paper.ps

早期freebsd实现

(ince the screen package needs to kno)327.01 597.6 R 2.55(ww)-.25 G(hat)491.78
597.6 Q .255(is on the terminal at all times, if characters are to be echoed, \
the tty must be in ra)72 609.6 R 2.755(wo)-.15 G 2.755(rc)414.135 609.6 S .255
(break mode.)424.66 609.6 R .255(If it is)5.255 F(not,)72 621.6 Q F3(getch)2.5
E F1(\(\) sets it to be cbreak, and then reads in the character)A(.)-.55 E F0
-4.998(33)72 645.6 S -2.498(..)4.998 G -4.998(44)2.498 G 7.496 -2.498(.. T)
4.998 H -.92(Te)92.01 645.6 S(er)97.762 645.6 Q(rm)102.204 645.6 Q(mi)106.646
645.6 Q(in)114.978 645.6 Q(na)117.76 645.6 Q(at)123.322 645.6 Q(ti)128.324
645.6 Q(io)131.656 645.6 Q(on)134.438 645.6 Q(n)139.44 645.6 Q F1 .044
(In order to perform certain optimizations, and, on some terminals, to w)97
661.8 R .044(ork at all, some things must be)-.1 F .058
(done before the screen routines start up.)72 673.8 R .059
(These functions are performed in)5.059 F F3(getttmode)2.559 E F1 .059
(\(\) and)B F3(setterm)2.559 E F1(\(\),)A .233(which are called by)72 685.8 R
F3(initscr)2.733 E F1 2.733(\(\). In)B .233
(order to clean up after the routines, the routine)2.733 F F3(endwin)2.733 E F1
.233(\(\) is pro)B(vided.)-.15 E .406(It restores tty modes to what the)72
697.8 R 2.906(yw)-.15 G .406(ere when)217.732 697.8 R F3(initscr)2.906 E F1
.407(\(\) w)B .407(as f)-.1 F .407(irst called.)-.2 F .407
(The terminal state module uses)5.407 F .793(the v)72 709.8 R(ariable)-.25 E F2
(cur)3.293 E(ses_termios)-.1 E F1 .793(to sa)3.293 F 1.093 -.15(ve t)-.2 H .793
(he original terminal state which is then restored upon a call to).15 F F3
(end-)3.292 E(win)72 721.8 Q F1 3.451(\(\). Thus,)B(an)3.451 E .951
(ytime after the call to initscr)-.15 F(,)-.4 E F3(endwin)3.451 E F1 .952
(\(\) should be called before e)B 3.452(xiting. Note)-.15 F(ho)3.452 E(we)-.25
E -.15(ve)-.25 G -.4(r,).15 G EP
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-3.328(::)4.998 G -4.998(11)3.328 G -4.998(99)4.998 G -3.328(--)4.998 G 334.474
-4.998(66 S)3.328 H(Sc)-.56 E(cr)442.888 60 Q -.18(re)447.33 60 S(ee)451.592 60
Q(en)456.034 60 Q 2.5(nP)460.476 60 S -.1(Pa)468.538 60 S(ac)474.55 60 Q(ck)
479.552 60 Q(ka)483.994 60 Q(ag)489.556 60 Q(ge)494.558 60 Q(e)499.56 60 Q/F1
10/Times-Roman@0 SF(that)72 96 Q/F2 10/Courier-Bold@0 SF(endwin)3.338 E F1 .838
(\(\) should al)B -.1(wa)-.1 G .838(ys be called).1 F F0 -5.558(bb)3.338 G
-4.438(ee)5.558 G 3.906 -3.328(ff o)4.438 H(or)-1.67 E -.18(re)255.338 96 S(e)
259.6 96 Q F1 .838(the f)3.338 F .838(inal calls to)-.2 F F2(delwin)3.337 E F1
.837(\(\), which free the storage of the)B(windo)72 108 Q(ws.)-.25 E F0 -4.998
(44)72 132 S 7.496 -2.498(.. C)4.998 H(Cu)84.506 132 Q(ur)91.728 132 Q(rs)97.29
132 Q(so)101.732 132 Q(or)105.624 132 Q 2.5(rM)110.626 132 S(Mo)117.568 132 Q
-.1(ov)127.01 132 S -.1(ve)131.912 132 S(em)136.814 132 Q(me)141.256 132 Q(en)
149.588 132 Q(nt)154.03 132 Q 2.5(tO)159.592 132 S(Op)165.424 132 Q(pt)173.206
132 Q(ti)178.768 132 Q(im)182.1 132 Q(mi)184.882 132 Q(iz)193.214 132 Q(za)
195.996 132 Q(at)200.438 132 Q(ti)205.44 132 Q(io)208.772 132 Q(on)211.554 132
Q(ns)216.556 132 Q(s)222.118 132 Q F1 .168(One of the most dif)97 148.2 R -.2
(fi)-.25 G .168(cult things to do properly is motion optimization.).2 F .168
(After using)5.168 F F2(gettmode)2.668 E F1 .168(\(\) and)B F2(setterm)72 160.2
Q F1 .367(\(\) to get the terminal descriptions, the function)B F2(mvcur)2.866
E F1 .366(\(\) deals with this task.)B .366(It usage is simple:)5.366 F
(simply tell it where you are no)72 172.2 Q 2.5(wa)-.25 G(nd where you w)208.12
172.2 Q(ant to go.)-.1 E -.15(Fo)5 G 2.5(re).15 G(xample)335.2 172.2 Q
(mvcur\(0, 0, LINES/2, COLS/2\);)112 188.4 Q -.1(wo)72 208.8 S .04(uld mo).1 F
.34 -.15(ve t)-.15 H .04(he cursor from the home position \(0,).15 F .04
(0\) to the middle of the screen.)2.5 F .04(If you wish to force abso-)5.04 F
.684(lute addressing, you can use the function)72 220.8 R F2(tgoto)3.184 E F1
.684(\(\) from the)B F0 -3.328(tt)3.184 G -4.438(ee)3.328 G -4.438(rr)4.438 G
-8.328(mm)4.438 G -2.778(ll)8.328 G -2.778(ii)2.778 G -5.558(bb)2.778 G F1 .684
(\(7\) routines, or you can tell)5.558 F F2(mvcur)3.184 E F1(\(\))A 1.602
(that you are impossibly f)72 232.8 R 1.602(ar a)-.1 F -.1(wa)-.15 G 2.902 -.65
(y, F).1 H 1.602(or e).5 F 1.602(xample, to absolutely address the lo)-.15 F
1.603(wer left hand corner of the)-.25 F(screen from an)72 244.8 Q
(ywhere just claim that you are in the upper right hand corner:)-.15 E
(mvcur\(0, COLS\2551, LINES\2551, 0\);)112 261 Q F0 -4.998(55)72 289.2 S 7.496
-2.498(.. C)4.998 H(Ch)84.506 289.2 Q(ha)91.728 289.2 Q(ar)97.29 289.2 Q(ra)
102.292 289.2 Q(ac)106.734 289.2 Q(ct)111.736 289.2 Q(te)116.178 289.2 Q(er)
119.51 289.2 Q 2.5(rO)123.952 289.2 S(Ou)130.894 289.2 Q(ut)138.676 289.2 Q(tp)
144.238 289.2 Q(pu)147.57 289.2 Q(ut)153.132 289.2 Q 2.5(ta)158.694 289.2 S(an)
164.526 289.2 Q(nd)169.528 289.2 Q 2.5(dS)175.09 289.2 S(Sc)183.152 289.2 Q(cr)
188.714 289.2 Q -.18(ro)193.156 289.2 S(ol)197.418 289.2 Q(ll)202.42 289.2 Q
(li)205.202 289.2 Q(in)207.984 289.2 Q(ng)210.766 289.2 Q(g)216.328 289.2 Q F1
.01(The character output polic)97 305.4 R 2.51(yd)-.15 G .01
(eals with the follo)214.64 305.4 R .01(wing problems.)-.25 F .01
(First, where is the location of the cur)5.01 F(-)-.2 E
(sor after a character is printed, and secondly)72 317.4 Q 2.5(,w)-.65 G
(hen does the screen scroll if scrolling is enabled.)260.18 317.4 Q .007
(In the normal case the characters are output as e)97 333.6 R .007
(xpected, with the cursor occup)-.15 F .007(ying the position of the)-.1 F(ne)
72 345.6 Q 1.181(xt character to be output.)-.15 F(Ho)6.181 E(we)-.25 E -.15
(ve)-.25 G 1.981 -.4(r, w).15 H 1.181
(hen the cursor is on the last column of the line, the cursor will).4 F .129(r\
emain on that position after the last character on the line is output and will\
 only assume the position on the)72 357.6 R(ne)72 369.6 Q(xt line when the ne)
-.15 E(xt character \(the f)-.15 E(irst on the ne)-.2 E(xt line\) is output.)
-.15 E(Lik)97 385.8 Q -.25(ew)-.1 G .226
(ise, if scrolling is enabled, a scroll will be in).25 F -.2(vo)-.4 G -.1(ke).2
G 2.726(do).1 G .226(nly when the f)332.632 385.8 R .226
(irst character on he f)-.2 F .226(irst line)-.2 F .697
(past the bottom line of the windo)72 397.8 R 3.197(wi)-.25 G 3.197(so)221.349
397.8 S 3.197(utput. If)233.436 397.8 R .697
(scrolling is not enabled the chracters will to be output to)3.197 F
(the bottom right corner of the windo)72 409.8 Q 2.5(ww)-.25 G
(hich is the cursor location.)234.23 409.8 Q .368(This polic)97 426 R 2.868(ya)
-.15 G(llo)149.806 426 Q .368(ws consistent beha)-.25 F .368
(vior of the cursor at the boundary conditions.)-.2 F .367
(Furthermore, it pre-)5.368 F -.15(ve)72 438 S .494(nts a scroll from happenin\
g before it is actually needed \(the old package used to scroll when the botto\
m).15 F(right position w)72 450 Q(as output a character\).)-.1 E
(As a precendent, it models the)5 E/F3 10/Times-Italic@0 SF(xterm)2.5 E F1
(character output con)2.5 E -.15(ve)-.4 G(ntions.).15 E F0 -4.998(66)72 474 S
7.496 -2.498(.. T)4.998 H -.92(Te)84.506 474 S(er)90.258 474 Q(rm)94.7 474 Q
(mi)99.142 474 Q(in)107.474 474 Q(na)110.256 474 Q(al)115.818 474 Q 2.5(lS)
120.82 474 S(St)126.102 474 Q(ta)131.664 474 Q(at)134.996 474 Q(te)139.998 474
Q 2.5(eH)143.33 474 S(Ha)150.272 474 Q(an)158.054 474 Q(nd)163.056 474 Q(dl)
168.618 474 Q(li)174.18 474 Q(in)176.962 474 Q(ng)179.744 474 Q(g)185.306 474 Q
F1 1.173(The v)97 490.2 R(ariable)-.25 E F3(cur)3.673 E(ses_termios)-.1 E F1
1.173(contains the terminal state of the terminal.)3.673 F 1.172
(Certain historical routines)6.172 F .301(return information:)72 502.2 R F2
(baudrate)2.801 E F1(\(\),)A F2(erasechar)2.801 E F1(\(\),)A F2(killchar)2.801
E F1 .301(\(\), and)B F2(ospeed)2.801 E F1 2.801(\(\). These)B .301
(routines are obso-)2.801 F 1.059(lete and e)72 514.2 R 1.058
(xist only for backw)-.15 F 1.058(ard compatibility)-.1 F 6.058(.I)-.65 G 3.558
(fy)273.758 514.2 S 1.058(ou wish to use the information in the)285.646 514.2 R
F3(cur)3.558 E(ses_termios)-.1 E F1(structure, you should use the)72 526.2 Q F3
(tsetattr)2.5 E F1(\(3\) routines.)A F0 -4.998(77)72 550.2 S 7.496 -2.498(.. S)
4.998 H(Su)84.506 550.2 Q(ub)90.068 550.2 Q(bw)95.63 550.2 Q(wi)101.192 550.2 Q
(in)108.414 550.2 Q(nd)111.196 550.2 Q(do)116.758 550.2 Q -.1(ow)122.32 550.2 S
(ws)127.222 550.2 Q(s)134.444 550.2 Q F1(Subwindo)97 566.4 Q 1.17(ws are windo)
-.25 F 1.17(ws which do not ha)-.25 F 1.471 -.15(ve a)-.2 H 3.671(ni).15 G
1.171(ndependent te)303.824 566.4 R 1.171(xt structure,)-.15 F F3(i.e)3.671 E
(.)-.15 E F1 3.671(,t)C(he)434.298 566.4 Q 3.671(ya)-.15 G 1.171(re windo)
456.699 566.4 R(ws)-.25 E .648(whose te)72 578.4 R .648
(xt is a subset of the te)-.15 F .648(xt of a lar)-.15 F .647(ger windo)-.18 F
.647(w: the)-.25 F F3(par)3.147 E(ent)-.37 E F1(windo)3.147 E 4.447 -.65(w. O)
-.25 H .647(ne consequence of this is that).65 F .025
(changes to either the parent or the child windo)72 590.4 R 2.525(wa)-.25 G
.025(re destructi)271.655 590.4 R .325 -.15(ve t)-.25 H 2.525(ot).15 G .025
(he other)341.04 590.4 R(,)-.4 E F3(i.e)2.525 E(.)-.15 E F1 2.526(,ac)C .026
(hange to the subwindo)406.682 590.4 R(w)-.25 E .391
(is also a change to the parent windo)72 602.4 R 2.891(wa)-.25 G .391
(nd a change to the parent windo)232.068 602.4 R 2.891(wi)-.25 G 2.891(nt)
374.805 602.4 S .391(he re)385.476 602.4 R .391(gion def)-.15 F .391
(ined by the sub-)-.2 F(windo)72 614.4 Q 2.87(wi)-.25 G 2.87(si)109.62 614.4 S
.37(mplicitly a change to the subwindo)119.16 614.4 R 2.871(wa)-.25 G 2.871(sw)
275.562 614.4 S 2.871(ell. Apart)289.543 614.4 R .371
(from this detail, subwindo)2.871 F .371(ws function lik)-.25 F(e)-.1 E(an)72
626.4 Q 2.5(yo)-.15 G(ther windo)93.79 626.4 Q -.65(w.)-.25 G F0 -4.998(88)72
650.4 S 7.496 -2.498(.. T)4.998 H(Th)84.506 650.4 Q(he)91.178 650.4 Q 2.5(eF)
96.74 650.4 S(Fu)103.682 650.4 Q(un)109.794 650.4 Q(nc)115.356 650.4 Q(ct)
120.918 650.4 Q(ti)125.36 650.4 Q(io)128.692 650.4 Q(on)131.474 650.4 Q(ns)
136.476 650.4 Q(s)142.038 650.4 Q F1 1.409(In the follo)97 666.6 R 1.409
(wing def)-.25 F 1.409(initions, \231)-.2 F/F4 8/Times-Bold@0 SF -3.998<8787>C
F1 3.909<9a6d>3.998 G 1.408
(eans that the \231function\232 is really a \231#def)241.477 666.6 R 1.408
(ine\232 macro with ar)-.2 F(gu-)-.18 E(ments.)72 678.6 Q F2(addch)72 706.8 Q
F1(\()A F3 -.15(ch)C(ar c).15 E(h)-.15 E F1<293b87>A EP
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/F0 10/Times-Bold@0 SF -5.558(SS)72 60 S -4.438(cc)5.558 G 6.196 -4.438(rr ee)
4.438 H -4.438(ee)4.438 G 11.116 -5.558(nn P)4.438 H -.1(Pa)-.55 G(ac)109.226
60 Q(ck)114.228 60 Q(ka)118.67 60 Q(ag)124.232 60 Q(ge)129.234 60 Q 326.978(eP)
134.236 60 S(PS)465.656 60 Q(S1)471.768 60 Q(1:)477.33 60 Q(:1)482.332 60 Q(19)
485.664 60 Q(9-)490.666 60 Q(-7)495.668 60 Q(7)499 60 Q/F1 10/Times-Roman@0 SF
.805(Add the character)97 96 R/F2 10/Times-Italic@0 SF -.15(ch)3.306 G F1 .806
(on the windo)3.456 F 3.306(wa)-.25 G 3.306(tt)254.14 96 S .806(he current \(y)
263.006 96 R 2.5(,x)-.65 G 3.306(\)c)325.058 96 S 3.306(o-ordinates. If)336.134
96 R .806(the character is a ne)3.306 F(wline)-.25 E 1.063
(\(\264\\n\264\) the line will be cleared to the end, and the current \(y)97
108 R 2.5(,x)-.65 G 3.563(\)c)351.546 108 S 1.062
(o-ordinates will be changed to the)362.879 108 R(be)97 120 Q .221(ginning of)
-.15 F 2.721(ft)-.25 G .222(he ne)156.482 120 R .222(xt line if ne)-.15 F .222
(wline mapping is on, or to the ne)-.25 F .222
(xt line at the same x co-ordinate if it)-.15 F 1.682(is of)97 132 R 4.182
(f. A)-.25 F 1.682(return \(\264\\r\264\) will mo)4.182 F 1.982 -.15(ve t)-.15
H 4.182(ot).15 G 1.682(he be)252.106 132 R 1.681
(ginning of the line on the windo)-.15 F 5.481 -.65(w. T)-.25 H 1.681
(abs \(\264\\t\264\) will be)-.15 F -.15(ex)97 144 S .093
(panded into spaces in the normal tabstop positions of e).15 F -.15(ve)-.25 G
.093(ry eight characters.).15 F .093(This returns ERR if it)5.093 F -.1(wo)97
156 S(uld cause the screen to scroll ille).1 E -.05(ga)-.15 G(lly).05 E(.)-.65
E/F3 10/Courier-Bold@0 SF(addstr)72 184.2 Q F1(\()A F2 -.15(ch)C(ar).15 E/F4 10
/Symbol SF(*)2.5 E F2(str)A F1<293b87>A .164(Add the string pointed to by)97
200.4 R F2(str)2.664 E F1 .163(on the windo)2.663 F 2.663(wa)-.25 G 2.663(tt)
292.826 200.4 S .163(he current \(y)301.049 200.4 R 2.5(,x)-.65 G 2.663(\)c)
361.815 200.4 S 2.663(o-ordinates. This)372.248 200.4 R .163(returns ERR if)
2.663 F(it w)97 212.4 Q(ould cause the screen to scroll ille)-.1 E -.05(ga)-.15
G(lly).05 E 5(.I)-.65 G 2.5(nt)277.69 212.4 S
(his case, it will put on as much as it can.)287.97 212.4 Q F3(baudrate)72
240.6 Q F1<28293b87>A 2.353(Returns the output baud rate of the terminal.)97
256.8 R 2.354(This is a system dependent constant \(def)7.353 F 2.354(ined in)
-.2 F F0 -5.698(<<)97 268.8 S -3.888(ss)5.698 G -4.998(yy)3.888 G -3.888(ss)
4.998 G -2.778(//)3.888 G -3.328(tt)2.778 G -3.328(tt)3.328 G 6.796 -4.998
(yy .)3.328 H(.h)2.5 E(h>)131.74 268.8 Q(>)137.302 268.8 Q F1
(on BSD systems, which is included by)2.5 E F0 -5.698(<<)2.5 G -4.438(cc)5.698
G -5.558(uu)4.438 G -4.438(rr)5.558 G -3.888(ss)4.438 G -4.438(ee)3.888 G
-3.888(ss)4.438 G -2.498(..)3.888 G -5.558(hh)2.498 G -5.698(>>)5.558 G F1(\).)
5.698 E F3(box)72 297 Q F1(\()A F2(WINDO)A 2.5(Ww)-.5 G(in)143.1 297 Q F1(,)A
F2 -.15(ch)2.5 G(ar vert).15 E F1(,)A F2 -.15(ch)2.5 G(ar hor).15 E F1(\);)A
(Dra)97 313.2 Q .079(ws a box around the windo)-.15 F 2.579(wu)-.25 G(sing)
234.824 313.2 Q F2(vert)2.578 E F1 .078(as the character for dra)2.578 F .078
(wing the v)-.15 F .078(ertical sides, and)-.15 F F2(hor)2.578 E F1(for)2.578 E
(dra)97 325.2 Q 1.58(wing the horizontal lines.)-.15 F 1.58
(If scrolling is not allo)6.58 F 1.58(wed, and the windo)-.25 F 4.08(we)-.25 G
1.58(ncompasses the lo)413.33 325.2 R(wer)-.25 E
(right-hand corner of the terminal, the corners are left blank to a)97 337.2 Q
-.2(vo)-.2 G(id a scroll.).2 E F3(cbreak)72 365.4 Q F1<28293b87>A
(Set or the terminal to cbreak mode.)97 381.6 Q F3(clear)72 409.8 Q F1
<28293b87>A 1.131(Resets the entire windo)97 426 R 3.631(wt)-.25 G 3.631(ob)
207.374 426 S 3.631(lanks. If)221.005 426 R F2(win)3.631 E F1 1.13
(is a screen, this sets the clear flag, which will cause a)3.631 F(clear)97 438
Q .469(-screen sequence to be sent on the ne)-.2 F(xt)-.15 E F3(refresh)2.969 E
F1 .469(\(\) call.)B .47(This also mo)5.469 F -.15(ve)-.15 G 2.97(st).15 G .47
(he current \(y)423.55 438 R 2.5(,x)-.65 G 2.97(\)c)484.93 438 S(o-)495.67 438
Q(ordinates to \(0, 0\).)97 450 Q F3(clearok)72 478.2 Q F1(\()A F2(WINDO)A(W)
-.5 E F4(*)2.5 E F2(scr)A F1(,)A F2(int boolf)2.5 E F1<293b87>A .444
(Sets the clear flag for the screen)97 494.4 R F2(scr)2.943 E F1 5.443(.I)C(f)
254.387 494.4 Q F2(boolf)2.943 E F1 .443(is non-zero, this will force a clear)
2.943 F .443(-screen to be printed)-.2 F 1.33(on the ne)97 506.4 R(xt)-.15 E F3