From ed8491f8c5710ad8901021a12c3b187e29201f71 Mon Sep 17 00:00:00 2001
From: Carl Hetherington <cth@carlh.net>
Date: Tue, 16 Dec 2014 11:16:48 +0000
Subject: [PATCH] Save and load subtitle font details.

---
 src/lib/font.cc             | 45 +++++++++++++++++++++++++++++++++++++
 src/lib/font.h              |  9 ++++++++
 src/lib/subtitle_content.cc | 32 ++++++++++++++++++++++++++
 src/lib/wscript             |  1 +
 4 files changed, 87 insertions(+)
 create mode 100644 src/lib/font.cc

diff --git a/src/lib/font.cc b/src/lib/font.cc
new file mode 100644
index 000000000..bf7a79a3d
--- /dev/null
+++ b/src/lib/font.cc
@@ -0,0 +1,45 @@
+/*
+    Copyright (C) 2014 Carl Hetherington <cth@carlh.net>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#include "font.h"
+#include <libxml++/libxml++.h>
+
+Font::Font (cxml::NodePtr node)
+{
+	id = node->optional_string_child ("Id");
+	file = node->optional_string_child ("File");
+}
+
+void
+Font::as_xml (xmlpp::Node* node)
+{
+	if (id) {
+		node->add_child("Id")->add_child_text (id.get ());
+	}
+
+	if (file) {
+		node->add_child("File")->add_child_text (file.get().string ());
+	}
+}
+
+bool
+operator!= (Font const & a, Font const & b)
+{
+	return (a.id != b.id || a.file != b.file);
+}
diff --git a/src/lib/font.h b/src/lib/font.h
index 59d983277..7a26eefc9 100644
--- a/src/lib/font.h
+++ b/src/lib/font.h
@@ -17,6 +17,7 @@
 
 */
 
+#include <libcxml/cxml.h>
 #include <boost/optional.hpp>
 #include <boost/filesystem.hpp>
 #include <string>
@@ -25,10 +26,18 @@ class Font
 {
 public:
 	Font () {}
+
 	Font (std::string id_)
 		: id (id_) {}
+
+	Font (cxml::NodePtr node);
+
+	void as_xml (xmlpp::Node* node);
 	
 	/** Font ID, or empty for the default font */
 	boost::optional<std::string> id;
 	boost::optional<boost::filesystem::path> file;
 };
+
+bool
+operator!= (Font const & a, Font const & b);
diff --git a/src/lib/subtitle_content.cc b/src/lib/subtitle_content.cc
index f6bceb753..6f9bdf3a4 100644
--- a/src/lib/subtitle_content.cc
+++ b/src/lib/subtitle_content.cc
@@ -23,12 +23,14 @@
 #include "util.h"
 #include "exceptions.h"
 #include "safe_stringstream.h"
+#include "font.h"
 
 #include "i18n.h"
 
 using std::string;
 using std::vector;
 using std::cout;
+using std::list;
 using boost::shared_ptr;
 using boost::dynamic_pointer_cast;
 using dcp::raw_convert;
@@ -92,6 +94,11 @@ SubtitleContent::SubtitleContent (shared_ptr<const Film> f, cxml::ConstNodePtr n
 	}
 
 	_subtitle_language = node->optional_string_child ("SubtitleLanguage").get_value_or ("");
+
+	list<cxml::NodePtr> fonts = node->node_children ("Font");
+	for (list<cxml::NodePtr>::const_iterator i = fonts.begin(); i != fonts.end(); ++i) {
+		_fonts.push_back (shared_ptr<Font> (new Font (*i)));
+	}
 }
 
 SubtitleContent::SubtitleContent (shared_ptr<const Film> f, vector<shared_ptr<Content> > c)
@@ -99,6 +106,7 @@ SubtitleContent::SubtitleContent (shared_ptr<const Film> f, vector<shared_ptr<Co
 {
 	shared_ptr<SubtitleContent> ref = dynamic_pointer_cast<SubtitleContent> (c[0]);
 	assert (ref);
+	list<shared_ptr<Font> > ref_fonts = ref->fonts ();
 	
 	for (size_t i = 0; i < c.size(); ++i) {
 		shared_ptr<SubtitleContent> sc = dynamic_pointer_cast<SubtitleContent> (c[i]);
@@ -122,6 +130,22 @@ SubtitleContent::SubtitleContent (shared_ptr<const Film> f, vector<shared_ptr<Co
 		if (sc->subtitle_y_scale() != ref->subtitle_y_scale()) {
 			throw JoinError (_("Content to be joined must have the same subtitle Y scale."));
 		}
+
+		list<shared_ptr<Font> > fonts = sc->fonts ();
+		if (fonts.size() != ref_fonts.size()) {
+			throw JoinError (_("Content to be joined must use the same fonts."));
+		}
+
+		list<shared_ptr<Font> >::const_iterator j = ref_fonts.begin ();
+		list<shared_ptr<Font> >::const_iterator k = fonts.begin ();
+
+		while (j != ref_fonts.end ()) {
+			if (**j != **k) {
+				throw JoinError (_("Content to be joined must use the same fonts."));
+			}
+			++j;
+			++k;
+		}
 	}
 
 	_use_subtitles = ref->use_subtitles ();
@@ -130,17 +154,25 @@ SubtitleContent::SubtitleContent (shared_ptr<const Film> f, vector<shared_ptr<Co
 	_subtitle_x_scale = ref->subtitle_x_scale ();
 	_subtitle_y_scale = ref->subtitle_y_scale ();
 	_subtitle_language = ref->subtitle_language ();
+	_fonts = ref_fonts;
 }
 
+/** _mutex must not be held on entry */
 void
 SubtitleContent::as_xml (xmlpp::Node* root) const
 {
+	boost::mutex::scoped_lock lm (_mutex);
+	
 	root->add_child("UseSubtitles")->add_child_text (raw_convert<string> (_use_subtitles));
 	root->add_child("SubtitleXOffset")->add_child_text (raw_convert<string> (_subtitle_x_offset));
 	root->add_child("SubtitleYOffset")->add_child_text (raw_convert<string> (_subtitle_y_offset));
 	root->add_child("SubtitleXScale")->add_child_text (raw_convert<string> (_subtitle_x_scale));
 	root->add_child("SubtitleYScale")->add_child_text (raw_convert<string> (_subtitle_y_scale));
 	root->add_child("SubtitleLanguage")->add_child_text (_subtitle_language);
+
+	for (list<shared_ptr<Font> >::const_iterator i = _fonts.begin(); i != _fonts.end(); ++i) {
+		(*i)->as_xml (root->add_child("Font"));
+	}
 }
 
 void
diff --git a/src/lib/wscript b/src/lib/wscript
index 7edd5dcdf..ca6a49375 100644
--- a/src/lib/wscript
+++ b/src/lib/wscript
@@ -42,6 +42,7 @@ sources = """
           ffmpeg_subtitle_stream.cc
           film.cc
           filter.cc
+          font.cc
           frame_rate_change.cc
           internet.cc
           image.cc
-- 
2.30.2