From 683e72ae5fa90fd14101bd6ec8921468e96a50f5 Mon Sep 17 00:00:00 2001
From: Thomas White <taw@bitwiz.org.uk>
Date: Sun, 25 Dec 2011 23:56:20 +0000
Subject: Load and save the slide notes

---
 src/loadsave.c |  8 ++++-
 src/notes.c    | 94 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
 src/notes.h    |  3 ++
 3 files changed, 104 insertions(+), 1 deletion(-)

diff --git a/src/loadsave.c b/src/loadsave.c
index b85f4d0..a4c2891 100644
--- a/src/loadsave.c
+++ b/src/loadsave.c
@@ -36,6 +36,7 @@
 #include "stylesheet.h"
 #include "slide_render.h"
 #include "mainwindow.h"
+#include "notes.h"
 
 
 static int alloc_children(struct ds_node *node)
@@ -366,7 +367,6 @@ int get_field_s(struct ds_node *root, const char *key, char **val)
 
 	node = find_node(root, key, 0);
 	if ( node == NULL ) {
-		fprintf(stderr, "Couldn't find field '%s'\n", key);
 		*val = NULL;
 		return 1;
 	}
@@ -469,6 +469,8 @@ static struct slide *tree_to_slide(struct presentation *p, struct ds_node *root)
 	s = new_slide();
 	s->parent = p;
 
+	load_notes(root, s);
+
 	/* Loop over objects */
 	for ( i=0; i<root->n_children; i++ ) {
 
@@ -746,6 +748,7 @@ void serialize_end(struct serializer *ser)
 {
 	free(ser->stack[--ser->stack_depth]);
 	rebuild_prefix(ser);
+	ser->empty_set = 1;
 }
 
 
@@ -801,6 +804,9 @@ int save_presentation(struct presentation *p, const char *filename)
 			serialize_end(&ser);
 
 		}
+
+		write_notes(s, &ser);
+
 		serialize_end(&ser);
 
 	}
diff --git a/src/notes.c b/src/notes.c
index 026612b..58ca008 100644
--- a/src/notes.c
+++ b/src/notes.c
@@ -90,6 +90,100 @@ static gint close_notes_sig(GtkWidget *w, struct presentation *p)
 }
 
 
+static char *escape_text(const char *a)
+{
+	char *b;
+	size_t l1, l, i;
+
+	l1 = strlen(a);
+
+	b = malloc(2*l1 + 1);
+	l = 0;
+
+	for ( i=0; i<l1; i++ ) {
+
+		char c = a[i];
+
+		/* Yes, this is horribly confusing */
+		if ( c == '\n' ) {
+			b[l++] = '\\';  b[l++] = 'n';
+		} else if ( c == '\r' ) {
+			b[l++] = '\\';  b[l++] = 'r';
+		} else if ( c == '\"' ) {
+			b[l++] = '\\';  b[l++] = '\"';
+		} else if ( c == '\t' ) {
+			b[l++] = '\\';  b[l++] = 't';
+		} else {
+			b[l++] = c;
+		}
+
+	}
+	b[l++] = '\0';
+
+	return realloc(b, l);
+}
+
+
+static char *unescape_text(const char *a)
+{
+	char *b;
+	size_t l1, l, i;
+	int escape;
+
+	l1 = strlen(a);
+
+	b = malloc(l1 + 1);
+	l = 0;
+	escape = 0;
+
+	for ( i=0; i<l1; i++ ) {
+
+		char c = a[i];
+
+		if ( escape ) {
+			if ( c == 'r' ) b[l++] = '\r';
+			if ( c == 'n' ) b[l++] = '\n';
+			if ( c == '\"' ) b[l++] = '\"';
+			if ( c == 't' ) b[l++] = '\t';
+			escape = 0;
+			continue;
+		}
+
+		if ( c == '\\' ) {
+			escape = 1;
+			continue;
+		}
+
+		b[l++] = c;
+
+	}
+	b[l++] = '\0';
+
+	return realloc(b, l);
+}
+
+
+void write_notes(struct slide *s, struct serializer *ser)
+{
+	char *es;
+
+	es = escape_text(s->notes);
+	serialize_s(ser, "notes", es);
+	free(es);
+}
+
+
+void load_notes(struct ds_node *node, struct slide *s)
+{
+	char *v;
+
+	if ( get_field_s(node, "notes", &v) ) return;
+
+	s->notes = unescape_text(v);
+	free(v);
+}
+
+
 void open_notes(struct presentation *p)
 {
 	struct notes *n;
diff --git a/src/notes.h b/src/notes.h
index b739acb..f6fba5c 100644
--- a/src/notes.h
+++ b/src/notes.h
@@ -34,4 +34,7 @@ extern void open_notes(struct presentation *p);
 extern void notify_notes_slide_changed(struct presentation *p,
                                        struct slide *np);
 
+extern void write_notes(struct slide *s, struct serializer *ser);
+extern void load_notes(struct ds_node *node, struct slide *s);
+
 #endif	/* NOTES_H */
-- 
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