diff options
Diffstat (limited to 'third-party/libuv/src/win/tty.c')
| -rw-r--r-- | third-party/libuv/src/win/tty.c | 1873 |
1 files changed, 1873 insertions, 0 deletions
diff --git a/third-party/libuv/src/win/tty.c b/third-party/libuv/src/win/tty.c new file mode 100644 index 0000000000..8855af350e --- /dev/null +++ b/third-party/libuv/src/win/tty.c @@ -0,0 +1,1873 @@ +/* Copyright Joyent, Inc. and other Node contributors. All rights reserved. + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to + * deal in the Software without restriction, including without limitation the + * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or + * sell copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING + * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS + * IN THE SOFTWARE. + */ + +#include <assert.h> +#include <io.h> +#include <string.h> +#include <stdlib.h> + +#if defined(_MSC_VER) && _MSC_VER < 1600 +# include "stdint-msvc2008.h" +#else +# include <stdint.h> +#endif + +#include "uv.h" +#include "internal.h" +#include "handle-inl.h" +#include "stream-inl.h" +#include "req-inl.h" + + +#define UNICODE_REPLACEMENT_CHARACTER (0xfffd) + +#define ANSI_NORMAL 0x00 +#define ANSI_ESCAPE_SEEN 0x02 +#define ANSI_CSI 0x04 +#define ANSI_ST_CONTROL 0x08 +#define ANSI_IGNORE 0x10 +#define ANSI_IN_ARG 0x20 +#define ANSI_IN_STRING 0x40 +#define ANSI_BACKSLASH_SEEN 0x80 + + +static void uv_tty_update_virtual_window(CONSOLE_SCREEN_BUFFER_INFO* info); + + +/* Null uv_buf_t */ +static const uv_buf_t uv_null_buf_ = { 0, NULL }; + + +/* + * The console virtual window. + * + * Normally cursor movement in windows is relative to the console screen buffer, + * e.g. the application is allowed to overwrite the 'history'. This is very + * inconvenient, it makes absolute cursor movement pretty useless. There is + * also the concept of 'client rect' which is defined by the actual size of + * the console window and the scroll position of the screen buffer, but it's + * very volatile because it changes when the user scrolls. + * + * To make cursor movement behave sensibly we define a virtual window to which + * cursor movement is confined. The virtual window is always as wide as the + * console screen buffer, but it's height is defined by the size of the + * console window. The top of the virtual window aligns with the position + * of the caret when the first stdout/err handle is created, unless that would + * mean that it would extend beyond the bottom of the screen buffer - in that + * that case it's located as far down as possible. + * + * When the user writes a long text or many newlines, such that the output + * reaches beyond the bottom of the virtual window, the virtual window is + * shifted downwards, but not resized. + * + * Since all tty i/o happens on the same console, this window is shared + * between all stdout/stderr handles. + */ + +static int uv_tty_virtual_offset = -1; +static int uv_tty_virtual_height = -1; +static int uv_tty_virtual_width = -1; + +static CRITICAL_SECTION uv_tty_output_lock; + +static HANDLE uv_tty_output_handle = INVALID_HANDLE_VALUE; + + +void uv_console_init() { + InitializeCriticalSection(&uv_tty_output_lock); +} + + +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; + + handle = (HANDLE) _get_osfhandle(fd); + if (handle == INVALID_HANDLE_VALUE) { + return UV_EBADF; + } + + if (!readable) { + /* Obtain the screen buffer info with the output handle. */ + if (!GetConsoleScreenBufferInfo(handle, &screen_buffer_info)) { + return uv_translate_sys_error(GetLastError()); + } + + /* Obtain the the tty_output_lock because the virtual window state is */ + /* shared between all uv_tty_t handles. */ + EnterCriticalSection(&uv_tty_output_lock); + + /* 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; + + uv_tty_update_virtual_window(&screen_buffer_info); + + LeaveCriticalSection(&uv_tty_output_lock); + } + + + uv_stream_init(loop, (uv_stream_t*) tty, UV_TTY); + uv_connection_init((uv_stream_t*) tty); + + tty->handle = handle; + tty->reqs_pending = 0; + tty->flags |= UV_HANDLE_BOUND; + + if (readable) { + /* Initialize TTY input specific fields. */ + tty->flags |= UV_HANDLE_TTY_READABLE | UV_HANDLE_READABLE; + tty->read_line_handle = NULL; + tty->read_line_buffer = uv_null_buf_; + tty->read_raw_wait = NULL; + + /* Init keycode-to-vt100 mapper state. */ + tty->last_key_len = 0; + tty->last_key_offset = 0; + tty->last_utf16_high_surrogate = 0; + memset(&tty->last_input_record, 0, sizeof tty->last_input_record); + } else { + /* TTY output specific fields. */ + tty->flags |= UV_HANDLE_WRITABLE; + + /* Init utf8-to-utf16 conversion state. */ + tty->utf8_bytes_left = 0; + tty->utf8_codepoint = 0; + + /* Initialize eol conversion state */ + tty->previous_eol = 0; + + /* Init ANSI parser state. */ + tty->ansi_parser_state = ANSI_NORMAL; + } + + return 0; +} + + +int uv_tty_set_mode(uv_tty_t* tty, int mode) { + DWORD flags; + unsigned char was_reading; + uv_alloc_cb alloc_cb; + uv_read_cb read_cb; + int err; + + if (!(tty->flags & UV_HANDLE_TTY_READABLE)) { + return UV_EINVAL; + } + + if (!!mode == !!(tty->flags & UV_HANDLE_TTY_RAW)) { + return 0; + } + + if (mode) { + /* Raw input */ + flags = ENABLE_WINDOW_INPUT; + } else { + /* Line-buffered mode. */ + flags = ENABLE_ECHO_INPUT | ENABLE_LINE_INPUT | ENABLE_PROCESSED_INPUT; + } + + if (!SetConsoleMode(tty->handle, flags)) { + return uv_translate_sys_error(GetLastError()); + } + + /* If currently reading, stop, and restart reading. */ + if (tty->flags & UV_HANDLE_READING) { + was_reading = 1; + alloc_cb = tty->alloc_cb; + read_cb = tty->read_cb; + + if (was_reading) { + err = uv_tty_read_stop(tty); + if (err) { + return uv_translate_sys_error(err); + } + } + } else { + was_reading = 0; + } + + /* Update flag. */ + tty->flags &= ~UV_HANDLE_TTY_RAW; + tty->flags |= mode ? UV_HANDLE_TTY_RAW : 0; + + /* If we just stopped reading, restart. */ + if (was_reading) { + err = uv_tty_read_start(tty, alloc_cb, read_cb); + if (err) { + return uv_translate_sys_error(err); + } + } + + return 0; +} + + +int uv_is_tty(uv_file file) { + DWORD result; + return GetConsoleMode((HANDLE) _get_osfhandle(file), &result) != 0; +} + + +int uv_tty_get_winsize(uv_tty_t* tty, int* width, int* height) { + CONSOLE_SCREEN_BUFFER_INFO info; + + if (!GetConsoleScreenBufferInfo(tty->handle, &info)) { + return uv_translate_sys_error(GetLastError()); + } + + EnterCriticalSection(&uv_tty_output_lock); + uv_tty_update_virtual_window(&info); + LeaveCriticalSection(&uv_tty_output_lock); + + *width = uv_tty_virtual_width; + *height = uv_tty_virtual_height; + + return 0; +} + + +static void CALLBACK uv_tty_post_raw_read(void* data, BOOLEAN didTimeout) { + uv_loop_t* loop; + uv_tty_t* handle; + uv_req_t* req; + + assert(data); + assert(!didTimeout); + + req = (uv_req_t*) data; + handle = (uv_tty_t*) req->data; + loop = handle->loop; + + UnregisterWait(handle->read_raw_wait); + handle->read_raw_wait = NULL; + + SET_REQ_SUCCESS(req); + POST_COMPLETION_FOR_REQ(loop, req); +} + + +static void uv_tty_queue_read_raw(uv_loop_t* loop, uv_tty_t* handle) { + uv_read_t* req; + BOOL r; + + assert(handle->flags & UV_HANDLE_READING); + assert(!(handle->flags & UV_HANDLE_READ_PENDING)); + + assert(handle->handle && handle->handle != INVALID_HANDLE_VALUE); + + handle->read_line_buffer = uv_null_buf_; + + req = &handle->read_req; + memset(&req->overlapped, 0, sizeof(req->overlapped)); + + r = RegisterWaitForSingleObject(&handle->read_raw_wait, + handle->handle, + uv_tty_post_raw_read, + (void*) req, + INFINITE, + WT_EXECUTEINWAITTHREAD | WT_EXECUTEONLYONCE); + if (!r) { + handle->read_raw_wait = NULL; + SET_REQ_ERROR(req, GetLastError()); + uv_insert_pending_req(loop, (uv_req_t*)req); + } + + handle->flags |= UV_HANDLE_READ_PENDING; + handle->reqs_pending++; +} + + +static DWORD CALLBACK uv_tty_line_read_thread(void* data) { + uv_loop_t* loop; + uv_tty_t* handle; + uv_req_t* req; + DWORD bytes, read_bytes; + + assert(data); + + req = (uv_req_t*) data; + handle = (uv_tty_t*) req->data; + loop = handle->loop; + + assert(handle->read_line_buffer.base != NULL); + assert(handle->read_line_buffer.len > 0); + + /* ReadConsole can't handle big buffers. */ + if (handle->read_line_buffer.len < 8192) { + bytes = handle->read_line_buffer.len; + } else { + bytes = 8192; + } + + /* Todo: Unicode */ + if (ReadConsoleA(handle->read_line_handle, + (void*) handle->read_line_buffer.base, + bytes, + &read_bytes, + NULL)) { + SET_REQ_SUCCESS(req); + req->overlapped.InternalHigh = read_bytes; + } else { + SET_REQ_ERROR(req, GetLastError()); + } + + POST_COMPLETION_FOR_REQ(loop, req); + return 0; +} + + +static void uv_tty_queue_read_line(uv_loop_t* loop, uv_tty_t* handle) { + uv_read_t* req; + BOOL r; + + assert(handle->flags & UV_HANDLE_READING); + assert(!(handle->flags & UV_HANDLE_READ_PENDING)); + assert(handle->handle && handle->handle != INVALID_HANDLE_VALUE); + + req = &handle->read_req; + memset(&req->overlapped, 0, sizeof(req->overlapped)); + + handle->alloc_cb((uv_handle_t*) handle, 8192, &handle->read_line_buffer); + if (handle->read_line_buffer.len == 0) { + handle->read_cb((uv_stream_t*) handle, + UV_ENOBUFS, + &handle->read_line_buffer); + return; + } + assert(handle->read_line_buffer.base != NULL); + + /* Duplicate the console handle, so if we want to cancel the read, we can */ + /* just close this handle duplicate. */ + if (handle->read_line_handle == NULL) { + HANDLE this_process = GetCurrentProcess(); + r = DuplicateHandle(this_process, + handle->handle, + this_process, + &handle->read_line_handle, + 0, + 0, + DUPLICATE_SAME_ACCESS); + if (!r) { + handle->read_line_handle = NULL; + SET_REQ_ERROR(req, GetLastError()); + uv_insert_pending_req(loop, (uv_req_t*)req); + goto out; + } + } + + r = QueueUserWorkItem(uv_tty_line_read_thread, + (void*) req, + WT_EXECUTELONGFUNCTION); + if (!r) { + SET_REQ_ERROR(req, GetLastError()); + uv_insert_pending_req(loop, (uv_req_t*)req); + } + + out: + handle->flags |= UV_HANDLE_READ_PENDING; + handle->reqs_pending++; +} + + +static void uv_tty_queue_read(uv_loop_t* loop, uv_tty_t* handle) { + if (handle->flags & UV_HANDLE_TTY_RAW) { + uv_tty_queue_read_raw(loop, handle); + } else { + uv_tty_queue_read_line(loop, handle); + } +} + + +static const char* get_vt100_fn_key(DWORD code, char shift, char ctrl, + size_t* len) { +#define VK_CASE(vk, normal_str, shift_str, ctrl_str, shift_ctrl_str) \ + case (vk): \ + if (shift && ctrl) { \ + *len = sizeof shift_ctrl_str; \ + return "\033" shift_ctrl_str; \ + } else if (shift) { \ + *len = sizeof shift_str ; \ + return "\033" shift_str; \ + } else if (ctrl) { \ + *len = sizeof ctrl_str; \ + return "\033" ctrl_str; \ + } else { \ + *len = sizeof normal_str; \ + return "\033" normal_str; \ + } + + switch (code) { + /* These mappings are the same as Cygwin's. Unmodified and alt-modified */ + /* keypad keys comply with linux console, modifiers comply with xterm */ + /* modifier usage. F1..f12 and shift-f1..f10 comply with linux console, */ + /* f6..f12 with and without modifiers comply with rxvt. */ + VK_CASE(VK_INSERT, "[2~", "[2;2~", "[2;5~", "[2;6~") + VK_CASE(VK_END, "[4~", "[4;2~", "[4;5~", "[4;6~") + VK_CASE(VK_DOWN, "[B", "[1;2B", "[1;5B", "[1;6B") + VK_CASE(VK_NEXT, "[6~", "[6;2~", "[6;5~", "[6;6~") + VK_CASE(VK_LEFT, "[D", "[1;2D", "[1;5D", "[1;6D") + VK_CASE(VK_CLEAR, "[G", "[1;2G", "[1;5G", "[1;6G") + VK_CASE(VK_RIGHT, "[C", "[1;2C", "[1;5C", "[1;6C") + VK_CASE(VK_UP, "[A", "[1;2A", "[1;5A", "[1;6A") + VK_CASE(VK_HOME, "[1~", "[1;2~", "[1;5~", "[1;6~") + VK_CASE(VK_PRIOR, "[5~", "[5;2~", "[5;5~", "[5;6~") + VK_CASE(VK_DELETE, "[3~", "[3;2~", "[3;5~", "[3;6~") + VK_CASE(VK_NUMPAD0, "[2~", "[2;2~", "[2;5~", "[2;6~") + VK_CASE(VK_NUMPAD1, "[4~", "[4;2~", "[4;5~", "[4;6~") + VK_CASE(VK_NUMPAD2, "[B", "[1;2B", "[1;5B", "[1;6B") + VK_CASE(VK_NUMPAD3, "[6~", "[6;2~", "[6;5~", "[6;6~") + VK_CASE(VK_NUMPAD4, "[D", "[1;2D", "[1;5D", "[1;6D") + VK_CASE(VK_NUMPAD5, "[G", "[1;2G", "[1;5G", "[1;6G") + VK_CASE(VK_NUMPAD6, "[C", "[1;2C", "[1;5C", "[1;6C") + VK_CASE(VK_NUMPAD7, "[A", "[1;2A", "[1;5A", "[1;6A") + VK_CASE(VK_NUMPAD8, "[1~", "[1;2~", "[1;5~", "[1;6~") + VK_CASE(VK_NUMPAD9, "[5~", "[5;2~", "[5;5~", "[5;6~") + VK_CASE(VK_DECIMAL, "[3~", "[3;2~", "[3;5~", "[3;6~") + VK_CASE(VK_F1, "[[A", "[23~", "[11^", "[23^" ) + VK_CASE(VK_F2, "[[B", "[24~", "[12^", "[24^" ) + VK_CASE(VK_F3, "[[C", "[25~", "[13^", "[25^" ) + VK_CASE(VK_F4, "[[D", "[26~", "[14^", "[26^" ) + VK_CASE(VK_F5, "[[E", "[28~", "[15^", "[28^" ) + VK_CASE(VK_F6, "[17~", "[29~", "[17^", "[29^" ) + VK_CASE(VK_F7, "[18~", "[31~", "[18^", "[31^" ) + VK_CASE(VK_F8, "[19~", "[32~", "[19^", "[32^" ) + VK_CASE(VK_F9, "[20~", "[33~", "[20^", "[33^" ) + VK_CASE(VK_F10, "[21~", "[34~", "[21^", "[34^" ) + VK_CASE(VK_F11, "[23~", "[23$", "[23^", "[23@" ) + VK_CASE(VK_F12, "[24~", "[24$", "[24^", "[24@" ) + + default: + *len = 0; + return NULL; + } +#undef VK_CASE +} + + +void uv_process_tty_read_raw_req(uv_loop_t* loop, uv_tty_t* handle, + uv_req_t* req) { + /* Shortcut for handle->last_input_record.Event.KeyEvent. */ +#define KEV handle->last_input_record.Event.KeyEvent + + DWORD records_left, records_read; + uv_buf_t buf; + off_t buf_used; + + assert(handle->type == UV_TTY); + assert(handle->flags & UV_HANDLE_TTY_READABLE); + handle->flags &= ~UV_HANDLE_READ_PENDING; + + if (!(handle->flags & UV_HANDLE_READING) || + !(handle->flags & UV_HANDLE_TTY_RAW)) { + goto out; + } + + if (!REQ_SUCCESS(req)) { + /* An error occurred while waiting for the event. */ + if ((handle->flags & UV_HANDLE_READING)) { + handle->flags &= ~UV_HANDLE_READING; + handle->read_cb((uv_stream_t*)handle, + uv_translate_sys_error(GET_REQ_ERROR(req)), + &uv_null_buf_); + } + goto out; + } + + /* Fetch the number of events */ + if (!GetNumberOfConsoleInputEvents(handle->handle, &records_left)) { + handle->flags &= ~UV_HANDLE_READING; + DECREASE_ACTIVE_COUNT(loop, handle); + handle->read_cb((uv_stream_t*)handle, + uv_translate_sys_error(GetLastError()), + &uv_null_buf_); + goto out; + } + + /* Windows sends a lot of events that we're not interested in, so buf */ + /* will be allocated on demand, when there's actually something to emit. */ + buf = uv_null_buf_; + buf_used = 0; + + while ((records_left > 0 || handle->last_key_len > 0) && + (handle->flags & UV_HANDLE_READING)) { + if (handle->last_key_len == 0) { + /* Read the next input record */ + if (!ReadConsoleInputW(handle->handle, + &handle->last_input_record, + 1, + &records_read)) { + handle->flags &= ~UV_HANDLE_READING; + DECREASE_ACTIVE_COUNT(loop, handle); + handle->read_cb((uv_stream_t*) handle, + uv_translate_sys_error(GetLastError()), + &buf); + goto out; + } + 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->last_input_record.EventType == WINDOW_BUFFER_SIZE_EVENT) { + CONSOLE_SCREEN_BUFFER_INFO info; + + EnterCriticalSection(&uv_tty_output_lock); + + if (uv_tty_output_handle != INVALID_HANDLE_VALUE && + GetConsoleScreenBufferInfo(uv_tty_output_handle, &info)) { + uv_tty_update_virtual_window(&info); + } + + LeaveCriticalSection(&uv_tty_output_lock); + + continue; + } + + /* Ignore other events that are not key or resize events. */ + if (handle->last_input_record.EventType != KEY_EVENT) { + continue; + } + + /* Ignore keyup events, unless the left alt key was held and a valid */ + /* unicode character was emitted. */ + if (!KEV.bKeyDown && !(((KEV.dwControlKeyState & LEFT_ALT_PRESSED) || + KEV.wVirtualKeyCode==VK_MENU) && KEV.uChar.UnicodeChar != 0)) { + continue; + } + + /* Ignore keypresses to numpad number keys if the left alt is held */ + /* because the user is composing a character, or windows simulating */ + /* this. */ + if ((KEV.dwControlKeyState & LEFT_ALT_PRESSED) && + !(KEV.dwControlKeyState & ENHANCED_KEY) && + (KEV.wVirtualKeyCode == VK_INSERT || + KEV.wVirtualKeyCode == VK_END || + KEV.wVirtualKeyCode == VK_DOWN || + KEV.wVirtualKeyCode == VK_NEXT || + KEV.wVirtualKeyCode == VK_LEFT || + KEV.wVirtualKeyCode == VK_CLEAR || + KEV.wVirtualKeyCode == VK_RIGHT || + KEV.wVirtualKeyCode == VK_HOME || + KEV.wVirtualKeyCode == VK_UP || + KEV.wVirtualKeyCode == VK_PRIOR || + KEV.wVirtualKeyCode == VK_NUMPAD0 || + KEV.wVirtualKeyCode == VK_NUMPAD1 || + KEV.wVirtualKeyCode == VK_NUMPAD2 || + KEV.wVirtualKeyCode == VK_NUMPAD3 || + KEV.wVirtualKeyCode == VK_NUMPAD4 || + KEV.wVirtualKeyCode == VK_NUMPAD5 || + KEV.wVirtualKeyCode == VK_NUMPAD6 || + KEV.wVirtualKeyCode == VK_NUMPAD7 || + KEV.wVirtualKeyCode == VK_NUMPAD8 || + KEV.wVirtualKeyCode == VK_NUMPAD9)) { + continue; + } + + if (KEV.uChar.UnicodeChar != 0) { + int prefix_len, char_len; + + /* Character key pressed */ + if (KEV.uChar.UnicodeChar >= 0xD800 && + KEV.uChar.UnicodeChar < 0xDC00) { + /* UTF-16 high surrogate */ + handle->last_utf16_high_surrogate = KEV.uChar.UnicodeChar; + continue; + } + + /* Prefix with \u033 if alt was held, but alt was not used as part */ + /* a compose sequence. */ + if ((KEV.dwControlKeyState & (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) + && !(KEV.dwControlKeyState & (LEFT_CTRL_PRESSED | + RIGHT_CTRL_PRESSED)) && KEV.bKeyDown) { + handle->last_key[0] = '\033'; + prefix_len = 1; + } else { + prefix_len = 0; + } + + if (KEV.uChar.UnicodeChar >= 0xDC00 && + KEV.uChar.UnicodeChar < 0xE000) { + /* UTF-16 surrogate pair */ + WCHAR utf16_buffer[2] = { handle->last_utf16_high_surrogate, + KEV.uChar.UnicodeChar}; + char_len = WideCharToMultiByte(CP_UTF8, + 0, + utf16_buffer, + 2, + &handle->last_key[prefix_len], + sizeof handle->last_key, + NULL, + NULL); + } else { + /* Single UTF-16 character */ + char_len = WideCharToMultiByte(CP_UTF8, + 0, + &KEV.uChar.UnicodeChar, + 1, + &handle->last_key[prefix_len], + sizeof handle->last_key, + NULL, + NULL); + } + + /* Whatever happened, the last character wasn't a high surrogate. */ + handle->last_utf16_high_surrogate = 0; + + /* If the utf16 character(s) couldn't be converted something must */ + /* be wrong. */ + if (!char_len) { + handle->flags &= ~UV_HANDLE_READING; + DECREASE_ACTIVE_COUNT(loop, handle); + handle->read_cb((uv_stream_t*) handle, + uv_translate_sys_error(GetLastError()), + &buf); + goto out; + } + + handle->last_key_len = (unsigned char) (prefix_len + char_len); + handle->last_key_offset = 0; + continue; + + } else { + /* Function key pressed */ + const char* vt100; + size_t prefix_len, vt100_len; + + vt100 = get_vt100_fn_key(KEV.wVirtualKeyCode, + !!(KEV.dwControlKeyState & SHIFT_PRESSED), + !!(KEV.dwControlKeyState & ( + LEFT_CTRL_PRESSED | + RIGHT_CTRL_PRESSED)), + &vt100_len); + + /* If we were unable to map to a vt100 sequence, just ignore. */ + if (!vt100) { + continue; + } + + /* Prefix with \x033 when the alt key was held. */ + if (KEV.dwControlKeyState & (LEFT_ALT_PRESSED | RIGHT_ALT_PRESSED)) { + handle->last_key[0] = '\033'; + prefix_len = 1; + } else { + prefix_len = 0; + } + + /* Copy the vt100 sequence to the handle buffer. */ + assert(prefix_len + vt100_len < sizeof handle->last_key); + memcpy(&handle->last_key[prefix_len], vt100, vt100_len); + + handle->last_key_len = (unsigned char) (prefix_len + vt100_len); + handle->last_key_offset = 0; + continue; + } + } else { + /* Copy any bytes left from the last keypress to the user buffer. */ + if (handle->last_key_offset < handle->last_key_len) { + /* Allocate a buffer if needed */ + if (buf_used == 0) { + handle->alloc_cb((uv_handle_t*) handle, 1024, &buf); + if (buf.len == 0) { + handle->read_cb((uv_stream_t*) handle, UV_ENOBUFS, &buf); + goto out; + } + assert(buf.base != NULL); + } + + buf.base[buf_used++] = handle->last_key[handle->last_key_offset++]; + + /* If the buffer is full, emit it */ + if (buf_used == buf.len) { + handle->read_cb((uv_stream_t*) handle, buf_used, &buf); + buf = uv_null_buf_; + buf_used = 0; + } + + continue; + } + + /* Apply dwRepeat from the last input record. */ + if (--KEV.wRepeatCount > 0) { + handle->last_key_offset = 0; + continue; + } + + handle->last_key_len = 0; + continue; + } + } + + /* Send the buffer back to the user */ + if (buf_used > 0) { + handle->read_cb((uv_stream_t*) handle, buf_used, &buf); + } + + out: + /* Wait for more input events. */ + if ((handle->flags & UV_HANDLE_READING) && + !(handle->flags & UV_HANDLE_READ_PENDING)) { + uv_tty_queue_read(loop, handle); + } + + DECREASE_PENDING_REQ_COUNT(handle); + +#undef KEV +} + + + +void uv_process_tty_read_line_req(uv_loop_t* loop, uv_tty_t* handle, + uv_req_t* req) { + uv_buf_t buf; + + assert(handle->type == UV_TTY); + assert(handle->flags & UV_HANDLE_TTY_READABLE); + + buf = handle->read_line_buffer; + + handle->flags &= ~UV_HANDLE_READ_PENDING; + handle->read_line_buffer = uv_null_buf_; + + if (!REQ_SUCCESS(req)) { + /* Read was not successful */ + if ((handle->flags & UV_HANDLE_READING) && + handle->read_line_handle != NULL) { + /* Real error */ + handle->flags &= ~UV_HANDLE_READING; + DECREASE_ACTIVE_COUNT(loop, handle); + handle->read_cb((uv_stream_t*) handle, + uv_translate_sys_error(GET_REQ_ERROR(req)), + &buf); + } else { + /* The read was cancelled, or whatever we don't care */ + handle->read_cb((uv_stream_t*) handle, 0, &buf); + } + + } else { + /* Read successful */ + /* TODO: read unicode, convert to utf-8 */ + DWORD bytes = req->overlapped.InternalHigh; + handle->read_cb((uv_stream_t*) handle, bytes, &buf); + } + + /* Wait for more input events. */ + if ((handle->flags & UV_HANDLE_READING) && + !(handle->flags & UV_HANDLE_READ_PENDING)) { + uv_tty_queue_read(loop, handle); + } + + DECREASE_PENDING_REQ_COUNT(handle); +} + + +void uv_process_tty_read_req(uv_loop_t* loop, uv_tty_t* handle, + uv_req_t* req) { + assert(handle->type == UV_TTY); + assert(handle->flags & UV_HANDLE_TTY_READABLE); + + /* If the read_line_buffer member is zero, it must have been an raw read. */ + /* Otherwise it was a line-buffered read. */ + /* FIXME: This is quite obscure. Use a flag or something. */ + if (handle->read_line_buffer.len == 0) { + uv_process_tty_read_raw_req(loop, handle, req); + } else { + uv_process_tty_read_line_req(loop, handle, req); + } +} + + +int uv_tty_read_start(uv_tty_t* handle, uv_alloc_cb alloc_cb, + uv_read_cb read_cb) { + uv_loop_t* loop = handle->loop; + + if (!(handle->flags & UV_HANDLE_TTY_READABLE)) { + return ERROR_INVALID_PARAMETER; + } + + handle->flags |= UV_HANDLE_READING; + INCREASE_ACTIVE_COUNT(loop, handle); + handle->read_cb = read_cb; + handle->alloc_cb = alloc_cb; + + /* If reading was stopped and then started again, there could still be a */ + /* read request pending. */ + if (handle->flags & UV_HANDLE_READ_PENDING) { + return 0; + } + + /* Maybe the user stopped reading half-way while processing key events. */ + /* Short-circuit if this could be the case. */ + if (handle->last_key_len > 0) { + SET_REQ_SUCCESS(&handle->read_req); + uv_insert_pending_req(handle->loop, (uv_req_t*) &handle->read_req); + return 0; + } + + uv_tty_queue_read(loop, handle); + + return 0; +} + + +int uv_tty_read_stop(uv_tty_t* handle) { + handle->flags &= ~UV_HANDLE_READING; + DECREASE_ACTIVE_COUNT(handle->loop, handle); + + /* Cancel raw read */ + if ((handle->flags & UV_HANDLE_READ_PENDING) && + (handle->flags & UV_HANDLE_TTY_RAW)) { + /* Write some bullshit event to force the console wait to return. */ + INPUT_RECORD record; + DWORD written; + memset(&record, 0, sizeof record); + if (!WriteConsoleInputW(handle->handle, &record, 1, &written)) { + return GetLastError(); + } + } + + /* Cancel line-buffered read */ + if (handle->read_line_handle != NULL) { + /* Closing this handle will cancel the ReadConsole operation */ + CloseHandle(handle->read_line_handle); + handle->read_line_handle = NULL; + } + + + return 0; +} + + +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; + + /* Recompute virtual window offset row. */ + if (uv_tty_virtual_offset == -1) { + uv_tty_virtual_offset = info->dwCursorPosition.Y; + } else if (uv_tty_virtual_offset < info->dwCursorPosition.Y - + uv_tty_virtual_height + 1) { + /* If suddenly find the cursor outside of the virtual window, it must */ + /* have somehow scrolled. Update the virtual window offset. */ + uv_tty_virtual_offset = info->dwCursorPosition.Y - + uv_tty_virtual_height + 1; + } + if (uv_tty_virtual_offset + uv_tty_virtual_height > info->dwSize.Y) { + uv_tty_virtual_offset = info->dwSize.Y - uv_tty_virtual_height; + } + 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); + } +} + + +static COORD uv_tty_make_real_coord(uv_tty_t* handle, + CONSOLE_SCREEN_BUFFER_INFO* info, int x, unsigned char x_relative, int y, + unsigned char y_relative) { + COORD result; + + uv_tty_update_virtual_window(info); + + /* Adjust y position */ + if (y_relative) { + y = info->dwCursorPosition.Y + y; + } else { + y = uv_tty_virtual_offset + y; + } + /* Clip y to virtual client rectangle */ + if (y < uv_tty_virtual_offset) { + y = uv_tty_virtual_offset; + } else if (y >= uv_tty_virtual_offset + uv_tty_virtual_height) { + y = uv_tty_virtual_offset + uv_tty_virtual_height - 1; + } + + /* Adjust x */ + if (x_relative) { + x = info->dwCursorPosition.X + x; + } + /* Clip x */ + if (x < 0) { + x = 0; + } else if (x >= uv_tty_virtual_width) { + x = uv_tty_virtual_width - 1; + } + + result.X = (unsigned short) x; + result.Y = (unsigned short) y; + return result; +} + + +static int uv_tty_emit_text(uv_tty_t* handle, WCHAR buffer[], DWORD length, + DWORD* error) { + DWORD written; + + if (*error != ERROR_SUCCESS) { + return -1; + } + + if (!WriteConsoleW(handle->handle, + (void*) buffer, + length, + &written, + NULL)) { + *error = GetLastError(); + return -1; + } + + return 0; +} + + +static int uv_tty_move_caret(uv_tty_t* handle, int x, unsigned char x_relative, + int y, unsigned char y_relative, DWORD* error) { + CONSOLE_SCREEN_BUFFER_INFO info; + COORD pos; + + if (*error != ERROR_SUCCESS) { + return -1; + } + + retry: + if (!GetConsoleScreenBufferInfo(handle->handle, &info)) { + *error = GetLastError(); + } + + pos = uv_tty_make_real_coord(handle, &info, x, x_relative, y, y_relative); + + if (!SetConsoleCursorPosition(handle->handle, pos)) { + if (GetLastError() == ERROR_INVALID_PARAMETER) { + /* The console may be resized - retry */ + goto retry; + } else { + *error = GetLastError(); + return -1; + } + } + + return 0; +} + + +static int uv_tty_reset(uv_tty_t* handle, DWORD* error) { + const COORD origin = {0, 0}; + const WORD char_attrs = FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE; + CONSOLE_SCREEN_BUFFER_INFO info; + DWORD count, written; + + if (*error != ERROR_SUCCESS) { + return -1; + } + + /* Reset original text attributes. */ + if (!SetConsoleTextAttribute(handle->handle, char_attrs)) { + *error = GetLastError(); + return -1; + } + + /* Move the cursor position to (0, 0). */ + if (!SetConsoleCursorPosition(handle->handle, origin)) { + *error = GetLastError(); + return -1; + } + + /* Clear the screen buffer. */ + retry: + if (!GetConsoleScreenBufferInfo(handle->handle, &info)) { + *error = GetLastError(); + return -1; + } + + count = info.dwSize.X * info.dwSize.Y; + + if (!(FillConsoleOutputCharacterW(handle->handle, + L'\x20', + count, + origin, + &written) && + FillConsoleOutputAttribute(handle->handle, + char_attrs, + written, + origin, + &written))) { + if (GetLastError() == ERROR_INVALID_PARAMETER) { + /* The console may be resized - retry */ + goto retry; + } else { + *error = GetLastError(); + return -1; + } + } + + /* Move the virtual window up to the top. */ + uv_tty_virtual_offset = 0; + uv_tty_update_virtual_window(&info); + + return 0; +} + + +static int uv_tty_clear(uv_tty_t* handle, int dir, char entire_screen, + DWORD* error) { + CONSOLE_SCREEN_BUFFER_INFO info; + COORD start, end; + DWORD count, written; + + int x1, x2, y1, y2; + int x1r, x2r, y1r, y2r; + + if (*error != ERROR_SUCCESS) { + return -1; + } + + if (dir == 0) { + /* Clear from current position */ + x1 = 0; + x1r = 1; + } else { + /* Clear from column 0 */ + x1 = 0; + x1r = 0; + } + + if (dir == 1) { + /* Clear to current position */ + x2 = 0; + x2r = 1; + } else { + /* Clear to end of row. We pretend the console is 65536 characters wide, */ + /* uv_tty_make_real_coord will clip it to the actual console width. */ + x2 = 0xffff; + x2r = 0; + } + + if (!entire_screen) { + /* Stay on our own row */ + y1 = y2 = 0; + y1r = y2r = 1; + } else { + /* Apply columns direction to row */ + y1 = x1; + y1r = x1r; + y2 = x2; + y2r = x2r; + } + + retry: + if (!GetConsoleScreenBufferInfo(handle->handle, &info)) { + *error = GetLastError(); + return -1; + } + + start = uv_tty_make_real_coord(handle, &info, x1, x1r, y1, y1r); + end = uv_tty_make_real_coord(handle, &info, x2, x2r, y2, y2r); + count = (end.Y * info.dwSize.X + end.X) - + (start.Y * info.dwSize.X + start.X) + 1; + + if (!(FillConsoleOutputCharacterW(handle->handle, + L'\x20', + count, + start, + &written) && + FillConsoleOutputAttribute(handle->handle, + info.wAttributes, + written, + start, + &written))) { + if (GetLastError() == ERROR_INVALID_PARAMETER) { + /* The console may be resized - retry */ + goto retry; + } else { + *error = GetLastError(); + return -1; + } + } + + return 0; +} + + +static int uv_tty_set_style(uv_tty_t* handle, DWORD* error) { + unsigned short argc = handle->ansi_csi_argc; + unsigned short* argv = handle->ansi_csi_argv; + int i; + CONSOLE_SCREEN_BUFFER_INFO info; + + char fg_color = -1, bg_color = -1; + char fg_bright = -1, bg_bright = -1; + + if (argc == 0) { + /* Reset mode */ + fg_color = 7; + bg_color = 0; + fg_bright = 0; + bg_bright = 0; + } + + for (i = 0; i < argc; i++) { + short arg = argv[i]; + + if (arg == 0) { + /* Reset mode */ + fg_color = 7; + bg_color = 0; + fg_bright = 0; + bg_bright = 0; + + } else if (arg == 1) { + /* Foreground bright on */ + fg_bright = 1; + + } else if (arg == 2) { + /* Both bright off */ + fg_bright = 0; + bg_bright = 0; + + } else if (arg == 5) { + /* Background bright on */ + bg_bright = 1; + + } else if (arg == 21 || arg == 22) { + /* Foreground bright off */ + fg_bright = 0; + + } else if (arg == 25) { + /* Background bright off */ + bg_bright = 0; + + } else if (arg >= 30 && arg <= 37) { + /* Set foreground color */ + fg_color = arg - 30; + + } else if (arg == 39) { + /* Default text color */ + fg_color = 7; + fg_bright = 0; + + } else if (arg >= 40 && arg <= 47) { + /* Set background color */ + bg_color = arg - 40; + + } else if (arg == 49) { + /* Default background color */ + bg_color = 0; + bg_bright = 0; + + } else if (arg >= 90 && arg <= 97) { + /* Set bold foreground color */ + fg_bright = 1; + fg_color = arg - 90; + + } else if (arg >= 100 && arg <= 107) { + /* Set bold background color */ + bg_bright = 1; + bg_color = arg - 100; + + } + } + + if (fg_color == -1 && bg_color == -1 && fg_bright == -1 && + bg_bright == -1) { + /* Nothing changed */ + return 0; + } + + if (!GetConsoleScreenBufferInfo(handle->handle, &info)) { + *error = GetLastError(); + return -1; + } + + if (fg_color != -1) { + info.wAttributes &= ~(FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE); + if (fg_color & 1) info.wAttributes |= FOREGROUND_RED; + if (fg_color & 2) info.wAttributes |= FOREGROUND_GREEN; + if (fg_color & 4) info.wAttributes |= FOREGROUND_BLUE; + } + + if (fg_bright != -1) { + if (fg_bright) { + info.wAttributes |= FOREGROUND_INTENSITY; + } else { + info.wAttributes &= ~FOREGROUND_INTENSITY; + } + } + + if (bg_color != -1) { + info.wAttributes &= ~(BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE); + if (bg_color & 1) info.wAttributes |= BACKGROUND_RED; + if (bg_color & 2) info.wAttributes |= BACKGROUND_GREEN; + if (bg_color & 4) info.wAttributes |= BACKGROUND_BLUE; + } + + if (bg_bright != -1) { + if (bg_bright) { + info.wAttributes |= BACKGROUND_INTENSITY; + } else { + info.wAttributes &= ~BACKGROUND_INTENSITY; + } + } + + if (!SetConsoleTextAttribute(handle->handle, info.wAttributes)) { + *error = GetLastError(); + return -1; + } + + return 0; +} + + +static int uv_tty_save_state(uv_tty_t* handle, unsigned char save_attributes, + DWORD* error) { + CONSOLE_SCREEN_BUFFER_INFO info; + + if (*error != ERROR_SUCCESS) { + return -1; + } + + if (!GetConsoleScreenBufferInfo(handle->handle, &info)) { + *error = GetLastError(); + return -1; + } + + uv_tty_update_virtual_window(&info); + + handle->saved_position.X = info.dwCursorPosition.X; + handle->saved_position.Y = info.dwCursorPosition.Y - uv_tty_virtual_offset; + handle->flags |= UV_HANDLE_TTY_SAVED_POSITION; + + if (save_attributes) { + handle->saved_attributes = info.wAttributes & + (FOREGROUND_INTENSITY | BACKGROUND_INTENSITY); + handle->flags |= UV_HANDLE_TTY_SAVED_ATTRIBUTES; + } + + return 0; +} + + +static int uv_tty_restore_state(uv_tty_t* handle, + unsigned char restore_attributes, DWORD* error) { + CONSOLE_SCREEN_BUFFER_INFO info; + WORD new_attributes; + + if (*error != ERROR_SUCCESS) { + return -1; + } + + if (handle->flags & UV_HANDLE_TTY_SAVED_POSITION) { + if (uv_tty_move_caret(handle, + handle->saved_position.X, + 0, + handle->saved_position.Y, + 0, + error) != 0) { + return -1; + } + } + + if (restore_attributes && + (handle->flags & UV_HANDLE_TTY_SAVED_ATTRIBUTES)) { + if (!GetConsoleScreenBufferInfo(handle->handle, &info)) { + *error = GetLastError(); + return -1; + } + + new_attributes = info.wAttributes; + new_attributes &= ~(FOREGROUND_INTENSITY | BACKGROUND_INTENSITY); + new_attributes |= handle->saved_attributes; + + if (!SetConsoleTextAttribute(handle->handle, new_attributes)) { + *error = GetLastError(); + return -1; + } + } + + return 0; +} + + +static int uv_tty_write_bufs(uv_tty_t* handle, + const uv_buf_t bufs[], + unsigned int nbufs, + DWORD* error) { + /* We can only write 8k characters at a time. Windows can't handle */ + /* much more characters in a single console write anyway. */ + WCHAR utf16_buf[8192]; + DWORD utf16_buf_used = 0; + unsigned int i; + +#define FLUSH_TEXT() \ + do { \ + if (utf16_buf_used > 0) { \ + uv_tty_emit_text(handle, utf16_buf, utf16_buf_used, error); \ + utf16_buf_used = 0; \ + } \ + } while (0) + + /* Cache for fast access */ + unsigned char utf8_bytes_left = handle->utf8_bytes_left; + unsigned int utf8_codepoint = handle->utf8_codepoint; + unsigned char previous_eol = handle->previous_eol; + unsigned char ansi_parser_state = handle->ansi_parser_state; + + /* Store the error here. If we encounter an error, stop trying to do i/o */ + /* but keep parsing the buffer so we leave the parser in a consistent */ + /* state. */ + *error = ERROR_SUCCESS; + + EnterCriticalSection(&uv_tty_output_lock); + + for (i = 0; i < nbufs; i++) { + uv_buf_t buf = bufs[i]; + unsigned int j; + + for (j = 0; j < buf.len; j++) { + unsigned char c = buf.base[j]; + + /* Run the character through the utf8 decoder We happily accept non */ + /* shortest form encodings and invalid code points - there's no real */ + /* harm that can be done. */ + if (utf8_bytes_left == 0) { + /* Read utf-8 start byte */ + DWORD first_zero_bit; + unsigned char not_c = ~c; +#ifdef _MSC_VER /* msvc */ + if (_BitScanReverse(&first_zero_bit, not_c)) { +#else /* assume gcc */ + if (c != 0) { + first_zero_bit = (sizeof(int) * 8) - 1 - __builtin_clz(not_c); +#endif + if (first_zero_bit == 7) { + /* Ascii - pass right through */ + utf8_codepoint = (unsigned int) c; + + } else if (first_zero_bit <= 5) { + /* Multibyte sequence */ + utf8_codepoint = (0xff >> (8 - first_zero_bit)) & c; + utf8_bytes_left = (char) (6 - first_zero_bit); + + } else { + /* Invalid continuation */ + utf8_codepoint = UNICODE_REPLACEMENT_CHARACTER; + } + + } else { + /* 0xff -- invalid */ + utf8_codepoint = UNICODE_REPLACEMENT_CHARACTER; + } + + } else if ((c & 0xc0) == 0x80) { + /* Valid continuation of utf-8 multibyte sequence */ + utf8_bytes_left--; + utf8_codepoint <<= 6; + utf8_codepoint |= ((unsigned int) c & 0x3f); + + } else { + /* Start byte where continuation was expected. */ + utf8_bytes_left = 0; + utf8_codepoint = UNICODE_REPLACEMENT_CHARACTER; + /* Patch buf offset so this character will be parsed again as a */ + /* start byte. */ + j--; + } + + /* Maybe we need to parse more bytes to find a character. */ + if (utf8_bytes_left != 0) { + continue; + } + + /* Parse vt100/ansi escape codes */ + if (ansi_parser_state == ANSI_NORMAL) { + switch (utf8_codepoint) { + case '\033': + ansi_parser_state = ANSI_ESCAPE_SEEN; + continue; + + case 0233: + ansi_parser_state = ANSI_CSI; + handle->ansi_csi_argc = 0; + continue; + } + + } else if (ansi_parser_state == ANSI_ESCAPE_SEEN) { + switch (utf8_codepoint) { + case '[': + ansi_parser_state = ANSI_CSI; + handle->ansi_csi_argc = 0; + continue; + + case '^': + case '_': + case 'P': + case ']': + /* Not supported, but we'll have to parse until we see a stop */ + /* code, e.g. ESC \ or BEL. */ + ansi_parser_state = ANSI_ST_CONTROL; + continue; + + case '\033': + /* Ignore double escape. */ + continue; + + case 'c': + /* Full console reset. */ + FLUSH_TEXT(); + uv_tty_reset(handle, error); + ansi_parser_state = ANSI_NORMAL; + continue; + + case '7': + /* Save the cursor position and text attributes. */ + FLUSH_TEXT(); + uv_tty_save_state(handle, 1, error); + ansi_parser_state = ANSI_NORMAL; + continue; + + case '8': + /* Restore the cursor position and text attributes */ + FLUSH_TEXT(); + uv_tty_restore_state(handle, 1, error); + ansi_parser_state = ANSI_NORMAL; + continue; + + default: + if (utf8_codepoint >= '@' && utf8_codepoint <= '_') { + /* Single-char control. */ + ansi_parser_state = ANSI_NORMAL; + continue; + } else { + /* Invalid - proceed as normal, */ + ansi_parser_state = ANSI_NORMAL; + } + } + + } else if (ansi_parser_state & ANSI_CSI) { + if (!(ansi_parser_state & ANSI_IGNORE)) { + if (utf8_codepoint >= '0' && utf8_codepoint <= '9') { + /* Parsing a numerical argument */ + + if (!(ansi_parser_state & ANSI_IN_ARG)) { + /* We were not currently parsing a number */ + + /* Check for too many arguments */ + if (handle->ansi_csi_argc >= ARRAY_SIZE(handle->ansi_csi_argv)) { + ansi_parser_state |= ANSI_IGNORE; + continue; + } + + ansi_parser_state |= ANSI_IN_ARG; + handle->ansi_csi_argc++; + handle->ansi_csi_argv[handle->ansi_csi_argc - 1] = + (unsigned short) utf8_codepoint - '0'; + continue; + } else { + /* We were already parsing a number. Parse next digit. */ + uint32_t value = 10 * + handle->ansi_csi_argv[handle->ansi_csi_argc - 1]; + + /* Check for overflow. */ + if (value > UINT16_MAX) { + ansi_parser_state |= ANSI_IGNORE; + continue; + } + + handle->ansi_csi_argv[handle->ansi_csi_argc - 1] = + (unsigned short) value + (utf8_codepoint - '0'); + continue; + } + + } else if (utf8_codepoint == ';') { + /* Denotes the end of an argument. */ + if (ansi_parser_state & ANSI_IN_ARG) { + ansi_parser_state &= ~ANSI_IN_ARG; + continue; + + } else { + /* If ANSI_IN_ARG is not set, add another argument and */ + /* default it to 0. */ + /* Check for too many arguments */ + if (handle->ansi_csi_argc >= ARRAY_SIZE(handle->ansi_csi_argv)) { + ansi_parser_state |= ANSI_IGNORE; + continue; + } + + handle->ansi_csi_argc++; + handle->ansi_csi_argv[handle->ansi_csi_argc - 1] = 0; + continue; + } + + } else if (utf8_codepoint >= '@' && utf8_codepoint <= '~' && + (handle->ansi_csi_argc > 0 || utf8_codepoint != '[')) { + int x, y, d; + + /* Command byte */ + switch (utf8_codepoint) { + case 'A': + /* cursor up */ + FLUSH_TEXT(); + y = -(handle->ansi_csi_argc ? handle->ansi_csi_argv[0] : 1); + uv_tty_move_caret(handle, 0, 1, y, 1, error); + break; + + case 'B': + /* cursor down */ + FLUSH_TEXT(); + y = handle->ansi_csi_argc ? handle->ansi_csi_argv[0] : 1; + uv_tty_move_caret(handle, 0, 1, y, 1, error); + break; + + case 'C': + /* cursor forward */ + FLUSH_TEXT(); + x = handle->ansi_csi_argc ? handle->ansi_csi_argv[0] : 1; + uv_tty_move_caret(handle, x, 1, 0, 1, error); + break; + + case 'D': + /* cursor back */ + FLUSH_TEXT(); + x = -(handle->ansi_csi_argc ? handle->ansi_csi_argv[0] : 1); + uv_tty_move_caret(handle, x, 1, 0, 1, error); + break; + + case 'E': + /* cursor next line */ + FLUSH_TEXT(); + y = handle->ansi_csi_argc ? handle->ansi_csi_argv[0] : 1; + uv_tty_move_caret(handle, 0, 0, y, 1, error); + break; + + case 'F': + /* cursor previous line */ + FLUSH_TEXT(); + y = -(handle->ansi_csi_argc ? handle->ansi_csi_argv[0] : 1); + uv_tty_move_caret(handle, 0, 0, y, 1, error); + break; + + case 'G': + /* cursor horizontal move absolute */ + FLUSH_TEXT(); + x = (handle->ansi_csi_argc >= 1 && handle->ansi_csi_argv[0]) + ? handle->ansi_csi_argv[0] - 1 : 0; + uv_tty_move_caret(handle, x, 0, 0, 1, error); + break; + + case 'H': + case 'f': + /* cursor move absolute */ + FLUSH_TEXT(); + y = (handle->ansi_csi_argc >= 1 && handle->ansi_csi_argv[0]) + ? handle->ansi_csi_argv[0] - 1 : 0; + x = (handle->ansi_csi_argc >= 2 && handle->ansi_csi_argv[1]) + ? handle->ansi_csi_argv[1] - 1 : 0; + uv_tty_move_caret(handle, x, 0, y, 0, error); + break; + + case 'J': + /* Erase screen */ + FLUSH_TEXT(); + d = handle->ansi_csi_argc ? handle->ansi_csi_argv[0] : 0; + if (d >= 0 && d <= 2) { + uv_tty_clear(handle, d, 1, error); + } + break; + + case 'K': + /* Erase line */ + FLUSH_TEXT(); + d = handle->ansi_csi_argc ? handle->ansi_csi_argv[0] : 0; + if (d >= 0 && d <= 2) { + uv_tty_clear(handle, d, 0, error); + } + break; + + case 'm': + /* Set style */ + FLUSH_TEXT(); + uv_tty_set_style(handle, error); + break; + + case 's': + /* Save the cursor position. */ + FLUSH_TEXT(); + uv_tty_save_state(handle, 0, error); + break; + + case 'u': + /* Restore the cursor position */ + FLUSH_TEXT(); + uv_tty_restore_state(handle, 0, error); + break; + } + + /* Sequence ended - go back to normal state. */ + ansi_parser_state = ANSI_NORMAL; + continue; + + } else { + /* We don't support commands that use private mode characters or */ + /* intermediaries. Ignore the rest of the sequence. */ + ansi_parser_state |= ANSI_IGNORE; + continue; + } + } else { + /* We're ignoring this command. Stop only on command character. */ + if (utf8_codepoint >= '@' && utf8_codepoint <= '~') { + ansi_parser_state = ANSI_NORMAL; + } + continue; + } + + } else if (ansi_parser_state & ANSI_ST_CONTROL) { + /* Unsupported control code */ + /* Ignore everything until we see BEL or ESC \ */ + if (ansi_parser_state & ANSI_IN_STRING) { + if (!(ansi_parser_state & ANSI_BACKSLASH_SEEN)) { + if (utf8_codepoint == '"') { + ansi_parser_state &= ~ANSI_IN_STRING; + } else if (utf8_codepoint == '\\') { + ansi_parser_state |= ANSI_BACKSLASH_SEEN; + } + } else { + ansi_parser_state &= ~ANSI_BACKSLASH_SEEN; + } + } else { + if (utf8_codepoint == '\007' || (utf8_codepoint == '\\' && + (ansi_parser_state & ANSI_ESCAPE_SEEN))) { + /* End of sequence */ + ansi_parser_state = ANSI_NORMAL; + } else if (utf8_codepoint == '\033') { + /* Escape character */ + ansi_parser_state |= ANSI_ESCAPE_SEEN; + } else if (utf8_codepoint == '"') { + /* String starting */ + ansi_parser_state |= ANSI_IN_STRING; + ansi_parser_state &= ~ANSI_ESCAPE_SEEN; + ansi_parser_state &= ~ANSI_BACKSLASH_SEEN; + } else { + ansi_parser_state &= ~ANSI_ESCAPE_SEEN; + } + } + continue; + } else { + /* Inconsistent state */ + abort(); + } + + /* We wouldn't mind emitting utf-16 surrogate pairs. Too bad, the */ + /* windows console doesn't really support UTF-16, so just emit the */ + /* replacement character. */ + if (utf8_codepoint > 0xffff) { + utf8_codepoint = UNICODE_REPLACEMENT_CHARACTER; + } + + if (utf8_codepoint == 0x0a || utf8_codepoint == 0x0d) { + /* EOL conversion - emit \r\n, when we see either \r or \n. */ + /* If a \n immediately follows a \r or vice versa, ignore it. */ + if (previous_eol == 0 || utf8_codepoint == previous_eol) { + /* If there's no room in the utf16 buf, flush it first. */ + if (2 > ARRAY_SIZE(utf16_buf) - utf16_buf_used) { + uv_tty_emit_text(handle, utf16_buf, utf16_buf_used, error); + utf16_buf_used = 0; + } + + utf16_buf[utf16_buf_used++] = L'\r'; + utf16_buf[utf16_buf_used++] = L'\n'; + previous_eol = (char) utf8_codepoint; + } else { + /* Ignore this newline, but don't ignore later ones. */ + previous_eol = 0; + } + + } else if (utf8_codepoint <= 0xffff) { + /* Encode character into utf-16 buffer. */ + + /* If there's no room in the utf16 buf, flush it first. */ + if (1 > ARRAY_SIZE(utf16_buf) - utf16_buf_used) { + uv_tty_emit_text(handle, utf16_buf, utf16_buf_used, error); + utf16_buf_used = 0; + } + + utf16_buf[utf16_buf_used++] = (WCHAR) utf8_codepoint; + previous_eol = 0; + } + } + } + + /* Flush remaining characters */ + FLUSH_TEXT(); + + /* Copy cached values back to struct. */ + handle->utf8_bytes_left = utf8_bytes_left; + handle->utf8_codepoint = utf8_codepoint; + handle->previous_eol = previous_eol; + handle->ansi_parser_state = ansi_parser_state; + + LeaveCriticalSection(&uv_tty_output_lock); + + if (*error == STATUS_SUCCESS) { + return 0; + } else { + return -1; + } + +#undef FLUSH_TEXT +} + + +int uv_tty_write(uv_loop_t* loop, + uv_write_t* req, + uv_tty_t* handle, + const uv_buf_t bufs[], + unsigned int nbufs, + uv_write_cb cb) { + DWORD error; + + uv_req_init(loop, (uv_req_t*) req); + req->type = UV_WRITE; + req->handle = (uv_stream_t*) handle; + req->cb = cb; + + handle->reqs_pending++; + handle->write_reqs_pending++; + REGISTER_HANDLE_REQ(loop, handle, req); + + req->queued_bytes = 0; + + if (!uv_tty_write_bufs(handle, bufs, nbufs, &error)) { + SET_REQ_SUCCESS(req); + } else { + SET_REQ_ERROR(req, error); + } + + uv_insert_pending_req(loop, (uv_req_t*) req); + + return 0; +} + + +void uv_process_tty_write_req(uv_loop_t* loop, uv_tty_t* handle, + uv_write_t* req) { + int err; + + handle->write_queue_size -= req->queued_bytes; + UNREGISTER_HANDLE_REQ(loop, handle, req); + + if (req->cb) { + err = GET_REQ_ERROR(req); + req->cb(req, uv_translate_sys_error(err)); + } + + handle->write_reqs_pending--; + if (handle->shutdown_req != NULL && + handle->write_reqs_pending == 0) { + uv_want_endgame(loop, (uv_handle_t*)handle); + } + + DECREASE_PENDING_REQ_COUNT(handle); +} + + +void uv_tty_close(uv_tty_t* handle) { + CloseHandle(handle->handle); + + if (handle->flags & UV_HANDLE_READING) + uv_tty_read_stop(handle); + + handle->flags &= ~(UV_HANDLE_READABLE | UV_HANDLE_WRITABLE); + uv__handle_closing(handle); + + if (handle->reqs_pending == 0) { + uv_want_endgame(handle->loop, (uv_handle_t*) handle); + } +} + + +void uv_tty_endgame(uv_loop_t* loop, uv_tty_t* handle) { + if (!(handle->flags && UV_HANDLE_TTY_READABLE) && + handle->shutdown_req != NULL && + handle->write_reqs_pending == 0) { + UNREGISTER_HANDLE_REQ(loop, handle, handle->shutdown_req); + + /* TTY shutdown is really just a no-op */ + if (handle->shutdown_req->cb) { + if (handle->flags & UV__HANDLE_CLOSING) { + handle->shutdown_req->cb(handle->shutdown_req, UV_ECANCELED); + } else { + handle->shutdown_req->cb(handle->shutdown_req, 0); + } + } + + handle->shutdown_req = NULL; + + DECREASE_PENDING_REQ_COUNT(handle); + return; + } + + if (handle->flags & UV__HANDLE_CLOSING && + handle->reqs_pending == 0) { + /* The console handle duplicate used for line reading should be destroyed */ + /* by uv_tty_read_stop. */ + assert(!(handle->flags & UV_HANDLE_TTY_READABLE) || + handle->read_line_handle == NULL); + + /* The wait handle used for raw reading should be unregistered when the */ + /* wait callback runs. */ + assert(!(handle->flags & UV_HANDLE_TTY_READABLE) || + handle->read_raw_wait == NULL); + + assert(!(handle->flags & UV_HANDLE_CLOSED)); + uv__handle_close(handle); + } +} + + +/* TODO: remove me */ +void uv_process_tty_accept_req(uv_loop_t* loop, uv_tty_t* handle, + uv_req_t* raw_req) { + abort(); +} + + +/* TODO: remove me */ +void uv_process_tty_connect_req(uv_loop_t* loop, uv_tty_t* handle, + uv_connect_t* req) { + abort(); +} + + +int uv_tty_reset_mode(void) { + /* Not necessary to do anything. */ + return 0; +} |