Bug 1399787 - Part 7. Have PrintTargetEMF launch the PDFium process. r=jwatt

MozReview-Commit-ID: CVfB81ifV2p

--HG--
extra : rebase_source : 88725db5962ce59282fc3df298f3224446c9e086

gfx/thebes/PrintTargetEMF.cpp

@@ -6,6 +6,7 @@
 #include "PrintTargetEMF.h"
 #include "nsAnonymousTemporaryFile.h"
 #include "nsIFile.h"
+#include "mozilla/widget/PDFiumProcessParent.h"
 
 using mozilla::gfx::DrawTarget;
 
@@ -18,6 +19,13 @@ PrintTargetEMF::PrintTargetEMF(HDC aDC, const IntSize& aSize)
 {
 }
 
+PrintTargetEMF::~PrintTargetEMF()
+{
+  if (mPDFiumProcess) {
+    mPDFiumProcess->Delete();
+  }
+}
+
 /* static */ already_AddRefed<PrintTargetEMF>
 PrintTargetEMF::CreateOrNull(HDC aDC, const IntSize& aSizeInPoints)
 {
@@ -51,6 +59,9 @@ PrintTargetEMF::BeginPrinting(const nsAString& aTitle,
 
   ::StartDocW(mPrinterDC, &docinfo);
 
+  mPDFiumProcess = new PDFiumProcessParent();
+  NS_ENSURE_TRUE(mPDFiumProcess->Launch(), NS_ERROR_FAILURE);
+
   return NS_OK;
 }
 

gfx/thebes/PrintTargetEMF.h

@@ -11,6 +11,12 @@
 /* include windows.h for the HDC definitions that we need. */
 #include <windows.h>
 
+namespace mozilla {
+namespace widget {
+  class PDFiumProcessParent;
+}
+}
+
 namespace mozilla {
 namespace gfx {
 
@@ -26,6 +32,7 @@ class PrintTargetEMF final : public mozilla::gfx::PrintTarget
 {
 public:
   typedef gfx::IntSize IntSize;
+  typedef mozilla::widget::PDFiumProcessParent PDFiumProcessParent;
 
   static already_AddRefed<PrintTargetEMF>
   CreateOrNull(HDC aDC, const IntSize& aSizeInPoints);
@@ -48,11 +55,13 @@ public:
 
 private:
   PrintTargetEMF(HDC aDC, const IntSize& aSize);
+  ~PrintTargetEMF() override;
 
   nsString mTitle;
   RefPtr<PrintTargetSkPDF> mTargetForCurrentPage;
   nsCOMPtr<nsIFile>        mPDFFileForOnePage;
   RefPtr<PrintTargetSkPDF> mRefTarget;
+  PDFiumProcessParent*     mPDFiumProcess;
   HDC mPrinterDC;
 };
 

widget/windows/moz.build

@@ -27,6 +27,7 @@ EXPORTS.mozilla.widget += [
     'PDFiumEngineShim.h',
     'PDFiumParent.h',
     'PDFiumProcessChild.h',
+    'PDFiumProcessParent.h',
     'PDFViaEMFPrintHelper.h',
     'WinCompositorWidget.h',
     'WinMessages.h',