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first version with new full-text infrastructure and slightly changed templates

from OFS.Folder import Folder
from Products.PageTemplates.ZopePageTemplate import ZopePageTemplate
from Products.PageTemplates.PageTemplateFile import PageTemplateFile 
from AccessControl import ClassSecurityInfo
from AccessControl import getSecurityManager
from Globals import package_home

from Ft.Xml.Domlette import NonvalidatingReader
from Ft.Xml.Domlette import PrettyPrint, Print
from Ft.Xml import EMPTY_NAMESPACE, Parse


import Ft.Xml.XPath
import cStringIO
import xmlrpclib
import os.path
import sys
import cgi
import urllib
import logging
import math

import urlparse 
from types import *

def logger(txt,method,txt2):
    """logging"""
    logging.info(txt+ txt2)
    
    
def getInt(number, default=0):
    """returns always an int (0 in case of problems)"""
    try:
        return int(number)
    except:
        return int(default)

def getTextFromNode(nodename):
    """get the cdata content of a node"""
    if nodename is None:
        return ""
    nodelist=nodename.childNodes
    rc = ""
    for node in nodelist:
        if node.nodeType == node.TEXT_NODE:
           rc = rc + node.data
    return rc

def serializeNode(node, encoding='utf-8'):
    """returns a string containing node as XML"""
    buf = cStringIO.StringIO()
    Print(node, stream=buf, encoding=encoding)
    s = buf.getvalue()
    buf.close()
    return s

        
def getParentDir(path):
    """returns pathname shortened by one"""
    return '/'.join(path.split('/')[0:-1])
        

import socket

def urlopen(url,timeout=2):
        """urlopen mit timeout"""
        socket.setdefaulttimeout(timeout)
        ret=urllib.urlopen(url)
        socket.setdefaulttimeout(5)
        return ret


##
## documentViewer class
##
class documentViewer(Folder):
    """document viewer"""
    #textViewerUrl="http://127.0.0.1:8080/HFQP/testXSLT/getPage?"
    
    meta_type="Document viewer"
    
    security=ClassSecurityInfo()
    manage_options=Folder.manage_options+(
        {'label':'main config','action':'changeDocumentViewerForm'},
        )

    # templates and forms
    viewer_main = PageTemplateFile('zpt/viewer_main', globals())
    thumbs_main = PageTemplateFile('zpt/thumbs_main', globals())
    image_main = PageTemplateFile('zpt/image_main', globals()) # obsolete!
    page_main_images = PageTemplateFile('zpt/page_main_images', globals())
    page_main_text = PageTemplateFile('zpt/page_main_text', globals())
    head_main = PageTemplateFile('zpt/head_main', globals())
    docuviewer_css = PageTemplateFile('css/docuviewer.css', globals())
    info_xml = PageTemplateFile('zpt/info_xml', globals())

    thumbs_main_rss = PageTemplateFile('zpt/thumbs_main_rss', globals())
    security.declareProtected('View management screens','changeDocumentViewerForm')    
    changeDocumentViewerForm = PageTemplateFile('zpt/changeDocumentViewer', globals())

    
    def __init__(self,id,imageScalerUrl=None,textServerName=None,title="",digilibBaseUrl=None,thumbcols=2,thumbrows=10,authgroups="mpiwg"):
        """init document viewer"""
        self.id=id
        self.title=title
        self.thumbcols = thumbcols
        self.thumbrows = thumbrows
        # authgroups is list of authorized groups (delimited by ,)
        self.authgroups = [s.strip().lower() for s in authgroups.split(',')]
        # create template folder so we can always use template.something
        
        templateFolder = Folder('template')
        #self['template'] = templateFolder # Zope-2.12 style
        self._setObject('template',templateFolder) # old style
        try:
            from Products.XMLRpcTools.XMLRpcTools import XMLRpcServerProxy
            xmlRpcClient = XMLRpcServerProxy(id='fulltextclient', serverUrl=textServerName, use_xmlrpc=False)
            #templateFolder['fulltextclient'] = xmlRpcClient
            templateFolder._setObject('fulltextclient',xmlRpcClient)
        except Exception, e:
            logging.error("Unable to create XMLRpcTools for fulltextclient: "+str(e))
        try:
            from Products.zogiLib.zogiLib import zogiLib
            zogilib = zogiLib(id="zogilib", title="zogilib for docuviewer", dlServerURL=imageScalerUrl, layout="book")
            #templateFolder['zogilib'] = zogilib
            templateFolder._setObject('zogilib',zogilib)
        except Exception, e:
            logging.error("Unable to create zogiLib for zogilib: "+str(e))
        

    security.declareProtected('View','thumbs_rss')
    def thumbs_rss(self,mode,url,viewMode="auto",start=None,pn=1):
        '''
        view it
        @param mode: defines how to access the document behind url 
        @param url: url which contains display information
        @param viewMode: if images display images, if text display text, default is images (text,images or auto)
        
        '''
        logging.debug("HHHHHHHHHHHHHH:load the rss")
        logger("documentViewer (index)", logging.INFO, "mode: %s url:%s start:%s pn:%s"%(mode,url,start,pn))
        
        if not hasattr(self, 'template'):
            # create template folder if it doesn't exist
            self.manage_addFolder('template')
            
        if not self.digilibBaseUrl:
            self.digilibBaseUrl = self.findDigilibUrl() or "http://nausikaa.mpiwg-berlin.mpg.de/digitallibrary"
            
        docinfo = self.getDocinfo(mode=mode,url=url)
        pageinfo = self.getPageinfo(start=start,current=pn,docinfo=docinfo)
        pt = getattr(self.template, 'thumbs_main_rss')
        
        if viewMode=="auto": # automodus gewaehlt
            if docinfo.get("textURL",'') and self.textViewerUrl: #texturl gesetzt und textViewer konfiguriert
                viewMode="text"
            else:
                viewMode="images"
               
        return pt(docinfo=docinfo,pageinfo=pageinfo,viewMode=viewMode)
  
    security.declareProtected('View','index_html')
    def index_html(self,url,mode="texttool",viewMode="auto",start=None,pn=1,mk=None):
        '''
        view it
        @param mode: defines how to access the document behind url 
        @param url: url which contains display information
        @param viewMode: if images display images, if text display text, default is images (text,images or auto)
        
        '''
        
        logging.debug("documentViewer (index) mode: %s url:%s start:%s pn:%s"%(mode,url,start,pn))
        
        if not hasattr(self, 'template'):
            # this won't work
            logging.error("template folder missing!")
            return "ERROR: template folder missing!"
            
        if not getattr(self, 'digilibBaseUrl', None):
            self.digilibBaseUrl = self.findDigilibUrl() or "http://nausikaa.mpiwg-berlin.mpg.de/digitallibrary"
            
        docinfo = self.getDocinfo(mode=mode,url=url)
        pageinfo = self.getPageinfo(start=start,current=pn,docinfo=docinfo)
        pt = getattr(self.template, 'viewer_main')
        
        if viewMode=="auto": # automodus gewaehlt
            if docinfo.get("textURL",''): #texturl gesetzt und textViewer konfiguriert
                viewMode="text"
            else:
                viewMode="images"
               
        return pt(docinfo=docinfo,pageinfo=pageinfo,viewMode=viewMode,mk=self.generateMarks(mk))
  
    def generateMarks(self,mk):
        ret=""
	if mk is None:
		return ""
	
	if type(mk) is not ListType:
		mk=[mk]
        for m in mk:
            ret+="mk=%s"%m
        return ret

    def findDigilibUrl(self):
        """try to get the digilib URL from zogilib"""
        url = self.template.zogilib.getDLBaseUrl()
        return url
    
    def getStyle(self, idx, selected, style=""):
        """returns a string with the given style and append 'sel' if path == selected."""
        #logger("documentViewer (getstyle)", logging.INFO, "idx: %s selected: %s style: %s"%(idx,selected,style))
        if idx == selected:
            return style + 'sel'
        else:
            return style
    
    def getLink(self,param=None,val=None):
        """link to documentviewer with parameter param set to val"""
        params=self.REQUEST.form.copy()
        if param is not None:
            if val is None:
                if params.has_key(param):
                    del params[param]
            else:
                params[param] = str(val)
                
        if params.get("mode", None) == "filepath": #wenn beim erst Aufruf filepath gesetzt wurde aendere das nun zu imagepath
                params["mode"] = "imagepath"
                params["url"] = getParentDir(params["url"])
                
        # quote values and assemble into query string
        ps = "&".join(["%s=%s"%(k,urllib.quote(v)) for (k, v) in params.items()])
        url=self.REQUEST['URL1']+"?"+ps
        return url

    def getLinkAmp(self,param=None,val=None):
        """link to documentviewer with parameter param set to val"""
        params=self.REQUEST.form.copy()
        if param is not None:
            if val is None:
                if params.has_key(param):
                    del params[param]
            else:
                params[param] = str(val)
                
        # quote values and assemble into query string
        logging.info("XYXXXXX: %s"%repr(params.items()))
        ps = "&".join(["%s=%s"%(k,urllib.quote(v)) for (k, v) in params.items()])
        url=self.REQUEST['URL1']+"?"+ps
        return url
    
    def getInfo_xml(self,url,mode):
        """returns info about the document as XML"""

        if not self.digilibBaseUrl:
            self.digilibBaseUrl = self.findDigilibUrl() or "http://nausikaa.mpiwg-berlin.mpg.de/digitallibrary"
        
        docinfo = self.getDocinfo(mode=mode,url=url)
        pt = getattr(self.template, 'info_xml')
        return pt(docinfo=docinfo)

    
    def isAccessible(self, docinfo):
        """returns if access to the resource is granted"""
        access = docinfo.get('accessType', None)
        logger("documentViewer (accessOK)", logging.INFO, "access type %s"%access)
        if access is not None and access == 'free':
            logger("documentViewer (accessOK)", logging.INFO, "access is free")
            return True
        elif access is None or access in self.authgroups:
            # only local access -- only logged in users
            user = getSecurityManager().getUser()
            if user is not None:
                #print "user: ", user
                return (user.getUserName() != "Anonymous User")
            else:
                return False
        
        logger("documentViewer (accessOK)", logging.INFO, "unknown access type %s"%access)
        return False
    
                
    def getDirinfoFromDigilib(self,path,docinfo=None,cut=0):
        """gibt param von dlInfo aus"""
        num_retries = 3
        if docinfo is None:
            docinfo = {}
        
        for x in range(cut):
               
                path=getParentDir(path)
       
        infoUrl=self.digilibBaseUrl+"/dirInfo-xml.jsp?mo=dir&fn="+path
    
        logger("documentViewer (getparamfromdigilib)", logging.INFO, "dirInfo from %s"%(infoUrl))
        
        for cnt in range(num_retries):
            try:
                # dom = NonvalidatingReader.parseUri(imageUrl)
                txt=urllib.urlopen(infoUrl).read()
                dom = Parse(txt)
                break
            except:
                logger("documentViewer (getdirinfofromdigilib)", logging.ERROR, "error reading %s (try %d)"%(infoUrl,cnt))
        else:
            raise IOError("Unable to get dir-info from %s"%(infoUrl))
        
        sizes=dom.xpath("//dir/size")
        logger("documentViewer (getparamfromdigilib)", logging.INFO, "dirInfo:size"%sizes)
        
        if sizes:
            docinfo['numPages'] = int(getTextFromNode(sizes[0]))
        else:
            docinfo['numPages'] = 0
            
        # TODO: produce and keep list of image names and numbers
                        
        return docinfo
    
            
    def getIndexMeta(self, url):
        """returns dom of index.meta document at url"""
        num_retries = 3
        dom = None
        metaUrl = None
        if url.startswith("http://"):
            # real URL
            metaUrl = url
        else:
            # online path
            server=self.digilibBaseUrl+"/servlet/Texter?fn="
            metaUrl=server+url.replace("/mpiwg/online","")
            if not metaUrl.endswith("index.meta"):
                metaUrl += "/index.meta"
        logging.debug("METAURL: %s"%metaUrl)
        for cnt in range(num_retries):
            try:
                # patch dirk encoding fehler treten dann nicht mehr auf
                # dom = NonvalidatingReader.parseUri(metaUrl)
                txt=urllib.urlopen(metaUrl).read()
                dom = Parse(txt)
                break
            except:
                logger("ERROR documentViewer (getIndexMata)", logging.INFO,"%s (%s)"%sys.exc_info()[0:2])
                
        if dom is None:
            raise IOError("Unable to read index meta from %s"%(url))
                 
        return dom
    
    def getPresentationInfoXML(self, url):
        """returns dom of info.xml document at url"""
        num_retries = 3
        dom = None
        metaUrl = None
        if url.startswith("http://"):
            # real URL
            metaUrl = url
        else:
            # online path
            server=self.digilibBaseUrl+"/servlet/Texter?fn="
            metaUrl=server+url.replace("/mpiwg/online","")
           
        
        for cnt in range(num_retries):
            try:
                # patch dirk encoding fehler treten dann nicht mehr auf
                # dom = NonvalidatingReader.parseUri(metaUrl)
                txt=urllib.urlopen(metaUrl).read()
                dom = Parse(txt)
                break
            except:
                logger("ERROR documentViewer (getPresentationInfoXML)", logging.INFO,"%s (%s)"%sys.exc_info()[0:2])
                
        if dom is None:
            raise IOError("Unable to read infoXMLfrom %s"%(url))
                 
        return dom
                        
        
    def getAuthinfoFromIndexMeta(self,path,docinfo=None,dom=None,cut=0):
        """gets authorization info from the index.meta file at path or given by dom"""
        logger("documentViewer (getauthinfofromindexmeta)", logging.INFO,"path: %s"%(path))
        
        access = None
        
        if docinfo is None:
            docinfo = {}
            
        if dom is None:
            for x in range(cut):
                path=getParentDir(path)
            dom = self.getIndexMeta(path)
       
        acctype = dom.xpath("//access-conditions/access/@type")
        if acctype and (len(acctype)>0):
            access=acctype[0].value
            if access in ['group', 'institution']:
                access = getTextFromNode(dom.xpath("//access-conditions/access/name")[0]).lower()
            
        docinfo['accessType'] = access
        return docinfo
    
        
    def getBibinfoFromIndexMeta(self,path,docinfo=None,dom=None,cut=0):
        """gets bibliographical info from the index.meta file at path or given by dom"""
        logging.debug("documentViewer (getbibinfofromindexmeta) path: %s"%(path))
        
        if docinfo is None:
            docinfo = {}
        
        if dom is None:
            for x in range(cut):
                path=getParentDir(path)
            dom = self.getIndexMeta(path)
        
        logging.debug("documentViewer (getbibinfofromindexmeta cutted) path: %s"%(path))
        # put in all raw bib fields as dict "bib"
        bib = dom.xpath("//bib/*")
        if bib and len(bib)>0:
            bibinfo = {}
            for e in bib:
                bibinfo[e.localName] = getTextFromNode(e)
            docinfo['bib'] = bibinfo
        
        # extract some fields (author, title, year) according to their mapping
        metaData=self.metadata.main.meta.bib
        bibtype=dom.xpath("//bib/@type")
        if bibtype and (len(bibtype)>0):
            bibtype=bibtype[0].value
        else:
            bibtype="generic"
            
        bibtype=bibtype.replace("-"," ") # wrong typesiin index meta "-" instead of " " (not wrong! ROC)
        docinfo['bib_type'] = bibtype
        bibmap=metaData.generateMappingForType(bibtype)
        # if there is no mapping bibmap is empty (mapping sometimes has empty fields)
        if len(bibmap) > 0 and len(bibmap['author'][0]) > 0:
            try:
                docinfo['author']=getTextFromNode(dom.xpath("//bib/%s"%bibmap['author'][0])[0])
            except: pass
            try:
                docinfo['title']=getTextFromNode(dom.xpath("//bib/%s"%bibmap['title'][0])[0])
            except: pass
            try:
                docinfo['year']=getTextFromNode(dom.xpath("//bib/%s"%bibmap['year'][0])[0])
            except: pass
            logging.debug("documentViewer (getbibinfofromindexmeta) using mapping for %s"%bibtype)
            try:
                docinfo['lang']=getTextFromNode(dom.xpath("//bib/lang")[0])
            except:
                docinfo['lang']=''

        return docinfo
    
    
    def getDocinfoFromTextTool(self, url, dom=None, docinfo=None):
        """parse texttool tag in index meta"""
        logger("documentViewer (getdocinfofromtexttool)", logging.INFO, "url: %s" % (url))
        if docinfo is None:
           docinfo = {}
            
        if docinfo.get('lang', None) is None:
            docinfo['lang'] = '' # default keine Sprache gesetzt
        if dom is None:
            dom = self.getIndexMeta(url)
        
        archivePath = None
        archiveName = None
    
        archiveNames = dom.xpath("//resource/name")
        if archiveNames and (len(archiveNames) > 0):
            archiveName = getTextFromNode(archiveNames[0])
        else:
            logger("documentViewer (getdocinfofromtexttool)", logging.WARNING, "resource/name missing in: %s" % (url))
        
        archivePaths = dom.xpath("//resource/archive-path")
        if archivePaths and (len(archivePaths) > 0):
            archivePath = getTextFromNode(archivePaths[0])
            # clean up archive path
            if archivePath[0] != '/':
                archivePath = '/' + archivePath
            if archiveName and (not archivePath.endswith(archiveName)):
                archivePath += "/" + archiveName
        else:
            # try to get archive-path from url
            logger("documentViewer (getdocinfofromtexttool)", logging.WARNING, "resource/archive-path missing in: %s" % (url))
            if (not url.startswith('http')):
                archivePath = url.replace('index.meta', '')
                
        if archivePath is None:
            # we balk without archive-path
            raise IOError("Missing archive-path (for text-tool) in %s" % (url))
        
        imageDirs = dom.xpath("//texttool/image")
        if imageDirs and (len(imageDirs) > 0):
            imageDir = getTextFromNode(imageDirs[0])
            
        else:
            # we balk with no image tag / not necessary anymore because textmode is now standard
            #raise IOError("No text-tool info in %s"%(url))
            imageDir = ""
            #xquery="//pb"  
            docinfo['imagePath'] = "" # keine Bilder
            docinfo['imageURL'] = ""
            
        if imageDir and archivePath:
            #print "image: ", imageDir, " archivepath: ", archivePath
            imageDir = os.path.join(archivePath, imageDir)
            imageDir = imageDir.replace("/mpiwg/online", '')
            docinfo = self.getDirinfoFromDigilib(imageDir, docinfo=docinfo)
            docinfo['imagePath'] = imageDir
            
            docinfo['imageURL'] = self.digilibBaseUrl + "/servlet/Scaler?fn=" + imageDir
            
        viewerUrls = dom.xpath("//texttool/digiliburlprefix")
        if viewerUrls and (len(viewerUrls) > 0):
            viewerUrl = getTextFromNode(viewerUrls[0])
            docinfo['viewerURL'] = viewerUrl
                   
        textUrls = dom.xpath("//texttool/text")
        if textUrls and (len(textUrls) > 0):
            textUrl = getTextFromNode(textUrls[0])
            if urlparse.urlparse(textUrl)[0] == "": #keine url
                textUrl = os.path.join(archivePath, textUrl) 
            # fix URLs starting with /mpiwg/online
            if textUrl.startswith("/mpiwg/online"):
                textUrl = textUrl.replace("/mpiwg/online", '', 1)
            
            docinfo['textURL'] = textUrl
    
        textUrls = dom.xpath("//texttool/text-url-path")
        if textUrls and (len(textUrls) > 0):
            textUrl = getTextFromNode(textUrls[0])
            docinfo['textURLPath'] = textUrl   
         
        presentationUrls = dom.xpath("//texttool/presentation")
        docinfo = self.getBibinfoFromIndexMeta(url, docinfo=docinfo, dom=dom)   # get info von bib tag
        
        if presentationUrls and (len(presentationUrls) > 0): # ueberschreibe diese durch presentation informationen 
             # presentation url ergiebt sich ersetzen von index.meta in der url der fuer die Metadaten
             # durch den relativen Pfad auf die presentation infos
            presentationPath = getTextFromNode(presentationUrls[0])
            if url.endswith("index.meta"): 
                presentationUrl = url.replace('index.meta', presentationPath)
            else:
                presentationUrl = url + "/" + presentationPath
            docinfo = self.getNumPages(docinfo) #im moment einfach auf eins setzen, navigation ueber die thumbs geht natuerlich nicht    
            docinfo = self.getBibinfoFromTextToolPresentation(presentationUrl, docinfo=docinfo, dom=dom)
    
        docinfo = self.getAuthinfoFromIndexMeta(url, docinfo=docinfo, dom=dom)   # get access info
        
        return docinfo



   
   
    def getBibinfoFromTextToolPresentation(self,url,docinfo=None,dom=None):
        """gets the bibliographical information from the preseantion entry in texttools
        """
        dom=self.getPresentationInfoXML(url)
        try:
            docinfo['author']=getTextFromNode(dom.xpath("//author")[0])
        except:
            pass
        try:
            docinfo['title']=getTextFromNode(dom.xpath("//title")[0])
        except:
            pass
        try:
            docinfo['year']=getTextFromNode(dom.xpath("//date")[0])
        except:
            pass
        return docinfo
    
    def getDocinfoFromImagePath(self,path,docinfo=None,cut=0):
        """path ist the path to the images it assumes that the index.meta file is one level higher."""
        logger("documentViewer (getdocinfofromimagepath)", logging.INFO,"path: %s"%(path))
        if docinfo is None:
            docinfo = {}
        path=path.replace("/mpiwg/online","")
        docinfo['imagePath'] = path
        docinfo=self.getDirinfoFromDigilib(path,docinfo=docinfo,cut=cut)
        
        pathorig=path
        for x in range(cut):       
                path=getParentDir(path)
        logging.error("PATH:"+path)
        imageUrl=self.digilibBaseUrl+"/servlet/Scaler?fn="+path
        docinfo['imageURL'] = imageUrl
        
        #path ist the path to the images it assumes that the index.meta file is one level higher.
        docinfo = self.getBibinfoFromIndexMeta(pathorig,docinfo=docinfo,cut=cut+1)
        docinfo = self.getAuthinfoFromIndexMeta(pathorig,docinfo=docinfo,cut=cut+1)
        return docinfo
    
    
    def getDocinfo(self, mode, url):
        """returns docinfo depending on mode"""
        logger("documentViewer (getdocinfo)", logging.INFO,"mode: %s, url: %s"%(mode,url))
        # look for cached docinfo in session
        if self.REQUEST.SESSION.has_key('docinfo'):
            docinfo = self.REQUEST.SESSION['docinfo']
            # check if its still current
            if docinfo is not None and docinfo.get('mode') == mode and docinfo.get('url') == url:
                logger("documentViewer (getdocinfo)", logging.INFO,"docinfo in session: %s"%docinfo)
                return docinfo
        # new docinfo
        docinfo = {'mode': mode, 'url': url}
        if mode=="texttool": #index.meta with texttool information
            docinfo = self.getDocinfoFromTextTool(url, docinfo=docinfo)
        elif mode=="imagepath":
            docinfo = self.getDocinfoFromImagePath(url, docinfo=docinfo)
        elif mode=="filepath":
            docinfo = self.getDocinfoFromImagePath(url, docinfo=docinfo,cut=1)
        else:
            logger("documentViewer (getdocinfo)", logging.ERROR,"unknown mode!")
            raise ValueError("Unknown mode %s"%(mode))
                        
        logger("documentViewer (getdocinfo)", logging.INFO,"docinfo: %s"%docinfo)
        self.REQUEST.SESSION['docinfo'] = docinfo
        return docinfo
        
        
    def getPageinfo(self, current, start=None, rows=None, cols=None, docinfo=None):
        """returns pageinfo with the given parameters"""
        pageinfo = {}
        current = getInt(current)
        pageinfo['current'] = current
        rows = int(rows or self.thumbrows)
        pageinfo['rows'] = rows
        cols = int(cols or self.thumbcols)
        pageinfo['cols'] = cols
        grpsize = cols * rows
        pageinfo['groupsize'] = grpsize
        start = getInt(start, default=(math.ceil(float(current)/float(grpsize))*grpsize-(grpsize-1)))
        # int(current / grpsize) * grpsize +1))
        pageinfo['start'] = start
        pageinfo['end'] = start + grpsize
        if docinfo is not None:
            np = int(docinfo['numPages'])
            pageinfo['end'] = min(pageinfo['end'], np)
            pageinfo['numgroups'] = int(np / grpsize)
            if np % grpsize > 0:
                pageinfo['numgroups'] += 1

        return pageinfo
                


    def getNumPages(self,docinfo=None):
        """get list of pages from fulltext and put in docinfo"""
        xquery = '//pb'
        text = self.template.fulltextclient.eval("/mpdl/interface/xquery.xql", "document=%s&xquery=%s"%(docinfo['textURLPath'],xquery))
        # TODO: better processing of the page list. do we need the info somewhere else also?
        docinfo['numPages'] = text.count("<pb ")
        return docinfo
       
    def getTextPage(self, mode="text", pn=1, docinfo=None):
        """returns single page from fulltext"""
        pagexml=self.template.fulltextclient.eval("/mpdl/interface/page-fragment.xql", "document=%s&mode=%s&pn=%s"%(docinfo['textURLPath'],mode,pn), outputUnicode=False)
        # post-processing downloaded xml
        pagedom = Parse(pagexml)
        # plain text mode
        if mode == "text":
            # first div contains text
            pagedivs = pagedom.xpath("/div")
            if len(pagedivs) > 0:
                pagenode = pagedivs[0]
                return serializeNode(pagenode)

        # text-with-links mode
        if mode == "textPollux":
            # first div contains text
            pagedivs = pagedom.xpath("/div")
            if len(pagedivs) > 0:
                pagenode = pagedivs[0]
                # check all a-tags
                links = pagenode.xpath("//a")
                for l in links:
                    hrefNode = l.getAttributeNodeNS(None, u"href")
                    if hrefNode:
                        # is link with href
                        href = hrefNode.nodeValue
                        if href.startswith('lt/lex.xql'):
                            # is pollux link
                            selfurl = self.absolute_url()
                            # change href
                            hrefNode.nodeValue = href.replace('lt/lex.xql','%s/head_main_voc'%selfurl)
                            # add target
                            l.setAttributeNS(None, 'target', '_blank')
                return serializeNode(pagenode)
        
        return "no text here"

    
    def changeDocumentViewer(self,title="",digilibBaseUrl=None,thumbrows=2,thumbcols=10,authgroups='mpiwg',RESPONSE=None):
        """init document viewer"""
        self.title=title
        self.digilibBaseUrl = digilibBaseUrl
        self.thumbrows = thumbrows
        self.thumbcols = thumbcols
        self.authgroups = [s.strip().lower() for s in authgroups.split(',')]
        if RESPONSE is not None:
            RESPONSE.redirect('manage_main')
    
    
        
def manage_AddDocumentViewerForm(self):
    """add the viewer form"""
    pt=PageTemplateFile('zpt/addDocumentViewer', globals()).__of__(self)
    return pt()
  
def manage_AddDocumentViewer(self,id,imageScalerUrl="",textServerName="",title="",RESPONSE=None):
    """add the viewer"""
    newObj=documentViewer(id,imageScalerUrl=imageScalerUrl,title=title,textServerName=textServerName)
    self._setObject(id,newObj)
    
    if RESPONSE is not None:
        RESPONSE.redirect('manage_main')


##
## DocumentViewerTemplate class
##
class DocumentViewerTemplate(ZopePageTemplate):
    """Template for document viewer"""
    meta_type="DocumentViewer Template"


def manage_addDocumentViewerTemplateForm(self):
    """Form for adding"""
    pt=PageTemplateFile('zpt/addDocumentViewerTemplate', globals()).__of__(self)
    return pt()

def manage_addDocumentViewerTemplate(self, id='viewer_main', title=None, text=None,
                           REQUEST=None, submit=None):
    "Add a Page Template with optional file content."

    self._setObject(id, DocumentViewerTemplate(id))
    ob = getattr(self, id)
    txt=file(os.path.join(package_home(globals()),'zpt/viewer_main.zpt'),'r').read()
    logging.info("txt %s:"%txt)
    ob.pt_edit(txt,"text/html")
    if title:
        ob.pt_setTitle(title)
    try:
        u = self.DestinationURL()
    except AttributeError:
        u = REQUEST['URL1']
        
    u = "%s/%s" % (u, urllib.quote(id))
    REQUEST.RESPONSE.redirect(u+'/manage_main')
    return ''