150276Speter/**************************************************************************** 2178866Srafan * Copyright (c) 1998-2007,2008 Free Software Foundation, Inc. * 350276Speter * * 450276Speter * Permission is hereby granted, free of charge, to any person obtaining a * 550276Speter * copy of this software and associated documentation files (the * 650276Speter * "Software"), to deal in the Software without restriction, including * 750276Speter * without limitation the rights to use, copy, modify, merge, publish, * 850276Speter * distribute, distribute with modifications, sublicense, and/or sell * 950276Speter * copies of the Software, and to permit persons to whom the Software is * 1050276Speter * furnished to do so, subject to the following conditions: * 1150276Speter * * 1250276Speter * The above copyright notice and this permission notice shall be included * 1350276Speter * in all copies or substantial portions of the Software. * 1450276Speter * * 1550276Speter * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS * 1650276Speter * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF * 1750276Speter * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. * 1850276Speter * IN NO EVENT SHALL THE ABOVE COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, * 1950276Speter * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR * 2050276Speter * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR * 2150276Speter * THE USE OR OTHER DEALINGS IN THE SOFTWARE. * 2250276Speter * * 2350276Speter * Except as contained in this notice, the name(s) of the above copyright * 2450276Speter * holders shall not be used in advertising or otherwise to promote the * 2550276Speter * sale, use or other dealings in this Software without prior written * 2650276Speter * authorization. * 2750276Speter ****************************************************************************/ 2850276Speter 2950276Speter/**************************************************************************** 3050276Speter * Author: Zeyd M. Ben-Halim <zmbenhal@netcom.com> 1992,1995 * 3150276Speter * and: Eric S. Raymond <esr@snark.thyrsus.com> * 32166124Srafan * and: Thomas E. Dickey 1996-on * 3350276Speter ****************************************************************************/ 3450276Speter 3550276Speter/*----------------------------------------------------------------- 3650276Speter * 3750276Speter * lib_doupdate.c 3850276Speter * 39166124Srafan * The routine doupdate() and its dependents. 40166124Srafan * All physical output is concentrated here (except _nc_outch() 41166124Srafan * in lib_tputs.c). 4250276Speter * 4350276Speter *-----------------------------------------------------------------*/ 4450276Speter 4597049Speter#include <curses.priv.h> 4697049Speter 47184989Srafan#if defined __HAIKU__ && defined __BEOS__ 48184989Srafan#undef __BEOS__ 49184989Srafan#endif 50184989Srafan 5156639Speter#ifdef __BEOS__ 5297049Speter#undef false 5397049Speter#undef true 5456639Speter#include <OS.h> 5556639Speter#endif 5656639Speter 5750276Speter#if defined(TRACE) && HAVE_SYS_TIMES_H && HAVE_TIMES 5850276Speter#define USE_TRACE_TIMES 1 5950276Speter#else 6050276Speter#define USE_TRACE_TIMES 0 6150276Speter#endif 6250276Speter 6350276Speter#if HAVE_SYS_TIME_H && HAVE_SYS_TIME_SELECT 6450276Speter#include <sys/time.h> 6550276Speter#endif 6650276Speter 6750276Speter#if USE_TRACE_TIMES 6850276Speter#include <sys/times.h> 6950276Speter#endif 7050276Speter 7150276Speter#if USE_FUNC_POLL 7250276Speter#elif HAVE_SELECT 7350276Speter#if HAVE_SYS_SELECT_H 7450276Speter#include <sys/select.h> 7550276Speter#endif 7650276Speter#endif 7750276Speter 78166124Srafan#include <ctype.h> 7950276Speter#include <term.h> 8050276Speter 81184989SrafanMODULE_ID("$Id: tty_update.c,v 1.246 2008/08/30 20:08:19 tom Exp $") 8250276Speter 8350276Speter/* 8450276Speter * This define controls the line-breakout optimization. Every once in a 8550276Speter * while during screen refresh, we want to check for input and abort the 8650276Speter * update if there's some waiting. CHECK_INTERVAL controls the number of 8750276Speter * changed lines to be emitted between input checks. 8850276Speter * 8950276Speter * Note: Input-check-and-abort is no longer done if the screen is being 9050276Speter * updated from scratch. This is a feature, not a bug. 9150276Speter */ 9250276Speter#define CHECK_INTERVAL 5 9350276Speter 9462449Speter#define FILL_BCE() (SP->_coloron && !SP->_default_color && !back_color_erase) 9562449Speter 96166124Srafanstatic const NCURSES_CH_T blankchar = NewChar(BLANK_TEXT); 97166124Srafanstatic NCURSES_CH_T normal = NewChar(BLANK_TEXT); 98166124Srafan 9950276Speter/* 10050276Speter * Enable checking to see if doupdate and friends are tracking the true 10150276Speter * cursor position correctly. NOTE: this is a debugging hack which will 10250276Speter * work ONLY on ANSI-compatible terminals! 10350276Speter */ 10450276Speter/* #define POSITION_DEBUG */ 10550276Speter 106166124Srafanstatic NCURSES_INLINE NCURSES_CH_T ClrBlank(WINDOW *win); 10750276Speterstatic int ClrBottom(int total); 10897049Speterstatic void ClearScreen(NCURSES_CH_T blank); 10962449Speterstatic void ClrUpdate(void); 11062449Speterstatic void DelChar(int count); 11197049Speterstatic void InsStr(NCURSES_CH_T * line, int count); 11262449Speterstatic void TransformLine(int const lineno); 11350276Speter 11450276Speter#ifdef POSITION_DEBUG 11550276Speter/**************************************************************************** 11650276Speter * 11750276Speter * Debugging code. Only works on ANSI-standard terminals. 11850276Speter * 11950276Speter ****************************************************************************/ 12050276Speter 12162449Speterstatic void 12262449Speterposition_check(int expected_y, int expected_x, char *legend) 12350276Speter/* check to see if the real cursor position matches the virtual */ 12450276Speter{ 12562449Speter char buf[20]; 12666963Speter char *s; 12750276Speter int y, x; 12850276Speter 12956639Speter if (!_nc_tracing || (expected_y < 0 && expected_x < 0)) 13050276Speter return; 13150276Speter 13266963Speter _nc_flush(); 13350276Speter memset(buf, '\0', sizeof(buf)); 13462449Speter putp("\033[6n"); /* only works on ANSI-compatibles */ 13556639Speter _nc_flush(); 13666963Speter *(s = buf) = 0; 13766963Speter do { 13866963Speter int ask = sizeof(buf) - 1 - (s - buf); 13966963Speter int got = read(0, s, ask); 14066963Speter if (got == 0) 14166963Speter break; 14266963Speter s += got; 14366963Speter } while (strchr(buf, 'R') == 0); 14450276Speter _tracef("probe returned %s", _nc_visbuf(buf)); 14550276Speter 14650276Speter /* try to interpret as a position report */ 14756639Speter if (sscanf(buf, "\033[%d;%dR", &y, &x) != 2) { 14850276Speter _tracef("position probe failed in %s", legend); 14956639Speter } else { 15056639Speter if (expected_x < 0) 15156639Speter expected_x = x - 1; 15256639Speter if (expected_y < 0) 15356639Speter expected_y = y - 1; 15456639Speter if (y - 1 != expected_y || x - 1 != expected_x) { 15556639Speter beep(); 15666963Speter tputs(tparm("\033[%d;%dH", expected_y + 1, expected_x + 1), 1, _nc_outch); 15756639Speter _tracef("position seen (%d, %d) doesn't match expected one (%d, %d) in %s", 15866963Speter y - 1, x - 1, expected_y, expected_x, legend); 15956639Speter } else { 16056639Speter _tracef("position matches OK in %s", legend); 16156639Speter } 16256639Speter } 16350276Speter} 16456639Speter#else 16562449Speter#define position_check(expected_y, expected_x, legend) /* nothing */ 16650276Speter#endif /* POSITION_DEBUG */ 16750276Speter 16850276Speter/**************************************************************************** 16950276Speter * 17050276Speter * Optimized update code 17150276Speter * 17250276Speter ****************************************************************************/ 17350276Speter 174166124Srafanstatic NCURSES_INLINE void 17562449SpeterGoTo(int const row, int const col) 17650276Speter{ 17762449Speter TR(TRACE_MOVE, ("GoTo(%d, %d) from (%d, %d)", 17866963Speter row, col, SP->_cursrow, SP->_curscol)); 17950276Speter 18062449Speter position_check(SP->_cursrow, SP->_curscol, "GoTo"); 18150276Speter 18262449Speter mvcur(SP->_cursrow, SP->_curscol, row, col); 18362449Speter position_check(SP->_cursrow, SP->_curscol, "GoTo2"); 18450276Speter} 18550276Speter 186166124Srafanstatic NCURSES_INLINE void 18797049SpeterPutAttrChar(CARG_CH_T ch) 18850276Speter{ 189166124Srafan int chlen = 1; 190166124Srafan NCURSES_CH_T my_ch; 19197049Speter PUTC_DATA; 19297049Speter NCURSES_CH_T tilde; 193166124Srafan NCURSES_CH_T attr = CHDEREF(ch); 19450276Speter 195166124Srafan TR(TRACE_CHARPUT, ("PutAttrChar(%s) at (%d, %d)", 196166124Srafan _tracech_t(ch), 197166124Srafan SP->_cursrow, SP->_curscol)); 198166124Srafan#if USE_WIDEC_SUPPORT 199166124Srafan /* 200166124Srafan * If this is not a valid character, there is nothing more to do. 201166124Srafan */ 202166124Srafan if (isWidecExt(CHDEREF(ch))) { 203166124Srafan TR(TRACE_CHARPUT, ("...skip")); 204166124Srafan return; 205166124Srafan } 206166124Srafan /* 207166124Srafan * Determine the number of character cells which the 'ch' value will use 208166124Srafan * on the screen. It should be at least one. 209166124Srafan */ 210166124Srafan if ((chlen = wcwidth(CharOf(CHDEREF(ch)))) <= 0) { 211166124Srafan static const NCURSES_CH_T blank = NewChar(BLANK_TEXT); 212166124Srafan 213166124Srafan /* 214166124Srafan * If the character falls into any of these special cases, do 215166124Srafan * not force the result to a blank: 216166124Srafan * 217166124Srafan * a) it is printable (this works around a bug in wcwidth()). 218166124Srafan * b) use_legacy_coding() has been called to modify the treatment 219166124Srafan * of codes 128-255. 220166124Srafan * c) the acs_map[] has been initialized to allow codes 0-31 221166124Srafan * to be rendered. This supports Linux console's "PC" 222166124Srafan * characters. Codes 128-255 are allowed though this is 223166124Srafan * not checked. 224166124Srafan */ 225166124Srafan if (is8bits(CharOf(CHDEREF(ch))) 226166124Srafan && (isprint(CharOf(CHDEREF(ch))) 227166124Srafan || (SP->_legacy_coding > 0 && CharOf(CHDEREF(ch)) >= 160) 228166124Srafan || (SP->_legacy_coding > 1 && CharOf(CHDEREF(ch)) >= 128) 229166124Srafan || (AttrOf(attr) & A_ALTCHARSET 230166124Srafan && ((CharOfD(ch) < ACS_LEN 231166124Srafan && SP->_acs_map != 0 232166124Srafan && SP->_acs_map[CharOfD(ch)] != 0) 233166124Srafan || (CharOfD(ch) >= 128))))) { 234166124Srafan ; 235166124Srafan } else { 236166124Srafan ch = CHREF(blank); 237166124Srafan TR(TRACE_CHARPUT, ("forced to blank")); 238166124Srafan } 239166124Srafan chlen = 1; 240166124Srafan } 241166124Srafan#endif 242166124Srafan 243166124Srafan if ((AttrOf(attr) & A_ALTCHARSET) 244166124Srafan && SP->_acs_map != 0 245166124Srafan && CharOfD(ch) < ACS_LEN) { 246166124Srafan my_ch = CHDEREF(ch); /* work around const param */ 247166124Srafan#if USE_WIDEC_SUPPORT 248166124Srafan /* 249166124Srafan * This is crude & ugly, but works most of the time. It checks if the 250166124Srafan * acs_chars string specified that we have a mapping for this 251166124Srafan * character, and uses the wide-character mapping when we expect the 252166124Srafan * normal one to be broken (by mis-design ;-). 253166124Srafan */ 254166124Srafan if (SP->_screen_acs_fix 255166124Srafan && SP->_screen_acs_map[CharOf(my_ch)]) { 256166124Srafan RemAttr(attr, A_ALTCHARSET); 257166124Srafan my_ch = _nc_wacs[CharOf(my_ch)]; 258166124Srafan } 259166124Srafan#endif 260166124Srafan /* 261166124Srafan * If we (still) have alternate character set, it is the normal 8bit 262166124Srafan * flavor. The _screen_acs_map[] array tells if the character was 263166124Srafan * really in acs_chars, needed because of the way wide/normal line 264166124Srafan * drawing flavors are integrated. 265166124Srafan */ 266166124Srafan if (AttrOf(attr) & A_ALTCHARSET) { 267166124Srafan int j = CharOfD(ch); 268166124Srafan chtype temp = UChar(SP->_acs_map[j]); 269166124Srafan 270166124Srafan if (!(SP->_screen_acs_map[j])) { 271166124Srafan RemAttr(attr, A_ALTCHARSET); 272166124Srafan if (temp == 0) 273166124Srafan temp = ' '; 274166124Srafan } 275166124Srafan if (temp != 0) 276166124Srafan SetChar(my_ch, temp, AttrOf(attr)); 277166124Srafan } 278166124Srafan ch = CHREF(my_ch); 279166124Srafan } 28097049Speter if (tilde_glitch && (CharOfD(ch) == L('~'))) { 281166124Srafan SetChar(tilde, L('`'), AttrOf(attr)); 28297049Speter ch = CHREF(tilde); 28397049Speter } 28462449Speter 285166124Srafan UpdateAttrs(attr); 28697049Speter#if !USE_WIDEC_SUPPORT 28797049Speter /* FIXME - we do this special case for signal handling, should see how to 28897049Speter * make it work for wide characters. 28997049Speter */ 29062449Speter if (SP->_outch != 0) { 291166124Srafan SP->_outch(UChar(ch)); 29297049Speter } else 29397049Speter#endif 29497049Speter { 29597049Speter PUTC(CHDEREF(ch), SP->_ofp); /* macro's fastest... */ 296174993Srafan COUNT_OUTCHARS(1); 29762449Speter } 298166124Srafan SP->_curscol += chlen; 29962449Speter if (char_padding) { 30062449Speter TPUTS_TRACE("char_padding"); 30162449Speter putp(char_padding); 30262449Speter } 30350276Speter} 30450276Speter 30562449Speterstatic bool 30662449Spetercheck_pending(void) 30750276Speter/* check for pending input */ 30850276Speter{ 30962449Speter bool have_pending = FALSE; 31050276Speter 31162449Speter /* 31262449Speter * Only carry out this check when the flag is zero, otherwise we'll 31362449Speter * have the refreshing slow down drastically (or stop) if there's an 31462449Speter * unread character available. 31562449Speter */ 31662449Speter if (SP->_fifohold != 0) 31762449Speter return FALSE; 31850276Speter 31962449Speter if (SP->_checkfd >= 0) { 32050276Speter#if USE_FUNC_POLL 32162449Speter struct pollfd fds[1]; 32262449Speter fds[0].fd = SP->_checkfd; 32362449Speter fds[0].events = POLLIN; 32462449Speter if (poll(fds, 1, 0) > 0) { 32562449Speter have_pending = TRUE; 32662449Speter } 32756639Speter#elif defined(__BEOS__) 32862449Speter /* 32962449Speter * BeOS's select() is declared in socket.h, so the configure script does 33062449Speter * not see it. That's just as well, since that function works only for 33162449Speter * sockets. This (using snooze and ioctl) was distilled from Be's patch 33262449Speter * for ncurses which uses a separate thread to simulate select(). 33362449Speter * 33462449Speter * FIXME: the return values from the ioctl aren't very clear if we get 33562449Speter * interrupted. 33662449Speter */ 33762449Speter int n = 0; 33862449Speter int howmany = ioctl(0, 'ichr', &n); 33962449Speter if (howmany >= 0 && n > 0) { 34062449Speter have_pending = TRUE; 34162449Speter } 34250276Speter#elif HAVE_SELECT 34362449Speter fd_set fdset; 34462449Speter struct timeval ktimeout; 34550276Speter 34662449Speter ktimeout.tv_sec = 34762449Speter ktimeout.tv_usec = 0; 34850276Speter 34962449Speter FD_ZERO(&fdset); 35062449Speter FD_SET(SP->_checkfd, &fdset); 35162449Speter if (select(SP->_checkfd + 1, &fdset, NULL, NULL, &ktimeout) != 0) { 35262449Speter have_pending = TRUE; 35362449Speter } 35450276Speter#endif 35562449Speter } 35662449Speter if (have_pending) { 35762449Speter SP->_fifohold = 5; 35862449Speter _nc_flush(); 35962449Speter } 36062449Speter return FALSE; 36150276Speter} 36250276Speter 36350276Speter/* put char at lower right corner */ 36462449Speterstatic void 36597049SpeterPutCharLR(const ARG_CH_T ch) 36650276Speter{ 36762449Speter if (!auto_right_margin) { 36850276Speter /* we can put the char directly */ 36950276Speter PutAttrChar(ch); 37062449Speter } else if (enter_am_mode && exit_am_mode) { 37150276Speter /* we can suppress automargin */ 37250276Speter TPUTS_TRACE("exit_am_mode"); 37350276Speter putp(exit_am_mode); 37450276Speter 37550276Speter PutAttrChar(ch); 37656639Speter SP->_curscol--; 37756639Speter position_check(SP->_cursrow, SP->_curscol, "exit_am_mode"); 37850276Speter 37950276Speter TPUTS_TRACE("enter_am_mode"); 38050276Speter putp(enter_am_mode); 38162449Speter } else if ((enter_insert_mode && exit_insert_mode) 38266963Speter || insert_character || parm_ich) { 38362449Speter GoTo(screen_lines - 1, screen_columns - 2); 38476726Speter PutAttrChar(ch); 38562449Speter GoTo(screen_lines - 1, screen_columns - 2); 38662449Speter InsStr(newscr->_line[screen_lines - 1].text + screen_columns - 2, 1); 38750276Speter } 38850276Speter} 38950276Speter 390166124Srafan/* 391166124Srafan * Wrap the cursor position, i.e., advance to the beginning of the next line. 392166124Srafan */ 39362449Speterstatic void 39462449Speterwrap_cursor(void) 39550276Speter{ 39662449Speter if (eat_newline_glitch) { 39750276Speter /* 398166124Srafan * xenl can manifest two different ways. The vt100 way is that, when 399166124Srafan * you'd expect the cursor to wrap, it stays hung at the right margin 400166124Srafan * (on top of the character just emitted) and doesn't wrap until the 401166124Srafan * *next* graphic char is emitted. The c100 way is to ignore LF 402166124Srafan * received just after an am wrap. 40350276Speter * 404166124Srafan * An aggressive way to handle this would be to emit CR/LF after the 405166124Srafan * char and then assume the wrap is done, you're on the first position 406166124Srafan * of the next line, and the terminal out of its weird state. Here 407166124Srafan * it's safe to just tell the code that the cursor is in hyperspace and 408166124Srafan * let the next mvcur() call straighten things out. 40950276Speter */ 41050276Speter SP->_curscol = -1; 41150276Speter SP->_cursrow = -1; 41262449Speter } else if (auto_right_margin) { 41350276Speter SP->_curscol = 0; 41450276Speter SP->_cursrow++; 415166124Srafan /* 416166124Srafan * We've actually moved - but may have to work around problems with 417166124Srafan * video attributes not working. 418166124Srafan */ 419166124Srafan if (!move_standout_mode && AttrOf(SCREEN_ATTRS(SP))) { 420166124Srafan TR(TRACE_CHARPUT, ("turning off (%#lx) %s before wrapping", 421166124Srafan (unsigned long) AttrOf(SCREEN_ATTRS(SP)), 422166124Srafan _traceattr(AttrOf(SCREEN_ATTRS(SP))))); 423166124Srafan (void) VIDATTR(A_NORMAL, 0); 424166124Srafan } 42562449Speter } else { 42650276Speter SP->_curscol--; 42750276Speter } 42856639Speter position_check(SP->_cursrow, SP->_curscol, "wrap_cursor"); 42950276Speter} 43050276Speter 431166124Srafanstatic NCURSES_INLINE void 43297049SpeterPutChar(const ARG_CH_T ch) 43350276Speter/* insert character, handling automargin stuff */ 43450276Speter{ 43562449Speter if (SP->_cursrow == screen_lines - 1 && SP->_curscol == screen_columns - 1) 43650276Speter PutCharLR(ch); 43750276Speter else 43850276Speter PutAttrChar(ch); 43950276Speter 44050276Speter if (SP->_curscol >= screen_columns) 44150276Speter wrap_cursor(); 44250276Speter 44350276Speter position_check(SP->_cursrow, SP->_curscol, "PutChar"); 44450276Speter} 44550276Speter 44650276Speter/* 44762449Speter * Check whether the given character can be output by clearing commands. This 44862449Speter * includes test for being a space and not including any 'bad' attributes, such 44962449Speter * as A_REVERSE. All attribute flags which don't affect appearance of a space 45062449Speter * or can be output by clearing (A_COLOR in case of bce-terminal) are excluded. 45162449Speter */ 452166124Srafanstatic NCURSES_INLINE bool 45397049Spetercan_clear_with(ARG_CH_T ch) 45462449Speter{ 45562449Speter if (!back_color_erase && SP->_coloron) { 45666963Speter#if NCURSES_EXT_FUNCS 457166124Srafan int pair; 458166124Srafan 45962449Speter if (!SP->_default_color) 46062449Speter return FALSE; 46162449Speter if (SP->_default_fg != C_MASK || SP->_default_bg != C_MASK) 46262449Speter return FALSE; 463166124Srafan if ((pair = GetPair(CHDEREF(ch))) != 0) { 46497049Speter short fg, bg; 465166124Srafan pair_content(pair, &fg, &bg); 46697049Speter if (fg != C_MASK || bg != C_MASK) 46797049Speter return FALSE; 46897049Speter } 46997049Speter#else 47097049Speter if (AttrOfD(ch) & A_COLOR) 47197049Speter return FALSE; 47262449Speter#endif 47362449Speter } 47497049Speter return (ISBLANK(CHDEREF(ch)) && 47597049Speter (AttrOfD(ch) & ~(NONBLANK_ATTR | A_COLOR)) == BLANK_ATTR); 47662449Speter} 47762449Speter 47862449Speter/* 47950276Speter * Issue a given span of characters from an array. 48050276Speter * Must be functionally equivalent to: 48150276Speter * for (i = 0; i < num; i++) 48250276Speter * PutChar(ntext[i]); 48350276Speter * but can leave the cursor positioned at the middle of the interval. 48450276Speter * 48550276Speter * Returns: 0 - cursor is at the end of interval 48650276Speter * 1 - cursor is somewhere in the middle 48750276Speter * 48850276Speter * This code is optimized using ech and rep. 48950276Speter */ 49062449Speterstatic int 49197049SpeterEmitRange(const NCURSES_CH_T * ntext, int num) 49250276Speter{ 49362449Speter int i; 49450276Speter 495166124Srafan TR(TRACE_CHARPUT, ("EmitRange %d:%s", num, _nc_viscbuf(ntext, num))); 496166124Srafan 49762449Speter if (erase_chars || repeat_char) { 49862449Speter while (num > 0) { 49962449Speter int runcount; 50097049Speter NCURSES_CH_T ntext0; 50150276Speter 50297049Speter while (num > 1 && !CharEq(ntext[0], ntext[1])) { 50397049Speter PutChar(CHREF(ntext[0])); 50450276Speter ntext++; 50550276Speter num--; 50650276Speter } 50750276Speter ntext0 = ntext[0]; 50862449Speter if (num == 1) { 50997049Speter PutChar(CHREF(ntext0)); 51050276Speter return 0; 51150276Speter } 51250276Speter runcount = 2; 51350276Speter 51497049Speter while (runcount < num && CharEq(ntext[runcount], ntext0)) 51550276Speter runcount++; 51650276Speter 51750276Speter /* 51850276Speter * The cost expression in the middle isn't exactly right. 51962449Speter * _cup_ch_cost is an upper bound on the cost for moving to the 52050276Speter * end of the erased area, but not the cost itself (which we 52150276Speter * can't compute without emitting the move). This may result 52250276Speter * in erase_chars not getting used in some situations for 52350276Speter * which it would be marginally advantageous. 52450276Speter */ 52550276Speter if (erase_chars 52662449Speter && runcount > SP->_ech_cost + SP->_cup_ch_cost 52797049Speter && can_clear_with(CHREF(ntext0))) { 528166124Srafan UpdateAttrs(ntext0); 529166124Srafan putp(TPARM_1(erase_chars, runcount)); 53050276Speter 53150276Speter /* 53250276Speter * If this is the last part of the given interval, 53350276Speter * don't bother moving cursor, since it can be the 53450276Speter * last update on the line. 53550276Speter */ 53666963Speter if (runcount < num) { 53750276Speter GoTo(SP->_cursrow, SP->_curscol + runcount); 53866963Speter } else { 53950276Speter return 1; /* cursor stays in the middle */ 54066963Speter } 54162449Speter } else if (repeat_char && runcount > SP->_rep_cost) { 54250276Speter bool wrap_possible = (SP->_curscol + runcount >= screen_columns); 54350276Speter int rep_count = runcount; 54450276Speter 54550276Speter if (wrap_possible) 54650276Speter rep_count--; 54750276Speter 548166124Srafan UpdateAttrs(ntext0); 549166124Srafan tputs(TPARM_2(repeat_char, CharOf(ntext0), rep_count), 550166124Srafan rep_count, _nc_outch); 55150276Speter SP->_curscol += rep_count; 55250276Speter 55350276Speter if (wrap_possible) 55497049Speter PutChar(CHREF(ntext0)); 55562449Speter } else { 55650276Speter for (i = 0; i < runcount; i++) 55797049Speter PutChar(CHREF(ntext[i])); 55850276Speter } 55950276Speter ntext += runcount; 56050276Speter num -= runcount; 56150276Speter } 56250276Speter return 0; 56350276Speter } 56450276Speter 56550276Speter for (i = 0; i < num; i++) 56697049Speter PutChar(CHREF(ntext[i])); 56750276Speter return 0; 56850276Speter} 56950276Speter 57050276Speter/* 57150276Speter * Output the line in the given range [first .. last] 57250276Speter * 57350276Speter * If there's a run of identical characters that's long enough to justify 57450276Speter * cursor movement, use that also. 57550276Speter * 57650276Speter * Returns: same as EmitRange 57750276Speter */ 57862449Speterstatic int 579166124SrafanPutRange(const NCURSES_CH_T * otext, 580166124Srafan const NCURSES_CH_T * ntext, 581166124Srafan int row, 582166124Srafan int first, int last) 58350276Speter{ 584166124Srafan int i, j, same; 58550276Speter 58662449Speter TR(TRACE_CHARPUT, ("PutRange(%p, %p, %d, %d, %d)", 58766963Speter otext, ntext, row, first, last)); 58850276Speter 58962449Speter if (otext != ntext 59062449Speter && (last - first + 1) > SP->_inline_cost) { 591166124Srafan for (j = first, same = 0; j <= last; j++) { 592166124Srafan if (!same && isWidecExt(otext[j])) 59397049Speter continue; 59497049Speter if (CharEq(otext[j], ntext[j])) { 595166124Srafan same++; 59662449Speter } else { 597166124Srafan if (same > SP->_inline_cost) { 598166124Srafan EmitRange(ntext + first, j - same - first); 59962449Speter GoTo(row, first = j); 60050276Speter } 601166124Srafan same = 0; 60262449Speter } 60350276Speter } 604166124Srafan i = EmitRange(ntext + first, j - same - first); 605166124Srafan /* 606166124Srafan * Always return 1 for the next GoTo() after a PutRange() if we found 607166124Srafan * identical characters at end of interval 608166124Srafan */ 609166124Srafan return (same == 0 ? i : 1); 61062449Speter } 61162449Speter return EmitRange(ntext + first, last - first + 1); 61250276Speter} 61350276Speter 61462449Speter/* leave unbracketed here so 'indent' works */ 61550276Speter#define MARK_NOCHANGE(win,row) \ 61650276Speter win->_line[row].firstchar = _NOCHANGE; \ 61750276Speter win->_line[row].lastchar = _NOCHANGE; \ 61862449Speter if_USE_SCROLL_HINTS(win->_line[row].oldindex = row) 61950276Speter 62076726SpeterNCURSES_EXPORT(int) 62162449Speterdoupdate(void) 62250276Speter{ 62362449Speter int i; 62462449Speter int nonempty; 62550276Speter#if USE_TRACE_TIMES 62662449Speter struct tms before, after; 62750276Speter#endif /* USE_TRACE_TIMES */ 62850276Speter 62962449Speter T((T_CALLED("doupdate()"))); 63050276Speter 631174993Srafan if (curscr == 0 632174993Srafan || newscr == 0) 633174993Srafan returnCode(ERR); 634174993Srafan 63550276Speter#ifdef TRACE 636174993Srafan if (USE_TRACEF(TRACE_UPDATE)) { 63762449Speter if (curscr->_clear) 63862449Speter _tracef("curscr is clear"); 63962449Speter else 64062449Speter _tracedump("curscr", curscr); 64162449Speter _tracedump("newscr", newscr); 642174993Srafan _nc_unlock_global(tracef); 64362449Speter } 64450276Speter#endif /* TRACE */ 64550276Speter 64662449Speter _nc_signal_handler(FALSE); 64750276Speter 64862449Speter if (SP->_fifohold) 64962449Speter SP->_fifohold--; 65050276Speter 65150276Speter#if USE_SIZECHANGE 652178866Srafan if (SP->_endwin || _nc_handle_sigwinch(SP)) { 65362449Speter /* 65462449Speter * This is a transparent extension: XSI does not address it, 65562449Speter * and applications need not know that ncurses can do it. 65662449Speter * 65762449Speter * Check if the terminal size has changed while curses was off 65862449Speter * (this can happen in an xterm, for example), and resize the 65962449Speter * ncurses data structures accordingly. 66062449Speter */ 661178866Srafan _nc_update_screensize(SP); 66262449Speter } 66350276Speter#endif 66450276Speter 66562449Speter if (SP->_endwin) { 66650276Speter 66762449Speter T(("coming back from shell mode")); 66862449Speter reset_prog_mode(); 66950276Speter 67062449Speter _nc_mvcur_resume(); 67162449Speter _nc_screen_resume(); 67262449Speter SP->_mouse_resume(SP); 67350276Speter 67462449Speter SP->_endwin = FALSE; 67562449Speter } 67650276Speter#if USE_TRACE_TIMES 67762449Speter /* zero the metering machinery */ 678174993Srafan RESET_OUTCHARS(); 67962449Speter (void) times(&before); 68050276Speter#endif /* USE_TRACE_TIMES */ 68150276Speter 68262449Speter /* 683166124Srafan * This is the support for magic-cookie terminals. The theory: we scan 684166124Srafan * the virtual screen looking for attribute turnons. Where we find one, 685166124Srafan * check to make sure it's realizable by seeing if the required number of 686166124Srafan * un-attributed blanks are present before and after the attributed range; 687166124Srafan * try to shift the range boundaries over blanks (not changing the screen 688166124Srafan * display) so this becomes true. If it is, shift the beginning attribute 689166124Srafan * change appropriately (the end one, if we've gotten this far, is 690166124Srafan * guaranteed room for its cookie). If not, nuke the added attributes out 691166124Srafan * of the span. 69262449Speter */ 69350276Speter#if USE_XMC_SUPPORT 69462449Speter if (magic_cookie_glitch > 0) { 69562449Speter int j, k; 69662449Speter attr_t rattr = A_NORMAL; 69750276Speter 69862449Speter for (i = 0; i < screen_lines; i++) { 69962449Speter for (j = 0; j < screen_columns; j++) { 70062449Speter bool failed = FALSE; 701166124Srafan NCURSES_CH_T *thisline = newscr->_line[i].text; 702166124Srafan attr_t thisattr = AttrOf(thisline[j]) & SP->_xmc_triggers; 703166124Srafan attr_t turnon = thisattr & ~rattr; 70450276Speter 70562449Speter /* is an attribute turned on here? */ 70662449Speter if (turnon == 0) { 707166124Srafan rattr = thisattr; 70862449Speter continue; 70962449Speter } 71050276Speter 71166963Speter TR(TRACE_ATTRS, ("At (%d, %d): from %s...", i, j, _traceattr(rattr))); 71266963Speter TR(TRACE_ATTRS, ("...to %s", _traceattr(turnon))); 71350276Speter 71462449Speter /* 715166124Srafan * If the attribute change location is a blank with a "safe" 716166124Srafan * attribute, undo the attribute turnon. This may ensure 717166124Srafan * there's enough room to set the attribute before the first 718166124Srafan * non-blank in the run. 71962449Speter */ 720166124Srafan#define SAFE(a) (!((a) & SP->_xmc_triggers)) 721166124Srafan if (ISBLANK(thisline[j]) && SAFE(turnon)) { 722166124Srafan RemAttr(thisline[j], turnon); 72362449Speter continue; 72462449Speter } 72550276Speter 72662449Speter /* check that there's enough room at start of span */ 72762449Speter for (k = 1; k <= magic_cookie_glitch; k++) { 72862449Speter if (j - k < 0 729166124Srafan || !ISBLANK(thisline[j - k]) 730166124Srafan || !SAFE(AttrOf(thisline[j - k]))) { 73162449Speter failed = TRUE; 732166124Srafan TR(TRACE_ATTRS, ("No room at start in %d,%d%s%s", 733166124Srafan i, j - k, 734166124Srafan (ISBLANK(thisline[j - k]) 735166124Srafan ? "" 736166124Srafan : ":nonblank"), 737166124Srafan (SAFE(AttrOf(thisline[j - k])) 738166124Srafan ? "" 739166124Srafan : ":unsafe"))); 740166124Srafan break; 741166124Srafan } 74262449Speter } 74362449Speter if (!failed) { 74462449Speter bool end_onscreen = FALSE; 74562449Speter int m, n = j; 74650276Speter 74762449Speter /* find end of span, if it's onscreen */ 74862449Speter for (m = i; m < screen_lines; m++) { 74962449Speter for (; n < screen_columns; n++) { 750166124Srafan attr_t testattr = AttrOf(newscr->_line[m].text[n]); 751166124Srafan if ((testattr & SP->_xmc_triggers) == rattr) { 75262449Speter end_onscreen = TRUE; 75366963Speter TR(TRACE_ATTRS, 75466963Speter ("Range attributed with %s ends at (%d, %d)", 75566963Speter _traceattr(turnon), m, n)); 75662449Speter goto foundit; 75750276Speter } 75850276Speter } 75962449Speter n = 0; 76062449Speter } 76166963Speter TR(TRACE_ATTRS, 76266963Speter ("Range attributed with %s ends offscreen", 76366963Speter _traceattr(turnon))); 76462449Speter foundit:; 76550276Speter 76662449Speter if (end_onscreen) { 76797049Speter NCURSES_CH_T *lastline = newscr->_line[m].text; 76850276Speter 76962449Speter /* 770166124Srafan * If there are safely-attributed blanks at the end of 771166124Srafan * the range, shorten the range. This will help ensure 772166124Srafan * that there is enough room at end of span. 77362449Speter */ 77462449Speter while (n >= 0 77597049Speter && ISBLANK(lastline[n]) 776166124Srafan && SAFE(AttrOf(lastline[n]))) { 77797049Speter RemAttr(lastline[n--], turnon); 778166124Srafan } 77950276Speter 78062449Speter /* check that there's enough room at end of span */ 781166124Srafan for (k = 1; k <= magic_cookie_glitch; k++) { 78262449Speter if (n + k >= screen_columns 78397049Speter || !ISBLANK(lastline[n + k]) 784166124Srafan || !SAFE(AttrOf(lastline[n + k]))) { 78562449Speter failed = TRUE; 786166124Srafan TR(TRACE_ATTRS, 787166124Srafan ("No room at end in %d,%d%s%s", 788166124Srafan i, j - k, 789166124Srafan (ISBLANK(lastline[n + k]) 790166124Srafan ? "" 791166124Srafan : ":nonblank"), 792166124Srafan (SAFE(AttrOf(lastline[n + k])) 793166124Srafan ? "" 794166124Srafan : ":unsafe"))); 795166124Srafan break; 796166124Srafan } 797166124Srafan } 79850276Speter } 79962449Speter } 80050276Speter 80162449Speter if (failed) { 80262449Speter int p, q = j; 80350276Speter 80466963Speter TR(TRACE_ATTRS, 80566963Speter ("Clearing %s beginning at (%d, %d)", 80666963Speter _traceattr(turnon), i, j)); 80750276Speter 80862449Speter /* turn off new attributes over span */ 80962449Speter for (p = i; p < screen_lines; p++) { 81062449Speter for (; q < screen_columns; q++) { 811166124Srafan attr_t testattr = AttrOf(newscr->_line[p].text[q]); 812166124Srafan if ((testattr & SP->_xmc_triggers) == rattr) 81362449Speter goto foundend; 81497049Speter RemAttr(newscr->_line[p].text[q], turnon); 81550276Speter } 81662449Speter q = 0; 81750276Speter } 81862449Speter foundend:; 81962449Speter } else { 82066963Speter TR(TRACE_ATTRS, 82166963Speter ("Cookie space for %s found before (%d, %d)", 82266963Speter _traceattr(turnon), i, j)); 82350276Speter 82462449Speter /* 825166124Srafan * Back up the start of range so there's room for cookies 826166124Srafan * before the first nonblank character. 82762449Speter */ 82862449Speter for (k = 1; k <= magic_cookie_glitch; k++) 829166124Srafan AddAttr(thisline[j - k], turnon); 83050276Speter } 83150276Speter 832166124Srafan rattr = thisattr; 83350276Speter } 83450276Speter } 83550276Speter 83662449Speter#ifdef TRACE 83762449Speter /* show altered highlights after magic-cookie check */ 838174993Srafan if (USE_TRACEF(TRACE_UPDATE)) { 83962449Speter _tracef("After magic-cookie check..."); 84062449Speter _tracedump("newscr", newscr); 841174993Srafan _nc_unlock_global(tracef); 84262449Speter } 84362449Speter#endif /* TRACE */ 84462449Speter } 84562449Speter#endif /* USE_XMC_SUPPORT */ 84650276Speter 84762449Speter nonempty = 0; 84862449Speter if (curscr->_clear || newscr->_clear) { /* force refresh ? */ 84962449Speter ClrUpdate(); 85062449Speter curscr->_clear = FALSE; /* reset flag */ 85162449Speter newscr->_clear = FALSE; /* reset flag */ 85262449Speter } else { 85362449Speter int changedlines = CHECK_INTERVAL; 85450276Speter 85562449Speter if (check_pending()) 85662449Speter goto cleanup; 85750276Speter 85862449Speter nonempty = min(screen_lines, newscr->_maxy + 1); 85950276Speter 86062449Speter if (SP->_scrolling) { 86162449Speter _nc_scroll_optimize(); 86262449Speter } 86350276Speter 86462449Speter nonempty = ClrBottom(nonempty); 86550276Speter 86666963Speter TR(TRACE_UPDATE, ("Transforming lines, nonempty %d", nonempty)); 86762449Speter for (i = 0; i < nonempty; i++) { 86862449Speter /* 86962449Speter * Here is our line-breakout optimization. 87062449Speter */ 87162449Speter if (changedlines == CHECK_INTERVAL) { 87262449Speter if (check_pending()) 87362449Speter goto cleanup; 87462449Speter changedlines = 0; 87562449Speter } 87650276Speter 87762449Speter /* 87862449Speter * newscr->line[i].firstchar is normally set 87962449Speter * by wnoutrefresh. curscr->line[i].firstchar 88062449Speter * is normally set by _nc_scroll_window in the 88162449Speter * vertical-movement optimization code, 88262449Speter */ 88362449Speter if (newscr->_line[i].firstchar != _NOCHANGE 88462449Speter || curscr->_line[i].firstchar != _NOCHANGE) { 88562449Speter TransformLine(i); 88662449Speter changedlines++; 88762449Speter } 88862449Speter 88962449Speter /* mark line changed successfully */ 89062449Speter if (i <= newscr->_maxy) { 89176726Speter MARK_NOCHANGE(newscr, i); 89262449Speter } 89362449Speter if (i <= curscr->_maxy) { 89476726Speter MARK_NOCHANGE(curscr, i); 89562449Speter } 89650276Speter } 89762449Speter } 89850276Speter 89962449Speter /* put everything back in sync */ 90062449Speter for (i = nonempty; i <= newscr->_maxy; i++) { 90176726Speter MARK_NOCHANGE(newscr, i); 90262449Speter } 90362449Speter for (i = nonempty; i <= curscr->_maxy; i++) { 90476726Speter MARK_NOCHANGE(curscr, i); 90562449Speter } 90650276Speter 90762449Speter if (!newscr->_leaveok) { 90862449Speter curscr->_curx = newscr->_curx; 90962449Speter curscr->_cury = newscr->_cury; 91050276Speter 91162449Speter GoTo(curscr->_cury, curscr->_curx); 91262449Speter } 91350276Speter 91462449Speter cleanup: 91562449Speter /* 916166124Srafan * We would like to keep the physical screen in normal mode in case we get 917166124Srafan * other processes writing to the screen. This goal cannot be met for 918166124Srafan * magic cookies since it interferes with attributes that may propagate 919166124Srafan * past the current position. 92062449Speter */ 921166124Srafan#if USE_XMC_SUPPORT 922166124Srafan if (magic_cookie_glitch != 0) 923166124Srafan#endif 924166124Srafan UpdateAttrs(normal); 92550276Speter 92662449Speter _nc_flush(); 927166124Srafan WINDOW_ATTRS(curscr) = WINDOW_ATTRS(newscr); 92850276Speter 92950276Speter#if USE_TRACE_TIMES 93062449Speter (void) times(&after); 93162449Speter TR(TRACE_TIMES, 93266963Speter ("Update cost: %ld chars, %ld clocks system time, %ld clocks user time", 93366963Speter _nc_outchars, 93497049Speter (long) (after.tms_stime - before.tms_stime), 93597049Speter (long) (after.tms_utime - before.tms_utime))); 93650276Speter#endif /* USE_TRACE_TIMES */ 93750276Speter 93862449Speter _nc_signal_handler(TRUE); 93950276Speter 94062449Speter returnCode(OK); 94150276Speter} 94250276Speter 94350276Speter/* 94450276Speter * ClrBlank(win) 94550276Speter * 94650276Speter * Returns the attributed character that corresponds to the "cleared" 94750276Speter * screen. If the terminal has the back-color-erase feature, this will be 94850276Speter * colored according to the wbkgd() call. 94950276Speter * 95050276Speter * We treat 'curscr' specially because it isn't supposed to be set directly 95150276Speter * in the wbkgd() call. Assume 'stdscr' for this case. 95250276Speter */ 95350276Speter#define BCE_ATTRS (A_NORMAL|A_COLOR) 95497049Speter#define BCE_BKGD(win) (((win) == curscr ? stdscr : (win))->_nc_bkgd) 95550276Speter 956166124Srafanstatic NCURSES_INLINE NCURSES_CH_T 95762449SpeterClrBlank(WINDOW *win) 95850276Speter{ 959166124Srafan NCURSES_CH_T blank = blankchar; 96062449Speter if (back_color_erase) 96197049Speter AddAttr(blank, (AttrOf(BCE_BKGD(win)) & BCE_ATTRS)); 96262449Speter return blank; 96350276Speter} 96450276Speter 96550276Speter/* 96650276Speter** ClrUpdate() 96750276Speter** 96850276Speter** Update by clearing and redrawing the entire screen. 96950276Speter** 97050276Speter*/ 97150276Speter 97262449Speterstatic void 97362449SpeterClrUpdate(void) 97450276Speter{ 97562449Speter int i; 97697049Speter NCURSES_CH_T blank = ClrBlank(stdscr); 97762449Speter int nonempty = min(screen_lines, newscr->_maxy + 1); 97850276Speter 979174993Srafan TR(TRACE_UPDATE, (T_CALLED("ClrUpdate"))); 98050276Speter 98162449Speter ClearScreen(blank); 98250276Speter 98366963Speter TR(TRACE_UPDATE, ("updating screen from scratch")); 98450276Speter 98562449Speter nonempty = ClrBottom(nonempty); 98650276Speter 98762449Speter for (i = 0; i < nonempty; i++) 98862449Speter TransformLine(i); 989174993Srafan 990174993Srafan TR(TRACE_UPDATE, (T_RETURN(""))); 99150276Speter} 99250276Speter 99350276Speter/* 99450276Speter** ClrToEOL(blank) 99550276Speter** 99650276Speter** Clear to end of current line, starting at the cursor position 99750276Speter*/ 99850276Speter 99962449Speterstatic void 100097049SpeterClrToEOL(NCURSES_CH_T blank, bool needclear) 100150276Speter{ 100262449Speter int j; 100350276Speter 100462449Speter if (curscr != 0 100566963Speter && SP->_cursrow >= 0) { 100662449Speter for (j = SP->_curscol; j < screen_columns; j++) { 100766963Speter if (j >= 0) { 100897049Speter NCURSES_CH_T *cp = &(curscr->_line[SP->_cursrow].text[j]); 100950276Speter 101097049Speter if (!CharEq(*cp, blank)) { 101166963Speter *cp = blank; 101266963Speter needclear = TRUE; 101366963Speter } 101450276Speter } 101550276Speter } 101662449Speter } else { 101762449Speter needclear = TRUE; 101862449Speter } 101950276Speter 102062449Speter if (needclear) { 1021166124Srafan UpdateAttrs(blank); 102262449Speter TPUTS_TRACE("clr_eol"); 1023166124Srafan if (clr_eol && SP->_el_cost <= (screen_columns - SP->_curscol)) { 1024166124Srafan putp(clr_eol); 1025166124Srafan } else { 102662449Speter int count = (screen_columns - SP->_curscol); 102762449Speter while (count-- > 0) 102897049Speter PutChar(CHREF(blank)); 102950276Speter } 103062449Speter } 103150276Speter} 103250276Speter 103350276Speter/* 103450276Speter** ClrToEOS(blank) 103550276Speter** 103650276Speter** Clear to end of screen, starting at the cursor position 103750276Speter*/ 103850276Speter 103962449Speterstatic void 104097049SpeterClrToEOS(NCURSES_CH_T blank) 104150276Speter{ 104262449Speter int row, col; 104350276Speter 104462449Speter row = SP->_cursrow; 104562449Speter col = SP->_curscol; 104662449Speter 1047166124Srafan UpdateAttrs(blank); 104866963Speter TPUTS_TRACE("clr_eos"); 104966963Speter tputs(clr_eos, screen_lines - row, _nc_outch); 105050276Speter 105162449Speter while (col < screen_columns) 105262449Speter curscr->_line[row].text[col++] = blank; 105350276Speter 105462449Speter for (row++; row < screen_lines; row++) { 105562449Speter for (col = 0; col < screen_columns; col++) 105662449Speter curscr->_line[row].text[col] = blank; 105762449Speter } 105850276Speter} 105950276Speter 106050276Speter/* 106150276Speter * ClrBottom(total) 106250276Speter * 106350276Speter * Test if clearing the end of the screen would satisfy part of the 106450276Speter * screen-update. Do this by scanning backwards through the lines in the 106550276Speter * screen, checking if each is blank, and one or more are changed. 106650276Speter */ 106762449Speterstatic int 106862449SpeterClrBottom(int total) 106950276Speter{ 107062449Speter int row; 107166963Speter int col; 107262449Speter int top = total; 107362449Speter int last = min(screen_columns, newscr->_maxx + 1); 1074166124Srafan NCURSES_CH_T blank = newscr->_line[total - 1].text[last - 1]; 107566963Speter bool ok; 107650276Speter 107797049Speter if (clr_eos && can_clear_with(CHREF(blank))) { 107850276Speter 107966963Speter for (row = total - 1; row >= 0; row--) { 108066963Speter for (col = 0, ok = TRUE; ok && col < last; col++) { 108197049Speter ok = (CharEq(newscr->_line[row].text[col], blank)); 108266963Speter } 108366963Speter if (!ok) 108466963Speter break; 108550276Speter 108666963Speter for (col = 0; ok && col < last; col++) { 108797049Speter ok = (CharEq(curscr->_line[row].text[col], blank)); 108866963Speter } 108966963Speter if (!ok) 109066963Speter top = row; 109166963Speter } 109250276Speter 109366963Speter /* don't use clr_eos for just one line if clr_eol available */ 1094166124Srafan if (top < total) { 109566963Speter GoTo(top, 0); 109666963Speter ClrToEOS(blank); 109766963Speter if (SP->oldhash && SP->newhash) { 109866963Speter for (row = top; row < screen_lines; row++) 109966963Speter SP->oldhash[row] = SP->newhash[row]; 110066963Speter } 110150276Speter } 110262449Speter } 1103166124Srafan return top; 110450276Speter} 110550276Speter 110697049Speter#if USE_XMC_SUPPORT 110797049Speter#if USE_WIDEC_SUPPORT 1108166124Srafan#define check_xmc_transition(a, b) \ 1109166124Srafan ((((a)->attr ^ (b)->attr) & ~((a)->attr) & SP->_xmc_triggers) != 0) 111097049Speter#define xmc_turn_on(a,b) check_xmc_transition(&(a), &(b)) 111197049Speter#else 111297049Speter#define xmc_turn_on(a,b) ((((a)^(b)) & ~(a) & SP->_xmc_triggers) != 0) 111397049Speter#endif 111497049Speter 111597049Speter#define xmc_new(r,c) newscr->_line[r].text[c] 111697049Speter#define xmc_turn_off(a,b) xmc_turn_on(b,a) 111797049Speter#endif /* USE_XMC_SUPPORT */ 111897049Speter 111950276Speter/* 112050276Speter** TransformLine(lineno) 112150276Speter** 112250276Speter** Transform the given line in curscr to the one in newscr, using 112350276Speter** Insert/Delete Character if _nc_idcok && has_ic(). 112450276Speter** 112550276Speter** firstChar = position of first different character in line 112650276Speter** oLastChar = position of last different character in old line 112750276Speter** nLastChar = position of last different character in new line 112850276Speter** 112950276Speter** move to firstChar 113050276Speter** overwrite chars up to min(oLastChar, nLastChar) 113150276Speter** if oLastChar < nLastChar 113250276Speter** insert newLine[oLastChar+1..nLastChar] 113350276Speter** else 113450276Speter** delete oLastChar - nLastChar spaces 113550276Speter*/ 113650276Speter 113762449Speterstatic void 113862449SpeterTransformLine(int const lineno) 113950276Speter{ 114062449Speter int firstChar, oLastChar, nLastChar; 114197049Speter NCURSES_CH_T *newLine = newscr->_line[lineno].text; 114297049Speter NCURSES_CH_T *oldLine = curscr->_line[lineno].text; 114362449Speter int n; 114462449Speter bool attrchanged = FALSE; 114550276Speter 1146166124Srafan TR(TRACE_UPDATE, (T_CALLED("TransformLine(%d)"), lineno)); 114750276Speter 114862449Speter /* copy new hash value to old one */ 114962449Speter if (SP->oldhash && SP->newhash) 115062449Speter SP->oldhash[lineno] = SP->newhash[lineno]; 115150276Speter 115262449Speter /* 115362449Speter * If we have colors, there is the possibility of having two color pairs 115462449Speter * that display as the same colors. For instance, Lynx does this. Check 115562449Speter * for this case, and update the old line with the new line's colors when 115662449Speter * they are equivalent. 115762449Speter */ 115862449Speter if (SP->_coloron) { 115962449Speter int oldPair; 116062449Speter int newPair; 116162449Speter 116262449Speter for (n = 0; n < screen_columns; n++) { 116397049Speter if (!CharEq(newLine[n], oldLine[n])) { 1164166124Srafan oldPair = GetPair(oldLine[n]); 1165166124Srafan newPair = GetPair(newLine[n]); 1166166124Srafan if (oldPair != newPair 116762449Speter && unColor(oldLine[n]) == unColor(newLine[n])) { 116862449Speter if (oldPair < COLOR_PAIRS 116962449Speter && newPair < COLOR_PAIRS 117062449Speter && SP->_color_pairs[oldPair] == SP->_color_pairs[newPair]) { 1171166124Srafan SetPair(oldLine[n], GetPair(newLine[n])); 117262449Speter } 117350276Speter } 117462449Speter } 117550276Speter } 117662449Speter } 117750276Speter 117862449Speter if (ceol_standout_glitch && clr_eol) { 117950276Speter firstChar = 0; 118062449Speter while (firstChar < screen_columns) { 1181166124Srafan if (!SameAttrOf(newLine[firstChar], oldLine[firstChar])) { 118262449Speter attrchanged = TRUE; 1183166124Srafan break; 1184166124Srafan } 118562449Speter firstChar++; 118662449Speter } 118762449Speter } 118850276Speter 118962449Speter firstChar = 0; 119062449Speter 119162449Speter if (attrchanged) { /* we may have to disregard the whole line */ 119262449Speter GoTo(lineno, firstChar); 119362449Speter ClrToEOL(ClrBlank(curscr), FALSE); 119462449Speter PutRange(oldLine, newLine, lineno, 0, (screen_columns - 1)); 119550276Speter#if USE_XMC_SUPPORT 119650276Speter 119750276Speter /* 119850276Speter * This is a very simple loop to paint characters which may have the 119950276Speter * magic cookie glitch embedded. It doesn't know much about video 120050276Speter * attributes which are continued from one line to the next. It 120150276Speter * assumes that we have filtered out requests for attribute changes 120250276Speter * that do not get mapped to blank positions. 120350276Speter * 120450276Speter * FIXME: we are not keeping track of where we put the cookies, so this 120550276Speter * will work properly only once, since we may overwrite a cookie in a 120650276Speter * following operation. 120750276Speter */ 120862449Speter } else if (magic_cookie_glitch > 0) { 120962449Speter GoTo(lineno, firstChar); 121062449Speter for (n = 0; n < screen_columns; n++) { 121162449Speter int m = n + magic_cookie_glitch; 121250276Speter 121362449Speter /* check for turn-on: 121462449Speter * If we are writing an attributed blank, where the 121562449Speter * previous cell is not attributed. 121662449Speter */ 121797049Speter if (ISBLANK(newLine[n]) 121862449Speter && ((n > 0 121966963Speter && xmc_turn_on(newLine[n - 1], newLine[n])) 122062449Speter || (n == 0 122162449Speter && lineno > 0 122297049Speter && xmc_turn_on(xmc_new(lineno - 1, screen_columns - 1), 122366963Speter newLine[n])))) { 122462449Speter n = m; 122562449Speter } 122650276Speter 122797049Speter PutChar(CHREF(newLine[n])); 122850276Speter 122962449Speter /* check for turn-off: 123062449Speter * If we are writing an attributed non-blank, where the 123162449Speter * next cell is blank, and not attributed. 123262449Speter */ 123397049Speter if (!ISBLANK(newLine[n]) 123462449Speter && ((n + 1 < screen_columns 123566963Speter && xmc_turn_off(newLine[n], newLine[n + 1])) 123662449Speter || (n + 1 >= screen_columns 123762449Speter && lineno + 1 < screen_lines 123897049Speter && xmc_turn_off(newLine[n], xmc_new(lineno + 1, 0))))) { 123962449Speter n = m; 124062449Speter } 124150276Speter 124262449Speter } 124350276Speter#endif 124462449Speter } else { 124597049Speter NCURSES_CH_T blank; 124650276Speter 124762449Speter /* it may be cheap to clear leading whitespace with clr_bol */ 1248166124Srafan blank = newLine[0]; 1249166124Srafan if (clr_bol && can_clear_with(CHREF(blank))) { 125062449Speter int oFirstChar, nFirstChar; 125150276Speter 125262449Speter for (oFirstChar = 0; oFirstChar < screen_columns; oFirstChar++) 125397049Speter if (!CharEq(oldLine[oFirstChar], blank)) 125462449Speter break; 125562449Speter for (nFirstChar = 0; nFirstChar < screen_columns; nFirstChar++) 125697049Speter if (!CharEq(newLine[nFirstChar], blank)) 125762449Speter break; 125850276Speter 1259166124Srafan if (nFirstChar == oFirstChar) { 1260166124Srafan firstChar = nFirstChar; 1261166124Srafan /* find the first differing character */ 1262166124Srafan while (firstChar < screen_columns 1263166124Srafan && CharEq(newLine[firstChar], oldLine[firstChar])) 1264166124Srafan firstChar++; 1265166124Srafan } else if (oFirstChar > nFirstChar) { 1266166124Srafan firstChar = nFirstChar; 1267166124Srafan } else { /* oFirstChar < nFirstChar */ 1268166124Srafan firstChar = oFirstChar; 1269166124Srafan if (SP->_el1_cost < nFirstChar - oFirstChar) { 1270166124Srafan if (nFirstChar >= screen_columns 1271166124Srafan && SP->_el_cost <= SP->_el1_cost) { 1272166124Srafan GoTo(lineno, 0); 1273166124Srafan UpdateAttrs(blank); 1274166124Srafan TPUTS_TRACE("clr_eol"); 1275166124Srafan putp(clr_eol); 1276166124Srafan } else { 1277166124Srafan GoTo(lineno, nFirstChar - 1); 1278166124Srafan UpdateAttrs(blank); 1279166124Srafan TPUTS_TRACE("clr_bol"); 1280166124Srafan putp(clr_bol); 1281166124Srafan } 1282166124Srafan 1283166124Srafan while (firstChar < nFirstChar) 1284166124Srafan oldLine[firstChar++] = blank; 128562449Speter } 128662449Speter } 1287166124Srafan } else { 1288166124Srafan /* find the first differing character */ 1289166124Srafan while (firstChar < screen_columns 1290166124Srafan && CharEq(newLine[firstChar], oldLine[firstChar])) 1291166124Srafan firstChar++; 129262449Speter } 1293166124Srafan /* if there wasn't one, we're done */ 1294166124Srafan if (firstChar >= screen_columns) { 1295166124Srafan TR(TRACE_UPDATE, (T_RETURN(""))); 1296166124Srafan return; 1297166124Srafan } 129850276Speter 129962449Speter blank = newLine[screen_columns - 1]; 130050276Speter 130197049Speter if (!can_clear_with(CHREF(blank))) { 130262449Speter /* find the last differing character */ 130362449Speter nLastChar = screen_columns - 1; 130450276Speter 130562449Speter while (nLastChar > firstChar 130697049Speter && CharEq(newLine[nLastChar], oldLine[nLastChar])) 130762449Speter nLastChar--; 130850276Speter 130962449Speter if (nLastChar >= firstChar) { 131062449Speter GoTo(lineno, firstChar); 131162449Speter PutRange(oldLine, newLine, lineno, firstChar, nLastChar); 131262449Speter memcpy(oldLine + firstChar, 131366963Speter newLine + firstChar, 131497049Speter (nLastChar - firstChar + 1) * sizeof(NCURSES_CH_T)); 131562449Speter } 1316166124Srafan TR(TRACE_UPDATE, (T_RETURN(""))); 131762449Speter return; 131862449Speter } 131950276Speter 132062449Speter /* find last non-blank character on old line */ 132162449Speter oLastChar = screen_columns - 1; 132297049Speter while (oLastChar > firstChar && CharEq(oldLine[oLastChar], blank)) 132362449Speter oLastChar--; 132450276Speter 132562449Speter /* find last non-blank character on new line */ 132662449Speter nLastChar = screen_columns - 1; 132797049Speter while (nLastChar > firstChar && CharEq(newLine[nLastChar], blank)) 132862449Speter nLastChar--; 132950276Speter 133062449Speter if ((nLastChar == firstChar) 133162449Speter && (SP->_el_cost < (oLastChar - nLastChar))) { 133262449Speter GoTo(lineno, firstChar); 133397049Speter if (!CharEq(newLine[firstChar], blank)) 133497049Speter PutChar(CHREF(newLine[firstChar])); 133562449Speter ClrToEOL(blank, FALSE); 133662449Speter } else if ((nLastChar != oLastChar) 133797049Speter && (!CharEq(newLine[nLastChar], oldLine[oLastChar]) 133866963Speter || !(_nc_idcok && has_ic()))) { 133962449Speter GoTo(lineno, firstChar); 134062449Speter if ((oLastChar - nLastChar) > SP->_el_cost) { 134162449Speter if (PutRange(oldLine, newLine, lineno, firstChar, nLastChar)) 134262449Speter GoTo(lineno, nLastChar + 1); 134362449Speter ClrToEOL(blank, FALSE); 134462449Speter } else { 134562449Speter n = max(nLastChar, oLastChar); 134662449Speter PutRange(oldLine, newLine, lineno, firstChar, n); 134762449Speter } 134862449Speter } else { 134962449Speter int nLastNonblank = nLastChar; 135062449Speter int oLastNonblank = oLastChar; 135162449Speter 135262449Speter /* find the last characters that really differ */ 135397049Speter /* can be -1 if no characters differ */ 135497049Speter while (CharEq(newLine[nLastChar], oldLine[oLastChar])) { 135597049Speter /* don't split a wide char */ 1356166124Srafan if (isWidecExt(newLine[nLastChar]) && 135797049Speter !CharEq(newLine[nLastChar - 1], oldLine[oLastChar - 1])) 135862449Speter break; 135997049Speter nLastChar--; 136097049Speter oLastChar--; 136197049Speter if (nLastChar == -1 || oLastChar == -1) 136297049Speter break; 136362449Speter } 136450276Speter 136562449Speter n = min(oLastChar, nLastChar); 136662449Speter if (n >= firstChar) { 136762449Speter GoTo(lineno, firstChar); 136862449Speter PutRange(oldLine, newLine, lineno, firstChar, n); 136962449Speter } 137050276Speter 137162449Speter if (oLastChar < nLastChar) { 137262449Speter int m = max(nLastNonblank, oLastNonblank); 1373166124Srafan#if USE_WIDEC_SUPPORT 1374166124Srafan while (isWidecExt(newLine[n + 1]) && n) { 1375166124Srafan --n; 1376166124Srafan --oLastChar; 1377166124Srafan } 1378166124Srafan#endif 137962449Speter GoTo(lineno, n + 1); 1380166124Srafan if ((nLastChar < nLastNonblank) 1381166124Srafan || InsCharCost(nLastChar - oLastChar) > (m - n)) { 138262449Speter PutRange(oldLine, newLine, lineno, n + 1, m); 138362449Speter } else { 138462449Speter InsStr(&newLine[n + 1], nLastChar - oLastChar); 138550276Speter } 138662449Speter } else if (oLastChar > nLastChar) { 138762449Speter GoTo(lineno, n + 1); 138862449Speter if (DelCharCost(oLastChar - nLastChar) 138962449Speter > SP->_el_cost + nLastNonblank - (n + 1)) { 139062449Speter if (PutRange(oldLine, newLine, lineno, 139166963Speter n + 1, nLastNonblank)) 139262449Speter GoTo(lineno, nLastNonblank + 1); 139362449Speter ClrToEOL(blank, FALSE); 139462449Speter } else { 139562449Speter /* 139662449Speter * The delete-char sequence will 139762449Speter * effectively shift in blanks from the 139862449Speter * right margin of the screen. Ensure 139962449Speter * that they are the right color by 140062449Speter * setting the video attributes from 140162449Speter * the last character on the row. 140262449Speter */ 1403166124Srafan UpdateAttrs(blank); 140462449Speter DelChar(oLastChar - nLastChar); 140562449Speter } 140662449Speter } 140750276Speter } 140862449Speter } 140950276Speter 141062449Speter /* update the code's internal representation */ 141162449Speter if (screen_columns > firstChar) 141262449Speter memcpy(oldLine + firstChar, 141366963Speter newLine + firstChar, 141497049Speter (screen_columns - firstChar) * sizeof(NCURSES_CH_T)); 1415166124Srafan TR(TRACE_UPDATE, (T_RETURN(""))); 1416166124Srafan return; 141750276Speter} 141850276Speter 141950276Speter/* 142050276Speter** ClearScreen(blank) 142150276Speter** 142250276Speter** Clear the physical screen and put cursor at home 142350276Speter** 142450276Speter*/ 142550276Speter 142662449Speterstatic void 142797049SpeterClearScreen(NCURSES_CH_T blank) 142850276Speter{ 142962449Speter int i, j; 143062449Speter bool fast_clear = (clear_screen || clr_eos || clr_eol); 143150276Speter 143266963Speter TR(TRACE_UPDATE, ("ClearScreen() called")); 143350276Speter 143466963Speter#if NCURSES_EXT_FUNCS 143562449Speter if (SP->_coloron 143662449Speter && !SP->_default_color) { 1437166124Srafan _nc_do_color(GET_SCREEN_PAIR(SP), 0, FALSE, _nc_outch); 143862449Speter if (!back_color_erase) { 143962449Speter fast_clear = FALSE; 144062449Speter } 144162449Speter } 144262449Speter#endif 144362449Speter 144462449Speter if (fast_clear) { 144550276Speter if (clear_screen) { 1446166124Srafan UpdateAttrs(blank); 144762449Speter TPUTS_TRACE("clear_screen"); 144862449Speter putp(clear_screen); 144962449Speter SP->_cursrow = SP->_curscol = 0; 145062449Speter position_check(SP->_cursrow, SP->_curscol, "ClearScreen"); 145150276Speter } else if (clr_eos) { 145262449Speter SP->_cursrow = SP->_curscol = -1; 145362449Speter GoTo(0, 0); 145450276Speter 1455166124Srafan UpdateAttrs(blank); 145662449Speter TPUTS_TRACE("clr_eos"); 1457166124Srafan tputs(clr_eos, screen_lines, _nc_outch); 145850276Speter } else if (clr_eol) { 145962449Speter SP->_cursrow = SP->_curscol = -1; 146050276Speter 1461166124Srafan UpdateAttrs(blank); 146262449Speter for (i = 0; i < screen_lines; i++) { 146362449Speter GoTo(i, 0); 146462449Speter TPUTS_TRACE("clr_eol"); 146562449Speter putp(clr_eol); 146662449Speter } 146762449Speter GoTo(0, 0); 146850276Speter } 146962449Speter } else { 1470166124Srafan UpdateAttrs(blank); 147150276Speter for (i = 0; i < screen_lines; i++) { 147262449Speter GoTo(i, 0); 147362449Speter for (j = 0; j < screen_columns; j++) 147497049Speter PutChar(CHREF(blank)); 147550276Speter } 147662449Speter GoTo(0, 0); 147762449Speter } 147850276Speter 147962449Speter for (i = 0; i < screen_lines; i++) { 148062449Speter for (j = 0; j < screen_columns; j++) 148162449Speter curscr->_line[i].text[j] = blank; 148262449Speter } 148362449Speter 148466963Speter TR(TRACE_UPDATE, ("screen cleared")); 148550276Speter} 148650276Speter 148750276Speter/* 148850276Speter** InsStr(line, count) 148950276Speter** 149050276Speter** Insert the count characters pointed to by line. 149150276Speter** 149250276Speter*/ 149350276Speter 149462449Speterstatic void 149597049SpeterInsStr(NCURSES_CH_T * line, int count) 149650276Speter{ 149766963Speter TR(TRACE_UPDATE, ("InsStr(%p,%d) called", line, count)); 149850276Speter 149962449Speter /* Prefer parm_ich as it has the smallest cost - no need to shift 150062449Speter * the whole line on each character. */ 150162449Speter /* The order must match that of InsCharCost. */ 150262449Speter if (parm_ich) { 150362449Speter TPUTS_TRACE("parm_ich"); 1504166124Srafan tputs(TPARM_1(parm_ich, count), count, _nc_outch); 150562449Speter while (count) { 150697049Speter PutAttrChar(CHREF(*line)); 150762449Speter line++; 150862449Speter count--; 150950276Speter } 151062449Speter } else if (enter_insert_mode && exit_insert_mode) { 151162449Speter TPUTS_TRACE("enter_insert_mode"); 151262449Speter putp(enter_insert_mode); 151362449Speter while (count) { 151497049Speter PutAttrChar(CHREF(*line)); 151562449Speter if (insert_padding) { 151662449Speter TPUTS_TRACE("insert_padding"); 151762449Speter putp(insert_padding); 151862449Speter } 151962449Speter line++; 152062449Speter count--; 152162449Speter } 152262449Speter TPUTS_TRACE("exit_insert_mode"); 152362449Speter putp(exit_insert_mode); 152462449Speter } else { 152562449Speter while (count) { 152662449Speter TPUTS_TRACE("insert_character"); 152762449Speter putp(insert_character); 152897049Speter PutAttrChar(CHREF(*line)); 152962449Speter if (insert_padding) { 153062449Speter TPUTS_TRACE("insert_padding"); 153162449Speter putp(insert_padding); 153262449Speter } 153362449Speter line++; 153462449Speter count--; 153562449Speter } 153662449Speter } 153762449Speter position_check(SP->_cursrow, SP->_curscol, "InsStr"); 153850276Speter} 153950276Speter 154050276Speter/* 154150276Speter** DelChar(count) 154250276Speter** 154350276Speter** Delete count characters at current position 154450276Speter** 154550276Speter*/ 154650276Speter 154762449Speterstatic void 154862449SpeterDelChar(int count) 154950276Speter{ 155062449Speter int n; 155150276Speter 1552166124Srafan TR(TRACE_UPDATE, ("DelChar(%d) called, position = (%ld,%ld)", 1553166124Srafan count, 1554166124Srafan (long) newscr->_cury, 1555166124Srafan (long) newscr->_curx)); 155662449Speter 155762449Speter if (parm_dch) { 155862449Speter TPUTS_TRACE("parm_dch"); 1559166124Srafan tputs(TPARM_1(parm_dch, count), count, _nc_outch); 156062449Speter } else { 156162449Speter for (n = 0; n < count; n++) { 156262449Speter TPUTS_TRACE("delete_character"); 156362449Speter putp(delete_character); 156450276Speter } 156562449Speter } 156650276Speter} 156750276Speter 156850276Speter/* 156950276Speter * Physical-scrolling support 157050276Speter * 157150276Speter * This code was adapted from Keith Bostic's hardware scrolling 157250276Speter * support for 4.4BSD curses. I (esr) translated it to use terminfo 157350276Speter * capabilities, narrowed the call interface slightly, and cleaned 157450276Speter * up some convoluted tests. I also added support for the memory_above 157550276Speter * memory_below, and non_dest_scroll_region capabilities. 157650276Speter * 157750276Speter * For this code to work, we must have either 157850276Speter * change_scroll_region and scroll forward/reverse commands, or 157950276Speter * insert and delete line capabilities. 158050276Speter * When the scrolling region has been set, the cursor has to 158150276Speter * be at the last line of the region to make the scroll up 158250276Speter * happen, or on the first line of region to scroll down. 158350276Speter * 158450276Speter * This code makes one aesthetic decision in the opposite way from 158550276Speter * BSD curses. BSD curses preferred pairs of il/dl operations 158650276Speter * over scrolls, allegedly because il/dl looked faster. We, on 158750276Speter * the other hand, prefer scrolls because (a) they're just as fast 158850276Speter * on many terminals and (b) using them avoids bouncing an 158950276Speter * unchanged bottom section of the screen up and down, which is 159050276Speter * visually nasty. 159150276Speter * 159250276Speter * (lav): added more cases, used dl/il when bot==maxy and in csr case. 159350276Speter * 159450276Speter * I used assumption that capabilities il/il1/dl/dl1 work inside 159550276Speter * changed scroll region not shifting screen contents outside of it. 159650276Speter * If there are any terminals behaving different way, it would be 159750276Speter * necessary to add some conditions to scroll_csr_forward/backward. 159850276Speter */ 159950276Speter 160050276Speter/* Try to scroll up assuming given csr (miny, maxy). Returns ERR on failure */ 160162449Speterstatic int 160297049Speterscroll_csr_forward(int n, int top, int bot, int miny, int maxy, NCURSES_CH_T blank) 160350276Speter{ 1604166124Srafan int i; 160550276Speter 160662449Speter if (n == 1 && scroll_forward && top == miny && bot == maxy) { 160750276Speter GoTo(bot, 0); 1608166124Srafan UpdateAttrs(blank); 160950276Speter TPUTS_TRACE("scroll_forward"); 1610166124Srafan putp(scroll_forward); 161162449Speter } else if (n == 1 && delete_line && bot == maxy) { 161250276Speter GoTo(top, 0); 1613166124Srafan UpdateAttrs(blank); 161450276Speter TPUTS_TRACE("delete_line"); 1615166124Srafan putp(delete_line); 161662449Speter } else if (parm_index && top == miny && bot == maxy) { 161750276Speter GoTo(bot, 0); 1618166124Srafan UpdateAttrs(blank); 161950276Speter TPUTS_TRACE("parm_index"); 1620166124Srafan tputs(TPARM_2(parm_index, n, 0), n, _nc_outch); 162162449Speter } else if (parm_delete_line && bot == maxy) { 162250276Speter GoTo(top, 0); 1623166124Srafan UpdateAttrs(blank); 162450276Speter TPUTS_TRACE("parm_delete_line"); 1625166124Srafan tputs(TPARM_2(parm_delete_line, n, 0), n, _nc_outch); 162662449Speter } else if (scroll_forward && top == miny && bot == maxy) { 162750276Speter GoTo(bot, 0); 1628166124Srafan UpdateAttrs(blank); 162962449Speter for (i = 0; i < n; i++) { 163050276Speter TPUTS_TRACE("scroll_forward"); 1631166124Srafan putp(scroll_forward); 163250276Speter } 163362449Speter } else if (delete_line && bot == maxy) { 163450276Speter GoTo(top, 0); 1635166124Srafan UpdateAttrs(blank); 163662449Speter for (i = 0; i < n; i++) { 163750276Speter TPUTS_TRACE("delete_line"); 1638166124Srafan putp(delete_line); 163950276Speter } 164062449Speter } else 164150276Speter return ERR; 164250276Speter 164366963Speter#if NCURSES_EXT_FUNCS 164462449Speter if (FILL_BCE()) { 1645166124Srafan int j; 164662449Speter for (i = 0; i < n; i++) { 164762449Speter GoTo(bot - i, 0); 164862449Speter for (j = 0; j < screen_columns; j++) 164997049Speter PutChar(CHREF(blank)); 165062449Speter } 165162449Speter } 165262449Speter#endif 165350276Speter return OK; 165450276Speter} 165550276Speter 165650276Speter/* Try to scroll down assuming given csr (miny, maxy). Returns ERR on failure */ 165750276Speter/* n > 0 */ 165862449Speterstatic int 165997049Speterscroll_csr_backward(int n, int top, int bot, int miny, int maxy, 166097049Speter NCURSES_CH_T blank) 166150276Speter{ 1662166124Srafan int i; 166350276Speter 166462449Speter if (n == 1 && scroll_reverse && top == miny && bot == maxy) { 166550276Speter GoTo(top, 0); 1666166124Srafan UpdateAttrs(blank); 166750276Speter TPUTS_TRACE("scroll_reverse"); 1668166124Srafan putp(scroll_reverse); 166962449Speter } else if (n == 1 && insert_line && bot == maxy) { 167050276Speter GoTo(top, 0); 1671166124Srafan UpdateAttrs(blank); 167250276Speter TPUTS_TRACE("insert_line"); 1673166124Srafan putp(insert_line); 167462449Speter } else if (parm_rindex && top == miny && bot == maxy) { 167550276Speter GoTo(top, 0); 1676166124Srafan UpdateAttrs(blank); 167750276Speter TPUTS_TRACE("parm_rindex"); 1678166124Srafan tputs(TPARM_2(parm_rindex, n, 0), n, _nc_outch); 167962449Speter } else if (parm_insert_line && bot == maxy) { 168050276Speter GoTo(top, 0); 1681166124Srafan UpdateAttrs(blank); 168250276Speter TPUTS_TRACE("parm_insert_line"); 1683166124Srafan tputs(TPARM_2(parm_insert_line, n, 0), n, _nc_outch); 168462449Speter } else if (scroll_reverse && top == miny && bot == maxy) { 168550276Speter GoTo(top, 0); 1686166124Srafan UpdateAttrs(blank); 168762449Speter for (i = 0; i < n; i++) { 168850276Speter TPUTS_TRACE("scroll_reverse"); 1689166124Srafan putp(scroll_reverse); 169050276Speter } 169162449Speter } else if (insert_line && bot == maxy) { 169250276Speter GoTo(top, 0); 1693166124Srafan UpdateAttrs(blank); 169462449Speter for (i = 0; i < n; i++) { 169550276Speter TPUTS_TRACE("insert_line"); 1696166124Srafan putp(insert_line); 169750276Speter } 169862449Speter } else 169950276Speter return ERR; 170050276Speter 170166963Speter#if NCURSES_EXT_FUNCS 170262449Speter if (FILL_BCE()) { 1703166124Srafan int j; 170462449Speter for (i = 0; i < n; i++) { 170562449Speter GoTo(top + i, 0); 170662449Speter for (j = 0; j < screen_columns; j++) 170797049Speter PutChar(CHREF(blank)); 170862449Speter } 170962449Speter } 171062449Speter#endif 171150276Speter return OK; 171250276Speter} 171350276Speter 171450276Speter/* scroll by using delete_line at del and insert_line at ins */ 171550276Speter/* n > 0 */ 171662449Speterstatic int 171797049Speterscroll_idl(int n, int del, int ins, NCURSES_CH_T blank) 171850276Speter{ 171950276Speter int i; 172050276Speter 172162449Speter if (!((parm_delete_line || delete_line) && (parm_insert_line || insert_line))) 172250276Speter return ERR; 172350276Speter 172450276Speter GoTo(del, 0); 1725166124Srafan UpdateAttrs(blank); 172662449Speter if (n == 1 && delete_line) { 172750276Speter TPUTS_TRACE("delete_line"); 1728166124Srafan putp(delete_line); 172962449Speter } else if (parm_delete_line) { 173050276Speter TPUTS_TRACE("parm_delete_line"); 1731166124Srafan tputs(TPARM_2(parm_delete_line, n, 0), n, _nc_outch); 173262449Speter } else { /* if (delete_line) */ 173362449Speter for (i = 0; i < n; i++) { 173450276Speter TPUTS_TRACE("delete_line"); 1735166124Srafan putp(delete_line); 173650276Speter } 173750276Speter } 173850276Speter 173950276Speter GoTo(ins, 0); 1740166124Srafan UpdateAttrs(blank); 174162449Speter if (n == 1 && insert_line) { 174250276Speter TPUTS_TRACE("insert_line"); 1743166124Srafan putp(insert_line); 174462449Speter } else if (parm_insert_line) { 174550276Speter TPUTS_TRACE("parm_insert_line"); 1746166124Srafan tputs(TPARM_2(parm_insert_line, n, 0), n, _nc_outch); 174762449Speter } else { /* if (insert_line) */ 174862449Speter for (i = 0; i < n; i++) { 174950276Speter TPUTS_TRACE("insert_line"); 1750166124Srafan putp(insert_line); 175150276Speter } 175250276Speter } 175350276Speter 175450276Speter return OK; 175550276Speter} 175650276Speter 1757166124Srafan/* 1758166124Srafan * Note: some terminals require the cursor to be within the scrolling margins 1759166124Srafan * before setting them. Generally, the cursor must be at the appropriate end 1760166124Srafan * of the scrolling margins when issuing an indexing operation (it is not 1761166124Srafan * apparent whether it must also be at the left margin; we do this just to be 1762166124Srafan * safe). To make the related cursor movement a little faster, we use the 1763166124Srafan * save/restore cursor capabilities if the terminal has them. 1764166124Srafan */ 176576726SpeterNCURSES_EXPORT(int) 1766166124Srafan_nc_scrolln(int n, int top, int bot, int maxy) 176750276Speter/* scroll region from top to bot by n lines */ 176850276Speter{ 176997049Speter NCURSES_CH_T blank = ClrBlank(stdscr); 177050276Speter int i; 177162449Speter bool cursor_saved = FALSE; 177250276Speter int res; 177350276Speter 177450276Speter TR(TRACE_MOVE, ("mvcur_scrolln(%d, %d, %d, %d)", n, top, bot, maxy)); 177550276Speter 177650276Speter#if USE_XMC_SUPPORT 177750276Speter /* 177850276Speter * If we scroll, we might remove a cookie. 177950276Speter */ 178050276Speter if (magic_cookie_glitch > 0) { 178150276Speter return (ERR); 178250276Speter } 178350276Speter#endif 178450276Speter 178562449Speter if (n > 0) { /* scroll up (forward) */ 178650276Speter /* 178750276Speter * Explicitly clear if stuff pushed off top of region might 178850276Speter * be saved by the terminal. 178950276Speter */ 179050276Speter res = scroll_csr_forward(n, top, bot, 0, maxy, blank); 179150276Speter 179262449Speter if (res == ERR && change_scroll_region) { 179362449Speter if ((((n == 1 && scroll_forward) || parm_index) 179466963Speter && (SP->_cursrow == bot || SP->_cursrow == bot - 1)) 179562449Speter && save_cursor && restore_cursor) { 179662449Speter cursor_saved = TRUE; 179750276Speter TPUTS_TRACE("save_cursor"); 1798166124Srafan putp(save_cursor); 179950276Speter } 180050276Speter TPUTS_TRACE("change_scroll_region"); 1801166124Srafan putp(TPARM_2(change_scroll_region, top, bot)); 180262449Speter if (cursor_saved) { 180350276Speter TPUTS_TRACE("restore_cursor"); 1804166124Srafan putp(restore_cursor); 180562449Speter } else { 180650276Speter SP->_cursrow = SP->_curscol = -1; 180750276Speter } 180850276Speter 180950276Speter res = scroll_csr_forward(n, top, bot, top, bot, blank); 181050276Speter 181150276Speter TPUTS_TRACE("change_scroll_region"); 1812166124Srafan putp(TPARM_2(change_scroll_region, 0, maxy)); 181350276Speter SP->_cursrow = SP->_curscol = -1; 181450276Speter } 181550276Speter 181650276Speter if (res == ERR && _nc_idlok) 181762449Speter res = scroll_idl(n, top, bot - n + 1, blank); 181866963Speter 181950276Speter /* 182066963Speter * Clear the newly shifted-in text. 182150276Speter */ 182266963Speter if (res != ERR 182366963Speter && (non_dest_scroll_region || (memory_below && bot == maxy))) { 1824166124Srafan static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT); 182562449Speter if (bot == maxy && clr_eos) { 1826166124Srafan GoTo(bot - n + 1, 0); 182797049Speter ClrToEOS(blank2); 182866963Speter } else { 182966963Speter for (i = 0; i < n; i++) { 183066963Speter GoTo(bot - i, 0); 183197049Speter ClrToEOL(blank2, FALSE); 183250276Speter } 183350276Speter } 183450276Speter } 183550276Speter 183666963Speter } else { /* (n < 0) - scroll down (backward) */ 183750276Speter res = scroll_csr_backward(-n, top, bot, 0, maxy, blank); 183850276Speter 183962449Speter if (res == ERR && change_scroll_region) { 184062449Speter if (top != 0 && (SP->_cursrow == top || SP->_cursrow == top - 1) 184162449Speter && save_cursor && restore_cursor) { 184262449Speter cursor_saved = TRUE; 184350276Speter TPUTS_TRACE("save_cursor"); 1844166124Srafan putp(save_cursor); 184550276Speter } 184650276Speter TPUTS_TRACE("change_scroll_region"); 1847166124Srafan putp(TPARM_2(change_scroll_region, top, bot)); 184862449Speter if (cursor_saved) { 184950276Speter TPUTS_TRACE("restore_cursor"); 1850166124Srafan putp(restore_cursor); 185162449Speter } else { 185250276Speter SP->_cursrow = SP->_curscol = -1; 185350276Speter } 185450276Speter 185550276Speter res = scroll_csr_backward(-n, top, bot, top, bot, blank); 185650276Speter 185750276Speter TPUTS_TRACE("change_scroll_region"); 1858166124Srafan putp(TPARM_2(change_scroll_region, 0, maxy)); 185950276Speter SP->_cursrow = SP->_curscol = -1; 186050276Speter } 186150276Speter 186250276Speter if (res == ERR && _nc_idlok) 186362449Speter res = scroll_idl(-n, bot + n + 1, top, blank); 186466963Speter 186566963Speter /* 186666963Speter * Clear the newly shifted-in text. 186766963Speter */ 186866963Speter if (res != ERR 186966963Speter && (non_dest_scroll_region || (memory_above && top == 0))) { 1870166124Srafan static const NCURSES_CH_T blank2 = NewChar(BLANK_TEXT); 187166963Speter for (i = 0; i < -n; i++) { 187266963Speter GoTo(i + top, 0); 187397049Speter ClrToEOL(blank2, FALSE); 187466963Speter } 187566963Speter } 187650276Speter } 187750276Speter 187850276Speter if (res == ERR) 187962449Speter return (ERR); 188050276Speter 188150276Speter _nc_scroll_window(curscr, n, top, bot, blank); 188250276Speter 188350276Speter /* shift hash values too - they can be reused */ 188450276Speter _nc_scroll_oldhash(n, top, bot); 188550276Speter 188662449Speter return (OK); 188750276Speter} 188850276Speter 188976726SpeterNCURSES_EXPORT(void) 189062449Speter_nc_screen_resume(void) 189150276Speter{ 189250276Speter /* make sure terminal is in a sane known state */ 1893166124Srafan SetAttr(SCREEN_ATTRS(SP), A_NORMAL); 189450276Speter newscr->_clear = TRUE; 189550276Speter 1896166124Srafan /* reset color pairs and definitions */ 1897166124Srafan if (SP->_coloron || SP->_color_defs) 1898166124Srafan _nc_reset_colors(); 1899166124Srafan 1900166124Srafan /* restore user-defined colors, if any */ 1901166124Srafan if (SP->_color_defs < 0) { 1902166124Srafan int n; 1903166124Srafan SP->_color_defs = -(SP->_color_defs); 1904166124Srafan for (n = 0; n < SP->_color_defs; ++n) { 1905166124Srafan if (SP->_color_table[n].init) { 1906166124Srafan init_color(n, 1907166124Srafan SP->_color_table[n].r, 1908166124Srafan SP->_color_table[n].g, 1909166124Srafan SP->_color_table[n].b); 1910166124Srafan } 1911166124Srafan } 1912166124Srafan } 1913166124Srafan 191450276Speter if (exit_attribute_mode) 191550276Speter putp(exit_attribute_mode); 191662449Speter else { 191750276Speter /* turn off attributes */ 191850276Speter if (exit_alt_charset_mode) 191950276Speter putp(exit_alt_charset_mode); 192050276Speter if (exit_standout_mode) 192150276Speter putp(exit_standout_mode); 192250276Speter if (exit_underline_mode) 192350276Speter putp(exit_underline_mode); 192450276Speter } 192550276Speter if (exit_insert_mode) 192650276Speter putp(exit_insert_mode); 192750276Speter if (enter_am_mode && exit_am_mode) 192850276Speter putp(auto_right_margin ? enter_am_mode : exit_am_mode); 192950276Speter} 193050276Speter 193176726SpeterNCURSES_EXPORT(void) 193262449Speter_nc_screen_init(void) 193350276Speter{ 193450276Speter _nc_screen_resume(); 193550276Speter} 193650276Speter 193750276Speter/* wrap up screen handling */ 193876726SpeterNCURSES_EXPORT(void) 193962449Speter_nc_screen_wrap(void) 194050276Speter{ 1941166124Srafan UpdateAttrs(normal); 194266963Speter#if NCURSES_EXT_FUNCS 194362449Speter if (SP->_coloron 194462449Speter && !SP->_default_color) { 1945166124Srafan static const NCURSES_CH_T blank = NewChar(BLANK_TEXT); 194662449Speter SP->_default_color = TRUE; 194762449Speter _nc_do_color(-1, 0, FALSE, _nc_outch); 194862449Speter SP->_default_color = FALSE; 194962449Speter 195062449Speter mvcur(SP->_cursrow, SP->_curscol, screen_lines - 1, 0); 195162449Speter 195297049Speter ClrToEOL(blank, TRUE); 195362449Speter } 195462449Speter#endif 1955166124Srafan if (SP->_color_defs) { 1956166124Srafan _nc_reset_colors(); 1957166124Srafan } 195850276Speter} 195950276Speter 196050276Speter#if USE_XMC_SUPPORT 196176726SpeterNCURSES_EXPORT(void) 196262449Speter_nc_do_xmc_glitch(attr_t previous) 196350276Speter{ 1964166124Srafan attr_t chg = XMC_CHANGES(previous ^ AttrOf(SCREEN_ATTRS(SP))); 196550276Speter 196662449Speter while (chg != 0) { 196762449Speter if (chg & 1) { 196862449Speter SP->_curscol += magic_cookie_glitch; 196962449Speter if (SP->_curscol >= SP->_columns) 197062449Speter wrap_cursor(); 197166963Speter TR(TRACE_UPDATE, ("bumped to %d,%d after cookie", SP->_cursrow, SP->_curscol)); 197250276Speter } 197362449Speter chg >>= 1; 197462449Speter } 197550276Speter} 197650276Speter#endif /* USE_XMC_SUPPORT */ 1977