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Merge pull request #187 from mitchellh/clear-at-prompt

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clear_screen uses FF (0x0C) if cursor is at prompt
This commit is contained in:
Mitchell Hashimoto
2023-07-05 14:21:27 -07:00
committed by GitHub
parent 2ac9fec908 2f935d2c5c
commit c4a44c3dd4
1 changed files with 25 additions and 11 deletions
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36
src/termio/Exec.zig
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@ -258,20 +258,34 @@ pub fn resize(
/// Clear the screen. /// Clear the screen.
pub fn clearScreen(self: *Exec, history: bool) !void { pub fn clearScreen(self: *Exec, history: bool) !void {
self.renderer_state.mutex.lock(); {
defer self.renderer_state.mutex.unlock(); self.renderer_state.mutex.lock();
defer self.renderer_state.mutex.unlock();
// If we're on the alternate screen, we do not clear. Since this is an // If we're on the alternate screen, we do not clear. Since this is an
// emulator-level screen clear, this messes up the running programs // emulator-level screen clear, this messes up the running programs
// knowledge of where the cursor is and causes rendering issues. So, // knowledge of where the cursor is and causes rendering issues. So,
// for alt screen, we do nothing. // for alt screen, we do nothing.
if (self.terminal.active_screen == .alternate) return; if (self.terminal.active_screen == .alternate) return;
// Clear our scrollback // Clear our scrollback
if (history) try self.terminal.screen.clear(.history); if (history) try self.terminal.screen.clear(.history);
// Clear above the cursor // If we're not at a prompt, we clear the screen manually using
try self.terminal.screen.clear(.above_cursor); // the terminal screen state. If we are at a prompt, we send
// form-feed so that the shell can repaint the entire screen.
if (!self.terminal.cursorIsAtPrompt()) {
// Clear above the cursor
try self.terminal.screen.clear(.above_cursor);
// Exit
return;
}
}
// 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});
} }
pub inline fn queueWrite(self: *Exec, data: []const u8) !void { pub inline fn queueWrite(self: *Exec, data: []const u8) !void {