mirror of
https://github.com/amyinspace/MagicSetEditor2.git
synced 2026-06-10 04:57:00 -04:00
coppro
26562e03e3
git-svn-id: svn://svn.code.sf.net/p/magicseteditor/code/trunk@837 0fc631ac-6414-0410-93d0-97cfa31319b6
289 lines
12 KiB
C++
289 lines
12 KiB
C++
//+----------------------------------------------------------------------------+
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//| Description: Magic Set Editor - Program to make Magic (tm) cards |
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//| Copyright: (C) 2001 - 2008 Twan van Laarhoven and "coppro" |
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//| License: GNU General Public License 2 or later (see file COPYING) |
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//+----------------------------------------------------------------------------+
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#ifndef HEADER_SCRIPT_TO_VALUE
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#define HEADER_SCRIPT_TO_VALUE
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// ----------------------------------------------------------------------------- : Includes
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#include <script/value.hpp>
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#include <util/reflect.hpp>
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#include <util/error.hpp>
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#include <util/io/get_member.hpp>
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// ----------------------------------------------------------------------------- : Overloadable templates
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/// Number of items in some collection like object, can be overloaded
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template <typename T>
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int item_count(const T& v) {
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return -1;
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}
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/// Return an iterator for some collection, can be overloaded
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template <typename T>
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ScriptValueP make_iterator(const T& v) {
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return ScriptValueP();
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}
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/// Mark a dependency on a member of value, can be overloaded
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template <typename T>
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void mark_dependency_member(const T& value, const String& name, const Dependency& dep) {}
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/// Type name of an object, for error messages
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template <typename T> inline String type_name(const T&) {
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return _TYPE_("object");
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}
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template <typename K, typename V> inline String type_name(const pair<K,V>& p) {
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return type_name(p.second); // for maps
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}
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// ----------------------------------------------------------------------------- : Errors
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/// A delayed error message.
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/** Only when trying to use the object will the error be thrown.
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* This can be 'caught' by the "or else" construct
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*/
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class ScriptDelayedError : public ScriptValue {
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public:
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inline ScriptDelayedError(const ScriptError& error) : error(error) {}
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virtual ScriptType type() const;// { return SCRIPT_ERROR; }
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// all of these throw
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virtual String typeName() const;
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virtual operator String() const;
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virtual operator double() const;
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virtual operator int() const;
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virtual operator Color() const;
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virtual int itemCount() const;
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virtual const void* comparePointer() const;
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// these can propagate the error
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virtual ScriptValueP getMember(const String& name) const;
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virtual ScriptValueP dependencyMember(const String& name, const Dependency&) const;
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virtual ScriptValueP eval(Context&) const;
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virtual ScriptValueP dependencies(Context&, const Dependency&) const;
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virtual ScriptValueP makeIterator(const ScriptValueP& thisP) const;
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private:
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ScriptError error; // the error message
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};
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inline ScriptValueP delayError(const String& m) {
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return new_intrusive1<ScriptDelayedError>(ScriptError(m));
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}
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// ----------------------------------------------------------------------------- : Iterators
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// Iterator over a collection
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struct ScriptIterator : public ScriptValue {
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virtual ScriptType type() const;// { return SCRIPT_ITERATOR; }
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virtual String typeName() const;// { return "iterator"; }
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/// Return the next item for this iterator, or ScriptValueP() if there is no such item
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virtual ScriptValueP next() = 0;
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};
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// make an iterator over a range
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ScriptValueP rangeIterator(int start, int end);
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// ----------------------------------------------------------------------------- : Collections
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// Iterator over a collection
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template <typename Collection>
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class ScriptCollectionIterator : public ScriptIterator {
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public:
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ScriptCollectionIterator(const Collection* col) : pos(0), col(col) {}
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virtual ScriptValueP next() {
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if (pos < col->size()) {
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return to_script(col->at(pos++));
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} else {
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return ScriptValueP();
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}
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}
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private:
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size_t pos;
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const Collection* col;
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};
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/// Script value containing a collection
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template <typename Collection>
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class ScriptCollection : public ScriptValue {
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public:
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inline ScriptCollection(const Collection* v) : value(v) {}
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virtual ScriptType type() const { return SCRIPT_COLLECTION; }
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virtual String typeName() const { return _TYPE_1_("collection of", type_name(*value->begin())); }
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virtual ScriptValueP getMember(const String& name) const {
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long index;
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if (name.ToLong(&index) && index >= 0 && (size_t)index < value->size()) {
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return to_script(value->at(index));
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} else {
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return ScriptValue::getMember(name);
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}
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}
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virtual ScriptValueP makeIterator(const ScriptValueP& thisP) const {
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return new_intrusive1<ScriptCollectionIterator<Collection> >(value);
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}
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virtual int itemCount() const { return (int)value->size(); }
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/// Collections can be compared by comparing pointers
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virtual const void* comparePointer() const { return value; }
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private:
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/// Store a pointer to a collection, collections are only ever used for structures owned outside the script
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const Collection* value;
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};
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// ----------------------------------------------------------------------------- : Collections : maps
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template <typename V>
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ScriptValueP get_member(const map<String,V>& m, const String& name) {
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typename map<String,V>::const_iterator it = m.find(name);
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if (it != m.end()) {
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return to_script(it->second);
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} else {
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return delayError(_ERROR_2_("has no member", _TYPE_("collection"), name));
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}
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}
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template <typename K, typename V>
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ScriptValueP get_member(const IndexMap<K,V>& m, const String& name) {
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typename IndexMap<K,V>::const_iterator it = m.find(name);
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if (it != m.end()) {
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return to_script(*it);
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} else {
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return delayError(_ERROR_2_("has no member", _TYPE_("collection"), name));
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}
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}
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/// Script value containing a map-like collection
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template <typename Collection>
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class ScriptMap : public ScriptValue {
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public:
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inline ScriptMap(const Collection* v) : value(v) {}
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virtual ScriptType type() const { return SCRIPT_COLLECTION; }
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virtual String typeName() const { return _TYPE_1_("collection of", type_name(value->begin())); }
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virtual ScriptValueP getMember(const String& name) const {
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return get_member(*value, name);
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}
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virtual int itemCount() const { return (int)value->size(); }
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/// Collections can be compared by comparing pointers
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virtual const void* comparePointer() const { return value; }
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virtual ScriptValueP dependencyMember(const String& name, const Dependency& dep) const {
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mark_dependency_member(*value, name, dep);
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return getMember(name);
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}
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private:
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/// Store a pointer to a collection, collections are only ever used for structures owned outside the script
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const Collection* value;
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};
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// ----------------------------------------------------------------------------- : Collections : from script
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/// Script value containing a custom collection, returned from script functions
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class ScriptCustomCollection : public ScriptValue {
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public:
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virtual ScriptType type() const { return SCRIPT_COLLECTION; }
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virtual String typeName() const { return _TYPE_("collection"); }
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virtual ScriptValueP getMember(const String& name) const;
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virtual ScriptValueP makeIterator(const ScriptValueP& thisP) const;
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virtual int itemCount() const { return (int)value.size(); }
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/// Collections can be compared by comparing pointers
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virtual const void* comparePointer() const { return &value; }
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/// The collection as a list (contains all values)
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vector<ScriptValueP> value;
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/// The collection as a map (contains only the values that have a key)
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map<String,ScriptValueP> key_value;
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};
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// ----------------------------------------------------------------------------- : Objects
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/// Script value containing an object (pointer)
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template <typename T>
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class ScriptObject : public ScriptValue {
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public:
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inline ScriptObject(const T& v) : value(v) {}
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virtual ScriptType type() const { return SCRIPT_OBJECT; }
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virtual String typeName() const { return type_name(*value); }
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virtual operator String() const { ScriptValueP d = getDefault(); return d ? *d : ScriptValue::operator String(); }
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virtual operator double() const { ScriptValueP d = getDefault(); return d ? *d : ScriptValue::operator double(); }
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virtual operator int() const { ScriptValueP d = getDefault(); return d ? *d : ScriptValue::operator int(); }
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virtual operator Color() const { ScriptValueP d = getDefault(); return d ? *d : ScriptValue::operator Color(); }
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virtual ScriptValueP getMember(const String& name) const {
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GetMember gm(name);
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gm.handle(*value);
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if (gm.result()) return gm.result();
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else {
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// try nameless member
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ScriptValueP d = getDefault();
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if (d) {
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return d->getMember(name);
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} else {
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return ScriptValue::getMember(name);
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}
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}
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}
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virtual ScriptValueP dependencyMember(const String& name, const Dependency& dep) const {
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mark_dependency_member(*value, name, dep);
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return getMember(name);
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}
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virtual ScriptValueP makeIterator(const ScriptValueP& thisP) const {
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ScriptValueP it = make_iterator(*value);
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return it ? it : ScriptValue::makeIterator(thisP);
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}
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virtual int itemCount() const {
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int i = item_count(*value);
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return i >= 0 ? i : ScriptValue::itemCount();
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}
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/// Objects can be compared by comparing pointers
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virtual const void* comparePointer() const { return &*value; }
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/// Get access to the value
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inline T getValue() const { return value; }
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private:
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T value; ///< The object
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ScriptValueP getDefault() const {
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GetDefaultMember gdm;
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gdm.handle(*value);
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return gdm.result();
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}
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};
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// ----------------------------------------------------------------------------- : Creating
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/// Convert a value to a script value
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ScriptValueP to_script(int v);
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inline ScriptValueP to_script(long v) { return to_script((int) v); }
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ScriptValueP to_script(double v);
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ScriptValueP to_script(const String& v);
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ScriptValueP to_script(const Color& v);
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inline ScriptValueP to_script(bool v) { return v ? script_true : script_false; }
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template <typename T>
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inline ScriptValueP to_script(const vector<T>* v) { return new_intrusive1<ScriptCollection<vector<T> > >(v); }
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template <typename K, typename V>
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inline ScriptValueP to_script(const map<K,V>* v) { return new_intrusive1<ScriptMap<map<K,V> > >(v); }
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template <typename K, typename V>
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inline ScriptValueP to_script(const IndexMap<K,V>* v) { return new_intrusive1<ScriptMap<IndexMap<K,V> > >(v); }
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template <typename T>
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inline ScriptValueP to_script(const intrusive_ptr<T>& v) { return new_intrusive1<ScriptObject<intrusive_ptr<T> > >(v); }
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template <typename T>
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inline ScriptValueP to_script(const Defaultable<T>& v) { return to_script(v()); }
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// ----------------------------------------------------------------------------- : Destructing
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/// Convert a value from a script value to a normal value
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template <typename T> inline T from_script (const ScriptValueP& value) {
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ScriptObject<T>* o = dynamic_cast<ScriptObject<T>*>(value.get());
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if (!o) {
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throw ScriptError(_ERROR_2_("can't convert", value->typeName(), _TYPE_("object" )));
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}
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return o->getValue();
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}
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template <> inline ScriptValueP from_script<ScriptValueP>(const ScriptValueP& value) { return value; }
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template <> inline String from_script<String> (const ScriptValueP& value) { return *value; }
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template <> inline int from_script<int> (const ScriptValueP& value) { return *value; }
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template <> inline double from_script<double> (const ScriptValueP& value) { return *value; }
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template <> inline bool from_script<bool> (const ScriptValueP& value) { return *value; }
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template <> inline Color from_script<Color> (const ScriptValueP& value) { return *value; }
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// ----------------------------------------------------------------------------- : EOF
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#endif
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