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Diffstat (limited to 'mdk-stage1/slang/slsmg.c')
| -rw-r--r-- | mdk-stage1/slang/slsmg.c | 1584 |
1 files changed, 0 insertions, 1584 deletions
diff --git a/mdk-stage1/slang/slsmg.c b/mdk-stage1/slang/slsmg.c deleted file mode 100644 index 088557f27..000000000 --- a/mdk-stage1/slang/slsmg.c +++ /dev/null @@ -1,1584 +0,0 @@ -/* SLang Screen management routines */ -/* Copyright (c) 1992, 1999, 2001 John E. Davis - * This file is part of the S-Lang library. - * - * You may distribute under the terms of either the GNU General Public - * License or the Perl Artistic License. - */ - -#include "slinclud.h" - -#include "slang.h" -#include "_slang.h" - -typedef struct Screen_Type - { - int n; /* number of chars written last time */ - int flags; /* line untouched, etc... */ - SLsmg_Char_Type *old, *neew; -#ifndef IBMPC_SYSTEM - unsigned long old_hash, new_hash; -#endif - } -Screen_Type; - -#define TOUCHED 0x1 -#define TRASHED 0x2 -static int Screen_Trashed; - -#if !defined(__MSDOS_16BIT__) -# define MAX_SCREEN_SIZE 256 -#else -# define MAX_SCREEN_SIZE 75 -#endif - -Screen_Type SL_Screen[MAX_SCREEN_SIZE]; -static int Start_Col, Start_Row; -static int Screen_Cols, Screen_Rows; -static int This_Row, This_Col; -static int This_Color; /* only the first 8 bits of this - * are used. The highest bit is used - * to indicate an alternate character - * set. This leaves 127 userdefineable - * color combination. - */ - -#ifndef IBMPC_SYSTEM -#define ALT_CHAR_FLAG 0x80 -#else -#define ALT_CHAR_FLAG 0x00 -#endif - -#if SLTT_HAS_NON_BCE_SUPPORT && !defined(IBMPC_SYSTEM) -#define REQUIRES_NON_BCE_SUPPORT 1 -static int Bce_Color_Offset; -#endif - -int SLsmg_Newline_Behavior = 0; -int SLsmg_Backspace_Moves = 0; -/* Backward compatibility. Not used. */ -/* int SLsmg_Newline_Moves; */ - -static void (*tt_normal_video)(void) = SLtt_normal_video; -static void (*tt_goto_rc)(int, int) = SLtt_goto_rc; -static void (*tt_cls) (void) = SLtt_cls; -static void (*tt_del_eol) (void) = SLtt_del_eol; -static void (*tt_smart_puts) (SLsmg_Char_Type *, SLsmg_Char_Type *, int, int) = SLtt_smart_puts; -static int (*tt_flush_output) (void) = SLtt_flush_output; -static int (*tt_reset_video) (void) = SLtt_reset_video; -static int (*tt_init_video) (void) = SLtt_init_video; -static int *tt_Screen_Rows = &SLtt_Screen_Rows; -static int *tt_Screen_Cols = &SLtt_Screen_Cols; - -#ifndef IBMPC_SYSTEM -static void (*tt_set_scroll_region)(int, int) = SLtt_set_scroll_region; -static void (*tt_reverse_index)(int) = SLtt_reverse_index; -static void (*tt_reset_scroll_region)(void) = SLtt_reset_scroll_region; -static void (*tt_delete_nlines)(int) = SLtt_delete_nlines; -#endif - -#ifndef IBMPC_SYSTEM -static int *tt_Term_Cannot_Scroll = &SLtt_Term_Cannot_Scroll; -static int *tt_Has_Alt_Charset = &SLtt_Has_Alt_Charset; -static char **tt_Graphics_Char_Pairs = &SLtt_Graphics_Char_Pairs; -static int *tt_Use_Blink_For_ACS = &SLtt_Use_Blink_For_ACS; -#endif - -static int Smg_Inited; - -static void blank_line (SLsmg_Char_Type *p, int n, unsigned char ch) -{ - register SLsmg_Char_Type *pmax = p + n; - register SLsmg_Char_Type color_ch; - - color_ch = SLSMG_BUILD_CHAR(ch,This_Color); - - while (p < pmax) - { - *p++ = color_ch; - } -} - -static void clear_region (int row, int n) -{ - int i; - int imax = row + n; - - if (imax > Screen_Rows) imax = Screen_Rows; - for (i = row; i < imax; i++) - { - if (i >= 0) - { - blank_line (SL_Screen[i].neew, Screen_Cols, ' '); - SL_Screen[i].flags |= TOUCHED; - } - } -} - -void SLsmg_erase_eol (void) -{ - int r, c; - - if (Smg_Inited == 0) return; - - c = This_Col - Start_Col; - r = This_Row - Start_Row; - - if ((r < 0) || (r >= Screen_Rows)) return; - if (c < 0) c = 0; else if (c >= Screen_Cols) return; - blank_line (SL_Screen[This_Row].neew + c , Screen_Cols - c, ' '); - SL_Screen[This_Row].flags |= TOUCHED; -} - -static void scroll_up (void) -{ - unsigned int i, imax; - SLsmg_Char_Type *neew; - - neew = SL_Screen[0].neew; - imax = Screen_Rows - 1; - for (i = 0; i < imax; i++) - { - SL_Screen[i].neew = SL_Screen[i + 1].neew; - SL_Screen[i].flags |= TOUCHED; - } - SL_Screen[i].neew = neew; - SL_Screen[i].flags |= TOUCHED; - blank_line (neew, Screen_Cols, ' '); - This_Row--; -} - -void SLsmg_gotorc (int r, int c) -{ - This_Row = r; - This_Col = c; -} - -int SLsmg_get_row (void) -{ - return This_Row; -} - -int SLsmg_get_column (void) -{ - return This_Col; -} - -void SLsmg_erase_eos (void) -{ - if (Smg_Inited == 0) return; - - SLsmg_erase_eol (); - clear_region (This_Row + 1, Screen_Rows); -} - -static int This_Alt_Char; - -void SLsmg_set_char_set (int i) -{ -#ifdef IBMPC_SYSTEM - (void) i; -#else - if ((tt_Use_Blink_For_ACS != NULL) - && (*tt_Use_Blink_For_ACS != 0)) - return;/* alt chars not used and the alt bit - * is used to indicate a blink. - */ - - if (i) This_Alt_Char = ALT_CHAR_FLAG; - else This_Alt_Char = 0; - - This_Color &= 0x7F; - This_Color |= This_Alt_Char; -#endif -} - -void SLsmg_set_color (int color) -{ - if (color < 0) return; -#ifdef REQUIRES_NON_BCE_SUPPORT - color += Bce_Color_Offset; -#endif - This_Color = color | This_Alt_Char; -} - -void SLsmg_reverse_video (void) -{ - SLsmg_set_color (1); -} - -void SLsmg_normal_video (void) -{ - SLsmg_set_color (0); -} - -static int point_visible (int col_too) -{ - return ((This_Row >= Start_Row) && (This_Row < Start_Row + Screen_Rows) - && ((col_too == 0) - || ((This_Col >= Start_Col) - && (This_Col < Start_Col + Screen_Cols)))); -} - -void SLsmg_write_string (char *str) -{ - SLsmg_write_nchars (str, strlen (str)); -} - -void SLsmg_write_nstring (char *str, unsigned int n) -{ - unsigned int width; - char blank = ' '; - - /* Avoid a problem if a user accidently passes a negative value */ - if ((int) n < 0) - return; - - if (str == NULL) width = 0; - else - { - width = strlen (str); - if (width > n) width = n; - SLsmg_write_nchars (str, width); - } - while (width++ < n) SLsmg_write_nchars (&blank, 1); -} - -void SLsmg_write_wrapped_string (char *s, int r, int c, - unsigned int dr, unsigned int dc, - int fill) -{ - register char ch, *p; - int maxc = (int) dc; - - if ((dr == 0) || (dc == 0)) return; - p = s; - dc = 0; - while (1) - { - ch = *p++; - if ((ch == 0) || (ch == '\n')) - { - int diff; - - diff = maxc - (int) dc; - - SLsmg_gotorc (r, c); - SLsmg_write_nchars (s, dc); - if (fill && (diff > 0)) - { - while (diff--) SLsmg_write_char (' '); - } - if ((ch == 0) || (dr == 1)) break; - - r++; - dc = 0; - dr--; - s = p; - } - else if ((int) dc == maxc) - { - SLsmg_gotorc (r, c); - SLsmg_write_nchars (s, dc + 1); - if (dr == 1) break; - - r++; - dc = 0; - dr--; - s = p; - } - else dc++; - } -} - -int SLsmg_Tab_Width = 8; - -/* Minimum value for which eight bit char is displayed as is. */ - -#ifndef IBMPC_SYSTEM -int SLsmg_Display_Eight_Bit = 160; -static unsigned char Alt_Char_Set[129];/* 129th is used as a flag */ -#else -int SLsmg_Display_Eight_Bit = 128; -#endif - -void SLsmg_write_nchars (char *str, unsigned int n) -{ - register SLsmg_Char_Type *p, old, neew, color; - unsigned char ch; - unsigned int flags; - int len, start_len, max_len; - char *str_max; - int newline_flag; -#ifndef IBMPC_SYSTEM - int alt_char_set_flag; - - alt_char_set_flag = ((This_Color & ALT_CHAR_FLAG) - && ((tt_Use_Blink_For_ACS == NULL) - || (*tt_Use_Blink_For_ACS == 0))); -#endif - - if (Smg_Inited == 0) return; - - str_max = str + n; - color = This_Color; - - top: /* get here only on newline */ - - newline_flag = 0; - start_len = Start_Col; - - if (point_visible (0) == 0) return; - - len = This_Col; - max_len = start_len + Screen_Cols; - - p = SL_Screen[This_Row - Start_Row].neew; - if (len > start_len) p += (len - start_len); - - flags = SL_Screen[This_Row - Start_Row].flags; - while ((len < max_len) && (str < str_max)) - { - ch = (unsigned char) *str++; - -#ifndef IBMPC_SYSTEM - if (alt_char_set_flag) - ch = Alt_Char_Set [ch & 0x7F]; -#endif - if (((ch >= ' ') && (ch < 127)) - || (ch >= (unsigned char) SLsmg_Display_Eight_Bit) -#ifndef IBMPC_SYSTEM - || alt_char_set_flag -#endif - ) - { - len += 1; - if (len > start_len) - { - old = *p; - neew = SLSMG_BUILD_CHAR(ch,color); - if (old != neew) - { - flags |= TOUCHED; - *p = neew; - } - p++; - } - } - - else if ((ch == '\t') && (SLsmg_Tab_Width > 0)) - { - n = len; - n += SLsmg_Tab_Width; - n = SLsmg_Tab_Width - (n % SLsmg_Tab_Width); - if ((unsigned int) len + n > (unsigned int) max_len) - n = (unsigned int) (max_len - len); - neew = SLSMG_BUILD_CHAR(' ',color); - while (n--) - { - len += 1; - if (len > start_len) - { - if (*p != neew) - { - flags |= TOUCHED; - *p = neew; - } - p++; - } - } - } - else if ((ch == '\n') - && (SLsmg_Newline_Behavior != SLSMG_NEWLINE_PRINTABLE)) - { - newline_flag = 1; - break; - } - else if ((ch == 0x8) && SLsmg_Backspace_Moves) - { - if (len != 0) len--; - } - else - { - if (ch & 0x80) - { - neew = SLSMG_BUILD_CHAR('~',color); - len += 1; - if (len > start_len) - { - if (*p != neew) - { - *p = neew; - flags |= TOUCHED; - } - p++; - if (len == max_len) break; - ch &= 0x7F; - } - } - - len += 1; - if (len > start_len) - { - neew = SLSMG_BUILD_CHAR('^',color); - if (*p != neew) - { - *p = neew; - flags |= TOUCHED; - } - p++; - if (len == max_len) break; - } - - if (ch == 127) ch = '?'; else ch = ch + '@'; - len++; - if (len > start_len) - { - neew = SLSMG_BUILD_CHAR(ch,color); - if (*p != neew) - { - *p = neew; - flags |= TOUCHED; - } - p++; - } - } - } - - SL_Screen[This_Row - Start_Row].flags = flags; - This_Col = len; - - if (SLsmg_Newline_Behavior == 0) - return; - - if (newline_flag == 0) - { - while (str < str_max) - { - if (*str == '\n') break; - str++; - } - if (str == str_max) return; - str++; - } - - This_Row++; - This_Col = 0; - if (This_Row == Start_Row + Screen_Rows) - { - if (SLsmg_Newline_Behavior == SLSMG_NEWLINE_SCROLLS) scroll_up (); - } - goto top; -} - -void SLsmg_write_char (char ch) -{ - SLsmg_write_nchars (&ch, 1); -} - -static int Cls_Flag; - -void SLsmg_cls (void) -{ - int tac; - if (Smg_Inited == 0) return; - - tac = This_Alt_Char; This_Alt_Char = 0; - SLsmg_set_color (0); - clear_region (0, Screen_Rows); - This_Alt_Char = tac; - SLsmg_set_color (0); - Cls_Flag = 1; -} -#if 0 -static void do_copy (SLsmg_Char_Type *a, SLsmg_Char_Type *b) -{ - SLsmg_Char_Type *amax = a + Screen_Cols; - - while (a < amax) *a++ = *b++; -} -#endif - -#ifndef IBMPC_SYSTEM -int SLsmg_Scroll_Hash_Border = 0; -static unsigned long compute_hash (SLsmg_Char_Type *s, int n) -{ - register unsigned long h = 0, g; - register unsigned long sum = 0; - register SLsmg_Char_Type *smax, ch; - int is_blank = 2; - - s += SLsmg_Scroll_Hash_Border; - smax = s + (n - SLsmg_Scroll_Hash_Border); - while (s < smax) - { - ch = *s++; - if (is_blank && (SLSMG_EXTRACT_CHAR(ch) != 32)) is_blank--; - - sum += ch; - - h = sum + (h << 3); - if ((g = h & 0xE0000000UL) != 0) - { - h = h ^ (g >> 24); - h = h ^ g; - } - } - if (is_blank) return 0; - return h; -} - -static unsigned long Blank_Hash; - -static int try_scroll_down (int rmin, int rmax) -{ - int i, r1, r2, di, j; - unsigned long hash; - int did_scroll; - int color; - SLsmg_Char_Type *tmp; - int ignore; - - did_scroll = 0; - for (i = rmax; i > rmin; i--) - { - hash = SL_Screen[i].new_hash; - if (hash == Blank_Hash) continue; - - if ((hash == SL_Screen[i].old_hash) -#if 0 - || ((i + 1 < Screen_Rows) && (hash == SL_Screen[i + 1].old_hash)) - || ((i - 1 > rmin) && (SL_Screen[i].old_hash == SL_Screen[i - 1].new_hash)) -#endif - ) - continue; - - for (j = i - 1; j >= rmin; j--) - { - if (hash == SL_Screen[j].old_hash) break; - } - if (j < rmin) continue; - - r2 = i; /* end scroll region */ - - di = i - j; - j--; - ignore = 0; - while ((j >= rmin) && (SL_Screen[j].old_hash == SL_Screen[j + di].new_hash)) - { - if (SL_Screen[j].old_hash == Blank_Hash) ignore++; - j--; - } - r1 = j + 1; - - /* If this scroll only scrolls this line into place, don't do it. - */ - if ((di > 1) && (r1 + di + ignore == r2)) continue; - - /* If there is anything in the scrolling region that is ok, abort the - * scroll. - */ - - for (j = r1; j <= r2; j++) - { - if ((SL_Screen[j].old_hash != Blank_Hash) - && (SL_Screen[j].old_hash == SL_Screen[j].new_hash)) - { - /* See if the scroll is happens to scroll this one into place. */ - if ((j + di > r2) || (SL_Screen[j].old_hash != SL_Screen[j + di].new_hash)) - break; - } - } - if (j <= r2) continue; - - color = This_Color; This_Color = 0; - did_scroll = 1; - (*tt_normal_video) (); - (*tt_set_scroll_region) (r1, r2); - (*tt_goto_rc) (0, 0); - (*tt_reverse_index) (di); - (*tt_reset_scroll_region) (); - /* Now we have a hole in the screen. - * Make the virtual screen look like it. - * - * Note that if the terminal does not support BCE, then we have - * no idea what color the hole is. So, for this case, we do not - * want to add Bce_Color_Offset to This_Color since if Bce_Color_Offset - * is non-zero, then This_Color = 0 does not match any valid color - * obtained by adding Bce_Color_Offset. - */ - for (j = r1; j <= r2; j++) SL_Screen[j].flags = TOUCHED; - - while (di--) - { - tmp = SL_Screen[r2].old; - for (j = r2; j > r1; j--) - { - SL_Screen[j].old = SL_Screen[j - 1].old; - SL_Screen[j].old_hash = SL_Screen[j - 1].old_hash; - } - SL_Screen[r1].old = tmp; - blank_line (SL_Screen[r1].old, Screen_Cols, ' '); - SL_Screen[r1].old_hash = Blank_Hash; - r1++; - } - This_Color = color; - } - - return did_scroll; -} - -static int try_scroll_up (int rmin, int rmax) -{ - int i, r1, r2, di, j; - unsigned long hash; - int did_scroll; - int color; - SLsmg_Char_Type *tmp; - int ignore; - - did_scroll = 0; - for (i = rmin; i < rmax; i++) - { - hash = SL_Screen[i].new_hash; - if (hash == Blank_Hash) continue; - if (hash == SL_Screen[i].old_hash) - continue; - /* find a match further down screen */ - for (j = i + 1; j <= rmax; j++) - { - if (hash == SL_Screen[j].old_hash) break; - } - if (j > rmax) continue; - - r1 = i; /* beg scroll region */ - di = j - i; /* number of lines to scroll */ - j++; /* since we know this is a match */ - - /* find end of scroll region */ - ignore = 0; - while ((j <= rmax) && (SL_Screen[j].old_hash == SL_Screen[j - di].new_hash)) - { - if (SL_Screen[j].old_hash == Blank_Hash) ignore++; - j++; - } - r2 = j - 1; /* end of scroll region */ - - /* If this scroll only scrolls this line into place, don't do it. - */ - if ((di > 1) && (r1 + di + ignore == r2)) continue; - - /* If there is anything in the scrolling region that is ok, abort the - * scroll. - */ - - for (j = r1; j <= r2; j++) - { - if ((SL_Screen[j].old_hash != Blank_Hash) - && (SL_Screen[j].old_hash == SL_Screen[j].new_hash)) - { - if ((j - di < r1) || (SL_Screen[j].old_hash != SL_Screen[j - di].new_hash)) - break; - } - - } - if (j <= r2) continue; - - did_scroll = 1; - - /* See the above comments about BCE */ - color = This_Color; This_Color = 0; - (*tt_normal_video) (); - (*tt_set_scroll_region) (r1, r2); - (*tt_goto_rc) (0, 0); /* relative to scroll region */ - (*tt_delete_nlines) (di); - (*tt_reset_scroll_region) (); - /* Now we have a hole in the screen. Make the virtual screen look - * like it. - */ - for (j = r1; j <= r2; j++) SL_Screen[j].flags = TOUCHED; - - while (di--) - { - tmp = SL_Screen[r1].old; - for (j = r1; j < r2; j++) - { - SL_Screen[j].old = SL_Screen[j + 1].old; - SL_Screen[j].old_hash = SL_Screen[j + 1].old_hash; - } - SL_Screen[r2].old = tmp; - blank_line (SL_Screen[r2].old, Screen_Cols, ' '); - SL_Screen[r2].old_hash = Blank_Hash; - r2--; - } - This_Color = color; - } - return did_scroll; -} - -static void try_scroll (void) -{ - int r1, rmin, rmax; - int num_up, num_down; - /* find region limits. */ - - for (rmax = Screen_Rows - 1; rmax > 0; rmax--) - { - if (SL_Screen[rmax].new_hash != SL_Screen[rmax].old_hash) - { - r1 = rmax - 1; - if ((r1 == 0) - || (SL_Screen[r1].new_hash != SL_Screen[r1].old_hash)) - break; - - rmax = r1; - } - } - - for (rmin = 0; rmin < rmax; rmin++) - { - if (SL_Screen[rmin].new_hash != SL_Screen[rmin].old_hash) - { - r1 = rmin + 1; - if ((r1 == rmax) - || (SL_Screen[r1].new_hash != SL_Screen[r1].old_hash)) - break; - - rmin = r1; - } - } - - /* Below, we have two scrolling algorithms. The first has the effect of - * scrolling lines down. This is usually appropriate when one moves - * up the display, e.g., with the UP arrow. The second algorithm is - * appropriate for going the other way. It is important to choose the - * correct one. - */ - - num_up = 0; - for (r1 = rmin; r1 < rmax; r1++) - { - if (SL_Screen[r1].new_hash == SL_Screen[r1 + 1].old_hash) - num_up++; - } - - num_down = 0; - for (r1 = rmax; r1 > rmin; r1--) - { - if (SL_Screen[r1 - 1].old_hash == SL_Screen[r1].new_hash) - num_down++; - } - - if (num_up > num_down) - { - if (try_scroll_up (rmin, rmax)) - return; - - (void) try_scroll_down (rmin, rmax); - } - else - { - if (try_scroll_down (rmin, rmax)) - return; - - (void) try_scroll_up (rmin, rmax); - } -} -#endif /* NOT IBMPC_SYSTEM */ - - -#ifdef REQUIRES_NON_BCE_SUPPORT -static void adjust_colors (void) -{ - int bce; - int i; - - bce = Bce_Color_Offset; - Bce_Color_Offset = _SLtt_get_bce_color_offset (); - if (bce == Bce_Color_Offset) - return; - - if ((tt_Use_Blink_For_ACS != NULL) - && (*tt_Use_Blink_For_ACS != 0)) - return; /* this mode does not support non-BCE - * terminals. - */ - - for (i = 0; i < Screen_Rows; i++) - { - SLsmg_Char_Type *s, *smax; - - SL_Screen[i].flags |= TRASHED; - s = SL_Screen[i].neew; - smax = s + Screen_Cols; - - while (s < smax) - { - int color = (int) SLSMG_EXTRACT_COLOR(*s); - int acs; - - if (color < 0) - { - s++; - continue; - } - - acs = color & 0x80; - color = (color & 0x7F) - bce; - color += Bce_Color_Offset; - if (color >= 0) - { - unsigned char ch = SLSMG_EXTRACT_CHAR(*s); - *s = SLSMG_BUILD_CHAR(ch, ((color&0x7F)|acs)); - } - s++; - } - } -} -#endif - -void SLsmg_refresh (void) -{ - int i; -#ifndef IBMPC_SYSTEM - int trashed = 0; -#endif - - if (Smg_Inited == 0) return; - - if (Screen_Trashed) - { - Cls_Flag = 1; - for (i = 0; i < Screen_Rows; i++) - SL_Screen[i].flags |= TRASHED; -#ifdef REQUIRES_NON_BCE_SUPPORT - adjust_colors (); -#endif - } - -#ifndef IBMPC_SYSTEM - for (i = 0; i < Screen_Rows; i++) - { - if (SL_Screen[i].flags == 0) continue; - SL_Screen[i].new_hash = compute_hash (SL_Screen[i].neew, Screen_Cols); - trashed = 1; - } -#endif - - if (Cls_Flag) - { - (*tt_normal_video) (); (*tt_cls) (); - } -#ifndef IBMPC_SYSTEM - else if (trashed && (*tt_Term_Cannot_Scroll == 0)) try_scroll (); -#endif - - for (i = 0; i < Screen_Rows; i++) - { - if (SL_Screen[i].flags == 0) continue; - - if (Cls_Flag || SL_Screen[i].flags & TRASHED) - { - int color = This_Color; - - if (Cls_Flag == 0) - { - (*tt_goto_rc) (i, 0); - (*tt_del_eol) (); - } - This_Color = 0; - blank_line (SL_Screen[i].old, Screen_Cols, ' '); - This_Color = color; - } - - SL_Screen[i].old[Screen_Cols] = 0; - SL_Screen[i].neew[Screen_Cols] = 0; - - (*tt_smart_puts) (SL_Screen[i].neew, SL_Screen[i].old, Screen_Cols, i); - - SLMEMCPY ((char *) SL_Screen[i].old, (char *) SL_Screen[i].neew, - Screen_Cols * sizeof (SLsmg_Char_Type)); - - SL_Screen[i].flags = 0; -#ifndef IBMPC_SYSTEM - SL_Screen[i].old_hash = SL_Screen[i].new_hash; -#endif - } - - if (point_visible (1)) (*tt_goto_rc) (This_Row - Start_Row, This_Col - Start_Col); - (*tt_flush_output) (); - Cls_Flag = 0; - Screen_Trashed = 0; -} - -static int compute_clip (int row, int n, int box_start, int box_end, - int *rmin, int *rmax) -{ - int row_max; - - if (n < 0) return 0; - if (row >= box_end) return 0; - row_max = row + n; - if (row_max <= box_start) return 0; - - if (row < box_start) row = box_start; - if (row_max >= box_end) row_max = box_end; - *rmin = row; - *rmax = row_max; - return 1; -} - -void SLsmg_touch_lines (int row, unsigned int n) -{ - int i; - int r1, r2; - - /* Allow this function to be called even when we are not initialied. - * Calling this function is useful after calling SLtt_set_color - * to force the display to be redrawn - */ - - if (Smg_Inited == 0) - return; - - if (0 == compute_clip (row, (int) n, Start_Row, Start_Row + Screen_Rows, &r1, &r2)) - return; - - r1 -= Start_Row; - r2 -= Start_Row; - for (i = r1; i < r2; i++) - { - SL_Screen[i].flags |= TRASHED; - } -} - -void SLsmg_touch_screen (void) -{ - Screen_Trashed = 1; -} - - -#ifndef IBMPC_SYSTEM -static char Fake_Alt_Char_Pairs [] = "a:j+k+l+m+q-t+u+v+w+x|n+`+f\\g#~o,<+>.v-^h#0#"; - -static void init_alt_char_set (void) -{ - int i; - unsigned char *p, *pmax, ch; - - if (Alt_Char_Set[128] == 128) return; - - i = 32; - memset ((char *)Alt_Char_Set, ' ', i); - while (i <= 128) - { - Alt_Char_Set [i] = i; - i++; - } - - /* Map to VT100 */ - if (*tt_Has_Alt_Charset) - { - if (tt_Graphics_Char_Pairs == NULL) p = NULL; - else p = (unsigned char *) *tt_Graphics_Char_Pairs; - if (p == NULL) return; - } - else p = (unsigned char *) Fake_Alt_Char_Pairs; - pmax = p + strlen ((char *) p); - - /* Some systems have messed up entries for this */ - while (p < pmax) - { - ch = *p++; - ch &= 0x7F; /* should be unnecessary */ - Alt_Char_Set [ch] = *p; - p++; - } -} -#endif - -#ifndef IBMPC_SYSTEM -# define BLOCK_SIGNALS SLsig_block_signals () -# define UNBLOCK_SIGNALS SLsig_unblock_signals () -#else -# define BLOCK_SIGNALS (void)0 -# define UNBLOCK_SIGNALS (void)0 -#endif - -static int Smg_Suspended; -int SLsmg_suspend_smg (void) -{ - BLOCK_SIGNALS; - - if (Smg_Suspended == 0) - { - (*tt_reset_video) (); - Smg_Suspended = 1; - } - - UNBLOCK_SIGNALS; - return 0; -} - -int SLsmg_resume_smg (void) -{ - BLOCK_SIGNALS; - - if (Smg_Suspended == 0) - { - UNBLOCK_SIGNALS; - return 0; - } - - Smg_Suspended = 0; - - if (-1 == (*tt_init_video) ()) - { - UNBLOCK_SIGNALS; - return -1; - } - - Cls_Flag = 1; - SLsmg_touch_screen (); - SLsmg_refresh (); - - UNBLOCK_SIGNALS; - return 0; -} - - -static void reset_smg (void) -{ - int i; - if (Smg_Inited == 0) - return; - - for (i = 0; i < Screen_Rows; i++) - { - SLfree ((char *)SL_Screen[i].old); - SLfree ((char *)SL_Screen[i].neew); - SL_Screen[i].old = SL_Screen[i].neew = NULL; - } - This_Alt_Char = This_Color = 0; - Smg_Inited = 0; -} - - -static int init_smg (void) -{ - int i, len; - SLsmg_Char_Type *old, *neew; - - Smg_Inited = 0; - -#ifdef REQUIRES_NON_BCE_SUPPORT - Bce_Color_Offset = _SLtt_get_bce_color_offset (); -#endif - - Screen_Rows = *tt_Screen_Rows; - if (Screen_Rows > MAX_SCREEN_SIZE) - Screen_Rows = MAX_SCREEN_SIZE; - - Screen_Cols = *tt_Screen_Cols; - - This_Col = This_Row = Start_Col = Start_Row = 0; - - This_Alt_Char = 0; - SLsmg_set_color (0); - Cls_Flag = 1; -#ifndef IBMPC_SYSTEM - init_alt_char_set (); -#endif - len = Screen_Cols + 3; - for (i = 0; i < Screen_Rows; i++) - { - if ((NULL == (old = (SLsmg_Char_Type *) SLmalloc (sizeof(SLsmg_Char_Type) * len))) - || ((NULL == (neew = (SLsmg_Char_Type *) SLmalloc (sizeof(SLsmg_Char_Type) * len))))) - { - SLfree ((char *) old); - return -1; - } - blank_line (old, len, ' '); - blank_line (neew, len, ' '); - SL_Screen[i].old = old; - SL_Screen[i].neew = neew; - SL_Screen[i].flags = 0; -#ifndef IBMPC_SYSTEM - Blank_Hash = compute_hash (old, Screen_Cols); - SL_Screen[i].new_hash = SL_Screen[i].old_hash = Blank_Hash; -#endif - } - - _SLtt_color_changed_hook = SLsmg_touch_screen; - Screen_Trashed = 1; - Smg_Inited = 1; - return 0; -} - - -int SLsmg_init_smg (void) -{ - int ret; - - BLOCK_SIGNALS; - - if (Smg_Inited) - SLsmg_reset_smg (); - - if (-1 == (*tt_init_video) ()) - { - UNBLOCK_SIGNALS; - return -1; - } - - if (-1 == (ret = init_smg ())) - (void) (*tt_reset_video)(); - - UNBLOCK_SIGNALS; - return ret; -} - -int SLsmg_reinit_smg (void) -{ - int ret; - - if (Smg_Inited == 0) - return SLsmg_init_smg (); - - BLOCK_SIGNALS; - reset_smg (); - ret = init_smg (); - UNBLOCK_SIGNALS; - return ret; -} - -void SLsmg_reset_smg (void) -{ - if (Smg_Inited == 0) - return; - - BLOCK_SIGNALS; - - reset_smg (); - (*tt_reset_video)(); - - UNBLOCK_SIGNALS; -} - -SLsmg_Char_Type SLsmg_char_at (void) -{ - if (Smg_Inited == 0) return 0; - - if (point_visible (1)) - { - return SL_Screen[This_Row - Start_Row].neew[This_Col - Start_Col]; - } - return 0; -} - -void SLsmg_vprintf (char *fmt, va_list ap) -{ - char buf[1024]; - - if (Smg_Inited == 0) return; - - (void) _SLvsnprintf (buf, sizeof (buf), fmt, ap); - SLsmg_write_string (buf); -} - -void SLsmg_printf (char *fmt, ...) -{ - va_list ap; - unsigned int len; - char *f; - - if (Smg_Inited == 0) return; - - va_start(ap, fmt); - - f = fmt; - while (*f && (*f != '%')) - f++; - len = (unsigned int) (f - fmt); - if (len) SLsmg_write_nchars (fmt, len); - - if (*f != 0) - SLsmg_vprintf (f, ap); - - va_end (ap); -} - -void SLsmg_set_screen_start (int *r, int *c) -{ - int orow = Start_Row, oc = Start_Col; - - if (Smg_Inited == 0) return; - - if (c == NULL) Start_Col = 0; - else - { - Start_Col = *c; - *c = oc; - } - if (r == NULL) Start_Row = 0; - else - { - Start_Row = *r; - *r = orow; - } -} - -void SLsmg_draw_object (int r, int c, unsigned char object) -{ - This_Row = r; This_Col = c; - - if (Smg_Inited == 0) return; - - if (point_visible (1)) - { - int color = This_Color; - This_Color |= ALT_CHAR_FLAG; - SLsmg_write_char (object); - This_Color = color; - } - - This_Col = c + 1; -} - -void SLsmg_draw_hline (unsigned int n) -{ - static unsigned char hbuf[16]; - int count; - int cmin, cmax; - int final_col = This_Col + (int) n; - int save_color; - - if (Smg_Inited == 0) return; - - if ((This_Row < Start_Row) || (This_Row >= Start_Row + Screen_Rows) - || (0 == compute_clip (This_Col, n, Start_Col, Start_Col + Screen_Cols, - &cmin, &cmax))) - { - This_Col = final_col; - return; - } - - if (hbuf[0] == 0) - { - SLMEMSET ((char *) hbuf, SLSMG_HLINE_CHAR, 16); - } - - n = (unsigned int)(cmax - cmin); - count = n / 16; - - save_color = This_Color; - This_Color |= ALT_CHAR_FLAG; - This_Col = cmin; - - SLsmg_write_nchars ((char *) hbuf, n % 16); - while (count-- > 0) - { - SLsmg_write_nchars ((char *) hbuf, 16); - } - - This_Color = save_color; - This_Col = final_col; -} - -void SLsmg_draw_vline (int n) -{ - unsigned char ch = SLSMG_VLINE_CHAR; - int c = This_Col, rmin, rmax; - int final_row = This_Row + n; - int save_color; - - if (Smg_Inited == 0) return; - - if (((c < Start_Col) || (c >= Start_Col + Screen_Cols)) || - (0 == compute_clip (This_Row, n, Start_Row, Start_Row + Screen_Rows, - &rmin, &rmax))) - { - This_Row = final_row; - return; - } - - save_color = This_Color; - This_Color |= ALT_CHAR_FLAG; - - for (This_Row = rmin; This_Row < rmax; This_Row++) - { - This_Col = c; - SLsmg_write_nchars ((char *) &ch, 1); - } - - This_Col = c; This_Row = final_row; - This_Color = save_color; -} - -void SLsmg_draw_box (int r, int c, unsigned int dr, unsigned int dc) -{ - if (Smg_Inited == 0) return; - - if (!dr || !dc) return; - This_Row = r; This_Col = c; - dr--; dc--; - SLsmg_draw_hline (dc); - SLsmg_draw_vline (dr); - This_Row = r; This_Col = c; - SLsmg_draw_vline (dr); - SLsmg_draw_hline (dc); - SLsmg_draw_object (r, c, SLSMG_ULCORN_CHAR); - SLsmg_draw_object (r, c + (int) dc, SLSMG_URCORN_CHAR); - SLsmg_draw_object (r + (int) dr, c, SLSMG_LLCORN_CHAR); - SLsmg_draw_object (r + (int) dr, c + (int) dc, SLSMG_LRCORN_CHAR); - This_Row = r; This_Col = c; -} - -void SLsmg_fill_region (int r, int c, unsigned int dr, unsigned int dc, unsigned char ch) -{ - static unsigned char hbuf[16]; - int count; - int dcmax, rmax; - - if (Smg_Inited == 0) return; - - SLsmg_gotorc (r, c); - r = This_Row; c = This_Col; - - dcmax = Screen_Cols - This_Col; - if (dcmax < 0) - return; - - if (dc > (unsigned int) dcmax) dc = (unsigned int) dcmax; - - rmax = This_Row + dr; - if (rmax > Screen_Rows) rmax = Screen_Rows; - -#if 0 - ch = Alt_Char_Set[ch]; -#endif - if (ch != hbuf[0]) SLMEMSET ((char *) hbuf, (char) ch, 16); - - for (This_Row = r; This_Row < rmax; This_Row++) - { - This_Col = c; - count = dc / 16; - SLsmg_write_nchars ((char *) hbuf, dc % 16); - while (count-- > 0) - { - SLsmg_write_nchars ((char *) hbuf, 16); - } - } - - This_Row = r; -} - -void SLsmg_forward (int n) -{ - This_Col += n; -} - -void SLsmg_write_color_chars (SLsmg_Char_Type *s, unsigned int len) -{ - SLsmg_Char_Type *smax, sh; - char buf[32], *b, *bmax; - int color, save_color; - - if (Smg_Inited == 0) return; - - smax = s + len; - b = buf; - bmax = b + sizeof (buf); - - save_color = This_Color; - - while (s < smax) - { - sh = *s++; - - color = SLSMG_EXTRACT_COLOR(sh); - -#if REQUIRES_NON_BCE_SUPPORT - if (Bce_Color_Offset) - { - if (color & 0x80) - color = ((color & 0x7F) + Bce_Color_Offset) | 0x80; - else - color = ((color & 0x7F) + Bce_Color_Offset) & 0x7F; - } -#endif - - if ((color != This_Color) || (b == bmax)) - { - if (b != buf) - { - SLsmg_write_nchars (buf, (int) (b - buf)); - b = buf; - } - This_Color = color; - } - *b++ = (char) SLSMG_EXTRACT_CHAR(sh); - } - - if (b != buf) - SLsmg_write_nchars (buf, (unsigned int) (b - buf)); - - This_Color = save_color; -} - -unsigned int SLsmg_read_raw (SLsmg_Char_Type *buf, unsigned int len) -{ - unsigned int r, c; - - if (Smg_Inited == 0) return 0; - - if (0 == point_visible (1)) return 0; - - r = (unsigned int) (This_Row - Start_Row); - c = (unsigned int) (This_Col - Start_Col); - - if (c + len > (unsigned int) Screen_Cols) - len = (unsigned int) Screen_Cols - c; - - memcpy ((char *) buf, (char *) (SL_Screen[r].neew + c), len * sizeof (SLsmg_Char_Type)); - return len; -} - -unsigned int SLsmg_write_raw (SLsmg_Char_Type *buf, unsigned int len) -{ - unsigned int r, c; - SLsmg_Char_Type *dest; - - if (Smg_Inited == 0) return 0; - - if (0 == point_visible (1)) return 0; - - r = (unsigned int) (This_Row - Start_Row); - c = (unsigned int) (This_Col - Start_Col); - - if (c + len > (unsigned int) Screen_Cols) - len = (unsigned int) Screen_Cols - c; - - dest = SL_Screen[r].neew + c; - - if (0 != memcmp ((char *) dest, (char *) buf, len * sizeof (SLsmg_Char_Type))) - { - memcpy ((char *) dest, (char *) buf, len * sizeof (SLsmg_Char_Type)); - SL_Screen[r].flags |= TOUCHED; - } - return len; -} - -void -SLsmg_set_color_in_region (int color, int r, int c, unsigned int dr, unsigned int dc) -{ - int cmax, rmax; - SLsmg_Char_Type char_mask; - - if (Smg_Inited == 0) return; - - c -= Start_Col; - r -= Start_Row; - - cmax = c + (int) dc; - rmax = r + (int) dr; - - if (cmax > Screen_Cols) cmax = Screen_Cols; - if (rmax > Screen_Rows) rmax = Screen_Rows; - - if (c < 0) c = 0; - if (r < 0) r = 0; - -#if REQUIRES_NON_BCE_SUPPORT - if (Bce_Color_Offset) - { - if (color & 0x80) - color = ((color & 0x7F) + Bce_Color_Offset) | 0x80; - else - color = ((color & 0x7F) + Bce_Color_Offset) & 0x7F; - } -#endif - color = color << 8; - - char_mask = 0xFF; - -#ifndef IBMPC_SYSTEM - if ((tt_Use_Blink_For_ACS == NULL) - || (0 == *tt_Use_Blink_For_ACS)) - char_mask = 0x80FF; -#endif - - while (r < rmax) - { - SLsmg_Char_Type *s, *smax; - - SL_Screen[r].flags |= TOUCHED; - s = SL_Screen[r].neew; - smax = s + cmax; - s += c; - - while (s < smax) - { - *s = (*s & char_mask) | color; - s++; - } - r++; - } -} - -void SLsmg_set_terminal_info (SLsmg_Term_Type *tt) -{ - if (tt == NULL) /* use default */ - return; - - if ((tt->tt_normal_video == NULL) - || (tt->tt_goto_rc == NULL) - || (tt->tt_cls == NULL) - || (tt->tt_del_eol == NULL) - || (tt->tt_smart_puts == NULL) - || (tt->tt_flush_output == NULL) - || (tt->tt_reset_video == NULL) - || (tt->tt_init_video == NULL) -#ifndef IBMPC_SYSTEM - || (tt->tt_set_scroll_region == NULL) - || (tt->tt_reverse_index == NULL) - || (tt->tt_reset_scroll_region == NULL) - || (tt->tt_delete_nlines == NULL) - /* Variables */ - || (tt->tt_term_cannot_scroll == NULL) - || (tt->tt_has_alt_charset == NULL) -#if 0 /* These can be NULL */ - || (tt->tt_use_blink_for_acs == NULL) - || (tt->tt_graphic_char_pairs == NULL) -#endif - || (tt->tt_screen_cols == NULL) - || (tt->tt_screen_rows == NULL) -#endif - ) - SLang_exit_error ("Terminal not powerful enough for SLsmg"); - - tt_normal_video = tt->tt_normal_video; - tt_goto_rc = tt->tt_goto_rc; - tt_cls = tt->tt_cls; - tt_del_eol = tt->tt_del_eol; - tt_smart_puts = tt->tt_smart_puts; - tt_flush_output = tt->tt_flush_output; - tt_reset_video = tt->tt_reset_video; - tt_init_video = tt->tt_init_video; - -#ifndef IBMPC_SYSTEM - tt_set_scroll_region = tt->tt_set_scroll_region; - tt_reverse_index = tt->tt_reverse_index; - tt_reset_scroll_region = tt->tt_reset_scroll_region; - tt_delete_nlines = tt->tt_delete_nlines; - - tt_Term_Cannot_Scroll = tt->tt_term_cannot_scroll; - tt_Has_Alt_Charset = tt->tt_has_alt_charset; - tt_Use_Blink_For_ACS = tt->tt_use_blink_for_acs; - tt_Graphics_Char_Pairs = tt->tt_graphic_char_pairs; -#endif - - tt_Screen_Cols = tt->tt_screen_cols; - tt_Screen_Rows = tt->tt_screen_rows; -} - |