tor-browser

The Tor Browser
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nsPageContentFrame.h (2440B)

      1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
      2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */
      3 /* This Source Code Form is subject to the terms of the Mozilla Public
      4 * License, v. 2.0. If a copy of the MPL was not distributed with this
      5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
      6 #ifndef nsPageContentFrame_h___
      7 #define nsPageContentFrame_h___
      8 
      9 #include "mozilla/ViewportFrame.h"
     10 
     11 class nsPageFrame;
     12 class nsSharedPageData;
     13 
     14 namespace mozilla {
     15 class PresShell;
     16 }  // namespace mozilla
     17 
     18 // Page content frame class. Represents a page's content, in paginated mode.
     19 class nsPageContentFrame final : public mozilla::ViewportFrame {
     20 public:
     21  NS_DECL_FRAMEARENA_HELPERS(nsPageContentFrame)
     22 
     23  friend nsPageContentFrame* NS_NewPageContentFrame(
     24      mozilla::PresShell* aPresShell, ComputedStyle* aStyle,
     25      already_AddRefed<const nsAtom> aPageName);
     26  friend class nsPageFrame;
     27 
     28  // nsIFrame
     29  void Reflow(nsPresContext* aPresContext, ReflowOutput& aReflowOutput,
     30              const ReflowInput& aReflowInput,
     31              nsReflowStatus& aStatus) override;
     32 
     33  const nsAtom* GetPageName() const { return mPageName; }
     34 
     35  void SetSharedPageData(nsSharedPageData* aPD) { mPD = aPD; }
     36 
     37  ComputeTransformFunction GetTransformGetter() const override;
     38  void BuildDisplayList(nsDisplayListBuilder*,
     39                        const nsDisplayListSet&) override;
     40 
     41  /**
     42   * Return our canvas frame.
     43   */
     44  void AppendDirectlyOwnedAnonBoxes(nsTArray<OwnedAnonBox>& aResult) override;
     45 
     46  void EnsurePageName();
     47 
     48 #ifdef DEBUG_FRAME_DUMP
     49  // Debugging
     50  nsresult GetFrameName(nsAString& aResult) const override;
     51  void ExtraContainerFrameInfo(nsACString& aTo,
     52                               bool aListOnlyDeterministic) const override;
     53 #endif
     54 
     55 protected:
     56  explicit nsPageContentFrame(ComputedStyle* aStyle,
     57                              nsPresContext* aPresContext,
     58                              already_AddRefed<const nsAtom> aPageName)
     59      : ViewportFrame(aStyle, aPresContext, kClassID), mPageName(aPageName) {}
     60 
     61  RefPtr<const nsAtom> mPageName;
     62 
     63  // Note: this will be set before reflow, and it's strongly owned by our
     64  // nsPageSequenceFrame, which outlives us.
     65  nsSharedPageData* mPD = nullptr;
     66 
     67  // The combined InkOverflow from the previous and current page that does not
     68  // yet have space allocated for it.
     69  nscoord mRemainingOverflow = 0;
     70 };
     71 
     72 #endif /* nsPageContentFrame_h___ */