docexample_nocontentstream.cpp

#include "NOPackage.h"
#include "NOPage.h"
#include "NOContentStreamNavigator.h"

using namespace NiXPSObjects;

// this examples overlays page 1 of document 1 with page 1 of document 1 of another XPS package
void overlayPage(const UTF8Char *baseXPSdoc, const UTF8Char *overlayXPSdoc, const UTF8Char *pOut)
{
        // start
        NOPackage *basePackage, *overlayPackage;
        NOPage basePage, overlayPage;

        // read base doc, get handler to page in question
        basePackage = NOPackage::readPackageFromFile(baseXPSdoc);
        basePage = basePackage->getDocument(0).getPage(0);

        // read overlay doc, get handler to page in question
        overlayPackage = NOPackage::readPackageFromFile(overlayXPSdoc);
        overlayPage=overlayPackage->getDocument(0).getPage(0);

        // get a content stream navigator in the basePage, navigate to the 'FixedPage'
        NOContentStreamNavigator mergedNav=basePage.getContentStreamNavigator();
        mergedNav.toChild("FixedPage");

        // inject some xml prefix
        mergedNav.insertAsChild("<!-- some prefix xml code -->");

        // get a content stream navigator in the overlayPage, navigate to the 'FixedPage'
        NOContentStreamNavigator overlayNav=overlayPage.getContentStreamNavigator();
        overlayNav.toChild("FixedPage");

        // insert in the overlayNav childs into the merged page
        for (UInt32 lCount=0; lCount<overlayNav.getNumberOfChilds(); lCount++)
        {
                NOContentStreamNavigator lNav=overlayNav;
                lNav.toChild(lCount);
                mergedNav.insertAsChild(lNav);
        }
        
        // inject some xml postfix
        mergedNav.insertAsChild("<!-- some postfix xml code -->");
                
        // So now document 0 has some page 0...

        // copy over the resources
        basePackage->getDocument(0).getPage(0).copyResourcesFrom(overlayPage);
        
        // normalize page content (so the URL's point to correct resources)
        basePage.normalizeContentStream();
                
        basePackage->writePackageToFile(pOut);

        // clean-up
        NOPackage::destroyPackage(overlayPackage);
        NOPackage::destroyPackage(basePackage);
}

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