+++ /dev/null
-/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
-
-/***
- This file is part of systemd.
-
- Copyright (C) 2014 David Herrmann <dh.herrmann@gmail.com>
-
- systemd is free software; you can redistribute it and/or modify it
- under the terms of the GNU Lesser General Public License as published by
- the Free Software Foundation; either version 2.1 of the License, or
- (at your option) any later version.
-
- systemd is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
- Lesser General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public License
- along with systemd; If not, see <http://www.gnu.org/licenses/>.
-***/
-
-/*
- * Terminal Screens
- * The term_screen layer implements the terminal-side. It handles all commands
- * returned by the seq-parser and applies them to its own pages.
- *
- * While there are a lot of legacy control-sequences, we only support a small
- * subset. There is no reason to implement unused codes like horizontal
- * scrolling.
- * If you implement new commands, make sure to document them properly.
- *
- * Standards:
- * ECMA-48
- * ANSI X3.64
- * ISO/IEC 6429
- * References:
- * http://www.vt100.net/emu/ctrlseq_dec.html
- * http://www.vt100.net/docs/vt100-ug/chapter3.html
- * http://www.vt100.net/docs/vt510-rm/chapter4
- * http://www.vt100.net/docs/vt510-rm/contents
- * http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
- * ASCII
- * http://en.wikipedia.org/wiki/C0_and_C1_control_codes
- * https://en.wikipedia.org/wiki/ANSI_color
- */
-
-#include <stdbool.h>
-#include <stdint.h>
-#include <stdlib.h>
-#include <xkbcommon/xkbcommon-keysyms.h>
-#include "macro.h"
-#include "term-internal.h"
-#include "util.h"
-#include "utf8.h"
-
-int term_screen_new(term_screen **out, term_screen_write_fn write_fn, void *write_fn_data, term_screen_cmd_fn cmd_fn, void *cmd_fn_data) {
- _cleanup_(term_screen_unrefp) term_screen *screen = NULL;
- int r;
-
- assert_return(out, -EINVAL);
-
- screen = new0(term_screen, 1);
- if (!screen)
- return -ENOMEM;
-
- screen->ref = 1;
- screen->age = 1;
- screen->write_fn = write_fn;
- screen->write_fn_data = write_fn_data;
- screen->cmd_fn = cmd_fn;
- screen->cmd_fn_data = cmd_fn_data;
- screen->flags = TERM_FLAG_7BIT_MODE;
- screen->conformance_level = TERM_CONFORMANCE_LEVEL_VT400;
- screen->g0 = &term_unicode_lower;
- screen->g1 = &term_unicode_upper;
- screen->g2 = &term_unicode_lower;
- screen->g3 = &term_unicode_upper;
- screen->state.gl = &screen->g0;
- screen->state.gr = &screen->g1;
- screen->saved = screen->state;
- screen->saved_alt = screen->saved;
-
- r = term_page_new(&screen->page_main);
- if (r < 0)
- return r;
-
- r = term_page_new(&screen->page_alt);
- if (r < 0)
- return r;
-
- r = term_parser_new(&screen->parser, false);
- if (r < 0)
- return r;
-
- r = term_history_new(&screen->history_main);
- if (r < 0)
- return r;
-
- screen->page = screen->page_main;
- screen->history = screen->history_main;
-
- *out = screen;
- screen = NULL;
- return 0;
-}
-
-term_screen *term_screen_ref(term_screen *screen) {
- if (!screen)
- return NULL;
-
- assert_return(screen->ref > 0, NULL);
-
- ++screen->ref;
- return screen;
-}
-
-term_screen *term_screen_unref(term_screen *screen) {
- if (!screen)
- return NULL;
-
- assert_return(screen->ref > 0, NULL);
-
- if (--screen->ref)
- return NULL;
-
- free(screen->answerback);
- free(screen->tabs);
- term_history_free(screen->history_main);
- term_page_free(screen->page_alt);
- term_page_free(screen->page_main);
- term_parser_free(screen->parser);
- free(screen);
-
- return NULL;
-}
-
-/*
- * Write-Helpers
- * Unfortunately, 7bit/8bit compat mode requires us to send C1 controls encoded
- * as 7bit if asked by the application. This is really used in the wild, so we
- * cannot fall back to "always 7bit".
- * screen_write() is the underlying backend which forwards any writes to the
- * users's callback. It's the users responsibility to buffer these and write
- * them out once their call to term_screen_feed_*() returns.
- * The SEQ_WRITE() and SEQ_WRITE_KEY() macros allow constructing C0/C1 sequences
- * directly in the code-base without requiring any intermediate buffer during
- * runtime.
- */
-
-#define C0_CSI "\e["
-#define C1_CSI "\x9b"
-
-#define SEQ(_screen, _prefix_esc, _c0, _c1, _seq) \
- (((_screen)->flags & TERM_FLAG_7BIT_MODE) ? \
- ((_prefix_esc) ? ("\e" _c0 _seq) : (_c0 _seq)) : \
- ((_prefix_esc) ? ("\e" _c1 _seq) : (_c1 _seq)))
-
-#define SEQ_SIZE(_screen, _prefix_esc, _c0, _c1, _seq) \
- (((_screen)->flags & TERM_FLAG_7BIT_MODE) ? \
- ((_prefix_esc) ? sizeof("\e" _c0 _seq) : sizeof(_c0 _seq)) : \
- ((_prefix_esc) ? sizeof("\e" _c1 _seq) : sizeof(_c1 _seq)))
-
-#define SEQ_WRITE_KEY(_screen, _prefix_esc, _c0, _c1, _seq) \
- screen_write((_screen), \
- SEQ((_screen), (_prefix_esc), \
- _c0, _c1, _seq), \
- SEQ_SIZE((_screen), (_prefix_esc), \
- _c0, _c1, _seq) - 1)
-
-#define SEQ_WRITE(_screen, _c0, _c1, _seq) \
- SEQ_WRITE_KEY((_screen), false, _c0, _c1, _seq)
-
-static int screen_write(term_screen *screen, const void *buf, size_t len) {
- if (len < 1 || !screen->write_fn)
- return 0;
-
- return screen->write_fn(screen, screen->write_fn_data, buf, len);
-}
-
-/*
- * Command Forwarding
- * Some commands cannot be handled by the screen-layer directly. Those are
- * forwarded to the command-handler of the caller. This is rarely used and can
- * safely be set to NULL.
- */
-
-static int screen_forward(term_screen *screen, unsigned int cmd, const term_seq *seq) {
- if (!screen->cmd_fn)
- return 0;
-
- return screen->cmd_fn(screen, screen->cmd_fn_data, cmd, seq);
-}
-
-/*
- * Screen Helpers
- * These helpers implement common-operations like cursor-handler and more, which
- * are used by several command dispatchers.
- */
-
-static unsigned int screen_clamp_x(term_screen *screen, unsigned int x) {
- if (x >= screen->page->width)
- return (screen->page->width > 0) ? screen->page->width - 1 : 0;
-
- return x;
-}
-
-static unsigned int screen_clamp_y(term_screen *screen, unsigned int y) {
- if (y >= screen->page->height)
- return (screen->page->height > 0) ? screen->page->height - 1 : 0;
-
- return y;
-}
-
-static bool screen_tab_is_set(term_screen *screen, unsigned int pos) {
- if (pos >= screen->page->width)
- return false;
-
- return screen->tabs[pos / 8] & (1 << (pos % 8));
-}
-
-static inline void screen_age_cursor(term_screen *screen) {
- term_cell *cell;
-
- cell = term_page_get_cell(screen->page, screen->state.cursor_x, screen->state.cursor_y);
- if (cell)
- cell->age = screen->age;
-}
-
-static void screen_cursor_clear_wrap(term_screen *screen) {
- screen->flags &= ~TERM_FLAG_PENDING_WRAP;
-}
-
-static void screen_cursor_set(term_screen *screen, unsigned int x, unsigned int y) {
- x = screen_clamp_x(screen, x);
- y = screen_clamp_y(screen, y);
-
- if (x == screen->state.cursor_x && y == screen->state.cursor_y)
- return;
-
- if (!(screen->flags & TERM_FLAG_HIDE_CURSOR))
- screen_age_cursor(screen);
-
- screen->state.cursor_x = x;
- screen->state.cursor_y = y;
-
- if (!(screen->flags & TERM_FLAG_HIDE_CURSOR))
- screen_age_cursor(screen);
-}
-
-static void screen_cursor_set_rel(term_screen *screen, unsigned int x, unsigned int y) {
- if (screen->state.origin_mode) {
- x = screen_clamp_x(screen, x);
- y = screen_clamp_x(screen, y) + screen->page->scroll_idx;
-
- if (y >= screen->page->scroll_idx + screen->page->scroll_num) {
- y = screen->page->scroll_idx + screen->page->scroll_num;
- if (screen->page->scroll_num > 0)
- y -= 1;
- }
- }
-
- screen_cursor_set(screen, x, y);
-}
-
-static void screen_cursor_left(term_screen *screen, unsigned int num) {
- if (num > screen->state.cursor_x)
- num = screen->state.cursor_x;
-
- screen_cursor_set(screen, screen->state.cursor_x - num, screen->state.cursor_y);
-}
-
-static void screen_cursor_left_tab(term_screen *screen, unsigned int num) {
- unsigned int i;
-
- i = screen->state.cursor_x;
- while (i > 0 && num > 0) {
- if (screen_tab_is_set(screen, --i))
- --num;
- }
-
- screen_cursor_set(screen, i, screen->state.cursor_y);
-}
-
-static void screen_cursor_right(term_screen *screen, unsigned int num) {
- if (num > screen->page->width)
- num = screen->page->width;
-
- screen_cursor_set(screen, screen->state.cursor_x + num, screen->state.cursor_y);
-}
-
-static void screen_cursor_right_tab(term_screen *screen, unsigned int num) {
- unsigned int i;
-
- i = screen->state.cursor_x;
- while (i + 1 < screen->page->width && num > 0) {
- if (screen_tab_is_set(screen, ++i))
- --num;
- }
-
- screen_cursor_set(screen, i, screen->state.cursor_y);
-}
-
-static void screen_cursor_up(term_screen *screen, unsigned int num, bool scroll) {
- unsigned int max;
-
- if (screen->state.cursor_y < screen->page->scroll_idx) {
- if (num > screen->state.cursor_y)
- num = screen->state.cursor_y;
-
- screen_cursor_set(screen, screen->state.cursor_x, screen->state.cursor_y - num);
- } else {
- max = screen->state.cursor_y - screen->page->scroll_idx;
- if (num > max) {
- if (num < 1)
- return;
-
- if (!(screen->flags & TERM_FLAG_HIDE_CURSOR))
- screen_age_cursor(screen);
-
- if (scroll)
- term_page_scroll_down(screen->page, num - max, &screen->state.attr, screen->age, NULL);
-
- screen->state.cursor_y = screen->page->scroll_idx;
-
- if (!(screen->flags & TERM_FLAG_HIDE_CURSOR))
- screen_age_cursor(screen);
- } else {
- screen_cursor_set(screen, screen->state.cursor_x, screen->state.cursor_y - num);
- }
- }
-}
-
-static void screen_cursor_down(term_screen *screen, unsigned int num, bool scroll) {
- unsigned int max;
-
- if (screen->state.cursor_y >= screen->page->scroll_idx + screen->page->scroll_num) {
- if (num > screen->page->height)
- num = screen->page->height;
-
- screen_cursor_set(screen, screen->state.cursor_x, screen->state.cursor_y - num);
- } else {
- max = screen->page->scroll_idx + screen->page->scroll_num - 1 - screen->state.cursor_y;
- if (num > max) {
- if (num < 1)
- return;
-
- if (!(screen->flags & TERM_FLAG_HIDE_CURSOR))
- screen_age_cursor(screen);
-
- if (scroll)
- term_page_scroll_up(screen->page, num - max, &screen->state.attr, screen->age, screen->history);
-
- screen->state.cursor_y = screen->page->scroll_idx + screen->page->scroll_num - 1;
-
- if (!(screen->flags & TERM_FLAG_HIDE_CURSOR))
- screen_age_cursor(screen);
- } else {
- screen_cursor_set(screen, screen->state.cursor_x, screen->state.cursor_y + num);
- }
- }
-}
-
-static void screen_save_state(term_screen *screen, term_state *where) {
- *where = screen->state;
-}
-
-static void screen_restore_state(term_screen *screen, term_state *from) {
- screen_cursor_set(screen, from->cursor_x, from->cursor_y);
- screen->state = *from;
-}
-
-static void screen_reset_page(term_screen *screen, term_page *page) {
- term_page_set_scroll_region(page, 0, page->height);
- term_page_erase(page, 0, 0, page->width, page->height, &screen->state.attr, screen->age, false);
-}
-
-static void screen_change_alt(term_screen *screen, bool set) {
- if (set) {
- screen->page = screen->page_alt;
- screen->history = NULL;
- } else {
- screen->page = screen->page_main;
- screen->history = screen->history_main;
- }
-
- screen->page->age = screen->age;
-}
-
-static inline void set_reset(term_screen *screen, unsigned int flag, bool set) {
- if (set)
- screen->flags |= flag;
- else
- screen->flags &= ~flag;
-}
-
-static void screen_mode_change_ansi(term_screen *screen, unsigned mode, bool set) {
- switch (mode) {
- case 20:
- /*
- * LNM: line-feed/new-line mode
- * TODO
- */
- set_reset(screen, TERM_FLAG_NEWLINE_MODE, set);
-
- break;
- default:
- log_debug("terminal: failed to %s unknown ANSI mode %u", set ? "set" : "unset", mode);
- }
-}
-
-static void screen_mode_change_dec(term_screen *screen, unsigned int mode, bool set) {
- switch (mode) {
- case 1:
- /*
- * DECCKM: cursor-keys
- * TODO
- */
- set_reset(screen, TERM_FLAG_CURSOR_KEYS, set);
-
- break;
- case 6:
- /*
- * DECOM: origin-mode
- * TODO
- */
- screen->state.origin_mode = set;
-
- break;
- case 7:
- /*
- * DECAWN: auto-wrap mode
- * TODO
- */
- screen->state.auto_wrap = set;
-
- break;
- case 25:
- /*
- * DECTCEM: text-cursor-enable
- * TODO
- */
- set_reset(screen, TERM_FLAG_HIDE_CURSOR, !set);
- screen_age_cursor(screen);
-
- break;
- case 47:
- /*
- * XTERM-ASB: alternate-screen-buffer
- * This enables/disables the alternate screen-buffer.
- * It effectively saves the current page content and
- * allows you to restore it when changing to the
- * original screen-buffer again.
- */
- screen_change_alt(screen, set);
-
- break;
- case 1047:
- /*
- * XTERM-ASBPE: alternate-screen-buffer-post-erase
- * This is the same as XTERM-ASB but erases the
- * alternate screen-buffer before switching back to the
- * original buffer. Use it to discard any data on the
- * alternate screen buffer when done.
- */
- if (!set)
- screen_reset_page(screen, screen->page_alt);
-
- screen_change_alt(screen, set);
-
- break;
- case 1048:
- /*
- * XTERM-ASBCS: alternate-screen-buffer-cursor-state
- * This has the same effect as DECSC/DECRC, but uses a
- * separate state buffer. It is usually used in
- * combination with alternate screen buffers to provide
- * stacked state storage.
- */
- if (set)
- screen_save_state(screen, &screen->saved_alt);
- else
- screen_restore_state(screen, &screen->saved_alt);
-
- break;
- case 1049:
- /*
- * XTERM-ASBX: alternate-screen-buffer-extended
- * This combines XTERM-ASBPE and XTERM-ASBCS somewhat.
- * When enabling, state is saved, alternate screen
- * buffer is activated and cleared.
- * When disabled, alternate screen buffer is cleared,
- * then normal screen buffer is enabled and state is
- * restored.
- */
- if (set)
- screen_save_state(screen, &screen->saved_alt);
-
- screen_reset_page(screen, screen->page_alt);
- screen_change_alt(screen, set);
-
- if (!set)
- screen_restore_state(screen, &screen->saved_alt);
-
- break;
- default:
- log_debug("terminal: failed to %s unknown DEC mode %u", set ? "set" : "unset", mode);
- }
-}
-
-/* map a character according to current GL and GR maps */
-static uint32_t screen_map(term_screen *screen, uint32_t val) {
- uint32_t nval = -1U;
-
- /* 32 and 127 always map to identity. 160 and 255 map to identity iff a
- * 96 character set is loaded into GR. Values above 255 always map to
- * identity. */
- switch (val) {
- case 33 ... 126:
- if (screen->state.glt) {
- nval = (**screen->state.glt)[val - 32];
- screen->state.glt = NULL;
- } else {
- nval = (**screen->state.gl)[val - 32];
- }
- break;
- case 160 ... 255:
- if (screen->state.grt) {
- nval = (**screen->state.grt)[val - 160];
- screen->state.grt = NULL;
- } else {
- nval = (**screen->state.gr)[val - 160];
- }
- break;
- }
-
- return (nval == -1U) ? val : nval;
-}
-
-/*
- * Command Handlers
- * This is the unofficial documentation of all the TERM_CMD_* definitions. Each
- * handled command has a separate function with an extensive comment on the
- * semantics of the command.
- * Note that many semantics are unknown and need to be verified. This is mostly
- * about error-handling, though. Applications rarely rely on those features.
- */
-
-static int screen_DA1(term_screen *screen, const term_seq *seq);
-static int screen_LF(term_screen *screen, const term_seq *seq);
-
-static int screen_GRAPHIC(term_screen *screen, const term_seq *seq) {
- term_char_t ch = TERM_CHAR_NULL;
-
- if (screen->state.cursor_x + 1 == screen->page->width
- && screen->flags & TERM_FLAG_PENDING_WRAP
- && screen->state.auto_wrap) {
- screen_cursor_down(screen, 1, true);
- screen_cursor_set(screen, 0, screen->state.cursor_y);
- }
-
- screen_cursor_clear_wrap(screen);
-
- ch = term_char_merge(ch, screen_map(screen, seq->terminator));
- term_page_write(screen->page, screen->state.cursor_x, screen->state.cursor_y, ch, 1, &screen->state.attr, screen->age, false);
-
- if (screen->state.cursor_x + 1 == screen->page->width)
- screen->flags |= TERM_FLAG_PENDING_WRAP;
- else
- screen_cursor_right(screen, 1);
-
- return 0;
-}
-
-static int screen_BEL(term_screen *screen, const term_seq *seq) {
- /*
- * BEL - sound bell tone
- * This command should trigger an acoustic bell. Usually, this is
- * forwarded directly to the pcspkr. However, bells have become quite
- * uncommon and annoying, so we're not implementing them here. Instead,
- * it's one of the commands we forward to the caller.
- */
-
- return screen_forward(screen, TERM_CMD_BEL, seq);
-}
-
-static int screen_BS(term_screen *screen, const term_seq *seq) {
- /*
- * BS - backspace
- * Move cursor one cell to the left. If already at the left margin,
- * nothing happens.
- */
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_left(screen, 1);
- return 0;
-}
-
-static int screen_CBT(term_screen *screen, const term_seq *seq) {
- /*
- * CBT - cursor-backward-tabulation
- * Move the cursor @args[0] tabs backwards (to the left). The
- * current cursor cell, in case it's a tab, is not counted.
- * Furthermore, the cursor cannot be moved beyond position 0 and
- * it will stop there.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_left_tab(screen, num);
-
- return 0;
-}
-
-static int screen_CHA(term_screen *screen, const term_seq *seq) {
- /*
- * CHA - cursor-horizontal-absolute
- * Move the cursor to position @args[0] in the current line. The
- * cursor cannot be moved beyond the rightmost cell and will stop
- * there.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int pos = 1;
-
- if (seq->args[0] > 0)
- pos = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_set(screen, pos - 1, screen->state.cursor_y);
-
- return 0;
-}
-
-static int screen_CHT(term_screen *screen, const term_seq *seq) {
- /*
- * CHT - cursor-horizontal-forward-tabulation
- * Move the cursor @args[0] tabs forward (to the right). The
- * current cursor cell, in case it's a tab, is not counted.
- * Furthermore, the cursor cannot be moved beyond the rightmost cell
- * and will stop there.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_right_tab(screen, num);
-
- return 0;
-}
-
-static int screen_CNL(term_screen *screen, const term_seq *seq) {
- /*
- * CNL - cursor-next-line
- * Move the cursor @args[0] lines down.
- *
- * TODO: Does this stop at the bottom or cause a scroll-up?
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_down(screen, num, false);
-
- return 0;
-}
-
-static int screen_CPL(term_screen *screen, const term_seq *seq) {
- /*
- * CPL - cursor-preceding-line
- * Move the cursor @args[0] lines up.
- *
- * TODO: Does this stop at the top or cause a scroll-up?
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_up(screen, num, false);
-
- return 0;
-}
-
-static int screen_CR(term_screen *screen, const term_seq *seq) {
- /*
- * CR - carriage-return
- * Move the cursor to the left margin on the current line.
- */
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_set(screen, 0, screen->state.cursor_y);
-
- return 0;
-}
-
-static int screen_CUB(term_screen *screen, const term_seq *seq) {
- /*
- * CUB - cursor-backward
- * Move the cursor @args[0] positions to the left. The cursor stops
- * at the left-most position.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_left(screen, num);
-
- return 0;
-}
-
-static int screen_CUD(term_screen *screen, const term_seq *seq) {
- /*
- * CUD - cursor-down
- * Move the cursor @args[0] positions down. The cursor stops at the
- * bottom margin. If it was already moved further, it stops at the
- * bottom line.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_down(screen, num, false);
-
- return 0;
-}
-
-static int screen_CUF(term_screen *screen, const term_seq *seq) {
- /*
- * CUF -cursor-forward
- * Move the cursor @args[0] positions to the right. The cursor stops
- * at the right-most position.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_right(screen, num);
-
- return 0;
-}
-
-static int screen_CUP(term_screen *screen, const term_seq *seq) {
- /*
- * CUP - cursor-position
- * Moves the cursor to position @args[1] x @args[0]. If either is 0, it
- * is treated as 1. The positions are subject to the origin-mode and
- * clamped to the addressable with/height.
- *
- * Defaults:
- * args[0]: 1
- * args[1]: 1
- */
-
- unsigned int x = 1, y = 1;
-
- if (seq->args[0] > 0)
- y = seq->args[0];
- if (seq->args[1] > 0)
- x = seq->args[1];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_set_rel(screen, x - 1, y - 1);
-
- return 0;
-}
-
-static int screen_CUU(term_screen *screen, const term_seq *seq) {
- /*
- * CUU - cursor-up
- * Move the cursor @args[0] positions up. The cursor stops at the
- * top margin. If it was already moved further, it stops at the
- * top line.
- *
- * Defaults:
- * args[0]: 1
- *
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_up(screen, num, false);
-
- return 0;
-}
-
-static int screen_DA1(term_screen *screen, const term_seq *seq) {
- /*
- * DA1 - primary-device-attributes
- * The primary DA asks for basic terminal features. We simply return
- * a hard-coded list of features we implement.
- * Note that the primary DA asks for supported features, not currently
- * enabled features.
- *
- * The terminal's answer is:
- * ^[ ? 64 ; ARGS c
- * The first argument, 64, is fixed and denotes a VT420, the last
- * DEC-term that extended this number.
- * All following arguments denote supported features. Note
- * that at most 15 features can be sent (max CSI args). It is safe to
- * send more, but clients might not be able to parse them. This is a
- * client's problem and we shouldn't care. There is no other way to
- * send those feature lists, so we have to extend them beyond 15 in
- * those cases.
- *
- * Known modes:
- * 1: 132 column mode
- * The 132 column mode is supported by the terminal.
- * 2: printer port
- * A priner-port is supported and can be addressed via
- * control-codes.
- * 3: ReGIS graphics
- * Support for ReGIS graphics is available. The ReGIS routines
- * provide the "remote graphics instruction set" and allow basic
- * vector-rendering.
- * 4: sixel
- * Support of Sixel graphics is available. This provides access
- * to the sixel bitmap routines.
- * 6: selective erase
- * The terminal supports DECSCA and related selective-erase
- * functions. This allows to protect specific cells from being
- * erased, if specified.
- * 7: soft character set (DRCS)
- * TODO: ?
- * 8: user-defined keys (UDKs)
- * TODO: ?
- * 9: national-replacement character sets (NRCS)
- * National-replacement character-sets are available.
- * 12: Yugoslavian (SCS)
- * TODO: ?
- * 15: technical character set
- * The DEC technical-character-set is available.
- * 18: windowing capability
- * TODO: ?
- * 21: horizontal scrolling
- * TODO: ?
- * 22: ANSII color
- * TODO: ?
- * 23: Greek
- * TODO: ?
- * 24: Turkish
- * TODO: ?
- * 29: ANSI text locator
- * TODO: ?
- * 42: ISO Latin-2 character set
- * TODO: ?
- * 44: PCTerm
- * TODO: ?
- * 45: soft keymap
- * TODO: ?
- * 46: ASCII emulation
- * TODO: ?
- */
-
- return SEQ_WRITE(screen, C0_CSI, C1_CSI, "?64;1;6;9;15c");
-}
-
-static int screen_DA2(term_screen *screen, const term_seq *seq) {
- /*
- * DA2 - secondary-device-attributes
- * The secondary DA asks for the terminal-ID, firmware versions and
- * other non-primary attributes. All these values are
- * informational-only and should not be used by the host to detect
- * terminal features.
- *
- * The terminal's response is:
- * ^[ > 61 ; FIRMWARE ; KEYBOARD c
- * whereas 65 is fixed for VT525 terminals, the last terminal-line that
- * increased this number. FIRMWARE is the firmware
- * version encoded as major/minor (20 == 2.0) and KEYBOARD is 0 for STD
- * keyboard and 1 for PC keyboards.
- *
- * We replace the firmware-version with the systemd-version so clients
- * can decode it again.
- */
-
- return SEQ_WRITE(screen, C0_CSI, C1_CSI, ">65;" PACKAGE_VERSION ";1c");
-}
-
-static int screen_DA3(term_screen *screen, const term_seq *seq) {
- /*
- * DA3 - tertiary-device-attributes
- * The tertiary DA is used to query the terminal-ID.
- *
- * The terminal's response is:
- * ^P ! | XX AA BB CC ^\
- * whereas all four parameters are hexadecimal-encoded pairs. XX
- * denotes the manufacturing site, AA BB CC is the terminal's ID.
- */
-
- /* we do not support tertiary DAs */
- return 0;
-}
-
-static int screen_DC1(term_screen *screen, const term_seq *seq) {
- /*
- * DC1 - device-control-1 or XON
- * This clears any previous XOFF and resumes terminal-transmission.
- */
-
- /* we do not support XON */
- return 0;
-}
-
-static int screen_DC3(term_screen *screen, const term_seq *seq) {
- /*
- * DC3 - device-control-3 or XOFF
- * Stops terminal transmission. No further characters are sent until
- * an XON is received.
- */
-
- /* we do not support XOFF */
- return 0;
-}
-
-static int screen_DCH(term_screen *screen, const term_seq *seq) {
- /*
- * DCH - delete-character
- * This deletes @argv[0] characters at the current cursor position. As
- * characters are deleted, the remaining characters between the cursor
- * and right margin move to the left. Character attributes move with the
- * characters. The terminal adds blank spaces with no visual character
- * attributes at the right margin. DCH has no effect outside the
- * scrolling margins.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- term_page_delete_cells(screen->page, screen->state.cursor_x, screen->state.cursor_y, num, &screen->state.attr, screen->age);
-
- return 0;
-}
-
-static int screen_DECALN(term_screen *screen, const term_seq *seq) {
- /*
- * DECALN - screen-alignment-pattern
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECANM(term_screen *screen, const term_seq *seq) {
- /*
- * DECANM - ansi-mode
- * Set the terminal into VT52 compatibility mode. Control sequences
- * overlap with regular sequences so we have to detect them early before
- * dispatching them.
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECBI(term_screen *screen, const term_seq *seq) {
- /*
- * DECBI - back-index
- * This control function moves the cursor backward one column. If the
- * cursor is at the left margin, then all screen data within the margin
- * moves one column to the right. The column that shifted past the right
- * margin is lost.
- * DECBI adds a new column at the left margin with no visual attributes.
- * DECBI does not affect the margins. If the cursor is beyond the
- * left-margin at the left border, then the terminal ignores DECBI.
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECCARA(term_screen *screen, const term_seq *seq) {
- /*
- * DECCARA - change-attributes-in-rectangular-area
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECCRA(term_screen *screen, const term_seq *seq) {
- /*
- * DECCRA - copy-rectangular-area
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECDC(term_screen *screen, const term_seq *seq) {
- /*
- * DECDC - delete-column
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECDHL_BH(term_screen *screen, const term_seq *seq) {
- /*
- * DECDHL_BH - double-width-double-height-line: bottom half
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECDHL_TH(term_screen *screen, const term_seq *seq) {
- /*
- * DECDHL_TH - double-width-double-height-line: top half
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECDWL(term_screen *screen, const term_seq *seq) {
- /*
- * DECDWL - double-width-single-height-line
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECEFR(term_screen *screen, const term_seq *seq) {
- /*
- * DECEFR - enable-filter-rectangle
- * Defines the coordinates of a filter rectangle (top, left, bottom,
- * right as @args[0] to @args[3]) and activates it.
- * Anytime the locator is detected outside of the filter rectangle, an
- * outside rectangle event is generated and the rectangle is disabled.
- * Filter rectangles are always treated as "one-shot" events. Any
- * parameters that are omitted default to the current locator position.
- * If all parameters are omitted, any locator motion will be reported.
- * DECELR always cancels any prevous rectangle definition.
- *
- * The locator is usually associated with the mouse-cursor, but based
- * on cells instead of pixels. See DECELR how to initialize and enable
- * it. DECELR can also enable pixel-mode instead of cell-mode.
- *
- * TODO: implement
- */
-
- return 0;
-}
-
-static int screen_DECELF(term_screen *screen, const term_seq *seq) {
- /*
- * DECELF - enable-local-functions
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECELR(term_screen *screen, const term_seq *seq) {
- /*
- * DECELR - enable-locator-reporting
- * This changes the locator-reporting mode. @args[0] specifies the mode
- * to set, 0 disables locator-reporting, 1 enables it continuously, 2
- * enables it for a single report. @args[1] specifies the
- * precision-mode. 0 and 2 set the reporting to cell-precision, 1 sets
- * pixel-precision.
- *
- * Defaults:
- * args[0]: 0
- * args[1]: 0
- *
- * TODO: implement
- */
-
- return 0;
-}
-
-static int screen_DECERA(term_screen *screen, const term_seq *seq) {
- /*
- * DECERA - erase-rectangular-area
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECFI(term_screen *screen, const term_seq *seq) {
- /*
- * DECFI - forward-index
- * This control function moves the cursor forward one column. If the
- * cursor is at the right margin, then all screen data within the
- * margins moves one column to the left. The column shifted past the
- * left margin is lost.
- * DECFI adds a new column at the right margin, with no visual
- * attributes. DECFI does not affect margins. If the cursor is beyond
- * the right margin at the border of the page when the terminal
- * receives DECFI, then the terminal ignores DECFI.
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECFRA(term_screen *screen, const term_seq *seq) {
- /*
- * DECFRA - fill-rectangular-area
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECIC(term_screen *screen, const term_seq *seq) {
- /*
- * DECIC - insert-column
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECID(term_screen *screen, const term_seq *seq) {
- /*
- * DECID - return-terminal-id
- * This is an obsolete form of TERM_CMD_DA1.
- */
-
- return screen_DA1(screen, seq);
-}
-
-static int screen_DECINVM(term_screen *screen, const term_seq *seq) {
- /*
- * DECINVM - invoke-macro
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECKBD(term_screen *screen, const term_seq *seq) {
- /*
- * DECKBD - keyboard-language-selection
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECKPAM(term_screen *screen, const term_seq *seq) {
- /*
- * DECKPAM - keypad-application-mode
- * Enables the keypad-application mode. If enabled, the keypad sends
- * special characters instead of the printed characters. This way,
- * applications can detect whether a numeric key was pressed on the
- * top-row or on the keypad.
- * Default is keypad-numeric-mode.
- */
-
- screen->flags |= TERM_FLAG_KEYPAD_MODE;
-
- return 0;
-}
-
-static int screen_DECKPNM(term_screen *screen, const term_seq *seq) {
- /*
- * DECKPNM - keypad-numeric-mode
- * This disables the keypad-application-mode (DECKPAM) and returns to
- * the keypad-numeric-mode. Keypresses on the keypad generate the same
- * sequences as corresponding keypresses on the main keyboard.
- * Default is keypad-numeric-mode.
- */
-
- screen->flags &= ~TERM_FLAG_KEYPAD_MODE;
-
- return 0;
-}
-
-static int screen_DECLFKC(term_screen *screen, const term_seq *seq) {
- /*
- * DECLFKC - local-function-key-control
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECLL(term_screen *screen, const term_seq *seq) {
- /*
- * DECLL - load-leds
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECLTOD(term_screen *screen, const term_seq *seq) {
- /*
- * DECLTOD - load-time-of-day
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECPCTERM(term_screen *screen, const term_seq *seq) {
- /*
- * DECPCTERM - pcterm-mode
- * This enters/exits the PCTerm mode. Default mode is VT-mode. It can
- * also select parameters for scancode/keycode mappings in SCO mode.
- *
- * Definitely not worth implementing. Lets kill PCTerm/SCO modes!
- */
-
- return 0;
-}
-
-static int screen_DECPKA(term_screen *screen, const term_seq *seq) {
- /*
- * DECPKA - program-key-action
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECPKFMR(term_screen *screen, const term_seq *seq) {
- /*
- * DECPKFMR - program-key-free-memory-report
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECRARA(term_screen *screen, const term_seq *seq) {
- /*
- * DECRARA - reverse-attributes-in-rectangular-area
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECRC(term_screen *screen, const term_seq *seq) {
- /*
- * DECRC - restore-cursor
- * Restores the terminal to the state saved by the save cursor (DECSC)
- * function. This includes more than just the cursor-position.
- *
- * If nothing was saved by DECSC, then DECRC performs the following
- * actions:
- * * Moves the cursor to the home position (upper left of screen).
- * * Resets origin mode (DECOM).
- * * Turns all character attributes off (normal setting).
- * * Maps the ASCII character set into GL, and the DEC Supplemental
- * Graphic set into GR.
- *
- * The terminal maintains a separate DECSC buffer for the main display
- * and the status line. This feature lets you save a separate operating
- * state for the main display and the status line.
- */
-
- screen_restore_state(screen, &screen->saved);
-
- return 0;
-}
-
-static int screen_DECREQTPARM(term_screen *screen, const term_seq *seq) {
- /*
- * DECREQTPARM - request-terminal-parameters
- * The sequence DECREPTPARM is sent by the terminal controller to notify
- * the host of the status of selected terminal parameters. The status
- * sequence may be sent when requested by the host or at the terminal's
- * discretion. DECREPTPARM is sent upon receipt of a DECREQTPARM.
- *
- * If @args[0] is 0, this marks a request and the terminal is allowed
- * to send DECREPTPARM messages without request. If it is 1, the same
- * applies but the terminal should no longer send DECREPTPARM
- * unrequested.
- * 2 and 3 mark a report, but 3 is only used if the terminal answers as
- * an explicit request with @args[0] == 1.
- *
- * The other arguments are ignored in requests, but have the following
- * meaning in responses:
- * args[1]: 1=no-parity-set 4=parity-set-and-odd 5=parity-set-and-even
- * args[2]: 1=8bits-per-char 2=7bits-per-char
- * args[3]: transmission-speed
- * args[4]: receive-speed
- * args[5]: 1=bit-rate-multiplier-is-16
- * args[6]: This value communicates the four switch values in block 5
- * of SETUP B, which are only visible to the user when an STP
- * option is installed. These bits may be assigned for an STP
- * device. The four bits are a decimal-encoded binary number.
- * Value between 0-15.
- *
- * The transmission/receive speeds have mappings for number => bits/s
- * which are quite weird. Examples are: 96->3600, 112->9600, 120->19200
- *
- * Defaults:
- * args[0]: 0
- */
-
- if (seq->n_args < 1 || seq->args[0] == 0) {
- screen->flags &= ~TERM_FLAG_INHIBIT_TPARM;
- return SEQ_WRITE(screen, C0_CSI, C1_CSI, "2;1;1;120;120;1;0x");
- } else if (seq->args[0] == 1) {
- screen->flags |= TERM_FLAG_INHIBIT_TPARM;
- return SEQ_WRITE(screen, C0_CSI, C1_CSI, "3;1;1;120;120;1;0x");
- } else {
- return 0;
- }
-}
-
-static int screen_DECRPKT(term_screen *screen, const term_seq *seq) {
- /*
- * DECRPKT - report-key-type
- * Response to DECRQKT, we can safely ignore it as we're the one sending
- * it to the host.
- */
-
- return 0;
-}
-
-static int screen_DECRQCRA(term_screen *screen, const term_seq *seq) {
- /*
- * DECRQCRA - request-checksum-of-rectangular-area
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECRQDE(term_screen *screen, const term_seq *seq) {
- /*
- * DECRQDE - request-display-extent
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECRQKT(term_screen *screen, const term_seq *seq) {
- /*
- * DECRQKT - request-key-type
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECRQLP(term_screen *screen, const term_seq *seq) {
- /*
- * DECRQLP - request-locator-position
- * See DECELR for locator-information.
- *
- * TODO: document and implement
- */
-
- return 0;
-}
-
-static int screen_DECRQM_ANSI(term_screen *screen, const term_seq *seq) {
- /*
- * DECRQM_ANSI - request-mode-ansi
- * The host sends this control function to find out if a particular mode
- * is set or reset. The terminal responds with a report mode function.
- * @args[0] contains the mode to query.
- *
- * Response is DECRPM with the first argument set to the mode that was
- * queried, second argument is 0 if mode is invalid, 1 if mode is set,
- * 2 if mode is not set (reset), 3 if mode is permanently set and 4 if
- * mode is permanently not set (reset):
- * ANSI: ^[ MODE ; VALUE $ y
- * DEC: ^[ ? MODE ; VALUE $ y
- *
- * TODO: implement
- */
-
- return 0;
-}
-
-static int screen_DECRQM_DEC(term_screen *screen, const term_seq *seq) {
- /*
- * DECRQM_DEC - request-mode-dec
- * Same as DECRQM_ANSI but for DEC modes.
- *
- * TODO: implement
- */
-
- return 0;
-}
-
-static int screen_DECRQPKFM(term_screen *screen, const term_seq *seq) {
- /*
- * DECRQPKFM - request-program-key-free-memory
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECRQPSR(term_screen *screen, const term_seq *seq) {
- /*
- * DECRQPSR - request-presentation-state-report
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECRQTSR(term_screen *screen, const term_seq *seq) {
- /*
- * DECRQTSR - request-terminal-state-report
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECRQUPSS(term_screen *screen, const term_seq *seq) {
- /*
- * DECRQUPSS - request-user-preferred-supplemental-set
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSACE(term_screen *screen, const term_seq *seq) {
- /*
- * DECSACE - select-attribute-change-extent
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSASD(term_screen *screen, const term_seq *seq) {
- /*
- * DECSASD - select-active-status-display
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSC(term_screen *screen, const term_seq *seq) {
- /*
- * DECSC - save-cursor
- * Save cursor and terminal state so it can be restored later on.
- * Saves the following items in the terminal's memory:
- * * Cursor position
- * * Character attributes set by the SGR command
- * * Character sets (G0, G1, G2, or G3) currently in GL and GR
- * * Wrap flag (autowrap or no autowrap)
- * * State of origin mode (DECOM)
- * * Selective erase attribute
- * * Any single shift 2 (SS2) or single shift 3 (SS3) functions sent
- */
-
- screen_save_state(screen, &screen->saved);
-
- return 0;
-}
-
-static int screen_DECSCA(term_screen *screen, const term_seq *seq) {
- /*
- * DECSCA - select-character-protection-attribute
- * Defines the characters that come after it as erasable or not erasable
- * from the screen. The selective erase control functions (DECSED and
- * DECSEL) can only erase characters defined as erasable.
- *
- * @args[0] specifies the new mode. 0 and 2 mark any following character
- * as erasable, 1 marks it as not erasable.
- *
- * Defaults:
- * args[0]: 0
- */
-
- unsigned int mode = 0;
-
- if (seq->args[0] > 0)
- mode = seq->args[0];
-
- switch (mode) {
- case 0:
- case 2:
- screen->state.attr.protect = 0;
- break;
- case 1:
- screen->state.attr.protect = 1;
- break;
- }
-
- return 0;
-}
-
-static int screen_DECSCL(term_screen *screen, const term_seq *seq) {
- /*
- * DECSCL - select-conformance-level
- * Select the terminal's operating level. The factory default is
- * level 4 (VT Level 4 mode, 7-bit controls).
- * When you change the conformance level, the terminal performs a hard
- * reset (RIS).
- *
- * @args[0] defines the conformance-level, valid values are:
- * 61: Level 1 (VT100)
- * 62: Level 2 (VT200)
- * 63: Level 3 (VT300)
- * 64: Level 4 (VT400)
- * @args[1] defines the 8bit-mode, valid values are:
- * 0: 8-bit controls
- * 1: 7-bit controls
- * 2: 8-bit controls (same as 0)
- *
- * If @args[0] is 61, then @args[1] is ignored and 7bit controls are
- * enforced.
- *
- * Defaults:
- * args[0]: 64
- * args[1]: 0
- */
-
- unsigned int level = 64, bit = 0;
-
- if (seq->n_args > 0) {
- level = seq->args[0];
- if (seq->n_args > 1)
- bit = seq->args[1];
- }
-
- term_screen_hard_reset(screen);
-
- switch (level) {
- case 61:
- screen->conformance_level = TERM_CONFORMANCE_LEVEL_VT100;
- screen->flags |= TERM_FLAG_7BIT_MODE;
- break;
- case 62 ... 69:
- screen->conformance_level = TERM_CONFORMANCE_LEVEL_VT400;
- if (bit == 1)
- screen->flags |= TERM_FLAG_7BIT_MODE;
- else
- screen->flags &= ~TERM_FLAG_7BIT_MODE;
- break;
- }
-
- return 0;
-}
-
-static int screen_DECSCP(term_screen *screen, const term_seq *seq) {
- /*
- * DECSCP - select-communication-port
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSCPP(term_screen *screen, const term_seq *seq) {
- /*
- * DECSCPP - select-columns-per-page
- * Select columns per page. The number of rows is unaffected by this.
- * @args[0] selectes the number of columns (width), DEC only defines 80
- * and 132, but we allow any integer here. 0 is equivalent to 80.
- * Page content is *not* cleared and the cursor is left untouched.
- * However, if the page is reduced in width and the cursor would be
- * outside the visible region, it's set to the right border. Newly added
- * cells are cleared. No data is retained outside the visible region.
- *
- * Defaults:
- * args[0]: 0
- *
- * TODO: implement
- */
-
- return 0;
-}
-
-static int screen_DECSCS(term_screen *screen, const term_seq *seq) {
- /*
- * DECSCS - select-communication-speed
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSCUSR(term_screen *screen, const term_seq *seq) {
- /*
- * DECSCUSR - set-cursor-style
- * This changes the style of the cursor. @args[0] can be one of:
- * 0, 1: blinking block
- * 2: steady block
- * 3: blinking underline
- * 4: steady underline
- * Changing this setting does _not_ affect the cursor visibility itself.
- * Use DECTCEM for that.
- *
- * Defaults:
- * args[0]: 0
- *
- * TODO: implement
- */
-
- return 0;
-}
-
-static int screen_DECSDDT(term_screen *screen, const term_seq *seq) {
- /*
- * DECSDDT - select-disconnect-delay-time
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSDPT(term_screen *screen, const term_seq *seq) {
- /*
- * DECSDPT - select-digital-printed-data-type
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSED(term_screen *screen, const term_seq *seq) {
- /*
- * DECSED - selective-erase-in-display
- * This control function erases some or all of the erasable characters
- * in the display. DECSED can only erase characters defined as erasable
- * by the DECSCA control function. DECSED works inside or outside the
- * scrolling margins.
- *
- * @args[0] defines which regions are erased. If it is 0, all cells from
- * the cursor (inclusive) till the end of the display are erase. If it
- * is 1, all cells from the start of the display till the cursor
- * (inclusive) are erased. If it is 2, all cells are erased.
- *
- * Defaults:
- * args[0]: 0
- */
-
- unsigned int mode = 0;
-
- if (seq->args[0] > 0)
- mode = seq->args[0];
-
- switch (mode) {
- case 0:
- term_page_erase(screen->page,
- screen->state.cursor_x, screen->state.cursor_y,
- screen->page->width, screen->page->height,
- &screen->state.attr, screen->age, true);
- break;
- case 1:
- term_page_erase(screen->page,
- 0, 0,
- screen->state.cursor_x, screen->state.cursor_y,
- &screen->state.attr, screen->age, true);
- break;
- case 2:
- term_page_erase(screen->page,
- 0, 0,
- screen->page->width, screen->page->height,
- &screen->state.attr, screen->age, true);
- break;
- }
-
- return 0;
-}
-
-static int screen_DECSEL(term_screen *screen, const term_seq *seq) {
- /*
- * DECSEL - selective-erase-in-line
- * This control function erases some or all of the erasable characters
- * in a single line of text. DECSEL erases only those characters defined
- * as erasable by the DECSCA control function. DECSEL works inside or
- * outside the scrolling margins.
- *
- * @args[0] defines the region to be erased. If it is 0, all cells from
- * the cursor (inclusive) till the end of the line are erase. If it is
- * 1, all cells from the start of the line till the cursor (inclusive)
- * are erased. If it is 2, the whole line of the cursor is erased.
- *
- * Defaults:
- * args[0]: 0
- */
-
- unsigned int mode = 0;
-
- if (seq->args[0] > 0)
- mode = seq->args[0];
-
- switch (mode) {
- case 0:
- term_page_erase(screen->page,
- screen->state.cursor_x, screen->state.cursor_y,
- screen->page->width, screen->state.cursor_y,
- &screen->state.attr, screen->age, true);
- break;
- case 1:
- term_page_erase(screen->page,
- 0, screen->state.cursor_y,
- screen->state.cursor_x, screen->state.cursor_y,
- &screen->state.attr, screen->age, true);
- break;
- case 2:
- term_page_erase(screen->page,
- 0, screen->state.cursor_y,
- screen->page->width, screen->state.cursor_y,
- &screen->state.attr, screen->age, true);
- break;
- }
-
- return 0;
-}
-
-static int screen_DECSERA(term_screen *screen, const term_seq *seq) {
- /*
- * DECSERA - selective-erase-rectangular-area
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSFC(term_screen *screen, const term_seq *seq) {
- /*
- * DECSFC - select-flow-control
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSKCV(term_screen *screen, const term_seq *seq) {
- /*
- * DECSKCV - set-key-click-volume
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSLCK(term_screen *screen, const term_seq *seq) {
- /*
- * DECSLCK - set-lock-key-style
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSLE(term_screen *screen, const term_seq *seq) {
- /*
- * DECSLE - select-locator-events
- *
- * TODO: implement
- */
-
- return 0;
-}
-
-static int screen_DECSLPP(term_screen *screen, const term_seq *seq) {
- /*
- * DECSLPP - set-lines-per-page
- * Set the number of lines used for the page. @args[0] specifies the
- * number of lines to be used. DEC only allows a limited number of
- * choices, however, we allow all integers. 0 is equivalent to 24.
- *
- * Defaults:
- * args[0]: 0
- *
- * TODO: implement
- */
-
- return 0;
-}
-
-static int screen_DECSLRM_OR_SC(term_screen *screen, const term_seq *seq) {
- /*
- * DECSLRM_OR_SC - set-left-and-right-margins or save-cursor
- *
- * TODO: Detect save-cursor and run it. DECSLRM is not worth
- * implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSMBV(term_screen *screen, const term_seq *seq) {
- /*
- * DECSMBV - set-margin-bell-volume
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSMKR(term_screen *screen, const term_seq *seq) {
- /*
- * DECSMKR - select-modifier-key-reporting
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSNLS(term_screen *screen, const term_seq *seq) {
- /*
- * DECSNLS - set-lines-per-screen
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSPP(term_screen *screen, const term_seq *seq) {
- /*
- * DECSPP - set-port-parameter
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSPPCS(term_screen *screen, const term_seq *seq) {
- /*
- * DECSPPCS - select-pro-printer-character-set
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSPRTT(term_screen *screen, const term_seq *seq) {
- /*
- * DECSPRTT - select-printer-type
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSR(term_screen *screen, const term_seq *seq) {
- /*
- * DECSR - secure-reset
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSRFR(term_screen *screen, const term_seq *seq) {
- /*
- * DECSRFR - select-refresh-rate
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSSCLS(term_screen *screen, const term_seq *seq) {
- /*
- * DECSSCLS - set-scroll-speed
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSSDT(term_screen *screen, const term_seq *seq) {
- /*
- * DECSSDT - select-status-display-line-type
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSSL(term_screen *screen, const term_seq *seq) {
- /*
- * DECSSL - select-setup-language
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECST8C(term_screen *screen, const term_seq *seq) {
- /*
- * DECST8C - set-tab-at-every-8-columns
- * Clear the tab-ruler and reset it to a tab at every 8th column,
- * starting at 9 (though, setting a tab at 1 is fine as it has no
- * effect).
- */
-
- unsigned int i;
-
- for (i = 0; i < screen->page->width; i += 8)
- screen->tabs[i / 8] = 0x1;
-
- return 0;
-}
-
-static int screen_DECSTBM(term_screen *screen, const term_seq *seq) {
- /*
- * DECSTBM - set-top-and-bottom-margins
- * This control function sets the top and bottom margins for the current
- * page. You cannot perform scrolling outside the margins.
- *
- * @args[0] defines the top margin, @args[1] defines the bottom margin.
- * The bottom margin must be lower than the top-margin.
- *
- * This call resets the cursor position to 0/0 of the page.
- *
- * Defaults:
- * args[0]: 1
- * args[1]: last page-line
- */
-
- unsigned int top, bottom;
-
- top = 1;
- bottom = screen->page->height;
-
- if (seq->args[0] > 0)
- top = seq->args[0];
- if (seq->args[1] > 0)
- bottom = seq->args[1];
-
- if (top > screen->page->height)
- top = screen->page->height;
- if (bottom > screen->page->height)
- bottom = screen->page->height;
-
- if (top >= bottom || top > screen->page->height || bottom > screen->page->height) {
- top = 1;
- bottom = screen->page->height;
- }
-
- term_page_set_scroll_region(screen->page, top - 1, bottom - top + 1);
- screen_cursor_clear_wrap(screen);
- screen_cursor_set(screen, 0, 0);
-
- return 0;
-}
-
-static int screen_DECSTR(term_screen *screen, const term_seq *seq) {
- /*
- * DECSTR - soft-terminal-reset
- * Perform a soft reset to the default values.
- */
-
- term_screen_soft_reset(screen);
-
- return 0;
-}
-
-static int screen_DECSTRL(term_screen *screen, const term_seq *seq) {
- /*
- * DECSTRL - set-transmit-rate-limit
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSWBV(term_screen *screen, const term_seq *seq) {
- /*
- * DECSWBV - set-warning-bell-volume
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECSWL(term_screen *screen, const term_seq *seq) {
- /*
- * DECSWL - single-width-single-height-line
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECTID(term_screen *screen, const term_seq *seq) {
- /*
- * DECTID - select-terminal-id
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECTME(term_screen *screen, const term_seq *seq) {
- /*
- * DECTME - terminal-mode-emulation
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DECTST(term_screen *screen, const term_seq *seq) {
- /*
- * DECTST - invoke-confidence-test
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_DL(term_screen *screen, const term_seq *seq) {
- /*
- * DL - delete-line
- * This control function deletes one or more lines in the scrolling
- * region, starting with the line that has the cursor. @args[0] defines
- * the number of lines to delete. 0 is treated the same as 1.
- * As lines are deleted, lines below the cursor and in the scrolling
- * region move up. The terminal adds blank lines with no visual
- * character attributes at the bottom of the scrolling region. If it is
- * greater than the number of lines remaining on the page, DL deletes
- * only the remaining lines. DL has no effect outside the scrolling
- * margins.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- term_page_delete_lines(screen->page, screen->state.cursor_y, num, &screen->state.attr, screen->age);
-
- return 0;
-}
-
-static int screen_DSR_ANSI(term_screen *screen, const term_seq *seq) {
- /*
- * DSR_ANSI - device-status-report-ansi
- *
- * TODO: implement
- */
-
- return 0;
-}
-
-static int screen_DSR_DEC(term_screen *screen, const term_seq *seq) {
- /*
- * DSR_DEC - device-status-report-dec
- *
- * TODO: implement
- */
-
- return 0;
-}
-
-static int screen_ECH(term_screen *screen, const term_seq *seq) {
- /*
- * ECH - erase-character
- * This control function erases one or more characters, from the cursor
- * position to the right. ECH clears character attributes from erased
- * character positions. ECH works inside or outside the scrolling
- * margins.
- * @args[0] defines the number of characters to erase. 0 is treated the
- * same as 1.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- term_page_erase(screen->page,
- screen->state.cursor_x, screen->state.cursor_y,
- screen->state.cursor_x + num, screen->state.cursor_y,
- &screen->state.attr, screen->age, false);
-
- return 0;
-}
-
-static int screen_ED(term_screen *screen, const term_seq *seq) {
- /*
- * ED - erase-in-display
- * This control function erases characters from part or all of the
- * display. When you erase complete lines, they become single-height,
- * single-width lines, with all visual character attributes cleared. ED
- * works inside or outside the scrolling margins.
- *
- * @args[0] defines the region to erase. 0 means from cursor (inclusive)
- * till the end of the screen. 1 means from the start of the screen till
- * the cursor (inclusive) and 2 means the whole screen.
- *
- * Defaults:
- * args[0]: 0
- */
-
- unsigned int mode = 0;
-
- if (seq->args[0] > 0)
- mode = seq->args[0];
-
- switch (mode) {
- case 0:
- term_page_erase(screen->page,
- screen->state.cursor_x, screen->state.cursor_y,
- screen->page->width, screen->page->height,
- &screen->state.attr, screen->age, false);
- break;
- case 1:
- term_page_erase(screen->page,
- 0, 0,
- screen->state.cursor_x, screen->state.cursor_y,
- &screen->state.attr, screen->age, false);
- break;
- case 2:
- term_page_erase(screen->page,
- 0, 0,
- screen->page->width, screen->page->height,
- &screen->state.attr, screen->age, false);
- break;
- }
-
- return 0;
-}
-
-static int screen_EL(term_screen *screen, const term_seq *seq) {
- /*
- * EL - erase-in-line
- * This control function erases characters on the line that has the
- * cursor. EL clears all character attributes from erased character
- * positions. EL works inside or outside the scrolling margins.
- *
- * @args[0] defines the region to erase. 0 means from cursor (inclusive)
- * till the end of the line. 1 means from the start of the line till the
- * cursor (inclusive) and 2 means the whole line.
- *
- * Defaults:
- * args[0]: 0
- */
-
- unsigned int mode = 0;
-
- if (seq->args[0] > 0)
- mode = seq->args[0];
-
- switch (mode) {
- case 0:
- term_page_erase(screen->page,
- screen->state.cursor_x, screen->state.cursor_y,
- screen->page->width, screen->state.cursor_y,
- &screen->state.attr, screen->age, false);
- break;
- case 1:
- term_page_erase(screen->page,
- 0, screen->state.cursor_y,
- screen->state.cursor_x, screen->state.cursor_y,
- &screen->state.attr, screen->age, false);
- break;
- case 2:
- term_page_erase(screen->page,
- 0, screen->state.cursor_y,
- screen->page->width, screen->state.cursor_y,
- &screen->state.attr, screen->age, false);
- break;
- }
-
- return 0;
-}
-
-static int screen_ENQ(term_screen *screen, const term_seq *seq) {
- /*
- * ENQ - enquiry
- * Transmit the answerback-string. If none is set, do nothing.
- */
-
- if (screen->answerback)
- return screen_write(screen, screen->answerback, strlen(screen->answerback));
-
- return 0;
-}
-
-static int screen_EPA(term_screen *screen, const term_seq *seq) {
- /*
- * EPA - end-of-guarded-area
- *
- * TODO: What is this?
- */
-
- return 0;
-}
-
-static int screen_FF(term_screen *screen, const term_seq *seq) {
- /*
- * FF - form-feed
- * This causes the cursor to jump to the next line. It is treated the
- * same as LF.
- */
-
- return screen_LF(screen, seq);
-}
-
-static int screen_HPA(term_screen *screen, const term_seq *seq) {
- /*
- * HPA - horizontal-position-absolute
- * HPA causes the active position to be moved to the n-th horizontal
- * position of the active line. If an attempt is made to move the active
- * position past the last position on the line, then the active position
- * stops at the last position on the line.
- *
- * @args[0] defines the horizontal position. 0 is treated as 1.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_set(screen, num - 1, screen->state.cursor_y);
-
- return 0;
-}
-
-static int screen_HPR(term_screen *screen, const term_seq *seq) {
- /*
- * HPR - horizontal-position-relative
- * HPR causes the active position to be moved to the n-th following
- * horizontal position of the active line. If an attempt is made to move
- * the active position past the last position on the line, then the
- * active position stops at the last position on the line.
- *
- * @args[0] defines the horizontal position. 0 is treated as 1.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_right(screen, num);
-
- return 0;
-}
-
-static int screen_HT(term_screen *screen, const term_seq *seq) {
- /*
- * HT - horizontal-tab
- * Moves the cursor to the next tab stop. If there are no more tab
- * stops, the cursor moves to the right margin. HT does not cause text
- * to auto wrap.
- */
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_right_tab(screen, 1);
-
- return 0;
-}
-
-static int screen_HTS(term_screen *screen, const term_seq *seq) {
- /*
- * HTS - horizontal-tab-set
- * HTS sets a horizontal tab stop at the column position indicated by
- * the value of the active column when the terminal receives an HTS.
- *
- * Executing an HTS does not effect the other horizontal tab stop
- * settings.
- */
-
- unsigned int pos;
-
- pos = screen->state.cursor_x;
- if (screen->page->width > 0)
- screen->tabs[pos / 8] |= 1U << (pos % 8);
-
- return 0;
-}
-
-static int screen_HVP(term_screen *screen, const term_seq *seq) {
- /*
- * HVP - horizontal-and-vertical-position
- * This control function works the same as the cursor position (CUP)
- * function. Origin mode (DECOM) selects line numbering and the ability
- * to move the cursor into margins.
- *
- * Defaults:
- * args[0]: 1
- * args[1]: 1
- */
-
- return screen_CUP(screen, seq);
-}
-
-static int screen_ICH(term_screen *screen, const term_seq *seq) {
- /*
- * ICH - insert-character
- * This control function inserts one or more space (SP) characters
- * starting at the cursor position. @args[0] is the number of characters
- * to insert. 0 is treated as 1.
- *
- * The ICH sequence inserts blank characters with the normal
- * character attribute. The cursor remains at the beginning of the blank
- * characters. Text between the cursor and right margin moves to the
- * right. Characters scrolled past the right margin are lost. ICH has no
- * effect outside the scrolling margins.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- term_page_insert_cells(screen->page, screen->state.cursor_x, screen->state.cursor_y, num, &screen->state.attr, screen->age);
-
- return 0;
-}
-
-static int screen_IL(term_screen *screen, const term_seq *seq) {
- /*
- * IL - insert-line
- * This control function inserts one or more blank lines, starting at
- * the cursor. @args[0] is the number of lines to insert. 0 is treated
- * as 1.
- *
- * As lines are inserted, lines below the cursor and in the scrolling
- * region move down. Lines scrolled off the page are lost. IL has no
- * effect outside the page margins.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- term_page_insert_lines(screen->page, screen->state.cursor_y, num, &screen->state.attr, screen->age);
-
- return 0;
-}
-
-static int screen_IND(term_screen *screen, const term_seq *seq) {
- /*
- * IND - index
- * IND moves the cursor down one line in the same column. If the cursor
- * is at the bottom margin, then the screen performs a scroll-up.
- */
-
- screen_cursor_down(screen, 1, true);
-
- return 0;
-}
-
-static int screen_LF(term_screen *screen, const term_seq *seq) {
- /*
- * LF - line-feed
- * Causes a line feed or a new line operation, depending on the setting
- * of line feed/new line mode.
- */
-
- screen_cursor_down(screen, 1, true);
- if (screen->flags & TERM_FLAG_NEWLINE_MODE)
- screen_cursor_left(screen, screen->state.cursor_x);
-
- return 0;
-}
-
-static int screen_LS1R(term_screen *screen, const term_seq *seq) {
- /*
- * LS1R - locking-shift-1-right
- * Map G1 into GR.
- */
-
- screen->state.gr = &screen->g1;
-
- return 0;
-}
-
-static int screen_LS2(term_screen *screen, const term_seq *seq) {
- /*
- * LS2 - locking-shift-2
- * Map G2 into GL.
- */
-
- screen->state.gl = &screen->g2;
-
- return 0;
-}
-
-static int screen_LS2R(term_screen *screen, const term_seq *seq) {
- /*
- * LS2R - locking-shift-2-right
- * Map G2 into GR.
- */
-
- screen->state.gr = &screen->g2;
-
- return 0;
-}
-
-static int screen_LS3(term_screen *screen, const term_seq *seq) {
- /*
- * LS3 - locking-shift-3
- * Map G3 into GL.
- */
-
- screen->state.gl = &screen->g3;
-
- return 0;
-}
-
-static int screen_LS3R(term_screen *screen, const term_seq *seq) {
- /*
- * LS3R - locking-shift-3-right
- * Map G3 into GR.
- */
-
- screen->state.gr = &screen->g3;
-
- return 0;
-}
-
-static int screen_MC_ANSI(term_screen *screen, const term_seq *seq) {
- /*
- * MC_ANSI - media-copy-ansi
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_MC_DEC(term_screen *screen, const term_seq *seq) {
- /*
- * MC_DEC - media-copy-dec
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_NEL(term_screen *screen, const term_seq *seq) {
- /*
- * NEL - next-line
- * Moves cursor to first position on next line. If cursor is at bottom
- * margin, then screen performs a scroll-up.
- */
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_down(screen, 1, true);
- screen_cursor_set(screen, 0, screen->state.cursor_y);
-
- return 0;
-}
-
-static int screen_NP(term_screen *screen, const term_seq *seq) {
- /*
- * NP - next-page
- * This control function moves the cursor forward to the home position
- * on one of the following pages in page memory. If there is only one
- * page, then the terminal ignores NP.
- * If NP tries to move the cursor past the last page in memory, then the
- * cursor stops at the last page.
- *
- * @args[0] defines the number of pages to forward. 0 is treated as 1.
- *
- * Defaults:
- * args[0]: 1
- *
- * Probably not worth implementing. We only support a single page.
- */
-
- return 0;
-}
-
-static int screen_NULL(term_screen *screen, const term_seq *seq) {
- /*
- * NULL - null
- * The NULL operation does nothing. ASCII NULL is always ignored.
- */
-
- return 0;
-}
-
-static int screen_PP(term_screen *screen, const term_seq *seq) {
- /*
- * PP - preceding-page
- * This control function moves the cursor backward to the home position
- * on one of the preceding pages in page memory. If there is only one
- * page, then the terminal ignores PP.
- * If PP tries to move the cursor back farther than the first page in
- * memory, then the cursor stops at the first page.
- *
- * @args[0] defines the number of pages to go backwards. 0 is treated
- * as 1.
- *
- * Defaults:
- * args[0]: 1
- *
- * Probably not worth implementing. We only support a single page.
- */
-
- return 0;
-}
-
-static int screen_PPA(term_screen *screen, const term_seq *seq) {
- /*
- * PPA - page-position-absolute
- * This control function can move the cursor to the corresponding row
- * and column on any page in page memory. You select the page by its
- * number. If there is only one page, then the terminal ignores PPA.
- *
- * @args[0] is the number of the page to move the cursor to. If it is
- * greater than the number of the last page in memory, then the cursor
- * stops at the last page. If it is less than the number of the first
- * page, then the cursor stops at the first page.
- *
- * Defaults:
- * args[0]: 1
- *
- * Probably not worth implementing. We only support a single page.
- */
-
- return 0;
-}
-
-static int screen_PPB(term_screen *screen, const term_seq *seq) {
- /*
- * PPB - page-position-backward
- * This control function moves the cursor backward to the corresponding
- * row and column on one of the preceding pages in page memory. If there
- * is only one page, then the terminal ignores PPB.
- *
- * @args[0] indicates the number of pages to move the cursor backward.
- * If it tries to move the cursor back farther than the first page in
- * memory, then the cursor stops at the first page. 0 is treated as 1.
- *
- * Defaults:
- * args[0]: 1
- *
- * Probably not worth implementing. We only support a single page.
- */
-
- return 0;
-}
-
-static int screen_PPR(term_screen *screen, const term_seq *seq) {
- /*
- * PPR - page-position-relative
- * This control function moves the cursor forward to the corresponding
- * row and column on one of the following pages in page memory. If there
- * is only one page, then the terminal ignores PPR.
- *
- * @args[0] indicates how many pages to move the cursor forward. If it
- * tries to move the cursor beyond the last page in memory, then the
- * cursor stops at the last page. 0 is treated as 1.
- *
- * Defaults:
- * args[0]: 1
- *
- * Probably not worth implementing. We only support a single page.
- */
-
- return 0;
-}
-
-static int screen_RC(term_screen *screen, const term_seq *seq) {
- /*
- * RC - restore-cursor
- */
-
- return screen_DECRC(screen, seq);
-}
-
-static int screen_REP(term_screen *screen, const term_seq *seq) {
- /*
- * REP - repeat
- * Repeat the preceding graphics-character the given number of times.
- * @args[0] specifies how often it shall be repeated. 0 is treated as 1.
- *
- * Defaults:
- * args[0]: 1
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_RI(term_screen *screen, const term_seq *seq) {
- /*
- * RI - reverse-index
- * Moves the cursor up one line in the same column. If the cursor is at
- * the top margin, the page scrolls down.
- */
-
- screen_cursor_up(screen, 1, true);
-
- return 0;
-}
-
-static int screen_RIS(term_screen *screen, const term_seq *seq) {
- /*
- * RIS - reset-to-initial-state
- * This control function causes a nonvolatile memory (NVR) recall to
- * occur. RIS replaces all set-up features with their saved settings.
- *
- * The terminal stores these saved settings in NVR memory. The saved
- * setting for a feature is the same as the factory-default setting,
- * unless you saved a new setting.
- */
-
- term_screen_hard_reset(screen);
-
- return 0;
-}
-
-static int screen_RM_ANSI(term_screen *screen, const term_seq *seq) {
- /*
- * RM_ANSI - reset-mode-ansi
- *
- * TODO: implement (see VT510rm manual)
- */
-
- unsigned int i;
-
- for (i = 0; i < seq->n_args; ++i)
- screen_mode_change_ansi(screen, seq->args[i], false);
-
- return 0;
-}
-
-static int screen_RM_DEC(term_screen *screen, const term_seq *seq) {
- /*
- * RM_DEC - reset-mode-dec
- * This is the same as RM_ANSI but for DEC modes.
- */
-
- unsigned int i;
-
- for (i = 0; i < seq->n_args; ++i)
- screen_mode_change_dec(screen, seq->args[i], false);
-
- return 0;
-}
-
-static int screen_S7C1T(term_screen *screen, const term_seq *seq) {
- /*
- * S7C1T - set-7bit-c1-terminal
- * This causes the terminal to start sending C1 controls as 7bit
- * sequences instead of 8bit C1 controls.
- * This is ignored if the terminal is below level-2 emulation mode
- * (VT100 and below), the terminal already sends 7bit controls then.
- */
-
- if (screen->conformance_level > TERM_CONFORMANCE_LEVEL_VT100)
- screen->flags |= TERM_FLAG_7BIT_MODE;
-
- return 0;
-}
-
-static int screen_S8C1T(term_screen *screen, const term_seq *seq) {
- /*
- * S8C1T - set-8bit-c1-terminal
- * This causes the terminal to start sending C1 controls as 8bit C1
- * control instead of 7bit sequences.
- * This is ignored if the terminal is below level-2 emulation mode
- * (VT100 and below). The terminal always sends 7bit controls in those
- * modes.
- */
-
- if (screen->conformance_level > TERM_CONFORMANCE_LEVEL_VT100)
- screen->flags &= ~TERM_FLAG_7BIT_MODE;
-
- return 0;
-}
-
-static int screen_SCS(term_screen *screen, const term_seq *seq) {
- /*
- * SCS - select-character-set
- * Designate character sets to G-sets. The mapping from intermediates
- * and terminal characters in the escape sequence to G-sets and
- * character-sets is non-trivial and implemented separately. See there
- * for more information.
- * This call simply sets the selected G-set to the desired
- * character-set.
- */
-
- term_charset *cs = NULL;
-
- /* TODO: support more of them? */
- switch (seq->charset) {
- case TERM_CHARSET_ISO_LATIN1_SUPPLEMENTAL:
- case TERM_CHARSET_ISO_LATIN2_SUPPLEMENTAL:
- case TERM_CHARSET_ISO_LATIN5_SUPPLEMENTAL:
- case TERM_CHARSET_ISO_GREEK_SUPPLEMENTAL:
- case TERM_CHARSET_ISO_HEBREW_SUPPLEMENTAL:
- case TERM_CHARSET_ISO_LATIN_CYRILLIC:
- break;
-
- case TERM_CHARSET_DEC_SPECIAL_GRAPHIC:
- cs = &term_dec_special_graphics;
- break;
- case TERM_CHARSET_DEC_SUPPLEMENTAL:
- cs = &term_dec_supplemental_graphics;
- break;
- case TERM_CHARSET_DEC_TECHNICAL:
- case TERM_CHARSET_CYRILLIC_DEC:
- case TERM_CHARSET_DUTCH_NRCS:
- case TERM_CHARSET_FINNISH_NRCS:
- case TERM_CHARSET_FRENCH_NRCS:
- case TERM_CHARSET_FRENCH_CANADIAN_NRCS:
- case TERM_CHARSET_GERMAN_NRCS:
- case TERM_CHARSET_GREEK_DEC:
- case TERM_CHARSET_GREEK_NRCS:
- case TERM_CHARSET_HEBREW_DEC:
- case TERM_CHARSET_HEBREW_NRCS:
- case TERM_CHARSET_ITALIAN_NRCS:
- case TERM_CHARSET_NORWEGIAN_DANISH_NRCS:
- case TERM_CHARSET_PORTUGUESE_NRCS:
- case TERM_CHARSET_RUSSIAN_NRCS:
- case TERM_CHARSET_SCS_NRCS:
- case TERM_CHARSET_SPANISH_NRCS:
- case TERM_CHARSET_SWEDISH_NRCS:
- case TERM_CHARSET_SWISS_NRCS:
- case TERM_CHARSET_TURKISH_DEC:
- case TERM_CHARSET_TURKISH_NRCS:
- break;
-
- case TERM_CHARSET_USERPREF_SUPPLEMENTAL:
- break;
- }
-
- if (seq->intermediates & TERM_SEQ_FLAG_POPEN)
- screen->g0 = cs ? : &term_unicode_lower;
- else if (seq->intermediates & TERM_SEQ_FLAG_PCLOSE)
- screen->g1 = cs ? : &term_unicode_upper;
- else if (seq->intermediates & TERM_SEQ_FLAG_MULT)
- screen->g2 = cs ? : &term_unicode_lower;
- else if (seq->intermediates & TERM_SEQ_FLAG_PLUS)
- screen->g3 = cs ? : &term_unicode_upper;
- else if (seq->intermediates & TERM_SEQ_FLAG_MINUS)
- screen->g1 = cs ? : &term_unicode_upper;
- else if (seq->intermediates & TERM_SEQ_FLAG_DOT)
- screen->g2 = cs ? : &term_unicode_lower;
- else if (seq->intermediates & TERM_SEQ_FLAG_SLASH)
- screen->g3 = cs ? : &term_unicode_upper;
-
- return 0;
-}
-
-static int screen_SD(term_screen *screen, const term_seq *seq) {
- /*
- * SD - scroll-down
- * This control function moves the user window down a specified number
- * of lines in page memory.
- * @args[0] is the number of lines to move the
- * user window up in page memory. New lines appear at the top of the
- * display. Old lines disappear at the bottom of the display. You
- * cannot pan past the top margin of the current page. 0 is treated
- * as 1.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- term_page_scroll_down(screen->page, num, &screen->state.attr, screen->age, NULL);
-
- return 0;
-}
-
-static int screen_SGR(term_screen *screen, const term_seq *seq) {
- /*
- * SGR - select-graphics-rendition
- */
-
- term_color *dst;
- unsigned int i, code;
- int v;
-
- if (seq->n_args < 1) {
- zero(screen->state.attr);
- return 0;
- }
-
- for (i = 0; i < seq->n_args; ++i) {
- v = seq->args[i];
- switch (v) {
- case 1:
- screen->state.attr.bold = 1;
- break;
- case 3:
- screen->state.attr.italic = 1;
- break;
- case 4:
- screen->state.attr.underline = 1;
- break;
- case 5:
- screen->state.attr.blink = 1;
- break;
- case 7:
- screen->state.attr.inverse = 1;
- break;
- case 8:
- screen->state.attr.hidden = 1;
- break;
- case 22:
- screen->state.attr.bold = 0;
- break;
- case 23:
- screen->state.attr.italic = 0;
- break;
- case 24:
- screen->state.attr.underline = 0;
- break;
- case 25:
- screen->state.attr.blink = 0;
- break;
- case 27:
- screen->state.attr.inverse = 0;
- break;
- case 28:
- screen->state.attr.hidden = 0;
- break;
- case 30 ... 37:
- screen->state.attr.fg.ccode = v - 30 + TERM_CCODE_BLACK;
- break;
- case 39:
- screen->state.attr.fg.ccode = 0;
- break;
- case 40 ... 47:
- screen->state.attr.bg.ccode = v - 40 + TERM_CCODE_BLACK;
- break;
- case 49:
- screen->state.attr.bg.ccode = 0;
- break;
- case 90 ... 97:
- screen->state.attr.fg.ccode = v - 90 + TERM_CCODE_LIGHT_BLACK;
- break;
- case 100 ... 107:
- screen->state.attr.bg.ccode = v - 100 + TERM_CCODE_LIGHT_BLACK;
- break;
- case 38:
- /* fallthrough */
- case 48:
-
- if (v == 38)
- dst = &screen->state.attr.fg;
- else
- dst = &screen->state.attr.bg;
-
- ++i;
- if (i >= seq->n_args)
- break;
-
- switch (seq->args[i]) {
- case 2:
- /* 24bit-color support */
-
- i += 3;
- if (i >= seq->n_args)
- break;
-
- dst->ccode = TERM_CCODE_RGB;
- dst->red = (seq->args[i - 2] >= 0) ? seq->args[i - 2] : 0;
- dst->green = (seq->args[i - 1] >= 0) ? seq->args[i - 1] : 0;
- dst->blue = (seq->args[i] >= 0) ? seq->args[i] : 0;
-
- break;
- case 5:
- /* 256-color support */
-
- ++i;
- if (i >= seq->n_args || seq->args[i] < 0)
- break;
-
- dst->ccode = TERM_CCODE_256;
- code = seq->args[i];
- dst->c256 = code < 256 ? code : 0;
-
- break;
- }
-
- break;
- case -1:
- /* fallthrough */
- case 0:
- zero(screen->state.attr);
- break;
- }
- }
-
- return 0;
-}
-
-static int screen_SI(term_screen *screen, const term_seq *seq) {
- /*
- * SI - shift-in
- * Map G0 into GL.
- */
-
- screen->state.gl = &screen->g0;
-
- return 0;
-}
-
-static int screen_SM_ANSI(term_screen *screen, const term_seq *seq) {
- /*
- * SM_ANSI - set-mode-ansi
- *
- * TODO: implement
- */
-
- unsigned int i;
-
- for (i = 0; i < seq->n_args; ++i)
- screen_mode_change_ansi(screen, seq->args[i], true);
-
- return 0;
-}
-
-static int screen_SM_DEC(term_screen *screen, const term_seq *seq) {
- /*
- * SM_DEC - set-mode-dec
- * This is the same as SM_ANSI but for DEC modes.
- */
-
- unsigned int i;
-
- for (i = 0; i < seq->n_args; ++i)
- screen_mode_change_dec(screen, seq->args[i], true);
-
- return 0;
-}
-
-static int screen_SO(term_screen *screen, const term_seq *seq) {
- /*
- * SO - shift-out
- * Map G1 into GL.
- */
-
- screen->state.gl = &screen->g1;
-
- return 0;
-}
-
-static int screen_SPA(term_screen *screen, const term_seq *seq) {
- /*
- * SPA - start-of-protected-area
- *
- * TODO: What is this?
- */
-
- return 0;
-}
-
-static int screen_SS2(term_screen *screen, const term_seq *seq) {
- /*
- * SS2 - single-shift-2
- * Temporarily map G2 into GL for the next graphics character.
- */
-
- screen->state.glt = &screen->g2;
-
- return 0;
-}
-
-static int screen_SS3(term_screen *screen, const term_seq *seq) {
- /*
- * SS3 - single-shift-3
- * Temporarily map G3 into GL for the next graphics character
- */
-
- screen->state.glt = &screen->g3;
-
- return 0;
-}
-
-static int screen_ST(term_screen *screen, const term_seq *seq) {
- /*
- * ST - string-terminator
- * The string-terminator is usually part of control-sequences and
- * handled by the parser. In all other situations it is silently
- * ignored.
- */
-
- return 0;
-}
-
-static int screen_SU(term_screen *screen, const term_seq *seq) {
- /*
- * SU - scroll-up
- * This control function moves the user window up a specified number of
- * lines in page memory.
- * @args[0] is the number of lines to move the
- * user window down in page memory. New lines appear at the bottom of
- * the display. Old lines disappear at the top of the display. You
- * cannot pan past the bottom margin of the current page. 0 is treated
- * as 1.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- term_page_scroll_up(screen->page, num, &screen->state.attr, screen->age, screen->history);
-
- return 0;
-}
-
-static int screen_SUB(term_screen *screen, const term_seq *seq) {
- /*
- * SUB - substitute
- * Cancel the current control-sequence and print a replacement
- * character. Our parser already handles this so all we have to do is
- * print the replacement character.
- */
-
- static const term_seq rep = {
- .type = TERM_SEQ_GRAPHIC,
- .command = TERM_CMD_GRAPHIC,
- .terminator = 0xfffd,
- };
-
- return screen_GRAPHIC(screen, &rep);
-}
-
-static int screen_TBC(term_screen *screen, const term_seq *seq) {
- /*
- * TBC - tab-clear
- * This clears tab-stops. If @args[0] is 0, the tab-stop at the current
- * cursor position is cleared. If it is 3, all tab stops are cleared.
- *
- * Defaults:
- * args[0]: 0
- */
-
- unsigned int mode = 0, pos;
-
- if (seq->args[0] > 0)
- mode = seq->args[0];
-
- switch (mode) {
- case 0:
- pos = screen->state.cursor_x;
- if (screen->page->width > 0)
- screen->tabs[pos / 8] &= ~(1U << (pos % 8));
- break;
- case 3:
- if (screen->page->width > 0)
- memzero(screen->tabs, (screen->page->width + 7) / 8);
- break;
- }
-
- return 0;
-}
-
-static int screen_VPA(term_screen *screen, const term_seq *seq) {
- /*
- * VPA - vertical-line-position-absolute
- * VPA causes the active position to be moved to the corresponding
- * horizontal position. @args[0] specifies the line to jump to. If an
- * attempt is made to move the active position below the last line, then
- * the active position stops on the last line. 0 is treated as 1.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int pos = 1;
-
- if (seq->args[0] > 0)
- pos = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_set_rel(screen, screen->state.cursor_x, pos - 1);
-
- return 0;
-}
-
-static int screen_VPR(term_screen *screen, const term_seq *seq) {
- /*
- * VPR - vertical-line-position-relative
- * VPR causes the active position to be moved to the corresponding
- * horizontal position. @args[0] specifies the number of lines to jump
- * down relative to the current cursor position. If an attempt is made
- * to move the active position below the last line, the active position
- * stops at the last line. 0 is treated as 1.
- *
- * Defaults:
- * args[0]: 1
- */
-
- unsigned int num = 1;
-
- if (seq->args[0] > 0)
- num = seq->args[0];
-
- screen_cursor_clear_wrap(screen);
- screen_cursor_down(screen, num, false);
-
- return 0;
-}
-
-static int screen_VT(term_screen *screen, const term_seq *seq) {
- /*
- * VT - vertical-tab
- * This causes a vertical jump by one line. Terminals treat it exactly
- * the same as LF.
- */
-
- return screen_LF(screen, seq);
-}
-
-static int screen_XTERM_CLLHP(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_CLLHP - xterm-cursor-lower-left-hp-bugfix
- * Move the cursor to the lower-left corner of the page. This is an HP
- * bugfix by xterm.
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_IHMT(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_IHMT - xterm-initiate-highlight-mouse-tracking
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_MLHP(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_MLHP - xterm-memory-lock-hp-bugfix
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_MUHP(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_MUHP - xterm-memory-unlock-hp-bugfix
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_RPM(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_RPM - xterm-restore-private-mode
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_RRV(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_RRV - xterm-reset-resource-value
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_RTM(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_RTM - xterm-reset-title-mode
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_SACL1(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_SACL1 - xterm-set-ansi-conformance-level-1
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_SACL2(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_SACL2 - xterm-set-ansi-conformance-level-2
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_SACL3(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_SACL3 - xterm-set-ansi-conformance-level-3
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_SDCS(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_SDCS - xterm-set-default-character-set
- * Select the default character set. We treat this the same as UTF-8 as
- * this is our default character set. As we always use UTF-8, this
- * becomes as no-op.
- */
-
- return 0;
-}
-
-static int screen_XTERM_SGFX(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_SGFX - xterm-sixel-graphics
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_SPM(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_SPM - xterm-set-private-mode
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_SRV(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_SRV - xterm-set-resource-value
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_STM(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_STM - xterm-set-title-mode
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-static int screen_XTERM_SUCS(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_SUCS - xterm-select-utf8-character-set
- * Select UTF-8 as character set. This is our default on only character
- * set. Hence, this is a no-op.
- */
-
- return 0;
-}
-
-static int screen_XTERM_WM(term_screen *screen, const term_seq *seq) {
- /*
- * XTERM_WM - xterm-window-management
- *
- * Probably not worth implementing.
- */
-
- return 0;
-}
-
-/*
- * Feeding data
- * The screen_feed_*() handlers take data from the user and feed it into the
- * screen. Once the parser has detected a sequence, we parse the command-type
- * and forward it to the command-dispatchers.
- */
-
-static int screen_feed_cmd(term_screen *screen, const term_seq *seq) {
- switch (seq->command) {
- case TERM_CMD_GRAPHIC:
- return screen_GRAPHIC(screen, seq);
- case TERM_CMD_BEL:
- return screen_BEL(screen, seq);
- case TERM_CMD_BS:
- return screen_BS(screen, seq);
- case TERM_CMD_CBT:
- return screen_CBT(screen, seq);
- case TERM_CMD_CHA:
- return screen_CHA(screen, seq);
- case TERM_CMD_CHT:
- return screen_CHT(screen, seq);
- case TERM_CMD_CNL:
- return screen_CNL(screen, seq);
- case TERM_CMD_CPL:
- return screen_CPL(screen, seq);
- case TERM_CMD_CR:
- return screen_CR(screen, seq);
- case TERM_CMD_CUB:
- return screen_CUB(screen, seq);
- case TERM_CMD_CUD:
- return screen_CUD(screen, seq);
- case TERM_CMD_CUF:
- return screen_CUF(screen, seq);
- case TERM_CMD_CUP:
- return screen_CUP(screen, seq);
- case TERM_CMD_CUU:
- return screen_CUU(screen, seq);
- case TERM_CMD_DA1:
- return screen_DA1(screen, seq);
- case TERM_CMD_DA2:
- return screen_DA2(screen, seq);
- case TERM_CMD_DA3:
- return screen_DA3(screen, seq);
- case TERM_CMD_DC1:
- return screen_DC1(screen, seq);
- case TERM_CMD_DC3:
- return screen_DC3(screen, seq);
- case TERM_CMD_DCH:
- return screen_DCH(screen, seq);
- case TERM_CMD_DECALN:
- return screen_DECALN(screen, seq);
- case TERM_CMD_DECANM:
- return screen_DECANM(screen, seq);
- case TERM_CMD_DECBI:
- return screen_DECBI(screen, seq);
- case TERM_CMD_DECCARA:
- return screen_DECCARA(screen, seq);
- case TERM_CMD_DECCRA:
- return screen_DECCRA(screen, seq);
- case TERM_CMD_DECDC:
- return screen_DECDC(screen, seq);
- case TERM_CMD_DECDHL_BH:
- return screen_DECDHL_BH(screen, seq);
- case TERM_CMD_DECDHL_TH:
- return screen_DECDHL_TH(screen, seq);
- case TERM_CMD_DECDWL:
- return screen_DECDWL(screen, seq);
- case TERM_CMD_DECEFR:
- return screen_DECEFR(screen, seq);
- case TERM_CMD_DECELF:
- return screen_DECELF(screen, seq);
- case TERM_CMD_DECELR:
- return screen_DECELR(screen, seq);
- case TERM_CMD_DECERA:
- return screen_DECERA(screen, seq);
- case TERM_CMD_DECFI:
- return screen_DECFI(screen, seq);
- case TERM_CMD_DECFRA:
- return screen_DECFRA(screen, seq);
- case TERM_CMD_DECIC:
- return screen_DECIC(screen, seq);
- case TERM_CMD_DECID:
- return screen_DECID(screen, seq);
- case TERM_CMD_DECINVM:
- return screen_DECINVM(screen, seq);
- case TERM_CMD_DECKBD:
- return screen_DECKBD(screen, seq);
- case TERM_CMD_DECKPAM:
- return screen_DECKPAM(screen, seq);
- case TERM_CMD_DECKPNM:
- return screen_DECKPNM(screen, seq);
- case TERM_CMD_DECLFKC:
- return screen_DECLFKC(screen, seq);
- case TERM_CMD_DECLL:
- return screen_DECLL(screen, seq);
- case TERM_CMD_DECLTOD:
- return screen_DECLTOD(screen, seq);
- case TERM_CMD_DECPCTERM:
- return screen_DECPCTERM(screen, seq);
- case TERM_CMD_DECPKA:
- return screen_DECPKA(screen, seq);
- case TERM_CMD_DECPKFMR:
- return screen_DECPKFMR(screen, seq);
- case TERM_CMD_DECRARA:
- return screen_DECRARA(screen, seq);
- case TERM_CMD_DECRC:
- return screen_DECRC(screen, seq);
- case TERM_CMD_DECREQTPARM:
- return screen_DECREQTPARM(screen, seq);
- case TERM_CMD_DECRPKT:
- return screen_DECRPKT(screen, seq);
- case TERM_CMD_DECRQCRA:
- return screen_DECRQCRA(screen, seq);
- case TERM_CMD_DECRQDE:
- return screen_DECRQDE(screen, seq);
- case TERM_CMD_DECRQKT:
- return screen_DECRQKT(screen, seq);
- case TERM_CMD_DECRQLP:
- return screen_DECRQLP(screen, seq);
- case TERM_CMD_DECRQM_ANSI:
- return screen_DECRQM_ANSI(screen, seq);
- case TERM_CMD_DECRQM_DEC:
- return screen_DECRQM_DEC(screen, seq);
- case TERM_CMD_DECRQPKFM:
- return screen_DECRQPKFM(screen, seq);
- case TERM_CMD_DECRQPSR:
- return screen_DECRQPSR(screen, seq);
- case TERM_CMD_DECRQTSR:
- return screen_DECRQTSR(screen, seq);
- case TERM_CMD_DECRQUPSS:
- return screen_DECRQUPSS(screen, seq);
- case TERM_CMD_DECSACE:
- return screen_DECSACE(screen, seq);
- case TERM_CMD_DECSASD:
- return screen_DECSASD(screen, seq);
- case TERM_CMD_DECSC:
- return screen_DECSC(screen, seq);
- case TERM_CMD_DECSCA:
- return screen_DECSCA(screen, seq);
- case TERM_CMD_DECSCL:
- return screen_DECSCL(screen, seq);
- case TERM_CMD_DECSCP:
- return screen_DECSCP(screen, seq);
- case TERM_CMD_DECSCPP:
- return screen_DECSCPP(screen, seq);
- case TERM_CMD_DECSCS:
- return screen_DECSCS(screen, seq);
- case TERM_CMD_DECSCUSR:
- return screen_DECSCUSR(screen, seq);
- case TERM_CMD_DECSDDT:
- return screen_DECSDDT(screen, seq);
- case TERM_CMD_DECSDPT:
- return screen_DECSDPT(screen, seq);
- case TERM_CMD_DECSED:
- return screen_DECSED(screen, seq);
- case TERM_CMD_DECSEL:
- return screen_DECSEL(screen, seq);
- case TERM_CMD_DECSERA:
- return screen_DECSERA(screen, seq);
- case TERM_CMD_DECSFC:
- return screen_DECSFC(screen, seq);
- case TERM_CMD_DECSKCV:
- return screen_DECSKCV(screen, seq);
- case TERM_CMD_DECSLCK:
- return screen_DECSLCK(screen, seq);
- case TERM_CMD_DECSLE:
- return screen_DECSLE(screen, seq);
- case TERM_CMD_DECSLPP:
- return screen_DECSLPP(screen, seq);
- case TERM_CMD_DECSLRM_OR_SC:
- return screen_DECSLRM_OR_SC(screen, seq);
- case TERM_CMD_DECSMBV:
- return screen_DECSMBV(screen, seq);
- case TERM_CMD_DECSMKR:
- return screen_DECSMKR(screen, seq);
- case TERM_CMD_DECSNLS:
- return screen_DECSNLS(screen, seq);
- case TERM_CMD_DECSPP:
- return screen_DECSPP(screen, seq);
- case TERM_CMD_DECSPPCS:
- return screen_DECSPPCS(screen, seq);
- case TERM_CMD_DECSPRTT:
- return screen_DECSPRTT(screen, seq);
- case TERM_CMD_DECSR:
- return screen_DECSR(screen, seq);
- case TERM_CMD_DECSRFR:
- return screen_DECSRFR(screen, seq);
- case TERM_CMD_DECSSCLS:
- return screen_DECSSCLS(screen, seq);
- case TERM_CMD_DECSSDT:
- return screen_DECSSDT(screen, seq);
- case TERM_CMD_DECSSL:
- return screen_DECSSL(screen, seq);
- case TERM_CMD_DECST8C:
- return screen_DECST8C(screen, seq);
- case TERM_CMD_DECSTBM:
- return screen_DECSTBM(screen, seq);
- case TERM_CMD_DECSTR:
- return screen_DECSTR(screen, seq);
- case TERM_CMD_DECSTRL:
- return screen_DECSTRL(screen, seq);
- case TERM_CMD_DECSWBV:
- return screen_DECSWBV(screen, seq);
- case TERM_CMD_DECSWL:
- return screen_DECSWL(screen, seq);
- case TERM_CMD_DECTID:
- return screen_DECTID(screen, seq);
- case TERM_CMD_DECTME:
- return screen_DECTME(screen, seq);
- case TERM_CMD_DECTST:
- return screen_DECTST(screen, seq);
- case TERM_CMD_DL:
- return screen_DL(screen, seq);
- case TERM_CMD_DSR_ANSI:
- return screen_DSR_ANSI(screen, seq);
- case TERM_CMD_DSR_DEC:
- return screen_DSR_DEC(screen, seq);
- case TERM_CMD_ECH:
- return screen_ECH(screen, seq);
- case TERM_CMD_ED:
- return screen_ED(screen, seq);
- case TERM_CMD_EL:
- return screen_EL(screen, seq);
- case TERM_CMD_ENQ:
- return screen_ENQ(screen, seq);
- case TERM_CMD_EPA:
- return screen_EPA(screen, seq);
- case TERM_CMD_FF:
- return screen_FF(screen, seq);
- case TERM_CMD_HPA:
- return screen_HPA(screen, seq);
- case TERM_CMD_HPR:
- return screen_HPR(screen, seq);
- case TERM_CMD_HT:
- return screen_HT(screen, seq);
- case TERM_CMD_HTS:
- return screen_HTS(screen, seq);
- case TERM_CMD_HVP:
- return screen_HVP(screen, seq);
- case TERM_CMD_ICH:
- return screen_ICH(screen, seq);
- case TERM_CMD_IL:
- return screen_IL(screen, seq);
- case TERM_CMD_IND:
- return screen_IND(screen, seq);
- case TERM_CMD_LF:
- return screen_LF(screen, seq);
- case TERM_CMD_LS1R:
- return screen_LS1R(screen, seq);
- case TERM_CMD_LS2:
- return screen_LS2(screen, seq);
- case TERM_CMD_LS2R:
- return screen_LS2R(screen, seq);
- case TERM_CMD_LS3:
- return screen_LS3(screen, seq);
- case TERM_CMD_LS3R:
- return screen_LS3R(screen, seq);
- case TERM_CMD_MC_ANSI:
- return screen_MC_ANSI(screen, seq);
- case TERM_CMD_MC_DEC:
- return screen_MC_DEC(screen, seq);
- case TERM_CMD_NEL:
- return screen_NEL(screen, seq);
- case TERM_CMD_NP:
- return screen_NP(screen, seq);
- case TERM_CMD_NULL:
- return screen_NULL(screen, seq);
- case TERM_CMD_PP:
- return screen_PP(screen, seq);
- case TERM_CMD_PPA:
- return screen_PPA(screen, seq);
- case TERM_CMD_PPB:
- return screen_PPB(screen, seq);
- case TERM_CMD_PPR:
- return screen_PPR(screen, seq);
- case TERM_CMD_RC:
- return screen_RC(screen, seq);
- case TERM_CMD_REP:
- return screen_REP(screen, seq);
- case TERM_CMD_RI:
- return screen_RI(screen, seq);
- case TERM_CMD_RIS:
- return screen_RIS(screen, seq);
- case TERM_CMD_RM_ANSI:
- return screen_RM_ANSI(screen, seq);
- case TERM_CMD_RM_DEC:
- return screen_RM_DEC(screen, seq);
- case TERM_CMD_S7C1T:
- return screen_S7C1T(screen, seq);
- case TERM_CMD_S8C1T:
- return screen_S8C1T(screen, seq);
- case TERM_CMD_SCS:
- return screen_SCS(screen, seq);
- case TERM_CMD_SD:
- return screen_SD(screen, seq);
- case TERM_CMD_SGR:
- return screen_SGR(screen, seq);
- case TERM_CMD_SI:
- return screen_SI(screen, seq);
- case TERM_CMD_SM_ANSI:
- return screen_SM_ANSI(screen, seq);
- case TERM_CMD_SM_DEC:
- return screen_SM_DEC(screen, seq);
- case TERM_CMD_SO:
- return screen_SO(screen, seq);
- case TERM_CMD_SPA:
- return screen_SPA(screen, seq);
- case TERM_CMD_SS2:
- return screen_SS2(screen, seq);
- case TERM_CMD_SS3:
- return screen_SS3(screen, seq);
- case TERM_CMD_ST:
- return screen_ST(screen, seq);
- case TERM_CMD_SU:
- return screen_SU(screen, seq);
- case TERM_CMD_SUB:
- return screen_SUB(screen, seq);
- case TERM_CMD_TBC:
- return screen_TBC(screen, seq);
- case TERM_CMD_VPA:
- return screen_VPA(screen, seq);
- case TERM_CMD_VPR:
- return screen_VPR(screen, seq);
- case TERM_CMD_VT:
- return screen_VT(screen, seq);
- case TERM_CMD_XTERM_CLLHP:
- return screen_XTERM_CLLHP(screen, seq);
- case TERM_CMD_XTERM_IHMT:
- return screen_XTERM_IHMT(screen, seq);
- case TERM_CMD_XTERM_MLHP:
- return screen_XTERM_MLHP(screen, seq);
- case TERM_CMD_XTERM_MUHP:
- return screen_XTERM_MUHP(screen, seq);
- case TERM_CMD_XTERM_RPM:
- return screen_XTERM_RPM(screen, seq);
- case TERM_CMD_XTERM_RRV:
- return screen_XTERM_RRV(screen, seq);
- case TERM_CMD_XTERM_RTM:
- return screen_XTERM_RTM(screen, seq);
- case TERM_CMD_XTERM_SACL1:
- return screen_XTERM_SACL1(screen, seq);
- case TERM_CMD_XTERM_SACL2:
- return screen_XTERM_SACL2(screen, seq);
- case TERM_CMD_XTERM_SACL3:
- return screen_XTERM_SACL3(screen, seq);
- case TERM_CMD_XTERM_SDCS:
- return screen_XTERM_SDCS(screen, seq);
- case TERM_CMD_XTERM_SGFX:
- return screen_XTERM_SGFX(screen, seq);
- case TERM_CMD_XTERM_SPM:
- return screen_XTERM_SPM(screen, seq);
- case TERM_CMD_XTERM_SRV:
- return screen_XTERM_SRV(screen, seq);
- case TERM_CMD_XTERM_STM:
- return screen_XTERM_STM(screen, seq);
- case TERM_CMD_XTERM_SUCS:
- return screen_XTERM_SUCS(screen, seq);
- case TERM_CMD_XTERM_WM:
- return screen_XTERM_WM(screen, seq);
- }
-
- return 0;
-}
-
-unsigned int term_screen_get_width(term_screen *screen) {
- assert_return(screen, -EINVAL);
-
- return screen->page->width;
-}
-
-unsigned int term_screen_get_height(term_screen *screen) {
- assert_return(screen, -EINVAL);
-
- return screen->page->height;
-}
-
-uint64_t term_screen_get_age(term_screen *screen) {
- assert_return(screen, 0);
-
- return screen->age;
-}
-
-int term_screen_feed_text(term_screen *screen, const uint8_t *in, size_t size) {
- uint32_t *ucs4_str;
- size_t i, j, ucs4_len;
- const term_seq *seq;
- int r;
-
- assert_return(screen, -EINVAL);
-
- ++screen->age;
-
- /* Feed bytes into utf8 decoder and handle parsed ucs4 chars. We always
- * treat data as UTF-8, but the parser makes sure to fall back to raw
- * 8bit mode if the stream is not valid UTF-8. This should be more than
- * enough to support old 7bit/8bit modes. */
- for (i = 0; i < size; ++i) {
- ucs4_len = term_utf8_decode(&screen->utf8, &ucs4_str, in[i]);
- for (j = 0; j < ucs4_len; ++j) {
- r = term_parser_feed(screen->parser, &seq, ucs4_str[j]);
- if (r < 0) {
- return r;
- } else if (r != TERM_SEQ_NONE) {
- r = screen_feed_cmd(screen, seq);
- if (r < 0)
- return r;
- }
- }
- }
-
- return 0;
-}
-
-static char *screen_map_key(term_screen *screen,
- char *p,
- const uint32_t *keysyms,
- size_t n_syms,
- uint32_t ascii,
- const uint32_t *ucs4,
- unsigned int mods) {
- char ch, ch2, ch_mods;
- uint32_t v;
- size_t i;
-
- /* TODO: All these key-mappings need to be verified. Public information
- * on those mappings is pretty scarce and every emulator seems to do it
- * slightly differently.
- * A lot of mappings are also missing. */
-
- if (n_syms < 1)
- return p;
-
- if (n_syms == 1)
- v = keysyms[0];
- else
- v = XKB_KEY_NoSymbol;
-
- /* In some mappings, the modifiers are encoded as CSI parameters. The
- * encoding is rather arbitrary, but seems to work. */
- ch_mods = 0;
- switch (mods & (TERM_KBDMOD_SHIFT | TERM_KBDMOD_ALT | TERM_KBDMOD_CTRL)) {
- case TERM_KBDMOD_SHIFT:
- ch_mods = '2';
- break;
- case TERM_KBDMOD_ALT:
- ch_mods = '3';
- break;
- case TERM_KBDMOD_SHIFT | TERM_KBDMOD_ALT:
- ch_mods = '4';
- break;
- case TERM_KBDMOD_CTRL:
- ch_mods = '5';
- break;
- case TERM_KBDMOD_CTRL | TERM_KBDMOD_SHIFT:
- ch_mods = '6';
- break;
- case TERM_KBDMOD_CTRL | TERM_KBDMOD_ALT:
- ch_mods = '7';
- break;
- case TERM_KBDMOD_CTRL | TERM_KBDMOD_SHIFT | TERM_KBDMOD_ALT:
- ch_mods = '8';
- break;
- }
-
- /* A user might actually use multiple layouts for keyboard
- * input. @keysyms[0] contains the actual keysym that the user
- * used. But if this keysym is not in the ascii range, the
- * input handler does check all other layouts that the user
- * specified whether one of them maps the key to some ASCII
- * keysym and provides this via @ascii. We always use the real
- * keysym except when handling CTRL+<XY> shortcuts we use the
- * ascii keysym. This is for compatibility to xterm et. al. so
- * ctrl+c always works regardless of the currently active
- * keyboard layout. But if no ascii-sym is found, we still use
- * the real keysym. */
- if (ascii == XKB_KEY_NoSymbol)
- ascii = v;
-
- /* map CTRL+<ascii> */
- if (mods & TERM_KBDMOD_CTRL) {
- switch (ascii) {
- case 0x60 ... 0x7e:
- /* Right hand side is mapped to the left and then
- * treated equally. Fall through to left-hand side.. */
- ascii -= 0x20;
- case 0x20 ... 0x5f:
- /* Printable ASCII is mapped 1-1 in XKB and in
- * combination with CTRL bit 7 is flipped. This
- * is equivalent to the caret-notation. */
- *p++ = ascii ^ 0x40;
- return p;
- }
- }
-
- /* map cursor keys */
- ch = 0;
- switch (v) {
- case XKB_KEY_Up:
- ch = 'A';
- break;
- case XKB_KEY_Down:
- ch = 'B';
- break;
- case XKB_KEY_Right:
- ch = 'C';
- break;
- case XKB_KEY_Left:
- ch = 'D';
- break;
- case XKB_KEY_Home:
- ch = 'H';
- break;
- case XKB_KEY_End:
- ch = 'F';
- break;
- }
- if (ch) {
- *p++ = 0x1b;
- if (screen->flags & TERM_FLAG_CURSOR_KEYS)
- *p++ = 'O';
- else
- *p++ = '[';
- if (ch_mods) {
- *p++ = '1';
- *p++ = ';';
- *p++ = ch_mods;
- }
- *p++ = ch;
- return p;
- }
-
- /* map action keys */
- ch = 0;
- switch (v) {
- case XKB_KEY_Find:
- ch = '1';
- break;
- case XKB_KEY_Insert:
- ch = '2';
- break;
- case XKB_KEY_Delete:
- ch = '3';
- break;
- case XKB_KEY_Select:
- ch = '4';
- break;
- case XKB_KEY_Page_Up:
- ch = '5';
- break;
- case XKB_KEY_Page_Down:
- ch = '6';
- break;
- }
- if (ch) {
- *p++ = 0x1b;
- *p++ = '[';
- *p++ = ch;
- if (ch_mods) {
- *p++ = ';';
- *p++ = ch_mods;
- }
- *p++ = '~';
- return p;
- }
-
- /* map lower function keys */
- ch = 0;
- switch (v) {
- case XKB_KEY_F1:
- ch = 'P';
- break;
- case XKB_KEY_F2:
- ch = 'Q';
- break;
- case XKB_KEY_F3:
- ch = 'R';
- break;
- case XKB_KEY_F4:
- ch = 'S';
- break;
- }
- if (ch) {
- if (ch_mods) {
- *p++ = 0x1b;
- *p++ = '[';
- *p++ = '1';
- *p++ = ';';
- *p++ = ch_mods;
- *p++ = ch;
- } else {
- *p++ = 0x1b;
- *p++ = 'O';
- *p++ = ch;
- }
-
- return p;
- }
-
- /* map upper function keys */
- ch = 0;
- ch2 = 0;
- switch (v) {
- case XKB_KEY_F5:
- ch = '1';
- ch2 = '5';
- break;
- case XKB_KEY_F6:
- ch = '1';
- ch2 = '7';
- break;
- case XKB_KEY_F7:
- ch = '1';
- ch2 = '8';
- break;
- case XKB_KEY_F8:
- ch = '1';
- ch2 = '9';
- break;
- case XKB_KEY_F9:
- ch = '2';
- ch2 = '0';
- break;
- case XKB_KEY_F10:
- ch = '2';
- ch2 = '1';
- break;
- case XKB_KEY_F11:
- ch = '2';
- ch2 = '2';
- break;
- case XKB_KEY_F12:
- ch = '2';
- ch2 = '3';
- break;
- }
- if (ch) {
- *p++ = 0x1b;
- *p++ = '[';
- *p++ = ch;
- if (ch2)
- *p++ = ch2;
- if (ch_mods) {
- *p++ = ';';
- *p++ = ch_mods;
- }
- *p++ = '~';
- return p;
- }
-
- /* map special keys */
- switch (v) {
- case 0xff08: /* XKB_KEY_BackSpace */
- case 0xff09: /* XKB_KEY_Tab */
- case 0xff0a: /* XKB_KEY_Linefeed */
- case 0xff0b: /* XKB_KEY_Clear */
- case 0xff15: /* XKB_KEY_Sys_Req */
- case 0xff1b: /* XKB_KEY_Escape */
- case 0xffff: /* XKB_KEY_Delete */
- *p++ = v - 0xff00;
- return p;
- case 0xff13: /* XKB_KEY_Pause */
- /* TODO: What should we do with this key?
- * Sending XOFF is awful as there is no simple
- * way on modern keyboards to send XON again.
- * If someone wants this, we can re-eanble
- * optionally. */
- return p;
- case 0xff14: /* XKB_KEY_Scroll_Lock */
- /* TODO: What should we do on scroll-lock?
- * Sending 0x14 is what the specs say but it is
- * not used today the way most users would
- * expect so we disable it. If someone wants
- * this, we can re-enable it (optionally). */
- return p;
- case XKB_KEY_Return:
- *p++ = 0x0d;
- if (screen->flags & TERM_FLAG_NEWLINE_MODE)
- *p++ = 0x0a;
- return p;
- case XKB_KEY_ISO_Left_Tab:
- *p++ = 0x09;
- return p;
- }
-
- /* map unicode keys */
- for (i = 0; i < n_syms; ++i)
- p += utf8_encode_unichar(p, ucs4[i]);
-
- return p;
-}
-
-int term_screen_feed_keyboard(term_screen *screen,
- const uint32_t *keysyms,
- size_t n_syms,
- uint32_t ascii,
- const uint32_t *ucs4,
- unsigned int mods) {
- _cleanup_free_ char *dyn = NULL;
- static const size_t padding = 1;
- char buf[128], *start, *p;
-
- assert_return(screen, -EINVAL);
-
- /* allocate buffer if too small */
- start = buf;
- if (4 * n_syms + padding > sizeof(buf)) {
- dyn = malloc(4 * n_syms + padding);
- if (!dyn)
- return -ENOMEM;
-
- start = dyn;
- }
-
- /* reserve prefix space */
- start += padding;
- p = start;
-
- p = screen_map_key(screen, p, keysyms, n_syms, ascii, ucs4, mods);
- if (!p || p - start < 1)
- return 0;
-
- /* The ALT modifier causes ESC to be prepended to any key-stroke. We
- * already accounted for that buffer space above, so simply prepend it
- * here.
- * TODO: is altSendsEscape a suitable default? What are the semantics
- * exactly? Is it used in C0/C1 conversion? Is it prepended if there
- * already is an escape character? */
- if (mods & TERM_KBDMOD_ALT && *start != 0x1b)
- *--start = 0x1b;
-
- /* turn C0 into C1 */
- if (!(screen->flags & TERM_FLAG_7BIT_MODE) && p - start >= 2)
- if (start[0] == 0x1b && start[1] >= 0x40 && start[1] <= 0x5f)
- *++start ^= 0x40;
-
- return screen_write(screen, start, p - start);
-}
-
-int term_screen_resize(term_screen *screen, unsigned int x, unsigned int y) {
- unsigned int i;
- uint8_t *t;
- int r;
-
- assert_return(screen, -EINVAL);
-
- r = term_page_reserve(screen->page_main, x, y, &screen->state.attr, screen->age);
- if (r < 0)
- return r;
-
- r = term_page_reserve(screen->page_alt, x, y, &screen->state.attr, screen->age);
- if (r < 0)
- return r;
-
- if (x > screen->n_tabs) {
- t = realloc(screen->tabs, (x + 7) / 8);
- if (!t)
- return -ENOMEM;
-
- screen->tabs = t;
- screen->n_tabs = x;
- }
-
- for (i = (screen->page->width + 7) / 8 * 8; i < x; i += 8)
- screen->tabs[i / 8] = 0x1;
-
- term_page_resize(screen->page_main, x, y, &screen->state.attr, screen->age, screen->history);
- term_page_resize(screen->page_alt, x, y, &screen->state.attr, screen->age, NULL);
-
- screen->state.cursor_x = screen_clamp_x(screen, screen->state.cursor_x);
- screen->state.cursor_y = screen_clamp_x(screen, screen->state.cursor_y);
- screen_cursor_clear_wrap(screen);
-
- return 0;
-}
-
-void term_screen_soft_reset(term_screen *screen) {
- unsigned int i;
-
- assert(screen);
-
- screen->g0 = &term_unicode_lower;
- screen->g1 = &term_unicode_upper;
- screen->g2 = &term_unicode_lower;
- screen->g3 = &term_unicode_upper;
- screen->state.attr = screen->default_attr;
- screen->state.gl = &screen->g0;
- screen->state.gr = &screen->g1;
- screen->state.glt = NULL;
- screen->state.grt = NULL;
- screen->state.auto_wrap = 0;
- screen->state.origin_mode = 0;
-
- screen->saved = screen->state;
- screen->saved.cursor_x = 0;
- screen->saved.cursor_y = 0;
- screen->saved_alt = screen->saved;
-
- screen->page = screen->page_main;
- screen->history = screen->history_main;
- screen->flags = TERM_FLAG_7BIT_MODE;
- screen->conformance_level = TERM_CONFORMANCE_LEVEL_VT400;
-
- for (i = 0; i < screen->page->width; i += 8)
- screen->tabs[i / 8] = 0x1;
-
- term_page_set_scroll_region(screen->page_main, 0, screen->page->height);
- term_page_set_scroll_region(screen->page_alt, 0, screen->page->height);
-}
-
-void term_screen_hard_reset(term_screen *screen) {
- assert(screen);
-
- term_screen_soft_reset(screen);
- zero(screen->utf8);
- screen->state.cursor_x = 0;
- screen->state.cursor_y = 0;
- term_page_erase(screen->page_main, 0, 0, screen->page->width, screen->page->height, &screen->state.attr, screen->age, false);
- term_page_erase(screen->page_alt, 0, 0, screen->page->width, screen->page->height, &screen->state.attr, screen->age, false);
-}
-
-int term_screen_set_answerback(term_screen *screen, const char *answerback) {
- char *t = NULL;
-
- assert_return(screen, -EINVAL);
-
- if (answerback) {
- t = strdup(answerback);
- if (!t)
- return -ENOMEM;
- }
-
- free(screen->answerback);
- screen->answerback = t;
-
- return 0;
-}
-
-int term_screen_draw(term_screen *screen,
- int (*draw_fn) (term_screen *screen,
- void *userdata,
- unsigned int x,
- unsigned int y,
- const term_attr *attr,
- const uint32_t *ch,
- size_t n_ch,
- unsigned int ch_width),
- void *userdata,
- uint64_t *fb_age) {
- uint64_t cell_age, line_age, age = 0;
- term_charbuf_t ch_buf;
- const uint32_t *ch_str;
- unsigned int i, j, cw;
- term_page *page;
- term_line *line;
- term_cell *cell;
- size_t ch_n;
- int r;
-
- assert(screen);
- assert(draw_fn);
-
- if (fb_age)
- age = *fb_age;
-
- page = screen->page;
-
- for (j = 0; j < page->height; ++j) {
- line = page->lines[j];
- line_age = MAX(line->age, page->age);
-
- for (i = 0; i < page->width; ++i) {
- term_attr attr;
-
- cell = &line->cells[i];
- cell_age = MAX(cell->age, line_age);
-
- if (age != 0 && cell_age <= age)
- continue;
-
- ch_str = term_char_resolve(cell->ch, &ch_n, &ch_buf);
-
- /* Character-width of 0 is used for cleared cells.
- * Always treat this as single-cell character, so
- * renderers can assume ch_width is set properpy. */
- cw = MAX(cell->cwidth, 1U);
-
- attr = cell->attr;
- if (i == screen->state.cursor_x && j == screen->state.cursor_y &&
- !(screen->flags & TERM_FLAG_HIDE_CURSOR))
- attr.inverse ^= 1;
-
- r = draw_fn(screen,
- userdata,
- i,
- j,
- &attr,
- ch_str,
- ch_n,
- cw);
- if (r != 0)
- return r;
- }
- }
-
- if (fb_age)
- *fb_age = screen->age;
-
- return 0;
-}
~ianmdlvl / elogind.git / blobdiff