Mark overfull lines

3 files changed, 18 insertions, 1 deletions

diff --git a/src/render.c b/src/render.c
index b11b4fd..42898d8 100644
--- a/src/render.c
+++ b/src/render.c
@@ -123,6 +123,15 @@ static void render_lines(struct frame *fr, cairo_t *cr)
 		/* Render the line */
 		render_boxes(&fr->lines[i], cr);
 
+		if ( fr->lines[i].overfull ) {
+			cairo_move_to(cr, fr->w, 0.0);
+			cairo_line_to(cr, fr->w,
+			            pango_units_to_double(fr->lines[i].height));
+			cairo_set_source_rgb(cr, 1.0, 0.0, 0.0);
+			cairo_set_line_width(cr, 4.0);
+			cairo_stroke(cr);
+		}
+
 		/* FIXME: line spacing */
 		y_pos += pango_units_to_double(fr->lines[i].height) + 0.0;
 
diff --git a/src/wrap.c b/src/wrap.c
index 0343f11..67654ff 100644
--- a/src/wrap.c
+++ b/src/wrap.c
@@ -438,6 +438,7 @@ static void distribute_spaces(struct wrap_line *l, double w)
 	int i;
 	double total;
 	double sp;
+	int overfull = 0;
 
 	total = 0.0;
 	for ( i=0; i<l->n_boxes; i++ ) {
@@ -447,9 +448,15 @@ static void distribute_spaces(struct wrap_line *l, double w)
 	sp = (pango_units_from_double(w)-total) / (l->n_boxes-1);
 
 	for ( i=0; i<l->n_boxes-1; i++ ) {
-		l->boxes[i].sp = sp;
+		if ( sp < sp_zp(l->boxes[i].space) ) {
+			l->boxes[i].sp = sp_zp(l->boxes[i].space);
+			overfull = 1;
+		} else {
+			l->boxes[i].sp = sp;
+		}
 	}
 	l->boxes[l->n_boxes-1].sp = 0.0;
+	l->overfull = overfull;
 }
 
 
diff --git a/src/wrap.h b/src/wrap.h
index 91dcf6b..576ad10 100644
--- a/src/wrap.h
+++ b/src/wrap.h
@@ -87,6 +87,7 @@ struct wrap_line
 	int max_boxes;
 	struct wrap_box *boxes;
 
+	int overfull;
 	size_t sc_offset;
 };