/**************************************************************************
* text.c -- This file is part of GNU nano. *
* *
* Copyright (C) 1999-2011, 2013-2018 Free Software Foundation, Inc. *
* Copyright (C) 2014-2015 Mark Majeres *
* Copyright (C) 2016 Mike Scalora *
* Copyright (C) 2016 Sumedh Pendurkar *
* Copyright (C) 2018 Marco Diego Aurélio Mesquita *
* Copyright (C) 2015-2018 Benno Schulenberg *
* *
* GNU nano 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 of the License, *
* or (at your option) any later version. *
* *
* GNU nano 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, see http://www.gnu.org/licenses/. *
* *
**************************************************************************/
#include "proto.h"
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <unistd.h>
#include <sys/wait.h>
#ifndef NANO_TINY
static pid_t pid = -1;
/* The PID of the forked process in execute_command(), for use
* with the cancel_command() signal handler. */
#endif
#ifdef ENABLE_WRAPPING
static bool prepend_wrap = FALSE;
/* Should we prepend wrapped text to the next line? */
#endif
#ifdef ENABLE_JUSTIFY
static filestruct *jusbuffer = NULL;
/* The buffer where we store unjustified text. */
static filestruct *jusbottom = NULL;
/* A pointer to the end of the buffer with unjustified text. */
#endif
#ifdef ENABLE_WORDCOMPLETION
static int pletion_x = 0;
/* The x position in pletion_line of the last found completion. */
static completion_word *list_of_completions;
/* A linked list of the completions that have been attempted. */
#endif
#ifndef NANO_TINY
/* Toggle the mark. */
void do_mark(void)
{
if (!openfile->mark) {
openfile->mark = openfile->current;
openfile->mark_x = openfile->current_x;
statusbar(_("Mark Set"));
openfile->kind_of_mark = HARDMARK;
} else {
openfile->mark = NULL;
statusbar(_("Mark Unset"));
refresh_needed = TRUE;
}
}
#endif /* !NANO_TINY */
#if defined(ENABLE_COLOR) || defined(ENABLE_SPELLER)
/* Return an error message containing the given name. */
char *invocation_error(const char *name)
{
char *message, *invoke_error = _("Error invoking \"%s\"");
message = charalloc(strlen(invoke_error) + strlen(name) + 1);
sprintf(message, invoke_error, name);
return message;
}
#endif
/* Delete the character under the cursor. */
void do_deletion(undo_type action)
{
#ifndef NANO_TINY
size_t old_amount = 0;
#endif
openfile->placewewant = xplustabs();
if (openfile->current->data[openfile->current_x] != '\0') {
/* We're in the middle of a line: delete the current character. */
int char_len = parse_mbchar(openfile->current->data +
openfile->current_x, NULL, NULL);
size_t line_len = strlen(openfile->current->data +
openfile->current_x);
#ifndef NANO_TINY
update_undo(action);
if (ISSET(SOFTWRAP))
old_amount = number_of_chunks_in(openfile->current);
#endif
/* Move the remainder of the line "in", over the current character. */
charmove(&openfile->current->data[openfile->current_x],
&openfile->current->data[openfile->current_x + char_len],
line_len - char_len + 1);
#ifndef NANO_TINY
/* Adjust the mark if it is after the cursor on the current line. */
if (openfile->mark == openfile->current &&
openfile->mark_x > openfile->current_x)
openfile->mark_x -= char_len;
#endif
/* Adjust the file size. */
openfile->totsize--;
} else if (openfile->current != openfile->filebot) {
/* We're at the end of a line and not at the end of the file: join
* this line with the next. */
filestruct *joining = openfile->current->next;
/* If there is a magic line, and we're before it: don't eat it. */
if (joining == openfile->filebot && openfile->current_x != 0 &&
!ISSET(NO_NEWLINES)) {
#ifndef NANO_TINY
if (action == BACK)
add_undo(BACK);
#endif
return;
}
#ifndef NANO_TINY
add_undo(action);
#endif
/* Add the contents of the next line to those of the current one. */
openfile->current->data = charealloc(openfile->current->data,
strlen(openfile->current->data) + strlen(joining->data) + 1);
strcat(openfile->current->data, joining->data);
/* Adjust the file size. */
openfile->totsize--;
#ifndef NANO_TINY
/* Remember the new file size for a possible redo. */
openfile->current_undo->newsize = openfile->totsize;
/* Adjust the mark if it was on the line that was "eaten". */
if (openfile->mark == joining) {
openfile->mark = openfile->current;
openfile->mark_x += openfile->current_x;
}
#endif
unlink_node(joining);
renumber(openfile->current);
/* Two lines were joined, so we need to refresh the screen. */
refresh_needed = TRUE;
} else
/* We're at the end-of-file: nothing to do. */
return;
#ifndef NANO_TINY
/* If the number of screen rows that a softwrapped line occupies
* has changed, we need a full refresh. */
if (ISSET(SOFTWRAP) && refresh_needed == FALSE &&
number_of_chunks_in(openfile->current) != old_amount)
refresh_needed = TRUE;
#endif
set_modified();
}
/* Delete the character under the cursor. */
void do_delete(void)
{
do_deletion(DEL);
}
/* Backspace over one character. That is, move the cursor left one
* character, and then delete the character under the cursor. */
void do_backspace(void)
{
if (openfile->current != openfile->fileage || openfile->current_x > 0) {
do_left();
do_deletion(BACK);
}
}
#ifndef NANO_TINY
/* Delete text from the cursor until the first start of a word to
* the right, or to the left when backward is true. */
void do_cutword(bool backward)
{
/* Remember the current cursor position. */
filestruct *is_current = openfile->current;
size_t is_current_x = openfile->current_x;
/* Remember where the cutbuffer is and then make it seem blank. */
filestruct *is_cutbuffer = cutbuffer;
filestruct *is_cutbottom = cutbottom;
cutbuffer = NULL;
cutbottom = NULL;
/* Move the cursor to a word start, to the left or to the right. */
if (backward)
do_prev_word(ISSET(WORD_BOUNDS), FALSE);
else
do_next_word(FALSE, ISSET(WORD_BOUNDS), FALSE);
/* Set the mark at the start of that word. */
openfile->mark = openfile->current;
openfile->mark_x = openfile->current_x;
/* Put the cursor back where it was, so an undo will put it there too. */
openfile->current = is_current;
openfile->current_x = is_current_x;
/* Now kill the marked region and a word is gone. */
do_cut_text_void();
/* Discard the cut word and restore the cutbuffer. */
free_filestruct(cutbuffer);
cutbuffer = is_cutbuffer;
cutbottom = is_cutbottom;
}
/* Delete a word leftward. */
void do_cut_prev_word(void)
{
do_cutword(TRUE);
}
/* Delete a word rightward. */
void do_cut_next_word(void)
{
do_cutword(FALSE);
}
#endif /* !NANO_TINY */
/* Insert a tab. If the TABS_TO_SPACES flag is set, insert the number
* of spaces that a tab would normally take up. */
void do_tab(void)
{
#ifndef NANO_TINY
if (ISSET(TABS_TO_SPACES)) {
char *spaces = charalloc(tabsize + 1);
size_t length = tabsize - (xplustabs() % tabsize);
charset(spaces, ' ', length);
spaces[length] = '\0';
do_output(spaces, length, TRUE);
free(spaces);
} else
#endif
do_output((char *)"\t", 1, TRUE);
}
#ifndef NANO_TINY
/* Add an indent to the given line. */
void indent_a_line(filestruct *line, char *indentation)
{
size_t length = strlen(line->data);
size_t indent_len = strlen(indentation);
/* If the indent is empty, don't change the line. */
if (indent_len == 0)
return;
/* Add the fabricated indentation to the beginning of the line. */
line->data = charealloc(line->data, length + indent_len + 1);
charmove(line->data + indent_len, line->data, length + 1);
strncpy(line->data, indentation, indent_len);
openfile->totsize += indent_len;
/* Compensate for the change in the current line. */
if (line == openfile->mark && openfile->mark_x > 0)
openfile->mark_x += indent_len;
if (line == openfile->current && openfile->current_x > 0) {
openfile->current_x += indent_len;
openfile->placewewant = xplustabs();
}
}
/* Indent the current line (or the marked lines) by tabsize columns.
* This inserts either a tab character or a tab's worth of spaces,
* depending on whether --tabstospaces is in effect. */
void do_indent(void)
{
char *indentation;
filestruct *top, *bot, *line;
/* Use either all the marked lines or just the current line. */
get_range((const filestruct **)&top, (const filestruct **)&bot);
/* Skip any leading empty lines. */
while (top != bot->next && top->data[0] == '\0')
top = top->next;
/* If all lines are empty, there is nothing to do. */
if (top == bot->next)
return;
indentation = charalloc(tabsize + 1);
/* Set the indentation to either a bunch of spaces or a single tab. */
if (ISSET(TABS_TO_SPACES)) {
charset(indentation, ' ', tabsize);
indentation[tabsize] = '\0';
} else {
indentation[0] = '\t';
indentation[1] = '\0';
}
add_undo(INDENT);
/* Go through each of the lines, adding an indent to the non-empty ones,
* and recording whatever was added in the undo item. */
for (line = top; line != bot->next; line = line->next) {
char *real_indent = (line->data[0] == '\0') ? "" : indentation;
indent_a_line(line, real_indent);
update_multiline_undo(line->lineno, real_indent);
}
free(indentation);
set_modified();
refresh_needed = TRUE;
shift_held = TRUE;
}
/* Return the number of bytes of whitespace at the start of the given text,
* but at most a tab's worth. */
size_t length_of_white(const char *text)
{
size_t bytes_of_white = 0;
while (TRUE) {
if (*text == '\t')
return ++bytes_of_white;
if (*text != ' ')
return bytes_of_white;
if (++bytes_of_white == tabsize)
return tabsize;
text++;
}
}
/* Adjust the positions of mark and cursor when they are on the given line. */
void compensate_leftward(filestruct *line, size_t leftshift)
{
if (line == openfile->mark) {
if (openfile->mark_x < leftshift)
openfile->mark_x = 0;
else
openfile->mark_x -= leftshift;
}
if (line == openfile->current) {
if (openfile->current_x < leftshift)
openfile->current_x = 0;
else
openfile->current_x -= leftshift;
openfile->placewewant = xplustabs();
}
}
/* Remove an indent from the given line. */
void unindent_a_line(filestruct *line, size_t indent_len)
{
size_t length = strlen(line->data);
/* If the indent is empty, don't change the line. */
if (indent_len == 0)
return;
/* Remove the first tab's worth of whitespace from this line. */
charmove(line->data, line->data + indent_len, length - indent_len + 1);
openfile->totsize -= indent_len;
/* Adjust the positions of mark and cursor, when they are affected. */
compensate_leftward(line, indent_len);
}
/* Unindent the current line (or the marked lines) by tabsize columns.
* The removed indent can be a mixture of spaces plus at most one tab. */
void do_unindent(void)
{
filestruct *top, *bot, *line;
/* Use either all the marked lines or just the current line. */
get_range((const filestruct **)&top, (const filestruct **)&bot);
/* Skip any leading lines that cannot be unindented. */
while (top != bot->next && length_of_white(top->data) == 0)
top = top->next;
/* If none of the lines can be unindented, there is nothing to do. */
if (top == bot->next)
return;
add_undo(UNINDENT);
/* Go through each of the lines, removing their leading indent where
* possible, and saving the removed whitespace in the undo item. */
for (line = top; line != bot->next; line = line->next) {
size_t indent_len = length_of_white(line->data);
char *indentation = mallocstrncpy(NULL, line->data, indent_len + 1);
indentation[indent_len] = '\0';
unindent_a_line(line, indent_len);
update_multiline_undo(line->lineno, indentation);
free(indentation);
}
set_modified();
refresh_needed = TRUE;
shift_held = TRUE;
}
/* Perform an undo or redo for an indent or unindent action. */
void handle_indent_action(undo *u, bool undoing, bool add_indent)
{
undo_group *group = u->grouping;
filestruct *line = fsfromline(group->top_line);
if (group->next != NULL)
statusline(ALERT, "Multiple groups -- please report a bug");
/* When redoing, reposition the cursor and let the indenter adjust it. */
if (!undoing)
goto_line_posx(u->lineno, u->begin);
/* For each line in the group, add or remove the individual indent. */
while (line && line->lineno <= group->bottom_line) {
char *blanks = group->indentations[line->lineno - group->top_line];
if (undoing ^ add_indent)
indent_a_line(line, blanks);
else
unindent_a_line(line, strlen(blanks));
line = line->next;
}
/* When undoing, reposition the cursor to the recorded location. */
if (undoing)
goto_line_posx(u->lineno, u->begin);
refresh_needed = TRUE;
}
#endif /* !NANO_TINY */
/* Test whether the string is empty or consists of only blanks. */
bool white_string(const char *s)
{
while (*s != '\0' && (is_blank_mbchar(s) || *s == '\r'))
s += move_mbright(s, 0);
return !*s;
}
#ifdef ENABLE_COMMENT
/* Test whether the given line can be uncommented, or add or remove a comment,
* depending on action. Return TRUE if the line is uncommentable, or when
* anything was added or removed; FALSE otherwise. */
bool comment_line(undo_type action, filestruct *line, const char *comment_seq)
{
size_t comment_seq_len = strlen(comment_seq);
const char *post_seq = strchr(comment_seq, '|');
/* The postfix, if this is a bracketing type comment sequence. */
size_t pre_len = post_seq ? post_seq++ - comment_seq : comment_seq_len;
/* Length of prefix. */
size_t post_len = post_seq ? comment_seq_len - pre_len - 1 : 0;
/* Length of postfix. */
size_t line_len = strlen(line->data);
if (!ISSET(NO_NEWLINES) && line == openfile->filebot)
return FALSE;
if (action == COMMENT) {
/* Make room for the comment sequence(s), move the text right and
* copy them in. */
line->data = charealloc(line->data, line_len + pre_len + post_len + 1);
charmove(line->data + pre_len, line->data, line_len + 1);
charmove(line->data, comment_seq, pre_len);
if (post_len > 0)
charmove(line->data + pre_len + line_len, post_seq, post_len + 1);
openfile->totsize += pre_len + post_len;
/* If needed, adjust the position of the mark and of the cursor. */
if (line == openfile->mark && openfile->mark_x > 0)
openfile->mark_x += pre_len;
if (line == openfile->current && openfile->current_x > 0) {
openfile->current_x += pre_len;
openfile->placewewant = xplustabs();
}
return TRUE;
}
/* If the line is commented, report it as uncommentable, or uncomment it. */
if (strncmp(line->data, comment_seq, pre_len) == 0 && (post_len == 0 ||
strcmp(line->data + line_len - post_len, post_seq) == 0)) {
if (action == PREFLIGHT)
return TRUE;
/* Erase the comment prefix by moving the non-comment part. */
charmove(line->data, line->data + pre_len, line_len - pre_len);
/* Truncate the postfix if there was one. */
line->data[line_len - pre_len - post_len] = '\0';
openfile->totsize -= pre_len + post_len;
/* Adjust the positions of mark and cursor, when needed. */
compensate_leftward(line, pre_len);
return TRUE;
}
return FALSE;
}
/* Comment or uncomment the current line or the marked lines. */
void do_comment(void)
{
const char *comment_seq = GENERAL_COMMENT_CHARACTER;
undo_type action = UNCOMMENT;
filestruct *top, *bot, *line;
bool empty, all_empty = TRUE;
#ifdef ENABLE_COLOR
if (openfile->syntax)
comment_seq = openfile->syntax->comment;
if (*comment_seq == '\0') {
statusbar(_("Commenting is not supported for this file type"));
return;
}
#endif
/* Determine which lines to work on. */
get_range((const filestruct **)&top, (const filestruct **)&bot);
/* If only the magic line is selected, don't do anything. */
if (top == bot && bot == openfile->filebot && !ISSET(NO_NEWLINES)) {
statusbar(_("Cannot comment past end of file"));
return;
}
/* Figure out whether to comment or uncomment the selected line or lines. */
for (line = top; line != bot->next; line = line->next) {
empty = white_string(line->data);
/* If this line is not blank and not commented, we comment all. */
if (!empty && !comment_line(PREFLIGHT, line, comment_seq)) {
action = COMMENT;
break;
}
all_empty = all_empty && empty;
}
/* If all selected lines are blank, we comment them. */
action = all_empty ? COMMENT : action;
add_undo(action);
/* Store the comment sequence used for the operation, because it could
* change when the file name changes; we need to know what it was. */
openfile->current_undo->strdata = mallocstrcpy(NULL, comment_seq);
/* Comment/uncomment each of the selected lines when possible, and
* store undo data when a line changed. */
for (line = top; line != bot->next; line = line->next) {
if (comment_line(action, line, comment_seq))
update_multiline_undo(line->lineno, "");
}
set_modified();
refresh_needed = TRUE;
shift_held = TRUE;
}
/* Perform an undo or redo for a comment or uncomment action. */
void handle_comment_action(undo *u, bool undoing, bool add_comment)
{
undo_group *group = u->grouping;
/* When redoing, reposition the cursor and let the commenter adjust it. */
if (!undoing)
goto_line_posx(u->lineno, u->begin);
while (group) {
filestruct *f = fsfromline(group->top_line);
while (f && f->lineno <= group->bottom_line) {
comment_line(undoing ^ add_comment ?
COMMENT : UNCOMMENT, f, u->strdata);
f = f->next;
}
group = group->next;
}
/* When undoing, reposition the cursor to the recorded location. */
if (undoing)
goto_line_posx(u->lineno, u->begin);
refresh_needed = TRUE;
}
#endif /* ENABLE_COMMENT */
#ifndef NANO_TINY
#define redo_paste undo_cut
#define undo_paste redo_cut
/* Undo a cut, or redo an uncut. */
void undo_cut(undo *u)
{
/* If we cut the magicline, we may as well not crash. :/ */
if (!u->cutbuffer)
return;
/* Get to where we need to uncut from. */
if (u->xflags == WAS_WHOLE_LINE)
goto_line_posx(u->mark_begin_lineno, 0);
else
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
copy_from_buffer(u->cutbuffer);
if (u->xflags != WAS_MARKED_FORWARD && u->type != PASTE)
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
}
/* Redo a cut, or undo an uncut. */
void redo_cut(undo *u)
{
filestruct *oldcutbuffer = cutbuffer, *oldcutbottom = cutbottom;
/* If we cut the magicline, we may as well not crash. :/ */
if (!u->cutbuffer)
return;
cutbuffer = NULL;
cutbottom = NULL;
goto_line_posx(u->lineno, u->begin);
openfile->mark = fsfromline(u->mark_begin_lineno);
openfile->mark_x = (u->xflags == WAS_WHOLE_LINE) ? 0 : u->mark_begin_x;
do_cut_text(FALSE, FALSE);
free_filestruct(cutbuffer);
cutbuffer = oldcutbuffer;
cutbottom = oldcutbottom;
}
/* Undo the last thing(s) we did. */
void do_undo(void)
{
undo *u = openfile->current_undo;
filestruct *f = NULL, *t = NULL;
filestruct *oldcutbuffer, *oldcutbottom;
char *data, *undidmsg = NULL;
size_t from_x, to_x;
if (!u) {
statusbar(_("Nothing in undo buffer!"));
return;
}
if (u->type <= REPLACE) {
f = fsfromline(u->mark_begin_lineno);
if (f == NULL)
return;
}
#ifdef DEBUG
fprintf(stderr, " >> Undoing a type %d...\n", u->type);
#endif
openfile->current_x = u->begin;
switch (u->type) {
case ADD:
/* TRANSLATORS: The next thirteen strings describe actions
* that are undone or redone. They are all nouns, not verbs. */
undidmsg = _("text add");
if (u->xflags == WAS_FINAL_LINE && !ISSET(NO_NEWLINES))
remove_magicline();
data = charalloc(strlen(f->data) - strlen(u->strdata) + 1);
strncpy(data, f->data, u->begin);
strcpy(&data[u->begin], &f->data[u->begin + strlen(u->strdata)]);
free(f->data);
f->data = data;
goto_line_posx(u->lineno, u->begin);
break;
case ENTER:
if (f->next == NULL) {
statusline(ALERT, "Missing break line -- please report a bug");
break;
}
undidmsg = _("line break");
from_x = (u->begin == 0) ? 0 : u->mark_begin_x;
to_x = (u->begin == 0) ? u->mark_begin_x : u->begin;
f->data = charealloc(f->data, strlen(f->data) +
strlen(&u->strdata[from_x]) + 1);
strcat(f->data, &u->strdata[from_x]);
unlink_node(f->next);
renumber(f);
goto_line_posx(u->lineno, to_x);
break;
case BACK:
case DEL:
undidmsg = _("text delete");
data = charalloc(strlen(f->data) + strlen(u->strdata) + 1);
strncpy(data, f->data, u->begin);
strcpy(&data[u->begin], u->strdata);
strcpy(&data[u->begin + strlen(u->strdata)], &f->data[u->begin]);
free(f->data);
f->data = data;
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
break;
case JOIN:
undidmsg = _("line join");
/* When the join was done by a Backspace at the tail of the file,
* and the nonewlines flag isn't set, do not re-add a newline that
* wasn't actually deleted; just position the cursor. */
if (u->xflags == WAS_FINAL_BACKSPACE && !ISSET(NO_NEWLINES)) {
goto_line_posx(openfile->filebot->lineno, 0);
break;
}
t = make_new_node(f);
t->data = mallocstrcpy(NULL, u->strdata);
data = mallocstrncpy(NULL, f->data, u->mark_begin_x + 1);
data[u->mark_begin_x] = '\0';
free(f->data);
f->data = data;
splice_node(f, t);
renumber(t);
goto_line_posx(u->lineno, u->begin);
break;
case REPLACE:
undidmsg = _("text replace");
goto_line_posx(u->lineno, u->begin);
data = u->strdata;
u->strdata = f->data;
f->data = data;
break;
#ifdef ENABLE_WRAPPING
case SPLIT_END:
goto_line_posx(u->lineno, u->begin);
openfile->current_undo = openfile->current_undo->next;
openfile->last_action = OTHER;
while (openfile->current_undo->type != SPLIT_BEGIN)
do_undo();
u = openfile->current_undo;
case SPLIT_BEGIN:
undidmsg = _("text add");
break;
#endif
case CUT_TO_EOF:
case CUT:
undidmsg = _("text cut");
undo_cut(u);
break;
case PASTE:
undidmsg = _("text uncut");
undo_paste(u);
break;
case INSERT:
undidmsg = _("text insert");
oldcutbuffer = cutbuffer;
oldcutbottom = cutbottom;
cutbuffer = NULL;
cutbottom = NULL;
openfile->mark = fsfromline(u->mark_begin_lineno);
openfile->mark_x = u->mark_begin_x;
goto_line_posx(u->lineno, u->begin);
cut_marked(NULL);
free_filestruct(u->cutbuffer);
u->cutbuffer = cutbuffer;
u->cutbottom = cutbottom;
cutbuffer = oldcutbuffer;
cutbottom = oldcutbottom;
break;
case COUPLE_BEGIN:
undidmsg = _("filtering");
break;
case COUPLE_END:
openfile->current_undo = openfile->current_undo->next;
do_undo();
do_undo();
do_undo();
return;
case INDENT:
handle_indent_action(u, TRUE, TRUE);
undidmsg = _("indent");
break;
case UNINDENT:
handle_indent_action(u, TRUE, FALSE);
undidmsg = _("unindent");
break;
#ifdef ENABLE_COMMENT
case COMMENT:
handle_comment_action(u, TRUE, TRUE);
undidmsg = _("comment");
break;
case UNCOMMENT:
handle_comment_action(u, TRUE, FALSE);
undidmsg = _("uncomment");
break;
#endif
default:
statusline(ALERT, "Wrong undo type -- please report a bug");
break;
}
if (undidmsg && !pletion_line)
statusline(HUSH, _("Undid action (%s)"), undidmsg);
openfile->current_undo = openfile->current_undo->next;
openfile->last_action = OTHER;
openfile->mark = NULL;
openfile->placewewant = xplustabs();
openfile->totsize = u->wassize;
/* When at the point where the file was last saved, unset "Modified". */
if (openfile->current_undo == openfile->last_saved) {
openfile->modified = FALSE;
titlebar(NULL);
} else
set_modified();
}
/* Redo the last thing(s) we undid. */
void do_redo(void)
{
filestruct *f = NULL, *shoveline;
char *data, *redidmsg = NULL;
undo *u = openfile->undotop;
if (u == NULL || u == openfile->current_undo) {
statusbar(_("Nothing to re-do!"));
return;
}
/* Get the previous undo item. */
while (u != NULL && u->next != openfile->current_undo)
u = u->next;
if (u->next != openfile->current_undo) {
statusline(ALERT, "Bad undo stack -- please report a bug");
return;
}
if (u->type <= REPLACE) {
f = fsfromline(u->mark_begin_lineno);
if (f == NULL)
return;
}
#ifdef DEBUG
fprintf(stderr, " >> Redoing a type %d...\n", u->type);
#endif
switch (u->type) {
case ADD:
redidmsg = _("text add");
if (u->xflags == WAS_FINAL_LINE && !ISSET(NO_NEWLINES))
new_magicline();
data = charalloc(strlen(f->data) + strlen(u->strdata) + 1);
strncpy(data, f->data, u->begin);
strcpy(&data[u->begin], u->strdata);
strcpy(&data[u->begin + strlen(u->strdata)], &f->data[u->begin]);
free(f->data);
f->data = data;
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
break;
case ENTER:
redidmsg = _("line break");
shoveline = make_new_node(f);
shoveline->data = mallocstrcpy(NULL, u->strdata);
data = mallocstrncpy(NULL, f->data, u->begin + 1);
data[u->begin] = '\0';
free(f->data);
f->data = data;
splice_node(f, shoveline);
renumber(shoveline);
goto_line_posx(u->lineno + 1, u->mark_begin_x);
break;
case BACK:
case DEL:
redidmsg = _("text delete");
data = charalloc(strlen(f->data) + strlen(u->strdata) + 1);
strncpy(data, f->data, u->begin);
strcpy(&data[u->begin], &f->data[u->begin + strlen(u->strdata)]);
free(f->data);
f->data = data;
goto_line_posx(u->lineno, u->begin);
break;
case JOIN:
if (f->next == NULL) {
statusline(ALERT, "Missing join line -- please report a bug");
break;
}
redidmsg = _("line join");
/* When the join was done by a Backspace at the tail of the file,
* and the nonewlines flag isn't set, do not join anything, as
* nothing was actually deleted; just position the cursor. */
if (u->xflags == WAS_FINAL_BACKSPACE && !ISSET(NO_NEWLINES)) {
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
break;
}
f->data = charealloc(f->data, strlen(f->data) + strlen(u->strdata) + 1);
strcat(f->data, u->strdata);
unlink_node(f->next);
renumber(f);
goto_line_posx(u->mark_begin_lineno, u->mark_begin_x);
break;
case REPLACE:
redidmsg = _("text replace");
data = u->strdata;
u->strdata = f->data;
f->data = data;
goto_line_posx(u->lineno, u->begin);
break;
#ifdef ENABLE_WRAPPING
case SPLIT_BEGIN:
goto_line_posx(u->lineno, u->begin);
openfile->current_undo = u;
openfile->last_action = OTHER;
while (openfile->current_undo->type != SPLIT_END)
do_redo();
u = openfile->current_undo;
goto_line_posx(u->lineno, u->begin);
case SPLIT_END:
redidmsg = _("text add");
break;
#endif
case CUT_TO_EOF:
case CUT:
redidmsg = _("text cut");
redo_cut(u);
break;
case PASTE:
redidmsg = _("text uncut");
redo_paste(u);
break;
case INSERT:
redidmsg = _("text insert");
goto_line_posx(u->lineno, u->begin);
copy_from_buffer(u->cutbuffer);
free_filestruct(u->cutbuffer);
u->cutbuffer = NULL;
break;
case COUPLE_BEGIN:
openfile->current_undo = u;
do_redo();
do_redo();
do_redo();
return;
case COUPLE_END:
redidmsg = _("filtering");
break;
case INDENT:
handle_indent_action(u, FALSE, TRUE);
redidmsg = _("indent");
break;
case UNINDENT:
handle_indent_action(u, FALSE, FALSE);
redidmsg = _("unindent");
break;
#ifdef ENABLE_COMMENT
case COMMENT:
handle_comment_action(u, FALSE, TRUE);
redidmsg = _("comment");
break;
case UNCOMMENT:
handle_comment_action(u, FALSE, FALSE);
redidmsg = _("uncomment");
break;
#endif
default:
statusline(ALERT, "Wrong redo type -- please report a bug");
break;
}
if (redidmsg)
statusline(HUSH, _("Redid action (%s)"), redidmsg);
openfile->current_undo = u;
openfile->last_action = OTHER;
openfile->mark = NULL;
openfile->placewewant = xplustabs();
openfile->totsize = u->newsize;
/* When at the point where the file was last saved, unset "Modified". */
if (openfile->current_undo == openfile->last_saved) {
openfile->modified = FALSE;
titlebar(NULL);
} else
set_modified();
}
#endif /* !NANO_TINY */
/* Break the current line at the cursor position. */
void do_enter(void)
{
filestruct *newnode = make_new_node(openfile->current);
size_t extra = 0;
#ifndef NANO_TINY
filestruct *sampleline = openfile->current;
bool allblanks = FALSE;
if (ISSET(AUTOINDENT)) {
#ifdef ENABLE_JUSTIFY
/* When doing automatic long-line wrapping and the next line is
* in this same paragraph, use its indentation as the model. */
if (!ISSET(NO_WRAP) && sampleline->next != NULL &&
inpar(sampleline->next) && !begpar(sampleline->next, 0))
sampleline = sampleline->next;
#endif
extra = indent_length(sampleline->data);
/* When breaking in the indentation, limit the automatic one. */
if (extra > openfile->current_x)
extra = openfile->current_x;
else if (extra == openfile->current_x)
allblanks = TRUE;
}
#endif /* NANO_TINY */
newnode->data = charalloc(strlen(openfile->current->data +
openfile->current_x) + extra + 1);
strcpy(&newnode->data[extra], openfile->current->data +
openfile->current_x);
#ifndef NANO_TINY
if (ISSET(AUTOINDENT)) {
/* Copy the whitespace from the sample line to the new one. */
strncpy(newnode->data, sampleline->data, extra);
/* If there were only blanks before the cursor, trim them. */
if (allblanks)
openfile->current_x = 0;
else
openfile->totsize += extra;
}
#endif
null_at(&openfile->current->data, openfile->current_x);
#ifndef NANO_TINY
add_undo(ENTER);
/* Adjust the mark if it was on the current line after the cursor. */
if (openfile->mark == openfile->current &&
openfile->mark_x > openfile->current_x) {
openfile->mark = newnode;
openfile->mark_x += extra - openfile->current_x;
}
#endif
/* Insert the newly created line after the current one and renumber. */
splice_node(openfile->current, newnode);
renumber(newnode);
/* Put the cursor on the new line, after any automatic whitespace. */
openfile->current = newnode;
openfile->current_x = extra;
openfile->placewewant = xplustabs();
openfile->totsize++;
set_modified();
#ifndef NANO_TINY
update_undo(ENTER);
#endif
refresh_needed = TRUE;
focusing = FALSE;
}
#ifndef NANO_TINY
/* Send a SIGKILL (unconditional kill) to the forked process in
* execute_command(). */
RETSIGTYPE cancel_command(int signal)
{
if (kill(pid, SIGKILL) == -1)
nperror("kill");
}
/* Send the text that starts at the given line to file descriptor fd. */
void send_data(const filestruct *line, int fd)
{
FILE *tube = fdopen(fd, "w");
if (tube == NULL)
return;
/* Send each line, except a final empty line. */
while (line != NULL && (line->next != NULL || line->data[0] != '\0')) {
fprintf(tube, "%s%s", line->data, line->next == NULL ? "" : "\n");
line = line->next;
}
fclose(tube);
}
/* Execute the given command in a shell. Return TRUE on success. */
bool execute_command(const char *command)
{
int from_fd[2], to_fd[2];
/* The pipes through which text will written and read. */
const bool should_pipe = (command[0] == '|');
FILE *stream;
const char *shellenv;
struct sigaction oldaction, newaction;
/* Original and temporary handlers for SIGINT. */
bool setup_failed = FALSE;
/* Whether setting up the temporary SIGINT handler failed. */
/* Create a pipe to read the command's output from, and, if needed,
* a pipe to feed the command's input through. */
if (pipe(from_fd) == -1 || (should_pipe && pipe(to_fd) == -1)) {
statusbar(_("Could not create pipe"));
return FALSE;
}
/* Check which shell to use. If none is specified, use /bin/sh. */
shellenv = getenv("SHELL");
if (shellenv == NULL)
shellenv = (char *) "/bin/sh";
/* Fork a child process to run the command in. */
if ((pid = fork()) == 0) {
/* Child: close the unused read end of the output pipe. */
close(from_fd[0]);
/* Connect the write end of the output pipe to the process' output streams. */
dup2(from_fd[1], fileno(stdout));
dup2(from_fd[1], fileno(stderr));
/* If the parent sends text, connect the read end of the
* feeding pipe to the child's input stream. */
if (should_pipe) {
dup2(to_fd[0], fileno(stdin));
close(to_fd[1]);
}
/* Run the given command inside the preferred shell. */
execl(shellenv, tail(shellenv), "-c", should_pipe ? &command[1] : command, NULL);
/* If the exec call returns, there was an error. */
exit(1);
}
/* Parent: close the unused write end of the pipe. */
close(from_fd[1]);
if (pid == -1) {
statusbar(_("Could not fork"));
close(from_fd[0]);
return FALSE;
}
/* If the command starts with "|", pipe buffer or region to the command. */
if (should_pipe) {
filestruct *was_cutbuffer = cutbuffer;
cutbuffer = NULL;
#ifdef ENABLE_MULTIBUFFER
if (ISSET(MULTIBUFFER)) {
switch_to_prev_buffer();
if (openfile->mark)
do_cut_text(TRUE, FALSE);
} else
#endif
{
add_undo(COUPLE_BEGIN);
if (openfile->mark == NULL) {
openfile->current = openfile->fileage;
openfile->current_x = 0;
}
add_undo(CUT);
do_cut_text(FALSE, openfile->mark == NULL);
update_undo(CUT);
}
if (fork() == 0) {
close(to_fd[0]);
send_data(cutbuffer != NULL ? cutbuffer : openfile->fileage, to_fd[1]);
close(to_fd[1]);
exit(0);
}
close(to_fd[0]);
close(to_fd[1]);
#ifdef ENABLE_MULTIBUFFER
if (ISSET(MULTIBUFFER))
switch_to_next_buffer();
#endif
free_filestruct(cutbuffer);
cutbuffer = was_cutbuffer;
}
/* Re-enable interpretation of the special control keys so that we get
* SIGINT when Ctrl-C is pressed. */
enable_signals();
/* Set things up so that Ctrl-C will terminate the forked process. */
if (sigaction(SIGINT, NULL, &newaction) == -1) {
setup_failed = TRUE;
nperror("sigaction");
} else {
newaction.sa_handler = cancel_command;
if (sigaction(SIGINT, &newaction, &oldaction) == -1) {
setup_failed = TRUE;
nperror("sigaction");
}
}
stream = fdopen(from_fd[0], "rb");
if (stream == NULL)
statusline(ALERT, _("Failed to open pipe: %s"), strerror(errno));
else
read_file(stream, 0, "pipe", TRUE);
if (should_pipe && !ISSET(MULTIBUFFER))
add_undo(COUPLE_END);
if (wait(NULL) == -1)
nperror("wait");
/* If it was changed, restore the handler for SIGINT. */
if (!setup_failed && sigaction(SIGINT, &oldaction, NULL) == -1)
nperror("sigaction");
/* Restore the terminal to its desired state, and disable
* interpretation of the special control keys again. */
terminal_init();
return TRUE;
}
/* Discard undo items that are newer than the given one, or all if NULL.
* When keep is TRUE, do not touch the last_saved pointer. */
void discard_until(const undo *thisitem, openfilestruct *thefile, bool keep)
{
undo *dropit = thefile->undotop;
undo_group *group;
while (dropit != NULL && dropit != thisitem) {
thefile->undotop = dropit->next;
free(dropit->strdata);
free_filestruct(dropit->cutbuffer);
group = dropit->grouping;
while (group != NULL) {
undo_group *next = group->next;
free_chararray(group->indentations,
group->bottom_line - group->top_line);
free(group);
group = next;
}
free(dropit);
dropit = thefile->undotop;
}
/* Adjust the pointer to the top of the undo stack. */
thefile->current_undo = (undo *)thisitem;
/* Prevent a chain of editing actions from continuing. */
thefile->last_action = OTHER;
/* When requested, record that the undo stack was chopped, and
* that thus there is no point at which the file was last saved. */
if (!keep)
thefile->last_saved = (undo *)0xbeeb;
}
/* Add a new undo struct of the given type to the top of the current pile. */
void add_undo(undo_type action)
{
undo *u = openfile->current_undo;
/* The thing we did previously. */
/* When doing contiguous adds or contiguous cuts -- which means: with
* no cursor movement in between -- don't add a new undo item. */
if (u && u->mark_begin_lineno == openfile->current->lineno && action == openfile->last_action &&
((action == ADD && u->type == ADD && u->mark_begin_x == openfile->current_x) ||
(action == CUT && u->type == CUT && u->xflags < MARK_WAS_SET && keeping_cutbuffer())))
return;
/* Blow away newer undo items if we add somewhere in the middle. */
discard_until(u, openfile, TRUE);
#ifdef DEBUG
fprintf(stderr, " >> Adding an undo... action = %d\n", action);
#endif
/* Allocate and initialize a new undo item. */
u = (undo *) nmalloc(sizeof(undo));
u->type = action;
u->strdata = NULL;
u->cutbuffer = NULL;
u->cutbottom = NULL;
u->lineno = openfile->current->lineno;
u->begin = openfile->current_x;
u->mark_begin_lineno = openfile->current->lineno;
u->mark_begin_x = openfile->current_x;
u->wassize = openfile->totsize;
u->xflags = 0;
u->grouping = NULL;
#ifdef ENABLE_WRAPPING
/* If some action caused automatic long-line wrapping, insert the
* SPLIT_BEGIN item underneath that action's undo item. Otherwise,
* just add the new item to the top of the undo stack. */
if (u->type == SPLIT_BEGIN) {
u->next = openfile->undotop->next;
openfile->undotop->next = u;
} else
#endif
{
u->next = openfile->undotop;
openfile->undotop = u;
openfile->current_undo = u;
}
/* Record the info needed to be able to undo each possible action. */
switch (u->type) {
case ADD:
/* If a new magic line will be added, an undo should remove it. */
if (openfile->current == openfile->filebot)
u->xflags = WAS_FINAL_LINE;
u->wassize--;
break;
case ENTER:
break;
case BACK:
/* If the next line is the magic line, don't ever undo this
* backspace, as it won't actually have deleted anything. */
if (openfile->current->next == openfile->filebot &&
openfile->current->data[0] != '\0')
u->xflags = WAS_FINAL_BACKSPACE;
case DEL:
/* When not at the end of a line, store the deleted character,
* else purposely fall into the line-joining code. */
if (openfile->current->data[openfile->current_x] != '\0') {
char *char_buf = charalloc(MAXCHARLEN + 1);
int char_len = parse_mbchar(&openfile->current->data[u->begin],
char_buf, NULL);
char_buf[char_len] = '\0';
u->strdata = char_buf;
if (u->type == BACK)
u->mark_begin_x += char_len;
break;
}
case JOIN:
if (openfile->current->next) {
if (u->type == BACK) {
u->lineno = openfile->current->next->lineno;
u->begin = 0;
}
u->strdata = mallocstrcpy(NULL, openfile->current->next->data);
}
action = u->type = JOIN;
break;
case REPLACE:
u->strdata = mallocstrcpy(NULL, openfile->current->data);
break;
#ifdef ENABLE_WRAPPING
case SPLIT_BEGIN:
action = openfile->undotop->type;
break;
case SPLIT_END:
break;
#endif
case CUT_TO_EOF:
cutbuffer_reset();
break;
case CUT:
cutbuffer_reset();
if (openfile->mark) {
u->mark_begin_lineno = openfile->mark->lineno;
u->mark_begin_x = openfile->mark_x;
u->xflags = MARK_WAS_SET;
} else if (!ISSET(CUT_FROM_CURSOR)) {
/* The entire line is being cut regardless of the cursor position. */
u->begin = 0;
u->xflags = WAS_WHOLE_LINE;
}
break;
case PASTE:
u->cutbuffer = copy_filestruct(cutbuffer);
u->lineno += cutbottom->lineno - cutbuffer->lineno;
break;
case INSERT:
case COUPLE_BEGIN:
case COUPLE_END:
break;
case INDENT:
case UNINDENT:
break;
#ifdef ENABLE_COMMENT
case COMMENT:
case UNCOMMENT:
break;
#endif
default:
statusline(ALERT, "Wrong undo adding type -- please report a bug");
break;
}
openfile->last_action = action;
}
/* Update a multiline undo item. This should be called once for each line
* affected by a multiple-line-altering feature. The indentation that is
* added or removed is saved separately for each line in the undo item. */
void update_multiline_undo(ssize_t lineno, char *indentation)
{
undo *u = openfile->current_undo;
/* If there already is a group and the current line is contiguous with it,
* extend the group; otherwise, create a new group. */
if (u->grouping && u->grouping->bottom_line + 1 == lineno) {
size_t number_of_lines;
u->grouping->bottom_line++;
number_of_lines = u->grouping->bottom_line - u->grouping->top_line + 1;
u->grouping->indentations = (char **)nrealloc(u->grouping->indentations,
number_of_lines * sizeof(char *));
u->grouping->indentations[number_of_lines - 1] = mallocstrcpy(NULL,
indentation);
} else {
undo_group *born = (undo_group *)nmalloc(sizeof(undo_group));
born->next = u->grouping;
u->grouping = born;
born->top_line = lineno;
born->bottom_line = lineno;
u->grouping->indentations = (char **)nmalloc(sizeof(char *));
u->grouping->indentations[0] = mallocstrcpy(NULL, indentation);
}
/* Store the file size after the change, to be used when redoing. */
u->newsize = openfile->totsize;
}
/* Update an undo record, after checking that a new one is not needed. */
void update_undo(undo_type action)
{
undo *u = openfile->undotop;
char *char_buf;
int char_len;
#ifdef DEBUG
fprintf(stderr, " >> Updating an undo... action = %d\n", action);
#endif
/* If the action is different or the position changed, don't update the
* current record but add a new one instead. */
if (action != openfile->last_action ||
(action != ENTER && action != CUT && action != INSERT &&
openfile->current->lineno != openfile->current_undo->lineno)) {
add_undo(action);
return;
}
u->newsize = openfile->totsize;
switch (u->type) {
case ADD:
char_buf = charalloc(MAXCHARLEN);
char_len = parse_mbchar(&openfile->current->data[u->mark_begin_x],
char_buf, NULL);
u->strdata = addstrings(u->strdata, u->strdata ? strlen(u->strdata) : 0,
char_buf, char_len);
u->mark_begin_lineno = openfile->current->lineno;
u->mark_begin_x = openfile->current_x;
break;
case ENTER:
u->strdata = mallocstrcpy(NULL, openfile->current->data);
u->mark_begin_x = openfile->current_x;
break;
case BACK:
case DEL:
char_buf = charalloc(MAXCHARLEN);
char_len = parse_mbchar(&openfile->current->data[openfile->current_x],
char_buf, NULL);
if (openfile->current_x == u->begin) {
/* They deleted more: add removed character after earlier stuff. */
u->strdata = addstrings(u->strdata, strlen(u->strdata), char_buf, char_len);
u->mark_begin_x = openfile->current_x;
} else if (openfile->current_x == u->begin - char_len) {
/* They backspaced further: add removed character before earlier. */
u->strdata = addstrings(char_buf, char_len, u->strdata, strlen(u->strdata));
u->begin = openfile->current_x;
} else {
/* They deleted *elsewhere* on the line: start a new undo item. */
free(char_buf);
add_undo(u->type);
return;
}
break;
case JOIN:
break;
case REPLACE:
case PASTE:
u->begin = openfile->current_x;
u->lineno = openfile->current->lineno;
break;
#ifdef ENABLE_WRAPPING
case SPLIT_BEGIN:
case SPLIT_END:
break;
#endif
case CUT_TO_EOF:
case CUT:
if (!cutbuffer)
break;
free_filestruct(u->cutbuffer);
u->cutbuffer = copy_filestruct(cutbuffer);
if (u->xflags == MARK_WAS_SET) {
/* If the "marking" operation was from right-->left or
* bottom-->top, then swap the mark points. */
if ((u->lineno == u->mark_begin_lineno && u->begin < u->mark_begin_x)
|| u->lineno < u->mark_begin_lineno) {
ssize_t line = u->lineno;
size_t x_loc = u->begin;
u->begin = u->mark_begin_x;
u->mark_begin_x = x_loc;
u->lineno = u->mark_begin_lineno;
u->mark_begin_lineno = line;
} else
u->xflags = WAS_MARKED_FORWARD;
} else {
/* Compute the end of the cut for the undo, using our copy. */
u->cutbottom = u->cutbuffer;
while (u->cutbottom->next != NULL)
u->cutbottom = u->cutbottom->next;
u->lineno = u->mark_begin_lineno + u->cutbottom->lineno -
u->cutbuffer->lineno;
if (ISSET(CUT_FROM_CURSOR) || u->type == CUT_TO_EOF) {
u->begin = strlen(u->cutbottom->data);
if (u->lineno == u->mark_begin_lineno)
u->begin += u->mark_begin_x;
} else if (openfile->current == openfile->filebot &&
ISSET(NO_NEWLINES))
u->begin = strlen(u->cutbottom->data);
}
break;
case INSERT:
u->mark_begin_lineno = openfile->current->lineno;
u->mark_begin_x = openfile->current_x;
case COUPLE_BEGIN:
case COUPLE_END:
break;
default:
statusline(ALERT, "Wrong undo update type -- please report a bug");
break;
}
}
#endif /* !NANO_TINY */
#ifdef ENABLE_WRAPPING
/* Unset the prepend_wrap flag. We need to do this as soon as we do
* something other than type text. */
void wrap_reset(void)
{
prepend_wrap = FALSE;
}
/* Try wrapping the given line. Return TRUE if wrapped, FALSE otherwise. */
bool do_wrap(filestruct *line)
{
size_t line_len = strlen(line->data);
/* The length of the line we wrap. */
ssize_t wrap_loc;
/* The index of line->data where we wrap. */
const char *remainder;
/* The text after the wrap point. */
size_t rest_length;
/* The length of the remainder. */
size_t old_x = openfile->current_x;
filestruct *old_line = openfile->current;
/* There are three steps. First, we decide where to wrap. Then, we
* create the new wrap line. Finally, we clean up. */
/* Step 1, finding where to wrap. We are going to add a new line
* after a blank character. In this step, we call break_line() to
* get the location of the last blank we can break the line at, and
* set wrap_loc to the location of the character after it, so that
* the blank is preserved at the end of the line.
*
* If there is no legal wrap point, or we reach the last character
* of the line while trying to find one, we should return without
* wrapping. Note that if autoindent is turned on, we don't break
* at the end of it! */
/* Find the last blank where we can break the line. */
wrap_loc = break_line(line->data, fill, FALSE);
/* If we couldn't break the line, or we've reached the end of it, we
* don't wrap. */
if (wrap_loc == -1 || line->data[wrap_loc] == '\0')
return FALSE;
/* Otherwise, move forward to the character just after the blank. */
wrap_loc += move_mbright(line->data + wrap_loc, 0);
/* If we've reached the end of the line, we don't wrap. */
if (line->data[wrap_loc] == '\0')
return FALSE;
#ifndef NANO_TINY
/* If autoindent is turned on, and we're on the character just after
* the indentation, we don't wrap. */
if (ISSET(AUTOINDENT) && wrap_loc == indent_length(line->data))
return FALSE;
add_undo(SPLIT_BEGIN);
#endif
openfile->current = line;
/* Step 2, making the new wrap line. It will consist of indentation
* followed by the text after the wrap point, optionally followed by
* a space (if the text after the wrap point doesn't end in a blank)
* and the text of the next line, if they can fit without wrapping,
* the next line exists, and the prepend_wrap flag is set. */
/* The remainder is the text that will be wrapped to the next line. */
remainder = line->data + wrap_loc;
rest_length = line_len - wrap_loc;
/* We prepend the wrapped text to the next line, if the prepend_wrap
* flag is set, there is a next line, and prepending would not make
* the line too long. */
if (prepend_wrap && line != openfile->filebot) {
const char *tail = remainder + move_mbleft(remainder, rest_length);
/* Go to the end of the line. */
openfile->current_x = line_len;
/* If the remainder doesn't end in a blank, add a space. */
if (!is_blank_mbchar(tail)) {
#ifndef NANO_TINY
add_undo(ADD);
#endif
line->data = charealloc(line->data, line_len + 2);
line->data[line_len] = ' ';
line->data[line_len + 1] = '\0';
remainder = line->data + wrap_loc;
rest_length++;
openfile->totsize++;
openfile->current_x++;
#ifndef NANO_TINY
update_undo(ADD);
#endif
}
if (rest_length + strlen(line->next->data) <= fill) {
/* Delete the LF to join the two lines. */
do_delete();
/* Delete any leading blanks from the joined-on line. */
while (is_blank_mbchar(&line->data[openfile->current_x]))
do_delete();
}
}
/* Go to the wrap location. */
openfile->current_x = wrap_loc;
/* When requested, snip trailing blanks off the wrapped line. */
if (ISSET(TRIM_BLANKS)) {
size_t tail_x = move_mbleft(line->data, wrap_loc);
size_t typed_x = move_mbleft(line->data, old_x);
while (tail_x != typed_x && is_blank_mbchar(line->data + tail_x)) {
openfile->current_x = tail_x;
do_delete();
tail_x = move_mbleft(line->data, tail_x);
}
}
/* Now split the line. */
do_enter();
if (old_x < wrap_loc) {
openfile->current_x = old_x;
openfile->current = old_line;
prepend_wrap = TRUE;
} else {
openfile->current_x += (old_x - wrap_loc);
prepend_wrap = FALSE;
}
openfile->placewewant = xplustabs();
#ifndef NANO_TINY
add_undo(SPLIT_END);
#endif
return TRUE;
}
#endif /* ENABLE_WRAPPING */
#if defined(ENABLE_HELP) || defined(ENABLED_WRAPORJUSTIFY)
/* We are trying to break a chunk off line. We find the last blank such
* that the display length to there is at most (goal + 1). If there is
* no such blank, then we find the first blank. We then take the last
* blank in that group of blanks. The terminating '\0' counts as a
* blank, as does a '\n' if snap_at_nl is TRUE. */
ssize_t break_line(const char *line, ssize_t goal, bool snap_at_nl)
{
ssize_t lastblank = -1;
/* The index of the last blank we found. */
ssize_t index = 0;
/* The index of the character we are looking at. */
size_t column = 0;
/* The column position that corresponds with index. */
int char_len = 0;
/* The length of the current character, in bytes. */
/* Find the last blank that does not overshoot the target column. */
while (*line != '\0' && ((ssize_t)column <= goal)) {
if (is_blank_mbchar(line) || (snap_at_nl && *line == '\n')) {
lastblank = index;
if (*line == '\n')
break;
}
char_len = parse_mbchar(line, NULL, &column);
line += char_len;
index += char_len;
}
/* If the whole line displays shorter than goal, we're done. */
if ((ssize_t)column <= goal)
return index;
#ifdef ENABLE_HELP
/* If we're wrapping a help text and no blank was found, or was
* found only as the first character, force a line break. */
if (snap_at_nl && lastblank < 1)
return (index - char_len);
#endif
/* If no blank was found within the goal width, seek one after it. */
if (lastblank < 0) {
while (*line != '\0') {
if (is_blank_mbchar(line))
lastblank = index;
else if (lastblank > 0)
return lastblank;
char_len = parse_mbchar(line, NULL, NULL);
line += char_len;
index += char_len;
}
return -1;
}
/* Move the pointer back to the last blank, and then step beyond it. */
line = line - index + lastblank;
char_len = parse_mbchar(line, NULL, NULL);
line += char_len;
/* Skip any consecutive blanks after the last blank. */
while (*line != '\0' && is_blank_mbchar(line)) {
lastblank += char_len;
char_len = parse_mbchar(line, NULL, NULL);
line += char_len;
}
return lastblank;
}
#endif /* ENABLE_HELP || ENABLED_WRAPORJUSTIFY */
#if !defined(NANO_TINY) || defined(ENABLE_JUSTIFY)
/* The "indentation" of a line is the whitespace between the quote part
* and the non-whitespace of the line. */
size_t indent_length(const char *line)
{
size_t len = 0;
char onechar[MAXCHARLEN];
int charlen;
while (*line != '\0') {
charlen = parse_mbchar(line, onechar, NULL);
if (!is_blank_mbchar(onechar))
break;
line += charlen;
len += charlen;
}
return len;
}
#endif /* !NANO_TINY || ENABLE_JUSTIFY */
#ifdef ENABLE_JUSTIFY
/* justify_format() replaces blanks with spaces and multiple spaces by 1
* (except it maintains up to 2 after a character in punct optionally
* followed by a character in brackets, and removes all from the end).
*
* justify_format() might make paragraph->data shorter, and change the
* actual pointer with null_at().
*
* justify_format() will not look at the first skip characters of
* paragraph. skip should be at most strlen(paragraph->data). The
* character at paragraph[skip + 1] must not be blank. */
void justify_format(filestruct *paragraph, size_t skip)
{
char *end, *new_end, *new_paragraph_data;
size_t shift = 0;
#ifndef NANO_TINY
size_t mark_shift = 0;
#endif
end = paragraph->data + skip;
new_paragraph_data = charalloc(strlen(paragraph->data) + 1);
strncpy(new_paragraph_data, paragraph->data, skip);
new_end = new_paragraph_data + skip;
while (*end != '\0') {
int end_len;
/* If this character is blank, change it to a space if
* necessary, and skip over all blanks after it. */
if (is_blank_mbchar(end)) {
end_len = parse_mbchar(end, NULL, NULL);
*new_end = ' ';
new_end++;
end += end_len;
while (*end != '\0' && is_blank_mbchar(end)) {
end_len = parse_mbchar(end, NULL, NULL);
end += end_len;
shift += end_len;
#ifndef NANO_TINY
/* Keep track of the change in the current line. */
if (openfile->mark == paragraph &&
openfile->mark_x >= end - paragraph->data)
mark_shift += end_len;
#endif
}
/* If this character is punctuation optionally followed by a
* bracket and then followed by blanks, change no more than two
* of the blanks to spaces if necessary, and skip over all
* blanks after them. */
} else if (mbstrchr(punct, end) != NULL) {
end_len = parse_mbchar(end, NULL, NULL);
while (end_len > 0) {
*new_end = *end;
new_end++;
end++;
end_len--;
}
if (*end != '\0' && mbstrchr(brackets, end) != NULL) {
end_len = parse_mbchar(end, NULL, NULL);
while (end_len > 0) {
*new_end = *end;
new_end++;
end++;
end_len--;
}
}
if (*end != '\0' && is_blank_mbchar(end)) {
end_len = parse_mbchar(end, NULL, NULL);
*new_end = ' ';
new_end++;
end += end_len;
}
if (*end != '\0' && is_blank_mbchar(end)) {
end_len = parse_mbchar(end, NULL, NULL);
*new_end = ' ';
new_end++;
end += end_len;
}
while (*end != '\0' && is_blank_mbchar(end)) {
end_len = parse_mbchar(end, NULL, NULL);
end += end_len;
shift += end_len;
#ifndef NANO_TINY
/* Keep track of the change in the current line. */
if (openfile->mark == paragraph &&
openfile->mark_x >= end - paragraph->data)
mark_shift += end_len;
#endif
}
/* If this character is neither blank nor punctuation, leave it
* unchanged. */
} else {
end_len = parse_mbchar(end, NULL, NULL);
while (end_len > 0) {
*new_end = *end;
new_end++;
end++;
end_len--;
}
}
}
*new_end = *end;
/* If there are spaces at the end of the line, remove them. */
while (new_end > new_paragraph_data + skip && *(new_end - 1) == ' ') {
new_end--;
shift++;
}
if (shift > 0) {
openfile->totsize -= shift;
null_at(&new_paragraph_data, new_end - new_paragraph_data);
free(paragraph->data);
paragraph->data = new_paragraph_data;
#ifndef NANO_TINY
/* Adjust the mark coordinates to compensate for the change in
* the current line. */
if (openfile->mark == paragraph) {
openfile->mark_x -= mark_shift;
if (openfile->mark_x > new_end - new_paragraph_data)
openfile->mark_x = new_end - new_paragraph_data;
}
#endif
} else
free(new_paragraph_data);
}
/* The "quote part" of a line is the largest initial substring matching
* the quote string. This function returns the length of the quote part
* of the given line. */
size_t quote_length(const char *line)
{
regmatch_t matches;
int rc = regexec("ereg, line, 1, &matches, 0);
if (rc == REG_NOMATCH || matches.rm_so == (regoff_t)-1)
return 0;
/* matches.rm_so should be 0, since the quote string should start
* with the caret ^. */
return matches.rm_eo;
}
/* The maximum depth of recursion. This must be an even number. */
#define RECURSION_LIMIT 222
/* Return TRUE when the given line is the beginning of a paragraph (BOP). */
bool begpar(const filestruct *const line, int depth)
{
size_t quote_len, indent_len, prev_dent_len;
/* If this is the very first line of the buffer, it counts as a BOP
* even when it contains no text. */
if (line == openfile->fileage)
return TRUE;
/* If recursion is going too deep, just say it's not a BOP. */
if (depth > RECURSION_LIMIT)
return FALSE;
quote_len = quote_length(line->data);
indent_len = indent_length(line->data + quote_len);
/* If this line contains no text, it is not a BOP. */
if (line->data[quote_len + indent_len] == '\0')
return FALSE;
/* If the quote part of the preceding line differs, this is a BOP. */
if (quote_len != quote_length(line->prev->data) ||
strncmp(line->data, line->prev->data, quote_len) != 0)
return TRUE;
prev_dent_len = indent_length(line->prev->data + quote_len);
/* If the preceding line contains no text, this is a BOP. */
if (line->prev->data[quote_len + prev_dent_len] == '\0')
return TRUE;
/* If the indentation of the preceding line equals the indentation
* of this line, this is not a BOP. */
if (prev_dent_len == indent_len && strncmp(line->prev->data + quote_len,
line->data + quote_len, indent_len) == 0)
return FALSE;
/* Otherwise, this is a BOP if the preceding line is not. */
return !begpar(line->prev, depth + 1);
}
/* Return TRUE when the given line is part of a paragraph. */
bool inpar(const filestruct *const line)
{
size_t quote_len = quote_length(line->data);
return (line->data[quote_len +
indent_length(line->data + quote_len)] != '\0');
}
/* Move the next par_len lines, starting with first_line, into the
* justify buffer, leaving copies of those lines in place. Assume that
* par_len is greater than zero, and that there are enough lines after
* first_line. */
void backup_lines(filestruct *first_line, size_t par_len)
{
filestruct *top = first_line;
/* The top of the paragraph we're backing up. */
filestruct *bot = first_line;
/* The bottom of the paragraph we're backing up. */
size_t i;
size_t current_x_save = openfile->current_x;
ssize_t fl_lineno_save = first_line->lineno;
ssize_t edittop_lineno_save = openfile->edittop->lineno;
ssize_t current_lineno_save = openfile->current->lineno;
#ifndef NANO_TINY
bool mark_is_set = (openfile->mark != NULL);
ssize_t was_mark_lineno = (mark_is_set ? openfile->mark->lineno : 0);
size_t was_mark_x = openfile->mark_x;
#endif
/* Move bot down par_len lines to the line after the last line of
* the paragraph, if there is one. */
for (i = par_len; i > 0 && bot != openfile->filebot; i--)
bot = bot->next;
/* Move the paragraph from the current buffer to the justify buffer. */
extract_buffer(&jusbuffer, &jusbottom, top, 0, bot,
(i == 1 && bot == openfile->filebot) ? strlen(bot->data) : 0);
/* Copy the paragraph back to the current buffer. */
copy_from_buffer(jusbuffer);
/* Move upward from the last line of the paragraph to the first
* line, putting first_line, edittop, current, and mark_begin at the
* same lines in the copied paragraph that they had in the original
* paragraph. */
if (openfile->current != openfile->fileage) {
top = openfile->current->prev;
#ifndef NANO_TINY
if (mark_is_set && openfile->current->lineno == was_mark_lineno) {
openfile->mark = openfile->current;
openfile->mark_x = was_mark_x;
}
#endif
} else
top = openfile->current;
for (i = par_len; i > 0 && top != NULL; i--) {
if (top->lineno == fl_lineno_save)
first_line = top;
if (top->lineno == edittop_lineno_save)
openfile->edittop = top;
if (top->lineno == current_lineno_save)
openfile->current = top;
#ifndef NANO_TINY
if (mark_is_set && top->lineno == was_mark_lineno) {
openfile->mark = top;
openfile->mark_x = was_mark_x;
}
#endif
top = top->prev;
}
/* Put current_x at the same place in the copied paragraph that it
* had in the original paragraph. */
openfile->current_x = current_x_save;
set_modified();
}
/* Find the beginning of the current paragraph if we're in one, or the
* beginning of the next paragraph if we're not. Afterwards, save the
* quote length and paragraph length in *quote and *par. Return TRUE if
* we found a paragraph, and FALSE if there was an error or we didn't
* find a paragraph. */
bool find_paragraph(size_t *const quote, size_t *const par)
{
size_t quote_len;
/* Length of the initial quotation of the paragraph we search for. */
size_t par_len;
/* Number of lines in the paragraph we search for. */
filestruct *current_save;
/* The line at the beginning of the paragraph we search for. */
if (quoterc != 0) {
statusline(ALERT, _("Bad quote string %s: %s"), quotestr, quoteerr);
return FALSE;
}
/* If we're at the end of the last line of the file, it means that
* there aren't any paragraphs left, so get out. */
if (openfile->current == openfile->filebot && openfile->current_x ==
strlen(openfile->filebot->data))
return FALSE;
/* If the current line isn't in a paragraph, move forward to the
* last line of the next paragraph, if any. */
if (!inpar(openfile->current)) {
do_para_end(FALSE);
/* If we end up past the beginning of the line, it means that
* we're at the end of the last line of the file, and the line
* isn't blank, in which case the last line of the file is the
* last line of the next paragraph.
*
* Otherwise, if we end up on a line that's in a paragraph, it
* means that we're on the line after the last line of the next
* paragraph, in which case we should move back to the last line
* of the next paragraph. */
if (openfile->current_x == 0) {
if (!openfile->current->prev || !inpar(openfile->current->prev))
return FALSE;
if (openfile->current != openfile->fileage)
openfile->current = openfile->current->prev;
}
}
/* If the current line isn't the first line of the paragraph, move
* back to the first line of the paragraph. */
if (!begpar(openfile->current, 0))
do_para_begin(FALSE);
/* Now current is the first line of the paragraph. Set quote_len to
* the quotation length of that line, and set par_len to the number
* of lines in this paragraph. */
quote_len = quote_length(openfile->current->data);
current_save = openfile->current;
do_para_end(FALSE);
par_len = openfile->current->lineno - current_save->lineno;
/* If we end up past the beginning of the line, it means that we're at
* the end of the last line of the file, and the line isn't blank, in
* which case the last line of the file is part of the paragraph. */
if (openfile->current_x > 0)
par_len++;
openfile->current = current_save;
/* Save the values of quote_len and par_len. */
*quote = quote_len;
*par = par_len;
return TRUE;
}
/* Justify the current paragraph, and justify the entire file when
* full_justify is TRUE. */
void do_justify(bool full_justify)
{
filestruct *first_par_line = NULL;
/* Will be the first line of the justified paragraph(s), if any.
* For restoring after unjustify. */
filestruct *last_par_line = NULL;
/* Will be the line after the last line of the justified
* paragraph(s), if any. Also for restoring after unjustify. */
bool filebot_inpar = FALSE;
/* Whether the text at filebot is part of the current paragraph. */
int kbinput;
/* The first keystroke after a justification. */
functionptrtype func;
/* The function associated with that keystroke. */
/* We save these variables to be restored if the user unjustifies. */
filestruct *edittop_save = openfile->edittop;
size_t firstcolumn_save = openfile->firstcolumn;
filestruct *current_save = openfile->current;
size_t current_x_save = openfile->current_x;
#ifndef NANO_TINY
filestruct *was_mark = openfile->mark;
size_t was_mark_x = openfile->mark_x;
#endif
bool modified_save = openfile->modified;
/* Move to the beginning of the current line, so that justifying at
* the end of the last line of the file, if that line isn't blank,
* will work the first time through. */
openfile->current_x = 0;
/* If we're justifying the entire file, start at the beginning. */
if (full_justify)
openfile->current = openfile->fileage;
while (TRUE) {
filestruct *firstline;
/* The first line of the current paragraph. */
filestruct *sampleline;
/* The line from which the indentation is copied -- either
* the first and only or the second line of the paragraph. */
size_t quote_len;
/* Length of the quote part of the current paragraph. */
size_t lead_len;
/* Length of the quote part plus the indentation part. */
size_t par_len;
/* Number of lines in the current paragraph. */
ssize_t break_pos;
/* Where we will break lines. */
char *lead_string;
/* The quote+indent stuff that is copied from the sample line. */
/* Find the first line of the paragraph to be justified. That
* is the start of this paragraph if we're in one, or the start
* of the next otherwise. Save the quote length and paragraph
* length (number of lines). Don't refresh the screen yet,
* since we'll do that after we justify.
*
* If the search failed, we do one of two things. If we're
* justifying the whole file, and we've found at least one
* paragraph, it means that we should justify all the way to the
* last line of the file, so set the last line of the text to be
* justified to the last line of the file and break out of the
* loop. Otherwise, it means that there are no paragraph(s) to
* justify, so refresh the screen and get out. */
if (!find_paragraph("e_len, &par_len)) {
if (full_justify && first_par_line != NULL) {
last_par_line = openfile->filebot;
break;
} else {
refresh_needed = TRUE;
return;
}
}
/* par_len will be one greater than the number of lines between
* current and filebot if filebot is the last line in the
* paragraph. Set filebot_inpar to TRUE if this is the case. */
filebot_inpar = (openfile->current->lineno + par_len ==
openfile->filebot->lineno + 1);
/* If we haven't already done it, move the original paragraph(s)
* to the justify buffer, splice a copy of the original
* paragraph(s) into the file in the same place, and set
* first_par_line to the first line of the copy. */
if (first_par_line == NULL) {
backup_lines(openfile->current, full_justify ?
openfile->filebot->lineno - openfile->current->lineno +
((openfile->filebot->data[0] != '\0') ? 1 : 0) : par_len);
first_par_line = openfile->current;
}
/* Remember the first line of the current paragraph. */
firstline = openfile->current;
/* The sample line is either the only line or the second line. */
sampleline = (par_len == 1 ? firstline : firstline->next);
/* Copy the leading part (quoting + indentation) of the sample line. */
lead_len = quote_len + indent_length(sampleline->data + quote_len);
lead_string = mallocstrncpy(NULL, sampleline->data, lead_len + 1);
lead_string[lead_len] = '\0';
/* Now tack all the lines of the paragraph together, skipping
* the quoting and indentation on all lines after the first. */
while (par_len > 1) {
filestruct *next_line = openfile->current->next;
size_t line_len = strlen(openfile->current->data);
size_t next_line_len = strlen(next_line->data);
lead_len = quote_len + indent_length(next_line->data + quote_len);
/* We're just about to tack the next line onto this one. If
* this line isn't empty, make sure it ends in a space. */
if (line_len > 0 && openfile->current->data[line_len - 1] != ' ') {
openfile->current->data =
charealloc(openfile->current->data, line_len + 2);
openfile->current->data[line_len++] = ' ';
openfile->current->data[line_len] = '\0';
openfile->totsize++;
}
openfile->current->data = charealloc(openfile->current->data,
line_len + next_line_len - lead_len + 1);
strcat(openfile->current->data, next_line->data + lead_len);
#ifndef NANO_TINY
/* If needed, adjust the coordinates of the mark. */
if (openfile->mark == next_line) {
openfile->mark = openfile->current;
openfile->mark_x += line_len - lead_len;
}
#endif
/* Don't destroy edittop! */
if (next_line == openfile->edittop)
openfile->edittop = openfile->current;
unlink_node(next_line);
openfile->totsize -= lead_len + 1;
par_len--;
}
/* Call justify_format() on the paragraph, which will remove excess
* spaces from it and change all blank characters to spaces. */
justify_format(openfile->current, quote_len +
indent_length(openfile->current->data + quote_len));
while (par_len > 0 && strlenpt(openfile->current->data) > fill) {
size_t line_len = strlen(openfile->current->data);
/* If this line is too long, try to wrap it to the next line
* to make it short enough. */
break_pos = break_line(openfile->current->data + lead_len,
fill - strnlenpt(openfile->current->data, lead_len), FALSE);
/* If we can't break the line, or don't need to, we're done. */
if (break_pos == -1 || break_pos + lead_len == line_len)
break;
/* Adjust the breaking position for the leading part and
* move it beyond the found whitespace character. */
break_pos += lead_len + 1;
/* Insert a new line after the current one and allocate it. */
splice_node(openfile->current, make_new_node(openfile->current));
openfile->current->next->data = charalloc(lead_len + 1 +
line_len - break_pos);
/* Copy the leading part and the text after the breaking point
* into the next line. */
strncpy(openfile->current->next->data, lead_string, lead_len);
strcpy(openfile->current->next->data + lead_len,
openfile->current->data + break_pos);
openfile->totsize += lead_len + 1;
par_len++;
#ifndef NANO_TINY
/* If needed, compensate the mark coordinates for the change
* in the current line. */
if (openfile->mark == openfile->current &&
openfile->mark_x > break_pos) {
openfile->mark = openfile->current->next;
openfile->mark_x -= break_pos - lead_len;
}
#endif
/* When requested, snip all trailing blanks. */
if (ISSET(TRIM_BLANKS)) {
while (break_pos > 0 &&
is_blank_mbchar(&openfile->current->data[break_pos - 1])) {
break_pos--;
openfile->totsize--;
}
}
/* Break the current line. */
null_at(&openfile->current->data, break_pos);
/* Go to the next line. */
openfile->current = openfile->current->next;
par_len--;
}
free(lead_string);
/* Go to the next line, if possible. If there is no next line,
* move to the end of the current line. */
if (openfile->current != openfile->filebot)
openfile->current = openfile->current->next;
else
openfile->current_x = strlen(openfile->current->data);
/* Renumber the now-justified paragraph, since both refreshing the
* edit window and finding a paragraph need correct line numbers. */
renumber(firstline);
/* We've just finished justifying the paragraph. If we're not
* justifying the entire file, break out of the loop.
* Otherwise, continue the loop so that we justify all the
* paragraphs in the file. */
if (!full_justify)
break;
}
/* We are now done justifying the paragraph or the file, so clean
* up. totsize has been maintained above. If we actually justified
* something, set last_par_line to the new end of the paragraph. */
if (first_par_line != NULL)
last_par_line = openfile->current;
#ifndef NANO_TINY
/* Let a justification cancel a soft mark. */
if (openfile->mark && openfile->kind_of_mark == SOFTMARK)
openfile->mark = NULL;
#endif
edit_refresh();
/* Show "Unjustify" in the help lines. */
uncutfunc->desc = unjust_tag;
display_main_list();
#ifndef NANO_TINY
kbinput = KEY_WINCH;
/* Now wait for the next keystroke. */
while (kbinput == KEY_WINCH)
#endif
{
statusbar(_("Can now UnJustify!"));
place_the_cursor();
kbinput = do_input(FALSE);
}
/* Unset the suppression flag after showing the Unjustify message. */
suppress_cursorpos = FALSE;
func = func_from_key(&kbinput);
/* If the keystroke was Unjustify or Undo, then undo the justification. */
if (func == do_uncut_text
#ifndef NANO_TINY
|| func == do_undo
#endif
) {
/* If we actually justified something, then splice the preserved
* unjustified text back into the file, */
if (first_par_line != NULL) {
filestruct *trash = NULL, *dummy = NULL;
/* Throw away the justified paragraph, and replace it with
* the preserved unjustified text. */
extract_buffer(&trash, &dummy, first_par_line, 0, last_par_line,
filebot_inpar ? strlen(last_par_line->data) : 0);
free_filestruct(trash);
ingraft_buffer(jusbuffer);
/* Restore the old position and the mark. */
openfile->edittop = edittop_save;
openfile->firstcolumn = firstcolumn_save;
openfile->current = current_save;
openfile->current_x = current_x_save;
#ifndef NANO_TINY
if (openfile->mark) {
openfile->mark = was_mark;
openfile->mark_x = was_mark_x;
}
#endif
openfile->modified = modified_save;
if (!openfile->modified)
titlebar(NULL);
refresh_needed = TRUE;
}
} else {
/* Put the keystroke back into the queue. */
unget_kbinput(kbinput, meta_key);
/* Set the desired screen column (always zero, except at EOF). */
openfile->placewewant = xplustabs();
#ifndef NANO_TINY
/* Throw away the entire undo stack, to prevent a crash when
* the user tries to undo something in the justified text. */
discard_until(NULL, openfile, FALSE);
#endif
/* Blow away the unjustified text. */
free_filestruct(jusbuffer);
}
/* Mark the buffer for unjustified text as empty. */
jusbuffer = NULL;
wipe_statusbar();
/* Show "Uncut" again in the help lines, and force their redrawing. */
uncutfunc->desc = uncut_tag;
currmenu = MMOST;
}
/* Justify the current paragraph. */
void do_justify_void(void)
{
do_justify(FALSE);
}
/* Justify the entire file. */
void do_full_justify(void)
{
do_justify(TRUE);
}
#endif /* ENABLE_JUSTIFY */
#if defined(ENABLE_SPELLER) || defined (ENABLE_COLOR)
/* Set up an argument list for executing the given command. */
void construct_argument_list(char ***arguments, char *command, char *filename)
{
char *copy_of_command = mallocstrcpy(NULL, command);
char *element = strtok(copy_of_command, " ");
int count = 2;
while (element != NULL) {
*arguments = (char **)nrealloc(*arguments, ++count * sizeof(char *));
(*arguments)[count - 3] = element;
element = strtok(NULL, " ");
}
(*arguments)[count - 2] = filename;
(*arguments)[count - 1] = NULL;
}
#endif
#ifdef ENABLE_SPELLER
/* Let the user edit the misspelled word. Return FALSE if the user cancels. */
bool fix_spello(const char *word)
{
char *save_search;
size_t firstcolumn_save = openfile->firstcolumn;
size_t current_x_save = openfile->current_x;
filestruct *edittop_save = openfile->edittop;
filestruct *current_save = openfile->current;
/* Save where we are. */
bool proceed = FALSE;
/* The return value of this function. */
bool result;
/* The return value of searching for a misspelled word. */
#ifndef NANO_TINY
bool right_side_up = FALSE;
/* TRUE if (mark_begin, mark_begin_x) is the top of the mark,
* FALSE if (current, current_x) is. */
filestruct *top, *bot;
size_t top_x, bot_x;
#endif
/* Save the current search string, then set it to the misspelled word. */
save_search = last_search;
last_search = mallocstrcpy(NULL, word);
#ifndef NANO_TINY
/* If the mark is on, start at the beginning of the marked region. */
if (openfile->mark) {
mark_order((const filestruct **)&top, &top_x,
(const filestruct **)&bot, &bot_x, &right_side_up);
/* If the region is marked normally, swap the end points, so that
* (current, current_x) (where searching starts) is at the top. */
if (right_side_up) {
openfile->current = top;
openfile->current_x = top_x;
openfile->mark = bot;
openfile->mark_x = bot_x;
}
} else
#endif
/* Otherwise, start from the top of the file. */
{
openfile->current = openfile->fileage;
openfile->current_x = 0;
}
/* Find the first whole occurrence of word. */
result = findnextstr(word, TRUE, INREGION, NULL, FALSE, NULL, 0);
/* If the word isn't found, alert the user; if it is, allow correction. */
if (result == 0) {
statusline(ALERT, _("Unfindable word: %s"), word);
lastmessage = HUSH;
proceed = TRUE;
napms(2800);
} else if (result == 1) {
size_t from_col = xplustabs();
size_t to_col = from_col + strlenpt(word);
#ifndef NANO_TINY
filestruct *saved_mark = openfile->mark;
openfile->mark = NULL;
#endif
edit_refresh();
#ifndef NANO_TINY
openfile->mark = saved_mark;
#endif
spotlight(TRUE, from_col, to_col);
/* Let the user supply a correctly spelled alternative. */
proceed = (do_prompt(FALSE, FALSE, MSPELL, word, NULL,
edit_refresh, _("Edit a replacement")) != -1);
spotlight(FALSE, from_col, to_col);
/* If a replacement was given, go through all occurrences. */
if (proceed && strcmp(word, answer) != 0) {
do_replace_loop(word, TRUE, current_save, ¤t_x_save);
/* TRANSLATORS: Shown after fixing misspellings in one word. */
statusbar(_("Next word..."));
napms(400);
}
}
#ifndef NANO_TINY
if (openfile->mark) {
/* Restore the (compensated) end points of the marked region. */
if (right_side_up) {
openfile->current = openfile->mark;
openfile->current_x = openfile->mark_x;
openfile->mark = top;
openfile->mark_x = top_x;
} else {
openfile->current = top;
openfile->current_x = top_x;
}
} else
#endif
{
/* Restore the (compensated) cursor position. */
openfile->current = current_save;
openfile->current_x = current_x_save;
}
/* Restore the string that was last searched for. */
free(last_search);
last_search = save_search;
/* Restore the viewport to where it was. */
openfile->edittop = edittop_save;
openfile->firstcolumn = firstcolumn_save;
return proceed;
}
/* Internal (integrated) spell checking using the spell program,
* filtered through the sort and uniq programs. Return NULL for normal
* termination, and the error string otherwise. */
const char *do_int_speller(const char *tempfile_name)
{
char *read_buff, *read_buff_ptr, *read_buff_word;
size_t pipe_buff_size, read_buff_size, read_buff_read, bytesread;
int spell_fd[2], sort_fd[2], uniq_fd[2], tempfile_fd = -1;
pid_t pid_spell, pid_sort, pid_uniq;
int spell_status, sort_status, uniq_status;
/* Create all three pipes up front. */
if (pipe(spell_fd) == -1 || pipe(sort_fd) == -1 || pipe(uniq_fd) == -1)
return _("Could not create pipe");
statusbar(_("Creating misspelled word list, please wait..."));
/* A new process to run spell in. */
if ((pid_spell = fork()) == 0) {
/* Child continues (i.e. future spell process). */
close(spell_fd[0]);
/* Replace the standard input with the temp file. */
if ((tempfile_fd = open(tempfile_name, O_RDONLY)) == -1)
goto close_pipes_and_exit;
if (dup2(tempfile_fd, STDIN_FILENO) != STDIN_FILENO)
goto close_pipes_and_exit;
close(tempfile_fd);
/* Send spell's standard output to the pipe. */
if (dup2(spell_fd[1], STDOUT_FILENO) != STDOUT_FILENO)
goto close_pipes_and_exit;
close(spell_fd[1]);
/* Start the spell program; we are using $PATH. */
execlp("spell", "spell", NULL);
/* This should not be reached if spell is found. */
exit(1);
}
/* Parent continues here. */
close(spell_fd[1]);
/* A new process to run sort in. */
if ((pid_sort = fork()) == 0) {
/* Child continues (i.e. future sort process). Replace the
* standard input with the standard output of the old pipe. */
if (dup2(spell_fd[0], STDIN_FILENO) != STDIN_FILENO)
goto close_pipes_and_exit;
close(spell_fd[0]);
/* Send sort's standard output to the new pipe. */
if (dup2(sort_fd[1], STDOUT_FILENO) != STDOUT_FILENO)
goto close_pipes_and_exit;
close(sort_fd[1]);
/* Start the sort program. Use -f to ignore case. */
execlp("sort", "sort", "-f", NULL);
/* This should not be reached if sort is found. */
exit(1);
}
close(spell_fd[0]);
close(sort_fd[1]);
/* A new process to run uniq in. */
if ((pid_uniq = fork()) == 0) {
/* Child continues (i.e. future uniq process). Replace the
* standard input with the standard output of the old pipe. */
if (dup2(sort_fd[0], STDIN_FILENO) != STDIN_FILENO)
goto close_pipes_and_exit;
close(sort_fd[0]);
/* Send uniq's standard output to the new pipe. */
if (dup2(uniq_fd[1], STDOUT_FILENO) != STDOUT_FILENO)
goto close_pipes_and_exit;
close(uniq_fd[1]);
/* Start the uniq program; we are using PATH. */
execlp("uniq", "uniq", NULL);
/* This should not be reached if uniq is found. */
exit(1);
}
close(sort_fd[0]);
close(uniq_fd[1]);
/* The child process was not forked successfully. */
if (pid_spell < 0 || pid_sort < 0 || pid_uniq < 0) {
close(uniq_fd[0]);
return _("Could not fork");
}
/* Get the system pipe buffer size. */
if ((pipe_buff_size = fpathconf(uniq_fd[0], _PC_PIPE_BUF)) < 1) {
close(uniq_fd[0]);
return _("Could not get size of pipe buffer");
}
/* Read in the returned spelling errors. */
read_buff_read = 0;
read_buff_size = pipe_buff_size + 1;
read_buff = read_buff_ptr = charalloc(read_buff_size);
while ((bytesread = read(uniq_fd[0], read_buff_ptr, pipe_buff_size)) > 0) {
read_buff_read += bytesread;
read_buff_size += pipe_buff_size;
read_buff = read_buff_ptr = charealloc(read_buff, read_buff_size);
read_buff_ptr += read_buff_read;
}
*read_buff_ptr = '\0';
close(uniq_fd[0]);
/* Do any replacements case sensitive, forward, and without regexes. */
SET(CASE_SENSITIVE);
UNSET(BACKWARDS_SEARCH);
UNSET(USE_REGEXP);
read_buff_word = read_buff_ptr = read_buff;
/* Process each of the misspelled words. */
while (*read_buff_ptr != '\0') {
if ((*read_buff_ptr == '\r') || (*read_buff_ptr == '\n')) {
*read_buff_ptr = '\0';
if (read_buff_word != read_buff_ptr) {
if (!fix_spello(read_buff_word)) {
read_buff_word = read_buff_ptr;
break;
}
}
read_buff_word = read_buff_ptr + 1;
}
read_buff_ptr++;
}
/* Special case: the last word doesn't end with '\r' or '\n'. */
if (read_buff_word != read_buff_ptr)
fix_spello(read_buff_word);
free(read_buff);
tidy_up_after_search();
refresh_needed = TRUE;
/* Process the end of the three processes. */
waitpid(pid_spell, &spell_status, 0);
waitpid(pid_sort, &sort_status, 0);
waitpid(pid_uniq, &uniq_status, 0);
if (WIFEXITED(spell_status) == 0 || WEXITSTATUS(spell_status))
return _("Error invoking \"spell\"");
if (WIFEXITED(sort_status) == 0 || WEXITSTATUS(sort_status))
return _("Error invoking \"sort -f\"");
if (WIFEXITED(uniq_status) == 0 || WEXITSTATUS(uniq_status))
return _("Error invoking \"uniq\"");
/* When all went okay. */
return NULL;
close_pipes_and_exit:
/* Don't leak any handles. */
close(tempfile_fd);
close(spell_fd[0]);
close(spell_fd[1]);
close(sort_fd[0]);
close(sort_fd[1]);
close(uniq_fd[0]);
close(uniq_fd[1]);
exit(1);
}
/* External (alternate) spell checking. Return NULL for normal
* termination, and the error string otherwise. */
const char *do_alt_speller(char *tempfile_name)
{
int alt_spell_status;
size_t current_x_save = openfile->current_x;
size_t pww_save = openfile->placewewant;
ssize_t lineno_save = openfile->current->lineno;
bool was_at_eol = (openfile->current->data[openfile->current_x] == '\0');
struct stat spellfileinfo;
time_t timestamp;
pid_t pid_spell;
static char **spellargs = NULL;
/* Get the timestamp and the size of the temporary file. */
stat(tempfile_name, &spellfileinfo);
timestamp = spellfileinfo.st_mtime;
/* If the number of bytes to check is zero, get out. */
if (spellfileinfo.st_size == 0)
return NULL;
/* Exit from curses mode. */
endwin();
construct_argument_list(&spellargs, alt_speller, tempfile_name);
/* Fork a child process and run the alternate spell program in it. */
if ((pid_spell = fork()) == 0) {
execvp(spellargs[0], spellargs);
/* Terminate the child process if no alternate speller is found. */
exit(1);
} else if (pid_spell < 0)
return _("Could not fork");
#ifndef NANO_TINY
/* Block SIGWINCHes so the spell checker doesn't get any. */
allow_sigwinch(FALSE);
#endif
/* Wait for the alternate spell checker to finish. */
wait(&alt_spell_status);
/* Reenter curses mode. */
doupdate();
/* Restore the terminal to its previous state. */
terminal_init();
if (!WIFEXITED(alt_spell_status) || WEXITSTATUS(alt_spell_status) != 0)
return invocation_error(alt_speller);
#ifndef NANO_TINY
/* Replace the marked text (or the entire text) of the current buffer
* with the spell-checked text. */
if (openfile->mark) {
filestruct *top, *bot;
size_t top_x, bot_x;
bool right_side_up;
ssize_t was_mark_lineno = openfile->mark->lineno;
mark_order((const filestruct **)&top, &top_x,
(const filestruct **)&bot, &bot_x, &right_side_up);
openfile->mark = NULL;
replace_marked_buffer(tempfile_name, top, top_x, bot, bot_x);
/* Adjust the end point of the marked region for any change in
* length of the region's last line. */
if (right_side_up)
current_x_save = openfile->current_x;
else
openfile->mark_x = openfile->current_x;
/* Restore the mark. */
openfile->mark = fsfromline(was_mark_lineno);
} else
#endif
replace_buffer(tempfile_name);
/* Go back to the old position. */
goto_line_posx(lineno_save, current_x_save);
if (was_at_eol || openfile->current_x > strlen(openfile->current->data))
openfile->current_x = strlen(openfile->current->data);
openfile->placewewant = pww_save;
adjust_viewport(STATIONARY);
/* Stat the temporary file again, and mark the buffer as modified only
* if this file was changed since it was written. */
stat(tempfile_name, &spellfileinfo);
if (spellfileinfo.st_mtime != timestamp) {
set_modified();
#ifndef NANO_TINY
/* Flush the undo stack, to avoid making a mess when the user
* tries to undo things in spell-corrected lines. */
discard_until(NULL, openfile, FALSE);
#endif
}
#ifndef NANO_TINY
/* Unblock SIGWINCHes again. */
allow_sigwinch(TRUE);
#endif
return NULL;
}
/* Spell check the current file. If an alternate spell checker is
* specified, use it. Otherwise, use the internal spell checker. */
void do_spell(void)
{
bool status;
FILE *temp_file;
char *temp;
unsigned stash[sizeof(flags) / sizeof(flags[0])];
/* A storage place for the current flag settings. */
const char *spell_msg;
if (ISSET(RESTRICTED)) {
show_restricted_warning();
return;
}
temp = safe_tempfile(&temp_file);
if (temp == NULL) {
statusline(ALERT, _("Error writing temp file: %s"), strerror(errno));
return;
}
/* Save the settings of the global flags. */
memcpy(stash, flags, sizeof(flags));
/* Don't add an extra newline when writing out the (selected) text. */
SET(NO_NEWLINES);
#ifndef NANO_TINY
if (openfile->mark)
status = write_marked_file(temp, temp_file, TRUE, OVERWRITE);
else
#endif
status = write_file(temp, temp_file, TRUE, OVERWRITE, TRUE);
if (!status) {
statusline(ALERT, _("Error writing temp file: %s"), strerror(errno));
free(temp);
return;
}
blank_bottombars();
statusbar(_("Invoking spell checker, please wait"));
spell_msg = (alt_speller != NULL) ? do_alt_speller(temp) :
do_int_speller(temp);
unlink(temp);
free(temp);
/* Restore the settings of the global flags. */
memcpy(flags, stash, sizeof(flags));
/* If the spell-checker printed any error messages onscreen, make
* sure that they're cleared off. */
total_refresh();
if (spell_msg != NULL) {
if (errno == 0)
/* Don't display an error message of "Success". */
statusline(ALERT, _("Spell checking failed: %s"), spell_msg);
else
statusline(ALERT, _("Spell checking failed: %s: %s"), spell_msg,
strerror(errno));
} else
statusbar(_("Finished checking spelling"));
}
#endif /* ENABLE_SPELLER */
#ifdef ENABLE_COLOR
/* Run a linting program on the current buffer. Return NULL for normal
* termination, and the error string otherwise. */
void do_linter(void)
{
char *read_buff, *read_buff_ptr, *read_buff_word;
size_t pipe_buff_size, read_buff_size, read_buff_read, bytesread;
size_t parsesuccess = 0;
int lint_status, lint_fd[2];
pid_t pid_lint;
static char **lintargs = NULL;
lintstruct *lints = NULL, *tmplint = NULL, *curlint = NULL;
if (ISSET(RESTRICTED)) {
show_restricted_warning();
return;
}
if (!openfile->syntax || !openfile->syntax->linter) {
statusbar(_("No linter defined for this type of file!"));
return;
}
#ifndef NANO_TINY
openfile->mark = NULL;
#endif
edit_refresh();
if (openfile->modified) {
int i = do_yesno_prompt(FALSE, _("Save modified buffer before linting?"));
if (i == -1) {
statusbar(_("Cancelled"));
return;
} else if (i == 1 && (do_writeout(FALSE, FALSE) != 1))
return;
}
/* Create a pipe up front. */
if (pipe(lint_fd) == -1) {
statusbar(_("Could not create pipe"));
return;
}
blank_bottombars();
currmenu = MLINTER;
statusbar(_("Invoking linter, please wait"));
construct_argument_list(&lintargs, openfile->syntax->linter, openfile->filename);
/* Start a new process to run the linter in. */
if ((pid_lint = fork()) == 0) {
/* Child continues here (i.e. the future linting process). */
close(lint_fd[0]);
/* Send the linter's standard output + err to the pipe. */
if (dup2(lint_fd[1], STDOUT_FILENO) != STDOUT_FILENO)
exit(9);
if (dup2(lint_fd[1], STDERR_FILENO) != STDERR_FILENO)
exit(9);
close(lint_fd[1]);
/* Start the linter program; we are using $PATH. */
execvp(lintargs[0], lintargs);
/* This is only reached when the linter is not found. */
exit(9);
}
/* Parent continues here. */
close(lint_fd[1]);
/* If the child process was not forked successfully... */
if (pid_lint < 0) {
close(lint_fd[0]);
statusbar(_("Could not fork"));
return;
}
/* Get the system pipe buffer size. */
if ((pipe_buff_size = fpathconf(lint_fd[0], _PC_PIPE_BUF)) < 1) {
close(lint_fd[0]);
statusbar(_("Could not get size of pipe buffer"));
return;
}
/* Read in the returned syntax errors. */
read_buff_read = 0;
read_buff_size = pipe_buff_size + 1;
read_buff = read_buff_ptr = charalloc(read_buff_size);
while ((bytesread = read(lint_fd[0], read_buff_ptr, pipe_buff_size)) > 0) {
read_buff_read += bytesread;
read_buff_size += pipe_buff_size;
read_buff = read_buff_ptr = charealloc(read_buff, read_buff_size);
read_buff_ptr += read_buff_read;
}
*read_buff_ptr = '\0';
close(lint_fd[0]);
/* Process the linter output. */
read_buff_word = read_buff_ptr = read_buff;
while (*read_buff_ptr != '\0') {
if ((*read_buff_ptr == '\r') || (*read_buff_ptr == '\n')) {
*read_buff_ptr = '\0';
if (read_buff_word != read_buff_ptr) {
char *filename = NULL, *linestr = NULL, *maybecol = NULL;
char *message = mallocstrcpy(NULL, read_buff_word);
/* At the moment we handle the following formats:
*
* filenameorcategory:line:column:message (e.g. splint)
* filenameorcategory:line,column:message (e.g. pylint)
* filenameorcategory:line:message (e.g. pyflakes) */
if (strstr(message, ": ") != NULL) {
filename = strtok(read_buff_word, ":");
if ((linestr = strtok(NULL, ":")) != NULL) {
if ((maybecol = strtok(NULL, ":")) != NULL) {
ssize_t tmplineno = 0, tmpcolno = 0;
char *tmplinecol;
tmplineno = strtol(linestr, NULL, 10);
if (tmplineno <= 0) {
read_buff_ptr++;
free(message);
continue;
}
tmpcolno = strtol(maybecol, NULL, 10);
/* Check if the middle field is in comma format. */
if (tmpcolno <= 0) {
strtok(linestr, ",");
if ((tmplinecol = strtok(NULL, ",")) != NULL)
tmpcolno = strtol(tmplinecol, NULL, 10);
else
tmpcolno = 1;
}
/* Nice. We have a lint message we can use. */
parsesuccess++;
tmplint = curlint;
curlint = nmalloc(sizeof(lintstruct));
curlint->next = NULL;
curlint->prev = tmplint;
if (curlint->prev != NULL)
curlint->prev->next = curlint;
curlint->msg = mallocstrcpy(NULL, message);
curlint->lineno = tmplineno;
curlint->colno = tmpcolno;
curlint->filename = mallocstrcpy(NULL, filename);
if (lints == NULL)
lints = curlint;
}
}
} else
free(message);
}
read_buff_word = read_buff_ptr + 1;
}
read_buff_ptr++;
}
/* Process the end of the linting process. */
waitpid(pid_lint, &lint_status, 0);
if (!WIFEXITED(lint_status) || WEXITSTATUS(lint_status) > 2) {
statusbar(invocation_error(openfile->syntax->linter));
return;
}
free(read_buff);
if (parsesuccess == 0) {
statusline(HUSH, _("Got 0 parsable lines from command: %s"),
openfile->syntax->linter);
return;
}
bottombars(MLINTER);
tmplint = NULL;
curlint = lints;
while (TRUE) {
int kbinput;
functionptrtype func;
struct stat lintfileinfo;
if (stat(curlint->filename, &lintfileinfo) != -1 &&
(openfile->current_stat == NULL ||
openfile->current_stat->st_ino != lintfileinfo.st_ino)) {
#ifdef ENABLE_MULTIBUFFER
const openfilestruct *started_at = openfile;
openfile = openfile->next;
while (openfile != started_at && (openfile->current_stat == NULL ||
openfile->current_stat->st_ino != lintfileinfo.st_ino))
openfile = openfile->next;
if (openfile->current_stat == NULL ||
openfile->current_stat->st_ino != lintfileinfo.st_ino) {
char *msg = charalloc(1024 + strlen(curlint->filename));
int i;
sprintf(msg, _("This message is for unopened file %s,"
" open it in a new buffer?"), curlint->filename);
i = do_yesno_prompt(FALSE, msg);
free(msg);
if (i == -1) {
statusbar(_("Cancelled"));
goto free_lints_and_return;
} else if (i == 1) {
open_buffer(curlint->filename, TRUE);
} else {
#endif
char *dontwantfile = mallocstrcpy(NULL, curlint->filename);
lintstruct *restlint = NULL;
while (curlint != NULL) {
if (strcmp(curlint->filename, dontwantfile) == 0) {
if (curlint == lints)
lints = curlint->next;
else
curlint->prev->next = curlint->next;
if (curlint->next != NULL)
curlint->next->prev = curlint->prev;
tmplint = curlint;
curlint = curlint->next;
free(tmplint->msg);
free(tmplint->filename);
free(tmplint);
} else {
if (restlint == NULL)
restlint = curlint;
curlint = curlint->next;
}
}
if (restlint == NULL) {
statusbar(_("No more errors in unopened files, cancelling"));
napms(2400);
break;
} else {
curlint = restlint;
continue;
}
free(dontwantfile);
#ifdef ENABLE_MULTIBUFFER
}
}
#endif
}
if (tmplint != curlint) {
goto_line_posx(curlint->lineno, curlint->colno - 1);
titlebar(NULL);
adjust_viewport(CENTERING);
#ifdef ENABLE_LINENUMBERS
confirm_margin();
#endif
edit_refresh();
statusbar(curlint->msg);
bottombars(MLINTER);
}
/* Place the cursor to indicate the affected line. */
place_the_cursor();
wnoutrefresh(edit);
kbinput = get_kbinput(bottomwin, VISIBLE);
#ifndef NANO_TINY
if (kbinput == KEY_WINCH)
continue;
#endif
func = func_from_key(&kbinput);
tmplint = curlint;
if (func == do_cancel)
break;
else if (func == do_help_void) {
tmplint = NULL;
do_help_void();
} else if (func == do_page_down) {
if (curlint->next != NULL)
curlint = curlint->next;
else
statusbar(_("At last message"));
} else if (func == do_page_up) {
if (curlint->prev != NULL)
curlint = curlint->prev;
else
statusbar(_("At first message"));
}
}
wipe_statusbar();
#ifdef ENABLE_MULTIBUFFER
free_lints_and_return:
#endif
for (curlint = lints; curlint != NULL;) {
tmplint = curlint;
curlint = curlint->next;
free(tmplint->msg);
free(tmplint->filename);
free(tmplint);
}
}
#ifdef ENABLE_SPELLER
/* Run a formatter for the current syntax. This expects the formatter
* to be non-interactive and operate on a file in-place, which we'll
* pass it on the command line. */
void do_formatter(void)
{
bool status;
FILE *temp_file;
int format_status;
ssize_t lineno_save = openfile->current->lineno;
size_t current_x_save = openfile->current_x;
size_t pww_save = openfile->placewewant;
bool was_at_eol = (openfile->current->data[openfile->current_x] == '\0');
pid_t pid_format;
static char **formatargs = NULL;
char *temp, *finalstatus = NULL;
if (openfile->totsize == 0) {
statusbar(_("Finished"));
return;
}
temp = safe_tempfile(&temp_file);
if (temp == NULL) {
statusline(ALERT, _("Error writing temp file: %s"), strerror(errno));
return;
}
#ifndef NANO_TINY
/* We're not supporting partial formatting, oi vey. */
openfile->mark = NULL;
#endif
status = write_file(temp, temp_file, TRUE, OVERWRITE, TRUE);
if (!status) {
statusline(ALERT, _("Error writing temp file: %s"), strerror(errno));
free(temp);
return;
}
blank_bottombars();
statusbar(_("Invoking formatter, please wait"));
construct_argument_list(&formatargs, openfile->syntax->formatter, temp);
/* Start a new process for the formatter. */
if ((pid_format = fork()) == 0) {
/* Start the formatting program; we are using $PATH. */
execvp(formatargs[0], formatargs);
/* Should not be reached, if the formatter is found! */
exit(1);
}
/* If we couldn't fork, get out. */
if (pid_format < 0) {
statusbar(_("Could not fork"));
unlink(temp);
free(temp);
return;
}
#ifndef NANO_TINY
/* Block SIGWINCHes so the formatter doesn't get any. */
allow_sigwinch(FALSE);
#endif
/* Wait for the formatter to finish. */
wait(&format_status);
if (!WIFEXITED(format_status) || WEXITSTATUS(format_status) != 0)
finalstatus = invocation_error(openfile->syntax->formatter);
else {
/* Replace the text of the current buffer with the formatted text. */
replace_buffer(temp);
/* Restore the cursor position. */
goto_line_posx(lineno_save, current_x_save);
if (was_at_eol || openfile->current_x > strlen(openfile->current->data))
openfile->current_x = strlen(openfile->current->data);
openfile->placewewant = pww_save;
adjust_viewport(STATIONARY);
set_modified();
#ifndef NANO_TINY
/* Flush the undo stack, to avoid a mess or crash when
* the user tries to undo things in reformatted lines. */
discard_until(NULL, openfile, FALSE);
#endif
finalstatus = _("Finished formatting");
}
unlink(temp);
free(temp);
#ifndef NANO_TINY
/* Unblock SIGWINCHes again. */
allow_sigwinch(TRUE);
#endif
statusbar(finalstatus);
/* If there were error messages, allow the user some time to read them. */
if (WIFEXITED(format_status) && WEXITSTATUS(format_status) == 2)
sleep(4);
/* If there were any messages, clear them off. */
total_refresh();
}
#endif /* ENABLE_SPELLER */
#endif /* ENABLE_COLOR */
#ifndef NANO_TINY
/* Our own version of "wc". Note that its character counts are in
* multibyte characters instead of single-byte characters. */
void do_wordlinechar_count(void)
{
size_t words = 0, chars = 0;
ssize_t nlines = 0;
size_t current_x_save = openfile->current_x;
size_t pww_save = openfile->placewewant;
filestruct *current_save = openfile->current;
filestruct *was_mark = openfile->mark;
filestruct *top, *bot;
size_t top_x, bot_x;
/* If the mark is on, partition the buffer so that it
* contains only the marked text, and turn the mark off. */
if (was_mark) {
mark_order((const filestruct **)&top, &top_x,
(const filestruct **)&bot, &bot_x, NULL);
filepart = partition_filestruct(top, top_x, bot, bot_x);
openfile->mark = NULL;
}
/* Start at the top of the file. */
openfile->current = openfile->fileage;
openfile->current_x = 0;
openfile->placewewant = 0;
/* Keep moving to the next word (counting punctuation characters as
* part of a word, as "wc -w" does), without updating the screen,
* until we reach the end of the file, incrementing the total word
* count whenever we're on a word just before moving. */
while (openfile->current != openfile->filebot ||
openfile->current->data[openfile->current_x] != '\0') {
if (do_next_word(FALSE, TRUE, FALSE))
words++;
}
/* Get the total line and character counts, as "wc -l" and "wc -c"
* do, but get the latter in multibyte characters. */
if (was_mark) {
nlines = openfile->filebot->lineno - openfile->fileage->lineno + 1;
chars = get_totsize(openfile->fileage, openfile->filebot);
/* Unpartition the buffer so that it contains all the text
* again, and turn the mark back on. */
unpartition_filestruct(&filepart);
openfile->mark = was_mark;
} else {
nlines = openfile->filebot->lineno;
chars = openfile->totsize;
}
/* Restore where we were. */
openfile->current = current_save;
openfile->current_x = current_x_save;
openfile->placewewant = pww_save;
/* Display the total word, line, and character counts on the statusbar. */
statusline(HUSH, _("%sWords: %zu Lines: %zd Chars: %zu"), was_mark ?
_("In Selection: ") : "", words, nlines, chars);
}
#endif /* !NANO_TINY */
/* Get verbatim input. */
void do_verbatim_input(void)
{
int *kbinput;
size_t kbinput_len, i;
char *output;
/* TRANSLATORS: This is displayed when the next keystroke will be
* inserted verbatim. */
statusbar(_("Verbatim Input"));
place_the_cursor();
/* Read in all the verbatim characters. */
kbinput = get_verbatim_kbinput(edit, &kbinput_len);
/* Unsuppress cursor-position display or blank the statusbar. */
if (ISSET(CONSTANT_SHOW))
suppress_cursorpos = FALSE;
else
wipe_statusbar();
/* Display all the verbatim characters at once, not filtering out
* control characters. */
output = charalloc(kbinput_len + 1);
for (i = 0; i < kbinput_len; i++)
output[i] = (char)kbinput[i];
output[i] = '\0';
free(kbinput);
do_output(output, kbinput_len, TRUE);
free(output);
}
#ifdef ENABLE_WORDCOMPLETION
/* Copy the found completion candidate. */
char *copy_completion(char *check_line, int start)
{
char *word;
int position = start, len_of_word = 0, index = 0;
/* Find the length of the word by travelling to its end. */
while (is_word_mbchar(&check_line[position], FALSE)) {
int next = move_mbright(check_line, position);
len_of_word += next - position;
position = next;
}
word = charalloc(len_of_word + 1);
/* Simply copy the word. */
while (index < len_of_word)
word[index++] = check_line[start++];
word[index] = '\0';
return word;
}
/* Look at the fragment the user has typed, then search the current buffer for
* the first word that starts with this fragment, and tentatively complete the
* fragment. If the user types 'Complete' again, search and paste the next
* possible completion. */
void complete_a_word(void)
{
char *shard, *completion = NULL;
size_t start_of_shard, shard_length = 0;
size_t i = 0, j = 0;
completion_word *some_word;
#ifdef ENABLE_WRAPPING
bool was_set_wrapping = !ISSET(NO_WRAP);
#endif
/* If this is a fresh completion attempt... */
if (pletion_line == NULL) {
/* Clear the list of words of a previous completion run. */
while (list_of_completions != NULL) {
completion_word *dropit = list_of_completions;
list_of_completions = list_of_completions->next;
free(dropit->word);
free(dropit);
}
/* Prevent a completion from being merged with typed text. */
openfile->last_action = OTHER;
/* Initialize the starting point for searching. */
pletion_line = openfile->fileage;
pletion_x = 0;
/* Wipe the "No further matches" message. */
wipe_statusbar();
} else {
/* Remove the attempted completion from the buffer. */
do_undo();
}
/* Find the start of the fragment that the user typed. */
start_of_shard = openfile->current_x;
while (start_of_shard > 0) {
int step_left = move_mbleft(openfile->current->data, start_of_shard);
if (!is_word_mbchar(&openfile->current->data[step_left], FALSE))
break;
start_of_shard = step_left;
}
/* If there is no word fragment before the cursor, do nothing. */
if (start_of_shard == openfile->current_x) {
pletion_line = NULL;
return;
}
shard = charalloc(openfile->current_x - start_of_shard + 1);
/* Copy the fragment that has to be searched for. */
while (start_of_shard < openfile->current_x)
shard[shard_length++] = openfile->current->data[start_of_shard++];
shard[shard_length] = '\0';
/* Run through all of the lines in the buffer, looking for shard. */
while (pletion_line != NULL) {
int threshold = strlen(pletion_line->data) - shard_length - 1;
/* The point where we can stop searching for shard. */
/* Traverse the whole line, looking for shard. */
for (i = pletion_x; (int)i < threshold; i++) {
/* If the first byte doesn't match, run on. */
if (pletion_line->data[i] != shard[0])
continue;
/* Compare the rest of the bytes in shard. */
for (j = 1; j < shard_length; j++)
if (pletion_line->data[i + j] != shard[j])
break;
/* If not all of the bytes matched, continue searching. */
if (j < shard_length)
continue;
/* If the found match is not /longer/ than shard, skip it. */
if (!is_word_mbchar(&pletion_line->data[i + j], FALSE))
continue;
/* If the match is not a separate word, skip it. */
if (i > 0 && is_word_mbchar(&pletion_line->data[
move_mbleft(pletion_line->data, i)], FALSE))
continue;
/* If this match is the shard itself, ignore it. */
if (pletion_line == openfile->current &&
i == openfile->current_x - shard_length)
continue;
completion = copy_completion(pletion_line->data, i);
/* Look among earlier attempted completions for a duplicate. */
some_word = list_of_completions;
while (some_word && strcmp(some_word->word, completion) != 0)
some_word = some_word->next;
/* If we've already tried this word, skip it. */
if (some_word != NULL) {
free(completion);
continue;
}
/* Add the found word to the list of completions. */
some_word = (completion_word *)nmalloc(sizeof(completion_word));
some_word->word = completion;
some_word->next = list_of_completions;
list_of_completions = some_word;
#ifdef ENABLE_WRAPPING
/* Temporarily disable wrapping so only one undo item is added. */
SET(NO_WRAP);
#endif
/* Inject the completion into the buffer. */
do_output(&completion[shard_length],
strlen(completion) - shard_length, FALSE);
#ifdef ENABLE_WRAPPING
/* If needed, reenable wrapping and wrap the current line. */
if (was_set_wrapping) {
UNSET(NO_WRAP);
do_wrap(openfile->current);
}
#endif
/* Set the position for a possible next search attempt. */
pletion_x = ++i;
free(shard);
return;
}
pletion_line = pletion_line->next;
pletion_x = 0;
}
/* The search has reached the end of the file. */
if (list_of_completions != NULL) {
statusline(ALERT, _("No further matches"));
refresh_needed = TRUE;
} else
/* TRANSLATORS: Shown when there are zero possible completions. */
statusline(ALERT, _("No matches"));
free(shard);
}
#endif /* ENABLE_WORDCOMPLETION */