From 0caaf01a78f0eef53b4fd0f51434f302d40dd975 Mon Sep 17 00:00:00 2001
From: twanvl <twanvl@0fc631ac-6414-0410-93d0-97cfa31319b6>
Date: Mon, 30 Oct 2006 21:39:58 +0000
Subject: [PATCH] Implemented the context management part of the ScriptManager

git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@61 0fc631ac-6414-0410-93d0-97cfa31319b6
---
 src/data/field.cpp            |  9 +++-
 src/data/field.hpp            | 11 +++-
 src/data/game.cpp             |  6 ++-
 src/data/game.hpp             |  9 +++-
 src/data/set.cpp              | 52 +++++++++++++++++--
 src/data/set.hpp              |  6 ++-
 src/data/stylesheet.cpp       |  8 +++
 src/data/stylesheet.hpp       | 15 +++---
 src/gfx/resample_image.cpp    | 10 ++--
 src/mse.vcproj                |  3 ++
 src/render/value/viewer.cpp   |  3 +-
 src/script/dependency.cpp     |  3 ++
 src/script/dependency.hpp     | 39 ++++++++++++++
 src/script/script_manager.cpp | 95 ++++++++++++++++++++++++++++++++++-
 src/script/script_manager.hpp | 41 ++++++---------
 src/script/scriptable.cpp     |  6 +++
 src/script/scriptable.hpp     |  9 +++-
 src/script/value.hpp          |  6 +--
 src/util/io/package.cpp       |  1 +
 src/util/io/package.hpp       |  2 +-
 src/util/io/reader.cpp        |  8 +--
 src/util/io/reader.hpp        |  4 +-
 22 files changed, 288 insertions(+), 58 deletions(-)
 create mode 100644 src/script/dependency.hpp

diff --git a/src/data/field.cpp b/src/data/field.cpp
index 915790db..81826812 100644
--- a/src/data/field.cpp
+++ b/src/data/field.cpp
@@ -71,7 +71,6 @@ shared_ptr<Field> read_new<Field>(Reader& reader) {
 	}
 }
 
-
 // ----------------------------------------------------------------------------- : Style
 
 Style::Style(const FieldP& field)
@@ -100,6 +99,14 @@ template <> StyleP read_new<Style>(Reader&) {
 	throw InternalError(_("IndexMap contains nullptr StyleP the application should have crashed already"));
 }
 
+void Style::initDependencies(Context& ctx, const Dependency& dep) const {
+	left   .initDependencies(ctx,dep);
+	top    .initDependencies(ctx,dep);
+	width  .initDependencies(ctx,dep);
+	height .initDependencies(ctx,dep);
+	visible.initDependencies(ctx,dep);
+}
+
 // ----------------------------------------------------------------------------- : Value
 
 Value::~Value() {}
diff --git a/src/data/field.hpp b/src/data/field.hpp
index acf919ea..098f4b1d 100644
--- a/src/data/field.hpp
+++ b/src/data/field.hpp
@@ -13,10 +13,13 @@
 #include <util/reflect.hpp>
 #include <util/alignment.hpp>
 #include <script/scriptable.hpp>
+#include <script/dependency.hpp>
 
 DECLARE_POINTER_TYPE(Field);
 DECLARE_POINTER_TYPE(Style);
 DECLARE_POINTER_TYPE(Value);
+class Context;
+class Dependency;
 
 // for DataViewer/editor
 class DataViewer; class DataEditor;
@@ -44,7 +47,7 @@ class Field {
 	String    card_list_name;   ///< Alternate name to use in card list.
 	Alignment card_list_align;  ///< Alignment of the card list colummn.
 	int       tab_index;        ///< Tab index in editor
-//	vector<Dependency> dependentScripts; // scripts that depend on values of this field
+	vector<Dependency> dependent_scripts; ///< Scripts that depend on values of this field
 	
 	/// Creates a new Value corresponding to this Field
 	/** thisP is a smart pointer to this */
@@ -55,6 +58,9 @@ class Field {
 	/// Type of this field
 	virtual String typeName() const = 0;
 	
+	/// Add the given dependency to the dependet_scripts list for the variables this field depends on
+	virtual void initDependencies(Context&, const Dependency&) const {}
+	
   private:
 	DECLARE_REFLECTION_VIRTUAL();
 };
@@ -90,6 +96,9 @@ class Style {
 	/** thisP is a smart pointer to this */
 	virtual ValueEditorP makeEditor(DataEditor& parent, const StyleP& thisP) = 0;
 	
+	/// Add the given dependency to the dependet_scripts list for the variables this style depends on
+	virtual void initDependencies(Context&, const Dependency&) const;
+	
   private:
 	DECLARE_REFLECTION_VIRTUAL();
 };
diff --git a/src/data/game.cpp b/src/data/game.cpp
index 7198dd9c..39b70628 100644
--- a/src/data/game.cpp
+++ b/src/data/game.cpp
@@ -16,6 +16,10 @@
 
 IMPLEMENT_DYNAMIC_ARG(Game*, game_for_reading, nullptr);
 
+Game::Game()
+	: dependencies_initialized(false)
+{}
+
 GameP Game::byName(const String& name) {
 	return packages.open<Game>(name + _(".mse-game"));
 }
@@ -48,7 +52,7 @@ IMPLEMENT_REFLECTION(Game) {
 //	REFLECT(word_lists);
 }
 
-void Game::validate() {
+void Game::validate(Version) {
 	// a default for the full name
 	if (full_name.empty()) full_name = name();
 }
diff --git a/src/data/game.hpp b/src/data/game.hpp
index bd56937b..1db2948c 100644
--- a/src/data/game.hpp
+++ b/src/data/game.hpp
@@ -12,6 +12,7 @@
 #include <util/prec.hpp>
 #include <util/io/package.hpp>
 #include <script/scriptable.hpp>
+#include <script/dependency.hpp>
 #include <util/dynamic_arg.hpp>
 
 DECLARE_POINTER_TYPE(Field);
@@ -25,12 +26,18 @@ DECLARE_DYNAMIC_ARG(Game*, game_for_reading);
 /// A description of a card game
 class Game : public Packaged {
   public:
+	Game();
+	
 	String full_name;				///< Name of this game, for menus etc.
 	String icon_filename;			///< Filename of icon to use in NewWindow
 	OptionalScript init_script;		///< Script of variables available to other scripts in this game
 	vector<FieldP> set_fields;		///< Fields for set information
 	vector<FieldP> card_fields;		///< Fields on each card
 	
+	vector<Dependency> dependent_scripts_cards;		///< scripts that depend on the card list
+	vector<Dependency> dependent_scripts_keywords;	///< scripts that depend on the keywords
+	bool dependencies_initialized;					///< are the script dependencies comming from this game all initialized?
+	
 	/// Loads the game with a particular name, for example "magic"
 	static GameP byName(const String& name);
 	
@@ -43,7 +50,7 @@ class Game : public Packaged {
 	virtual InputStreamP openIconFile();
 	
   protected:
-	void validate();
+	virtual void validate(Version);
 	
 	DECLARE_REFLECTION();
 };
diff --git a/src/data/set.cpp b/src/data/set.cpp
index 36cb1841..7d7fb614 100644
--- a/src/data/set.cpp
+++ b/src/data/set.cpp
@@ -11,32 +11,78 @@
 #include <data/stylesheet.hpp>
 #include <data/card.hpp>
 #include <data/field.hpp>
+#include <data/field/text.hpp> // for 0.2.7 fix
 #include <script/value.hpp>
 #include <script/script_manager.hpp>
 
+DECLARE_TYPEOF_COLLECTION(CardP);
+typedef IndexMap<FieldP,ValueP> IndexMap_FieldP_ValueP;
+DECLARE_TYPEOF_NO_REV(IndexMap_FieldP_ValueP);
+
 // ----------------------------------------------------------------------------- : Set
 
-Set::Set() {}
+Set::Set()
+	: script_manager(new ScriptManager(*this))
+{}
 
 Set::Set(const GameP& game)
 	: game(game)
+	, script_manager(new ScriptManager(*this))
 {}
 
 Set::Set(const StyleSheetP& stylesheet)
 	: stylesheet(stylesheet)
 	, game(stylesheet->game)
+	, script_manager(new ScriptManager(*this))
 {}
 
 Set::~Set() {}
 
 
 Context& Set::getContext() {
-	throw "TODO";
+	return script_manager->getContext(stylesheet);
+}
+Context& Set::getContext(const Card& card) {
+	return script_manager->getContext(card.stylesheet ? card.stylesheet : stylesheet);
 }
 
 String Set::typeName() const { return _("set"); }
 
-void Set::validate() {
+// fix values for versions < 0.2.7
+void fix_value_207(const ValueP& value) {
+	if (TextValue* v = dynamic_cast<TextValue*>(value.get())) {
+		// text value -> fix it
+//		v->value.assign(	// don't change defaultness
+//			fix_old_tags(v->value); // remove tags
+//		);
+	}
+}
+
+void Set::validate(Version file_app_version) {
+	// are the
+	if (!game) {
+		throw Error(_("No game specified for the set"));
+	}
+	if (!stylesheet) {
+		// TODO : Allow user to select a different style
+		throw Error(_("No stylesheet specified for the set"));
+	}
+	if (stylesheet->game != game) {
+		throw Error(_("stylesheet and set don't refer to the same game, this is an error in the stylesheet file"));
+	}
+	
+	// This is our chance to fix version incompatabilities
+	if (file_app_version < 207) {
+		// Since 0.2.7 we use </tag> style close tags, in older versions it was </>
+		// Walk over all fields and fix...
+		FOR_EACH(c, cards) {
+			FOR_EACH(v, c->data) fix_value_207(v);
+		}
+		FOR_EACH(v, data) fix_value_207(v);
+/*		FOR_EACH(s, styleData) {
+			FOR_EACH(v, s.second->data) fix_value_207(v);
+		}
+*/	}
 }
 
 IMPLEMENT_REFLECTION(Set) {
diff --git a/src/data/set.hpp b/src/data/set.hpp
index eff9f0eb..2ba8596f 100644
--- a/src/data/set.hpp
+++ b/src/data/set.hpp
@@ -55,9 +55,13 @@ class Set : public Packaged {
 	/** Should only be used from the main thread! */
 	Context& getContext();
 	
+	/// A context for performing scripts on a particular card
+	/** Should only be used from the main thread! */
+	Context& getContext(const Card& card);
+	
   protected:
 	virtual String typeName() const;
-	virtual void validate();
+	virtual void validate(Version);
 	
 	DECLARE_REFLECTION();
   private:
diff --git a/src/data/stylesheet.cpp b/src/data/stylesheet.cpp
index d5c27039..9a95beab 100644
--- a/src/data/stylesheet.cpp
+++ b/src/data/stylesheet.cpp
@@ -11,11 +11,14 @@
 #include <data/field.hpp>
 #include <util/io/package_manager.hpp>
 
+DECLARE_TYPEOF_COLLECTION(StyleSheet*);
+
 // ----------------------------------------------------------------------------- : StyleSheet
 
 StyleSheet::StyleSheet()
 	: card_width(100), card_height(100)
 	, card_dpi(96), card_background(*wxWHITE)
+	, dependencies_initialized(false)
 {}
 
 StyleSheetP StyleSheet::byGameAndName(const Game& game, const String& name) {
@@ -63,6 +66,11 @@ IMPLEMENT_REFLECTION(StyleSheet) {
 //	io(_("extra style"), extraInfoStyle);
 }
 
+void StyleSheet::validate(Version) {
+	// a default for the full name
+	if (full_name.empty()) full_name = name();
+}
+
 
 // special behaviour of reading/writing StyleSheetPs: only read/write the name
 
diff --git a/src/data/stylesheet.hpp b/src/data/stylesheet.hpp
index 3cde9510..a0350018 100644
--- a/src/data/stylesheet.hpp
+++ b/src/data/stylesheet.hpp
@@ -40,18 +40,21 @@ class StyleSheet : public Packaged {
 	/** The indices should correspond to the set_fields in the Game */
 	IndexMap<FieldP, StyleP> set_info_style;
 	
+	bool dependencies_initialized;	///< are the script dependencies comming from this stylesheet all initialized?
+	
+	/// Load a StyleSheet, given a Game and the name of the StyleSheet
+	static StyleSheetP byGameAndName(const Game& game, const String& name);
+	/// name of the package without the game name
+	String styleName();
+		
 	static String typeNameStatic();
 	virtual String typeName() const;
 	virtual String fullName() const;
 	virtual InputStreamP openIconFile();
 	
-	/// Load a StyleSheet, given a Game and the name of the StyleSheet
-	static StyleSheetP byGameAndName(const Game& game, const String& name);
+  protected:
+	virtual void validate(Version);
 	
-	/// name of the package without the game name
-	String styleName();
-	
-  private:
 	DECLARE_REFLECTION();
 };
 
diff --git a/src/gfx/resample_image.cpp b/src/gfx/resample_image.cpp
index 0726110c..e6723067 100644
--- a/src/gfx/resample_image.cpp
+++ b/src/gfx/resample_image.cpp
@@ -30,18 +30,18 @@ void resample_pass(const Image& img_in, Image& img_out, int offset_in, int offse
                    int lines, int line_delta_in, int line_delta_out)
 {
 	bool alpha = img_in.HasAlpha();
-	if (alpha) img_out.InitAlpha();
+	if (alpha && !img_out.HasAlpha()) img_out.InitAlpha();
 	int out_fact = (length_out << shift) / length_in; // how much to output for 256 input = 1 pixel
 	int out_rest = (length_out << shift) % length_in;
 	// for each line
 	for (int l = 0 ; l < lines ; ++l) {
-		Byte* in  = img_in .GetData() + 3 * (offset_in  + line_delta_in);
-		Byte* out = img_out.GetData() + 3 * (offset_out + line_delta_out);
+		Byte* in  = img_in .GetData() + 3 * (offset_in  + l * line_delta_in);
+		Byte* out = img_out.GetData() + 3 * (offset_out + l * line_delta_out);
 		UInt in_rem = out_fact + out_rest; // remaining to input from the current input pixel
 		
 		if (alpha) {
-			Byte* in_a  = img_in .GetAlpha() + (offset_in  + line_delta_in);
-			Byte* out_a = img_out.GetAlpha() + (offset_out + line_delta_out);
+			Byte* in_a  = img_in .GetAlpha() + (offset_in  + l * line_delta_in);
+			Byte* out_a = img_out.GetAlpha() + (offset_out + l * line_delta_out);
 			
 			for (int x = 0 ; x < length_out ; ++x) {
 				UInt out_rem = 1 << shift;
diff --git a/src/mse.vcproj b/src/mse.vcproj
index 9603ddba..e4cda294 100644
--- a/src/mse.vcproj
+++ b/src/mse.vcproj
@@ -1128,6 +1128,9 @@
 			<File
 				RelativePath=".\script\dependency.cpp">
 			</File>
+			<File
+				RelativePath=".\script\dependency.hpp">
+			</File>
 			<File
 				RelativePath=".\script\image.cpp">
 				<FileConfiguration
diff --git a/src/render/value/viewer.cpp b/src/render/value/viewer.cpp
index ac44db89..ca72d42c 100644
--- a/src/render/value/viewer.cpp
+++ b/src/render/value/viewer.cpp
@@ -73,11 +73,12 @@ bool ValueViewer::nativeLook() const {
 		return ValueViewerP(new Type##ValueViewer(parent, static_pointer_cast<Type##Style>(thisP)));	\
 	}
 
-ValueViewerP ChoiceStyle        ::makeViewer(DataViewer& parent, const StyleP& thisP) { return ValueViewerP(); }
+//ValueViewerP ChoiceStyle        ::makeViewer(DataViewer& parent, const StyleP& thisP) { return ValueViewerP(); }
 ValueViewerP BooleanStyle       ::makeViewer(DataViewer& parent, const StyleP& thisP) { return ValueViewerP(); }
 ValueViewerP MultipleChoiceStyle::makeViewer(DataViewer& parent, const StyleP& thisP) { return ValueViewerP(); }
 //ValueViewerP ColorStyle         ::makeViewer(DataViewer& parent, const StyleP& thisP) { return ValueViewerP(); }
 //ValueViewerP ImageStyle         ::makeViewer(DataViewer& parent, const StyleP& thisP) { return ValueViewerP(); }
+IMPLEMENT_MAKE_VIEWER(Choice);
 IMPLEMENT_MAKE_VIEWER(Color);
 IMPLEMENT_MAKE_VIEWER(Image);
 ValueViewerP SymbolStyle        ::makeViewer(DataViewer& parent, const StyleP& thisP) { return ValueViewerP(); }
diff --git a/src/script/dependency.cpp b/src/script/dependency.cpp
index 43295166..e32cfbd3 100644
--- a/src/script/dependency.cpp
+++ b/src/script/dependency.cpp
@@ -13,6 +13,9 @@
 DECLARE_TYPEOF_COLLECTION(ScriptValueP);
 DECLARE_TYPEOF_COLLECTION(Context::Binding);
 
+// NOTE: dependency.cpp has nothing to do with dependency.hpp, the latter defines the dependency
+// type, which is used here as an abstract type. The header for this source file is context.hpp
+
 // ----------------------------------------------------------------------------- : Dummy values
 
 // A dummy type used during dependency analysis,
diff --git a/src/script/dependency.hpp b/src/script/dependency.hpp
new file mode 100644
index 00000000..09de93e6
--- /dev/null
+++ b/src/script/dependency.hpp
@@ -0,0 +1,39 @@
+//+----------------------------------------------------------------------------+
+//| Description:  Magic Set Editor - Program to make Magic (tm) cards          |
+//| Copyright:    (C) 2001 - 2006 Twan van Laarhoven                           |
+//| License:      GNU General Public License 2 or later (see file COPYING)     |
+//+----------------------------------------------------------------------------+
+
+#ifndef HEADER_SCRIPT_DEPENDENCY
+#define HEADER_SCRIPT_DEPENDENCY
+
+// ----------------------------------------------------------------------------- : Includes
+
+#include <util/prec.hpp>
+
+// ----------------------------------------------------------------------------- : Dependency
+
+/// Types of dependencies
+enum DependencyType
+{	DEP_CARD_FIELD			///< dependency of a script in a "card" field
+,	DEP_CARDS_FIELD			///< dependency of a script in a "card"  field for all cards
+,	DEP_SET_FIELD			///< dependency of a script in a "set"   field
+,	DEP_STYLE				///< dependency of a script in a "style" property, data gives the stylesheet
+,	DEP_CARD_COPY_DEP		///< copy the dependencies from a card field
+,	DEP_SET_COPY_DEP		///< copy the dependencies from a set  field
+};
+
+/// A 'pointer' to some script that depends on another script
+class Dependency {
+  public:
+	inline Dependency(DependencyType type, size_t index, void* data = nullptr)
+		: type(type), index(index), data(data)
+	{}
+	
+	DependencyType type   : 5;	///< Type of the dependent script
+	size_t         index  : 27;	///< index into an IndexMap
+	void*          data;		///< Extra pointer data
+};
+
+// ----------------------------------------------------------------------------- : EOF
+#endif
diff --git a/src/script/script_manager.cpp b/src/script/script_manager.cpp
index e26fa436..2b74355f 100644
--- a/src/script/script_manager.cpp
+++ b/src/script/script_manager.cpp
@@ -7,5 +7,98 @@
 // ----------------------------------------------------------------------------- : Includes
 
 #include <script/script_manager.hpp>
+#include <data/set.hpp>
+#include <data/stylesheet.hpp>
+#include <data/game.hpp>
+#include <data/field.hpp>
+#include <util/error.hpp>
 
-// ----------------------------------------------------------------------------- : 
+typedef map<const StyleSheet*,Context*> Contexts;
+typedef IndexMap<FieldP,StyleP> IndexMap_FieldP_StyleP;
+DECLARE_TYPEOF(Contexts);
+DECLARE_TYPEOF_COLLECTION(FieldP);
+DECLARE_TYPEOF_NO_REV(IndexMap_FieldP_StyleP);
+
+// ----------------------------------------------------------------------------- : ScriptManager : initialization
+
+ScriptManager::ScriptManager(Set& set)
+	: set(set)
+{}
+
+ScriptManager::~ScriptManager() {
+	set.actions.removeListener(this);
+	// destroy context
+	FOR_EACH(sc, contexts) {
+		delete sc.second;
+	}
+	// add as an action listener for the set, so we receive actions
+	set.actions.addListener(this);
+}
+
+Context& ScriptManager::getContext(const StyleSheetP& stylesheet) {
+	assert(wxThread::IsMain()); // only use our contexts from the main thread
+	
+	Contexts::iterator it = contexts.find(stylesheet.get());
+	if (it != contexts.end()) {
+		return *it->second; // we already have a context
+	} else {
+		// create a new context
+		Context* ctx = new Context();
+		contexts.insert(make_pair(stylesheet.get(), ctx));
+		// variables
+		//  NOTE: do not use a smart pointer for the pointer to the set, because the set owns this
+		//        which would lead to a reference cycle.
+		ctx->setVariable(_("set"),        new_intrusive1<ScriptObject<Set*> >(&set));
+		ctx->setVariable(_("game"),       toScript(set.game));
+		ctx->setVariable(_("stylesheet"), toScript(stylesheet));
+		//ctx->style->object = style;
+		//ctx->setVariable(_("styling"), toScript(set->extraStyleData(style)));
+		try {
+			// perform init scripts
+			set.game  ->init_script.invoke(*ctx);
+			stylesheet->init_script.invoke(*ctx);
+			// find script dependencies
+			initDependencies(*ctx, *set.game);
+			initDependencies(*ctx, *stylesheet);
+			// apply scripts to everything
+			updateAll();
+		} catch (Error e) {
+			handle_error(e, false, false);
+		}		
+		// initialize dependencies
+		return *ctx;
+	}
+}
+
+void ScriptManager::initDependencies(Context& ctx, Game& game) {
+	if (game.dependencies_initialized) return;
+	game.dependencies_initialized = true;
+	// find dependencies of card fields
+	FOR_EACH(f, game.card_fields) {
+		f->initDependencies(ctx, Dependency(DEP_CARD_FIELD, f->index));
+	}
+	// find dependencies of set fields
+	FOR_EACH(f, game.set_fields) {
+		f->initDependencies(ctx, Dependency(DEP_SET_FIELD, f->index));
+	}
+}
+
+
+void ScriptManager::initDependencies(Context& ctx, StyleSheet& stylesheet) {
+	if (stylesheet.dependencies_initialized) return;
+	stylesheet.dependencies_initialized = true;
+	// find dependencies of choice images and other style stuff
+	FOR_EACH(s, stylesheet.card_style) {
+		s->initDependencies(ctx, Dependency(DEP_STYLE, s->fieldP->index, &stylesheet));
+	}
+}
+
+// ----------------------------------------------------------------------------- : ScriptManager : dependency handling
+
+void ScriptManager::onAction(const Action& action, bool undone) {
+	// TODO
+}
+
+void ScriptManager::updateAll() {
+	// TODO
+}
\ No newline at end of file
diff --git a/src/script/script_manager.hpp b/src/script/script_manager.hpp
index 7be1d2de..1d4d19e2 100644
--- a/src/script/script_manager.hpp
+++ b/src/script/script_manager.hpp
@@ -10,29 +10,15 @@
 // ----------------------------------------------------------------------------- : Includes
 
 #include <util/prec.hpp>
+#include <util/action_stack.hpp>
 #include <script/context.hpp>
-#include <data/set.hpp>
+#include <script/dependency.hpp>
 
-// ----------------------------------------------------------------------------- : Dependency
-
-/// Types of dependencies
-enum DependencyType
-{	DEP_CARD_FIELD			///< dependency of a script in a "card" field
-,	DEP_CARDS_FIELD			///< dependency of a script in a "card"  field for all cards
-,	DEP_SET_INFO_FIELD		///< dependency of a script in a "set"   field
-,	DEP_STYLESHEET_FIELD	///< dependency of a script in a "style" property
-,	DEP_CARD_COPY_DEP		///< copy the dependencies from a card field
-,	DEP_SET_COPY_DEP		///< copy the dependencies from a set  field
-,	DEP_CHOICE_IMAGE		///< dependency of a generated choice image, index2 gives the index of the choice image
-};
-
-/// A 'pointer' to some script that depends on another script
-class Dependency {
-  public:
-	DependencyType type   : 4;	///< Type of the dependent script
-	UInt           index2 : 10;	///< A second index, used for some types
-	size_t         index;		///< index into an IndexMap
-};
+class Set;
+class Value;
+DECLARE_POINTER_TYPE(Game);
+DECLARE_POINTER_TYPE(StyleSheet);
+DECLARE_POINTER_TYPE(Card);
 
 // ----------------------------------------------------------------------------- : Dependencies of data type members
 
@@ -50,14 +36,17 @@ class Dependency {
 class ScriptManager : public ActionListener {
   public:
 	ScriptManager(Set& set);
+	~ScriptManager();
+		
+	/// Get a context to use for the set, for a given stylesheet
+	Context& getContext(const StyleSheetP& s);
 	
   private:
-	Context context; ///< Context for evaluating scripts
+	Set&                            set;		///< Set for which we are managing scripts
+	map<const StyleSheet*,Context*> contexts;	///< Context for evaluating scripts that use a given stylesheet
 	
-	void initScriptStuff();
-	void initDependencies();
-	void initDependencies(const StyleSheetP&);
-	void initContext(const StyleSheetP&);
+	void initDependencies(Context&, Game&);
+	void initDependencies(Context&, StyleSheet&);
 	
 	// Update all styles for a particular card
 	void updateStyles(const CardP& card);
diff --git a/src/script/scriptable.cpp b/src/script/scriptable.cpp
index 74b413dc..050bd7fd 100644
--- a/src/script/scriptable.cpp
+++ b/src/script/scriptable.cpp
@@ -40,6 +40,12 @@ void OptionalScript::parse(Reader& reader) {
 	}
 }
 
+void OptionalScript::initDependencies(Context& ctx, const Dependency& dep) const {
+	if (script) {
+		ctx.dependencies(dep, *script);
+	}
+}
+
 
 // custom reflection, different for each type
 
diff --git a/src/script/scriptable.hpp b/src/script/scriptable.hpp
index 2308cdba..a9d0367d 100644
--- a/src/script/scriptable.hpp
+++ b/src/script/scriptable.hpp
@@ -55,7 +55,10 @@ class OptionalScript {
 		}
 		return false;
 	}
-		
+	
+	/// Initialize things this script depends on by adding dep to their list of dependent scripts
+	void initDependencies(Context&, const Dependency& dep) const;
+	
   private:
 	ScriptP script;		///< The script, may be null if there is no script
 	String unparsed;	///< Unparsed script, for writing back to a file
@@ -83,6 +86,10 @@ class Scriptable {
 		return script.invokeOn(ctx, value);
 	}
 	
+	inline void initDependencies(Context& ctx, const Dependency& dep) const {
+		script.initDependencies(ctx, dep);
+	}
+	
   private:
 	T value;				///< The actual value
 	OptionalScript script;	///< The optional script
diff --git a/src/script/value.hpp b/src/script/value.hpp
index 92f031cc..ba92d0c9 100644
--- a/src/script/value.hpp
+++ b/src/script/value.hpp
@@ -214,7 +214,7 @@ class ScriptMap : public ScriptValue {
 template <typename T>
 class ScriptObject : public ScriptValue {
   public:
-	inline ScriptObject(const shared_ptr<T>& v) : value(v) {}
+	inline ScriptObject(const T& v) : value(v) {}
 	virtual ScriptType type() const { return SCRIPT_OBJECT; }
 	virtual String typeName() const { return _("object"); }
 	virtual ScriptValueP getMember(const String& name) const {
@@ -224,7 +224,7 @@ class ScriptObject : public ScriptValue {
 		else             throw  ScriptError(_("Object has no member '") + name + _("'"));
 	}
   private:
-	shared_ptr<T> value; ///< The object
+	T value; ///< The object
 };
 
 // ----------------------------------------------------------------------------- : Creating
@@ -242,7 +242,7 @@ inline ScriptValueP toScript(const map<K,V>*      v) { return new_intrusive1<Scr
 template <typename K, typename V>
 inline ScriptValueP toScript(const IndexMap<K,V>* v) { return new_intrusive1<ScriptMap<IndexMap<K,V> > >(v); }
 template <typename T>
-inline ScriptValueP toScript(const shared_ptr<T>& v) { return new_intrusive1<ScriptObject<T> >(v); }
+inline ScriptValueP toScript(const shared_ptr<T>& v) { return new_intrusive1<ScriptObject<shared_ptr<T> > >(v); }
 
 
 // ----------------------------------------------------------------------------- : Buildin functions
diff --git a/src/util/io/package.cpp b/src/util/io/package.cpp
index 169fd32a..498423da 100644
--- a/src/util/io/package.cpp
+++ b/src/util/io/package.cpp
@@ -388,6 +388,7 @@ void Packaged::open(const String& package) {
 	try {
 		reader.handleAppVersion();
 		reader.handle(*this);
+		validate(reader.file_app_version);
 	} catch (const ParseError& err) {
 		throw FileParseError(err.what(), absoluteFilename() + _("/") + typeName()); // more detailed message
 	}
diff --git a/src/util/io/package.hpp b/src/util/io/package.hpp
index fdf5b35f..99121dc9 100644
--- a/src/util/io/package.hpp
+++ b/src/util/io/package.hpp
@@ -179,7 +179,7 @@ class Packaged : public Package {
 	/// filename of the data file, and extension of the package file
 	virtual String typeName() const = 0;
 	/// Can be overloaded to do validation after loading
-	virtual void validate() {}
+	virtual void validate(Version file_app_version) {}
 	
 	DECLARE_REFLECTION_VIRTUAL();
 };
diff --git a/src/util/io/reader.cpp b/src/util/io/reader.cpp
index 667b2d1f..c2644ea4 100644
--- a/src/util/io/reader.cpp
+++ b/src/util/io/reader.cpp
@@ -31,18 +31,18 @@ Reader::Reader(const String& filename)
 }
 
 void Reader::addAlias(Version end_version, const Char* a, const Char* b) {
-	if (app_version < end_version) {
+	if (file_app_version < end_version) {
 		aliasses[a] = b;
 	}
 }
 
 void Reader::handleAppVersion() {
 	if (enterBlock(_("mse_version"))) {
-		handle(app_version);
-		if (::app_version < app_version) {
+		handle(file_app_version);
+		if (app_version < file_app_version) {
 			wxMessageBox(
 				filename + _("\n")
-				_("This file is made with a newer version of Magic Set Editor (")+ app_version.toString() +_(").\n")
+				_("This file is made with a newer version of Magic Set Editor (")+ file_app_version.toString() +_(").\n")
 				_("When you open it, some aspects of the file may be lost.\n")
 				_("It is recommended that you upgrade to the latest version.\n")
 				_("Visit http:://magicseteditor.sourceforge.net/"), _("Warning"), wxOK | wxICON_EXCLAMATION);
diff --git a/src/util/io/reader.hpp b/src/util/io/reader.hpp
index 5c87b30b..145ea3ae 100644
--- a/src/util/io/reader.hpp
+++ b/src/util/io/reader.hpp
@@ -48,7 +48,7 @@ class Reader {
 	inline bool reading() const { return true; }
 	/// Is the thing currently being read 'complex', i.e. does it have children
 	inline bool isComplex() const { return value.empty(); }
-	/// Add a as an alias for b, all keys a will be replaced with b, only if app_version < end_version
+	/// Add a as an alias for b, all keys a will be replaced with b, only if file_app_version < end_version
 	void addAlias(Version end_version, const Char* a, const Char* b);
 	
 	/// Read and check the application version
@@ -90,7 +90,7 @@ class Reader {
 	
 	// --------------------------------------------------- : Data
 	/// App version this file was made with
-	Version app_version;
+	Version file_app_version;
   private:
 	/// The line we read
 	String line;