athena: Add support for PDF

athena/main/athena_renderer_pdf_helper.cc

Index: athena/main/athena_renderer_pdf_helper.cc
diff --git a/athena/main/athena_renderer_pdf_helper.cc b/athena/main/athena_renderer_pdf_helper.cc
new file mode 100644
index 0000000000000000000000000000000000000000..85bc003e8258937826b244962b3db4c0b250184f
--- /dev/null
+++ b/athena/main/athena_renderer_pdf_helper.cc
@@ -0,0 +1,73 @@
+// Copyright 2014 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 "athena/main/athena_renderer_pdf_helper.h"
+
+#include "components/pdf/renderer/pepper_pdf_host.h"
+#include "content/public/renderer/renderer_ppapi_host.h"
+#include "ppapi/host/host_factory.h"
+#include "ppapi/host/ppapi_host.h"
+#include "ppapi/host/resource_host.h"
+#include "ppapi/proxy/ppapi_messages.h"
+
+namespace athena {
+
+namespace {
+
+class PDFRendererHostFactory : public ppapi::host::HostFactory {
+ public:
+  explicit PDFRendererHostFactory(content::RendererPpapiHost* host)
+      : host_(host) {}
+  virtual ~PDFRendererHostFactory() {}
+
+ private:
+  // ppapi::host::HostFactory:
+  virtual scoped_ptr<ppapi::host::ResourceHost> CreateResourceHost(
+      ppapi::host::PpapiHost* host,
+      const ppapi::proxy::ResourceMessageCallParams& params,
+      PP_Instance instance,
+      const IPC::Message& message) OVERRIDE {
+    DCHECK_EQ(host_->GetPpapiHost(), host);
+    // Make sure the plugin is giving us a valid instance for this resource.
+    if (!host_->IsValidInstance(instance))
+      return scoped_ptr<ppapi::host::ResourceHost>();
+
+    if (host_->GetPpapiHost()->permissions().HasPermission(
+            ppapi::PERMISSION_PRIVATE)) {
+      switch (message.type()) {
+        case PpapiHostMsg_PDF_Create::ID:
+          return scoped_ptr<ppapi::host::ResourceHost>(
+              new pdf::PepperPDFHost(host_, instance, params.pp_resource()));
+
+        case PpapiHostMsg_FlashFontFile_Create::ID:
+          return scoped_ptr<ppapi::host::ResourceHost>(
+              new ppapi::host::ResourceHost(host_->GetPpapiHost(),
+                                            instance,
+                                            params.pp_resource()));
+      }
+    }
+
+    return scoped_ptr<ppapi::host::ResourceHost>();
+  }
+
+  // Not owned by this object.
+  content::RendererPpapiHost* host_;
+
+  DISALLOW_COPY_AND_ASSIGN(PDFRendererHostFactory);
+};
+
+}  // namespace
+
+AthenaRendererPDFHelper::AthenaRendererPDFHelper(content::RenderFrame* frame)
+    : content::RenderFrameObserver(frame) {}
+
+AthenaRendererPDFHelper::~AthenaRendererPDFHelper() {}
+
+void AthenaRendererPDFHelper::DidCreatePepperPlugin(
+    content::RendererPpapiHost* host) {
+  host->GetPpapiHost()->AddHostFactoryFilter(
+      scoped_ptr<ppapi::host::HostFactory>(new PDFRendererHostFactory(host)));
+}
+
+}  // namespace athena