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review.blissroms.org / platform_external_nano / refs/heads/o8.0-rebase / . / src / text.c
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/**************************************************************************
* text.c -- This file is part of GNU nano. *
* *
* Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, *
* 2008, 2009, 2010, 2011, 2013, 2014 Free Software Foundation, Inc. *
* Copyright (C) 2014, 2015 Mark Majeres *
* Copyright (C) 2016 Mike Scalora *
* Copyright (C) 2015, 2016 Benno Schulenberg *
* Copyright (C) 2016 Sumedh Pendurkar *
* *
* 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 <stdio.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <errno.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
#ifndef DISABLE_WRAPPING
static bool prepend_wrap = FALSE;
/* Should we prepend wrapped text to the next line? */
#endif
#ifndef DISABLE_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 attepmted. */
#endif
#ifndef NANO_TINY
/* Toggle the mark. */
void do_mark(void)
{
openfile->mark_set = !openfile->mark_set;
if (openfile->mark_set) {
statusbar(_("Mark Set"));
openfile->mark_begin = openfile->current;
openfile->mark_begin_x = openfile->current_x;
openfile->kind_of_mark = HARDMARK;
} else {
statusbar(_("Mark Unset"));
openfile->mark_begin = NULL;
openfile->mark_begin_x = 0;
refresh_needed = TRUE;
}
}
#endif /* !NANO_TINY */
#if !defined(DISABLE_COLOR) || !defined(DISABLE_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 orig_rows = 0;
#endif
assert(openfile->current != NULL && openfile->current->data != NULL &&
openfile->current_x <= strlen(openfile->current->data));
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);
assert(openfile->current_x < strlen(openfile->current->data));
#ifndef NANO_TINY
update_undo(action);
if (ISSET(SOFTWRAP))
orig_rows = strlenpt(openfile->current->data) / editwincols;
#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);
null_at(&openfile->current->data, openfile->current_x +
line_len - char_len);
#ifndef NANO_TINY
/* Adjust the mark if it is after the cursor on the current line. */
if (openfile->mark_set && openfile->mark_begin == openfile->current &&
openfile->mark_begin_x > openfile->current_x)
openfile->mark_begin_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;
assert(openfile->current_x == strlen(openfile->current->data));
/* 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_set && openfile->mark_begin == joining) {
openfile->mark_begin = openfile->current;
openfile->mark_begin_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
ensure_line_is_visible();
/* If the number of screen rows that a softwrapped line occupies
* has changed, we need a full refresh. */
if (ISSET(SOFTWRAP) && refresh_needed == FALSE)
if ((strlenpt(openfile->current->data) / editwincols) != orig_rows)
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(ISSET(WORD_BOUNDS), FALSE);
/* Set the mark at the start of that word. */
openfile->mark_begin = openfile->current;
openfile->mark_begin_x = openfile->current_x;
openfile->mark_set = TRUE;
/* 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
/* Indent or unindent the current line (or, if the mark is on, all lines
* covered by the mark) len columns, depending on whether len is
* positive or negative. If the TABS_TO_SPACES flag is set, indent or
* unindent by len spaces. Otherwise, indent or unindent by (len /
* tabsize) tabs and (len % tabsize) spaces. */
void do_indent(ssize_t cols)
{
bool indent_changed = FALSE;
/* Whether any indenting or unindenting was done. */
bool unindent = FALSE;
/* Whether we're unindenting text. */
char *line_indent = NULL;
/* The text added to each line in order to indent it. */
size_t line_indent_len = 0;
/* The length of the text added to each line in order to indent
* it. */
filestruct *top, *bot, *f;
size_t top_x, bot_x;
assert(openfile->current != NULL && openfile->current->data != NULL);
/* If cols is zero, get out. */
if (cols == 0)
return;
/* If cols is negative, make it positive and set unindent to TRUE. */
if (cols < 0) {
cols = -cols;
unindent = TRUE;
/* Otherwise, we're indenting, in which case the file will always be
* modified, so set indent_changed to TRUE. */
} else
indent_changed = TRUE;
/* If the mark is on, use all lines covered by the mark. */
if (openfile->mark_set)
mark_order((const filestruct **)&top, &top_x,
(const filestruct **)&bot, &bot_x, NULL);
/* Otherwise, use the current line. */
else {
top = openfile->current;
bot = top;
}
if (!unindent) {
/* Set up the text we'll be using as indentation. */
line_indent = charalloc(cols + 1);
if (ISSET(TABS_TO_SPACES)) {
/* Set the indentation to cols spaces. */
charset(line_indent, ' ', cols);
line_indent_len = cols;
} else {
/* Set the indentation to (cols / tabsize) tabs and (cols %
* tabsize) spaces. */
size_t num_tabs = cols / tabsize;
size_t num_spaces = cols % tabsize;
charset(line_indent, '\t', num_tabs);
charset(line_indent + num_tabs, ' ', num_spaces);
line_indent_len = num_tabs + num_spaces;
}
line_indent[line_indent_len] = '\0';
}
/* Go through each line of the text. */
for (f = top; f != bot->next; f = f->next) {
size_t line_len = strlen(f->data);
size_t indent_len = indent_length(f->data);
if (!unindent) {
/* If we're indenting, add the characters in line_indent to
* the beginning of the non-whitespace text of this line. */
f->data = charealloc(f->data, line_len + line_indent_len + 1);
charmove(&f->data[indent_len + line_indent_len],
&f->data[indent_len], line_len - indent_len + 1);
strncpy(f->data + indent_len, line_indent, line_indent_len);
openfile->totsize += line_indent_len;
/* Keep track of the change in the current line. */
if (openfile->mark_set && f == openfile->mark_begin &&
openfile->mark_begin_x >= indent_len)
openfile->mark_begin_x += line_indent_len;
if (f == openfile->current && openfile->current_x >= indent_len)
openfile->current_x += line_indent_len;
/* If the NO_NEWLINES flag isn't set, and this is the
* magicline, add a new magicline. */
if (!ISSET(NO_NEWLINES) && f == openfile->filebot)
new_magicline();
} else {
size_t indent_col = strnlenpt(f->data, indent_len);
/* The length in columns of the indentation on this line. */
if (cols <= indent_col) {
size_t indent_new = actual_x(f->data, indent_col - cols);
/* The length of the indentation remaining on
* this line after we unindent. */
size_t indent_shift = indent_len - indent_new;
/* The change in the indentation on this line
* after we unindent. */
/* If we're unindenting, and there's at least cols
* columns' worth of indentation at the beginning of the
* non-whitespace text of this line, remove it. */
charmove(&f->data[indent_new], &f->data[indent_len],
line_len - indent_shift - indent_new + 1);
null_at(&f->data, line_len - indent_shift + 1);
openfile->totsize -= indent_shift;
/* Keep track of the change in the current line. */
if (openfile->mark_set && f == openfile->mark_begin &&
openfile->mark_begin_x > indent_new) {
if (openfile->mark_begin_x <= indent_len)
openfile->mark_begin_x = indent_new;
else
openfile->mark_begin_x -= indent_shift;
}
if (f == openfile->current &&
openfile->current_x > indent_new) {
if (openfile->current_x <= indent_len)
openfile->current_x = indent_new;
else
openfile->current_x -= indent_shift;
}
/* We've unindented, so the indentation changed. */
indent_changed = TRUE;
}
}
}
if (!unindent)
/* Clean up. */
free(line_indent);
if (indent_changed) {
/* Throw away the undo stack, to prevent making mistakes when
* the user tries to undo something in the reindented text. */
discard_until(NULL, openfile);
/* Mark the file as modified. */
set_modified();
/* Update the screen. */
refresh_needed = TRUE;
}
}
/* Indent the current line, or all lines covered by the mark if the mark
* is on, tabsize columns. */
void do_indent_void(void)
{
do_indent(tabsize);
}
/* Unindent the current line, or all lines covered by the mark if the
* mark is on, tabsize columns. */
void do_unindent(void)
{
do_indent(-tabsize);
}
#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
/* Comment or uncomment the current line or the marked lines. */
void do_comment()
{
const char *comment_seq = "#";
undo_type action = UNCOMMENT;
filestruct *top, *bot, *f;
size_t top_x, bot_x;
bool empty, all_empty = TRUE;
assert(openfile->current != NULL && openfile->current->data != NULL);
#ifndef DISABLE_COLOR
if (openfile->syntax && openfile->syntax->comment)
comment_seq = openfile->syntax->comment;
/* Does the syntax not allow comments? */
if (strlen(comment_seq) == 0) {
statusbar(_("Commenting is not supported for this file type"));
return;
}
#endif
/* Determine which lines to work on. */
if (openfile->mark_set)
mark_order((const filestruct **)&top, &top_x,
(const filestruct **)&bot, &bot_x, NULL);
else {
top = openfile->current;
bot = top;
}
/* 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 (f = top; f != bot->next; f = f->next) {
empty = white_string(f->data);
/* If this line is not blank and not commented, we comment all. */
if (!empty && !comment_line(PREFLIGHT, f, 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);
/* Process the selected line or lines. */
for (f = top; f != bot->next; f = f->next) {
/* Comment/uncomment a line, and add undo data when line changed. */
if (comment_line(action, f, comment_seq))
update_comment_undo(f->lineno);
}
set_modified();
refresh_needed = TRUE;
}
/* 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 *f, 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(f->data);
if (!ISSET(NO_NEWLINES) && f == openfile->filebot)
return FALSE;
if (action == COMMENT) {
/* Make room for the comment sequence(s), move the text right and
* copy them in. */
f->data = charealloc(f->data, line_len + pre_len + post_len + 1);
charmove(&f->data[pre_len], f->data, line_len);
charmove(f->data, comment_seq, pre_len);
if (post_len)
charmove(&f->data[pre_len + line_len], post_seq, post_len);
f->data[pre_len + line_len + post_len] = '\0';
openfile->totsize += pre_len + post_len;
/* If needed, adjust the position of the mark and of the cursor. */
if (openfile->mark_set && f == openfile->mark_begin)
openfile->mark_begin_x += pre_len;
if (f == openfile->current) {
openfile->current_x += pre_len;
openfile->placewewant = xplustabs();
}
return TRUE;
}
/* If the line is commented, report it as uncommentable, or uncomment it. */
if (strncmp(f->data, comment_seq, pre_len) == 0 && (post_len == 0 ||
strcmp(&f->data[line_len - post_len], post_seq) == 0)) {
if (action == PREFLIGHT)
return TRUE;
/* Erase the comment prefix by moving the non-comment part. */
charmove(f->data, &f->data[pre_len], line_len - pre_len);
/* Truncate the postfix if there was one. */
f->data[line_len - pre_len - post_len] = '\0';
openfile->totsize -= pre_len + post_len;
/* If needed, adjust the position of the mark and then the cursor. */
if (openfile->mark_set && f == openfile->mark_begin) {
if (openfile->mark_begin_x < pre_len)
openfile->mark_begin_x = 0;
else
openfile->mark_begin_x -= pre_len;
}
if (f == openfile->current) {
if (openfile->current_x < pre_len)
openfile->current_x = 0;
else
openfile->current_x -= pre_len;
openfile->placewewant = xplustabs();
}
return TRUE;
}
return FALSE;
}
/* 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)
{
/* If we cut the magicline, we may as well not crash. :/ */
if (!u->cutbuffer)
return;
filestruct *oldcutbuffer = cutbuffer, *oldcutbottom = cutbottom;
cutbuffer = cutbottom = NULL;
goto_line_posx(u->lineno, u->begin);
openfile->mark_set = TRUE;
openfile->mark_begin = fsfromline(u->mark_begin_lineno);
openfile->mark_begin_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, *t = NULL;
char *data, *undidmsg = NULL;
if (!u) {
statusbar(_("Nothing in undo buffer!"));
return;
}
f = fsfromline(u->mark_begin_lineno);
if (!f)
return;
#ifdef DEBUG
fprintf(stderr, " >> Undoing a type %d...\n", u->type);
fprintf(stderr, " >> Data we're about to undo = \"%s\"\n", f->data);
#endif
openfile->current_x = u->begin;
switch (u->type) {
case ADD:
/* TRANSLATORS: Eight of the next nine strings describe actions
* that are undone or redone. It are all nouns, not verbs. */
undidmsg = _("text add");
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 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;
#ifndef DISABLE_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;
f = openfile->current;
case SPLIT_BEGIN:
undidmsg = _("text add");
break;
#endif
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);
goto_line_posx(u->lineno, u->begin);
break;
case CUT_EOF:
case CUT:
undidmsg = _("text cut");
undo_cut(u);
f = fsfromline(u->lineno);
break;
case PASTE:
undidmsg = _("text uncut");
undo_paste(u);
f = fsfromline(u->mark_begin_lineno);
break;
case ENTER:
if (f->next == NULL) {
statusline(ALERT, _("Internal error: line is missing. "
"Please save your work."));
break;
}
undidmsg = _("line break");
f->data = charealloc(f->data, strlen(f->data) +
strlen(&f->next->data[u->mark_begin_x]) + 1);
strcat(f->data, &f->next->data[u->mark_begin_x]);
unlink_node(f->next);
goto_line_posx(u->lineno, u->begin);
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
case INSERT:
undidmsg = _("text insert");
filestruct *oldcutbuffer = cutbuffer, *oldcutbottom = cutbottom;
cutbuffer = NULL;
cutbottom = NULL;
/* Instead of a line number, u->mark_begin_lineno contains the number
* of lines of the inserted segment, because the file was partitioned
* when update_undo() was called; so, calculate the end-line number. */
openfile->mark_begin = fsfromline(u->lineno + u->mark_begin_lineno - 1);
openfile->mark_begin_x = u->mark_begin_x;
openfile->mark_set = TRUE;
goto_line_posx(u->lineno, u->begin);
cut_marked(NULL);
free_filestruct(u->cutbuffer);
u->cutbuffer = cutbuffer;
u->cutbottom = cutbottom;
cutbuffer = oldcutbuffer;
cutbottom = oldcutbottom;
openfile->mark_set = FALSE;
break;
case REPLACE:
undidmsg = _("text replace");
goto_line_posx(u->lineno, u->begin);
data = u->strdata;
u->strdata = f->data;
f->data = data;
break;
default:
statusline(ALERT, _("Internal error: unknown type. "
"Please save your work."));
break;
}
if (undidmsg && !pletion_line)
statusline(HUSH, _("Undid action (%s)"), undidmsg);
renumber(f);
openfile->current_undo = openfile->current_undo->next;
openfile->last_action = OTHER;
openfile->mark_set = FALSE;
openfile->placewewant = xplustabs();
openfile->totsize = u->wassize;
set_modified();
}
/* Redo the last thing(s) we undid. */
void do_redo(void)
{
filestruct *f;
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, _("Internal error: cannot set up redo. "
"Please save your work."));
return;
}
f = fsfromline(u->type == INSERT ? 1 : u->mark_begin_lineno);
if (!f)
return;
#ifdef DEBUG
fprintf(stderr, " >> Redo running for type %d\n", u->type);
fprintf(stderr, " >> Data we're about to redo = \"%s\"\n", f->data);
#endif
switch (u->type) {
case ADD:
redidmsg = _("text add");
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 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 ENTER:
redidmsg = _("line break");
filestruct *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;
#ifndef DISABLE_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 JOIN:
if (f->next == NULL) {
statusline(ALERT, _("Internal error: line is missing. "
"Please save your work."));
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 CUT_EOF:
case CUT:
redidmsg = _("text cut");
redo_cut(u);
break;
case PASTE:
redidmsg = _("text uncut");
redo_paste(u);
break;
case REPLACE:
redidmsg = _("text replace");
data = u->strdata;
u->strdata = f->data;
f->data = data;
goto_line_posx(u->lineno, u->begin);
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;
#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, _("Internal error: unknown type. "
"Please save your work."));
break;
}
if (redidmsg)
statusline(HUSH, _("Redid action (%s)"), redidmsg);
openfile->current_undo = u;
openfile->last_action = OTHER;
openfile->mark_set = FALSE;
openfile->placewewant = xplustabs();
openfile->totsize = u->newsize;
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;
assert(openfile->current != NULL && openfile->current->data != NULL);
#ifndef NANO_TINY
add_undo(ENTER);
if (ISSET(AUTOINDENT)) {
extra = indent_length(openfile->current->data);
/* If we are breaking the line in the indentation, limit the new
* indentation to the current x position. */
if (extra > openfile->current_x)
extra = openfile->current_x;
}
#endif
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 current line to the new one. */
strncpy(newnode->data, openfile->current->data, extra);
openfile->totsize += extra;
}
#endif
null_at(&openfile->current->data, openfile->current_x);
#ifndef NANO_TINY
/* Adjust the mark if it was on the current line after the cursor. */
if (openfile->mark_set && openfile->current == openfile->mark_begin &&
openfile->current_x < openfile->mark_begin_x) {
openfile->mark_begin = newnode;
openfile->mark_begin_x += extra - openfile->current_x;
}
#endif
splice_node(openfile->current, newnode);
renumber(newnode);
openfile->current = newnode;
openfile->current_x = extra;
openfile->placewewant = xplustabs();
openfile->totsize++;
set_modified();
#ifndef NANO_TINY
update_undo(ENTER);
#endif
refresh_needed = TRUE;
}
#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");
}
/* Execute command in a shell. Return TRUE on success. */
bool execute_command(const char *command)
{
int fd[2];
FILE *f;
char *shellenv;
struct sigaction oldaction, newaction;
/* Original and temporary handlers for SIGINT. */
bool sig_failed = FALSE;
/* Did sigaction() fail without changing the signal handlers? */
/* Make our pipes. */
if (pipe(fd) == -1) {
statusbar(_("Could not create pipe"));
return FALSE;
}
/* Check $SHELL for the shell to use. If it isn't set, use /bin/sh.
* Note that $SHELL should contain only a path, with no arguments. */
shellenv = getenv("SHELL");
if (shellenv == NULL)
shellenv = (char *) "/bin/sh";
/* Fork a child. */
if ((pid = fork()) == 0) {
close(fd[0]);
dup2(fd[1], fileno(stdout));
dup2(fd[1], fileno(stderr));
/* If execl() returns at all, there was an error. */
execl(shellenv, tail(shellenv), "-c", command, NULL);
exit(0);
}
/* Continue as parent. */
close(fd[1]);
if (pid == -1) {
close(fd[0]);
statusbar(_("Could not fork"));
return FALSE;
}
/* Before we start reading the forked command's output, we set
* things up so that Ctrl-C will cancel the new process. */
/* Enable interpretation of the special control keys so that we get
* SIGINT when Ctrl-C is pressed. */
enable_signals();
if (sigaction(SIGINT, NULL, &newaction) == -1) {
sig_failed = TRUE;
nperror("sigaction");
} else {
newaction.sa_handler = cancel_command;
if (sigaction(SIGINT, &newaction, &oldaction) == -1) {
sig_failed = TRUE;
nperror("sigaction");
}
}
/* Note that now oldaction is the previous SIGINT signal handler,
* to be restored later. */
f = fdopen(fd[0], "rb");
if (f == NULL)
nperror("fdopen");
read_file(f, 0, "stdin", TRUE, FALSE);
if (wait(NULL) == -1)
nperror("wait");
if (!sig_failed && sigaction(SIGINT, &oldaction, NULL) == -1)
nperror("sigaction");
/* Restore the terminal to its previous state. In the process,
* disable interpretation of the special control keys so that we can
* use Ctrl-C for other things. */
terminal_init();
return TRUE;
}
/* Discard undo items that are newer than the given one, or all if NULL. */
void discard_until(const undo *thisitem, openfilestruct *thefile)
{
undo *dropit = thefile->undotop;
undo_group *group;
while (dropit != NULL && dropit != thisitem) {
thefile->undotop = dropit->next;
free(dropit->strdata);
free_filestruct(dropit->cutbuffer);
#ifdef ENABLE_COMMENT
group = dropit->grouping;
while (group != NULL) {
undo_group *next = group->next;
free(group);
group = next;
}
#endif
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;
}
/* Add a new undo struct 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);
#ifdef DEBUG
fprintf(stderr, " >> Adding an undo...\n");
#endif
/* Allocate and initialize a new undo type. */
u = (undo *) nmalloc(sizeof(undo));
u->type = action;
#ifndef DISABLE_WRAPPING
if (u->type == SPLIT_BEGIN) {
/* Some action, most likely an ADD, was performed that invoked
* do_wrap(). Rearrange the undo order so that this previous
* action is after the SPLIT_BEGIN undo. */
u->next = openfile->undotop->next;
openfile->undotop->next = u;
} else
#endif
{
u->next = openfile->undotop;
openfile->undotop = u;
openfile->current_undo = u;
}
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;
switch (u->type) {
/* We need to start copying data into the undo buffer
* or we won't be able to restore it later. */
case ADD:
u->wassize--;
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:
if (openfile->current->data[openfile->current_x] != '\0') {
char *char_buf = charalloc(mb_cur_max() + 1);
int char_len = parse_mbchar(&openfile->current->data[u->begin],
char_buf, NULL);
null_at(&char_buf, char_len);
u->strdata = char_buf;
if (u->type == BACK)
u->mark_begin_x += char_len;
break;
}
/* Else purposely fall into the line-joining code. */
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;
#ifndef DISABLE_WRAPPING
case SPLIT_BEGIN:
action = openfile->undotop->type;
break;
case SPLIT_END:
break;
#endif
case INSERT:
break;
case REPLACE:
u->strdata = mallocstrcpy(NULL, openfile->current->data);
break;
case CUT_EOF:
cutbuffer_reset();
break;
case CUT:
cutbuffer_reset();
if (openfile->mark_set) {
u->mark_begin_lineno = openfile->mark_begin->lineno;
u->mark_begin_x = openfile->mark_begin_x;
u->xflags = MARK_WAS_SET;
} else if (!ISSET(CUT_TO_END)) {
/* 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 ENTER:
break;
#ifdef ENABLE_COMMENT
case COMMENT:
case UNCOMMENT:
break;
#endif
default:
statusline(ALERT, _("Internal error: unknown type. "
"Please save your work."));
break;
}
#ifdef DEBUG
fprintf(stderr, " >> openfile->current->data = \"%s\", current_x = %lu, u->begin = %lu, type = %d\n",
openfile->current->data, (unsigned long)openfile->current_x, (unsigned long)u->begin, action);
#endif
openfile->last_action = action;
}
#ifdef ENABLE_COMMENT
/* Update a comment undo item. This should be called once for each line
* affected by the comment/uncomment feature. */
void update_comment_undo(ssize_t lineno)
{
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)
u->grouping->bottom_line++;
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;
}
/* Store the file size after the change, to be used when redoing. */
u->newsize = openfile->totsize;
}
#endif /* ENABLE_COMMENT */
/* Update an undo item, or determine whether a new one is really needed
* and bounce the data to add_undo instead. The latter functionality
* just feels gimmicky and may just be more hassle than it's worth,
* so it should be axed if needed. */
void update_undo(undo_type action)
{
undo *u;
#ifdef DEBUG
fprintf(stderr, " >> Updating... action = %d, openfile->last_action = %d, openfile->current->lineno = %ld",
action, openfile->last_action, (long)openfile->current->lineno);
if (openfile->current_undo)
fprintf(stderr, ", openfile->current_undo->lineno = %ld\n", (long)openfile->current_undo->lineno);
else
fprintf(stderr, "\n");
#endif
/* Change to an add if we're not using the same undo struct
* that we should be using. */
if (action != openfile->last_action ||
(action != ENTER && action != CUT && action != INSERT &&
openfile->current->lineno != openfile->current_undo->lineno)) {
add_undo(action);
return;
}
assert(openfile->undotop != NULL);
u = openfile->undotop;
u->newsize = openfile->totsize;
switch (u->type) {
case ADD: {
#ifdef DEBUG
fprintf(stderr, " >> openfile->current->data = \"%s\", current_x = %lu, u->begin = %lu\n",
openfile->current->data, (unsigned long)openfile->current_x, (unsigned long)u->begin);
#endif
char *char_buf = charalloc(mb_cur_max());
int 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);
#ifdef DEBUG
fprintf(stderr, " >> current undo data is \"%s\"\n", u->strdata);
#endif
u->mark_begin_lineno = openfile->current->lineno;
u->mark_begin_x = openfile->current_x;
break;
}
case BACK:
case DEL: {
char *char_buf = charalloc(mb_cur_max());
int 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;
}
#ifdef DEBUG
fprintf(stderr, " >> current undo data is \"%s\"\nu->begin = %lu\n", u->strdata, (unsigned long)u->begin);
#endif
break;
}
case CUT_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) {
size_t x_loc = u->begin;
u->begin = u->mark_begin_x;
u->mark_begin_x = x_loc;
ssize_t line = u->lineno;
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_TO_END) || u->type == CUT_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 REPLACE:
case PASTE:
u->begin = openfile->current_x;
u->lineno = openfile->current->lineno;
break;
case INSERT:
/* Store the number of lines (plus one) of the insertion. */
u->mark_begin_lineno = openfile->current->lineno;
/* When the insertion contains no newline, store the adjusted
* x position; otherwise, store the length of the last line. */
if (openfile->fileage == openfile->filebot)
u->mark_begin_x = openfile->current_x;
else
u->mark_begin_x = strlen(openfile->filebot->data);
break;
case ENTER:
u->strdata = mallocstrcpy(NULL, openfile->current->data);
u->mark_begin_x = openfile->current_x;
break;
#ifndef DISABLE_WRAPPING
case SPLIT_BEGIN:
case SPLIT_END:
#endif
case JOIN:
/* These cases are handled by the earlier check for a new line and action. */
break;
default:
statusline(ALERT, _("Internal error: unknown type. "
"Please save your work."));
break;
}
#ifdef DEBUG
fprintf(stderr, " >> Done in update_undo (type was %d)\n", action);
#endif
}
#endif /* !NANO_TINY */
#ifndef DISABLE_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;
/* The length of the line we wrap. */
ssize_t wrap_loc;
/* The index of line->data where we wrap. */
const char *after_break;
/* The text after the wrap point. */
size_t after_break_len;
/* The length of after_break. */
const char *next_line = NULL;
/* The next line, minus indentation. */
size_t next_line_len = 0;
/* The length of next_line. */
/* 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! */
assert(line != NULL && line->data != NULL);
/* Save the length of the line. */
line_len = strlen(line->data);
/* Find the last blank where we can break the line. */
wrap_loc = break_line(line->data, fill
#ifndef DISABLE_HELP
, FALSE
#endif
);
/* 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
size_t old_x = openfile->current_x;
filestruct * oldLine = openfile->current;
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. */
/* after_break is the text that will be wrapped to the next line. */
after_break = line->data + wrap_loc;
after_break_len = line_len - wrap_loc;
assert(strlen(after_break) == after_break_len);
/* 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 *end = after_break + move_mbleft(after_break,
after_break_len);
/* Go to the end of the line. */
openfile->current_x = line_len;
/* If after_break doesn't end in a blank, make sure it ends in a
* space. */
if (!is_blank_mbchar(end) && !ISSET(JUSTIFY_TRIM)) {
#ifndef NANO_TINY
add_undo(ADD);
#endif
line_len++;
line->data = charealloc(line->data, line_len + 1);
line->data[line_len - 1] = ' ';
line->data[line_len] = '\0';
after_break = line->data + wrap_loc;
after_break_len++;
openfile->totsize++;
openfile->current_x++;
#ifndef NANO_TINY
update_undo(ADD);
#endif
}
next_line = line->next->data;
next_line_len = strlen(next_line);
if (after_break_len + next_line_len <= 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();
renumber(line);
}
}
/* Go to the wrap location and split the line there. */
openfile->current_x = wrap_loc;
do_enter();
if (old_x < wrap_loc) {
openfile->current_x = old_x;
openfile->current = oldLine;
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 /* !DISABLE_WRAPPING */
#if !defined(DISABLE_HELP) || !defined(DISABLE_WRAPJUSTIFY)
/* 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 newln is TRUE. */
ssize_t break_line(const char *line, ssize_t goal
#ifndef DISABLE_HELP
, bool newln
#endif
)
{
ssize_t blank_loc = -1;
/* Current tentative return value. Index of the last blank we
* found with short enough display width. */
ssize_t cur_loc = 0;
/* Current index in line. */
size_t cur_pos = 0;
/* Current column position in line. */
int char_len = 0;
/* Length of current character, in bytes. */
assert(line != NULL);
while (*line != '\0' && goal >= cur_pos) {
char_len = parse_mbchar(line, NULL, &cur_pos);
if (is_blank_mbchar(line)
#ifndef DISABLE_HELP
|| (newln && *line == '\n')
#endif
) {
blank_loc = cur_loc;
#ifndef DISABLE_HELP
if (newln && *line == '\n')
break;
#endif
}
line += char_len;
cur_loc += char_len;
}
if (goal >= cur_pos)
/* In fact, the whole line displays shorter than goal. */
return cur_loc;
#ifndef DISABLE_HELP
if (newln && blank_loc <= 0) {
/* If no blank was found, or was found only as the first
* character, force a line break. */
cur_loc -= char_len;
return cur_loc;
}
#endif
if (blank_loc == -1) {
/* No blank was found within the goal width,
* so now try and find a blank beyond it. */
bool found_blank = FALSE;
ssize_t found_blank_loc = 0;
while (*line != '\0') {
char_len = parse_mbchar(line, NULL, NULL);
if (is_blank_mbchar(line)
#ifndef DISABLE_HELP
|| (newln && *line == '\n')
#endif
) {
found_blank = TRUE;
found_blank_loc = cur_loc;
} else if (found_blank)
return found_blank_loc;
line += char_len;
cur_loc += char_len;
}
return -1;
}
/* Move to the last blank after blank_loc, if there is one. */
line -= cur_loc;
line += blank_loc;
char_len = parse_mbchar(line, NULL, NULL);
line += char_len;
while (*line != '\0' && is_blank_mbchar(line)) {
char_len = parse_mbchar(line, NULL, NULL);
line += char_len;
blank_loc += char_len;
}
return blank_loc;
}
#endif /* !DISABLE_HELP || !DISABLE_WRAPJUSTIFY */
#if !defined(NANO_TINY) || !defined(DISABLE_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 *blank_mb;
int blank_mb_len;
assert(line != NULL);
blank_mb = charalloc(mb_cur_max());
while (*line != '\0') {
blank_mb_len = parse_mbchar(line, blank_mb, NULL);
if (!is_blank_mbchar(blank_mb))
break;
line += blank_mb_len;
len += blank_mb_len;
}
free(blank_mb);
return len;
}
#endif /* !NANO_TINY || !DISABLE_JUSTIFY */
#ifndef DISABLE_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
/* These four asserts are assumptions about the input data. */
assert(paragraph != NULL);
assert(paragraph->data != NULL);
assert(skip < strlen(paragraph->data));
assert(!is_blank_mbchar(paragraph->data + skip));
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_set && openfile->mark_begin ==
paragraph && openfile->mark_begin_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_set && openfile->mark_begin ==
paragraph && openfile->mark_begin_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--;
}
}
}
assert(*end == '\0');
*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_set && openfile->mark_begin == paragraph) {
openfile->mark_begin_x -= mark_shift;
if (openfile->mark_begin_x > new_end - new_paragraph_data)
openfile->mark_begin_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.
*
* Note that if !HAVE_REGEX_H then we match concatenated copies of
* quotestr. */
size_t quote_length(const char *line)
{
#ifdef HAVE_REGEX_H
regmatch_t matches;
int rc = regexec(&quotereg, 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;
#else /* !HAVE_REGEX_H */
size_t qdepth = 0;
/* Compute quote depth level. */
while (strncmp(line + qdepth, quotestr, quotelen) == 0)
qdepth += quotelen;
return qdepth;
#endif /* !HAVE_REGEX_H */
}
/* a_line and b_line are lines of text. The quotation part of a_line is
* the first a_quote characters. Check that the quotation part of
* b_line is the same. */
bool quotes_match(const char *a_line, size_t a_quote, const char
*b_line)
{
/* Here is the assumption about a_quote. */
assert(a_quote == quote_length(a_line));
return (a_quote == quote_length(b_line) &&
strncmp(a_line, b_line, a_quote) == 0);
}
/* We assume a_line and b_line have no quote part. Then, we return
* whether b_line could follow a_line in a paragraph. */
bool indents_match(const char *a_line, size_t a_indent, const char
*b_line, size_t b_indent)
{
assert(a_indent == indent_length(a_line));
assert(b_indent == indent_length(b_line));
return (b_indent <= a_indent &&
strncmp(a_line, b_line, b_indent) == 0);
}
/* Is foo the beginning of a paragraph?
*
* A line of text consists of a "quote part", followed by an
* "indentation part", followed by text. The functions quote_length()
* and indent_length() calculate these parts.
*
* A line is "part of a paragraph" if it has a part not in the quote
* part or the indentation.
*
* A line is "the beginning of a paragraph" if it is part of a
* paragraph and
* 1) it is the top line of the file, or
* 2) the line above it is not part of a paragraph, or
* 3) the line above it does not have precisely the same quote
* part, or
* 4) the indentation of this line is not an initial substring of
* the indentation of the previous line, or
* 5) this line has no quote part and some indentation, and
* autoindent isn't turned on.
* The reason for number 5) is that if autoindent isn't turned on,
* then an indented line is expected to start a paragraph, as in
* books. Thus, nano can justify an indented paragraph only if
* autoindent is turned on. */
bool begpar(const filestruct *const foo)
{
size_t quote_len, indent_len, temp_id_len;
if (foo == NULL)
return FALSE;
/* Case 1). */
if (foo == openfile->fileage)
return TRUE;
quote_len = quote_length(foo->data);
indent_len = indent_length(foo->data + quote_len);
/* Not part of a paragraph. */
if (foo->data[quote_len + indent_len] == '\0')
return FALSE;
/* Case 3). */
if (!quotes_match(foo->data, quote_len, foo->prev->data))
return TRUE;
temp_id_len = indent_length(foo->prev->data + quote_len);
/* Case 2) or 5) or 4). */
if (foo->prev->data[quote_len + temp_id_len] == '\0' ||
(quote_len == 0 && indent_len > 0 && !ISSET(AUTOINDENT)) ||
!indents_match(foo->prev->data + quote_len, temp_id_len,
foo->data + quote_len, indent_len))
return TRUE;
return FALSE;
}
/* Is foo inside a paragraph? */
bool inpar(const filestruct *const foo)
{
size_t quote_len;
if (foo == NULL)
return FALSE;
quote_len = quote_length(foo->data);
return (foo->data[quote_len + indent_length(foo->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;
/* Generic loop variable. */
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 old_mark_set = openfile->mark_set;
ssize_t mb_lineno_save = 0;
size_t mark_begin_x_save = 0;
if (old_mark_set) {
mb_lineno_save = openfile->mark_begin->lineno;
mark_begin_x_save = openfile->mark_begin_x;
}
#endif
/* par_len will be one greater than the number of lines between
* current and filebot if filebot is the last line in the
* paragraph. */
assert(par_len > 0 && openfile->current->lineno + par_len <=
openfile->filebot->lineno + 1);
/* 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's filestruct 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's filestruct from
* the justify 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 (old_mark_set &&
openfile->current->lineno == mb_lineno_save) {
openfile->mark_begin = openfile->current;
openfile->mark_begin_x = mark_begin_x_save;
}
#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 (old_mark_set && top->lineno == mb_lineno_save) {
openfile->mark_begin = top;
openfile->mark_begin_x = mark_begin_x_save;
}
#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.
*
* See the comment at begpar() for more about when a line is the
* beginning of 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. */
#ifdef HAVE_REGEX_H
if (quoterc != 0) {
statusline(ALERT, _("Bad quote string %s: %s"), quotestr, quoteerr);
return FALSE;
}
#endif
assert(openfile->current != NULL);
/* 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 (!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))
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. */
assert(quote != NULL && par != NULL);
*quote = quote_len;
*par = par_len;
return TRUE;
}
/* If full_justify is TRUE, justify the entire file. Otherwise, justify
* the current paragraph. */
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;
filestruct *current_save = openfile->current;
size_t current_x_save = openfile->current_x;
size_t totsize_save = openfile->totsize;
#ifndef NANO_TINY
filestruct *mark_begin_save = openfile->mark_begin;
size_t mark_begin_x_save = openfile->mark_begin_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) {
size_t i;
/* Generic loop variable. */
filestruct *curr_first_par_line;
/* The first line of the current paragraph. */
size_t quote_len;
/* Length of the initial quotation of the current
* paragraph. */
size_t indent_len;
/* Length of the initial indentation of the current
* paragraph. */
size_t par_len;
/* Number of lines in the current paragraph. */
ssize_t break_pos;
/* Where we will break lines. */
char *indent_string;
/* The first indentation that doesn't match the initial
* indentation of the current paragraph. This is put at the
* beginning of every line broken off the first justified
* line of the paragraph. Note that this works because a
* paragraph can only contain two indentations at most: the
* initial one, and a different one starting on a line after
* the first. See the comment at begpar() for more about
* when a line is part of a paragraph. */
/* 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(&quote_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;
}
/* Set curr_first_par_line to the first line of the current
* paragraph. */
curr_first_par_line = openfile->current;
/* Initialize indent_string to a blank string. */
indent_string = mallocstrcpy(NULL, "");
/* Find the first indentation in the paragraph that doesn't
* match the indentation of the first line, and save it in
* indent_string. If all the indentations are the same, save
* the indentation of the first line in indent_string. */
{
const filestruct *indent_line = openfile->current;
bool past_first_line = FALSE;
for (i = 0; i < par_len; i++) {
indent_len = quote_len +
indent_length(indent_line->data + quote_len);
if (indent_len != strlen(indent_string)) {
indent_string = mallocstrncpy(indent_string,
indent_line->data, indent_len + 1);
indent_string[indent_len] = '\0';
if (past_first_line)
break;
}
if (indent_line == openfile->current)
past_first_line = TRUE;
indent_line = indent_line->next;
}
}
/* Now tack all the lines of the paragraph together, skipping
* the quoting and indentation on all lines after the first. */
for (i = 0; i < par_len - 1; i++) {
filestruct *next_line = openfile->current->next;
size_t line_len = strlen(openfile->current->data);
size_t next_line_len = strlen(openfile->current->next->data);
indent_len = quote_len +
indent_length(openfile->current->next->data + quote_len);
next_line_len -= indent_len;
openfile->totsize -= indent_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] != ' ') {
line_len++;
openfile->current->data =
charealloc(openfile->current->data, line_len + 1);
openfile->current->data[line_len - 1] = ' ';
openfile->current->data[line_len] = '\0';
openfile->totsize++;
}
openfile->current->data = charealloc(openfile->current->data,
line_len + next_line_len + 1);
strcat(openfile->current->data, next_line->data + indent_len);
#ifndef NANO_TINY
/* If needed, adjust the coordinates of the mark. */
if (openfile->mark_set && openfile->mark_begin == next_line) {
openfile->mark_begin = openfile->current;
openfile->mark_begin_x += line_len - indent_len;
}
#endif
/* Don't destroy edittop! */
if (next_line == openfile->edittop)
openfile->edittop = openfile->current;
unlink_node(next_line);
/* If we've removed the next line, we need to go through
* this line again. */
i--;
par_len--;
openfile->totsize--;
}
/* 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);
indent_len = strlen(indent_string);
/* 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 + indent_len,
fill - strnlenpt(openfile->current->data, indent_len)
#ifndef DISABLE_HELP
, FALSE
#endif
);
/* We can't break the line, or don't need to, so get out. */
if (break_pos == -1 || break_pos + indent_len == line_len)
break;
/* Move forward to the character after the indentation and
* just after the space. */
break_pos += indent_len + 1;
assert(break_pos <= line_len);
/* If this paragraph is non-quoted, and autoindent isn't
* turned on, set the indentation length to zero so that the
* indentation is treated as part of the line. */
if (quote_len == 0 && !ISSET(AUTOINDENT))
indent_len = 0;
/* Insert a new line after the current one. */
splice_node(openfile->current, make_new_node(openfile->current));
/* Copy the text after where we're going to break the
* current line to the next line. */
openfile->current->next->data = charalloc(indent_len + 1 +
line_len - break_pos);
strncpy(openfile->current->next->data, indent_string,
indent_len);
strcpy(openfile->current->next->data + indent_len,
openfile->current->data + break_pos);
par_len++;
openfile->totsize += indent_len + 1;
#ifndef NANO_TINY
/* Adjust the mark coordinates to compensate for the change
* in the current line. */
if (openfile->mark_set &&
openfile->mark_begin == openfile->current &&
openfile->mark_begin_x > break_pos) {
openfile->mark_begin = openfile->current->next;
openfile->mark_begin_x -= break_pos - indent_len;
}
#endif
/* Break the current line. */
if (ISSET(JUSTIFY_TRIM)) {
while (break_pos > 0 &&
is_blank_mbchar(&openfile->current->data[break_pos - 1])) {
break_pos--;
openfile->totsize--;
}
}
null_at(&openfile->current->data, break_pos);
/* Go to the next line. */
par_len--;
openfile->current = openfile->current->next;
}
/* We're done breaking lines, so we don't need indent_string
* anymore. */
free(indent_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(curr_first_par_line);
/* 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;
edit_refresh();
/* Display the shortcut list with UnJustify. */
uncutfunc->desc = unjust_tag;
display_main_list();
/* Now get a keystroke and see if it's unjustify. If not, put back
* the keystroke and return. */
#ifndef NANO_TINY
do {
#endif
statusbar(_("Can now UnJustify!"));
reset_cursor();
curs_set(1);
kbinput = do_input(FALSE);
#ifndef NANO_TINY
} while (kbinput == KEY_WINCH);
#endif
/* If needed, unset the cursor-position suppression flag, so the cursor
* position /will/ be displayed upon a return to the main loop. */
if (ISSET(CONST_UPDATE))
do_cursorpos(TRUE);
func = func_from_key(&kbinput);
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) {
/* Partition the filestruct so that it contains only the
* text of the justified paragraph. */
filepart = partition_filestruct(first_par_line, 0,
last_par_line, filebot_inpar ?
strlen(last_par_line->data) : 0);
/* Throw away the justified paragraph, and replace it with
* the preserved unjustified text. */
free_filestruct(openfile->fileage);
openfile->fileage = jusbuffer;
openfile->filebot = jusbottom;
/* Unpartition the filestruct, to contain the entire text again. */
unpartition_filestruct(&filepart);
/* Renumber, from the beginning of the unjustified part. */
renumber(jusbuffer);
/* Restore the old position, the size, and the mark. */
openfile->edittop = edittop_save;
openfile->current = current_save;
openfile->current_x = current_x_save;
openfile->totsize = totsize_save;
#ifndef NANO_TINY
if (openfile->mark_set) {
openfile->mark_begin = mark_begin_save;
openfile->mark_begin_x = mark_begin_x_save;
}
#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);
#endif
/* Blow away the unjustified text. */
free_filestruct(jusbuffer);
}
/* Mark the buffer for unjustified text as empty. */
jusbuffer = NULL;
blank_statusbar();
/* Display the shortcut list with UnCut. */
uncutfunc->desc = uncut_tag;
display_main_list();
}
/* 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 /* !DISABLE_JUSTIFY */
#ifndef DISABLE_SPELLER
/* A word is misspelled in the file. Let the user replace it. We
* return FALSE if the user cancels. */
bool do_int_spell_fix(const char *word)
{
char *save_search, *exp_word;
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. */
unsigned stash[sizeof(flags) / sizeof(flags[0])];
/* A storage place for the current flag settings. */
#ifndef NANO_TINY
bool old_mark_set = openfile->mark_set;
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 settings of the global flags. */
memcpy(stash, flags, sizeof(flags));
/* Do the spell checking case sensitive, forward, and without regexes. */
SET(CASE_SENSITIVE);
UNSET(BACKWARDS_SEARCH);
UNSET(USE_REGEXP);
/* 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 (old_mark_set) {
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_begin = bot;
openfile->mark_begin_x = bot_x;
}
openfile->mark_set = FALSE;
} 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, TRUE, 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) {
exp_word = display_string(openfile->current->data, xplustabs(),
strlenpt(word), FALSE);
edit_refresh();
spotlight(TRUE, exp_word);
/* Let the user supply a correctly spelled alternative. */
proceed = (do_prompt(FALSE, FALSE, MSPELL, word,
#ifndef DISABLE_HISTORIES
NULL,
#endif
edit_refresh, _("Edit a replacement")) != -1);
spotlight(FALSE, exp_word);
free(exp_word);
/* If a replacement was given, go through all occurrences. */
if (proceed && strcmp(word, answer) != 0) {
#ifndef NANO_TINY
/* Replacements should happen only in the marked region. */
openfile->mark_set = old_mark_set;
#endif
do_replace_loop(word, TRUE, current_save, &current_x_save);
/* TRANSLATORS: Shown after fixing misspellings in one word. */
statusbar(_("Next word..."));
napms(400);
}
}
#ifndef NANO_TINY
if (old_mark_set) {
/* Restore the (compensated) end points of the marked region. */
if (right_side_up) {
openfile->current = openfile->mark_begin;
openfile->current_x = openfile->mark_begin_x;
openfile->mark_begin = top;
openfile->mark_begin_x = top_x;
} else {
openfile->current = top;
openfile->current_x = top_x;
}
openfile->mark_set = TRUE;
} 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;
/* Restore the settings of the global flags. */
memcpy(flags, stash, sizeof(flags));
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]);
/* Process the spelling errors. */
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) {
if (!do_int_spell_fix(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)
do_int_spell_fix(read_buff_word);
free(read_buff);
search_replace_abort();
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;
struct stat spellfileinfo;
time_t timestamp;
pid_t pid_spell;
char *ptr;
static int arglen = 3;
static char **spellargs = NULL;
#ifndef NANO_TINY
bool old_mark_set = openfile->mark_set;
bool added_magicline = FALSE;
/* Whether we added a magicline after filebot. */
filestruct *top, *bot;
size_t top_x, bot_x, was_x, new_x;
bool right_side_up = FALSE;
ssize_t mb_lineno_save = 0;
/* We're going to close the current file, and open the output of
* the alternate spell command. The line that mark_begin points
* to will be freed, so we save the line number and restore it
* afterwards. */
size_t size_of_surrounding = 0;
/* The size of the text outside of a marked region. */
#endif
/* 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;
#ifndef NANO_TINY
if (old_mark_set) {
/* If the mark is on, save the number of the line it starts on,
* and then turn the mark off. */
mb_lineno_save = openfile->mark_begin->lineno;
openfile->mark_set = FALSE;
}
#endif
endwin();
/* Set up an argument list to pass to execvp(). */
if (spellargs == NULL) {
spellargs = (char **)nmalloc(arglen * sizeof(char *));
spellargs[0] = strtok(alt_speller, " ");
while ((ptr = strtok(NULL, " ")) != NULL) {
arglen++;
spellargs = (char **)nrealloc(spellargs, arglen *
sizeof(char *));
spellargs[arglen - 3] = ptr;
}
spellargs[arglen - 1] = NULL;
}
spellargs[arglen - 2] = tempfile_name;
/* Start a new process for the alternate speller. */
if ((pid_spell = fork()) == 0) {
/* Start alternate spell program; we are using $PATH. */
execvp(spellargs[0], spellargs);
/* Should not be reached, if alternate speller is found!!! */
exit(1);
}
/* If we couldn't fork, get out. */
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) {
#ifndef NANO_TINY
/* Turn the mark back on if it was on before. */
openfile->mark_set = old_mark_set;
#endif
return invocation_error(alt_speller);
}
#ifndef NANO_TINY
if (old_mark_set) {
/* Trim the filestruct so that it contains only the marked text. */
mark_order((const filestruct **)&top, &top_x,
(const filestruct **)&bot, &bot_x, &right_side_up);
filepart = partition_filestruct(top, top_x, bot, bot_x);
/* Foresay whether a magicline will be added when the
* spell-checked text is read back in. */
if (!ISSET(NO_NEWLINES))
added_magicline = (openfile->filebot->data[0] != '\0');
/* Compute the size of the text outside of the marked region. */
size_of_surrounding = openfile->totsize - get_totsize(top, bot);
}
#endif
/* Replace the text of the current buffer with the spell-checked text. */
replace_buffer(tempfile_name);
#ifndef NANO_TINY
if (old_mark_set) {
filestruct *top_save = openfile->fileage;
/* If a magicline was added, remove it again. */
if (added_magicline)
remove_magicline();
/* Adjust the end point of the marked region for any change in
* length of the region's last line. */
if (right_side_up)
was_x = current_x_save;
else
was_x = openfile->mark_begin_x;
if (top == bot)
new_x = was_x - bot_x + top_x + strlen(openfile->filebot->data);
else
new_x = strlen(openfile->filebot->data);
if (right_side_up)
current_x_save = new_x;
else
openfile->mark_begin_x = new_x;
/* Unpartition the filestruct so that it contains all the text
* again. Note that we've replaced the marked text originally
* in the partition with the spell-checked marked text in the
* temp file. */
unpartition_filestruct(&filepart);
/* Renumber, starting with the beginning line of the old partition. */
renumber(top_save);
/* Add back the size of the text surrounding the marked region. */
openfile->totsize += size_of_surrounding;
/* Restore the position of the mark, and turn it back on. */
openfile->mark_begin = fsfromline(mb_lineno_save);
openfile->mark_set = TRUE;
}
#endif /* !NANO_TINY */
/* Go back to the old position. */
goto_line_posx(lineno_save, current_x_save);
if (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);
#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;
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;
}
#ifndef NANO_TINY
if (openfile->mark_set)
status = write_marked_file(temp, temp_file, TRUE, OVERWRITE);
else
#endif
status = write_file(temp, temp_file, TRUE, OVERWRITE, FALSE);
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);
/* 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 /* !DISABLE_SPELLER */
#ifndef DISABLE_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, *ptr;
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 int arglen = 3;
static char **lintargs = NULL;
char *lintcopy, *convendptr = 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;
}
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) != TRUE))
return;
}
lintcopy = mallocstrcpy(NULL, openfile->syntax->linter);
/* Create a pipe up front. */
if (pipe(lint_fd) == -1) {
statusbar(_("Could not create pipe"));
return;
}
blank_bottombars();
statusbar(_("Invoking linter, please wait"));
/* Set up an argument list to pass to execvp(). */
if (lintargs == NULL) {
lintargs = (char **)nmalloc(arglen * sizeof(char *));
lintargs[0] = strtok(lintcopy, " ");
while ((ptr = strtok(NULL, " ")) != NULL) {
arglen++;
lintargs = (char **)nrealloc(lintargs, arglen * sizeof(char *));
lintargs[arglen - 3] = ptr;
}
lintargs[arglen - 1] = NULL;
}
lintargs[arglen - 2] = 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) {
#ifdef DEBUG
fprintf(stderr, "text.c:do_linter:%ld bytes (%s)\n", (long)bytesread, read_buff_ptr);
#endif
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]);
#ifdef DEBUG
fprintf(stderr, "text.c:do_lint:Raw output: %s\n", read_buff);
#endif
/* 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're assuming the following formats:
*
* filenameorcategory:line:column:message (e.g. splint)
* filenameorcategory:line:message (e.g. pyflakes)
* filenameorcategory:line,col:message (e.g. pylint)
*
* This could be turned into some scanf() based parser,
* but ugh. */
if ((filename = strtok(read_buff_word, ":")) != NULL) {
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, &convendptr, 10);
if (*convendptr != '\0') {
/* Previous field might still be
* line,col format. */
strtok(linestr, ",");
if ((tmplinecol = strtok(NULL, ",")) != NULL)
tmpcolno = strtol(tmplinecol, NULL, 10);
}
#ifdef DEBUG
fprintf(stderr, "text.c:do_lint:Successful parse! %ld:%ld:%s\n", (long)tmplineno, (long)tmpcolno, message);
#endif
/* 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;
if (tmplint != curlint) {
#ifndef NANO_TINY
struct stat lintfileinfo;
new_lint_loop:
if (stat(curlint->filename, &lintfileinfo) != -1) {
if (openfile->current_stat->st_ino != lintfileinfo.st_ino) {
openfilestruct *tmpof = openfile;
while (tmpof != openfile->next) {
if (tmpof->current_stat->st_ino == lintfileinfo.st_ino)
break;
tmpof = tmpof->next;
}
if (tmpof->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) {
SET(MULTIBUFFER);
open_buffer(curlint->filename, FALSE);
} else {
char *dontwantfile = curlint->filename;
while (curlint != NULL && !strcmp(curlint->filename, dontwantfile))
curlint = curlint->next;
if (curlint == NULL) {
statusbar(_("No more errors in unopened files, cancelling"));
break;
} else
goto new_lint_loop;
}
} else
openfile = tmpof;
}
}
#endif /* !NANO_TINY */
do_gotolinecolumn(curlint->lineno, curlint->colno, FALSE, FALSE);
titlebar(NULL);
edit_refresh();
statusbar(curlint->msg);
bottombars(MLINTER);
}
/* Place and show the cursor to indicate the affected line. */
reset_cursor();
wnoutrefresh(edit);
curs_set(1);
kbinput = get_kbinput(bottomwin);
#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"));
}
}
blank_statusbar();
#ifndef NANO_TINY
free_lints_and_return:
#endif
for (curlint = lints; curlint != NULL;) {
tmplint = curlint;
curlint = curlint->next;
free(tmplint->msg);
free(tmplint->filename);
free(tmplint);
}
}
#ifndef DISABLE_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;
pid_t pid_format;
static int arglen = 3;
static char **formatargs = NULL;
char *temp, *ptr, *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;
}
/* We're not supporting partial formatting, oi vey. */
openfile->mark_set = FALSE;
status = write_file(temp, temp_file, TRUE, OVERWRITE, FALSE);
if (!status) {
statusline(ALERT, _("Error writing temp file: %s"), strerror(errno));
free(temp);
return;
}
blank_bottombars();
statusbar(_("Invoking formatter, please wait"));
/* Set up an argument list to pass to execvp(). */
if (formatargs == NULL) {
formatargs = (char **)nmalloc(arglen * sizeof(char *));
formatargs[0] = strtok(openfile->syntax->formatter, " ");
while ((ptr = strtok(NULL, " ")) != NULL) {
arglen++;
formatargs = (char **)nrealloc(formatargs, arglen * sizeof(char *));
formatargs[arglen - 3] = ptr;
}
formatargs[arglen - 1] = NULL;
}
formatargs[arglen - 2] = 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 (openfile->current_x > strlen(openfile->current->data))
openfile->current_x = strlen(openfile->current->data);
openfile->placewewant = pww_save;
adjust_viewport(STATIONARY);
set_modified();
/* Flush the undo stack, to avoid a mess or crash when
* the user tries to undo things in reformatted lines. */
discard_until(NULL, openfile);
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 /* !DISABLE_SPELLER */
#endif /* !DISABLE_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;
bool old_mark_set = openfile->mark_set;
filestruct *top, *bot;
size_t top_x, bot_x;
/* If the mark is on, partition the filestruct so that it
* contains only the marked text, and turn the mark off. */
if (old_mark_set) {
mark_order((const filestruct **)&top, &top_x,
(const filestruct **)&bot, &bot_x, NULL);
filepart = partition_filestruct(top, top_x, bot, bot_x);
openfile->mark_set = FALSE;
}
/* 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(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 (old_mark_set) {
nlines = openfile->filebot->lineno - openfile->fileage->lineno + 1;
chars = get_totsize(openfile->fileage, openfile->filebot);
/* Unpartition the filestruct so that it contains all the text
* again, and turn the mark back on. */
unpartition_filestruct(&filepart);
openfile->mark_set = TRUE;
} 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: %lu Lines: %ld Chars: %lu"), old_mark_set ?
_("In Selection: ") : "", (unsigned long)words, (long)nlines,
(unsigned long)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"));
reset_cursor();
curs_set(1);
/* Read in all the verbatim characters. */
kbinput = get_verbatim_kbinput(edit, &kbinput_len);
/* If constant cursor position display is on, make sure the current
* cursor position will be properly displayed on the statusbar.
* Otherwise, blank the statusbar. */
if (ISSET(CONST_UPDATE))
do_cursorpos(TRUE);
else {
blank_statusbar();
wnoutrefresh(bottomwin);
}
/* 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 = (char *)nmalloc((len_of_word + 1) * sizeof(char));
/* 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;
int start_of_shard, shard_length = 0;
int i = 0, j = 0;
completion_word *some_word;
#ifndef DISABLE_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. */
blank_statusbar();
wnoutrefresh(bottomwin);
} 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 = (char *)nmalloc((openfile->current_x - start_of_shard + 1) * sizeof(char));
/* 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; 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;
#ifndef DISABLE_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);
#ifndef DISABLE_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 */