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nano/search.c

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/* $Id$ */
/**************************************************************************
* search.c *
* *
* Copyright (C) 2000 Chris Allegretta *
* This program is free software; you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation; either version 1, or (at your option) *
* any later version. *
* *
* This program is distributed in the hope that it will be useful, *
* but WITHOUT ANY WARRANTY; without even the implied warranty of *
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the *
* GNU General Public License for more details. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program; if not, write to the Free Software *
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. *
* *
**************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <stdio.h>
#include <ctype.h>
#include "config.h"
#include "proto.h"
#include "nano.h"
#ifndef NANO_SMALL
#include <libintl.h>
#define _(string) gettext(string)
#else
#define _(string) (string)
#endif
/* Regular expression helper functions */
#ifdef HAVE_REGEX_H
void regexp_init(const char *regexp)
{
regcomp(&search_regexp, regexp, ISSET(CASE_SENSITIVE) ? 0 : REG_ICASE);
SET(REGEXP_COMPILED);
}
void regexp_cleanup()
{
UNSET(REGEXP_COMPILED);
regfree(&search_regexp);
}
#endif
void search_init_globals(void)
{
if (last_search == NULL) {
last_search = nmalloc(1);
last_search[0] = 0;
}
if (last_replace == NULL) {
last_replace = nmalloc(1);
last_replace[0] = 0;
}
}
/* Set up the system variables for a search or replace. Returns -1 on
abort, 0 on success, and 1 on rerun calling program
Return -2 to run opposite program (searchg -> replace, replace -> search)
replacing = 1 if we call from do_replace, 0 if called from do_search func.
*/
int search_init(int replacing)
{
int i = 0;
char *buf;
char *prompt, *reprompt = "";
search_init_globals();
buf = nmalloc(strlen(last_search) + 5);
buf[0] = 0;
/* If using Pico messages, we do things the old fashioned way... */
if (ISSET(PICO_MSGS)) {
if (last_search[0]) {
/* We use COLS / 3 here because we need to see more on the line */
if (strlen(last_search) > COLS / 3) {
snprintf(buf, COLS / 3 + 3, " [%s", last_search);
sprintf(&buf[COLS / 3 + 2], "...]");
} else
sprintf(buf, " [%s]", last_search);
} else {
buf[0] = '\0';
}
}
if (ISSET(USE_REGEXP) && ISSET(CASE_SENSITIVE))
prompt = _("Case Sensitive Regexp Search%s%s");
else if (ISSET(USE_REGEXP))
prompt = _("Regexp Search%s%s");
else if (ISSET(CASE_SENSITIVE))
prompt = _("Case Sensitive Search%s%s");
else
prompt = _("Search%s%s");
if (replacing)
reprompt = _(" (to replace)");
if (ISSET(PICO_MSGS))
i = statusq(0, replacing ? replace_list : whereis_list,
replacing ? REPLACE_LIST_LEN : WHEREIS_LIST_LEN, "",
prompt, reprompt, buf);
else
i = statusq(0, replacing ? replace_list : whereis_list,
replacing ? REPLACE_LIST_LEN : WHEREIS_LIST_LEN, last_search,
prompt, reprompt, "");
/* Cancel any search, or just return with no previous search */
if ((i == -1) || (i < 0 && !last_search[0])) {
statusbar(_("Search Cancelled"));
reset_cursor();
return -1;
} else if (i == -2) { /* Same string */
answer = mallocstrcpy(answer, last_search);
#ifdef HAVE_REGEX_H
if (ISSET(USE_REGEXP))
regexp_init(answer);
#endif
} else if (i == 0) { /* They entered something new */
last_search = mallocstrcpy(last_search, answer);
#ifdef HAVE_REGEX_H
if (ISSET(USE_REGEXP))
regexp_init(answer);
#endif
/* Blow away last_replace because they entered a new search
string....uh, right? =) */
last_replace[0] = '\0';
} else if (i == NANO_CASE_KEY) { /* They want it case sensitive */
if (ISSET(CASE_SENSITIVE))
UNSET(CASE_SENSITIVE);
else
SET(CASE_SENSITIVE);
return 1;
} else if (i == NANO_OTHERSEARCH_KEY) {
return -2; /* Call the opposite search function */
} else if (i == NANO_FROMSEARCHTOGOTO_KEY) {
do_gotoline_void();
return -3;
} else { /* First line key, etc. */
do_early_abort();
return -3;
}
return 0;
}
void not_found_msg(char *str)
{
char foo[COLS];
if (strlen(str) < COLS / 2)
statusbar(_("\"%s\" not found"), str);
else {
strncpy(foo, str, COLS / 2);
foo[COLS / 2] = 0;
statusbar(_("\"%s...\" not found"), foo);
}
}
filestruct *findnextstr(int quiet, filestruct * begin, int beginx,
char *needle)
{
filestruct *fileptr;
char *searchstr, *found = NULL, *tmp;
int past_editbot = 0;
fileptr = current;
current_x++;
/* Are we searching the last line? (i.e. the line where search started) */
if ((fileptr == begin) && (current_x < beginx))
search_last_line = 1;
/* Make sure we haven't passed the end of the string */
if (strlen(fileptr->data) < current_x)
current_x--;
searchstr = &fileptr->data[current_x];
/* Look for needle in searchstr */
while ((found = strstrwrapper(searchstr, needle)) == NULL) {
/* finished processing file, get out */
if (search_last_line) {
if (!quiet)
not_found_msg(needle);
return NULL;
}
fileptr = fileptr->next;
if (!past_editbot && (fileptr == editbot))
past_editbot = 1;
/* EOF reached, wrap around once */
if (fileptr == NULL) {
fileptr = fileage;
past_editbot = 1;
if (!quiet)
statusbar(_("Search Wrapped"));
}
/* Original start line reached */
if (fileptr == begin)
search_last_line = 1;
searchstr = fileptr->data;
}
/* We found an instance */
current = fileptr;
current_x = 0;
for (tmp = fileptr->data; tmp != found; tmp++)
current_x++;
/* Ensure we haven't wrap around again! */
if ((search_last_line) && (current_x >= beginx)) {
if (!quiet)
not_found_msg(needle);
return NULL;
}
if (past_editbot)
edit_update(fileptr, CENTER);
else
update_line(current, current_x);
placewewant = xplustabs();
reset_cursor();
return fileptr;
}
void search_abort(void)
{
UNSET(KEEP_CUTBUFFER);
display_main_list();
wrefresh(bottomwin);
if (ISSET(MARK_ISSET))
edit_refresh_clearok();
#ifdef HAVE_REGEX_H
if (ISSET(REGEXP_COMPILED))
regexp_cleanup();
#endif
}
/* Search for a string */
int do_search(void)
{
int i;
filestruct *fileptr = current;
wrap_reset();
i = search_init(0);
switch (i) {
case -1:
current = fileptr;
search_abort();
return 0;
case -3:
search_abort();
return 0;
case -2:
do_replace();
return 0;
case 1:
do_search();
search_abort();
return 1;
}
/* The sneaky user deleted the previous search string */
if (!strcmp(answer, "")) {
statusbar(_("Search Cancelled"));
search_abort();
return 0;
}
search_last_line = 0;
findnextstr(0, current, current_x, answer);
search_abort();
return 1;
}
void print_replaced(int num)
{
if (num > 1)
statusbar(_("Replaced %d occurences"), num);
else if (num == 1)
statusbar(_("Replaced 1 occurence"));
}
void replace_abort(void)
{
/* Identicle to search_abort, so we'll call it here. If it
does something different later, we can change it back. For now
it's just a waste to duplicat code */
search_abort();
placewewant = xplustabs();
}
#ifdef HAVE_REGEX_H
int replace_regexp(char *string, int create_flag)
{
/* split personality here - if create_flag is null, just calculate
* the size of the replacement line (necessary because of
* subexpressions like \1 \2 \3 in the replaced text) */
char *c;
int new_size = strlen(current->data) + 1;
int search_match_count = regmatches[0].rm_eo - regmatches[0].rm_so;
new_size -= search_match_count;
/* Iterate through the replacement text to handle
* subexpression replacement using \1, \2, \3, etc */
c = last_replace;
while (*c) {
if (*c != '\\') {
if (create_flag)
*string++ = *c;
c++;
new_size++;
} else {
int num = (int) *(c + 1) - (int) '0';
if (num >= 1 && num <= 9) {
int i = regmatches[num].rm_so;
if (num > search_regexp.re_nsub) {
/* Ugh, they specified a subexpression that doesn't
exist. */
return -1;
}
/* Skip over the replacement expression */
c += 2;
/* But add the length of the subexpression to new_size */
new_size += regmatches[num].rm_eo - regmatches[num].rm_so;
/* And if create_flag is set, append the result of the
* subexpression match to the new line */
while (create_flag && i < regmatches[num].rm_eo)
*string++ = *(current->data + i++);
} else {
if (create_flag)
*string++ = *c;
c++;
new_size++;
}
}
}
if (create_flag)
*string = 0;
return new_size;
}
#endif
char *replace_line(void)
{
char *copy, *tmp;
int new_line_size;
int search_match_count;
/* Calculate size of new line */
#ifdef HAVE_REGEX_H
if (ISSET(USE_REGEXP)) {
search_match_count = regmatches[0].rm_eo - regmatches[0].rm_so;
new_line_size = replace_regexp(NULL, 0);
/* If they specified an invalid subexpression in the replace
* text, return NULL indicating an error */
if (new_line_size < 0)
return NULL;
} else {
#else
{
#endif
search_match_count = strlen(last_search);
new_line_size = strlen(current->data) - strlen(last_search) +
strlen(last_replace) + 1;
}
/* Create buffer */
copy = nmalloc(new_line_size);
/* Head of Original Line */
strncpy(copy, current->data, current_x);
copy[current_x] = 0;
/* Replacement Text */
if (!ISSET(USE_REGEXP))
strcat(copy, last_replace);
#ifdef HAVE_REGEX_H
else
(void) replace_regexp(copy + current_x, 1);
#endif
/* The tail of the original line */
/* This may expose other bugs, because it no longer
goes through each character on the string
and tests for string goodness. But because
we can assume the invariant that current->data
is less than current_x + strlen(last_search) long,
this should be safe. Or it will expose bugs ;-) */
tmp = current->data + current_x + search_match_count;
strcat(copy, tmp);
return copy;
}
int do_replace_loop(char *prevanswer, filestruct *begin, int *beginx,
int wholewords, int *i)
{
int replaceall = 0, numreplaced = 0;
filestruct *fileptr;
char *copy;
switch (*i) {
case -1: /* Aborted enter */
if (strcmp(last_replace, ""))
answer = mallocstrcpy(answer, last_replace);
statusbar(_("Replace Cancelled"));
replace_abort();
return 0;
case 0: /* They actually entered something */
last_replace = mallocstrcpy(last_replace, answer);
break;
default:
if (*i != -2) { /* First page, last page, for example
could get here */
do_early_abort();
replace_abort();
return 0;
}
}
while (1) {
/* Sweet optimization by Rocco here */
fileptr = findnextstr(replaceall, begin, *beginx, prevanswer);
/* No more matches. Done! */
if (!fileptr)
break;
/* Make sure only wholewords are found */
if (wholewords)
{
/* start of line or previous character not a letter */
if ((current_x == 0) || (!isalpha(fileptr->data[current_x-1])))
{
/* end of line or next character not a letter */
if (((current_x + strlen(prevanswer)) == strlen(fileptr->data))
|| (!isalpha(fileptr->data[current_x + strlen(prevanswer)])))
;
else
continue;
}
else
continue;
}
/* If we're here, we've found the search string */
if (!replaceall)
*i = do_yesno(1, 1, _("Replace this instance?"));
if (*i > 0 || replaceall) { /* Yes, replace it!!!! */
if (*i == 2)
replaceall = 1;
copy = replace_line();
if (!copy) {
statusbar(_("Replace failed: unknown subexpression!"));
replace_abort();
return 0;
}
/* Cleanup */
free(current->data);
current->data = copy;
/* Stop bug where we replace a substring of the replacement text */
current_x += strlen(last_replace) - 1;
/* Adjust the original cursor position - COULD BE IMPROVED */
if (search_last_line) {
*beginx += strlen(last_replace) - strlen(last_search);
/* For strings that cross the search start/end boundary */
/* Don't go outside of allocated memory */
if (*beginx < 1)
*beginx = 1;
}
edit_refresh();
set_modified();
numreplaced++;
} else if (*i == -1) /* Abort, else do nothing and continue loop */
break;
}
return numreplaced;
}
/* Replace a string */
int do_replace(void)
{
int i, numreplaced, beginx;
filestruct *begin;
char *prevanswer = NULL, *buf = NULL;
i = search_init(1);
switch (i) {
case -1:
statusbar(_("Replace Cancelled"));
replace_abort();
return 0;
case 1:
do_replace();
return 1;
case -2:
do_search();
return 0;
case -3:
replace_abort();
return 0;
}
/* Again, there was a previous string but they deleted it and hit enter */
if (!strcmp(answer, "")) {
statusbar(_("Replace Cancelled"));
replace_abort();
return 0;
}
prevanswer = mallocstrcpy(prevanswer, answer);
if (ISSET(PICO_MSGS)) {
buf = nmalloc(strlen(last_replace) + 5);
if (strcmp(last_replace, "")) {
if (strlen(last_replace) > (COLS / 3)) {
strncpy(buf, last_replace, COLS / 3);
sprintf(&buf[COLS / 3 - 1], "...");
} else
sprintf(buf, "%s", last_replace);
i = statusq(0, replace_list_2, REPLACE_LIST_2_LEN, "",
_("Replace with [%s]"), buf);
}
else
i = statusq(0, replace_list_2, REPLACE_LIST_2_LEN, "",
_("Replace with"));
}
else
i = statusq(0, replace_list_2, REPLACE_LIST_2_LEN, last_replace,
_("Replace with"));
/* save where we are */
begin = current;
beginx = current_x + 1;
search_last_line = 0;
numreplaced = do_replace_loop(prevanswer, begin, &beginx, FALSE, &i);
/* restore where we were */
current = begin;
current_x = beginx - 1;
renumber_all();
edit_update(current, CENTER);
print_replaced(numreplaced);
replace_abort();
return 1;
}
void goto_abort(void)
{
UNSET(KEEP_CUTBUFFER);
display_main_list();
}
int do_gotoline(long defline)
{
long line, i = 1, j = 0;
filestruct *fileptr;
if (defline > 0) /* We already know what line we want to go to */
line = defline;
else { /* Ask for it */
j = statusq(0, goto_list, GOTO_LIST_LEN, "", _("Enter line number"));
if (j == -1) {
statusbar(_("Aborted"));
goto_abort();
return 0;
} else if (j != 0) {
do_early_abort();
goto_abort();
return 0;
}
if (!strcmp(answer, "$")) {
current = filebot;
current_x = 0;
edit_update(current, CENTER);
goto_abort();
return 1;
}
line = atoi(answer);
}
/* Bounds check */
if (line <= 0) {
statusbar(_("Come on, be reasonable"));
goto_abort();
return 0;
}
if (line > totlines) {
statusbar(_("Only %d lines available, skipping to last line"),
filebot->lineno);
current = filebot;
current_x = 0;
edit_update(current, CENTER);
} else {
for (fileptr = fileage; fileptr != NULL && i < line; i++)
fileptr = fileptr->next;
current = fileptr;
current_x = 0;
edit_update(current, CENTER);
}
goto_abort();
return 1;
}
int do_gotoline_void(void)
{
return do_gotoline(0);
}
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