components/pdf/renderer/pepper_pdf_host.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "components/pdf/renderer/pepper_pdf_host.h"
   6
   7 #include "components/pdf/common/pdf_messages.h"
   8 #include "content/public/common/referrer.h"
   9 #include "content/public/renderer/pepper_plugin_instance.h"
  10 #include "content/public/renderer/render_thread.h"
  11 #include "content/public/renderer/render_view.h"
  12 #include "content/public/renderer/renderer_ppapi_host.h"
  13 #include "ppapi/host/dispatch_host_message.h"
  14 #include "ppapi/host/host_message_context.h"
  15 #include "ppapi/host/ppapi_host.h"
  16 #include "ppapi/proxy/host_dispatcher.h"
  17 #include "ppapi/proxy/ppapi_messages.h"
  18 #include "ppapi/proxy/ppb_image_data_proxy.h"
  19 #include "ppapi/shared_impl/ppb_image_data_shared.h"
  20 #include "ppapi/shared_impl/scoped_pp_resource.h"
  21 #include "ppapi/thunk/enter.h"
  22 #include "ppapi/thunk/ppb_image_data_api.h"
  23 #include "third_party/WebKit/public/web/WebDocument.h"
  24 #include "third_party/WebKit/public/web/WebElement.h"
  25 #include "third_party/WebKit/public/web/WebLocalFrame.h"
  26 #include "third_party/WebKit/public/web/WebPluginContainer.h"
  27 #include "third_party/WebKit/public/web/WebView.h"
  28
  29 namespace pdf {
  30
  31 namespace {
  32 // --single-process model may fail in CHECK(!g_print_client) if there exist
  33 // more than two RenderThreads, so here we use TLS for g_print_client.
  34 // See http://crbug.com/457580.
  35 base::LazyInstance<base::ThreadLocalPointer<PepperPDFHost::PrintClient>>::Leaky
  36     g_print_client_tls = LAZY_INSTANCE_INITIALIZER;
  37
  38 }  // namespace
  39
  40 PepperPDFHost::PepperPDFHost(content::RendererPpapiHost* host,
  41                              PP_Instance instance,
  42                              PP_Resource resource)
  43     : ppapi::host::ResourceHost(host->GetPpapiHost(), instance, resource),
  44       host_(host) {}
  45
  46 PepperPDFHost::~PepperPDFHost() {}
  47
  48 // static
  49 bool PepperPDFHost::InvokePrintingForInstance(PP_Instance instance_id) {
  50   return g_print_client_tls.Pointer()->Get()
  51              ? g_print_client_tls.Pointer()->Get()->Print(instance_id)
  52              : false;
  53 }
  54
  55 // static
  56 void PepperPDFHost::SetPrintClient(PepperPDFHost::PrintClient* client) {
  57   CHECK(!g_print_client_tls.Pointer()->Get())
  58       << "There should only be a single PrintClient for one RenderThread.";
  59   g_print_client_tls.Pointer()->Set(client);
  60 }
  61
  62 int32_t PepperPDFHost::OnResourceMessageReceived(
  63     const IPC::Message& msg,
  64     ppapi::host::HostMessageContext* context) {
  65   PPAPI_BEGIN_MESSAGE_MAP(PepperPDFHost, msg)
  66     PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_DidStartLoading,
  67                                         OnHostMsgDidStartLoading)
  68     PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_DidStopLoading,
  69                                         OnHostMsgDidStopLoading)
  70     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_UserMetricsRecordAction,
  71                                       OnHostMsgUserMetricsRecordAction)
  72     PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_HasUnsupportedFeature,
  73                                         OnHostMsgHasUnsupportedFeature)
  74     PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_Print, OnHostMsgPrint)
  75     PPAPI_DISPATCH_HOST_RESOURCE_CALL_0(PpapiHostMsg_PDF_SaveAs,
  76                                         OnHostMsgSaveAs)
  77     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_SetSelectedText,
  78                                       OnHostMsgSetSelectedText)
  79     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_SetLinkUnderCursor,
  80                                       OnHostMsgSetLinkUnderCursor)
  81     PPAPI_DISPATCH_HOST_RESOURCE_CALL(PpapiHostMsg_PDF_SetContentRestriction,
  82                                       OnHostMsgSetContentRestriction)
  83   PPAPI_END_MESSAGE_MAP()
  84   return PP_ERROR_FAILED;
  85 }
  86
  87 int32_t PepperPDFHost::OnHostMsgDidStartLoading(
  88     ppapi::host::HostMessageContext* context) {
  89   content::PepperPluginInstance* instance =
  90       host_->GetPluginInstance(pp_instance());
  91   if (!instance)
  92     return PP_ERROR_FAILED;
  93   instance->GetRenderView()->DidStartLoading();
  94   return PP_OK;
  95 }
  96
  97 int32_t PepperPDFHost::OnHostMsgDidStopLoading(
  98     ppapi::host::HostMessageContext* context) {
  99   content::PepperPluginInstance* instance =
 100       host_->GetPluginInstance(pp_instance());
 101   if (!instance)
 102     return PP_ERROR_FAILED;
 103   instance->GetRenderView()->DidStopLoading();
 104   return PP_OK;
 105 }
 106
 107 int32_t PepperPDFHost::OnHostMsgSetContentRestriction(
 108     ppapi::host::HostMessageContext* context,
 109     int restrictions) {
 110   content::PepperPluginInstance* instance =
 111       host_->GetPluginInstance(pp_instance());
 112   if (!instance)
 113     return PP_ERROR_FAILED;
 114   instance->GetRenderView()->Send(new PDFHostMsg_PDFUpdateContentRestrictions(
 115       instance->GetRenderView()->GetRoutingID(), restrictions));
 116   return PP_OK;
 117 }
 118
 119 int32_t PepperPDFHost::OnHostMsgUserMetricsRecordAction(
 120     ppapi::host::HostMessageContext* context,
 121     const std::string& action) {
 122   if (action.empty())
 123     return PP_ERROR_FAILED;
 124   content::RenderThread::Get()->RecordComputedAction(action);
 125   return PP_OK;
 126 }
 127
 128 int32_t PepperPDFHost::OnHostMsgHasUnsupportedFeature(
 129     ppapi::host::HostMessageContext* context) {
 130   content::PepperPluginInstance* instance =
 131       host_->GetPluginInstance(pp_instance());
 132   if (!instance)
 133     return PP_ERROR_FAILED;
 134
 135   blink::WebView* view =
 136       instance->GetContainer()->element().document().frame()->view();
 137   content::RenderView* render_view = content::RenderView::FromWebView(view);
 138   render_view->Send(
 139       new PDFHostMsg_PDFHasUnsupportedFeature(render_view->GetRoutingID()));
 140   return PP_OK;
 141 }
 142
 143 int32_t PepperPDFHost::OnHostMsgPrint(
 144     ppapi::host::HostMessageContext* context) {
 145   return InvokePrintingForInstance(pp_instance()) ? PP_OK : PP_ERROR_FAILED;
 146 }
 147
 148 int32_t PepperPDFHost::OnHostMsgSaveAs(
 149     ppapi::host::HostMessageContext* context) {
 150   content::PepperPluginInstance* instance =
 151       host_->GetPluginInstance(pp_instance());
 152   if (!instance)
 153     return PP_ERROR_FAILED;
 154   GURL url = instance->GetPluginURL();
 155   content::RenderView* render_view = instance->GetRenderView();
 156   blink::WebLocalFrame* frame =
 157       render_view->GetWebView()->mainFrame()->toWebLocalFrame();
 158   content::Referrer referrer = content::Referrer::SanitizeForRequest(
 159       url, content::Referrer(frame->document().url(),
 160                              frame->document().referrerPolicy()));
 161   render_view->Send(
 162       new PDFHostMsg_PDFSaveURLAs(render_view->GetRoutingID(), url, referrer));
 163   return PP_OK;
 164 }
 165
 166 int32_t PepperPDFHost::OnHostMsgSetSelectedText(
 167     ppapi::host::HostMessageContext* context,
 168     const base::string16& selected_text) {
 169   content::PepperPluginInstance* instance =
 170       host_->GetPluginInstance(pp_instance());
 171   if (!instance)
 172     return PP_ERROR_FAILED;
 173   instance->SetSelectedText(selected_text);
 174   return PP_OK;
 175 }
 176
 177 int32_t PepperPDFHost::OnHostMsgSetLinkUnderCursor(
 178     ppapi::host::HostMessageContext* context,
 179     const std::string& url) {
 180   content::PepperPluginInstance* instance =
 181       host_->GetPluginInstance(pp_instance());
 182   if (!instance)
 183     return PP_ERROR_FAILED;
 184   instance->SetLinkUnderCursor(url);
 185   return PP_OK;
 186 }
 187
 188 }  // namespace pdf