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/* -*- 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 <sal/config.h>
#include <controller/SlsVisibleAreaManager.hxx>
#include <controller/SlideSorterController.hxx>
#include <controller/SlsAnimationFunction.hxx>
#include <controller/SlsScrollBarManager.hxx>
#include <controller/SlsCurrentSlideManager.hxx>
#include <Window.hxx>
#include <SlideSorter.hxx>
#include <view/SlideSorterView.hxx>
namespace sd::slidesorter::controller {
namespace {
class VisibleAreaScroller
{
public:
VisibleAreaScroller (
SlideSorter& rSlideSorter,
const Point& rStart,
const Point& rEnd);
void operator() (const double nValue);
private:
SlideSorter& mrSlideSorter;
Point maStart;
const Point maEnd;
const ::std::function<double (double)> maAccelerationFunction;
};
} // end of anonymous namespace
VisibleAreaManager::VisibleAreaManager (SlideSorter& rSlideSorter)
: mrSlideSorter(rSlideSorter),
mbIsCurrentSlideTrackingActive(true),
mnDisableCount(0)
{
}
VisibleAreaManager::~VisibleAreaManager()
{
}
void VisibleAreaManager::ActivateCurrentSlideTracking()
{
mbIsCurrentSlideTrackingActive = true;
}
void VisibleAreaManager::DeactivateCurrentSlideTracking()
{
mbIsCurrentSlideTrackingActive = false;
}
void VisibleAreaManager::RequestVisible (
const model::SharedPageDescriptor& rpDescriptor,
const bool bForce)
{
if (!rpDescriptor)
return;
if (mnDisableCount == 0)
{
maVisibleRequests.push_back(
mrSlideSorter.GetView().GetLayouter().GetPageObjectBox(
rpDescriptor->GetPageIndex(),
true));
}
if (bForce && ! mbIsCurrentSlideTrackingActive)
ActivateCurrentSlideTracking();
MakeVisible();
}
void VisibleAreaManager::RequestCurrentSlideVisible()
{
if (mbIsCurrentSlideTrackingActive && mnDisableCount==0)
RequestVisible(
mrSlideSorter.GetController().GetCurrentSlideManager()->GetCurrentSlide());
}
void VisibleAreaManager::MakeVisible()
{
if (maVisibleRequests.empty())
return;
sd::Window *pWindow (mrSlideSorter.GetContentWindow().get());
if ( ! pWindow)
return;
const Point aCurrentTopLeft (pWindow->PixelToLogic(Point(0,0)));
const ::std::optional<Point> aNewVisibleTopLeft (GetRequestedTopLeft());
maVisibleRequests.clear();
if ( ! aNewVisibleTopLeft)
return;
maRequestedVisibleTopLeft = *aNewVisibleTopLeft;
VisibleAreaScroller aAnimation(
mrSlideSorter,
aCurrentTopLeft,
maRequestedVisibleTopLeft);
// Execute the animation at its final value.
aAnimation(1.0);
}
::std::optional<Point> VisibleAreaManager::GetRequestedTopLeft() const
{
sd::Window *pWindow (mrSlideSorter.GetContentWindow().get());
if ( ! pWindow)
return ::std::optional<Point>();
// Get the currently visible area and the model area.
const ::tools::Rectangle aVisibleArea (pWindow->PixelToLogic(
::tools::Rectangle(
Point(0,0),
pWindow->GetOutputSizePixel())));
const ::tools::Rectangle aModelArea (mrSlideSorter.GetView().GetModelArea());
sal_Int32 nVisibleTop (aVisibleArea.Top());
const sal_Int32 nVisibleWidth (aVisibleArea.GetWidth());
sal_Int32 nVisibleLeft (aVisibleArea.Left());
const sal_Int32 nVisibleHeight (aVisibleArea.GetHeight());
// Find the longest run of boxes whose union fits into the visible area.
for (const auto& rBox : maVisibleRequests)
{
if (nVisibleTop+nVisibleHeight <= rBox.Bottom())
nVisibleTop = rBox.Bottom()-nVisibleHeight;
if (nVisibleTop > rBox.Top())
nVisibleTop = rBox.Top();
if (nVisibleLeft+nVisibleWidth <= rBox.Right())
nVisibleLeft = rBox.Right()-nVisibleWidth;
if (nVisibleLeft > rBox.Left())
nVisibleLeft = rBox.Left();
// Make sure the visible area does not move outside the model area.
if (nVisibleTop + nVisibleHeight > aModelArea.Bottom())
nVisibleTop = aModelArea.Bottom() - nVisibleHeight;
if (nVisibleTop < aModelArea.Top())
nVisibleTop = aModelArea.Top();
if (nVisibleLeft + nVisibleWidth > aModelArea.Right())
nVisibleLeft = aModelArea.Right() - nVisibleWidth;
if (nVisibleLeft < aModelArea.Left())
nVisibleLeft = aModelArea.Left();
}
const Point aRequestedTopLeft (nVisibleLeft, nVisibleTop);
if (aRequestedTopLeft == aVisibleArea.TopLeft())
return ::std::optional<Point>();
else
return ::std::optional<Point>(aRequestedTopLeft);
}
//===== VisibleAreaManager::TemporaryDisabler =================================
VisibleAreaManager::TemporaryDisabler::TemporaryDisabler (SlideSorter const & rSlideSorter)
: mrVisibleAreaManager(rSlideSorter.GetController().GetVisibleAreaManager())
{
++mrVisibleAreaManager.mnDisableCount;
}
VisibleAreaManager::TemporaryDisabler::~TemporaryDisabler()
{
--mrVisibleAreaManager.mnDisableCount;
}
//===== VerticalVisibleAreaScroller ===========================================
namespace {
const sal_Int32 gnMaxScrollDistance = 300;
VisibleAreaScroller::VisibleAreaScroller (
SlideSorter& rSlideSorter,
const Point& rStart,
const Point& rEnd)
: mrSlideSorter(rSlideSorter),
maStart(rStart),
maEnd(rEnd),
maAccelerationFunction(
controller::AnimationParametricFunction(
controller::AnimationBezierFunction (0.1,0.6)))
{
// When the distance to scroll is larger than a threshold then first
// jump to within this distance of the final value and start the
// animation from there.
if (std::abs(rStart.X()-rEnd.X()) > gnMaxScrollDistance)
{
if (rStart.X() < rEnd.X())
maStart.setX( rEnd.X()-gnMaxScrollDistance );
else
maStart.setX( rEnd.X()+gnMaxScrollDistance );
}
if (std::abs(rStart.Y()-rEnd.Y()) > gnMaxScrollDistance)
{
if (rStart.Y() < rEnd.Y())
maStart.setY( rEnd.Y()-gnMaxScrollDistance );
else
maStart.setY( rEnd.Y()+gnMaxScrollDistance );
}
}
void VisibleAreaScroller::operator() (const double nTime)
{
const double nLocalTime (maAccelerationFunction(nTime));
mrSlideSorter.GetController().GetScrollBarManager().SetTopLeft(
Point(
sal_Int32(0.5 + maStart.X() * (1.0 - nLocalTime) + maEnd.X() * nLocalTime),
sal_Int32 (0.5 + maStart.Y() * (1.0 - nLocalTime) + maEnd.Y() * nLocalTime)));
}
} // end of anonymous namespace
} // end of namespace ::sd::slidesorter::controller
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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