649 lines
16 KiB
C
649 lines
16 KiB
C
/* $NetBSD: selection.c,v 1.9 2005/06/02 09:49:31 lukem Exp $ */
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/*
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* Copyright (c) 2002, 2003, 2004 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Julio M. Merino Vidal.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. The name authors may not be used to endorse or promote products
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* derived from this software without specific prior written
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* permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHORS ``AS IS'' AND ANY EXPRESS
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* OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHORS BE LIABLE FOR ANY
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* DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE
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* GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: selection.c,v 1.9 2005/06/02 09:49:31 lukem Exp $");
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#endif /* not lint */
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#include <sys/ioctl.h>
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#include <sys/time.h>
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#include <sys/types.h>
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#include <sys/tty.h>
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#include <dev/wscons/wsconsio.h>
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#include <ctype.h>
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#include <err.h>
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#include <fcntl.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "pathnames.h"
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#include "wsmoused.h"
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/* ---------------------------------------------------------------------- */
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/*
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* Public interface exported by the `selection' mode.
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*/
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int selection_startup(struct mouse *m);
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int selection_cleanup(void);
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void selection_wsmouse_event(struct wscons_event);
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void selection_wscons_event(struct wscons_event, int);
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void selection_poll_timeout(void);
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struct mode_bootstrap Selection_Mode = {
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"selection",
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selection_startup,
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selection_cleanup,
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selection_wsmouse_event,
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selection_wscons_event,
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selection_poll_timeout
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};
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/* ---------------------------------------------------------------------- */
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/*
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* Structures used in this module only.
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*/
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/* The `selarea' structure is used to describe a selection in the screen.
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It also holds a copy of the selected text. */
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struct selarea {
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size_t sa_x1; /* Start column */
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size_t sa_y1; /* Start row */
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size_t sa_x2; /* End column */
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size_t sa_y2; /* End row */
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size_t sa_startoff; /* Absolute offset of start position */
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size_t sa_endoff; /* Absolute offset of end position */
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size_t sa_buflen; /* Length of selected text */
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char *sa_buf; /* A copy of the selected text */
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};
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/* The `selmouse' structure extends the `mouse' structure adding all fields
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required for this module to work. */
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struct selmouse {
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struct mouse *sm_mouse; /* Pointer to parent structure */
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int sm_ttyfd; /* Active TTY file descriptor */
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size_t sm_x; /* Mouse pointer column */
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size_t sm_y; /* Mouse pointer row */
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size_t sm_max_x; /* Maximun column allowed */
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size_t sm_max_y; /* Maximun row allowed */
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size_t sm_slowdown_x; /* X axis slowdown */
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size_t sm_slowdown_y; /* Y axis slowdown */
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size_t sm_count_x; /* Number of X movements skipped */
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size_t sm_count_y; /* Number of Y movements skipped */
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int sm_visible; /* Whether pointer is visible or not */
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int sm_selecting; /* Whether we are selecting or not */
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int sm_but_select; /* Button number to select an area */
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int sm_but_paste; /* Button number to paste buffer */
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};
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/* ---------------------------------------------------------------------- */
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/*
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* Global variables.
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*/
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static struct selmouse Selmouse;
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static struct selarea Selarea;
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static int Initialized = 0;
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/* ---------------------------------------------------------------------- */
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/*
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* Prototypes for functions private to this module.
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*/
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static void cursor_hide(void);
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static void cursor_show(void);
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static void open_tty(int);
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static void char_invert(size_t, size_t);
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static void *alloc_sel(size_t);
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static char *fill_buf(char *, size_t, size_t, size_t);
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static size_t row_length(size_t);
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static void selarea_copy_text(void);
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static void selarea_start(void);
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static void selarea_end(void);
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static void selarea_calculate(void);
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static void selarea_hide(void);
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static void selarea_show(void);
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static void selarea_paste(void);
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/* ---------------------------------------------------------------------- */
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/* Mode initialization. Reads configuration, checks if the kernel has
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* support for mouse pointer and opens required files. */
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int
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selection_startup(struct mouse *m)
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{
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int i;
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struct winsize ws;
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struct wsdisplay_char ch;
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struct block *conf;
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if (Initialized) {
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log_warnx("selection mode already initialized");
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return 1;
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}
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(void)memset(&Selmouse, 0, sizeof(struct selmouse));
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Selmouse.sm_mouse = m;
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conf = config_get_mode("selection");
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Selmouse.sm_slowdown_x = block_get_propval_int(conf, "slowdown_x", 0);
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Selmouse.sm_slowdown_y = block_get_propval_int(conf, "slowdown_y", 3);
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if (block_get_propval_int(conf, "lefthanded", 0)) {
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Selmouse.sm_but_select = 2;
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Selmouse.sm_but_paste = 0;
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} else {
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Selmouse.sm_but_select = 0;
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Selmouse.sm_but_paste = 2;
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}
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/* Get terminal size */
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if (ioctl(0, TIOCGWINSZ, &ws) < 0) {
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log_warn("cannot get terminal size");
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return 0;
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}
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/* Open current tty */
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(void)ioctl(Selmouse.sm_mouse->m_statfd, WSDISPLAYIO_GETACTIVESCREEN,
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&i);
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Selmouse.sm_ttyfd = -1;
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open_tty(i);
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/* Check if the kernel has character functions */
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ch.row = ch.col = 0;
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if (ioctl(Selmouse.sm_ttyfd, WSDISPLAYIO_GETWSCHAR, &ch) < 0) {
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(void)close(Selmouse.sm_ttyfd);
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log_warn("ioctl(WSDISPLAYIO_GETWSCHAR) failed");
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return 0;
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}
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Selmouse.sm_max_y = ws.ws_row - 1;
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Selmouse.sm_max_x = ws.ws_col - 1;
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Selmouse.sm_y = Selmouse.sm_max_y / 2;
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Selmouse.sm_x = Selmouse.sm_max_x / 2;
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Selmouse.sm_count_y = 0;
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Selmouse.sm_count_x = 0;
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Selmouse.sm_visible = 0;
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Selmouse.sm_selecting = 0;
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Initialized = 1;
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return 1;
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}
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/* ---------------------------------------------------------------------- */
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/* Mode cleanup. */
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int
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selection_cleanup(void)
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{
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cursor_hide();
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if (Selmouse.sm_ttyfd >= 0)
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(void)close(Selmouse.sm_ttyfd);
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return 1;
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}
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/* ---------------------------------------------------------------------- */
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/* Parse wsmouse events. Both motion and button events are handled. The
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* former move the mouse across the screen and the later create a new
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* selection or paste the buffer. */
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void
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selection_wsmouse_event(struct wscons_event evt)
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{
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if (IS_MOTION_EVENT(evt.type)) {
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if (Selmouse.sm_selecting)
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selarea_hide();
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cursor_hide();
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switch (evt.type) {
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case WSCONS_EVENT_MOUSE_DELTA_X:
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if (Selmouse.sm_count_x >= Selmouse.sm_slowdown_x) {
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Selmouse.sm_count_x = 0;
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if (evt.value > 0)
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Selmouse.sm_x++;
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else if (Selmouse.sm_x != 0)
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Selmouse.sm_x--;
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if (Selmouse.sm_x > Selmouse.sm_max_x)
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Selmouse.sm_x = Selmouse.sm_max_x;
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} else
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Selmouse.sm_count_x++;
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break;
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case WSCONS_EVENT_MOUSE_DELTA_Y:
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if (Selmouse.sm_count_y >= Selmouse.sm_slowdown_y) {
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Selmouse.sm_count_y = 0;
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if (evt.value < 0)
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Selmouse.sm_y++;
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else if (Selmouse.sm_y != 0)
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Selmouse.sm_y--;
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if (Selmouse.sm_y > Selmouse.sm_max_y)
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Selmouse.sm_y = Selmouse.sm_max_y;
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} else
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Selmouse.sm_count_y++;
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break;
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case WSCONS_EVENT_MOUSE_DELTA_Z:
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break;
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default:
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log_warnx("unknown event");
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}
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if (Selmouse.sm_selecting)
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selarea_show();
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cursor_show();
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} else if (IS_BUTTON_EVENT(evt.type)) {
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switch (evt.type) {
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case WSCONS_EVENT_MOUSE_UP:
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if (evt.value == Selmouse.sm_but_select) {
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/* End selection */
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selarea_end();
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selarea_hide();
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}
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break;
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case WSCONS_EVENT_MOUSE_DOWN:
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if (evt.value == Selmouse.sm_but_select) {
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/* Start selection */
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selarea_start();
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cursor_hide();
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selarea_show();
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} else if (evt.value == Selmouse.sm_but_paste) {
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/* Paste selection */
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selarea_paste();
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break;
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}
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break;
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default:
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log_warnx("unknown button event");
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}
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}
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}
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/* ---------------------------------------------------------------------- */
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/* Parse wscons status events. */
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void
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selection_wscons_event(struct wscons_event evt, int preclose)
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{
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switch (evt.type) {
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case WSCONS_EVENT_SCREEN_SWITCH:
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if (preclose) {
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if (Selmouse.sm_selecting)
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selarea_hide();
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cursor_hide();
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} else {
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if (!Selmouse.sm_mouse->m_disabled)
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open_tty(evt.value);
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cursor_show();
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if (Selmouse.sm_selecting)
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selarea_show();
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}
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break;
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}
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}
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/* ---------------------------------------------------------------------- */
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/* Device polling has timed out, so we hide the mouse to avoid further
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* console pollution. */
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void
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selection_poll_timeout(void)
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{
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if (!Selmouse.sm_selecting)
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cursor_hide();
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}
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/* ---------------------------------------------------------------------- */
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/* Hides the mouse pointer, if visible. */
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static void
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cursor_hide(void)
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{
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if (Selmouse.sm_visible) {
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char_invert(Selmouse.sm_y, Selmouse.sm_x);
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Selmouse.sm_visible = 0;
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}
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}
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/* ---------------------------------------------------------------------- */
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/* Shows the mouse pointer, if not visible. */
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static void
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cursor_show(void)
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{
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if (!Selmouse.sm_visible) {
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char_invert(Selmouse.sm_y, Selmouse.sm_x);
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Selmouse.sm_visible = 1;
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}
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}
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/* ---------------------------------------------------------------------- */
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/* Opens the specified TTY device, used when switching consoles. */
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static void
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open_tty(int ttyno)
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{
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char buf[20];
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if (Selmouse.sm_ttyfd >= 0)
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(void)close(Selmouse.sm_ttyfd);
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(void)snprintf(buf, sizeof(buf), _PATH_TTYPREFIX "%d", ttyno);
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Selmouse.sm_ttyfd = open(buf, O_RDONLY | O_NONBLOCK);
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if (Selmouse.sm_ttyfd < 0)
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log_warnx("cannot open %s", buf);
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}
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/* ---------------------------------------------------------------------- */
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/* Flips the background and foreground colors of the specified screen
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* position. */
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static void
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char_invert(size_t row, size_t col)
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{
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int t;
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struct wsdisplay_char ch;
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ch.row = row;
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ch.col = col;
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if (ioctl(Selmouse.sm_ttyfd, WSDISPLAYIO_GETWSCHAR, &ch) == -1) {
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log_warn("ioctl(WSDISPLAYIO_GETWSCHAR) failed");
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return;
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}
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t = ch.foreground;
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ch.foreground = ch.background;
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ch.background = t;
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if (ioctl(Selmouse.sm_ttyfd, WSDISPLAYIO_PUTWSCHAR, &ch) == -1)
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log_warn("ioctl(WSDISPLAYIO_PUTWSCHAR) failed");
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}
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/* ---------------------------------------------------------------------- */
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/* Allocates memory for a selection. This function is very simple but is
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* used to get a consistent warning message. */
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static void *
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alloc_sel(size_t len)
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{
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void *ptr;
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ptr = malloc(len);
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if (ptr == NULL)
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log_warn("cannot allocate memory for selection (%lu bytes)",
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(unsigned long)len);
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return ptr;
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}
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/* ---------------------------------------------------------------------- */
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/* Copies a region of a line inside the buffer pointed by `ptr'. */
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static char *
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fill_buf(char *ptr, size_t row, size_t col, size_t end)
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{
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struct wsdisplay_char ch;
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ch.row = row;
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for (ch.col = col; ch.col < end; ch.col++) {
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if (ioctl(Selmouse.sm_ttyfd, WSDISPLAYIO_GETWSCHAR,
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&ch) == -1) {
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log_warn("ioctl(WSDISPLAYIO_GETWSCHAR) failed");
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*ptr++ = ' ';
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} else {
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*ptr++ = ch.letter;
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}
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}
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return ptr;
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}
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/* ---------------------------------------------------------------------- */
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/* Scans the specified line and checks its length. Characters at the end
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* of it which match isspace() are discarded. */
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static size_t
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row_length(size_t row)
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{
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struct wsdisplay_char ch;
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ch.col = Selmouse.sm_max_x;
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ch.row = row;
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do {
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if (ioctl(Selmouse.sm_ttyfd, WSDISPLAYIO_GETWSCHAR, &ch) == -1)
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log_warn("ioctl(WSDISPLAYIO_GETWSCHAR) failed");
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ch.col--;
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} while (isspace((unsigned char)ch.letter) && ch.col >= 0);
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return ch.col + 2;
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}
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/* ---------------------------------------------------------------------- */
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/* Copies all the text selected to the selection buffer. Whitespace at
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* end of lines is trimmed. */
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static void
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selarea_copy_text(void)
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{
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char *ptr, *str;
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size_t l, r;
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ptr = NULL; /* XXXGCC -Wuninitialized */
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if (Selarea.sa_y1 == Selarea.sa_y2) {
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/* Selection is one row */
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l = row_length(Selarea.sa_y1);
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if (Selarea.sa_x1 > l)
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/* Selection is after last character,
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* therefore it is empty */
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str = NULL;
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else {
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if (Selarea.sa_x2 > l)
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Selarea.sa_x2 = l;
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ptr = str =
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alloc_sel(Selarea.sa_x2 - Selarea.sa_x1 + 1);
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if (ptr == NULL)
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return;
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ptr = fill_buf(ptr, Selarea.sa_y1, Selarea.sa_x1,
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Selarea.sa_x2);
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*ptr = '\0';
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}
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} else {
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/* Selection is multiple rows */
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ptr = str =
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alloc_sel(Selarea.sa_endoff - Selarea.sa_startoff + 1);
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if (ptr == NULL)
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return;
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/* Calculate and copy first line */
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l = row_length(Selarea.sa_y1);
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if (Selarea.sa_x1 < l) {
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ptr = fill_buf(ptr, Selarea.sa_y1, Selarea.sa_x1, l);
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*ptr++ = '\r';
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}
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/* Copy mid lines if there are any */
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if ((Selarea.sa_y2 - Selarea.sa_y1) > 1) {
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for (r = Selarea.sa_y1 + 1; r <= Selarea.sa_y2 - 1;
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r++) {
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ptr = fill_buf(ptr, r, 0, row_length(r));
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*ptr++ = '\r';
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}
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}
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/* Calculate and copy end line */
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l = row_length(Selarea.sa_y2);
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if (Selarea.sa_x2 < l)
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l = Selarea.sa_x2;
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ptr = fill_buf(ptr, Selarea.sa_y2, 0, l);
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*ptr = '\0';
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}
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if (Selarea.sa_buf != NULL) {
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free(Selarea.sa_buf);
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Selarea.sa_buf = NULL;
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}
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if (str != NULL) {
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Selarea.sa_buf = str;
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Selarea.sa_buflen = ptr - str;
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}
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}
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/* ---------------------------------------------------------------------- */
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/* Starts a selection. */
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static void
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selarea_start(void)
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{
|
|
|
|
if (Selarea.sa_buf != NULL) {
|
|
free(Selarea.sa_buf);
|
|
Selarea.sa_buf = NULL;
|
|
}
|
|
|
|
Selarea.sa_y1 = Selmouse.sm_y;
|
|
Selarea.sa_x1 = Selmouse.sm_x;
|
|
selarea_calculate();
|
|
Selmouse.sm_selecting = 1;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
|
|
/* Ends a selection. Highlighted text is copied to the buffer. */
|
|
static void
|
|
selarea_end(void)
|
|
{
|
|
size_t i;
|
|
|
|
selarea_calculate();
|
|
|
|
/* Invert sel coordinates if needed */
|
|
if (Selarea.sa_x1 > Selarea.sa_x2) {
|
|
i = Selarea.sa_x2;
|
|
Selarea.sa_x2 = Selarea.sa_x1;
|
|
Selarea.sa_x1 = i;
|
|
}
|
|
if (Selarea.sa_y1 > Selarea.sa_y2) {
|
|
i = Selarea.sa_y2;
|
|
Selarea.sa_y2 = Selarea.sa_y1;
|
|
Selarea.sa_y1 = i;
|
|
}
|
|
|
|
selarea_copy_text();
|
|
Selmouse.sm_selecting = 0;
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
|
|
/* Calculates selection absolute positions in the screen buffer. */
|
|
static void
|
|
selarea_calculate(void)
|
|
{
|
|
size_t i;
|
|
|
|
i = Selmouse.sm_max_x + 1;
|
|
Selarea.sa_y2 = Selmouse.sm_y;
|
|
Selarea.sa_x2 = Selmouse.sm_x;
|
|
Selarea.sa_startoff = Selarea.sa_y1 * i + Selarea.sa_x1;
|
|
Selarea.sa_endoff = Selarea.sa_y2 * i + Selarea.sa_x2;
|
|
|
|
if (Selarea.sa_startoff > Selarea.sa_endoff) {
|
|
i = Selarea.sa_endoff;
|
|
Selarea.sa_endoff = Selarea.sa_startoff;
|
|
Selarea.sa_startoff = i;
|
|
}
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
|
|
/* Hides the highlighted region, returning it to normal colors. */
|
|
static void
|
|
selarea_hide(void)
|
|
{
|
|
size_t i;
|
|
|
|
for (i = Selarea.sa_startoff; i <= Selarea.sa_endoff; i++)
|
|
char_invert(0, i);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
|
|
/* Highlights the selected region. */
|
|
static void
|
|
selarea_show(void)
|
|
{
|
|
size_t i;
|
|
|
|
selarea_calculate();
|
|
for (i = Selarea.sa_startoff; i <= Selarea.sa_endoff; i++)
|
|
char_invert(0, i);
|
|
}
|
|
|
|
/* ---------------------------------------------------------------------- */
|
|
|
|
/* Pastes selected text into the active console. */
|
|
static void
|
|
selarea_paste(void)
|
|
{
|
|
size_t i;
|
|
|
|
if (Selarea.sa_buf == NULL)
|
|
return;
|
|
for (i = 0; i < Selarea.sa_buflen; i++)
|
|
if (ioctl(Selmouse.sm_ttyfd, TIOCSTI,
|
|
&Selarea.sa_buf[i]) == -1)
|
|
log_warn("ioctl(TIOCSTI)");
|
|
}
|