1 /* shift.c 4.1 83/02/11 */ 2 3 # include "e.h" 4 #include "e.def" 5 6 bshiftb(p1, dir, p2) int p1, dir, p2; { 7 int shval, diffps, effps, effps2, d1, h1, b1, h2, b2; 8 char *sh1, *sh2; 9 10 yyval = p1; 11 h1 = eht[p1]; 12 b1 = ebase[p1]; 13 h2 = eht[p2]; 14 b2 = ebase[p2]; 15 effps = EFFPS(ps); 16 effps2 = EFFPS(ps+deltaps); 17 diffps = deltaps; 18 sh1 = sh2 = ""; 19 if( dir == SUB ) { 20 /* top 1/2m above bottom of main box */ 21 d1 = VERT( (effps2*6)/2 ); 22 shval = - d1 + h2 - b2; 23 if( d1+b1 > h2 ) /* move little sub down */ 24 shval = b1-b2; 25 ebase[yyval] = b1 + max(0, h2-b1-d1); 26 eht[yyval] = h1 + max(0, h2-b1-d1); 27 if (rfont[p1] == ITAL && lfont[p2] == ROM) 28 sh1 = "\\|"; 29 if (rfont[p2] == ITAL) 30 sh2 = "\\|"; 31 } else { /* superscript */ 32 /* 4/10 up main box */ 33 d1 = VERT( (effps*6*2)/10 ); 34 ebase[yyval] = b1; 35 shval = -VERT( (4 * (h1-b1)) / 10 ) - b2; 36 if( VERT(4*(h1-b1)/10) + h2 < h1-b1 ) /* raise little super */ 37 shval = -(h1-b1) + h2-b2 - d1; 38 eht[yyval] = h1 + max(0, h2-VERT((6*(h1-b1))/10)); 39 if (rfont[p1] == ITAL) 40 sh1 = "\\|"; 41 if (rfont[p2] == ITAL) 42 sh2 = "\\|"; 43 } 44 if(dbg)printf(".\tb:b shift b: S%d <- S%d vert %d S%d vert %d; b=%d, h=%d\n", 45 yyval, p1, shval, p2, -shval, ebase[yyval], eht[yyval]); 46 printf(".as %d \\v'%du'\\s-%d%s\\*(%d\\s+%d%s\\v'%du'\n", 47 yyval, shval, diffps, sh1, p2, diffps, sh2, -shval); 48 ps += deltaps; 49 if (rfont[p2] == ITAL) 50 rfont[p1] = 0; 51 else 52 rfont[p1] = rfont[p2]; 53 ofree(p2); 54 } 55 56 shift(p1) int p1; { 57 ps -= deltaps; 58 yyval = p1; 59 if(dbg)printf(".\tshift: %d;ps=%d\n", yyval, ps); 60 } 61 62 shift2(p1, p2, p3) int p1, p2, p3; { 63 int effps, effps2, h1, h2, h3, b1, b2, b3, subsh, d1, d2, supsh; 64 int treg; 65 treg = oalloc(); 66 yyval = p1; 67 if(dbg)printf(".\tshift2 s%d <- %d %d %d\n", yyval, p1, p2, p3); 68 effps = EFFPS(ps+deltaps); 69 eht[p3] = h3 = VERT( (eht[p3] * effps) / EFFPS(ps) ); 70 ps += deltaps; 71 effps2 = EFFPS(ps+deltaps); 72 h1 = eht[p1]; b1 = ebase[p1]; 73 h2 = eht[p2]; b2 = ebase[p2]; 74 b3 = ebase[p3]; 75 d1 = VERT( (effps2*6)/2 ); 76 subsh = -d1+h2-b2; 77 if( d1+b1 > h2 ) /* move little sub down */ 78 subsh = b1-b2; 79 supsh = -VERT( (4*(h1-b1))/10 ) - b3; 80 d2 = VERT( (effps*6*2)/10 ); 81 if( VERT(4*(h1-b1)/10)+h3 < h1-b1 ) 82 supsh = -(h1-b1) + (h3-b3) - d2; 83 eht[yyval] = h1 + max(0, h3-VERT( (6*(h1-b1))/10 )) + max(0, h2-b1-d1); 84 ebase[yyval] = b1+max(0, h2-b1-d1); 85 if (rfont[p1] == ITAL && lfont[p2] == ROM) 86 printf(".ds %d \\|\\*(%d\n", p2, p2); 87 if (rfont[p2] == ITAL) 88 printf(".as %d \\|\n", p2); 89 nrwid(p2, effps, p2); 90 if (rfont[p1] == ITAL && lfont[p3] == ROM) 91 printf(".ds %d \\|\\|\\*(%d\n", p3, p3); 92 else 93 printf(".ds %d \\|\\*(%d\n", p3, p3); 94 nrwid(p3, effps, p3); 95 printf(".nr %d \\n(%d\n", treg, p3); 96 printf(".if \\n(%d>\\n(%d .nr %d \\n(%d\n", p2, treg, treg, p2); 97 printf(".as %d \\v'%du'\\s%d\\*(%d\\h'-\\n(%du'\\v'%du'\\\n", 98 p1, subsh, effps, p2, p2, -subsh+supsh); 99 printf("\\s%d\\*(%d\\h'-\\n(%du+\\n(%du'\\s%d\\v'%du'\n", 100 effps, p3, p3, treg, effps2, -supsh); 101 ps += deltaps; 102 if (rfont[p2] == ITAL) 103 rfont[yyval] = 0; /* lie */ 104 ofree(p2); ofree(p3); ofree(treg); 105 } 106