Remove dependency on IsGlyphFullWidth for IRM/DECSWL (#16903)

This gets rid off the implicit dependency on `IsGlyphFullWidth`
for the IRM and DECSWL/DECDWL/DECDHL implementations.

## Validation Steps Performed
In pwsh:
* ``"`e[31mab`e[m`b`e[4h`e[32m$('*'*10)`e[m`e[4l"``
  prints a red "a", 10 green "*" and a red "b" ✅
* ``"`e[31mab`e[m`b`e[4h`e[32m$('*'*1000)`e[m`e[4l"``
  prints a red "a" and a couple lines of green "*" ✅
* ``"`e[31mf$('o'*70)`e[m`e#6`e#5"``
  the right half of the row is erased ✅

.github/actions/spelling/expect/expect.txt

@@ -1,3 +1,4 @@
+aaaaabbb
 aabbcc
 ABANDONFONT
 abbcc
@@ -92,6 +93,8 @@ backported
 backstory
 barbaz
 Bazz
+bbb
+bbccb
 BBDM
 bbwe
 bcount

src/buffer/out/Row.cpp

@@ -349,12 +349,6 @@ void ROW::_init() noexcept
 #pragma warning(push)
 }
 
-void ROW::TransferAttributes(const til::small_rle<TextAttribute, uint16_t, 1>& attr, til::CoordType newWidth)
-{
-    _attr = attr;
-    _attr.resize_trailing_extent(gsl::narrow<uint16_t>(newWidth));
-}
-
 void ROW::CopyFrom(const ROW& source)
 {
     _lineRendition = source._lineRendition;
@@ -366,7 +360,8 @@ void ROW::CopyFrom(const ROW& source)
     };
     CopyTextFrom(state);
 
-    TransferAttributes(source.Attributes(), _columnCount);
+    _attr = source.Attributes();
+    _attr.resize_trailing_extent(_columnCount);
 }
 
 // Returns the previous possible cursor position, preceding the given column.

src/buffer/out/Row.hpp

@@ -132,7 +132,6 @@ public:
     til::CoordType GetReadableColumnCount() const noexcept;
 
     void Reset(const TextAttribute& attr) noexcept;
-    void TransferAttributes(const til::small_rle<TextAttribute, uint16_t, 1>& attr, til::CoordType newWidth);
     void CopyFrom(const ROW& source);
 
     til::CoordType NavigateToPrevious(til::CoordType column) const noexcept;

src/buffer/out/textBuffer.cpp

@@ -562,7 +562,7 @@ til::point TextBuffer::NavigateCursor(til::point position, til::CoordType distan
 
 // This function is intended for writing regular "lines" of text as it'll set the wrap flag on the given row.
 // You can continue calling the function on the same row as long as state.columnEnd < state.columnLimit.
-void TextBuffer::Write(til::CoordType row, const TextAttribute& attributes, RowWriteState& state)
+void TextBuffer::Replace(til::CoordType row, const TextAttribute& attributes, RowWriteState& state)
 {
     auto& r = GetMutableRowByOffset(row);
     r.ReplaceText(state);
@@ -570,6 +570,36 @@ void TextBuffer::Write(til::CoordType row, const TextAttribute& attributes, RowW
     TriggerRedraw(Viewport::FromExclusive({ state.columnBeginDirty, row, state.columnEndDirty, row + 1 }));
 }
 
+void TextBuffer::Insert(til::CoordType row, const TextAttribute& attributes, RowWriteState& state)
+{
+    auto& r = GetMutableRowByOffset(row);
+    auto& scratch = GetScratchpadRow();
+
+    scratch.CopyFrom(r);
+
+    r.ReplaceText(state);
+    r.ReplaceAttributes(state.columnBegin, state.columnEnd, attributes);
+
+    // Restore trailing text from our backup in scratch.
+    RowWriteState restoreState{
+        .text = scratch.GetText(state.columnBegin, state.columnLimit),
+        .columnBegin = state.columnEnd,
+        .columnLimit = state.columnLimit,
+    };
+    r.ReplaceText(restoreState);
+
+    // Restore trailing attributes as well.
+    if (const auto copyAmount = restoreState.columnEnd - restoreState.columnBegin; copyAmount > 0)
+    {
+        auto& rowAttr = r.Attributes();
+        const auto& scratchAttr = scratch.Attributes();
+        const auto restoreAttr = scratchAttr.slice(gsl::narrow<uint16_t>(state.columnBegin), gsl::narrow<uint16_t>(state.columnBegin + copyAmount));
+        rowAttr.replace(gsl::narrow<uint16_t>(restoreState.columnBegin), gsl::narrow<uint16_t>(restoreState.columnEnd), restoreAttr);
+    }
+
+    TriggerRedraw(Viewport::FromExclusive({ state.columnBeginDirty, row, restoreState.columnEndDirty, row + 1 }));
+}
+
 // Fills an area of the buffer with a given fill character(s) and attributes.
 void TextBuffer::FillRect(const til::rect& rect, const std::wstring_view& fill, const TextAttribute& attributes)
 {
@@ -1083,11 +1113,8 @@ void TextBuffer::SetCurrentLineRendition(const LineRendition lineRendition, cons
         // And if it's no longer single width, the right half of the row should be erased.
         if (lineRendition != LineRendition::SingleWidth)
         {
-            const auto fillChar = L' ';
             const auto fillOffset = GetLineWidth(rowIndex);
-            const auto fillLength = gsl::narrow<size_t>(GetSize().Width() - fillOffset);
-            const OutputCellIterator fillData{ fillChar, fillAttributes, fillLength };
-            row.WriteCells(fillData, fillOffset, false);
+            FillRect({ fillOffset, rowIndex, til::CoordTypeMax, rowIndex + 1 }, L" ", fillAttributes);
             // We also need to make sure the cursor is clamped within the new width.
             GetCursor().SetPosition(ClampPositionWithinLine(cursorPosition));
         }

src/buffer/out/textBuffer.hpp

@@ -107,7 +107,8 @@ public:
     til::point NavigateCursor(til::point position, til::CoordType distance) const;
 
     // Text insertion functions
-    void Write(til::CoordType row, const TextAttribute& attributes, RowWriteState& state);
+    void Replace(til::CoordType row, const TextAttribute& attributes, RowWriteState& state);
+    void Insert(til::CoordType row, const TextAttribute& attributes, RowWriteState& state);
     void FillRect(const til::rect& rect, const std::wstring_view& fill, const TextAttribute& attributes);
 
     OutputCellIterator Write(const OutputCellIterator givenIt);

src/buffer/out/ut_textbuffer/UTextAdapterTests.cpp

@@ -41,7 +41,7 @@ class UTextAdapterTests
         RowWriteState state{
             .text = L"abc 𝒶𝒷𝒸 abc ネコちゃん",
         };
-        buffer.Write(0, TextAttribute{}, state);
+        buffer.Replace(0, TextAttribute{}, state);
         VERIFY_IS_TRUE(state.text.empty());
 
         static constexpr auto s = [](til::CoordType beg, til::CoordType end) -> til::point_span {

src/host/_stream.cpp

@@ -125,7 +125,7 @@ void _writeCharsLegacyUnprocessed(SCREEN_INFORMATION& screenInfo, const std::wst
         auto cursorPosition = textBuffer.GetCursor().GetPosition();
 
         state.columnBegin = cursorPosition.x;
-        textBuffer.Write(cursorPosition.y, textBuffer.GetCurrentAttributes(), state);
+        textBuffer.Replace(cursorPosition.y, textBuffer.GetCurrentAttributes(), state);
         cursorPosition.x = state.columnEnd;
 
         if (wrapAtEOL && state.columnEnd >= state.columnLimit)

src/host/readDataCooked.cpp

@@ -1192,13 +1192,13 @@ try
         buffer.front() = L'┌';
         buffer.back() = L'┐';
         state.text = buffer;
-        textBuffer.Write(contentRect.top - 1, attributes, state);
+        textBuffer.Replace(contentRect.top - 1, attributes, state);
 
         // bottom line └───┘
         buffer.front() = L'└';
         buffer.back() = L'┘';
         state.text = buffer;
-        textBuffer.Write(contentRect.bottom, attributes, state);
+        textBuffer.Replace(contentRect.bottom, attributes, state);
 
         // middle lines │   │
         buffer.assign(widthSizeT, L' ');
@@ -1207,7 +1207,7 @@ try
         for (til::CoordType y = contentRect.top; y < contentRect.bottom; ++y)
         {
             state.text = buffer;
-            textBuffer.Write(y, attributes, state);
+            textBuffer.Replace(y, attributes, state);
         }
     }
 
@@ -1391,7 +1391,7 @@ void COOKED_READ_DATA::_popupHandleCommandNumberInput(Popup& popup, const wchar_
             .columnBegin = popup.contentRect.right - CommandNumberMaxInputLength,
             .columnLimit = popup.contentRect.right,
         };
-        _screenInfo.GetTextBuffer().Write(popup.contentRect.top, _screenInfo.GetPopupAttributes(), state);
+        _screenInfo.GetTextBuffer().Replace(popup.contentRect.top, _screenInfo.GetPopupAttributes(), state);
     }
 }
 
@@ -1474,7 +1474,7 @@ void COOKED_READ_DATA::_popupDrawPrompt(const Popup& popup, const UINT id) const
         .columnBegin = popup.contentRect.left,
         .columnLimit = popup.contentRect.right,
     };
-    _screenInfo.GetTextBuffer().Write(popup.contentRect.top, _screenInfo.GetPopupAttributes(), state);
+    _screenInfo.GetTextBuffer().Replace(popup.contentRect.top, _screenInfo.GetPopupAttributes(), state);
 }
 
 void COOKED_READ_DATA::_popupDrawCommandList(Popup& popup) const
@@ -1533,7 +1533,7 @@ void COOKED_READ_DATA::_popupDrawCommandList(Popup& popup) const
         buffer.append(width, L' ');
 
         state.text = buffer;
-        _screenInfo.GetTextBuffer().Write(y, attr, state);
+        _screenInfo.GetTextBuffer().Replace(y, attr, state);
     }
 
     cl.dirtyHeight = height;

src/host/ut_host/TextBufferTests.cpp

@@ -147,7 +147,8 @@ class TextBufferTests
 
     TEST_METHOD(TestBurrito);
     TEST_METHOD(TestOverwriteChars);
-    TEST_METHOD(TestRowReplaceText);
+    TEST_METHOD(TestReplace);
+    TEST_METHOD(TestInsert);
 
     TEST_METHOD(TestAppendRTFText);
 
@@ -2005,13 +2006,12 @@ void TextBufferTests::TestOverwriteChars()
 #undef complex1
 }
 
-void TextBufferTests::TestRowReplaceText()
+void TextBufferTests::TestReplace()
 {
     static constexpr til::size bufferSize{ 10, 3 };
     static constexpr UINT cursorSize = 12;
     const TextAttribute attr{ 0x7f };
     TextBuffer buffer{ bufferSize, attr, cursorSize, false, _renderer };
-    auto& row = buffer.GetMutableRowByOffset(0);
 
 #define complex L"\U0001F41B"
 
@@ -2075,17 +2075,98 @@ void TextBufferTests::TestRowReplaceText()
             .columnBegin = t.input.columnBegin,
             .columnLimit = t.input.columnLimit,
         };
-        row.ReplaceText(actual);
+        buffer.Replace(0, attr, actual);
         VERIFY_ARE_EQUAL(t.expected.text, actual.text);
         VERIFY_ARE_EQUAL(t.expected.columnEnd, actual.columnEnd);
         VERIFY_ARE_EQUAL(t.expected.columnBeginDirty, actual.columnBeginDirty);
         VERIFY_ARE_EQUAL(t.expected.columnEndDirty, actual.columnEndDirty);
-        VERIFY_ARE_EQUAL(t.expectedRow, row.GetText());
+        VERIFY_ARE_EQUAL(t.expectedRow, buffer.GetRowByOffset(0).GetText());
     }
 
 #undef complex
 }
 
+void TextBufferTests::TestInsert()
+{
+    static constexpr til::size bufferSize{ 10, 3 };
+    static constexpr UINT cursorSize = 12;
+    static constexpr TextAttribute attr1{ 0x11111111, 0x00000000 };
+    static constexpr TextAttribute attr2{ 0x22222222, 0x00000000 };
+    static constexpr TextAttribute attr3{ 0x33333333, 0x00000000 };
+    TextBuffer buffer{ bufferSize, attr1, cursorSize, false, _renderer };
+
+    struct Test
+    {
+        const wchar_t* description;
+        struct
+        {
+            std::wstring_view text;
+            til::CoordType columnBegin = 0;
+            til::CoordType columnLimit = 0;
+            TextAttribute attr;
+        } input;
+        struct
+        {
+            std::wstring_view text;
+            til::CoordType columnEnd = 0;
+            til::CoordType columnBeginDirty = 0;
+            til::CoordType columnEndDirty = 0;
+        } expected;
+        std::wstring_view expectedRow;
+    };
+
+    static constexpr std::array tests{
+        Test{
+            L"Not enough space -> early exit",
+            { L"aaa", 5, 5, attr1 },
+            { L"aaa", 5, 5, 5 },
+            L"          ",
+        },
+        Test{
+            L"Too much to fit",
+            { L"aaaaabbb", 0, 5, attr1 },
+            { L"bbb", 5, 0, 5 },
+            L"aaaaa     ",
+        },
+        Test{
+            L"Wide char intersects limit",
+            { L"bbbb😄", 0, 5, attr2 },
+            { L"😄", 5, 0, 5 },
+            L"bbbb      ",
+        },
+        Test{
+            L"Insert middle",
+            { L"cc", 2, 5, attr3 },
+            { L"", 4, 2, 4 },
+            L"bbccb     ",
+        },
+    };
+
+    for (const auto& t : tests)
+    {
+        Log::Comment(t.description);
+        RowWriteState actual{
+            .text = t.input.text,
+            .columnBegin = t.input.columnBegin,
+            .columnLimit = t.input.columnLimit,
+        };
+        buffer.Insert(0, t.input.attr, actual);
+        VERIFY_ARE_EQUAL(t.expected.text, actual.text);
+        VERIFY_ARE_EQUAL(t.expected.columnEnd, actual.columnEnd);
+        VERIFY_ARE_EQUAL(t.expected.columnBeginDirty, actual.columnBeginDirty);
+        VERIFY_ARE_EQUAL(t.expected.columnEndDirty, actual.columnEndDirty);
+        VERIFY_ARE_EQUAL(t.expectedRow, buffer.GetRowByOffset(0).GetText());
+    }
+
+    auto& scratch = buffer.GetScratchpadRow();
+    scratch.ReplaceAttributes(0, 5, attr2);
+    scratch.ReplaceAttributes(2, 4, attr3);
+
+    const auto& expectedAttr = scratch.Attributes();
+    const auto& actualAttr = buffer.GetRowByOffset(0).Attributes();
+    VERIFY_ARE_EQUAL(expectedAttr, actualAttr);
+}
+
 void TextBufferTests::TestAppendRTFText()
 {
     {

src/inc/til/rle.h

@@ -1042,18 +1042,6 @@ namespace til // Terminal Implementation Library. Also: "Today I Learned"
 #ifdef __WEX_COMMON_H__
 namespace WEX::TestExecution
 {
-    template<typename T, typename S, typename Container>
-    class VerifyOutputTraits<::til::basic_rle<T, S, Container>>
-    {
-        using rle_vector = ::til::basic_rle<T, S, Container>;
-
-    public:
-        static WEX::Common::NoThrowString ToString(const rle_vector& object)
-        {
-            return WEX::Common::NoThrowString(object.to_string().c_str());
-        }
-    };
-
     template<typename T, typename S, typename Container>
     class VerifyCompareTraits<::til::basic_rle<T, S, Container>, ::til::basic_rle<T, S, Container>>
     {

src/terminal/adapter/adaptDispatch.cpp

@@ -5,7 +5,6 @@
 
 #include "adaptDispatch.hpp"
 #include "../../renderer/base/renderer.hpp"
-#include "../../types/inc/GlyphWidth.hpp"
 #include "../../types/inc/Viewport.hpp"
 #include "../../types/inc/utils.hpp"
 #include "../../inc/unicode.hpp"
@@ -119,26 +118,17 @@ void AdaptDispatch::_WriteToBuffer(const std::wstring_view string)
             }
         }
 
-        if (_modes.test(Mode::InsertReplace))
-        {
-            // If insert-replace mode is enabled, we first measure how many cells
-            // the string will occupy, and scroll the target area right by that
-            // amount to make space for the incoming text.
-            const OutputCellIterator it(state.text, attributes);
-            auto measureIt = it;
-            while (measureIt && measureIt.GetCellDistance(it) < state.columnLimit)
-            {
-                ++measureIt;
-            }
-            const auto row = cursorPosition.y;
-            const auto cellCount = measureIt.GetCellDistance(it);
-            _ScrollRectHorizontally(textBuffer, { cursorPosition.x, row, state.columnLimit, row + 1 }, cellCount);
-        }
-
         state.columnBegin = cursorPosition.x;
 
         const auto textPositionBefore = state.text.data();
-        textBuffer.Write(cursorPosition.y, attributes, state);
+        if (_modes.test(Mode::InsertReplace))
+        {
+            textBuffer.Insert(cursorPosition.y, attributes, state);
+        }
+        else
+        {
+            textBuffer.Replace(cursorPosition.y, attributes, state);
+        }
         const auto textPositionAfter = state.text.data();
 
         // TODO: A row should not be marked as wrapped just because we wrote the last column.
@@ -190,8 +180,7 @@ void AdaptDispatch::_WriteToBuffer(const std::wstring_view string)
 
     // Notify UIA of new text.
     // It's important to do this here instead of in TextBuffer, because here you
-    // have access to the entire line of text, whereas TextBuffer writes it one
-    // character at a time via the OutputCellIterator.
+    // have access to the entire line of text.
     textBuffer.TriggerNewTextNotification(string);
 }