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-
-
- /*
- * With the -u option, TeX \special commands are used to include
- * PostScript commands into the PS file created by the PS driver
- * (dvi2ps, psdvi, dvips, dvitops, or whatever). The driver should
- * not attempt repositioning or anything -- just copy to its output.
- * Some drivers may not be willing to do this, and others may need
- * the \special to begin with a certain keyword before they will do it.
- * Here is a list of those keywords I know about:
- * "ps-string "
- * "ps-string="
- * "ps::"
- * "pstext="
- * The following define is for this keyword; it might have to be set
- * to one of the above. (My version of dvi2ps does not require a
- * keyword.)
- */
- #ifndef SKEY
- #define SKEY "ps::"
- #endif
-
- /*
- * Dimensions are in terms of em and ex (of the current font), with
- * basic values assuming cmr 10, which has 1em = 10pt, 1ex = 4.31pt.
- *
- * Each character or space is reckoned to be 1/2 em, which is the
- * width of a digit in the cmr fonts. However, each `col' unit in
- * the tree is a half-space wide -- 1/4 em, that is.
- *
- * The normal width of rules is .4pt, which becomes .04em.
- * The height of lines is that of a TeX \strut: 8.5pt above the
- * baseline and 3.5pt below, and in ex units:
- * 8.5pt/4.31=1.972ex
- * 3.5pt/4.31=0.81206ex
- * The horizontal bars made of "underlines" have vertical dimension
- * starting 3.5pt below the baseline and going up .4pt to:
- * 3.1pt/4.31=0.71925ex
- * The ones made of "overlines" go to 8.5pt and start .4pt lower:
- * 8.1pt/4.31=1.87935ex
- * Rule width is .4pt/4.31 = .09280742ex.
- */
-
- float hskip = 0; /* amount to hskip before next box or bar */
-
- dohskip () {
- /* must emit this even when hskip is 0 to get out of
- * vertical mode before an \hbox
- */
- printf ("\\hskip %.2fem", hskip);
- hskip = 0;
- }
-
- /* record keeping for lines connecting discontinuous constituents */
- int m_ulabel[11];
- int d_ulabel[11];
-
- /*
- * Keep track of the attributes from the \M and \D label
- * commands. For the first of a matching pair, save our treeid
- * in the ulabel array and issue PS commands to define the current
- * (x,y) coordinates with names corresponding to the treeid. For
- * the second of a matching pair, issue PS commands to draw a
- * line back to the previous location.
- */
- setiattrib(node, is_daughter)
- TREE node;
- int *is_daughter;
- {
- int type = node->type;
- int iattrib = 0;
-
- if (type == VBAR && (iattrib = has(node,'D')) ) {
- /* this is a daughter label */
- *is_daughter = TRUE;
- /* ... unless we're in an inverted tree */
- /*if (node->mother && node->mother->type == OBAR)*/
- if (has(node,'U') == 'i')
- *is_daughter = FALSE;
- if (iattrib == '+') iattrib = 10;
- else iattrib -= '0';
- d_ulabel[iattrib] = node->treeid;
- /* if known already, get old treeid in iattrib, otherwise
- * note with "-1" that current location must be defined
- */
- if (m_ulabel[iattrib]) iattrib = m_ulabel[iattrib];
- else iattrib = -1;
- }
- else if ((type==HBAR || type==VBAR || type==OBAR)
- && (iattrib = has(node,'M'))) {
- /* this is a mother label */
- *is_daughter = FALSE;
- /* ... unless we're an OBAR: */
- if (type == OBAR) *is_daughter = TRUE;
- if (type == VBAR && has(node,'U') == 'i') *is_daughter = TRUE;
- if (iattrib == '+') iattrib = 10;
- else iattrib -= '0';
- m_ulabel[iattrib] = node->treeid;
- if (d_ulabel[iattrib]) iattrib = d_ulabel[iattrib];
- else iattrib = -1;
- }
-
- if (debug_opt) printf("%% note iattrib %d\n", iattrib);
-
- return(iattrib);
- }
-
-
-
- /* TeX height and depth to be used in current line for strut, etc. */
- float h, d;
- /* used only in following routine, except also set in print_tex_tree */
- int curr_row = -1;
- /* look at entire row to see what the smallest height and depth we can
- * get away with are
- */
- static
- set_hd (node)
- TREE node;
- { int row_type = 0;
- int top_row = node->row;
-
- if (top_row == curr_row) return;
- curr_row = top_row;
- while (node && (node->row == top_row)) {
- row_type |= node->type;
- node = node->right;
- }
- if (row_type & NODENAME) {
- if (debug_opt) printf("%% Next row needs a full size strut.\n");
- h = 1.972;
- d = .812;
- }
- else {
- /* Make rows without text for node names about 2/3 of normal size.
- */
- if (debug_opt) printf("%% Setting height + depth to 2 ex's.\n");
- h = 1.5;
- d = .5;
- }
- }
-
-
- /* Generate PS code for Bezier curve connecting discontinuous
- * constituents (needs work). This has to be independent of scale
- * or translation of coordinate system, since the PS driver may
- * have changed these.
- */
- curvegen(sf, is_daughter)
- char *sf;
- int is_daughter;
- {
- if (is_daughter) printf("\\lower%1.3fex",d);
- else printf("\\raise%1.3fex",h);
-
- printf("\\hbox{\\special{%scurrentpoint ",SKEY);
-
- /* Daughter is at, say, (DX,DY) and mother at (MX,MY);
- * if we're now at the daughter, we need to calculate two
- * inflexion points, somehow. (Even though the PS variable
- * is called "mom", if we're at a mother node, it's actually
- * a daughter.)
- */
- if (is_daughter) {
- printf("currentpoint pop mom%sy ",sf); /* (DX,MY) */
- printf("mom%sx currentpoint exch pop ",sf); /* (MX, (DY+MY)/2 ) */
- printf("mom%sy add 2 div ",sf);
- }
- else {
- /* We're at the mother, and the first inflexion point has to bend
- * us down, then the second has be up above the daughter so we hit
- * it going more or less downward.
- */
- /* cpx */
- printf("currentpoint pop ");
- /* cpy 2 mul dy sub */
- printf("currentpoint exch pop 2 mul mom%sy sub ",sf);
- /* (MX, MY*2 - DY) */
- /* dx */
- printf("mom%sx ",sf);
- /* dy 2 mul cpy sub */
- printf("mom%sy 2 mul currentpoint exch pop sub ",sf);
- /* (DX, DY*2 - MY) */
- /* dx dy */
- }
- /* and wind up at (DX,DY) or (MX,MY) */
- printf("mom%sx mom%sy curveto stroke ",sf,sf);
-
- printf("moveto}}%%\n");
- }
-
- char m[4], n[4];
- /* m and n are suffixes for PS identifiers initialized here for
- * later use. m is for local lines; n is for discontinuous
- * constituent lines requested through labels
- */
- setsuffix(s, id)
- char *s;
- int id;
- {
- s[0] = 'a'; s[1] = 'a'; s[2] = 'a'; s[3] = '\0';
- s[0] += id / (26*26);
- s[1] += (id / 26) % 26;
- s[2] += id % 26;
- }
-
- char *whichbar[] = {
- "",
- "\\big\\Vert",
- "\\big\\downarrow",
- "\\big\\Downarrow",
- "\\big\\uparrow",
- "\\big\\Uparrow",
- "\\big\\updownarrow",
- "\\diamondsuit",
- "\\triangle",
- ""
- };
- char *whichobar[] = {
- "",
- "\\big\\Vert",
- "\\big\\uparrow",
- "\\big\\Uparrow",
- "\\big\\downarrow",
- "\\big\\Downarrow",
- "\\big\\updownarrow",
- "\\diamondsuit",
- "\\nabla",
- ""
- };
-
- int greyness;
-
- /* The vertical bars start horizontally half way through a
- * character space and go .4pt further to the right. For the
- * -u option, issue PS to draw a line to the previously defined
- * position under the node name above. (For upside down trees,
- * the position over the node name below is unfortunately not yet
- * defined -- haven't figured out what to do about that -- not
- * sure I care enough.)
- */
- texvbar(node, iattrib, r, is_daughter)
- TREE node;
- int iattrib, is_daughter;
- float r;
- { TREE mom = node->mother;
- int do_a_line = FALSE,
- do_a_bar = FALSE,
- do_a_tbar = FALSE,
- do_nothing = FALSE,
- def_a_sister = FALSE,
- def_an_osister = FALSE,
- def_a_mother = FALSE,
- do_a_triangle = FALSE,
- do_a_box = FALSE,
- do_an_obox = FALSE;
-
- do_a_line = (utex_opt && mom && mom->type == HBAR);
- if (mom && mom->row > node->row) do_a_line = FALSE;
-
- def_an_osister = (!has(node,'O') && utex_opt
- && mom && mom->type == OBAR);
- if (def_an_osister) {
- def_a_sister = TRUE;
- if (has(node,'S') == 'f' || has(node,'S') == 'o')
- mom->left = node;
- if (has(node,'S') == 'o') def_a_mother = TRUE;
- }
-
- if (do_a_line && has(node,'T') && !has(node,'B')) {
- if (has(node,'S') == 'f' || has(node,'S') == 'o')
- def_a_sister = TRUE;
- if (has(node,'S') == 'o' || has(node,'S') == 'l')
- do_a_triangle = TRUE;
- if (!do_a_triangle && !def_a_sister) do_nothing = TRUE;
- }
-
- if (has(node,'O') || has(node,'P')) do_nothing = TRUE;
- if (iattrib && utex_opt) do_nothing = FALSE;
- if (utex_opt && iattrib == -1) def_a_mother = TRUE;
- do_a_bar = (!do_a_line && !do_nothing && !def_an_osister);
- if (has(node,'B')) do_a_bar = TRUE;
- if (do_a_bar && has(node,'T')) {
- if (has(node,'S') == 'f' || has(node,'S') == 'o') {
- if (mom && mom->type == OBAR) do_an_obox = TRUE;
- /*else if (mom && node == mom->daughter) do_a_box = TRUE;*/
- else /*if (mom && node == mom->daughter)*/ do_a_box = TRUE;
- do_nothing = TRUE;
- }
- else do_nothing = TRUE;
- }
- if (has(node,'O') || has(node,'P')) do_a_bar = FALSE;
- if (do_a_bar && (!utex_opt || has(node,'B')) && whichbar[b][0]) {
- do_a_tbar = TRUE;
- do_a_bar = FALSE;
- }
-
- hskip += .25;
-
- if (do_a_box || do_an_obox) {
- TREE first = node, last;
- int len;
- while (node->sister
- && node->mother == node->sister->mother
- && has(node,'S') != 'l'
- && has(node,'S') != 'o'
- && node->sister->type == VBAR) {
- node->mother = NULL;
- node = node->sister;
- }
- last = node;
- last->mother = NULL;
- if (first != last) {
- len = last->col + last->l - first->col;
- r = len;
- r /= COLMUL;
- }
- dohskip();
- printf ("\\vrule width.04em");
- hskip -= .04;
- if (greyness) {
- printf ("\\xleaders\\hbox to .%dem{\\hss$\\",
- greyness);
- if (do_a_box) printf("Down");
- else printf("Up");
- printf ("arrow$\\hss}\\hskip%.2fem\n",
- r/2 - .50 - .04);
- }
- else {
- if (do_a_box)
- printf ("\\vrule width%.2fem height%1.3fex depth%1.3fex%%\n",
- r/2 - .50 - .04, .09281 - d, d);
- else
- printf ("\\vrule width%.2fem height%1.3fex depth%1.3fex%%\n",
- r/2 - .50 - .04, h, .09281 - h);
- }
- if (first != last) hskip -= (r/2 - .50);
- printf ("\\vrule width.04em");
- }
-
-
-
- if (do_nothing) {
- hskip += .25;
- return;
- }
- dohskip();
- if (do_a_bar) {
- printf ("\\vrule width.04em%%\n");
- hskip -= .04;
- }
- if (do_a_line) {
- setsuffix(m, mom->treeid);
- printf("\\lower%1.3fex\\hbox{\\special{%scurrentpoint",d,SKEY);
- }
- if (def_an_osister) {
- setsuffix(m, node->treeid);
- printf("\\raise%1.3fex\\hbox{\\special{%scurrentpoint",h,SKEY);
- }
- if (def_a_sister)
- printf(" /sis%sy exch def /sis%sx exch def}}%%\n",m,m);
- if (do_a_triangle) {
- if (def_a_sister) {
- hskip += r/2 - .75;
- dohskip();
- hskip += .25;
- printf("\\lower%1.3fex\\hbox{",d);
- printf("\\special{%scurrentpoint",SKEY);
- }
- printf(" sis%sx sis%sy lineto mom%sx mom%sy lineto",m,m,m,m);
- printf(" closepath");
- if (greyness)
- printf(" .%d setgray fill 0 setgray", greyness);
- else printf(" stroke");
- }
- if (do_a_line && !do_a_tbar && !def_a_sister && !do_a_triangle
- && !do_a_bar && !has(node,'O') && !has(node,'P'))
- printf(" mom%sx mom%sy lineto stroke",m,m);
-
- if (do_a_line && (do_a_triangle || !def_a_sister)) {
- printf(" moveto}}%%\n");
- }
- if (def_a_mother) {
- if (def_an_osister) {
- hskip += r/2 - .75;
- dohskip();
- hskip += .25;
- is_daughter = FALSE;
- }
- setsuffix(n, node->treeid);
- if (is_daughter) printf("\\lower%1.3fex",d);
- else printf("\\raise%1.3fex",h);
- printf("\\hbox{\\special{%s currentpoint",SKEY);
- printf(" /mom%sy exch def /mom%sx exch def}}%%\n",n,n);
- }
- if (utex_opt && iattrib > 0) {
- setsuffix(n, iattrib);
- curvegen(n, is_daughter);
- }
- if (do_a_tbar) {
- hskip -= .25 - .04;
- dohskip();
- printf("\\hbox to 0.5em{\\hss$%s$\\hss}%%\n",
- (has(node,'U') == 'i')? whichobar[b] : whichbar[b]);
- hskip -= .25 + .04;
- }
-
- hskip += .25;
- }
-
-
-
- /* Horizontal bars also start half way through a space.
- * They have a vertical bar in the center and extend .4pt
- * further than half way through a character space at the
- * end to cap the vertical bar that will come below.
- * For the -u option, instead of rules, generate PS code
- * to remember the coordinates under the node name above, so
- * later can draw line from daughters back to here.
- */
- texhbar(node, iattrib, r, rm, is_daughter)
- TREE node;
- int iattrib, is_daughter;
- float r, rm;
- { TREE mom = node->mother;
-
- if (utex_opt && !has(node,'B')) {
- /* REVISE HERE */
- /* rm/2 + (r - rm)/2 = rm/2 + r/2 - rm/2 = r/2 */
-
- hskip += rm/2 + .25;
- dohskip ();
- if (debug_opt) printf("%% Here is mom [%d]\n", node->treeid);
- printf("\\raise%1.3fex\\hbox{\\special{%scurrentpoint",h,SKEY);
- setsuffix(m, node->treeid);
- printf(" /mom%sy exch def /mom%sx exch def}}%%\n",m,m);
- if (iattrib > 0) {
- setsuffix(n, iattrib);
- curvegen(n, is_daughter);
- }
- hskip += (r - rm)/2 - .25;
- } else {
- float w;
- hskip += .25;
- dohskip ();
- if (b == 9 && r >= 6)
- printf("\\hbox to %.2fem{\\downbracefill}%%\n",
- r/2 - .50 + .04);
- else if (!node->mother)
- printf ("\\vrule width%.2fem height%1.3fex depth%1.3fex%%\n",
- r/2 - .50 + .04, .09281 - d, d);
- else {
- if ((w = rm/2) > .01)
- printf ("\\vrule width%.2fem height%1.3fex depth%1.3fex%%\n",
- w, .09281 - d, d);
- printf ("\\vrule width.04em");
- if ((w = r/2 - w - .50) > .01)
- printf ("\\vrule width%.2fem height%1.3fex depth%1.3fex%%\n",
- w, .09281 - d, d);
- }
- hskip += .25 -.04;
- }
- }
-
-
-
- texobar(node, iattrib, r, rm, is_daughter)
- TREE node;
- int iattrib, is_daughter;
- float r, rm;
- {
- /* "left" is actually a pointer up to first daughter */
- if (utex_opt && !has(node,'B') && node->left && node->left->mother == node
- && node->left->type == VBAR) {
- TREE sis = node->left;
- hskip += rm/2 + .25;
- dohskip ();
- if (debug_opt) printf("%% Here is bottom pt [%d]\n", node->treeid);
- printf("\\lower%1.3fex\\hbox{\\special{%scurrentpoint",d,SKEY);
-
- if (iattrib == -1) {
- setsuffix(n, node->treeid);
- printf(" currentpoint /mom%sy exch def /mom%sx exch def",n,n);
- }
-
- while (sis && sis->mother == node) {
- if (has(sis,'O') || has(sis,'P')) {
- sis = sis->sister;
- continue;
- }
- setsuffix(m, sis->treeid);
- if (has(node,'T')) {
- if (has(node,'S') == 'f'
- || has(node,'S') == 'l'
- || has(node,'S') == 'o')
- printf(" sis%sx sis%sy lineto",m,m);
- }
- else printf(" currentpoint sis%sx sis%sy lineto moveto",m,m);
- if (has(node,'T') && has(node,'S') == 'o')
- printf(" mom%sx mom%sy lineto",m,m);
- sis = sis->sister;
- }
- if (has(node,'T')) {
- printf(" closepath");
- if (greyness)
- printf(" .%d setgray fill 0 setgray", greyness);
- else printf(" stroke");
- }
- else printf(" stroke");
- printf(" moveto}}%%\n");
- if (iattrib > 0) {
- setsuffix(n, iattrib);
- curvegen(n, is_daughter);
- }
- hskip += (r - rm)/2 - .25;
-
- }
- else {
- float w;
- hskip += .25;
- dohskip ();
- if (b == 9 && r >= 6)
- printf("\\hbox to %.2fem{\\upbracefill}%%\n",
- r/2 - .50 + .04);
- else if (node->mother && node->right) {
- if ((w = rm/2) > .01)
- printf ("\\vrule width%.2fem height%1.3fex depth%1.3fex%%\n",
- w, h, .09281 - h);
- printf ("\\vrule width.04em");
- if ((w = r/2 - w - .50) > .01)
- printf ("\\vrule width%.2fem height%1.3fex depth%1.3fex%%\n",
- w, h, .09281 - h);
- }
- else printf ("\\vrule width%.2fem height%1.3fex depth%1.3fex%%\n",
- r/2 - .50 + .04, h, .09281 - h);
- hskip += .25 - .04;
- }
- }
-
- texnodename(node, r)
- TREE node;
- float r;
- {
- if (has(node,'P')) hskip += r/2;
- else {
- dohskip ();
- if (has(node,'R'))
- printf ("\\hbox to %.2fem{\\hss{%s}}%%\n",
- r/2, node->n);
- else printf ("\\hbox to %.2fem{\\hss{%s}\\hss}%%\n",
- r/2, node->n);
- }
- }
-
- /* emit TeX code for a bar or a box containing a node name */
- boxitup (node)
- TREE node;
- {
- float r = node->l, rm;
- int iattrib = 0;
- int is_daughter;
- int i;
- TREE mom = node->mother;
-
- if (b = has(node,'B')) {
- if (b == '+') b = 9;
- else if (isdigit(b)) b -= '0';
- else b = 0;
- greyness = b;
- }
- else {
- for (b = black_opt; b > 10; b /= 10) ;
- for (greyness = black_opt; greyness >= 100; greyness /= 10);
- }
- if (greyness > 9) greyness = 100 - greyness;
- else if (greyness) greyness = 10 - greyness;
-
- if (mom && node != mom->daughter && node->sister) mom = NULL;
-
- /* set height and depth for raising and lowering and for strut
- * at end of line
- */
- set_hd(node);
-
- iattrib = setiattrib(node, &is_daughter);
-
- /* halve width to compensate for doubling col values */
- r /= COLMUL;
- i = node->mid;
- if (COLMUL > 2) i /= (COLMUL/2);
- rm = i;
- if (COLMUL > 1) rm /= 2;
-
- /* now generate TeX code for VBARs, HBARs, and NODENAMEs */
- switch(node->type) {
- case VBAR: texvbar(node, iattrib, r, is_daughter);
- break;
- case HBAR: texhbar(node, iattrib, r, rm, is_daughter);
- break;
- case OBAR: texobar(node, iattrib, r, rm, is_daughter);
- break;
- case NODENAME: texnodename(node, r);
- break;
- }
- }
-
-
- /* Like preceding routine tex(), except collect spaces and
- * emit globs of TeX \hskip, \hbox, and \vrule commands (for
- * respectively space, node names, and tree lines).
- */
- tex(tree)
- TREE tree;
- {
- int row = tree->row,
- col = 0,
- i;
-
- hskip = (float) indent / 2;
-
- /* mark all labels as undefined */
- for (i = 0; i < 11; i++) {
- m_ulabel[i] = 0;
- d_ulabel[i] = 0;
- }
- /* make sure set_hd looks at first row */
- curr_row = -1;
-
- /* Each line of the tree will be a paragraph, so prevent white space
- * breaking up segments of vertical rules; put a strut at the
- * end of each line to make it high enough. I'm not using regular
- * \strut commands, because my own TeX code is not careful about
- * keeping \strut defined appropriately for the font in use.
- */
- printf ("\n\n{\\parskip=0pt\\offinterlineskip%%\n");
-
- while (1) {
- if (!tree) {
- printf ("\\vrule width0em height%1.3fex depth%1.3fex",h,d);
- printf ("\\par}\n");
- bufp = buf; /* can reuse string buffer for next tree */
- /* (could free malloc'd memory for tree nodes, too) */
- return;
- }
- if (tree->row > row) {
- /* Put a strut at the end of each line. The height and
- * depth were determined by set_hd, called by boxitup.
- */
- printf ("\\vrule width0em height%1.3fex depth%1.3fex",h,d);
- /* prevent page breaks in midst of tree */
- printf ("\\par\\penalty10000\n");
- row++;
- col = 0;
- hskip = (float) indent / 2;
- }
- else if ((tree->row == row)
- && (tree->col == col)) {
- boxitup(tree);
- col += tree->l;
- tree = tree->right;
- }
- else {
- /* to advance one column, hskip 1/4 em, which is only 1/2
- * en space, since we doubled all the col values
- */
- hskip +=.50/COLMUL;
- col++;
- }
- }
- }
-