Importer: Adds support for previous.

lib/index.js

@@ -173,8 +173,8 @@ function getOptions(options) {
   };
 
   if (importer) {
-    options.importer = function(file, key) {
-      importer(file, function(data) {
+    options.importer = function(file, prev, key) {
+      importer(file, prev, function(data) {
         binding.importedCallback({
           index: key,
           objectLiteral: data

src/binding.cpp

@@ -25,21 +25,23 @@ void dispatched_async_uv_callback(uv_async_t *req){
 
   Handle<Value> argv[] = {
     NanNew<String>(strdup(ctx_w->file)),
+    NanNew<String>(strdup(ctx_w->prev)),
     NanNew<Number>(imports_collection.size() - 1)
   };
 
-  NanNew<Value>(ctx_w->importer_callback->Call(2, argv));
+  NanNew<Value>(ctx_w->importer_callback->Call(3, argv));
 
   if (try_catch.HasCaught()) {
     node::FatalException(try_catch);
   }
 }
 
-struct Sass_Import** sass_importer(const char* file, void* cookie)
+struct Sass_Import** sass_importer(const char* file, const char* prev, void* cookie)
 {
   sass_context_wrapper* ctx_w = static_cast<sass_context_wrapper*>(cookie);
 
   ctx_w->file = strdup(file);
+  ctx_w->prev = strdup(prev);
   ctx_w->async.data = (void*)ctx_w;
   uv_async_send(&ctx_w->async);
 

src/sass_context_wrapper.cpp

@@ -43,6 +43,7 @@ extern "C" {
     delete ctx_w->error_callback;
     delete ctx_w->importer_callback;
     delete ctx_w->file;
+    delete ctx_w->prev;
     delete ctx_w->cookie;
 
     uv_mutex_destroy(&ctx_w->importer_mutex);

src/sass_context_wrapper.h

@@ -20,6 +20,7 @@ extern "C" {
     uv_cond_t importer_condition_variable;
     uv_async_t async;
     const char* file;
+    const char* prev;
     void* cookie;
     Sass_Import** imports;
     NanCallback* success_callback;