smol/src/text.c

3182 lines
90 KiB
C

/**************************************************************************
* text.c -- This file is part of GNU nano. *
* *
* Copyright (C) 1999-2011, 2013-2021 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) 2015-2021 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 "prototypes.h"
#include <errno.h>
#include <fcntl.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include <sys/wait.h>
#if defined(__APPLE__) && !defined(st_mtim)
#define st_mtim st_mtimespec
#endif
#ifdef ENABLE_WORDCOMPLETION
static int pletion_x = 0;
/* The x position in pletion_line of the last found completion. */
static completionstruct *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;
openfile->softmark = FALSE;
statusbar(_("Mark Set"));
} else {
openfile->mark = NULL;
statusbar(_("Mark Unset"));
refresh_needed = TRUE;
}
}
#endif
/* Insert a tab. Or, if --tabstospaces is in effect, insert the number
* of spaces that a tab would normally take up at this position. */
void do_tab(void)
{
#ifdef ENABLE_COLOR
if (openfile->syntax && openfile->syntax->tab)
inject(openfile->syntax->tab, strlen(openfile->syntax->tab));
else
#endif
#ifndef NANO_TINY
if (ISSET(TABS_TO_SPACES)) {
char *spaces = nmalloc(tabsize + 1);
size_t length = tabsize - (xplustabs() % tabsize);
memset(spaces, ' ', length);
spaces[length] = '\0';
inject(spaces, length);
free(spaces);
} else
#endif
inject((char *)"\t", 1);
}
#ifndef NANO_TINY
/* Add an indent to the given line. */
void indent_a_line(linestruct *line, char *indentation)
{
size_t length = strlen(line->data);
size_t indent_len = strlen(indentation);
/* If the requested indentation is empty, don't change the line. */
if (indent_len == 0)
return;
/* Add the fabricated indentation to the beginning of the line. */
line->data = nrealloc(line->data, length + indent_len + 1);
memmove(line->data + indent_len, line->data, length + 1);
memcpy(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;
linestruct *top, *bot, *line;
/* Use either all the marked lines or just the current line. */
get_range(&top, &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 = nmalloc(tabsize + 1);
#ifdef ENABLE_COLOR
if (openfile->syntax && openfile->syntax->tab)
indentation = mallocstrcpy(indentation, openfile->syntax->tab);
else
#endif
/* Set the indentation to either a bunch of spaces or a single tab. */
if (ISSET(TABS_TO_SPACES)) {
memset(indentation, ' ', tabsize);
indentation[tabsize] = '\0';
} else {
indentation[0] = '\t';
indentation[1] = '\0';
}
add_undo(INDENT, NULL);
/* 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();
ensure_firstcolumn_is_aligned();
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 white_count = 0;
#ifdef ENABLE_COLOR
if (openfile->syntax && openfile->syntax->tab) {
size_t thelength = strlen(openfile->syntax->tab);
while (text[white_count] == openfile->syntax->tab[white_count])
if (++white_count == thelength)
return thelength;
white_count = 0;
}
#endif
while (TRUE) {
if (*text == '\t')
return white_count + 1;
if (*text != ' ')
return white_count;
if (++white_count == tabsize)
return tabsize;
text++;
}
}
/* Adjust the positions of mark and cursor when they are on the given line. */
void compensate_leftward(linestruct *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(linestruct *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. */
memmove(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)
{
linestruct *top, *bot, *line;
/* Use either all the marked lines or just the current line. */
get_range(&top, &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, NULL);
/* 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 = measured_copy(line->data, indent_len);
unindent_a_line(line, indent_len);
update_multiline_undo(line->lineno, indentation);
free(indentation);
}
set_modified();
ensure_firstcolumn_is_aligned();
refresh_needed = TRUE;
shift_held = TRUE;
}
/* Perform an undo or redo for an indent or unindent action. */
void handle_indent_action(undostruct *u, bool undoing, bool add_indent)
{
groupstruct *group = u->grouping;
linestruct *line = line_from_number(group->top_line);
/* When redoing, reposition the cursor and let the indenter adjust it. */
if (!undoing)
goto_line_posx(u->head_lineno, u->head_x);
/* For each line in the group, add or remove the individual indent. */
while (line != NULL && 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->head_lineno, u->head_x);
refresh_needed = TRUE;
}
#endif /* !NANO_TINY */
#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, linestruct *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 = nrealloc(line->data, line_len + pre_len + post_len + 1);
memmove(line->data + pre_len, line->data, line_len + 1);
memmove(line->data, comment_seq, pre_len);
if (post_len > 0)
memmove(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. */
memmove(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;
linestruct *top, *bot, *line;
bool empty, all_empty = TRUE;
#ifdef ENABLE_COLOR
if (openfile->syntax)
comment_seq = openfile->syntax->comment;
if (*comment_seq == '\0') {
statusline(AHEM, _("Commenting is not supported for this file type"));
return;
}
#endif
/* Determine which lines to work on. */
get_range(&top, &bot);
/* If only the magic line is selected, don't do anything. */
if (top == bot && bot == openfile->filebot && !ISSET(NO_NEWLINES)) {
statusline(AHEM, _("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, NULL);
/* 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 = copy_of(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();
ensure_firstcolumn_is_aligned();
refresh_needed = TRUE;
shift_held = TRUE;
}
/* Perform an undo or redo for a comment or uncomment action. */
void handle_comment_action(undostruct *u, bool undoing, bool add_comment)
{
groupstruct *group = u->grouping;
/* When redoing, reposition the cursor and let the commenter adjust it. */
if (!undoing)
goto_line_posx(u->head_lineno, u->head_x);
while (group) {
linestruct *line = line_from_number(group->top_line);
while (line != NULL && line->lineno <= group->bottom_line) {
comment_line(undoing ^ add_comment ?
COMMENT : UNCOMMENT, line, u->strdata);
line = line->next;
}
group = group->next;
}
/* When undoing, reposition the cursor to the recorded location. */
if (undoing)
goto_line_posx(u->head_lineno, u->head_x);
refresh_needed = TRUE;
}
#endif /* ENABLE_COMMENT */
#ifndef NANO_TINY
#define redo_paste undo_cut
#define undo_paste redo_cut
/* Undo a cut, or redo a paste. */
void undo_cut(undostruct *u)
{
goto_line_posx(u->head_lineno, (u->xflags & WAS_WHOLE_LINE) ? 0 : u->head_x);
/* Clear an inherited anchor but not a user-placed one. */
if (!(u->xflags & HAD_ANCHOR_AT_START))
openfile->current->has_anchor = FALSE;
if (u->cutbuffer)
copy_from_buffer(u->cutbuffer);
/* If originally the last line was cut too, remove an extra magic line. */
if ((u->xflags & INCLUDED_LAST_LINE) && !ISSET(NO_NEWLINES) &&
openfile->filebot != openfile->current &&
openfile->filebot->prev->data[0] == '\0')
remove_magicline();
if (u->xflags & CURSOR_WAS_AT_HEAD)
goto_line_posx(u->head_lineno, u->head_x);
}
/* Redo a cut, or undo a paste. */
void redo_cut(undostruct *u)
{
linestruct *oldcutbuffer = cutbuffer;
cutbuffer = NULL;
openfile->mark = line_from_number(u->head_lineno);
openfile->mark_x = (u->xflags & WAS_WHOLE_LINE) ? 0 : u->head_x;
goto_line_posx(u->tail_lineno, u->tail_x);
do_snip(TRUE, FALSE, u->type == ZAP);
free_lines(cutbuffer);
cutbuffer = oldcutbuffer;
}
/* Undo the last thing(s) we did. */
void do_undo(void)
{
undostruct *u = openfile->current_undo;
linestruct *line = NULL, *intruder;
linestruct *oldcutbuffer;
char *data, *undidmsg = NULL;
size_t original_x, regain_from_x;
if (u == NULL) {
statusline(AHEM, _("Nothing to undo"));
return;
}
if (u->type <= REPLACE)
line = line_from_number(u->tail_lineno);
switch (u->type) {
case ADD:
/* TRANSLATORS: The next thirteen strings describe actions
* that are undone or redone. They are all nouns, not verbs. */
undidmsg = _("addition");
if ((u->xflags & INCLUDED_LAST_LINE) && !ISSET(NO_NEWLINES))
remove_magicline();
memmove(line->data + u->head_x, line->data + u->head_x + strlen(u->strdata),
strlen(line->data + u->head_x) - strlen(u->strdata) + 1);
goto_line_posx(u->head_lineno, u->head_x);
break;
case ENTER:
undidmsg = _("line break");
/* An <Enter> at the end of leading whitespace while autoindenting has
* deleted the whitespace, and stored an x position of zero. In that
* case, adjust the positions to return to and to scoop data from. */
original_x = (u->head_x == 0) ? u->tail_x : u->head_x;
regain_from_x = (u->head_x == 0) ? 0 : u->tail_x;
line->data = nrealloc(line->data, strlen(line->data) +
strlen(&u->strdata[regain_from_x]) + 1);
strcat(line->data, &u->strdata[regain_from_x]);
line->has_anchor |= line->next->has_anchor;
unlink_node(line->next);
renumber_from(line);
goto_line_posx(u->head_lineno, original_x);
break;
case BACK:
case DEL:
undidmsg = _("deletion");
data = nmalloc(strlen(line->data) + strlen(u->strdata) + 1);
strncpy(data, line->data, u->head_x);
strcpy(&data[u->head_x], u->strdata);
strcpy(&data[u->head_x + strlen(u->strdata)], &line->data[u->head_x]);
free(line->data);
line->data = data;
goto_line_posx(u->tail_lineno, u->tail_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_BACKSPACE_AT_EOF) && !ISSET(NO_NEWLINES)) {
goto_line_posx(openfile->filebot->lineno, 0);
break;
}
line->data[u->tail_x] = '\0';
intruder = make_new_node(line);
intruder->data = copy_of(u->strdata);
splice_node(line, intruder);
renumber_from(intruder);
goto_line_posx(u->head_lineno, u->head_x);
break;
case REPLACE:
undidmsg = _("replacement");
if ((u->xflags & INCLUDED_LAST_LINE) && !ISSET(NO_NEWLINES))
remove_magicline();
data = u->strdata;
u->strdata = line->data;
line->data = data;
goto_line_posx(u->head_lineno, u->head_x);
break;
#ifdef ENABLE_WRAPPING
case SPLIT_BEGIN:
undidmsg = _("addition");
break;
case SPLIT_END:
openfile->current_undo = openfile->current_undo->next;
while (openfile->current_undo->type != SPLIT_BEGIN)
do_undo();
u = openfile->current_undo;
break;
#endif
case ZAP:
undidmsg = _("erasure");
undo_cut(u);
break;
case CUT_TO_EOF:
case CUT:
/* TRANSLATORS: Remember: these are nouns, NOT verbs. */
undidmsg = _("cut");
undo_cut(u);
break;
case PASTE:
undidmsg = _("paste");
undo_paste(u);
if ((u->xflags & INCLUDED_LAST_LINE) && !ISSET(NO_NEWLINES) &&
openfile->filebot != openfile->current)
remove_magicline();
break;
case INSERT:
undidmsg = _("insertion");
oldcutbuffer = cutbuffer;
cutbuffer = NULL;
goto_line_posx(u->head_lineno, u->head_x);
openfile->mark = line_from_number(u->tail_lineno);
openfile->mark_x = u->tail_x;
cut_marked_region();
u->cutbuffer = cutbuffer;
cutbuffer = oldcutbuffer;
if ((u->xflags & INCLUDED_LAST_LINE) && !ISSET(NO_NEWLINES) &&
openfile->filebot != openfile->current)
remove_magicline();
break;
case COUPLE_BEGIN:
undidmsg = u->strdata;
goto_line_posx(u->head_lineno, u->head_x);
openfile->current_y = u->tail_lineno;
adjust_viewport(STATIONARY);
break;
case COUPLE_END:
/* Remember the row of the cursor for a possible redo. */
openfile->current_undo->head_lineno = openfile->current_y;
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:
break;
}
if (undidmsg && !pletion_line)
statusline(HUSH, _("Undid %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 buffer 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)
{
linestruct *line = NULL, *intruder;
char *data, *redidmsg = NULL;
bool suppress_modification = FALSE;
undostruct *u = openfile->undotop;
if (u == NULL || u == openfile->current_undo) {
statusline(AHEM, _("Nothing to redo"));
return;
}
/* Find the item before the current one in the undo stack. */
while (u->next != openfile->current_undo)
u = u->next;
if (u->type <= REPLACE)
line = line_from_number(u->tail_lineno);
switch (u->type) {
case ADD:
redidmsg = _("addition");
if ((u->xflags & INCLUDED_LAST_LINE) && !ISSET(NO_NEWLINES))
new_magicline();
data = nmalloc(strlen(line->data) + strlen(u->strdata) + 1);
strncpy(data, line->data, u->head_x);
strcpy(&data[u->head_x], u->strdata);
strcpy(&data[u->head_x + strlen(u->strdata)], &line->data[u->head_x]);
free(line->data);
line->data = data;
goto_line_posx(u->tail_lineno, u->tail_x);
break;
case ENTER:
redidmsg = _("line break");
line->data[u->head_x] = '\0';
intruder = make_new_node(line);
intruder->data = copy_of(u->strdata);
splice_node(line, intruder);
renumber_from(intruder);
goto_line_posx(u->head_lineno + 1, u->tail_x);
break;
case BACK:
case DEL:
redidmsg = _("deletion");
memmove(line->data + u->head_x, line->data + u->head_x + strlen(u->strdata),
strlen(line->data + u->head_x) - strlen(u->strdata) + 1);
goto_line_posx(u->head_lineno, u->head_x);
break;
case JOIN:
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_BACKSPACE_AT_EOF) && !ISSET(NO_NEWLINES)) {
goto_line_posx(u->tail_lineno, u->tail_x);
break;
}
line->data = nrealloc(line->data, strlen(line->data) + strlen(u->strdata) + 1);
strcat(line->data, u->strdata);
unlink_node(line->next);
renumber_from(line);
goto_line_posx(u->tail_lineno, u->tail_x);
break;
case REPLACE:
redidmsg = _("replacement");
if ((u->xflags & INCLUDED_LAST_LINE) && !ISSET(NO_NEWLINES))
new_magicline();
data = u->strdata;
u->strdata = line->data;
line->data = data;
goto_line_posx(u->head_lineno, u->head_x);
break;
#ifdef ENABLE_WRAPPING
case SPLIT_BEGIN:
openfile->current_undo = u;
while (openfile->current_undo->type != SPLIT_END)
do_redo();
u = openfile->current_undo;
goto_line_posx(u->head_lineno, u->head_x);
break;
case SPLIT_END:
redidmsg = _("addition");
break;
#endif
case ZAP:
redidmsg = _("erasure");
redo_cut(u);
break;
case CUT_TO_EOF:
case CUT:
redidmsg = _("cut");
redo_cut(u);
break;
case PASTE:
redidmsg = _("paste");
redo_paste(u);
break;
case INSERT:
redidmsg = _("insertion");
goto_line_posx(u->head_lineno, u->head_x);
if (u->cutbuffer)
copy_from_buffer(u->cutbuffer);
else
suppress_modification = TRUE;
free_lines(u->cutbuffer);
u->cutbuffer = NULL;
break;
case COUPLE_BEGIN:
openfile->current_undo = u;
do_redo();
do_redo();
do_redo();
return;
case COUPLE_END:
redidmsg = u->strdata;
goto_line_posx(u->tail_lineno, u->tail_x);
openfile->current_y = u->head_lineno;
adjust_viewport(STATIONARY);
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:
break;
}
if (redidmsg)
statusline(HUSH, _("Redid %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 buffer was last saved, unset "Modified". */
if (openfile->current_undo == openfile->last_saved) {
openfile->modified = FALSE;
titlebar(NULL);
} else if (!suppress_modification)
set_modified();
}
#endif /* !NANO_TINY */
/* Break the current line at the cursor position. */
void do_enter(void)
{
linestruct *newnode = make_new_node(openfile->current);
size_t extra = 0;
#ifndef NANO_TINY
linestruct *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(BREAK_LONG_LINES) && 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 = nmalloc(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;
}
#endif
/* Make the current line end at the cursor position. */
openfile->current->data[openfile->current_x] = '\0';
#ifndef NANO_TINY
add_undo(ENTER, NULL);
/* 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_from(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
if (ISSET(AUTOINDENT) && !allblanks)
openfile->totsize += extra;
update_undo(ENTER);
#endif
refresh_needed = TRUE;
focusing = FALSE;
}
#ifndef NANO_TINY
/* Discard undo items that are newer than the given one, or all if NULL. */
void discard_until(const undostruct *thisitem)
{
undostruct *dropit = openfile->undotop;
groupstruct *group;
while (dropit != NULL && dropit != thisitem) {
openfile->undotop = dropit->next;
free(dropit->strdata);
free_lines(dropit->cutbuffer);
group = dropit->grouping;
while (group != NULL) {
groupstruct *next = group->next;
free_chararray(group->indentations,
group->bottom_line - group->top_line + 1);
free(group);
group = next;
}
free(dropit);
dropit = openfile->undotop;
}
/* Adjust the pointer to the top of the undo stack. */
openfile->current_undo = (undostruct *)thisitem;
/* Prevent a chain of editing actions from continuing. */
openfile->last_action = OTHER;
}
/* Add a new undo item of the given type to the top of the current pile. */
void add_undo(undo_type action, const char *message)
{
undostruct *u = nmalloc(sizeof(undostruct));
linestruct *thisline = openfile->current;
/* Initialize the newly allocated undo item. */
u->type = action;
u->strdata = NULL;
u->cutbuffer = NULL;
u->head_lineno = thisline->lineno;
u->head_x = openfile->current_x;
u->tail_lineno = thisline->lineno;
u->tail_x = openfile->current_x;
u->wassize = openfile->totsize;
u->newsize = openfile->totsize;
u->grouping = NULL;
u->xflags = 0;
/* Blow away any undone items. */
discard_until(openfile->current_undo);
#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) {
action = openfile->undotop->type;
u->wassize = openfile->undotop->wassize;
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 (thisline == openfile->filebot)
u->xflags |= INCLUDED_LAST_LINE;
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 (thisline->next == openfile->filebot && thisline->data[0] != '\0')
u->xflags |= WAS_BACKSPACE_AT_EOF;
/* Fall-through. */
case DEL:
/* When not at the end of a line, store the deleted character;
* otherwise, morph the undo item into a line join. */
if (thisline->data[openfile->current_x] != '\0') {
int charlen = char_length(thisline->data + u->head_x);
u->strdata = measured_copy(thisline->data + u->head_x, charlen);
if (u->type == BACK)
u->tail_x += charlen;
break;
}
action = JOIN;
if (thisline->next != NULL) {
if (u->type == BACK) {
u->head_lineno = thisline->next->lineno;
u->head_x = 0;
}
u->strdata = copy_of(thisline->next->data);
}
u->type = JOIN;
break;
case REPLACE:
u->strdata = copy_of(thisline->data);
if (thisline == openfile->filebot && answer[0] != '\0')
u->xflags |= INCLUDED_LAST_LINE;
break;
#ifdef ENABLE_WRAPPING
case SPLIT_BEGIN:
case SPLIT_END:
break;
#endif
case CUT_TO_EOF:
u->xflags |= (INCLUDED_LAST_LINE | CURSOR_WAS_AT_HEAD);
if (openfile->current->has_anchor)
u->xflags |= HAD_ANCHOR_AT_START;
break;
case ZAP:
case CUT:
if (openfile->mark) {
if (mark_is_before_cursor()){
u->head_lineno = openfile->mark->lineno;
u->head_x = openfile->mark_x;
u->xflags |= MARK_WAS_SET;
} else {
u->tail_lineno = openfile->mark->lineno;
u->tail_x = openfile->mark_x;
u->xflags |= (MARK_WAS_SET | CURSOR_WAS_AT_HEAD);
}
if (u->tail_lineno == openfile->filebot->lineno)
u->xflags |= INCLUDED_LAST_LINE;
} else if (!ISSET(CUT_FROM_CURSOR)) {
/* The entire line is being cut regardless of the cursor position. */
u->xflags |= (WAS_WHOLE_LINE | CURSOR_WAS_AT_HEAD);
u->tail_x = 0;
} else
u->xflags |= CURSOR_WAS_AT_HEAD;
if ((openfile->mark && mark_is_before_cursor() && openfile->mark->has_anchor) ||
((!openfile->mark || !mark_is_before_cursor()) && openfile->current->has_anchor))
u->xflags |= HAD_ANCHOR_AT_START;
break;
case PASTE:
u->cutbuffer = copy_buffer(cutbuffer);
/* Fall-through. */
case INSERT:
if (thisline == openfile->filebot)
u->xflags |= INCLUDED_LAST_LINE;
break;
case COUPLE_BEGIN:
u->tail_lineno = openfile->current_y;
/* Fall-through. */
case COUPLE_END:
u->strdata = copy_of(_(message));
break;
case INDENT:
case UNINDENT:
#ifdef ENABLE_COMMENT
case COMMENT:
case UNCOMMENT:
#endif
break;
default:
die("Bad undo type -- please report a bug\n");
}
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)
{
undostruct *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 = lineno - u->grouping->top_line + 1;
u->grouping->bottom_line = lineno;
u->grouping->indentations = nrealloc(u->grouping->indentations,
number_of_lines * sizeof(char *));
u->grouping->indentations[number_of_lines - 1] = copy_of(indentation);
} else {
groupstruct *born = nmalloc(sizeof(groupstruct));
born->top_line = lineno;
born->bottom_line = lineno;
born->indentations = nmalloc(sizeof(char *));
born->indentations[0] = copy_of(indentation);
born->next = u->grouping;
u->grouping = born;
}
/* Store the file size after the change, to be used when redoing. */
u->newsize = openfile->totsize;
}
/* Update an undo item with (among other things) the file size and
* cursor position after the given action. */
void update_undo(undo_type action)
{
undostruct *u = openfile->undotop;
size_t datalen, newlen;
char *textposition;
int charlen;
if (u->type != action)
die("Mismatching undo type -- please report a bug\n");
u->newsize = openfile->totsize;
switch (u->type) {
case ADD:
newlen = openfile->current_x - u->head_x;
u->strdata = nrealloc(u->strdata, newlen + 1);
strncpy(u->strdata, openfile->current->data + u->head_x, newlen);
u->strdata[newlen] = '\0';
u->tail_x = openfile->current_x;
break;
case ENTER:
u->strdata = copy_of(openfile->current->data);
u->tail_x = openfile->current_x;
break;
case BACK:
case DEL:
textposition = openfile->current->data + openfile->current_x;
charlen = char_length(textposition);
datalen = strlen(u->strdata);
if (openfile->current_x == u->head_x) {
/* They deleted more: add removed character after earlier stuff. */
u->strdata = nrealloc(u->strdata, datalen + charlen + 1);
strncpy(u->strdata + datalen, textposition, charlen);
u->strdata[datalen + charlen] = '\0';
u->tail_x = openfile->current_x;
} else if (openfile->current_x == u->head_x - charlen) {
/* They backspaced further: add removed character before earlier. */
u->strdata = nrealloc(u->strdata, datalen + charlen + 1);
memmove(u->strdata + charlen, u->strdata, datalen + 1);
strncpy(u->strdata, textposition, charlen);
u->head_x = openfile->current_x;
} else
/* They deleted *elsewhere* on the line: start a new undo item. */
add_undo(u->type, NULL);
break;
case REPLACE:
break;
#ifdef ENABLE_WRAPPING
case SPLIT_BEGIN:
case SPLIT_END:
break;
#endif
case ZAP:
case CUT_TO_EOF:
case CUT:
if (u->type == ZAP)
u->cutbuffer = cutbuffer;
else if (cutbuffer != NULL) {
free_lines(u->cutbuffer);
u->cutbuffer = copy_buffer(cutbuffer);
}
if (!(u->xflags & MARK_WAS_SET)) {
linestruct *bottomline = u->cutbuffer;
size_t count = 0;
/* Find the end of the cut for the undo/redo, using our copy. */
while (bottomline->next != NULL) {
bottomline = bottomline->next;
count++;
}
u->tail_lineno = u->head_lineno + count;
if (ISSET(CUT_FROM_CURSOR) || u->type == CUT_TO_EOF) {
u->tail_x = strlen(bottomline->data);
if (count == 0)
u->tail_x += u->head_x;
} else if (openfile->current == openfile->filebot && ISSET(NO_NEWLINES))
u->tail_x = strlen(bottomline->data);
}
break;
case COUPLE_BEGIN:
break;
case COUPLE_END:
case PASTE:
case INSERT:
u->tail_lineno = openfile->current->lineno;
u->tail_x = openfile->current_x;
break;
default:
die("Bad undo type -- please report a bug\n");
}
}
#endif /* !NANO_TINY */
#ifdef ENABLE_WRAPPING
/* When the current line is overlong, hard-wrap it at the furthest possible
* whitespace character, and (if possible) prepend the remainder of the line
* to the next line. Return TRUE if wrapping occurred, and FALSE otherwise. */
bool do_wrap(void)
{
linestruct *line = openfile->current;
/* The line to be wrapped, if needed and possible. */
size_t line_len = strlen(line->data);
/* The length of this line. */
#ifdef ENABLE_JUSTIFY
size_t quot_len = quote_length(line->data);
/* The length of the quoting part of this line. */
size_t lead_len = quot_len + indent_length(line->data + quot_len);
/* The length of the quoting part plus subsequent whitespace. */
#else
size_t lead_len = indent_length(line->data);
#endif
size_t cursor_x = openfile->current_x;
/* The current cursor position, for comparison with the wrap point. */
ssize_t wrap_loc;
/* The position in the line's text where we wrap. */
const char *remainder;
/* The text after the wrap point. */
size_t rest_length;
/* The length of the remainder. */
/* First find the last blank character where we can break the line. */
wrap_loc = break_line(line->data + lead_len,
wrap_at - wideness(line->data, lead_len), FALSE);
/* If no wrapping point was found before end-of-line, we don't wrap. */
if (wrap_loc < 0 || lead_len + wrap_loc == line_len)
return FALSE;
/* Adjust the wrap location to its position in the full line,
* and step forward to the character just after the blank. */
wrap_loc = lead_len + step_right(line->data + lead_len, wrap_loc);
/* When now at end-of-line, no need to wrap. */
if (line->data[wrap_loc] == '\0')
return FALSE;
#ifndef NANO_TINY
add_undo(SPLIT_BEGIN, NULL);
#endif
#ifdef ENABLE_JUSTIFY
bool autowhite = ISSET(AUTOINDENT);
if (quot_len > 0)
UNSET(AUTOINDENT);
#endif
/* The remainder is the text that will be wrapped to the next line. */
remainder = line->data + wrap_loc;
rest_length = line_len - wrap_loc;
/* When prepending and the remainder of this line will not make the next
* line too long, then join the two lines, so that, after the line wrap,
* the remainder will effectively have been prefixed to the next line. */
if (openfile->spillage_line && openfile->spillage_line == line->next &&
rest_length + breadth(line->next->data) <= wrap_at) {
/* Go to the end of this line. */
openfile->current_x = line_len;
/* If the remainder doesn't end in a blank, add a space. */
if (!is_blank_char(remainder + step_left(remainder, rest_length))) {
#ifndef NANO_TINY
add_undo(ADD, NULL);
#endif
line->data = nrealloc(line->data, line_len + 2);
line->data[line_len] = ' ';
line->data[line_len + 1] = '\0';
rest_length++;
openfile->totsize++;
openfile->current_x++;
#ifndef NANO_TINY
update_undo(ADD);
#endif
}
/* Join the next line to this one. */
do_delete();
#ifdef ENABLE_JUSTIFY
/* If the leading part of the current line equals the leading part of
* what was the next line, then strip this second leading part. */
if (strncmp(line->data, line->data + openfile->current_x, lead_len) == 0)
for (size_t i = lead_len; i > 0; i--)
do_delete();
#endif
/* Remove any extra blanks. */
while (is_blank_char(&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 rear_x = step_left(line->data, wrap_loc);
size_t typed_x = step_left(line->data, cursor_x);
while ((rear_x != typed_x || cursor_x >= wrap_loc) &&
is_blank_char(line->data + rear_x)) {
openfile->current_x = rear_x;
do_delete();
rear_x = step_left(line->data, rear_x);
}
}
/* Now split the line. */
do_enter();
#ifdef ENABLE_JUSTIFY
/* If the original line has quoting, copy it to the spillage line. */
if (quot_len > 0) {
line = line->next;
line_len = strlen(line->data);
line->data = nrealloc(line->data, lead_len + line_len + 1);
memmove(line->data + lead_len, line->data, line_len + 1);
strncpy(line->data, line->prev->data, lead_len);
openfile->current_x += lead_len;
openfile->totsize += lead_len;
#ifndef NANO_TINY
free(openfile->undotop->strdata);
update_undo(ENTER);
#endif
if (autowhite)
SET(AUTOINDENT);
}
#endif
openfile->spillage_line = openfile->current;
if (cursor_x < wrap_loc) {
openfile->current = openfile->current->prev;
openfile->current_x = cursor_x;
} else
openfile->current_x += (cursor_x - wrap_loc);
openfile->placewewant = xplustabs();
#ifndef NANO_TINY
add_undo(SPLIT_END, NULL);
#endif
return TRUE;
}
#endif /* ENABLE_WRAPPING */
#if defined(ENABLE_HELP) || defined(ENABLED_WRAPORJUSTIFY)
/* Find the last blank in the given piece of text such that the display width
* to that point is at most (goal + 1). When there is no such blank, then find
* the first blank. Return the index of the last blank in that group of blanks.
* When snap_at_nl is TRUE, a newline character counts as a blank too. */
ssize_t break_line(const char *textstart, ssize_t goal, bool snap_at_nl)
{
const char *lastblank = NULL;
/* The point where the last blank was found, if any. */
const char *pointer = textstart;
/* An iterator through the given line of text. */
size_t column = 0;
/* The column number that corresponds to the position of the pointer. */
/* Skip over leading whitespace, where a line should never be broken. */
while (*pointer != '\0' && is_blank_char(pointer))
pointer += advance_over(pointer, &column);
/* Find the last blank that does not overshoot the target column.
* When treating a help text, do not break in the keystrokes area. */
while (*pointer != '\0' && ((ssize_t)column <= goal)) {
if (is_blank_char(pointer) && (!inhelp || column > 17 || goal < 40))
lastblank = pointer;
#ifdef ENABLE_HELP
else if (snap_at_nl && *pointer == '\n') {
lastblank = pointer;
break;
}
#endif
pointer += advance_over(pointer, &column);
}
/* If the whole line displays shorter than goal, we're done. */
if ((ssize_t)column <= goal)
return (pointer - textstart);
#ifdef ENABLE_HELP
/* When wrapping a help text and no blank was found, force a line break. */
if (snap_at_nl && lastblank == NULL)
return step_left(textstart, pointer - textstart);
#endif
/* If no blank was found within the goal width, seek one after it. */
while (lastblank == NULL) {
if (*pointer == '\0')
return -1;
if (is_blank_char(pointer))
lastblank = pointer;
else
pointer += char_length(pointer);
}
pointer = lastblank + char_length(lastblank);
/* Skip any consecutive blanks after the last blank. */
while (*pointer != '\0' && is_blank_char(pointer)) {
lastblank = pointer;
pointer += char_length(pointer);
}
return (lastblank - textstart);
}
#endif /* ENABLE_HELP || ENABLED_WRAPORJUSTIFY */
#if !defined(NANO_TINY) || defined(ENABLED_WRAPORJUSTIFY)
/* Return the length of the indentation part of the given line. The
* "indentation" of a line is the leading consecutive whitespace. */
size_t indent_length(const char *line)
{
const char *start = line;
while (*line != '\0' && is_blank_char(line))
line += char_length(line);
return (line - start);
}
#endif
#ifdef ENABLE_JUSTIFY
/* Return the length of the quote part of the given line. The "quote part"
* of a line is the largest initial substring matching the quoting regex. */
size_t quote_length(const char *line)
{
regmatch_t matches;
int rc = regexec(&quotereg, line, 1, &matches, 0);
if (rc == REG_NOMATCH || matches.rm_so == (regoff_t)-1)
return 0;
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 linestruct *const line, int depth)
{
size_t quot_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->filetop)
return TRUE;
/* If recursion is going too deep, just say it's not a BOP. */
if (depth > RECURSION_LIMIT)
return FALSE;
quot_len = quote_length(line->data);
indent_len = indent_length(line->data + quot_len);
/* If this line contains no text, it is not a BOP. */
if (line->data[quot_len + indent_len] == '\0')
return FALSE;
/* When requested, treat a line that starts with whitespace as a BOP. */
if (ISSET(BOOKSTYLE) && !ISSET(AUTOINDENT) && is_blank_char(line->data))
return TRUE;
/* If the quote part of the preceding line differs, this is a BOP. */
if (quot_len != quote_length(line->prev->data) ||
strncmp(line->data, line->prev->data, quot_len) != 0)
return TRUE;
prev_dent_len = indent_length(line->prev->data + quot_len);
/* If the preceding line contains no text, this is a BOP. */
if (line->prev->data[quot_len + prev_dent_len] == '\0')
return TRUE;
/* If indentation of this and preceding line are equal, this is not a BOP. */
if (wideness(line->prev->data, quot_len + prev_dent_len) ==
wideness(line->data, quot_len + indent_len))
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: when it
* contains something more than quoting and leading whitespace. */
bool inpar(const linestruct *const line)
{
size_t quot_len = quote_length(line->data);
size_t indent_len = indent_length(line->data + quot_len);
return (line->data[quot_len + indent_len] != '\0');
}
/* Find the first occurring paragraph in the forward direction. Return TRUE
* when a paragraph was found, and FALSE otherwise. Furthermore, return the
* first line and the number of lines of the paragraph. */
bool find_paragraph(linestruct **firstline, size_t *const linecount)
{
linestruct *line = *firstline;
/* When not currently in a paragraph, move forward to a line that is. */
while (!inpar(line) && line->next != NULL)
line = line->next;
*firstline = line;
/* Move down to the last line of the paragraph (if any). */
do_para_end(&line);
/* When not in a paragraph now, there aren't any paragraphs left. */
if (!inpar(line))
return FALSE;
/* We found a paragraph; determine its number of lines. */
*linecount = line->lineno - (*firstline)->lineno + 1;
return TRUE;
}
/* Concatenate into a single line all the lines of the paragraph that starts at
* *line and consists of 'count' lines, skipping the quoting and indentation on
* all lines after the first. */
void concat_paragraph(linestruct *line, size_t count)
{
while (count > 1) {
linestruct *next_line = line->next;
size_t next_line_len = strlen(next_line->data);
size_t next_quot_len = quote_length(next_line->data);
size_t next_lead_len = next_quot_len +
indent_length(next_line->data + next_quot_len);
size_t line_len = strlen(line->data);
/* 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 && line->data[line_len - 1] != ' ') {
line->data = nrealloc(line->data, line_len + 2);
line->data[line_len++] = ' ';
line->data[line_len] = '\0';
}
line->data = nrealloc(line->data,
line_len + next_line_len - next_lead_len + 1);
strcat(line->data, next_line->data + next_lead_len);
#ifndef NANO_TINY
line->has_anchor |= next_line->has_anchor;
#endif
unlink_node(next_line);
count--;
}
}
/* Copy a character from one place to another. */
void copy_character(char **from, char **to)
{
int charlen = char_length(*from);
if (*from == *to) {
*from += charlen;
*to += charlen;
} else
while (--charlen >= 0)
*((*to)++) = *((*from)++);
}
/* In the given line, replace any series of blanks with a single space,
* but keep two spaces (if there are two) after any closing punctuation,
* and remove all blanks from the end of the line. Leave the first skip
* number of characters untreated. */
void squeeze(linestruct *line, size_t skip)
{
char *start = line->data + skip;
char *from = start, *to = start;
/* For each character, 1) when a blank, change it to a space, and pass over
* all blanks after it; 2) if it is punctuation, copy it plus a possible
* tailing bracket, and change at most two subsequent blanks to spaces, and
* pass over all blanks after these; 3) leave anything else unchanged. */
while (*from != '\0') {
if (is_blank_char(from)) {
from += char_length(from);
*(to++) = ' ';
while (*from != '\0' && is_blank_char(from))
from += char_length(from);
} else if (mbstrchr(punct, from) != NULL) {
copy_character(&from, &to);
if (*from != '\0' && mbstrchr(brackets, from) != NULL)
copy_character(&from, &to);
if (*from != '\0' && is_blank_char(from)) {
from += char_length(from);
*(to++) = ' ';
}
if (*from != '\0' && is_blank_char(from)) {
from += char_length(from);
*(to++) = ' ';
}
while (*from != '\0' && is_blank_char(from))
from += char_length(from);
} else
copy_character(&from, &to);
}
/* If there are spaces at the end of the line, remove them. */
while (to > start && *(to - 1) == ' ')
to--;
*to = '\0';
}
/* Rewrap the given line (that starts with the given lead string which is of
* the given length), into lines that fit within the target width (wrap_at). */
void rewrap_paragraph(linestruct **line, char *lead_string, size_t lead_len)
{
ssize_t break_pos;
/* The x-coordinate where the current line is to be broken. */
while (breadth((*line)->data) > wrap_at) {
size_t line_len = strlen((*line)->data);
/* Find a point in the line where it can be broken. */
break_pos = break_line((*line)->data + lead_len,
wrap_at - wideness((*line)->data, lead_len), FALSE);
/* If we can't break the line, or don't need to, we're done. */
if (break_pos < 0 || lead_len + break_pos == 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 copy the leading part
* plus the text after the breaking point into it. */
splice_node(*line, make_new_node(*line));
(*line)->next->data = nmalloc(lead_len + line_len - break_pos + 1);
strncpy((*line)->next->data, lead_string, lead_len);
strcpy((*line)->next->data + lead_len, (*line)->data + break_pos);
/* When requested, snip the one or two trailing spaces. */
if (ISSET(TRIM_BLANKS)) {
while (break_pos > 0 && (*line)->data[break_pos - 1] == ' ')
break_pos--;
}
/* Now actually break the current line, and go to the next. */
(*line)->data[break_pos] = '\0';
*line = (*line)->next;
}
/* When possible, go to the line after the rewrapped paragraph. */
if ((*line)->next != NULL)
*line = (*line)->next;
}
/* Justify the lines of the given paragraph (that starts at *line, and consists
* of 'count' lines) so they all fit within the target width (wrap_at) and have
* their whitespace normalized. */
void justify_paragraph(linestruct **line, size_t count)
{
linestruct *sampleline;
/* The line from which the indentation is copied. */
size_t quot_len;
/* Length of the quote part. */
size_t lead_len;
/* Length of the quote part plus the indentation part. */
char *lead_string;
/* The quote+indent stuff that is copied from the sample line. */
/* The sample line is either the only line or the second line. */
sampleline = (count == 1 ? *line : (*line)->next);
/* Copy the leading part (quoting + indentation) of the sample line. */
quot_len = quote_length(sampleline->data);
lead_len = quot_len + indent_length(sampleline->data + quot_len);
lead_string = measured_copy(sampleline->data, lead_len);
/* Concatenate all lines of the paragraph into a single line. */
concat_paragraph(*line, count);
/* Change all blank characters to spaces and remove excess spaces. */
squeeze(*line, quot_len + indent_length((*line)->data + quot_len));
/* Rewrap the line into multiple lines, accounting for the leading part. */
rewrap_paragraph(line, lead_string, lead_len);
free(lead_string);
}
#define ONE_PARAGRAPH FALSE
#define WHOLE_BUFFER TRUE
/* Justify the current paragraph, or the entire buffer when whole_buffer is
* TRUE. But if the mark is on, justify only the marked text instead. */
void justify_text(bool whole_buffer)
{
size_t linecount;
/* The number of lines in the original paragraph. */
linestruct *startline;
/* The line where the paragraph or region starts. */
linestruct *endline;
/* The line where the paragraph or region ends. */
size_t start_x;
/* The x position where the paragraph or region starts. */
size_t end_x;
/* The x position where the paragraph or region ends. */
linestruct *was_cutbuffer = cutbuffer;
/* The old cutbuffer, so we can justify in the current cutbuffer. */
linestruct *jusline;
/* The line that we're justifying in the current cutbuffer. */
#ifndef NANO_TINY
bool before_eol = FALSE;
/* Whether the end of a marked region is before the end of its line. */
char *primary_lead = NULL;
/* The leading part (quoting + indentation) of the first line
* of the paragraph where the marked region begins. */
size_t primary_len = 0;
/* The length (in bytes) of the above first-line leading part. */
char *secondary_lead = NULL;
/* The leading part for lines after the first one. */
size_t secondary_len = 0;
/* The length of that later lead. */
/* TRANSLATORS: This one goes with Undid/Redid messages. */
add_undo(COUPLE_BEGIN, N_("justification"));
/* If the mark is on, do as Pico: treat all marked text as one paragraph. */
if (openfile->mark) {
size_t quot_len, fore_len, other_quot_len, other_white_len;
linestruct *sampleline;
get_region(&startline, &start_x, &endline, &end_x);
/* When the marked region is empty, do nothing. */
if (startline == endline && start_x == end_x) {
statusline(AHEM, _("Selection is empty"));
discard_until(openfile->undotop->next);
return;
}
quot_len = quote_length(startline->data);
fore_len = quot_len + indent_length(startline->data + quot_len);
/* When the region starts IN the lead, take the whole lead. */
if (start_x <= fore_len)
start_x = 0;
/* Recede over blanks before the region. This effectively snips
* trailing blanks from what will become the preceding paragraph. */
while (start_x > 0 && is_blank_char(&startline->data[start_x - 1]))
start_x = step_left(startline->data, start_x);
quot_len = quote_length(endline->data);
fore_len = quot_len + indent_length(endline->data + quot_len);
/* When the region ends IN the lead, take the whole lead. */
if (0 < end_x && end_x < fore_len)
end_x = fore_len;
/* When not at the left edge, advance over blanks after the region. */
while (end_x > 0 && is_blank_char(&endline->data[end_x]))
end_x = step_right(endline->data, end_x);
sampleline = startline;
/* Find the first line of the paragraph in which the region starts. */
while (sampleline->prev && inpar(sampleline) && !begpar(sampleline, 0))
sampleline = sampleline->prev;
/* Ignore lines that contain no text. */
while (sampleline->next && !inpar(sampleline))
sampleline = sampleline->next;
/* Store the leading part that is to be used for the new paragraph. */
quot_len = quote_length(sampleline->data);
primary_len = quot_len + indent_length(sampleline->data + quot_len);
primary_lead = measured_copy(sampleline->data, primary_len);
if (sampleline->next && startline != endline)
sampleline = sampleline->next;
/* Copy the leading part that is to be used for the new paragraph after
* its first line (if any): the quoting of the first line, plus the
* indentation of the second line. */
other_quot_len = quote_length(sampleline->data);
other_white_len = indent_length(sampleline->data + other_quot_len);
secondary_len = quot_len + other_white_len;
secondary_lead = nmalloc(secondary_len + 1);
strncpy(secondary_lead, startline->data, quot_len);
strncpy(secondary_lead + quot_len, sampleline->data + other_quot_len,
other_white_len);
secondary_lead[secondary_len] = '\0';
/* Include preceding and succeeding leads into the marked region. */
openfile->mark = startline;
openfile->mark_x = start_x;
openfile->current = endline;
openfile->current_x = end_x;
linecount = endline->lineno - startline->lineno + (end_x > 0 ? 1 : 0);
/* Remember whether the end of the region was before the end-of-line. */
before_eol = endline->data[end_x] != '\0';
} else
#endif /* NANO_TINY */
{
/* When justifying the entire buffer, start at the top. Otherwise, when
* in a paragraph but not at its beginning, move back to its first line. */
if (whole_buffer)
openfile->current = openfile->filetop;
else if (inpar(openfile->current) && !begpar(openfile->current, 0))
do_para_begin(&openfile->current);
/* Find the first line of the paragraph(s) to be justified. If the
* search fails, there is nothing to justify, and we will be on the
* last line of the file, so put the cursor at the end of it. */
if (!find_paragraph(&openfile->current, &linecount)) {
openfile->current_x = strlen(openfile->filebot->data);
#ifndef NANO_TINY
discard_until(openfile->undotop->next);
#endif
refresh_needed = TRUE;
return;
}
/* Set the starting point of the paragraph. */
startline = openfile->current;
start_x = 0;
/* Set the end point of the paragraph. */
if (whole_buffer)
endline = openfile->filebot;
else {
endline = startline;
for (size_t count = linecount; count > 1; count--)
endline = endline->next;
}
/* When possible, step one line further; otherwise, to line's end. */
if (endline->next != NULL) {
endline = endline->next;
end_x = 0;
} else
end_x = strlen(endline->data);
}
#ifndef NANO_TINY
add_undo(CUT, NULL);
#endif
/* Do the equivalent of a marked cut into an empty cutbuffer. */
cutbuffer = NULL;
extract_segment(startline, start_x, endline, end_x);
#ifndef NANO_TINY
update_undo(CUT);
if (openfile->mark) {
linestruct *line = cutbuffer;
size_t quot_len = quote_length(line->data);
size_t fore_len = quot_len + indent_length(line->data + quot_len);
size_t text_len = strlen(line->data) - fore_len;
/* If the extracted region begins with any leading part, trim it. */
if (fore_len > 0)
memmove(line->data, line->data + fore_len, text_len + 1);
/* Then copy back in the leading part that it should have. */
if (primary_len > 0) {
line->data = nrealloc(line->data, primary_len + text_len + 1);
memmove(line->data + primary_len, line->data, text_len + 1);
strncpy(line->data, primary_lead, primary_len);
}
/* Now justify the extracted region. */
concat_paragraph(cutbuffer, linecount);
squeeze(cutbuffer, primary_len);
rewrap_paragraph(&line, secondary_lead, secondary_len);
/* If the marked region started in the middle of a line,
* insert a newline before the new paragraph. */
if (start_x > 0) {
cutbuffer->prev = make_new_node(NULL);
cutbuffer->prev->data = copy_of("");
cutbuffer->prev->next = cutbuffer;
cutbuffer = cutbuffer->prev;
}
/* If the marked region ended in the middle of a line,
* insert a newline after the new paragraph. */
if (end_x > 0 && before_eol) {
line->next = make_new_node(line);
line->next->data = copy_of(primary_lead);
}
free(secondary_lead);
free(primary_lead);
} else
#endif
{
/* Prepare to justify the text we just put in the cutbuffer. */
jusline = cutbuffer;
/* Justify the current paragraph. */
justify_paragraph(&jusline, linecount);
/* When justifying the entire buffer, find and justify all paragraphs. */
if (whole_buffer) {
while (find_paragraph(&jusline, &linecount)) {
justify_paragraph(&jusline, linecount);
if (jusline->next == NULL)
break;
}
}
}
#ifndef NANO_TINY
/* Wipe an anchor on the first paragraph if it was only inherited. */
if (whole_buffer && !openfile->mark && !cutbuffer->has_anchor)
openfile->current->has_anchor = FALSE;
add_undo(PASTE, NULL);
#endif
/* Do the equivalent of a paste of the justified text. */
ingraft_buffer(cutbuffer);
#ifndef NANO_TINY
update_undo(PASTE);
/* After justifying a backward-marked text, swap mark and cursor. */
if (openfile->mark && !mark_is_before_cursor()) {
linestruct *bottom = openfile->current;
size_t bottom_x = openfile->current_x;
openfile->current = openfile->mark;
openfile->current_x = openfile->mark_x;
openfile->mark = bottom;
openfile->mark_x = bottom_x;
}
add_undo(COUPLE_END, N_("justification"));
/* Report on the status bar what we justified. */
if (openfile->mark)
statusline(REMARK, _("Justified selection"));
else
#endif
if (whole_buffer)
statusline(REMARK, _("Justified file"));
else
statusbar(_("Justified paragraph"));
/* We're done justifying. Restore the cutbuffer. */
cutbuffer = was_cutbuffer;
/* Set the desired screen column (always zero, except at EOF). */
openfile->placewewant = xplustabs();
set_modified();
refresh_needed = TRUE;
shift_held = TRUE;
}
/* Justify the current paragraph. */
void do_justify(void)
{
justify_text(ONE_PARAGRAPH);
}
/* Justify the entire file. */
void do_full_justify(void)
{
justify_text(WHOLE_BUFFER);
ran_a_tool = 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 = copy_of(command);
char *element = strtok(copy_of_command, " ");
int count = 2;
while (element != NULL) {
*arguments = nrealloc(*arguments, ++count * sizeof(char *));
(*arguments)[count - 3] = element;
element = strtok(NULL, " ");
}
(*arguments)[count - 2] = filename;
(*arguments)[count - 1] = NULL;
}
/* Open the specified file, and if that succeeds, remove the text of the marked
* region or of the entire buffer and read the file contents into its place. */
bool replace_buffer(const char *filename, undo_type action, const char *operation)
{
linestruct *was_cutbuffer = cutbuffer;
int descriptor;
FILE *stream;
descriptor = open_file(filename, FALSE, &stream);
if (descriptor < 0)
return FALSE;
cutbuffer = NULL;
#ifndef NANO_TINY
add_undo(COUPLE_BEGIN, operation);
/* Cut either the marked region or the whole buffer. */
add_undo(action, NULL);
do_snip(openfile->mark != NULL, openfile->mark == NULL, FALSE);
update_undo(action);
#else
do_snip(FALSE, TRUE, FALSE);
#endif
/* Discard what was cut. */
free_lines(cutbuffer);
cutbuffer = was_cutbuffer;
/* Insert the spell-checked file into the cleared area. */
read_file(stream, descriptor, filename, TRUE);
#ifndef NANO_TINY
add_undo(COUPLE_END, operation);
#endif
return TRUE;
}
/* Execute the given program, with the given temp file as last argument. */
void treat(char *tempfile_name, char *theprogram, bool spelling)
{
ssize_t was_lineno = openfile->current->lineno;
size_t was_pww = openfile->placewewant;
size_t was_x = openfile->current_x;
bool was_at_eol = (openfile->current->data[openfile->current_x] == '\0');
struct stat fileinfo;
long timestamp_sec = 0;
long timestamp_nsec = 0;
static char **arguments = NULL;
pid_t thepid;
int program_status, errornumber;
bool replaced = FALSE;
/* Stat the temporary file. If that succeeds and its size is zero,
* there is nothing to do; otherwise, store its time of modification. */
if (stat(tempfile_name, &fileinfo) == 0) {
if (fileinfo.st_size == 0) {
#ifndef NANO_TINY
if (spelling && openfile->mark)
statusline(AHEM, _("Selection is empty"));
else
#endif
statusline(AHEM, _("Buffer is empty"));
return;
}
timestamp_sec = (long)fileinfo.st_mtim.tv_sec;
timestamp_nsec = (long)fileinfo.st_mtim.tv_nsec;
}
/* Exit from curses mode to give the program control of the terminal. */
endwin();
construct_argument_list(&arguments, theprogram, tempfile_name);
/* Fork a child process and run the given program in it. */
if ((thepid = fork()) == 0) {
execvp(arguments[0], arguments);
/* Terminate the child if the program is not found. */
exit(9);
} else if (thepid > 0) {
/* Block SIGWINCHes while waiting for the forked program to end,
* so nano doesn't get pushed past the wait(). */
block_sigwinch(TRUE);
wait(&program_status);
block_sigwinch(FALSE);
}
errornumber = errno;
/* Restore the terminal state and reenter curses mode. */
terminal_init();
doupdate();
if (thepid < 0) {
statusline(ALERT, _("Could not fork: %s"), strerror(errornumber));
free(arguments[0]);
return;
} else if (!WIFEXITED(program_status) || WEXITSTATUS(program_status) > 2) {
statusline(ALERT, _("Error invoking '%s'"), arguments[0]);
free(arguments[0]);
return;
} else if (WEXITSTATUS(program_status) != 0)
statusline(ALERT, _("Program '%s' complained"), arguments[0]);
free(arguments[0]);
/* When the temporary file wasn't touched, say so and leave. */
if (timestamp_sec > 0 && stat(tempfile_name, &fileinfo) == 0 &&
(long)fileinfo.st_mtim.tv_sec == timestamp_sec &&
(long)fileinfo.st_mtim.tv_nsec == timestamp_nsec) {
statusline(REMARK, _("Nothing changed"));
return;
}
#ifndef NANO_TINY
/* Replace the marked text (or entire text) with the corrected text. */
if (spelling && openfile->mark) {
ssize_t was_mark_lineno = openfile->mark->lineno;
bool upright = mark_is_before_cursor();
replaced = replace_buffer(tempfile_name, CUT, "spelling correction");
/* Adjust the end point of the marked region for any change in
* length of the region's last line. */
if (upright)
was_x = openfile->current_x;
else
openfile->mark_x = openfile->current_x;
/* Restore the mark. */
openfile->mark = line_from_number(was_mark_lineno);
} else
#endif
{
openfile->current = openfile->filetop;
openfile->current_x = 0;
replaced = replace_buffer(tempfile_name, CUT_TO_EOF,
/* TRANSLATORS: The next two go with Undid/Redid messages. */
(spelling ? N_("spelling correction") : N_("formatting")));
}
/* Go back to the old position. */
goto_line_posx(was_lineno, was_x);
if (was_at_eol || openfile->current_x > strlen(openfile->current->data))
openfile->current_x = strlen(openfile->current->data);
if (replaced) {
#ifndef NANO_TINY
openfile->filetop->has_anchor = FALSE;
update_undo(COUPLE_END);
#endif
}
openfile->placewewant = was_pww;
adjust_viewport(STATIONARY);
if (spelling)
statusline(REMARK, _("Finished checking spelling"));
else
statusline(REMARK, _("Buffer has been processed"));
}
#endif /* ENABLE_SPELLER || ENABLE_COLOR */
#ifdef ENABLE_SPELLER
/* Let the user edit the misspelled word. Return FALSE if the user cancels. */
bool fix_spello(const char *word)
{
linestruct *was_edittop = openfile->edittop;
linestruct *was_current = openfile->current;
size_t was_firstcolumn = openfile->firstcolumn;
size_t was_x = openfile->current_x;
bool proceed = FALSE;
int result;
#ifndef NANO_TINY
bool right_side_up = (openfile->mark && mark_is_before_cursor());
linestruct *top, *bot;
size_t top_x, bot_x;
/* If the mark is on, start at the beginning of the marked region. */
if (openfile->mark) {
get_region(&top, &top_x, &bot, &bot_x);
/* 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->filetop;
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 = VACUUM;
proceed = TRUE;
napms(2800);
} else if (result == 1) {
spotlighted = TRUE;
light_from_col = xplustabs();
light_to_col = light_from_col + breadth(word);
#ifndef NANO_TINY
linestruct *saved_mark = openfile->mark;
openfile->mark = NULL;
#endif
edit_refresh();
put_cursor_at_end_of_answer();
/* Let the user supply a correctly spelled alternative. */
proceed = (do_prompt(MSPELL, word, NULL, edit_refresh,
/* TRANSLATORS: This is a prompt. */
_("Edit a replacement")) != -1);
spotlighted = FALSE;
#ifndef NANO_TINY
openfile->mark = saved_mark;
#endif
/* If a replacement was given, go through all occurrences. */
if (proceed && strcmp(word, answer) != 0) {
do_replace_loop(word, TRUE, was_current, &was_x);
/* 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 = was_current;
openfile->current_x = was_x;
}
/* Restore the viewport to where it was. */
openfile->edittop = was_edittop;
openfile->firstcolumn = was_firstcolumn;
return proceed;
}
/* Run a spell-check on the given file, using 'spell' to produce a list of all
* misspelled words, then feeding those through 'sort' and 'uniq' to obtain an
* alphabetical list, which words are then offered one by one to the user for
* correction. */
void do_int_speller(const char *tempfile_name)
{
char *misspellings, *pointer, *oneword;
long pipesize;
size_t buffersize, bytesread, totalread;
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) {
statusline(ALERT, _("Could not create pipe: %s"), strerror(errno));
return;
}
statusbar(_("Invoking spell checker..."));
/* Fork a process to run spell in. */
if ((pid_spell = fork()) == 0) {
/* Child: open the temporary file that holds the text to be checked. */
if ((tempfile_fd = open(tempfile_name, O_RDONLY)) == -1)
exit(6);
/* Connect standard input to the temporary file. */
if (dup2(tempfile_fd, STDIN_FILENO) < 0)
exit(7);
/* Connect standard output to the write end of the first pipe. */
if (dup2(spell_fd[1], STDOUT_FILENO) < 0)
exit(8);
close(tempfile_fd);
close(spell_fd[0]);
close(spell_fd[1]);
/* Try to run 'hunspell'; if that fails, fall back to 'spell'. */
execlp("hunspell", "hunspell", "-l", NULL);
execlp("spell", "spell", NULL);
/* Indicate failure when neither speller was found. */
exit(9);
}
/* Parent: close the unused write end of the first pipe. */
close(spell_fd[1]);
/* Fork a process to run sort in. */
if ((pid_sort = fork()) == 0) {
/* Connect standard input to the read end of the first pipe. */
if (dup2(spell_fd[0], STDIN_FILENO) < 0)
exit(7);
/* Connect standard output to the write end of the second pipe. */
if (dup2(sort_fd[1], STDOUT_FILENO) < 0)
exit(8);
close(spell_fd[0]);
close(sort_fd[0]);
close(sort_fd[1]);
/* Now run the sort program. Use -f to mix upper and lower case. */
execlp("sort", "sort", "-f", NULL);
exit(9);
}
close(spell_fd[0]);
close(sort_fd[1]);
/* Fork a process to run uniq in. */
if ((pid_uniq = fork()) == 0) {
if (dup2(sort_fd[0], STDIN_FILENO) < 0)
exit(7);
if (dup2(uniq_fd[1], STDOUT_FILENO) < 0)
exit(8);
close(sort_fd[0]);
close(uniq_fd[0]);
close(uniq_fd[1]);
execlp("uniq", "uniq", NULL);
exit(9);
}
close(sort_fd[0]);
close(uniq_fd[1]);
/* When some child process was not forked successfully... */
if (pid_spell < 0 || pid_sort < 0 || pid_uniq < 0) {
statusline(ALERT, _("Could not fork: %s"), strerror(errno));
close(uniq_fd[0]);
return;
}
/* Get the system pipe buffer size. */
pipesize = fpathconf(uniq_fd[0], _PC_PIPE_BUF);
if (pipesize < 1) {
statusline(ALERT, _("Could not get size of pipe buffer"));
close(uniq_fd[0]);
return;
}
/* Leave curses mode so that error messages go to the original screen. */
endwin();
/* Block SIGWINCHes while reading misspelled words from the third pipe. */
block_sigwinch(TRUE);
totalread = 0;
buffersize = pipesize + 1;
misspellings = nmalloc(buffersize);
pointer = misspellings;
while ((bytesread = read(uniq_fd[0], pointer, pipesize)) > 0) {
totalread += bytesread;
buffersize += pipesize;
misspellings = nrealloc(misspellings, buffersize);
pointer = misspellings + totalread;
}
*pointer = '\0';
close(uniq_fd[0]);
block_sigwinch(FALSE);
/* Re-enter curses mode. */
terminal_init();
doupdate();
/* Do any replacements case-sensitively, forward, and without regexes. */
SET(CASE_SENSITIVE);
UNSET(BACKWARDS_SEARCH);
UNSET(USE_REGEXP);
pointer = misspellings;
oneword = misspellings;
/* Process each of the misspelled words. */
while (*pointer != '\0') {
if ((*pointer == '\r') || (*pointer == '\n')) {
*pointer = '\0';
if (oneword != pointer) {
if (!fix_spello(oneword)) {
oneword = pointer;
break;
}
}
oneword = pointer + 1;
}
pointer++;
}
/* Special case: the last word doesn't end with '\r' or '\n'. */
if (oneword != pointer)
fix_spello(oneword);
free(misspellings);
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(uniq_status) == 0 || WEXITSTATUS(uniq_status))
statusline(ALERT, _("Error invoking \"uniq\""));
else if (WIFEXITED(sort_status) == 0 || WEXITSTATUS(sort_status))
statusline(ALERT, _("Error invoking \"sort\""));
else if (WIFEXITED(spell_status) == 0 || WEXITSTATUS(spell_status))
statusline(ALERT, _("Error invoking \"spell\""));
else
statusline(REMARK, _("Finished checking spelling"));
}
/* Spell check the current file. If an alternate spell checker is
* specified, use it. Otherwise, use the internal spell checker. */
void do_spell(void)
{
FILE *stream;
char *temp_name;
unsigned stash[sizeof(flags) / sizeof(flags[0])];
bool okay;
ran_a_tool = TRUE;
if (in_restricted_mode())
return;
temp_name = safe_tempfile(&stream);
if (temp_name == 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)
okay = write_region_to_file(temp_name, stream, TEMPORARY, OVERWRITE);
else
#endif
okay = write_file(temp_name, stream, TEMPORARY, OVERWRITE, NONOTES);
if (!okay) {
statusline(ALERT, _("Error writing temp file: %s"), strerror(errno));
free(temp_name);
return;
}
blank_bottombars();
if (alt_speller && *alt_speller)
treat(temp_name, alt_speller, TRUE);
else
do_int_speller(temp_name);
unlink(temp_name);
free(temp_name);
/* Restore the settings of the global flags. */
memcpy(flags, stash, sizeof(flags));
/* Ensure the help lines will be redrawn and a selection is retained. */
currmenu = MMOST;
shift_held = TRUE;
}
#endif /* ENABLE_SPELLER */
#ifdef ENABLE_COLOR
/* Run a linting program on the current buffer. */
void do_linter(void)
{
char *lintings, *pointer, *onelint;
long pipesize;
size_t buffersize, bytesread, totalread;
bool parsesuccess = FALSE;
int lint_status, lint_fd[2];
pid_t pid_lint;
bool helpless = ISSET(NO_HELP);
lintstruct *lints = NULL, *tmplint = NULL, *curlint = NULL;
time_t last_wait = 0;
ran_a_tool = TRUE;
if (in_restricted_mode())
return;
if (!openfile->syntax || !openfile->syntax->linter) {
statusline(AHEM, _("No linter is defined for this type of file"));
return;
}
#ifndef NANO_TINY
openfile->mark = NULL;
#endif
edit_refresh();
if (openfile->modified) {
int choice = do_yesno_prompt(FALSE, _("Save modified buffer before linting?"));
if (choice == -1) {
statusbar(_("Cancelled"));
return;
} else if (choice == 1 && (do_writeout(FALSE, FALSE) != 1))
return;
}
/* Create a pipe up front. */
if (pipe(lint_fd) == -1) {
statusline(ALERT, _("Could not create pipe: %s"), strerror(errno));
return;
}
blank_bottombars();
currmenu = MLINTER;
statusbar(_("Invoking linter..."));
/* Fork a process to run the linter in. */
if ((pid_lint = fork()) == 0) {
char **lintargs = NULL;
/* Redirect standard output and standard error into the pipe. */
if (dup2(lint_fd[1], STDOUT_FILENO) < 0)
exit(7);
if (dup2(lint_fd[1], STDERR_FILENO) < 0)
exit(8);
close(lint_fd[0]);
close(lint_fd[1]);
construct_argument_list(&lintargs, openfile->syntax->linter, openfile->filename);
/* 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) {
statusline(ALERT, _("Could not fork: %s"), strerror(errno));
close(lint_fd[0]);
return;
}
/* Get the system pipe buffer size. */
pipesize = fpathconf(lint_fd[0], _PC_PIPE_BUF);
if (pipesize < 1) {
statusline(ALERT, _("Could not get size of pipe buffer"));
close(lint_fd[0]);
return;
}
/* Block resizing signals while reading from the pipe. */
block_sigwinch(TRUE);
/* Read in the returned syntax errors. */
totalread = 0;
buffersize = pipesize + 1;
lintings = nmalloc(buffersize);
pointer = lintings;
while ((bytesread = read(lint_fd[0], pointer, pipesize)) > 0) {
totalread += bytesread;
buffersize += pipesize;
lintings = nrealloc(lintings, buffersize);
pointer = lintings + totalread;
}
*pointer = '\0';
close(lint_fd[0]);
block_sigwinch(FALSE);
pointer = lintings;
onelint = lintings;
/* Now parse the output of the linter. */
while (*pointer != '\0') {
if ((*pointer == '\r') || (*pointer == '\n')) {
*pointer = '\0';
if (onelint != pointer) {
char *filename = NULL, *linestr = NULL, *maybecol = NULL;
char *message = copy_of(onelint);
/* The recognized format is "filename:line:column: message",
* where ":column" may be absent or be ",column" instead. */
if (strstr(message, ": ") != NULL) {
filename = strtok(onelint, ":");
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) {
pointer++;
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 = TRUE;
tmplint = curlint;
curlint = nmalloc(sizeof(lintstruct));
curlint->next = NULL;
curlint->prev = tmplint;
if (curlint->prev != NULL)
curlint->prev->next = curlint;
curlint->msg = copy_of(strstr(message, ": ") + 2);
curlint->lineno = tmplineno;
curlint->colno = tmpcolno;
curlint->filename = copy_of(filename);
if (lints == NULL)
lints = curlint;
}
}
}
free(message);
}
onelint = pointer + 1;
}
pointer++;
}
free(lintings);
/* Process the end of the linting process. */
waitpid(pid_lint, &lint_status, 0);
if (!WIFEXITED(lint_status) || WEXITSTATUS(lint_status) > 2) {
statusline(ALERT, _("Error invoking '%s'"), openfile->syntax->linter);
return;
}
if (!parsesuccess) {
statusline(REMARK, _("Got 0 parsable lines from command: %s"),
openfile->syntax->linter);
return;
}
if (helpless && LINES > 4) {
UNSET(NO_HELP);
window_init();
}
/* Show that we are in the linter now. */
titlebar(NULL);
bottombars(MLINTER);
tmplint = NULL;
curlint = lints;
while (TRUE) {
int kbinput;
functionptrtype func;
struct stat lintfileinfo;
if (stat(curlint->filename, &lintfileinfo) != -1 &&
(openfile->statinfo == NULL ||
openfile->statinfo->st_ino != lintfileinfo.st_ino)) {
#ifdef ENABLE_MULTIBUFFER
const openfilestruct *started_at = openfile;
openfile = openfile->next;
while (openfile != started_at && (openfile->statinfo == NULL ||
openfile->statinfo->st_ino != lintfileinfo.st_ino))
openfile = openfile->next;
if (openfile->statinfo == NULL ||
openfile->statinfo->st_ino != lintfileinfo.st_ino) {
char *msg = nmalloc(1024 + strlen(curlint->filename));
int choice;
sprintf(msg, _("This message is for unopened file %s,"
" open it in a new buffer?"), curlint->filename);
choice = do_yesno_prompt(FALSE, msg);
currmenu = MLINTER;
free(msg);
if (choice == -1) {
statusbar(_("Cancelled"));
break;
} else if (choice == 1) {
open_buffer(curlint->filename, TRUE);
} else {
#endif
char *dontwantfile = copy_of(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;
}
}
free(dontwantfile);
if (restlint == NULL) {
statusline(REMARK, _("No messages for this file"));
break;
} else {
curlint = restlint;
continue;
}
#ifdef ENABLE_MULTIBUFFER
}
}
#endif
}
if (tmplint != curlint) {
/* Put the cursor at the reported position, but don't go beyond EOL
* when the second number is a column number instead of an index. */
goto_line_posx(curlint->lineno, curlint->colno - 1);
openfile->current_x = actual_x(openfile->current->data, openfile->placewewant);
titlebar(NULL);
adjust_viewport(CENTERING);
#ifdef ENABLE_LINENUMBERS
confirm_margin();
#endif
edit_refresh();
statusline(NOTICE, 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 || func == do_enter) {
wipe_statusbar();
break;
} else if (func == do_help) {
tmplint = NULL;
do_help();
} else if (func == do_page_up || func == to_prev_block) {
if (curlint->prev != NULL)
curlint = curlint->prev;
else if (last_wait != time(NULL)) {
statusbar(_("At first message"));
beep();
napms(600);
last_wait = time(NULL);
statusline(NOTICE, curlint->msg);
}
} else if (func == do_page_down || func == to_next_block) {
if (curlint->next != NULL)
curlint = curlint->next;
else if (last_wait != time(NULL)) {
statusbar(_("At last message"));
beep();
napms(600);
last_wait = time(NULL);
statusline(NOTICE, curlint->msg);
}
} else
beep();
}
for (curlint = lints; curlint != NULL;) {
tmplint = curlint;
curlint = curlint->next;
free(tmplint->msg);
free(tmplint->filename);
free(tmplint);
}
if (helpless) {
SET(NO_HELP);
window_init();
refresh_needed = TRUE;
}
lastmessage = VACUUM;
currmenu = MMOST;
titlebar(NULL);
}
/* Run a manipulation program on the contents of the buffer. */
void do_formatter(void)
{
FILE *stream;
char *temp_name;
bool okay = FALSE;
ran_a_tool = TRUE;
if (in_restricted_mode())
return;
if (!openfile->syntax || !openfile->syntax->formatter) {
statusline(AHEM, _("No formatter is defined for this type of file"));
return;
}
#ifndef NANO_TINY
openfile->mark = NULL;
#endif
temp_name = safe_tempfile(&stream);
if (temp_name != NULL)
okay = write_file(temp_name, stream, TEMPORARY, OVERWRITE, NONOTES);
if (!okay) {
statusline(ALERT, _("Error writing temp file: %s"), strerror(errno));
free(temp_name);
return;
}
treat(temp_name, openfile->syntax->formatter, FALSE);
unlink(temp_name);
free(temp_name);
}
#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)
{
linestruct *was_current = openfile->current;
size_t was_x = openfile->current_x;
linestruct *topline, *botline;
size_t top_x, bot_x;
size_t words = 0, chars = 0;
ssize_t lines = 0;
/* Set the start and end point of the area to measure: either the marked
* region or the whole buffer. Then compute the number of characters. */
if (openfile->mark) {
get_region(&topline, &top_x, &botline, &bot_x);
if (topline != botline)
chars = number_of_characters_in(topline->next, botline) + 1;
chars += mbstrlen(topline->data + top_x) - mbstrlen(botline->data + bot_x);
} else {
topline = openfile->filetop;
top_x = 0;
botline = openfile->filebot;
bot_x = strlen(botline->data);
chars = openfile->totsize;
}
/* Compute the number of lines. */
lines = botline->lineno - topline->lineno;
lines += (bot_x == 0 || (topline == botline && top_x == bot_x)) ? 0 : 1;
openfile->current = topline;
openfile->current_x = top_x;
/* Keep stepping to the next word (considering punctuation as part of a
* word, as "wc -w" does), until we reach the end of the relevant area,
* incrementing the word count for each successful step. */
while (openfile->current->lineno < botline->lineno ||
(openfile->current == botline && openfile->current_x < bot_x)) {
if (do_next_word(FALSE, TRUE))
words++;
}
/* Restore where we were. */
openfile->current = was_current;
openfile->current_x = was_x;
/* Report on the status bar the number of lines, words, and characters. */
statusline(INFO, _("%s%zd %s, %zu %s, %zu %s"),
openfile->mark ? _("In Selection: ") : "",
lines, P_("line", "lines", lines),
words, P_("word", "words", words),
chars, P_("character", "characters", chars));
}
#endif /* !NANO_TINY */
/* Get verbatim input. */
void do_verbatim_input(void)
{
size_t count = 1;
char *bytes;
/* TRANSLATORS: Shown when the next keystroke will be inserted verbatim. */
statusline(INFO, _("Verbatim Input"));
place_the_cursor();
/* Read in the first one or two bytes of the next keystroke. */
bytes = get_verbatim_kbinput(edit, &count);
/* When something valid was obtained, unsuppress cursor-position display,
* insert the bytes into the edit buffer, and blank the status bar. */
if (count > 0) {
if (ISSET(CONSTANT_SHOW) || ISSET(MINIBAR))
lastmessage = VACUUM;
if (count < 999)
inject(bytes, count);
wipe_statusbar();
} else
/* TRANSLATORS: An invalid verbatim Unicode code was typed. */
statusline(AHEM, _("Invalid code"));
free(bytes);
}
#ifdef ENABLE_WORDCOMPLETION
/* Return a copy of the found completion candidate. */
char *copy_completion(char *text)
{
char *word;
size_t length = 0, index = 0;
/* Find the end of the candidate word to get its length. */
while (is_word_char(&text[length], FALSE))
length = step_right(text, length);
/* Now copy this candidate to a new string. */
word = nmalloc(length + 1);
while (index < length)
word[index++] = *(text++);
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;
completionstruct *some_word;
#ifdef ENABLE_WRAPPING
bool was_set_wrapping = ISSET(BREAK_LONG_LINES);
#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) {
completionstruct *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->filetop;
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) {
size_t oneleft = step_left(openfile->current->data, start_of_shard);
if (!is_word_char(&openfile->current->data[oneleft], FALSE))
break;
start_of_shard = oneleft;
}
/* If there is no word fragment before the cursor, do nothing. */
if (start_of_shard == openfile->current_x) {
/* TRANSLATORS: Shown when no text is directly left of the cursor. */
statusline(AHEM, _("No word fragment"));
pletion_line = NULL;
return;
}
shard = nmalloc(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) {
ssize_t 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; (ssize_t)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_char(&pletion_line->data[i + j], FALSE))
continue;
/* If the match is not a separate word, skip it. */
if (i > 0 && is_word_char(&pletion_line->data[
step_left(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 = nmalloc(sizeof(completionstruct));
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. */
UNSET(BREAK_LONG_LINES);
#endif
/* Inject the completion into the buffer. */
inject(&completion[shard_length], strlen(completion) - shard_length);
#ifdef ENABLE_WRAPPING
/* If needed, reenable wrapping and wrap the current line. */
if (was_set_wrapping) {
SET(BREAK_LONG_LINES);
do_wrap();
}
#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) {
edit_refresh();
statusline(AHEM, _("No further matches"));
} else
/* TRANSLATORS: Shown when there are zero possible completions. */
statusline(AHEM, _("No matches"));
free(shard);
}
#endif /* ENABLE_WORDCOMPLETION */