Restored printing windows context for builds without preview.

printing/printing_context_win_unittest.cc

 // 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 "printing/printing_context_win.h"
 
+#include "base/bind.h"
+#include "base/message_loop/message_loop.h"
+#include "printing/backend/printing_info_win.h"
+#include "printing/backend/win_helper.h"
+#include "printing/print_settings.h"
+#include "printing/printing_context_system_dialog_win.h"
 #include "printing/printing_test.h"
-#include "printing/print_settings.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 namespace printing {
 
 // This test is automatically disabled if no printer is available.
 class PrintingContextTest : public PrintingTest<testing::Test>,
                             public PrintingContext::Delegate {
  public:
   void PrintSettingsCallback(PrintingContext::Result result) {
     result_ = result;
   }
 
   // PrintingContext::Delegate methods.
   virtual gfx::NativeView GetParentView() OVERRIDE { return NULL; }
   virtual std::string GetAppLocale() OVERRIDE { return std::string(); }
 
  protected:
   PrintingContext::Result result() const { return result_; }
 
  private:
   PrintingContext::Result result_;
 };
 
+class MockPrintingContextWin : public PrintingContextSytemDialogWin {
+ public:
+  MockPrintingContextWin(Delegate* delegate)
+      : PrintingContextSytemDialogWin(delegate) {}
+
+ protected:
+  // This is a fake PrintDlgEx implementation that sets the right fields in
+  // |lppd| to trigger a bug in older revisions of PrintingContext.
+  HRESULT ShowPrintDialog(PRINTDLGEX* lppd) OVERRIDE {
+    // The interesting bits:
+    // Pretend the user hit print
+    lppd->dwResultAction = PD_RESULT_PRINT;
+
+    // Pretend the page range is 1-5, but since lppd->Flags does not have
+    // PD_SELECTION set, this really shouldn't matter.
+    lppd->nPageRanges = 1;
+    lppd->lpPageRanges[0].nFromPage = 1;
+    lppd->lpPageRanges[0].nToPage = 5;
+
+    base::string16 printer_name = PrintingContextTest::GetDefaultPrinter();
+    ScopedPrinterHandle printer;
+    if (!printer.OpenPrinter(printer_name.c_str()))
+      return E_FAIL;
+
+    scoped_ptr<uint8[]> buffer;
+    const DEVMODE* dev_mode = NULL;
+    HRESULT result = S_OK;
+    lppd->hDC = NULL;
+    lppd->hDevMode = NULL;
+    lppd->hDevNames = NULL;
+
+    PrinterInfo2 info_2;
+    if (info_2.Init(printer)) {
+      dev_mode = info_2.get()->pDevMode;
+    }
+    if (!dev_mode) {
+      result = E_FAIL;
+      goto Cleanup;
+    }
+
+    lppd->hDC = CreateDC(L"WINSPOOL", printer_name.c_str(), NULL, dev_mode);
+    if (!lppd->hDC) {
+      result = E_FAIL;
+      goto Cleanup;
+    }
+
+    size_t dev_mode_size = dev_mode->dmSize + dev_mode->dmDriverExtra;
+    lppd->hDevMode = GlobalAlloc(GMEM_MOVEABLE, dev_mode_size);
+    if (!lppd->hDevMode) {
+      result = E_FAIL;
+      goto Cleanup;
+    }
+    void* dev_mode_ptr = GlobalLock(lppd->hDevMode);
+    if (!dev_mode_ptr) {
+      result = E_FAIL;
+      goto Cleanup;
+    }
+    memcpy(dev_mode_ptr, dev_mode, dev_mode_size);
+    GlobalUnlock(lppd->hDevMode);
+    dev_mode_ptr = NULL;
+
+    size_t driver_size =
+        2 + sizeof(wchar_t) * lstrlen(info_2.get()->pDriverName);
+    size_t printer_size =
+        2 + sizeof(wchar_t) * lstrlen(info_2.get()->pPrinterName);
+    size_t port_size = 2 + sizeof(wchar_t) * lstrlen(info_2.get()->pPortName);
+    size_t dev_names_size =
+        sizeof(DEVNAMES) + driver_size + printer_size + port_size;
+    lppd->hDevNames = GlobalAlloc(GHND, dev_names_size);
+    if (!lppd->hDevNames) {
+      result = E_FAIL;
+      goto Cleanup;
+    }
+    void* dev_names_ptr = GlobalLock(lppd->hDevNames);
+    if (!dev_names_ptr) {
+      result = E_FAIL;
+      goto Cleanup;
+    }
+    DEVNAMES* dev_names = reinterpret_cast<DEVNAMES*>(dev_names_ptr);
+    dev_names->wDefault = 1;
+    dev_names->wDriverOffset = sizeof(DEVNAMES) / sizeof(wchar_t);
+    memcpy(reinterpret_cast<uint8*>(dev_names_ptr) + dev_names->wDriverOffset,
+           info_2.get()->pDriverName,
+           driver_size);
+    dev_names->wDeviceOffset =
+        dev_names->wDriverOffset + driver_size / sizeof(wchar_t);
+    memcpy(reinterpret_cast<uint8*>(dev_names_ptr) + dev_names->wDeviceOffset,
+           info_2.get()->pPrinterName,
+           printer_size);
+    dev_names->wOutputOffset =
+        dev_names->wDeviceOffset + printer_size / sizeof(wchar_t);
+    memcpy(reinterpret_cast<uint8*>(dev_names_ptr) + dev_names->wOutputOffset,
+           info_2.get()->pPortName,
+           port_size);
+    GlobalUnlock(lppd->hDevNames);
+    dev_names_ptr = NULL;
+
+  Cleanup:
+    // Note: This section does proper deallocation/free of DC/global handles. We
+    //       did not use ScopedHGlobal or ScopedHandle because they did not
+    //       perform what we need.  Goto's are used based on Windows programming
+    //       idiom, to avoid deeply nested if's, and try-catch-finally is not
+    //       allowed in Chromium.
+    if (FAILED(result)) {
+      if (lppd->hDC) {
+        DeleteDC(lppd->hDC);
+      }
+      if (lppd->hDevMode) {
+        GlobalFree(lppd->hDevMode);
+      }
+      if (lppd->hDevNames) {
+        GlobalFree(lppd->hDevNames);
+      }
+    }
+    return result;
+  }
+};
+
+TEST_F(PrintingContextTest, PrintAll) {
+  base::MessageLoop message_loop;
+  if (IsTestCaseDisabled())
+    return;
+
+  MockPrintingContextWin context(this);
+  context.AskUserForSettings(
+      123,
+      false,
+      base::Bind(&PrintingContextTest::PrintSettingsCallback,
+                 base::Unretained(this)));
+  EXPECT_EQ(PrintingContext::OK, result());
+  PrintSettings settings = context.settings();
+  EXPECT_EQ(settings.ranges().size(), 0);
+}
+
 TEST_F(PrintingContextTest, Base) {
   if (IsTestCaseDisabled())
     return;
 
   PrintSettings settings;
   settings.set_device_name(GetDefaultPrinter());
   // Initialize it.
   scoped_ptr<PrintingContext> context(PrintingContext::Create(this));
   EXPECT_EQ(PrintingContext::OK, context->InitWithSettings(settings));
 
   // The print may lie to use and may not support world transformation.
   // Verify right now.
   XFORM random_matrix = { 1, 0.1f, 0, 1.5f, 0, 1 };
   EXPECT_TRUE(SetWorldTransform(context->context(), &random_matrix));
   EXPECT_TRUE(ModifyWorldTransform(context->context(), NULL, MWT_IDENTITY));
 }
 
 }  // namespace printing