--- /dev/null
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+That's all there is to it!
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+
--- /dev/null
+# Makefile for librote
+#
+# Copyright (c) 2004 Bruno T. C. de Oliveira
+#
+# LICENSE INFORMATION:
+# This program is free software; you can redistribute it and/or
+# modify it under the terms of the GNU General Public
+# License as published by the Free Software Foundation; either
+# version 2 of the License, or (at your option) any later version.
+#
+# 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 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 (c) 2002 Bruno T. C. de Oliveira
+
+SOURCES=$(wildcard *.c)
+HEADERS=$(wildcard *.h)
+
+OBJECTS=$(patsubst %.c,%.o,$(SOURCES))
+
+ROTE_VERSION=@PACKAGE_VERSION@
+ROTE_SONAME=librote.so.0
+
+CC=@CC@
+CFLAGS=@CFLAGS@ -Wall -fPIC
+LIBS=@LIBS@
+LDFLAGS=@LDFLAGS@
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+bindir=@bindir@
+
+all: librote.so.$(ROTE_VERSION)
+
+install: all
+ mkdir -p $(includedir)/rote
+ rm -f $(includedir)/rote/*.h
+ cp rote.h $(includedir)/rote
+ mkdir -p $(libdir)
+ cp librote.so.$(ROTE_VERSION) $(libdir)
+ cd $(libdir) && ln -sf librote.so.$(ROTE_VERSION) librote.so
+ cd $(libdir) && ln -sf librote.so.$(ROTE_VERSION) $(ROTE_SONAME)
+ chmod 755 rote-config
+ cp -p rote-config $(bindir)
+ @echo "-----------------------------------------------------------"
+ @echo "ROTE - Our Own Terminal Emulation Library v$(ROTE_VERSION)"
+ @echo
+ @echo "Include files installed at: $(includedir)"
+ @echo "Library files installed at: $(libdir)"
+ @echo "rote-config executable : $(bindir)/rote-config"
+ @echo
+ @echo "To find out what compiler arguments you should use to"
+ @echo "compile programs that use rote, use the rote-config"
+ @echo "program (make sure $(bindir) is in your path)."
+ @echo "-----------------------------------------------------------"
+
+librote.so.$(ROTE_VERSION): $(OBJECTS)
+ $(CC) $(CFLAGS) -shared -o $@ -Wl,-soname=$(ROTE_SONAME) $(OBJECTS) $(LDFLAGS) $(LIBS)
+
+.depends: $(SOURCES) $(HEADERS)
+ $(CC) $(CFLAGS) -MM $(SOURCES) >.depends
+
+-include .depends
+
+clean:
+ rm -f *.o .depends librote.so.*
+
+pristine: clean
+ rm -rf autom4te.cache configure config.status config.log Makefile rote-config
+
+.PHONY: clean all install pristine
+
--- /dev/null
+ROTE - OUR OWN TERMINAL EMULATION LIBRARY
+Copyright (c) 2004 Bruno T. C. de Oliveira
+Licensed under the GNU Lesser General Public License
+See the COPYING file for more details on the license terms.
+
+[[ AUTHOR AND PROJECT HOMEPAGE ]]
+This library was written by Bruno Takahashi C. de Oliveira, a
+Computer Science student at Universidade de São Paulo, Brazil.
+The project home page is:
+
+ http://rote.sourceforge.net
+
+[[ WHAT IS IT? ]]
+
+ROTE is a simple C library for VT102 terminal emulation. It allows the
+programmer to set up virtual 'screens' and send them data. The virtual
+screens will emulate the behavior of a VT102 terminal, interpreting
+escape sequences, control characters and such. The library supports
+ncurses as well so that you may render the virtual screen to the real
+screen when you need to.
+
+[[ MORE DETAILS ]]
+
+There are several programs that do terminal emulation, such as xterm, rxvt,
+screen and even the Linux console driver itself. However, it is not easy to
+isolate their terminal emulation logic and put it in a module that can be
+easily reused in other programs. That's where the ROTE library comes in.
+
+The goal of the ROTE library is to provide terminal emulation support
+for C/C++ applications, making it possible to write programs that display
+terminals in embedded windows within them, or even monitor the display
+produced by other programs.
+
+The ROTE library does not depend on any other library (except libc, of course),
+and ncurses support can be enabled or disabled at compile-time. With ncurses
+support compiled in, the ROTE library is able to render the virtual screens
+to the physical screen (actually any ncurses window) and can also translate
+ncurses key codes to the escape sequences the Linux console would have
+produced (and feed them into the terminal). Ncurses support is not mandatory
+however, and ROTE will work fine without it, but in that case the application
+must take care of drawing the terminal to the screen in whichever way it
+sees fit.
+
+ROTE also encapsulates the functionality needed to execute a child process
+using the virtual screen as the controlling terminal. It will handle the
+creation of the pseudo-terminal and the child process. All the application
+has to do is tell it the command to run in the terminal and call an update
+function at regular intervals to allow the terminal to update itself.
+
+
--- /dev/null
+dnl Process this file with autoconf to produce a configure script.
+
+AC_INIT([rote], 0.2.6)
+
+AC_SUBST(PACKAGE_NAME)
+AC_SUBST(PACKAGE_VERSION)
+
+AC_CONFIG_SRCDIR([rote.c])
+
+dnl Checks for programs.
+AC_PROG_CC
+
+dnl Checks for header files.
+AC_HEADER_STDC
+AC_HEADER_STDBOOL
+AC_CHECK_HEADERS([sys/types.h unistd.h stdlib.h string.h])
+
+dnl Check for libraries
+AC_CHECK_LIB([ncurses], [initscr], [],
+ AC_MSG_ERROR([Need ncurses to compile librote.]))
+AC_CHECK_LIB([util], [forkpty], [],
+ AC_MSG_ERROR([Need util library (forkpty function) to compile librote.]))
+
+dnl Checks for library functions
+AC_CHECK_FUNCS([memset select setenv])
+AC_FUNC_MALLOC
+AC_FUNC_SELECT_ARGTYPES
+
+dnl Checks for typedefs, structures, and compiler characteristics.
+AC_C_CONST
+AC_HEADER_TIME
+AC_C_INLINE
+AC_TYPE_PID_T
+AC_TYPE_SIGNAL
+
+AC_CONFIG_FILES([Makefile rote-config])
+AC_OUTPUT
+
--- /dev/null
+/* Just a simple example program that creates a terminal in a frame
+ * and lets the user interact with it.
+ *
+ * To compile:
+ * gcc -o boxshell boxshell.c $(rote-config --cflags --libs)
+ */
+
+#include <ncurses.h>
+#include <stdio.h>
+#include <rote/rote.h>
+#include <signal.h>
+
+static unsigned char getout = 0;
+void sigchld(int signo) { getout = 1; }
+int my_custom_handler(RoteTerm *rt, const char *es);
+
+int screen_w, screen_h;
+WINDOW *term_win;
+
+int main() {
+ RoteTerm *rt;
+ int i, j, ch;
+
+ signal(SIGCHLD, sigchld);
+
+ initscr();
+ noecho();
+ start_color();
+ raw();
+ nodelay(stdscr, TRUE); /* prevents getch() from blocking; rather
+ * it will return ERR when there is no
+ * keypress available */
+
+ keypad(stdscr, TRUE); /* necessary to use rote_vt_keypress */
+ getmaxyx(stdscr, screen_h, screen_w);
+
+ /* initialize the color pairs the way rote_vt_draw expects it. You might
+ * initialize them differently, but in that case you would need
+ * to supply a custom conversion function for rote_vt_draw to
+ * call when setting attributes. The idea of this "default" mapping
+ * is to map (fg,bg) to the color pair bg * 8 + 7 - fg. This way,
+ * the pair (white,black) ends up mapped to 0, which means that
+ * it does not need a color pair (since it is the default). Since
+ * there are only 63 available color pairs (and 64 possible fg/bg
+ * combinations), we really have to save 1 pair by assigning no pair
+ * to the combination white/black. */
+ for (i = 0; i < 8; i++) for (j = 0; j < 8; j++)
+ if (i != 7 || j != 0)
+ init_pair(j*8+7-i, i, j);
+
+ /* paint the screen blue */
+ attrset(COLOR_PAIR(32));
+ for (i = 0; i < screen_h; i++) for (j = 0; j < screen_w; j++) addch(' ');
+ refresh();
+
+ /* create a window with a frame */
+ term_win = newwin(22,72,1,4);
+ wattrset(term_win, COLOR_PAIR(7*8+7-0)); /* black over white */
+ wborder(term_win, 0, 0, 0, 0, 0, 0, 0, 0);
+ mvwprintw(term_win, 0, 27, " Term In a Box ");
+ wrefresh(term_win);
+
+ /* create the terminal and have it run bash */
+ rt = rote_vt_create(20, 70);
+ rote_vt_forkpty(rt, "/bin/bash --login");
+
+ /* add a sample custom escape sequence handler... say we want to handle
+ * the sequence, say, \e{N}, which will change the application's background
+ * color to N (where N is a number between 0 and 7). */
+ rote_vt_install_handler(rt, my_custom_handler);
+
+ /* keep reading keypresses from the user and passing them to the terminal;
+ * also, redraw the terminal to the window at each iteration */
+ ch = '\0';
+ while (!getout) {
+ rote_vt_draw(rt, term_win, 1, 1, NULL);
+ wrefresh(term_win);
+
+ ch = getch();
+ if (ch != ERR)
+ rote_vt_keypress(rt, ch); /* pass the keypress for handling */
+ }
+
+ endwin();
+ return 0;
+}
+
+
+int my_custom_handler(RoteTerm *rt, const char *es) {
+ int color;
+ int i, j;
+
+ /* if the escape sequence does not begin with '{', we give up */
+ if (*es != '{') return ROTE_HANDLERESULT_NOWAY;
+
+ /* ok, now we know it begins with '{'. Now, if it does not end with '}',
+ * it is not yet complete */
+ if (es[strlen(es)-1] != '}') return ROTE_HANDLERESULT_NOTYET;
+
+ /* ok, the sequence is complete */
+ color = atoi(es + 1);
+ if (color < 0 || color > 7) return false; /* don't recognize it */
+
+ /* paint the background with that color */
+ attrset(COLOR_PAIR(color * 8));
+ move(0, 0);
+ for (i = 0; i < screen_h; i++) for (j = 0; j < screen_w; j++) addch(' ');
+ touchwin(stdscr);
+ refresh();
+
+ /* touch term_win to force it to do a full redraw next time */
+ touchwin(term_win);
+
+ /* and redraw the terminal window */
+ wrefresh(term_win);
+
+ /* escape sequence was handled ok */
+ return ROTE_HANDLERESULT_OK;
+}
+
--- /dev/null
+#include "rote.h"
+#include "roteprivate.h"
+#include "inject_csi.h"
+#include <string.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) {
+ 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;
+
+ if (rt->ccol >= rt->cols) {
+ rt->ccol = 0;
+ cursor_line_down(rt);
+ }
+}
+
+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 */
+ while (rt->ccol % 8) put_normal_char(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);
+ }
+}
+
--- /dev/null
+#include "inject_csi.h"
+#include "roteprivate.h"
+#include <stdlib.h>
+#include <string.h>
+
+#define MAX_CSI_ES_PARAMS 32
+
+static inline void clamp_cursor_to_bounds(RoteTerm *rt) {
+ if (rt->crow < 0) rt->curpos_dirty = true, rt->crow = 0;
+ if (rt->ccol < 0) rt->curpos_dirty = true, rt->ccol = 0;
+
+ if (rt->crow >= rt->rows)
+ rt->curpos_dirty = true, rt->crow = rt->rows - 1;
+
+ if (rt->ccol >= rt->cols)
+ rt->curpos_dirty = true, rt->ccol = rt->cols - 1;
+}
+
+/* interprets a 'set attribute' (SGR) CSI escape sequence */
+static void interpret_csi_SGR(RoteTerm *rt, int param[], int pcount) {
+ int i;
+
+ if (pcount == 0) {
+ /* special case: reset attributes */
+ rt->curattr = 0x70;
+ return;
+ }
+
+ for (i = 0; i < pcount; i++) {
+ if (param[i] == 0) rt->curattr = 0x70;
+ else if (param[i] == 1 || param[i] == 2 || param[i] == 4) /* set bold */
+ rt->curattr |= 0x80;
+ else if (param[i] == 5) rt->curattr |= 0x08; /* set blink */
+ else if (param[i] == 7) rt->curattr = 0x07; /* reverse video */
+ else if (param[i] >= 30 && param[i] <= 37) /* set fg */
+ ROTE_ATTR_MOD_FG(rt->curattr, param[i] - 30);
+ else if (param[i] >= 40 && param[i] <= 47) /* set bg */
+ ROTE_ATTR_MOD_BG(rt->curattr, param[i] - 40);
+ else if (param[i] == 39) /* reset foreground to default */
+ ROTE_ATTR_MOD_FG(rt->curattr, 7);
+ else if (param[i] == 49) /* reset background to default */
+ ROTE_ATTR_MOD_BG(rt->curattr, 0);
+ }
+}
+
+/* interprets an 'erase display' (ED) escape sequence */
+static void interpret_csi_ED(RoteTerm *rt, int param[], int pcount) {
+ int r, c;
+ int start_row, start_col, end_row, end_col;
+
+ /* decide range */
+ if (pcount && param[0] == 2)
+ start_row = 0, start_col = 0, end_row = rt->rows - 1,
+ end_col = rt->cols - 1;
+
+ else if (pcount && param[0] == 1)
+ start_row = 0, start_col = 0, end_row = rt->crow,
+ end_col = rt->ccol;
+
+ else start_row = rt->crow, start_col = rt->ccol,
+ end_row = rt->rows - 1, end_col = rt->cols - 1;
+
+ /* clean range */
+ for (r = start_row; r <= end_row; r++) {
+ rt->line_dirty[r] = true;
+
+ for (c = (r == start_row ? start_col : 0);
+ c <= (r == end_row ? end_col : rt->cols - 1);
+ c++) {
+ rt->cells[r][c].ch = 0x20;
+ rt->cells[r][c].attr = rt->curattr;
+ }
+ }
+}
+
+/* interprets a 'move cursor' (CUP) escape sequence */
+static void interpret_csi_CUP(RoteTerm *rt, int param[], int pcount) {
+ if (pcount == 0) {
+ /* special case */
+ rt->crow = rt->ccol = 0;
+ return;
+ }
+ else if (pcount < 2) return; /* malformed */
+
+ rt->crow = param[0] - 1; /* convert from 1-based to 0-based */
+ rt->ccol = param[1] - 1; /* convert from 1-based to 0-based */
+
+ rt->curpos_dirty = true;
+
+ clamp_cursor_to_bounds(rt);
+}
+
+/* Interpret the 'relative mode' sequences: CUU, CUD, CUF, CUB, CNL,
+ * CPL, CHA, HPR, VPA, VPR, HPA */
+static void interpret_csi_C(RoteTerm *rt, char verb,
+ int param[], int pcount) {
+ int n = (pcount && param[0] > 0) ? param[0] : 1;
+
+ switch (verb) {
+ case 'A': rt->crow -= n; break;
+ case 'B': case 'e': rt->crow += n; break;
+ case 'C': case 'a': rt->ccol += n; break;
+ case 'D': rt->ccol -= n; break;
+ case 'E': rt->crow += n; rt->ccol = 0; break;
+ case 'F': rt->crow -= n; rt->ccol = 0; break;
+ case 'G': case '`': rt->ccol = param[0] - 1; break;
+ case 'd': rt->crow = param[0] - 1; break;
+ }
+
+ rt->curpos_dirty = true;
+ clamp_cursor_to_bounds(rt);
+}
+
+/* Interpret the 'erase line' escape sequence */
+static void interpret_csi_EL(RoteTerm *rt, int param[], int pcount) {
+ int erase_start, erase_end, i;
+ int cmd = pcount ? param[0] : 0;
+
+ switch (cmd) {
+ case 1: erase_start = 0; erase_end = rt->ccol; break;
+ case 2: erase_start = 0; erase_end = rt->cols - 1; break;
+ default: erase_start = rt->ccol; erase_end = rt->cols - 1; break;
+ }
+
+ for (i = erase_start; i <= erase_end; i++) {
+ rt->cells[rt->crow][i].ch = 0x20;
+ rt->cells[rt->crow][i].attr = rt->curattr;
+ }
+
+ rt->line_dirty[rt->crow] = true;
+}
+
+/* Interpret the 'insert blanks' sequence (ICH) */
+static void interpret_csi_ICH(RoteTerm *rt, int param[], int pcount) {
+ int n = (pcount && param[0] > 0) ? param[0] : 1;
+ int i;
+ for (i = rt->cols - 1; i >= rt->ccol + n; i--)
+ rt->cells[rt->crow][i] = rt->cells[rt->crow][i - n];
+ for (i = rt->ccol; i < rt->ccol + n; i++) {
+ rt->cells[rt->crow][i].ch = 0x20;
+ rt->cells[rt->crow][i].attr = rt->curattr;
+ }
+
+ rt->line_dirty[rt->crow] = true;
+}
+
+/* Interpret the 'delete chars' sequence (DCH) */
+static void interpret_csi_DCH(RoteTerm *rt, int param[], int pcount) {
+ int n = (pcount && param[0] > 0) ? param[0] : 1;
+ int i;
+ for (i = rt->ccol; i < rt->cols; i++) {
+ if (i + n < rt->cols)
+ rt->cells[rt->crow][i] = rt->cells[rt->crow][i + n];
+ else {
+ rt->cells[rt->crow][i].ch = 0x20;
+ rt->cells[rt->crow][i].attr = rt->curattr;
+ }
+ }
+
+ rt->line_dirty[rt->crow] = true;
+}
+
+/* Interpret an 'insert line' sequence (IL) */
+static void interpret_csi_IL(RoteTerm *rt, int param[], int pcount) {
+ int n = (pcount && param[0] > 0) ? param[0] : 1;
+ int i, j;
+
+ for (i = rt->pd->scrollbottom; i >= rt->crow + n; i--)
+ memcpy(rt->cells[i], rt->cells[i - n], sizeof(RoteCell) * rt->cols);
+
+ for (i = rt->crow; i < rt->crow + n && i <= rt->pd->scrollbottom; i++) {
+ rt->line_dirty[i] = true;
+ for (j = 0; j < rt->cols; j++)
+ rt->cells[i][j].ch = 0x20, rt->cells[i][j].attr = rt->curattr;
+ }
+
+}
+
+/* Interpret a 'delete line' sequence (DL) */
+static void interpret_csi_DL(RoteTerm *rt, int param[], int pcount) {
+ int n = (pcount && param[0] > 0) ? param[0] : 1;
+ int i, j;
+
+ for (i = rt->crow; i <= rt->pd->scrollbottom; i++) {
+ rt->line_dirty[i] = true;
+ if (i + n <= rt->pd->scrollbottom)
+ memcpy(rt->cells[i], rt->cells[i+n], sizeof(RoteCell) * rt->cols);
+ else {
+ for (j = 0; j < rt->cols; j++)
+ rt->cells[i][j].ch = 0x20, rt->cells[i][j].attr = rt->curattr;
+ }
+ }
+}
+
+/* Interpret an 'erase characters' (ECH) sequence */
+static void interpret_csi_ECH(RoteTerm *rt, int param[], int pcount) {
+ int n = (pcount && param[0] > 0) ? param[0] : 1;
+ int i;
+
+ for (i = rt->ccol; i < rt->ccol + n && i < rt->cols; i++) {
+ rt->cells[rt->crow][i].ch = 0x20;
+ rt->cells[rt->crow][i].attr = rt->curattr;
+ }
+
+ rt->line_dirty[rt->crow] = true;
+}
+
+/* Interpret a 'set scrolling region' (DECSTBM) sequence */
+static void interpret_csi_DECSTBM(RoteTerm *rt, int param[], int pcount) {
+ int newtop, newbottom;
+
+ if (!pcount) {
+ newtop = 0;
+ newbottom = rt->rows - 1;
+ }
+ else if (pcount < 2) return; /* malformed */
+ else {
+ newtop = param[0] - 1;
+ newbottom = param[1] - 1;
+ }
+
+ /* clamp to bounds */
+ if (newtop < 0) newtop = 0;
+ if (newtop >= rt->rows) newtop = rt->rows - 1;
+ if (newbottom < 0) newbottom = 0;
+ if (newbottom >= rt->rows) newbottom = rt->rows - 1;
+
+ /* check for range validity */
+ if (newtop > newbottom) return;
+ rt->pd->scrolltop = newtop;
+ rt->pd->scrollbottom = newbottom;
+}
+
+static void interpret_csi_SAVECUR(RoteTerm *rt, int param[], int pcount) {
+ rt->pd->saved_x = rt->ccol;
+ rt->pd->saved_y = rt->crow;
+}
+
+static void interpret_csi_RESTORECUR(RoteTerm *rt, int param[], int pcount) {
+ rt->ccol = rt->pd->saved_x;
+ rt->crow = rt->pd->saved_y;
+ rt->curpos_dirty = true;
+}
+
+void rote_es_interpret_csi(RoteTerm *rt) {
+ static int csiparam[MAX_CSI_ES_PARAMS];
+ int param_count = 0;
+ const char *p = rt->pd->esbuf + 1;
+ char verb = rt->pd->esbuf[rt->pd->esbuf_len - 1];
+
+ if (!strncmp(rt->pd->esbuf, "[?", 2)) { /* private-mode CSI, ignore */
+ #ifdef DEBUG
+ fprintf(stderr, "Ignoring private-mode CSI: <%s>\n", rt->pd->esbuf);
+ #endif
+ return;
+ }
+
+ /* parse numeric parameters */
+ while ((*p >= '0' && *p <= '9') || *p == ';') {
+ if (*p == ';') {
+ if (param_count >= MAX_CSI_ES_PARAMS) return; /* too long! */
+ csiparam[param_count++] = 0;
+ }
+ else {
+ if (param_count == 0) csiparam[param_count++] = 0;
+ csiparam[param_count - 1] *= 10;
+ csiparam[param_count - 1] += *p - '0';
+ }
+
+ p++;
+ }
+
+ /* delegate handling depending on command character (verb) */
+ switch (verb) {
+ case 'm': /* it's a 'set attribute' sequence */
+ interpret_csi_SGR(rt, csiparam, param_count); break;
+ case 'J': /* it's an 'erase display' sequence */
+ interpret_csi_ED(rt, csiparam, param_count); break;
+ case 'H': case 'f': /* it's a 'move cursor' sequence */
+ interpret_csi_CUP(rt, csiparam, param_count); break;
+ case 'A': case 'B': case 'C': case 'D': case 'E': case 'F': case 'G':
+ case 'e': case 'a': case 'd': case '`':
+ /* it is a 'relative move' */
+ interpret_csi_C(rt, verb, csiparam, param_count); break;
+ case 'K': /* erase line */
+ interpret_csi_EL(rt, csiparam, param_count); break;
+ case '@': /* insert characters */
+ interpret_csi_ICH(rt, csiparam, param_count); break;
+ case 'P': /* delete characters */
+ interpret_csi_DCH(rt, csiparam, param_count); break;
+ case 'L': /* insert lines */
+ interpret_csi_IL(rt, csiparam, param_count); break;
+ case 'M': /* delete lines */
+ interpret_csi_DL(rt, csiparam, param_count); break;
+ case 'X': /* erase chars */
+ interpret_csi_ECH(rt, csiparam, param_count); break;
+ case 'r': /* set scrolling region */
+ interpret_csi_DECSTBM(rt, csiparam, param_count); break;
+ case 's': /* save cursor location */
+ interpret_csi_SAVECUR(rt, csiparam, param_count); break;
+ case 'u': /* restore cursor location */
+ interpret_csi_RESTORECUR(rt, csiparam, param_count); break;
+ #ifdef DEBUG
+ default:
+ fprintf(stderr, "Unrecogized CSI: <%s>\n", rt->pd->esbuf); break;
+ #endif
+ }
+}
+
--- /dev/null
+#ifndef btco_ROTE_inject_csi_h
+#define btco_ROTE_inject_csi_h
+
+#include "rote.h"
+
+/* Interprets a CSI escape sequence stored in rt->pd->esbuf,
+ * changing rt to reflect the effect of the sequence. This function
+ * will not change rt->pd->esbuf, rt->pd->escaped or other escape-sequence
+ * related fields in it */
+void rote_es_interpret_csi(RoteTerm *rt);
+
+#endif
+
--- /dev/null
+#!/bin/sh
+
+prefix=@prefix@
+exec_prefix=@exec_prefix@
+libdir=@libdir@
+includedir=@includedir@
+version=@PACKAGE_VERSION@
+
+if test $# -eq 0; then
+ echo "Usage: rote-config [--cflags] [--libs]"
+ echo " rote-config --version"
+ echo
+fi
+
+while test $# -gt 0; do
+ case $1 in
+ --cflags)
+ echo "-I$includedir"
+ ;;
+ --libs)
+ echo "-L$libdir -lrote"
+ ;;
+ --version)
+ echo "ROTE version $version"
+ echo "Our Own Terminal Emulation Library"
+ echo
+ echo "Copyright (c) 2004 Bruno T. C. de Oliveira"
+ echo "All rights reserved"
+ ;;
+ esac
+ shift
+done
+
--- /dev/null
+#include "rote.h"
+#include "roteprivate.h"
+#include <stdlib.h>
+#include <pty.h>
+#include <stdio.h>
+#include <string.h>
+
+RoteTerm *rote_vt_create(int rows, int cols) {
+ RoteTerm *rt;
+ int i, j;
+
+ if (rows <= 0 || cols <= 0) return NULL;
+
+ if (! (rt = (RoteTerm*) malloc(sizeof(RoteTerm))) ) return NULL;
+ memset(rt, 0, sizeof(RoteTerm));
+
+ /* record dimensions */
+ rt->rows = rows;
+ rt->cols = cols;
+
+ /* create the cell matrix */
+ rt->cells = (RoteCell**) malloc(sizeof(RoteCell*) * rt->rows);
+ for (i = 0; i < rt->rows; i++) {
+ /* create row */
+ rt->cells[i] = (RoteCell*) malloc(sizeof(RoteCell) * rt->cols);
+
+ /* fill row with spaces */
+ for (j = 0; j < rt->cols; j++) {
+ rt->cells[i][j].ch = 0x20; /* a space */
+ rt->cells[i][j].attr = 0x70; /* white text, black background */
+ }
+ }
+
+ /* allocate dirtiness array */
+ rt->line_dirty = (bool*) malloc(sizeof(bool) * rt->rows);
+
+ /* initialization of other public fields */
+ rt->crow = rt->ccol = 0;
+ rt->curattr = 0x70; /* white text over black background */
+
+ /* allocate private data */
+ rt->pd = (RoteTermPrivate*) malloc(sizeof(RoteTermPrivate));
+ memset(rt->pd, 0, sizeof(RoteTermPrivate));
+
+ rt->pd->pty = -1; /* no pty for now */
+
+ /* initial scrolling area is the whole window */
+ rt->pd->scrolltop = 0;
+ rt->pd->scrollbottom = rt->rows - 1;
+
+ #ifdef DEBUG
+ fprintf(stderr, "Created a %d x %d terminal.\n", rt->rows, rt->cols);
+ #endif
+
+ return rt;
+}
+
+void rote_vt_destroy(RoteTerm *rt) {
+ int i;
+ if (!rt) return;
+
+ free(rt->pd);
+ free(rt->line_dirty);
+ for (i = 0; i < rt->rows; i++) free(rt->cells[i]);
+ free(rt->cells);
+ free(rt);
+}
+
+static void default_cur_set_attr(WINDOW *win, unsigned char attr) {
+ int cp = ROTE_ATTR_BG(attr) * 8 + 7 - ROTE_ATTR_FG(attr);
+ if (!cp) wattrset(win, A_NORMAL);
+ else wattrset(win, COLOR_PAIR(cp));
+
+ if (ROTE_ATTR_BOLD(attr)) wattron(win, A_BOLD);
+ if (ROTE_ATTR_BLINK(attr)) wattron(win, A_BLINK);
+}
+
+static inline unsigned char ensure_printable(unsigned char ch)
+ { return ch >= 32 ? ch : 32; }
+
+void rote_vt_draw(RoteTerm *rt, WINDOW *win, int srow, int scol,
+ void (*cur_set_attr)(WINDOW*,unsigned char)) {
+
+ int i, j;
+ rote_vt_update(rt);
+
+ if (!cur_set_attr) cur_set_attr = default_cur_set_attr;
+ for (i = 0; i < rt->rows; i++) {
+ wmove(win, srow + i, scol);
+ for (j = 0; j < rt->cols; j++) {
+ (*cur_set_attr)(win, rt->cells[i][j].attr);
+ waddch(win, ensure_printable(rt->cells[i][j].ch));
+ }
+ }
+
+ wmove(win, srow + rt->crow, scol + rt->ccol);
+}
+
+pid_t rote_vt_forkpty(RoteTerm *rt, const char *command) {
+ struct winsize ws;
+ pid_t childpid;
+
+ ws.ws_row = rt->rows;
+ ws.ws_col = rt->cols;
+ ws.ws_xpixel = ws.ws_ypixel = 0;
+
+ childpid = forkpty(&rt->pd->pty, NULL, NULL, &ws);
+ if (childpid < 0) return -1;
+
+ if (childpid == 0) {
+ /* we are the child, running under the slave side of the pty. */
+
+ /* Cajole application into using linux-console-compatible escape
+ * sequences (which is what we are prepared to interpret) */
+ setenv("TERM", "linux", 1);
+
+ /* Now we will exec /bin/sh -c command. */
+ execl("/bin/sh", "/bin/sh", "-c", command, NULL);
+
+ fprintf(stderr, "\nexecl() failed.\nCommand: '%s'\n", command);
+ exit(127); /* error exec'ing */
+ }
+
+ /* if we got here we are the parent process */
+ rt->childpid = childpid;
+ return childpid;
+}
+
+void rote_vt_forsake_child(RoteTerm *rt) {
+ if (rt->pd->pty >= 0) close(rt->pd->pty);
+ rt->pd->pty = -1;
+ rt->childpid = 0;
+}
+
+void rote_vt_update(RoteTerm *rt) {
+ fd_set ifs;
+ struct timeval tvzero;
+ char buf[512];
+ int bytesread;
+ if (rt->pd->pty < 0) return; /* nothing to pump */
+
+ while (1) {
+ /* check if pty has something to say */
+ FD_ZERO(&ifs); FD_SET(rt->pd->pty, &ifs);
+ tvzero.tv_sec = 0; tvzero.tv_usec = 0;
+
+ if (select(rt->pd->pty + 1, &ifs, NULL, NULL, &tvzero) <= 0)
+ return; /* nothing to read, or select() failed */
+
+ /* read what we can. This is guaranteed not to block, since
+ * select() told us there was something to read. */
+ bytesread = read(rt->pd->pty, buf, 512);
+ if (bytesread <= 0) return;
+
+ /* inject the data into the terminal */
+ rote_vt_inject(rt, buf, bytesread);
+ }
+}
+
+void rote_vt_write(RoteTerm *rt, const char *data, int len) {
+ if (rt->pd->pty < 0) {
+ /* no pty, so just inject the data plain and simple */
+ rote_vt_inject(rt, data, len);
+ return;
+ }
+
+ /* write data to pty. Keep calling write() until we have written
+ * everything. */
+ while (len > 0) {
+ int byteswritten = write(rt->pd->pty, data, len);
+ if (byteswritten < 0) {
+ /* very ugly way to inform the error. Improvements welcome! */
+ static char errormsg[] = "\n(ROTE: pty write() error)\n";
+ rote_vt_inject(rt, errormsg, strlen(errormsg));
+ return;
+ }
+
+ data += byteswritten;
+ len -= byteswritten;
+ }
+}
+
+void rote_vt_install_handler(RoteTerm *rt, rote_es_handler_t handler) {
+ rt->pd->handler = handler;
+}
+
+void *rote_vt_take_snapshot(RoteTerm *rt) {
+ int i;
+ int bytes_per_row = sizeof(RoteCell) * rt->cols;
+ void *buf = malloc(bytes_per_row * rt->rows);
+ void *ptr = buf;
+
+ for (i = 0; i < rt->rows; i++, ptr += bytes_per_row)
+ memcpy(ptr, rt->cells[i], bytes_per_row);
+
+ return buf;
+}
+
+void rote_vt_restore_snapshot(RoteTerm *rt, void *snapbuf) {
+ int i;
+ int bytes_per_row = sizeof(RoteCell) * rt->cols;
+
+ for (i = 0; i < rt->rows; i++, snapbuf += bytes_per_row) {
+ rt->line_dirty[i] = true;
+ memcpy(rt->cells[i], snapbuf, bytes_per_row);
+ }
+}
+
+
--- /dev/null
+/* ROTE - Our Own Terminal Emulation library
+ * Copyright (c) 2004 Bruno T. C. de Oliveira
+ * All rights reserved
+ *
+ * 2004-08-25
+ */
+
+#ifndef btco_ROTE_rote_h
+#define btco_ROTE_rote_h
+
+#include <ncurses.h>
+#include <sys/types.h>
+#include <unistd.h>
+#include <stdlib.h>
+
+/* Color codes: 0 = black, 1 = red, 2 = green, 3 = yellow, 4 = blue,
+ * 5 = magenta, 6 = cyan, 7 = white.
+ *
+ * An 'attribute' as used in this library means an 8-bit value that conveys
+ * a foreground color code, a background color code, and the bold
+ * and blink bits. Each cell in the virtual terminal screen is associated
+ * with an attribute that specifies its appearance. The bits of an attribute,
+ * from most significant to least significant, are
+ *
+ * bit: 7 6 5 4 3 2 1 0
+ * content: S F F F H B B B
+ * | `-,-' | `-,-'
+ * | | | |
+ * | | | `----- 3-bit background color code (0 - 7)
+ * | | `--------- blink bit (if on, text is blinking)
+ * | `------------- 3-bit foreground color code (0 - 7)
+ * `----------------- bold bit
+ *
+ * It is however recommended that you use the provided macros rather
+ * than dealing with this format directly.
+ *
+ * Sometimes we will call the 'SFFF' nibble above the 'extended
+ * foreground color code', and the 'HBBB' nibble the 'extended background
+ * color code'. So the extended color codes are just the regular
+ * color codes except that they have an additional bit (the most significant
+ * bit) indicating bold/blink.
+ */
+
+/* retrieve attribute fields */
+#define ROTE_ATTR_BG(attr) ((attr) & 0x07)
+#define ROTE_ATTR_FG(attr) (((attr) & 0x70) >> 4)
+
+/* retrieve 'extended' color codes (see above for info) */
+#define ROTE_ATTR_XBG(attr) ((attr) & 0x0F)
+#define ROTE_ATTR_XFG(attr) (((attr) & 0xF0) >> 4)
+
+/* set attribute fields. This requires attr to be an lvalue, and it will
+ * be evaluated more than once. Use with care. */
+#define ROTE_ATTR_MOD_BG(attr, newbg) attr &= 0xF8, attr |= (newbg)
+#define ROTE_ATTR_MOD_FG(attr, newfg) attr &= 0x8F, attr |= ((newfg) << 4)
+#define ROTE_ATTR_MOD_XBG(attr, newxbg) attr &= 0xF0, attr |= (newxbg)
+#define ROTE_ATTR_MOD_XFG(attr, newxfg) attr &= 0x0F, attr |= ((newxfg) << 4)
+#define ROTE_ATTR_MOD_BOLD(attr, boldbit) \
+ attr &= 0x7F, attr |= (boldbit)?0x80:0x00
+#define ROTE_ATTR_MOD_BLINK(attr, blinkbit) \
+ attr &= 0xF7, attr |= (boldbit)?0x08:0x00
+
+/* these return non-zero for 'yes', zero for 'no'. Don't rely on them being
+ * any more specific than that (e.g. being exactly 1 for 'yes' or whatever). */
+#define ROTE_ATTR_BOLD(attr) ((attr) & 0x80)
+#define ROTE_ATTR_BLINK(attr) ((attr) & 0x08)
+
+/* Represents each of the text cells in the terminal screen */
+typedef struct RoteCell_ {
+ unsigned char ch; /* >= 32, that is, control characters are not
+ * allowed to be on the virtual screen */
+
+ unsigned char attr; /* a color attribute, as described previously */
+} RoteCell;
+
+/* Declaration of opaque rote_Term_Private structure */
+typedef struct RoteTermPrivate_ RoteTermPrivate;
+
+/* Represents a virtual terminal. You may directly access the fields
+ * of this structure, but please pay close attention to the fields
+ * marked read-only or with special usage notes. */
+typedef struct RoteTerm_ {
+ int rows, cols; /* terminal dimensions, READ-ONLY. You
+ * can't resize the terminal by changing
+ * this (a segfault is about all you will
+ * accomplish). */
+
+ RoteCell **cells; /* matrix of cells. This
+ * matrix is indexed as cell[row][column]
+ * where 0 <= row < rows and
+ * 0 <= col < cols
+ *
+ * You may freely modify the contents of
+ * the cells.
+ */
+
+ int crow, ccol; /* cursor coordinates. READ-ONLY. */
+
+ unsigned char curattr; /* current attribute, that is the attribute
+ * that will be used for newly inserted
+ * characters */
+
+ pid_t childpid; /* pid of the child process running in the
+ * terminal; 0 for none. This is READ-ONLY. */
+
+ RoteTermPrivate *pd; /* private state data */
+
+ /* --- dirtiness flags: the following flags will be raised when the
+ * corresponding items are modified. They can only be unset by YOU
+ * (when, for example, you redraw the term or something) --- */
+ bool curpos_dirty; /* whether cursor location has changed */
+ bool *line_dirty; /* whether each row is dirty */
+ /* --- end dirtiness flags */
+} RoteTerm;
+
+/* Creates a new virtual terminal with the given dimensions. You
+ * must destroy it with rote_vt_destroy after you are done with it.
+ * The terminal will be initially blank and the cursor will
+ * be at the top-left corner.
+ *
+ * Returns NULL on error.
+ */
+RoteTerm *rote_vt_create(int rows, int cols);
+
+/* Destroys a virtual terminal previously created with
+ * rote_vt_create. If rt == NULL, does nothing. */
+void rote_vt_destroy(RoteTerm *rt);
+
+/* Starts a forked process in the terminal. The <command> parameter
+ * is a shell command to execute (it will be interpreted by '/bin/sh -c')
+ * Returns the pid of the forked process.
+ *
+ * Some useful reminders: If you want to be notified when child processes exit,
+ * you should handle the SIGCHLD signal. If, on the other hand, you want to
+ * ignore exitting child processes, you should set the SIGCHLD handler to
+ * SIG_IGN to prevent child processes from hanging around the system as 'zombie
+ * processes'.
+ *
+ * Continuing to write to a RoteTerm whose child process has died does not
+ * accomplish a lot, but is not an error and should not cause your program
+ * to crash or block indefinitely or anything of that sort :-)
+ * If, however, you want to be tidy and inform the RoteTerm that its
+ * child has died, call rote_vt_forsake_child when appropriate.
+ *
+ * If there is an error, returns -1. Notice that passing an invalid
+ * command will not cause an error at this level: the shell will try
+ * to execute the command and will exit with status 127. You can catch
+ * that by installing a SIGCHLD handler if you want.
+ */
+pid_t rote_vt_forkpty(RoteTerm *rt, const char *command);
+
+/* Disconnects the RoteTerm from its forked child process. This function
+ * should be called when the child process dies or something of the sort.
+ * It is not strictly necessary to call this function, but it is
+ * certainly tidy. */
+void rote_vt_forsake_child(RoteTerm *rt);
+
+/* Does some data plumbing, that is, sees if the sub process has
+ * something to write to the terminal, and if so, write it. If you
+ * called rote_vt_fork to start a forked process, you must call
+ * this function regularly to update the terminal.
+ *
+ * This function will not block, that is, if there is no data to be
+ * read from the child process it will return immediately. */
+void rote_vt_update(RoteTerm *rt);
+
+/* Puts data into the terminal: if there is a forked process running,
+ * the data will be sent to it. If there is no forked process,
+ * the data will simply be injected into the terminal (as in
+ * rote_vt_inject) */
+void rote_vt_write(RoteTerm *rt, const char *data, int length);
+
+/* Inject data into the terminal. <data> needs NOT be 0-terminated:
+ * its length is solely determined by the <length> parameter. Please
+ * notice that this writes directly to the terminal, that is,
+ * this function does NOT send the data to the forked process
+ * running in the terminal (if any). For that, you might want
+ * to use rote_vt_write.
+ */
+void rote_vt_inject(RoteTerm *rt, const char *data, int length);
+
+/* Paints the virtual terminal screen on the given window, putting
+ * the top-left corner at the given position. The cur_set_attr
+ * function must set the curses attributes given a Rote attribute
+ * byte. It should, for example, do wattrset(win, COLOR_PAIR(n)) where
+ * n is the colorpair appropriate for the attribute and such.
+ *
+ * If you pass NULL for cur_set_attr, the default implementation will
+ * set the color pair given by (bg * 8 + 7 - fg), which seems to be
+ * a common mapping, and the bold and blink attributes will be mapped
+ * to A_BOLD and A_BLINK.
+ *
+ * At the end of the function, the cursor will be left where the virtual
+ * cursor of the terminal is supposed to be.
+ *
+ * This function does not call wrefresh(win); you have to do that yourself.
+ * This function automatically calls rote_vt_update prior to drawing
+ * so that the drawn contents are accurate.
+ */
+void rote_vt_draw(RoteTerm *rt, WINDOW *win, int startrow, int startcol,
+ void (*cur_set_attr)(WINDOW *win, unsigned char attr));
+
+/* Indicates to the terminal that the given key has been pressed.
+ * This will cause the terminal to rote_vt_write() the appropriate
+ * escape sequence for that key (that is, the escape sequence
+ * that the linux text-mode console would produce for it). The argument,
+ * keycode, must be a CURSES EXTENDED KEYCODE, the ones you get
+ * when you use keypad(somewin, TRUE) (see man page). */
+void rote_vt_keypress(RoteTerm *rt, int keycode);
+
+/* Takes a snapshot of the current contents of the terminal and
+ * saves them to a dynamically allocated buffer. Returns a pointer
+ * to the newly created buffer, which you can pass to
+ * rote_vt_restore_snapshot. Caller is responsible for free()'ing when
+ * the snapshot is no longer needed. */
+void *rote_vt_take_snapshot(RoteTerm *rt);
+
+/* Restores a snapshot previously taken with rote_vt_take_snapshot.
+ * This function does NOT free() the passed buffer */
+void rote_vt_restore_snapshot(RoteTerm *rt, void *snapbuf);
+
+/* Declaration of custom escape sequence callback type. See the
+ * rote_vt_add_es_handler function for more info */
+typedef int (*rote_es_handler_t)(RoteTerm *rt, const char *es);
+
+/* Installs a custom escape sequence handler for the given RoteTerm.
+ * The handler will be called by the library every time it tries to
+ * recognize an escape sequence; depending on the return value of the
+ * handler, it will proceed in a different manner. See the description
+ * of the possible return values (ROTE_HANDLERESULT_* constants) below
+ * for more info.
+ *
+ * This handler will be called EACH TIME THE ESCAPE SEQUENCE BUFFER
+ * RECEIVES A CHARACTER. Therefore, it must execute speedily in order
+ * not to create too heavy a performance penalty. In particular, the
+ * writer of the handler should take care to quickly test for invalid
+ * or incomplete escape sequences before trying to do more elaborate
+ * parsing.
+ *
+ * The handler will NOT be called with an empty escape sequence (i.e.
+ * one in which only the initial ESC was received).
+ *
+ * The custom handler receives the terminal it pertains to and the
+ * escape sequence as a string (without the initial escape character).
+ *
+ * The handler may of course modify the terminal as it sees fit, taking
+ * care not to corrupt it of course (in particular, it should appropriately
+ * raise the line_dirty[] and curpos_dirty flags to indicate what it has
+ * changed).
+ */
+void rote_vt_install_handler(RoteTerm *rt, rote_es_handler_t handler);
+
+/* Possible return values for the custom handler function and their
+ * meanings: */
+#define ROTE_HANDLERESULT_OK 0 /* means escape sequence was handled */
+
+#define ROTE_HANDLERESULT_NOTYET 1 /* means the escape sequence was not
+ * recognized yet, but there is hope that
+ * it still will once more characters
+ * arrive (i.e. it is not yet complete).
+ *
+ * The library will thus continue collecting
+ * characters and calling the handler as
+ * each character arrives until
+ * either OK or NOWAY is returned.
+ */
+
+#define ROTE_HANDLERESULT_NOWAY 2 /* means the escape sequence was not
+ * recognized, and there is no chance
+ * that it will even if more characters
+ * are added to it. */
+
+#endif
+
--- /dev/null
+#include "rote.h"
+
+#include <ncurses.h>
+#include <stdlib.h>
+#include <string.h>
+
+static const char *keytable[KEY_MAX+1];
+static int initialized = 0;
+
+static void keytable_init();
+
+void rote_vt_keypress(RoteTerm *rt, int keycode) {
+ char c = (char) keycode;
+
+ if (!initialized) keytable_init();
+
+ if (keycode >= 0 && keycode < KEY_MAX && keytable[keycode])
+ rote_vt_write(rt, keytable[keycode], strlen(keytable[keycode]));
+ else
+ rote_vt_write(rt, &c, 1); /* not special, just write it */
+}
+
+static void keytable_init() {
+ initialized = 1;
+ memset(keytable, 0, KEY_MAX+1 * sizeof(const char*));
+
+ keytable['\n'] = "\r";
+ keytable[KEY_UP] = "\e[A";
+ keytable[KEY_DOWN] = "\e[B";
+ keytable[KEY_RIGHT] = "\e[C";
+ keytable[KEY_LEFT] = "\e[D";
+ keytable[KEY_BACKSPACE] = "\b";
+ keytable[KEY_HOME] = "\e[1~";
+ keytable[KEY_IC] = "\e[2~";
+ keytable[KEY_DC] = "\e[3~";
+ keytable[KEY_END] = "\e[4~";
+ keytable[KEY_PPAGE] = "\e[5~";
+ keytable[KEY_NPAGE] = "\e[6~";
+ keytable[KEY_SUSPEND] = "\x1A"; /* Ctrl+Z gets mapped to this */
+ keytable[KEY_F(1)] = "\e[[A";
+ keytable[KEY_F(2)] = "\e[[B";
+ keytable[KEY_F(3)] = "\e[[C";
+ keytable[KEY_F(4)] = "\e[[D";
+ keytable[KEY_F(5)] = "\e[[E";
+ keytable[KEY_F(6)] = "\e[17~";
+ keytable[KEY_F(7)] = "\e[18~";
+ keytable[KEY_F(8)] = "\e[19~";
+ keytable[KEY_F(9)] = "\e[20~";
+ keytable[KEY_F(10)] = "\e[21~";
+}
+
+
--- /dev/null
+#ifndef btco_ROTE_vtstate_h
+#define btco_ROTE_vtstate_h
+
+#define ESEQ_BUF_SIZE 128 /* size of escape sequence buffer */
+#define MAX_CUSTOM_ES_HANDLERS 32
+
+/* Terminal private data */
+struct RoteTermPrivate_ {
+ bool escaped; /* whether we are currently reading an
+ * escape sequence */
+
+ bool graphmode; /* whether terminal is in graphical
+ * character mode or not */
+
+ int scrolltop, scrollbottom; /* current scrolling region of terminal */
+ int saved_x, saved_y; /* saved cursor position */
+
+ char esbuf[ESEQ_BUF_SIZE]; /* 0-terminated string. Does NOT include
+ * the initial escape (\x1B) character. */
+ int esbuf_len; /* length of buffer. The following property
+ * is always kept: esbuf[esbuf_len] == '\0' */
+
+ int pty; /* file descriptor for the pty attached to
+ * this terminal. -1 if none. */
+
+ /* custom escape sequence handler */
+ rote_es_handler_t handler;
+};
+
+#endif
+
projects / apps / madtty.git / commitdiff