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CustomClass.hx
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355 lines (294 loc) · 9.73 KB
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package hscript;
import hscript.utils.UnsafeReflect;
import haxe.Constraints.Function;
using Lambda;
/**
* The Custom Class core.
*
* Provides handlers for custom classes.
*
* @author Jamextreme140
*/
@:access(hscript.CustomClassHandler)
@:access(hscript.Property)
class CustomClass implements IHScriptCustomClassBehaviour {
public var className(get, never):String;
private function get_className():String
return __class.name;
public var __interp:Interp;
public var __real_fields:Array<String> = []; // UNUSED
public var __class__fields:Array<String> = []; // Declared fields
public var __allowSetGet:Bool = true;
var __class:CustomClassHandler;
var __superClass:IHScriptCustomClassBehaviour;
var __upperClass:IHScriptCustomClassBehaviour;
var __constructor:Function;
var __overrideFields:Array<String> = [];
var __cachedFieldSet:Map<String, Dynamic> = null;
var initializing:Bool = false;
public function new(__class:CustomClassHandler, ?args:Array<Dynamic>, ?cachedFieldSet:Map<String, Dynamic>) {
this.__class = __class;
__interp = new Interp();
__interp.errorHandler = __class.__interp.errorHandler;
__interp.importFailedCallback = __class.__interp.importFailedCallback;
// __interp.variables = __class.staticInterp.variables;
@:privateAccess __interp.usingHandler.usingEntries = __class.ogInterp.usingHandler.usingEntries;
__interp.publicVariables = __class.ogInterp.publicVariables;
__interp.staticVariables = __class.ogInterp.staticVariables;
__interp.customClasses = __class.ogInterp.customClasses;
for(f => v in __class.__interp.variables) {
if(f == 'new') continue;
if (!__interp.variables.exists(f))
__interp.variables.set(f, v);
}
for (f in __class.fields) {
switch (Tools.expr(f)) {
case EVar(n): __class__fields.push(n);
case EFunction(_, _, n, _, _, _, isOverride):
if(isOverride) __overrideFields.push(n);
__class__fields.push(n);
default: continue;
}
@:privateAccess __interp.exprReturn(f);
}
__interp.scriptObject = this;
initializing = true;
if(cachedFieldSet != null)
for(f => v in cachedFieldSet)
this.hset(f, v);
if (hasField('new')) {
buildConstructor();
call('new', args);
if(__cachedFieldSet != null) {
__cachedFieldSet.clear();
__cachedFieldSet = null;
}
if (this.__superClass == null && __class.extend != null)
__interp.error(ECustom("super() not called"));
} else if (__class.extend != null) {
buildSuperClass(args);
}
initializing = false;
}
function cacheFieldSet(name:String, val:Dynamic) {
if(!initializing) return;
if(__cachedFieldSet == null) __cachedFieldSet = [];
__cachedFieldSet.set(name, val);
}
function buildConstructor() {
__constructor = Reflect.makeVarArgs(buildSuperClass);
}
function buildSuperClass(?args:Array<Dynamic>) {
if (args == null)
args = [];
if (__class.cl == null) {
__interp.error(ECustom('Current class does not have a super'));
return;
}
if (__class.cl is CustomClassHandler) {
var customClass = new CustomClass(__class.cl, args, __cachedFieldSet);
if(__overrideFields.length > 0) {
for (field in __overrideFields) {
var func = __interp.variables.get(field);
customClass.overrideField(field, func);
}
}
customClass.__upperClass = this;
__superClass = customClass;
@:privateAccess __interp.__instanceFields = __interp.__instanceFields.concat(getSuperFields());
} else {
if(__cachedFieldSet != null)
UnsafeReflect.setField(__class.cl, "__cachedFieldSet", __cachedFieldSet);
__superClass = Type.createInstance(__class.cl, args);
var disallowCopy:Array<String> = {
var fieldMap:Map<String, String> = []; // Prevent duplicate values
for(f in Reflect.fields(__superClass).concat(Type.getInstanceFields(Type.getClass(__superClass))))
fieldMap.set(f, f);
fieldMap.array();
}
this.__real_fields = disallowCopy;
@:privateAccess __interp.__instanceFields = __interp.__instanceFields.concat(disallowCopy);
__superClass.__real_fields = this.__real_fields;
__superClass.__class__fields = this.__class__fields;
__superClass.__interp = this.__interp;
}
}
public function call(name:String, ?args:Array<Dynamic>, ?toSuper:Bool = false):Dynamic {
var superFnName:Null<String> = toSuper ? '_HX_SUPER__$name' : null;
var fn:Dynamic = {
if(toSuper && __interp.variables.exists(superFnName)) {
__interp.variables.get(superFnName);
}
else
__interp.variables.get(name);
};
if (fn != null && Reflect.isFunction(fn))
return UnsafeReflect.callMethodUnsafe(null, fn, (args == null) ? [] : args);
else
__interp.error(ECustom('$name doesn\'t exists or is not a function'));
return null;
}
function hasField(name:String) {
return __class__fields.contains(name);
}
function hasStaticField(name:String):Bool {
return __class.hasField(name);
}
function getField(name:String, allowProperty:Bool = true):Dynamic {
var f = __interp.variables.get(name);
if (f != null && allowProperty && f is Property) {
var prop:Property = cast f;
prop.__allowSetGet = this.__allowSetGet;
var r = prop.callGetter(name);
prop.__allowSetGet = null;
return r;
}
return f;
}
function setField(name:String, val:Dynamic):Dynamic {
var f = getField(name, false);
if (f != null && f is Property) {
var prop:Property = cast f;
prop.__allowSetGet = this.__allowSetGet;
var r = prop.callSetter(name, val);
prop.__allowSetGet = null;
return r;
}
__interp.variables.set(name, val);
return val;
}
/**
* Overrides (replaces) the declared function.
* @param name
* @param func
*/
function overrideField(name:String, func:Function) {
var f = getField(name, false);
if(f != null && Reflect.isFunction(f)) {
__interp.variables.set(name, func);
__interp.variables.set('_HX_SUPER__$name', f);
}
else if(__superClass != null && __superClass is CustomClass) {
cast(__superClass, CustomClass).overrideField(name, func);
}
}
function superHasField(name:String) {
if (__superClass == null)
return false;
var realFieldExists = __superClass.__real_fields != null && __superClass.__real_fields.contains(name);
var classFieldExists = __superClass.__class__fields != null && __superClass.__class__fields.contains(name);
if(!realFieldExists && !classFieldExists && __superClass is CustomClass)
return cast(__superClass, CustomClass).superHasField(name);
return realFieldExists || classFieldExists;
}
function getSuperFields():Array<String> {
if(__superClass == null) return [];
var classFields:Map<String, String> = []; // Prevents duplicated values
var cls:Null<IHScriptCustomClassBehaviour> = __superClass;
while (cls != null) {
for(fieldSet in [cls.__class__fields, cls.__real_fields])
for(f in fieldSet)
classFields.set(f, f);
var next:IHScriptCustomClassBehaviour = null;
if(cls is CustomClass)
next = cast(cls, CustomClass).__superClass;
if (next == null)
break;
cls = next;
}
return [for(f in classFields) f];
}
public function hget(name:String):Dynamic {
switch (name) {
case 'superClass': return __superClass;
case 'superConstructor': return __constructor;
default:
if (hasField(name))
return getField(name);
if (hasStaticField(name)) {
__interp.error(ECustom('The field ${name} should be accessed in a static way.'));
return null;
}
if (__superClass != null) {
if (superHasField(name)) {
__superClass.__allowSetGet = this.__allowSetGet;
return __superClass.hget(name);
}
}
throw "field '"
+ name
+ "' does not exist in custom class '"
+ this.className
+ "'"
+ (__superClass != null ? "' or super class '" + Type.getClassName(Type.getClass(this.__superClass)) + "'" : "");
}
return null;
}
public function hset(name:String, val:Dynamic):Dynamic {
if (hasField(name))
return setField(name, val);
if (hasStaticField(name)) {
__interp.error(ECustom('The field ${name} should be accessed in a static way.'));
return null;
}
if (__superClass != null) {
if (superHasField(name)) {
__superClass.__allowSetGet = this.__allowSetGet;
return __superClass.hset(name, val);
}
}
else if(__class.extend != null && initializing) {
cacheFieldSet(name, val);
return val;
}
throw "field '"
+ name
+ "' does not exist in custom class '"
+ this.className
+ "'"
+ (__superClass != null ? "' or super class '" + Type.getClassName(Type.getClass(this.__superClass)) + "'" : "");
return null;
}
// UNUSED
public function __callGetter(name:String):Dynamic {
return null;
}
public function __callSetter(name:String, val:Dynamic):Dynamic {
return null;
}
/**
* Returns the real superClass if the Custom Class
* extends another Custom Class, and so on until
* it reaches a real class, otherwise it will
* return the last fetched Custom Class
* @return Null<Dynamic>
*/
public function getSuperclass():IHScriptCustomClassBehaviour {
if(__superClass == null) return null;
var cls:Null<IHScriptCustomClassBehaviour> = __superClass;
// Check if the superClass is another custom class,
// so it will find for a real class, otherwise
// returns the last super CustomClass parent.
while (cls != null && cls is CustomClass) {
var next = cast(cls, CustomClass).__superClass;
if (next == null)
break; // Return the Custom Class itself
cls = next;
}
return cls is CustomClass ? this : cls;
}
// TODO: scripted safe cast for custom classes
public function getUpperclass():IHScriptCustomClassBehaviour {
if(__upperClass == null) return this;
var cls:CustomClass = cast __upperClass;
while (cls != null) {
var prev:CustomClass = cast cls.__upperClass;
if(prev == null)
break;
cls = prev;
}
return cls;
}
public function toString():String
return className;
}