Move the Pepper implementation from webkit/glue/plugins/pepper_* to...

webkit/plugins/ppapi/npapi_glue.cc

+// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "webkit/plugins/ppapi/npapi_glue.h"
+
+#include "base/logging.h"
+#include "base/ref_counted.h"
+#include "base/string_util.h"
+#include "webkit/plugins/ppapi/plugin_object.h"
+#include "webkit/plugins/ppapi/var.h"
+#include "third_party/npapi/bindings/npapi.h"
+#include "third_party/npapi/bindings/npruntime.h"
+#include "third_party/WebKit/WebKit/chromium/public/WebBindings.h"
+
+using WebKit::WebBindings;
+
+namespace webkit {
+namespace ppapi {
+
+namespace {
+
+const char kInvalidPluginValue[] = "Error: Plugin returned invalid value.";
+
+}  // namespace
+
+// Utilities -------------------------------------------------------------------
+
+bool PPVarToNPVariant(PP_Var var, NPVariant* result) {
+  switch (var.type) {
+    case PP_VARTYPE_UNDEFINED:
+      VOID_TO_NPVARIANT(*result);
+      break;
+    case PP_VARTYPE_NULL:
+      NULL_TO_NPVARIANT(*result);
+      break;
+    case PP_VARTYPE_BOOL:
+      BOOLEAN_TO_NPVARIANT(var.value.as_bool, *result);
+      break;
+    case PP_VARTYPE_INT32:
+      INT32_TO_NPVARIANT(var.value.as_int, *result);
+      break;
+    case PP_VARTYPE_DOUBLE:
+      DOUBLE_TO_NPVARIANT(var.value.as_double, *result);
+      break;
+    case PP_VARTYPE_STRING: {
+      scoped_refptr<StringVar> string(StringVar::FromPPVar(var));
+      if (!string) {
+        VOID_TO_NPVARIANT(*result);
+        return false;
+      }
+      const std::string& value = string->value();
+      STRINGN_TO_NPVARIANT(base::strdup(value.c_str()), value.size(), *result);
+      break;
+    }
+    case PP_VARTYPE_OBJECT: {
+      scoped_refptr<ObjectVar> object(ObjectVar::FromPPVar(var));
+      if (!object) {
+        VOID_TO_NPVARIANT(*result);
+        return false;
+      }
+      OBJECT_TO_NPVARIANT(WebBindings::retainObject(object->np_object()),
+                          *result);
+      break;
+    }
+  }
+  return true;
+}
+
+// PPResultAndExceptionToNPResult ----------------------------------------------
+
+PPResultAndExceptionToNPResult::PPResultAndExceptionToNPResult(
+    NPObject* object_var,
+    NPVariant* np_result)
+    : object_var_(object_var),
+      np_result_(np_result),
+      exception_(PP_MakeUndefined()),
+      success_(false),
+      checked_exception_(false) {
+}
+
+PPResultAndExceptionToNPResult::~PPResultAndExceptionToNPResult() {
+  // The user should have called SetResult or CheckExceptionForNoResult
+  // before letting this class go out of scope, or the exception will have
+  // been lost.
+  DCHECK(checked_exception_);
+
+  ObjectVar::PluginReleasePPVar(exception_);
+}
+
+// Call this with the return value of the PPAPI function. It will convert
+// the result to the NPVariant output parameter and pass any exception on to
+// the JS engine. It will update the success flag and return it.
+bool PPResultAndExceptionToNPResult::SetResult(PP_Var result) {
+  DCHECK(!checked_exception_);  // Don't call more than once.
+  DCHECK(np_result_);  // Should be expecting a result.
+
+  checked_exception_ = true;
+
+  if (has_exception()) {
+    ThrowException();
+    success_ = false;
+  } else if (!PPVarToNPVariant(result, np_result_)) {
+    WebBindings::setException(object_var_, kInvalidPluginValue);
+    success_ = false;
+  } else {
+    success_ = true;
+  }
+
+  // No matter what happened, we need to release the reference to the
+  // value passed in. On success, a reference to this value will be in
+  // the np_result_.
+  Var::PluginReleasePPVar(result);
+  return success_;
+}
+
+// Call this after calling a PPAPI function that could have set the
+// exception. It will pass the exception on to the JS engine and update
+// the success flag.
+//
+// The success flag will be returned.
+bool PPResultAndExceptionToNPResult::CheckExceptionForNoResult() {
+  DCHECK(!checked_exception_);  // Don't call more than once.
+  DCHECK(!np_result_);  // Can't have a result when doing this.
+
+  checked_exception_ = true;
+
+  if (has_exception()) {
+    ThrowException();
+    success_ = false;
+    return false;
+  }
+  success_ = true;
+  return true;
+}
+
+// Call this to ignore any exception. This prevents the DCHECK from failing
+// in the destructor.
+void PPResultAndExceptionToNPResult::IgnoreException() {
+  checked_exception_ = true;
+}
+
+// Throws the current exception to JS. The exception must be set.
+void PPResultAndExceptionToNPResult::ThrowException() {
+  scoped_refptr<StringVar> string(StringVar::FromPPVar(exception_));
+  if (string) {
+    WebBindings::setException(object_var_, string->value().c_str());
+  }
+}
+
+// PPVarArrayFromNPVariantArray ------------------------------------------------
+
+PPVarArrayFromNPVariantArray::PPVarArrayFromNPVariantArray(PluginModule* module,
+    size_t size,
+    const NPVariant* variants)
+    : size_(size) {
+  if (size_ > 0) {
+    array_.reset(new PP_Var[size_]);
+    for (size_t i = 0; i < size_; i++)
+      array_[i] = Var::NPVariantToPPVar(module, &variants[i]);
+  }
+}
+
+PPVarArrayFromNPVariantArray::~PPVarArrayFromNPVariantArray() {
+  for (size_t i = 0; i < size_; i++)
+    Var::PluginReleasePPVar(array_[i]);
+}
+
+// PPVarFromNPObject -----------------------------------------------------------
+
+PPVarFromNPObject::PPVarFromNPObject(PluginModule* module, NPObject* object)
+    : var_(ObjectVar::NPObjectToPPVar(module, object)) {
+}
+
+PPVarFromNPObject::~PPVarFromNPObject() {
+  Var::PluginReleasePPVar(var_);
+}
+
+// NPObjectAccessorWithIdentifier ----------------------------------------------
+
+NPObjectAccessorWithIdentifier::NPObjectAccessorWithIdentifier(
+    NPObject* object,
+    NPIdentifier identifier,
+    bool allow_integer_identifier)
+    : object_(PluginObject::FromNPObject(object)),
+      identifier_(PP_MakeUndefined()) {
+  if (object_) {
+    identifier_ = Var::NPIdentifierToPPVar(object_->module(), identifier);
+    if (identifier_.type == PP_VARTYPE_INT32 && !allow_integer_identifier)
+      identifier_.type = PP_VARTYPE_UNDEFINED;  // Mark it invalid.
+  }
+}
+
+NPObjectAccessorWithIdentifier::~NPObjectAccessorWithIdentifier() {
+  Var::PluginReleasePPVar(identifier_);
+}
+
+}  // namespace ppapi
+}  // namespace webkit