Initial release of the Windows Terminal source code

This commit introduces all of the Windows Terminal and Console Host source,
under the MIT license.

src/buffer/out/RowCellIterator.cpp

@@ -0,0 +1,111 @@
+// Copyright (c) Microsoft Corporation.
+// Licensed under the MIT license.
+
+#include "precomp.h"
+
+#include "RowCellIterator.hpp"
+#include "Row.hpp"
+
+#include "../../types/inc/convert.hpp"
+#include "../../types/inc/Utf16Parser.hpp"
+
+RowCellIterator::RowCellIterator(const ROW& row, const size_t start, const size_t length) :
+    _row(row),
+    _start(start),
+    _length(length),
+    _pos(start),
+    _view(s_GenerateView(row, start))
+{
+
+}
+
+RowCellIterator::operator bool() const noexcept
+{
+    // In lieu of using start and end, this custom iterator type simply becomes bool false
+    // when we run out of items to iterate over.
+    return _pos < (_start + _length);
+}
+
+bool RowCellIterator::operator==(const RowCellIterator& it) const noexcept
+{
+    return _row == it._row &&
+        _start == it._start &&
+        _length == it._length &&
+        _pos == it._pos;
+}
+bool RowCellIterator::operator!=(const RowCellIterator& it) const noexcept
+{
+    return !(*this == it);
+}
+
+RowCellIterator& RowCellIterator::operator+=(const ptrdiff_t& movement)
+{
+    _pos += movement;
+
+    return (*this);
+}
+
+RowCellIterator& RowCellIterator::operator++()
+{
+    return this->operator+=(1);
+}
+
+RowCellIterator RowCellIterator::operator++(int)
+{
+    auto temp(*this);
+    operator++();
+    return temp;
+}
+
+RowCellIterator RowCellIterator::operator+(const ptrdiff_t& movement)
+{
+    auto temp(*this);
+    temp += movement;
+    return temp;
+}
+
+const OutputCellView& RowCellIterator::operator*() const
+{
+    return _view;
+}
+
+const OutputCellView* RowCellIterator::operator->() const
+{
+    return &_view;
+}
+
+// Routine Description:
+// - Member function to update the view to the current position in the buffer with
+//   the data held on this object.
+// Arguments:
+// - <none>
+// Return Value:
+// - <none>
+void RowCellIterator::_RefreshView()
+{
+    _view = s_GenerateView(_row, _pos);
+}
+
+// Routine Description:
+// - Static function to create a view.
+// - It's pulled out statically so it can be used during construction with just the given
+//   variables (so OutputCellView doesn't need an empty default constructor)
+// - This will infer the width of the glyph and apply the appropriate attributes to the view.
+// Arguments:
+// - view - View representing characters corresponding to a single glyph
+// - attr - Color attributes to apply to the text
+// Return Value:
+// - Object representing the view into this cell
+OutputCellView RowCellIterator::s_GenerateView(const ROW& row,
+                                               const size_t pos)
+{
+    const auto& charRow = row.GetCharRow();
+
+    const auto glyph = charRow.GlyphAt(pos);
+    const auto dbcsAttr = charRow.DbcsAttrAt(pos);
+
+    const auto textAttr = row.GetAttrRow().GetAttrByColumn(pos);
+    const auto behavior = TextAttributeBehavior::Stored;
+
+    return OutputCellView(glyph, dbcsAttr, textAttr, behavior);
+}