1 files changed, 36 insertions, 0 deletions
diff --git a/src/pdf.c b/src/pdf.c
index c6ae876..5718ed7 100644
--- a/src/pdf.c
+++ b/src/pdf.c
@@ -353,6 +353,42 @@ double pdf_font_ascent(const char *font, double size)
     return size > 0 ? size * PDF_ASCENT / 1000.0 : 0.0;
 }
 
+void pdf_text_fit(struct pdf *p, double x, double baseline, const char *font,
+                  double size, double min_size, double max_w, const char *rgb,
+                  const char *utf8)
+{
+    char *truncated = NULL;
+    const char *text = utf8;
+    double w;
+
+    if (!utf8 || !*utf8 || max_w <= 0)
+        return;
+    w = pdf_text_width(font, size, utf8);
+    if (w > max_w) {
+        size = size * max_w / w;
+        if (size < min_size)
+            size = min_size;
+        w = pdf_text_width(font, size, utf8);
+    }
+    if (w > max_w) {
+        size_t n = strlen(utf8);
+
+        truncated = xmalloc(n + 4);
+        memcpy(truncated, utf8, n);
+        while (n > 0) {
+            memcpy(truncated + n, "...", 4);
+            if (pdf_text_width(font, size, truncated) <= max_w)
+                break;
+            n--;
+            while (n > 0 && ((unsigned char)truncated[n] & 0xC0) == 0x80)
+                n--;
+        }
+        text = truncated;
+    }
+    pdf_text(p, x, baseline, font, size, rgb, text);
+    free(truncated);
+}
+
 static int parse_num(const char **sp, double *out)
 {
     const char *s = *sp;