From d8aca50e2ba6bfec052da5ab406899fa00fb607e Mon Sep 17 00:00:00 2001
From: Thomas White <taw@bitwiz.org.uk>
Date: Sun, 24 Apr 2016 13:49:44 +0200
Subject: Fixes for creating a new presentation

---
 src/colloquium.c       |  4 +++-
 src/narrative_window.c | 16 ++++++++++++++++
 src/presentation.c     |  2 ++
 src/sc_editor.c        |  6 ++++++
 src/sc_parse.c         |  1 +
 5 files changed, 28 insertions(+), 1 deletion(-)

diff --git a/src/colloquium.c b/src/colloquium.c
index ab3aa1a..52c831a 100644
--- a/src/colloquium.c
+++ b/src/colloquium.c
@@ -47,7 +47,9 @@ G_DEFINE_TYPE(Colloquium, colloquium, GTK_TYPE_APPLICATION)
 
 static void colloquium_activate(GApplication *app)
 {
-	printf("activate!\n");
+	struct presentation *p;
+	p = new_presentation();
+	narrative_window_new(p, app);
 }
 
 
diff --git a/src/narrative_window.c b/src/narrative_window.c
index 2c79185..6d4d21a 100644
--- a/src/narrative_window.c
+++ b/src/narrative_window.c
@@ -345,6 +345,13 @@ static void scroll_down(NarrativeWindow *nw)
 }
 
 
+static gboolean destroy_sig(GtkWidget *da, NarrativeWindow *nw)
+{
+	g_application_release(nw->app);
+	return FALSE;
+}
+
+
 static gboolean key_press_sig(GtkWidget *da, GdkEventKey *event,
                               NarrativeWindow *nw)
 {
@@ -489,6 +496,11 @@ NarrativeWindow *narrative_window_new(struct presentation *p, GApplication *app)
 		stylesheets[0] = narrative_stylesheet();
 		stylesheets[1] = NULL;
 	}
+
+	if ( nw->p->scblocks == NULL ) {
+		nw->p->scblocks = sc_parse("");
+	}
+
 	nw->sceditor = sc_editor_new(nw->p->scblocks, stylesheets, p->lang);
 	cbl = sc_callback_list_new();
 	sc_callback_list_add_callback(cbl, "sthumb", create_thumbnail,
@@ -567,11 +579,15 @@ NarrativeWindow *narrative_window_new(struct presentation *p, GApplication *app)
 	                 G_CALLBACK(button_press_sig), nw);
 	g_signal_connect(G_OBJECT(nw->sceditor), "key-press-event",
 			 G_CALLBACK(key_press_sig), nw);
+	g_signal_connect(G_OBJECT(nw->window), "destroy",
+			 G_CALLBACK(destroy_sig), nw);
 
 	gtk_window_set_default_size(GTK_WINDOW(nw->window), 768, 768);
 	gtk_box_pack_start(GTK_BOX(vbox), scroll, TRUE, TRUE, 0);
 
 	gtk_widget_show_all(nw->window);
+	nw->app = app;
+	g_application_hold(app);
 
 	return nw;
 }
diff --git a/src/presentation.c b/src/presentation.c
index 816f854..2d8efa6 100644
--- a/src/presentation.c
+++ b/src/presentation.c
@@ -109,6 +109,8 @@ struct presentation *new_presentation()
 	new->filename = NULL;
 	new->titlebar = get_titlebar_string(new);
 
+	new->scblocks = NULL;
+
 	new->slide_width = 1024.0;
 	new->slide_height = 768.0;
 
diff --git a/src/sc_editor.c b/src/sc_editor.c
index 625067f..251b154 100644
--- a/src/sc_editor.c
+++ b/src/sc_editor.c
@@ -814,6 +814,12 @@ static void check_paragraph(struct frame *fr, PangoContext *pc,
 	if ( fr->n_paras > 0 ) return;
 	Paragraph *para = last_open_para(fr);
 
+	if ( scblocks == NULL ) {
+		/* We have no SCBlocks at all!  Better create one... */
+		scblocks = sc_parse("");
+		fr->scblocks = scblocks;
+	}
+
 	/* We are creating the first paragraph.  It uses the last SCBlock
 	 * in the chain */
 	while ( sc_block_next(scblocks) != NULL ) {
diff --git a/src/sc_parse.c b/src/sc_parse.c
index c8eea6f..8265a13 100644
--- a/src/sc_parse.c
+++ b/src/sc_parse.c
@@ -296,6 +296,7 @@ static void recursive_show_sc_blocks(const char *prefix, const SCBlock *bl)
 void show_sc_block(const SCBlock *bl, const char *prefix)
 {
 	printf("%s (%p) ", prefix,  bl);
+	if ( bl == NULL ) return;
 	if ( bl->name != NULL ) printf("\\%s ", bl->name);
 	if ( bl->options != NULL ) printf("[%s] ", bl->options);
 	if ( bl->contents != NULL ) printf("{%s} ", bl->contents);
-- 
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