viewobjectcontact.cxx

Go to the documentation of this file.

/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/*
 * This file is part of the LibreOffice project.
 *
 * 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/.
 *
 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
 *   contributor license agreements. See the NOTICE file distributed
 *   with this work for additional information regarding copyright
 *   ownership. The ASF licenses this file to you under the Apache
 *   License, Version 2.0 (the "License"); you may not use this file
 *   except in compliance with the License. You may obtain a copy of
 *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
 */

#include <svx/sdr/contact/viewobjectcontact.hxx>
#include <svx/sdr/contact/viewcontact.hxx>
#include <svx/sdr/contact/objectcontact.hxx>
#include <svx/sdr/contact/displayinfo.hxx>
#include <svx/sdr/animation/animationstate.hxx>
#include <svx/sdr/contact/viewobjectcontactredirector.hxx>
#include <basegfx/color/bcolor.hxx>
#include <drawinglayer/primitive2d/modifiedcolorprimitive2d.hxx>
#include <drawinglayer/primitive2d/animatedprimitive2d.hxx>
#include <drawinglayer/processor2d/baseprocessor2d.hxx>
#include <svx/sdr/primitive2d/svx_primitivetypes2d.hxx>
#include <drawinglayer/primitive2d/transformprimitive2d.hxx>

using namespace com::sun::star;

namespace {

// animated extractor

// Necessary to filter a sequence of animated primitives from
// a sequence of primitives to find out if animated or not. The decision for
// what to decompose is hard-coded and only done for knowingly animated primitives
// to not decompose too deeply and unnecessarily. This implies that the list
// which is view-specific needs to be expanded by hand when new animated objects
// are added. This may eventually be changed to a dynamically configurable approach
// if necessary.
class AnimatedExtractingProcessor2D : public drawinglayer::processor2d::BaseProcessor2D
{
protected:
    // the found animated primitives
    drawinglayer::primitive2d::Primitive2DContainer  maPrimitive2DSequence;

    // text animation allowed?
    bool                                            mbTextAnimationAllowed : 1;

    // graphic animation allowed?
    bool                                            mbGraphicAnimationAllowed : 1;

    // as tooling, the process() implementation takes over API handling and calls this
    // virtual render method when the primitive implementation is BasePrimitive2D-based.
    virtual void processBasePrimitive2D(const drawinglayer::primitive2d::BasePrimitive2D& rCandidate) override;

public:
    AnimatedExtractingProcessor2D(
        const drawinglayer::geometry::ViewInformation2D& rViewInformation,
        bool bTextAnimationAllowed,
        bool bGraphicAnimationAllowed);

    // data access
    const drawinglayer::primitive2d::Primitive2DContainer& getPrimitive2DSequence() const { return maPrimitive2DSequence; }
};

AnimatedExtractingProcessor2D::AnimatedExtractingProcessor2D(
    const drawinglayer::geometry::ViewInformation2D& rViewInformation,
    bool bTextAnimationAllowed,
    bool bGraphicAnimationAllowed)
:   drawinglayer::processor2d::BaseProcessor2D(rViewInformation),
    maPrimitive2DSequence(),
    mbTextAnimationAllowed(bTextAnimationAllowed),
    mbGraphicAnimationAllowed(bGraphicAnimationAllowed)
{
}

void AnimatedExtractingProcessor2D::processBasePrimitive2D(const drawinglayer::primitive2d::BasePrimitive2D& rCandidate)
{
    // known implementation, access directly
    switch(rCandidate.getPrimitive2DID())
    {
        // add and accept animated primitives directly, no need to decompose
        case PRIMITIVE2D_ID_ANIMATEDSWITCHPRIMITIVE2D :
        case PRIMITIVE2D_ID_ANIMATEDBLINKPRIMITIVE2D :
        case PRIMITIVE2D_ID_ANIMATEDINTERPOLATEPRIMITIVE2D :
        {
            const drawinglayer::primitive2d::AnimatedSwitchPrimitive2D& rSwitchPrimitive = static_cast< const drawinglayer::primitive2d::AnimatedSwitchPrimitive2D& >(rCandidate);

            if((rSwitchPrimitive.isTextAnimation() && mbTextAnimationAllowed)
                || (rSwitchPrimitive.isGraphicAnimation() && mbGraphicAnimationAllowed))
            {
                const drawinglayer::primitive2d::Primitive2DReference xReference(const_cast< drawinglayer::primitive2d::BasePrimitive2D* >(&rCandidate));
                maPrimitive2DSequence.push_back(xReference);
            }
            break;
        }

        // decompose animated gifs where SdrGrafPrimitive2D produces a GraphicPrimitive2D
        // which then produces the animation infos (all when used/needed)
        case PRIMITIVE2D_ID_SDRGRAFPRIMITIVE2D :
        case PRIMITIVE2D_ID_GRAPHICPRIMITIVE2D :

        // decompose SdrObjects with evtl. animated text
        case PRIMITIVE2D_ID_SDRCAPTIONPRIMITIVE2D :
        case PRIMITIVE2D_ID_SDRCONNECTORPRIMITIVE2D :
        case PRIMITIVE2D_ID_SDRCUSTOMSHAPEPRIMITIVE2D :
        case PRIMITIVE2D_ID_SDRELLIPSEPRIMITIVE2D :
        case PRIMITIVE2D_ID_SDRELLIPSESEGMENTPRIMITIVE2D :
        case PRIMITIVE2D_ID_SDRMEASUREPRIMITIVE2D :
        case PRIMITIVE2D_ID_SDRPATHPRIMITIVE2D :
        case PRIMITIVE2D_ID_SDRRECTANGLEPRIMITIVE2D :

        // #121194# With Graphic as Bitmap FillStyle, also check
        // for primitives filled with animated graphics
        case PRIMITIVE2D_ID_POLYPOLYGONGRAPHICPRIMITIVE2D:
        case PRIMITIVE2D_ID_FILLGRAPHICPRIMITIVE2D:
        case PRIMITIVE2D_ID_TRANSFORMPRIMITIVE2D:

        // decompose evtl. animated text contained in MaskPrimitive2D
        // or group primitives
        case PRIMITIVE2D_ID_MASKPRIMITIVE2D :
        case PRIMITIVE2D_ID_GROUPPRIMITIVE2D :
        {
            process(rCandidate);
            break;
        }

        default :
        {
            // nothing to do for the rest
            break;
        }
    }
}

} // end of anonymous namespace

namespace sdr::contact {

ViewObjectContact::ViewObjectContact(ObjectContact& rObjectContact, ViewContact& rViewContact)
:   mrObjectContact(rObjectContact),
    mrViewContact(rViewContact),
    maObjectRange(),
    mxPrimitive2DSequence(),
    maGridOffset(0.0, 0.0),
    mbLazyInvalidate(false)
{
    // make the ViewContact remember me
    mrViewContact.AddViewObjectContact(*this);

    // make the ObjectContact remember me
    mrObjectContact.AddViewObjectContact(*this);
}

ViewObjectContact::~ViewObjectContact()
{
    // invalidate in view
    if(!maObjectRange.isEmpty())
    {
        GetObjectContact().InvalidatePartOfView(maObjectRange);
    }

    // delete PrimitiveAnimation
    mpPrimitiveAnimation.reset();

    // take care of remembered ObjectContact. Remove from
    // OC first. The VC removal (below) CAN trigger a StopGettingViewed()
    // which (depending of its implementation) may destroy other OCs. This
    // can trigger the deletion of the helper OC of a page visualising object
    // which IS the OC of this object. Eventually StopGettingViewed() needs
    // to get asynchron later
    GetObjectContact().RemoveViewObjectContact(*this);

    // take care of remembered ViewContact
    GetViewContact().RemoveViewObjectContact(*this);
}

const basegfx::B2DRange& ViewObjectContact::getObjectRange() const
{
    if(maObjectRange.isEmpty())
    {
        const drawinglayer::geometry::ViewInformation2D& rViewInfo2D = GetObjectContact().getViewInformation2D();
        basegfx::B2DRange aTempRange = GetViewContact().getRange(rViewInfo2D);
        if (!aTempRange.isEmpty())
        {
            const_cast< ViewObjectContact* >(this)->maObjectRange = aTempRange;
        }
        else
        {
            // if range is not computed (new or LazyInvalidate objects), force it
            const DisplayInfo aDisplayInfo;
            const drawinglayer::primitive2d::Primitive2DContainer xSequence(getPrimitive2DSequence(aDisplayInfo));

            if(!xSequence.empty())
            {
                const_cast< ViewObjectContact* >(this)->maObjectRange =
                    xSequence.getB2DRange(rViewInfo2D);
            }
        }
    }

    return maObjectRange;
}

void ViewObjectContact::ActionChanged()
{
    if(!mbLazyInvalidate)
    {
        // set local flag
        mbLazyInvalidate = true;

        // force ObjectRange
        getObjectRange();

        if(!maObjectRange.isEmpty())
        {
            // invalidate current valid range
            GetObjectContact().InvalidatePartOfView(maObjectRange);

            // reset ObjectRange, it needs to be recalculated
            maObjectRange.reset();
        }

        // register at OC for lazy invalidate
        GetObjectContact().setLazyInvalidate(*this);
    }
}

void ViewObjectContact::triggerLazyInvalidate()
{
    if(mbLazyInvalidate)
    {
        // reset flag
        mbLazyInvalidate = false;

        // force ObjectRange
        getObjectRange();

        if(!maObjectRange.isEmpty())
        {
            // invalidate current valid range
            GetObjectContact().InvalidatePartOfView(maObjectRange);
        }
    }
}

// Take some action when new objects are inserted
void ViewObjectContact::ActionChildInserted(ViewContact& rChild)
{
    // force creation of the new VOC and trigger it's refresh, so it
    // will take part in LazyInvalidate immediately
    rChild.GetViewObjectContact(GetObjectContact()).ActionChanged();

    // forward action to ObjectContact
    // const ViewObjectContact& rChildVOC = rChild.GetViewObjectContact(GetObjectContact());
    // GetObjectContact().InvalidatePartOfView(rChildVOC.getObjectRange());
}

void ViewObjectContact::checkForPrimitive2DAnimations()
{
    // remove old one
    mpPrimitiveAnimation.reset();

    // check for animated primitives
    if(!mxPrimitive2DSequence.empty())
    {
        const bool bTextAnimationAllowed(GetObjectContact().IsTextAnimationAllowed());
        const bool bGraphicAnimationAllowed(GetObjectContact().IsGraphicAnimationAllowed());

        if(bTextAnimationAllowed || bGraphicAnimationAllowed)
        {
            AnimatedExtractingProcessor2D aAnimatedExtractor(GetObjectContact().getViewInformation2D(),
                bTextAnimationAllowed, bGraphicAnimationAllowed);
            aAnimatedExtractor.process(mxPrimitive2DSequence);

            if(!aAnimatedExtractor.getPrimitive2DSequence().empty())
            {
                // derived primitiveList is animated, setup new PrimitiveAnimation
                mpPrimitiveAnimation.reset( new sdr::animation::PrimitiveAnimation(*this, aAnimatedExtractor.getPrimitive2DSequence()) );
            }
        }
    }
}

drawinglayer::primitive2d::Primitive2DContainer ViewObjectContact::createPrimitive2DSequence(const DisplayInfo& rDisplayInfo) const
{
    // get the view-independent Primitive from the viewContact
    drawinglayer::primitive2d::Primitive2DContainer xRetval(GetViewContact().getViewIndependentPrimitive2DContainer());

    if(!xRetval.empty())
    {
        // handle GluePoint
        if(!GetObjectContact().isOutputToPrinter() && GetObjectContact().AreGluePointsVisible())
        {
            const drawinglayer::primitive2d::Primitive2DContainer xGlue(GetViewContact().createGluePointPrimitive2DSequence());

            if(!xGlue.empty())
            {
                xRetval.append(xGlue);
            }
        }

        // handle ghosted
        if(isPrimitiveGhosted(rDisplayInfo))
        {
            const basegfx::BColor aRGBWhite(1.0, 1.0, 1.0);
            const basegfx::BColorModifierSharedPtr aBColorModifier =
                std::make_shared<basegfx::BColorModifier_interpolate>(
                    aRGBWhite,
                    0.5);
            const drawinglayer::primitive2d::Primitive2DReference xReference(
                new drawinglayer::primitive2d::ModifiedColorPrimitive2D(
                    xRetval,
                    aBColorModifier));

            xRetval = drawinglayer::primitive2d::Primitive2DContainer { xReference };
        }
    }

    return xRetval;
}

drawinglayer::primitive2d::Primitive2DContainer const & ViewObjectContact::getPrimitive2DSequence(const DisplayInfo& rDisplayInfo) const
{
    drawinglayer::primitive2d::Primitive2DContainer xNewPrimitiveSequence;

    // take care of redirectors and create new list
    ViewObjectContactRedirector* pRedirector = GetObjectContact().GetViewObjectContactRedirector();

    if(pRedirector)
    {
        xNewPrimitiveSequence = pRedirector->createRedirectedPrimitive2DSequence(*this, rDisplayInfo);
    }
    else
    {
        xNewPrimitiveSequence = createPrimitive2DSequence(rDisplayInfo);
    }

    // local up-to-date checks. New list different from local one?
    if(mxPrimitive2DSequence != xNewPrimitiveSequence)
    {
        // has changed, copy content
        const_cast< ViewObjectContact* >(this)->mxPrimitive2DSequence = xNewPrimitiveSequence;

        // check for animated stuff
        const_cast< ViewObjectContact* >(this)->checkForPrimitive2DAnimations();

        // always update object range when PrimitiveSequence changes
        const drawinglayer::geometry::ViewInformation2D& rViewInformation2D(GetObjectContact().getViewInformation2D());
        const_cast< ViewObjectContact* >(this)->maObjectRange = mxPrimitive2DSequence.getB2DRange(rViewInformation2D);

        // check and eventually embed to GridOffset transform primitive
        if(GetObjectContact().supportsGridOffsets())
        {
            const basegfx::B2DVector& rGridOffset(getGridOffset());

            if(0.0 != rGridOffset.getX() || 0.0 != rGridOffset.getY())
            {
                const basegfx::B2DHomMatrix aTranslateGridOffset(
                    basegfx::utils::createTranslateB2DHomMatrix(
                        rGridOffset));
                const drawinglayer::primitive2d::Primitive2DReference aEmbed(
                    new drawinglayer::primitive2d::TransformPrimitive2D(
                        aTranslateGridOffset,
                        mxPrimitive2DSequence));

                // Set values at local data. So for now, the mechanism is to reset some of the
                // defining things (mxPrimitive2DSequence, maGridOffset) and re-create the
                // buffered data (including maObjectRange). It *could* be changed to keep
                // the unmodified PrimitiveSequence and only update the GridOffset, but this
                // would require a 2nd instance of maObjectRange and mxPrimitive2DSequence. I
                // started doing so, but it just makes the code more complicated. For now,
                // just allow re-creation of the PrimitiveSequence (and removing buffered
                // decomposed content of it). May be optimized, though. OTOH it only happens
                // in calc which traditionally does not have a huge amount of DrawObjects anyways.
                const_cast< ViewObjectContact* >(this)->mxPrimitive2DSequence = drawinglayer::primitive2d::Primitive2DContainer { aEmbed };
                const_cast< ViewObjectContact* >(this)->maObjectRange.transform(aTranslateGridOffset);
            }
        }
    }

    // return current Primitive2DContainer
    return mxPrimitive2DSequence;
}

bool ViewObjectContact::isPrimitiveVisible(const DisplayInfo& /*rDisplayInfo*/) const
{
    // default: always visible
    return true;
}

bool ViewObjectContact::isPrimitiveGhosted(const DisplayInfo& rDisplayInfo) const
{
    // default: standard check
    return (GetObjectContact().DoVisualizeEnteredGroup() && !GetObjectContact().isOutputToPrinter() && rDisplayInfo.IsGhostedDrawModeActive());
}

drawinglayer::primitive2d::Primitive2DContainer ViewObjectContact::getPrimitive2DSequenceHierarchy(DisplayInfo& rDisplayInfo) const
{
    drawinglayer::primitive2d::Primitive2DContainer xRetval;

    // check model-view visibility
    if(isPrimitiveVisible(rDisplayInfo))
    {
        xRetval = getPrimitive2DSequence(rDisplayInfo);

        if(!xRetval.empty())
        {
            // get ranges
            const drawinglayer::geometry::ViewInformation2D& rViewInformation2D(GetObjectContact().getViewInformation2D());
            const basegfx::B2DRange aObjectRange(xRetval.getB2DRange(rViewInformation2D));
            const basegfx::B2DRange aViewRange(rViewInformation2D.getViewport());

            // check geometrical visibility
            bool bVisible = aViewRange.isEmpty() || aViewRange.overlaps(aObjectRange);
            if(!bVisible)
            {
                // not visible, release
                xRetval.clear();
            }
        }
    }

    return xRetval;
}

drawinglayer::primitive2d::Primitive2DContainer ViewObjectContact::getPrimitive2DSequenceSubHierarchy(DisplayInfo& rDisplayInfo) const
{
    const sal_uInt32 nSubHierarchyCount(GetViewContact().GetObjectCount());
    drawinglayer::primitive2d::Primitive2DContainer xSeqRetval;

    for(sal_uInt32 a(0); a < nSubHierarchyCount; a++)
    {
        const ViewObjectContact& rCandidate(GetViewContact().GetViewContact(a).GetViewObjectContact(GetObjectContact()));

        xSeqRetval.append(rCandidate.getPrimitive2DSequenceHierarchy(rDisplayInfo));
    }

    return xSeqRetval;
}

// Support getting a GridOffset per object and view for non-linear ViewToDevice
// transformation (calc). On-demand created by delegating to the ObjectContact
// (->View) that has then all needed information
const basegfx::B2DVector& ViewObjectContact::getGridOffset() const
{
    if(0.0 == maGridOffset.getX() && 0.0 == maGridOffset.getY() && GetObjectContact().supportsGridOffsets())
    {
        // create on-demand
        GetObjectContact().calculateGridOffsetForViewOjectContact(const_cast<ViewObjectContact*>(this)->maGridOffset, *this);
    }

    return maGridOffset;
}

void ViewObjectContact::resetGridOffset()
{
    // reset buffered GridOffset itself
    maGridOffset.setX(0.0);
    maGridOffset.setY(0.0);

    // also reset sequence to get a re-calculation when GridOffset changes
    mxPrimitive2DSequence.clear();
}

}

/* vim:set shiftwidth=4 softtabstop=4 expandtab: */