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