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elinks/src/terminal/screen.c
2006-07-27 09:51:10 +02:00

909 lines
24 KiB
C

/* Terminal screen drawing routines. */
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <string.h>
#include "elinks.h"
#include "config/options.h"
#include "intl/charsets.h"
#include "main/module.h"
#include "osdep/ascii.h"
#include "osdep/osdep.h"
#include "terminal/color.h"
#include "terminal/draw.h"
#include "terminal/hardio.h"
#include "terminal/kbd.h"
#include "terminal/screen.h"
#include "terminal/terminal.h"
#include "util/conv.h"
#include "util/error.h"
#include "util/memory.h"
#include "util/string.h"
/* TODO: We must use termcap/terminfo if available! --pasky */
unsigned char frame_dumb[48] = " ||||++||++++++--|-+||++--|-+----++++++++ ";
static unsigned char frame_vt100[48] = "aaaxuuukkuxkjjjkmvwtqnttmlvwtqnvvwwmmllnnjla ";
#ifndef CONFIG_UTF_8
/* For UTF8 I/O */
static unsigned char frame_vt100_u[48] = {
177, 177, 177, 179, 180, 180, 180, 191,
191, 180, 179, 191, 217, 217, 217, 191,
192, 193, 194, 195, 196, 197, 195, 195,
192, 218, 193, 194, 195, 196, 197, 193,
193, 194, 194, 192, 192, 218, 218, 197,
197, 217, 218, 177, 32, 32, 32, 32
};
#endif /* CONFIG_UTF_8 */
static unsigned char frame_freebsd[48] = {
130, 138, 128, 153, 150, 150, 150, 140,
140, 150, 153, 140, 139, 139, 139, 140,
142, 151, 152, 149, 146, 143, 149, 149,
142, 141, 151, 152, 149, 146, 143, 151,
151, 152, 152, 142, 142, 141, 141, 143,
143, 139, 141, 128, 128, 128, 128, 128,
};
static unsigned char frame_koi[48] = {
144, 145, 146, 129, 135, 178, 180, 167,
166, 181, 161, 168, 174, 173, 172, 131,
132, 137, 136, 134, 128, 138, 175, 176,
171, 165, 187, 184, 177, 160, 190, 185,
186, 182, 183, 170, 169, 162, 164, 189,
188, 133, 130, 141, 140, 142, 143, 139,
};
/* Most of this table is just 176 + <index in table>. */
static unsigned char frame_restrict[48] = {
176, 177, 178, 179, 180, 179, 186, 186,
205, 185, 186, 187, 188, 186, 205, 191,
192, 193, 194, 195, 196, 197, 179, 186,
200, 201, 202, 203, 204, 205, 206, 205,
196, 205, 196, 186, 205, 205, 186, 186,
179, 217, 218, 219, 220, 221, 222, 223,
};
#define TERM_STRING(str) INIT_STRING(str, sizeof(str) - 1)
#define add_term_string(str, tstr) \
add_bytes_to_string(str, (tstr).source, (tstr).length)
static struct string m11_hack_frame_seqs[] = {
/* end border: */ TERM_STRING("\033[10m"),
/* begin border: */ TERM_STRING("\033[11m"),
};
#ifdef CONFIG_UTF_8
static struct string utf8_linux_frame_seqs[] = {
/* end border: */ TERM_STRING("\033[10m\033%G"),
/* begin border: */ TERM_STRING("\033%@\033[11m"),
};
#endif /* CONFIG_UTF_8 */
static struct string vt100_frame_seqs[] = {
/* end border: */ TERM_STRING("\x0f"),
/* begin border: */ TERM_STRING("\x0e"),
};
static struct string underline_seqs[] = {
/* begin underline: */ TERM_STRING("\033[24m"),
/* end underline: */ TERM_STRING("\033[4m"),
};
/* Used in {add_char*()} and {redraw_screen()} to reduce the logic. It is
* updated from terminal._template_.* using option change_hooks. */
/* TODO: termcap/terminfo can maybe gradually be introduced via this
* structure. We'll see. --jonas */
struct screen_driver {
LIST_HEAD(struct screen_driver);
/* The terminal._template_.type. Together with the @name member the
* uniquely identify the screen_driver. */
enum term_mode_type type;
#ifndef CONFIG_UTF_8
/* Charsets when doing UTF8 I/O. */
/* [0] is the common charset and [1] is the frame charset.
* Test wether to use UTF8 I/O using the use_utf8_io() macro. */
int charsets[2];
#endif /* CONFIG_UTF_8 */
/* The frame translation table. May be NULL. */
unsigned char *frame;
/* The frame mode setup and teardown sequences. May be NULL. */
struct string *frame_seqs;
/* The underline mode setup and teardown sequences. May be NULL. */
struct string *underline;
/* The color mode */
enum color_mode color_mode;
/* These are directly derived from the terminal options. */
unsigned int transparent:1;
#ifdef CONFIG_UTF_8
/* UTF-8 I/O */
unsigned int utf8:1;
#endif /* CONFIG_UTF_8 */
/* The terminal._template_ name. */
unsigned char name[1]; /* XXX: Keep last! */
};
static struct screen_driver dumb_screen_driver = {
NULL_LIST_HEAD,
/* type: */ TERM_DUMB,
#ifndef CONFIG_UTF_8
/* charsets: */ { -1, -1 }, /* No UTF8 I/O */
#endif /* CONFIG_UTF_8 */
/* frame: */ frame_dumb,
/* frame_seqs: */ NULL,
/* underline: */ underline_seqs,
/* color_mode: */ COLOR_MODE_16,
/* transparent: */ 1,
#ifdef CONFIG_UTF_8
/* utf-8: */ 0,
#endif /* CONFIG_UTF_8 */
};
static struct screen_driver vt100_screen_driver = {
NULL_LIST_HEAD,
/* type: */ TERM_VT100,
#ifndef CONFIG_UTF_8
/* charsets: */ { -1, -1 }, /* No UTF8 I/O */
#endif /* CONFIG_UTF_8 */
/* frame: */ frame_vt100,
/* frame_seqs: */ vt100_frame_seqs,
/* underline: */ underline_seqs,
/* color_mode: */ COLOR_MODE_16,
/* transparent: */ 1,
#ifdef CONFIG_UTF_8
/* utf-8: */ 0,
#endif /* CONFIG_UTF_8 */
};
static struct screen_driver linux_screen_driver = {
NULL_LIST_HEAD,
/* type: */ TERM_LINUX,
#ifndef CONFIG_UTF_8
/* charsets: */ { -1, -1 }, /* No UTF8 I/O */
#endif /* CONFIG_UTF_8 */
/* frame: */ NULL, /* No restrict_852 */
/* frame_seqs: */ NULL, /* No m11_hack */
/* underline: */ underline_seqs,
/* color_mode: */ COLOR_MODE_16,
/* transparent: */ 1,
#ifdef CONFIG_UTF_8
/* utf-8: */ 0,
#endif /* CONFIG_UTF_8 */
};
static struct screen_driver koi8_screen_driver = {
NULL_LIST_HEAD,
/* type: */ TERM_KOI8,
#ifndef CONFIG_UTF_8
/* charsets: */ { -1, -1 }, /* No UTF8 I/O */
#endif /* CONFIG_UTF_8 */
/* frame: */ frame_koi,
/* frame_seqs: */ NULL,
/* underline: */ underline_seqs,
/* color_mode: */ COLOR_MODE_16,
/* transparent: */ 1,
#ifdef CONFIG_UTF_8
/* utf-8: */ 0,
#endif /* CONFIG_UTF_8 */
};
static struct screen_driver freebsd_screen_driver = {
NULL_LIST_HEAD,
/* type: */ TERM_FREEBSD,
#ifndef CONFIG_UTF_8
/* charsets: */ { -1, -1 }, /* No UTF8 I/O */
#endif /* CONFIG_UTF_8 */
/* frame: */ frame_freebsd,
/* frame_seqs: */ NULL, /* No m11_hack */
/* underline: */ underline_seqs,
/* color_mode: */ COLOR_MODE_16,
/* transparent: */ 1,
#ifdef CONFIG_UTF_8
/* utf-8: */ 0,
#endif /* CONFIG_UTF_8 */
};
/* XXX: Keep in sync with enum term_mode_type. */
static struct screen_driver *screen_drivers[] = {
/* TERM_DUMB: */ &dumb_screen_driver,
/* TERM_VT100: */ &vt100_screen_driver,
/* TERM_LINUX: */ &linux_screen_driver,
/* TERM_KOI8: */ &koi8_screen_driver,
/* TERM_FREEBSD: */ &freebsd_screen_driver,
};
#ifdef CONFIG_UTF_8
#define use_utf8_io(driver) ((driver)->utf8)
#else
#define use_utf8_io(driver) ((driver)->charsets[0] != -1)
#endif /* CONFIG_UTF_8 */
static INIT_LIST_HEAD(active_screen_drivers);
static void
update_screen_driver(struct screen_driver *driver, struct option *term_spec)
{
#ifdef CONFIG_UTF_8
driver->utf8 = get_opt_bool_tree(term_spec, "utf_8_io");
#else
int utf8_io = get_opt_bool_tree(term_spec, "utf_8_io");
#endif /* CONFIG_UTF_8 */
driver->color_mode = get_opt_int_tree(term_spec, "colors");
driver->transparent = get_opt_bool_tree(term_spec, "transparency");
if (get_opt_bool_tree(term_spec, "underline")) {
driver->underline = underline_seqs;
} else {
driver->underline = NULL;
}
#ifdef CONFIG_UTF_8
if (driver->type == TERM_LINUX) {
if (get_opt_bool_tree(term_spec, "restrict_852"))
driver->frame = frame_restrict;
if (get_opt_bool_tree(term_spec, "m11_hack"))
driver->frame_seqs = m11_hack_frame_seqs;
if (driver->utf8)
driver->frame_seqs = utf8_linux_frame_seqs;
} else if (driver->type == TERM_FREEBSD) {
if (get_opt_bool_tree(term_spec, "m11_hack"))
driver->frame_seqs = m11_hack_frame_seqs;
} else if (driver->type == TERM_VT100) {
driver->frame = frame_vt100;
}
#else
if (utf8_io) {
driver->charsets[0] = get_opt_codepage_tree(term_spec, "charset");
if (driver->type == TERM_LINUX) {
if (get_opt_bool_tree(term_spec, "restrict_852"))
driver->frame = frame_restrict;
driver->charsets[1] = get_cp_index("cp437");
} else if (driver->type == TERM_FREEBSD) {
driver->charsets[1] = get_cp_index("cp437");
} else if (driver->type == TERM_VT100) {
driver->frame = frame_vt100_u;
driver->charsets[1] = get_cp_index("cp437");
} else if (driver->type == TERM_KOI8) {
driver->charsets[1] = get_cp_index("koi8-r");
} else {
driver->charsets[1] = driver->charsets[0];
}
} else {
driver->charsets[0] = -1;
if (driver->type == TERM_LINUX) {
if (get_opt_bool_tree(term_spec, "restrict_852"))
driver->frame = frame_restrict;
if (get_opt_bool_tree(term_spec, "m11_hack"))
driver->frame_seqs = m11_hack_frame_seqs;
} else if (driver->type == TERM_FREEBSD) {
if (get_opt_bool_tree(term_spec, "m11_hack"))
driver->frame_seqs = m11_hack_frame_seqs;
} else if (driver->type == TERM_VT100) {
driver->frame = frame_vt100;
}
}
#endif /* CONFIG_UTF_8 */
}
static int
screen_driver_change_hook(struct session *ses, struct option *term_spec,
struct option *changed)
{
enum term_mode_type type = get_opt_int_tree(term_spec, "type");
struct screen_driver *driver;
unsigned char *name = term_spec->name;
int len = strlen(name);
foreach (driver, active_screen_drivers)
if (driver->type == type && !memcmp(driver->name, name, len)) {
update_screen_driver(driver, term_spec);
break;
}
return 0;
}
static inline struct screen_driver *
add_screen_driver(enum term_mode_type type, struct terminal *term, int env_len)
{
struct screen_driver *driver;
/* One byte is reserved for name in struct screen_driver. */
driver = mem_alloc(sizeof(*driver) + env_len);
if (!driver) return NULL;
memcpy(driver, screen_drivers[type], sizeof(*driver) - 1);
memcpy(driver->name, term->spec->name, env_len + 1);
add_to_list(active_screen_drivers, driver);
update_screen_driver(driver, term->spec);
term->spec->change_hook = screen_driver_change_hook;
#ifdef CONFIG_UTF_8
term->utf8 = use_utf8_io(driver);
#endif /* CONFIG_UTF_8 */
return driver;
}
static inline struct screen_driver *
get_screen_driver(struct terminal *term)
{
enum term_mode_type type = get_opt_int_tree(term->spec, "type");
unsigned char *name = term->spec->name;
int len = strlen(name);
struct screen_driver *driver;
foreach (driver, active_screen_drivers) {
if (driver->type != type) continue;
if (memcmp(driver->name, name, len + 1)) continue;
/* Some simple probably useless MRU ;) */
move_to_top_of_list(active_screen_drivers, driver);
#ifdef CONFIG_UTF_8
term->utf8 = use_utf8_io(driver);
#endif /* CONFIG_UTF_8 */
return driver;
}
return add_screen_driver(type, term, len);
}
/* Release private screen drawing utilities. */
void
done_screen_drivers(struct module *xxx)
{
free_list(active_screen_drivers);
}
/* Adds the term code for positioning the cursor at @x and @y to @string.
* The template term code is: "\033[<@y>;<@x>H" */
static inline struct string *
add_cursor_move_to_string(struct string *screen, int y, int x)
{
#define CURSOR_NUM_LEN 10 /* 10 chars for @y and @x numbers should be more than enough. */
unsigned char code[4 + 2 * CURSOR_NUM_LEN + 1];
unsigned int length = 2;
code[0] = '\033';
code[1] = '[';
if (ulongcat(code, &length, y, CURSOR_NUM_LEN, 0) < 0)
return screen;
code[length++] = ';';
if (ulongcat(code, &length, x, CURSOR_NUM_LEN, 0) < 0)
return screen;
code[length++] = 'H';
return add_bytes_to_string(screen, code, length);
#undef CURSOR_NUM_LEN
}
struct screen_state {
unsigned char border;
unsigned char underline;
unsigned char bold;
unsigned char attr;
/* Following should match struct screen_char color field. */
#if defined(CONFIG_88_COLORS) || defined(CONFIG_256_COLORS)
unsigned char color[2];
#else
unsigned char color[1];
#endif
};
#if defined(CONFIG_88_COLORS) || defined(CONFIG_256_COLORS)
#define compare_color(a, b) ((a)[0] == (b)[0] && (a)[1] == (b)[1])
#define copy_color(a, b) do { (a)[0] = (b)[0]; (a)[1] = (b)[1]; } while (0)
#define INIT_SCREEN_STATE { 0xFF, 0xFF, 0xFF, 0, { 0xFF, 0xFF } }
#else
#define compare_color(a, b) ((a)[0] == (b)[0])
#define copy_color(a, b) do { (a)[0] = (b)[0]; } while (0)
#define INIT_SCREEN_STATE { 0xFF, 0xFF, 0xFF, 0, { 0xFF } }
#endif
#define compare_bg_color(a, b) (TERM_COLOR_BACKGROUND(a) == TERM_COLOR_BACKGROUND(b))
#define compare_fg_color(a, b) (TERM_COLOR_FOREGROUND(a) == TERM_COLOR_FOREGROUND(b))
#ifdef CONFIG_UTF_8
static inline void
add_char_data(struct string *screen, struct screen_driver *driver,
unicode_val_T data, unsigned char border)
#else
static inline void
add_char_data(struct string *screen, struct screen_driver *driver,
unsigned char data, unsigned char border)
#endif /* CONFIG_UTF_8 */
{
if (!isscreensafe(data)) {
add_char_to_string(screen, ' ');
return;
}
if (border && driver->frame && data >= 176 && data < 224)
data = driver->frame[data - 176];
if (use_utf8_io(driver)) {
#ifdef CONFIG_UTF_8
if (border)
add_char_to_string(screen, (unsigned char)data);
else
if (data != UCS_NO_CHAR)
add_to_string(screen, encode_utf_8(data));
#else
int charset = driver->charsets[!!border];
add_to_string(screen, cp2utf_8(charset, data));
#endif /* CONFIG_UTF_8 */
return;
}
add_char_to_string(screen, (unsigned char)data);
}
/* Time critical section. */
static inline void
add_char16(struct string *screen, struct screen_driver *driver,
struct screen_char *ch, struct screen_state *state)
{
unsigned char border = (ch->attr & SCREEN_ATTR_FRAME);
unsigned char underline = (ch->attr & SCREEN_ATTR_UNDERLINE);
unsigned char bold = (ch->attr & SCREEN_ATTR_BOLD);
if (
#ifdef CONFIG_UTF_8
(!use_utf8_io(driver) || ch->data != UCS_NO_CHAR) &&
#endif /* CONFIG_UTF_8 */
border != state->border && driver->frame_seqs
) {
state->border = border;
add_term_string(screen, driver->frame_seqs[!!border]);
}
if (
#ifdef CONFIG_UTF_8
(!use_utf8_io(driver) || ch->data != UCS_NO_CHAR) &&
#endif /* CONFIG_UTF_8 */
underline != state->underline && driver->underline
) {
state->underline = underline;
add_term_string(screen, driver->underline[!!underline]);
}
if (
#ifdef CONFIG_UTF_8
(!use_utf8_io(driver) || ch->data != UCS_NO_CHAR) &&
#endif /* CONFIG_UTF_8 */
bold != state->bold
) {
state->bold = bold;
if (bold) {
add_bytes_to_string(screen, "\033[1m", 4);
} else {
/* Force repainting of the other attributes. */
state->color[0] = ch->color[0] + 1;
}
}
if (
#ifdef CONFIG_UTF_8
(!use_utf8_io(driver) || ch->data != UCS_NO_CHAR) &&
#endif /* CONFIG_UTF_8 */
!compare_color(ch->color, state->color)
) {
copy_color(state->color, ch->color);
add_bytes_to_string(screen, "\033[0", 3);
if (driver->color_mode == COLOR_MODE_16) {
unsigned char code[6] = ";30;40";
unsigned char bgcolor = TERM_COLOR_BACKGROUND(ch->color);
code[2] += TERM_COLOR_FOREGROUND(ch->color);
if (!driver->transparent || bgcolor != 0) {
code[5] += bgcolor;
add_bytes_to_string(screen, code, 6);
} else {
add_bytes_to_string(screen, code, 3);
}
} else if (ch->attr & SCREEN_ATTR_STANDOUT) {
/* Flip the fore- and background colors for highlighing
* purposes. */
add_bytes_to_string(screen, ";7", 2);
}
if (underline && driver->underline) {
add_bytes_to_string(screen, ";4", 2);
}
/* Check if the char should be rendered bold. */
if (bold) {
add_bytes_to_string(screen, ";1", 2);
}
add_bytes_to_string(screen, "m", 1);
}
add_char_data(screen, driver, ch->data, border);
}
#if defined(CONFIG_88_COLORS) || defined(CONFIG_256_COLORS)
static struct string color256_seqs[] = {
/* foreground: */ TERM_STRING("\033[0;38;5;%dm"),
/* background: */ TERM_STRING("\033[48;5;%dm"),
};
static inline void
add_char_color(struct string *screen, struct string *seq, unsigned char color)
{
unsigned char color_buf[3];
unsigned char *color_pos = color_buf;
int seq_pos = 0;
int color_len = 1;
check_string_magic(seq);
for (; seq->source[seq_pos] != '%'; seq_pos++) ;
add_bytes_to_string(screen, seq->source, seq_pos);
if (color < 10) {
color_pos += 2;
} else {
int color2;
++color_len;
if (color < 100) {
++color_pos;
} else {
++color_len;
if (color < 200) {
color_buf[0] = '1';
color -= 100;
} else {
color_buf[0] = '2';
color -= 200;
}
}
color2 = (color % 10);
color /= 10;
color_buf[1] = '0' + color;
color = color2;
}
color_buf[2] = '0' + color;
add_bytes_to_string(screen, color_pos, color_len);
seq_pos += 2; /* Skip "%d" */
add_bytes_to_string(screen, &seq->source[seq_pos], seq->length - seq_pos);
}
#define add_background_color(str, seq, chr) add_char_color(str, &(seq)[1], (chr)->color[1])
#define add_foreground_color(str, seq, chr) add_char_color(str, &(seq)[0], (chr)->color[0])
/* Time critical section. */
static inline void
add_char256(struct string *screen, struct screen_driver *driver,
struct screen_char *ch, struct screen_state *state)
{
unsigned char attr_delta = (ch->attr ^ state->attr);
if (
#ifdef CONFIG_UTF_8
(!use_utf8_io(driver) || ch->data != UCS_NO_CHAR) &&
#endif /* CONFIG_UTF_8 */
attr_delta
) {
if ((attr_delta & SCREEN_ATTR_FRAME) && driver->frame_seqs) {
state->border = !!(ch->attr & SCREEN_ATTR_FRAME);
add_term_string(screen, driver->frame_seqs[state->border]);
}
if ((attr_delta & SCREEN_ATTR_UNDERLINE) && driver->underline) {
state->underline = !!(ch->attr & SCREEN_ATTR_UNDERLINE);
add_term_string(screen, driver->underline[state->underline]);
}
if (attr_delta & SCREEN_ATTR_BOLD) {
if (ch->attr & SCREEN_ATTR_BOLD) {
add_bytes_to_string(screen, "\033[1m", 4);
} else {
/* Force repainting of the other attributes. */
state->color[0] = ch->color[0] + 1;
}
}
state->attr = ch->attr;
}
if (
#ifdef CONFIG_UTF_8
(!use_utf8_io(driver) || ch->data != UCS_NO_CHAR) &&
#endif /* CONFIG_UTF_8 */
!compare_color(ch->color, state->color)
) {
copy_color(state->color, ch->color);
add_foreground_color(screen, color256_seqs, ch);
if (!driver->transparent || ch->color[1] != 0) {
add_background_color(screen, color256_seqs, ch);
}
if (ch->attr & SCREEN_ATTR_BOLD)
add_bytes_to_string(screen, "\033[1m", 4);
if (ch->attr & SCREEN_ATTR_UNDERLINE && driver->underline) {
state->underline = !!(ch->attr & SCREEN_ATTR_UNDERLINE);
add_term_string(screen, driver->underline[state->underline]);
}
}
add_char_data(screen, driver, ch->data, ch->attr & SCREEN_ATTR_FRAME);
}
#endif
#define add_chars(image_, term_, driver_, state_, ADD_CHAR) \
{ \
struct terminal_screen *screen = (term_)->screen; \
int y = screen->dirty_from; \
int ypos = y * (term_)->width; \
int prev_y = -1; \
int xmax = (term_)->width - 1; \
int ymax = (term_)->height - 1; \
struct screen_char *current = &screen->last_image[ypos]; \
struct screen_char *pos = &screen->image[ypos]; \
struct screen_char *prev_pos = NULL; /* Warning prevention. */ \
\
int_upper_bound(&screen->dirty_to, ymax); \
\
for (; y <= screen->dirty_to; y++) { \
int is_last_line = (y == ymax); \
int x = 0; \
\
for (; x <= xmax; x++, current++, pos++) { \
/* Workaround for terminals without
* "eat_newline_glitch (xn)", e.g., the cons25 family
* of terminals and cygwin terminal.
* It prevents display distortion, but char at bottom
* right of terminal will not be drawn.
* A better fix would be to correctly detects
* terminal type, and/or add a terminal option for
* this purpose. */ \
\
if (is_last_line && x == xmax) \
break; \
\
if (compare_bg_color(pos->color, current->color)) { \
/* No update for exact match. */ \
if (compare_fg_color(pos->color, current->color)\
&& pos->data == current->data \
&& pos->attr == current->attr) \
continue; \
\
/* Else if the color match and the data is
* ``space''. */ \
if (pos->data <= ' ' && current->data <= ' ' \
&& pos->attr == current->attr) \
continue; \
} \
\
/* Move the cursor when @prev_pos is more than 10 chars
* away. */ \
if (prev_y != y || prev_pos + 10 <= pos) { \
add_cursor_move_to_string(image_, y + 1, x + 1);\
prev_pos = pos; \
prev_y = y; \
} \
\
for (; prev_pos <= pos ; prev_pos++) \
ADD_CHAR(image_, driver_, prev_pos, state_); \
} \
} \
}
/* Updating of the terminal screen is done by checking what needs to be updated
* using the last screen. */
void
redraw_screen(struct terminal *term)
{
struct screen_driver *driver;
struct string image;
struct screen_state state = INIT_SCREEN_STATE;
struct terminal_screen *screen = term->screen;
if (!screen || screen->dirty_from > screen->dirty_to) return;
if (term->master && is_blocked()) return;
driver = get_screen_driver(term);
if (!driver) return;
if (!init_string(&image)) return;
switch (driver->color_mode) {
case COLOR_MODE_MONO:
case COLOR_MODE_16:
add_chars(&image, term, driver, &state, add_char16);
break;
#ifdef CONFIG_88_COLORS
case COLOR_MODE_88:
add_chars(&image, term, driver, &state, add_char256);
break;
#endif
#ifdef CONFIG_256_COLORS
case COLOR_MODE_256:
add_chars(&image, term, driver, &state, add_char256);
break;
#endif
case COLOR_MODES:
case COLOR_MODE_DUMP:
default:
INTERNAL("Invalid color mode (%d).", driver->color_mode);
return;
}
if (image.length) {
if (driver->color_mode)
add_bytes_to_string(&image, "\033[37;40m", 8);
add_bytes_to_string(&image, "\033[0m", 4);
/* If we ended in border state end the frame mode. */
if (state.border && driver->frame_seqs)
add_term_string(&image, driver->frame_seqs[0]);
}
/* Even if nothing was redrawn, we possibly still need to move
* cursor. */
if (image.length
|| screen->cx != screen->lcx
|| screen->cy != screen->lcy) {
screen->lcx = screen->cx;
screen->lcy = screen->cy;
add_cursor_move_to_string(&image, screen->cy + 1,
screen->cx + 1);
}
if (image.length) {
if (term->master) want_draw();
hard_write(term->fdout, image.source, image.length);
if (term->master) done_draw();
}
done_string(&image);
copy_screen_chars(screen->last_image, screen->image, term->width * term->height);
screen->dirty_from = term->height;
screen->dirty_to = 0;
}
void
erase_screen(struct terminal *term)
{
if (term->master) {
if (is_blocked()) return;
want_draw();
}
hard_write(term->fdout, "\033[2J\033[1;1H", 10);
if (term->master) done_draw();
}
void
beep_terminal(struct terminal *term)
{
#ifdef CONFIG_OS_WIN32
MessageBeep(MB_ICONEXCLAMATION);
#else
hard_write(term->fdout, "\a", 1);
#endif
}
struct terminal_screen *
init_screen(void)
{
struct terminal_screen *screen;
screen = mem_calloc(1, sizeof(*screen));
if (!screen) return NULL;
screen->lcx = -1;
screen->lcy = -1;
return screen;
}
/* The two images are allocated in one chunk. */
/* TODO: It seems allocation failure here is fatal. We should do something! */
void
resize_screen(struct terminal *term, int width, int height)
{
struct terminal_screen *screen;
struct screen_char *image;
size_t size, bsize;
assert(term && term->screen);
screen = term->screen;
assert(width >= 0);
assert(height >= 0);
size = width * height;
if (size <= 0) return;
bsize = size * sizeof(*image);
image = mem_realloc(screen->image, bsize * 2);
if (!image) return;
screen->image = image;
screen->last_image = image + size;
memset(screen->image, 0, bsize);
memset(screen->last_image, 0xFF, bsize);
term->width = width;
term->height = height;
set_screen_dirty(screen, 0, height);
}
void
done_screen(struct terminal_screen *screen)
{
mem_free_if(screen->image);
mem_free(screen);
}
struct module terminal_screen_module = struct_module(
/* name: */ "Terminal Screen",
/* options: */ NULL,
/* hooks: */ NULL,
/* submodules: */ NULL,
/* data: */ NULL,
/* init: */ NULL,
/* done: */ done_screen_drivers
);