+++ /dev/null
-/*
- LICENSE INFORMATION:
- This program is free software; you can redistribute it and/or
- modify it under the terms of the GNU Lesser General Public
- License (LGPL) as published by the Free Software Foundation.
-
- Please refer to the COPYING file for more information.
-
- This program 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
- General Public License for more details.
-
- You should have received a copy of the GNU Lesser General Public
- License along with this program; if not, write to the Free Software
- Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
-
- Copyright © 2004 Bruno T. C. de Oliveira
- Copyright © 2006 Pierre Habouzit
- */
-
-#include <string.h>
-#include <stdio.h>
-
-#include "madtty.h"
-#include "roteprivate.h"
-#include "inject_csi.h"
-
-static void cursor_line_down(RoteTerm *rt) {
- int i;
- rt->crow++;
- rt->curpos_dirty = true;
- if (rt->crow <= rt->pd->scrollbottom) return;
-
- /* must scroll the scrolling region up by 1 line, and put cursor on
- * last line of it */
- rt->crow = rt->pd->scrollbottom;
-
- for (i = rt->pd->scrolltop; i < rt->pd->scrollbottom; i++) {
- rt->line_dirty[i] = true;
- memcpy(rt->cells[i], rt->cells[i+1], sizeof(RoteCell) * rt->cols);
- }
-
- rt->line_dirty[rt->pd->scrollbottom] = true;
-
- /* clear last row of the scrolling region */
- for (i = 0; i < rt->cols; i++) {
- rt->cells[rt->pd->scrollbottom][i].ch = 0x20;
- rt->cells[rt->pd->scrollbottom][i].attr = 0x70;
- }
-
-}
-
-static void cursor_line_up(RoteTerm *rt) {
- int i;
- rt->crow--;
- rt->curpos_dirty = true;
- if (rt->crow >= rt->pd->scrolltop) return;
-
- /* must scroll the scrolling region up by 1 line, and put cursor on
- * first line of it */
- rt->crow = rt->pd->scrolltop;
-
- for (i = rt->pd->scrollbottom; i > rt->pd->scrolltop; i--) {
- rt->line_dirty[i] = true;
- memcpy(rt->cells[i], rt->cells[i-1], sizeof(RoteCell) * rt->cols);
- }
-
- rt->line_dirty[rt->pd->scrolltop] = true;
-
- /* clear first row of the scrolling region */
- for (i = 0; i < rt->cols; i++) {
- rt->cells[rt->pd->scrolltop][i].ch = 0x20;
- rt->cells[rt->pd->scrolltop][i].attr = 0x70;
- }
-
-}
-
-static inline void put_normal_char(RoteTerm *rt, char c) {
- if (rt->ccol >= rt->cols) {
- rt->ccol = 0;
- cursor_line_down(rt);
- }
-
- if (rt->insert) {
- int i;
-
- for(i = rt->cols - 1; i >= rt->ccol+1; i--)
- rt->cells[rt->crow][i] = rt->cells[rt->crow][i-1];
- }
-
- rt->cells[rt->crow][rt->ccol].ch = c;
- rt->cells[rt->crow][rt->ccol].attr = rt->curattr;
- rt->ccol++;
-
- rt->line_dirty[rt->crow] = true;
- rt->curpos_dirty = true;
-}
-
-static inline void put_graphmode_char(RoteTerm *rt, char c) {
- char nc;
- /* do some very pitiful translation to regular ascii chars */
- switch (c) {
- case 'j': case 'k': case 'l': case 'm': case 'n': case 't':
- case 'u': case 'v': case 'w':
- nc = '+'; break;
- case 'x':
- nc = '|'; break;
- default:
- nc = '%';
- }
-
- put_normal_char(rt, nc);
-}
-
-static inline void new_escape_sequence(RoteTerm *rt) {
- rt->pd->escaped = true;
- rt->pd->esbuf_len = 0;
- rt->pd->esbuf[0] = '\0';
-}
-
-static inline void cancel_escape_sequence(RoteTerm *rt) {
- rt->pd->escaped = false;
- rt->pd->esbuf_len = 0;
- rt->pd->esbuf[0] = '\0';
-}
-
-static void handle_control_char(RoteTerm *rt, char c) {
- switch (c) {
- case '\r': rt->ccol = 0; break; /* carriage return */
- case '\n': /* line feed */
- rt->ccol = 0; cursor_line_down(rt);
- rt->curpos_dirty = true;
- break;
- case '\b': /* backspace */
- if (rt->ccol > 0) rt->ccol--;
- rt->curpos_dirty = true;
- break;
- case '\t': /* tab */
- rt->ccol += 8 - (rt->ccol % 8);
- clamp_cursor_to_bounds(rt);
- break;
- case '\x1B': /* begin escape sequence (aborting previous one if any) */
- new_escape_sequence(rt);
- break;
- case '\x0E': /* enter graphical character mode */
- rt->pd->graphmode = true;
- break;
- case '\x0F': /* exit graphical character mode */
- rt->pd->graphmode = false;
- break;
- case '\x9B': /* CSI character. Equivalent to ESC [ */
- new_escape_sequence(rt);
- rt->pd->esbuf[rt->pd->esbuf_len++] = '[';
- break;
- case '\x18': case '\x1A': /* these interrupt escape sequences */
- cancel_escape_sequence(rt);
- break;
- case '\a': /* bell */
- /* do nothing for now... maybe a visual bell would be nice? */
- break;
- #ifdef DEBUG
- default:
- fprintf(stderr, "Unrecognized control char: %d (^%c)\n", c, c + '@');
- break;
- #endif
- }
-}
-
-static inline bool is_valid_csi_ender(char c) {
- return (c >= 'a' && c <= 'z') ||
- (c >= 'A' && c <= 'Z') ||
- c == '@' || c == '`';
-}
-
-static void try_interpret_escape_seq(RoteTerm *rt) {
- char firstchar = rt->pd->esbuf[0];
- char lastchar = rt->pd->esbuf[rt->pd->esbuf_len-1];
-
- if (!firstchar) return; /* too early to do anything */
-
- if (rt->pd->handler) {
- /* call custom handler */
- #ifdef DEBUG
- fprintf(stderr, "Calling custom handler for ES <%s>.\n", rt->pd->esbuf);
- #endif
-
- int answer = (*(rt->pd->handler))(rt, rt->pd->esbuf);
- if (answer == ROTE_HANDLERESULT_OK) {
- /* successfully handled */
- #ifdef DEBUG
- fprintf(stderr, "Handler returned OK. Done with escape sequence.\n");
- #endif
-
- cancel_escape_sequence(rt);
- return;
- }
- else if (answer == ROTE_HANDLERESULT_NOTYET) {
- /* handler might handle it when more characters are appended to
- * it. So for now we don't interpret it */
- #ifdef DEBUG
- fprintf(stderr, "Handler returned NOTYET. Waiting for more chars.\n");
- #endif
-
- return;
- }
-
- /* If we got here then answer == ROTE_HANDLERESULT_NOWAY */
- /* handler said it can't handle that escape sequence,
- * but we can still try handling it ourselves, so
- * we proceed normally. */
- #ifdef DEBUG
- fprintf(stderr, "Handler returned NOWAY. Trying our handlers.\n");
- #endif
- }
-
- /* interpret ESC-M as reverse line-feed */
- if (firstchar == 'M') {
- cursor_line_up(rt);
- cancel_escape_sequence(rt);
- return;
- }
-
- if (firstchar != '[' && firstchar != ']') {
- /* unrecognized escape sequence. Let's forget about it. */
- #ifdef DEBUG
- fprintf(stderr, "Unrecognized ES: <%s>\n", rt->pd->esbuf);
- #endif
-
- cancel_escape_sequence(rt);
- return;
- }
-
- if (firstchar == '[' && is_valid_csi_ender(lastchar)) {
- /* we have a csi escape sequence: interpret it */
- rote_es_interpret_csi(rt);
- cancel_escape_sequence(rt);
- }
- else if (firstchar == ']' && lastchar == '\a') {
- /* we have an xterm escape sequence: interpret it */
-
- /* rote_es_interpret_xterm_es(rt); -- TODO!*/
- #ifdef DEBUG
- fprintf(stderr, "Ignored XTerm ES.\n");
- #endif
- cancel_escape_sequence(rt);
- }
-
- /* if the escape sequence took up all available space and could
- * not yet be parsed, abort it */
- if (rt->pd->esbuf_len + 1 >= ESEQ_BUF_SIZE) cancel_escape_sequence(rt);
-}
-
-void rote_vt_inject(RoteTerm *rt, const char *data, int len) {
- int i;
- for (i = 0; i < len; i++, data++) {
- if (*data == 0) continue; /* completely ignore NUL */
- if (*data >= 1 && *data <= 31) {
- handle_control_char(rt, *data);
- continue;
- }
-
- if (rt->pd->escaped && rt->pd->esbuf_len < ESEQ_BUF_SIZE) {
- /* append character to ongoing escape sequence */
- rt->pd->esbuf[rt->pd->esbuf_len] = *data;
- rt->pd->esbuf[++rt->pd->esbuf_len] = 0;
-
- try_interpret_escape_seq(rt);
- }
- else if (rt->pd->graphmode)
- put_graphmode_char(rt, *data);
- else
- put_normal_char(rt, *data);
- }
-}
-
projects / apps / madtty.git / blobdiff