312 lines
9.8 KiB
C
312 lines
9.8 KiB
C
/**************************************************************************
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* cut.c *
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* *
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* Copyright (C) 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, *
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* 2008, 2009, 2010, 2011, 2013, 2014 Free Software Foundation, Inc. *
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* This program 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 by *
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* the Free Software Foundation; either version 3, or (at your option) *
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* any later version. *
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* *
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* This program is distributed in the hope that it will be useful, but *
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* WITHOUT ANY WARRANTY; without even the implied warranty of *
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU *
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* 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, write to the Free Software *
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA *
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* 02110-1301, USA. *
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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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#include <stdio.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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move_to_filestruct(&cutbuffer, &cutbottom, openfile->current, 0,
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openfile->current->next, 0);
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else
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move_to_filestruct(&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(void)
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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, NULL);
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move_to_filestruct(&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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assert(openfile->current_x <= data_len);
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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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move_to_filestruct(&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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move_to_filestruct(&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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move_to_filestruct(&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 filestruct into the cutbuffer. If
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* copy_text is TRUE, copy the text back into the filestruct 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(
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#ifndef NANO_TINY
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bool copy_text, bool cut_till_eof
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#else
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void
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#endif
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)
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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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#endif
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assert(openfile->current != NULL && openfile->current->data != NULL);
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/* Empty the cutbuffer when a chain of cuts is broken. */
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if (!keep_cutbuffer) {
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free_filestruct(cutbuffer);
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cutbuffer = NULL;
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#ifdef DEBUG
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fprintf(stderr, "Blew away cutbuffer =)\n");
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#endif
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}
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#ifndef NANO_TINY
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if (copy_text) {
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if (cutbuffer != NULL) {
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/* If the cutbuffer isn't empty, save where it currently
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* ends. This is where we'll add the new text. */
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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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/* Set NO_NEWLINES to TRUE, so that we don't disturb the last
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* line of the file when moving text to the cutbuffer. */
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SET(NO_NEWLINES);
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}
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#endif
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/* Ensure that the text we're going to move into the cutbuffer will
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* be added to the text already there, instead of replacing it. */
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keep_cutbuffer = TRUE;
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#ifndef NANO_TINY
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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_set) {
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/* Move the marked text to the cutbuffer, and turn the mark off. */
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cut_marked();
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openfile->mark_set = FALSE;
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} else if (ISSET(CUT_TO_END))
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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 in the cutbuffer, starting at its saved end if
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* there is one, back into the filestruct. This effectively
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* uncuts the text we just cut without marking the file as
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* modified. */
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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_filestruct(cb_save);
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cb_save->data -= cb_save_len;
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} else
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copy_from_filestruct(cutbuffer);
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/* Set the current place we want to where the text from the
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* cutbuffer ends. */
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openfile->placewewant = xplustabs();
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}
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/* Set NO_NEWLINES back to what it was before, since we're done
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* disturbing the text. */
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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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set_modified();
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refresh_needed = TRUE;
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#ifndef DISABLE_COLOR
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reset_multis(openfile->current, FALSE);
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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 filestruct 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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do_cut_text(FALSE, FALSE);
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update_undo(CUT);
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#else
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do_cut_text();
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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 filestruct into the cutbuffer, and copy it
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* back into the filestruct 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_set = openfile->mark_set;
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/* Remember the current view port and cursor position. */
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ssize_t is_edittop_lineno = openfile->edittop->lineno;
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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_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_set ? NULL : openfile->current);
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if (mark_set) {
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/* Restore the view port and cursor position. */
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openfile->edittop = fsfromline(is_edittop_lineno);
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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_EOF);
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do_cut_text(FALSE, TRUE);
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update_undo(CUT_EOF);
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}
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#endif /* !NANO_TINY */
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/* Copy text from the cutbuffer into the current filestruct. */
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void do_uncut_text(void)
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{
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int was_lineno = openfile->current->lineno;
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assert(openfile->current != NULL && openfile->current->data != NULL);
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/* If the cutbuffer is empty, get out. */
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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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#endif
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/* Add a copy of the text in the cutbuffer to the current filestruct
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* at the current cursor position. */
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copy_from_filestruct(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 (openfile->current->lineno - was_lineno < editwinrows)
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focusing = FALSE;
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/* Set the current place we want to where the text from the
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* cutbuffer ends. */
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openfile->placewewant = xplustabs();
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/* Mark the file as modified. */
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set_modified();
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refresh_needed = TRUE;
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#ifndef DISABLE_COLOR
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reset_multis(openfile->current, FALSE);
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#endif
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#ifdef DEBUG
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dump_filestruct_reverse();
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#endif
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}
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