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decuslib20-04
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decus/20-0135/vided2.sim
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00010 OPTIONS(/l/e); COMMENT DISPLAY EDITOR. SEE
00020 VISTA.MAN for explanations on the routines used in this program;
00030 EXTERNAL TEXT PROCEDURE conc, front, storbokstav, upcase, compress,
00040 rest, inline, frontstrip, scanto, from, upto, today;
00050 EXTERNAL CHARACTER PROCEDURE findtrigger, fetchar;
00060 EXTERNAL INTEGER PROCEDURE search, scanint;
00070 EXTERNAL INTEGER PROCEDURE scan;
00080 EXTERNAL REF (infile) PROCEDURE findinfile;
00090 EXTERNAL REF (outfile) PROCEDURE findoutfile;
00100 EXTERNAL CHARACTER PROCEDURE getch;
00110 EXTERNAL INTEGER PROCEDURE trmop, gettab, checkint;
00120 EXTERNAL BOOLEAN PROCEDURE puttext, numbered, dotypeout;
00130 EXTERNAL PROCEDURE depchar, outstring, forceout, echo, abort, exit;
00140 EXTERNAL PROCEDURE outchr;
00150 EXTERNAL CLASS mvista, qregister=vided0;
00160 EXTERNAL CLASS vided1;
00170
00180 vided1 CLASS vided2(tmpoutfile,dot);
00190 BOOLEAN tmpoutfile; CHARACTER dot;
00200 VIRTUAL: PROCEDURE startmic, ! COMMENT closes files and exits;
00210 stop_editing;
00220 BEGIN
00230 PROCEDURE adjust_date(line); TEXT line;
00240 COMMENT The first line of the first page of a text file contains a
00250 date of last revision, which is updated with each edit on the file;
00260 BEGIN
00270 INTEGER datepos;
00280 INTEGER pos;
00290 INTEGER after_first_date;
00300 TEXT todaytext;
00310 datepos:= right_margin-33;
00320 IF arg[3] = "NUL:NUL" THEN ! No input file, wholly new file;
00330 BEGIN line.setpos(datepos); puttext(line,today);
00340 END ELSE
00350 BEGIN ! Find existing creation and revision dates on top line;
00360 pos:= 5;
00370 loop: line.setpos(pos); scanto(line,'-'); pos:= line.pos;
00380 IF pos + 7 > line.length THEN
00390 BEGIN IF after_first_date = 0 THEN GOTO out;
00400 datepos:= line.strip.length;
00410 IF datepos + 23 > line.length THEN GOTO out;
00420 line.setpos(datepos+3); puttext(line,"Revised: ");
00430 puttext(line,todaytext);
00440 GOTO out;
00450 END;
00460 line.setpos(pos-5);
00470 IF NOT digit(line.getchar) THEN GOTO loop;
00480 IF NOT digit(line.getchar) THEN GOTO loop;
00490 IF NOT digit(line.getchar) THEN GOTO loop;
00500 IF NOT digit(line.getchar) THEN GOTO loop;
00510 line.getchar;
00520 IF NOT digit(line.getchar) THEN GOTO loop;
00530 IF NOT digit(line.getchar) THEN GOTO loop;
00540 IF line.getchar NE '-' THEN GOTO loop;
00550 IF NOT digit(line.getchar) THEN GOTO loop;
00560 IF NOT digit(line.getchar) THEN GOTO loop;
00570 IF after_first_date = 0 THEN
00580 BEGIN
00590 todaytext:- today;
00600 IF(line.sub(line.pos-10,10) = todaytext) THEN GOTO out;
00610 after_first_date:= pos:= line.pos;
00620 GOTO loop;
00630 END;
00640 line.setpos(line.pos-10); puttext(line,todaytext);
00650 END;
00660 out:
00670 END;
00680 PROCEDURE initialload;
00690 BEGIN COMMENT input the first lines of a new page from the text file
00700 being edited;
00710 INTEGER i;
00720 !z_t(11); IF endpage THEN addff:=TRUE;
00730 IF addff AND out_pagenumber = 1 THEN out_pagenumber:= 2;
00740 endpage:= FALSE;
00750 FOR i:= 0 STEP 1 UNTIL heightm1 DO
00760 BEGIN
00770 call(p_editin_inimage);
00780 screen(i):= editin_image_strip;
00790 END;
00800 IF pageheader THEN check_page_number;
00810 home_the_cursor; !z_t(-11);
00820 END;
00830 PROCEDURE check_page_number;
00840 BEGIN COMMENT When editing a text file (with /p setting), each new
00850 page is given a header with a page number. If a header with a page
00860 number exists, no new header is created;
00870 TEXT top_line, newnum; BOOLEAN bad_header;
00880 INTEGER numstart, found_number;
00890 IF upto(screen[0],24) =
00900 "REPLACE WITH HEADER AND NUMBER OF PAGE"
00910 THEN GOTO addheader;
00920 IF upto(screen[0],46) =
00930 page_end_marker
00940 THEN GOTO addheader;
00950 find_page: ! Find digits preceded by "PAGE" or "SID" ("SID" =
00960 "PAGE" in Swedish);
00970 line_model:= screen(0);
00980 top_line:- storbokstav(line_model); top_line.setpos(1);
00990 numstart:= search(top_line,page_word)+1;
01000 IF numstart > top_line.length THEN
01010 BEGIN ! "PAGE" not found, look for "SID";
01020 top_line.setpos(1);
01030 numstart:= search(top_line,sid_word);
01040 END;
01050 IF numstart > top_line.length THEN GOTO addheader;
01060 COMMENT "PAGE" or "SID" has been found;
01070 numstart:= numstart+4;
01080 top_line:- screen[0]; top_line.setpos(numstart);
01090 WHILE top_line.more DO
01100 BEGIN IF NOT digit(top_line.getchar) THEN GOTO out;
01110 END;
01120 out:
01130 found_number:= scanint(
01140 top_line.sub(numstart,top_line.pos-numstart));
01150 IF found_number NE out_pagenumber THEN
01160 BEGIN COMMENT change the page number on the top line;
01170 newnum:- blanks(9); newnum.putint(out_pagenumber);
01180 newnum:- frontstrip(newnum);
01190 COMMENT very clumsy code in the next statement. Can be done in a
01200 more efficient manner;
01210 screen[0]:= conc(top_line.sub(1,numstart-1),
01220 newnum,from(top_line,top_line.pos-1)," ").sub(1,width);
01230 END;
01240 IF FALSE THEN addheader:
01250 BEGIN COMMENT No header with page number found;
01260 IF out_pagenumber = 1 THEN GOTO exit;
01270 IF bad_header THEN
01280 BEGIN
01290 top_line:- screen[0];
01300 IF increment > 0 THEN top_line:- from(top_line,6);
01310 top_line:=
01320 "REPLACE WITH HEADER AND NUMBER OF PAGE";
01330 END ELSE
01340 BEGIN COMMENT add lines for header;
01350 home_the_cursor; addlines(
01360 IF sub_header == NOTEXT THEN 2 ELSE 3,FALSE,FALSE);
01370 top_line:- screen[0];
01380 IF increment > 0 THEN top_line:- from(top_line,6);
01390 top_line:= header;
01400 IF sub_header =/= NOTEXT THEN
01410 BEGIN COMMENT Add subheader;
01420 top_line:- screen[1];
01430 IF increment > 0 THEN top_line:- from(top_line,6);
01440 top_line:= sub_header;
01450 END;
01460 bad_header:= TRUE;
01470 END;
01480 GOTO find_page;
01490 END;
01500 exit: line_model:= NOTEXT;
01510 END;
01520 PROCEDURE append_page;
01530 COMMENT Convert two pages into one page by appending the next page
01540 at the end of the current page, &A VIDED command;
01550 BEGIN INTEGER i, startfill;
01560 startfill:= written_lines+1;
01570 move_the_cursor_to(0,heightm1); OPTIONS(/-W);
01580 FOR startfill:= startfill STEP -1 UNTIL height-4 DO
01590 BEGIN IF addaltmode THEN outchr(terminalout,altmode,1);
01600 outchr(terminalout,linefeed,1);
01610 call(p_scroll);
01620 END;
01630 endpage:= FALSE;
01640 FOR i:= startfill STEP 1 UNTIL startfill+2 DO
01650 BEGIN move_the_cursor_to(0,i);
01660 call(p_editin_inimage); outtext(editin_image_strip);
01670 END; OPTIONS(/W);
01680 IF pageheader AND NOT endpage THEN
01690 BEGIN COMMENT Check if this page has a proper header;
01700 line_model:= screen(startfill); upcase(line_model);
01710 line_model.setpos(1);
01720 IF search(line_model,page_word) <
01730 line_model.length THEN GOTO hasheader;
01740 line_model.setpos(1);
01750 IF search(line_model,sid_word) >=
01760 line_model.length THEN GOTO afterheader;
01770 hasheader:
01780 i:= IF screen(startfill+1).strip.length <= first_text_pos
01790 THEN 1 ELSE
01800 IF screen(startfill+2).strip.length <= first_text_pos
01810 THEN 2 ELSE 0;
01820 IF i > 0 THEN
01830 BEGIN move_the_cursor_to(0,startfill);
01840 endpage:= TRUE;
01850 removelines(i); startfill:= startfill-i;
01860 endpage:= FALSE;
01870 afterheader: line_model:= NOTEXT;
01880 END;
01890 END;
01900 startfill:= startfill+3;
01910 FOR i:= startfill STEP 1 UNTIL heightm1 DO
01920 BEGIN move_the_cursor_to(0,i);
01930 call(p_editin_inimage);
01940 outtext(editin_image_strip);
01950 END;
01960 pagenumber:= pagenumber+1;
01970 END;
01980 PROCEDURE removelines(number); INTEGER number;
01990 COMMENT &K VIDED command removes lines from the screen;
02000 BEGIN
02010 INTEGER i, vpos, hpos, startline;
02020 !z_t(12); startline:= vpos:= q_verticalpos;
02030 hpos:= q_horizontalpos;
02040 save_lengthes;
02050 IF hpos > 0 THEN
02060 BEGIN COMMENT Blank the rest of the line at which the &K command
02070 was given;
02080 make_blank(width-hpos);
02090 COMMENT One (partial) line has been removed (blanked);
02100 number:= number-1; startline:= startline+1;
02110 IF number > 0 AND startline > heightm1 THEN
02120 BEGIN call(p_scroll);
02130 startline:= startline-1;
02140 vpos:= vpos-1;
02150 END;
02160 END;
02170 IF number > 0 THEN
02180 BEGIN
02190 IF number <= heightm1 - startline THEN
02200 BEGIN COMMENT All lines to be removed are inside the screen;
02210 shift(startline+number,startline,height-startline-number);
02220 restore_lines(startline,heightm1-number);
02230 startline:= height-number;
02240 END ELSE
02250 BEGIN COMMENT Some lines below the screen are to be removed;
02260 move_the_cursor_to(0,startline);
02270 FOR i:= number - height + startline
02280 STEP -1 UNTIL 1 DO
02290 BEGIN move_the_cursor_to(0,startline);
02300 cover_length:= 0;
02310 call(p_one_more_line_please);
02320 END;
02330 screen_length(startline):=
02340 screen(startline).strip.length;
02350 END;
02360 FOR i:= startline STEP 1 UNTIL heightm1 DO
02370 BEGIN COMMENT Input lines to fill empty space;
02380 move_the_cursor_to(0,i);
02390 screen(i):= NOTEXT;
02400 cover_length:= screen_length(i);
02410 call(p_one_more_line_please);
02420 END;
02430 END;
02440 synchronize(hpos,vpos); !z_t(-12);
02450 END;
02460 PROCEDURE z_scroll(steps); INTEGER steps;
02470 COMMENT &Z VIDED command, scrolls screen and inputs lines;
02480 BEGIN INTEGER i, hpos, vpos;
02490 hpos:= q_horizontalpos; vpos:= q_verticalpos-steps;
02500 IF vpos < 0 THEN
02510 BEGIN hpos:= vpos:= 0;
02520 END;
02530 move_the_cursor_to(0,heightm1);
02540 FOR i:= 1 STEP 1 UNTIL steps DO
02550 BEGIN outchr(terminalout,linefeed,1);
02560 call(p_scroll);
02570 END;
02580 move_the_cursor_to(hpos,vpos);
02590 END;
02600 PROCEDURE removechars(number); INTEGER number;
02610 BEGIN COMMENT &D VIDED command, removes chars from line;
02620 INTEGER hpos, vpos, coverlength, i;
02630 TEXT thisline, thisstripped;
02640 IF number = 0 THEN number:= 1;
02650 hpos:= q_horizontalpos; vpos:= q_verticalpos;
02660 IF number > width-hpos THEN number:= width-hpos;
02670 thisline:- screen(q_verticalpos);
02680 thisstripped:- thisline.strip;
02690 coverlength:= thisstripped.length-hpos-number;
02700 IF coverlength > 0 THEN
02710 outtext(thisline.sub(hpos+1+number,coverlength));
02720 FOR i:= 1 STEP 1 UNTIL number DO
02730 outchar(' ');
02740 move_the_cursor_to(hpos,vpos);
02750 END;
02760 PROCEDURE removeword;
02770 BEGIN COMMENT &W VIDED command removes last written word;
02780 INTEGER vertpos, horpos, coverlength, wordpos, wordlength;
02790 TEXT thisline, thisstripped;
02800 vertpos:= q_verticalpos; horpos:= q_horizontalpos;
02810 loop:
02820 thisline:- screen(vertpos);
02830 thisstripped:- thisline.sub(1,horpos).strip;
02840 IF thisstripped.length = 0 AND vertpos > 0 THEN
02850 BEGIN vertpos:= vertpos-1; horpos:= width;
02860 GOTO loop;
02870 END;
02880 FOR wordpos:= thisstripped.length STEP -1 UNTIL 1 DO
02890 IF thisstripped.sub(wordpos,1) = " " THEN GOTO out;
02900 out: wordlength:= thisstripped.length-wordpos;
02910 move_the_cursor_to(wordpos,vertpos);
02920 make_blank(wordlength);
02930 move_the_cursor_to(wordpos,vertpos);
02940 END;
02950 PROCEDURE search_for(qname,commandchar);
02960 COMMENT &S and &N VIDED commands, searches for key in text file;
02970 TEXT qname; CHARACTER commandchar;
02980 BEGIN INTEGER hpos, vpos;
02990 !z_t(13); hpos:= q_horizontalpos; vpos:= q_verticalpos;
03000 storbokstav(qname); ! Upcase key to find up-low-case equivalents;
03010 scan_screen:
03020 line_model:= screen(vpos); storbokstav(line_model);
03030 line_model.setpos(hpos+1);
03040 hpos:= search(line_model,qname); ! Search first line;
03050 IF hpos <= width THEN GOTO found;
03060 FOR vpos:= vpos+1 STEP 1 UNTIL heightm1 DO
03070 BEGIN ! Search lines on the screen;
03080 line_model:= screen(vpos);
03090 storbokstav(line_model);
03100 line_model.setpos(1);
03110 hpos:= search(line_model,qname);
03120 IF hpos <= width THEN GOTO found;
03130 END;
03140 IF commandchar = 'S' THEN GOTO out;
03150 COMMENT &S command stops, &N command searches after end of screen;
03160 IF q_display_output THEN
03170 BEGIN COMMENT Silent search;
03180 cancel_display;
03190 terminalout.outtext("Searching for """);
03200 terminalout.outtext(qname); terminalout.outtext(""".");
03210 terminalout.outimage;
03220 END;
03230 vpos:= heightm1; move_the_cursor_to(0,vpos);
03240 printing:= FALSE;
03250 WHILE NOT editin.endfile OR lower_lines =/= NONE DO
03260 BEGIN
03270 IF endpage THEN
03280 BEGIN printpage; initialload; vpos:= 0; hpos:= 0;
03290 GOTO scan_screen;
03300 END;
03310 call(p_scroll); ! very inefficient, can be optimized;
03320 line_model:= screen(vpos); storbokstav(line_model);
03330 line_model.setpos(1);
03340 hpos:= search(line_model,qname); ! Search again;
03350 IF hpos <= width THEN GOTO found;
03360 END;
03370 warning("Cannot find SEARCH text.");
03380 IF NOT q_display_output THEN resume_display; home_the_cursor;
03390 IF FALSE THEN found:
03400 BEGIN
03410 IF NOT q_display_output THEN resume_display;
03420 move_the_cursor_to(hpos-1+qname.length,vpos);
03430 END;
03440 out: printing:= TRUE; line_model:= NOTEXT; !z_t(-13);
03450 END;
03460 PROCEDURE blank_front;
03470 COMMENT &U VIDED command blanks initial part of line;
03480 BEGIN INTEGER hpos, vpos;
03490 hpos:= q_horizontalpos; vpos:= q_verticalpos;
03500 move_the_cursor_to(0,vpos);
03510 make_blank(hpos);
03520 move_the_cursor_to(0,vpos);
03530 END;
03540 PROCEDURE settab(position,modechar);
03550 CHARACTER modechar; INTEGER position;
03560 COMMENT &T VIDED commands;
03570 BEGIN INTEGER i;
03580 IF modechar = 'S' OR modechar = 's' THEN ! &TS command;
03590 tab_position(position):= TRUE ELSE
03600 BEGIN COMMENT &TZ or &TR VIDED commands;
03610 FOR i:= 1 STEP 1 UNTIL width DO tab_position(i):= FALSE;
03620 IF modechar = 'R' OR modechar = 'r' THEN
03630 BEGIN
03640 tab_position(left_margin):= TRUE;
03650 FOR i:= 8 STEP 8 UNTIL width DO tab_position(i):= TRUE;
03660 END;
03670 END;
03680 END;
03690 PROCEDURE margset(secondchar,margpos);
03700 COMMENT &M VIDED commands, setting margins;
03710 CHARACTER secondchar; INTEGER margpos;
03720 BEGIN
03730 IF margpos > widthm1 THEN margpos:= widthm1 ELSE
03740 IF margpos < 0 THEN margpos:= 0;
03750 IF secondchar = 'R' OR secondchar = 'r' THEN
03760 right_margin:= margpos ELSE
03770 IF secondchar = 'L' OR secondchar = 'l' THEN
03780 BEGIN
03790 IF margpos < first_text_pos THEN
03800 BEGIN warning(
03810 "Left margin must be >= 8 for line numbered file.");
03820 margpos:= 8;
03830 END;
03840 left_margin:= margpos;
03850 END;
03860 margin_width:= right_margin-left_margin;
03870 IF margin_width <= 0 THEN
03880 BEGIN warning("Illegal margin values.");
03890 left_margin:= 8; right_margin:= 68;
03900 END;
03910 END;
03920 TEXT PROCEDURE warning(message); NAME message; TEXT message;
03930 BEGIN INTEGER hpos, vpos, sl0;
03940 hpos:= q_horizontalpos; vpos:= q_verticalpos;
03950 home_the_cursor;
03960 INSPECT terminalin DO INSPECT terminalout DO
03970 BEGIN
03980 outtext("?VIDED - ");
03990 outtext(message); outtext(" ");
04000 sl0:= image.pos-1; breakoutimage; outimage;
04010 outtext("To continue type RETURN. "); breakoutimage;
04020 inimage; warning:- image.strip;
04030 END;
04040 IF q_display_output THEN
04050 BEGIN
04060 home_the_cursor; outtext(screen[0].sub(1,sl0));
04070 move_the_cursor_to(0,1); outtext(screen[1].sub(1,39));
04080 END;
04090 move_the_cursor_to(hpos,vpos);
04100 END;
04110 PROCEDURE justify(lines,evenmargin);
04120 INTEGER lines; BOOLEAN evenmargin;
04130 BEGIN COMMENT &J VIDED command;
04140 TEXT longline, printline;
04150 INTEGER last_line_in, printcount, vpos, divpos, line_number;
04160 INTEGER hpos, part_length, leftmark;
04170 PROCEDURE putline;
04180 BEGIN COMMENT output one line of &J-justified text;
04190 !z_t(14); printcount:= printcount+1;
04200 IF printcount <= lines THEN
04210 BEGIN
04220 IF printcount = 1 THEN
04230 BEGIN IF hpos < left_margin THEN
04240 outtext(line_model.sub(1,left_margin-hpos));
04250 END ELSE
04260 outtext(line_model.sub(1,left_margin-leftmark+1));
04270 outtext(printline);
04280 make_blank(width-q_horizontalpos);
04290 END ELSE
04300 BEGIN
04310 addlines(1,TRUE,FALSE);
04320 move_the_cursor_to(left_margin,vpos);
04330 outtext(printline);
04340 END;
04350 IF vpos = heightm1 THEN
04360 BEGIN move_the_cursor_to(leftmark-1,heightm1);
04370 outchr(terminalout,linefeed,1);
04380 call(p_scroll);
04390 move_the_cursor_to(leftmark-1,heightm1);
04400 END ELSE
04410 BEGIN vpos:= vpos+1;
04420 move_the_cursor_to(first_text_pos,vpos);
04430 END;
04440 part_length:= margin_width; !z_t(-14);
04450 END of putline;
04460 COMMENT Main part of the justify procedure (&J VIDED command);
04470 !z_t(15); vpos:= q_verticalpos; save_lengthes;
04480 leftmark:= first_text_pos+1;
04490 IF q_horizontalpos >= right_margin OR q_horizontalpos < leftmark-1
04500 THEN move_the_cursor_to(leftmark-1,vpos);
04510 hpos:= q_horizontalpos;
04520 IF lines = 0 THEN
04530 BEGIN COMMENT user did not give any size of area to be justify,
04540 justify to next blank line or line beginning with a dot;
04550 IF vpos < heightm1 THEN
04560 BEGIN IF screen_length[vpos] = 0 THEN
04570 BEGIN
04580 vpos:= vpos+1; hpos:= 0;
04590 move_the_cursor_to(0,vpos);
04600 END;
04610 END;
04620 FOR last_line_in:= vpos STEP 1 UNTIL heightm1 DO
04630 BEGIN
04640 IF fetchar(screen[last_line_in],leftmark) = dot THEN
04650 GOTO last_found;
04660 IF screen_length[last_line_in] <= leftmark-1 THEN GOTO
04670 last_found;
04680 END;
04690 last_line_in:= height;
04700 last_found: last_line_in:= last_line_in-1;
04710 END ELSE
04720 BEGIN last_line_in:= vpos+lines-1;
04730 IF last_line_in > heightm1 THEN last_line_in:= heightm1;
04740 END;
04750 lines:= last_line_in-vpos+1;
04760
04770 COMMENT We now know how many lines to justify, create a long
04780 text in which to store the entire text to be justified;
04790 longline:- blanks(width*(lines)+1);
04800 COMMENT Put first line into this long buffer;
04810 IF screen_length(vpos) > hpos THEN
04820 puttext(longline,frontstrip(screen(vpos)
04830 .sub(hpos+1,screen_length(vpos)-hpos)));
04840 COMMENT scan through lines to be included in paragraph;
04850 FOR line_number:= vpos+1 STEP 1 UNTIL last_line_in DO
04860 BEGIN
04870 IF fetchar(screen[line_number-1],
04880 screen_length[line_number-1]) = '-' THEN
04890 warning("There is a line ending with a dash (-).");
04900 IF fetchar(screen[line_number],1) = '*' THEN
04910 BEGIN COMMENT do not include page_end_marker in text;
04920 IF screen[line_number].strip = page_end_marker THEN
04930 GOTO loop;
04940 END;
04950 COMMENT space between words on successive lines;
04960 IF screen_length(line_number-1) < width OR
04970 fetchar(screen[line_number],1) = ' ' THEN
04980 longline.setpos(longline.pos+1);
04990 puttext(longline,frontstrip(screen[line_number].
05000 sub(leftmark,screen_length[line_number]-leftmark+1)));
05010 loop:
05020 END;
05030 part_length:= right_margin-hpos;
05040 IF part_length > margin_width THEN
05050 part_length:= margin_width;
05060 longline:- longline.sub(1,longline.pos);
05070 COMMENT split the combined text into suitable line segments
05080 to output on succesive lines;
05090 WHILE longline.length > part_length DO
05100 BEGIN COMMENT find space do divide line at;
05110 FOR divpos:= part_length+1 STEP -1 UNTIL 1 DO
05120 BEGIN
05130 IF fetchar(longline,divpos) = ' ' THEN
05140 BEGIN
05150 IF NOT digit(fetchar(longline,divpos-1)) THEN GOTO
05160 divide;
05170 IF NOT digit(fetchar(longline,divpos+1)) THEN GOTO
05180 divide;
05190 END;
05200 END;
05210 printline:- longline.sub(1,part_length);
05220 longline:- longline.sub(part_length+1,
05230 longline.length-part_length);
05240 IF FALSE THEN
05250 divide:
05260 BEGIN
05270 printline:- longline.sub(1,divpos-1);
05280 longline:-
05290 longline.sub(divpos+1,longline.length-divpos);
05300 END;
05310 putline;
05320 END;
05330 COMMENT output last line of paragraph;
05340 IF longline =/= NOTEXT THEN
05350 BEGIN printline:- longline; putline;
05360 END;
05370 COMMENT IF paragraph became shorter, remove the extra lines;
05380 IF printcount < lines THEN
05390 removelines(lines-printcount); !z_t(-15);
05400 END;
05410 PROCEDURE control_c;
05420 BEGIN COMMENT action of &c vided command;
05430 INTEGER hor, vert;
05440 hor:= q_horizontalpos; vert:= q_verticalpos;
05450 synchronize(0,heightm1); ! Cursor down to bottom of screen;
05460 terminalout.outimage; terminalout.outimage;
05470 COMMENT restore switch settings;
05480 trmop(8r2005,terminalout,ttytab); echon;
05490 exit(0);
05500 COMMENT user has typed continue or reenter-proceed. Set switches
05510 and restore screen;
05520 set_tty_tab;
05530 q_horizontalpos:= hor; q_verticalpos:= vert;
05540 restore_screen(q_verticalpos);
05550 END;
05560 PROCEDURE position_tab(tabcharhandling); BOOLEAN tabcharhandling;
05570 COMMENT User has input a horizontal tab <HT> character. Move to the
05580 next tabulator point;
05590 BEGIN
05600 INTEGER i;
05610 INTEGER hpos, vpos;
05620 hpos:= q_horizontalpos; vpos:= q_verticalpos;
05630 IF terminaltype = newelite OR terminaltype = newkthelite THEN
05640 q_horizontalpos:= (q_horizontalpos+8)//8*8;
05650 IF tabcharhandling AND
05660 (terminaltype = minitec OR terminaltype = 0) THEN
05670 BEGIN
05680 synchronize(0,vpos);
05690 hpos:= hpos+8; IF hpos > width THEN
05700 restore_screen(q_verticalpos) ELSE
05710 outtext(screen(vpos).sub(1,hpos));
05720 hpos:= hpos-8;
05730 END;
05740 FOR i:= hpos+1 STEP 1 UNTIL widthm1 DO
05750 IF tab_position(i) THEN GOTO out;
05760 i:= widthm1; IF terminaltype >= elite AND
05770 terminaltype <= newkthelite THEN synchronize(i,vpos);
05780
05790 out: move_the_cursor_to(i,vpos);
05800 END;
05810 PROCEDURE pagedivide;
05820 BEGIN COMMENT &PI VIDED command to split pages;
05830 INTEGER vpos, i;
05840 !z_t(16); vpos:= q_verticalpos;
05850 cancel_display;
05860 COMMENT split in the middle of a line;
05870 IF q_horizontalpos > 0 THEN
05880 BEGIN addlines(1,TRUE,FALSE); vpos:= vpos+1;
05890 END;
05900 COMMENT remove page_end_marker before splitting;
05910 FOR i:= vpos STEP 1 UNTIL heightm1 DO
05920 BEGIN
05930 IF screen[i].strip = page_end_marker THEN
05940 BEGIN
05950 move_the_cursor_to(0,i); removelines(1);
05960 move_the_cursor_to(0,vpos);
05970 END;
05980 END;
05990 COMMENT Scroll out lines to previous page;
06000 move_the_cursor_to(0,heightm1);
06010 printing:= FALSE;
06020 FOR i:= 1 STEP 1 UNTIL vpos DO
06030 BEGIN call(p_scroll);
06040 move_the_cursor_to(0,heightm1);
06050 END;
06060 printing:= TRUE;
06070 COMMENT Output previous page to the output text file;
06080 empty_top_of_page; addff:= TRUE;
06090 IF out_pagenumber = 1 THEN out_pagenumber:= 2;
06100 IF pageheader THEN check_page_number;
06110 home_the_cursor; resume_display; !z_t(-16);
06120 END;
06130 PROCEDURE newpages(number, findend);
06140 INTEGER number; BOOLEAN findend; ! findend = &PnE command;
06150 COMMENT &P, &PnE and &PnN VIDED commands, move to given page;
06160 BEGIN INTEGER i; BOOLEAN addpage; CHARACTER c;
06170 !z_t(17); IF addaltmode THEN outchr(terminalout,altmode,1);
06180 outchr(terminalout,erasescreen,1);
06190 COMMENT notify user before time consuming action;
06200 IF number > 1 THEN forceout(terminalout);
06210 pagenumber:= pagenumber+number;
06220 COMMENT output and input "number" pages;
06230 FOR i:= 1 STEP 1 UNTIL number DO
06240 BEGIN
06250 printpage;
06260 IF NOT addpage AND editin.endfile THEN
06270 BEGIN
06280 INSPECT terminalout DO INSPECT terminalin DO
06290 BEGIN
06300 IF NOT q_echoenabled THEN echon;
06310 outtext("No such page? Shall we?"); outimage;
06320 loop: outtext("1 Add a new page"); outimage;
06330 outtext("2 Finish the editing"); outimage;
06340 inimage; c:= inchar;
06350 IF c = '1' THEN addpage:= TRUE ELSE
06360 IF c = '2' THEN stop_editing ELSE
06370 BEGIN outtext("Answer 1 or 2"); outimage;
06380 GOTO loop;
06390 END;
06400 END;
06410 END;
06420 initialload; addff:= TRUE;
06430 END;
06440 out:
06450 home_the_cursor;
06460 IF number = 0 THEN findtop; ! &P0 or &P0E command;
06470 IF findend THEN ! &PnE command;
06480 BEGIN
06490 move_the_cursor_to(0,heightm1);
06500 printing:= FALSE;
06510 WHILE (NOT endpage AND NOT editin.endfile)
06520 OR lower_lines =/= NONE DO call(p_scroll);
06530 printing:= TRUE;
06540 END;
06550 restore_screen(q_verticalpos); !z_t(-17);
06560 END;
06570 PROCEDURE findtop;
06580 COMMENT move screen to the top of the current page;
06590 BEGIN INTEGER i, start, stop;
06600 TEXT exchanger;
06610 start:= heightm1; stop:= heightm1-top_fill;
06620 IF stop < 0 THEN stop:= 0;
06630 FOR i:= start STEP -1 UNTIL stop DO
06640 push_line(screen[i]);
06650 FOR top_fill:= top_fill STEP -1 UNTIL height DO
06660 push_line(top_of_page[top_fill]);
06670 IF top_fill > heightm1 THEN top_fill:= heightm1;
06680 stop:= heightm1-top_fill-1;
06690 FOR i:= 0 STEP 1 UNTIL stop DO
06700 exchange_lines(heightm1-i,heightm1-i-top_fill-1);
06710 FOR i:= 0 STEP 1 UNTIL top_fill DO
06720 BEGIN exchanger:- screen(i);
06730 screen[i]:- top_of_page[i];
06740 top_of_page[i]:- exchanger;
06750 END;
06760 top_fill:= -1;
06770 END;
06780 PROCEDURE finalwrite;
06790 COMMENT &E VIDED command, input and output the rest of
06800 the pages and print final message;
06810 BEGIN
06820 INTEGER i;
06830 IF addaltmode THEN outchr(terminalout,altmode,1);
06840 outchr(terminalout,erasescreen,1);
06850 printpage;
06860 WHILE NOT editin.endfile DO
06870 BEGIN
06880 initialload; addff:= TRUE;
06890 printpage;
06900 END;
06910 blank_the_screen;
06920 outtext("VIDED IS FINISHING.");
06930 outimage;
06940 outtext(" INPUT FILE """);
06950 outtext(arg[3]); outchar('"'); outimage;
06960 outtext(" OUTPUT FILE """);
06970 outtext(arg[(IF tmpoutfile THEN 3 ELSE 1)]); outchar('"');
06980 forceout(terminalout);
06990
07000 END;
07010 PROCEDURE set_tty_tab;
07020 BEGIN COMMENT set TRMOP .TTY TAB setting to govern monitor handling
07030 of <HT> characters;
07040 ttytab:= IF terminaltype = minitec
07050 THEN 8r1005 ELSE 8r2005;
07060 ttytab:= trmop(ttytab,terminalout,1);
07070 IF terminaltype = infoton OR terminaltype = teletec THEN
07080 ttytab:= 0;
07090 END;
07100 COMMENT Main part of the class VIDED2, initialize variables;
07110 scrollallow:= TRUE; first_input_line:= TRUE;
07120 out_pagenumber:= 1;
07130 page_word:- copy("PAGE "); sid_word:- copy("SID ");
07140 header:- blanks(IF increment > 0 THEN width-5 ELSE width);
07150 header:= "REPLACE WITH HEADER AND NUMBER OF PAGE 00";
07160 command:- blanks(width);
07170 restorechar:= erasescreen;
07180 line_model:- blanks(width);
07190 control_d:= char(4); control_f:= char(6);
07200 control_v:= char(22);
07210 control_u:=IF terminaltype = cdc71310s THEN char(1) ELSE char(21);
07220 control_w:= char(23);
07230 margin_width:= right_margin-left_margin;
07240 set_tty_tab;
07250 settab(0,'R'); ! Initial default tab settings;
07260 initialload; pagenumber:= 1; ! Load first page;
07270 IF pageheader THEN adjust_date(screen[0]);
07280 restore_screen(0); ! Display first page;
07290 top_size:= pageheight;
07300 FOR top_fill:= top_size STEP -1 UNTIL 0 DO
07310 top_of_page[top_fill]:- blanks(width);
07320 INNER;
07330 COMMENT here we come when user has made the &E VIDED command;
07340 finalwrite;
07350 trmop(8r2005,terminalout,ttytab);
07360 startmic;
07370 END;