diff options
Diffstat (limited to 'Utilities/cmlibuv/src/win/tty.c')
| -rw-r--r-- | Utilities/cmlibuv/src/win/tty.c | 121 |
1 files changed, 84 insertions, 37 deletions
diff --git a/Utilities/cmlibuv/src/win/tty.c b/Utilities/cmlibuv/src/win/tty.c index a6f5839..05a11e8 100644 --- a/Utilities/cmlibuv/src/win/tty.c +++ b/Utilities/cmlibuv/src/win/tty.c @@ -112,14 +112,30 @@ static int uv_tty_virtual_offset = -1; static int uv_tty_virtual_height = -1; static int uv_tty_virtual_width = -1; +/* The console window size + * We keep this separate from uv_tty_virtual_*. We use those values to only + * handle signalling SIGWINCH + */ + +static HANDLE uv__tty_console_handle = INVALID_HANDLE_VALUE; +static int uv__tty_console_height = -1; +static int uv__tty_console_width = -1; + +static DWORD WINAPI uv__tty_console_resize_message_loop_thread(void* param); +static void CALLBACK uv__tty_console_resize_event(HWINEVENTHOOK hWinEventHook, + DWORD event, + HWND hwnd, + LONG idObject, + LONG idChild, + DWORD dwEventThread, + DWORD dwmsEventTime); + /* We use a semaphore rather than a mutex or critical section because in some cases (uv__cancel_read_console) we need take the lock in the main thread and release it in another thread. Using a semaphore ensures that in such scenario the main thread will still block when trying to acquire the lock. */ static uv_sem_t uv_tty_output_lock; -static HANDLE uv_tty_output_handle = INVALID_HANDLE_VALUE; - static WORD uv_tty_default_text_attributes = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE; @@ -141,6 +157,18 @@ static void uv__determine_vterm_state(HANDLE handle); void uv_console_init(void) { if (uv_sem_init(&uv_tty_output_lock, 1)) abort(); + uv__tty_console_handle = CreateFileW(L"CONOUT$", + GENERIC_READ | GENERIC_WRITE, + FILE_SHARE_WRITE, + 0, + OPEN_EXISTING, + 0, + 0); + if (uv__tty_console_handle != NULL) { + QueueUserWorkItem(uv__tty_console_resize_message_loop_thread, + NULL, + WT_EXECUTELONGFUNCTION); + } } @@ -148,6 +176,7 @@ int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, uv_file fd, int readable) { HANDLE handle; CONSOLE_SCREEN_BUFFER_INFO screen_buffer_info; + uv__once_init(); handle = (HANDLE) uv__get_osfhandle(fd); if (handle == INVALID_HANDLE_VALUE) return UV_EBADF; @@ -183,11 +212,6 @@ int uv_tty_init(uv_loop_t* loop, uv_tty_t* tty, uv_file fd, int readable) { if (uv__vterm_state == UV_UNCHECKED) uv__determine_vterm_state(handle); - /* Store the global tty output handle. This handle is used by TTY read */ - /* streams to update the virtual window when a CONSOLE_BUFFER_SIZE_EVENT */ - /* is received. */ - uv_tty_output_handle = handle; - /* Remember the original console text attributes. */ uv_tty_capture_initial_style(&screen_buffer_info); @@ -704,25 +728,7 @@ void uv_process_tty_read_raw_req(uv_loop_t* loop, uv_tty_t* handle, } records_left--; - /* If the window was resized, recompute the virtual window size. This */ - /* will trigger a SIGWINCH signal if the window size changed in an */ - /* way that matters to libuv. */ - if (handle->tty.rd.last_input_record.EventType == WINDOW_BUFFER_SIZE_EVENT) { - CONSOLE_SCREEN_BUFFER_INFO info; - - uv_sem_wait(&uv_tty_output_lock); - - if (uv_tty_output_handle != INVALID_HANDLE_VALUE && - GetConsoleScreenBufferInfo(uv_tty_output_handle, &info)) { - uv_tty_update_virtual_window(&info); - } - - uv_sem_post(&uv_tty_output_lock); - - continue; - } - - /* Ignore other events that are not key or resize events. */ + /* Ignore other events that are not key events. */ if (handle->tty.rd.last_input_record.EventType != KEY_EVENT) { continue; } @@ -1102,9 +1108,6 @@ static int uv__cancel_read_console(uv_tty_t* handle) { static void uv_tty_update_virtual_window(CONSOLE_SCREEN_BUFFER_INFO* info) { - int old_virtual_width = uv_tty_virtual_width; - int old_virtual_height = uv_tty_virtual_height; - uv_tty_virtual_width = info->dwSize.X; uv_tty_virtual_height = info->srWindow.Bottom - info->srWindow.Top + 1; @@ -1124,14 +1127,6 @@ static void uv_tty_update_virtual_window(CONSOLE_SCREEN_BUFFER_INFO* info) { if (uv_tty_virtual_offset < 0) { uv_tty_virtual_offset = 0; } - - /* If the virtual window size changed, emit a SIGWINCH signal. Don't emit */ - /* if this was the first time the virtual window size was computed. */ - if (old_virtual_width != -1 && old_virtual_height != -1 && - (uv_tty_virtual_width != old_virtual_width || - uv_tty_virtual_height != old_virtual_height)) { - uv__signal_dispatch(SIGWINCH); - } } @@ -2279,3 +2274,55 @@ static void uv__determine_vterm_state(HANDLE handle) { uv__vterm_state = UV_SUPPORTED; } + +static DWORD WINAPI uv__tty_console_resize_message_loop_thread(void* param) { + CONSOLE_SCREEN_BUFFER_INFO sb_info; + MSG msg; + + if (!GetConsoleScreenBufferInfo(uv__tty_console_handle, &sb_info)) + return 0; + + uv__tty_console_width = sb_info.dwSize.X; + uv__tty_console_height = sb_info.srWindow.Bottom - sb_info.srWindow.Top + 1; + + if (pSetWinEventHook == NULL) + return 0; + + if (!pSetWinEventHook(EVENT_CONSOLE_LAYOUT, + EVENT_CONSOLE_LAYOUT, + NULL, + uv__tty_console_resize_event, + 0, + 0, + WINEVENT_OUTOFCONTEXT)) + return 0; + + while (GetMessage(&msg, NULL, 0, 0)) { + TranslateMessage(&msg); + DispatchMessage(&msg); + } + return 0; +} + +static void CALLBACK uv__tty_console_resize_event(HWINEVENTHOOK hWinEventHook, + DWORD event, + HWND hwnd, + LONG idObject, + LONG idChild, + DWORD dwEventThread, + DWORD dwmsEventTime) { + CONSOLE_SCREEN_BUFFER_INFO sb_info; + int width, height; + + if (!GetConsoleScreenBufferInfo(uv__tty_console_handle, &sb_info)) + return; + + width = sb_info.dwSize.X; + height = sb_info.srWindow.Bottom - sb_info.srWindow.Top + 1; + + if (width != uv__tty_console_width || height != uv__tty_console_height) { + uv__tty_console_width = width; + uv__tty_console_height = height; + uv__signal_dispatch(SIGWINCH); + } +} |