From 46497c450854d0dfee60d8b64e141a303f4e99b3 Mon Sep 17 00:00:00 2001
From: Juan Linietsky <reduzio@gmail.com>
Date: Thu, 10 Dec 2015 23:02:40 -0300
Subject: [PATCH] added fallbacks proprty to fonts

---
 scene/resources/font.cpp | 43 ++++++++++++++++++++--------------------
 scene/resources/font.h   | 12 +++++++++--
 2 files changed, 32 insertions(+), 23 deletions(-)

diff --git a/scene/resources/font.cpp b/scene/resources/font.cpp
index 2d93113b405..aad5e7cfddc 100644
--- a/scene/resources/font.cpp
+++ b/scene/resources/font.cpp
@@ -462,31 +462,16 @@ void Font::draw_halign(RID p_canvas_item, const Point2& p_pos, HAlign p_align,fl
 
 void Font::draw(RID p_canvas_item, const Point2& p_pos, const String& p_text, const Color& p_modulate,int p_clip_w) const {
 		
-	Point2 pos=p_pos;
-	float ofs=0;
-	VisualServer *vs = VisualServer::get_singleton();
+	Vector2 ofs;
 	
 	for (int i=0;i<p_text.length();i++) {
 
-		const Character * c = char_map.getptr(p_text[i]);
+		int width = get_char_size(p_text[i]).width;
 
-		if (!c)
-			continue;
-			
-//		if (p_clip_w>=0 && (ofs+c->rect.size.width)>(p_clip_w))
-//			break; //width exceeded
-
-		if (p_clip_w>=0 && (ofs+c->rect.size.width)>p_clip_w)
+		if (p_clip_w>=0 && (ofs.x+width)>p_clip_w)
 			break; //clip
-		Point2 cpos=pos;
-		cpos.x+=ofs+c->h_align;
-		cpos.y-=ascent;
-		cpos.y+=c->v_align;
-		ERR_CONTINUE( c->texture_idx<-1 || c->texture_idx>=textures.size());
-		if (c->texture_idx!=-1)
-			textures[c->texture_idx]->draw_rect_region( p_canvas_item, Rect2( cpos, c->rect.size ), c->rect, p_modulate );
-		
-		ofs+=get_char_size(p_text[i],p_text[i+1]).width;
+
+		ofs.x+=draw_char(p_canvas_item,p_pos+ofs,p_text[i],p_text[i+1],p_modulate);
 	}
 }
 
@@ -494,8 +479,11 @@ float Font::draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_
 	
 	const Character * c = char_map.getptr(p_char);
 	
-	if (!c)
+	if (!c) {
+		if (fallback.is_valid())
+			return fallback->draw_char(p_canvas_item,p_pos,p_char,p_next,p_modulate);
 		return 0;
+	}
 	
 	Point2 cpos=p_pos;
 	cpos.x+=c->h_align;
@@ -508,6 +496,16 @@ float Font::draw_char(RID p_canvas_item, const Point2& p_pos, const CharType& p_
 	return get_char_size(p_char,p_next).width;
 }
 
+void Font::set_fallback(const Ref<Font> &p_fallback) {
+
+	fallback=p_fallback;
+}
+
+Ref<Font> Font::get_fallback() const{
+
+	return fallback;
+}
+
 void Font::_bind_methods() {
 
 	ObjectTypeDB::bind_method(_MD("create_from_fnt","path"),&Font::create_from_fnt);
@@ -548,6 +546,8 @@ void Font::_bind_methods() {
 	ObjectTypeDB::bind_method(_MD("_set_textures"),&Font::_set_textures);
 	ObjectTypeDB::bind_method(_MD("_get_textures"),&Font::_get_textures);
 
+	ObjectTypeDB::bind_method(_MD("set_fallback","fallback"),&Font::set_fallback);
+	ObjectTypeDB::bind_method(_MD("get_fallback"),&Font::get_fallback);
 
 	ADD_PROPERTY( PropertyInfo( Variant::ARRAY, "textures", PROPERTY_HINT_NONE,"", PROPERTY_USAGE_NOEDITOR ), _SCS("_set_textures"), _SCS("_get_textures") );
 	ADD_PROPERTY( PropertyInfo( Variant::INT_ARRAY, "chars", PROPERTY_HINT_NONE,"", PROPERTY_USAGE_NOEDITOR ), _SCS("_set_chars"), _SCS("_get_chars") );
@@ -556,6 +556,7 @@ void Font::_bind_methods() {
 	ADD_PROPERTY( PropertyInfo( Variant::REAL, "height", PROPERTY_HINT_RANGE,"-1024,1024,1" ), _SCS("set_height"), _SCS("get_height") );
 	ADD_PROPERTY( PropertyInfo( Variant::REAL, "ascent", PROPERTY_HINT_RANGE,"-1024,1024,1" ), _SCS("set_ascent"), _SCS("get_ascent") );
 	ADD_PROPERTY( PropertyInfo( Variant::BOOL, "distance_field" ), _SCS("set_distance_field_hint"), _SCS("is_distance_field_hint") );
+	ADD_PROPERTY( PropertyInfo( Variant::OBJECT, "fallback", PROPERTY_HINT_RESOURCE_TYPE,"Font" ), _SCS("set_fallback"), _SCS("get_fallback") );
 
 }
 
diff --git a/scene/resources/font.h b/scene/resources/font.h
index 6728b59f8ec..27e3045eaa0 100644
--- a/scene/resources/font.h
+++ b/scene/resources/font.h
@@ -84,6 +84,7 @@ private:
 	void _set_textures(const Vector<Variant> & p_textures);
 	Vector<Variant> _get_textures() const;
 
+	Ref<Font> fallback;
 protected:
 	
 	static void _bind_methods();
@@ -113,9 +114,13 @@ public:
 	int get_kerning_pair(CharType p_A,CharType p_B) const;
 	Vector<KerningPairKey> get_kerning_pair_keys() const;
 
-	_FORCE_INLINE_ Size2 get_char_size(CharType p_char,CharType p_next=0) const;
+	inline Size2 get_char_size(CharType p_char,CharType p_next=0) const;
 	Size2 get_string_size(const String& p_string) const;
 	
+
+	void set_fallback(const Ref<Font> &p_fallback);
+	Ref<Font> get_fallback() const;
+
 	void clear();
 
 	void set_distance_field_hint(bool p_distance_field);
@@ -134,8 +139,11 @@ Size2 Font::get_char_size(CharType p_char,CharType p_next) const {
 
 	const Character * c = char_map.getptr(p_char);
 
-	if (!c)
+	if (!c) {
+		if (fallback.is_valid())
+			return fallback->get_char_size(p_char,p_next);
 		return Size2();
+	}
 
 	Size2 ret(c->advance,c->rect.size.y);