## Summary of the Pull Request
This adds a new action, `clearBuffer`. It accepts 3 values for the `clear` type:
* `"clear": "screen"`: Clear the terminal viewport content. Leaves the scrollback untouched. Moves the cursor row to the top of the viewport (unmodified).
* `"clear": "scrollback"`: Clear the scrollback. Leaves the viewport untouched.
* `"clear": "all"`: (**default**) Clear the scrollback and the visible viewport. Moves the cursor row to the top of the viewport (unmodified).
"Clear Buffer" has also been added to `defaults.json`.
## References
* From microsoft/vscode#75141 originally
## PR Checklist
* [x] Closes#1193
* [x] Closes#1882
* [x] I work here
* [x] Tests added/passed
* [ ] Requires documentation to be updated
## Detailed Description of the Pull Request / Additional comments
This is a bit tricky, because we need to plumb it all the way through conpty to clear the buffer. If we don't, then conpty will immediately just redraw the screen. So this sends a signal to the attached conpty, and then waits for conpty to draw the updated, cleared, screen back to us.
## Validation Steps Performed
* works for each of the three clear types as expected
* tests pass.
* works even with `ping -t 8.8.8.8` as you'd hope.
This commit renames the functions in conpty.lib to Conpty* so that they
can be explicitly linked and introduces a header so they can be located.
It also updates the DEF for conpty.dll to reexport them with their
original names.
The crux of the issue here is that TerminalConnection is consuming the
_import_ symbols for the *PseudoConsole family of APIs, which simply
cannot be supplanted by a static library.
Avenues explored: * Exporting __imp_x from the static library to get all
up in kernel32's business. * Using /ALTERNATENAME:__imp_X=StaticX. It
turns out ALTERNATENAME is only consulted when the symbol isn't found
through traditional means.
This, renaming them, is the straightest path forward.
Fixes#3553.
* Make ConPTY build as both LIB and DLL.
* Update TerminalConnection reference to LIB version (because Terminal builds both UWP and Centennial, requiring different CRTs each).
* DLL is now available (and against desktop CRT) to be PInvokable from C# for WPF terminal.
Note, DLL MUST BUILD PRECOMP to get the magic pragma linking information to the Desktop CRT.
* don't audit PTY lib. I can't do safe things because the safe things we use don't fit back inside kernelbase.dll.
Closes#3563.
2019-11-14 11:22:00 -08:00
Renamed from src/winconpty/winconpty.def (Browse further)
