gfx/thebes/PrintTargetWindows.cpp

   1 /* -*- Mode: C++; tab-width: 20; indent-tabs-mode: nil; c-basic-offset: 2 -*-
   2  * This Source Code Form is subject to the terms of the Mozilla Public
   3  * License, v. 2.0. If a copy of the MPL was not distributed with this
   4  * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
   5
   6 #include "PrintTargetWindows.h"
   7
   8 #include "cairo-win32.h"
   9 #include "mozilla/gfx/HelpersCairo.h"
  10 #include "nsCoord.h"
  11 #include "nsString.h"
  12
  13 namespace mozilla {
  14 namespace gfx {
  15
  16 PrintTargetWindows::PrintTargetWindows(cairo_surface_t* aCairoSurface,
  17                                        const IntSize& aSize, HDC aDC)
  18     : PrintTarget(aCairoSurface, aSize), mDC(aDC) {
  19   // TODO: At least add basic memory reporting.
  20   // 4 * mSize.width * mSize.height + sizeof(PrintTargetWindows) ?
  21 }
  22
  23 /* static */
  24 already_AddRefed<PrintTargetWindows> PrintTargetWindows::CreateOrNull(HDC aDC) {
  25   // Figure out the paper size, the actual surface size will be the printable
  26   // area which is likely smaller, but the size here is later used to create the
  27   // draw target where the full page size is needed.
  28   // Note: we only scale the printing using the LOGPIXELSY,
  29   // so we use that when calculating the surface width as well as the height.
  30   int32_t heightDPI = ::GetDeviceCaps(aDC, LOGPIXELSY);
  31   float width =
  32       (::GetDeviceCaps(aDC, PHYSICALWIDTH) * POINTS_PER_INCH_FLOAT) / heightDPI;
  33   float height =
  34       (::GetDeviceCaps(aDC, PHYSICALHEIGHT) * POINTS_PER_INCH_FLOAT) /
  35       heightDPI;
  36   IntSize size = IntSize::Truncate(width, height);
  37
  38   if (!Factory::CheckSurfaceSize(size)) {
  39     return nullptr;
  40   }
  41
  42   cairo_surface_t* surface = cairo_win32_printing_surface_create(aDC);
  43
  44   if (cairo_surface_status(surface)) {
  45     return nullptr;
  46   }
  47
  48   // The new object takes ownership of our surface reference.
  49   RefPtr<PrintTargetWindows> target =
  50       new PrintTargetWindows(surface, size, aDC);
  51
  52   return target.forget();
  53 }
  54
  55 nsresult PrintTargetWindows::BeginPrinting(const nsAString& aTitle,
  56                                            const nsAString& aPrintToFileName,
  57                                            int32_t aStartPage,
  58                                            int32_t aEndPage) {
  59   const uint32_t DOC_TITLE_LENGTH = MAX_PATH - 1;
  60
  61   DOCINFOW docinfo;
  62
  63   nsString titleStr(aTitle);
  64   if (titleStr.Length() > DOC_TITLE_LENGTH) {
  65     titleStr.SetLength(DOC_TITLE_LENGTH - 3);
  66     titleStr.AppendLiteral("...");
  67   }
  68
  69   nsString docName(aPrintToFileName);
  70   docinfo.cbSize = sizeof(docinfo);
  71   docinfo.lpszDocName =
  72       titleStr.Length() > 0 ? titleStr.get() : L"Mozilla Document";
  73   docinfo.lpszOutput = docName.Length() > 0 ? docName.get() : nullptr;
  74   docinfo.lpszDatatype = nullptr;
  75   docinfo.fwType = 0;
  76
  77   // If the user selected Microsoft Print to PDF or XPS Document Printer, then
  78   // the following StartDoc call will put up a dialog window to prompt the
  79   // user to provide the name and location of the file to be saved.  A zero or
  80   // negative return value indicates failure.  In that case we want to check
  81   // whether that is because the user hit Cancel, since we want to treat that
  82   // specially to avoid notifying the user that the print "failed" in that
  83   // case.
  84   // XXX We should perhaps introduce a new NS_ERROR_USER_CANCELLED errer.
  85   int result = ::StartDocW(mDC, &docinfo);
  86   if (result <= 0) {
  87     if (::GetLastError() == ERROR_CANCELLED) {
  88       return NS_ERROR_ABORT;
  89     }
  90     return NS_ERROR_FAILURE;
  91   }
  92   return NS_OK;
  93 }
  94
  95 nsresult PrintTargetWindows::EndPrinting() {
  96   int result = ::EndDoc(mDC);
  97   return (result <= 0) ? NS_ERROR_FAILURE : NS_OK;
  98 }
  99
 100 nsresult PrintTargetWindows::AbortPrinting() {
 101   PrintTarget::AbortPrinting();
 102   int result = ::AbortDoc(mDC);
 103   return (result <= 0) ? NS_ERROR_FAILURE : NS_OK;
 104 }
 105
 106 nsresult PrintTargetWindows::BeginPage(const IntSize& aSizeInPoints) {
 107   PrintTarget::BeginPage(aSizeInPoints);
 108   int result = ::StartPage(mDC);
 109   return (result <= 0) ? NS_ERROR_FAILURE : NS_OK;
 110 }
 111
 112 nsresult PrintTargetWindows::EndPage() {
 113   cairo_surface_show_page(mCairoSurface);
 114   PrintTarget::EndPage();
 115   int result = ::EndPage(mDC);
 116   return (result <= 0) ? NS_ERROR_FAILURE : NS_OK;
 117 }
 118
 119 }  // namespace gfx
 120 }  // namespace mozilla