From 9c4933dfe7306080056beaaff99c27991a7c473d Mon Sep 17 00:00:00 2001
From: Thomas White <taw@bitwiz.org.uk>
Date: Wed, 9 Nov 2011 00:19:04 +0100
Subject: Fix and rationalise update/redraw logic

---
 src/tool_text.c | 32 +++++++++++++++++++++++++++++---
 1 file changed, 29 insertions(+), 3 deletions(-)

(limited to 'src/tool_text.c')

diff --git a/src/tool_text.c b/src/tool_text.c
index b22a466..7b9d377 100644
--- a/src/tool_text.c
+++ b/src/tool_text.c
@@ -73,6 +73,8 @@ struct text_object
 	double                offs_x;
 	double                offs_y;
 	int                   furniture;
+
+	PangoContext        **pc;
 };
 
 
@@ -192,6 +194,15 @@ static void update_text(struct text_object *o)
 	double mw = 0.0;
 	double mh = 0.0;
 
+	if ( o->layout == NULL ) {
+		if ( *o->pc != NULL ) {
+			o->layout = pango_layout_new(*o->pc);
+		} else {
+			/* Can't render yet */
+			return;
+		}
+	}
+
 	o->furniture = o->base.style != o->base.parent->parent->ss->styles[0];
 
 	pango_layout_set_text(o->layout, o->text, -1);
@@ -223,8 +234,6 @@ static void update_text(struct text_object *o)
 	if ( o->furniture ) {
 		calculate_position_from_style(o, eright, ebottom, mw, mh);
 	}
-
-	redraw_slide(((struct object *)o)->parent);
 }
 
 
@@ -270,6 +279,7 @@ void insert_text(struct object *op, char *t)
 	free(tmp);
 
 	update_text(o);
+	redraw_slide(op->parent);
 	o->insertion_point += tlen;
 	o->base.empty = 0;
 }
@@ -324,6 +334,7 @@ void handle_text_backspace(struct object *op)
 	if ( strlen(o->text) == 0 ) o->base.empty = 1;
 
 	update_text(o);
+	redraw_slide(op->parent);
 }
 
 
@@ -332,6 +343,10 @@ static void render_text_object(cairo_t *cr, struct object *op)
 	struct text_object *o = (struct text_object *)op;
 	GdkColor col;
 
+	if ( o->layout == NULL ) {
+		return;
+	}
+
 	cairo_move_to(cr, o->base.x - o->offs_x, o->base.y - o->offs_y);
 	gdk_color_parse(o->base.style->colour, &col);
 	gdk_cairo_set_source_color(cr, &col);  /* FIXME: Honour alpha as well */
@@ -433,7 +448,13 @@ static struct object *new_text_object(double x, double y, struct style *sty,
 	new->text_len = 1;
 	new->insertion_point = 0;
 	new->insertion_trail = 0;
-	new->layout = pango_layout_new(ti->pc);
+	if ( ti->pc != NULL ) {
+		new->layout = pango_layout_new(ti->pc);
+		new->pc = NULL;
+	} else {
+		new->layout = NULL;
+		new->pc = &ti->pc;
+	}
 	new->fontdesc = NULL;
 
 	/* Methods for this object */
@@ -584,6 +605,7 @@ static void end_drag(struct toolinfo *tip, struct presentation *p,
 	o->bb_width = ti->box_width;
 	o->bb_height = ti->box_height;
 	update_text((struct text_object *)o);
+	redraw_slide(o->parent);
 
 	ti->drag_reason = TEXT_DRAG_REASON_NONE;
 }
@@ -600,6 +622,7 @@ static void create_default(struct presentation *p, struct style *sty,
 	o = (struct text_object *)n;
 	o->furniture = 1;
 	update_text(o);
+	redraw_slide(((struct object *)o)->parent);
 	p->editing_object = n;
 }
 
@@ -621,6 +644,7 @@ static void create_region(struct toolinfo *tip, struct presentation *p,
 	o->furniture = 0;
 
 	update_text(o);
+	redraw_slide(((struct object *)o)->parent);
 	p->editing_object = n;
 }
 
@@ -818,6 +842,8 @@ struct toolinfo *initialise_text_tool(GtkWidget *w)
 	ti->base.realise = realise;
 	ti->base.deserialize = deserialize;
 
+	ti->pc = NULL;
+
 	ti->drag_reason = DRAG_REASON_NONE;
 
 	return (struct toolinfo *)ti;
-- 
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