Forward-port some stuff from 0.x.

6 files changed, 49 insertions, 13 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..b9ad86f 100644
--- a/src/stl_binary_writer.cc
+++ b/src/stl_binary_writer.cc
@@ -192,8 +192,8 @@ sub::write_stl_binary (
 
 	output.write (buffer, 1024);
 
-	int N = 0;
 	for (list<Subtitle>::const_iterator i = subtitles.begin(); i != subtitles.end(); ++i) {
+		int N = 0;
 		for (list<Line>::const_iterator j = i->lines.begin(); j != i->lines.end(); ++j) {
 
 			memset (buffer, 0, 1024);
@@ -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;
@@ -295,6 +293,8 @@ sub::write_stl_binary (
 			
 			put_string (buffer + 16, text);
 			output.write (buffer, 128);
+
+			++N;
 		}
 	}
 
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 557a250..0aba120 100644
--- a/src/subrip_reader.cc
+++ b/src/subrip_reader.cc
@@ -83,9 +83,6 @@ SubripReader::SubripReader (FILE* f)
 		}
 		case CONTENT:
 			if (line.empty ()) {
-				/* XXX: I think this line_number should be set to some sensible value and TOP_OF_SUBTITLE
-				   should not be used.
-				*/
 				state = COUNTER;
 				line_number = 0;
 			} else {
@@ -135,6 +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..5f7d0d0 100644
--- a/src/vertical_position.cc
+++ b/src/vertical_position.cc
@@ -21,14 +21,44 @@
 
 using namespace sub;
 
+
+float
+VerticalPosition::fraction_from_screen_top () const
+{
+	if (!reference || (!proportional && !line)) {
+		return 0;
+	}
+
+	float const prop = proportional ? proportional.get() : (float (line.get()) / lines.get ());
+	
+	switch (reference.get ()) {
+	case TOP_OF_SCREEN:
+		return prop;
+	case CENTRE_OF_SCREEN:
+		return prop + 0.5;
+	case BOTTOM_OF_SCREEN:
+		return 1 - prop;
+	case TOP_OF_SUBTITLE:
+		return prop;
+	}
+
+	return 0;
+}
+
 bool
 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;
 }
+
+bool
+VerticalPosition::operator< (VerticalPosition const & other) const
+{
+	return fraction_from_screen_top() < other.fraction_from_screen_top();
+}
diff --git a/src/vertical_position.h b/src/vertical_position.h
index 1d0b939..9f04056 100644
--- a/src/vertical_position.h
+++ b/src/vertical_position.h
@@ -35,11 +35,15 @@ 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;
-	
+	bool operator< (VerticalPosition const & other) const;
+
+	float fraction_from_screen_top () const;
 };
 	
 }