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Merge pull request #972 from mitchellh/claer-screen

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termio: clear_screen binding does not trigger scrollback preservation
This commit is contained in:
Mitchell Hashimoto
2023-11-30 12:33:27 -08:00
committed by GitHub
parent ee08346dfe 810242b472
commit e27eb727c4
1 changed files with 10 additions and 8 deletions
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18
src/termio/Exec.zig
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@ -451,22 +451,24 @@ pub fn clearScreen(self: *Exec, history: bool) !void {
if (self.terminal.active_screen == .alternate) return;
// Clear our scrollback
if (history) try self.terminal.screen.clear(.history);
if (history) self.terminal.eraseDisplay(self.alloc, .scrollback, false);
// If we're not at a prompt, we clear the screen manually using
// the terminal screen state. If we are at a prompt, we send
// form-feed so that the shell can repaint the entire screen.
// If we're not at a prompt, we just delete above the cursor.
if (!self.terminal.cursorIsAtPrompt()) {
// Clear above the cursor
try self.terminal.screen.clear(.above_cursor);
// Exit
return;
}
// At a prompt, we want to first fully clear the screen, and then after
// send a FF (0x0C) to the shell so that it can repaint the screen.
// Mark the current row as a not a prompt so we can properly
// clear the full screen in the next eraseDisplay call.
self.terminal.markSemanticPrompt(.command);
assert(!self.terminal.cursorIsAtPrompt());
self.terminal.eraseDisplay(self.alloc, .complete, false);
}
// If we reached here it means we're at a prompt, so we send a form-feed.
assert(self.terminal.cursorIsAtPrompt());
try self.queueWrite(&[_]u8{0x0C}, false);
}