forked from mirrors/gecko-dev
84688dc421
The intention is to allow PrintedSheetFrame::Reflow to access the page style prior to reflowing its child so that it can decide whether to apply page style to the sheet (in the case of one page-per-sheet). This will happen in a subsequent bug. Differential Revision: https://phabricator.services.mozilla.com/D173773
71 lines
2.4 KiB
C++
71 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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/* Rendering object for a printed or print-previewed sheet of paper */
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#ifndef LAYOUT_GENERIC_PRINTEDSHEETFRAME_H_
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#define LAYOUT_GENERIC_PRINTEDSHEETFRAME_H_
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#include "nsContainerFrame.h"
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#include "nsHTMLParts.h"
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class nsSharedPageData;
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namespace mozilla {
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class PrintedSheetFrame final : public nsContainerFrame {
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public:
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NS_DECL_QUERYFRAME
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NS_DECL_FRAMEARENA_HELPERS(PrintedSheetFrame)
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friend PrintedSheetFrame* ::NS_NewPrintedSheetFrame(
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mozilla::PresShell* aPresShell, ComputedStyle* aStyle);
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void SetSharedPageData(nsSharedPageData* aPD) { mPD = aPD; }
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// Invokes MoveOverflowToChildList.
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// This is intended for use by callers that need to be able to get our first/
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// only nsPageFrame from our child list to examine its computed style just
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// **prior** to us being reflowed. (If our first nsPageFrame will come from
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// our prev-in-flow, we won't otherwise take ownership of it until we are
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// reflowed.)
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void ClaimPageFrameFromPrevInFlow();
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// nsIFrame overrides
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void Reflow(nsPresContext* aPresContext, ReflowOutput& aReflowOutput,
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const ReflowInput& aReflowInput,
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nsReflowStatus& aStatus) override;
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void BuildDisplayList(nsDisplayListBuilder* aBuilder,
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const nsDisplayListSet& aLists) override;
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#ifdef DEBUG_FRAME_DUMP
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nsresult GetFrameName(nsAString& aResult) const override;
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#endif
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uint32_t GetNumPages() const { return mNumPages; }
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private:
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// Private construtor & destructor, to avoid accidental (non-FrameArena)
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// instantiation/deletion:
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PrintedSheetFrame(ComputedStyle* aStyle, nsPresContext* aPresContext)
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: nsContainerFrame(aStyle, aPresContext, kClassID) {}
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~PrintedSheetFrame() = default;
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// Helper function to populate some pages-per-sheet metrics in our
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// nsSharedPageData.
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void ComputePagesPerSheetOriginAndScale();
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// Note: this will be set before reflow, and it's strongly owned by our
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// nsPageSequenceFrame, which outlives us.
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nsSharedPageData* mPD = nullptr;
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// The number of visible pages in this sheet.
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uint32_t mNumPages = 0;
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};
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} // namespace mozilla
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#endif /* LAYOUT_GENERIC_PRINTEDSHEETFRAME_H_ */
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