From 6172275252f5f724d874163462f5394800f8d55b Mon Sep 17 00:00:00 2001 From: ChihGodlee <61595521+ChihGodlee@users.noreply.github.com> Date: Wed, 20 May 2026 20:05:38 +0800 Subject: feat(experimental): add reveal_hidden_cursor_for_cjk_ime opt-in for CJK IME tracking MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit When the focused pane requests ?25l (cursor hidden) but paints its own cursor — common in TUIs like Claude Code, pi, and codex — macOS native input methods stop tracking the candidate-window position. CJK users (Chinese / Japanese / Korean) cannot see candidate windows follow as they type. Setting [experimental] reveal_hidden_cursor_for_cjk_ime = true exposes the focused pane's cursor anchor to the outer terminal regardless of the pane's hidden-cursor request, restoring IME tracking for CJK input. [experimental] cjk_ime_agents is an optional allow-list. When empty, the reveal applies to any focused pane. When non-empty (e.g. ["claude", "codex"]), the reveal only applies if the focused pane's detected agent matches one of the listed names. This lets users enable the workaround only for AI-agent TUIs that paint their own cursor, leaving plain shells and other programs untouched. Accepted names: pi, claude, codex, gemini, cursor, cline, opencode, copilot, kimi, kiro, droid, amp, grok, hermes. Unknown names are ignored. When the pane reports no cursor position (cursor_state returns None for some TUIs), the anchor falls back to the pane's top-left so a stable IME hint is always available. [experimental] cjk_ime_cursor_shape (default "steady_block") controls the DECSCUSR shape rendered for the revealed cursor; six variants are accepted: block, steady_block, underline, steady_underline, bar, steady_bar. Trade-off when enabled: a hardware cursor will be visible in the outer terminal for apps that hide the cursor without painting a replacement. Default false preserves the behavior set in 2c95071. Pair the reveal with cjk_ime_agents to scope it to specific TUIs. Manually verified on macOS 26.5 aarch64 with system Pinyin IME against Claude Code: candidate window tracks cursor with flag enabled, returns to anchored-at-start behavior with flag disabled. refs #149 --- src/server/headless.rs | 143 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 143 insertions(+) (limited to 'src/server/headless.rs') diff --git a/src/server/headless.rs b/src/server/headless.rs index 49724ffe..f56dbdeb 100644 --- a/src/server/headless.rs +++ b/src/server/headless.rs @@ -2684,6 +2684,149 @@ mod tests { ); } + #[tokio::test] + async fn virtual_render_exposes_hidden_pane_cursor_when_reveal_hidden_for_cjk_ime() { + let mut state = AppState::test_new(); + state.reveal_hidden_cursor_for_cjk_ime = true; + let mut ws = crate::workspace::Workspace::test_new("test"); + let pane_id = ws.tabs[0].root_pane; + ws.insert_test_runtime( + pane_id, + crate::terminal::TerminalRuntime::test_with_screen_bytes(20, 5, b"left\x1b[?25l"), + ); + + state.workspaces = vec![ws]; + state.active = Some(0); + state.selected = 0; + state.mode = crate::app::Mode::Terminal; + + let area = Rect::new(0, 0, 80, 24); + let (_buffer, cursor) = + crate::server::render_stream::render_virtual(&mut state, area, true); + let pane = state + .view + .pane_infos + .iter() + .find(|info| info.id == pane_id) + .expect("focused pane info"); + + assert_eq!( + cursor, + Some(CursorState { + x: pane.inner_rect.x + 4, + y: pane.inner_rect.y, + visible: true, + shape: state.cjk_ime_cursor_shape, + }) + ); + } + + #[tokio::test] + async fn virtual_render_keeps_cursor_hidden_when_scrolled_back_even_with_reveal_hidden_for_cjk_ime( + ) { + let mut state = AppState::test_new(); + state.reveal_hidden_cursor_for_cjk_ime = true; + let mut ws = crate::workspace::Workspace::test_new("test"); + let pane_id = ws.tabs[0].root_pane; + let mut bytes = Vec::new(); + for line in 0..80 { + bytes.extend_from_slice(format!("line {line:02}\r\n").as_bytes()); + } + let runtime = + crate::terminal::TerminalRuntime::test_with_scrollback_bytes(20, 5, 4096, &bytes); + ws.insert_test_runtime(pane_id, runtime); + + state.workspaces = vec![ws]; + state.active = Some(0); + state.selected = 0; + state.mode = crate::app::Mode::Terminal; + + let area = Rect::new(0, 0, 80, 24); + let _ = crate::server::render_stream::render_virtual(&mut state, area, true); + let runtime = state + .runtime_for_pane(pane_id) + .expect("pane runtime after initial render"); + runtime.scroll_up(6); + assert!(crate::ui::pane_is_scrolled_back(runtime)); + + let (_buffer, cursor) = + crate::server::render_stream::render_virtual(&mut state, area, true); + + assert!( + cursor.as_ref().is_none_or(|cursor| !cursor.visible), + "scrolled-back focused pane should keep the cursor hidden even when reveal_hidden_cursor_for_cjk_ime is true; got {cursor:?}", + ); + } + + #[tokio::test] + async fn virtual_render_fallback_cursor_when_viewport_none_and_reveal_hidden_for_cjk_ime() { + let mut state = AppState::test_new(); + state.reveal_hidden_cursor_for_cjk_ime = true; + let mut ws = crate::workspace::Workspace::test_new("test"); + let pane_id = ws.tabs[0].root_pane; + // Feed only ?25l with no prior cursor movement — exercises the fallback + // path for TUIs whose viewport has no cursor position. + ws.insert_test_runtime( + pane_id, + crate::terminal::TerminalRuntime::test_with_screen_bytes(20, 5, b"\x1b[?25l"), + ); + + state.workspaces = vec![ws]; + state.active = Some(0); + state.selected = 0; + state.mode = crate::app::Mode::Terminal; + + let area = Rect::new(0, 0, 80, 24); + let (_buffer, cursor) = + crate::server::render_stream::render_virtual(&mut state, area, true); + let pane = state + .view + .pane_infos + .iter() + .find(|info| info.id == pane_id) + .expect("focused pane info"); + + assert_eq!( + cursor, + Some(CursorState { + x: pane.inner_rect.x, + y: pane.inner_rect.y, + visible: true, + shape: state.cjk_ime_cursor_shape, + }), + "fallback should anchor at pane top-left with the configured shape", + ); + } + + #[tokio::test] + async fn virtual_render_skips_reveal_when_focused_pane_has_no_detected_agent() { + let mut state = AppState::test_new(); + state.reveal_hidden_cursor_for_cjk_ime = true; + // Filter only Claude, but the test pane has no detected agent, so the + // reveal must not apply. + state.cjk_ime_agents = vec![crate::detect::Agent::Claude]; + let mut ws = crate::workspace::Workspace::test_new("test"); + let pane_id = ws.tabs[0].root_pane; + ws.insert_test_runtime( + pane_id, + crate::terminal::TerminalRuntime::test_with_screen_bytes(20, 5, b"left\x1b[?25l"), + ); + + state.workspaces = vec![ws]; + state.active = Some(0); + state.selected = 0; + state.mode = crate::app::Mode::Terminal; + + let area = Rect::new(0, 0, 80, 24); + let (_buffer, cursor) = + crate::server::render_stream::render_virtual(&mut state, area, true); + + assert!( + cursor.as_ref().is_none_or(|cursor| !cursor.visible), + "agent filter should suppress reveal when the focused pane's detected agent is not on the list; got {cursor:?}", + ); + } + #[tokio::test] async fn virtual_render_omits_focused_pane_cursor_while_mobile_switcher_open() { let mut state = AppState::test_new(); 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