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Diffstat (limited to 'clients/terminal.c')
| -rw-r--r-- | clients/terminal.c | 2826 |
1 files changed, 2826 insertions, 0 deletions
diff --git a/clients/terminal.c b/clients/terminal.c new file mode 100644 index 00000000..cec1d67e --- /dev/null +++ b/clients/terminal.c @@ -0,0 +1,2826 @@ +/* + * 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 <config.h> + +#include <stdbool.h> +#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 <sys/epoll.h> +#include <wchar.h> +#include <locale.h> + +#include <wayland-client.h> + +#include "../shared/config-parser.h" +#include "window.h" + +static int option_fullscreen; +static char *option_font; +static int option_font_size; +static char *option_term; +static char *option_shell; + +static struct wl_list terminal_list; + +static struct terminal * +terminal_create(struct display *display); +static void +terminal_destroy(struct terminal *terminal); +static int +terminal_run(struct terminal *terminal, const char *path); + +#define TERMINAL_DRAW_SINGLE_WIDE_CHARACTERS \ + " !\"#$%&'()*+,-./" \ + "0123456789" \ + ":;<=>?@" \ + "ABCDEFGHIJKLMNOPQRSTUVWXYZ" \ + "[\\]^_`" \ + "abcdefghijklmnopqrstuvwxyz" \ + "{|}~" \ + "" + +#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; + uint32_t unicode; +}; + +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; + machine->unicode = c; + } 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; + machine->unicode = c & 0x1f; + } else if((c & 0xF0) == 0xE0) { + /* start of three byte sequence */ + machine->s.byte[machine->len++] = c; + machine->state = utf8state_expect2; + machine->unicode = c & 0x0f; + } else if((c & 0xF8) == 0xF0) { + /* start of four byte sequence */ + machine->s.byte[machine->len++] = c; + machine->state = utf8state_expect3; + machine->unicode = c & 0x07; + } else { + /* overlong encoding, reject */ + machine->state = utf8state_reject; + } + break; + case utf8state_expect3: + machine->s.byte[machine->len++] = c; + machine->unicode = (machine->unicode << 6) | (c & 0x3f); + 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; + machine->unicode = (machine->unicode << 6) | (c & 0x3f); + 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; + machine->unicode = (machine->unicode << 6) | (c & 0x3f); + 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; +} + +static uint32_t +get_unicode(union utf8_char utf8) +{ + struct utf8_state_machine machine; + int i; + + init_state_machine(&machine); + for (i = 0; i < 4; i++) { + utf8_next_char(&machine, utf8.byte[i]); + if (machine.state == utf8state_accept || + machine.state == utf8state_reject) + break; + } + + if (machine.state == utf8state_reject) + return 0xfffd; + + return machine.unicode; +} + +static bool +is_wide(union utf8_char utf8) +{ + uint32_t unichar = get_unicode(utf8); + return wcwidth(unichar) > 1; +} + +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, }}}, /* POUND: £ */ + {{{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_LB: └ */ + {{{'n', 0, }}, {{0xE2, 0x94, 0xBC, 0}}}, /* CROSS: ┼ */ + {{{'o', 0, }}, {{0xE2, 0x8E, 0xBA, 0}}}, /* Horiz. Scan Line 1: ⎺ */ + {{{'p', 0, }}, {{0xE2, 0x8E, 0xBB, 0}}}, /* Horiz. Scan Line 3: ⎻ */ + {{{'q', 0, }}, {{0xE2, 0x94, 0x80, 0}}}, /* Horiz. Scan Line 5: ─ */ + {{{'r', 0, }}, {{0xE2, 0x8E, 0xBC, 0}}}, /* Horiz. Scan Line 7: ⎼ */ + {{{'s', 0, }}, {{0xE2, 0x8E, 0xBD, 0}}}, /* Horiz. Scan Line 9: ⎽ */ + {{{'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: π */ + {{{'|', 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[] = { + { XKB_KEY_Left, 1, '[', 'D' }, + { XKB_KEY_Right, 1, '[', 'C' }, + { XKB_KEY_Up, 1, '[', 'A' }, + { XKB_KEY_Down, 1, '[', 'B' }, + { XKB_KEY_Home, 1, '[', 'H' }, + { XKB_KEY_End, 1, '[', 'F' }, + { 0, 0, 0, 0 } +}; +static struct key_map KM_APPLICATION[] = { + { XKB_KEY_Left, 1, 'O', 'D' }, + { XKB_KEY_Right, 1, 'O', 'C' }, + { XKB_KEY_Up, 1, 'O', 'A' }, + { XKB_KEY_Down, 1, 'O', 'B' }, + { XKB_KEY_Home, 1, 'O', 'H' }, + { XKB_KEY_End, 1, 'O', 'F' }, + { XKB_KEY_KP_Enter, 1, 'O', 'M' }, + { XKB_KEY_KP_Multiply, 1, 'O', 'j' }, + { XKB_KEY_KP_Add, 1, 'O', 'k' }, + { XKB_KEY_KP_Separator, 1, 'O', 'l' }, + { XKB_KEY_KP_Subtract, 1, 'O', 'm' }, + { XKB_KEY_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 + +enum { + SELECT_NONE, + SELECT_CHAR, + SELECT_WORD, + SELECT_LINE +}; + +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 send_cursor_position; + 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; + struct color_scheme *color_scheme; + struct terminal_color color_table[256]; + cairo_font_extents_t extents; + double average_width; + cairo_scaled_font_t *font_normal, *font_bold; + uint32_t hide_cursor_serial; + + struct wl_data_source *selection; + uint32_t button_time; + int dragging, click_count; + int selection_start_x, selection_start_y; + int selection_end_x, selection_end_y; + int selection_start_row, selection_start_col; + int selection_end_row, selection_end_col; + struct wl_list link; +}; + +/* 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 void +terminal_decode_attr(struct terminal *terminal, int row, int col, + union decoded_attr *decoded) +{ + struct attr attr; + int foreground, background, tmp; + + decoded->attr.s = 0; + if (((row == terminal->selection_start_row && + col >= terminal->selection_start_col) || + row > terminal->selection_start_row) && + ((row == terminal->selection_end_row && + col < terminal->selection_end_col) || + row < terminal->selection_end_row)) + 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) && + window_has_focus(terminal->window) && 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); + } + } + + terminal->selection_start_row -= d; + terminal->selection_end_row -= d; +} + +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 (terminal->width == width && terminal->height == height) + return; + + data_pitch = width * sizeof(union utf8_char); + size = data_pitch * height; + data = zalloc(size); + attr_pitch = width * sizeof(struct attr); + data_attr = malloc(attr_pitch * height); + tab_ruler = zalloc(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; + i = 1 + terminal->row - height; + if (i > 0) { + terminal->start = (terminal->start + i) % terminal->height; + terminal->row = terminal->row - i; + } + } 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->start = 0; + 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->average_width; + rows = (height - m) / (int32_t) terminal->extents.height; + + if (!window_is_fullscreen(terminal->window) && + !window_is_maximized(terminal->window)) { + width = columns * terminal->average_width + 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 (window_is_fullscreen(terminal->window) || + window_is_maximized(terminal->window)) + return; + + m = 2 * terminal->margin; + width = columns * terminal->average_width + m; + height = rows * terminal->extents.height + m; + + frame_set_child_size(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"); + if (fp == NULL){ + close(fd); + return; + } + for (row = 0; row < terminal->height; row++) { + p_row = terminal_get_row(terminal, row); + for (col = 0; col < terminal->width; col++) { + if (p_row[col].ch == 0x200B) /* space glyph */ + continue; + /* 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); + if (len > 0) + fwrite(p_row[col].byte, 1, len, fp); + if (len == 0 || col == terminal->width - 1) { + fwrite("\n", 1, 1, fp); + break; + } + } + } + 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, cursor_x, cursor_y; + 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; + double average_width; + double unichar_width; + + surface = window_get_surface(terminal->window); + widget_get_allocation(terminal->widget, &allocation); + cr = widget_cairo_create(terminal->widget); + 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; + average_width = terminal->average_width; + side_margin = (allocation.width - terminal->width * average_width) / 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++) { + 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.bg == terminal->color_scheme->border) + continue; + + if (is_wide(p_row[col])) + unichar_width = 2 * average_width; + else + unichar_width = average_width; + + terminal_set_color(terminal, cr, attr.attr.bg); + cairo_move_to(cr, col * average_width, + row * extents.height); + cairo_rel_line_to(cr, unichar_width, 0); + cairo_rel_line_to(cr, 0, extents.height); + cairo_rel_line_to(cr, -unichar_width, 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 * average_width; + 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 + average_width, (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) && + !window_has_focus(terminal->window)) { + d = 0.5; + + cairo_set_line_width(cr, 1); + cairo_move_to(cr, terminal->column * average_width + d, + terminal->row * extents.height + d); + cairo_rel_line_to(cr, average_width - 2 * d, 0); + cairo_rel_line_to(cr, 0, extents.height - 2 * d); + cairo_rel_line_to(cr, -average_width + 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); + + if (terminal->send_cursor_position) { + cursor_x = side_margin + allocation.x + + terminal->column * average_width; + cursor_y = top_margin + allocation.y + + terminal->row * extents.height; + window_set_text_cursor_position(terminal->window, + cursor_x, cursor_y); + terminal->send_cursor_position = 0; + } +} + +static void +terminal_write(struct terminal *terminal, const char *data, size_t length) +{ + if (write(terminal->master, data, length) < 0) + abort(); + terminal->send_cursor_position = 1; +} + +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 12: /* Very visible cursor (CVVIS) */ + /* FIXME: What do we do here. */ + break; + case 25: + if (sr) terminal->mode |= MODE_SHOW_CURSOR; + else terminal->mode &= ~MODE_SHOW_CURSOR; + break; + case 1034: /* smm/rmm, meta mode on/off */ + /* ignore */ + 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; + case 1049: /* rmcup/smcup, alternate screen */ + /* Ignore. Should be possible to implement, + * but it's kind of annoying. */ + 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; + case 7: /* shell cwd as uri */ + break; + default: + fprintf(stderr, "Unknown OSC escape code %d, text %s\n", + code, p); + 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->mode & MODE_IRM) + terminal_shift_line(terminal, +1); + + if (row[terminal->column].byte[0] == '\0') { + row[terminal->column].byte[0] = ' '; + row[terminal->column].byte[1] = '\0'; + attr_row[terminal->column] = terminal->curr_attr; + } + + terminal->column++; + if (terminal->tab_ruler[terminal->column]) break; + } + 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; + case '\0': + 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; + + /* cursor jump for wide character. */ + if (is_wide(utf8)) + row[terminal->column++].ch = 0x200B; /* space glyph */ + + 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 const char text_mime_type[] = "text/plain;charset=utf-8"; + +static void +data_handler(struct window *window, + struct input *input, + float x, float y, const char **types, void *data) +{ + int i, has_text = 0; + + if (!types) + return; + for (i = 0; types[i]; i++) + if (strcmp(types[i], text_mime_type) == 0) + has_text = 1; + + if (!has_text) { + input_accept(input, NULL); + } else { + input_accept(input, text_mime_type); + } +} + +static void +drop_handler(struct window *window, struct input *input, + int32_t x, int32_t y, void *data) +{ + struct terminal *terminal = data; + + input_receive_drag_data_to_fd(input, text_mime_type, terminal->master); +} + +static void +fullscreen_handler(struct window *window, void *data) +{ + struct terminal *terminal = data; + + window_set_fullscreen(window, !window_is_fullscreen(terminal->window)); +} + +static void +close_handler(struct window *window, void *data) +{ + struct terminal *terminal = data; + + terminal_destroy(terminal); +} + +static int +handle_bound_key(struct terminal *terminal, + struct input *input, uint32_t sym, uint32_t time) +{ + struct terminal *new_terminal; + + switch (sym) { + case XKB_KEY_X: + /* Cut selection; terminal doesn't do cut, fall + * through to copy. */ + case XKB_KEY_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, + display_get_serial(terminal->display)); + return 1; + case XKB_KEY_V: + input_receive_selection_data_to_fd(input, + "text/plain;charset=utf-8", + terminal->master); + + return 1; + + case XKB_KEY_N: + new_terminal = terminal_create(terminal->display); + if (terminal_run(new_terminal, option_shell)) + terminal_destroy(new_terminal); + + return 1; + + default: + return 0; + } +} + +static void +key_handler(struct window *window, struct input *input, uint32_t time, + uint32_t key, uint32_t sym, enum wl_keyboard_key_state state, + void *data) +{ + struct terminal *terminal = data; + char ch[MAX_RESPONSE]; + uint32_t modifiers, serial; + int ret, len = 0; + bool convert_utf8 = true; + + modifiers = input_get_modifiers(input); + if ((modifiers & MOD_CONTROL_MASK) && + (modifiers & MOD_SHIFT_MASK) && + state == WL_KEYBOARD_KEY_STATE_PRESSED && + handle_bound_key(terminal, input, sym, time)) + return; + + /* Map keypad symbols to 'normal' equivalents before processing */ + switch (sym) { + case XKB_KEY_KP_Space: + sym = XKB_KEY_space; + break; + case XKB_KEY_KP_Tab: + sym = XKB_KEY_Tab; + break; + case XKB_KEY_KP_Enter: + sym = XKB_KEY_Return; + break; + case XKB_KEY_KP_Left: + sym = XKB_KEY_Left; + break; + case XKB_KEY_KP_Up: + sym = XKB_KEY_Up; + break; + case XKB_KEY_KP_Right: + sym = XKB_KEY_Right; + break; + case XKB_KEY_KP_Down: + sym = XKB_KEY_Down; + break; + case XKB_KEY_KP_Equal: + sym = XKB_KEY_equal; + break; + case XKB_KEY_KP_Multiply: + sym = XKB_KEY_asterisk; + break; + case XKB_KEY_KP_Add: + sym = XKB_KEY_plus; + break; + case XKB_KEY_KP_Separator: + /* Note this is actually locale-dependent and should mostly be + * a comma. But leave it as period until we one day start + * doing the right thing. */ + sym = XKB_KEY_period; + break; + case XKB_KEY_KP_Subtract: + sym = XKB_KEY_minus; + break; + case XKB_KEY_KP_Decimal: + sym = XKB_KEY_period; + break; + case XKB_KEY_KP_Divide: + sym = XKB_KEY_slash; + break; + case XKB_KEY_KP_0: + case XKB_KEY_KP_1: + case XKB_KEY_KP_2: + case XKB_KEY_KP_3: + case XKB_KEY_KP_4: + case XKB_KEY_KP_5: + case XKB_KEY_KP_6: + case XKB_KEY_KP_7: + case XKB_KEY_KP_8: + case XKB_KEY_KP_9: + sym = (sym - XKB_KEY_KP_0) + XKB_KEY_0; + break; + default: + break; + } + + switch (sym) { + case XKB_KEY_BackSpace: + if (modifiers & MOD_ALT_MASK) + ch[len++] = 0x1b; + ch[len++] = 0x7f; + break; + case XKB_KEY_Tab: + case XKB_KEY_Linefeed: + case XKB_KEY_Clear: + case XKB_KEY_Pause: + case XKB_KEY_Scroll_Lock: + case XKB_KEY_Sys_Req: + case XKB_KEY_Escape: + ch[len++] = sym & 0x7f; + break; + + case XKB_KEY_Return: + if (terminal->mode & MODE_LF_NEWLINE) { + ch[len++] = 0x0D; + ch[len++] = 0x0A; + } else { + ch[len++] = 0x0D; + } + break; + + case XKB_KEY_Shift_L: + case XKB_KEY_Shift_R: + case XKB_KEY_Control_L: + case XKB_KEY_Control_R: + case XKB_KEY_Alt_L: + case XKB_KEY_Alt_R: + case XKB_KEY_Meta_L: + case XKB_KEY_Meta_R: + case XKB_KEY_Super_L: + case XKB_KEY_Super_R: + case XKB_KEY_Hyper_L: + case XKB_KEY_Hyper_R: + break; + + case XKB_KEY_Insert: + len = function_key_response('[', 2, modifiers, '~', ch); + break; + case XKB_KEY_Delete: + if (terminal->mode & MODE_DELETE_SENDS_DEL) { + ch[len++] = '\x04'; + } else { + len = function_key_response('[', 3, modifiers, '~', ch); + } + break; + case XKB_KEY_Page_Up: + len = function_key_response('[', 5, modifiers, '~', ch); + break; + case XKB_KEY_Page_Down: + len = function_key_response('[', 6, modifiers, '~', ch); + break; + case XKB_KEY_F1: + len = function_key_response('O', 1, modifiers, 'P', ch); + break; + case XKB_KEY_F2: + len = function_key_response('O', 1, modifiers, 'Q', ch); + break; + case XKB_KEY_F3: + len = function_key_response('O', 1, modifiers, 'R', ch); + break; + case XKB_KEY_F4: + len = function_key_response('O', 1, modifiers, 'S', ch); + break; + case XKB_KEY_F5: + len = function_key_response('[', 15, modifiers, '~', ch); + break; + case XKB_KEY_F6: + len = function_key_response('[', 17, modifiers, '~', ch); + break; + case XKB_KEY_F7: + len = function_key_response('[', 18, modifiers, '~', ch); + break; + case XKB_KEY_F8: + len = function_key_response('[', 19, modifiers, '~', ch); + break; + case XKB_KEY_F9: + len = function_key_response('[', 20, modifiers, '~', ch); + break; + case XKB_KEY_F10: + len = function_key_response('[', 21, modifiers, '~', ch); + break; + case XKB_KEY_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; + } + if (modifiers & MOD_ALT_MASK) { + if (terminal->mode & MODE_ALT_SENDS_ESC) { + ch[len++] = 0x1b; + } else { + sym = sym | 0x80; + convert_utf8 = false; + } + } + + if ((sym < 128) || + (!convert_utf8 && sym < 256)) { + ch[len++] = sym; + } else { + ret = xkb_keysym_to_utf8(sym, ch + len, + MAX_RESPONSE - len); + if (ret < 0) + fprintf(stderr, + "Warning: buffer too small to encode " + "UTF8 character\n"); + else + len += ret; + } + + break; + } + + if (state == WL_KEYBOARD_KEY_STATE_PRESSED && len > 0) { + terminal_write(terminal, ch, len); + + /* Hide cursor, except if this was coming from a + * repeating key press. */ + serial = display_get_serial(terminal->display); + if (terminal->hide_cursor_serial != serial) { + input_set_pointer_image(input, CURSOR_BLANK); + terminal->hide_cursor_serial = serial; + } + } +} + +static void +keyboard_focus_handler(struct window *window, + struct input *device, void *data) +{ + struct terminal *terminal = data; + + window_schedule_redraw(terminal->window); +} + +static int wordsep(int ch) +{ + const char extra[] = "-,./?%&#:_=+@~"; + + if (ch > 127) + return 1; + + return ch == 0 || !(isalpha(ch) || isdigit(ch) || strchr(extra, ch)); +} + +static int +recompute_selection(struct terminal *terminal) +{ + struct rectangle allocation; + int col, x, width, height; + int start_row, end_row; + int word_start, eol; + int side_margin, top_margin; + int start_x, end_x; + int cw, ch; + union utf8_char *data; + + cw = terminal->average_width; + ch = terminal->extents.height; + widget_get_allocation(terminal->widget, &allocation); + width = terminal->width * cw; + height = terminal->height * ch; + side_margin = allocation.x + (allocation.width - width) / 2; + top_margin = allocation.y + (allocation.height - height) / 2; + + start_row = (terminal->selection_start_y - top_margin + ch) / ch - 1; + end_row = (terminal->selection_end_y - top_margin + ch) / ch - 1; + + if (start_row < end_row || + (start_row == end_row && + terminal->selection_start_x < terminal->selection_end_x)) { + terminal->selection_start_row = start_row; + terminal->selection_end_row = end_row; + start_x = terminal->selection_start_x; + end_x = terminal->selection_end_x; + } else { + terminal->selection_start_row = end_row; + terminal->selection_end_row = start_row; + start_x = terminal->selection_end_x; + end_x = terminal->selection_start_x; + } + + eol = 0; + if (terminal->selection_start_row < 0) { + terminal->selection_start_row = 0; + terminal->selection_start_col = 0; + } else { + x = side_margin + cw / 2; + data = terminal_get_row(terminal, + terminal->selection_start_row); + word_start = 0; + for (col = 0; col < terminal->width; col++, x += cw) { + if (col == 0 || wordsep(data[col - 1].ch)) + word_start = col; + if (data[col].ch != 0) + eol = col + 1; + if (start_x < x) + break; + } + + switch (terminal->dragging) { + case SELECT_LINE: + terminal->selection_start_col = 0; + break; + case SELECT_WORD: + terminal->selection_start_col = word_start; + break; + case SELECT_CHAR: + terminal->selection_start_col = col; + break; + } + } + + if (terminal->selection_end_row >= terminal->height) { + terminal->selection_end_row = terminal->height; + terminal->selection_end_col = 0; + } else { + x = side_margin + cw / 2; + data = terminal_get_row(terminal, terminal->selection_end_row); + for (col = 0; col < terminal->width; col++, x += cw) { + if (terminal->dragging == SELECT_CHAR && end_x < x) + break; + if (terminal->dragging == SELECT_WORD && + end_x < x && wordsep(data[col].ch)) + break; + } + terminal->selection_end_col = col; + } + + if (terminal->selection_end_col != terminal->selection_start_col || + terminal->selection_start_row != terminal->selection_end_row) { + col = terminal->selection_end_col; + if (col > 0 && data[col - 1].ch == 0) + terminal->selection_end_col = terminal->width; + data = terminal_get_row(terminal, terminal->selection_start_row); + if (data[terminal->selection_start_col].ch == 0) + terminal->selection_start_col = eol; + } + + return 1; +} + +static void +button_handler(struct widget *widget, + struct input *input, uint32_t time, + uint32_t button, + enum wl_pointer_button_state state, void *data) +{ + struct terminal *terminal = data; + + switch (button) { + case 272: + if (state == WL_POINTER_BUTTON_STATE_PRESSED) { + + if (time - terminal->button_time < 500) + terminal->click_count++; + else + terminal->click_count = 1; + + terminal->button_time = time; + terminal->dragging = + (terminal->click_count - 1) % 3 + SELECT_CHAR; + + 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; + if (recompute_selection(terminal)) + widget_schedule_redraw(widget); + } else { + terminal->dragging = SELECT_NONE; + } + break; + } +} + +static int +enter_handler(struct widget *widget, + struct input *input, float x, float y, void *data) +{ + return CURSOR_IBEAM; +} + +static int +motion_handler(struct widget *widget, + struct input *input, uint32_t time, + float x, float y, void *data) +{ + struct terminal *terminal = data; + + if (terminal->dragging) { + input_get_position(input, + &terminal->selection_end_x, + &terminal->selection_end_y); + + if (recompute_selection(terminal)) + widget_schedule_redraw(widget); + } + + return CURSOR_IBEAM; +} + +static void +output_handler(struct window *window, struct output *output, int enter, + void *data) +{ + if (enter) + window_set_buffer_transform(window, output_get_transform(output)); + window_set_buffer_scale(window, window_get_output_scale(window)); + window_schedule_redraw(window); +} + +#ifndef howmany +#define howmany(x, y) (((x) + ((y) - 1)) / (y)) +#endif + +static struct terminal * +terminal_create(struct display *display) +{ + struct terminal *terminal; + cairo_surface_t *surface; + cairo_t *cr; + cairo_text_extents_t text_extents; + + terminal = xzalloc(sizeof *terminal); + 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); + window_set_fullscreen_handler(terminal->window, fullscreen_handler); + window_set_output_handler(terminal->window, output_handler); + window_set_close_handler(terminal->window, close_handler); + + window_set_data_handler(terminal->window, data_handler); + window_set_drop_handler(terminal->window, drop_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_enter_handler(terminal->widget, enter_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, option_font_size); + cairo_select_font_face (cr, option_font, + 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, option_font, + 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); + + /* Compute the average ascii glyph width */ + cairo_text_extents(cr, TERMINAL_DRAW_SINGLE_WIDE_CHARACTERS, + &text_extents); + terminal->average_width = howmany + (text_extents.width, + strlen(TERMINAL_DRAW_SINGLE_WIDE_CHARACTERS)); + terminal->average_width = ceil(terminal->average_width); + + cairo_destroy(cr); + cairo_surface_destroy(surface); + + terminal_resize(terminal, 20, 5); /* Set minimum size first */ + terminal_resize(terminal, 80, 25); + + wl_list_insert(terminal_list.prev, &terminal->link); + + return terminal; +} + +static void +terminal_destroy(struct terminal *terminal) +{ + display_unwatch_fd(terminal->display, terminal->master); + window_destroy(terminal->window); + close(terminal->master); + wl_list_remove(&terminal->link); + + if (wl_list_empty(&terminal_list)) + display_exit(terminal->display); + + free(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) { + terminal_destroy(terminal); + return; + } + + len = read(terminal->master, buffer, sizeof buffer); + if (len < 0) + terminal_destroy(terminal); + else + 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", option_term, 1); + setenv("COLORTERM", option_term, 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, option_fullscreen); + if (!window_is_fullscreen(terminal->window)) + terminal_resize(terminal, 80, 24); + + return 0; +} + +static const struct weston_option terminal_options[] = { + { WESTON_OPTION_BOOLEAN, "fullscreen", 'f', &option_fullscreen }, + { WESTON_OPTION_STRING, "font", 0, &option_font }, + { WESTON_OPTION_STRING, "shell", 0, &option_shell }, +}; + +int main(int argc, char *argv[]) +{ + struct display *d; + struct terminal *terminal; + struct weston_config *config; + struct weston_config_section *s; + + /* as wcwidth is locale-dependent, + wcwidth needs setlocale call to function properly. */ + setlocale(LC_ALL, ""); + + option_shell = getenv("SHELL"); + if (!option_shell) + option_shell = "/bin/bash"; + + config = weston_config_parse("weston.ini"); + s = weston_config_get_section(config, "terminal", NULL, NULL); + weston_config_section_get_string(s, "font", &option_font, "mono"); + weston_config_section_get_int(s, "font-size", &option_font_size, 14); + weston_config_section_get_string(s, "term", &option_term, "xterm"); + weston_config_destroy(config); + + d = display_create(&argc, argv); + if (d == NULL) { + fprintf(stderr, "failed to create display: %m\n"); + return -1; + } + + wl_list_init(&terminal_list); + terminal = terminal_create(d); + if (terminal_run(terminal, option_shell)) + exit(EXIT_FAILURE); + + display_run(d); + + return 0; +} |