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Enable converting ScopedPersistent.

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This commit is contained in:
Cheng Zhao 2014-07-21 13:07:56 +08:00
parent 14c851e9f8
commit 3d713baa4c
1 changed files with 51 additions and 17 deletions
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66
native_mate/scoped_persistent.h
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@ -6,6 +6,7 @@
#define NATIVE_MATE_SCOPED_PERSISTENT_H_
#include "base/memory/ref_counted.h"
#include "native_mate/converter.h"
#include "v8/include/v8.h"
namespace mate {
@ -15,10 +16,11 @@ namespace mate {
template <typename T>
class ScopedPersistent {
public:
ScopedPersistent() {
ScopedPersistent(v8::Isolate* isolate = NULL) : isolate_(isolate) {
}
explicit ScopedPersistent(v8::Handle<v8::Value> handle) {
ScopedPersistent(v8::Handle<v8::Value> handle, v8::Isolate* isolate = NULL)
: isolate_(isolate) {
reset(v8::Handle<T>::Cast(handle));
}
@ -27,11 +29,17 @@ class ScopedPersistent {
}
void reset(v8::Handle<T> handle) {
if (!handle.IsEmpty())
handle_.Reset(GetIsolate(handle), handle);
else
reset(GetIsolate(handle), handle);
}
void reset(v8::Isolate* isolate, v8::Handle<T> handle) {
if (!handle.IsEmpty()) {
isolate_ = isolate;
handle_.Reset(isolate, handle);
} else {
reset();
}
}
void reset() {
handle_.Reset();
@ -42,9 +50,7 @@ class ScopedPersistent {
}
v8::Handle<T> NewHandle() const {
if (handle_.IsEmpty())
return v8::Local<T>();
return v8::Local<T>::New(GetIsolate(handle_), handle_);
return NewHandle(GetIsolate(handle_));
}
v8::Handle<T> NewHandle(v8::Isolate* isolate) const {
@ -59,29 +65,38 @@ class ScopedPersistent {
handle_.SetWeak(parameter, callback);
}
v8::Isolate* isolate() const { return isolate_; }
private:
template <typename U>
static v8::Isolate* GetIsolate(v8::Handle<U> object_handle) {
v8::Isolate* GetIsolate(v8::Handle<U> object_handle) const {
// Only works for v8::Object and its subclasses. Add specialisations for
// anything else.
if (!object_handle.IsEmpty())
return GetIsolate(object_handle->CreationContext());
return v8::Isolate::GetCurrent();
return GetIsolate();
}
static v8::Isolate* GetIsolate(v8::Handle<v8::Context> context_handle) {
v8::Isolate* GetIsolate(v8::Handle<v8::Context> context_handle) const {
if (!context_handle.IsEmpty())
return context_handle->GetIsolate();
return v8::Isolate::GetCurrent();
return GetIsolate();
}
static v8::Isolate* GetIsolate(
v8::Handle<v8::ObjectTemplate> template_handle) {
return v8::Isolate::GetCurrent();
v8::Isolate* GetIsolate(
v8::Handle<v8::ObjectTemplate> template_handle) const {
return GetIsolate();
}
template <typename U>
static v8::Isolate* GetIsolate(const U& any_handle) {
v8::Isolate* GetIsolate(const U& any_handle) const {
return GetIsolate();
}
v8::Isolate* GetIsolate() const {
if (isolate_)
return isolate_;
else
return v8::Isolate::GetCurrent();
}
v8::Isolate* isolate_;
v8::Persistent<T> handle_;
DISALLOW_COPY_AND_ASSIGN(ScopedPersistent);
@ -106,6 +121,25 @@ class RefCountedPersistent : public ScopedPersistent<T>,
DISALLOW_COPY_AND_ASSIGN(RefCountedPersistent);
};
template<typename T>
struct Converter<ScopedPersistent<T> > {
static v8::Handle<v8::Value> ToV8(v8::Isolate* isolate,
const ScopedPersistent<T>& val) {
return val.NewHandle(isolate);
}
static bool FromV8(v8::Isolate* isolate,
v8::Handle<v8::Value> val,
ScopedPersistent<T>* out) {
v8::Handle<T> converted;
if (!Converter<v8::Handle<T> >::FromV8(isolate, val, &converted))
return false;
out->reset(isolate, converted);
return true;
}
};
} // namespace mate
#endif // NATIVE_MATE_SCOPED_PERSISTENT_H_