Wrapers for PRINTER_INFO_* and DRIVER_INFO_*.

printing/backend/win_helper.cc

 // Copyright (c) 2012 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 "printing/backend/win_helper.h"
 
 #include <algorithm>
 
 #include "base/file_path.h"
 #include "base/file_version_info.h"
 #include "base/logging.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/utf_string_conversions.h"
 #include "printing/backend/print_backend.h"
 #include "printing/backend/print_backend_consts.h"
+#include "printing/backend/printing_info_win.h"
 
 namespace {
+
 typedef HRESULT (WINAPI* PTOpenProviderProc)(PCWSTR printer_name,
                                              DWORD version,
                                              HPTPROVIDER* provider);
+
 typedef HRESULT (WINAPI* PTGetPrintCapabilitiesProc)(HPTPROVIDER provider,
                                                      IStream* print_ticket,
                                                      IStream* capabilities,
                                                      BSTR* error_message);
+
 typedef HRESULT (WINAPI* PTConvertDevModeToPrintTicketProc)(
     HPTPROVIDER provider,
     ULONG devmode_size_in_bytes,
     PDEVMODE devmode,
     EPrintTicketScope scope,
     IStream* print_ticket);
+
 typedef HRESULT (WINAPI* PTConvertPrintTicketToDevModeProc)(
     HPTPROVIDER provider,
     IStream* print_ticket,
     EDefaultDevmodeType base_devmode_type,
     EPrintTicketScope scope,
     ULONG* devmode_byte_count,
     PDEVMODE* devmode,
     BSTR* error_message);
+
 typedef HRESULT (WINAPI* PTMergeAndValidatePrintTicketProc)(
     HPTPROVIDER provider,
     IStream* base_ticket,
     IStream* delta_ticket,
     EPrintTicketScope scope,
     IStream* result_ticket,
     BSTR* error_message);
+
 typedef HRESULT (WINAPI* PTReleaseMemoryProc)(PVOID buffer);
+
 typedef HRESULT (WINAPI* PTCloseProviderProc)(HPTPROVIDER provider);
+
 typedef HRESULT (WINAPI* StartXpsPrintJobProc)(
     const LPCWSTR printer_name,
     const LPCWSTR job_name,
     const LPCWSTR output_file_name,
     HANDLE progress_event,
     HANDLE completion_event,
     UINT8* printable_pages_on,
     UINT32 printable_pages_on_count,
     IXpsPrintJob** xps_print_job,
     IXpsPrintJobStream** document_stream,
     IXpsPrintJobStream** print_ticket_stream);
 
 PTOpenProviderProc g_open_provider_proc = NULL;
 PTGetPrintCapabilitiesProc g_get_print_capabilities_proc = NULL;
 PTConvertDevModeToPrintTicketProc g_convert_devmode_to_print_ticket_proc = NULL;
 PTConvertPrintTicketToDevModeProc g_convert_print_ticket_to_devmode_proc = NULL;
 PTMergeAndValidatePrintTicketProc g_merge_and_validate_print_ticket_proc = NULL;
 PTReleaseMemoryProc g_release_memory_proc = NULL;
 PTCloseProviderProc g_close_provider_proc = NULL;
 StartXpsPrintJobProc g_start_xps_print_job_proc = NULL;
 
-// Returns pointer to structure allocated in |buffer|. So pointer is only valide
-// until |buffer| is destroyed.
-const PRINTER_INFO_2* GetPrinterInfo2(HANDLE printer,
-                                      scoped_array<BYTE>* buffer) {
-  DCHECK(printer);
-  DCHECK(buffer);
-  DWORD bytes_needed = 0;
-  const DWORD kLevel = 2;
-  ::GetPrinter(printer, kLevel, NULL, 0, &bytes_needed);
-  if (!bytes_needed)
-    return NULL;
-  buffer->reset(new BYTE[bytes_needed]);
-  if (!buffer->get())
-    return NULL;
-  if (!::GetPrinter(printer, kLevel, buffer->get(), bytes_needed,
-                    &bytes_needed)) {
-    return NULL;
-  }
-  return reinterpret_cast<const PRINTER_INFO_2*>(buffer->get());
-}
+}  // namespace
 
-// Returns pointer to structure allocated in |buffer|. So pointer is only valide
-// until |buffer| is destroyed.
-const DRIVER_INFO_6* GetDriverInfo6(HANDLE printer,
-                                    scoped_array<BYTE>* buffer) {
-  DCHECK(printer);
-  DCHECK(buffer);
-  DWORD bytes_needed = 0;
-  const DWORD kLevel = 6;
-  ::GetPrinterDriver(printer, NULL, kLevel, NULL, 0, &bytes_needed);
-  if (!bytes_needed)
-    return NULL;
-  buffer->reset(new BYTE[bytes_needed]);
-  if (!buffer->get())
-    return NULL;
-  if (!::GetPrinterDriver(printer, NULL, kLevel, buffer->get(), bytes_needed,
-                          &bytes_needed)) {
-    return NULL;
-  }
-  return reinterpret_cast<const DRIVER_INFO_6*>(buffer->get());
-}
-
-}  // namespace
 
 namespace printing {
 
 bool XPSModule::Init() {
   static bool initialized = InitImpl();
   return initialized;
 }
 
 bool XPSModule::InitImpl() {
   HMODULE prntvpt_module = LoadLibrary(L"prntvpt.dll");
@@ skipping 188 matching lines @@
                                     document_stream,
                                     print_ticket_stream);
 }
 
 bool InitBasicPrinterInfo(HANDLE printer, PrinterBasicInfo* printer_info) {
   DCHECK(printer);
   DCHECK(printer_info);
   if (!printer)
     return false;
 
-  scoped_array<BYTE> printer_info_buffer;
-  const PRINTER_INFO_2* info2 = GetPrinterInfo2(printer, &printer_info_buffer);
+  PrinterInfo2 info_2;
+  if (!info_2.Init(printer))
+    return false;
 
-  if (!info2)
-    return false;
-  printer_info->printer_name = WideToUTF8(info2->pPrinterName);
-  if (info2->pComment)
-    printer_info->printer_description =
-        WideToUTF8(info2->pComment);
-  if (info2->pLocation)
+  printer_info->printer_name = WideToUTF8(info_2.get()->pPrinterName);
+  if (info_2.get()->pComment)
+    printer_info->printer_description = WideToUTF8(info_2.get()->pComment);
+  if (info_2.get()->pLocation)
     printer_info->options[kLocationTagName] =
-        WideToUTF8(info2->pLocation);
-  if (info2->pDriverName)
+        WideToUTF8(info_2.get()->pLocation);
+  if (info_2.get()->pDriverName)
     printer_info->options[kDriverNameTagName] =
-        WideToUTF8(info2->pDriverName);
-  printer_info->printer_status = info2->Status;
+        WideToUTF8(info_2.get()->pDriverName);
+  printer_info->printer_status = info_2.get()->Status;
 
   std::string driver_info = GetDriverInfo(printer);
   if (!driver_info.empty())
     printer_info->options[kDriverInfoTagName] = driver_info;
   return true;
 }
 
 std::string GetDriverInfo(HANDLE printer) {
   DCHECK(printer);
   std::string driver_info;
 
   if (!printer)
     return driver_info;
 
-  scoped_array<BYTE> driver_info_buffer;
-  const DRIVER_INFO_6* driver = GetDriverInfo6(printer, &driver_info_buffer);
-  if (!driver)
+  DriverInfo6 info_6;
+  if (!info_6.Init(printer))
     return driver_info;
 
   std::string info[4];
-  if (driver->pName)
-    info[0] = WideToUTF8(driver->pName);
+  if (info_6.get()->pName)
+    info[0] = WideToUTF8(info_6.get()->pName);
 
-  if (driver->pDriverPath) {
+  if (info_6.get()->pDriverPath) {
     scoped_ptr<FileVersionInfo> version_info(
         FileVersionInfo::CreateFileVersionInfo(
-            FilePath(driver->pDriverPath)));
+            FilePath(info_6.get()->pDriverPath)));
     if (version_info.get()) {
       info[1] = WideToUTF8(version_info->file_version());
       info[2] = WideToUTF8(version_info->product_name());
       info[3] = WideToUTF8(version_info->product_version());
     }
   }
 
   for (size_t i = 0; i < arraysize(info); ++i) {
     std::replace(info[i].begin(), info[i].end(), ';', ',');
     driver_info.append(info[i]);
     if (i < arraysize(info) - 1)
       driver_info.append(";");
   }
   return driver_info;
 }
 
 }  // namespace printing