Created
September 14, 2016 23:52
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| /** | |
| * Getter and setter functions for our classes to V8 | |
| */ | |
| typedef v8::Local<v8::Value> (*ScriptGlobalGetterFunc)(v8::Isolate*); | |
| /** | |
| * A storage for getter and setter to variable pairs | |
| */ | |
| class ScriptGlobalCallbackPair { | |
| public: | |
| ScriptGlobalCallbackPair() : variableName(0), getter(0), next(0) { } | |
| ~ScriptGlobalCallbackPair() { } | |
| public: | |
| char* variableName; | |
| ScriptGlobalGetterFunc getter; | |
| ScriptGlobalCallbackPair* next; | |
| }; | |
| /** | |
| * A scripted type that can be accessed and created in JS | |
| */ | |
| template<class T> | |
| class ScriptGlobal : public ScriptObject { | |
| public: | |
| ScriptGlobal() { } | |
| ~ScriptGlobal() { } | |
| static void StartTemplate(v8::Isolate* isolate) { | |
| // Start template | |
| v8::Local<v8::ObjectTemplate> tpl = v8::ObjectTemplate::New(isolate); | |
| m_objectTemplate.Reset(isolate, tpl); | |
| m_isolate = isolate; | |
| } | |
| static void SetGlobalName(char* name) { | |
| m_typeName = (char*)malloc(strlen(name) + 1); | |
| strcpy(m_typeName, name); | |
| } | |
| static void AddVariable(char* name, ScriptGlobalGetterFunc getter) { | |
| // Create a new variable function callback | |
| ScriptGlobalCallbackPair* pair = new ScriptGlobalCallbackPair(); | |
| // Copy params | |
| pair->variableName = (char*)malloc(strlen(name) + 1); | |
| strcpy(pair->variableName, name); | |
| pair->getter = getter; | |
| // Set this up as an accessible variable name | |
| v8::Local<v8::ObjectTemplate> tpl = m_objectTemplate.Get(m_isolate); | |
| tpl->SetAccessor(v8::String::NewFromUtf8(m_isolate, name), Getter); | |
| if(m_varList == 0) { | |
| m_varList = pair; | |
| return; | |
| } | |
| ScriptGlobalCallbackPair* current = m_varList; | |
| while(current->next) { | |
| current = current->next; | |
| } | |
| current->next = pair; | |
| } | |
| static void EndTemplate(v8::Local<v8::Context> context) { | |
| // Inject this type name into V8 | |
| v8::Local<v8::ObjectTemplate> tpl = m_objectTemplate.Get(m_isolate); | |
| context->Global()->Set(v8::String::NewFromUtf8(m_isolate, m_typeName), tpl->NewInstance()); | |
| } | |
| static void AddFunction(char* name, v8::FunctionCallback func) { | |
| v8::Local<v8::ObjectTemplate> tpl = m_objectTemplate.Get(m_isolate); | |
| tpl->Set(v8::String::NewFromUtf8(m_isolate, name), v8::FunctionTemplate::New(m_isolate, func)); | |
| } | |
| static void Getter(v8::Local<v8::String> property, const v8::PropertyCallbackInfo<v8::Value>& info) { | |
| // Iterate through the callback list, looking for a registered callback function | |
| ScriptGlobalCallbackPair* current = m_varList; | |
| while(current) { | |
| v8::String::Utf8Value propName(property); | |
| if(strcmp(current->variableName, *propName) == 0) { | |
| if(current->getter != 0) { | |
| v8::Local<v8::Value> val = current->getter(m_isolate); | |
| info.GetReturnValue().Set(val); | |
| return; | |
| } | |
| } | |
| } | |
| } | |
| protected: | |
| // The function template | |
| static v8::Persistent<v8::ObjectTemplate> m_objectTemplate; | |
| // The name of this type inside the JS context | |
| static char* m_typeName; | |
| // The current isolate | |
| static v8::Isolate* m_isolate; | |
| // Linked list of getter/setter combinations for vars | |
| static ScriptGlobalCallbackPair* m_varList; | |
| }; | |
| template<class T> v8::Persistent<v8::ObjectTemplate> ScriptGlobal<T>::m_objectTemplate; | |
| template<class T> char* ScriptGlobal<T>::m_typeName = 0; | |
| template<class T> v8::Isolate* ScriptGlobal<T>::m_isolate = 0; | |
| template<class T> ScriptGlobalCallbackPair* ScriptGlobal<T>::m_varList = 0; |
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