1 files changed, 803 insertions, 0 deletions

diff --git a/src/fe-text/term-terminfo.c b/src/fe-text/term-terminfo.c
new file mode 100644
index 0000000..9902bc0
--- /dev/null
+++ b/src/fe-text/term-terminfo.c
@@ -0,0 +1,803 @@
+/*
+ term-terminfo.c : irssi
+
+    Copyright (C) 2001 Timo Sirainen
+
+    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.,
+    51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+*/
+
+#include "module.h"
+#include <irssi/src/core/signals.h>
+#include <irssi/src/fe-text/term.h>
+#include <irssi/src/fe-text/terminfo-core.h>
+#include <irssi/src/fe-common/core/fe-windows.h>
+#include <irssi/src/fe-text/gui-printtext.h>
+#include <irssi/src/core/utf8.h>
+
+#include <signal.h>
+#include <termios.h>
+#include <stdio.h>
+
+#ifdef HAVE_TERM_H
+#include <term.h>
+#else
+/* TODO: This needs arguments, starting with C2X. */
+int tputs();
+#endif
+
+/* returns number of characters in the beginning of the buffer being a
+   a single character, or -1 if more input is needed. The character will be
+   saved in result */
+typedef int (*TERM_INPUT_FUNC)(const unsigned char *buffer, int size,
+			       unichar *result);
+
+struct _TERM_WINDOW {
+        /* Terminal to use for window */
+	TERM_REC *term;
+
+        /* Area for window in terminal */
+	int x, y;
+	int width, height;
+};
+
+TERM_WINDOW *root_window;
+
+static char *term_lines_empty; /* 1 if line is entirely empty */
+static int vcmove, vcx, vcy, curs_visible;
+static int crealx, crealy, cforcemove;
+static int curs_x, curs_y;
+
+static unsigned int last_fg, last_bg;
+static int last_attrs;
+
+static GSource *sigcont_source;
+static volatile sig_atomic_t got_sigcont;
+static int freeze_counter;
+
+static TERM_INPUT_FUNC input_func;
+static unsigned char term_inbuf[256];
+static int term_inbuf_pos;
+
+/* SIGCONT handler */
+static void sig_cont(int p)
+{
+        got_sigcont = TRUE;
+}
+
+/* SIGCONT GSource */
+static gboolean sigcont_prepare(GSource *source, gint *timeout)
+{
+	*timeout = -1;
+	return got_sigcont;
+}
+
+static gboolean sigcont_check(GSource *source)
+{
+	return got_sigcont;
+}
+
+static gboolean sigcont_dispatch(GSource *source, GSourceFunc callback, gpointer user_data)
+{
+	got_sigcont = FALSE;
+	if (callback == NULL)
+		return TRUE;
+	return callback(user_data);
+}
+
+static gboolean do_redraw(gpointer unused)
+{
+	terminfo_cont(current_term);
+	irssi_redraw();
+
+        return 1;
+}
+
+static GSourceFuncs sigcont_funcs = {
+	.prepare = sigcont_prepare,
+	.check = sigcont_check,
+	.dispatch = sigcont_dispatch
+};
+
+static void term_atexit(void)
+{
+	if (!quitting && current_term && current_term->TI_rmcup) {
+		/* Unexpected exit, avoid switching out of alternate screen
+		   to keep any on-screen errors (like noperl_die()'s) */
+		current_term->TI_rmcup = NULL;
+	}
+
+	term_deinit();
+}
+
+int term_init(void)
+{
+	struct sigaction act;
+        int width, height;
+
+	last_fg = last_bg = -1;
+	last_attrs = 0;
+	vcx = vcy = 0; crealx = crealy = -1;
+	vcmove = FALSE; cforcemove = TRUE;
+        curs_visible = TRUE;
+
+	current_term = terminfo_core_init(stdin, stdout);
+	if (current_term == NULL)
+		return FALSE;
+
+	if (term_get_size(&width, &height)) {
+                current_term->width = width;
+                current_term->height = height;
+	}
+
+        /* grab CONT signal */
+	sigemptyset(&act.sa_mask);
+	act.sa_flags = 0;
+	act.sa_handler = sig_cont;
+	sigaction(SIGCONT, &act, NULL);
+	sigcont_source = g_source_new(&sigcont_funcs, sizeof(GSource));
+	g_source_set_callback(sigcont_source, do_redraw, NULL, NULL);
+	g_source_attach(sigcont_source, NULL);
+
+	curs_x = curs_y = 0;
+	term_width = current_term->width;
+	term_height = current_term->height;
+	root_window = term_window_create(0, 0, term_width, term_height);
+
+        term_lines_empty = g_new0(char, term_height);
+
+        term_set_input_type(TERM_TYPE_8BIT);
+	term_common_init();
+	atexit(term_atexit);
+        return TRUE;
+}
+
+void term_deinit(void)
+{
+	if (current_term != NULL) {
+		signal(SIGCONT, SIG_DFL);
+		g_source_destroy(sigcont_source);
+		g_source_unref(sigcont_source);
+
+		term_common_deinit();
+		terminfo_core_deinit(current_term);
+		current_term = NULL;
+	}
+}
+
+static void term_move_real(void)
+{
+	if (vcx != crealx || vcy != crealy || cforcemove) {
+		if (curs_visible) {
+			terminfo_set_cursor_visible(FALSE);
+			curs_visible = FALSE;
+		}
+
+		if (cforcemove) {
+			crealx = crealy = -1;
+			cforcemove = FALSE;
+		}
+		terminfo_move_relative(crealx, crealy, vcx, vcy);
+                crealx = vcx; crealy = vcy;
+	}
+
+        vcmove = FALSE;
+}
+
+/* Cursor position is unknown - move it immediately to known position */
+static void term_move_reset(int x, int y)
+{
+	if (x >= term_width) x = term_width-1;
+	if (y >= term_height) y = term_height-1;
+
+	vcx = x; vcy = y;
+        cforcemove = TRUE;
+        term_move_real();
+}
+
+/* Resize terminal - if width or height is negative,
+   the new size is unknown and should be figured out somehow */
+void term_resize(int width, int height)
+{
+	if (width < 0 || height < 0) {
+		width = current_term->width;
+                height = current_term->height;
+	}
+
+	if (term_width != width || term_height != height) {
+		term_width = current_term->width = width;
+		term_height = current_term->height = height;
+		term_window_move(root_window, 0, 0, term_width, term_height);
+
+                g_free(term_lines_empty);
+		term_lines_empty = g_new0(char, term_height);
+	}
+
+        term_move_reset(0, 0);
+}
+
+void term_resize_final(int width, int height)
+{
+}
+
+/* Returns TRUE if terminal has colors */
+int term_has_colors(void)
+{
+        return current_term->TI_colors > 0;
+}
+
+/* Force the colors on any way you can */
+void term_force_colors(int set)
+{
+	terminfo_setup_colors(current_term, set);
+}
+
+/* Clear screen */
+void term_clear(void)
+{
+        term_set_color(root_window, ATTR_RESET);
+	terminfo_clear();
+        term_move_reset(0, 0);
+
+	memset(term_lines_empty, 1, term_height);
+}
+
+/* Beep */
+void term_beep(void)
+{
+        terminfo_beep(current_term);
+}
+
+/* Create a new window in terminal */
+TERM_WINDOW *term_window_create(int x, int y, int width, int height)
+{
+	TERM_WINDOW *window;
+
+	window = g_new0(TERM_WINDOW, 1);
+        window->term = current_term;
+	window->x = x; window->y = y;
+	window->width = width; window->height = height;
+        return window;
+}
+
+/* Destroy a terminal window */
+void term_window_destroy(TERM_WINDOW *window)
+{
+        g_free(window);
+}
+
+/* Move/resize a window */
+void term_window_move(TERM_WINDOW *window, int x, int y,
+		      int width, int height)
+{
+	window->x = x;
+	window->y = y;
+	window->width = width;
+        window->height = height;
+}
+
+/* Clear window */
+void term_window_clear(TERM_WINDOW *window)
+{
+	int y;
+
+	terminfo_set_normal();
+	if (window->y == 0 && window->height == term_height && window->width == term_width) {
+		term_clear();
+	} else {
+		for (y = 0; y < window->height; y++) {
+			term_move(window, 0, y);
+			term_clrtoeol(window);
+		}
+	}
+}
+
+/* Scroll window up/down */
+void term_window_scroll(TERM_WINDOW *window, int count)
+{
+	int y;
+
+	terminfo_scroll(window->y, window->y+window->height-1, count);
+        term_move_reset(vcx, vcy);
+
+        /* set the newly scrolled area dirty */
+	for (y = 0; (window->y+y) < term_height && y < window->height; y++)
+		term_lines_empty[window->y+y] = FALSE;
+}
+
+inline static int term_putchar(int c)
+{
+        return fputc(c, current_term->out);
+}
+
+static int termctl_set_color_24bit(int bg, unsigned int lc)
+{
+	static char buf[20];
+	const unsigned char color[] = { lc >> 16, lc >> 8, lc };
+
+	if (!term_use_colors24) {
+		if (bg)
+			terminfo_set_bg(color_24bit_256(color));
+		else
+			terminfo_set_fg(color_24bit_256(color));
+		return -1;
+	}
+
+	/* \e[x8;2;...;...;...m */
+	sprintf(buf, "\033[%d8;2;%d;%d;%dm", bg ? 4 : 3, color[0], color[1], color[2]);
+	return tputs(buf, 0, term_putchar);
+}
+
+#define COLOR_RESET UINT_MAX
+#define COLOR_BLACK24 COLOR_RESET - 1
+
+/* Change active color */
+#ifdef TERM_TRUECOLOR
+void term_set_color2(TERM_WINDOW *window, int col, unsigned int fgcol24, unsigned int bgcol24)
+#else
+void term_set_color(TERM_WINDOW *window, int col)
+#endif
+{
+	int set_normal;
+
+	unsigned int fg, bg;
+#ifdef TERM_TRUECOLOR
+	if (col & ATTR_FGCOLOR24) {
+		if (fgcol24)
+			fg = fgcol24 << 8;
+		else
+			fg = COLOR_BLACK24;
+	} else
+#endif
+		fg = (col & FG_MASK);
+
+#ifdef TERM_TRUECOLOR
+	if (col & ATTR_BGCOLOR24) {
+		if (bgcol24)
+			bg = bgcol24 << 8;
+		else
+			bg = COLOR_BLACK24;
+	} else
+#endif
+		bg = ((col & BG_MASK) >> BG_SHIFT);
+
+	if (!term_use_colors && bg > 0)
+		col |= ATTR_REVERSE;
+
+        set_normal = ((col & ATTR_RESETFG) && last_fg != COLOR_RESET) ||
+		((col & ATTR_RESETBG) && last_bg != COLOR_RESET);
+	if (((last_attrs & ATTR_BOLD) && (col & ATTR_BOLD) == 0) ||
+	    ((last_attrs & ATTR_REVERSE) && (col & ATTR_REVERSE) == 0) ||
+	    ((last_attrs & ATTR_BLINK) && (col & ATTR_BLINK) == 0)) {
+		/* we'll need to get rid of bold/blink/reverse - this
+		   can only be done with setting the default color */
+		set_normal = TRUE;
+	}
+
+	if (set_normal) {
+		last_fg = last_bg = COLOR_RESET;
+                last_attrs = 0;
+		terminfo_set_normal();
+	}
+
+	/* set foreground color */
+	if (fg != last_fg &&
+	    (fg != 0 || (col & ATTR_RESETFG) == 0)) {
+                if (term_use_colors) {
+			last_fg = fg;
+			if (fg >> 8)
+				termctl_set_color_24bit(0,
+							last_fg == COLOR_BLACK24 ? 0
+							: last_fg >> 8);
+			else
+				terminfo_set_fg(last_fg);
+		}
+	}
+
+	/* set background color */
+	if (window && window->term->TI_colors &&
+	    (term_color256map[bg&0xff]&8) == window->term->TI_colors)
+		col |= ATTR_BLINK;
+	if (col & ATTR_BLINK)
+		current_term->set_blink(current_term);
+
+	if (bg != last_bg &&
+	    (bg != 0 || (col & ATTR_RESETBG) == 0)) {
+                if (term_use_colors) {
+			last_bg = bg;
+			if (bg >> 8)
+				termctl_set_color_24bit(1,
+							last_bg == COLOR_BLACK24 ? 0
+							: last_bg >> 8);
+			else
+				terminfo_set_bg(last_bg);
+		}
+	}
+
+	/* reversed text */
+	if (col & ATTR_REVERSE)
+		terminfo_set_reverse();
+
+	/* bold */
+	if (window && window->term->TI_colors &&
+	    (term_color256map[fg&0xff]&8) == window->term->TI_colors)
+		col |= ATTR_BOLD;
+	if (col & ATTR_BOLD)
+		terminfo_set_bold();
+
+	/* underline */
+	if (col & ATTR_UNDERLINE) {
+		if ((last_attrs & ATTR_UNDERLINE) == 0)
+			terminfo_set_uline(TRUE);
+	} else if (last_attrs & ATTR_UNDERLINE)
+		terminfo_set_uline(FALSE);
+
+	/* italic */
+	if (col & ATTR_ITALIC) {
+		if ((last_attrs & ATTR_ITALIC) == 0)
+			terminfo_set_italic(TRUE);
+	} else if (last_attrs & ATTR_ITALIC)
+		terminfo_set_italic(FALSE);
+
+	/* update the new attribute settings whilst ignoring color values.  */
+	last_attrs = col & ~( BG_MASK | FG_MASK );
+}
+
+void term_move(TERM_WINDOW *window, int x, int y)
+{
+	if (x >= 0 && y >= 0) {
+		vcmove = TRUE;
+		vcx = x+window->x;
+		vcy = y+window->y;
+
+		if (vcx >= term_width)
+			vcx = term_width-1;
+		if (vcy >= term_height)
+			vcy = term_height-1;
+	}
+}
+
+static void term_printed_text(int count)
+{
+	term_lines_empty[vcy] = FALSE;
+
+	/* if we continued writing past the line, wrap to next line.
+	   However, next term_move() really shouldn't try to cache
+	   the move, otherwise terminals would try to combine the
+	   last word in upper line with first word in lower line. */
+	vcx += count;
+	while (vcx >= term_width) {
+		vcx -= term_width;
+		if (vcy < term_height-1) vcy++;
+		if (vcx > 0) term_lines_empty[vcy] = FALSE;
+	}
+
+	crealx += count;
+	if (crealx >= term_width)
+		cforcemove = TRUE;
+}
+
+void term_addch(TERM_WINDOW *window, char chr)
+{
+	if (vcmove) term_move_real();
+
+	/* With UTF-8, move cursor only if this char is either
+	   single-byte (8. bit off) or beginning of multibyte
+	   (7. bit off) */
+	if (term_type != TERM_TYPE_UTF8 ||
+	    (chr & 0x80) == 0 || (chr & 0x40) == 0) {
+		term_printed_text(1);
+	}
+
+	putc(chr, window->term->out);
+}
+
+static void term_addch_utf8(TERM_WINDOW *window, unichar chr)
+{
+	char buf[10];
+	int i, len;
+
+	len = g_unichar_to_utf8(chr, buf);
+	for (i = 0;  i < len; i++)
+                putc(buf[i], window->term->out);
+}
+
+void term_add_unichar(TERM_WINDOW *window, unichar chr)
+{
+	if (vcmove) term_move_real();
+
+	switch (term_type) {
+	case TERM_TYPE_UTF8:
+		term_printed_text(unichar_isprint(chr) ? i_wcwidth(chr) : 1);
+                term_addch_utf8(window, chr);
+		break;
+	case TERM_TYPE_BIG5:
+		if (chr > 0xff) {
+			term_printed_text(2);
+			putc((chr >> 8) & 0xff, window->term->out);
+		} else {
+			term_printed_text(1);
+		}
+		putc((chr & 0xff), window->term->out);
+                break;
+	default:
+		term_printed_text(1);
+		putc(chr, window->term->out);
+                break;
+	}
+}
+
+int term_addstr(TERM_WINDOW *window, const char *str)
+{
+	int len, raw_len;
+	unichar tmp;
+	const char *ptr;
+
+	if (vcmove) term_move_real();
+
+	len = 0;
+	raw_len = strlen(str);
+
+	/* The string length depends on the terminal encoding */
+
+	ptr = str;
+
+	if (term_type == TERM_TYPE_UTF8) {
+		while (*ptr != '\0') {
+			tmp = g_utf8_get_char_validated(ptr, -1);
+			/* On utf8 error, treat as single byte and try to
+			   continue interpreting rest of string as utf8 */
+			if (tmp == (gunichar)-1 || tmp == (gunichar)-2) {
+				len++;
+				ptr++;
+			} else {
+				len += unichar_isprint(tmp) ? i_wcwidth(tmp) : 1;
+				ptr = g_utf8_next_char(ptr);
+			}
+		}
+	} else
+		len = raw_len;
+
+        term_printed_text(len);
+
+	/* Use strlen() here since we need the number of raw bytes */
+	fwrite(str, 1, raw_len, window->term->out);
+
+	return len;
+}
+
+void term_clrtoeol(TERM_WINDOW *window)
+{
+	if (vcx < window->x) {
+		/* we just wrapped outside of the split, warp the cursor back into the window */
+		vcx += window->x;
+		vcmove = TRUE;
+	}
+	if (window->x + window->width < term_width) {
+		/* we need to fill a vertical split */
+		if (vcmove) term_move_real();
+		terminfo_repeat(' ', window->x + window->width - vcx + 1);
+		terminfo_move(vcx, vcy);
+		term_lines_empty[vcy] = FALSE;
+	} else {
+		/* clrtoeol() doesn't necessarily understand colors */
+		if (last_fg == -1 && last_bg == -1 &&
+		    (last_attrs & (ATTR_UNDERLINE|ATTR_REVERSE|ATTR_ITALIC)) == 0) {
+			if (!term_lines_empty[vcy]) {
+				if (vcmove) term_move_real();
+				terminfo_clrtoeol();
+				if (vcx == 0) term_lines_empty[vcy] = TRUE;
+			}
+		} else if (vcx < term_width) {
+			/* we'll need to fill the line ourself. */
+			if (vcmove) term_move_real();
+			terminfo_repeat(' ', term_width-vcx);
+			terminfo_move(vcx, vcy);
+			term_lines_empty[vcy] = FALSE;
+		}
+	}
+}
+
+void term_window_clrtoeol(TERM_WINDOW* window, int ypos)
+{
+	if (ypos >= 0 && window->y + ypos != vcy) {
+		/* the line is already full */
+		return;
+	}
+	term_clrtoeol(window);
+	if (window->x + window->width < term_width) {
+		gui_printtext_window_border(window->x + window->width, window->y + ypos);
+		term_set_color(window, ATTR_RESET);
+	}
+}
+
+void term_window_clrtoeol_abs(TERM_WINDOW* window, int ypos)
+{
+	term_window_clrtoeol(window, ypos - window->y);
+}
+
+void term_move_cursor(int x, int y)
+{
+	curs_x = x;
+        curs_y = y;
+}
+
+void term_refresh(TERM_WINDOW *window)
+{
+	if (freeze_counter > 0)
+		return;
+
+	term_move(root_window, curs_x, curs_y);
+	term_move_real();
+
+	if (!curs_visible) {
+		terminfo_set_cursor_visible(TRUE);
+                curs_visible = TRUE;
+	}
+
+	term_set_color(window, ATTR_RESET);
+	fflush(window != NULL ? window->term->out : current_term->out);
+}
+
+void term_refresh_freeze(void)
+{
+        freeze_counter++;
+}
+
+void term_refresh_thaw(void)
+{
+	if (--freeze_counter == 0)
+                term_refresh(NULL);
+}
+
+void term_stop(void)
+{
+	terminfo_stop(current_term);
+	kill(getpid(), SIGTSTP);
+	/* this call needs to stay here in case the TSTP was ignored,
+	   because then we never see a CONT to call the restoration
+	   code. On the other hand we also cannot remove the CONT
+	   handler because then nothing would restore the screen when
+	   Irssi is killed with TSTP/STOP from external. */
+	terminfo_cont(current_term);
+	irssi_redraw();
+}
+
+static int input_utf8(const unsigned char *buffer, int size, unichar *result)
+{
+	unichar c = g_utf8_get_char_validated((char *) buffer, size);
+
+	/* GLib >= 2.63 do not accept Unicode NUL anymore */
+	if (c == (unichar) -2 && *buffer == 0 && size > 0)
+		c = 0;
+
+	switch (c) {
+	case (unichar)-1:
+		/* not UTF8 - fallback to 8bit ascii */
+		*result = *buffer;
+		return 1;
+	case (unichar)-2:
+                /* need more data */
+		return -1;
+	default:
+		*result = c;
+		return g_utf8_skip[*buffer];
+	}
+}
+
+static int input_big5(const unsigned char *buffer, int size, unichar *result)
+{
+	if (is_big5_hi(*buffer)) {
+		/* could be */
+		if (size == 1)
+			return -1;
+
+		if (is_big5_los(buffer[1]) || is_big5_lox(buffer[1])) {
+                        *result = buffer[1] + ((int) *buffer << 8);
+			return 2;
+		}
+	}
+
+        *result = *buffer;
+	return 1;
+}
+
+static int input_8bit(const unsigned char *buffer, int size, unichar *result)
+{
+        *result = *buffer;
+        return 1;
+}
+
+void term_set_input_type(int type)
+{
+	switch (type) {
+	case TERM_TYPE_UTF8:
+                input_func = input_utf8;
+                break;
+	case TERM_TYPE_BIG5:
+                input_func = input_big5;
+		break;
+	default:
+                input_func = input_8bit;
+	}
+}
+
+void term_gets(GArray *buffer, int *line_count)
+{
+	int ret, i, char_len;
+
+        /* fread() doesn't work */
+
+	ret = read(fileno(current_term->in),
+		   term_inbuf + term_inbuf_pos, sizeof(term_inbuf)-term_inbuf_pos);
+	if (ret == 0) {
+		/* EOF - terminal got lost */
+		ret = -1;
+	} else if (ret == -1 && (errno == EINTR || errno == EAGAIN))
+		ret = 0;
+	if (ret == -1)
+		signal_emit("command quit", 1, "Lost terminal");
+
+	if (ret > 0) {
+                /* convert input to unichars. */
+		term_inbuf_pos += ret;
+		for (i = 0; i < term_inbuf_pos; ) {
+			unichar key;
+			char_len = input_func(term_inbuf+i, term_inbuf_pos-i,
+					      &key);
+			if (char_len < 0)
+				break;
+			g_array_append_val(buffer, key);
+			if (key == '\r' || key == '\n')
+				(*line_count)++;
+
+			i += char_len;
+		}
+
+		if (i >= term_inbuf_pos)
+			term_inbuf_pos = 0;
+		else if (i > 0) {
+			memmove(term_inbuf, term_inbuf+i, term_inbuf_pos-i);
+                        term_inbuf_pos -= i;
+		}
+	}
+}
+
+static const char* term_env_warning =
+	"You seem to be running Irssi inside %2$s, but the TERM environment variable "
+	"is set to '%1$s', which can cause display glitches.\n"
+	"Consider changing TERM to '%2$s' or '%2$s-256color' instead.";
+
+void term_environment_check(void)
+{
+	const char *term, *sty, *tmux, *multiplexer;
+
+	term = g_getenv("TERM");
+	sty = g_getenv("STY");
+	tmux = g_getenv("TMUX");
+
+	multiplexer = (sty && *sty) ? "screen" :
+	              (tmux && *tmux) ? "tmux" : NULL;
+
+	if (!multiplexer) {
+		return;
+	}
+
+	if (term && (g_str_has_prefix(term, "screen") ||
+	             g_str_has_prefix(term, "tmux"))) {
+		return;
+	}
+
+	g_warning(term_env_warning, term, multiplexer);
+}