path: root/sfx2/source/control/templateabstractview.cxx

/* -*- 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/.
 */

#include <sfx2/templateabstractview.hxx>

#include <comphelper/processfactory.hxx>
#include <sfx2/templateview.hxx>
#include <sfx2/templateviewitem.hxx>
#include <unotools/ucbstreamhelper.hxx>
#include <vcl/pngread.hxx>

#include <com/sun/star/embed/ElementModes.hpp>
#include <com/sun/star/embed/XStorage.hpp>
#include <com/sun/star/embed/StorageFactory.hpp>
#include <com/sun/star/lang/XComponent.hpp>
#include <com/sun/star/lang/XMultiServiceFactory.hpp>
#include <com/sun/star/lang/XSingleServiceFactory.hpp>

bool ViewFilter_Application::operator () (const ThumbnailViewItem *pItem)
{
    const TemplateViewItem *pTempItem = static_cast<const TemplateViewItem*>(pItem);

    if (mApp == FILTER_APP_WRITER)
    {
        return pTempItem->getFileType() == "OpenDocument Text" ||
                pTempItem->getFileType() == "OpenDocument Text Template";
    }
    else if (mApp == FILTER_APP_CALC)
    {
        return pTempItem->getFileType() == "OpenDocument Spreadsheet" ||
                pTempItem->getFileType() == "OpenDocument Spreadsheet Template";
    }
    else if (mApp == FILTER_APP_IMPRESS)
    {
        return pTempItem->getFileType() == "OpenDocument Presentation" ||
                pTempItem->getFileType() == "OpenDocument Presentation Template";
    }
    else if (mApp == FILTER_APP_DRAW)
    {
        return pTempItem->getFileType() == "OpenDocument Drawing" ||
                pTempItem->getFileType() == "OpenDocument Drawing Template";
    }

    return true;
}

bool ViewFilter_Keyword::operator ()(const ThumbnailViewItem *pItem)
{
    assert(pItem);

    return pItem->maTitle.matchIgnoreAsciiCase(maKeyword);
}

TemplateAbstractView::TemplateAbstractView (Window *pParent, WinBits nWinStyle, bool bDisableTransientChildren)
    : ThumbnailView(pParent,nWinStyle,bDisableTransientChildren),
      mpItemView(new TemplateView(this)),
      mbInSelectionModeHdl(false)
{
    mpItemView->setItemStateHdl(LINK(this,TemplateAbstractView,OverlayItemStateHdl));
    mpItemView->setSelectionModeHdl(LINK(this,TemplateAbstractView,OverlaySelectionModeHdl));
}

TemplateAbstractView::TemplateAbstractView(Window *pParent, const ResId &rResId, bool bDisableTransientChildren)
    : ThumbnailView(pParent,rResId,bDisableTransientChildren),
      mpItemView(new TemplateView(this)),
      mbInSelectionModeHdl(false)
{
    mpItemView->setItemStateHdl(LINK(this,TemplateAbstractView,OverlayItemStateHdl));
    mpItemView->setSelectionModeHdl(LINK(this,TemplateAbstractView,OverlaySelectionModeHdl));
}

TemplateAbstractView::~TemplateAbstractView ()
{
    delete mpItemView;
}

void TemplateAbstractView::setItemDimensions(long ItemWidth, long ThumbnailHeight, long DisplayHeight, int itemPadding)
{
    ThumbnailView::setItemDimensions(ItemWidth,ThumbnailHeight,DisplayHeight,itemPadding);

    mpItemView->setItemDimensions(ItemWidth,ThumbnailHeight,DisplayHeight,itemPadding);
}

sal_uInt16 TemplateAbstractView::getOverlayRegionId() const
{
    return mpItemView->getId();
}

const OUString &TemplateAbstractView::getOverlayName() const
{
    return mpItemView->getName();
}

bool TemplateAbstractView::isOverlayVisible () const
{
    return mpItemView->IsVisible();
}

void TemplateAbstractView::deselectOverlayItems()
{
    mpItemView->deselectItems();
}

void TemplateAbstractView::deselectOverlayItem(const sal_uInt16 nItemId)
{
    mpItemView->deselectItem(nItemId);
}

void TemplateAbstractView::sortOverlayItems(const boost::function<bool (const ThumbnailViewItem*,
                                                                        const ThumbnailViewItem*) > &func)
{
    mpItemView->sortItems(func);
}

void TemplateAbstractView::filterTemplatesByKeyword(const OUString &rKeyword)
{
    if (mpItemView->IsVisible())
        mpItemView->filterItems(ViewFilter_Keyword(rKeyword));
}

void TemplateAbstractView::setOverlayClickHdl(const Link &rLink)
{
    mpItemView->setClickHdl(rLink);
}

void TemplateAbstractView::setOverlayCloseHdl(const Link &rLink)
{
    mpItemView->setCloseHdl(rLink);
}

BitmapEx TemplateAbstractView::scaleImg (const BitmapEx &rImg, long width, long height)
{
    BitmapEx aImg = rImg;

    if ( !rImg.IsEmpty() )
    {

        const Size& aImgSize = aImg.GetSizePixel();
        double nRatio = double(aImgSize.getWidth()) / double(aImgSize.getHeight());

        long nDestWidth = aImgSize.getWidth();
        long nDestHeight = aImgSize.getHeight();

        // Which one side is the overflowing most?
        long nDistW = aImgSize.getWidth() - width;
        long nDistH = aImgSize.getHeight() - height;

        // Use the biggest overflow side to make it fit the destination
        if ( nDistW >= nDistH && nDistW > 0 )
        {
            nDestWidth = width;
            nDestHeight = width / nRatio;
        }
        else if ( nDistW < nDistH && nDistH > 0 )
        {
            nDestHeight = height;
            nDestWidth = height * nRatio;
        }

        aImg.Scale(Size(nDestWidth,nDestHeight));
    }

    return aImg;
}

BitmapEx TemplateAbstractView::fetchThumbnail (const OUString &msURL, long width, long height)
{
    using namespace ::com::sun::star;
    using namespace ::com::sun::star::uno;

    // Load the thumbnail from a template document.
    uno::Reference<io::XInputStream> xIStream;

    uno::Reference< uno::XComponentContext > xContext (comphelper::getProcessComponentContext());

    try
    {
        uno::Reference<lang::XSingleServiceFactory> xStorageFactory = embed::StorageFactory::create( xContext );

        uno::Sequence<uno::Any> aArgs (2);
        aArgs[0] <<= msURL;
        aArgs[1] <<= embed::ElementModes::READ;
        uno::Reference<embed::XStorage> xDocStorage (
            xStorageFactory->createInstanceWithArguments(aArgs),
            uno::UNO_QUERY);

        try
        {
            if (xDocStorage.is())
            {
                uno::Reference<embed::XStorage> xStorage (
                    xDocStorage->openStorageElement(
                        "Thumbnails",
                        embed::ElementModes::READ));
                if (xStorage.is())
                {
                    uno::Reference<io::XStream> xThumbnailCopy (
                        xStorage->cloneStreamElement("thumbnail.png"));
                    if (xThumbnailCopy.is())
                        xIStream = xThumbnailCopy->getInputStream();
                }
            }
        }
        catch (const uno::Exception& rException)
        {
            OSL_TRACE (
                "caught exception while trying to access Thumbnail/thumbnail.png of %s: %s",
                ::rtl::OUStringToOString(msURL,
                    RTL_TEXTENCODING_UTF8).getStr(),
                ::rtl::OUStringToOString(rException.Message,
                    RTL_TEXTENCODING_UTF8).getStr());
        }

        try
        {
            // An (older) implementation had a bug - The storage
            // name was "Thumbnail" instead of "Thumbnails".  The
            // old name is still used as fallback but this code can
            // be removed soon.
            if ( ! xIStream.is())
            {
                uno::Reference<embed::XStorage> xStorage (
                    xDocStorage->openStorageElement( "Thumbnail",
                        embed::ElementModes::READ));
                if (xStorage.is())
                {
                    uno::Reference<io::XStream> xThumbnailCopy (
                        xStorage->cloneStreamElement("thumbnail.png"));
                    if (xThumbnailCopy.is())
                        xIStream = xThumbnailCopy->getInputStream();
                }
            }
        }
        catch (const uno::Exception& rException)
        {
            OSL_TRACE (
                "caught exception while trying to access Thumbnails/thumbnail.png of %s: %s",
                ::rtl::OUStringToOString(msURL,
                    RTL_TEXTENCODING_UTF8).getStr(),
                ::rtl::OUStringToOString(rException.Message,
                    RTL_TEXTENCODING_UTF8).getStr());
        }
    }
    catch (const uno::Exception& rException)
    {
        OSL_TRACE (
            "caught exception while trying to access tuhmbnail of %s: %s",
            ::rtl::OUStringToOString(msURL,
                RTL_TEXTENCODING_UTF8).getStr(),
            ::rtl::OUStringToOString(rException.Message,
                RTL_TEXTENCODING_UTF8).getStr());
    }

    // Extract the image from the stream.
    BitmapEx aThumbnail;
    if (xIStream.is())
    {
        ::std::auto_ptr<SvStream> pStream (
            ::utl::UcbStreamHelper::CreateStream (xIStream));
        ::vcl::PNGReader aReader (*pStream);
        aThumbnail = aReader.Read ();
    }

    return TemplateAbstractView::scaleImg(aThumbnail,width,height);
}

void TemplateAbstractView::Resize()
{
    mpItemView->SetSizePixel(GetSizePixel());
}

void TemplateAbstractView::Paint(const Rectangle &rRect)
{
    if (!mpItemView->IsVisible())
        ThumbnailView::Paint(rRect);
}

void TemplateAbstractView::DrawItem(ThumbnailViewItem *pItem)
{
    if (!mpItemView->IsVisible())
        ThumbnailView::DrawItem(pItem);
}

void TemplateAbstractView::OnSelectionMode (bool bMode)
{
    if (!mbInSelectionModeHdl)
    {
        if (mpItemView->IsVisible())
        {
            mbSelectionMode = bMode;
            mpItemView->setSelectionMode(bMode);
        }
        else
            ThumbnailView::OnSelectionMode(bMode);
    }
}

IMPL_LINK(TemplateAbstractView, OverlayItemStateHdl, const ThumbnailViewItem*, pItem)
{
    maOverlayItemStateHdl.Call((void*)pItem);
    return 0;
}

IMPL_LINK(TemplateAbstractView, OverlaySelectionModeHdl, bool*, pMode)
{
    mbInSelectionModeHdl = true;
    setSelectionMode(*pMode);
    if (!*pMode)
    {
        deselectOverlayItems();
    }
    mbInSelectionModeHdl = false;
    return 0;
}

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