listen to ipc messages from plugin to perform SaveAs op

chromium_src/components/pdf/renderer/pepper_pdf_host.cc

@@ -0,0 +1,113 @@
+// 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 "components/pdf/renderer/pepper_pdf_host.h"
+
+#include "base/memory/ptr_util.h"
+#include "components/pdf/common/pdf_messages.h"
+#include "content/public/common/referrer.h"
+#include "content/public/renderer/pepper_plugin_instance.h"
+#include "content/public/renderer/render_frame.h"
+#include "content/public/renderer/renderer_ppapi_host.h"
+#include "ppapi/host/dispatch_host_message.h"
+#include "ppapi/proxy/ppapi_messages.h"
+
+namespace pdf {
+
+PepperPDFHost::PepperPDFHost(content::RendererPpapiHost* host,
+                             PP_Instance instance,
+                             PP_Resource resource)
+    : ppapi::host::ResourceHost(host->GetPpapiHost(), instance, resource),
+      host_(host) {}
+
+PepperPDFHost::~PepperPDFHost() {}
+
+int32_t PepperPDFHost::OnResourceMessageReceived(
+    const IPC::Message& msg,
+    ppapi::host::HostMessageContext* context) {
+  PPAPI_BEGIN_MESSAGE_MAP(PepperPDFHost, msg)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_DidStartLoading,
+                                        OnHostMsgDidStartLoading)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_DidStopLoading,
+                                        OnHostMsgDidStopLoading)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_SaveAs,
+                                        OnHostMsgSaveAs)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_SetSelectedText,
+                                      OnHostMsgSetSelectedText)
+    PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_SetLinkUnderCursor,
+                                      OnHostMsgSetLinkUnderCursor)
+  PPAPI_END_MESSAGE_MAP()
+  return PP_ERROR_FAILED;
+}
+
+int32_t PepperPDFHost::OnHostMsgDidStartLoading(
+    ppapi::host::HostMessageContext* context) {
+  content::RenderFrame* render_frame = GetRenderFrame();
+  if (!render_frame)
+    return PP_ERROR_FAILED;
+
+  render_frame->DidStartLoading();
+  return PP_OK;
+}
+
+int32_t PepperPDFHost::OnHostMsgDidStopLoading(
+    ppapi::host::HostMessageContext* context) {
+  content::RenderFrame* render_frame = GetRenderFrame();
+  if (!render_frame)
+    return PP_ERROR_FAILED;
+
+  render_frame->DidStopLoading();
+  return PP_OK;
+}
+
+int32_t PepperPDFHost::OnHostMsgSaveAs(
+    ppapi::host::HostMessageContext* context) {
+  content::PepperPluginInstance* instance =
+      host_->GetPluginInstance(pp_instance());
+  if (!instance)
+    return PP_ERROR_FAILED;
+
+  content::RenderFrame* render_frame = instance->GetRenderFrame();
+  if (!render_frame)
+    return PP_ERROR_FAILED;
+
+  GURL url = instance->GetPluginURL();
+  content::Referrer referrer;
+  referrer.url = url;
+  referrer.policy = blink::WebReferrerPolicyDefault;
+  referrer = content::Referrer::SanitizeForRequest(url, referrer);
+  render_frame->Send(
+      new PDFHostMsg_PDFSaveURLAs(render_frame->GetRoutingID(), url, referrer));
+  return PP_OK;
+}
+
+int32_t PepperPDFHost::OnHostMsgSetSelectedText(
+    ppapi::host::HostMessageContext* context,
+    const base::string16& selected_text) {
+  content::PepperPluginInstance* instance =
+      host_->GetPluginInstance(pp_instance());
+  if (!instance)
+    return PP_ERROR_FAILED;
+  instance->SetSelectedText(selected_text);
+  return PP_OK;
+}
+
+int32_t PepperPDFHost::OnHostMsgSetLinkUnderCursor(
+    ppapi::host::HostMessageContext* context,
+    const std::string& url) {
+  content::PepperPluginInstance* instance =
+      host_->GetPluginInstance(pp_instance());
+  if (!instance)
+    return PP_ERROR_FAILED;
+  instance->SetLinkUnderCursor(url);
+  return PP_OK;
+}
+
+content::RenderFrame* PepperPDFHost::GetRenderFrame() {
+  content::PepperPluginInstance* instance =
+      host_->GetPluginInstance(pp_instance());
+  return instance ? instance->GetRenderFrame() : nullptr;
+}
+
+}  // namespace pdf

chromium_src/components/pdf/renderer/pepper_pdf_host.h

@@ -0,0 +1,52 @@
+// 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.
+
+#ifndef COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_
+#define COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_
+
+#include "base/compiler_specific.h"
+#include "base/macros.h"
+#include "base/strings/string16.h"
+#include "ppapi/host/resource_host.h"
+
+namespace content {
+class RenderFrame;
+class RendererPpapiHost;
+}
+
+namespace pdf {
+
+class PdfAccessibilityTree;
+
+class PepperPDFHost : public ppapi::host::ResourceHost {
+ public:
+  PepperPDFHost(content::RendererPpapiHost* host,
+                PP_Instance instance,
+                PP_Resource resource);
+  ~PepperPDFHost() override;
+
+  // ppapi::host::ResourceHost:
+  int32_t OnResourceMessageReceived(
+      const IPC::Message& msg,
+      ppapi::host::HostMessageContext* context) override;
+
+ private:
+  int32_t OnHostMsgDidStartLoading(ppapi::host::HostMessageContext* context);
+  int32_t OnHostMsgDidStopLoading(ppapi::host::HostMessageContext* context);
+  int32_t OnHostMsgSaveAs(ppapi::host::HostMessageContext* context);
+  int32_t OnHostMsgSetSelectedText(ppapi::host::HostMessageContext* context,
+                                   const base::string16& selected_text);
+  int32_t OnHostMsgSetLinkUnderCursor(ppapi::host::HostMessageContext* context,
+                                      const std::string& url);
+
+  content::RenderFrame* GetRenderFrame();
+
+  content::RendererPpapiHost* const host_;
+
+  DISALLOW_COPY_AND_ASSIGN(PepperPDFHost);
+};
+
+}  // namespace pdf
+
+#endif  // COMPONENTS_PDF_RENDERER_PEPPER_PDF_HOST_H_