office-gobmx/include/drawinglayer/primitive2d/pagepreviewprimitive2d.hxx
Noel Grandin 3b83c6ac80 make BufferedDecompositionPrimitive2D store a Primitive2DReference..
.. instead of a Primitive2DContainer.

The container very frequently contains only a single item, since
the decomposition method often sticks only a single top-level node
in there, so it turns out to be a net loss overall, memory
consumption-wise.

Also, if we return a single Primitive2DReference from
a BufferedDecomposition, that maximises the sharing of
data between the BufferedDecomposition objects at the
bottom of the decomposed tree, and objects higher up.

Change-Id: Iaf272e60e2997299cc35a1bd209c51b6b79e9a8b
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/162976
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
2024-02-12 11:36:05 +01:00

90 lines
4 KiB
C++

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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* This file incorporates work covered by the following license notice:
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*/
#pragma once
#include <drawinglayer/drawinglayerdllapi.h>
#include <drawinglayer/primitive2d/BufferedDecompositionPrimitive2D.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
namespace com::sun::star::drawing { class XDrawPage; }
namespace drawinglayer::primitive2d
{
/** PagePreviewPrimitive2D class
This primitive is needed to have the correct XDrawPage as ViewInformation for decomposing
the page contents (given as PageContent here) if these contain e.g.
view-dependent (in this case XDrawPage-dependent) text fields like PageNumber. If You want
those primitives to be visualized correctly, Your renderer needs to locally correct its
ViewInformation2D to reference the new XDrawPage.
*/
class DRAWINGLAYER_DLLPUBLIC PagePreviewPrimitive2D final : public BufferedDecompositionPrimitive2D
{
private:
/** the XDrawPage visualized by this primitive. When we go forward with primitives
this will not only be used by the renderers to provide the correct decompose
graphic attribute context, but also to completely create the page's sub-content.
*/
const css::uno::Reference< css::drawing::XDrawPage > mxDrawPage;
/// the PageContent
Primitive2DContainer maPageContent;
/// the own geometry
basegfx::B2DHomMatrix maTransform;
/// content width and height
double mfContentWidth;
double mfContentHeight;
/// local decomposition. Implementation will just return children
virtual Primitive2DReference create2DDecomposition(const geometry::ViewInformation2D& rViewInformation) const override;
public:
/// constructor
PagePreviewPrimitive2D(
css::uno::Reference< css::drawing::XDrawPage > xDrawPage,
basegfx::B2DHomMatrix aTransform,
double fContentWidth,
double fContentHeight,
Primitive2DContainer&& rPageContent);
/// data read access
const css::uno::Reference< css::drawing::XDrawPage >& getXDrawPage() const { return mxDrawPage; }
const Primitive2DContainer& getPageContent() const { return maPageContent; }
const basegfx::B2DHomMatrix& getTransform() const { return maTransform; }
double getContentWidth() const { return mfContentWidth; }
double getContentHeight() const { return mfContentHeight; }
/// compare operator
virtual bool operator==(const BasePrimitive2D& rPrimitive) const override;
/// own getB2DRange
virtual basegfx::B2DRange getB2DRange(const geometry::ViewInformation2D& rViewInformation) const override;
/// provide unique ID
virtual sal_uInt32 getPrimitive2DID() const override;
};
} // end of namespace drawinglayer::primitive2d
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */