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sitewatc.cpp：源码内容
							/* ***** BEGIN LICENSE BLOCK *****
 * Source last modified: $Id: sitewatc.cpp,v 1.2.12.2 2004/07/13 18:31:00 bobclark Exp $
 * 
 * Portions Copyright (c) 1995-2004 RealNetworks, Inc. All Rights Reserved.
 * 
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 * ***** END LICENSE BLOCK ***** */
// system
#include <math.h>
#include <time.h>     // smlparse.h dependency
// include
#include "hxtypes.h"
#include "hxwintyp.h"
#include "hxcom.h"
#include "hxwin.h"
#include "smiltype.h"
#include "hxengin.h"
#include "hxcore.h"  // smldoc.h   dependency
#include "hxgroup.h" // smldoc.h   dependency
#include "hxsite2.h" // smldoc.h   dependency
#include "ihxpckts.h" // smldoc.h   dependency
#include "hxvport.h" // smldoc.h   dependency
#include "hxclsnk.h" // smldoc.h   dependency
#include "hxmmrkr.h" // smldoc.h   dependency
#include "hxinter.h" // smldoc.h   dependency
#include "hxxml.h"   // smlparse.h dependency
#include "hxerror.h"
// pnmisc
#include "hxwinver.h" // smlparse.h dependency
#include "hxtick.h"
// pncont
#include "hxstring.h"
#include "hxmap.h"
#include "hxslist.h"
// rnxmllib
#include "hxxmlprs.h" // smlparse.h dependency
// rmasmil
#include "smlelem.h"
#include "smlparse.h"
// smlrendr
#include "evnthook.h" // smldoc.h   dependency
#include "siteuser.h" // smldoc.h   dependency
#include "passivsw.h" // smldoc.h   dependency
#include "layout.h"
#include "smldoc.h"
#include "sitewatc.h"
// pndebug
#include "smlrmlog.h"
#include "hxheap.h"
#ifdef _DEBUG
#undef HX_THIS_FILE		
static const char HX_THIS_FILE[] = __FILE__;
#endif
CSmilSiteWatcher::CSmilSiteWatcher(CSmilDocumentRenderer* pDoc,
                                   const char*            pID,
                                   BOOL                   bIsChildSite,
                                   const char*            pSourceID) :
    m_id(pID),
    m_SourceID(pSourceID)
{
    // Initialize the members
    m_lRefCount              = 0;
    m_pDoc                   = pDoc;
    m_pSite                  = NULL;
    m_Rect.m_dLeft           = 0.0;
    m_Rect.m_eLeftType       = CSS2TypeAuto;
    m_Rect.m_dTop            = 0.0;
    m_Rect.m_eTopType        = CSS2TypeAuto;
    m_Rect.m_dRight          = 0.0;
    m_Rect.m_eRightType      = CSS2TypeAuto;
    m_Rect.m_dBottom         = 0.0;
    m_Rect.m_eBottomType     = CSS2TypeAuto;
    m_Rect.m_dWidth          = 0.0;
    m_Rect.m_eWidthType      = CSS2TypeAuto;
    m_Rect.m_dHeight         = 0.0;
    m_Rect.m_eHeightType     = CSS2TypeAuto;
    m_RegPoint.m_dLeft       = 0.0;
    m_RegPoint.m_eLeftType   = CSS2TypeAuto;
    m_RegPoint.m_dTop        = 0.0;
    m_RegPoint.m_eTopType    = CSS2TypeAuto;
    m_RegPoint.m_dRight      = 0.0;
    m_RegPoint.m_eRightType  = CSS2TypeAuto;
    m_RegPoint.m_dBottom     = 0.0;
    m_RegPoint.m_eBottomType = CSS2TypeAuto;
    m_RegPoint.m_eRegAlign   = RegAlignTopLeft;
    m_MediaSize.cx           = 0;
    m_MediaSize.cy           = 0;
    m_eResizeBehavior        = ResizeZoom;
    m_dZoomScaleFactorX      = 1.0;
    m_dZoomScaleFactorY      = 1.0;
    m_bIsChildSite           = bIsChildSite;
    m_bChangingSize          = FALSE;
    m_bFirstSizeChange       = TRUE;
    m_bMediaSizeSet          = FALSE;
    m_bMediaIsBrush          = FALSE;
    // Initialize the RegPoint
    if(m_pDoc)
    {
        m_pDoc->AddRef();
        // RegPoints can come from two places - they can
        // either be idrefs or they can be predefined
        CSmilSource* pSource = m_pDoc->getSource(pSourceID);
        if (pSource)
        {
            // Check if this is a <brush>
            if (pSource->m_pNode &&
                pSource->m_pNode->m_tag == SMILBrush)
            {
                m_bMediaIsBrush = TRUE;
            }
            // Copy the Layout rect. This is the subregion
            // positioning rect which was specified on the
            // media element (i.e. - <img ... left="20" .../>)
            m_Rect = pSource->m_Rect;
            // Get the regPoint
            if (pSource->m_bRegPointIsPredef)
            {
                // Since the regPoint is predefined, then
                // there is no regAlign from the <regPoint>.
                // Therefore, we need to use the regAlign
                // that was specified with the source
                m_RegPoint.m_eRegAlign = pSource->m_eRegAlign;
                // For predefined regPoints, they are always
                // expressed in percentages, not in absolute lengths
                m_RegPoint.m_eLeftType = CSS2TypePercentage;
                m_RegPoint.m_eTopType  = CSS2TypePercentage;
                // Compute the regPoint
                switch (pSource->m_ePredefRegPoint)
                {
                    case RegAlignTopLeft:
                        {
                            m_RegPoint.m_dLeft = 0.0;
                            m_RegPoint.m_dTop  = 0.0;
                        }
                        break;
                    case RegAlignTopMid:
                        {
                            m_RegPoint.m_dLeft = 50.0;
                            m_RegPoint.m_dTop  =  0.0;
                        }
                        break;
                    case RegAlignTopRight:
                        {
                            m_RegPoint.m_dLeft = 100.0;
                            m_RegPoint.m_dTop  =   0.0;
                        }
                        break;
                    case RegAlignMidLeft:
                        {
                            m_RegPoint.m_dLeft =  0.0;
                            m_RegPoint.m_dTop  = 50.0;
                        }
                        break;
                    case RegAlignCenter:
                        {
                            m_RegPoint.m_dLeft = 50.0;
                            m_RegPoint.m_dTop  = 50.0;
                        }
                        break;
                    case RegAlignMidRight:
                        {
                            m_RegPoint.m_dLeft = 100.0;
                            m_RegPoint.m_dTop  =  50.0;
                        }
                        break;
                    case RegAlignBottomLeft:
                        {
                            m_RegPoint.m_dLeft =   0.0;
                            m_RegPoint.m_dTop  = 100.0;
                        }
                        break;
                    case RegAlignBottomMid:
                        {
                            m_RegPoint.m_dLeft =  50.0;
                            m_RegPoint.m_dTop  = 100.0;
                        }
                        break;
                    case RegAlignBottomRight:
                        {
                            m_RegPoint.m_dLeft = 100.0;
                            m_RegPoint.m_dTop  = 100.0;
                        }
                        break;
                }
            }
            else
            {
                // The regPoint is not predefined, but rather
                // is an idref to a <regPoint> element. So look
                // up that element
                CSmilRegPoint* pRegPt = m_pDoc->getRegPoint(pSource->m_RegPoint);
                if (pRegPt)
                {
                    // We simply need to copy the RegPoint struct
                    // from the CSmilRegPoint element
                    m_RegPoint = pRegPt->m_RegPoint;
                    // <regPoint> elements have a default "regAlign"
                    // attribute. However, the media object element
                    // can override this regAlign value.
                    if (pSource->m_bRegAlignSpecified)
                    {
                        // The media object element DID specify
                        // a regAlign attribute, so this attribute
                        // overrides the regAlign attribute in the
                        // <regPoint> element.
                        m_RegPoint.m_eRegAlign = pSource->m_eRegAlign;
                    }
                }
            }
            // Now we can compute the fit attribute. The default
            // fit attribute is specified with the <region>. However,
            // the media object element can override this attribute.
            // So first we need to get the region.
            CSmilBasicRegion* pRegion = m_pDoc->getRegionByID(m_id);
            if (pRegion)
            {
                // Initially assign the region's fit value
                m_eFit = pRegion->m_eFit;
            }
            // Now if the source has specified a fit
            // value, then override the region's fit value
            if (pSource->m_bFitSpecified)
            {
                m_eFit = pSource->m_eFit;
            }
        }
    }
}
CSmilSiteWatcher::~CSmilSiteWatcher()
{
    close();
}
HX_RESULT CSmilSiteWatcher::close()
{
    HX_RELEASE(m_pDoc);
    HX_RELEASE(m_pSite);
    return HXR_OK;
}
void CSmilSiteWatcher::SetZoomScaleFactors(double dX, double dY)
{
    if (dX > 0.0)
    {
        m_dZoomScaleFactorX = dX;
    }
    if (dY > 0.0)
    {
        m_dZoomScaleFactorY = dY;
    }
}
void CSmilSiteWatcher::SetResizeBehavior(ResizeBehavior eBehavior)
{
    m_eResizeBehavior = eBehavior;
}
STDMETHODIMP CSmilSiteWatcher::QueryInterface(REFIID riid, void** ppvObj)
{
    HX_RESULT retVal = HXR_OK;
    if(IsEqualIID(riid, IID_IUnknown))
    {
        AddRef();
        *ppvObj = this;
    }
    else if(IsEqualIID(riid, IID_IHXSiteWatcher))
    {
        AddRef();
        *ppvObj = (IHXSiteWatcher*) this;
    }
    else
    {
        *ppvObj = NULL;
        retVal  = HXR_NOINTERFACE;
    }
    return retVal;
}
STDMETHODIMP_(ULONG32) CSmilSiteWatcher::AddRef()
{
    return InterlockedIncrement(&m_lRefCount);
}
STDMETHODIMP_(ULONG32) CSmilSiteWatcher::Release()
{
    if(InterlockedDecrement(&m_lRefCount) > 0)
    {
        return m_lRefCount;
    }
    delete this;
    return 0;
}
STDMETHODIMP CSmilSiteWatcher::AttachSite(IHXSite* pSite)
{
    HX_RESULT retVal = HXR_OK;
    HX_RELEASE(m_pSite);
    m_pSite = pSite;
    if(m_pSite)
    {
        m_pSite->AddRef();
    }
    return retVal;
}
STDMETHODIMP CSmilSiteWatcher::DetachSite()
{
    HX_RESULT retVal = HXR_OK;
    HX_RELEASE(m_pSite);
    return HXR_OK;
}
STDMETHODIMP CSmilSiteWatcher::ChangingPosition(HXxPoint      oldPos,
                                                REF(HXxPoint) newPos)
{
    HX_RESULT retVal = HXR_OK;
    if(!m_bChangingSize)
    {
        CSmilBasicRegion* pRegion = m_pDoc->getRegionByID(m_id);
        if(pRegion && m_bMediaSizeSet)
        {
            // Pick the rect to use as the parent. If we 
            // have a ResizeBehavior of Zoom and are indeed
            // zooming, then use the unzoomed parent width.
            // Otherwise, use the regular zoomed parent width.
            HXxRect cRect = pRegion->m_rect;
            if ((m_dZoomScaleFactorX != 1.0 ||
                 m_dZoomScaleFactorY != 1.0) &&
                m_eResizeBehavior == ResizeZoom)
            {
                cRect = pRegion->m_RectNoZoom;
            }
            // First we need to compute the subregion rect. We can't
            // do this just once, since the subregion rect parameters
            // may be getting animated.
            HXxRect cSubRegionRect = {0, 0, 0, 0};
            CSmilBasicRegion::resolveDimension(m_Rect.m_dLeft,  m_Rect.m_eLeftType,
                                               m_Rect.m_dRight, m_Rect.m_eRightType,
                                               m_Rect.m_dWidth, m_Rect.m_eWidthType,
                                               TRUE, HXxRECT_WIDTH(cRect),
                                               cSubRegionRect.left,
                                               cSubRegionRect.right);
            CSmilBasicRegion::resolveDimension(m_Rect.m_dTop,    m_Rect.m_eTopType,
                                               m_Rect.m_dBottom, m_Rect.m_eBottomType,
                                               m_Rect.m_dHeight, m_Rect.m_eHeightType,
                                               TRUE, HXxRECT_HEIGHT(cRect),
                                               cSubRegionRect.top,
                                               cSubRegionRect.bottom);
            // The calculation above was done in the space of the
            // region. The calculations below are done in the space
            // of the region's parent, so we need to offset the subregion
            // rect by the region's upper left corner.
            cSubRegionRect.left   += cRect.left;
            cSubRegionRect.top    += cRect.top;
            cSubRegionRect.right  += cRect.left;
            cSubRegionRect.bottom += cRect.top;
            // Now we need to compute the absolute coordinates
            // of the regPoint. Since the regPoint could be in
            // percentage values, and the size of the region
            // could be changing under animation, then we 
            // must recompute the absolute coordinates of the
            // regPoint every time. This regPoint is in the
            // space of the region's PARENT and not in the space
            // of the region's rect itself.
            HXxPoint cRegPoint = {0, 0};
            m_pDoc->computeRegPoint(cSubRegionRect,
                                    m_RegPoint,
                                    cRegPoint);
            // Now that we know the absolute coordinates
            // of the regPoint, then we can compute the 
            // media layout within the region rect. Note
            // that the following calculation takes place
            // in the coordinate space of the region's PARENT,
            // and not the region's rect itself.
            HXxRect  cMediaRect = {0, 0, 0, 0};
            retVal = m_pDoc->computeMediaLayout(cSubRegionRect,
                                                m_eFit,
                                                cRegPoint,
                                                m_RegPoint.m_eRegAlign,
                                                m_MediaSize,
                                                cMediaRect,
                                                m_bMediaIsBrush);
            if (SUCCEEDED(retVal))
            {
                // Now since the calculation of the media size was
                // done in the space of the region's PARENT, then
                // and we need to set the size of the media in the
                // coordinate space of the REGION, then we need
                // to translate the media rect to the coordinate
                // space of the region.
                cMediaRect.left   -= cRect.left;
                cMediaRect.top    -= cRect.top;
                cMediaRect.right  -= cRect.left;
                cMediaRect.bottom -= cRect.top;
                // Now we can assign the new position
                newPos.x = cMediaRect.left;
                newPos.y = cMediaRect.top;
                // If we have a resize behavior of Zoom, then
                // we compute everything off of the original root-layout
                // size, and then simply scale by the zoom factors.
                if ((m_dZoomScaleFactorX != 1.0 ||
                     m_dZoomScaleFactorY != 1.0) &&
                    m_eResizeBehavior == ResizeZoom)
                {
                    newPos.x = (INT32) floor(m_dZoomScaleFactorX * ((double) newPos.x) + 0.5);
                    newPos.y = (INT32) floor(m_dZoomScaleFactorY * ((double) newPos.y) + 0.5);
                }
            }
        }
    }
    MLOG_LAYOUT(NULL,
                "%lutChangingPosition((%ld,%ld),(%ld,%ld)) m_id=%s m_SourceID=%sn",
                HX_GET_BETTERTICKCOUNT(),
                oldPos.x, oldPos.y, newPos.x, newPos.y,
                (const char*) m_id,
                (const char*) m_SourceID);
    return retVal;
}
STDMETHODIMP CSmilSiteWatcher::ChangingSize(HXxSize      oldSize,
                                            REF(HXxSize) newSize)
{
    HX_RESULT retVal = HXR_OK;
    if(!m_bChangingSize &&
       (newSize.cx != 0 || newSize.cy != 0))
    {
        CSmilBasicRegion* pRegion = m_pDoc->getRegionByID(m_id);
        if(pRegion)
        {
            // For almost all renderers, here's the sequence of
            // events: the core calls them with IHXSite::AttachSite()
            // and in that call, they call IHXSite::SetSize() with
            // the native size of their media. Therefore, we will assume
            // that the first call we get will be the native size of
            // the media.
            BOOL bForceSetPosition = FALSE;
            
            BOOL bHasSiteUser = FALSE;
            IHXSiteUser* pUser = NULL;
            m_pSite->GetUser(pUser);
            if (pUser)
            {
                bHasSiteUser = TRUE;
            }
            HX_RELEASE(pUser);
            
            if (bHasSiteUser && m_bFirstSizeChange)
            {
                MLOG_LAYOUT(NULL,
                            "Media size for %s is (%ld,%ld)n",
                            (const char*) m_SourceID,
                            newSize.cx, newSize.cy);
                // Save off the native media size
                m_MediaSize        = newSize;
                m_bMediaSizeSet    = TRUE;
                m_bFirstSizeChange = FALSE;
                bForceSetPosition  = TRUE;
                if (m_pDoc)
                {
                    m_pDoc->setMediaNativeSize(m_SourceID, newSize);
                }
                // XXXMEH - this is legacy, which saves
                // the media size into the region. However,
                // this SHOULD NOT be used, since multiple media
                // can play to the same region. TODO - if we 
                // can, make sure this is not used and then
                // delete it from the region object.
                pRegion->m_originalMediaSize = newSize;
                pRegion->m_bMediaSizeSet     = TRUE;
            }
            // Pick the rect to use as the parent. If we 
            // have a ResizeBehavior of Zoom and are indeed
            // zooming, then use the unzoomed parent width.
            // Otherwise, use the regular zoomed parent width.
            HXxRect cRect = pRegion->m_rect;
            if ((m_dZoomScaleFactorX != 1.0 ||
                 m_dZoomScaleFactorY != 1.0) &&
                m_eResizeBehavior == ResizeZoom)
            {
                cRect = pRegion->m_RectNoZoom;
            }
            // First we need to compute the subregion rect. We can't
            // do this just once, since the subregion rect parameters
            // may be getting animated.
            HXxRect cSubRegionRect = {0, 0, 0, 0};
            CSmilBasicRegion::resolveDimension(m_Rect.m_dLeft,  m_Rect.m_eLeftType,
                                               m_Rect.m_dRight, m_Rect.m_eRightType,
                                               m_Rect.m_dWidth, m_Rect.m_eWidthType,
                                               TRUE, HXxRECT_WIDTH(cRect),
                                               cSubRegionRect.left,
                                               cSubRegionRect.right);
            CSmilBasicRegion::resolveDimension(m_Rect.m_dTop,    m_Rect.m_eTopType,
                                               m_Rect.m_dBottom, m_Rect.m_eBottomType,
                                               m_Rect.m_dHeight, m_Rect.m_eHeightType,
                                               TRUE, HXxRECT_HEIGHT(cRect),
                                               cSubRegionRect.top,
                                               cSubRegionRect.bottom);
            // The calculation above was done in the space of the
            // region. The calculations below are done in the space
            // of the region's parent, so we need to offset the subregion
            // rect by the region's upper left corner.
            cSubRegionRect.left   += cRect.left;
            cSubRegionRect.top    += cRect.top;
            cSubRegionRect.right  += cRect.left;
            cSubRegionRect.bottom += cRect.top;
            // Now we need to compute the absolute coordinates
            // of the regPoint. Since the regPoint could be in
            // percentage values, and the size of the region
            // could be changing under animation, then we 
            // must recompute the absolute coordinates of the
            // regPoint every time. This regPoint is in the
            // space of the region's PARENT and not in the space
            // of the region's rect itself.
            HXxPoint cRegPoint = {0, 0};
            m_pDoc->computeRegPoint(cSubRegionRect,
                                    m_RegPoint,
                                    cRegPoint);
            // Now that we know the absolute coordinates
            // of the regPoint, then we can compute the 
            // media layout within the region rect. Note
            // that the following calculation takes place
            // in the coordinate space of the region's PARENT,
            // and not the region's rect itself.
            HXxRect  cMediaRect = {0, 0, 0, 0};
            retVal = m_pDoc->computeMediaLayout(cSubRegionRect,
                                                m_eFit,
                                                cRegPoint,
                                                m_RegPoint.m_eRegAlign,
                                                m_MediaSize,
                                                cMediaRect,
                                                m_bMediaIsBrush);
            if (SUCCEEDED(retVal))
            {
                // Now since the calculation of the media size was
                // done in the space of the region's PARENT, then
                // and we need to set the size of the media in the
                // coordinate space of the REGION, then we need
                // to translate the media rect to the coordinate
                // space of the region.
                cMediaRect.left   -= cRect.left;
                cMediaRect.top    -= cRect.top;
                cMediaRect.right  -= cRect.left;
                cMediaRect.bottom -= cRect.top;
                // So now the new width and height
                // can be calculated.
                newSize.cx = HXxRECT_WIDTH(cMediaRect);
                newSize.cy = HXxRECT_HEIGHT(cMediaRect);
                // If we have a resize behavior of Zoom, then
                // we compute everything off of the original root-layout
                // size, and then simply scale by the zoom factors.
                if ((m_dZoomScaleFactorX != 1.0 ||
                     m_dZoomScaleFactorY != 1.0) &&
                    m_eResizeBehavior == ResizeZoom)
                {
                    newSize.cx = (INT32) floor(m_dZoomScaleFactorX * ((double) newSize.cx) + 0.5);
                    newSize.cy = (INT32) floor(m_dZoomScaleFactorY * ((double) newSize.cy) + 0.5);
                }
                // Set the current media size to this value
                // XXXMEH - TODO is this actually used anywhere? We
                // should not really have a media size set into
                // the region object anywhere, since multiple
                // media can play to the same region
                pRegion->m_mediaSize = newSize;
                // As mentioned above, the renderers will usually 
                // call IHXSite::SetSize() when they are FIRST called
                // with IHXSite::AttachSite(). However, since renderers
                // don't have an idea of relative position to other renderers,
                // then they rarely call IHXSite::SetPosition(). Therefore,
                // if this is the first time through, we will need to explicitly
                // call IHXSite::SetPosition().
                if (bForceSetPosition)
                {
                    // Since we have a site watcher, then it
                    // doesn't matter what we pass in, the site
                    // watcher will change it to what it needs to
                    // be. So pass in some arbitrary position.
                    HXxPoint cPos = {1, 1};
                    if (m_pSite)
                    {
                        m_pSite->SetPosition(cPos);
                    }
                }
                // If this is a scrolling site, then set the flag
                if (m_eFit == FitScroll && m_pSite)
                {
                    IHXValues* pValues = NULL;
                    m_pSite->QueryInterface(IID_IHXValues, (void**) &pValues);
                    if (pValues)
                    {
                        pValues->SetPropertyULONG32("ScrollingSite", 1);
                    }
                    HX_RELEASE(pValues);
                }
            }
        }
    }
    MLOG_LAYOUT(NULL,
                "%lutChangingSize((%ld,%ld),(%ld,%ld)) m_id=%s m_SourceID=%sn",
                HX_GET_BETTERTICKCOUNT(),
                oldSize.cx, oldSize.cy, newSize.cx, newSize.cy,
                (const char*) m_id,
                (const char*) m_SourceID);
    return retVal;
}

						