diff --git a/linenoise.c b/linenoise.c index 574ab1f1..f24f6855 100644 --- a/linenoise.c +++ b/linenoise.c @@ -374,70 +374,6 @@ static void refreshLineWithCompletion(struct linenoiseState *ls, linenoiseComple if (lc != &ctable) freeCompletions(&ctable); } -/* This is an helper function for linenoiseEdit*() and is called when the - * user types the key in order to complete the string currently in the - * input. - * - * The state of the editing is encapsulated into the pointed linenoiseState - * structure as described in the structure definition. - * - * If the function returns non-zero, the caller should handle the - * returned value as a byte read from the standard input, and process - * it as usually: this basically means that the function may return a byte - * read from the termianl but not processed. Otherwise, if zero is returned, - * the input was consumed by the completeLine() function to navigate the - * possible completions, and the caller should read for the next characters - * from stdin. */ -static int completeLine(struct linenoiseState *ls, int keypressed) { - linenoiseCompletions lc = { 0, NULL }; - int nwritten; - char c = keypressed; - - completionCallback(ls->buf,&lc); - if (lc.len == 0) { - linenoiseBeep(); - ls->in_completion = 0; - } else { - switch(c) { - case 9: /* tab */ - if (ls->in_completion == 0) { - ls->in_completion = 1; - ls->completion_idx = 0; - } else { - ls->completion_idx = (ls->completion_idx+1) % (lc.len+1); - if (ls->completion_idx == lc.len) linenoiseBeep(); - } - c = 0; - break; - case 27: /* escape */ - /* Re-show original buffer */ - if (ls->completion_idx < lc.len) refreshLine(ls); - ls->in_completion = 0; - c = 0; - break; - default: - /* Update buffer and return */ - if (ls->completion_idx < lc.len) { - nwritten = snprintf(ls->buf,ls->buflen,"%s", - lc.cvec[ls->completion_idx]); - ls->len = ls->pos = nwritten; - } - ls->in_completion = 0; - break; - } - - /* Show completion or original buffer */ - if (ls->in_completion && ls->completion_idx < lc.len) { - refreshLineWithCompletion(ls,&lc,REFRESH_ALL); - } else { - refreshLine(ls); - } - } - - freeCompletions(&lc); - return c; /* Return last read character */ -} - /* Register a callback function to be called for tab-completion. */ void linenoiseSetCompletionCallback(linenoiseCompletionCallback *fn) { completionCallback = fn; @@ -844,6 +780,128 @@ void linenoiseEditDeletePrevWord(struct linenoiseState *l) { refreshLine(l); } +void linenoiseHandleTerminalEscapeSequence(struct linenoiseState *l) +{ + char seq[3]; + + /* Read the next two bytes representing the escape sequence. + * Use two calls to handle slow terminals returning the two + * chars at different times. */ + if (read(l->ifd,seq,1) == -1) return ; + if (read(l->ifd,seq+1,1) == -1) return ; + + /* ESC [ sequences. */ + if (seq[0] == '[') { + if (seq[1] >= '0' && seq[1] <= '9') { + /* Extended escape, read additional byte. */ + if (read(l->ifd,seq+2,1) == -1) return ; + if (seq[2] == '~') { + switch(seq[1]) { + case '3': /* Delete key. */ + linenoiseEditDelete(l); + break; + } + } + } else { + switch(seq[1]) { + case 'A': /* Up */ + linenoiseEditHistoryNext(l, LINENOISE_HISTORY_PREV); + break; + case 'B': /* Down */ + linenoiseEditHistoryNext(l, LINENOISE_HISTORY_NEXT); + break; + case 'C': /* Right */ + linenoiseEditMoveRight(l); + break; + case 'D': /* Left */ + linenoiseEditMoveLeft(l); + break; + case 'H': /* Home */ + linenoiseEditMoveHome(l); + break; + case 'F': /* End*/ + linenoiseEditMoveEnd(l); + break; + } + } + } + + /* ESC O sequences. */ + else if (seq[0] == 'O') { + switch(seq[1]) { + case 'H': /* Home */ + linenoiseEditMoveHome(l); + break; + case 'F': /* End*/ + linenoiseEditMoveEnd(l); + break; + } + } + return ; +} + +/* This is an helper function for linenoiseEdit*() and is called when the + * user types the key in order to complete the string currently in the + * input. + * + * The state of the editing is encapsulated into the pointed linenoiseState + * structure as described in the structure definition. + * + * If the function returns non-zero, the caller should handle the + * returned value as a byte read from the standard input, and process + * it as usually: this basically means that the function may return a byte + * read from the termianl but not processed. Otherwise, if zero is returned, + * the input was consumed by the completeLine() function to navigate the + * possible completions, and the caller should read for the next characters + * from stdin. */ +static int completeLine(struct linenoiseState *ls, int keypressed) { + linenoiseCompletions lc = { 0, NULL }; + int nwritten; + char c = keypressed; + + completionCallback(ls->buf,&lc); + if (lc.len == 0) { + linenoiseBeep(); + ls->in_completion = 0; + } else { + switch(c) { + case TAB: /* tab */ + if (ls->in_completion == 0) { + ls->in_completion = 1; + ls->completion_idx = 0; + } else { + ls->completion_idx = (ls->completion_idx+1) % (lc.len+1); + if (ls->completion_idx == lc.len) linenoiseBeep(); + } + c = 0; + break; + default: + /* Update buffer and return */ + if (ls->completion_idx < lc.len) { + nwritten = snprintf(ls->buf,ls->buflen,"%s", + lc.cvec[ls->completion_idx]); + ls->len = ls->pos = nwritten; + } + ls->in_completion = 0; + if (c == ESC) { + linenoiseHandleTerminalEscapeSequence(ls); + c = 0; + } + break; + } + + /* Show completion or original buffer */ + if (ls->in_completion && ls->completion_idx < lc.len) { + refreshLineWithCompletion(ls,&lc,REFRESH_ALL); + } else { + refreshLine(ls); + } + } + + freeCompletions(&lc); + return c; /* Return last read character */ +} + /* This function is part of the multiplexed API of Linenoise, that is used * in order to implement the blocking variant of the API but can also be * called by the user directly in an event driven program. It will: @@ -932,7 +990,6 @@ char *linenoiseEditFeed(struct linenoiseState *l) { char c; int nread; - char seq[3]; nread = read(l->ifd,&c,1); if (nread <= 0) return NULL; @@ -1002,59 +1059,7 @@ char *linenoiseEditFeed(struct linenoiseState *l) { linenoiseEditHistoryNext(l, LINENOISE_HISTORY_NEXT); break; case ESC: /* escape sequence */ - /* Read the next two bytes representing the escape sequence. - * Use two calls to handle slow terminals returning the two - * chars at different times. */ - if (read(l->ifd,seq,1) == -1) break; - if (read(l->ifd,seq+1,1) == -1) break; - - /* ESC [ sequences. */ - if (seq[0] == '[') { - if (seq[1] >= '0' && seq[1] <= '9') { - /* Extended escape, read additional byte. */ - if (read(l->ifd,seq+2,1) == -1) break; - if (seq[2] == '~') { - switch(seq[1]) { - case '3': /* Delete key. */ - linenoiseEditDelete(l); - break; - } - } - } else { - switch(seq[1]) { - case 'A': /* Up */ - linenoiseEditHistoryNext(l, LINENOISE_HISTORY_PREV); - break; - case 'B': /* Down */ - linenoiseEditHistoryNext(l, LINENOISE_HISTORY_NEXT); - break; - case 'C': /* Right */ - linenoiseEditMoveRight(l); - break; - case 'D': /* Left */ - linenoiseEditMoveLeft(l); - break; - case 'H': /* Home */ - linenoiseEditMoveHome(l); - break; - case 'F': /* End*/ - linenoiseEditMoveEnd(l); - break; - } - } - } - - /* ESC O sequences. */ - else if (seq[0] == 'O') { - switch(seq[1]) { - case 'H': /* Home */ - linenoiseEditMoveHome(l); - break; - case 'F': /* End*/ - linenoiseEditMoveEnd(l); - break; - } - } + linenoiseHandleTerminalEscapeSequence(l); break; default: if (linenoiseEditInsert(l,c)) return NULL;