* the more compatible.
*
* EL (Erase Line)
- * Sequence: ESC [ n K
- * Effect: if n is 0 or missing, clear from cursor to end of line
- * Effect: if n is 1, clear from beginning of line to cursor
- * Effect: if n is 2, clear entire line
+ * Sequence: ESC [ 0 K
+ * Effect: clear from cursor to end of line
*
* CUF (CUrsor Forward)
* Sequence: ESC [ n C
- * Effect: moves cursor forward of n chars
+ * Effect: moves cursor forward n chars
*
* CR (Carriage Return)
* Sequence: \r
* Sequence: ESC [ 6 n
* Effect: reports current cursor position as ESC [ NNN ; MMM R
*
+ * == Only used in multiline mode ==
+ * CUU (Cursor Up)
+ * Sequence: ESC [ n A
+ * Effect: moves cursor up n chars.
+ *
+ * CUD (Cursor Down)
+ * Sequence: ESC [ n B
+ * Effect: moves cursor down n chars.
+ *
* win32/console
* -------------
* If __MINGW32__ is defined, the win32 console API is used.
#else
#include <termios.h>
#include <sys/ioctl.h>
-#include <sys/poll.h>
+#include <poll.h>
#define USE_TERMIOS
#define HAVE_UNISTD_H
#endif
#include <stdlib.h>
#include <stdarg.h>
#include <stdio.h>
+#include <assert.h>
#include <errno.h>
#include <string.h>
+#include <signal.h>
#include <stdlib.h>
#include <sys/types.h>
#include "linenoise.h"
+#ifndef STRINGBUF_H
+#include "stringbuf.h"
+#endif
+#ifndef UTF8_UTIL_H
#include "utf8.h"
+#endif
#define LINENOISE_DEFAULT_HISTORY_MAX_LEN 100
-#define LINENOISE_MAX_LINE 4096
#define ctrl(C) ((C) - '@')
/* Use -ve numbers here to co-exist with normal unicode chars */
enum {
SPECIAL_NONE,
+ /* don't use -1 here since that indicates error */
SPECIAL_UP = -20,
SPECIAL_DOWN = -21,
SPECIAL_LEFT = -22,
SPECIAL_END = -26,
SPECIAL_INSERT = -27,
SPECIAL_PAGE_UP = -28,
- SPECIAL_PAGE_DOWN = -29
+ SPECIAL_PAGE_DOWN = -29,
+
+ /* Some handy names for other special keycodes */
+ CHAR_ESCAPE = 27,
+ CHAR_DELETE = 127,
};
static int history_max_len = LINENOISE_DEFAULT_HISTORY_MAX_LEN;
/* Structure to contain the status of the current (being edited) line */
struct current {
- char *buf; /* Current buffer. Always null terminated */
- int bufmax; /* Size of the buffer, including space for the null termination */
- int len; /* Number of bytes in 'buf' */
- int chars; /* Number of chars in 'buf' (utf-8 chars) */
+ stringbuf *buf; /* Current buffer. Always null terminated */
int pos; /* Cursor position, measured in chars */
int cols; /* Size of the window, in chars */
+ int nrows; /* How many rows are being used in multiline mode (>= 1) */
+ int rpos; /* The current row containing the cursor - multiline mode only */
+ int colsright; /* refreshLine() cached cols for insert_char() optimisation */
+ int colsleft; /* refreshLine() cached cols for remove_char() optimisation */
const char *prompt;
- char *capture; /* Allocated capture buffer, or NULL for none. Always null terminated */
+ stringbuf *capture; /* capture buffer, or NULL for none. Always null terminated */
+ stringbuf *output; /* used only during refreshLine() - output accumulator */
#if defined(USE_TERMIOS)
int fd; /* Terminal fd */
#elif defined(USE_WINCONSOLE)
int rows; /* Screen rows */
int x; /* Current column during output */
int y; /* Current row */
+#ifdef USE_UTF8
+ #define UBUF_MAX_CHARS 132
+ WORD ubuf[UBUF_MAX_CHARS + 1]; /* Accumulates utf16 output - one extra for final surrogate pairs */
+ int ubuflen; /* length used in ubuf */
+ int ubufcols; /* how many columns are represented by the chars in ubuf? */
+#endif
#endif
};
static int fd_read(struct current *current);
static int getWindowSize(struct current *current);
+static void cursorDown(struct current *current, int n);
+static void cursorUp(struct current *current, int n);
+static void eraseEol(struct current *current);
+static void refreshLine(struct current *current);
+static void refreshLineAlt(struct current *current, const char *prompt, const char *buf, int cursor_pos);
+static void setCursorPos(struct current *current, int x);
+static void setOutputHighlight(struct current *current, const int *props, int nprops);
+static void set_current(struct current *current, const char *str);
void linenoiseHistoryFree(void) {
if (history) {
}
}
+typedef enum {
+ EP_START, /* looking for ESC */
+ EP_ESC, /* looking for [ */
+ EP_DIGITS, /* parsing digits */
+ EP_PROPS, /* parsing digits or semicolons */
+ EP_END, /* ok */
+ EP_ERROR, /* error */
+} ep_state_t;
+
+struct esc_parser {
+ ep_state_t state;
+ int props[5]; /* properties are stored here */
+ int maxprops; /* size of the props[] array */
+ int numprops; /* number of properties found */
+ int termchar; /* terminator char, or 0 for any alpha */
+ int current; /* current (partial) property value */
+};
+
+/**
+ * Initialise the escape sequence parser at *parser.
+ *
+ * If termchar is 0 any alpha char terminates ok. Otherwise only the given
+ * char terminates successfully.
+ * Run the parser state machine with calls to parseEscapeSequence() for each char.
+ */
+static void initParseEscapeSeq(struct esc_parser *parser, int termchar)
+{
+ parser->state = EP_START;
+ parser->maxprops = sizeof(parser->props) / sizeof(*parser->props);
+ parser->numprops = 0;
+ parser->current = 0;
+ parser->termchar = termchar;
+}
+
+/**
+ * Pass character 'ch' into the state machine to parse:
+ * 'ESC' '[' <digits> (';' <digits>)* <termchar>
+ *
+ * The first character must be ESC.
+ * Returns the current state. The state machine is done when it returns either EP_END
+ * or EP_ERROR.
+ *
+ * On EP_END, the "property/attribute" values can be read from parser->props[]
+ * of length parser->numprops.
+ */
+static int parseEscapeSequence(struct esc_parser *parser, int ch)
+{
+ switch (parser->state) {
+ case EP_START:
+ parser->state = (ch == '\x1b') ? EP_ESC : EP_ERROR;
+ break;
+ case EP_ESC:
+ parser->state = (ch == '[') ? EP_DIGITS : EP_ERROR;
+ break;
+ case EP_PROPS:
+ if (ch == ';') {
+ parser->state = EP_DIGITS;
+donedigits:
+ if (parser->numprops + 1 < parser->maxprops) {
+ parser->props[parser->numprops++] = parser->current;
+ parser->current = 0;
+ }
+ break;
+ }
+ /* fall through */
+ case EP_DIGITS:
+ if (ch >= '0' && ch <= '9') {
+ parser->current = parser->current * 10 + (ch - '0');
+ parser->state = EP_PROPS;
+ break;
+ }
+ /* must be terminator */
+ if (parser->termchar != ch) {
+ if (parser->termchar != 0 || !((ch >= 'A' && ch <= 'Z') || (ch >= 'a' && ch <= 'z'))) {
+ parser->state = EP_ERROR;
+ break;
+ }
+ }
+ parser->state = EP_END;
+ goto donedigits;
+ case EP_END:
+ parser->state = EP_ERROR;
+ break;
+ case EP_ERROR:
+ break;
+ }
+ return parser->state;
+}
+
+/*#define DEBUG_REFRESHLINE*/
+
+#ifdef DEBUG_REFRESHLINE
+#define DRL(ARGS...) fprintf(dfh, ARGS)
+static FILE *dfh;
+
+static void DRL_CHAR(int ch)
+{
+ if (ch < ' ') {
+ DRL("^%c", ch + '@');
+ }
+ else if (ch > 127) {
+ DRL("\\u%04x", ch);
+ }
+ else {
+ DRL("%c", ch);
+ }
+}
+static void DRL_STR(const char *str)
+{
+ while (*str) {
+ int ch;
+ int n = utf8_tounicode(str, &ch);
+ str += n;
+ DRL_CHAR(ch);
+ }
+}
+#else
+#define DRL(...)
+#define DRL_CHAR(ch)
+#define DRL_STR(str)
+#endif
+
+#if defined(USE_WINCONSOLE)
+#include "linenoise-win32.c"
+#endif
+
#if defined(USE_TERMIOS)
static void linenoiseAtExit(void);
static struct termios orig_termios; /* in order to restore at exit */
static int rawmode = 0; /* for atexit() function to check if restore is needed*/
static int atexit_registered = 0; /* register atexit just 1 time */
-static const char *unsupported_term[] = {"dumb","cons25",NULL};
+static const char *unsupported_term[] = {"dumb","cons25","emacs",NULL};
static int isUnsupportedTerm(void) {
char *term = getenv("TERM");
/* input modes: no break, no CR to NL, no parity check, no strip char,
* no start/stop output control. */
raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
- /* output modes - disable post processing */
- raw.c_oflag &= ~(OPOST);
+ /* output modes - actually, no need to disable post processing */
+ /*raw.c_oflag &= ~(OPOST);*/
/* control modes - set 8 bit chars */
raw.c_cflag |= (CS8);
/* local modes - choing off, canonical off, no extended functions,
*/
#define IGNORE_RC(EXPR) if (EXPR) {}
-/* This is fdprintf() on some systems, but use a different
- * name to avoid conflicts
+/**
+ * Output bytes directly, or accumulate output (if current->output is set)
*/
-static void fd_printf(int fd, const char *format, ...)
+static void outputChars(struct current *current, const char *buf, int len)
+{
+ if (len < 0) {
+ len = strlen(buf);
+ }
+ if (current->output) {
+ sb_append_len(current->output, buf, len);
+ }
+ else {
+ IGNORE_RC(write(current->fd, buf, len));
+ }
+}
+
+/* Like outputChars, but using printf-style formatting
+ */
+static void outputFormatted(struct current *current, const char *format, ...)
{
va_list args;
char buf[64];
va_start(args, format);
n = vsnprintf(buf, sizeof(buf), format, args);
+ /* This will never happen because we are sure to use outputFormatted() only for short sequences */
+ assert(n < (int)sizeof(buf));
va_end(args);
- IGNORE_RC(write(fd, buf, n));
-}
-
-void linenoiseClearScreen(void)
-{
- fd_printf(STDOUT_FILENO, "\x1b[H\x1b[2J");
+ outputChars(current, buf, n);
}
static void cursorToLeft(struct current *current)
{
- fd_printf(current->fd, "\r");
-}
-
-static int outputChars(struct current *current, const char *buf, int len)
-{
- return write(current->fd, buf, len);
+ outputChars(current, "\r", -1);
}
-static void outputControlChar(struct current *current, char ch)
+static void setOutputHighlight(struct current *current, const int *props, int nprops)
{
- fd_printf(current->fd, "\x1b[7m^%c\x1b[0m", ch);
+ outputChars(current, "\x1b[", -1);
+ while (nprops--) {
+ outputFormatted(current, "%d%c", *props, (nprops == 0) ? 'm' : ';');
+ props++;
+ }
}
static void eraseEol(struct current *current)
{
- fd_printf(current->fd, "\x1b[0K");
+ outputChars(current, "\x1b[0K", -1);
}
static void setCursorPos(struct current *current, int x)
cursorToLeft(current);
}
else {
- fd_printf(current->fd, "\r\x1b[%dC", x);
+ outputFormatted(current, "\r\x1b[%dC", x);
}
}
+static void cursorUp(struct current *current, int n)
+{
+ if (n) {
+ outputFormatted(current, "\x1b[%dA", n);
+ }
+}
+
+static void cursorDown(struct current *current, int n)
+{
+ if (n) {
+ outputFormatted(current, "\x1b[%dB", n);
+ }
+}
+
+void linenoiseClearScreen(void)
+{
+ IGNORE_RC(write(STDOUT_FILENO, "\x1b[H\x1b[2J", 7));
+}
+
/**
* Reads a char from 'fd', waiting at most 'timeout' milliseconds.
*
static int fd_read(struct current *current)
{
#ifdef USE_UTF8
- char buf[4];
+ char buf[MAX_UTF8_LEN];
int n;
int i;
int c;
return -1;
}
n = utf8_charlen(buf[0]);
- if (n < 1 || n > 3) {
+ if (n < 1) {
return -1;
}
for (i = 1; i < n; i++) {
return -1;
}
}
- buf[n] = 0;
/* decode and return the character */
utf8_tounicode(buf, &c);
return c;
#endif
}
-static int countColorControlChars(const char* prompt)
-{
- /* ANSI color control sequences have the form:
- * "\x1b" "[" [0-9;]* "m"
- * We parse them with a simple state machine.
- */
-
- enum {
- search_esc,
- expect_bracket,
- expect_trail
- } state = search_esc;
- int len = 0, found = 0;
- char ch;
-
- /* XXX: Strictly we should be checking utf8 chars rather than
- * bytes in case of the extremely unlikely scenario where
- * an ANSI sequence is part of a utf8 sequence.
- */
- while ((ch = *prompt++) != 0) {
- switch (state) {
- case search_esc:
- if (ch == '\x1b') {
- state = expect_bracket;
- }
- break;
- case expect_bracket:
- if (ch == '[') {
- state = expect_trail;
- /* 3 for "\e[ ... m" */
- len = 3;
- break;
- }
- state = search_esc;
- break;
- case expect_trail:
- if ((ch == ';') || ((ch >= '0' && ch <= '9'))) {
- /* 0-9, or semicolon */
- len++;
- break;
- }
- if (ch == 'm') {
- found += len;
- }
- state = search_esc;
- break;
- }
- }
-
- return found;
-}
/**
* Stores the current cursor column in '*cols'.
* Returns 1 if OK, or 0 if failed to determine cursor pos.
*/
-static int queryCursor(int fd, int* cols)
+static int queryCursor(struct current *current, int* cols)
{
+ struct esc_parser parser;
+ int ch;
+
+ /* Should not be buffering this output, it needs to go immediately */
+ assert(current->output == NULL);
+
/* control sequence - report cursor location */
- fd_printf(fd, "\x1b[6n");
+ outputChars(current, "\x1b[6n", -1);
/* Parse the response: ESC [ rows ; cols R */
- if (fd_read_char(fd, 100) == 0x1b &&
- fd_read_char(fd, 100) == '[') {
-
- int n = 0;
- while (1) {
- int ch = fd_read_char(fd, 100);
- if (ch == ';') {
- /* Ignore rows */
- n = 0;
- }
- else if (ch == 'R') {
- /* Got cols */
- if (n != 0 && n < 1000) {
- *cols = n;
+ initParseEscapeSeq(&parser, 'R');
+ while ((ch = fd_read_char(current->fd, 100)) > 0) {
+ switch (parseEscapeSequence(&parser, ch)) {
+ default:
+ continue;
+ case EP_END:
+ if (parser.numprops == 2 && parser.props[1] < 1000) {
+ *cols = parser.props[1];
+ return 1;
}
break;
- }
- else if (ch >= 0 && ch <= '9') {
- n = n * 10 + ch - '0';
- }
- else {
+ case EP_ERROR:
break;
- }
}
- return 1;
+ /* failed */
+ break;
}
-
return 0;
}
if (current->cols == 0) {
int here;
+ /* If anything fails => default 80 */
current->cols = 80;
/* (a) */
- if (queryCursor (current->fd, &here)) {
+ if (queryCursor (current, &here)) {
/* (b) */
- fd_printf(current->fd, "\x1b[999C");
+ setCursorPos(current, 999);
/* (c). Note: If (a) succeeded, then (c) should as well.
* For paranoia we still check and have a fallback action
* for (d) in case of failure..
*/
- if (!queryCursor (current->fd, ¤t->cols)) {
- /* (d') Unable to get accurate position data, reset
- * the cursor to the far left. While this may not
- * restore the exact original position it should not
- * be too bad.
- */
- fd_printf(current->fd, "\r");
- } else {
+ if (queryCursor (current, ¤t->cols)) {
/* (d) Reset the cursor back to the original location. */
if (current->cols > here) {
- fd_printf(current->fd, "\x1b[%dD", current->cols - here);
+ setCursorPos(current, here);
}
}
- } /* 1st query failed, doing nothing => default 80 */
+ }
}
return 0;
}
/**
- * If escape (27) was received, reads subsequent
+ * If CHAR_ESCAPE was received, reads subsequent
* chars to determine if this is a known special key.
*
* Returns SPECIAL_NONE if unrecognised, or -1 if EOF.
*
* If no additional char is received within a short time,
- * 27 is returned.
+ * CHAR_ESCAPE is returned.
*/
static int check_special(int fd)
{
int c2;
if (c < 0) {
- return 27;
+ return CHAR_ESCAPE;
}
c2 = fd_read_char(fd, 50);
return SPECIAL_NONE;
}
-#elif defined(USE_WINCONSOLE)
+#endif
-static DWORD orig_consolemode = 0;
+static void clearOutputHighlight(struct current *current)
+{
+ int nohighlight = 0;
+ setOutputHighlight(current, &nohighlight, 1);
+}
-static int enableRawMode(struct current *current) {
- DWORD n;
- INPUT_RECORD irec;
+static void outputControlChar(struct current *current, char ch)
+{
+ int reverse = 7;
+ setOutputHighlight(current, &reverse, 1);
+ outputChars(current, "^", 1);
+ outputChars(current, &ch, 1);
+ clearOutputHighlight(current);
+}
- current->outh = GetStdHandle(STD_OUTPUT_HANDLE);
- current->inh = GetStdHandle(STD_INPUT_HANDLE);
+#ifndef utf8_getchars
+static int utf8_getchars(char *buf, int c)
+{
+#ifdef USE_UTF8
+ return utf8_fromunicode(buf, c);
+#else
+ *buf = c;
+ return 1;
+#endif
+}
+#endif
- if (!PeekConsoleInput(current->inh, &irec, 1, &n)) {
- return -1;
- }
- if (getWindowSize(current) != 0) {
- return -1;
- }
- if (GetConsoleMode(current->inh, &orig_consolemode)) {
- SetConsoleMode(current->inh, ENABLE_PROCESSED_INPUT);
+/**
+ * Returns the unicode character at the given offset,
+ * or -1 if none.
+ */
+static int get_char(struct current *current, int pos)
+{
+ if (pos >= 0 && pos < sb_chars(current->buf)) {
+ int c;
+ int i = utf8_index(sb_str(current->buf), pos);
+ (void)utf8_tounicode(sb_str(current->buf) + i, &c);
+ return c;
}
- return 0;
+ return -1;
}
-static void disableRawMode(struct current *current)
+static int char_display_width(int ch)
{
- SetConsoleMode(current->inh, orig_consolemode);
+ if (ch < ' ') {
+ /* control chars take two positions */
+ return 2;
+ }
+ else {
+ return utf8_width(ch);
+ }
}
-void linenoiseClearScreen(void)
-{
- HANDLE fh = GetStdHandle(STD_OUTPUT_HANDLE);
+#ifndef NO_COMPLETION
+static linenoiseCompletionCallback *completionCallback = NULL;
+static void *completionUserdata = NULL;
+static int showhints = 1;
+static linenoiseHintsCallback *hintsCallback = NULL;
+static linenoiseFreeHintsCallback *freeHintsCallback = NULL;
+static void *hintsUserdata = NULL;
- COORD topleft = { 0, 0 };
- DWORD n;
+static void beep() {
+#ifdef USE_TERMIOS
+ fprintf(stderr, "\x7");
+ fflush(stderr);
+#endif
+}
- FillConsoleOutputCharacter(fh, ' ',
- current->cols * current->rows, topleft, &n);
- FillConsoleOutputAttribute(fh,
- FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_GREEN,
- current->cols * current->rows, topleft, &n);
- SetConsoleCursorPosition(fh, topleft);
+static void freeCompletions(linenoiseCompletions *lc) {
+ size_t i;
+ for (i = 0; i < lc->len; i++)
+ free(lc->cvec[i]);
+ free(lc->cvec);
}
-static void cursorToLeft(struct current *current)
-{
- COORD pos;
- DWORD n;
+static int completeLine(struct current *current) {
+ linenoiseCompletions lc = { 0, NULL };
+ int c = 0;
- pos.X = 0;
- pos.Y = (SHORT)current->y;
+ completionCallback(sb_str(current->buf),&lc,completionUserdata);
+ if (lc.len == 0) {
+ beep();
+ } else {
+ size_t stop = 0, i = 0;
- FillConsoleOutputAttribute(current->outh,
- FOREGROUND_RED | FOREGROUND_BLUE | FOREGROUND_GREEN, current->cols, pos, &n);
- current->x = 0;
-}
+ while(!stop) {
+ /* Show completion or original buffer */
+ if (i < lc.len) {
+ int chars = utf8_strlen(lc.cvec[i], -1);
+ refreshLineAlt(current, current->prompt, lc.cvec[i], chars);
+ } else {
+ refreshLine(current);
+ }
-static int outputChars(struct current *current, const char *buf, int len)
-{
- COORD pos;
- DWORD n;
+ c = fd_read(current);
+ if (c == -1) {
+ break;
+ }
- pos.X = (SHORT)current->x;
- pos.Y = (SHORT)current->y;
+ switch(c) {
+ case '\t': /* tab */
+ i = (i+1) % (lc.len+1);
+ if (i == lc.len) beep();
+ break;
+ case CHAR_ESCAPE: /* escape */
+ /* Re-show original buffer */
+ if (i < lc.len) {
+ refreshLine(current);
+ }
+ stop = 1;
+ break;
+ default:
+ /* Update buffer and return */
+ if (i < lc.len) {
+ set_current(current,lc.cvec[i]);
+ }
+ stop = 1;
+ break;
+ }
+ }
+ }
- WriteConsoleOutputCharacter(current->outh, buf, len, pos, &n);
- current->x += len;
- return 0;
+ freeCompletions(&lc);
+ return c; /* Return last read character */
}
-static void outputControlChar(struct current *current, char ch)
-{
- COORD pos;
- DWORD n;
-
- pos.X = (SHORT) current->x;
- pos.Y = (SHORT) current->y;
+/* Register a callback function to be called for tab-completion.
+ Returns the prior callback so that the caller may (if needed)
+ restore it when done. */
+linenoiseCompletionCallback * linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn, void *userdata) {
+ linenoiseCompletionCallback * old = completionCallback;
+ completionCallback = fn;
+ completionUserdata = userdata;
+ return old;
+}
- FillConsoleOutputAttribute(current->outh, BACKGROUND_INTENSITY, 2, pos, &n);
- outputChars(current, "^", 1);
- outputChars(current, &ch, 1);
+void linenoiseAddCompletion(linenoiseCompletions *lc, const char *str) {
+ lc->cvec = (char **)realloc(lc->cvec,sizeof(char*)*(lc->len+1));
+ lc->cvec[lc->len++] = strdup(str);
}
-static void eraseEol(struct current *current)
+void linenoiseSetHintsCallback(linenoiseHintsCallback *callback, void *userdata)
{
- COORD pos;
- DWORD n;
-
- pos.X = (SHORT) current->x;
- pos.Y = (SHORT) current->y;
-
- FillConsoleOutputCharacter(current->outh, ' ', current->cols - current->x, pos, &n);
+ hintsCallback = callback;
+ hintsUserdata = userdata;
}
-static void setCursorPos(struct current *current, int x)
+void linenoiseSetFreeHintsCallback(linenoiseFreeHintsCallback *callback)
{
- COORD pos;
+ freeHintsCallback = callback;
+}
- pos.X = (SHORT)x;
- pos.Y = (SHORT) current->y;
+#endif
- SetConsoleCursorPosition(current->outh, pos);
- current->x = x;
-}
-static int fd_read(struct current *current)
+static const char *reduceSingleBuf(const char *buf, int availcols, int *cursor_pos)
{
- while (1) {
- INPUT_RECORD irec;
- DWORD n;
- if (WaitForSingleObject(current->inh, INFINITE) != WAIT_OBJECT_0) {
- break;
+ /* We have availcols columns available.
+ * If necessary, strip chars off the front of buf until *cursor_pos
+ * fits within availcols
+ */
+ int needcols = 0;
+ int pos = 0;
+ int new_cursor_pos = *cursor_pos;
+ const char *pt = buf;
+
+ DRL("reduceSingleBuf: availcols=%d, cursor_pos=%d\n", availcols, *cursor_pos);
+
+ while (*pt) {
+ int ch;
+ int n = utf8_tounicode(pt, &ch);
+ pt += n;
+
+ needcols += char_display_width(ch);
+
+ /* If we need too many cols, strip
+ * chars off the front of buf to make it fit.
+ * We keep 3 extra cols to the right of the cursor.
+ * 2 for possible wide chars, 1 for the last column that
+ * can't be used.
+ */
+ while (needcols >= availcols - 3) {
+ n = utf8_tounicode(buf, &ch);
+ buf += n;
+ needcols -= char_display_width(ch);
+ DRL_CHAR(ch);
+
+ /* and adjust the apparent cursor position */
+ new_cursor_pos--;
+
+ if (buf == pt) {
+ /* can't remove more than this */
+ break;
+ }
}
- if (!ReadConsoleInput (current->inh, &irec, 1, &n)) {
+
+ if (pos++ == *cursor_pos) {
break;
}
- if (irec.EventType == KEY_EVENT && irec.Event.KeyEvent.bKeyDown) {
- KEY_EVENT_RECORD *k = &irec.Event.KeyEvent;
- if (k->dwControlKeyState & ENHANCED_KEY) {
- switch (k->wVirtualKeyCode) {
- case VK_LEFT:
- return SPECIAL_LEFT;
- case VK_RIGHT:
- return SPECIAL_RIGHT;
- case VK_UP:
- return SPECIAL_UP;
- case VK_DOWN:
- return SPECIAL_DOWN;
- case VK_INSERT:
- return SPECIAL_INSERT;
- case VK_DELETE:
- return SPECIAL_DELETE;
- case VK_HOME:
- return SPECIAL_HOME;
- case VK_END:
- return SPECIAL_END;
- case VK_PRIOR:
- return SPECIAL_PAGE_UP;
- case VK_NEXT:
- return SPECIAL_PAGE_DOWN;
- }
- }
- /* Note that control characters are already translated in AsciiChar */
- else if (k->wVirtualKeyCode == VK_CONTROL)
- continue;
- else {
-#ifdef USE_UTF8
- return k->uChar.UnicodeChar;
-#else
- return k->uChar.AsciiChar;
-#endif
- }
- }
+
}
- return -1;
+ DRL("<snip>");
+ DRL_STR(buf);
+ DRL("\nafter reduce, needcols=%d, new_cursor_pos=%d\n", needcols, new_cursor_pos);
+
+ /* Done, now new_cursor_pos contains the adjusted cursor position
+ * and buf points to he adjusted start
+ */
+ *cursor_pos = new_cursor_pos;
+ return buf;
}
-static int countColorControlChars(const char* prompt)
+static int mlmode = 0;
+
+void linenoiseSetMultiLine(int enableml)
{
- /* For windows we assume that there are no embedded ansi color
- * control sequences.
- */
- return 0;
+ mlmode = enableml;
}
-static int getWindowSize(struct current *current)
+/* Helper of refreshSingleLine() and refreshMultiLine() to show hints
+ * to the right of the prompt.
+ * Returns 1 if a hint was shown, or 0 if not
+ * If 'display' is 0, does no output. Just returns the appropriate return code.
+ */
+static int refreshShowHints(struct current *current, const char *buf, int availcols, int display)
{
- CONSOLE_SCREEN_BUFFER_INFO info;
- if (!GetConsoleScreenBufferInfo(current->outh, &info)) {
- return -1;
- }
- current->cols = info.dwSize.X;
- current->rows = info.dwSize.Y;
- if (current->cols <= 0 || current->rows <= 0) {
- current->cols = 80;
- return -1;
+ int rc = 0;
+ if (showhints && hintsCallback && availcols > 0) {
+ int bold = 0;
+ int color = -1;
+ char *hint = hintsCallback(buf, &color, &bold, hintsUserdata);
+ if (hint) {
+ rc = 1;
+ if (display) {
+ const char *pt;
+ if (bold == 1 && color == -1) color = 37;
+ if (bold || color > 0) {
+ int props[3] = { bold, color, 49 }; /* bold, color, fgnormal */
+ setOutputHighlight(current, props, 3);
+ }
+ DRL("<hint bold=%d,color=%d>", bold, color);
+ pt = hint;
+ while (*pt) {
+ int ch;
+ int n = utf8_tounicode(pt, &ch);
+ int width = char_display_width(ch);
+
+ if (width >= availcols) {
+ DRL("<hinteol>");
+ break;
+ }
+ DRL_CHAR(ch);
+
+ availcols -= width;
+ outputChars(current, pt, n);
+ pt += n;
+ }
+ if (bold || color > 0) {
+ clearOutputHighlight(current);
+ }
+ /* Call the function to free the hint returned. */
+ if (freeHintsCallback) freeHintsCallback(hint, hintsUserdata);
+ }
+ }
}
- current->y = info.dwCursorPosition.Y;
- current->x = info.dwCursorPosition.X;
- return 0;
+ return rc;
+}
+
+#ifdef USE_TERMIOS
+static void refreshStart(struct current *current)
+{
+ /* We accumulate all output here */
+ assert(current->output == NULL);
+ current->output = sb_alloc();
+}
+
+static void refreshEnd(struct current *current)
+{
+ /* Output everything at once */
+ IGNORE_RC(write(current->fd, sb_str(current->output), sb_len(current->output)));
+ sb_free(current->output);
+ current->output = NULL;
}
-#endif
-static int utf8_getchars(char *buf, int c)
+static void refreshStartChars(struct current *current)
{
-#ifdef USE_UTF8
- return utf8_fromunicode(buf, c);
-#else
- *buf = c;
- return 1;
-#endif
+ (void)current;
}
-/**
- * Returns the unicode character at the given offset,
- * or -1 if none.
- */
-static int get_char(struct current *current, int pos)
+static void refreshNewline(struct current *current)
{
- if (pos >= 0 && pos < current->chars) {
- int c;
- int i = utf8_index(current->buf, pos);
- (void)utf8_tounicode(current->buf + i, &c);
- return c;
- }
- return -1;
+ DRL("<nl>");
+ outputChars(current, "\n", 1);
+}
+
+static void refreshEndChars(struct current *current)
+{
+ (void)current;
}
+#endif
-static void refreshLine(const char *prompt, struct current *current)
+static void refreshLineAlt(struct current *current, const char *prompt, const char *buf, int cursor_pos)
{
- int plen;
- int pchars;
- int backup = 0;
int i;
- const char *buf = current->buf;
- int chars = current->chars;
- int pos = current->pos;
- int b;
- int ch;
- int n;
+ const char *pt;
+ int displaycol;
+ int displayrow;
+ int visible;
+ int currentpos;
+ int notecursor;
+ int cursorcol = 0;
+ int cursorrow = 0;
+ int hint;
+ struct esc_parser parser;
+
+#ifdef DEBUG_REFRESHLINE
+ dfh = fopen("linenoise.debuglog", "a");
+#endif
/* Should intercept SIGWINCH. For now, just get the size every time */
getWindowSize(current);
- plen = strlen(prompt);
- pchars = utf8_strlen(prompt, plen);
+ refreshStart(current);
- /* Scan the prompt for embedded ansi color control sequences and
- * discount them as characters/columns.
- */
- pchars -= countColorControlChars(prompt);
+ DRL("wincols=%d, cursor_pos=%d, nrows=%d, rpos=%d\n", current->cols, cursor_pos, current->nrows, current->rpos);
- /* Account for a line which is too long to fit in the window.
- * Note that control chars require an extra column
+ /* Here is the plan:
+ * (a) move the the bottom row, going down the appropriate number of lines
+ * (b) move to beginning of line and erase the current line
+ * (c) go up one line and do the same, until we have erased up to the first row
+ * (d) output the prompt, counting cols and rows, taking into account escape sequences
+ * (e) output the buffer, counting cols and rows
+ * (e') when we hit the current pos, save the cursor position
+ * (f) move the cursor to the saved cursor position
+ * (g) save the current cursor row and number of rows
*/
- /* How many cols are required to the left of 'pos'?
- * The prompt, plus one extra for each control char
- */
- n = pchars + utf8_strlen(buf, current->len);
- b = 0;
- for (i = 0; i < pos; i++) {
- b += utf8_tounicode(buf + b, &ch);
- if (ch < ' ') {
- n++;
+ /* (a) - The cursor is currently at row rpos */
+ cursorDown(current, current->nrows - current->rpos - 1);
+ DRL("<cud=%d>", current->nrows - current->rpos - 1);
+
+ /* (b), (c) - Erase lines upwards until we get to the first row */
+ for (i = 0; i < current->nrows; i++) {
+ if (i) {
+ DRL("<cup>");
+ cursorUp(current, 1);
}
+ DRL("<clearline>");
+ cursorToLeft(current);
+ eraseEol(current);
}
+ DRL("\n");
- /* If too many are needed, strip chars off the front of 'buf'
- * until it fits. Note that if the current char is a control character,
- * we need one extra col.
- */
- if (current->pos < current->chars && get_char(current, current->pos) < ' ') {
- n++;
- }
+ /* (d) First output the prompt. control sequences don't take up display space */
+ pt = prompt;
+ displaycol = 0; /* current display column */
+ displayrow = 0; /* current display row */
+ visible = 1;
- while (n >= current->cols && pos > 0) {
- b = utf8_tounicode(buf, &ch);
- if (ch < ' ') {
- n--;
+ refreshStartChars(current);
+
+ while (*pt) {
+ int width;
+ int ch;
+ int n = utf8_tounicode(pt, &ch);
+
+ if (visible && ch == CHAR_ESCAPE) {
+ /* The start of an escape sequence, so not visible */
+ visible = 0;
+ initParseEscapeSeq(&parser, 'm');
+ DRL("<esc-seq-start>");
+ }
+
+ if (ch == '\n' || ch == '\r') {
+ /* treat both CR and NL the same and force wrap */
+ refreshNewline(current);
+ displaycol = 0;
+ displayrow++;
+ }
+ else {
+ width = visible * utf8_width(ch);
+
+ displaycol += width;
+ if (displaycol >= current->cols) {
+ /* need to wrap to the next line because of newline or if it doesn't fit
+ * XXX this is a problem in single line mode
+ */
+ refreshNewline(current);
+ displaycol = width;
+ displayrow++;
+ }
+
+ DRL_CHAR(ch);
+#ifdef USE_WINCONSOLE
+ if (visible) {
+ outputChars(current, pt, n);
+ }
+#else
+ outputChars(current, pt, n);
+#endif
+ }
+ pt += n;
+
+ if (!visible) {
+ switch (parseEscapeSequence(&parser, ch)) {
+ case EP_END:
+ visible = 1;
+ setOutputHighlight(current, parser.props, parser.numprops);
+ DRL("<esc-seq-end,numprops=%d>", parser.numprops);
+ break;
+ case EP_ERROR:
+ DRL("<esc-seq-err>");
+ visible = 1;
+ break;
+ }
}
- n--;
- buf += b;
- pos--;
- chars--;
}
- /* Cursor to left edge, then the prompt */
- cursorToLeft(current);
- outputChars(current, prompt, plen);
+ /* Now we are at the first line with all lines erased */
+ DRL("\nafter prompt: displaycol=%d, displayrow=%d\n", displaycol, displayrow);
- /* Now the current buffer content */
- /* Need special handling for control characters.
- * If we hit 'cols', stop.
- */
- b = 0; /* unwritted bytes */
- n = 0; /* How many control chars were written */
- for (i = 0; i < chars; i++) {
+ /* (e) output the buffer, counting cols and rows */
+ if (mlmode == 0) {
+ /* In this mode we may need to trim chars from the start of the buffer until the
+ * cursor fits in the window.
+ */
+ pt = reduceSingleBuf(buf, current->cols - displaycol, &cursor_pos);
+ }
+ else {
+ pt = buf;
+ }
+
+ currentpos = 0;
+ notecursor = -1;
+
+ while (*pt) {
int ch;
- int w = utf8_tounicode(buf + b, &ch);
- if (ch < ' ') {
- n++;
+ int n = utf8_tounicode(pt, &ch);
+ int width = char_display_width(ch);
+
+ if (currentpos == cursor_pos) {
+ /* (e') wherever we output this character is where we want the cursor */
+ notecursor = 1;
}
- if (pchars + i + n >= current->cols) {
- break;
+
+ if (displaycol + width >= current->cols) {
+ if (mlmode == 0) {
+ /* In single line mode stop once we print as much as we can on one line */
+ DRL("<slmode>");
+ break;
+ }
+ /* need to wrap to the next line since it doesn't fit */
+ refreshNewline(current);
+ displaycol = 0;
+ displayrow++;
+ }
+
+ if (notecursor == 1) {
+ /* (e') Save this position as the current cursor position */
+ cursorcol = displaycol;
+ cursorrow = displayrow;
+ notecursor = 0;
+ DRL("<cursor>");
}
+
+ displaycol += width;
+
if (ch < ' ') {
- /* A control character, so write the buffer so far */
- outputChars(current, buf, b);
- buf += b + w;
- b = 0;
outputControlChar(current, ch + '@');
- if (i < pos) {
- backup++;
- }
}
else {
- b += w;
+ outputChars(current, pt, n);
}
+ DRL_CHAR(ch);
+ if (width != 1) {
+ DRL("<w=%d>", width);
+ }
+
+ pt += n;
+ currentpos++;
+ }
+
+ /* If we didn't see the cursor, it is at the current location */
+ if (notecursor) {
+ DRL("<cursor>");
+ cursorcol = displaycol;
+ cursorrow = displayrow;
+ }
+
+ DRL("\nafter buf: displaycol=%d, displayrow=%d, cursorcol=%d, cursorrow=%d\n", displaycol, displayrow, cursorcol, cursorrow);
+
+ /* (f) show hints */
+ hint = refreshShowHints(current, buf, current->cols - displaycol, 1);
+
+ /* Remember how many many cols are available for insert optimisation */
+ if (prompt == current->prompt && hint == 0) {
+ current->colsright = current->cols - displaycol;
+ current->colsleft = displaycol;
+ }
+ else {
+ /* Can't optimise */
+ current->colsright = 0;
+ current->colsleft = 0;
}
- outputChars(current, buf, b);
+ DRL("\nafter hints: colsleft=%d, colsright=%d\n\n", current->colsleft, current->colsright);
- /* Erase to right, move cursor to original position */
- eraseEol(current);
- setCursorPos(current, pos + pchars + backup);
+ refreshEndChars(current);
+
+ /* (g) move the cursor to the correct place */
+ cursorUp(current, displayrow - cursorrow);
+ setCursorPos(current, cursorcol);
+
+ /* (h) Update the number of rows if larger, but never reduce this */
+ if (displayrow >= current->nrows) {
+ current->nrows = displayrow + 1;
+ }
+ /* And remember the row that the cursor is on */
+ current->rpos = cursorrow;
+
+ refreshEnd(current);
+
+#ifdef DEBUG_REFRESHLINE
+ fclose(dfh);
+#endif
}
-static void set_current(struct current *current, const char *str)
+static void refreshLine(struct current *current)
{
- strncpy(current->buf, str, current->bufmax);
- current->buf[current->bufmax - 1] = 0;
- current->len = strlen(current->buf);
- current->pos = current->chars = utf8_strlen(current->buf, current->len);
+ refreshLineAlt(current, current->prompt, sb_str(current->buf), current->pos);
}
-static int has_room(struct current *current, int bytes)
+static void set_current(struct current *current, const char *str)
{
- return current->len + bytes < current->bufmax - 1;
+ sb_clear(current->buf);
+ sb_append(current->buf, str);
+ current->pos = sb_chars(current->buf);
}
/**
*/
static int remove_char(struct current *current, int pos)
{
- if (pos >= 0 && pos < current->chars) {
- int p1, p2;
- int ret = 1;
- p1 = utf8_index(current->buf, pos);
- p2 = p1 + utf8_index(current->buf + p1, 1);
-
-#ifdef USE_TERMIOS
- /* optimise remove char in the case of removing the last char */
- if (current->pos == pos + 1 && current->pos == current->chars) {
- if (current->buf[pos] >= ' ' && utf8_strlen(current->prompt, -1) + utf8_strlen(current->buf, current->len) < current->cols - 1) {
- ret = 2;
- fd_printf(current->fd, "\b \b");
+ if (pos >= 0 && pos < sb_chars(current->buf)) {
+ int offset = utf8_index(sb_str(current->buf), pos);
+ int nbytes = utf8_index(sb_str(current->buf) + offset, 1);
+ int rc = 1;
+
+ /* Now we try to optimise in the simple but very common case that:
+ * - outputChars() can be used directly (not win32)
+ * - we are removing the char at EOL
+ * - the buffer is not empty
+ * - there are columns available to the left
+ * - the char being deleted is not a wide or utf-8 character
+ * - no hints are being shown
+ */
+ if (current->output && current->pos == pos + 1 && current->pos == sb_chars(current->buf) && pos > 0) {
+#ifdef USE_UTF8
+ /* Could implement utf8_prev_len() but simplest just to not optimise this case */
+ char last = sb_str(current->buf)[offset];
+#else
+ char last = 0;
+#endif
+ if (current->colsleft > 0 && (last & 0x80) == 0) {
+ /* Have cols on the left and not a UTF-8 char or continuation */
+ /* Yes, can optimise */
+ current->colsleft--;
+ current->colsright++;
+ rc = 2;
}
}
-#endif
- /* Move the null char too */
- memmove(current->buf + p1, current->buf + p2, current->len - p2 + 1);
- current->len -= (p2 - p1);
- current->chars--;
+ sb_delete(current->buf, offset, nbytes);
if (current->pos > pos) {
current->pos--;
}
- return ret;
+ if (rc == 2) {
+ if (refreshShowHints(current, sb_str(current->buf), current->colsright, 0)) {
+ /* A hint needs to be shown, so can't optimise after all */
+ rc = 1;
+ }
+ else {
+ /* optimised output */
+ outputChars(current, "\b \b", 3);
+ }
+ }
+ return rc;
+ return 1;
}
return 0;
}
*/
static int insert_char(struct current *current, int pos, int ch)
{
- char buf[3];
- int n = utf8_getchars(buf, ch);
-
- if (has_room(current, n) && pos >= 0 && pos <= current->chars) {
- int p1, p2;
- int ret = 1;
- p1 = utf8_index(current->buf, pos);
- p2 = p1 + n;
-
-#ifdef USE_TERMIOS
- /* optimise the case where adding a single char to the end and no scrolling is needed */
- if (current->pos == pos && current->chars == pos) {
- if (ch >= ' ' && utf8_strlen(current->prompt, -1) + utf8_strlen(current->buf, current->len) < current->cols - 1) {
- IGNORE_RC(write(current->fd, buf, n));
- ret = 2;
+ if (pos >= 0 && pos <= sb_chars(current->buf)) {
+ char buf[MAX_UTF8_LEN + 1];
+ int offset = utf8_index(sb_str(current->buf), pos);
+ int n = utf8_getchars(buf, ch);
+ int rc = 1;
+
+ /* null terminate since sb_insert() requires it */
+ buf[n] = 0;
+
+ /* Now we try to optimise in the simple but very common case that:
+ * - outputChars() can be used directly (not win32)
+ * - we are inserting at EOL
+ * - there are enough columns available
+ * - no hints are being shown
+ */
+ if (current->output && pos == current->pos && pos == sb_chars(current->buf)) {
+ int width = char_display_width(ch);
+ if (current->colsright > width) {
+ /* Yes, can optimise */
+ current->colsright -= width;
+ current->colsleft -= width;
+ rc = 2;
}
}
-#endif
-
- memmove(current->buf + p2, current->buf + p1, current->len - p1);
- memcpy(current->buf + p1, buf, n);
- current->len += n;
-
- current->chars++;
+ sb_insert(current->buf, offset, buf);
if (current->pos >= pos) {
current->pos++;
}
- return ret;
+ if (rc == 2) {
+ if (refreshShowHints(current, sb_str(current->buf), current->colsright, 0)) {
+ /* A hint needs to be shown, so can't optimise after all */
+ rc = 1;
+ }
+ else {
+ /* optimised output */
+ outputChars(current, buf, n);
+ }
+ }
+ return rc;
}
return 0;
}
*
* This replaces any existing characters in the cut buffer.
*/
-static void capture_chars(struct current *current, int pos, int n)
+static void capture_chars(struct current *current, int pos, int nchars)
{
- if (pos >= 0 && (pos + n - 1) < current->chars) {
- int p1 = utf8_index(current->buf, pos);
- int nbytes = utf8_index(current->buf + p1, n);
-
- if (nbytes) {
- free(current->capture);
- /* Include space for the null terminator */
- current->capture = (char *)malloc(nbytes + 1);
- memcpy(current->capture, current->buf + p1, nbytes);
- current->capture[nbytes] = '\0';
+ if (pos >= 0 && (pos + nchars - 1) < sb_chars(current->buf)) {
+ int offset = utf8_index(sb_str(current->buf), pos);
+ int nbytes = utf8_index(sb_str(current->buf) + offset, nchars);
+
+ if (nbytes > 0) {
+ if (current->capture) {
+ sb_clear(current->capture);
+ }
+ else {
+ current->capture = sb_alloc();
+ }
+ sb_append_len(current->capture, sb_str(current->buf) + offset, nbytes);
}
}
}
return inserted;
}
-#ifndef NO_COMPLETION
-static linenoiseCompletionCallback *completionCallback = NULL;
+/**
+ * Returns the keycode to process, or 0 if none.
+ */
+static int reverseIncrementalSearch(struct current *current)
+{
+ /* Display the reverse-i-search prompt and process chars */
+ char rbuf[50];
+ char rprompt[80];
+ int rchars = 0;
+ int rlen = 0;
+ int searchpos = history_len - 1;
+ int c;
-static void beep() {
+ rbuf[0] = 0;
+ while (1) {
+ int n = 0;
+ const char *p = NULL;
+ int skipsame = 0;
+ int searchdir = -1;
+
+ snprintf(rprompt, sizeof(rprompt), "(reverse-i-search)'%s': ", rbuf);
+ refreshLineAlt(current, rprompt, sb_str(current->buf), current->pos);
+ c = fd_read(current);
+ if (c == ctrl('H') || c == CHAR_DELETE) {
+ if (rchars) {
+ int p_ind = utf8_index(rbuf, --rchars);
+ rbuf[p_ind] = 0;
+ rlen = strlen(rbuf);
+ }
+ continue;
+ }
#ifdef USE_TERMIOS
- fprintf(stderr, "\x7");
- fflush(stderr);
+ if (c == CHAR_ESCAPE) {
+ c = check_special(current->fd);
+ }
#endif
-}
-
-static void freeCompletions(linenoiseCompletions *lc) {
- size_t i;
- for (i = 0; i < lc->len; i++)
- free(lc->cvec[i]);
- free(lc->cvec);
-}
-
-static int completeLine(struct current *current) {
- linenoiseCompletions lc = { 0, NULL };
- int c = 0;
+ if (c == ctrl('P') || c == SPECIAL_UP) {
+ /* Search for the previous (earlier) match */
+ if (searchpos > 0) {
+ searchpos--;
+ }
+ skipsame = 1;
+ }
+ else if (c == ctrl('N') || c == SPECIAL_DOWN) {
+ /* Search for the next (later) match */
+ if (searchpos < history_len) {
+ searchpos++;
+ }
+ searchdir = 1;
+ skipsame = 1;
+ }
+ else if (c >= ' ') {
+ /* >= here to allow for null terminator */
+ if (rlen >= (int)sizeof(rbuf) - MAX_UTF8_LEN) {
+ continue;
+ }
- completionCallback(current->buf,&lc);
- if (lc.len == 0) {
- beep();
- } else {
- size_t stop = 0, i = 0;
+ n = utf8_getchars(rbuf + rlen, c);
+ rlen += n;
+ rchars++;
+ rbuf[rlen] = 0;
- while(!stop) {
- /* Show completion or original buffer */
- if (i < lc.len) {
- struct current tmp = *current;
- tmp.buf = lc.cvec[i];
- tmp.pos = tmp.len = strlen(tmp.buf);
- tmp.chars = utf8_strlen(tmp.buf, tmp.len);
- refreshLine(current->prompt, &tmp);
- } else {
- refreshLine(current->prompt, current);
- }
+ /* Adding a new char resets the search location */
+ searchpos = history_len - 1;
+ }
+ else {
+ /* Exit from incremental search mode */
+ break;
+ }
- c = fd_read(current);
- if (c == -1) {
+ /* Now search through the history for a match */
+ for (; searchpos >= 0 && searchpos < history_len; searchpos += searchdir) {
+ p = strstr(history[searchpos], rbuf);
+ if (p) {
+ /* Found a match */
+ if (skipsame && strcmp(history[searchpos], sb_str(current->buf)) == 0) {
+ /* But it is identical, so skip it */
+ continue;
+ }
+ /* Copy the matching line and set the cursor position */
+ set_current(current,history[searchpos]);
+ current->pos = utf8_strlen(history[searchpos], p - history[searchpos]);
break;
}
-
- switch(c) {
- case '\t': /* tab */
- i = (i+1) % (lc.len+1);
- if (i == lc.len) beep();
- break;
- case 27: /* escape */
- /* Re-show original buffer */
- if (i < lc.len) {
- refreshLine(current->prompt, current);
- }
- stop = 1;
- break;
- default:
- /* Update buffer and return */
- if (i < lc.len) {
- set_current(current,lc.cvec[i]);
- }
- stop = 1;
- break;
- }
+ }
+ if (!p && n) {
+ /* No match, so don't add it */
+ rchars--;
+ rlen -= n;
+ rbuf[rlen] = 0;
}
}
+ if (c == ctrl('G') || c == ctrl('C')) {
+ /* ctrl-g terminates the search with no effect */
+ set_current(current, "");
+ c = 0;
+ }
+ else if (c == ctrl('J')) {
+ /* ctrl-j terminates the search leaving the buffer in place */
+ c = 0;
+ }
- freeCompletions(&lc);
- return c; /* Return last read character */
-}
-
-/* Register a callback function to be called for tab-completion.
- Returns the prior callback so that the caller may (if needed)
- restore it when done. */
-linenoiseCompletionCallback * linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn) {
- linenoiseCompletionCallback * old = completionCallback;
- completionCallback = fn;
- return old;
-}
-
-void linenoiseAddCompletion(linenoiseCompletions *lc, const char *str) {
- lc->cvec = (char **)realloc(lc->cvec,sizeof(char*)*(lc->len+1));
- lc->cvec[lc->len++] = strdup(str);
+ /* Go process the char normally */
+ refreshLine(current);
+ return c;
}
-#endif
-
static int linenoiseEdit(struct current *current) {
int history_index = 0;
linenoiseHistoryAdd("");
set_current(current, "");
- refreshLine(current->prompt, current);
+ refreshLine(current);
while(1) {
int dir = -1;
/* Only autocomplete when the callback is set. It returns < 0 when
* there was an error reading from fd. Otherwise it will return the
* character that should be handled next. */
- if (c == '\t' && current->pos == current->chars && completionCallback != NULL) {
+ if (c == '\t' && current->pos == sb_chars(current->buf) && completionCallback != NULL) {
c = completeLine(current);
- /* Return on errors */
- if (c < 0) return current->len;
- /* Read next character when 0 */
- if (c == 0) continue;
}
#endif
+ if (c == ctrl('R')) {
+ /* reverse incremental search will provide an alternative keycode or 0 for none */
+ c = reverseIncrementalSearch(current);
+ /* go on to process the returned char normally */
+ }
-process_char:
- if (c == -1) return current->len;
#ifdef USE_TERMIOS
- if (c == 27) { /* escape sequence */
+ if (c == CHAR_ESCAPE) { /* escape sequence */
c = check_special(current->fd);
}
#endif
+ if (c == -1) {
+ /* Return on errors */
+ return sb_len(current->buf);
+ }
+
switch(c) {
- case '\r': /* enter */
+ case SPECIAL_NONE:
+ break;
+ case '\r': /* enter/CR */
+ case '\n': /* LF */
history_len--;
free(history[history_len]);
- return current->len;
+ current->pos = sb_chars(current->buf);
+ if (mlmode || hintsCallback) {
+ showhints = 0;
+ refreshLine(current);
+ showhints = 1;
+ }
+ return sb_len(current->buf);
case ctrl('C'): /* ctrl-c */
errno = EAGAIN;
return -1;
- case 127: /* backspace */
+ case ctrl('Z'): /* ctrl-z */
+#ifdef SIGTSTP
+ /* send ourselves SIGSUSP */
+ disableRawMode(current);
+ raise(SIGTSTP);
+ /* and resume */
+ enableRawMode(current);
+ refreshLine(current);
+#endif
+ continue;
+ case CHAR_DELETE: /* backspace */
case ctrl('H'):
if (remove_char(current, current->pos - 1) == 1) {
- refreshLine(current->prompt, current);
+ refreshLine(current);
}
break;
case ctrl('D'): /* ctrl-d */
- if (current->len == 0) {
+ if (sb_len(current->buf) == 0) {
/* Empty line, so EOF */
history_len--;
free(history[history_len]);
/* Otherwise fall through to delete char to right of cursor */
case SPECIAL_DELETE:
if (remove_char(current, current->pos) == 1) {
- refreshLine(current->prompt, current);
+ refreshLine(current);
}
break;
case SPECIAL_INSERT:
}
if (remove_chars(current, pos, current->pos - pos)) {
- refreshLine(current->prompt, current);
- }
- }
- break;
- case ctrl('R'): /* ctrl-r */
- {
- /* Display the reverse-i-search prompt and process chars */
- char rbuf[50];
- char rprompt[80];
- int rchars = 0;
- int rlen = 0;
- int searchpos = history_len - 1;
-
- rbuf[0] = 0;
- while (1) {
- int n = 0;
- const char *p = NULL;
- int skipsame = 0;
- int searchdir = -1;
-
- snprintf(rprompt, sizeof(rprompt), "(reverse-i-search)'%s': ", rbuf);
- refreshLine(rprompt, current);
- c = fd_read(current);
- if (c == ctrl('H') || c == 127) {
- if (rchars) {
- int p = utf8_index(rbuf, --rchars);
- rbuf[p] = 0;
- rlen = strlen(rbuf);
- }
- continue;
- }
-#ifdef USE_TERMIOS
- if (c == 27) {
- c = check_special(current->fd);
- }
-#endif
- if (c == ctrl('P') || c == SPECIAL_UP) {
- /* Search for the previous (earlier) match */
- if (searchpos > 0) {
- searchpos--;
- }
- skipsame = 1;
- }
- else if (c == ctrl('N') || c == SPECIAL_DOWN) {
- /* Search for the next (later) match */
- if (searchpos < history_len) {
- searchpos++;
- }
- searchdir = 1;
- skipsame = 1;
- }
- else if (c >= ' ') {
- if (rlen >= (int)sizeof(rbuf) + 3) {
- continue;
- }
-
- n = utf8_getchars(rbuf + rlen, c);
- rlen += n;
- rchars++;
- rbuf[rlen] = 0;
-
- /* Adding a new char resets the search location */
- searchpos = history_len - 1;
- }
- else {
- /* Exit from incremental search mode */
- break;
- }
-
- /* Now search through the history for a match */
- for (; searchpos >= 0 && searchpos < history_len; searchpos += searchdir) {
- p = strstr(history[searchpos], rbuf);
- if (p) {
- /* Found a match */
- if (skipsame && strcmp(history[searchpos], current->buf) == 0) {
- /* But it is identical, so skip it */
- continue;
- }
- /* Copy the matching line and set the cursor position */
- set_current(current,history[searchpos]);
- current->pos = utf8_strlen(history[searchpos], p - history[searchpos]);
- break;
- }
- }
- if (!p && n) {
- /* No match, so don't add it */
- rchars--;
- rlen -= n;
- rbuf[rlen] = 0;
- }
- }
- if (c == ctrl('G') || c == ctrl('C')) {
- /* ctrl-g terminates the search with no effect */
- set_current(current, "");
- c = 0;
+ refreshLine(current);
}
- else if (c == ctrl('J')) {
- /* ctrl-j terminates the search leaving the buffer in place */
- c = 0;
- }
- /* Go process the char normally */
- refreshLine(current->prompt, current);
- goto process_char;
}
break;
case ctrl('T'): /* ctrl-t */
- if (current->pos > 0 && current->pos <= current->chars) {
+ if (current->pos > 0 && current->pos <= sb_chars(current->buf)) {
/* If cursor is at end, transpose the previous two chars */
- int fixer = (current->pos == current->chars);
+ int fixer = (current->pos == sb_chars(current->buf));
c = get_char(current, current->pos - fixer);
remove_char(current, current->pos - fixer);
insert_char(current, current->pos - 1, c);
- refreshLine(current->prompt, current);
+ refreshLine(current);
}
break;
case ctrl('V'): /* ctrl-v */
- if (has_room(current, 3)) {
- /* Insert the ^V first */
- if (insert_char(current, current->pos, c)) {
- refreshLine(current->prompt, current);
- /* Now wait for the next char. Can insert anything except \0 */
- c = fd_read(current);
-
- /* Remove the ^V first */
- remove_char(current, current->pos - 1);
- if (c != -1) {
- /* Insert the actual char */
- insert_char(current, current->pos, c);
- }
- refreshLine(current->prompt, current);
+ /* Insert the ^V first */
+ if (insert_char(current, current->pos, c)) {
+ refreshLine(current);
+ /* Now wait for the next char. Can insert anything except \0 */
+ c = fd_read(current);
+
+ /* Remove the ^V first */
+ remove_char(current, current->pos - 1);
+ if (c > 0) {
+ /* Insert the actual char, can't be error or null */
+ insert_char(current, current->pos, c);
}
+ refreshLine(current);
}
break;
case ctrl('B'):
case SPECIAL_LEFT:
if (current->pos > 0) {
current->pos--;
- refreshLine(current->prompt, current);
+ refreshLine(current);
}
break;
case ctrl('F'):
case SPECIAL_RIGHT:
- if (current->pos < current->chars) {
+ if (current->pos < sb_chars(current->buf)) {
current->pos++;
- refreshLine(current->prompt, current);
+ refreshLine(current);
}
break;
case SPECIAL_PAGE_UP:
/* Update the current history entry before to
* overwrite it with tne next one. */
free(history[history_len - 1 - history_index]);
- history[history_len - 1 - history_index] = strdup(current->buf);
+ history[history_len - 1 - history_index] = strdup(sb_str(current->buf));
/* Show the new entry */
history_index += dir;
if (history_index < 0) {
break;
}
set_current(current, history[history_len - 1 - history_index]);
- refreshLine(current->prompt, current);
+ refreshLine(current);
}
break;
case ctrl('A'): /* Ctrl+a, go to the start of the line */
case SPECIAL_HOME:
current->pos = 0;
- refreshLine(current->prompt, current);
+ refreshLine(current);
break;
case ctrl('E'): /* ctrl+e, go to the end of the line */
case SPECIAL_END:
- current->pos = current->chars;
- refreshLine(current->prompt, current);
+ current->pos = sb_chars(current->buf);
+ refreshLine(current);
break;
case ctrl('U'): /* Ctrl+u, delete to beginning of line, save deleted chars. */
if (remove_chars(current, 0, current->pos)) {
- refreshLine(current->prompt, current);
+ refreshLine(current);
}
break;
case ctrl('K'): /* Ctrl+k, delete from current to end of line, save deleted chars. */
- if (remove_chars(current, current->pos, current->chars - current->pos)) {
- refreshLine(current->prompt, current);
+ if (remove_chars(current, current->pos, sb_chars(current->buf) - current->pos)) {
+ refreshLine(current);
}
break;
case ctrl('Y'): /* Ctrl+y, insert saved chars at current position */
- if (current->capture && insert_chars(current, current->pos, current->capture)) {
- refreshLine(current->prompt, current);
+ if (current->capture && insert_chars(current, current->pos, sb_str(current->capture))) {
+ refreshLine(current);
}
break;
case ctrl('L'): /* Ctrl+L, clear screen */
linenoiseClearScreen();
/* Force recalc of window size for serial terminals */
current->cols = 0;
- refreshLine(current->prompt, current);
+ current->rpos = 0;
+ refreshLine(current);
break;
default:
/* Only tab is allowed without ^V */
if (c == '\t' || c >= ' ') {
if (insert_char(current, current->pos, c) == 1) {
- refreshLine(current->prompt, current);
+ refreshLine(current);
}
}
break;
}
}
- return current->len;
+ return sb_len(current->buf);
}
int linenoiseColumns(void)
{
struct current current;
+ current.output = NULL;
enableRawMode (¤t);
getWindowSize (¤t);
disableRawMode (¤t);
return current.cols;
}
+/**
+ * Reads a line from the file handle (without the trailing NL or CRNL)
+ * and returns it in a stringbuf.
+ * Returns NULL if no characters are read before EOF or error.
+ *
+ * Note that the character count will *not* be correct for lines containing
+ * utf8 sequences. Do not rely on the character count.
+ */
+static stringbuf *sb_getline(FILE *fh)
+{
+ stringbuf *sb = sb_alloc();
+ int c;
+ int n = 0;
+
+ while ((c = getc(fh)) != EOF) {
+ char ch;
+ n++;
+ if (c == '\r') {
+ /* CRLF -> LF */
+ continue;
+ }
+ if (c == '\n' || c == '\r') {
+ break;
+ }
+ ch = c;
+ /* ignore the effect of character count for partial utf8 sequences */
+ sb_append_len(sb, &ch, 1);
+ }
+ if (n == 0) {
+ sb_free(sb);
+ return NULL;
+ }
+ return sb;
+}
+
char *linenoise(const char *prompt)
{
int count;
struct current current;
- char buf[LINENOISE_MAX_LINE];
+ stringbuf *sb;
+
+ memset(¤t, 0, sizeof(current));
if (enableRawMode(¤t) == -1) {
printf("%s", prompt);
fflush(stdout);
- if (fgets(buf, sizeof(buf), stdin) == NULL) {
- return NULL;
- }
- count = strlen(buf);
- if (count && buf[count-1] == '\n') {
- count--;
- buf[count] = '\0';
- }
+ sb = sb_getline(stdin);
}
- else
- {
- current.buf = buf;
- current.bufmax = sizeof(buf);
- current.len = 0;
- current.chars = 0;
+ else {
+ current.buf = sb_alloc();
current.pos = 0;
+ current.nrows = 1;
current.prompt = prompt;
- current.capture = NULL;
count = linenoiseEdit(¤t);
disableRawMode(¤t);
printf("\n");
- free(current.capture);
+ sb_free(current.capture);
if (count == -1) {
+ sb_free(current.buf);
return NULL;
}
+ sb = current.buf;
}
- return strdup(buf);
+ return sb ? sb_to_string(sb) : NULL;
}
/* Using a circular buffer is smarter, but a bit more complex to handle. */
-int linenoiseHistoryAdd(const char *line) {
- char *linecopy;
+int linenoiseHistoryAddAllocated(char *line) {
- if (history_max_len == 0) return 0;
+ if (history_max_len == 0) {
+notinserted:
+ free(line);
+ return 0;
+ }
if (history == NULL) {
- history = (char **)malloc(sizeof(char*)*history_max_len);
- if (history == NULL) return 0;
- memset(history,0,(sizeof(char*)*history_max_len));
+ history = (char **)calloc(sizeof(char*), history_max_len);
}
/* do not insert duplicate lines into history */
if (history_len > 0 && strcmp(line, history[history_len - 1]) == 0) {
- return 0;
+ goto notinserted;
}
- linecopy = strdup(line);
- if (!linecopy) return 0;
if (history_len == history_max_len) {
free(history[0]);
memmove(history,history+1,sizeof(char*)*(history_max_len-1));
history_len--;
}
- history[history_len] = linecopy;
+ history[history_len] = line;
history_len++;
return 1;
}
+int linenoiseHistoryAdd(const char *line) {
+ return linenoiseHistoryAddAllocated(strdup(line));
+}
+
int linenoiseHistoryGetMaxLen(void) {
return history_max_len;
}
if (history) {
int tocopy = history_len;
- newHistory = (char **)malloc(sizeof(char*)*len);
- if (newHistory == NULL) return 0;
+ newHistory = (char **)calloc(sizeof(char*), len);
/* If we can't copy everything, free the elements we'll not use. */
if (len < tocopy) {
for (j = 0; j < tocopy-len; j++) free(history[j]);
tocopy = len;
}
- memset(newHistory,0,sizeof(char*)*len);
memcpy(newHistory,history+(history_len-tocopy), sizeof(char*)*tocopy);
free(history);
history = newHistory;
return 0;
}
-/* Load the history from the specified file. If the file does not exist
- * zero is returned and no operation is performed.
+/* Load the history from the specified file.
*
- * If the file exists and the operation succeeded 0 is returned, otherwise
- * on error -1 is returned. */
+ * If the file does not exist or can't be opened, no operation is performed
+ * and -1 is returned.
+ * Otherwise 0 is returned.
+ */
int linenoiseHistoryLoad(const char *filename) {
FILE *fp = fopen(filename,"r");
- char buf[LINENOISE_MAX_LINE];
+ stringbuf *sb;
if (fp == NULL) return -1;
- while (fgets(buf,LINENOISE_MAX_LINE,fp) != NULL) {
- char *src, *dest;
+ while ((sb = sb_getline(fp)) != NULL) {
+ /* Take the stringbuf and decode backslash escaped values */
+ char *buf = sb_to_string(sb);
+ char *dest = buf;
+ const char *src;
- /* Decode backslash escaped values */
- for (src = dest = buf; *src; src++) {
+ for (src = buf; *src; src++) {
char ch = *src;
if (ch == '\\') {
}
*dest++ = ch;
}
- /* Remove trailing newline */
- if (dest != buf && (dest[-1] == '\n' || dest[-1] == '\r')) {
- dest--;
- }
*dest = 0;
- linenoiseHistoryAdd(buf);
+ linenoiseHistoryAddAllocated(buf);
}
fclose(fp);
return 0;
projects / linenoise.git / blobdiff