The Terminal has a lot of problems resizing right now. I'm going to use this issue to try and track them all, and make sure we get holistic solutions.

• Bug: resizing doesn't work properly in Windows Terminal #1465 Bug: resizing doesn't work properly in Windows Terminal (PR Add support for "reflow"ing the Terminal buffer #4741)
  • This is "scrollback doesn't reflow on resize, it instead gets clamped/cut off"
  • Scrollback not rewrapped on resize Scrollback not rewrapped on resize #3491
• linewrap then backspace produces unexpected visuals, missing characters #1245 linewrap then backspace produces unexpected visuals, missing characters
  • Generally related to linewrapping in the Terminal
  • Also related to the original One cell at the right end of the screen is ignored #357
• Maintain scrollbar position during resize #3494 Maintain scrollbar position during resize
• Closing a pane does not reset the PowerShell text position Closing a pane does not reset the PowerShell text position #2432
  • 3/17: I believe this is actually a PSReadline bug, so I'm removing it from this todo list

Bucket of horrible conpty resizing chaos

• Flattening the window loses scrollback lines #3490 Flattening the window loses scrollback lines (PR When the Terminal is resized, don't remove lines from scrollback #4354) (PR Add support for "reflow"ing the Terminal buffer #4741)
  • This one has kinda spiraled out of control
  • Visual artefacts in splitted window #4771 Possibly a dupe? "Visual artefacts in splitted window"

Conpty cursor visibility bugs, that aren't actually related to resizing but found in the meantime

• MSYS2 bash: Cursor display doesn't follow arrow keys after running Emacs MSYS2 bash: Cursor display doesn't follow arrow keys after running Emacs #2697
• Bug Report Zooming causes the second line to act strange Bug Report Zooming causes the second line to act strange #2211
• Curses programming: cursor handled incorrectly Curses programming: cursor handled incorrectly #4102
• Emacs cursor displayed incorrectly Emacs cursor displayed incorrectly #2642
• Cursor position seems to be mispositioned when using WLS2 & git rebase Cursor position seems to be mispositioned when using WLS2 & git rebase #4644

Conpty needs to emit lines of text so that a terminal emulator can wrap them

• MSFT:16485846 [conpty] Wrapped lines should not render a \r\n
  • And regression: MSFT:18123777: lines that are wrapped are also moved up by one row
  • I'm sure there's a GH issue that's the equivalent of that issue, but I haven't found it yet.
    • maybe "Text Wrapping with ConPTY  #405 Text Wrapping with ConPTY"
• WSL Terminal Line Endings (the "exact wrap" bug) #3088 WSL Terminal Line Endings
  • This looks related - probably some combo of "conpty doesn't emit wrapped lines" and "Terminal doesn't mark lines as wrapped correctly"
  • 3/17: I no longer believe that this is part of the same ResizeWithReflow madness, and that this was instead a bug that's existed in conhost for a while now.
• Make sure WT can copy wrapped lines as a single line #3367 Make sure WT can copy wrapped lines as a single line

Bugs in the wake of #4741

• Reflow with long input loses cursor #4955 Reflow with long input loses cursor
  • Turns out we couldn't repro this one.
• Alt+ Enter rendering error  #5029 Alt+Enter rendering error
• Terminal background color has the wrong color applied when terminal is snapped #5178 Terminal background color has the wrong color applied when terminal is snapped
  • this was actually Weird blue selection after closing neovim (WSL) #3848, so we're punting it

Some alt-buffer things that we're punting till v1.x

• Alternate screen shouldn't write to scrollback or normal screen #3492 Alternate screen shouldn't write to scrollback or normal screen
• Consider not wrapping the alternate screen on resize #3493 Consider not wrapping the alternate screen on resize
• ConPTY: pass through requests for the alt buffer #381 ConPTY: pass through requests for the alt buffer
  • This is also Lines scrolled up by less command remain to exist after quitting the command #4676 Lines scrolled up by less command remain to exist after quitting the command