1 files changed, 88 insertions, 0 deletions
diff --git a/layout/printing/nsPrintObject.h b/layout/printing/nsPrintObject.h
new file mode 100644
index 0000000000..4c79bbbf0e
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+++ b/layout/printing/nsPrintObject.h
@@ -0,0 +1,88 @@
+/* -*- 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/. */
+#ifndef nsPrintObject_h___
+#define nsPrintObject_h___
+
+#include "mozilla/Attributes.h"
+#include "mozilla/UniquePtr.h"
+
+// Interfaces
+#include "nsCOMPtr.h"
+#include "nsViewManager.h"
+#include "nsIDocShell.h"
+#include "nsIDocShellTreeOwner.h"
+
+class nsIContent;
+class nsPresContext;
+
+namespace mozilla {
+class PresShell;
+}  // namespace mozilla
+
+//---------------------------------------------------
+//-- nsPrintObject Class
+//---------------------------------------------------
+class nsPrintObject final {
+ public:
+  /**
+   * If aParent is nullptr (default), then this instance will be initialized as
+   * a "root" nsPrintObject.  Otherwise, this will be a "nested" nsPrintObject.
+   */
+  nsPrintObject(nsIDocShell& aDocShell, mozilla::dom::Document& aDoc,
+                nsPrintObject* aParent = nullptr);
+  ~nsPrintObject();
+
+  void DestroyPresentation();
+
+  /**
+   * Recursively sets all the PO items to be printed
+   * from the given item down into the tree
+   */
+  void EnablePrinting(bool aEnable);
+
+  /**
+   * Recursively sets all the PO items to be printed if they have a selection.
+   */
+  void EnablePrintingSelectionOnly();
+
+  bool PrintingIsEnabled() const { return mPrintingIsEnabled; }
+
+  bool HasSelection() const;
+
+  // Data Members
+  nsCOMPtr<nsIDocShell> mDocShell;
+  nsCOMPtr<nsIDocShellTreeOwner> mTreeOwner;
+  RefPtr<mozilla::dom::Document> mDocument;
+
+  RefPtr<nsPresContext> mPresContext;
+  RefPtr<mozilla::PresShell> mPresShell;
+  RefPtr<nsViewManager> mViewManager;
+
+  nsCOMPtr<nsIContent> mContent;
+
+  nsTArray<mozilla::UniquePtr<nsPrintObject>> mKids;
+  const nsPrintObject* mParent;  // This is a non-owning pointer.
+  bool mHasBeenPrinted = false;
+  bool mInvisible = false;  // Indicates PO is set to not visible by CSS
+
+  // The scale factor that sheets should be scaled by. This is either the
+  // explicit scale chosen by the user or else the shrink-to-fit scale factor
+  // if the user selects shrink-to-fit. Only set on the top-level nsPrintObject
+  // since this is only used by nsPageFrame (via nsPresContext::GetPageScale()).
+  float mZoomRatio = 1.0;
+
+  // If the user selects the shrink-to-fit option, the shrink-to-fit scale
+  // factor is calculated and stored here. Only set on the top-level
+  // nsPrintObject.
+  float mShrinkRatio = 1.0;
+
+ private:
+  nsPrintObject& operator=(const nsPrintObject& aOther) = delete;
+
+  bool mPrintingIsEnabled = false;
+};
+
+#endif /* nsPrintObject_h___ */