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471 lines
11 KiB
471 lines
11 KiB
/*
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* Copyright © 2008 Kristian Høgsberg
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*
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* Permission to use, copy, modify, distribute, and sell this software and its
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* documentation for any purpose is hereby granted without fee, provided that
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* the above copyright notice appear in all copies and that both that copyright
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* notice and this permission notice appear in supporting documentation, and
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* that the name of the copyright holders not be used in advertising or
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* publicity pertaining to distribution of the software without specific,
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* written prior permission. The copyright holders make no representations
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* about the suitability of this software for any purpose. It is provided "as
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* is" without express or implied warranty.
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*
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* THE COPYRIGHT HOLDERS DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
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* INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO
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* EVENT SHALL THE COPYRIGHT HOLDERS BE LIABLE FOR ANY SPECIAL, INDIRECT OR
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* CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE,
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* DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER
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* TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE
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* OF THIS SOFTWARE.
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*/
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#include <stdint.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <math.h>
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#include <time.h>
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#include <pty.h>
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#include <ctype.h>
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#include <cairo.h>
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#include <glib.h>
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#include <linux/input.h>
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#include <GL/gl.h>
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#include <eagle.h>
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#include "wayland-client.h"
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#include "wayland-glib.h"
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#include "cairo-util.h"
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#include "window.h"
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static const char gem_device[] = "/dev/dri/card0";
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static const char socket_name[] = "\0wayland";
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#define MOD_SHIFT 0x01
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#define MOD_ALT 0x02
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#define MOD_CTRL 0x04
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struct terminal {
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struct window *window;
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struct wl_display *display;
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int redraw_scheduled, redraw_pending;
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char *data;
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int width, height, tail, row, column, total_rows;
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int fd, master;
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struct buffer *buffer;
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GIOChannel *channel;
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uint32_t modifiers;
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char escape[64];
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int escape_length;
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int state;
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};
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static void
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terminal_draw_contents(struct terminal *terminal)
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{
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struct rectangle rectangle;
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cairo_surface_t *surface;
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cairo_t *cr;
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cairo_font_extents_t extents;
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int i, row;
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window_get_child_rectangle(terminal->window, &rectangle);
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surface = cairo_image_surface_create(CAIRO_FORMAT_ARGB32,
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rectangle.width, rectangle.height);
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cr = cairo_create(surface);
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cairo_set_operator(cr, CAIRO_OPERATOR_SOURCE);
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cairo_set_source_rgba(cr, 0, 0, 0, 0.9);
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cairo_paint(cr);
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cairo_set_operator(cr, CAIRO_OPERATOR_OVER);
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cairo_set_source_rgba(cr, 0, 0.5, 0, 1);
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cairo_select_font_face (cr, "mono",
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CAIRO_FONT_SLANT_NORMAL,
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CAIRO_FONT_WEIGHT_NORMAL);
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cairo_set_font_size(cr, 14);
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cairo_font_extents(cr, &extents);
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for (i = 0; i < terminal->total_rows; i++) {
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row = (terminal->tail + i) % terminal->height;
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cairo_move_to(cr, 0, extents.ascent + extents.height * i);
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cairo_show_text(cr, &terminal->data[row * (terminal->width + 1)]);
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}
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cairo_destroy(cr);
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terminal->buffer = buffer_create_from_cairo_surface(terminal->fd, surface);
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cairo_surface_destroy(surface);
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window_copy(terminal->window,
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&rectangle,
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terminal->buffer->name, terminal->buffer->stride);
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}
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static void
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terminal_draw(struct terminal *terminal)
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{
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window_draw(terminal->window);
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terminal_draw_contents(terminal);
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wl_display_commit(terminal->display, 0);
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}
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static gboolean
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idle_redraw(void *data)
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{
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struct terminal *terminal = data;
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terminal_draw(terminal);
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return FALSE;
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}
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#define STATE_NORMAL 0
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#define STATE_ESCAPE 1
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static void
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terminal_data(struct terminal *terminal, const char *data, size_t length);
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static void
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terminal_schedule_redraw(struct terminal *terminal)
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{
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if (!terminal->redraw_scheduled) {
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g_idle_add(idle_redraw, terminal);
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terminal->redraw_scheduled = 1;
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} else {
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terminal->redraw_pending = 1;
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}
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}
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static void
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handle_escape(struct terminal *terminal)
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{
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char *row;
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int i, j;
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terminal->escape[terminal->escape_length++] = '\0';
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if (strcmp(terminal->escape, "\e[J") == 0) {
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row = &terminal->data[terminal->row * (terminal->width + 1)];
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memset(&row[terminal->column], 0, terminal->width - terminal->column);
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for (i = terminal->total_rows; i < terminal->height; i++) {
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j = terminal->row + i;
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if (j >= terminal->height)
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j -= terminal->height;
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row = &terminal->data[j * (terminal->width + 1)];
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memset(row, 0, terminal->width);
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}
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} else if (strcmp(terminal->escape, "\e[H") == 0) {
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terminal->row = terminal->tail;
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terminal->total_rows = 1;
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terminal->column = 0;
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}
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}
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static void
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terminal_data(struct terminal *terminal, const char *data, size_t length)
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{
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int i;
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char *row;
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for (i = 0; i < length; i++) {
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row = &terminal->data[terminal->row * (terminal->width + 1)];
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if (terminal->state == STATE_ESCAPE) {
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terminal->escape[terminal->escape_length++] = data[i];
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if (terminal->escape_length == 2 && data[i] != '[') {
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/* Bad escape sequence. */
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terminal->state = STATE_NORMAL;
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goto cancel_escape;
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}
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if (isalpha(data[i])) {
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terminal->state = STATE_NORMAL;
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handle_escape(terminal);
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}
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continue;
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}
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cancel_escape:
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switch (data[i]) {
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case '\r':
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terminal->column = 0;
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break;
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case '\n':
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terminal->column = 0;
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terminal->row++;
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if (terminal->row == terminal->height)
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terminal->row = 0;
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if (terminal->total_rows == terminal->height) {
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memset(&terminal->data[terminal->row * (terminal->width + 1)],
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0, terminal->width);
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terminal->tail++;
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} else {
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terminal->total_rows++;
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}
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if (terminal->tail == terminal->height)
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terminal->tail = 0;
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break;
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case '\t':
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memset(&row[terminal->column], ' ', -terminal->column & 7);
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terminal->column = (terminal->column + 7) & ~7;
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break;
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case '\e':
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terminal->state = STATE_ESCAPE;
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terminal->escape[0] = '\e';
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terminal->escape_length = 1;
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break;
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default:
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if (terminal->column < terminal->width)
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row[terminal->column++] = data[i];
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break;
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}
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}
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terminal_schedule_redraw(terminal);
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}
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static void
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resize_handler(struct window *window, int32_t width, int32_t height, void *data)
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{
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struct terminal *terminal = data;
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terminal_schedule_redraw(terminal);
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}
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static void
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acknowledge_handler(struct window *window, uint32_t key, void *data)
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{
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struct terminal *terminal = data;
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terminal->redraw_scheduled = 0;
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buffer_destroy(terminal->buffer, terminal->fd);
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if (terminal->redraw_pending) {
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terminal->redraw_pending = 0;
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terminal_schedule_redraw(terminal);
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}
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}
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struct key {
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int code[4];
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} evdev_keymap[] = {
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{ { 0, 0 } }, /* 0 */
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{ { 0x1b, 0x1b } },
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{ { '1', '!' } },
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{ { '2', '@' } },
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{ { '3', '#' } },
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{ { '4', '$' } },
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{ { '5', '%' } },
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{ { '6', '^' } },
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{ { '7', '&' } },
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{ { '8', '*' } },
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{ { '9', '(' } },
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{ { '0', ')' } },
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{ { '-', '_' } },
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{ { '=', '+' } },
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{ { '\b', '\b' } },
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{ { '\t', '\t' } },
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{ { 'q', 'Q' } }, /* 16 */
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{ { 'w', 'W', 0x17 } },
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{ { 'e', 'E', 0x05 } },
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{ { 'r', 'R', 0x12 } },
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{ { 't', 'T' } },
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{ { 'y', 'Y' } },
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{ { 'u', 'U', 0x15 } },
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{ { 'i', 'I' } },
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{ { 'o', 'O' } },
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{ { 'p', 'P', 0x10 } },
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{ { '[', '{' } },
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{ { ']', '}' } },
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{ { '\n', '\n' } },
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{ { 0, 0 } },
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{ { 'a', 'A', 0x01} },
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{ { 's', 'S', 0x13 } },
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{ { 'd', 'D', 0x04 } }, /* 32 */
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{ { 'f', 'F', 0x06 } },
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{ { 'g', 'G' } },
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{ { 'h', 'H' } },
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{ { 'j', 'J', 0x0a } },
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{ { 'k', 'K', 0x0b } },
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{ { 'l', 'L', 0x0c } },
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{ { ';', ':' } },
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{ { '\'', '"' } },
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{ { '`', '~' } },
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{ { 0, 0 } },
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{ { '\\', '|' } },
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{ { 'z', 'Z' } },
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{ { 'x', 'X' } },
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{ { 'c', 'C' } },
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{ { 'v', 'V' } },
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{ { 'b', 'B', 0x02 } }, /* 48 */
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{ { 'n', 'N', 0x0e } },
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{ { 'm', 'M', 0x0d } },
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{ { ',', '<' } },
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{ { '.', '>' } },
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{ { '/', '?' } },
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{ { 0, 0 } },
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{ { '*', '*' } },
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{ { 0, 0 } },
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{ { ' ', ' ' } },
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{ { 0, 0 } }
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/* 59 */
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};
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#define ARRAY_LENGTH(a) (sizeof (a) / sizeof (a)[0])
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static void
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key_handler(struct window *window, uint32_t key, uint32_t state, void *data)
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{
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struct terminal *terminal = data;
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uint32_t mod = 0;
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char c;
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switch (key) {
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case KEY_LEFTSHIFT:
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case KEY_RIGHTSHIFT:
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mod = MOD_SHIFT;
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break;
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case KEY_LEFTCTRL:
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case KEY_RIGHTCTRL:
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mod = MOD_CTRL;
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break;
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case KEY_LEFTALT:
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case KEY_RIGHTALT:
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mod = MOD_ALT;
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break;
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default:
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if (key < ARRAY_LENGTH(evdev_keymap)) {
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if (terminal->modifiers & MOD_CTRL)
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c = evdev_keymap[key].code[2];
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else if (terminal->modifiers & MOD_SHIFT)
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c = evdev_keymap[key].code[1];
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else
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c = evdev_keymap[key].code[0];
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if (state && c)
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write(terminal->master, &c, 1);
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}
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break;
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}
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if (state)
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terminal->modifiers |= mod;
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else
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terminal->modifiers &= ~mod;
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}
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static struct terminal *
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terminal_create(struct wl_display *display, int fd)
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{
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struct terminal *terminal;
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int size;
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terminal = malloc(sizeof *terminal);
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if (terminal == NULL)
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return terminal;
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memset(terminal, 0, sizeof *terminal);
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terminal->fd = fd;
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terminal->window = window_create(display, fd, "Wayland Terminal",
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500, 100, 500, 400);
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terminal->display = display;
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terminal->redraw_scheduled = 1;
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terminal->width = 80;
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terminal->height = 25;
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terminal->total_rows = 1;
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size = (terminal->width + 1) * terminal->height;
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terminal->data = malloc(size);
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memset(terminal->data, 0, size);
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window_set_resize_handler(terminal->window, resize_handler, terminal);
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window_set_acknowledge_handler(terminal->window, acknowledge_handler, terminal);
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window_set_key_handler(terminal->window, key_handler, terminal);
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return terminal;
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}
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static gboolean
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io_handler(GIOChannel *source,
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GIOCondition condition,
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gpointer data)
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{
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struct terminal *terminal = data;
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gchar buffer[256];
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gsize bytes_read;
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GError *error = NULL;
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g_io_channel_read_chars(source, buffer, sizeof buffer,
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&bytes_read, &error);
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terminal_data(terminal, buffer, bytes_read);
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return TRUE;
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}
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static int
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terminal_run(struct terminal *terminal, const char *path)
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{
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int master, slave;
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pid_t pid;
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pid = forkpty(&master, NULL, NULL, NULL);
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if (pid == 0) {
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close(master);
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if (execl(path, path, NULL)) {
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printf("exec failed: %m\n");
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exit(EXIT_FAILURE);
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}
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}
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close(slave);
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terminal->master = master;
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terminal->channel = g_io_channel_unix_new(master);
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fcntl(master, F_SETFL, O_NONBLOCK);
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g_io_add_watch(terminal->channel, G_IO_IN,
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io_handler, terminal);
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return 0;
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}
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int main(int argc, char *argv[])
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{
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struct wl_display *display;
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int fd;
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GMainLoop *loop;
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GSource *source;
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struct terminal *terminal;
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fd = open(gem_device, O_RDWR);
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if (fd < 0) {
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fprintf(stderr, "drm open failed: %m\n");
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return -1;
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}
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display = wl_display_create(socket_name, sizeof socket_name);
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if (display == NULL) {
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fprintf(stderr, "failed to create display: %m\n");
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return -1;
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}
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loop = g_main_loop_new(NULL, FALSE);
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source = wl_glib_source_new(display);
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g_source_attach(source, NULL);
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terminal = terminal_create(display, fd);
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terminal_run(terminal, "/bin/bash");
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terminal_draw(terminal);
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g_main_loop_run(loop);
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return 0;
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}
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