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/* -*- Mode: C; indent-tabs-mode: t; c-basic-offset: 4; tab-width: 4 -*- */

* GNUPLOT - caca.trm

* This file uses UTF8 encoding and a tab size of 4.

Redistribution and use in source and binary forms, with or without modification,

are permitted provided that the following conditions are met:

1. Redistributions of source code must retain the above copyright notice,

this list of conditions and the following disclaimer.

2. Redistributions in binary form must reproduce the above copyright notice,

this list of conditions and the following disclaimer in the documentation

and/or other materials provided with the distribution.

THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND

ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED

WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE

DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE

FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL

DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR

SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER

CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,

OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE

OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

#ifdef TERM_REGISTER

register_term(caca)

#endif

#ifdef TERM_PROTO

#define CACA_XMAX (80-1)

#define CACA_YMAX (25-1)

TERM_PUBLIC void CACA_options(void);

TERM_PUBLIC void CACA_init(void);

TERM_PUBLIC void CACA_graphics(void);

TERM_PUBLIC void CACA_text(void);

TERM_PUBLIC void CACA_reset(void);

TERM_PUBLIC void CACA_suspend(void);

TERM_PUBLIC void CACA_resume(void);

TERM_PUBLIC void CACA_linetype(int linetype);

TERM_PUBLIC int CACA_make_palette(t_sm_palette *palette);

TERM_PUBLIC void CACA_color(t_colorspec *colorspec);

TERM_PUBLIC void CACA_move(unsigned int x, unsigned int y);

TERM_PUBLIC void CACA_point(unsigned int x, unsigned int y, int point);

TERM_PUBLIC void CACA_vector(unsigned int x, unsigned int y);

TERM_PUBLIC void CACA_layer(t_termlayer layer);

TERM_PUBLIC void CACA_path(int p);

TERM_PUBLIC void CACA_put_text(unsigned int x, unsigned int y, const char *str);

TERM_PUBLIC void CACA_arrow(unsigned int sx, unsigned int sy,

unsigned int ex, unsigned int ey,

int head);

TERM_PUBLIC int CACA_text_angle(float ang);

TERM_PUBLIC void CACA_fillbox(int style, unsigned int x, unsigned int y, unsigned int w, unsigned int h);

#ifdef USE_MOUSE

TERM_PUBLIC int CACA_waitforinput(int);

TERM_PUBLIC void CACA_put_tmptext(int i, const char str[]);

TERM_PUBLIC void CACA_set_ruler(int, int);

TERM_PUBLIC void CACA_set_cursor(int, int, int);

#endif

TERM_PUBLIC void CACA_filled_polygon(int points, gpiPoint *corners);

TERM_PUBLIC void CACA_image(unsigned int M, unsigned int N, coordval *image,

gpiPoint *corner, t_imagecolor color_mode);

TERM_PUBLIC void CACA_enhanced_put_text(unsigned int x, unsigned int y, const char str[]);

TERM_PUBLIC void CACA_enhanced_open(char * fontname, double fontsize,

double base, TBOOLEAN widthflag, TBOOLEAN showflag, int overprint);

TERM_PUBLIC void CACA_enhanced_flush(void);

TERM_PUBLIC void CACA_hypertext(int type, const char *text);

TERM_PUBLIC void CACA_boxed_text(unsigned int x, unsigned int y, int option);

TERM_PUBLIC void CACA_modify_plots(unsigned int operations, int plotno);

#endif /* TERM_PROTO */

/* This is a new section for public interfaces. */

#if defined(TERM_PUBLIC_PROTO) || defined (TERM_BODY)

typedef enum CACA_result { CACA_quit, CACA_loop, CACA_endpause } CACA_result;

extern CACA_result CACA_process_events(void);

extern TBOOLEAN CACA_window_opened(void);

#endif /* TERM_PUBLIC_PROTO */

#ifdef TERM_BODY

#include <caca.h>

#include <wchar.h>

#include <signal.h>

#ifdef _WIN32

# ifndef _WIN32_WINNT

# define _WIN32_WINNT 0x0501

# endif

# ifndef WIN32_LEAN_AND_MEAN

# define WIN32_LEAN_AND_MEAN

# endif

# include <windows.h>

#endif

#ifdef HAVE_SYS_SELECT_H

# include <sys/select.h>

#endif

/* Internal Functions */

static void CACA_update_options(void); /* update the term_options string */

static void CACA_refresh(void); /* redraw the screen */

static void CACA_check_resize(void); /* test if the screen size changed */

static void CACA_init_angles(void); /* init the array used for rotated text */

static void CACA_close_display(void);

static void CACA_add_path_point(int x, int y); /* add a new point to current path */

static void CACA_init_display(void);

#ifdef USE_MOUSE

static void CACA_print_status(void); /* draw the status line */

static int CACA_translate_key(int key); /* map libcaca key codes to gnuplot's */

static unsigned long CACA_event_time(void); /* get the event time */

static void CACA_discard_events(void); /* discard pending caca events */

#endif

static void CACA_update_keybox(unsigned plotno, unsigned x, unsigned y);

/* libcaca helper functions */

/* CACA_put_transparent_char() attempts to 'merge' line drawing characters and does not

change the background color. That way filled areas do not get overwritten. */

static void CACA_put_transparent_char(caca_canvas_t *cv, int x, int y, uint32_t c);

/* modified copies of libcaca functions which use CACA_put_transparent_char() */

static int CACA_put_str(caca_canvas_t *cv, int x, int y, char const *s);

static void CACA_draw_line(caca_canvas_t *cv, int x1, int y1, int x2, int y2, uint32_t ch);

static void CACA_draw_thin_line(caca_canvas_t *cv, int x1, int y1, int x2, int y2);

static void CACA_draw_thin_polyline(caca_canvas_t *cv, int const x[], int const y[], int n);

static int CACA_draw_cp437_box(caca_canvas_t *cv, int x, int y, int w, int h);

static int CACA_draw_thin_box(caca_canvas_t *cv, int x, int y, int w, int h);

static uint8_t CACA_rgb_to_ansi(uint32_t color); /* Convert RGB to ANSI background color */

static char const * CACA_get_color_name(uint8_t color); /* Find name of nearest matching predefined color */

static char * CACA_encode_text(const char *str); /* map strings according to current encoding */

static int gp_kbhit(void); /* kbhit() implementation */

/* Types, Enums */

enum CACA_charset {

CACA_ASCII = 0, CACA_BLOCKS, CACA_UNICODE

};

typedef struct {

int x;

int y;

} CACA_POINT;

typedef struct {

int left;

int right;

int top;

int bottom;

} CACA_RECT;

typedef struct CACA_HYPERTEXT_S {

CACA_POINT loc;

char * text;

struct CACA_HYPERTEXT_S * next;

} CACA_HYPERTEXT;

/* Internal Variables */

/* settings */

static int CACA_xmax = CACA_XMAX; /* terminal size, same as term->xmax */

static int CACA_ymax = CACA_YMAX;

static enum CACA_charset CACA_charset = CACA_BLOCKS;

static TBOOLEAN CACA_truecolor = FALSE; /* does backend support truecolor? */

static uint8_t CACA_background = CACA_WHITE; /* background color */

static char * CACA_driver = NULL; /* backend driver name */

static TBOOLEAN CACA_mono = FALSE; /* use greyscale only? */

static TBOOLEAN CACA_force_truecolor = FALSE; /* override the terminals hard-coded truecolor setting */

static TBOOLEAN CACA_inverted = FALSE; /* use inverterted color (black background) */

static char * CACA_title = NULL; /* windows title */

static caca_display_t * CACA_dp;

static caca_canvas_t * CACA_cv = NULL;

static caca_canvas_t * CACA_screen_cv;

static caca_canvas_t * CACA_suspend_cv = NULL;

static TBOOLEAN CACA_windowed = FALSE; /* graphics output in different window*/

static TBOOLEAN CACA_exportonly = FALSE; /* no output to screen but to file */

static TBOOLEAN CACA_processing_events = FALSE; /* flag processing of events in CACA_text() */

static TBOOLEAN CACA_nosuspend; /* no suspend for null and raw drivers */

#ifdef _WIN32

static unsigned CACA_codepage = 0;

#endif

/* drawing */

static char CACA_pen; /* current character used to draw point symbols */

static int CACA_x = -1; /* current X position */

static int CACA_y = -1; /* current Y position */

static int CACA_ang = 0; /* current text angle */

static uint32_t CACA_next_text_attr = 0; /* next text attribute (bold/italic support) */

/* newpath/closepath support */

static TBOOLEAN CACA_in_path = FALSE;

static int * CACA_path_x = NULL;

static int * CACA_path_y = NULL;

static int CACA_maxpath = 0;

static int CACA_polygon_points = 0;

static TBOOLEAN CACA_invertfill = TRUE; /* Switch foreground/background color for filling of polygons and boxes? */

/* mousing */

#ifdef USE_MOUSE

static const int CACA_status_height = 1; /* height of status line */

static CACA_POINT CACA_mouse; /* current mouse position */

static char * CACA_status_text = NULL; /* current status line text */

static int CACA_ruler_line = FALSE; /* status of ruler line */

static CACA_POINT CACA_ruler = {-1, -1}; /* ruler position */

static TBOOLEAN CACA_zooming = FALSE; /* mouse zooming */

static CACA_POINT CACA_zoom_from;

static char * CACA_zoom_from_text = NULL;

static CACA_POINT CACA_zoom_to;

static char * CACA_zoom_to_text = NULL;

#else

static const int CACA_status_height = 0;

#endif

/* boxed text */

static struct s_boxedtext {

TBOOLEAN boxed;

CACA_POINT margin;

CACA_RECT box;

int angle;

} CACA_boxedtext;

/* hypertext */

static CACA_HYPERTEXT * CACA_hypertext_list = NULL;

static CACA_HYPERTEXT * CACA_last_hypertext = NULL;

/* interactive hiding of plots */

static int CACA_plotno = 0;

static int CACA_maxhideplots = 0;

static TBOOLEAN * CACA_hideplot = NULL;

static int CACA_maxkeyboxes = 0;

static CACA_RECT * CACA_keyboxes;

static int CACA_skipplot = FALSE;

static int CACA_keysample = FALSE;

static TBOOLEAN CACA_zoom_or_replot = FALSE; /* do not reset above variables when zooming/replotting */

/* colors */

static const char CACA_AXIS_CONST = '\1';

static const char CACA_BORDER_CONST = '\2';

static const int CACA_colors[9] = {

CACA_BLACK, CACA_LIGHTGRAY,

CACA_LIGHTRED, CACA_LIGHTGREEN, CACA_LIGHTBLUE, CACA_LIGHTMAGENTA,

CACA_LIGHTCYAN, CACA_BROWN, CACA_BLACK

};

/* Unicode light box drawing characters */

enum CACA_box_drawing_chars {

BOX_HOR = 0x2500,

BOX_VERT = 0x2502,

BOX_UP_LEFT = 0x2518,

BOX_UP_HOR = 0x2534,

BOX_UP_RIGHT = 0x2514,

BOX_VERT_LEFT = 0x2524,

BOX_VERT_HOR = 0x253c,

BOX_VERT_RIGHT = 0x251c,

BOX_DOWN_LEFT = 0x2510,

BOX_DOWN_HOR = 0x252c,

BOX_DOWN_RIGHT = 0x250c

};

/* option names */

enum CACA_id { CACA_DEFAULTOPTIONS,

CACA_DRIVER, CACA_FORMAT,

CACA_SIZE, CACA_TITLE,

CACA_COLOR, CACA_MONOCHROME,

CACA_TRUECOLOR, CACA_NOTRUECOLOR,

CACA_INVERTED, CACA_NOINVERTED,

CACA_CHARSET, CACA_BACKGROUND,

CACA_ENH, CACA_NOENH,

CACA_OTHER };

static struct gen_table CACA_opts[] =

{

{ "def$ault", CACA_DEFAULTOPTIONS },

{ "driver", CACA_DRIVER },

{ "format", CACA_FORMAT },

{ "size", CACA_SIZE },

{ "ti$tle", CACA_TITLE },

{ "c$olor", CACA_COLOR },

{ "c$olour", CACA_COLOR },

{ "m$onochrome", CACA_MONOCHROME },

{ "inv$erted", CACA_INVERTED },

{ "noinv$erted", CACA_NOINVERTED },

{ "ch$arset", CACA_CHARSET },

{ "backg$round", CACA_BACKGROUND },

{ "enh$anced", CACA_ENH },

{ "noe$nhanced", CACA_NOENH },

{ "tru$ecolor", CACA_TRUECOLOR },

{ "notru$ecolor", CACA_NOTRUECOLOR },

{ NULL, CACA_OTHER }

};

TERM_PUBLIC void

CACA_options()

{

while (!END_OF_COMMAND) {

switch ((enum CACA_id) lookup_table(&CACA_opts[0], c_token)) {

case CACA_DEFAULTOPTIONS:

term->put_text = CACA_enhanced_put_text;

term->flags |= TERM_ENHANCED_TEXT;

term->flags |= TERM_NO_OUTPUTFILE;

term->flags &= ~TERM_MONOCHROME;

free(CACA_driver);

CACA_driver = NULL;

free(CACA_title);

CACA_title = NULL;

CACA_background = CACA_WHITE;

CACA_charset = CACA_BLOCKS;

term->xmax = CACA_xmax = CACA_XMAX;

term->ymax = CACA_ymax = CACA_YMAX;

CACA_mono = FALSE;

CACA_inverted = FALSE;

break;

case CACA_ENH:

c_token++;

term->put_text = CACA_enhanced_put_text;

term->flags |= TERM_ENHANCED_TEXT;

break;

case CACA_NOENH:

c_token++;

term->put_text = CACA_put_text;

term->flags &= ~TERM_ENHANCED_TEXT;

break;

case CACA_CHARSET: {

c_token++;

/* Character set to use for fills, lines and points */

if (equals(c_token, "ascii"))

CACA_charset = CACA_ASCII;

else if (equals(c_token, "blocks"))

CACA_charset = CACA_BLOCKS;

else if (equals(c_token, "unicode"))

CACA_charset = CACA_UNICODE;

else if (!END_OF_COMMAND)

int_error(c_token, "Unknown character set.");

else

int_error(c_token, "Option `charset` requires an argument, see `help caca`.");

c_token++;

break;

}

case CACA_BACKGROUND: {

uint32_t CACA_background_rgb;

c_token++;

CACA_background_rgb = parse_color_name();

CACA_background = CACA_rgb_to_ansi(CACA_background_rgb);

FPRINTF((stderr, "CACA: background color = %06x, bg = %0x name = %s\n",

CACA_background_rgb, CACA_background, CACA_get_color_name(CACA_background)));

break;

}

case CACA_FORMAT:

case CACA_DRIVER: {

char const * const * format_list;

int i;

c_token++;

if (equals(c_token, "default")) {

c_token++;

CACA_close_display();

free(CACA_driver);

CACA_driver = NULL;

} else if (equals(c_token, "list")) {

c_token++;

fprintf(stderr, "caca drivers: ");

format_list = caca_get_display_driver_list();

for (i = 0; format_list[i] != NULL; i += 2) {

/* suppress null and raw drivers */

if ((strcmp(format_list[i], "null") != 0) &&

(strcmp(format_list[i], "raw") != 0))

fprintf(stderr, "%s ", format_list[i]);

}

fprintf(stderr, "\ncaca export formats: ");

format_list = caca_get_export_list();

for (i = 0; format_list[i] != NULL; i += 2)

fprintf(stderr, "%s ", format_list[i]);

fprintf(stderr, "\n");

return;

} else {

if (!END_OF_COMMAND) {

char * driver = NULL;

m_capture(&driver, c_token, c_token);

c_token++;

/* Has driver changed? */

if ((CACA_driver != NULL) && (strcmp(CACA_driver, driver) != 0))

CACA_close_display();

free(CACA_driver);

CACA_driver = driver;

} else {

int_error(c_token, "Option `driver` requires an argument, see `help caca`.");

}

/* Test the list of export formats for a match. In that case

we do not display anything but save the graph to a file. */

CACA_exportonly = FALSE;

if (CACA_driver != NULL) {

format_list = caca_get_export_list();

for (i = 0; format_list[i] != NULL; i += 2) {

if (strcmp(format_list[i], CACA_driver) == 0) {

CACA_exportonly = TRUE;

break;

}

/* Verify that the driver is valid. If it is an export format

it was detected already above. */

if ((CACA_driver != NULL) && !CACA_exportonly) {

TBOOLEAN found = FALSE;

format_list = caca_get_display_driver_list();

for (i = 0; format_list[i] != NULL; i += 2) {

if (strcmp(format_list[i], CACA_driver) == 0) {

found = TRUE;

break;

}

if (!found) {

free(CACA_driver);

CACA_driver = NULL;

int_error(c_token, "Unknown driver or export format.");

}

/* raw and null drivers may not _suspend() */

if (strcmp(CACA_driver, "null") == 0 || strcmp(CACA_driver, "raw") == 0)

CACA_nosuspend = TRUE;

else

CACA_nosuspend = FALSE;

if (CACA_exportonly)

term->flags &= ~TERM_NO_OUTPUTFILE;

else

term->flags |= TERM_NO_OUTPUTFILE;

break;

}

case CACA_COLOR:

c_token++;

CACA_mono = FALSE;

term->flags &= ~TERM_MONOCHROME;

break;

case CACA_MONOCHROME:

c_token++;

CACA_mono = TRUE;

term->flags |= TERM_MONOCHROME;

break;

case CACA_INVERTED:

c_token++;

CACA_inverted = TRUE;

CACA_background = CACA_BLACK;

break;

case CACA_NOINVERTED:

c_token++;

CACA_inverted = FALSE;

CACA_background = CACA_WHITE;

break;

case CACA_TRUECOLOR:

c_token++;

CACA_force_truecolor = TRUE;

break;

case CACA_NOTRUECOLOR:

c_token++;

CACA_force_truecolor = FALSE;

break;

case CACA_SIZE: {

float width, height;

c_token++;

parse_term_size(&width, &height, PIXELS);

term->xmax = CACA_xmax = width - 1;

term->ymax = CACA_ymax = height - 1;

break;

}

case CACA_TITLE:

c_token++;

if (!END_OF_COMMAND) {

free(CACA_title);

CACA_title = strdup(try_to_get_string());

} else {

int_error(c_token, "Option `title` requires an argument, see `help caca`.");

}

break;

case CACA_OTHER:

default:

int_error(c_token, "extraneous argument in set terminal %s", term->name);

break;

}

CACA_update_options();

#ifdef DEBUG

{

int i;

for (i = 0; i < 16; i++) {

fprintf(stderr, "CACA: color #%i = %s\n", i, CACA_get_color_name(i));

}

#endif

}

static void

CACA_update_options(void)

{

char options[MAX_LINE_LEN + 1];

int n;

term_options[0] = NUL;

if (CACA_driver != NULL)

snprintf(term_options, MAX_LINE_LEN + 1, "%s %s ", CACA_exportonly ? "format" : "driver", CACA_driver);

if (CACA_title != NULL) {

n = snprintf(options, MAX_LINE_LEN, "title \"%s\" ", CACA_title);

if (n >= MAX_LINE_LEN) options[MAX_LINE_LEN] = NUL;

strcat(term_options, options);

}

n = snprintf(options, MAX_LINE_LEN + 1, "%senhanced size %d, %d background rgb \"%s\" %s %s ",

(term->flags & TERM_ENHANCED_TEXT) ? "" : "no",

CACA_xmax + 1, CACA_ymax + 1,

CACA_get_color_name(CACA_background),

CACA_mono ? "monochrome" : "color",

CACA_inverted ? "inverted" : "noinverted");

if (n >= MAX_LINE_LEN) options[MAX_LINE_LEN] = NUL;

strcat(term_options, options);

strcat(term_options, "charset ");

switch (CACA_charset) {

case CACA_ASCII:

strcat(term_options, "ascii");

break;

case CACA_BLOCKS:

strcat(term_options, "blocks");

break;

case CACA_UNICODE:

strcat(term_options, "unicode");

break;

}

TERM_PUBLIC void

CACA_init()

{

CACA_init_display();

if (CACA_cv != NULL)

caca_clear_canvas(CACA_cv);

if (CACA_dp != NULL) {

#ifdef USE_MOUSE

CACA_print_status();

#endif

caca_refresh_display(CACA_dp);

CACA_check_resize();

}

static void

CACA_refresh(void)

{

CACA_HYPERTEXT * hypertext = CACA_hypertext_list;

if ((CACA_dp == NULL) || (CACA_cv == NULL) || CACA_exportonly)

return;

/* copy graph to screen canvas */

caca_blit(CACA_screen_cv, 0, 0, CACA_cv, NULL);

#ifdef USE_MOUSE

/* hypertext */

while (hypertext) {

if ((CACA_mouse.x == hypertext->loc.x) && (CACA_mouse.y == hypertext->loc.y)) {

uint32_t attr = caca_get_attr(CACA_screen_cv, -1, -1);

caca_set_color_ansi(CACA_screen_cv, CACA_background, !CACA_inverted ? CACA_BLACK : CACA_WHITE);

caca_put_str(CACA_screen_cv,

CACA_mouse.x + 1, CACA_ymax - CACA_mouse.y,

hypertext->text);

caca_set_attr(CACA_screen_cv, attr);

break;

}

hypertext = hypertext->next;

}

/* draw ruler */

if (CACA_ruler.x >= 0) {

uint32_t attr = caca_get_attr(CACA_screen_cv, -1, -1);

caca_set_color_ansi(CACA_screen_cv, !CACA_inverted ? CACA_BLACK : CACA_WHITE, CACA_background);

if (CACA_charset == CACA_ASCII) {

CACA_draw_thin_line(CACA_screen_cv,

CACA_ruler.x, 0, CACA_ruler.x, CACA_ymax);

CACA_draw_thin_line(CACA_screen_cv, 0,

CACA_ymax - CACA_ruler.y, CACA_xmax,

CACA_ymax - CACA_ruler.y);

CACA_put_transparent_char(CACA_screen_cv, CACA_ruler.x, CACA_ymax - CACA_ruler.y, L'+');

} else { /* BLOCKS / UNICODE */

CACA_draw_line(CACA_screen_cv,

CACA_ruler.x, 0, CACA_ruler.x, CACA_ymax, BOX_VERT);

CACA_draw_line(CACA_screen_cv, 0,

CACA_ymax - CACA_ruler.y, CACA_xmax,

CACA_ymax - CACA_ruler.y, BOX_HOR);

CACA_put_transparent_char(CACA_screen_cv, CACA_ruler.x, CACA_ymax - CACA_ruler.y, BOX_VERT_HOR);

}

/* ruler line */

if (CACA_ruler_line) {

CACA_draw_thin_line(CACA_screen_cv,

CACA_ruler.x, CACA_ymax - CACA_ruler.y,

CACA_mouse.x, CACA_ymax - CACA_mouse.y);

}

caca_set_attr(CACA_screen_cv, attr);

}

/* draw zoom box */

if (CACA_zooming) {

if (CACA_charset == CACA_ASCII)

caca_draw_thin_box(CACA_screen_cv,

CACA_zoom_from.x, CACA_ymax - CACA_zoom_from.y,

CACA_zoom_to.x - CACA_zoom_from.x + 1,

CACA_zoom_from.y - CACA_zoom_to.y + 1);

else /* BLOCKS / UNICODE */

caca_draw_cp437_box(CACA_screen_cv,

CACA_zoom_from.x, CACA_ymax - CACA_zoom_from.y,

CACA_zoom_to.x - CACA_zoom_from.x + 1,

CACA_zoom_from.y - CACA_zoom_to.y + 1);

if (CACA_zoom_from_text) {

char *separator = strchr(CACA_zoom_from_text, '\r');

if (separator) {

*separator = NUL;

caca_put_str(CACA_screen_cv,

CACA_zoom_from.x + 1, CACA_ymax - CACA_zoom_from.y - 1,

CACA_zoom_from_text);

caca_put_str(CACA_screen_cv,

CACA_zoom_from.x + 1, CACA_ymax - CACA_zoom_from.y,

separator + 1);

*separator = '\r';

} else {

caca_put_str(CACA_screen_cv,

CACA_zoom_from.x + 1, CACA_ymax - CACA_zoom_from.y - 1,

CACA_zoom_from_text);

}

if (CACA_zoom_to_text) {

char *separator = strchr(CACA_zoom_to_text, '\r');

if (separator) {

*separator = NUL;

caca_put_str(CACA_screen_cv,

CACA_zoom_to.x + 1, CACA_ymax - CACA_zoom_to.y - 1,

CACA_zoom_to_text);

caca_put_str(CACA_screen_cv,

CACA_zoom_to.x + 1, CACA_ymax - CACA_zoom_to.y,

separator + 1);

*separator = '\r';

} else {

caca_put_str(CACA_screen_cv,

CACA_zoom_to.x + 1, CACA_ymax - CACA_zoom_to.y - 1,

CACA_zoom_to_text);

}

/* status line */

CACA_print_status();

#endif

/* update display */

caca_refresh_display(CACA_dp);

}

static void

CACA_check_resize()

{

caca_event_t ev;

if ((CACA_dp == NULL) || (CACA_cv == NULL) || CACA_exportonly)

return;

if (caca_get_event(CACA_dp, CACA_EVENT_RESIZE, &ev, 100)) {

FPRINTF((stderr, "CACA: resize event detected in check_resize().\n"));

term->xmax = CACA_xmax = GPMAX(caca_get_event_resize_width(&ev) - 1, 1);

term->ymax = CACA_ymax = GPMAX(caca_get_event_resize_height(&ev) - 1 - CACA_status_height, 1);

caca_set_canvas_size(CACA_cv, term->xmax + 1, term->ymax + 1);

CACA_update_options();

CACA_refresh();

} else if ((caca_get_canvas_width(CACA_screen_cv) != term->xmax + 1) ||

(caca_get_canvas_height(CACA_screen_cv) != term->ymax + 1 + CACA_status_height)) {

/* Did we miss a resize event? */

FPRINTF((stderr, "CACA: missed resize event in check_resize().\n"));

term->xmax = CACA_xmax = GPMAX(caca_get_canvas_width(CACA_screen_cv) - 1, 1);

term->ymax = CACA_ymax = GPMAX(caca_get_canvas_height(CACA_screen_cv) - 1 - CACA_status_height, 1);

caca_set_canvas_size(CACA_cv, term->xmax + 1, term->ymax + 1);

CACA_update_options();

CACA_refresh();

}

void

CACA_sigint_handler(int sig)

{

if (!CACA_windowed)

CACA_close_display();

interrupt_setup();

raise(SIGINT);

}

static void

CACA_init_display(void)

{

if ((CACA_dp == NULL) && !CACA_exportonly) {

if (CACA_driver == NULL)

CACA_dp = caca_create_display(NULL);

else if (!CACA_exportonly)

CACA_dp = caca_create_display_with_driver(NULL, CACA_driver);

}

if (CACA_dp != NULL) {

if (CACA_driver == NULL)

CACA_driver = strdup(caca_get_display_driver(CACA_dp));

CACA_windowed = (strcmp(CACA_driver, "x11") == 0);

CACA_windowed |= (strcmp(CACA_driver, "gl") == 0);

#if defined(_WIN32) && !defined(WGP_CONSOLE)

CACA_windowed |= (strcmp(CACA_driver, "win32") == 0);

#endif

#ifdef USE_MOUSE

if (CACA_windowed)

term->waitforinput = CACA_waitforinput;

else

term->waitforinput = NULL;

caca_set_mouse(CACA_dp, 1);

#endif

/* NOTE: Info on truecolor support is not available from libcaca and

is thus hard-coded here. The checks below have to be adopted

whenever libcaca evolves. */

CACA_truecolor = (strcmp(CACA_driver, "x11") == 0);

CACA_truecolor |= (strcmp(CACA_driver, "gl") == 0);

CACA_truecolor |= CACA_force_truecolor;

FPRINTF((stderr, "CACA: driver = '%s'\n", CACA_driver));

caca_set_display_title(CACA_dp,

(CACA_title != NULL) ? CACA_title : "gnuplot: caca terminal");

CACA_screen_cv = caca_get_canvas(CACA_dp);

term->xmax = CACA_xmax = GPMAX(caca_get_canvas_width(CACA_screen_cv) - 1, 1);

term->ymax = CACA_ymax = GPMAX(caca_get_canvas_height(CACA_screen_cv) - 1 - CACA_status_height, 1);

if (CACA_xmax <= 1 || CACA_ymax <= 1)

int_error(NO_CARET, "caca: canvas too small");

CACA_update_options();

if ((strcmp(CACA_driver, "x11") == 0) || (strcmp(CACA_driver, "ncurses") == 0)) {

/* NOTE: The ncurses and x11 backends change LC_ALL. We try to

(partially) revert this again: */

setlocale(LC_TIME, time_locale != NULL ? time_locale : "C");

setlocale(LC_NUMERIC, numeric_locale != NULL ? numeric_locale : "C");

}

if (strcmp(CACA_driver, "slang") == 0) {

/* NOTE: The slang backend driver sets its own signal handler for SIGINT */

signal(SIGINT, CACA_sigint_handler);

}

#ifdef _WIN32

if (strcmp(CACA_driver, "win32") == 0) {

/* Disable quick-edit mode to enable mouse input */

HANDLE h = GetStdHandle(STD_INPUT_HANDLE);

DWORD mode;

unsigned codepage;

GetConsoleMode(h, &mode);

SetConsoleMode(h, (mode & ~ENABLE_QUICK_EDIT_MODE) | ENABLE_EXTENDED_FLAGS);

/* On CJK Windows we change the codepage. Not sure why this

solves the display problems, but apparently it works. See bug #1361. */

codepage = GetConsoleOutputCP();

if (codepage == 932 || codepage == 936 || codepage == 950) {

CACA_codepage = codepage;

SetConsoleOutputCP(437);

}

#ifndef WGP_CONSOLE

SetConsoleCtrlHandler(ConsoleHandler, TRUE);

#endif

}

#endif

} else if (CACA_exportonly) {

/* NOTE: Info on truecolor support is not available from libcaca and

is thus hard-coded here. The checks below have to be adopted

whenever libcaca evolves. */

CACA_truecolor = TRUE; /* caca, html, html3, (bbfr,) ps, svg */

if ((strcmp(CACA_driver, "troff") == 0) ||

(strcmp(CACA_driver, "tga") == 0))

CACA_truecolor = FALSE;

CACA_truecolor |= CACA_force_truecolor;

CACA_windowed = FALSE;

#ifdef USE_MOUSE

term->waitforinput = NULL;

#endif

} else {

/* The driver initialization by libcaca failed. */

fprintf(stderr, "ERROR: Failed to initialize libcaca %s driver!\n", (CACA_driver != NULL) ? CACA_driver : "default");

CACA_windowed = FALSE;

#ifdef USE_MOUSE

term->waitforinput = NULL;

#endif

CACA_truecolor = FALSE;

}

FPRINTF((stderr, "CACA_driver = %s, truecolor = %i\n", CACA_driver, CACA_truecolor));

CACA_cv = caca_create_canvas(term->xmax + 1, term->ymax + 1);

if (CACA_cv != NULL) {

caca_set_color_ansi(CACA_cv, !CACA_inverted ? CACA_BLACK : CACA_WHITE, CACA_background);

}

static void

CACA_init_aspect_ratio(void)

{

int width = 6;

int height = 10;

if (CACA_dp) {

height = caca_get_display_height(CACA_dp) / (CACA_ymax + CACA_status_height + 1);

width = caca_get_display_width(CACA_dp) / (CACA_xmax + 1);

/* The caca man page says "these functions never fail". */

/* But in practice they can return 0. */

}

if (height == 0 || width == 0) {

term->h_tic = term->v_tic = 1;

} else if (height > width) {

term->h_tic = (height + width / 2) / width;

term->v_tic = 1;

} else {

term->h_tic = 1;

term->v_tic = (width + height / 2) / height;

}

TERM_PUBLIC void

CACA_graphics()

{

CACA_HYPERTEXT * hypertext;

if (CACA_dp == NULL) {

CACA_init();

if (CACA_cv == NULL)

fprintf(stderr, "ERROR: Failed to setup up libcaca canvas!\n");

}

if (CACA_cv == NULL)

return;

caca_set_color_ansi(CACA_cv, !CACA_inverted ? CACA_BLACK : CACA_WHITE, CACA_background);

caca_clear_canvas(CACA_cv);

if (CACA_dp != NULL) {

#ifdef USE_MOUSE

CACA_print_status();

#endif

CACA_check_resize();

}

FPRINTF((stderr, "CACA: terminal size %i x %i\n", CACA_xmax + 1, CACA_ymax + 1 + CACA_status_height));

CACA_init_angles();

CACA_init_aspect_ratio();

CACA_x = -1;

CACA_y = -1;

/* clear hypertext labels */

hypertext = CACA_hypertext_list;

while (hypertext != NULL) {

CACA_HYPERTEXT * next = hypertext->next;

free(hypertext->text);

free(hypertext);

hypertext = next;

};

CACA_hypertext_list = NULL;

CACA_last_hypertext = NULL;

/* Reset layer variables */

CACA_plotno = 0;

CACA_skipplot = FALSE;

CACA_keysample = FALSE;

if (CACA_zoom_or_replot) {

CACA_zoom_or_replot = FALSE;

} else {

int i;

for (i = 0; i < CACA_maxhideplots; i++)

CACA_hideplot[i] = FALSE;

for (i = 0; i < CACA_maxkeyboxes; i++) {

CACA_keyboxes[i].left = INT_MAX;

CACA_keyboxes[i].right = 0;

CACA_keyboxes[i].bottom = INT_MAX;

CACA_keyboxes[i].top = 0;

}

TERM_PUBLIC void

CACA_text()

{

if (CACA_cv == NULL)

return;

if (CACA_dp != NULL)

CACA_refresh();

#ifdef USE_MOUSE

exec_event(GE_plotdone, 0, 0, 0, 0, 0);

if (!CACA_windowed && !CACA_processing_events && !CACA_exportonly && !CACA_nosuspend) {

/* Test for input redirection */

if (isatty(fileno(stdin))) {

/* NOTE: This is a hack to force a call to _graphics() before redrawing.

The vgagl terminal uses the very same trick. */

term_graphics = FALSE;

CACA_processing_events = TRUE;

while (CACA_process_events() == CACA_loop);

/* Clean up remaining console events, as e.g. KEYUP events: */

CACA_discard_events();

CACA_processing_events = FALSE;

term_graphics = TRUE;

} else {

(void) getchar();

CACA_close_display();

}

#endif

/* Save canvas to file. */

if (CACA_exportonly) {

size_t bytes;

#ifndef USE_CACA_EXPORT_MEMORY

/* available since 0.99.beta17 */

void * data = caca_export_canvas_to_memory(CACA_cv, CACA_driver, &bytes);

#else

void * data = caca_export_memory(CACA_cv, CACA_driver, &bytes);

#endif

if (data != NULL) {

fwrite(data, 1, bytes, gpoutfile);

free(data);

}

#if defined(_WIN32) && !defined(WGP_CONSOLE)

/* Raise the console (graph!) window. Beware: */

/* we cannot call RaiseConsole() to do this. */

else {

HWND console = GetConsoleWindow();

if (console != NULL) {

ShowWindow(console, SW_SHOWNORMAL);

BringWindowToTop(console);

SetFocus(console);

}

#endif

#if defined(WGP_CONSOLE)

/* libcaca seems to leave stdout in wide mode */

fflush(stdout);

_setmode(fileno(stdout), _O_TEXT);

#endif

}

static void

CACA_close_display(void)

{

/* make a copy of the current canvas */

if ((CACA_dp != NULL) || (CACA_cv != NULL)) {

if (!CACA_windowed && !CACA_nosuspend) {

if (CACA_suspend_cv != NULL)

caca_free_canvas(CACA_suspend_cv);

CACA_suspend_cv = caca_create_canvas(CACA_xmax + 1, CACA_ymax + 1 + CACA_status_height);

if (CACA_cv != NULL && CACA_suspend_cv != NULL)

caca_blit(CACA_suspend_cv, 0, 0, CACA_cv, NULL);

}

if (CACA_cv != NULL) {

caca_free_canvas(CACA_cv);

CACA_cv = NULL;

}

if (CACA_dp != NULL) {

caca_set_display_title(CACA_dp, "gnuplot");

caca_free_display(CACA_dp);

CACA_dp = NULL;

}

#ifdef _WIN32

if (strcmp(CACA_driver, "win32") == 0) {

#ifndef WGP_CONSOLE

FreeConsole(); /* close the console window */

#endif

/* Revert to previous codepage if necessary */

if (CACA_codepage != 0) {

View remainder of file in raw view

gnuplot/term/caca.trm at master · gnuplot/gnuplot · GitHub

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