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// Copyright (c) 2011 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 "ppapi/proxy/ppb_pdf_proxy.h"
#include <string.h> // For memcpy.
#include <map>
#include "base/logging.h"
#include "base/memory/linked_ptr.h"
#include "build/build_config.h"
#include "ppapi/c/private/ppb_pdf.h"
#include "ppapi/proxy/plugin_dispatcher.h"
#include "ppapi/proxy/plugin_resource_tracker.h"
#include "ppapi/proxy/ppapi_messages.h"
#include "ppapi/thunk/enter.h"
#include "ppapi/thunk/ppb_pdf_api.h"
using ppapi::thunk::PPB_PDFFont_API;
using ppapi::thunk::EnterResource;
namespace ppapi {
namespace proxy {
class PrivateFontFile : public Resource,
public PPB_PDFFont_API {
public:
PrivateFontFile(const HostResource& resource) : Resource(resource) {
}
virtual ~PrivateFontFile() {}
PPB_PDFFont_API* AsPPB_PDFFont_API() { return this; }
// Sees if we have a cache of the font table and returns a pointer to it.
// Returns NULL if we don't have it.
std::string* GetFontTable(uint32_t table) const;
std::string* AddFontTable(uint32_t table, const std::string& contents);
private:
typedef std::map<uint32_t, linked_ptr<std::string> > FontTableMap;
FontTableMap font_tables_;
DISALLOW_COPY_AND_ASSIGN(PrivateFontFile);
};
std::string* PrivateFontFile::GetFontTable(uint32_t table) const {
FontTableMap::const_iterator found = font_tables_.find(table);
if (found == font_tables_.end())
return NULL;
return found->second.get();
}
std::string* PrivateFontFile::AddFontTable(uint32_t table,
const std::string& contents) {
linked_ptr<std::string> heap_string(new std::string(contents));
font_tables_[table] = heap_string;
return heap_string.get();
}
namespace {
PP_Resource GetFontFileWithFallback(
PP_Instance instance,
const PP_FontDescription_Dev* description,
PP_PrivateFontCharset charset) {
PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(instance);
if (!dispatcher)
return 0;
SerializedFontDescription desc;
desc.SetFromPPFontDescription(dispatcher, *description, true);
HostResource result;
dispatcher->Send(new PpapiHostMsg_PPBPDF_GetFontFileWithFallback(
API_ID_PPB_PDF, instance, desc, charset, &result));
if (result.is_null())
return 0;
return (new PrivateFontFile(result))->GetReference();
}
bool GetFontTableForPrivateFontFile(PP_Resource font_file,
uint32_t table,
void* output,
uint32_t* output_length) {
EnterResource<PPB_PDFFont_API> enter(font_file, true);
if (enter.failed())
return false;
PrivateFontFile* object = static_cast<PrivateFontFile*>(enter.object());
PluginDispatcher* dispatcher = PluginDispatcher::GetForInstance(
object->pp_instance());
if (!dispatcher)
return false;
std::string* contents = object->GetFontTable(table);
if (!contents) {
std::string deserialized;
dispatcher->Send(new PpapiHostMsg_PPBPDF_GetFontTableForPrivateFontFile(
API_ID_PPB_PDF, object->host_resource(), table, &deserialized));
if (deserialized.empty())
return false;
contents = object->AddFontTable(table, deserialized);
}
*output_length = static_cast<uint32_t>(contents->size());
if (output)
memcpy(output, contents->c_str(), *output_length);
return true;
}
const PPB_PDF pdf_interface = {
NULL, // &GetLocalizedString,
NULL, // &GetResourceImage,
&GetFontFileWithFallback,
&GetFontTableForPrivateFontFile,
};
InterfaceProxy* CreatePDFProxy(Dispatcher* dispatcher) {
return new PPB_PDF_Proxy(dispatcher);
}
} // namespace
PPB_PDF_Proxy::PPB_PDF_Proxy(Dispatcher* dispatcher)
: InterfaceProxy(dispatcher),
ppb_pdf_impl_(NULL) {
if (!dispatcher->IsPlugin()) {
ppb_pdf_impl_ = static_cast<const PPB_PDF*>(
dispatcher->local_get_interface()(PPB_PDF_INTERFACE));
}
}
PPB_PDF_Proxy::~PPB_PDF_Proxy() {
}
// static
const InterfaceProxy::Info* PPB_PDF_Proxy::GetInfo() {
static const Info info = {
&pdf_interface,
PPB_PDF_INTERFACE,
API_ID_PPB_PDF,
true,
&CreatePDFProxy,
};
return &info;
}
bool PPB_PDF_Proxy::OnMessageReceived(const IPC::Message& msg) {
bool handled = true;
IPC_BEGIN_MESSAGE_MAP(PPB_PDF_Proxy, msg)
IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBPDF_GetFontFileWithFallback,
OnMsgGetFontFileWithFallback)
IPC_MESSAGE_HANDLER(PpapiHostMsg_PPBPDF_GetFontTableForPrivateFontFile,
OnMsgGetFontTableForPrivateFontFile)
IPC_MESSAGE_UNHANDLED(handled = false)
IPC_END_MESSAGE_MAP()
// TODO(brettw): handle bad messages!
return handled;
}
void PPB_PDF_Proxy::OnMsgGetFontFileWithFallback(
PP_Instance instance,
const SerializedFontDescription& in_desc,
int32_t charset,
HostResource* result) {
PP_FontDescription_Dev desc;
in_desc.SetToPPFontDescription(dispatcher(), &desc, false);
result->SetHostResource(instance,
ppb_pdf_impl_->GetFontFileWithFallback(
instance, &desc, static_cast<PP_PrivateFontCharset>(charset)));
}
void PPB_PDF_Proxy::OnMsgGetFontTableForPrivateFontFile(
const HostResource& font_file,
uint32_t table,
std::string* result) {
// TODO(brettw): It would be nice not to copy here. At least on Linux,
// we can map the font file into shared memory and read it that way.
uint32_t table_length = 0;
if (!ppb_pdf_impl_->GetFontTableForPrivateFontFile(
font_file.host_resource(), table, NULL, &table_length))
return;
result->resize(table_length);
ppb_pdf_impl_->GetFontTableForPrivateFontFile(font_file.host_resource(),
table, const_cast<char*>(result->c_str()), &table_length);
}
} // namespace proxy
} // namespace ppapi
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