Made symbol font size and alignment scriptable.

doc/type/symbol_font_reference.txt

@@ -10,9 +10,9 @@ In [[type:stylesheet]]s the symbol fonts are not included inline, instead they a
 ! Property		Type					Default			Description
 | @name@		[[type:scriptable]] Name of a [[type:symbol font]]
 			 					''required''		Name of the symbol font package to use (without the extension).
-| @size@		[[type:double]]		12			Size in points to render the symbols with.
+| @size@		[[type:scriptable]] [[type:double]]	12			Size in points to render the symbols with.
 | @scale down to@	[[type:double]]				1			Minimum size in points to scale the size down to.
-| @alignment@		[[type:alignment]]	@"middle center"@	Alignment of symbols in a line of text.
+| @alignment@		[[type:scriptable]] [[type:alignment]]	@"middle center"@	Alignment of symbols in a line of text.
 
 --Example--
 >symbol font:

src/data/symbol_font.cpp

@@ -550,17 +550,22 @@ bool SymbolFontRef::valid() const {
 }
 
 bool SymbolFontRef::update(Context& ctx) {
+	bool changes = false;
 	if (name.update(ctx)) {
 		// font name changed, load another font
 		loadFont(ctx);
-		return true;
-	} else {
-		if (!font) loadFont(ctx);
-		return false;
+		changes = true;
+	} else if (!font) {
+		loadFont(ctx);
 	}
+	changes |= size.update(ctx);
+	changes |= alignment.update(ctx);
+	return changes;
 }
 void SymbolFontRef::initDependencies(Context& ctx, const Dependency& dep) const {
 	name.initDependencies(ctx, dep);
+	size.initDependencies(ctx, dep);
+	alignment.initDependencies(ctx, dep);
 }
 
 void SymbolFontRef::loadFont(Context& ctx) {

src/data/symbol_font.hpp

@@ -155,9 +155,9 @@ class SymbolFontRef {
 	bool valid() const;
 		
 	Scriptable<String>    name;				///< Font package name, can be changed with script
-	double             size;			///< Size of the font
+	Scriptable<double>    size;				///< Size of the font
 	double                scale_down_to;	///< Mimumum size of the font
-	Alignment          alignment;		///< Alignment of symbols in a line of text
+	Scriptable<Alignment> alignment;		///< Alignment of symbols in a line of text
 	SymbolFontP           font;				///< The font, if it is loaded
 	
   private:

src/render/text/symbol.cpp

@@ -26,7 +26,7 @@ void SymbolTextElement::getCharInfo(RotatedDC& dc, double scale, vector<CharInfo
 }
 
 double SymbolTextElement::minScale() const {
-	return min(font.size, font.scale_down_to) / max(0.01, font.size);
+	return min(font.size(), font.scale_down_to) / max(0.01, font.size());
 }
 double SymbolTextElement::scaleStep() const {
 	return 1. / max(font.size * 4, 1.);