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Diffstat (limited to 'src/search.c')
| -rw-r--r-- | src/search.c | 1498 |
1 files changed, 1498 insertions, 0 deletions
diff --git a/src/search.c b/src/search.c new file mode 100644 index 0000000..ca93098 --- /dev/null +++ b/src/search.c @@ -0,0 +1,1498 @@ +/* $Id: search.c 4527 2011-02-07 14:45:56Z astyanax $ */ +/************************************************************************** + * search.c * + * * + * Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, * + * 2008, 2009 Free Software Foundation, Inc. * + * 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 3, 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., 51 Franklin St, Fifth Floor, Boston, MA * + * 02110-1301, USA. * + * * + **************************************************************************/ + +#include "proto.h" + +#include <string.h> +#include <stdio.h> +#include <unistd.h> +#include <ctype.h> +#include <errno.h> +#include <time.h> + +static bool search_last_line = FALSE; + /* Have we gone past the last line while searching? */ +#if !defined(NANO_TINY) && defined(ENABLE_NANORC) +static bool history_changed = FALSE; + /* Have any of the history lists changed? */ +#endif +#ifdef HAVE_REGEX_H +static bool regexp_compiled = FALSE; + /* Have we compiled any regular expressions? */ + +/* Compile the regular expression regexp to see if it's valid. Return + * TRUE if it is, or FALSE otherwise. */ +bool regexp_init(const char *regexp) +{ + int rc; + + assert(!regexp_compiled); + + rc = regcomp(&search_regexp, regexp, REG_EXTENDED +#ifndef NANO_TINY + | (ISSET(CASE_SENSITIVE) ? 0 : REG_ICASE) +#endif + ); + + if (rc != 0) { + size_t len = regerror(rc, &search_regexp, NULL, 0); + char *str = charalloc(len); + + regerror(rc, &search_regexp, str, len); + statusbar(_("Bad regex \"%s\": %s"), regexp, str); + free(str); + + return FALSE; + } + + regexp_compiled = TRUE; + + return TRUE; +} + +/* Decompile the compiled regular expression we used in the last + * search, if any. */ +void regexp_cleanup(void) +{ + if (regexp_compiled) { + regexp_compiled = FALSE; + regfree(&search_regexp); + } +} +#endif + +/* Indicate on the statusbar that the string at str was not found by the + * last search. */ +void not_found_msg(const char *str) +{ + char *disp; + int numchars; + + assert(str != NULL); + + disp = display_string(str, 0, (COLS / 2) + 1, FALSE); + numchars = actual_x(disp, mbstrnlen(disp, COLS / 2)); + + statusbar(_("\"%.*s%s\" not found"), numchars, disp, + (disp[numchars] == '\0') ? "" : "..."); + + free(disp); +} + +/* Abort the current search or replace. Clean up by displaying the main + * shortcut list, updating the screen if the mark was on before, and + * decompiling the compiled regular expression we used in the last + * search, if any. */ +void search_replace_abort(void) +{ + display_main_list(); +#ifndef NANO_TINY + if (openfile->mark_set) + edit_refresh(); +#endif +#ifdef HAVE_REGEX_H + regexp_cleanup(); +#endif +} + +/* Initialize the global search and replace strings. */ +void search_init_globals(void) +{ + if (last_search == NULL) + last_search = mallocstrcpy(NULL, ""); + if (last_replace == NULL) + last_replace = mallocstrcpy(NULL, ""); +} + +/* Set up the system variables for a search or replace. If use_answer + * is TRUE, only set backupstring to answer. Return -2 to run the + * opposite program (search -> replace, replace -> search), return -1 if + * the search should be canceled (due to Cancel, a blank search string, + * Go to Line, or a failed regcomp()), return 0 on success, and return 1 + * on rerun calling program. + * + * replacing is TRUE if we call from do_replace(), and FALSE if called + * from do_search(). */ +int search_init(bool replacing, bool use_answer) +{ + int i = 0; + char *buf; + sc *s; + void (*func)(void); + bool meta_key = FALSE, func_key = FALSE; + static char *backupstring = NULL; + /* The search string we'll be using. */ + + /* If backupstring doesn't exist, initialize it to "". */ + if (backupstring == NULL) + backupstring = mallocstrcpy(NULL, ""); + + /* If use_answer is TRUE, set backupstring to answer and get out. */ + if (use_answer) { + backupstring = mallocstrcpy(backupstring, answer); + return 0; + } + + /* We display the search prompt below. If the user types a partial + * search string and then Replace or a toggle, we will return to + * do_search() or do_replace() and be called again. In that case, + * we should put the same search string back up. */ + + search_init_globals(); + + if (last_search[0] != '\0') { + char *disp = display_string(last_search, 0, COLS / 3, FALSE); + + buf = charalloc(strlen(disp) + 7); + /* We use (COLS / 3) here because we need to see more on the + * line. */ + sprintf(buf, " [%s%s]", disp, + (strlenpt(last_search) > COLS / 3) ? "..." : ""); + free(disp); + } else + buf = mallocstrcpy(NULL, ""); + + /* This is now one simple call. It just does a lot. */ + i = do_prompt(FALSE, +#ifndef DISABLE_TABCOMP + TRUE, +#endif + replacing ? MREPLACE : MWHEREIS, backupstring, + &meta_key, &func_key, +#ifndef NANO_TINY + &search_history, +#endif + edit_refresh, "%s%s%s%s%s%s", _("Search"), +#ifndef NANO_TINY + /* TRANSLATORS: This string is just a modifier for the search + * prompt; no grammar is implied. */ + ISSET(CASE_SENSITIVE) ? _(" [Case Sensitive]") : +#endif + "", +#ifdef HAVE_REGEX_H + /* TRANSLATORS: This string is just a modifier for the search + * prompt; no grammar is implied. */ + ISSET(USE_REGEXP) ? _(" [Regexp]") : +#endif + "", +#ifndef NANO_TINY + /* TRANSLATORS: This string is just a modifier for the search + * prompt; no grammar is implied. */ + ISSET(BACKWARDS_SEARCH) ? _(" [Backwards]") : +#endif + "", replacing ? +#ifndef NANO_TINY + openfile->mark_set ? _(" (to replace) in selection") : +#endif + _(" (to replace)") : "", buf); + + fflush(stderr); + + /* Release buf now that we don't need it anymore. */ + free(buf); + + free(backupstring); + backupstring = NULL; + + /* Cancel any search, or just return with no previous search. */ + if (i == -1 || (i < 0 && *last_search == '\0') || (!replacing && + i == 0 && *answer == '\0')) { + statusbar(_("Cancelled")); + return -1; + } else { + for (s = sclist; s != NULL; s = s->next) + if ((s->menu & currmenu) && i == s->seq) { + func = s->scfunc; + break; + } + + if (i == -2 || i == 0 ) { +#ifdef HAVE_REGEX_H + /* Use last_search if answer is an empty string, or + * answer if it isn't. */ + if (ISSET(USE_REGEXP) && !regexp_init((i == -2) ? + last_search : answer)) + return -1; +#endif + ; +#ifndef NANO_TINY + } else if (func == case_sens_void) { + TOGGLE(CASE_SENSITIVE); + backupstring = mallocstrcpy(backupstring, answer); + return 1; + } else if (func == backwards_void) { + TOGGLE(BACKWARDS_SEARCH); + backupstring = mallocstrcpy(backupstring, answer); + return 1; +#endif +#ifdef HAVE_REGEX_H + } else if (func == regexp_void) { + TOGGLE(USE_REGEXP); + backupstring = mallocstrcpy(backupstring, answer); + return 1; +#endif + } else if (func == do_replace || func == no_replace_void) { + backupstring = mallocstrcpy(backupstring, answer); + return -2; /* Call the opposite search function. */ + } else if (func == do_gotolinecolumn_void) { + do_gotolinecolumn(openfile->current->lineno, + openfile->placewewant + 1, TRUE, TRUE, FALSE, + TRUE); + /* Put answer up on the statusbar and + * fall through. */ + return 3; + } else { + return -1; + } + } + + return 0; +} + +/* Look for needle, starting at (current, current_x). If no_sameline is + * TRUE, skip over begin when looking for needle. begin is the line + * where we first started searching, at column begin_x. The return + * value specifies whether we found anything. If we did, set needle_len + * to the length of the string we found if it isn't NULL. */ +bool findnextstr( +#ifndef DISABLE_SPELLER + bool whole_word, +#endif + bool no_sameline, const filestruct *begin, size_t begin_x, const + char *needle, size_t *needle_len) +{ + size_t found_len; + /* The length of the match we find. */ + size_t current_x_find = 0; + /* The location in the current line of the match we find. */ + ssize_t current_y_find = openfile->current_y; + filestruct *fileptr = openfile->current; + const char *rev_start = fileptr->data, *found = NULL; + const subnfunc *f; + time_t lastkbcheck = time(NULL); + + /* rev_start might end up 1 character before the start or after the + * end of the line. This won't be a problem because strstrwrapper() + * will return immediately and say that no match was found, and + * rev_start will be properly set when the search continues on the + * previous or next line. */ + rev_start += +#ifndef NANO_TINY + ISSET(BACKWARDS_SEARCH) ? + openfile->current_x - 1 : +#endif + openfile->current_x + 1; + + /* Look for needle in the current line we're searching. */ + enable_nodelay(); + while (TRUE) { + if (time(NULL) - lastkbcheck > 1) { + lastkbcheck = time(NULL); + f = getfuncfromkey(edit); + if (f && f->scfunc == do_cancel) { + statusbar(_("Cancelled")); + return FALSE; + } + } + + found = strstrwrapper(fileptr->data, needle, rev_start); + + /* We've found a potential match. */ + if (found != NULL) { +#ifndef DISABLE_SPELLER + bool found_whole = FALSE; + /* Is this potential match a whole word? */ +#endif + + /* Set found_len to the length of the potential match. */ + found_len = +#ifdef HAVE_REGEX_H + ISSET(USE_REGEXP) ? + regmatches[0].rm_eo - regmatches[0].rm_so : +#endif + strlen(needle); + +#ifndef DISABLE_SPELLER + /* If we're searching for whole words, see if this potential + * match is a whole word. */ + if (whole_word) { + char *word = mallocstrncpy(NULL, found, found_len + 1); + word[found_len] = '\0'; + + found_whole = is_whole_word(found - fileptr->data, + fileptr->data, word); + free(word); + } +#endif + + /* If we're searching for whole words and this potential + * match isn't a whole word, or if we're not allowed to find + * a match on the same line we started on and this potential + * match is on that line, continue searching. */ + if ( +#ifndef DISABLE_SPELLER + (!whole_word || found_whole) && +#endif + (!no_sameline || fileptr != openfile->current)) + break; + } + + /* We've finished processing the file, so get out. */ + if (search_last_line) { + not_found_msg(needle); + disable_nodelay(); + return FALSE; + } + + /* Move to the previous or next line in the file. */ +#ifndef NANO_TINY + if (ISSET(BACKWARDS_SEARCH)) { + fileptr = fileptr->prev; + current_y_find--; + } else { +#endif + fileptr = fileptr->next; + current_y_find++; +#ifndef NANO_TINY + } +#endif + + /* We've reached the start or end of the buffer, so wrap + * around. */ + if (fileptr == NULL) { +#ifndef NANO_TINY + if (ISSET(BACKWARDS_SEARCH)) { + fileptr = openfile->filebot; + current_y_find = editwinrows - 1; + } else { +#endif + fileptr = openfile->fileage; + current_y_find = 0; +#ifndef NANO_TINY + } +#endif + statusbar(_("Search Wrapped")); + } + + /* We've reached the original starting line. */ + if (fileptr == begin) + search_last_line = TRUE; + + rev_start = fileptr->data; +#ifndef NANO_TINY + if (ISSET(BACKWARDS_SEARCH)) + rev_start += strlen(fileptr->data); +#endif + } + + /* We found an instance. */ + current_x_find = found - fileptr->data; + + /* Ensure we haven't wrapped around again! */ + if (search_last_line && +#ifndef NANO_TINY + ((!ISSET(BACKWARDS_SEARCH) && current_x_find > begin_x) || + (ISSET(BACKWARDS_SEARCH) && current_x_find < begin_x)) +#else + current_x_find > begin_x +#endif + ) { + not_found_msg(needle); + disable_nodelay(); + return FALSE; + } + + disable_nodelay(); + /* We've definitely found something. */ + openfile->current = fileptr; + openfile->current_x = current_x_find; + openfile->placewewant = xplustabs(); + openfile->current_y = current_y_find; + + /* needle_len holds the length of needle. */ + if (needle_len != NULL) + *needle_len = found_len; + + return TRUE; +} + +/* Clear the flag indicating that a search reached the last line of the + * file. We need to do this just before a new search. */ +void findnextstr_wrap_reset(void) +{ + search_last_line = FALSE; +} + +/* Search for a string. */ +void do_search(void) +{ + filestruct *fileptr = openfile->current; + size_t fileptr_x = openfile->current_x; + size_t pww_save = openfile->placewewant; + int i; + bool didfind; + + i = search_init(FALSE, FALSE); + + if (i == -1) + /* Cancel, Go to Line, blank search string, or regcomp() + * failed. */ + search_replace_abort(); + else if (i == -2) + /* Replace. */ + do_replace(); +#if !defined(NANO_TINY) || defined(HAVE_REGEX_H) + else if (i == 1) + /* Case Sensitive, Backwards, or Regexp search toggle. */ + do_search(); +#endif + + if (i != 0) + return; + + /* If answer is now "", copy last_search into answer. */ + if (*answer == '\0') + answer = mallocstrcpy(answer, last_search); + else + last_search = mallocstrcpy(last_search, answer); + +#ifndef NANO_TINY + /* If answer is not "", add this search string to the search history + * list. */ + if (answer[0] != '\0') + update_history(&search_history, answer); +#endif + + findnextstr_wrap_reset(); + didfind = findnextstr( +#ifndef DISABLE_SPELLER + FALSE, +#endif + FALSE, openfile->current, openfile->current_x, answer, NULL); + + /* Check to see if there's only one occurrence of the string and + * we're on it now. */ + if (fileptr == openfile->current && fileptr_x == + openfile->current_x && didfind) { +#ifdef HAVE_REGEX_H + /* Do the search again, skipping over the current line, if we're + * doing a bol and/or eol regex search ("^", "$", or "^$"), so + * that we find one only once per line. We should only end up + * back at the same position if the string isn't found again, in + * which case it's the only occurrence. */ + if (ISSET(USE_REGEXP) && regexp_bol_or_eol(&search_regexp, + last_search)) { + didfind = findnextstr( +#ifndef DISABLE_SPELLER + FALSE, +#endif + TRUE, openfile->current, + openfile->current_x, answer, NULL); + if (fileptr == openfile->current && fileptr_x == + openfile->current_x && !didfind) + statusbar(_("This is the only occurrence")); + } else { +#endif + statusbar(_("This is the only occurrence")); +#ifdef HAVE_REGEX_H + } +#endif + } + + openfile->placewewant = xplustabs(); + edit_redraw(fileptr, pww_save); + search_replace_abort(); +} + +#ifndef NANO_TINY +/* Search for the last string without prompting. */ +void do_research(void) +{ + filestruct *fileptr = openfile->current; + size_t fileptr_x = openfile->current_x; + size_t pww_save = openfile->placewewant; + bool didfind; + + search_init_globals(); + + if (last_search[0] != '\0') { +#ifdef HAVE_REGEX_H + /* Since answer is "", use last_search! */ + if (ISSET(USE_REGEXP) && !regexp_init(last_search)) + return; +#endif + + findnextstr_wrap_reset(); + didfind = findnextstr( +#ifndef DISABLE_SPELLER + FALSE, +#endif + FALSE, openfile->current, openfile->current_x, + last_search, NULL); + + /* Check to see if there's only one occurrence of the string and + * we're on it now. */ + if (fileptr == openfile->current && fileptr_x == + openfile->current_x && didfind) { +#ifdef HAVE_REGEX_H + /* Do the search again, skipping over the current line, if + * we're doing a bol and/or eol regex search ("^", "$", or + * "^$"), so that we find one only once per line. We should + * only end up back at the same position if the string isn't + * found again, in which case it's the only occurrence. */ + if (ISSET(USE_REGEXP) && regexp_bol_or_eol(&search_regexp, + last_search)) { + didfind = findnextstr( +#ifndef DISABLE_SPELLER + FALSE, +#endif + TRUE, openfile->current, openfile->current_x, + answer, NULL); + if (fileptr == openfile->current && fileptr_x == + openfile->current_x && !didfind) + statusbar(_("This is the only occurrence")); + } else { +#endif + statusbar(_("This is the only occurrence")); +#ifdef HAVE_REGEX_H + } +#endif + } + } else + statusbar(_("No current search pattern")); + + openfile->placewewant = xplustabs(); + edit_redraw(fileptr, pww_save); + search_replace_abort(); +} +#endif + +#ifdef HAVE_REGEX_H +int replace_regexp(char *string, bool create) +{ + /* We have a split personality here. If create is FALSE, just + * calculate the size of the replacement line (necessary because of + * subexpressions \1 to \9 in the replaced text). */ + + const char *c = last_replace; + size_t search_match_count = regmatches[0].rm_eo - + regmatches[0].rm_so; + size_t new_line_size = strlen(openfile->current->data) + 1 - + search_match_count; + + /* Iterate through the replacement text to handle subexpression + * replacement using \1, \2, \3, etc. */ + while (*c != '\0') { + int num = (*(c + 1) - '0'); + + if (*c != '\\' || num < 1 || num > 9 || num > + search_regexp.re_nsub) { + if (create) + *string++ = *c; + c++; + new_line_size++; + } else { + size_t i = regmatches[num].rm_eo - regmatches[num].rm_so; + + /* Skip over the replacement expression. */ + c += 2; + + /* But add the length of the subexpression to new_size. */ + new_line_size += i; + + /* And if create is TRUE, append the result of the + * subexpression match to the new line. */ + if (create) { + strncpy(string, openfile->current->data + + openfile->current_x + regmatches[num].rm_so, i); + string += i; + } + } + } + + if (create) + *string = '\0'; + + return new_line_size; +} +#endif + +char *replace_line(const char *needle) +{ + char *copy; + size_t new_line_size, search_match_count; + + /* Calculate the size of the 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, FALSE); + } else { +#endif + search_match_count = strlen(needle); + new_line_size = strlen(openfile->current->data) - + search_match_count + strlen(answer) + 1; +#ifdef HAVE_REGEX_H + } +#endif + + /* Create the buffer. */ + copy = charalloc(new_line_size); + + /* The head of the original line. */ + strncpy(copy, openfile->current->data, openfile->current_x); + + /* The replacement text. */ +#ifdef HAVE_REGEX_H + if (ISSET(USE_REGEXP)) + replace_regexp(copy + openfile->current_x, TRUE); + else +#endif + strcpy(copy + openfile->current_x, answer); + + /* The tail of the original line. */ + assert(openfile->current_x + search_match_count <= strlen(openfile->current->data)); + + strcat(copy, openfile->current->data + openfile->current_x + + search_match_count); + + return copy; +} + +/* Step through each replace word and prompt user before replacing. + * Parameters real_current and real_current_x are needed in order to + * allow the cursor position to be updated when a word before the cursor + * is replaced by a shorter word. + * + * needle is the string to seek. We replace it with answer. Return -1 + * if needle isn't found, else the number of replacements performed. If + * canceled isn't NULL, set it to TRUE if we canceled. */ +ssize_t do_replace_loop( +#ifndef DISABLE_SPELLER + bool whole_word, +#endif + bool *canceled, const filestruct *real_current, size_t + *real_current_x, const char *needle) +{ + ssize_t numreplaced = -1; + size_t match_len; + bool replaceall = FALSE; +#ifdef HAVE_REGEX_H + /* The starting-line match and bol/eol regex flags. */ + bool begin_line = FALSE, bol_or_eol = FALSE; +#endif +#ifndef NANO_TINY + bool old_mark_set = openfile->mark_set; + filestruct *edittop_save = openfile->edittop, *top, *bot; + size_t top_x, bot_x; + bool right_side_up = FALSE; + /* TRUE if (mark_begin, mark_begin_x) is the top of the mark, + * FALSE if (current, current_x) is. */ + + if (old_mark_set) { + /* If the mark is on, partition the filestruct so that it + * contains only the marked text, set edittop to the top of the + * partition, turn the mark off, and refresh the screen. */ + mark_order((const filestruct **)&top, &top_x, + (const filestruct **)&bot, &bot_x, &right_side_up); + filepart = partition_filestruct(top, top_x, bot, bot_x); + openfile->edittop = openfile->fileage; + openfile->mark_set = FALSE; +#ifdef ENABLE_COLOR + reset_multis(openfile->current, TRUE); +#endif + edit_refresh(); + } +#endif + + if (canceled != NULL) + *canceled = FALSE; + + findnextstr_wrap_reset(); + while (findnextstr( +#ifndef DISABLE_SPELLER + whole_word, +#endif +#ifdef HAVE_REGEX_H + /* We should find a bol and/or eol regex only once per line. If + * the bol_or_eol flag is set, it means that the last search + * found one on the beginning line, so we should skip over the + * beginning line when doing this search. */ + bol_or_eol +#else + FALSE +#endif + , real_current, *real_current_x, needle, &match_len)) { + int i = 0; + +#ifdef HAVE_REGEX_H + /* If the bol_or_eol flag is set, we've found a match on the + * beginning line already, and we're still on the beginning line + * after the search, it means that we've wrapped around, so + * we're done. */ + if (bol_or_eol && begin_line && openfile->current == + real_current) + break; + /* Otherwise, set the begin_line flag if we've found a match on + * the beginning line, reset the bol_or_eol flag, and + * continue. */ + else { + if (openfile->current == real_current) + begin_line = TRUE; + bol_or_eol = FALSE; + } +#endif + + if (!replaceall) + edit_refresh(); + + /* Indicate that we found the search string. */ + if (numreplaced == -1) + numreplaced = 0; + + if (!replaceall) { + size_t xpt = xplustabs(); + char *exp_word = display_string(openfile->current->data, + xpt, strnlenpt(openfile->current->data, + openfile->current_x + match_len) - xpt, FALSE); + + curs_set(0); + + do_replace_highlight(TRUE, exp_word); + + i = do_yesno_prompt(TRUE, _("Replace this instance?")); + + do_replace_highlight(FALSE, exp_word); + + free(exp_word); + + curs_set(1); + + if (i == -1) { /* We canceled the replace. */ + if (canceled != NULL) + *canceled = TRUE; + break; + } + } + +#ifdef HAVE_REGEX_H + /* Set the bol_or_eol flag if we're doing a bol and/or eol regex + * replace ("^", "$", or "^$"). */ + if (ISSET(USE_REGEXP) && regexp_bol_or_eol(&search_regexp, + needle)) + bol_or_eol = TRUE; +#endif + + if (i > 0 || replaceall) { /* Yes, replace it!!!! */ + char *copy; + size_t length_change; + +#ifndef NANO_TINY + update_undo(REPLACE); +#endif + if (i == 2) + replaceall = TRUE; + + copy = replace_line(needle); + + length_change = strlen(copy) - + strlen(openfile->current->data); + +#ifndef NANO_TINY + /* If the mark was on and (mark_begin, mark_begin_x) was the + * top of it, don't change mark_begin_x. */ + if (!old_mark_set || !right_side_up) { + /* Keep mark_begin_x in sync with the text changes. */ + if (openfile->current == openfile->mark_begin && + openfile->mark_begin_x > openfile->current_x) { + if (openfile->mark_begin_x < openfile->current_x + + match_len) + openfile->mark_begin_x = openfile->current_x; + else + openfile->mark_begin_x += length_change; + } + } + + /* If the mark was on and (current, current_x) was the top + * of it, don't change real_current_x. */ + if (!old_mark_set || right_side_up) { +#endif + /* Keep real_current_x in sync with the text changes. */ + if (openfile->current == real_current && + openfile->current_x <= *real_current_x) { + if (*real_current_x < + openfile->current_x + match_len) + *real_current_x = openfile->current_x + + match_len; + *real_current_x += length_change; + } +#ifndef NANO_TINY + } +#endif + + /* Set the cursor at the last character of the replacement + * text, so searching will resume after the replacement + * text. Note that current_x might be set to (size_t)-1 + * here. */ +#ifndef NANO_TINY + if (!ISSET(BACKWARDS_SEARCH)) +#endif + openfile->current_x += match_len + length_change - 1; + + /* Cleanup. */ + openfile->totsize += mbstrlen(copy) - + mbstrlen(openfile->current->data); + free(openfile->current->data); + openfile->current->data = copy; + +#ifdef ENABLE_COLOR + reset_multis(openfile->current, TRUE); +#endif + edit_refresh(); + if (!replaceall) { +#ifdef ENABLE_COLOR + /* If color syntaxes are available and turned on, we + * need to call edit_refresh(). */ + if (openfile->colorstrings != NULL && + !ISSET(NO_COLOR_SYNTAX)) + edit_refresh(); + else +#endif + update_line(openfile->current, openfile->current_x); + } + + set_modified(); + numreplaced++; + } + } + +#ifndef NANO_TINY + if (old_mark_set) { + /* If the mark was on, unpartition the filestruct so that it + * contains all the text again, set edittop back to what it was + * before, turn the mark back on, and refresh the screen. */ + unpartition_filestruct(&filepart); + openfile->edittop = edittop_save; + openfile->mark_set = TRUE; + edit_refresh(); + } +#endif + + /* If the NO_NEWLINES flag isn't set, and text has been added to the + * magicline, make a new magicline. */ + if (!ISSET(NO_NEWLINES) && openfile->filebot->data[0] != '\0') + new_magicline(); + + return numreplaced; +} + +/* Replace a string. */ +void do_replace(void) +{ + filestruct *edittop_save, *begin; + size_t begin_x, pww_save; + bool meta_key = FALSE, func_key = FALSE; + ssize_t numreplaced; + int i; + + if (ISSET(VIEW_MODE)) { + print_view_warning(); + search_replace_abort(); + return; + } + + i = search_init(TRUE, FALSE); + if (i == -1) { + /* Cancel, Go to Line, blank search string, or regcomp() + * failed. */ + search_replace_abort(); + return; + } else if (i == -2) { + /* No Replace. */ + do_search(); + return; + } else if (i == 1) + /* Case Sensitive, Backwards, or Regexp search toggle. */ + do_replace(); + + if (i != 0) + return; + + /* If answer is not "", add answer to the search history list and + * copy answer into last_search. */ + if (answer[0] != '\0') { +#ifndef NANO_TINY + update_history(&search_history, answer); +#endif + last_search = mallocstrcpy(last_search, answer); + } + + last_replace = mallocstrcpy(last_replace, ""); + + i = do_prompt(FALSE, +#ifndef DISABLE_TABCOMP + TRUE, +#endif + MREPLACE2, last_replace, + &meta_key, &func_key, +#ifndef NANO_TINY + &replace_history, +#endif + edit_refresh, _("Replace with")); + +#ifndef NANO_TINY + /* Add this replace string to the replace history list. i == 0 + * means that the string is not "". */ + if (i == 0) + update_history(&replace_history, answer); +#endif + + if (i != 0 && i != -2) { + if (i == -1) { /* Cancel. */ + if (last_replace[0] != '\0') + answer = mallocstrcpy(answer, last_replace); + statusbar(_("Cancelled")); + } + search_replace_abort(); + return; + } + + last_replace = mallocstrcpy(last_replace, answer); + + /* Save where we are. */ + edittop_save = openfile->edittop; + begin = openfile->current; + begin_x = openfile->current_x; + pww_save = openfile->placewewant; + + numreplaced = do_replace_loop( +#ifndef DISABLE_SPELLER + FALSE, +#endif + NULL, begin, &begin_x, last_search); + + /* Restore where we were. */ + openfile->edittop = edittop_save; + openfile->current = begin; + openfile->current_x = begin_x; + openfile->placewewant = pww_save; + + edit_refresh(); + + if (numreplaced >= 0) + statusbar(P_("Replaced %lu occurrence", + "Replaced %lu occurrences", (unsigned long)numreplaced), + (unsigned long)numreplaced); + + search_replace_abort(); +} + +/* Go to the specified line and column, or ask for them if interactive + * is TRUE. Save the x-coordinate and y-coordinate if save_pos is TRUE. + * Update the screen afterwards if allow_update is TRUE. Note that both + * the line and column numbers should be one-based. */ +void do_gotolinecolumn(ssize_t line, ssize_t column, bool use_answer, + bool interactive, bool save_pos, bool allow_update) +{ + bool meta_key = FALSE, func_key = FALSE; + const sc *s; + + if (interactive) { + char *ans = mallocstrcpy(NULL, answer); + + /* Ask for the line and column. */ + int i = do_prompt(FALSE, +#ifndef DISABLE_TABCOMP + TRUE, +#endif + MGOTOLINE, use_answer ? ans : "", + &meta_key, &func_key, +#ifndef NANO_TINY + NULL, +#endif + edit_refresh, _("Enter line number, column number")); + + free(ans); + + /* Cancel, or Enter with blank string. */ + if (i < 0) { + statusbar(_("Cancelled")); + display_main_list(); + return; + } + + + s = get_shortcut(currmenu, &i, &meta_key, &func_key); + if (s && s->scfunc == gototext_void) { + /* Keep answer up on the statusbar. */ + search_init(TRUE, TRUE); + + do_search(); + return; + } + + /* Do a bounds check. Display a warning on an out-of-bounds + * line or column number only if we hit Enter at the statusbar + * prompt. */ + if (!parse_line_column(answer, &line, &column) || line < 1 || + column < 1) { + if (i == 0) + statusbar(_("Invalid line or column number")); + display_main_list(); + return; + } + } else { + if (line < 1) + line = openfile->current->lineno; + + if (column < 1) + column = openfile->placewewant + 1; + } + + for (openfile->current = openfile->fileage; + openfile->current != openfile->filebot && line > 1; line--) + openfile->current = openfile->current->next; + + openfile->current_x = actual_x(openfile->current->data, column - 1); + openfile->placewewant = column - 1; + + /* Put the top line of the edit window in range of the current line. + * If save_pos is TRUE, don't change the cursor position when doing + * it. */ + edit_update(save_pos ? NONE : CENTER); + + /* If allow_update is TRUE, update the screen. */ + if (allow_update) + edit_refresh(); + + display_main_list(); +} + +/* Go to the specified line and column, asking for them beforehand. */ +void do_gotolinecolumn_void(void) +{ + do_gotolinecolumn(openfile->current->lineno, + openfile->placewewant + 1, FALSE, TRUE, FALSE, TRUE); +} + +#ifndef DISABLE_SPELLER +/* Go to the line with the number specified in pos_line, the + * x-coordinate specified in pos_x, the y-coordinate specified in pos_y, + * and the place we want specified in pos_pww. */ +void do_gotopos(ssize_t pos_line, size_t pos_x, ssize_t pos_y, size_t + pos_pww) +{ + /* Since do_gotolinecolumn() resets the x-coordinate but not the + * y-coordinate, set the coordinates up this way. */ + openfile->current_y = pos_y; + do_gotolinecolumn(pos_line, pos_x + 1, FALSE, FALSE, TRUE, TRUE); + + /* Set the rest of the coordinates up. */ + openfile->placewewant = pos_pww; + update_line(openfile->current, pos_x); +} +#endif + +#ifndef NANO_TINY +/* Search for a match to one of the two characters in bracket_set. If + * reverse is TRUE, search backwards for the leftmost bracket. + * Otherwise, search forwards for the rightmost bracket. Return TRUE if + * we found a match, and FALSE otherwise. */ +bool find_bracket_match(bool reverse, const char *bracket_set) +{ + filestruct *fileptr = openfile->current; + const char *rev_start = NULL, *found = NULL; + ssize_t current_y_find = openfile->current_y; + + assert(mbstrlen(bracket_set) == 2); + + /* rev_start might end up 1 character before the start or after the + * end of the line. This won't be a problem because we'll skip over + * it below in that case, and rev_start will be properly set when + * the search continues on the previous or next line. */ + rev_start = reverse ? fileptr->data + (openfile->current_x - 1) : + fileptr->data + (openfile->current_x + 1); + + /* Look for either of the two characters in bracket_set. rev_start + * can be 1 character before the start or after the end of the line. + * In either case, just act as though no match is found. */ + while (TRUE) { + found = ((rev_start > fileptr->data && *(rev_start - 1) == + '\0') || rev_start < fileptr->data) ? NULL : (reverse ? + mbrevstrpbrk(fileptr->data, bracket_set, rev_start) : + mbstrpbrk(rev_start, bracket_set)); + + /* We've found a potential match. */ + if (found != NULL) + break; + + if (reverse) { + fileptr = fileptr->prev; + current_y_find--; + } else { + fileptr = fileptr->next; + current_y_find++; + } + + /* We've reached the start or end of the buffer, so get out. */ + if (fileptr == NULL) + return FALSE; + + rev_start = fileptr->data; + if (reverse) + rev_start += strlen(fileptr->data); + } + + /* We've definitely found something. */ + openfile->current = fileptr; + openfile->current_x = found - fileptr->data; + openfile->placewewant = xplustabs(); + openfile->current_y = current_y_find; + + return TRUE; +} + +/* Search for a match to the bracket at the current cursor position, if + * there is one. */ +void do_find_bracket(void) +{ + filestruct *current_save; + size_t current_x_save, pww_save; + const char *ch; + /* The location in matchbrackets of the bracket at the current + * cursor position. */ + int ch_len; + /* The length of ch in bytes. */ + const char *wanted_ch; + /* The location in matchbrackets of the bracket complementing + * the bracket at the current cursor position. */ + int wanted_ch_len; + /* The length of wanted_ch in bytes. */ + char *bracket_set; + /* The pair of characters in ch and wanted_ch. */ + size_t i; + /* Generic loop variable. */ + size_t matchhalf; + /* The number of single-byte characters in one half of + * matchbrackets. */ + size_t mbmatchhalf; + /* The number of multibyte characters in one half of + * matchbrackets. */ + size_t count = 1; + /* The initial bracket count. */ + bool reverse; + /* The direction we search. */ + char *found_ch; + /* The character we find. */ + + assert(mbstrlen(matchbrackets) % 2 == 0); + + ch = openfile->current->data + openfile->current_x; + + if (ch == '\0' || (ch = mbstrchr(matchbrackets, ch)) == NULL) { + statusbar(_("Not a bracket")); + return; + } + + /* Save where we are. */ + current_save = openfile->current; + current_x_save = openfile->current_x; + pww_save = openfile->placewewant; + + /* If we're on an opening bracket, which must be in the first half + * of matchbrackets, we want to search forwards for a closing + * bracket. If we're on a closing bracket, which must be in the + * second half of matchbrackets, we want to search backwards for an + * opening bracket. */ + matchhalf = 0; + mbmatchhalf = mbstrlen(matchbrackets) / 2; + + for (i = 0; i < mbmatchhalf; i++) + matchhalf += parse_mbchar(matchbrackets + matchhalf, NULL, + NULL); + + reverse = ((ch - matchbrackets) >= matchhalf); + + /* If we're on an opening bracket, set wanted_ch to the character + * that's matchhalf characters after ch. If we're on a closing + * bracket, set wanted_ch to the character that's matchhalf + * characters before ch. */ + wanted_ch = ch; + + while (mbmatchhalf > 0) { + if (reverse) + wanted_ch = matchbrackets + move_mbleft(matchbrackets, + wanted_ch - matchbrackets); + else + wanted_ch += move_mbright(wanted_ch, 0); + + mbmatchhalf--; + } + + ch_len = parse_mbchar(ch, NULL, NULL); + wanted_ch_len = parse_mbchar(wanted_ch, NULL, NULL); + + /* Fill bracket_set in with the values of ch and wanted_ch. */ + bracket_set = charalloc((mb_cur_max() * 2) + 1); + strncpy(bracket_set, ch, ch_len); + strncpy(bracket_set + ch_len, wanted_ch, wanted_ch_len); + null_at(&bracket_set, ch_len + wanted_ch_len); + + found_ch = charalloc(mb_cur_max() + 1); + + while (TRUE) { + if (find_bracket_match(reverse, bracket_set)) { + /* If we found an identical bracket, increment count. If we + * found a complementary bracket, decrement it. */ + parse_mbchar(openfile->current->data + openfile->current_x, + found_ch, NULL); + count += (strncmp(found_ch, ch, ch_len) == 0) ? 1 : -1; + + /* If count is zero, we've found a matching bracket. Update + * the screen and get out. */ + if (count == 0) { + edit_redraw(current_save, pww_save); + break; + } + } else { + /* We didn't find either an opening or closing bracket. + * Indicate this, restore where we were, and get out. */ + statusbar(_("No matching bracket")); + openfile->current = current_save; + openfile->current_x = current_x_save; + openfile->placewewant = pww_save; + break; + } + } + + /* Clean up. */ + free(bracket_set); + free(found_ch); +} + +#ifdef ENABLE_NANORC +/* Indicate whether any of the history lists have changed. */ +bool history_has_changed(void) +{ + return history_changed; +} +#endif + +/* Initialize the search and replace history lists. */ +void history_init(void) +{ + search_history = make_new_node(NULL); + search_history->data = mallocstrcpy(NULL, ""); + searchage = search_history; + searchbot = search_history; + + replace_history = make_new_node(NULL); + replace_history->data = mallocstrcpy(NULL, ""); + replaceage = replace_history; + replacebot = replace_history; +} + +/* Set the current position in the history list h to the bottom. */ +void history_reset(const filestruct *h) +{ + if (h == search_history) + search_history = searchbot; + else if (h == replace_history) + replace_history = replacebot; +} + +/* Return the first node containing the first len characters of the + * string s in the history list, starting at h_start and ending at + * h_end, or NULL if there isn't one. */ +filestruct *find_history(const filestruct *h_start, const filestruct + *h_end, const char *s, size_t len) +{ + const filestruct *p; + + for (p = h_start; p != h_end->next && p != NULL; p = p->next) { + if (strncmp(s, p->data, len) == 0) + return (filestruct *)p; + } + + return NULL; +} + +/* Update a history list. h should be the current position in the + * list. */ +void update_history(filestruct **h, const char *s) +{ + filestruct **hage = NULL, **hbot = NULL, *p; + + assert(h != NULL && s != NULL); + + if (*h == search_history) { + hage = &searchage; + hbot = &searchbot; + } else if (*h == replace_history) { + hage = &replaceage; + hbot = &replacebot; + } + + assert(hage != NULL && hbot != NULL); + + /* If this string is already in the history, delete it. */ + p = find_history(*hage, *hbot, s, strlen(s)); + + if (p != NULL) { + filestruct *foo, *bar; + + /* If the string is at the beginning, move the beginning down to + * the next string. */ + if (p == *hage) + *hage = (*hage)->next; + + /* Delete the string. */ + foo = p; + bar = p->next; + unlink_node(foo); + delete_node(foo); + if (bar != NULL) + renumber(bar); + } + + /* If the history is full, delete the beginning entry to make room + * for the new entry at the end. We assume that MAX_SEARCH_HISTORY + * is greater than zero. */ + if ((*hbot)->lineno == MAX_SEARCH_HISTORY + 1) { + filestruct *foo = *hage; + + *hage = (*hage)->next; + unlink_node(foo); + delete_node(foo); + renumber(*hage); + } + + /* Add the new entry to the end. */ + (*hbot)->data = mallocstrcpy((*hbot)->data, s); + splice_node(*hbot, make_new_node(*hbot), (*hbot)->next); + *hbot = (*hbot)->next; + (*hbot)->data = mallocstrcpy(NULL, ""); + +#ifdef ENABLE_NANORC + /* Indicate that the history's been changed. */ + history_changed = TRUE; +#endif + + /* Set the current position in the list to the bottom. */ + *h = *hbot; +} + +/* Move h to the string in the history list just before it, and return + * that string. If there isn't one, don't move h and return NULL. */ +char *get_history_older(filestruct **h) +{ + assert(h != NULL); + + if ((*h)->prev == NULL) + return NULL; + + *h = (*h)->prev; + + return (*h)->data; +} + +/* Move h to the string in the history list just after it, and return + * that string. If there isn't one, don't move h and return NULL. */ +char *get_history_newer(filestruct **h) +{ + assert(h != NULL); + + if ((*h)->next == NULL) + return NULL; + + *h = (*h)->next; + + return (*h)->data; +} + +/* More placeholders */ +void get_history_newer_void(void) +{ + ; +} +void get_history_older_void(void) +{ + ; +} + +#ifndef DISABLE_TABCOMP +/* Move h to the next string that's a tab completion of the string s, + * looking at only the first len characters of s, and return that + * string. If there isn't one, or if len is 0, don't move h and return + * s. */ +char *get_history_completion(filestruct **h, const char *s, size_t len) +{ + assert(s != NULL); + + if (len > 0) { + filestruct *hage = NULL, *hbot = NULL, *p; + + assert(h != NULL); + + if (*h == search_history) { + hage = searchage; + hbot = searchbot; + } else if (*h == replace_history) { + hage = replaceage; + hbot = replacebot; + } + + assert(hage != NULL && hbot != NULL); + + /* Search the history list from the current position to the + * bottom for a match of len characters. Skip over an exact + * match. */ + p = find_history((*h)->next, hbot, s, len); + + while (p != NULL && strcmp(p->data, s) == 0) + p = find_history(p->next, hbot, s, len); + + if (p != NULL) { + *h = p; + return (*h)->data; + } + + /* Search the history list from the top to the current position + * for a match of len characters. Skip over an exact match. */ + p = find_history(hage, *h, s, len); + + while (p != NULL && strcmp(p->data, s) == 0) + p = find_history(p->next, *h, s, len); + + if (p != NULL) { + *h = p; + return (*h)->data; + } + } + + /* If we're here, we didn't find a match, we didn't find an inexact + * match, or len is 0. Return s. */ + return (char *)s; +} +#endif /* !DISABLE_TABCOMP */ +#endif /* !NANO_TINY */ |