,10 @@ public:
     HwndTerminal(HwndTerminal&&) = default;
     HwndTerminal& operator=(const HwndTerminal&) = default;
     HwndTerminal& operator=(HwndTerminal&&) = default;
-    ~HwndTerminal() = default;
+    ~HwndTerminal();
 
     HRESULT Initialize();
+    void Teardown() noexcept;
     void SendOutput(std::wstring_view data);
     HRESULT Refresh(const SIZE windowSize, _Out_ COORD* dimensions);
     void RegisterScrollCallback(std::function<void(int, int, int)> callback);
@@ -92,8 +96,8 @@ private:
     friend void _stdcall TerminalClearSelection(void* terminal);
     friend const wchar_t* _stdcall TerminalGetSelection(void* terminal);
     friend bool _stdcall TerminalIsSelectionActive(void* terminal);
-    friend void _stdcall TerminalSendKeyEvent(void* terminal, WORD vkey, WORD scanCode, bool keyDown);
-    friend void _stdcall TerminalSendCharEvent(void* terminal, wchar_t ch, WORD scanCode);
+    friend void _stdcall TerminalSendKeyEvent(void* terminal, WORD vkey, WORD scanCode, WORD flags, bool keyDown);
+    friend void _stdcall TerminalSendCharEvent(void* terminal, wchar_t ch, WORD scanCode, WORD flags);
     friend void _stdcall TerminalSetTheme(void* terminal, TerminalTheme theme, LPCWSTR fontFamily, short fontSize, int newDpi);
     friend void _stdcall TerminalBlinkCursor(void* terminal);
     friend void _stdcall TerminalSetCursorVisible(void* terminal, const bool visible);
@@ -112,11 +116,13 @@ private:
     HRESULT _MoveSelection(LPARAM lParam) noexcept;
     IRawElementProviderSimple* _GetUiaProvider() noexcept;
 
+    void _ClearSelection() noexcept;
+
     bool _CanSendVTMouseInput() const noexcept;
     bool _SendMouseEvent(UINT uMsg, WPARAM wParam, LPARAM lParam) noexcept;
 
-    void _SendKeyEvent(WORD vkey, WORD scanCode, bool keyDown) noexcept;
-    void _SendCharEvent(wchar_t ch, WORD scanCode) noexcept;
+    void _SendKeyEvent(WORD vkey, WORD scanCode, WORD flags, bool keyDown) noexcept;
+    void _SendCharEvent(wchar_t ch, WORD scanCode, WORD flags) noexcept;
 
     // Inherited via IControlAccessibilityInfo
     COORD GetFontSize() const override;

src/cascadia/TerminalApp/AppLogic.cpp

@@ -911,7 +911,7 @@ namespace winrt::TerminalApp::implementation
     // - Implements the Alt handler (per GH#6421)
     // Return value:
     // - whether the key was handled
-    bool AppLogic::OnDirectKeyEvent(const uint32_t vkey, const bool down)
+    bool AppLogic::OnDirectKeyEvent(const uint32_t vkey, const uint8_t scanCode, const bool down)
     {
         if (_root)
         {
@@ -922,7 +922,7 @@ namespace winrt::TerminalApp::implementation
             {
                 if (auto keyListener{ focusedObject.try_as<IDirectKeyListener>() })
                 {
-                    if (keyListener.OnDirectKeyEvent(vkey, down))
+                    if (keyListener.OnDirectKeyEvent(vkey, scanCode, down))
                     {
                         return true;
                     }

src/cascadia/TerminalApp/AppLogic.h

@@ -48,7 +48,7 @@ namespace winrt::TerminalApp::implementation
 
         hstring Title();
         void TitlebarClicked();
-        bool OnDirectKeyEvent(const uint32_t vkey, const bool down);
+        bool OnDirectKeyEvent(const uint32_t vkey, const uint8_t scanCode, const bool down);
 
         void WindowCloseButtonClicked();
 

src/cascadia/TerminalApp/CascadiaSettings.cpp

@@ -226,9 +226,12 @@ void CascadiaSettings::_ValidateProfilesHaveGuid()
 void CascadiaSettings::_ResolveDefaultProfile()
 {
     const auto unparsedDefaultProfile{ GlobalSettings().UnparsedDefaultProfile() };
-    auto maybeParsedDefaultProfile{ _GetProfileGuidByName(unparsedDefaultProfile) };
-    auto defaultProfileGuid{ Utils::CoalesceOptionals(maybeParsedDefaultProfile, GUID{}) };
-    GlobalSettings().DefaultProfile(defaultProfileGuid);
+    if (unparsedDefaultProfile)
+    {
+        auto maybeParsedDefaultProfile{ _GetProfileGuidByName(*unparsedDefaultProfile) };
+        auto defaultProfileGuid{ Utils::CoalesceOptionals(maybeParsedDefaultProfile, GUID{}) };
+        GlobalSettings().DefaultProfile(defaultProfileGuid);
+    }
 }
 
 // Method Description:

src/cascadia/TerminalApp/CascadiaSettingsSerialization.cpp

@@ -61,7 +61,7 @@ std::unique_ptr<CascadiaSettings> CascadiaSettings::LoadAll()
     // GH 3588, we need this below to know if the user chose something that wasn't our default.
     // Collect it up here in case it gets modified by any of the other layers between now and when
     // the user's preferences are loaded and layered.
-    const auto hardcodedDefaultGuid = resultPtr->GlobalSettings().UnparsedDefaultProfile();
+    const auto hardcodedDefaultGuid = resultPtr->GlobalSettings().DefaultProfile();
 
     std::optional<std::string> fileData = _ReadUserSettings();
     const bool foundFile = fileData.has_value();
@@ -141,12 +141,11 @@ std::unique_ptr<CascadiaSettings> CascadiaSettings::LoadAll()
     // is a lot of computation we can skip if no one cares.
     if (TraceLoggingProviderEnabled(g_hTerminalAppProvider, 0, MICROSOFT_KEYWORD_MEASURES))
     {
-        const auto hardcodedDefaultGuidAsGuid = Utils::GuidFromString(hardcodedDefaultGuid);
         const auto guid = resultPtr->GlobalSettings().DefaultProfile();
 
         // Compare to the defaults.json one that we set on install.
         // If it's different, log what the user chose.
-        if (hardcodedDefaultGuidAsGuid != guid)
+        if (hardcodedDefaultGuid != guid)
         {
             TraceLoggingWrite(
                 g_hTerminalAppProvider, // handle to TerminalApp tracelogging provider
@@ -229,6 +228,7 @@ std::unique_ptr<CascadiaSettings> CascadiaSettings::LoadDefaults()
     // them from a file (and the potential that could fail)
     resultPtr->_ParseJsonString(DefaultJson, true);
     resultPtr->LayerJson(resultPtr->_defaultSettings);
+    resultPtr->_ResolveDefaultProfile();
 
     return resultPtr;
 }

src/cascadia/TerminalApp/ColorPickupFlyout.xaml

@@ -114,11 +114,11 @@
                 </StackPanel.Resources>
                 <Button Padding="5"
                     Click="ClearColorButton_Click"
-                    x:Name="ClearColorButton" x:Uid="TabColorClearButton" Content="Reset">
+                    x:Name="ClearColorButton" x:Uid="TabColorClearButton" CornerRadius="2" Content="Reset">
                 </Button>
                 <Button Padding="5"
                     Click="ShowColorPickerButton_Click"
-                    x:Name="CustomColorButton" x:Uid="TabColorCustomButton" Content="Custom...">
+                    x:Name="CustomColorButton" x:Uid="TabColorCustomButton" CornerRadius="2" Content="Custom...">
                 </Button>
             </StackPanel>
         </StackPanel>

src/cascadia/TerminalApp/CommandPalette.cpp

@@ -187,14 +187,16 @@ namespace winrt::TerminalApp::implementation
         {
             const auto actionAndArgs = command.Action();
             _dispatch.DoAction(actionAndArgs);
-            _close();
 
             TraceLoggingWrite(
                 g_hTerminalAppProvider, // handle to TerminalApp tracelogging provider
                 "CommandPaletteDispatchedAction",
                 TraceLoggingDescription("Event emitted when the user selects an action in the Command Palette"),
+                TraceLoggingUInt32(_searchBox().Text().size(), "SearchTextLength", "Number of characters in the search string"),
                 TraceLoggingKeyword(MICROSOFT_KEYWORD_MEASURES),
                 TelemetryPrivacyDataTag(PDT_ProductAndServicePerformance));
+
+            _close();
         }
     }
 

src/cascadia/TerminalApp/GlobalAppSettings.cpp

@@ -17,7 +17,7 @@ using namespace ::Microsoft::Console;
 using namespace winrt::Microsoft::UI::Xaml::Controls;
 
 static constexpr std::string_view LegacyKeybindingsKey{ "keybindings" };
-static constexpr std::string_view BindingsKey{ "bindings" };
+static constexpr std::string_view ActionsKey{ "actions" };
 static constexpr std::string_view DefaultProfileKey{ "defaultProfile" };
 static constexpr std::string_view AlwaysShowTabsKey{ "alwaysShowTabs" };
 static constexpr std::string_view InitialRowsKey{ "initialRows" };
@@ -105,9 +105,9 @@ GUID GlobalAppSettings::DefaultProfile() const
     return _defaultProfile;
 }
 
-std::wstring GlobalAppSettings::UnparsedDefaultProfile() const
+std::optional<std::wstring> GlobalAppSettings::UnparsedDefaultProfile() const
 {
-    return _unparsedDefaultProfile.value();
+    return _unparsedDefaultProfile;
 }
 
 AppKeyBindings GlobalAppSettings::GetKeybindings() const noexcept
@@ -233,7 +233,7 @@ void GlobalAppSettings::LayerJson(const Json::Value& json)
         }
     };
     parseBindings(LegacyKeybindingsKey);
-    parseBindings(BindingsKey);
+    parseBindings(ActionsKey);
 }
 
 // Method Description:

src/cascadia/TerminalApp/GlobalAppSettings.h

@@ -61,7 +61,7 @@ public:
     // by higher layers in the app.
     void DefaultProfile(const GUID defaultProfile) noexcept;
     GUID DefaultProfile() const;
-    std::wstring UnparsedDefaultProfile() const;
+    std::optional<std::wstring> UnparsedDefaultProfile() const;
 
     GETSET_PROPERTY(int32_t, InitialRows); // default value set in constructor
     GETSET_PROPERTY(int32_t, InitialCols); // default value set in constructor

src/cascadia/TerminalApp/IDirectKeyListener.idl

@@ -8,7 +8,7 @@ namespace TerminalApp
     // If you update this one, please update the one in TerminalControl\TermControl.idl
     // If you change this interface, please update the guid.
     // If you press F7 or Alt and get a runtime error, go make sure both copies are the same.
-    [uuid("339e1a87-5315-4da6-96f0-565549b6472b")] interface IDirectKeyListener {
-        Boolean OnDirectKeyEvent(UInt32 vkey, Boolean down);
+    [uuid("0ddf4edc-3fda-4dee-97ca-a417ee3dd510")] interface IDirectKeyListener {
+        Boolean OnDirectKeyEvent(UInt32 vkey, UInt8 scanCode, Boolean down);
     }
 }

src/cascadia/TerminalApp/KeyChordSerialization.cpp

@@ -14,11 +14,13 @@ static constexpr int MAX_CHORD_PARTS = 4;
 
 // clang-format off
 static const std::unordered_map<std::wstring_view, int32_t> vkeyNamePairs {
+    { L"app"             , VK_APPS },
     { L"backspace"       , VK_BACK },
     { L"tab"             , VK_TAB },
     { L"enter"           , VK_RETURN },
     { L"esc"             , VK_ESCAPE },
     { L"escape"          , VK_ESCAPE },
+    { L"menu"            , VK_APPS },
     { L"space"           , VK_SPACE },
     { L"pgup"            , VK_PRIOR },
     { L"pageup"          , VK_PRIOR },

src/cascadia/TerminalApp/TerminalPage.cpp

@@ -166,7 +166,28 @@ namespace winrt::TerminalApp::implementation
         _newTabButton.Click([weakThis{ get_weak() }](auto&&, auto&&) {
             if (auto page{ weakThis.get() })
             {
-                page->_OpenNewTab(nullptr);
+                // if alt is pressed, open a pane
+                const CoreWindow window = CoreWindow::GetForCurrentThread();
+                const auto rAltState = window.GetKeyState(VirtualKey::RightMenu);
+                const auto lAltState = window.GetKeyState(VirtualKey::LeftMenu);
+                const bool altPressed = WI_IsFlagSet(lAltState, CoreVirtualKeyStates::Down) ||
+                                        WI_IsFlagSet(rAltState, CoreVirtualKeyStates::Down);
+
+                // Check for DebugTap
+                bool debugTap = page->_settings->GlobalSettings().DebugFeaturesEnabled() &&
+                                WI_IsFlagSet(lAltState, CoreVirtualKeyStates::Down) &&
+                                WI_IsFlagSet(rAltState, CoreVirtualKeyStates::Down);
+
+                if (altPressed && !debugTap)
+                {
+                    page->_SplitPane(TerminalApp::SplitState::Automatic,
+                                     TerminalApp::SplitType::Manual,
+                                     nullptr);
+                }
+                else
+                {
+                    page->_OpenNewTab(nullptr);
+                }
             }
         });
         _tabView.SelectionChanged({ this, &TerminalPage::_OnTabSelectionChanged });
@@ -384,25 +405,22 @@ namespace winrt::TerminalApp::implementation
             const auto& profile = _settings->GetProfiles()[profileIndex];
             auto profileMenuItem = WUX::Controls::MenuFlyoutItem{};
 
-            // add the keyboard shortcuts for the first 9 profiles
-            if (profileIndex < 9)
-            {
-                // Look for a keychord that is bound to the equivalent
-                // NewTab(ProfileIndex=N) action
-                auto actionAndArgs = winrt::make_self<winrt::TerminalApp::implementation::ActionAndArgs>();
-                actionAndArgs->Action(ShortcutAction::NewTab);
-                auto newTabArgs = winrt::make_self<winrt::TerminalApp::implementation::NewTabArgs>();
-                auto newTerminalArgs = winrt::make_self<winrt::TerminalApp::implementation::NewTerminalArgs>();
-                newTerminalArgs->ProfileIndex(profileIndex);
-                newTabArgs->TerminalArgs(*newTerminalArgs);
-                actionAndArgs->Args(*newTabArgs);
-                auto profileKeyChord{ keyBindings.GetKeyBindingForActionWithArgs(*actionAndArgs) };
+            // Add the keyboard shortcuts based on the number of profiles defined
+            // Look for a keychord that is bound to the equivalent
+            // NewTab(ProfileIndex=N) action
+            auto actionAndArgs = winrt::make_self<winrt::TerminalApp::implementation::ActionAndArgs>();
+            actionAndArgs->Action(ShortcutAction::NewTab);
+            auto newTabArgs = winrt::make_self<winrt::TerminalApp::implementation::NewTabArgs>();
+            auto newTerminalArgs = winrt::make_self<winrt::TerminalApp::implementation::NewTerminalArgs>();
+            newTerminalArgs->ProfileIndex(profileIndex);
+            newTabArgs->TerminalArgs(*newTerminalArgs);
+            actionAndArgs->Args(*newTabArgs);
+            auto profileKeyChord{ keyBindings.GetKeyBindingForActionWithArgs(*actionAndArgs) };
 
-                // make sure we find one to display
-                if (profileKeyChord)
-                {
-                    _SetAcceleratorForMenuItem(profileMenuItem, profileKeyChord);
-                }
+            // make sure we find one to display
+            if (profileKeyChord)
+            {
+                _SetAcceleratorForMenuItem(profileMenuItem, profileKeyChord);
             }
 
             auto profileName = profile.GetName();
@@ -1778,7 +1796,7 @@ namespace winrt::TerminalApp::implementation
                 tab->SetFocused(true);
 
                 // Raise an event that our title changed
-                _titleChangeHandlers(*this, Title());
+                _titleChangeHandlers(*this, tab->GetActiveTitle());
 
                 // Raise an event that our titlebar color changed
                 std::optional<Windows::UI::Color> color = tab->GetTabColor();

src/cascadia/TerminalApp/defaults-universal.json

@@ -72,7 +72,7 @@
             "brightWhite": "#FFFFFF"
         }
     ],
-    "keybindings":
+    "actions":
     [
         // Application-level Keys
         { "command": "closeWindow", "keys": "alt+f4" },

src/cascadia/TerminalApp/defaults.json

@@ -187,7 +187,7 @@
             "foreground": "#839496",
             "background": "#002B36",
             "cursorColor": "#FFFFFF",
-            "black": "#073642",
+            "black": "#002B36",
             "red": "#DC322F",
             "green": "#859900",
             "yellow": "#B58900",
@@ -195,7 +195,7 @@
             "purple": "#D33682",
             "cyan": "#2AA198",
             "white": "#EEE8D5",
-            "brightBlack": "#002B36",
+            "brightBlack": "#073642",
             "brightRed": "#CB4B16",
             "brightGreen": "#586E75",
             "brightYellow": "#657B83",
@@ -209,7 +209,7 @@
             "foreground": "#657B83",
             "background": "#FDF6E3",
             "cursorColor": "#002B36",
-            "black": "#073642",
+            "black": "#002B36",
             "red": "#DC322F",
             "green": "#859900",
             "yellow": "#B58900",
@@ -217,7 +217,7 @@
             "purple": "#D33682",
             "cyan": "#2AA198",
             "white": "#EEE8D5",
-            "brightBlack": "#002B36",
+            "brightBlack": "#073642",
             "brightRed": "#CB4B16",
             "brightGreen": "#586E75",
             "brightYellow": "#657B83",
@@ -271,7 +271,7 @@
             "brightWhite": "#EEEEEC"
         }
     ],
-    "bindings":
+    "actions":
     [
         // Application-level Keys
         { "command": "closeWindow", "keys": "alt+f4" },

src/cascadia/TerminalConnection/init.cpp

@@ -28,6 +28,8 @@ BOOL WINAPI DllMain(HINSTANCE hInstDll, DWORD reason, LPVOID /*reserved*/)
             TraceLoggingUnregister(g_hTerminalConnectionProvider);
         }
         break;
+    default:
+        break;
     }
 
     return TRUE;

src/cascadia/TerminalControl/IMouseWheelListener.idl

@@ -11,6 +11,6 @@ namespace Microsoft.Terminal.TerminalControl
     [uuid("65b8b8c5-988f-43ff-aba9-e89368da1598")]
     interface IMouseWheelListener
     {
-        Boolean OnMouseWheel(Windows.Foundation.Point coord, Int32 delta);
+        Boolean OnMouseWheel(Windows.Foundation.Point coord, Int32 delta, Boolean leftButtonDown, Boolean midButtonDown, Boolean rightButtonDown);
     }
 }

src/cascadia/TerminalControl/TermControl.cpp

@@ -16,6 +16,7 @@
 #include "TermControlAutomationPeer.h"
 
 using namespace ::Microsoft::Console::Types;
+using namespace ::Microsoft::Console::VirtualTerminal;
 using namespace ::Microsoft::Terminal::Core;
 using namespace winrt::Windows::UI::Xaml;
 using namespace winrt::Windows::UI::Xaml::Input;
@@ -737,7 +738,11 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
 
         const auto ch = e.Character();
         const auto scanCode = gsl::narrow_cast<WORD>(e.KeyStatus().ScanCode);
-        const auto modifiers = _GetPressedModifierKeys();
+        auto modifiers = _GetPressedModifierKeys();
+        if (e.KeyStatus().IsExtendedKey)
+        {
+            modifiers |= ControlKeyStates::EnhancedKey;
+        }
         const bool handled = _terminal->SendCharEvent(ch, scanCode, modifiers);
         e.Handled(handled);
     }
@@ -747,7 +752,7 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
     //   normally. Namely, the keys we're concerned with are F7 down and Alt up.
     // Return value:
     // - Whether the key was handled.
-    bool TermControl::OnDirectKeyEvent(const uint32_t vkey, const bool down)
+    bool TermControl::OnDirectKeyEvent(const uint32_t vkey, const uint8_t scanCode, const bool down)
     {
         const auto modifiers{ _GetPressedModifierKeys() };
         auto handled = false;
@@ -755,9 +760,7 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
         {
             // Manually generate an Alt KeyUp event into the key bindings or terminal.
             //   This is required as part of GH#6421.
-            // GH#6513 - make sure to set the scancode too, otherwise conpty
-            // will think this is a NUL
-            (void)_TrySendKeyEvent(VK_MENU, LOWORD(MapVirtualKeyW(VK_MENU, MAPVK_VK_TO_VSC)), modifiers, false);
+            (void)_TrySendKeyEvent(VK_MENU, scanCode, modifiers, false);
             handled = true;
         }
         else if (vkey == VK_F7 && down)
@@ -779,7 +782,7 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
             if (!handled)
             {
                 // _TrySendKeyEvent pretends it didn't handle F7 for some unknown reason.
-                (void)_TrySendKeyEvent(VK_F7, 0, modifiers, true);
+                (void)_TrySendKeyEvent(VK_F7, scanCode, modifiers, true);
                 // GH#6438: Note that we're _not_ sending the key up here - that'll
                 // get passed through XAML to our KeyUp handler normally.
                 handled = true;
@@ -826,9 +829,13 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
             return;
         }
 
-        const auto modifiers = _GetPressedModifierKeys();
+        auto modifiers = _GetPressedModifierKeys();
         const auto vkey = gsl::narrow_cast<WORD>(e.OriginalKey());
         const auto scanCode = gsl::narrow_cast<WORD>(e.KeyStatus().ScanCode);
+        if (e.KeyStatus().IsExtendedKey)
+        {
+            modifiers |= ControlKeyStates::EnhancedKey;
+        }
 
         // Alt-Numpad# input will send us a character once the user releases
         // Alt, so we should be ignoring the individual keydowns. The character
@@ -1001,7 +1008,8 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
         }
 
         const auto modifiers = _GetPressedModifierKeys();
-        return _terminal->SendMouseEvent(terminalPosition, uiButton, modifiers, sWheelDelta);
+        const TerminalInput::MouseButtonState state{ props.IsLeftButtonPressed(), props.IsMiddleButtonPressed(), props.IsRightButtonPressed() };
+        return _terminal->SendMouseEvent(terminalPosition, uiButton, modifiers, sWheelDelta, state);
     }
 
     // Method Description:
@@ -1325,10 +1333,12 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
         }
 
         const auto point = args.GetCurrentPoint(*this);
+        const auto props = point.Properties();
+        const TerminalInput::MouseButtonState state{ props.IsLeftButtonPressed(), props.IsMiddleButtonPressed(), props.IsRightButtonPressed() };
         auto result = _DoMouseWheel(point.Position(),
                                     ControlKeyStates{ args.KeyModifiers() },
                                     point.Properties().MouseWheelDelta(),
-                                    point.Properties().IsLeftButtonPressed());
+                                    state);
         if (result)
         {
             args.Handled(true);
@@ -1351,7 +1361,7 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
     bool TermControl::_DoMouseWheel(const Windows::Foundation::Point point,
                                     const ControlKeyStates modifiers,
                                     const int32_t delta,
-                                    const bool isLeftButtonPressed)
+                                    const TerminalInput::MouseButtonState state)
     {
         if (_CanSendVTMouseInput())
         {
@@ -1363,7 +1373,8 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
             return _terminal->SendMouseEvent(_GetTerminalPosition(point),
                                              WM_MOUSEWHEEL,
                                              _GetPressedModifierKeys(),
-                                             ::base::saturated_cast<short>(delta));
+                                             ::base::saturated_cast<short>(delta),
+                                             state);
         }
 
         const auto ctrlPressed = modifiers.IsCtrlPressed();
@@ -1379,7 +1390,7 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
         }
         else
         {
-            _MouseScrollHandler(delta, point, isLeftButtonPressed);
+            _MouseScrollHandler(delta, point, state.isLeftButtonDown);
         }
         return false;
     }
@@ -1393,11 +1404,16 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
     // - location: the location of the mouse during this event. This location is
     //   relative to the origin of the control
     // - delta: the mouse wheel delta that triggered this event.
+    // - state: the state for each of the mouse buttons individually (pressed/unpressed)
     bool TermControl::OnMouseWheel(const Windows::Foundation::Point location,
-                                   const int32_t delta)
+                                   const int32_t delta,
+                                   const bool leftButtonDown,
+                                   const bool midButtonDown,
+                                   const bool rightButtonDown)
     {
         const auto modifiers = _GetPressedModifierKeys();
-        return _DoMouseWheel(location, modifiers, delta, false);
+        TerminalInput::MouseButtonState state{ leftButtonDown, midButtonDown, rightButtonDown };
+        return _DoMouseWheel(location, modifiers, delta, state);
     }
 
     // Method Description:

src/cascadia/TerminalControl/TermControl.h

@@ -17,6 +17,11 @@
 #include "SearchBoxControl.h"
 #include "ThrottledFunc.h"
 
+namespace Microsoft::Console::VirtualTerminal
+{
+    struct MouseButtonState;
+}
+
 namespace winrt::Microsoft::Terminal::TerminalControl::implementation
 {
     struct CopyToClipboardEventArgs :
@@ -87,9 +92,9 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
 
         void CreateSearchBoxControl();
 
-        bool OnDirectKeyEvent(const uint32_t vkey, const bool down);
+        bool OnDirectKeyEvent(const uint32_t vkey, const uint8_t scanCode, const bool down);
 
-        bool OnMouseWheel(const Windows::Foundation::Point location, const int32_t delta);
+        bool OnMouseWheel(const Windows::Foundation::Point location, const int32_t delta, const bool leftButtonDown, const bool midButtonDown, const bool rightButtonDown);
 
         ~TermControl();
 
@@ -221,7 +226,7 @@ namespace winrt::Microsoft::Terminal::TerminalControl::implementation
         void _MouseScrollHandler(const double mouseDelta, const Windows::Foundation::Point point, const bool isLeftButtonPressed);
         void _MouseZoomHandler(const double delta);
         void _MouseTransparencyHandler(const double delta);
-        bool _DoMouseWheel(const Windows::Foundation::Point point, const ::Microsoft::Terminal::Core::ControlKeyStates modifiers, const int32_t delta, const bool isLeftButtonPressed);
+        bool _DoMouseWheel(const Windows::Foundation::Point point, const ::Microsoft::Terminal::Core::ControlKeyStates modifiers, const int32_t delta, const ::Microsoft::Console::VirtualTerminal::TerminalInput::MouseButtonState state);
 
         bool _CapturePointer(Windows::Foundation::IInspectable const& sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs const& e);
         bool _ReleasePointerCapture(Windows::Foundation::IInspectable const& sender, Windows::UI::Xaml::Input::PointerRoutedEventArgs const& e);

src/cascadia/TerminalControl/TermControl.idl

@@ -14,8 +14,8 @@ namespace Microsoft.Terminal.TerminalControl
     // If you update this one, please update TerminalApp\IDirectKeyListener.idl.
     // If you change this interface, please update the guid.
     // If you press F7 or Alt and get a runtime error, go make sure both copies are the same.
-    [uuid("339e1a87-5315-4da6-96f0-565549b6472b")] interface IDirectKeyListener {
-        Boolean OnDirectKeyEvent(UInt32 vkey, Boolean down);
+    [uuid("0ddf4edc-3fda-4dee-97ca-a417ee3dd510")] interface IDirectKeyListener {
+        Boolean OnDirectKeyEvent(UInt32 vkey, UInt8 scanCode, Boolean down);
     }
 
     runtimeclass CopyToClipboardEventArgs

src/cascadia/TerminalCore/ITerminalApi.hpp

@@ -39,6 +39,7 @@ namespace Microsoft::Terminal::Core
         virtual bool SetColorTableEntry(const size_t tableIndex, const DWORD color) noexcept = 0;
 
         virtual bool SetCursorStyle(const ::Microsoft::Console::VirtualTerminal::DispatchTypes::CursorStyle cursorStyle) noexcept = 0;
+        virtual bool SetCursorColor(const DWORD color) noexcept = 0;
 
         virtual bool SetDefaultForeground(const DWORD color) noexcept = 0;
         virtual bool SetDefaultBackground(const DWORD color) noexcept = 0;

src/cascadia/TerminalCore/ITerminalInput.hpp

@@ -17,7 +17,7 @@ namespace Microsoft::Terminal::Core
         ITerminalInput& operator=(ITerminalInput&&) = default;
 
         virtual bool SendKeyEvent(const WORD vkey, const WORD scanCode, const ControlKeyStates states, const bool keyDown) = 0;
-        virtual bool SendMouseEvent(const COORD viewportPos, const unsigned int uiButton, const ControlKeyStates states, const short wheelDelta) = 0;
+        virtual bool SendMouseEvent(const COORD viewportPos, const unsigned int uiButton, const ControlKeyStates states, const short wheelDelta, const Microsoft::Console::VirtualTerminal::TerminalInput::MouseButtonState state) = 0;
         virtual bool SendCharEvent(const wchar_t ch, const WORD scanCode, const ControlKeyStates states) = 0;
 
         // void SendMouseEvent(uint row, uint col, KeyModifiers modifiers);

src/cascadia/TerminalCore/Terminal.cpp

@@ -430,8 +430,20 @@ bool Terminal::SendKeyEvent(const WORD vkey,
 
     _StoreKeyEvent(vkey, scanCode);
 
+    // As a Terminal we're mostly interested in getting key events from physical hardware (mouse & keyboard).
+    // We're thus ignoring events whose values are outside the valid range and unlikely to be generated by the current keyboard.
+    // It's very likely that a proper followup character event will be sent to us.
+    // This prominently happens using AutoHotKey's keyboard remapping feature,
+    // which sends input events whose vkey is 0xff and scanCode is 0.
+    // We need to check for this early, as _CharacterFromKeyEvent() always returns 0 for such invalid values,
+    // making us believe that this is an actual non-character input, while it usually isn't.
+    // GH#7064
+    if (vkey == 0 || vkey >= 0xff || scanCode == 0)
+    {
+        return false;
+    }
+
     const auto isAltOnlyPressed = states.IsAltPressed() && !states.IsCtrlPressed();
-    const auto isSuppressedAltGrAlias = !_altGrAliasing && states.IsAltPressed() && states.IsCtrlPressed();
 
     // DON'T manually handle Alt+Space - the system will use this to bring up
     // the system menu for restore, min/maximize, size, move, close.
@@ -451,6 +463,7 @@ bool Terminal::SendKeyEvent(const WORD vkey,
     // as TerminalInput::HandleKey will then fall back to using the vkey which
     // is the underlying ASCII character (e.g. A-Z) on the keyboard in our case.
     // See GH#5525/GH#6211 for more details
+    const auto isSuppressedAltGrAlias = !_altGrAliasing && states.IsAltPressed() && states.IsCtrlPressed() && !states.IsAltGrPressed();
     const auto ch = isSuppressedAltGrAlias ? UNICODE_NULL : _CharacterFromKeyEvent(vkey, scanCode, states);
 
     // Delegate it to the character event handler if this key event can be
@@ -484,16 +497,16 @@ bool Terminal::SendKeyEvent(const WORD vkey,
 // Return Value:
 // - true if we translated the key event, and it should not be processed any further.
 // - false if we did not translate the key, and it should be processed into a character.
-bool Terminal::SendMouseEvent(const COORD viewportPos, const unsigned int uiButton, const ControlKeyStates states, const short wheelDelta)
+bool Terminal::SendMouseEvent(const COORD viewportPos, const unsigned int uiButton, const ControlKeyStates states, const short wheelDelta, const TerminalInput::MouseButtonState state)
 {
-    // viewportPos must be within the dimensions of the viewport
-    const auto viewportDimensions = _mutableViewport.Dimensions();
-    if (viewportPos.X < 0 || viewportPos.X >= viewportDimensions.X || viewportPos.Y < 0 || viewportPos.Y >= viewportDimensions.Y)
-    {
-        return false;
-    }
-
-    return _terminalInput->HandleMouse(viewportPos, uiButton, GET_KEYSTATE_WPARAM(states.Value()), wheelDelta);
+    // GH#6401: VT applications should be able to receive mouse events from outside the
+    // terminal buffer. This is likely to happen when the user drags the cursor offscreen.
+    // We shouldn't throw away perfectly good events when they're offscreen, so we just
+    // clamp them to be within the range [(0, 0), (W, H)].
+#pragma warning(suppress : 26496) // analysis can't tell we're assigning through a reference below
+    auto clampedPos{ viewportPos };
+    _mutableViewport.ToOrigin().Clamp(clampedPos);
+    return _terminalInput->HandleMouse(clampedPos, uiButton, GET_KEYSTATE_WPARAM(states.Value()), wheelDelta, state);
 }
 
 // Method Description:
@@ -817,8 +830,12 @@ void Terminal::_AdjustCursorPosition(const COORD proposedPosition)
         }
     }
 
-    if (updatedViewport)
+    // If the viewport moved, or we circled the buffer, we might need to update
+    // our _scrollOffset
+    if (updatedViewport || newRows != 0)
     {
+        const auto oldScrollOffset = _scrollOffset;
+
         // scroll if...
         //   - no selection is active
         //   - viewport is already at the bottom
@@ -826,6 +843,18 @@ void Terminal::_AdjustCursorPosition(const COORD proposedPosition)
 
         _scrollOffset = scrollToOutput ? 0 : _scrollOffset + scrollAmount + newRows;
 
+        // Clamp the range to make sure that we don't scroll way off the top of the buffer
+        _scrollOffset = std::clamp(_scrollOffset,
+                                   0,
+                                   _buffer->GetSize().Height() - _mutableViewport.Height());
+
+        // If the new scroll offset is different, then we'll still want to raise a scroll event
+        updatedViewport = updatedViewport || (oldScrollOffset != _scrollOffset);
+    }
+
+    // If the viewport moved, then send a scrolling notification.
+    if (updatedViewport)
+    {
         _NotifyScrollEvent();
     }
 

src/cascadia/TerminalCore/Terminal.hpp

@@ -93,6 +93,7 @@ public:
     bool SetWindowTitle(std::wstring_view title) noexcept override;
     bool SetColorTableEntry(const size_t tableIndex, const COLORREF color) noexcept override;
     bool SetCursorStyle(const ::Microsoft::Console::VirtualTerminal::DispatchTypes::CursorStyle cursorStyle) noexcept override;
+    bool SetCursorColor(const COLORREF color) noexcept override;
     bool SetDefaultForeground(const COLORREF color) noexcept override;
     bool SetDefaultBackground(const COLORREF color) noexcept override;
 
@@ -115,7 +116,7 @@ public:
 #pragma region ITerminalInput
     // These methods are defined in Terminal.cpp
     bool SendKeyEvent(const WORD vkey, const WORD scanCode, const Microsoft::Terminal::Core::ControlKeyStates states, const bool keyDown) override;
-    bool SendMouseEvent(const COORD viewportPos, const unsigned int uiButton, const ControlKeyStates states, const short wheelDelta) override;
+    bool SendMouseEvent(const COORD viewportPos, const unsigned int uiButton, const ControlKeyStates states, const short wheelDelta, const Microsoft::Console::VirtualTerminal::TerminalInput::MouseButtonState state) override;
     bool SendCharEvent(const wchar_t ch, const WORD scanCode, const ControlKeyStates states) override;
 
     [[nodiscard]] HRESULT UserResize(const COORD viewportSize) noexcept override;

src/cascadia/TerminalCore/TerminalApi.cpp

@@ -64,6 +64,14 @@ COORD Terminal::GetCursorPosition() noexcept
     return newPos;
 }
 
+bool Terminal::SetCursorColor(const COLORREF color) noexcept
+try
+{
+    _buffer->GetCursor().SetColor(color);
+    return true;
+}
+CATCH_LOG_RETURN_FALSE()
+
 // Method Description:
 // - Moves the cursor down one line, and possibly also to the leftmost column.
 // Arguments:

src/cascadia/TerminalCore/TerminalDispatch.cpp

@@ -146,6 +146,13 @@ try
 }
 CATCH_LOG_RETURN_FALSE()
 
+bool TerminalDispatch::SetCursorColor(const DWORD color) noexcept
+try
+{
+    return _terminalApi.SetCursorColor(color);
+}
+CATCH_LOG_RETURN_FALSE()
+
 bool TerminalDispatch::SetClipboard(std::wstring_view content) noexcept
 try
 {

src/cascadia/TerminalCore/TerminalDispatch.hpp

@@ -35,6 +35,7 @@ public:
 
     bool SetColorTableEntry(const size_t tableIndex, const DWORD color) noexcept override;
     bool SetCursorStyle(const ::Microsoft::Console::VirtualTerminal::DispatchTypes::CursorStyle cursorStyle) noexcept override;
+    bool SetCursorColor(const DWORD color) noexcept override;
 
     bool SetClipboard(std::wstring_view content) noexcept override;
 

src/cascadia/UnitTests_TerminalCore/InputTest.cpp

@@ -30,6 +30,7 @@ namespace TerminalCoreUnitTests
 
         TEST_METHOD(AltShiftKey);
         TEST_METHOD(AltSpace);
+        TEST_METHOD(InvalidKeyEvent);
 
         void _VerifyExpectedInput(std::wstring& actualInput)
         {
@@ -65,4 +66,14 @@ namespace TerminalCoreUnitTests
         VERIFY_IS_FALSE(term.SendKeyEvent(L' ', 0, ControlKeyStates::LeftAltPressed, false));
         VERIFY_IS_FALSE(term.SendCharEvent(L' ', 0, ControlKeyStates::LeftAltPressed));
     }
+
+    void InputTest::InvalidKeyEvent()
+    {
+        // Certain applications like AutoHotKey and its keyboard remapping feature,
+        // send us key events using SendInput() whose values are outside of the valid range.
+        // We don't want to handle those events as we're probably going to get a proper followup character event.
+        VERIFY_IS_FALSE(term.SendKeyEvent(0, 123, {}, true));
+        VERIFY_IS_FALSE(term.SendKeyEvent(255, 123, {}, true));
+        VERIFY_IS_FALSE(term.SendKeyEvent(123, 0, {}, true));
+    }
 }

src/cascadia/UnitTests_TerminalCore/TerminalBufferTests.cpp

@@ -39,6 +39,8 @@ class TerminalCoreUnitTests::TerminalBufferTests final
     TEST_METHOD(TestWrappingCharByChar);
     TEST_METHOD(TestWrappingALongString);
 
+    TEST_METHOD(DontSnapToOutputTest);
+
     TEST_METHOD_SETUP(MethodSetup)
     {
         // STEP 1: Set up the Terminal
@@ -149,3 +151,85 @@ void TerminalBufferTests::TestWrappingALongString()
 
     TestUtils::VerifyExpectedString(termTb, TestUtils::Test100CharsString, { 0, 0 });
 }
+
+void TerminalBufferTests::DontSnapToOutputTest()
+{
+    auto& termTb = *term->_buffer;
+    auto& termSm = *term->_stateMachine;
+    const auto initialView = term->GetViewport();
+
+    VERIFY_ARE_EQUAL(0, initialView.Top());
+    VERIFY_ARE_EQUAL(TerminalViewHeight, initialView.BottomExclusive());
+    VERIFY_ARE_EQUAL(0, term->_scrollOffset);
+
+    // -1 so that we don't print the last \n
+    for (int i = 0; i < TerminalViewHeight + 8 - 1; i++)
+    {
+        termSm.ProcessString(L"x\n");
+    }
+
+    const auto secondView = term->GetViewport();
+
+    VERIFY_ARE_EQUAL(8, secondView.Top());
+    VERIFY_ARE_EQUAL(TerminalViewHeight + 8, secondView.BottomExclusive());
+    VERIFY_ARE_EQUAL(0, term->_scrollOffset);
+
+    Log::Comment(L"Scroll up one line");
+    term->_scrollOffset = 1;
+
+    const auto thirdView = term->GetViewport();
+    VERIFY_ARE_EQUAL(7, thirdView.Top());
+    VERIFY_ARE_EQUAL(TerminalViewHeight + 7, thirdView.BottomExclusive());
+    VERIFY_ARE_EQUAL(1, term->_scrollOffset);
+
+    Log::Comment(L"Print a few lines, to see that the viewport stays where it was");
+    for (int i = 0; i < 8; i++)
+    {
+        termSm.ProcessString(L"x\n");
+    }
+
+    const auto fourthView = term->GetViewport();
+    VERIFY_ARE_EQUAL(7, fourthView.Top());
+    VERIFY_ARE_EQUAL(TerminalViewHeight + 7, fourthView.BottomExclusive());
+    VERIFY_ARE_EQUAL(1 + 8, term->_scrollOffset);
+
+    Log::Comment(L"Print enough lines to get the buffer just about ready to "
+                 L"circle (on the next newline)");
+    auto viewBottom = term->_mutableViewport.BottomInclusive();
+    do
+    {
+        termSm.ProcessString(L"x\n");
+        viewBottom = term->_mutableViewport.BottomInclusive();
+    } while (viewBottom < termTb.GetSize().BottomInclusive());
+
+    const auto fifthView = term->GetViewport();
+    VERIFY_ARE_EQUAL(7, fifthView.Top());
+    VERIFY_ARE_EQUAL(TerminalViewHeight + 7, fifthView.BottomExclusive());
+    VERIFY_ARE_EQUAL(TerminalHistoryLength - 7, term->_scrollOffset);
+
+    Log::Comment(L"Print 3 more lines, and see that we stick to where the old "
+                 L"rows now are in the buffer (after circling)");
+    for (int i = 0; i < 3; i++)
+    {
+        termSm.ProcessString(L"x\n");
+        Log::Comment(NoThrowString().Format(
+            L"_scrollOffset: %d", term->_scrollOffset));
+    }
+    const auto sixthView = term->GetViewport();
+    VERIFY_ARE_EQUAL(4, sixthView.Top());
+    VERIFY_ARE_EQUAL(TerminalViewHeight + 4, sixthView.BottomExclusive());
+    VERIFY_ARE_EQUAL(TerminalHistoryLength - 4, term->_scrollOffset);
+
+    Log::Comment(L"Print 8 more lines, and see that we're now just stuck at the"
+                 L"top of the buffer");
+    for (int i = 0; i < 8; i++)
+    {
+        termSm.ProcessString(L"x\n");
+        Log::Comment(NoThrowString().Format(
+            L"_scrollOffset: %d", term->_scrollOffset));
+    }
+    const auto seventhView = term->GetViewport();
+    VERIFY_ARE_EQUAL(0, seventhView.Top());
+    VERIFY_ARE_EQUAL(TerminalViewHeight, seventhView.BottomExclusive());
+    VERIFY_ARE_EQUAL(TerminalHistoryLength, term->_scrollOffset);
+}

src/cascadia/WindowsTerminal/AppHost.cpp

@@ -17,6 +17,10 @@ using namespace winrt::Windows::Foundation::Numerics;
 using namespace ::Microsoft::Console;
 using namespace ::Microsoft::Console::Types;
 
+// This magic flag is "documented" at https://msdn.microsoft.com/en-us/library/windows/desktop/ms646301(v=vs.85).aspx
+// "If the high-order bit is 1, the key is down; otherwise, it is up."
+static constexpr short KeyPressed{ gsl::narrow_cast<short>(0x8000) };
+
 AppHost::AppHost() noexcept :
     _app{},
     _logic{ nullptr }, // don't make one, we're going to take a ref on app's
@@ -64,11 +68,11 @@ AppHost::~AppHost()
     _app = nullptr;
 }
 
-bool AppHost::OnDirectKeyEvent(const uint32_t vkey, const bool down)
+bool AppHost::OnDirectKeyEvent(const uint32_t vkey, const uint8_t scanCode, const bool down)
 {
     if (_logic)
     {
-        return _logic.OnDirectKeyEvent(vkey, down);
+        return _logic.OnDirectKeyEvent(vkey, scanCode, down);
     }
     return false;
 }
@@ -405,7 +409,11 @@ void AppHost::_WindowMouseWheeled(const til::point coord, const int32_t delta)
 
                     const til::point offsetPoint = coord - controlOrigin;
 
-                    if (control.OnMouseWheel(offsetPoint, delta))
+                    const auto lButtonDown = WI_IsFlagSet(GetKeyState(VK_LBUTTON), KeyPressed);
+                    const auto mButtonDown = WI_IsFlagSet(GetKeyState(VK_MBUTTON), KeyPressed);
+                    const auto rButtonDown = WI_IsFlagSet(GetKeyState(VK_RBUTTON), KeyPressed);
+
+                    if (control.OnMouseWheel(offsetPoint, delta, lButtonDown, mButtonDown, rButtonDown))
                     {
                         // If the element handled the mouse wheel event, don't
                         // continue to iterate over the remaining controls.

src/cascadia/WindowsTerminal/AppHost.h

@@ -17,7 +17,7 @@ public:
     void AppTitleChanged(const winrt::Windows::Foundation::IInspectable& sender, winrt::hstring newTitle);
     void LastTabClosed(const winrt::Windows::Foundation::IInspectable& sender, const winrt::TerminalApp::LastTabClosedEventArgs& args);
     void Initialize();
-    bool OnDirectKeyEvent(const uint32_t vkey, const bool down);
+    bool OnDirectKeyEvent(const uint32_t vkey, const uint8_t scanCode, const bool down);
 
 private:
     bool _useNonClientArea;

src/cascadia/WindowsTerminal/main.cpp

@@ -141,7 +141,7 @@ int __stdcall wWinMain(HINSTANCE, HINSTANCE, LPWSTR, int)
         // been handled we can discard the message before we even translate it.
         if (_messageIsF7Keypress(message))
         {
-            if (host.OnDirectKeyEvent(VK_F7, true))
+            if (host.OnDirectKeyEvent(VK_F7, LOBYTE(HIWORD(message.lParam)), true))
             {
                 // The application consumed the F7. Don't let Xaml get it.
                 continue;
@@ -154,7 +154,7 @@ int __stdcall wWinMain(HINSTANCE, HINSTANCE, LPWSTR, int)
         if (_messageIsAltKeyup(message))
         {
             // Let's pass <Alt> to the application
-            if (host.OnDirectKeyEvent(VK_MENU, false))
+            if (host.OnDirectKeyEvent(VK_MENU, LOBYTE(HIWORD(message.lParam)), false))
             {
                 // The application consumed the Alt. Don't let Xaml get it.
                 continue;

src/cascadia/WpfTerminalControl/NativeMethods.cs

@@ -62,6 +62,16 @@ namespace Microsoft.Terminal.Wpf
             /// </summary>
             WM_CHAR = 0x0102,
 
+            /// <summary>
+            /// The WM_SYSKEYDOWN message is posted to the window with the keyboard focus when a system key is pressed. A system key is F10 or Alt+Something.
+            /// </summary>
+            WM_SYSKEYDOWN = 0x0104,
+
+            /// <summary>
+            /// The WM_SYSKEYDOWN message is posted to the window with the keyboard focus when a system key is released. A system key is F10 or Alt+Something.
+            /// </summary>
+            WM_SYSKEYUP = 0x0105,
+
             /// <summary>
             /// The WM_MOUSEMOVE message is posted to a window when the cursor moves. If the mouse is not captured, the message is posted to the window that contains the cursor. Otherwise, the message is posted to the window that has captured the mouse.
             /// </summary>
@@ -215,10 +225,10 @@ namespace Microsoft.Terminal.Wpf
         public static extern void DestroyTerminal(IntPtr terminal);
 
         [DllImport("PublicTerminalCore.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall)]
-        public static extern void TerminalSendKeyEvent(IntPtr terminal, ushort vkey, ushort scanCode, bool keyDown);
+        public static extern void TerminalSendKeyEvent(IntPtr terminal, ushort vkey, ushort scanCode, ushort flags, bool keyDown);
 
         [DllImport("PublicTerminalCore.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall)]
-        public static extern void TerminalSendCharEvent(IntPtr terminal, char ch, ushort scanCode);
+        public static extern void TerminalSendCharEvent(IntPtr terminal, char ch, ushort scanCode, ushort flags);
 
         [DllImport("PublicTerminalCore.dll", CharSet = CharSet.Unicode, CallingConvention = CallingConvention.StdCall)]
         public static extern void TerminalSetTheme(IntPtr terminal, [MarshalAs(UnmanagedType.Struct)] TerminalTheme theme, string fontFamily, short fontSize, int newDpi);

src/cascadia/WpfTerminalControl/TerminalContainer.cs

@@ -20,6 +20,20 @@ namespace Microsoft.Terminal.Wpf
     /// </remarks>
     public class TerminalContainer : HwndHost
     {
+        private static void UnpackKeyMessage(IntPtr wParam, IntPtr lParam, out ushort vkey, out ushort scanCode, out ushort flags)
+        {
+            ulong scanCodeAndFlags = (((ulong)lParam) & 0xFFFF0000) >> 16;
+            scanCode = (ushort)(scanCodeAndFlags & 0x00FFu);
+            flags = (ushort)(scanCodeAndFlags & 0xFF00u);
+            vkey = (ushort)wParam;
+        }
+
+        private static void UnpackCharMessage(IntPtr wParam, IntPtr lParam, out char character, out ushort scanCode, out ushort flags)
+        {
+            UnpackKeyMessage(wParam, lParam, out ushort vKey, out scanCode, out flags);
+            character = (char)vKey;
+        }
+
         private ITerminalConnection connection;
         private IntPtr hwnd;
         private IntPtr terminal;
@@ -124,6 +138,20 @@ namespace Microsoft.Terminal.Wpf
             this.TriggerResize(this.RenderSize);
         }
 
+        /// <summary>
+        /// Gets the selected text from the terminal renderer and clears the selection.
+        /// </summary>
+        /// <returns>The selected text, empty if no text is selected.</returns>
+        internal string GetSelectedText()
+        {
+            if (NativeMethods.TerminalIsSelectionActive(this.terminal))
+            {
+                return NativeMethods.TerminalGetSelection(this.terminal);
+            }
+
+            return string.Empty;
+        }
+
         /// <summary>
         /// Triggers a refresh of the terminal with the given size.
         /// </summary>
@@ -235,29 +263,35 @@ namespace Microsoft.Terminal.Wpf
                         this.Focus();
                         NativeMethods.SetFocus(this.hwnd);
                         break;
+                    case NativeMethods.WindowMessage.WM_SYSKEYDOWN: // fallthrough
                     case NativeMethods.WindowMessage.WM_KEYDOWN:
                         {
                             // WM_KEYDOWN lParam layout documentation: https://docs.microsoft.com/en-us/windows/win32/inputdev/wm-keydown
                             NativeMethods.TerminalSetCursorVisible(this.terminal, true);
-                            ulong scanCode = (((ulong)lParam) & 0x00FF0000) >> 16;
 
-                            NativeMethods.TerminalSendKeyEvent(this.terminal, (ushort)wParam, (ushort)scanCode, true);
+                            UnpackKeyMessage(wParam, lParam, out ushort vkey, out ushort scanCode, out ushort flags);
+                            NativeMethods.TerminalSendKeyEvent(this.terminal, vkey, scanCode, flags, true);
                             this.blinkTimer?.Start();
                             break;
                         }
 
+                    case NativeMethods.WindowMessage.WM_SYSKEYUP: // fallthrough
                     case NativeMethods.WindowMessage.WM_KEYUP:
                         {
                             // WM_KEYUP lParam layout documentation: https://docs.microsoft.com/en-us/windows/win32/inputdev/wm-keyup
-                            ulong scanCode = (((ulong)lParam) & 0x00FF0000) >> 16;
-                            NativeMethods.TerminalSendKeyEvent(this.terminal, (ushort)wParam, (ushort)scanCode, false);
+                            UnpackKeyMessage(wParam, lParam, out ushort vkey, out ushort scanCode, out ushort flags);
+                            NativeMethods.TerminalSendKeyEvent(this.terminal, (ushort)wParam, scanCode, flags, false);
                             break;
                         }
 
                     case NativeMethods.WindowMessage.WM_CHAR:
-                        // WM_CHAR lParam layout documentation: https://docs.microsoft.com/en-us/windows/win32/inputdev/wm-char
-                        NativeMethods.TerminalSendCharEvent(this.terminal, (char)wParam, (ushort)((uint)lParam >> 16));
-                        break;
+                        {
+                            // WM_CHAR lParam layout documentation: https://docs.microsoft.com/en-us/windows/win32/inputdev/wm-char
+                            UnpackCharMessage(wParam, lParam, out char character, out ushort scanCode, out ushort flags);
+                            NativeMethods.TerminalSendCharEvent(this.terminal, character, scanCode, flags);
+                            break;
+                        }
+
                     case NativeMethods.WindowMessage.WM_WINDOWPOSCHANGED:
                         var windowpos = (NativeMethods.WINDOWPOS)Marshal.PtrToStructure(lParam, typeof(NativeMethods.WINDOWPOS));
                         if (((NativeMethods.SetWindowPosFlags)windowpos.flags).HasFlag(NativeMethods.SetWindowPosFlags.SWP_NOSIZE))

src/cascadia/WpfTerminalControl/TerminalControl.xaml.cs

@@ -70,6 +70,15 @@ namespace Microsoft.Terminal.Wpf
             this.termContainer.SetTheme(theme, fontFamily, fontSize);
         }
 
+        /// <summary>
+        /// Gets the selected text in the terminal, clearing the selection. Otherwise returns an empty string.
+        /// </summary>
+        /// <returns>Selected text, empty string if no content is selected.</returns>
+        public string GetSelectedText()
+        {
+            return this.termContainer.GetSelectedText();
+        }
+
         /// <summary>
         /// Resizes the terminal to the specified rows and columns.
         /// </summary>

src/cascadia/WpfTerminalControl/TerminalTheme.cs

@@ -52,7 +52,7 @@ namespace Microsoft.Terminal.Wpf
     /// <summary>
     /// Structure for color handling in the terminal.
     /// </summary>
-    /// <remarks>Pack = 1 removes the padding added by some compilers/processors for optimization purposes.</remarks>
+    /// <remarks>Keep in sync with HwndTerminal.hpp.</remarks>
     [StructLayout(LayoutKind.Sequential)]
     public struct TerminalTheme
     {
@@ -66,6 +66,16 @@ namespace Microsoft.Terminal.Wpf
         /// </summary>
         public uint DefaultForeground;
 
+        /// <summary>
+        /// The default selection background color of the terminal, represented in Win32 COLORREF format.
+        /// </summary>
+        public uint DefaultSelectionBackground;
+
+        /// <summary>
+        /// The opacity alpha for the selection color of the terminal, must be between 1.0 and 0.0.
+        /// </summary>
+        public float SelectionBackgroundAlpha;
+
         /// <summary>
         /// The style of cursor to use in the terminal.
         /// </summary>

src/common.build.post.props

@@ -54,7 +54,7 @@
   <Target Name="CleanUpPrecompForSmallCIAgents"
           DependsOnTargets="_ComputePrecompToCleanUp"
           AfterTargets="AfterBuild"
-          Condition="'$(AGENT_ID)' != ''">
+          Condition="'$(AGENT_ID)' != '' and !$(ProjectName.Contains('TerminalApp'))">
     <!-- We just need to keep *TerminalApp*'s PCHs because they get rebuilt more often. -->
     <Delete Files="@(_PCHFileToCleanWithTimestamp)"/>
     <Touch Files="@(_PCHFileToCleanWithTimestamp)" Time="%(LastWriteTime)" AlwaysCreate="true" />

src/cppwinrt.build.pre.props

@@ -22,12 +22,20 @@
        at the winmd we build to generate type info.
        In general, cppwinrt projects all want this.
   -->
-  <PropertyGroup Condition="'$(OpenConsoleUniversalApp)'!='false'">
+  <PropertyGroup Condition="'$(OpenConsoleUniversalApp)'=='true'">
     <MinimalCoreWin>true</MinimalCoreWin>
     <AppContainerApplication>true</AppContainerApplication>
     <WindowsStoreApp>true</WindowsStoreApp>
     <ApplicationType>Windows Store</ApplicationType>
   </PropertyGroup>
+  <PropertyGroup Condition="'$(OpenConsoleUniversalApp)'!='true'">
+    <!-- Some of our projects include the cppwinrt build options to
+         just build cppwinrt things, but don't want the store bits
+         in full swing. MinimalCoreWin != false means "don't let me
+         use win32 APIs"
+    -->
+    <MinimalCoreWin>false</MinimalCoreWin>
+  </PropertyGroup>
 
   <!-- This is magic that tells msbuild to link against the Desktop platform
        instead of the App platform. This you definitely want, because we're not

src/inc/til/bitmap.h

@@ -315,7 +315,7 @@ namespace til // Terminal Implementation Library. Also: "Today I Learned"
 
                 // Copy any regions that overlap from this map to the new one.
                 // Just iterate our runs...
-                for (const auto run : *this)
+                for (const auto& run : *this)
                 {
                     // intersect them with the new map
                     // so we don't attempt to set bits that fit outside

src/interactivity/win32/windowio.cpp

@@ -23,12 +23,17 @@
 #pragma hdrstop
 
 using namespace Microsoft::Console::Interactivity::Win32;
+using namespace Microsoft::Console::VirtualTerminal;
 using Microsoft::Console::Interactivity::ServiceLocator;
 // For usage with WM_SYSKEYDOWN message processing.
 // See https://msdn.microsoft.com/en-us/library/windows/desktop/ms646286(v=vs.85).aspx
 // Bit 29 is whether ALT was held when the message was posted.
 #define WM_SYSKEYDOWN_ALT_PRESSED (0x20000000)
 
+// This magic flag is "documented" at https://msdn.microsoft.com/en-us/library/windows/desktop/ms646301(v=vs.85).aspx
+// "If the high-order bit is 1, the key is down; otherwise, it is up."
+static constexpr short KeyPressed{ gsl::narrow_cast<short>(0x8000) };
+
 // ----------------------------
 // Helpers
 // ----------------------------
@@ -123,7 +128,20 @@ bool HandleTerminalMouseEvent(const COORD cMousePosition,
     // Virtual terminal input mode
     if (IsInVirtualTerminalInputMode())
     {
-        fWasHandled = gci.GetActiveInputBuffer()->GetTerminalInput().HandleMouse(cMousePosition, uiButton, sModifierKeystate, sWheelDelta);
+        const TerminalInput::MouseButtonState state{
+            WI_IsFlagSet(GetKeyState(VK_LBUTTON), KeyPressed),
+            WI_IsFlagSet(GetKeyState(VK_MBUTTON), KeyPressed),
+            WI_IsFlagSet(GetKeyState(VK_RBUTTON), KeyPressed)
+        };
+
+        // GH#6401: VT applications should be able to receive mouse events from outside the
+        // terminal buffer. This is likely to happen when the user drags the cursor offscreen.
+        // We shouldn't throw away perfectly good events when they're offscreen, so we just
+        // clamp them to be within the range [(0, 0), (W, H)].
+        auto clampedPosition{ cMousePosition };
+        const auto clampViewport{ gci.GetActiveOutputBuffer().GetViewport().ToOrigin() };
+        clampViewport.Clamp(clampedPosition);
+        fWasHandled = gci.GetActiveInputBuffer()->GetTerminalInput().HandleMouse(clampedPosition, uiButton, sModifierKeystate, sWheelDelta, state);
     }
 
     return fWasHandled;
@@ -635,6 +653,25 @@ BOOL HandleMouseEvent(const SCREEN_INFORMATION& ScreenInfo,
 
         if (HandleTerminalMouseEvent(MousePosition, Message, GET_KEYSTATE_WPARAM(wParam), sDelta))
         {
+            // GH#6401: Capturing the mouse ensures that we get drag/release events
+            // even if the user moves outside the window.
+            // HandleTerminalMouseEvent returns false if the terminal's not in VT mode,
+            // so capturing/releasing here should not impact other console mouse event
+            // consumers.
+            switch (Message)
+            {
+            case WM_LBUTTONDOWN:
+            case WM_MBUTTONDOWN:
+            case WM_RBUTTONDOWN:
+                SetCapture(ServiceLocator::LocateConsoleWindow()->GetWindowHandle());
+                break;
+            case WM_LBUTTONUP:
+            case WM_MBUTTONUP:
+            case WM_RBUTTONUP:
+                ReleaseCapture();
+                break;
+            }
+
             return FALSE;
         }
     }

src/renderer/dx/CustomTextLayout.cpp

@@ -847,57 +847,113 @@ CATCH_RETURN();
         auto mutableOrigin = origin;
 
         // Draw each run separately.
-        for (UINT32 runIndex = 0; runIndex < _runs.size(); ++runIndex)
+        for (INT32 runIndex = 0; runIndex < gsl::narrow<INT32>(_runs.size()); ++runIndex)
         {
             // Get the run
             const Run& run = _runs.at(runIndex);
 
-            // Prepare the glyph run and description objects by converting our
-            // internal storage representation into something that matches DWrite's structures.
-            DWRITE_GLYPH_RUN glyphRun;
-            glyphRun.bidiLevel = run.bidiLevel;
-            glyphRun.fontEmSize = _format->GetFontSize() * run.fontScale;
-            glyphRun.fontFace = run.fontFace.Get();
-            glyphRun.glyphAdvances = &_glyphAdvances.at(run.glyphStart);
-            glyphRun.glyphCount = run.glyphCount;
-            glyphRun.glyphIndices = &_glyphIndices.at(run.glyphStart);
-            glyphRun.glyphOffsets = &_glyphOffsets.at(run.glyphStart);
-            glyphRun.isSideways = false;
-
-            DWRITE_GLYPH_RUN_DESCRIPTION glyphRunDescription;
-            glyphRunDescription.clusterMap = _glyphClusters.data();
-            glyphRunDescription.localeName = _localeName.data();
-            glyphRunDescription.string = _text.data();
-            glyphRunDescription.stringLength = run.textLength;
-            glyphRunDescription.textPosition = run.textStart;
-
-            // Calculate the origin for the next run based on the amount of space
-            // that would be consumed. We are doing this calculation now, not after,
-            // because if the text is RTL then we need to advance immediately, before the
-            // write call since DirectX expects the origin to the RIGHT of the text for RTL.
-            const auto postOriginX = std::accumulate(_glyphAdvances.begin() + run.glyphStart,
-                                                     _glyphAdvances.begin() + run.glyphStart + run.glyphCount,
-                                                     mutableOrigin.x);
-
-            // Check for RTL, if it is, apply space adjustment.
-            if (WI_IsFlagSet(glyphRun.bidiLevel, 1))
+            if (!WI_IsFlagSet(run.bidiLevel, 1))
             {
-                mutableOrigin.x = postOriginX;
+                RETURN_IF_FAILED(_DrawGlyphRun(clientDrawingContext, renderer, mutableOrigin, run));
             }
+            // This is the RTL behavior. We will advance to the last contiguous RTL run, draw that,
+            // and then keep on going backwards from there, and then move runIndex beyond.
+            // Let's say we have runs abcdEFGh, where runs EFG are RTL.
+            // Then we will draw them in the order abcdGFEh
+            else
+            {
+                const INT32 originalRunIndex = runIndex;
+                INT32 lastIndexRTL = runIndex;
 
-            // Try to draw it
-            RETURN_IF_FAILED(renderer->DrawGlyphRun(clientDrawingContext,
-                                                    mutableOrigin.x,
-                                                    mutableOrigin.y,
-                                                    DWRITE_MEASURING_MODE_NATURAL,
-                                                    &glyphRun,
-                                                    &glyphRunDescription,
-                                                    run.drawingEffect.Get()));
+                // Step 1: Get to the last contiguous RTL run from here
+                while (lastIndexRTL < gsl::narrow<INT32>(_runs.size()) - 1) // only could ever advance if there's something left
+                {
+                    const Run& nextRun = _runs.at(gsl::narrow_cast<size_t>(lastIndexRTL + 1));
+                    if (WI_IsFlagSet(nextRun.bidiLevel, 1))
+                    {
+                        lastIndexRTL++;
+                    }
+                    else
+                    {
+                        break;
+                    }
+                }
 
-            // Either way, we should be at this point by the end of writing this sequence,
-            // whether it was LTR or RTL.
+                // Go from the last to the first and draw
+                for (runIndex = lastIndexRTL; runIndex >= originalRunIndex; runIndex--)
+                {
+                    const Run& currentRun = _runs.at(runIndex);
+                    RETURN_IF_FAILED(_DrawGlyphRun(clientDrawingContext, renderer, mutableOrigin, currentRun));
+                }
+                runIndex = lastIndexRTL; // and the for loop will take the increment to the last one
+            }
+        }
+    }
+    CATCH_RETURN();
+    return S_OK;
+}
+
+// Routine Description:
+// - Draw the given run
+// - The origin is updated to be after the run.
+// Arguments:
+// - clientDrawingContext - Optional pointer to information that the renderer might need
+//                          while attempting to graphically place the text onto the screen
+// - renderer - The interface to be used for actually putting text onto the screen
+// - origin - pixel point of top left corner on final surface for drawing
+// - run - the run to be drawn
+[[nodiscard]] HRESULT CustomTextLayout::_DrawGlyphRun(_In_opt_ void* clientDrawingContext,
+                                                      gsl::not_null<IDWriteTextRenderer*> renderer,
+                                                      D2D_POINT_2F& mutableOrigin,
+                                                      const Run& run) noexcept
+{
+    try
+    {
+        // Prepare the glyph run and description objects by converting our
+        // internal storage representation into something that matches DWrite's structures.
+        DWRITE_GLYPH_RUN glyphRun;
+        glyphRun.bidiLevel = run.bidiLevel;
+        glyphRun.fontEmSize = _format->GetFontSize() * run.fontScale;
+        glyphRun.fontFace = run.fontFace.Get();
+        glyphRun.glyphAdvances = &_glyphAdvances.at(run.glyphStart);
+        glyphRun.glyphCount = run.glyphCount;
+        glyphRun.glyphIndices = &_glyphIndices.at(run.glyphStart);
+        glyphRun.glyphOffsets = &_glyphOffsets.at(run.glyphStart);
+        glyphRun.isSideways = false;
+
+        DWRITE_GLYPH_RUN_DESCRIPTION glyphRunDescription;
+        glyphRunDescription.clusterMap = _glyphClusters.data();
+        glyphRunDescription.localeName = _localeName.data();
+        glyphRunDescription.string = _text.data();
+        glyphRunDescription.stringLength = run.textLength;
+        glyphRunDescription.textPosition = run.textStart;
+
+        // Calculate the origin for the next run based on the amount of space
+        // that would be consumed. We are doing this calculation now, not after,
+        // because if the text is RTL then we need to advance immediately, before the
+        // write call since DirectX expects the origin to the RIGHT of the text for RTL.
+        const auto postOriginX = std::accumulate(_glyphAdvances.begin() + run.glyphStart,
+                                                 _glyphAdvances.begin() + run.glyphStart + run.glyphCount,
+                                                 mutableOrigin.x);
+
+        // Check for RTL, if it is, apply space adjustment.
+        if (WI_IsFlagSet(glyphRun.bidiLevel, 1))
+        {
             mutableOrigin.x = postOriginX;
         }
+
+        // Try to draw it
+        RETURN_IF_FAILED(renderer->DrawGlyphRun(clientDrawingContext,
+                                                mutableOrigin.x,
+                                                mutableOrigin.y,
+                                                DWRITE_MEASURING_MODE_NATURAL,
+                                                &glyphRun,
+                                                &glyphRunDescription,
+                                                run.drawingEffect.Get()));
+
+        // Either way, we should be at this point by the end of writing this sequence,
+        // whether it was LTR or RTL.
+        mutableOrigin.x = postOriginX;
     }
     CATCH_RETURN();
     return S_OK;

src/renderer/dx/CustomTextLayout.h

@@ -147,6 +147,10 @@ namespace Microsoft::Console::Render
         [[nodiscard]] HRESULT _DrawGlyphRuns(_In_opt_ void* clientDrawingContext,
                                              IDWriteTextRenderer* renderer,
                                              const D2D_POINT_2F origin) noexcept;
+        [[nodiscard]] HRESULT _DrawGlyphRun(_In_opt_ void* clientDrawingContext,
+                                            gsl::not_null<IDWriteTextRenderer*> renderer,
+                                            D2D_POINT_2F& mutableOrigin,
+                                            const Run& run) noexcept;
 
         [[nodiscard]] static constexpr UINT32 _EstimateGlyphCount(const UINT32 textLength) noexcept;
 

src/renderer/dx/DxRenderer.cpp

@@ -1393,7 +1393,7 @@ try
         // Use a transform by the size of one cell to convert cells-to-pixels
         // as we clear.
         _d2dDeviceContext->SetTransform(D2D1::Matrix3x2F::Scale(_glyphCell));
-        for (const auto rect : _invalidMap.runs())
+        for (const auto& rect : _invalidMap.runs())
         {
             // Use aliased.
             // For graphics reasons, it'll look better because it will ensure that
@@ -2252,12 +2252,12 @@ CATCH_RETURN();
 // - color - GDI Color
 // Return Value:
 // - N/A
-void DxEngine::SetSelectionBackground(const COLORREF color) noexcept
+void DxEngine::SetSelectionBackground(const COLORREF color, const float alpha) noexcept
 {
     _selectionBackground = D2D1::ColorF(GetRValue(color) / 255.0f,
                                         GetGValue(color) / 255.0f,
                                         GetBValue(color) / 255.0f,
-                                        0.5f);
+                                        alpha);
 }
 
 // Routine Description:

src/renderer/dx/DxRenderer.hpp

@@ -114,7 +114,7 @@ namespace Microsoft::Console::Render
 
         float GetScaling() const noexcept;
 
-        void SetSelectionBackground(const COLORREF color) noexcept;
+        void SetSelectionBackground(const COLORREF color, const float alpha = 0.5f) noexcept;
         void SetAntialiasingMode(const D2D1_TEXT_ANTIALIAS_MODE antialiasingMode) noexcept;
         void SetDefaultTextBackgroundOpacity(const float opacity) noexcept;
 

src/terminal/adapter/adaptDispatch.cpp

@@ -1578,6 +1578,9 @@ bool AdaptDispatch::TabClear(const size_t clearType)
     case DispatchTypes::TabClearType::ClearAllColumns:
         success = _ClearAllTabStops();
         break;
+    default:
+        success = false;
+        break;
     }
     return success;
 }
@@ -1695,6 +1698,9 @@ bool AdaptDispatch::DesignateCodingSystem(const wchar_t codingSystem)
             _termOutput.EnableGrTranslation(false);
         }
         break;
+    default:
+        success = false;
+        break;
     }
     return success;
 }

src/terminal/adapter/terminalOutput.cpp

@@ -66,8 +66,9 @@ bool TerminalOutput::Designate94Charset(size_t gsetNumber, const std::pair<wchar
             return _SetTranslationTable(gsetNumber, DecCyrillic);
         case L'5': // Russian NRCS
             return _SetTranslationTable(gsetNumber, RussianNrcs);
+        default:
+            return false;
         }
-        return false;
     case L'"':
         switch (charset.second)
         {
@@ -77,8 +78,9 @@ bool TerminalOutput::Designate94Charset(size_t gsetNumber, const std::pair<wchar
             return _SetTranslationTable(gsetNumber, GreekNrcs);
         case L'4': // DEC Hebrew
             return _SetTranslationTable(gsetNumber, DecHebrew);
+        default:
+            return false;
         }
-        return false;
     case L'%':
         switch (charset.second)
         {
@@ -92,8 +94,9 @@ bool TerminalOutput::Designate94Charset(size_t gsetNumber, const std::pair<wchar
             return _SetTranslationTable(gsetNumber, DecSupplemental);
         case L'6': // Portuguese NRCS
             return _SetTranslationTable(gsetNumber, PortugueseNrcs);
+        default:
+            return false;
         }
-        return false;
     default:
         return false;
     }

src/terminal/adapter/ut_adapter/MouseInputTest.cpp

@@ -292,7 +292,7 @@ public:
 
         bool fExpectedKeyHandled = false;
         s_pwszInputExpected = L"\x0";
-        VERIFY_ARE_EQUAL(fExpectedKeyHandled, mouseInput->HandleMouse({ 0, 0 }, uiButton, sModifierKeystate, sScrollDelta));
+        VERIFY_ARE_EQUAL(fExpectedKeyHandled, mouseInput->HandleMouse({ 0, 0 }, uiButton, sModifierKeystate, sScrollDelta, {}));
 
         mouseInput->EnableDefaultTracking(true);
 
@@ -309,7 +309,8 @@ public:
                              mouseInput->HandleMouse(Coord,
                                                      uiButton,
                                                      sModifierKeystate,
-                                                     sScrollDelta),
+                                                     sScrollDelta,
+                                                     {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
 
@@ -327,7 +328,8 @@ public:
                              mouseInput->HandleMouse(Coord,
                                                      uiButton,
                                                      sModifierKeystate,
-                                                     sScrollDelta),
+                                                     sScrollDelta,
+                                                     {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
 
@@ -345,7 +347,8 @@ public:
                              mouseInput->HandleMouse(Coord,
                                                      uiButton,
                                                      sModifierKeystate,
-                                                     sScrollDelta),
+                                                     sScrollDelta,
+                                                     {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
     }
@@ -371,7 +374,7 @@ public:
 
         bool fExpectedKeyHandled = false;
         s_pwszInputExpected = L"\x0";
-        VERIFY_ARE_EQUAL(fExpectedKeyHandled, mouseInput->HandleMouse({ 0, 0 }, uiButton, sModifierKeystate, sScrollDelta));
+        VERIFY_ARE_EQUAL(fExpectedKeyHandled, mouseInput->HandleMouse({ 0, 0 }, uiButton, sModifierKeystate, sScrollDelta, {}));
 
         mouseInput->SetUtf8ExtendedMode(true);
 
@@ -391,7 +394,8 @@ public:
                              mouseInput->HandleMouse(Coord,
                                                      uiButton,
                                                      sModifierKeystate,
-                                                     sScrollDelta),
+                                                     sScrollDelta,
+                                                     {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
 
@@ -409,7 +413,8 @@ public:
                              mouseInput->HandleMouse(Coord,
                                                      uiButton,
                                                      sModifierKeystate,
-                                                     sScrollDelta),
+                                                     sScrollDelta,
+                                                     {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
 
@@ -427,7 +432,8 @@ public:
                              mouseInput->HandleMouse(Coord,
                                                      uiButton,
                                                      sModifierKeystate,
-                                                     sScrollDelta),
+                                                     sScrollDelta,
+                                                     {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
     }
@@ -453,7 +459,7 @@ public:
 
         bool fExpectedKeyHandled = false;
         s_pwszInputExpected = L"\x0";
-        VERIFY_ARE_EQUAL(fExpectedKeyHandled, mouseInput->HandleMouse({ 0, 0 }, uiButton, sModifierKeystate, sScrollDelta));
+        VERIFY_ARE_EQUAL(fExpectedKeyHandled, mouseInput->HandleMouse({ 0, 0 }, uiButton, sModifierKeystate, sScrollDelta, {}));
 
         mouseInput->SetSGRExtendedMode(true);
 
@@ -471,7 +477,7 @@ public:
 
             // validate translation
             VERIFY_ARE_EQUAL(fExpectedKeyHandled,
-                             mouseInput->HandleMouse(Coord, uiButton, sModifierKeystate, sScrollDelta),
+                             mouseInput->HandleMouse(Coord, uiButton, sModifierKeystate, sScrollDelta, {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
 
@@ -488,7 +494,8 @@ public:
                              mouseInput->HandleMouse(Coord,
                                                      uiButton,
                                                      sModifierKeystate,
-                                                     sScrollDelta),
+                                                     sScrollDelta,
+                                                     {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
 
@@ -506,7 +513,8 @@ public:
                              mouseInput->HandleMouse(Coord,
                                                      uiButton,
                                                      sModifierKeystate,
-                                                     sScrollDelta),
+                                                     sScrollDelta,
+                                                     {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
     }
@@ -532,7 +540,7 @@ public:
 
         bool fExpectedKeyHandled = false;
         s_pwszInputExpected = L"\x0";
-        VERIFY_ARE_EQUAL(fExpectedKeyHandled, mouseInput->HandleMouse({ 0, 0 }, uiButton, sModifierKeystate, sScrollDelta));
+        VERIFY_ARE_EQUAL(fExpectedKeyHandled, mouseInput->HandleMouse({ 0, 0 }, uiButton, sModifierKeystate, sScrollDelta, {}));
 
         // Default Tracking, Default Encoding
         mouseInput->EnableDefaultTracking(true);
@@ -550,7 +558,8 @@ public:
                              mouseInput->HandleMouse(Coord,
                                                      uiButton,
                                                      sModifierKeystate,
-                                                     sScrollDelta),
+                                                     sScrollDelta,
+                                                     {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
 
@@ -570,7 +579,8 @@ public:
                              mouseInput->HandleMouse(Coord,
                                                      uiButton,
                                                      sModifierKeystate,
-                                                     sScrollDelta),
+                                                     sScrollDelta,
+                                                     {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
 
@@ -589,7 +599,8 @@ public:
                              mouseInput->HandleMouse(Coord,
                                                      uiButton,
                                                      sModifierKeystate,
-                                                     sScrollDelta),
+                                                     sScrollDelta,
+                                                     {}),
                              NoThrowString().Format(L"(x,y)=(%d,%d)", Coord.X, Coord.Y));
         }
     }
@@ -606,31 +617,31 @@ public:
 
         Log::Comment(L"Test mouse wheel scrolling up");
         s_pwszInputExpected = L"\x1B[A";
-        VERIFY_IS_TRUE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, WHEEL_DELTA));
+        VERIFY_IS_TRUE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, WHEEL_DELTA, {}));
 
         Log::Comment(L"Test mouse wheel scrolling down");
         s_pwszInputExpected = L"\x1B[B";
-        VERIFY_IS_TRUE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, -WHEEL_DELTA));
+        VERIFY_IS_TRUE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, -WHEEL_DELTA, {}));
 
         Log::Comment(L"Enable cursor keys mode");
         mouseInput->ChangeCursorKeysMode(true);
 
         Log::Comment(L"Test mouse wheel scrolling up");
         s_pwszInputExpected = L"\x1BOA";
-        VERIFY_IS_TRUE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, WHEEL_DELTA));
+        VERIFY_IS_TRUE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, WHEEL_DELTA, {}));
 
         Log::Comment(L"Test mouse wheel scrolling down");
         s_pwszInputExpected = L"\x1BOB";
-        VERIFY_IS_TRUE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, -WHEEL_DELTA));
+        VERIFY_IS_TRUE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, -WHEEL_DELTA, {}));
 
         Log::Comment(L"Confirm no effect when scroll mode is disabled");
         mouseInput->UseAlternateScreenBuffer();
         mouseInput->EnableAlternateScroll(false);
-        VERIFY_IS_FALSE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, WHEEL_DELTA));
+        VERIFY_IS_FALSE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, WHEEL_DELTA, {}));
 
         Log::Comment(L"Confirm no effect when using the main buffer");
         mouseInput->UseMainScreenBuffer();
         mouseInput->EnableAlternateScroll(true);
-        VERIFY_IS_FALSE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, WHEEL_DELTA));
+        VERIFY_IS_FALSE(mouseInput->HandleMouse({ 0, 0 }, WM_MOUSEWHEEL, noModifierKeys, WHEEL_DELTA, {}));
     }
 };

src/terminal/input/mouseInput.cpp

@@ -13,10 +13,6 @@ using namespace Microsoft::Console::VirtualTerminal;
 #endif
 static const int s_MaxDefaultCoordinate = 94;
 
-// This magic flag is "documented" at https://msdn.microsoft.com/en-us/library/windows/desktop/ms646301(v=vs.85).aspx
-// "If the high-order bit is 1, the key is down; otherwise, it is up."
-static constexpr short KeyPressed{ gsl::narrow_cast<short>(0x8000) };
-
 // Alternate scroll sequences
 static constexpr std::wstring_view CursorUpSequence{ L"\x1b[A" };
 static constexpr std::wstring_view CursorDownSequence{ L"\x1b[B" };
@@ -33,7 +29,6 @@ static constexpr std::wstring_view ApplicationDownSequence{ L"\x1bOB" };
 // - true iff button is a button message to translate
 static constexpr bool _isButtonMsg(const unsigned int button) noexcept
 {
-    bool isButton = false;
     switch (button)
     {
     case WM_LBUTTONDBLCLK:
@@ -47,10 +42,10 @@ static constexpr bool _isButtonMsg(const unsigned int button) noexcept
     case WM_MBUTTONDBLCLK:
     case WM_MOUSEWHEEL:
     case WM_MOUSEHWHEEL:
-        isButton = true;
-        break;
+        return true;
+    default:
+        return false;
     }
-    return isButton;
 }
 
 // Routine Description:
@@ -84,7 +79,6 @@ static constexpr bool _isWheelMsg(const unsigned int buttonCode) noexcept
 // - true iff button is a button down event
 static constexpr bool _isButtonDown(const unsigned int button) noexcept
 {
-    bool isButtonDown = false;
     switch (button)
     {
     case WM_LBUTTONDBLCLK:
@@ -95,32 +89,32 @@ static constexpr bool _isButtonDown(const unsigned int button) noexcept
     case WM_MBUTTONDBLCLK:
     case WM_MOUSEWHEEL:
     case WM_MOUSEHWHEEL:
-        isButtonDown = true;
-        break;
+        return true;
+    default:
+        return false;
     }
-    return isButtonDown;
 }
 
 // Routine Description:
 // - Retrieves which mouse button is currently pressed. This is needed because
 //      MOUSEMOVE events do not also tell us if any mouse buttons are pressed during the move.
 // Parameters:
-// <none>
+// - state - the current state of which mouse buttons are pressed
 // Return value:
 // - a button corresponding to any pressed mouse buttons, else WM_LBUTTONUP if none are pressed.
-unsigned int TerminalInput::s_GetPressedButton() noexcept
+constexpr unsigned int TerminalInput::s_GetPressedButton(const MouseButtonState state) noexcept
 {
-    // TODO GH#4869: Have the caller pass the mouse button state into HandleMouse
-    unsigned int button = WM_LBUTTONUP; // Will be treated as a release, or no button pressed.
-    if (WI_IsFlagSet(GetKeyState(VK_LBUTTON), KeyPressed))
+    // Will be treated as a release, or no button pressed.
+    unsigned int button = WM_LBUTTONUP;
+    if (state.isLeftButtonDown)
     {
         button = WM_LBUTTONDOWN;
     }
-    else if (WI_IsFlagSet(GetKeyState(VK_MBUTTON), KeyPressed))
+    else if (state.isMiddleButtonDown)
     {
         button = WM_MBUTTONDOWN;
     }
-    else if (WI_IsFlagSet(GetKeyState(VK_RBUTTON), KeyPressed))
+    else if (state.isRightButtonDown)
     {
         button = WM_RBUTTONDOWN;
     }
@@ -184,6 +178,10 @@ static constexpr int _windowsButtonToXEncoding(const unsigned int button,
     case WM_MOUSEWHEEL:
     case WM_MOUSEHWHEEL:
         xvalue = delta > 0 ? 0x40 : 0x41;
+        break;
+    default:
+        xvalue = 0;
+        break;
     }
     if (isHover)
     {
@@ -239,6 +237,10 @@ static constexpr int _windowsButtonToSGREncoding(const unsigned int button,
     case WM_MOUSEWHEEL:
     case WM_MOUSEHWHEEL:
         xvalue = delta > 0 ? 0x40 : 0x41;
+        break;
+    default:
+        xvalue = 0;
+        break;
     }
     if (isHover)
     {
@@ -298,12 +300,14 @@ bool TerminalInput::IsTrackingMouseInput() const noexcept
 // - button - the message to decode.
 // - modifierKeyState - the modifier keys pressed with this button
 // - delta - the amount that the scroll wheel changed (should be 0 unless button is a WM_MOUSE*WHEEL)
+// - state - the state of the mouse buttons at this moment
 // Return value:
 // - true if the event was handled and we should stop event propagation to the default window handler.
 bool TerminalInput::HandleMouse(const COORD position,
                                 const unsigned int button,
                                 const short modifierKeyState,
-                                const short delta)
+                                const short delta,
+                                const MouseButtonState state)
 {
     if (Utils::Sign(delta) != Utils::Sign(_mouseInputState.accumulatedDelta))
     {
@@ -354,7 +358,7 @@ bool TerminalInput::HandleMouse(const COORD position,
             //      _GetPressedButton will return the first pressed mouse button.
             // If it returns WM_LBUTTONUP, then we can assume that the mouse
             //      moved without a button being pressed.
-            const unsigned int realButton = isHover ? s_GetPressedButton() : button;
+            const unsigned int realButton = isHover ? s_GetPressedButton(state) : button;
 
             // In default mode, only button presses/releases are sent
             // In ButtonEvent mode, changing coord hovers WITH A BUTTON PRESSED

src/terminal/input/terminalInput.cpp

@@ -378,7 +378,7 @@ static bool _searchWithModifier(const KeyEvent& keyEvent, InputSender sender)
                                          { s_modifierKeyMapping.data(), s_modifierKeyMapping.size() });
     if (match)
     {
-        const auto v = match.value();
+        const auto& v = match.value();
         if (!v.sequence.empty())
         {
             std::wstring modified{ v.sequence }; // Make a copy so we can modify it.

src/terminal/input/terminalInput.hpp

@@ -43,10 +43,19 @@ namespace Microsoft::Console::VirtualTerminal
 
 #pragma region MouseInput
         // These methods are defined in mouseInput.cpp
+
+        struct MouseButtonState
+        {
+            bool isLeftButtonDown;
+            bool isMiddleButtonDown;
+            bool isRightButtonDown;
+        };
+
         bool HandleMouse(const COORD position,
                          const unsigned int button,
                          const short modifierKeyState,
-                         const short delta);
+                         const short delta,
+                         const MouseButtonState state);
 
         bool IsTrackingMouseInput() const noexcept;
 #pragma endregion
@@ -136,7 +145,7 @@ namespace Microsoft::Console::VirtualTerminal
         bool _ShouldSendAlternateScroll(const unsigned int button, const short delta) const noexcept;
         bool _SendAlternateScroll(const short delta) const noexcept;
 
-        static unsigned int s_GetPressedButton() noexcept;
+        static constexpr unsigned int s_GetPressedButton(const MouseButtonState state) noexcept;
 #pragma endregion
     };
 }

src/terminal/parser/InputStateMachineEngine.cpp

@@ -408,6 +408,7 @@ bool InputStateMachineEngine::ActionCsiDispatch(const wchar_t wch,
             // even if we failed to parse a portion of this sequence.
             success = _UpdateSGRMouseButtonState(wch, parameters, buttonState, eventFlags) && success;
             success = success && _WriteMouseEvent(col, row, buttonState, modifierState, eventFlags);
+            break;
         }
         default:
             success = false;
@@ -432,6 +433,7 @@ bool InputStateMachineEngine::ActionCsiDispatch(const wchar_t wch,
             success = _GetXYPosition(parameters, row, col);
             break;
         }
+        [[fallthrough]];
     case CsiActionCodes::ArrowUp:
     case CsiActionCodes::ArrowDown:
     case CsiActionCodes::ArrowRight:
@@ -477,7 +479,7 @@ bool InputStateMachineEngine::ActionCsiDispatch(const wchar_t wch,
                 _lookingForDSR = false;
                 break;
             }
-            __fallthrough;
+            [[fallthrough]];
         case CsiActionCodes::Generic:
         case CsiActionCodes::ArrowUp:
         case CsiActionCodes::ArrowDown:
@@ -1364,6 +1366,8 @@ bool InputStateMachineEngine::_GenerateWin32Key(const gsl::span<const size_t> pa
     case 1:
         key.SetVirtualKeyCode(::base::saturated_cast<WORD>(til::at(parameters, 0)));
         break;
+    default:
+        break;
     }
 
     return true;

src/terminal/parser/OutputStateMachineEngine.cpp

@@ -435,6 +435,9 @@ bool OutputStateMachineEngine::_IntermediateScsDispatch(const wchar_t wch,
         success = _dispatch->Designate96Charset(3, charset);
         TermTelemetry::Instance().Log(TermTelemetry::Codes::DesignateG3);
         break;
+    default:
+        success = false;
+        break;
     }
 
     return success;
@@ -806,9 +809,15 @@ bool OutputStateMachineEngine::_IntermediateGreaterThanOrEqualDispatch(const wch
                 success = _dispatch->TertiaryDeviceAttributes();
                 TermTelemetry::Instance().Log(TermTelemetry::Codes::DA3);
                 break;
+            default:
+                success = false;
+                break;
             }
         }
         break;
+    default:
+        success = false;
+        break;
     }
 
     return success;
@@ -1330,6 +1339,9 @@ bool OutputStateMachineEngine::_GetDeviceStatusOperation(const gsl::span<const s
             statusType = DispatchTypes::AnsiStatusType::CPR_CursorPositionReport;
             success = true;
             break;
+        default:
+            success = false;
+            break;
         }
     }
 

src/terminal/parser/base64.cpp

@@ -128,6 +128,8 @@ bool Base64::s_Decode(const std::wstring_view src, std::wstring& dst) noexcept
             dst.push_back(tmp);
             state = 0;
             break;
+        default:
+            break;
         }
 
         iter++;
@@ -154,6 +156,7 @@ bool Base64::s_Decode(const std::wstring_view src, std::wstring& dst) noexcept
                 return false;
             }
             iter++; // Skip the padding character and fallthrough to "single trailing padding character" case.
+            [[fallthrough]];
         case 3:
             while (iter < src.cend())
             {
@@ -163,6 +166,9 @@ bool Base64::s_Decode(const std::wstring_view src, std::wstring& dst) noexcept
                 }
                 iter++;
             }
+            break;
+        default:
+            break;
         }
     }
     else if (state != 0) // When no padding, we must be in state 0.

src/types/UiaTextRangeBase.cpp

@@ -145,7 +145,9 @@ const COORD UiaTextRangeBase::GetEndpoint(TextPatternRangeEndpoint endpoint) con
 // - true if range is degenerate, false otherwise.
 bool UiaTextRangeBase::SetEndpoint(TextPatternRangeEndpoint endpoint, const COORD val) noexcept
 {
-    const auto bufferSize = _getBufferSize();
+    // GH#6402: Get the actual buffer size here, instead of the one
+    //          constrained by the virtual bottom.
+    const auto bufferSize = _pData->GetTextBuffer().GetSize();
     switch (endpoint)
     {
     case TextPatternRangeEndpoint_End:
@@ -284,6 +286,8 @@ IFACEMETHODIMP UiaTextRangeBase::ExpandToEnclosingUnit(_In_ TextUnit unit) noexc
         }
         else
         {
+            // TODO GH#6986: properly handle "end of buffer" as last character
+            // instead of last cell
             // expand to document
             _start = bufferSize.Origin();
             _end = bufferSize.EndExclusive();
@@ -393,7 +397,9 @@ IFACEMETHODIMP UiaTextRangeBase::GetBoundingRectangles(_Outptr_result_maybenull_
         // set of coords.
         std::vector<double> coords;
 
-        const auto bufferSize = _getBufferSize();
+        // GH#6402: Get the actual buffer size here, instead of the one
+        //          constrained by the virtual bottom.
+        const auto bufferSize = _pData->GetTextBuffer().GetSize();
 
         // these viewport vars are converted to the buffer coordinate space
         const auto viewport = bufferSize.ConvertToOrigin(_pData->GetViewport());