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Diffstat (limited to 'src/cmd/svgpic/textgen.c')
-rw-r--r--src/cmd/svgpic/textgen.c111
1 files changed, 111 insertions, 0 deletions
diff --git a/src/cmd/svgpic/textgen.c b/src/cmd/svgpic/textgen.c
new file mode 100644
index 00000000..082f8ee0
--- /dev/null
+++ b/src/cmd/svgpic/textgen.c
@@ -0,0 +1,111 @@
+#include <stdio.h>
+#include "pic.h"
+#include "y.tab.h"
+
+obj *textgen(void)
+{
+ int i, sub, nstr, at, with, hset, invis;
+ double xwith, ywith, h, w, x0, y0, x1, y1;
+ obj *p, *ppos;
+ Attr *ap;
+
+ at = with = nstr = hset = invis = 0;
+ h = getfval("textht");
+ w = getfval("textwid");
+ for (i = 0; i < nattr; i++) {
+ ap = &attr[i];
+ switch (ap->a_type) {
+ case HEIGHT:
+ h = ap->a_val.f;
+ hset++;
+ break;
+ case WIDTH:
+ w = ap->a_val.f;
+ break;
+ case WITH:
+ with = ap->a_val.i;
+ break;
+ case INVIS:
+ invis = INVIS;
+ break;
+ case AT:
+ ppos = ap->a_val.o;
+ curx = ppos->o_x;
+ cury = ppos->o_y;
+ at++;
+ break;
+ case TEXTATTR:
+ sub = ap->a_sub;
+ if (ap->a_val.p == NULL) /* an isolated modifier */
+ text[ntext-1].t_type = sub;
+ else {
+ savetext(sub, ap->a_val.p);
+ nstr++;
+ }
+ break;
+ }
+ }
+ if (hset == 0) /* no explicit ht cmd */
+ h *= nstr;
+ if (with) {
+ xwith = ywith = 0.0;
+ switch (with) {
+ case NORTH: ywith = -h / 2; break;
+ case SOUTH: ywith = h / 2; break;
+ case EAST: xwith = -w / 2; break;
+ case WEST: xwith = w / 2; break;
+ case NE: xwith = -w / 2; ywith = -h / 2; break;
+ case SE: xwith = -w / 2; ywith = h / 2; break;
+ case NW: xwith = w / 2; ywith = -h / 2; break;
+ case SW: xwith = w / 2; ywith = h / 2; break;
+ }
+ curx += xwith;
+ cury += ywith;
+ }
+ if (!at) {
+ if (isright(hvmode))
+ curx += w / 2;
+ else if (isleft(hvmode))
+ curx -= w / 2;
+ else if (isup(hvmode))
+ cury += h / 2;
+ else
+ cury -= h / 2;
+ }
+ x0 = curx - w / 2;
+ y0 = cury - h / 2;
+ x1 = curx + w / 2;
+ y1 = cury + h / 2;
+ extreme(x0, y0);
+ extreme(x1, y1);
+ dprintf("Text h %g w %g at %g,%g\n", h, w, curx, cury);
+ p = makenode(TEXT, 2);
+ p->o_attr = invis;
+ p->o_val[0] = w;
+ p->o_val[1] = h;
+ if (isright(hvmode))
+ curx = x1;
+ else if (isleft(hvmode))
+ curx = x0;
+ else if (isup(hvmode))
+ cury = y1;
+ else
+ cury = y0;
+ return(p);
+}
+
+obj *troffgen(char *s) /* save away a string of troff commands */
+{
+ savetext(CENTER, s); /* use the existing text mechanism */
+ return makenode(TROFF, 0);
+}
+
+void savetext(int t, char *s) /* record text elements for current object */
+{
+ if (ntext >= ntextlist)
+ text = (Text *) grow((char *) text, "text", ntextlist += 200, sizeof(Text));
+ text[ntext].t_type = t;
+ text[ntext].t_val = s;
+ dprintf("saving %d text %s at %d\n", t, s, ntext);
+ ntext++;
+}