300 lines
9.8 KiB
C
300 lines
9.8 KiB
C
/**************************************************************************
|
|
* cut.c -- This file is part of GNU nano. *
|
|
* *
|
|
* Copyright (C) 1999-2011, 2013-2017 Free Software Foundation, Inc. *
|
|
* Copyright (C) 2014 Mark Majeres *
|
|
* Copyright (C) 2016 Benno Schulenberg *
|
|
* *
|
|
* GNU nano is free software: you can redistribute it and/or modify *
|
|
* it under the terms of the GNU General Public License as published *
|
|
* by the Free Software Foundation, either version 3 of the License, *
|
|
* or (at your option) any later version. *
|
|
* *
|
|
* GNU nano is distributed in the hope that it will be useful, *
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty *
|
|
* of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. *
|
|
* See the GNU General Public License for more details. *
|
|
* *
|
|
* You should have received a copy of the GNU General Public License *
|
|
* along with this program. If not, see http://www.gnu.org/licenses/. *
|
|
* *
|
|
**************************************************************************/
|
|
|
|
#include "proto.h"
|
|
|
|
#include <string.h>
|
|
|
|
static bool keep_cutbuffer = FALSE;
|
|
/* Should we keep the contents of the cutbuffer? */
|
|
|
|
/* Indicate that we should no longer keep the contents of the cutbuffer. */
|
|
void cutbuffer_reset(void)
|
|
{
|
|
keep_cutbuffer = FALSE;
|
|
}
|
|
|
|
/* Return the status of cutbuffer preservation. */
|
|
inline bool keeping_cutbuffer(void)
|
|
{
|
|
return keep_cutbuffer;
|
|
}
|
|
|
|
/* If we aren't on the last line of the file, move all the text of the
|
|
* current line, plus the newline at the end, into the cutbuffer. If we
|
|
* are, move all of the text of the current line into the cutbuffer. In
|
|
* both cases, set the current place we want to the beginning of the
|
|
* current line. */
|
|
void cut_line(void)
|
|
{
|
|
if (openfile->current != openfile->filebot)
|
|
extract_buffer(&cutbuffer, &cutbottom, openfile->current, 0,
|
|
openfile->current->next, 0);
|
|
else
|
|
extract_buffer(&cutbuffer, &cutbottom, openfile->current, 0,
|
|
openfile->current, strlen(openfile->current->data));
|
|
openfile->placewewant = 0;
|
|
}
|
|
|
|
#ifndef NANO_TINY
|
|
/* Move all currently marked text into the cutbuffer, and set the
|
|
* current place we want to where the text used to start. */
|
|
void cut_marked(bool *right_side_up)
|
|
{
|
|
filestruct *top, *bot;
|
|
size_t top_x, bot_x;
|
|
|
|
mark_order((const filestruct **)&top, &top_x,
|
|
(const filestruct **)&bot, &bot_x, right_side_up);
|
|
|
|
extract_buffer(&cutbuffer, &cutbottom, top, top_x, bot, bot_x);
|
|
openfile->placewewant = xplustabs();
|
|
}
|
|
|
|
/* If we aren't at the end of the current line, move all the text from
|
|
* the current cursor position to the end of the current line, not
|
|
* counting the newline at the end, into the cutbuffer. If we are, and
|
|
* we're not on the last line of the file, move the newline at the end
|
|
* into the cutbuffer, and set the current place we want to where the
|
|
* newline used to be. */
|
|
void cut_to_eol(void)
|
|
{
|
|
size_t data_len = strlen(openfile->current->data);
|
|
|
|
if (openfile->current_x < data_len)
|
|
/* If we're not at the end of the line, move all the text from
|
|
* the current position up to it, not counting the newline at
|
|
* the end, into the cutbuffer. */
|
|
extract_buffer(&cutbuffer, &cutbottom, openfile->current,
|
|
openfile->current_x, openfile->current, data_len);
|
|
else if (openfile->current != openfile->filebot) {
|
|
/* If we're at the end of the line, and it isn't the last line
|
|
* of the file, move all the text from the current position up
|
|
* to the beginning of the next line, i.e. the newline at the
|
|
* end, into the cutbuffer. */
|
|
extract_buffer(&cutbuffer, &cutbottom, openfile->current,
|
|
openfile->current_x, openfile->current->next, 0);
|
|
openfile->placewewant = xplustabs();
|
|
}
|
|
}
|
|
|
|
/* Move all the text from the current cursor position to the end of the
|
|
* file into the cutbuffer. */
|
|
void cut_to_eof(void)
|
|
{
|
|
extract_buffer(&cutbuffer, &cutbottom,
|
|
openfile->current, openfile->current_x,
|
|
openfile->filebot, strlen(openfile->filebot->data));
|
|
}
|
|
#endif /* !NANO_TINY */
|
|
|
|
/* Move text from the current buffer into the cutbuffer. If
|
|
* copy_text is TRUE, copy the text back into the buffer afterward.
|
|
* If cut_till_eof is TRUE, move all text from the current cursor
|
|
* position to the end of the file into the cutbuffer. */
|
|
void do_cut_text(bool copy_text, bool cut_till_eof)
|
|
{
|
|
#ifndef NANO_TINY
|
|
filestruct *cb_save = NULL;
|
|
/* The current end of the cutbuffer, before we add text to it. */
|
|
size_t cb_save_len = 0;
|
|
/* The length of the string at the current end of the cutbuffer,
|
|
* before we add text to it. */
|
|
bool old_no_newlines = ISSET(NO_NEWLINES);
|
|
bool right_side_up = TRUE;
|
|
/* There *is* no region, *or* it is marked forward. */
|
|
#endif
|
|
size_t was_totsize = openfile->totsize;
|
|
|
|
/* If a chain of cuts was broken, empty the cutbuffer. */
|
|
if (!keep_cutbuffer) {
|
|
free_filestruct(cutbuffer);
|
|
cutbuffer = NULL;
|
|
/* Indicate that future cuts should add to the cutbuffer. */
|
|
keep_cutbuffer = TRUE;
|
|
}
|
|
|
|
#ifndef NANO_TINY
|
|
if (copy_text) {
|
|
/* If the cutbuffer isn't empty, remember where it currently ends. */
|
|
if (cutbuffer != NULL) {
|
|
cb_save = cutbottom;
|
|
cb_save_len = strlen(cutbottom->data);
|
|
}
|
|
/* Don't add a magicline when moving text to the cutbuffer. */
|
|
SET(NO_NEWLINES);
|
|
}
|
|
|
|
if (cut_till_eof) {
|
|
/* Move all text up to the end of the file into the cutbuffer. */
|
|
cut_to_eof();
|
|
} else if (openfile->mark_set) {
|
|
/* Move the marked text to the cutbuffer, and turn the mark off. */
|
|
cut_marked(&right_side_up);
|
|
openfile->mark_set = FALSE;
|
|
} else if (ISSET(CUT_FROM_CURSOR))
|
|
/* Move all text up to the end of the line into the cutbuffer. */
|
|
cut_to_eol();
|
|
else
|
|
#endif
|
|
/* Move the entire line into the cutbuffer. */
|
|
cut_line();
|
|
|
|
#ifndef NANO_TINY
|
|
if (copy_text) {
|
|
/* Copy the text that is in the cutbuffer (starting at its saved end,
|
|
* if there is one) back into the current buffer. This effectively
|
|
* uncuts the text we just cut. */
|
|
if (cutbuffer != NULL) {
|
|
if (cb_save != NULL) {
|
|
cb_save->data += cb_save_len;
|
|
copy_from_buffer(cb_save);
|
|
cb_save->data -= cb_save_len;
|
|
} else
|
|
copy_from_buffer(cutbuffer);
|
|
|
|
/* If the copied region was marked forward, put the new desired
|
|
* x position at its end; otherwise, leave it at its beginning. */
|
|
if (right_side_up)
|
|
openfile->placewewant = xplustabs();
|
|
}
|
|
/* Restore the magicline behavior now that we're done fiddling. */
|
|
if (!old_no_newlines)
|
|
UNSET(NO_NEWLINES);
|
|
} else
|
|
#endif /* !NANO_TINY */
|
|
/* Only set the modification flag if actually something was cut. */
|
|
if (openfile->totsize != was_totsize)
|
|
set_modified();
|
|
|
|
refresh_needed = TRUE;
|
|
|
|
#ifdef ENABLE_COLOR
|
|
check_the_multis(openfile->current);
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
dump_filestruct(cutbuffer);
|
|
#endif
|
|
}
|
|
|
|
/* Move text from the current buffer into the cutbuffer. */
|
|
void do_cut_text_void(void)
|
|
{
|
|
#ifndef NANO_TINY
|
|
add_undo(CUT);
|
|
#endif
|
|
do_cut_text(FALSE, FALSE);
|
|
#ifndef NANO_TINY
|
|
update_undo(CUT);
|
|
#endif
|
|
}
|
|
|
|
#ifndef NANO_TINY
|
|
/* Move text from the current buffer into the cutbuffer, and copy it
|
|
* back into the buffer afterward. If the mark is set or the cursor
|
|
* was moved, blow away previous contents of the cutbuffer. */
|
|
void do_copy_text(void)
|
|
{
|
|
static struct filestruct *next_contiguous_line = NULL;
|
|
bool mark_set = openfile->mark_set;
|
|
|
|
/* Remember the current viewport and cursor position. */
|
|
ssize_t is_edittop_lineno = openfile->edittop->lineno;
|
|
size_t is_firstcolumn = openfile->firstcolumn;
|
|
ssize_t is_current_lineno = openfile->current->lineno;
|
|
size_t is_current_x = openfile->current_x;
|
|
|
|
if (mark_set || openfile->current != next_contiguous_line)
|
|
cutbuffer_reset();
|
|
|
|
do_cut_text(TRUE, FALSE);
|
|
|
|
/* If the mark was set, blow away the cutbuffer on the next copy. */
|
|
next_contiguous_line = (mark_set ? NULL : openfile->current);
|
|
|
|
if (mark_set) {
|
|
/* Restore the viewport and cursor position. */
|
|
openfile->edittop = fsfromline(is_edittop_lineno);
|
|
openfile->firstcolumn = is_firstcolumn;
|
|
openfile->current = fsfromline(is_current_lineno);
|
|
openfile->current_x = is_current_x;
|
|
}
|
|
}
|
|
|
|
/* Cut from the current cursor position to the end of the file. */
|
|
void do_cut_till_eof(void)
|
|
{
|
|
add_undo(CUT_TO_EOF);
|
|
do_cut_text(FALSE, TRUE);
|
|
update_undo(CUT_TO_EOF);
|
|
}
|
|
#endif /* !NANO_TINY */
|
|
|
|
/* Copy text from the cutbuffer into the current buffer. */
|
|
void do_uncut_text(void)
|
|
{
|
|
ssize_t was_lineno = openfile->current->lineno;
|
|
/* The line number where we started the paste. */
|
|
size_t was_leftedge = 0;
|
|
/* The leftedge where we started the paste. */
|
|
|
|
/* If the cutbuffer is empty, there is nothing to do. */
|
|
if (cutbuffer == NULL)
|
|
return;
|
|
|
|
#ifndef NANO_TINY
|
|
add_undo(PASTE);
|
|
|
|
if (ISSET(SOFTWRAP))
|
|
was_leftedge = leftedge_for(xplustabs(), openfile->current);
|
|
#endif
|
|
|
|
/* Add a copy of the text in the cutbuffer to the current buffer
|
|
* at the current cursor position. */
|
|
copy_from_buffer(cutbuffer);
|
|
|
|
#ifndef NANO_TINY
|
|
update_undo(PASTE);
|
|
#endif
|
|
|
|
/* If we pasted less than a screenful, don't center the cursor. */
|
|
if (less_than_a_screenful(was_lineno, was_leftedge))
|
|
focusing = FALSE;
|
|
|
|
/* Set the desired x position to where the pasted text ends. */
|
|
openfile->placewewant = xplustabs();
|
|
|
|
/* Mark the file as modified. */
|
|
set_modified();
|
|
|
|
refresh_needed = TRUE;
|
|
|
|
#ifdef ENABLE_COLOR
|
|
check_the_multis(openfile->current);
|
|
#endif
|
|
|
|
#ifdef DEBUG
|
|
dump_filestruct_reverse();
|
|
#endif
|
|
}
|