1 files changed, 93 insertions, 0 deletions
diff --git a/layout/printing/nsPrintObject.cpp b/layout/printing/nsPrintObject.cpp
new file mode 100644
index 0000000000..6bd49ca50d
--- /dev/null
+++ b/layout/printing/nsPrintObject.cpp
@@ -0,0 +1,93 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsPrintObject.h"
+
+#include "nsIContentViewer.h"
+#include "nsContentUtils.h"  // for nsAutoScriptBlocker
+#include "nsIInterfaceRequestorUtils.h"
+#include "nsPIDOMWindow.h"
+#include "nsPresContext.h"
+#include "nsGkAtoms.h"
+#include "nsComponentManagerUtils.h"
+#include "nsIBaseWindow.h"
+#include "nsDocShell.h"
+
+#include "mozilla/PresShell.h"
+#include "mozilla/dom/BrowsingContext.h"
+#include "mozilla/dom/Document.h"
+#include "mozilla/dom/Element.h"
+
+using namespace mozilla;
+using mozilla::dom::BrowsingContext;
+using mozilla::dom::Document;
+using mozilla::dom::Element;
+using mozilla::dom::Selection;
+
+//---------------------------------------------------
+//-- nsPrintObject Class Impl
+//---------------------------------------------------
+nsPrintObject::nsPrintObject(nsIDocShell& aDocShell, Document& aDoc,
+                             nsPrintObject* aParent)
+    : mDocShell(&aDocShell), mDocument(&aDoc), mParent(aParent) {
+  MOZ_COUNT_CTOR(nsPrintObject);
+  MOZ_ASSERT(aDoc.IsStaticDocument());
+
+  if (!aParent) {
+    // We are a root nsPrintObject.
+    // Ensure the document has no presentation.
+    DestroyPresentation();
+  } else {
+    // We are a nested nsPrintObject.
+    nsCOMPtr<nsPIDOMWindowOuter> window = aDoc.GetWindow();
+    mContent = window->GetFrameElementInternal();
+  }
+}
+
+nsPrintObject::~nsPrintObject() {
+  MOZ_COUNT_DTOR(nsPrintObject);
+
+  DestroyPresentation();
+  mDocShell = nullptr;
+  mTreeOwner = nullptr;  // mTreeOwner must be released after mDocShell;
+}
+
+//------------------------------------------------------------------
+// Resets PO by destroying the presentation
+void nsPrintObject::DestroyPresentation() {
+  if (mDocument) {
+    if (RefPtr<PresShell> ps = mDocument->GetPresShell()) {
+      MOZ_DIAGNOSTIC_ASSERT(!mPresShell || ps == mPresShell);
+      mPresShell = nullptr;
+      nsAutoScriptBlocker scriptBlocker;
+      ps->EndObservingDocument();
+      ps->Destroy();
+    }
+  }
+  mPresShell = nullptr;
+  mPresContext = nullptr;
+  mViewManager = nullptr;
+}
+
+void nsPrintObject::EnablePrinting(bool aEnable) {
+  mPrintingIsEnabled = aEnable;
+
+  for (const UniquePtr<nsPrintObject>& kid : mKids) {
+    kid->EnablePrinting(aEnable);
+  }
+}
+
+bool nsPrintObject::HasSelection() const {
+  return mDocument && mDocument->GetProperty(nsGkAtoms::printselectionranges);
+}
+
+void nsPrintObject::EnablePrintingSelectionOnly() {
+  mPrintingIsEnabled = HasSelection();
+
+  for (const UniquePtr<nsPrintObject>& kid : mKids) {
+    kid->EnablePrintingSelectionOnly();
+  }
+}