285 lines
8.1 KiB
C++
285 lines
8.1 KiB
C++
// Copyright (c) 2013 GitHub, Inc. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#ifndef COMMON_V8_CONVERSIONS_H_
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#define COMMON_V8_CONVERSIONS_H_
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#include <map>
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#include <string>
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#include <vector>
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#include "base/files/file_path.h"
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#include "base/string16.h"
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#include "browser/api/atom_api_window.h"
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#include "googleurl/src/gurl.h"
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#include "ui/gfx/rect.h"
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#include "v8/include/v8.h"
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// Convert V8 value to arbitrary supported types.
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struct FromV8Value {
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explicit FromV8Value(v8::Handle<v8::Value> value) : value_(value) {}
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operator int() {
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return value_->IntegerValue();
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}
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operator bool() {
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return value_->BooleanValue();
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}
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operator std::string() {
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return *v8::String::Utf8Value(value_);
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}
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operator string16() {
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v8::String::Value s(value_);
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return string16(reinterpret_cast<const char16*>(*s), s.length());
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}
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operator GURL() {
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std::string str = FromV8Value(value_);
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return GURL(str);
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}
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operator base::FilePath() {
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return base::FilePath::FromUTF8Unsafe(FromV8Value(value_));
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}
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operator gfx::Rect() {
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v8::Handle<v8::Object> rect = value_->ToObject();
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v8::Handle<v8::Value> x = rect->Get(v8::String::New("x"));
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v8::Handle<v8::Value> y = rect->Get(v8::String::New("y"));
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v8::Handle<v8::Value> width = rect->Get(v8::String::New("width"));
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v8::Handle<v8::Value> height = rect->Get(v8::String::New("height"));
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if (!x->IsNumber() || !y->IsNumber() ||
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!width->IsNumber() || !height->IsNumber())
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return gfx::Rect();
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else
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return gfx::Rect(x->IntegerValue(), y->IntegerValue(),
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width->IntegerValue(), height->IntegerValue());
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}
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operator std::vector<std::string>() {
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std::vector<std::string> array;
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v8::Handle<v8::Array> v8_array = v8::Handle<v8::Array>::Cast(value_);
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for (uint32_t i = 0; i < v8_array->Length(); ++i)
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array.push_back(FromV8Value(v8_array->Get(i)));
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return array;
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}
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operator std::map<std::string, std::string>() {
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std::map<std::string, std::string> dict;
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v8::Handle<v8::Object> v8_dict = value_->ToObject();
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v8::Handle<v8::Array> v8_keys = v8_dict->GetOwnPropertyNames();
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for (uint32_t i = 0; i < v8_keys->Length(); ++i) {
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v8::Handle<v8::Value> v8_key = v8_keys->Get(i);
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std::string key = FromV8Value(v8_key);
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dict[key] = std::string(FromV8Value(v8_dict->Get(v8_key)));
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}
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return dict;
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}
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operator atom::NativeWindow*() {
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using atom::api::Window;
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if (value_->IsObject()) {
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Window* window = Window::Unwrap<Window>(value_->ToObject());
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if (window && window->window())
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return window->window();
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}
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return NULL;
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}
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operator v8::Persistent<v8::Function>() {
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return v8::Persistent<v8::Function>::New(
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node::node_isolate,
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v8::Handle<v8::Function>::Cast(value_));
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}
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v8::Handle<v8::Value> value_;
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};
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// Convert arbitrary supported native type to V8 value.
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inline v8::Handle<v8::Value> ToV8Value(int i) {
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return v8::Integer::New(i);
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}
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inline v8::Handle<v8::Value> ToV8Value(bool b) {
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return v8::Boolean::New(b);
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}
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inline v8::Handle<v8::Value> ToV8Value(const char* s) {
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return v8::String::New(s);
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}
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inline v8::Handle<v8::Value> ToV8Value(const std::string& s) {
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return v8::String::New(s.data(), s.size());
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}
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inline v8::Handle<v8::Value> ToV8Value(const string16& s) {
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return v8::String::New(reinterpret_cast<const uint16_t*>(s.data()), s.size());
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}
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inline v8::Handle<v8::Value> ToV8Value(const GURL& url) {
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return ToV8Value(url.spec());
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}
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inline v8::Handle<v8::Value> ToV8Value(const base::FilePath& path) {
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std::string path_string(path.AsUTF8Unsafe());
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return v8::String::New(path_string.data(), path_string.size());
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}
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inline v8::Handle<v8::Value> ToV8Value(void* whatever) {
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return v8::Undefined();
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}
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inline
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v8::Handle<v8::Value> ToV8Value(const std::vector<base::FilePath>& paths) {
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v8::Handle<v8::Array> result = v8::Array::New(paths.size());
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for (size_t i = 0; i < paths.size(); ++i)
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result->Set(i, ToV8Value(paths[i]));
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return result;
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}
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// Check if a V8 Value is of specified type.
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template<class T> inline
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bool V8ValueCanBeConvertedTo(v8::Handle<v8::Value> value) {
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return false;
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}
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template<> inline
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bool V8ValueCanBeConvertedTo<int>(v8::Handle<v8::Value> value) {
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return value->IsNumber();
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}
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template<> inline
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bool V8ValueCanBeConvertedTo<bool>(v8::Handle<v8::Value> value) {
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return value->IsBoolean();
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}
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template<> inline
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bool V8ValueCanBeConvertedTo<std::string>(v8::Handle<v8::Value> value) {
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return value->IsString();
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}
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template<> inline
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bool V8ValueCanBeConvertedTo<string16>(v8::Handle<v8::Value> value) {
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return V8ValueCanBeConvertedTo<std::string>(value);
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}
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template<> inline
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bool V8ValueCanBeConvertedTo<GURL>(v8::Handle<v8::Value> value) {
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return V8ValueCanBeConvertedTo<std::string>(value);
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}
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template<> inline
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bool V8ValueCanBeConvertedTo<base::FilePath>(v8::Handle<v8::Value> value) {
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return V8ValueCanBeConvertedTo<std::string>(value);
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}
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template<> inline
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bool V8ValueCanBeConvertedTo<gfx::Rect>(v8::Handle<v8::Value> value) {
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return value->IsObject();
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}
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template<> inline
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bool V8ValueCanBeConvertedTo<std::vector<std::string>>(
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v8::Handle<v8::Value> value) {
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return value->IsArray();
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}
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template<> inline
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bool V8ValueCanBeConvertedTo<std::map<std::string, std::string>>(
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v8::Handle<v8::Value> value) {
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return value->IsObject();
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}
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template<> inline
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bool V8ValueCanBeConvertedTo<atom::NativeWindow*>(v8::Handle<v8::Value> value) {
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using atom::api::Window;
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if (value->IsObject()) {
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Window* window = Window::Unwrap<Window>(value->ToObject());
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if (window && window->window())
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return true;
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}
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return false;
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}
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template<> inline
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bool V8ValueCanBeConvertedTo<v8::Persistent<v8::Function>>(
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v8::Handle<v8::Value> value) {
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return value->IsFunction();
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}
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// Check and convert V8's Arguments to native types.
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template<typename T1> inline
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bool FromV8Arguments(const v8::Arguments& args, T1* value, int index = 0) {
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if (!V8ValueCanBeConvertedTo<T1>(args[index]))
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return false;
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*value = static_cast<const T1&>(FromV8Value(args[index]));
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return true;
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}
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template<typename T1, typename T2> inline
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bool FromV8Arguments(const v8::Arguments& args, T1* a1, T2* a2) {
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return FromV8Arguments<T1>(args, a1) && FromV8Arguments<T2>(args, a2, 1);
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}
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template<typename T1, typename T2, typename T3> inline
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bool FromV8Arguments(const v8::Arguments& args, T1* a1, T2* a2, T3* a3) {
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return FromV8Arguments<T1, T2>(args, a1, a2) &&
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FromV8Arguments<T3>(args, a3, 2);
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}
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template<typename T1, typename T2, typename T3, typename T4> inline
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bool FromV8Arguments(const v8::Arguments& args,
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T1* a1,
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T2* a2,
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T3* a3,
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T4* a4) {
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return FromV8Arguments<T1, T2, T3>(args, a1, a2, a3) &&
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FromV8Arguments<T4>(args, a4, 3);
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}
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template<typename T1, typename T2, typename T3, typename T4, typename T5> inline
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bool FromV8Arguments(const v8::Arguments& args,
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T1* a1,
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T2* a2,
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T3* a3,
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T4* a4,
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T5* a5) {
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return FromV8Arguments<T1, T2, T3, T4>(args, a1, a2, a3, a4) &&
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FromV8Arguments<T5>(args, a5, 4);
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}
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template<typename T1, typename T2, typename T3, typename T4, typename T5,
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typename T6> inline
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bool FromV8Arguments(const v8::Arguments& args,
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T1* a1,
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T2* a2,
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T3* a3,
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T4* a4,
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T5* a5,
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T6* a6) {
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return FromV8Arguments<T1, T2, T3, T4, T5>(args, a1, a2, a3, a4, a5) &&
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FromV8Arguments<T6>(args, a6, 5);
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}
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template<typename T1, typename T2, typename T3, typename T4, typename T5,
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typename T6, typename T7> inline
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bool FromV8Arguments(const v8::Arguments& args,
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T1* a1,
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T2* a2,
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T3* a3,
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T4* a4,
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T5* a5,
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T6* a6,
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T7* a7) {
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return
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FromV8Arguments<T1, T2, T3, T4, T5, T6>(args, a1, a2, a3, a4, a5, a6) &&
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FromV8Arguments<T7>(args, a7, 6);
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}
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#endif // COMMON_V8_CONVERSIONS_H_
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