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weston/clients/terminal.c

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/*
* Copyright © 2008 Kristian Høgsberg
*
* Permission to use, copy, modify, distribute, and sell this software and its
* documentation for any purpose is hereby granted without fee, provided that
* the above copyright notice appear in all copies and that both that copyright
* notice and this permission notice appear in supporting documentation, and
* that the name of the copyright holders not be used in advertising or
* publicity pertaining to distribution of the software without specific,
* written prior permission. The copyright holders make no representations
* about the suitability of this software for any purpose. It is provided "as
* is" without express or implied warranty.
*
* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
* OF THIS SOFTWARE.
*/
#include <stdint.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <math.h>
#include <time.h>
#include <pty.h>
#include <ctype.h>
#include <cairo.h>
#include <glib.h>
#include <sys/epoll.h>
#include <X11/keysym.h>
#include <wayland-client.h>
#include "window.h"
static int option_fullscreen;
#define MOD_SHIFT 0x01
#define MOD_ALT 0x02
#define MOD_CTRL 0x04
#define ATTRMASK_BOLD 0x01
#define ATTRMASK_UNDERLINE 0x02
#define ATTRMASK_BLINK 0x04
#define ATTRMASK_INVERSE 0x08
#define ATTRMASK_CONCEALED 0x10
/* Buffer sizes */
#define MAX_RESPONSE 256
#define MAX_ESCAPE 255
/* Terminal modes */
#define MODE_SHOW_CURSOR 0x00000001
#define MODE_INVERSE 0x00000002
#define MODE_AUTOWRAP 0x00000004
#define MODE_AUTOREPEAT 0x00000008
#define MODE_LF_NEWLINE 0x00000010
#define MODE_IRM 0x00000020
#define MODE_DELETE_SENDS_DEL 0x00000040
#define MODE_ALT_SENDS_ESC 0x00000080
union utf8_char {
unsigned char byte[4];
uint32_t ch;
};
enum utf8_state {
utf8state_start,
utf8state_accept,
utf8state_reject,
utf8state_expect3,
utf8state_expect2,
utf8state_expect1
};
struct utf8_state_machine {
enum utf8_state state;
int len;
union utf8_char s;
};
static void
init_state_machine(struct utf8_state_machine *machine)
{
machine->state = utf8state_start;
machine->len = 0;
machine->s.ch = 0;
}
static enum utf8_state
utf8_next_char(struct utf8_state_machine *machine, unsigned char c)
{
switch(machine->state) {
case utf8state_start:
case utf8state_accept:
case utf8state_reject:
machine->s.ch = 0;
machine->len = 0;
if(c == 0xC0 || c == 0xC1) {
/* overlong encoding, reject */
machine->state = utf8state_reject;
} else if((c & 0x80) == 0) {
/* single byte, accept */
machine->s.byte[machine->len++] = c;
machine->state = utf8state_accept;
} else if((c & 0xC0) == 0x80) {
/* parser out of sync, ignore byte */
machine->state = utf8state_start;
} else if((c & 0xE0) == 0xC0) {
/* start of two byte sequence */
machine->s.byte[machine->len++] = c;
machine->state = utf8state_expect1;
} else if((c & 0xF0) == 0xE0) {
/* start of three byte sequence */
machine->s.byte[machine->len++] = c;
machine->state = utf8state_expect2;
} else if((c & 0xF8) == 0xF0) {
/* start of four byte sequence */
machine->s.byte[machine->len++] = c;
machine->state = utf8state_expect3;
} else {
/* overlong encoding, reject */
machine->state = utf8state_reject;
}
break;
case utf8state_expect3:
machine->s.byte[machine->len++] = c;
if((c & 0xC0) == 0x80) {
/* all good, continue */
machine->state = utf8state_expect2;
} else {
/* missing extra byte, reject */
machine->state = utf8state_reject;
}
break;
case utf8state_expect2:
machine->s.byte[machine->len++] = c;
if((c & 0xC0) == 0x80) {
/* all good, continue */
machine->state = utf8state_expect1;
} else {
/* missing extra byte, reject */
machine->state = utf8state_reject;
}
break;
case utf8state_expect1:
machine->s.byte[machine->len++] = c;
if((c & 0xC0) == 0x80) {
/* all good, accept */
machine->state = utf8state_accept;
} else {
/* missing extra byte, reject */
machine->state = utf8state_reject;
}
break;
default:
machine->state = utf8state_reject;
break;
}
return machine->state;
}
struct char_sub {
union utf8_char match;
union utf8_char replace;
};
/* Set last char_sub match to NULL char */
typedef struct char_sub *character_set;
struct char_sub CS_US[] = {
{{{0, }}, {{0, }}}
};
static struct char_sub CS_UK[] = {
{{{'#', 0, }}, {{0xC2, 0xA3, 0, }}},
{{{0, }}, {{0, }}}
};
static struct char_sub CS_SPECIAL[] = {
{{{'`', 0, }}, {{0xE2, 0x99, 0xA6, 0}}}, /* diamond */
{{{'a', 0, }}, {{0xE2, 0x96, 0x92, 0}}}, /* 50% cell */
{{{'b', 0, }}, {{0xE2, 0x90, 0x89, 0}}}, /* HT */
{{{'c', 0, }}, {{0xE2, 0x90, 0x8C, 0}}}, /* FF */
{{{'d', 0, }}, {{0xE2, 0x90, 0x8D, 0}}}, /* CR */
{{{'e', 0, }}, {{0xE2, 0x90, 0x8A, 0}}}, /* LF */
{{{'f', 0, }}, {{0xC2, 0xB0, 0, }}}, /* Degree */
{{{'g', 0, }}, {{0xC2, 0xB1, 0, }}}, /* Plus/Minus */
{{{'h', 0, }}, {{0xE2, 0x90, 0xA4, 0}}}, /* NL */
{{{'i', 0, }}, {{0xE2, 0x90, 0x8B, 0}}}, /* VT */
{{{'j', 0, }}, {{0xE2, 0x94, 0x98, 0}}}, /* CN_RB */
{{{'k', 0, }}, {{0xE2, 0x94, 0x90, 0}}}, /* CN_RT */
{{{'l', 0, }}, {{0xE2, 0x94, 0x8C, 0}}}, /* CN_LT */
{{{'m', 0, }}, {{0xE2, 0x94, 0x94, 0}}}, /* CN_RB */
{{{'n', 0, }}, {{0xE2, 0x94, 0xBC, 0}}}, /* CROSS */
{{{'o', 0, }}, {{0xE2, 0x94, 0x80, 0}}}, /* H */
{{{'p', 0, }}, {{0xE2, 0x94, 0x80, 0}}}, /* H */
{{{'q', 0, }}, {{0xE2, 0x94, 0x80, 0}}}, /* H */
{{{'r', 0, }}, {{0xE2, 0x94, 0x80, 0}}}, /* H */
{{{'s', 0, }}, {{0xE2, 0x94, 0x80, 0}}}, /* H */
{{{'t', 0, }}, {{0xE2, 0x94, 0x9C, 0}}}, /* TR */
{{{'u', 0, }}, {{0xE2, 0x94, 0xA4, 0}}}, /* TL */
{{{'v', 0, }}, {{0xE2, 0x94, 0xB4, 0}}}, /* TU */
{{{'w', 0, }}, {{0xE2, 0x94, 0xAC, 0}}}, /* TD */
{{{'x', 0, }}, {{0xE2, 0x94, 0x82, 0}}}, /* V */
{{{'y', 0, }}, {{0xE2, 0x89, 0xA4, 0}}}, /* LE */
{{{'z', 0, }}, {{0xE2, 0x89, 0xA5, 0}}}, /* GE */
{{{'{', 0, }}, {{0xCF, 0x80, 0, }}}, /* PI */
{{{'|', 0, }}, {{0xE2, 0x89, 0xA0, 0}}}, /* NEQ */
{{{'}', 0, }}, {{0xC2, 0xA3, 0, }}}, /* POUND */
{{{'~', 0, }}, {{0xE2, 0x8B, 0x85, 0}}}, /* DOT */
{{{0, }}, {{0, }}}
};
static void
apply_char_set(character_set cs, union utf8_char *utf8)
{
int i = 0;
while (cs[i].match.byte[0]) {
if ((*utf8).ch == cs[i].match.ch) {
*utf8 = cs[i].replace;
break;
}
i++;
}
}
struct key_map {
int sym;
int num;
char escape;
char code;
};
/* Set last key_sub sym to NULL */
typedef struct key_map *keyboard_mode;
static struct key_map KM_NORMAL[] = {
{XK_Left, 1, '[', 'D'},
{XK_Right, 1, '[', 'C'},
{XK_Up, 1, '[', 'A'},
{XK_Down, 1, '[', 'B'},
{XK_Home, 1, '[', 'H'},
{XK_End, 1, '[', 'F'},
{0, 0, 0, 0}
};
static struct key_map KM_APPLICATION[] = {
{XK_Left, 1, 'O', 'D'},
{XK_Right, 1, 'O', 'C'},
{XK_Up, 1, 'O', 'A'},
{XK_Down, 1, 'O', 'B'},
{XK_Home, 1, 'O', 'H'},
{XK_End, 1, 'O', 'F'},
{XK_KP_Enter, 1, 'O', 'M'},
{XK_KP_Multiply, 1, 'O', 'j'},
{XK_KP_Add, 1, 'O', 'k'},
{XK_KP_Separator, 1, 'O', 'l'},
{XK_KP_Subtract, 1, 'O', 'm'},
{XK_KP_Divide, 1, 'O', 'o'},
{0, 0, 0, 0}
};
static int
function_key_response(char escape, int num, uint32_t modifiers,
char code, char *response)
{
int mod_num = 0;
int len;
if (modifiers & MOD_SHIFT_MASK) mod_num |= 1;
if (modifiers & MOD_ALT_MASK) mod_num |= 2;
if (modifiers & MOD_CONTROL_MASK) mod_num |= 4;
if (mod_num != 0)
len = snprintf(response, MAX_RESPONSE, "\e[%d;%d%c",
num, mod_num + 1, code);
else if (code != '~')
len = snprintf(response, MAX_RESPONSE, "\e%c%c",
escape, code);
else
len = snprintf(response, MAX_RESPONSE, "\e%c%d%c",
escape, num, code);
if (len >= MAX_RESPONSE) return MAX_RESPONSE - 1;
else return len;
}
/* returns the number of bytes written into response,
* which must have room for MAX_RESPONSE bytes */
static int
apply_key_map(keyboard_mode mode, int sym, uint32_t modifiers, char *response)
{
struct key_map map;
int len = 0;
int i = 0;
while (mode[i].sym) {
map = mode[i++];
if (sym == map.sym) {
len = function_key_response(map.escape, map.num,
modifiers, map.code,
response);
break;
}
}
return len;
}
struct terminal_color { double r, g, b, a; };
struct attr {
unsigned char fg, bg;
char a; /* attributes format:
* 76543210
* cilub */
char s; /* in selection */
};
struct color_scheme {
struct terminal_color palette[16];
char border;
struct attr default_attr;
};
static void
attr_init(struct attr *data_attr, struct attr attr, int n)
{
int i;
for (i = 0; i < n; i++) {
data_attr[i] = attr;
}
}
enum escape_state {
escape_state_normal = 0,
escape_state_escape,
escape_state_dcs,
escape_state_csi,
escape_state_osc,
escape_state_inner_escape,
escape_state_ignore,
escape_state_special
};
#define ESC_FLAG_WHAT 0x01
#define ESC_FLAG_GT 0x02
#define ESC_FLAG_BANG 0x04
#define ESC_FLAG_CASH 0x08
#define ESC_FLAG_SQUOTE 0x10
#define ESC_FLAG_DQUOTE 0x20
#define ESC_FLAG_SPACE 0x40
struct terminal {
struct window *window;
struct widget *widget;
struct display *display;
union utf8_char *data;
struct task io_task;
char *tab_ruler;
struct attr *data_attr;
struct attr curr_attr;
uint32_t mode;
char origin_mode;
char saved_origin_mode;
struct attr saved_attr;
union utf8_char last_char;
int margin_top, margin_bottom;
character_set cs, g0, g1;
character_set saved_cs, saved_g0, saved_g1;
keyboard_mode key_mode;
int data_pitch, attr_pitch; /* The width in bytes of a line */
int width, height, start, row, column;
int saved_row, saved_column;
int fd, master;
uint32_t modifiers;
char escape[MAX_ESCAPE+1];
int escape_length;
enum escape_state state;
enum escape_state outer_state;
int escape_flags;
struct utf8_state_machine state_machine;
int margin;
int fullscreen;
int focused;
struct color_scheme *color_scheme;
struct terminal_color color_table[256];
cairo_font_extents_t extents;
cairo_scaled_font_t *font_normal, *font_bold;
struct wl_data_source *selection;
int32_t dragging;
int selection_start_x, selection_start_y;
int selection_end_x, selection_end_y;
};
/* Create default tab stops, every 8 characters */
static void
terminal_init_tabs(struct terminal *terminal)
{
int i = 0;
while (i < terminal->width) {
if (i % 8 == 0)
terminal->tab_ruler[i] = 1;
else
terminal->tab_ruler[i] = 0;
i++;
}
}
static void
terminal_init(struct terminal *terminal)
{
terminal->curr_attr = terminal->color_scheme->default_attr;
terminal->origin_mode = 0;
terminal->mode = MODE_SHOW_CURSOR |
MODE_AUTOREPEAT |
MODE_ALT_SENDS_ESC |
MODE_AUTOWRAP;
terminal->row = 0;
terminal->column = 0;
terminal->g0 = CS_US;
terminal->g1 = CS_US;
terminal->cs = terminal->g0;
terminal->key_mode = KM_NORMAL;
terminal->saved_g0 = terminal->g0;
terminal->saved_g1 = terminal->g1;
terminal->saved_cs = terminal->cs;
terminal->saved_attr = terminal->curr_attr;
terminal->saved_origin_mode = terminal->origin_mode;
terminal->saved_row = terminal->row;
terminal->saved_column = terminal->column;
if (terminal->tab_ruler != NULL) terminal_init_tabs(terminal);
}
static void
init_color_table(struct terminal *terminal)
{
int c, r;
struct terminal_color *color_table = terminal->color_table;
for (c = 0; c < 256; c ++) {
if (c < 16) {
color_table[c] = terminal->color_scheme->palette[c];
} else if (c < 232) {
r = c - 16;
color_table[c].b = ((double)(r % 6) / 6.0); r /= 6;
color_table[c].g = ((double)(r % 6) / 6.0); r /= 6;
color_table[c].r = ((double)(r % 6) / 6.0);
color_table[c].a = 1.0;
} else {
r = (c - 232) * 10 + 8;
color_table[c].r = ((double) r) / 256.0;
color_table[c].g = color_table[c].r;
color_table[c].b = color_table[c].r;
color_table[c].a = 1.0;
}
}
}
static union utf8_char *
terminal_get_row(struct terminal *terminal, int row)
{
int index;
index = (row + terminal->start) % terminal->height;
return &terminal->data[index * terminal->width];
}
static struct attr*
terminal_get_attr_row(struct terminal *terminal, int row)
{
int index;
index = (row + terminal->start) % terminal->height;
return &terminal->data_attr[index * terminal->width];
}
union decoded_attr {
struct attr attr;
uint32_t key;
};
static int
terminal_compare_position(struct terminal *terminal,
int x, int y, int32_t ref_row, int32_t ref_col)
{
struct rectangle allocation;
int top_margin, side_margin, col, row, ref_x;
widget_get_allocation(terminal->widget, &allocation);
side_margin = allocation.x + (allocation.width - terminal->width * terminal->extents.max_x_advance) / 2;
top_margin = allocation.y + (allocation.height - terminal->height * terminal->extents.height) / 2;
col = (x - side_margin) / terminal->extents.max_x_advance;
row = (y - top_margin) / terminal->extents.height;
ref_x = side_margin + ref_col * terminal->extents.max_x_advance +
terminal->extents.max_x_advance / 2;
if (row < ref_row)
return -1;
if (row == ref_row) {
if (col < ref_col)
return -1;
if (col == ref_col && x < ref_x)
return -1;
}
return 1;
}
static void
terminal_decode_attr(struct terminal *terminal, int row, int col,
union decoded_attr *decoded)
{
struct attr attr;
int foreground, background, tmp;
int start_cmp, end_cmp;
start_cmp =
terminal_compare_position(terminal,
terminal->selection_start_x,
terminal->selection_start_y,
row, col);
end_cmp =
terminal_compare_position(terminal,
terminal->selection_end_x,
terminal->selection_end_y,
row, col);
decoded->attr.s = 0;
if (start_cmp < 0 && end_cmp > 0)
decoded->attr.s = 1;
else if (end_cmp < 0 && start_cmp > 0)
decoded->attr.s = 1;
/* get the attributes for this character cell */
attr = terminal_get_attr_row(terminal, row)[col];
if ((attr.a & ATTRMASK_INVERSE) ||
decoded->attr.s ||
((terminal->mode & MODE_SHOW_CURSOR) &&
terminal->focused && terminal->row == row &&
terminal->column == col)) {
foreground = attr.bg;
background = attr.fg;
if (attr.a & ATTRMASK_BOLD) {
if (foreground <= 16) foreground |= 0x08;
if (background <= 16) background &= 0x07;
}
} else {
foreground = attr.fg;
background = attr.bg;
}
if (terminal->mode & MODE_INVERSE) {
tmp = foreground;
foreground = background;
background = tmp;
if (attr.a & ATTRMASK_BOLD) {
if (foreground <= 16) foreground |= 0x08;
if (background <= 16) background &= 0x07;
}
}
decoded->attr.fg = foreground;
decoded->attr.bg = background;
decoded->attr.a = attr.a;
}
static void
terminal_scroll_buffer(struct terminal *terminal, int d)
{
int i;
d = d % (terminal->height + 1);
terminal->start = (terminal->start + d) % terminal->height;
if (terminal->start < 0) terminal->start = terminal->height + terminal->start;
if(d < 0) {
d = 0 - d;
for(i = 0; i < d; i++) {
memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
attr_init(terminal_get_attr_row(terminal, i),
terminal->curr_attr, terminal->width);
}
} else {
for(i = terminal->height - d; i < terminal->height; i++) {
memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
attr_init(terminal_get_attr_row(terminal, i),
terminal->curr_attr, terminal->width);
}
}
}
static void
terminal_scroll_window(struct terminal *terminal, int d)
{
int i;
int window_height;
int from_row, to_row;
// scrolling range is inclusive
window_height = terminal->margin_bottom - terminal->margin_top + 1;
d = d % (window_height + 1);
if(d < 0) {
d = 0 - d;
to_row = terminal->margin_bottom;
from_row = terminal->margin_bottom - d;
for (i = 0; i < (window_height - d); i++) {
memcpy(terminal_get_row(terminal, to_row - i),
terminal_get_row(terminal, from_row - i),
terminal->data_pitch);
memcpy(terminal_get_attr_row(terminal, to_row - i),
terminal_get_attr_row(terminal, from_row - i),
terminal->attr_pitch);
}
for (i = terminal->margin_top; i < (terminal->margin_top + d); i++) {
memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
attr_init(terminal_get_attr_row(terminal, i),
terminal->curr_attr, terminal->width);
}
} else {
to_row = terminal->margin_top;
from_row = terminal->margin_top + d;
for (i = 0; i < (window_height - d); i++) {
memcpy(terminal_get_row(terminal, to_row + i),
terminal_get_row(terminal, from_row + i),
terminal->data_pitch);
memcpy(terminal_get_attr_row(terminal, to_row + i),
terminal_get_attr_row(terminal, from_row + i),
terminal->attr_pitch);
}
for (i = terminal->margin_bottom - d + 1; i <= terminal->margin_bottom; i++) {
memset(terminal_get_row(terminal, i), 0, terminal->data_pitch);
attr_init(terminal_get_attr_row(terminal, i),
terminal->curr_attr, terminal->width);
}
}
}
static void
terminal_scroll(struct terminal *terminal, int d)
{
if(terminal->margin_top == 0 && terminal->margin_bottom == terminal->height - 1)
terminal_scroll_buffer(terminal, d);
else
terminal_scroll_window(terminal, d);
}
static void
terminal_shift_line(struct terminal *terminal, int d)
{
union utf8_char *row;
struct attr *attr_row;
row = terminal_get_row(terminal, terminal->row);
attr_row = terminal_get_attr_row(terminal, terminal->row);
if ((terminal->width + d) <= terminal->column)
d = terminal->column + 1 - terminal->width;
if ((terminal->column + d) >= terminal->width)
d = terminal->width - terminal->column - 1;
if (d < 0) {
d = 0 - d;
memmove(&row[terminal->column],
&row[terminal->column + d],
(terminal->width - terminal->column - d) * sizeof(union utf8_char));
memmove(&attr_row[terminal->column], &attr_row[terminal->column + d],
(terminal->width - terminal->column - d) * sizeof(struct attr));
memset(&row[terminal->width - d], 0, d * sizeof(union utf8_char));
attr_init(&attr_row[terminal->width - d], terminal->curr_attr, d);
} else {
memmove(&row[terminal->column + d], &row[terminal->column],
(terminal->width - terminal->column - d) * sizeof(union utf8_char));
memmove(&attr_row[terminal->column + d], &attr_row[terminal->column],
(terminal->width - terminal->column - d) * sizeof(struct attr));
memset(&row[terminal->column], 0, d * sizeof(union utf8_char));
attr_init(&attr_row[terminal->column], terminal->curr_attr, d);
}
}
static void
terminal_resize_cells(struct terminal *terminal, int width, int height)
{
size_t size;
union utf8_char *data;
struct attr *data_attr;
char *tab_ruler;
int data_pitch, attr_pitch;
int i, l, total_rows;
struct rectangle allocation;
struct winsize ws;
if (width < 1)
width = 1;
if (height < 1)
height = 1;
if (terminal->width == width && terminal->height == height)
return;
data_pitch = width * sizeof(union utf8_char);
size = data_pitch * height;
data = malloc(size);
attr_pitch = width * sizeof(struct attr);
data_attr = malloc(attr_pitch * height);
tab_ruler = malloc(width);
memset(data, 0, size);
memset(tab_ruler, 0, width);
attr_init(data_attr, terminal->curr_attr, width * height);
if (terminal->data && terminal->data_attr) {
if (width > terminal->width)
l = terminal->width;
else
l = width;
if (terminal->height > height) {
total_rows = height;
} else {
total_rows = terminal->height;
}
for (i = 0; i < total_rows; i++) {
memcpy(&data[width * i],
terminal_get_row(terminal, i),
l * sizeof(union utf8_char));
memcpy(&data_attr[width * i],
terminal_get_attr_row(terminal, i),
l * sizeof(struct attr));
}
free(terminal->data);
free(terminal->data_attr);
free(terminal->tab_ruler);
}
terminal->data_pitch = data_pitch;
terminal->attr_pitch = attr_pitch;
terminal->margin_bottom =
height - (terminal->height - terminal->margin_bottom);
terminal->width = width;
terminal->height = height;
terminal->data = data;
terminal->data_attr = data_attr;
terminal->tab_ruler = tab_ruler;
terminal_init_tabs(terminal);
/* Update the window size */
ws.ws_row = terminal->height;
ws.ws_col = terminal->width;
widget_get_allocation(terminal->widget, &allocation);
ws.ws_xpixel = allocation.width;
ws.ws_ypixel = allocation.height;
ioctl(terminal->master, TIOCSWINSZ, &ws);
}
static void
resize_handler(struct widget *widget,
int32_t width, int32_t height, void *data)
{
struct terminal *terminal = data;
int32_t columns, rows, m;
m = 2 * terminal->margin;
columns = (width - m) / (int32_t) terminal->extents.max_x_advance;
rows = (height - m) / (int32_t) terminal->extents.height;
if (!terminal->fullscreen) {
width = columns * terminal->extents.max_x_advance + m;
height = rows * terminal->extents.height + m;
widget_set_size(terminal->widget, width, height);
}
terminal_resize_cells(terminal, columns, rows);
}
static void
terminal_resize(struct terminal *terminal, int columns, int rows)
{
int32_t width, height, m;
if (terminal->fullscreen)
return;
m = 2 * terminal->margin;
width = columns * terminal->extents.max_x_advance + m;
height = rows * terminal->extents.height + m;
widget_schedule_resize(terminal->widget, width, height);
}
struct color_scheme DEFAULT_COLORS = {
{
{0, 0, 0, 1}, /* black */
{0.66, 0, 0, 1}, /* red */
{0 , 0.66, 0, 1}, /* green */
{0.66, 0.33, 0, 1}, /* orange (nicer than muddy yellow) */
{0 , 0 , 0.66, 1}, /* blue */
{0.66, 0 , 0.66, 1}, /* magenta */
{0, 0.66, 0.66, 1}, /* cyan */
{0.66, 0.66, 0.66, 1}, /* light grey */
{0.22, 0.33, 0.33, 1}, /* dark grey */
{1, 0.33, 0.33, 1}, /* high red */
{0.33, 1, 0.33, 1}, /* high green */
{1, 1, 0.33, 1}, /* high yellow */
{0.33, 0.33, 1, 1}, /* high blue */
{1, 0.33, 1, 1}, /* high magenta */
{0.33, 1, 1, 1}, /* high cyan */
{1, 1, 1, 1} /* white */
},
0, /* black border */
{7, 0, 0, } /* bg:black (0), fg:light gray (7) */
};
static void
terminal_set_color(struct terminal *terminal, cairo_t *cr, int index)
{
cairo_set_source_rgba(cr,
terminal->color_table[index].r,
terminal->color_table[index].g,
terminal->color_table[index].b,
terminal->color_table[index].a);
}
static void
terminal_send_selection(struct terminal *terminal, int fd)
{
int row, col;
union utf8_char *p_row;
union decoded_attr attr;
FILE *fp;
int len;
fp = fdopen(fd, "w");
for (row = 0; row < terminal->height; row++) {
p_row = terminal_get_row(terminal, row);
for (col = 0; col < terminal->width; col++) {
/* get the attributes for this character cell */
terminal_decode_attr(terminal, row, col, &attr);
if (!attr.attr.s)
continue;
len = strnlen((char *) p_row[col].byte, 4);
fwrite(p_row[col].byte, 1, len, fp);
}
}
fclose(fp);
}
struct glyph_run {
struct terminal *terminal;
cairo_t *cr;
unsigned int count;
union decoded_attr attr;
cairo_glyph_t glyphs[256], *g;
};
static void
glyph_run_init(struct glyph_run *run, struct terminal *terminal, cairo_t *cr)
{
run->terminal = terminal;
run->cr = cr;
run->g = run->glyphs;
run->count = 0;
run->attr.key = 0;
}
static void
glyph_run_flush(struct glyph_run *run, union decoded_attr attr)
{
cairo_scaled_font_t *font;
if (run->count > ARRAY_LENGTH(run->glyphs) - 10 ||
(attr.key != run->attr.key)) {
if (run->attr.attr.a & (ATTRMASK_BOLD | ATTRMASK_BLINK))
font = run->terminal->font_bold;
else
font = run->terminal->font_normal;
cairo_set_scaled_font(run->cr, font);
terminal_set_color(run->terminal, run->cr,
run->attr.attr.fg);
if (!(run->attr.attr.a & ATTRMASK_CONCEALED))
cairo_show_glyphs (run->cr, run->glyphs, run->count);
run->g = run->glyphs;
run->count = 0;
}
run->attr = attr;
}
static void
glyph_run_add(struct glyph_run *run, int x, int y, union utf8_char *c)
{
int num_glyphs;
cairo_scaled_font_t *font;
num_glyphs = ARRAY_LENGTH(run->glyphs) - run->count;
if (run->attr.attr.a & (ATTRMASK_BOLD | ATTRMASK_BLINK))
font = run->terminal->font_bold;
else
font = run->terminal->font_normal;
cairo_move_to(run->cr, x, y);
cairo_scaled_font_text_to_glyphs (font, x, y,
(char *) c->byte, 4,
&run->g, &num_glyphs,
NULL, NULL, NULL);
run->g += num_glyphs;
run->count += num_glyphs;
}
static void
redraw_handler(struct widget *widget, void *data)
{
struct terminal *terminal = data;
struct rectangle allocation;
cairo_t *cr;
int top_margin, side_margin;
int row, col;
union utf8_char *p_row;
union decoded_attr attr;
int text_x, text_y;
cairo_surface_t *surface;
double d;
struct glyph_run run;
cairo_font_extents_t extents;
surface = window_get_surface(terminal->window);
widget_get_allocation(terminal->widget, &allocation);
cr = cairo_create(surface);
cairo_rectangle(cr, allocation.x, allocation.y,
allocation.width, allocation.height);
cairo_clip(cr);
cairo_push_group(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
terminal_set_color(terminal, cr, terminal->color_scheme->border);
cairo_paint(cr);
cairo_set_scaled_font(cr, terminal->font_normal);
extents = terminal->extents;
side_margin = (allocation.width - terminal->width * extents.max_x_advance) / 2;
top_margin = (allocation.height - terminal->height * extents.height) / 2;
cairo_set_line_width(cr, 1.0);
cairo_translate(cr, allocation.x + side_margin,
allocation.y + top_margin);
/* paint the background */
for (row = 0; row < terminal->height; row++) {
for (col = 0; col < terminal->width; col++) {
/* get the attributes for this character cell */
terminal_decode_attr(terminal, row, col, &attr);
if (attr.attr.bg == terminal->color_scheme->border)
continue;
terminal_set_color(terminal, cr, attr.attr.bg);
cairo_move_to(cr, col * extents.max_x_advance,
row * extents.height);
cairo_rel_line_to(cr, extents.max_x_advance, 0);
cairo_rel_line_to(cr, 0, extents.height);
cairo_rel_line_to(cr, -extents.max_x_advance, 0);
cairo_close_path(cr);
cairo_fill(cr);
}
}
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
/* paint the foreground */
glyph_run_init(&run, terminal, cr);
for (row = 0; row < terminal->height; row++) {
p_row = terminal_get_row(terminal, row);
for (col = 0; col < terminal->width; col++) {
/* get the attributes for this character cell */
terminal_decode_attr(terminal, row, col, &attr);
glyph_run_flush(&run, attr);
text_x = col * extents.max_x_advance;
text_y = extents.ascent + row * extents.height;
if (attr.attr.a & ATTRMASK_UNDERLINE) {
terminal_set_color(terminal, cr, attr.attr.fg);
cairo_move_to(cr, text_x, (double)text_y + 1.5);
cairo_line_to(cr, text_x + extents.max_x_advance, (double) text_y + 1.5);
cairo_stroke(cr);
}
glyph_run_add(&run, text_x, text_y, &p_row[col]);
}
}
attr.key = ~0;
glyph_run_flush(&run, attr);
if ((terminal->mode & MODE_SHOW_CURSOR) && !terminal->focused) {
d = 0.5;
cairo_set_line_width(cr, 1);
cairo_move_to(cr, terminal->column * extents.max_x_advance + d,
terminal->row * extents.height + d);
cairo_rel_line_to(cr, extents.max_x_advance - 2 * d, 0);
cairo_rel_line_to(cr, 0, extents.height - 2 * d);
cairo_rel_line_to(cr, -extents.max_x_advance + 2 * d, 0);
cairo_close_path(cr);
cairo_stroke(cr);
}
cairo_pop_group_to_source(cr);
cairo_paint(cr);
cairo_destroy(cr);
cairo_surface_destroy(surface);
}
static void
terminal_write(struct terminal *terminal, const char *data, size_t length)
{
if (write(terminal->master, data, length) < 0)
abort();
}
static void
terminal_data(struct terminal *terminal, const char *data, size_t length);
static void
handle_char(struct terminal *terminal, union utf8_char utf8);
static void
handle_sgr(struct terminal *terminal, int code);
static void
handle_term_parameter(struct terminal *terminal, int code, int sr)
{
int i;
if (terminal->escape_flags & ESC_FLAG_WHAT) {
switch(code) {
case 1: /* DECCKM */
if (sr) terminal->key_mode = KM_APPLICATION;
else terminal->key_mode = KM_NORMAL;
break;
case 2: /* DECANM */
/* No VT52 support yet */
terminal->g0 = CS_US;
terminal->g1 = CS_US;
terminal->cs = terminal->g0;
break;
case 3: /* DECCOLM */
if (sr)
terminal_resize(terminal, 132, 24);
else
terminal_resize(terminal, 80, 24);
/* set columns, but also home cursor and clear screen */
terminal->row = 0; terminal->column = 0;
for (i = 0; i < terminal->height; i++) {
memset(terminal_get_row(terminal, i),
0, terminal->data_pitch);
attr_init(terminal_get_attr_row(terminal, i),
terminal->curr_attr, terminal->width);
}
break;
case 5: /* DECSCNM */
if (sr) terminal->mode |= MODE_INVERSE;
else terminal->mode &= ~MODE_INVERSE;
break;
case 6: /* DECOM */
terminal->origin_mode = sr;
if (terminal->origin_mode)
terminal->row = terminal->margin_top;
else
terminal->row = 0;
terminal->column = 0;
break;
case 7: /* DECAWM */
if (sr) terminal->mode |= MODE_AUTOWRAP;
else terminal->mode &= ~MODE_AUTOWRAP;
break;
case 8: /* DECARM */
if (sr) terminal->mode |= MODE_AUTOREPEAT;
else terminal->mode &= ~MODE_AUTOREPEAT;
break;
case 25:
if (sr) terminal->mode |= MODE_SHOW_CURSOR;
else terminal->mode &= ~MODE_SHOW_CURSOR;
break;
case 1037: /* deleteSendsDel */
if (sr) terminal->mode |= MODE_DELETE_SENDS_DEL;
else terminal->mode &= ~MODE_DELETE_SENDS_DEL;
break;
case 1039: /* altSendsEscape */
if (sr) terminal->mode |= MODE_ALT_SENDS_ESC;
else terminal->mode &= ~MODE_ALT_SENDS_ESC;
break;
default:
fprintf(stderr, "Unknown parameter: ?%d\n", code);
break;
}
} else {
switch(code) {
case 4: /* IRM */
if (sr) terminal->mode |= MODE_IRM;
else terminal->mode &= ~MODE_IRM;
break;
case 20: /* LNM */
if (sr) terminal->mode |= MODE_LF_NEWLINE;
else terminal->mode &= ~MODE_LF_NEWLINE;
break;
default:
fprintf(stderr, "Unknown parameter: %d\n", code);
break;
}
}
}
static void
handle_dcs(struct terminal *terminal)
{
}
static void
handle_osc(struct terminal *terminal)
{
char *p;
int code;
terminal->escape[terminal->escape_length++] = '\0';
p = &terminal->escape[2];
code = strtol(p, &p, 10);
if (*p == ';') p++;
switch (code) {
case 0: /* Icon name and window title */
case 1: /* Icon label */
case 2: /* Window title*/
window_set_title(terminal->window, p);
break;
default:
fprintf(stderr, "Unknown OSC escape code %d\n", code);
break;
}
}
static void
handle_escape(struct terminal *terminal)
{
union utf8_char *row;
struct attr *attr_row;
char *p;
int i, count, x, y, top, bottom;
int args[10], set[10] = { 0, };
char response[MAX_RESPONSE] = {0, };
struct rectangle allocation;
terminal->escape[terminal->escape_length++] = '\0';
i = 0;
p = &terminal->escape[2];
while ((isdigit(*p) || *p == ';') && i < 10) {
if (*p == ';') {
if (!set[i]) {
args[i] = 0;
set[i] = 1;
}
p++;
i++;
} else {
args[i] = strtol(p, &p, 10);
set[i] = 1;
}
}
switch (*p) {
case '@': /* ICH */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
terminal_shift_line(terminal, count);
break;
case 'A': /* CUU */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
if (terminal->row - count >= terminal->margin_top)
terminal->row -= count;
else
terminal->row = terminal->margin_top;
break;
case 'B': /* CUD */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
if (terminal->row + count <= terminal->margin_bottom)
terminal->row += count;
else
terminal->row = terminal->margin_bottom;
break;
case 'C': /* CUF */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
if ((terminal->column + count) < terminal->width)
terminal->column += count;
else
terminal->column = terminal->width - 1;
break;
case 'D': /* CUB */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
if ((terminal->column - count) >= 0)
terminal->column -= count;
else
terminal->column = 0;
break;
case 'E': /* CNL */
count = set[0] ? args[0] : 1;
if (terminal->row + count <= terminal->margin_bottom)
terminal->row += count;
else
terminal->row = terminal->margin_bottom;
terminal->column = 0;
break;
case 'F': /* CPL */
count = set[0] ? args[0] : 1;
if (terminal->row - count >= terminal->margin_top)
terminal->row -= count;
else
terminal->row = terminal->margin_top;
terminal->column = 0;
break;
case 'G': /* CHA */
y = set[0] ? args[0] : 1;
y = y <= 0 ? 1 : y > terminal->width ? terminal->width : y;
terminal->column = y - 1;
break;
case 'f': /* HVP */
case 'H': /* CUP */
x = (set[1] ? args[1] : 1) - 1;
x = x < 0 ? 0 :
(x >= terminal->width ? terminal->width - 1 : x);
y = (set[0] ? args[0] : 1) - 1;
if (terminal->origin_mode) {
y += terminal->margin_top;
y = y < terminal->margin_top ? terminal->margin_top :
(y > terminal->margin_bottom ? terminal->margin_bottom : y);
} else {
y = y < 0 ? 0 :
(y >= terminal->height ? terminal->height - 1 : y);
}
terminal->row = y;
terminal->column = x;
break;
case 'I': /* CHT */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
while (count > 0 && terminal->column < terminal->width) {
if (terminal->tab_ruler[terminal->column]) count--;
terminal->column++;
}
terminal->column--;
break;
case 'J': /* ED */
row = terminal_get_row(terminal, terminal->row);
attr_row = terminal_get_attr_row(terminal, terminal->row);
if (!set[0] || args[0] == 0 || args[0] > 2) {
memset(&row[terminal->column],
0, (terminal->width - terminal->column) * sizeof(union utf8_char));
attr_init(&attr_row[terminal->column],
terminal->curr_attr, terminal->width - terminal->column);
for (i = terminal->row + 1; i < terminal->height; i++) {
memset(terminal_get_row(terminal, i),
0, terminal->data_pitch);
attr_init(terminal_get_attr_row(terminal, i),
terminal->curr_attr, terminal->width);
}
} else if (args[0] == 1) {
memset(row, 0, (terminal->column+1) * sizeof(union utf8_char));
attr_init(attr_row, terminal->curr_attr, terminal->column+1);
for (i = 0; i < terminal->row; i++) {
memset(terminal_get_row(terminal, i),
0, terminal->data_pitch);
attr_init(terminal_get_attr_row(terminal, i),
terminal->curr_attr, terminal->width);
}
} else if (args[0] == 2) {
for (i = 0; i < terminal->height; i++) {
memset(terminal_get_row(terminal, i),
0, terminal->data_pitch);
attr_init(terminal_get_attr_row(terminal, i),
terminal->curr_attr, terminal->width);
}
}
break;
case 'K': /* EL */
row = terminal_get_row(terminal, terminal->row);
attr_row = terminal_get_attr_row(terminal, terminal->row);
if (!set[0] || args[0] == 0 || args[0] > 2) {
memset(&row[terminal->column], 0,
(terminal->width - terminal->column) * sizeof(union utf8_char));
attr_init(&attr_row[terminal->column], terminal->curr_attr,
terminal->width - terminal->column);
} else if (args[0] == 1) {
memset(row, 0, (terminal->column+1) * sizeof(union utf8_char));
attr_init(attr_row, terminal->curr_attr, terminal->column+1);
} else if (args[0] == 2) {
memset(row, 0, terminal->data_pitch);
attr_init(attr_row, terminal->curr_attr, terminal->width);
}
break;
case 'L': /* IL */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
if (terminal->row >= terminal->margin_top &&
terminal->row < terminal->margin_bottom)
{
top = terminal->margin_top;
terminal->margin_top = terminal->row;
terminal_scroll(terminal, 0 - count);
terminal->margin_top = top;
} else if (terminal->row == terminal->margin_bottom) {
memset(terminal_get_row(terminal, terminal->row),
0, terminal->data_pitch);
attr_init(terminal_get_attr_row(terminal, terminal->row),
terminal->curr_attr, terminal->width);
}
break;
case 'M': /* DL */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
if (terminal->row >= terminal->margin_top &&
terminal->row < terminal->margin_bottom)
{
top = terminal->margin_top;
terminal->margin_top = terminal->row;
terminal_scroll(terminal, count);
terminal->margin_top = top;
} else if (terminal->row == terminal->margin_bottom) {
memset(terminal_get_row(terminal, terminal->row),
0, terminal->data_pitch);
}
break;
case 'P': /* DCH */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
terminal_shift_line(terminal, 0 - count);
break;
case 'S': /* SU */
terminal_scroll(terminal, set[0] ? args[0] : 1);
break;
case 'T': /* SD */
terminal_scroll(terminal, 0 - (set[0] ? args[0] : 1));
break;
case 'X': /* ECH */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
if ((terminal->column + count) > terminal->width)
count = terminal->width - terminal->column;
row = terminal_get_row(terminal, terminal->row);
attr_row = terminal_get_attr_row(terminal, terminal->row);
memset(&row[terminal->column], 0, count * sizeof(union utf8_char));
attr_init(&attr_row[terminal->column], terminal->curr_attr, count);
break;
case 'Z': /* CBT */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
while (count > 0 && terminal->column >= 0) {
if (terminal->tab_ruler[terminal->column]) count--;
terminal->column--;
}
terminal->column++;
break;
case '`': /* HPA */
y = set[0] ? args[0] : 1;
y = y <= 0 ? 1 : y > terminal->width ? terminal->width : y;
terminal->column = y - 1;
break;
case 'b': /* REP */
count = set[0] ? args[0] : 1;
if (count == 0) count = 1;
if (terminal->last_char.byte[0])
for (i = 0; i < count; i++)
handle_char(terminal, terminal->last_char);
terminal->last_char.byte[0] = 0;
break;
case 'c': /* Primary DA */
terminal_write(terminal, "\e[?6c", 5);
break;
case 'd': /* VPA */
x = set[0] ? args[0] : 1;
x = x <= 0 ? 1 : x > terminal->height ? terminal->height : x;
terminal->row = x - 1;
break;
case 'g': /* TBC */
if (!set[0] || args[0] == 0) {
terminal->tab_ruler[terminal->column] = 0;
} else if (args[0] == 3) {
memset(terminal->tab_ruler, 0, terminal->width);
}
break;
case 'h': /* SM */
for(i = 0; i < 10 && set[i]; i++) {
handle_term_parameter(terminal, args[i], 1);
}
break;
case 'l': /* RM */
for(i = 0; i < 10 && set[i]; i++) {
handle_term_parameter(terminal, args[i], 0);
}
break;
case 'm': /* SGR */
for(i = 0; i < 10; i++) {
if (i <= 7 && set[i] && set[i + 1] &&
set[i + 2] && args[i + 1] == 5)
{
if (args[i] == 38) {
handle_sgr(terminal, args[i + 2] + 256);
break;
} else if (args[i] == 48) {
handle_sgr(terminal, args[i + 2] + 512);
break;
}
}
if(set[i]) {
handle_sgr(terminal, args[i]);
} else if(i == 0) {
handle_sgr(terminal, 0);
break;
} else {
break;
}
}
break;
case 'n': /* DSR */
i = set[0] ? args[0] : 0;
if (i == 0 || i == 5) {
terminal_write(terminal, "\e[0n", 4);
} else if (i == 6) {
snprintf(response, MAX_RESPONSE, "\e[%d;%dR",
terminal->origin_mode ?
terminal->row+terminal->margin_top : terminal->row+1,
terminal->column+1);
terminal_write(terminal, response, strlen(response));
}
break;
case 'r':
if(!set[0]) {
terminal->margin_top = 0;
terminal->margin_bottom = terminal->height-1;
terminal->row = 0;
terminal->column = 0;
} else {
top = (set[0] ? args[0] : 1) - 1;
top = top < 0 ? 0 :
(top >= terminal->height ? terminal->height - 1 : top);
bottom = (set[1] ? args[1] : 1) - 1;
bottom = bottom < 0 ? 0 :
(bottom >= terminal->height ? terminal->height - 1 : bottom);
if(bottom > top) {
terminal->margin_top = top;
terminal->margin_bottom = bottom;
} else {
terminal->margin_top = 0;
terminal->margin_bottom = terminal->height-1;
}
if(terminal->origin_mode)
terminal->row = terminal->margin_top;
else
terminal->row = 0;
terminal->column = 0;
}
break;
case 's':
terminal->saved_row = terminal->row;
terminal->saved_column = terminal->column;
break;
case 't': /* windowOps */
if (!set[0]) break;
switch (args[0]) {
case 4: /* resize px */
if (set[1] && set[2]) {
widget_schedule_resize(terminal->widget,
args[2], args[1]);
}
break;
case 8: /* resize ch */
if (set[1] && set[2]) {
terminal_resize(terminal, args[2], args[1]);
}
break;
case 13: /* report position */
widget_get_allocation(terminal->widget, &allocation);
snprintf(response, MAX_RESPONSE, "\e[3;%d;%dt",
allocation.x, allocation.y);
terminal_write(terminal, response, strlen(response));
break;
case 14: /* report px */
widget_get_allocation(terminal->widget, &allocation);
snprintf(response, MAX_RESPONSE, "\e[4;%d;%dt",
allocation.height, allocation.width);
terminal_write(terminal, response, strlen(response));
break;
case 18: /* report ch */
snprintf(response, MAX_RESPONSE, "\e[9;%d;%dt",
terminal->height, terminal->width);
terminal_write(terminal, response, strlen(response));
break;
case 21: /* report title */
snprintf(response, MAX_RESPONSE, "\e]l%s\e\\",
window_get_title(terminal->window));
terminal_write(terminal, response, strlen(response));
break;
default:
if (args[0] >= 24)
terminal_resize(terminal, terminal->width, args[0]);
else
fprintf(stderr, "Unimplemented windowOp %d\n", args[0]);
break;
}
case 'u':
terminal->row = terminal->saved_row;
terminal->column = terminal->saved_column;
break;
default:
fprintf(stderr, "Unknown CSI escape: %c\n", *p);
break;
}
}
static void
handle_non_csi_escape(struct terminal *terminal, char code)
{
switch(code) {
case 'M': /* RI */
terminal->row -= 1;
if(terminal->row < terminal->margin_top) {
terminal->row = terminal->margin_top;
terminal_scroll(terminal, -1);
}
break;
case 'E': /* NEL */
terminal->column = 0;
// fallthrough
case 'D': /* IND */
terminal->row += 1;
if(terminal->row > terminal->margin_bottom) {
terminal->row = terminal->margin_bottom;
terminal_scroll(terminal, +1);
}
break;
case 'c': /* RIS */
terminal_init(terminal);
break;
case 'H': /* HTS */
terminal->tab_ruler[terminal->column] = 1;
break;
case '7': /* DECSC */
terminal->saved_row = terminal->row;
terminal->saved_column = terminal->column;
terminal->saved_attr = terminal->curr_attr;
terminal->saved_origin_mode = terminal->origin_mode;
terminal->saved_cs = terminal->cs;
terminal->saved_g0 = terminal->g0;
terminal->saved_g1 = terminal->g1;
break;
case '8': /* DECRC */
terminal->row = terminal->saved_row;
terminal->column = terminal->saved_column;
terminal->curr_attr = terminal->saved_attr;
terminal->origin_mode = terminal->saved_origin_mode;
terminal->cs = terminal->saved_cs;
terminal->g0 = terminal->saved_g0;
terminal->g1 = terminal->saved_g1;
break;
case '=': /* DECPAM */
terminal->key_mode = KM_APPLICATION;
break;
case '>': /* DECPNM */
terminal->key_mode = KM_NORMAL;
break;
default:
fprintf(stderr, "Unknown escape code: %c\n", code);
break;
}
}
static void
handle_special_escape(struct terminal *terminal, char special, char code)
{
int i, numChars;
if (special == '#') {
switch(code) {
case '8':
/* fill with 'E', no cheap way to do this */
memset(terminal->data, 0, terminal->data_pitch * terminal->height);
numChars = terminal->width * terminal->height;
for(i = 0; i < numChars; i++) {
terminal->data[i].byte[0] = 'E';
}
break;
default:
fprintf(stderr, "Unknown HASH escape #%c\n", code);
break;
}
} else if (special == '(' || special == ')') {
switch(code) {
case '0':
if (special == '(')
terminal->g0 = CS_SPECIAL;
else
terminal->g1 = CS_SPECIAL;
break;
case 'A':
if (special == '(')
terminal->g0 = CS_UK;
else
terminal->g1 = CS_UK;
break;
case 'B':
if (special == '(')
terminal->g0 = CS_US;
else
terminal->g1 = CS_US;
break;
default:
fprintf(stderr, "Unknown character set %c\n", code);
break;
}
} else {
fprintf(stderr, "Unknown special escape %c%c\n", special, code);
}
}
static void
handle_sgr(struct terminal *terminal, int code)
{
switch(code) {
case 0:
terminal->curr_attr = terminal->color_scheme->default_attr;
break;
case 1:
terminal->curr_attr.a |= ATTRMASK_BOLD;
if (terminal->curr_attr.fg < 8)
terminal->curr_attr.fg += 8;
break;
case 4:
terminal->curr_attr.a |= ATTRMASK_UNDERLINE;
break;
case 5:
terminal->curr_attr.a |= ATTRMASK_BLINK;
break;
case 8:
terminal->curr_attr.a |= ATTRMASK_CONCEALED;
break;
case 2:
case 21:
case 22:
terminal->curr_attr.a &= ~ATTRMASK_BOLD;
if (terminal->curr_attr.fg < 16 && terminal->curr_attr.fg >= 8)
terminal->curr_attr.fg -= 8;
break;
case 24:
terminal->curr_attr.a &= ~ATTRMASK_UNDERLINE;
break;
case 25:
terminal->curr_attr.a &= ~ATTRMASK_BLINK;
break;
case 7:
case 26:
terminal->curr_attr.a |= ATTRMASK_INVERSE;
break;
case 27:
terminal->curr_attr.a &= ~ATTRMASK_INVERSE;
break;
case 28:
terminal->curr_attr.a &= ~ATTRMASK_CONCEALED;
break;
case 39:
terminal->curr_attr.fg = terminal->color_scheme->default_attr.fg;
break;
case 49:
terminal->curr_attr.bg = terminal->color_scheme->default_attr.bg;
break;
default:
if(code >= 30 && code <= 37) {
terminal->curr_attr.fg = code - 30;
if (terminal->curr_attr.a & ATTRMASK_BOLD)
terminal->curr_attr.fg += 8;
} else if(code >= 40 && code <= 47) {
terminal->curr_attr.bg = code - 40;
} else if (code >= 90 && code <= 97) {
terminal->curr_attr.fg = code - 90 + 8;
} else if (code >= 100 && code <= 107) {
terminal->curr_attr.bg = code - 100 + 8;
} else if(code >= 256 && code < 512) {
terminal->curr_attr.fg = code - 256;
} else if(code >= 512 && code < 768) {
terminal->curr_attr.bg = code - 512;
} else {
fprintf(stderr, "Unknown SGR code: %d\n", code);
}
break;
}
}
/* Returns 1 if c was special, otherwise 0 */
static int
handle_special_char(struct terminal *terminal, char c)
{
union utf8_char *row;
struct attr *attr_row;
row = terminal_get_row(terminal, terminal->row);
attr_row = terminal_get_attr_row(terminal, terminal->row);
switch(c) {
case '\r':
terminal->column = 0;
break;
case '\n':
if (terminal->mode & MODE_LF_NEWLINE) {
terminal->column = 0;
}
/* fallthrough */
case '\v':
case '\f':
terminal->row++;
if(terminal->row > terminal->margin_bottom) {
terminal->row = terminal->margin_bottom;
terminal_scroll(terminal, +1);
}
break;
case '\t':
while (terminal->column < terminal->width) {
if (terminal->tab_ruler[terminal->column]) break;
if (terminal->mode & MODE_IRM)
terminal_shift_line(terminal, +1);
row[terminal->column].byte[0] = ' ';
row[terminal->column].byte[1] = '\0';
attr_row[terminal->column] = terminal->curr_attr;
terminal->column++;
}
if (terminal->column >= terminal->width) {
terminal->column = terminal->width - 1;
}
break;
case '\b':
if (terminal->column >= terminal->width) {
terminal->column = terminal->width - 2;
} else if (terminal->column > 0) {
terminal->column--;
} else if (terminal->mode & MODE_AUTOWRAP) {
terminal->column = terminal->width - 1;
terminal->row -= 1;
if (terminal->row < terminal->margin_top) {
terminal->row = terminal->margin_top;
terminal_scroll(terminal, -1);
}
}
break;
case '\a':
/* Bell */
break;
case '\x0E': /* SO */
terminal->cs = terminal->g1;
break;
case '\x0F': /* SI */
terminal->cs = terminal->g0;
break;
default:
return 0;
}
return 1;
}
static void
handle_char(struct terminal *terminal, union utf8_char utf8)
{
union utf8_char *row;
struct attr *attr_row;
if (handle_special_char(terminal, utf8.byte[0])) return;
apply_char_set(terminal->cs, &utf8);
/* There are a whole lot of non-characters, control codes,
* and formatting codes that should probably be ignored,
* for example: */
if (strncmp((char*) utf8.byte, "\xEF\xBB\xBF", 3) == 0) {
/* BOM, ignore */
return;
}
/* Some of these non-characters should be translated, e.g.: */
if (utf8.byte[0] < 32) {
utf8.byte[0] = utf8.byte[0] + 64;
}
/* handle right margin effects */
if (terminal->column >= terminal->width) {
if (terminal->mode & MODE_AUTOWRAP) {
terminal->column = 0;
terminal->row += 1;
if (terminal->row > terminal->margin_bottom) {
terminal->row = terminal->margin_bottom;
terminal_scroll(terminal, +1);
}
} else {
terminal->column--;
}
}
row = terminal_get_row(terminal, terminal->row);
attr_row = terminal_get_attr_row(terminal, terminal->row);
if (terminal->mode & MODE_IRM)
terminal_shift_line(terminal, +1);
row[terminal->column] = utf8;
attr_row[terminal->column++] = terminal->curr_attr;
if (utf8.ch != terminal->last_char.ch)
terminal->last_char = utf8;
}
static void
escape_append_utf8(struct terminal *terminal, union utf8_char utf8)
{
int len, i;
if ((utf8.byte[0] & 0x80) == 0x00) len = 1;
else if ((utf8.byte[0] & 0xE0) == 0xC0) len = 2;
else if ((utf8.byte[0] & 0xF0) == 0xE0) len = 3;
else if ((utf8.byte[0] & 0xF8) == 0xF0) len = 4;
else len = 1; /* Invalid, cannot happen */
if (terminal->escape_length + len <= MAX_ESCAPE) {
for (i = 0; i < len; i++)
terminal->escape[terminal->escape_length + i] = utf8.byte[i];
terminal->escape_length += len;
} else if (terminal->escape_length < MAX_ESCAPE) {
terminal->escape[terminal->escape_length++] = 0;
}
}
static void
terminal_data(struct terminal *terminal, const char *data, size_t length)
{
unsigned int i;
union utf8_char utf8;
enum utf8_state parser_state;
for (i = 0; i < length; i++) {
parser_state =
utf8_next_char(&terminal->state_machine, data[i]);
switch(parser_state) {
case utf8state_accept:
utf8.ch = terminal->state_machine.s.ch;
break;
case utf8state_reject:
/* the unicode replacement character */
utf8.byte[0] = 0xEF;
utf8.byte[1] = 0xBF;
utf8.byte[2] = 0xBD;
utf8.byte[3] = 0x00;
break;
default:
continue;
}
/* assume escape codes never use non-ASCII characters */
switch (terminal->state) {
case escape_state_escape:
escape_append_utf8(terminal, utf8);
switch (utf8.byte[0]) {
case 'P': /* DCS */
terminal->state = escape_state_dcs;
break;
case '[': /* CSI */
terminal->state = escape_state_csi;
break;
case ']': /* OSC */
terminal->state = escape_state_osc;
break;
case '#':
case '(':
case ')': /* special */
terminal->state = escape_state_special;
break;
case '^': /* PM (not implemented) */
case '_': /* APC (not implemented) */
terminal->state = escape_state_ignore;
break;
default:
terminal->state = escape_state_normal;
handle_non_csi_escape(terminal, utf8.byte[0]);
break;
}
continue;
case escape_state_csi:
if (handle_special_char(terminal, utf8.byte[0]) != 0) {
/* do nothing */
} else if (utf8.byte[0] == '?') {
terminal->escape_flags |= ESC_FLAG_WHAT;
} else if (utf8.byte[0] == '>') {
terminal->escape_flags |= ESC_FLAG_GT;
} else if (utf8.byte[0] == '!') {
terminal->escape_flags |= ESC_FLAG_BANG;
} else if (utf8.byte[0] == '$') {
terminal->escape_flags |= ESC_FLAG_CASH;
} else if (utf8.byte[0] == '\'') {
terminal->escape_flags |= ESC_FLAG_SQUOTE;
} else if (utf8.byte[0] == '"') {
terminal->escape_flags |= ESC_FLAG_DQUOTE;
} else if (utf8.byte[0] == ' ') {
terminal->escape_flags |= ESC_FLAG_SPACE;
} else {
escape_append_utf8(terminal, utf8);
if (terminal->escape_length >= MAX_ESCAPE)
terminal->state = escape_state_normal;
}
if (isalpha(utf8.byte[0]) || utf8.byte[0] == '@' ||
utf8.byte[0] == '`')
{
terminal->state = escape_state_normal;
handle_escape(terminal);
} else {
}
continue;
case escape_state_inner_escape:
if (utf8.byte[0] == '\\') {
terminal->state = escape_state_normal;
if (terminal->outer_state == escape_state_dcs) {
handle_dcs(terminal);
} else if (terminal->outer_state == escape_state_osc) {
handle_osc(terminal);
}
} else if (utf8.byte[0] == '\e') {
terminal->state = terminal->outer_state;
escape_append_utf8(terminal, utf8);
if (terminal->escape_length >= MAX_ESCAPE)
terminal->state = escape_state_normal;
} else {
terminal->state = terminal->outer_state;
if (terminal->escape_length < MAX_ESCAPE)
terminal->escape[terminal->escape_length++] = '\e';
escape_append_utf8(terminal, utf8);
if (terminal->escape_length >= MAX_ESCAPE)
terminal->state = escape_state_normal;
}
continue;
case escape_state_dcs:
case escape_state_osc:
case escape_state_ignore:
if (utf8.byte[0] == '\e') {
terminal->outer_state = terminal->state;
terminal->state = escape_state_inner_escape;
} else if (utf8.byte[0] == '\a' && terminal->state == escape_state_osc) {
terminal->state = escape_state_normal;
handle_osc(terminal);
} else {
escape_append_utf8(terminal, utf8);
if (terminal->escape_length >= MAX_ESCAPE)
terminal->state = escape_state_normal;
}
continue;
case escape_state_special:
escape_append_utf8(terminal, utf8);
terminal->state = escape_state_normal;
if (isdigit(utf8.byte[0]) || isalpha(utf8.byte[0])) {
handle_special_escape(terminal, terminal->escape[1],
utf8.byte[0]);
}
continue;
default:
break;
}
/* this is valid, because ASCII characters are never used to
* introduce a multibyte sequence in UTF-8 */
if (utf8.byte[0] == '\e') {
terminal->state = escape_state_escape;
terminal->outer_state = escape_state_normal;
terminal->escape[0] = '\e';
terminal->escape_length = 1;
terminal->escape_flags = 0;
} else {
handle_char(terminal, utf8);
} /* if */
} /* for */
window_schedule_redraw(terminal->window);
}
static void
data_source_target(void *data,
struct wl_data_source *source, const char *mime_type)
{
fprintf(stderr, "data_source_target, %s\n", mime_type);
}
static void
data_source_send(void *data,
struct wl_data_source *source,
const char *mime_type, int32_t fd)
{
struct terminal *terminal = data;
terminal_send_selection(terminal, fd);
}
static void
data_source_cancelled(void *data, struct wl_data_source *source)
{
wl_data_source_destroy(source);
}
static const struct wl_data_source_listener data_source_listener = {
data_source_target,
data_source_send,
data_source_cancelled
};
static int
handle_bound_key(struct terminal *terminal,
struct input *input, uint32_t sym, uint32_t time)
{
switch (sym) {
case XK_X:
/* Cut selection; terminal doesn't do cut, fall
* through to copy. */
case XK_C:
terminal->selection =
display_create_data_source(terminal->display);
wl_data_source_offer(terminal->selection,
"text/plain;charset=utf-8");
wl_data_source_add_listener(terminal->selection,
&data_source_listener, terminal);
input_set_selection(input, terminal->selection, time);
return 1;
case XK_V:
input_receive_selection_data_to_fd(input,
"text/plain;charset=utf-8",
terminal->master);
return 1;
default:
return 0;
}
}
static void
key_handler(struct window *window, struct input *input, uint32_t time,
uint32_t key, uint32_t sym, uint32_t state, void *data)
{
struct terminal *terminal = data;
char ch[MAX_RESPONSE];
uint32_t modifiers;
int len = 0;
modifiers = input_get_modifiers(input);
if ((modifiers & MOD_CONTROL_MASK) &&
(modifiers & MOD_SHIFT_MASK) &&
state && handle_bound_key(terminal, input, sym, time))
return;
switch (sym) {
case XK_F11:
if (!state)
break;
terminal->fullscreen ^= 1;
window_set_fullscreen(window, terminal->fullscreen);
break;
case XK_BackSpace:
case XK_Tab:
case XK_Linefeed:
case XK_Clear:
case XK_Pause:
case XK_Scroll_Lock:
case XK_Sys_Req:
case XK_Escape:
ch[len++] = sym & 0x7f;
break;
case XK_Return:
if (terminal->mode & MODE_LF_NEWLINE) {
ch[len++] = 0x0D;
ch[len++] = 0x0A;
} else {
ch[len++] = 0x0D;
}
break;
case XK_Shift_L:
case XK_Shift_R:
case XK_Control_L:
case XK_Control_R:
case XK_Alt_L:
case XK_Alt_R:
break;
case XK_Insert:
len = function_key_response('[', 2, modifiers, '~', ch);
break;
case XK_Delete:
if (terminal->mode & MODE_DELETE_SENDS_DEL) {
ch[len++] = '\x04';
} else {
len = function_key_response('[', 3, modifiers, '~', ch);
}
break;
case XK_Page_Up:
len = function_key_response('[', 5, modifiers, '~', ch);
break;
case XK_Page_Down:
len = function_key_response('[', 6, modifiers, '~', ch);
break;
case XK_F1:
len = function_key_response('O', 1, modifiers, 'P', ch);
break;
case XK_F2:
len = function_key_response('O', 1, modifiers, 'Q', ch);
break;
case XK_F3:
len = function_key_response('O', 1, modifiers, 'R', ch);
break;
case XK_F4:
len = function_key_response('O', 1, modifiers, 'S', ch);
break;
case XK_F5:
len = function_key_response('[', 15, modifiers, '~', ch);
break;
case XK_F6:
len = function_key_response('[', 17, modifiers, '~', ch);
break;
case XK_F7:
len = function_key_response('[', 18, modifiers, '~', ch);
break;
case XK_F8:
len = function_key_response('[', 19, modifiers, '~', ch);
break;
case XK_F9:
len = function_key_response('[', 20, modifiers, '~', ch);
break;
case XK_F10:
len = function_key_response('[', 21, modifiers, '~', ch);
break;
case XK_F12:
len = function_key_response('[', 24, modifiers, '~', ch);
break;
default:
/* Handle special keys with alternate mappings */
len = apply_key_map(terminal->key_mode, sym, modifiers, ch);
if (len != 0) break;
if (modifiers & MOD_CONTROL_MASK) {
if (sym >= '3' && sym <= '7')
sym = (sym & 0x1f) + 8;
if (!((sym >= '!' && sym <= '/') ||
(sym >= '8' && sym <= '?') ||
(sym >= '0' && sym <= '2'))) sym = sym & 0x1f;
else if (sym == '2') sym = 0x00;
else if (sym == '/') sym = 0x1F;
else if (sym == '8' || sym == '?') sym = 0x7F;
} else if ((terminal->mode & MODE_ALT_SENDS_ESC) &&
(modifiers & MOD_ALT_MASK))
{
ch[len++] = 0x1b;
} else if (modifiers & MOD_ALT_MASK) {
sym = sym | 0x80;
}
if (sym < 256)
ch[len++] = sym;
break;
}
if (state && len > 0)
terminal_write(terminal, ch, len);
}
static void
keyboard_focus_handler(struct window *window,
struct input *device, void *data)
{
struct terminal *terminal = data;
terminal->focused = (device != NULL);
window_schedule_redraw(terminal->window);
}
static void
button_handler(struct widget *widget,
struct input *input, uint32_t time,
uint32_t button, uint32_t state, void *data)
{
struct terminal *terminal = data;
switch (button) {
case 272:
if (state) {
terminal->dragging = 1;
input_get_position(input,
&terminal->selection_start_x,
&terminal->selection_start_y);
terminal->selection_end_x = terminal->selection_start_x;
terminal->selection_end_y = terminal->selection_start_y;
widget_schedule_redraw(widget);
} else {
terminal->dragging = 0;
}
break;
}
}
static int
motion_handler(struct widget *widget,
struct input *input, uint32_t time,
GLfloat x, GLfloat y, void *data)
{
struct terminal *terminal = data;
if (terminal->dragging) {
input_get_position(input,
&terminal->selection_end_x,
&terminal->selection_end_y);
widget_schedule_redraw(widget);
}
return POINTER_IBEAM;
}
static struct terminal *
terminal_create(struct display *display, int fullscreen)
{
struct terminal *terminal;
cairo_surface_t *surface;
cairo_t *cr;
terminal = malloc(sizeof *terminal);
if (terminal == NULL)
return terminal;
memset(terminal, 0, sizeof *terminal);
terminal->fullscreen = fullscreen;
terminal->color_scheme = &DEFAULT_COLORS;
terminal_init(terminal);
terminal->margin_top = 0;
terminal->margin_bottom = -1;
terminal->window = window_create(display);
terminal->widget = frame_create(terminal->window, terminal);
window_set_title(terminal->window, "Wayland Terminal");
widget_set_transparent(terminal->widget, 0);
init_state_machine(&terminal->state_machine);
init_color_table(terminal);
terminal->display = display;
terminal->margin = 5;
window_set_user_data(terminal->window, terminal);
window_set_key_handler(terminal->window, key_handler);
window_set_keyboard_focus_handler(terminal->window,
keyboard_focus_handler);
widget_set_redraw_handler(terminal->widget, redraw_handler);
widget_set_resize_handler(terminal->widget, resize_handler);
widget_set_button_handler(terminal->widget, button_handler);
widget_set_motion_handler(terminal->widget, motion_handler);
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 0, 0);
cr = cairo_create(surface);
cairo_set_font_size(cr, 14);
cairo_select_font_face (cr, "mono",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_BOLD);
terminal->font_bold = cairo_get_scaled_font (cr);
cairo_scaled_font_reference(terminal->font_bold);
cairo_select_font_face (cr, "mono",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
terminal->font_normal = cairo_get_scaled_font (cr);
cairo_scaled_font_reference(terminal->font_normal);
cairo_font_extents(cr, &terminal->extents);
cairo_destroy(cr);
cairo_surface_destroy(surface);
window_schedule_resize(terminal->window, 500, 400);
return terminal;
}
static void
io_handler(struct task *task, uint32_t events)
{
struct terminal *terminal =
container_of(task, struct terminal, io_task);
char buffer[256];
int len;
if (events & EPOLLHUP)
exit(0);
len = read(terminal->master, buffer, sizeof buffer);
if (len < 0)
exit(0);
terminal_data(terminal, buffer, len);
}
static int
terminal_run(struct terminal *terminal, const char *path)
{
int master;
pid_t pid;
pid = forkpty(&master, NULL, NULL, NULL);
if (pid == 0) {
setenv("TERM", "xterm-256color", 1);
setenv("COLORTERM", "xterm-256color", 1);
if (execl(path, path, NULL)) {
printf("exec failed: %m\n");
exit(EXIT_FAILURE);
}
} else if (pid < 0) {
fprintf(stderr, "failed to fork and create pty (%m).\n");
return -1;
}
terminal->master = master;
fcntl(master, F_SETFL, O_NONBLOCK);
terminal->io_task.run = io_handler;
display_watch_fd(terminal->display, terminal->master,
EPOLLIN | EPOLLHUP, &terminal->io_task);
window_set_fullscreen(terminal->window, terminal->fullscreen);
if (!terminal->fullscreen)
terminal_resize(terminal, 80, 24);
return 0;
}
static const struct weston_option terminal_options[] = {
{ WESTON_OPTION_BOOLEAN, "fullscreen", 'f', &option_fullscreen },
};
int main(int argc, char *argv[])
{
struct display *d;
struct terminal *terminal;
const char *shell;
argc = parse_options(terminal_options,
ARRAY_LENGTH(terminal_options), argc, argv);
d = display_create(argc, argv);
if (d == NULL) {
fprintf(stderr, "failed to create display: %m\n");
return -1;
}
shell = getenv("SHELL");
if (!shell)
shell = "/bin/bash";
terminal = terminal_create(d, option_fullscreen);
if (terminal_run(terminal, shell))
exit(EXIT_FAILURE);
display_run(d);
return 0;
}