Sketchy support for total line counts when describing vertical position as a line number.

6 files changed, 13 insertions, 9 deletions

diff --git a/src/stl_binary_reader.cc b/src/stl_binary_reader.cc
index ff3d9a0..2246a01 100644
--- a/src/stl_binary_reader.cc
+++ b/src/stl_binary_reader.cc
@@ -98,6 +98,7 @@ STLBinaryReader::STLBinaryReader (istream& in)
 			sub.from.set_frame (get_timecode (5));
 			sub.to.set_frame (get_timecode (9));
 			sub.vertical_position.line = get_int (13, 1) + i;
+			sub.vertical_position.lines = maximum_rows;
 			sub.vertical_position.reference = TOP_OF_SCREEN;
 
 			string text;
diff --git a/src/stl_binary_writer.cc b/src/stl_binary_writer.cc
index aa9a032..fcdc5fe 100644
--- a/src/stl_binary_writer.cc
+++ b/src/stl_binary_writer.cc
@@ -235,18 +235,16 @@ sub::write_stl_binary (
 					break;
 				}
 			} else if (j->vertical_position.line) {
-				/* XXX: how many lines are there...?  We need to correct for any difference
-				   between the number of lines and our ROWS.
-				*/
+				float const prop = float (j->vertical_position.line.get()) / j->vertical_position.lines.get ();
 				switch (j->vertical_position.reference.get_value_or (TOP_OF_SCREEN)) {
 				case TOP_OF_SCREEN:
-					vp = j->vertical_position.line.get();
+					vp = prop * ROWS;
 					break;
 				case CENTRE_OF_SCREEN:
-					vp = j->vertical_position.line.get() + (ROWS / 2);
+					vp = (prop + 0.5) * ROWS;
 					break;
 				case BOTTOM_OF_SCREEN:
-					vp = ROWS - (j->vertical_position.line.get());
+					vp = (1 - prop) * ROWS;
 					break;
 				default:
 					break;
diff --git a/src/stl_text_reader.cc b/src/stl_text_reader.cc
index 3c60e41..b86a656 100644
--- a/src/stl_text_reader.cc
+++ b/src/stl_text_reader.cc
@@ -39,6 +39,8 @@ using namespace sub;
 STLTextReader::STLTextReader (istream& in)
 {
 	_subtitle.vertical_position.line = 0;
+	/* XXX: no idea what this should be */
+	_subtitle.vertical_position.lines = 32;
 	_subtitle.vertical_position.reference = TOP_OF_SCREEN;
 	
 	while (in.good ()) {
diff --git a/src/subrip_reader.cc b/src/subrip_reader.cc
index 8bd2005..0aba120 100644
--- a/src/subrip_reader.cc
+++ b/src/subrip_reader.cc
@@ -132,6 +132,8 @@ SubripReader::convert_line (string t, int line_number, TimePair from, TimePair t
 	p.from = from;
 	p.to = to;
 	p.vertical_position.line = line_number;
+	/* XXX: arbitrary */
+	p.vertical_position.lines = 32;
 	p.vertical_position.reference = TOP_OF_SUBTITLE;
 	
 	/* XXX: missing <font> support */
diff --git a/src/vertical_position.cc b/src/vertical_position.cc
index 1fdb1e1..cdf0b6c 100644
--- a/src/vertical_position.cc
+++ b/src/vertical_position.cc
@@ -26,8 +26,8 @@ VerticalPosition::operator== (VerticalPosition const & other) const
 {
 	if (proportional && reference && other.proportional && other.reference) {
 		return proportional.get() == other.proportional.get() && reference.get() == other.reference.get();
-	} else if (reference && line && other.reference && other.line) {
-		return line.get() == other.line.get() && reference.get() == other.reference.get();
+	} else if (reference && line && lines && other.reference && other.line && other.lines) {
+		return line.get() == other.line.get() && lines.get() == other.lines.get() && reference.get() == other.reference.get();
 	}
 
 	return false;
diff --git a/src/vertical_position.h b/src/vertical_position.h
index 1d0b939..77b0675 100644
--- a/src/vertical_position.h
+++ b/src/vertical_position.h
@@ -35,11 +35,12 @@ public:
 	boost::optional<float> proportional;
 	/** line number offset from some reference point */
 	boost::optional<int> line;
+	/** number of lines on the whole screen (i.e. height of the screen in lines) */
+	boost::optional<int> lines;
 	/** reference point */
 	boost::optional<VerticalReference> reference;
 	
 	bool operator== (VerticalPosition const & other) const;
-	
 };
 	
 }