..adding new files..

git-svn-id: http://svn.irssi.org/repos/irssi/trunk@171 dbcabf3a-b0e7-0310-adc4-f8d773084564

src/fe-text/screen.c

@@ -0,0 +1,254 @@
+/*
+ screen.c : All virtual screen management, real screen management is in
+            con_???.c files.
+
+    Copyright (C) 1999 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+*/
+
+#include "module.h"
+#include "signals.h"
+#include "settings.h"
+
+#include "screen.h"
+#include "gui-readline.h"
+#include "gui-windows.h"
+
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+#include <signal.h>
+
+#ifndef COLOR_PAIRS
+#define COLOR_PAIRS 64
+#endif
+
+#define MIN_SCREEN_WIDTH 20
+
+static gint scrx, scry;
+gboolean use_colors;
+static gint freeze_refresh;
+
+#ifdef SIGWINCH
+
+static void sig_winch(int p)
+{
+#ifdef TIOCGWINSZ
+    struct winsize ws;
+    gint ychange, xchange;
+
+    /* Get new window size */
+    if (ioctl(0, TIOCGWINSZ, &ws) < 0)
+	return;
+
+    if (ws.ws_row == LINES && ws.ws_col == COLS)
+    {
+	/* Same size, abort. */
+	return;
+    }
+
+    if (ws.ws_col < MIN_SCREEN_WIDTH)
+	ws.ws_col = MIN_SCREEN_WIDTH;
+
+    /* Resize curses terminal */
+    ychange = ws.ws_row-LINES;
+    xchange = ws.ws_col-COLS;
+#ifdef HAVE_CURSES_RESIZETERM
+    resizeterm(ws.ws_row, ws.ws_col);
+#else
+    deinit_screen();
+    init_screen();
+#endif
+
+    last_text_line += ychange;
+    gui_windows_resize(ychange, xchange != 0);
+#endif
+}
+#endif
+
+/* SIGINT != ^C .. any better way to make this work? */
+void sigint_handler(int p)
+{
+    ungetch(3);
+    readline();
+}
+
+static void read_settings(void)
+{
+	use_colors = settings_get_bool("colors");
+	irssi_redraw();
+}
+
+/* Initialize screen, detect screen length */
+gint init_screen(void)
+{
+    gchar ansi_tab[8] = { 0, 4, 2, 6, 1, 5, 3, 7 };
+    gint num;
+
+    if (!initscr()) return 0;
+
+    if (COLS < MIN_SCREEN_WIDTH)
+	COLS = MIN_SCREEN_WIDTH;
+
+    signal(SIGINT, sigint_handler);
+    cbreak(); noecho(); idlok(stdscr, 1);
+#ifdef HAVE_CURSES_IDCOK
+    idcok(stdscr, 1);
+#endif
+    intrflush(stdscr, FALSE); halfdelay(1); keypad(stdscr, 1);
+
+    settings_add_bool("lookandfeel", "colors", TRUE);
+
+    use_colors = settings_get_bool("colors") && has_colors();
+    if (has_colors()) start_color();
+
+#ifdef HAVE_NCURSES_USE_DEFAULT_COLORS
+    /* this lets us to use the "default" background color for colors <= 7 so
+       background pixmaps etc. show up right */
+    use_default_colors();
+
+    for (num = 1; num < COLOR_PAIRS; num++)
+	init_pair(num, ansi_tab[num & 7], num <= 7 ? -1 : ansi_tab[num >> 3]);
+
+    init_pair(63, 0, -1); /* hm.. not THAT good idea, but probably more people
+                             want dark grey than white on white.. */
+#else
+    for (num = 1; num < COLOR_PAIRS; num++)
+	init_pair(num, ansi_tab[num & 7], ansi_tab[num >> 3]);
+    init_pair(63, 0, 0);
+#endif
+
+    scrx = scry = 0;
+    if (last_text_line == 0)
+    {
+	first_text_line = 0;
+	last_text_line = LINES-1;
+    }
+#ifdef SIGWINCH
+    signal(SIGWINCH, sig_winch);
+#endif
+
+    freeze_refresh = 0;
+    clear();
+
+    signal_add("setup changed", (SIGNAL_FUNC) read_settings);
+    return 1;
+}
+
+/* Deinitialize screen */
+void deinit_screen(void)
+{
+    signal_remove("setup changed", (SIGNAL_FUNC) read_settings);
+    endwin();
+}
+
+void set_color(gint col)
+{
+    gint attr;
+
+    if (!use_colors)
+    {
+        if ((col & 0x70) != 0)
+            attr = A_REVERSE;
+        else
+            attr = 0;
+    }
+    else
+    {
+        if (col & ATTR_COLOR8)
+            attr = A_DIM | COLOR_PAIR(63);
+        else
+            attr = COLOR_PAIR((col&7) + (col&0x70)/2);
+    }
+
+    if (col & 0x08) attr |= A_BOLD;
+    if (col & 0x80) attr |= A_BLINK;
+
+    if (col & ATTR_UNDERLINE) attr |= A_UNDERLINE;
+    if (col & ATTR_REVERSE) attr |= A_REVERSE;
+
+    attrset(attr);
+}
+
+void set_bg(gint col)
+{
+    gint attr;
+
+    if (!use_colors)
+    {
+        if ((col & 0x70) != 0)
+            attr = A_REVERSE;
+        else
+            attr = 0;
+    }
+    else
+    {
+        if (col == 8)
+            attr = A_DIM | COLOR_PAIR(63);
+        else
+            attr = COLOR_PAIR((col&7) + (col&0x70)/2);
+    }
+
+    if (col & 0x08) attr |= A_BOLD;
+    if (col & 0x80) attr |= A_BLINK;
+
+    bkgdset(' ' | attr);
+}
+
+/* Scroll area up */
+void scroll_up(gint y1, gint y2)
+{
+    scrollok(stdscr, TRUE);
+    setscrreg(y1, y2); scrl(1);
+    scrollok(stdscr, FALSE);
+}
+
+/* Scroll area down */
+void scroll_down(gint y1, gint y2)
+{
+    scrollok(stdscr, TRUE);
+    setscrreg(y1, y2); scrl(-1);
+    scrollok(stdscr, FALSE);
+}
+
+void move_cursor(gint y, gint x)
+{
+    scry = y;
+    scrx = x;
+}
+
+void screen_refresh_freeze(void)
+{
+    freeze_refresh++;
+}
+
+void screen_refresh_thaw(void)
+{
+    if (freeze_refresh > 0)
+    {
+	freeze_refresh--;
+	if (freeze_refresh == 0) screen_refresh();
+    }
+}
+
+void screen_refresh(void)
+{
+    if (freeze_refresh == 0)
+    {
+	move(scry, scrx);
+	refresh();
+    }
+}