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// Copyright Joyent, Inc. and other Node contributors.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a
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// copy of this software and associated documentation files (the
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// "Software"), to deal in the Software without restriction, including
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// without limitation the rights to use, copy, modify, merge, publish,
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// distribute, sublicense, and/or sell copies of the Software, and to permit
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// persons to whom the Software is furnished to do so, subject to the
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// following conditions:
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//
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// The above copyright notice and this permission notice shall be included
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// in all copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
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// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
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// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
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// USE OR OTHER DEALINGS IN THE SOFTWARE.
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#include <node.h>
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#include <handle_wrap.h>
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#include <stdlib.h>
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using namespace v8;
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namespace node {
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#define UNWRAP \
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assert(!args.Holder().IsEmpty()); \
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assert(args.Holder()->InternalFieldCount() > 0); \
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FSEventWrap* wrap = \
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static_cast<FSEventWrap*>(args.Holder()->GetPointerFromInternalField(0)); \
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if (!wrap) { \
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uv_err_t err; \
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err.code = UV_EBADF; \
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SetErrno(err); \
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return scope.Close(Integer::New(-1)); \
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}
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class FSEventWrap: public HandleWrap {
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public:
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static void Initialize(Handle<Object> target);
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static Handle<Value> New(const Arguments& args);
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static Handle<Value> Start(const Arguments& args);
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static Handle<Value> Close(const Arguments& args);
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private:
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FSEventWrap(Handle<Object> object);
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virtual ~FSEventWrap();
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static void OnEvent(uv_fs_event_t* handle, const char* filename, int events,
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int status);
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uv_fs_event_t handle_;
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bool initialized_;
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};
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FSEventWrap::FSEventWrap(Handle<Object> object): HandleWrap(object,
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(uv_handle_t*)&handle_) {
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handle_.data = reinterpret_cast<void*>(this);
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initialized_ = false;
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}
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FSEventWrap::~FSEventWrap() {
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assert(initialized_ == false);
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}
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void FSEventWrap::Initialize(Handle<Object> target) {
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HandleWrap::Initialize(target);
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HandleScope scope;
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Local<FunctionTemplate> t = FunctionTemplate::New(New);
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t->InstanceTemplate()->SetInternalFieldCount(1);
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t->SetClassName(String::NewSymbol("FSEvent"));
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NODE_SET_PROTOTYPE_METHOD(t, "start", Start);
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NODE_SET_PROTOTYPE_METHOD(t, "close", Close);
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target->Set(String::NewSymbol("FSEvent"),
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Persistent<FunctionTemplate>::New(t)->GetFunction());
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}
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Handle<Value> FSEventWrap::New(const Arguments& args) {
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HandleScope scope;
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assert(args.IsConstructCall());
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new FSEventWrap(args.This());
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return scope.Close(args.This());
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}
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Handle<Value> FSEventWrap::Start(const Arguments& args) {
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HandleScope scope;
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UNWRAP
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if (args.Length() < 1 || !args[0]->IsString()) {
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return ThrowException(Exception::TypeError(String::New("Bad arguments")));
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}
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String::Utf8Value path(args[0]->ToString());
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int r = uv_fs_event_init(uv_default_loop(), &wrap->handle_, *path, OnEvent, 0);
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if (r == 0) {
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// Check for persistent argument
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if (!args[1]->IsTrue()) {
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uv_unref(uv_default_loop());
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}
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wrap->initialized_ = true;
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} else {
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SetErrno(uv_last_error(uv_default_loop()));
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}
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return scope.Close(Integer::New(r));
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}
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void FSEventWrap::OnEvent(uv_fs_event_t* handle, const char* filename,
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int events, int status) {
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HandleScope scope;
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Local<String> eventStr;
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FSEventWrap* wrap = reinterpret_cast<FSEventWrap*>(handle->data);
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assert(wrap->object_.IsEmpty() == false);
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if (status) {
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SetErrno(uv_last_error(uv_default_loop()));
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eventStr = String::Empty();
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} else {
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switch (events) {
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case UV_RENAME:
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eventStr = String::New("rename");
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break;
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case UV_CHANGE:
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eventStr = String::New("change");
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break;
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}
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}
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Local<Value> argv[3] = {
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Integer::New(status),
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eventStr,
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filename ? (Local<Value>)String::New(filename) : Local<Value>::New(v8::Null())
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};
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MakeCallback(wrap->object_, "onchange", 3, argv);
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}
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Handle<Value> FSEventWrap::Close(const Arguments& args) {
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HandleScope scope;
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UNWRAP
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if (!wrap->initialized_)
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return Undefined();
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wrap->initialized_ = false;
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return HandleWrap::Close(args);
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}
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} // namespace node
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NODE_MODULE(node_fs_event_wrap, node::FSEventWrap::Initialize)
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