weston/terminal.c

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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>
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#include <ctype.h>
#include <cairo.h>
#include <glib.h>
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#include <linux/input.h>
#include <GL/gl.h>
#include <eagle.h>
#include "wayland-client.h"
#include "wayland-glib.h"
#include "cairo-util.h"
#include "window.h"
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static int option_fullscreen;
static const char gem_device[] = "/dev/dri/card0";
static const char socket_name[] = "\0wayland";
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#define MOD_SHIFT 0x01
#define MOD_ALT 0x02
#define MOD_CTRL 0x04
struct terminal {
struct window *window;
struct wl_display *display;
struct wl_compositor *compositor;
int redraw_scheduled, redraw_pending;
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char *data;
int width, height, start, row, column;
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int fd, master;
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struct buffer *buffer;
GIOChannel *channel;
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uint32_t modifiers;
char escape[64];
int escape_length;
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int state;
int margin;
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int fullscreen;
};
static char *
terminal_get_row(struct terminal *terminal, int row)
{
int index;
index = (row + terminal->start) % terminal->height;
return &terminal->data[index * (terminal->width + 1)];
}
static void
terminal_resize(struct terminal *terminal, int width, int height)
{
size_t size;
char *data;
int i, l, total_rows, start;
if (terminal->width == width && terminal->height == height)
return;
size = (width + 1) * height;
data = malloc(size);
memset(data, 0, size);
if (terminal->data) {
if (width > terminal->width)
l = terminal->width;
else
l = width;
if (terminal->height > height) {
total_rows = height;
start = terminal->height - height;
} else {
total_rows = terminal->height;
start = 0;
}
for (i = 0; i < total_rows; i++)
memcpy(data + (width + 1) * i,
terminal_get_row(terminal, i), l);
free(terminal->data);
}
terminal->width = width;
terminal->height = height;
terminal->data = data;
if (terminal->row >= terminal->height)
terminal->row = terminal->height - 1;
if (terminal->column >= terminal->width)
terminal->column = terminal->width - 1;
terminal->start = 0;
}
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static void
terminal_draw_contents(struct terminal *terminal)
{
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struct rectangle rectangle;
cairo_surface_t *surface;
cairo_t *cr;
cairo_font_extents_t extents;
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int i, top_margin, side_margin;
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window_get_child_rectangle(terminal->window, &rectangle);
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
rectangle.width, rectangle.height);
cr = cairo_create(surface);
cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
cairo_set_source_rgba(cr, 0, 0, 0, 0.9);
cairo_paint(cr);
cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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cairo_set_source_rgba(cr, 0, 0.7, 0, 1);
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cairo_select_font_face (cr, "mono",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(cr, 14);
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cairo_font_extents(cr, &extents);
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side_margin = (rectangle.width - terminal->width * extents.max_x_advance) / 2;
top_margin = (rectangle.height - terminal->height * extents.height) / 2;
for (i = 0; i < terminal->height; i++) {
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cairo_move_to(cr, side_margin,
top_margin + extents.ascent + extents.height * i);
cairo_show_text(cr, terminal_get_row(terminal, i));
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}
cairo_destroy(cr);
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terminal->buffer = buffer_create_from_cairo_surface(terminal->fd, surface);
cairo_surface_destroy(surface);
window_copy(terminal->window,
&rectangle,
terminal->buffer->name, terminal->buffer->stride);
}
static void
terminal_draw(struct terminal *terminal)
{
struct rectangle rectangle;
cairo_surface_t *surface;
cairo_font_extents_t extents;
cairo_t *cr;
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int32_t width, height;
window_get_child_rectangle(terminal->window, &rectangle);
surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32, 0, 0);
cr = cairo_create(surface);
cairo_select_font_face (cr, "mono",
CAIRO_FONT_SLANT_NORMAL,
CAIRO_FONT_WEIGHT_NORMAL);
cairo_set_font_size(cr, 14);
cairo_font_extents(cr, &extents);
cairo_destroy(cr);
cairo_surface_destroy(surface);
width = (rectangle.width - 2 * terminal->margin) / (int32_t) extents.max_x_advance;
height = (rectangle.height - 2 * terminal->margin) / (int32_t) extents.height;
terminal_resize(terminal, width, height);
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if (!terminal->fullscreen) {
rectangle.width = terminal->width * extents.max_x_advance + 2 * terminal->margin;
rectangle.height = terminal->height * extents.height + 2 * terminal->margin;
window_set_child_size(terminal->window, &rectangle);
}
window_draw(terminal->window);
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terminal_draw_contents(terminal);
wl_compositor_commit(terminal->compositor, 0);
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}
static gboolean
idle_redraw(void *data)
{
struct terminal *terminal = data;
terminal_draw(terminal);
return FALSE;
}
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#define STATE_NORMAL 0
#define STATE_ESCAPE 1
static void
terminal_data(struct terminal *terminal, const char *data, size_t length);
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static void
terminal_schedule_redraw(struct terminal *terminal)
{
if (!terminal->redraw_scheduled) {
g_idle_add(idle_redraw, terminal);
terminal->redraw_scheduled = 1;
} else {
terminal->redraw_pending = 1;
}
}
static void
terminal_data(struct terminal *terminal, const char *data, size_t length);
static void
handle_escape(struct terminal *terminal)
{
char *row, *p;
int i, count;
int args[10], set[10] = { 0, };
terminal->escape[terminal->escape_length++] = '\0';
i = 0;
p = &terminal->escape[2];
while ((isdigit(*p) || *p == ';') && i < 10) {
if (*p == ';') {
p++;
i++;
} else {
args[i] = strtol(p, &p, 10);
set[i] = 1;
}
}
switch (*p) {
case 'A':
count = set[0] ? args[0] : 1;
if (terminal->row - count >= 0)
terminal->row -= count;
else
terminal->row = 0;
break;
case 'B':
count = set[0] ? args[0] : 1;
if (terminal->row + count < terminal->height)
terminal->row += count;
else
terminal->row = terminal->height;
break;
case 'C':
count = set[0] ? args[0] : 1;
if (terminal->column + count < terminal->width)
terminal->column += count;
else
terminal->column = terminal->width;
break;
case 'D':
count = set[0] ? args[0] : 1;
if (terminal->column - count >= 0)
terminal->column -= count;
else
terminal->column = 0;
break;
case 'J':
row = terminal_get_row(terminal, terminal->row);
memset(&row[terminal->column], 0, terminal->width - terminal->column);
for (i = terminal->row + 1; i < terminal->height; i++)
memset(terminal_get_row(terminal, i), 0, terminal->width);
break;
case 'G':
if (set[0])
terminal->column = args[0] - 1;
break;
case 'H':
case 'f':
terminal->row = set[0] ? args[0] - 1 : 0;
terminal->column = set[1] ? args[1] - 1 : 0;
break;
case 'K':
row = terminal_get_row(terminal, terminal->row);
memset(&row[terminal->column], 0, terminal->width - terminal->column);
break;
case 'm':
/* color, blink, bold etc*/
break;
case '?':
if (strcmp(p, "?25l") == 0) {
/* hide cursor */
} else if (strcmp(p, "?25h") == 0) {
/* show cursor */
}
break;
default:
terminal_data(terminal,
terminal->escape + 1,
terminal->escape_length - 2);
break;
}
}
static void
terminal_data(struct terminal *terminal, const char *data, size_t length)
{
int i;
char *row;
for (i = 0; i < length; i++) {
row = terminal_get_row(terminal, terminal->row);
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if (terminal->state == STATE_ESCAPE) {
terminal->escape[terminal->escape_length++] = data[i];
if (terminal->escape_length == 2 && data[i] != '[') {
/* Bad escape sequence. */
terminal->state = STATE_NORMAL;
goto cancel_escape;
}
if (isalpha(data[i])) {
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terminal->state = STATE_NORMAL;
handle_escape(terminal);
}
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continue;
}
cancel_escape:
switch (data[i]) {
case '\r':
terminal->column = 0;
break;
case '\n':
terminal->column = 0;
if (terminal->row + 1 < terminal->height) {
terminal->row++;
} else {
terminal->start++;
if (terminal->start == terminal->height)
terminal->start = 0;
memset(terminal_get_row(terminal, terminal->row),
0, terminal->width);
}
break;
case '\t':
memset(&row[terminal->column], ' ', -terminal->column & 7);
terminal->column = (terminal->column + 7) & ~7;
break;
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case '\e':
terminal->state = STATE_ESCAPE;
terminal->escape[0] = '\e';
terminal->escape_length = 1;
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break;
case '\b':
if (terminal->column > 0)
terminal->column--;
break;
case '\a':
/* Bell */
break;
default:
if (terminal->column < terminal->width)
row[terminal->column++] = data[i] < 32 ? data[i] + 64 : data[i];
break;
}
}
terminal_schedule_redraw(terminal);
}
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static void
resize_handler(struct window *window, void *data)
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{
struct terminal *terminal = data;
terminal_schedule_redraw(terminal);
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}
static void
acknowledge_handler(struct window *window, uint32_t key, void *data)
{
struct terminal *terminal = data;
terminal->redraw_scheduled = 0;
buffer_destroy(terminal->buffer, terminal->fd);
if (terminal->redraw_pending) {
terminal->redraw_pending = 0;
terminal_schedule_redraw(terminal);
}
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}
struct key {
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int code[4];
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} evdev_keymap[] = {
{ { 0, 0 } }, /* 0 */
{ { 0x1b, 0x1b } },
{ { '1', '!' } },
{ { '2', '@' } },
{ { '3', '#' } },
{ { '4', '$' } },
{ { '5', '%' } },
{ { '6', '^' } },
{ { '7', '&' } },
{ { '8', '*' } },
{ { '9', '(' } },
{ { '0', ')' } },
{ { '-', '_' } },
{ { '=', '+' } },
{ { '\b', '\b' } },
{ { '\t', '\t' } },
{ { 'q', 'Q', 0x11 } }, /* 16 */
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{ { 'w', 'W', 0x17 } },
{ { 'e', 'E', 0x05 } },
{ { 'r', 'R', 0x12 } },
{ { 't', 'T', 0x14 } },
{ { 'y', 'Y', 0x19 } },
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{ { 'u', 'U', 0x15 } },
{ { 'i', 'I', 0x09 } },
{ { 'o', 'O', 0x0f } },
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{ { 'p', 'P', 0x10 } },
{ { '[', '{', 0x1b } },
{ { ']', '}', 0x1d } },
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{ { '\n', '\n' } },
{ { 0, 0 } },
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{ { 'a', 'A', 0x01} },
{ { 's', 'S', 0x13 } },
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{ { 'd', 'D', 0x04 } }, /* 32 */
{ { 'f', 'F', 0x06 } },
{ { 'g', 'G', 0x07 } },
{ { 'h', 'H', 0x08 } },
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{ { 'j', 'J', 0x0a } },
{ { 'k', 'K', 0x0b } },
{ { 'l', 'L', 0x0c } },
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{ { ';', ':' } },
{ { '\'', '"' } },
{ { '`', '~' } },
{ { 0, 0 } },
{ { '\\', '|', 0x1c } },
{ { 'z', 'Z', 0x1a } },
{ { 'x', 'X', 0x18 } },
{ { 'c', 'C', 0x03 } },
{ { 'v', 'V', 0x16 } },
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{ { 'b', 'B', 0x02 } }, /* 48 */
{ { 'n', 'N', 0x0e } },
{ { 'm', 'M', 0x0d } },
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{ { ',', '<' } },
{ { '.', '>' } },
{ { '/', '?' } },
{ { 0, 0 } },
{ { '*', '*' } },
{ { 0, 0 } },
{ { ' ', ' ' } },
{ { 0, 0 } }
/* 59 */
};
#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
static void
key_handler(struct window *window, uint32_t key, uint32_t state, void *data)
{
struct terminal *terminal = data;
uint32_t mod = 0;
char c;
switch (key) {
case KEY_LEFTSHIFT:
case KEY_RIGHTSHIFT:
mod = MOD_SHIFT;
break;
case KEY_LEFTCTRL:
case KEY_RIGHTCTRL:
mod = MOD_CTRL;
break;
case KEY_LEFTALT:
case KEY_RIGHTALT:
mod = MOD_ALT;
break;
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case KEY_F11:
if (!state)
break;
terminal->fullscreen ^= 1;
window_set_fullscreen(window, terminal->fullscreen);
terminal_schedule_redraw(terminal);
break;
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default:
if (key < ARRAY_LENGTH(evdev_keymap)) {
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if (terminal->modifiers & MOD_CTRL)
c = evdev_keymap[key].code[2];
else if (terminal->modifiers & MOD_SHIFT)
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c = evdev_keymap[key].code[1];
else
c = evdev_keymap[key].code[0];
if (state && c)
write(terminal->master, &c, 1);
}
break;
}
if (state)
terminal->modifiers |= mod;
else
terminal->modifiers &= ~mod;
}
static struct terminal *
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terminal_create(struct wl_display *display, int fd, int fullscreen)
{
struct terminal *terminal;
terminal = malloc(sizeof *terminal);
if (terminal == NULL)
return terminal;
memset(terminal, 0, sizeof *terminal);
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terminal->fd = fd;
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terminal->fullscreen = fullscreen;
terminal->window = window_create(display, fd, "Wayland Terminal",
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500, 100, 500, 400);
terminal->display = display;
terminal->redraw_scheduled = 1;
terminal->margin = 5;
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terminal->compositor = wl_display_get_compositor(display);
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window_set_fullscreen(terminal->window, terminal->fullscreen);
window_set_resize_handler(terminal->window, resize_handler, terminal);
window_set_acknowledge_handler(terminal->window, acknowledge_handler, terminal);
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window_set_key_handler(terminal->window, key_handler, terminal);
terminal_draw(terminal);
return terminal;
}
static gboolean
io_handler(GIOChannel *source,
GIOCondition condition,
gpointer data)
{
struct terminal *terminal = data;
gchar buffer[256];
gsize bytes_read;
GError *error = NULL;
g_io_channel_read_chars(source, buffer, sizeof buffer,
&bytes_read, &error);
terminal_data(terminal, buffer, bytes_read);
return TRUE;
}
static int
terminal_run(struct terminal *terminal, const char *path)
{
int master;
pid_t pid;
pid = forkpty(&master, NULL, NULL, NULL);
if (pid == 0) {
close(master);
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setenv("TERM", "vt100", 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;
}
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terminal->master = master;
terminal->channel = g_io_channel_unix_new(master);
fcntl(master, F_SETFL, O_NONBLOCK);
g_io_add_watch(terminal->channel, G_IO_IN,
io_handler, terminal);
return 0;
}
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static const GOptionEntry option_entries[] = {
{ "fullscreen", 'f', 0, G_OPTION_ARG_NONE,
&option_fullscreen, "Run in fullscreen mode" },
{ NULL }
};
int main(int argc, char *argv[])
{
struct wl_display *display;
int fd;
GMainLoop *loop;
GSource *source;
struct terminal *terminal;
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GOptionContext *context;
GError *error;
context = g_option_context_new(NULL);
g_option_context_add_main_entries(context, option_entries, "Wayland Terminal");
if (!g_option_context_parse(context, &argc, &argv, &error)) {
fprintf(stderr, "option parsing failed: %s\n", error->message);
exit(EXIT_FAILURE);
}
fd = open(gem_device, O_RDWR);
if (fd < 0) {
fprintf(stderr, "drm open failed: %m\n");
return -1;
}
display = wl_display_create(socket_name, sizeof socket_name);
if (display == NULL) {
fprintf(stderr, "failed to create display: %m\n");
return -1;
}
loop = g_main_loop_new(NULL, FALSE);
source = wl_glib_source_new(display);
g_source_attach(source, NULL);
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terminal = terminal_create(display, fd, option_fullscreen);
if (terminal_run(terminal, "/bin/bash"))
exit(EXIT_FAILURE);
g_main_loop_run(loop);
return 0;
}