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authorKristaps Dzonsons <kristaps@bsd.lv>2010-07-04 10:53:04 +0000
committerKristaps Dzonsons <kristaps@bsd.lv>2010-07-04 10:53:04 +0000
commit49dd9b5dd748b620a0ce6f13386ed83f152ae465 (patch)
treef518dcb5362be40e925497da92dc83aa5f110aa0 /term_ps.c
parent21ba8ecaf2eb2e4488cba5975c67d6c6e63fa069 (diff)
downloadmandoc-49dd9b5dd748b620a0ce6f13386ed83f152ae465.tar.gz
Auto-margins. Documented in mandoc.1. Also bumped line-height and made
sure header and footer accomodate for said line-height.
Diffstat (limited to 'term_ps.c')
-rw-r--r--term_ps.c51
1 files changed, 39 insertions, 12 deletions
diff --git a/term_ps.c b/term_ps.c
index 8d630c39..b9097e6c 100644
--- a/term_ps.c
+++ b/term_ps.c
@@ -33,6 +33,11 @@
#include "main.h"
#include "term.h"
+#define MINMARGIN_MM 20 /* Minimum 2cm margins. */
+#define MINMARGIN_PNT 56.68
+#define DEFPAGEX_MM 216 /* Default page size is US-letter. */
+#define DEFPAGEY_MM 279
+
/* Convert PostScript point "x" to an AFM unit. */
#define PNT2AFM(p, x) /* LINTED */ \
(size_t)((double)(x) * (1000.0 / (double)(p)->engine.ps.scale))
@@ -388,7 +393,7 @@ void *
ps_alloc(char *outopts)
{
struct termp *p;
- size_t pagex, pagey, margin, lineheight;
+ size_t pagex, pagey, margin, lineheight, m1, m2;
const char *toks[2];
const char *pp;
char *v;
@@ -405,8 +410,6 @@ ps_alloc(char *outopts)
p->type = TERMTYPE_PS;
p->width = ps_width;
- p->engine.ps.scale = 11;
-
toks[0] = "paper";
toks[1] = NULL;
@@ -421,13 +424,10 @@ ps_alloc(char *outopts)
break;
}
- margin = PNT2AFM(p, 72);
- lineheight = PNT2AFM(p, 12);
-
/* Default to US letter (millimetres). */
- pagex = 216;
- pagey = 279;
+ pagex = DEFPAGEX_MM;
+ pagey = DEFPAGEY_MM;
/*
* The ISO-269 paper sizes can be calculated automatically, but
@@ -451,21 +451,48 @@ ps_alloc(char *outopts)
pagey = 356;
} else if (2 != sscanf(pp, "%zux%zu", &pagex, &pagey))
fprintf(stderr, "%s: Unknown paper\n", pp);
+ } else if (NULL == pp)
+ pp = "letter";
+
+ /* Enforce minimum page size >= (2 times) min-margin. */
+
+ if ((2 * MINMARGIN_MM) >= pagex) {
+ fprintf(stderr, "%s: Insufficient page width\n", pp);
+ pagex = DEFPAGEX_MM;
+ } else if ((2 * MINMARGIN_MM >= pagey)) {
+ fprintf(stderr, "%s: Insufficient page length\n", pp);
+ pagey = DEFPAGEY_MM;
}
+ /*
+ * This MUST be defined before any PNT2AFM or AFM2PNT
+ * calculations occur.
+ */
+
+ p->engine.ps.scale = 11;
+
/* Remember millimetres -> AFM units. */
pagex = PNT2AFM(p, ((double)pagex * 2.834));
pagey = PNT2AFM(p, ((double)pagey * 2.834));
- assert(margin * 2 < pagex);
- assert(margin * 2 < pagey);
+ /*
+ * Calculate margins. First get the minimum text width: either
+ * page minus margins or width of 65 'm' characters. Set total
+ * margins to page size minus text width.
+ */
+
+ m1 = ps_width(p, 'm') * 65;
+ m2 = pagex - (2 * PNT2AFM(p, MINMARGIN_PNT));
+ margin = (pagex - (m1 < m2 ? m1 : m2)) / 2;
+
+ lineheight = PNT2AFM(p, 16);
p->engine.ps.width = pagex;
p->engine.ps.height = pagey;
- p->engine.ps.header = pagey - (margin / 2);
+ p->engine.ps.header = pagey - (margin / 2) - (lineheight / 2);
p->engine.ps.top = pagey - margin;
- p->engine.ps.footer = (margin / 2);
+ p->engine.ps.footer = (margin / 2) - (lineheight / 2);
p->engine.ps.bottom = margin;
p->engine.ps.left = margin;
p->engine.ps.lineheight = lineheight;