Add errptr for fz_highlight_selection to catch potential throws (messense#114)

Author: itsjunetime

mupdf-sys/wrapper.c

@@ -3205,3 +3205,17 @@ fz_bitmap *mupdf_new_bitmap_from_pixmap(fz_context *ctx, fz_pixmap *pixmap, mupd
     }
     return bitmap;
 }
+
+int32_t mupdf_highlight_selection(fz_context *ctx, fz_stext_page *page, fz_point a, fz_point b, fz_quad *quads, int max_quads, mupdf_error_t **errptr)
+{
+	int count = 0;
+	fz_try(ctx)
+	{
+		count = fz_highlight_selection(ctx, page, a, b, quads, max_quads);
+	}
+	fz_catch(ctx)
+	{
+		mupdf_save_error(ctx, errptr);
+	}
+	return count;
+}

src/text_page.rs

@@ -79,14 +79,14 @@ impl TextPage {
         let (ptr, len): (*const fz_quad, _) = rust_slice_to_ffi_ptr(quads)?;
 
         Ok(unsafe {
-            fz_highlight_selection(
+            ffi_try!(mupdf_highlight_selection(
                 context(),
                 self.inner,
                 a.into(),
                 b.into(),
-                ptr as *mut _,
-                len,
-            )
+                ptr as *mut fz_quad,
+                len
+            ))
         })
     }
 }