--- documentViewer/documentViewer.py	2005/12/18 12:35:02	1.1
+++ documentViewer/documentViewer.py	2011/08/10 19:18:03	1.175.2.23
@@ -1,293 +1,850 @@
-
-genericDigilib="http://nausikaa2.rz-berlin.mpg.de/digitallibrary/"
-
 from OFS.Folder import Folder
 from Products.PageTemplates.ZopePageTemplate import ZopePageTemplate
-from Products.PageTemplates.PageTemplateFile import PageTemplateFile
+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
+#from Ft.Xml import EMPTY_NAMESPACE, Parse 
+#import Ft.Xml.Domlette
 
-import Ft.Xml.XPath
+import xml.etree.ElementTree as ET
 
 import os.path
-import cgi
+import sys
 import urllib
-
-def getTextFromNode(nodename):
-    nodelist=nodename.childNodes
-    rc = ""
-    for node in nodelist:
-        if node.nodeType == node.TEXT_NODE:
-           rc = rc + node.data
-    return rc
-
-import socket
-
-def urlopen(url):
-        """urlopen mit timeout"""
-        socket.setdefaulttimeout(2)
-        ret=urllib.urlopen(url)
-        socket.setdefaulttimeout(5)
-        return ret
+import logging
+import math
+import urlparse 
+import re
+import string
+
+from SrvTxtUtils import getInt, getText, getHttpData
+
+def logger(txt,method,txt2):
+    """logging"""
+    logging.info(txt+ txt2)
+    
+    
+def serializeNode(node, encoding="utf-8"):
+    """returns a string containing node as XML"""
+    s = ET.tostring(node)
+    
+    # 4Suite:
+    #    stream = cStringIO.StringIO()
+    #    Ft.Xml.Domlette.Print(node, stream=stream, encoding=encoding)
+    #    s = stream.getvalue()
+    #    stream.close()
+    return s
+
+def browserCheck(self):
+    """check the browsers request to find out the browser type"""
+    bt = {}
+    ua = self.REQUEST.get_header("HTTP_USER_AGENT")
+    bt['ua'] = ua
+    bt['isIE'] = False
+    bt['isN4'] = False
+    bt['versFirefox']=""
+    bt['versIE']=""
+    bt['versSafariChrome']=""
+    bt['versOpera']=""
     
-def getParamFromDigilib(path,param):
-    """gibt param von dlInfo aus"""
-    imageUrl=genericDigilib+"/dlInfo-xml.jsp?fn="+path
-
+    if string.find(ua, 'MSIE') > -1:
+        bt['isIE'] = True
+    else:
+        bt['isN4'] = (string.find(ua, 'Mozilla/4.') > -1)
+    # Safari oder Chrome identification    
     try:
-        dom = NonvalidatingReader.parseUri(imageUrl)
-    except:
-        return None
-    
-    
-    params=dom.xpath("//document-parameters/parameter[@name='%s']/@value"%param)
-    
-    if params:
-        return params[0].value
-    
-def parseUrlTextTool(url):
-   """parse index meta"""
-    
-   try:
-       dom = NonvalidatingReader.parseUri(url)
-   except:
-       zLOG.LOG("documentViewer (parseUrlTexttool)", zLOG.INFO,"%s (%s)"%sys.exc_info()[0:2])
-       return (None,None,None)
-   
-   archivePaths=dom.xpath("//resource/archive-path")
-   
-   if archivePaths and (len(archivePaths)>0):
-       archivePath=getTextFromNode(archivePaths[0])
-   else:
-       archivePath=None
-   
-    
-   images=dom.xpath("//texttool/image")
-   
-   if images and (len(images)>0):
-       image=getTextFromNode(images[0])
-   else:
-       image=None
-       
-   if image and archivePath:
-       image=os.path.join(archivePath,image)
-       image=image.replace("/mpiwg/online",'')
-       pt=getParamFromDigilib(image,'pt')
-
-   else:
-       image=None
-       
-   viewerUrls=dom.xpath("//texttool/digiliburlprefix")
-   
-   if viewerUrls and (len(viewerUrls)>0):
-       viewerUrl=getTextFromNode(viewerUrls[0])
-   else:
-       viewerUrl=None
-   
-   
-   textUrls=dom.xpath("//texttool/text")
-   
-   if textUrls and (len(textUrls)>0):
-       textUrl=getTextFromNode(textUrls[0])
-   else:
-       textUrl=None
-   return viewerUrl,(image,pt),textUrl
-
-
-class documentViewer(ZopePageTemplate):
+        nav = ua[string.find(ua, '('):]
+        nav1=ua[string.find(ua,')'):]
+        nav2=nav1[string.find(nav1,'('):]
+        nav3=nav2[string.find(nav2,')'):]
+        ie = string.split(nav, "; ")[1]
+        ie1 =string.split(nav1, " ")[2]
+        ie2 =string.split(nav3, " ")[1]
+        ie3 =string.split(nav3, " ")[2]
+        if string.find(ie3, "Safari") >-1:
+            bt['versSafariChrome']=string.split(ie2, "/")[1]
+    except: pass
+    # IE identification
+    try:
+        nav = ua[string.find(ua, '('):]
+        ie = string.split(nav, "; ")[1]
+        if string.find(ie, "MSIE") > -1:
+            bt['versIE'] = string.split(ie, " ")[1]
+    except:pass
+    # Firefox identification
+    try:
+        nav = ua[string.find(ua, '('):]
+        nav1=ua[string.find(ua,')'):]
+        if string.find(ie1, "Firefox") >-1:
+            nav5= string.split(ie1, "/")[1]
+            logging.debug("FIREFOX: %s"%(nav5))
+            bt['versFirefox']=nav5[0:3]                   
+    except:pass
+    #Opera identification
+    try:
+        if string.find(ua,"Opera") >-1:
+            nav = ua[string.find(ua, '('):]
+            nav1=nav[string.find(nav,')'):]
+            bt['versOpera']=string.split(nav1,"/")[2]
+    except:pass
+    
+    bt['isMac'] = string.find(ua, 'Macintosh') > -1
+    bt['isWin'] = string.find(ua, 'Windows') > -1
+    bt['isIEWin'] = bt['isIE'] and bt['isWin']
+    bt['isIEMac'] = bt['isIE'] and bt['isMac']
+    bt['staticHTML'] = False
+
+    return bt
+
+def getParentPath(path, cnt=1):
+    """returns pathname shortened by cnt"""
+    # make sure path doesn't end with /
+    path = path.rstrip('/')
+    # split by /, shorten, and reassemble
+    return '/'.join(path.split('/')[0:-cnt])
+
+
+##
+## documentViewer class
+##
+class documentViewer(Folder):
     """document viewer"""
-
     meta_type="Document viewer"
     
     security=ClassSecurityInfo()
-    manage_options=ZopePageTemplate.manage_options+(
+    manage_options=Folder.manage_options+(
         {'label':'main config','action':'changeDocumentViewerForm'},
         )
+    
+    metadataService = None
+    """MetaDataFolder instance"""
+
+    # templates and forms
+    viewer_main = PageTemplateFile('zpt/viewer_main', globals())
+    toc_thumbs = PageTemplateFile('zpt/toc_thumbs', globals())
+    toc_text = PageTemplateFile('zpt/toc_text', globals())
+    toc_figures = PageTemplateFile('zpt/toc_figures', globals())
+    page_main_images = PageTemplateFile('zpt/page_main_images', globals())
+    page_main_double = PageTemplateFile('zpt/page_main_double', globals())
+    page_main_text = PageTemplateFile('zpt/page_main_text', globals())
+    page_main_text_dict = PageTemplateFile('zpt/page_main_text_dict', globals())
+    page_main_gis =PageTemplateFile ('zpt/page_main_gis', globals())
+    page_main_xml = PageTemplateFile('zpt/page_main_xml', globals())
+    page_main_pureXml = PageTemplateFile('zpt/page_main_pureXml', 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())
 
-    _default_content_fn = os.path.join(package_home(globals()),'zpt','documentViewer_template.zpt')
     
-    def __init__(self,id,imageViewerUrl,title=""):
+    def __init__(self,id,imageScalerUrl=None,textServerName=None,title="",digilibBaseUrl=None,thumbcols=2,thumbrows=5,authgroups="mpiwg"):
         """init document viewer"""
         self.id=id
         self.title=title
-        self.imageViewerUrl=imageViewerUrl
-        
-    security.declareProtected('View management screens','changeDocumentViewerForm')    
-    def changeDocumentViewerForm(self):
-        """change it"""
-        pt=PageTemplateFile(os.path.join(package_home(globals()),'zpt','changeDocumentViewer.zpt')).__of__(self)
-        return pt()
-  
-  
-    def changeDocumentViewer(self,imageViewerUrl,title="",RESPONSE=None):
-        """init document viewer"""
-        self.title=title
-        self.imageViewerUrl=imageViewerUrl
+        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:
+            import MpdlXmlTextServer
+            textServer = MpdlXmlTextServer.MpdlXmlTextServer(id='fulltextclient',serverName=textServerName)
+            #templateFolder['fulltextclient'] = xmlRpcClient
+            templateFolder._setObject('fulltextclient',textServer)
+        except Exception, e:
+            logging.error("Unable to create MpdlXmlTextServer 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))
+            
+        try:
+            # assume MetaDataFolder instance is called metadata 
+            self.metadataService = getattr(self, 'metadata')
+        except Exception, e:
+            logging.error("Unable to find MetaDataFolder 'metadata': "+str(e))
+            
+        if digilibBaseUrl is not None:
+            self.digilibBaseUrl = digilibBaseUrl
+            
         
-        if RESPONSE is not None:
-            RESPONSE.redirect('manage_main')
-    
+    # proxy text server methods to fulltextclient
+    def getTextPage(self, **args):
+        """get page"""
+        return self.template.fulltextclient.getTextPage(**args)
+
+    def getOrigPages(self, **args):
+        """get page"""
+        return self.template.fulltextclient.getOrigPages(**args)
+    
+    def getOrigPagesNorm(self, **args):
+        """get page"""
+        return self.template.fulltextclient.getOrigPagesNorm(**args)
+
+    def getQuery(self, **args):
+        """get query in search"""
+        return self.template.fulltextclient.getQuery(**args)
+     
+    def getSearch(self, **args):
+        """get search"""
+        return self.template.fulltextclient.getSearch(**args)
+    
+    def getGisPlaces(self, **args):
+        """get gis places"""
+        return self.template.fulltextclient.getGisPlaces(**args)
+ 
+    def getAllGisPlaces(self, **args):
+        """get all gis places """
+        return self.template.fulltextclient.getAllGisPlaces(**args)
+       
+    def getTranslate(self, **args):
+        """get translate"""
+        return self.template.fulltextclient.getTranslate(**args)
+
+    def getLemma(self, **args):
+        """get lemma"""
+        return self.template.fulltextclient.getLemma(**args)
+
+    def getLemmaQuery(self, **args):
+        """get query"""
+        return self.template.fulltextclient.getLemmaQuery(**args)
+
+    def getLex(self, **args):
+        """get lex"""
+        return self.template.fulltextclient.getLex(**args)
+
+    def getToc(self, **args):
+        """get toc"""
+        return self.template.fulltextclient.getToc(**args)
+
+    def getTocPage(self, **args):
+        """get tocpage"""
+        return self.template.fulltextclient.getTocPage(**args)
+
     
-    def imageLink(self,nr):
-        """link hinter den images"""
-        paramsTmp=cgi.parse_qs(self.REQUEST['QUERY_STRING'])
-        params={}
-        for x in paramsTmp.iteritems():
-                params[x[0]]=x[1][0]
-    
-        params['pn']=nr
-        newUrl=self.REQUEST['URL']+"?"+urllib.urlencode(params)
-        return newUrl
+    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")
+        logging.debug("documentViewer (index) mode: %s url:%s start:%s pn:%s"%(mode,url,start,pn))
         
-    def thumbruler(self,cols,rows,start,maximum):
-        """ruler for thumbs"""
-        ret=""
-        paramsTmp=cgi.parse_qs(self.REQUEST['QUERY_STRING'])
-        params={}
-        for x in paramsTmp.iteritems():
-
-            if not x[0]=="start":
-                params[x[0]]=x[1][0]
-
-        newUrlSelect=self.REQUEST['URL']+"?"+urllib.urlencode(params)    
-        if start>0:
-            newStart=max(start-cols*rows,0)
-            params['start']=newStart
-            newUrl=self.REQUEST['URL']+"?"+urllib.urlencode(params)
-            ret+="""<a href="%s">prev</a>"""%newUrl
-
-
-        ret+="""<select onChange="location.href='%s&start='+this.options[this.selectedIndex].value" """%newUrlSelect
-        nr,rest=divmod(maximum,cols*rows)
-        if rest > 0:
-            nr+=1
-        for i in range(nr):
-            nr=i*cols*rows
-           
-            if (start >= nr) and (start < nr+cols*rows):  
-                ret+="""<option value="%s" selected>%s</option>"""%(nr,nr)
+        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)
+        pageinfo = self.getPageinfo(start=start,current=pn, docinfo=docinfo)
+        ''' ZDES '''
+        pt = getattr(self.template, 'thumbs_main_rss')
+        
+        if viewMode=="auto": # automodus gewaehlt
+            if docinfo.has_key("textURL") or docinfo.get('textURLPath',None): #texturl gesetzt und textViewer konfiguriert
+                viewMode="text"
             else:
-                ret+="""<option value="%s">%s</option>"""%(nr,nr)
-        ret+="</select>"
-        
-        if start<maximum:
-            newStart=min(start+cols*rows,maximum)
-            params['start']=newStart
-            newUrl=self.REQUEST['URL']+"?"+urllib.urlencode(params)
-            ret+="""<a href="%s">next</a>"""%newUrl
+                viewMode="images"
+               
+        return pt(docinfo=docinfo,pageinfo=pageinfo,viewMode=viewMode)
+
+  
+    security.declareProtected('View','index_html')
+    def index_html(self,url,mode="texttool",viewMode="auto",viewType=None,tocMode="thumbs",start=1,pn=1):
+        """
+        view page
+        @param url: url which contains display information
+        @param mode: defines how to access the document behind url 
+        @param viewMode: 'images': display images, 'text': display text, default is 'auto'
+        @param viewType: sub-type of viewMode, e.g. 'dict' for viewMode='text'
+        @param tocMode: type of 'table of contents' for navigation (thumbs, text, figures, none)
+        """
         
-        return ret
+        logging.debug("documentViewer(index_html) mode=%s url=%s viewMode=%s viewType=%s start=%s pn=%s"%(mode,url,viewMode,viewType,start,pn))
         
-    def textToolThumb(self,url,start=0):
-        """understands the texttool format
-        @param url: url to index.meta with texttool tag
-        """
-        (viewerUrl,imagepath,textpath)=parseUrlTextTool(url)
+        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://digilib.mpiwg-berlin.mpg.de/digitallibrary"
+            
+        docinfo = self.getDocinfo(mode=mode,url=url)
         
-        imageUrl=genericDigilib+"/servlet/Scaler?fn=%s"%imagepath[0]
+        if tocMode != "thumbs":
+            # get table of contents
+            docinfo = self.getToc(mode=tocMode, docinfo=docinfo)
+
+        # auto viewMode: text if there is a text else images
+        if viewMode=="auto": 
+            if docinfo.get('textURL', None) or docinfo.get('textURLPath', None): 
+                viewMode = "text"
+                viewType = "dict"
+            else:
+                viewMode = "images"
+                
+        elif viewMode == "text_dict":
+            # legacy fix
+            viewMode = "text"
+            viewType = "dict"
+            
+        # stringify viewType
+        if isinstance(viewType, list):
+            viewType = ','.join([t for t in viewType if t])
+                        
+        pageinfo = self.getPageinfo(start=start, current=pn, docinfo=docinfo, viewMode=viewMode, viewType=viewType, tocMode=tocMode)
+                    
+        # get template /template/viewer_$viewMode
+        pt = getattr(self.template, 'viewer_%s'%viewMode, None)
+        if pt is None:
+            logging.error("No template for viewMode=%s!"%viewMode)
+            # TODO: error page?
+            return "No template for viewMode=%s!"%viewMode
         
-        pt=PageTemplateFile(os.path.join(package_home(globals()),'zpt','thumbs.zpt')).__of__(self)
-        return pt(imageUrl=imageUrl,pt=imagepath[1],start=start)
+        # and execute with parameters
+        return pt(docinfo=docinfo, pageinfo=pageinfo)
+  
+    def generateMarks(self,mk):
+        ret=""
+        if mk is None:
+            return ""
+        if not isinstance(mk, list):
+            mk=[mk]
+        for m in mk:
+            ret+="mk=%s"%m
+        return ret
     
-    def text(self,mode,url,pn):
-        """give text"""
-        if mode=="texttool": #index.meta with texttool information
-            (viewerUrl,imagepath,textpath)=parseUrlTextTool(url)
-        
-        print textpath
-        try:
-            dom = NonvalidatingReader.parseUri(textpath)
-        except:
-            return None
     
-        list=[]
-        nodes=dom.xpath("//pb")
+    def getBrowser(self):
+        """getBrowser the version of browser """
+        bt = browserCheck(self)
+        logging.debug("BROWSER VERSION: %s"%(bt))
+        return bt
+        
+    def findDigilibUrl(self):
+        """try to get the digilib URL from zogilib"""
+        url = self.template.zogilib.getDLBaseUrl()
+        return url
+
+    def getDocumentViewerURL(self):
+        """returns the URL of this instance"""
+        return self.absolute_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 getParams(self, param=None, val=None, params=None):
+        """returns dict with URL parameters.
+        
+        Takes URL parameters and additionally param=val or dict params.
+        Deletes key if value is None."""
+        # copy existing request params
+        newParams=self.REQUEST.form.copy()
+        # change single param
+        if param is not None:
+            if val is None:
+                if newParams.has_key(param):
+                    del newParams[param]
+            else:
+                newParams[param] = str(val)
+                
+        # change more params
+        if params is not None:
+            for k in params.keys():
+                v = params[k]
+                if v is None:
+                    # val=None removes param
+                    if newParams.has_key(k):
+                        del newParams[k]
+                        
+                else:
+                    newParams[k] = v
+                    
+        return newParams
+    
+    def getLink(self, param=None, val=None, params=None, baseUrl=None, paramSep='&'):
+        """returns URL to documentviewer with parameter param set to val or from dict params"""
+        urlParams = self.getParams(param=param, val=val, params=params)
+        # quote values and assemble into query string (not escaping '/')
+        ps = paramSep.join(["%s=%s"%(k,urllib.quote_plus(unicode(v),'/')) for (k, v) in urlParams.items()])
+        if baseUrl is None:
+            baseUrl = self.getDocumentViewerURL()
+            
+        url = "%s?%s"%(baseUrl, ps)
+        return url
 
-        node=nodes[int(pn)-1]
-        
-        p=node
-        
-        while p.tagName!="p":
-            p=p.parentNode
-        
-        
-        endNode=nodes[int(pn)]
-        
-        
-        e=endNode
-        
-        while e.tagName!="p":
-            e=e.parentNode
-        
-        
-        next=node.parentNode
-        
-        #sammle s
-        while next and (next!=endNode.parentNode):
-            list.append(next)    
-            next=next.nextSibling    
-        list.append(endNode.parentNode)
-        
-        if p==e:# beide im selben paragraphen
-        
-    else:
-            next=p
-            while next!=e:
-                print next,e
-                list.append(next)
-                next=next.nextSibling
-            
-        for x in list:
-            PrettyPrint(x)
-
-        return list
-    
-    def image(self,mode,url,pn):
-        """give image out"""
-        if mode=="texttool": #index.meta with texttool information
-            (viewerUrl,imagepath,textpath)=parseUrlTextTool(url)
-            url=viewerUrl+"pn=%s&fn=%s"%(pn,imagepath[0])
-            ret="""<iframe height="100%%" width="100%%" src="%s"/>"""%url
-            return url
-        
-    def thumbs(self,mode,url,start):
-        """give thumbs out"""
-        if mode=="texttool": #index.meta with texttool information
-            return self.textToolThumb(url,int(start))
+    def getLinkAmp(self, param=None, val=None, params=None, baseUrl=None):
+        """link to documentviewer with parameter param set to val"""
+        return self.getLink(param, val, params, baseUrl, '&amp;')
+    
+    
+    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)
+        logging.debug("documentViewer (accessOK) access type %s"%access)
+        if access == 'free':
+            logging.debug("documentViewer (accessOK) access is free")
+            return True
+        
+        elif access is None or access in self.authgroups:
+            # only local access -- only logged in users
+            user = getSecurityManager().getUser()
+            logging.debug("documentViewer (accessOK) user=%s ip=%s"%(user,self.REQUEST.getClientAddr()))
+            if user is not None:
+                #print "user: ", user
+                return (user.getUserName() != "Anonymous User")
+            else:
+                return False
         
-    security.declareProtected('View','index_html')
+        logging.error("documentViewer (accessOK) unknown access type %s"%access)
+        return False
     
+
+
+    def getDocinfo(self, mode, url):
+        """returns docinfo depending on mode"""
+        logging.debug("getDocinfo: 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', None) == mode and docinfo.get('url', None) == url:
+                logging.debug("getDocinfo: docinfo in session. keys=%s"%docinfo.keys())
+                return docinfo
+            
+        # new docinfo
+        docinfo = {'mode': mode, 'url': url}
+        # add self url
+        docinfo['viewerUrl'] = self.getDocumentViewerURL()
+        docinfo['digilibBaseUrl'] = self.digilibBaseUrl
+        # get index.meta DOM
+        docUrl = None
+        metaDom = None
+        if mode=="texttool": 
+            # url points to document dir or index.meta
+            metaDom = self.metadataService.getDomFromPathOrUrl(url)
+            docUrl = url.replace('/index.meta', '')
+            if metaDom is None:
+                raise IOError("Unable to find index.meta for mode=texttool!")
+
+        elif mode=="imagepath":
+            # url points to folder with images, index.meta optional
+            # asssume index.meta in parent dir
+            docUrl = getParentPath(url)
+            metaDom = self.metadataService.getDomFromPathOrUrl(docUrl)
+
+        elif mode=="filepath":
+            # url points to image file, index.meta optional
+            # asssume index.meta is two path segments up
+            docUrl = getParentPath(url, 2)
+            metaDom = self.metadataService.getDomFromPathOrUrl(docUrl)
+
+        else:
+            logging.error("documentViewer (getdocinfo) unknown mode: %s!"%mode)
+            raise ValueError("Unknown mode %s! Has to be one of 'texttool','imagepath','filepath'."%(mode))
+        
+        docinfo['documentUrl'] = docUrl
+        # process index.meta contents
+        if metaDom is not None and metaDom.tag == 'resource':
+            # document directory name and path
+            resource = self.metadataService.getResourceData(dom=metaDom)
+            if resource:
+                docinfo = self.getDocinfoFromResource(docinfo, resource)
+
+            # texttool info
+            texttool = self.metadataService.getTexttoolData(dom=metaDom)
+            if texttool:
+                docinfo = self.getDocinfoFromTexttool(docinfo, texttool)
+            
+            # bib info
+            bib = self.metadataService.getBibData(dom=metaDom)
+            if bib:
+                docinfo = self.getDocinfoFromBib(docinfo, bib)
+            else:
+                # no bib - try info.xml
+                docinfo = self.getDocinfoFromPresentationInfoXml(docinfo)
+                
+            # auth info
+            access = self.metadataService.getAccessData(dom=metaDom)
+            if access:
+                docinfo = self.getDocinfoFromAccess(docinfo, access)
+
+            # attribution info
+            attribution = self.metadataService.getAttributionData(dom=metaDom)
+            if attribution:
+                logging.debug("getDocinfo: attribution=%s"%repr(attribution))
+                docinfo['attribution'] = attribution
+                #docinfo = self.getDocinfoFromAccess(docinfo, access)
+
+            # copyright info
+            copyright = self.metadataService.getCopyrightData(dom=metaDom)
+            if copyright:
+                logging.debug("getDocinfo: copyright=%s"%repr(copyright))
+                docinfo['copyright'] = copyright
+                #docinfo = self.getDocinfoFromAccess(docinfo, access)
+
+        # image path
+        if mode != 'texttool':
+            # override image path from texttool with url
+            docinfo['imagePath'] = url.replace('/mpiwg/online/', '', 1)
+
+            
+
+        # number of images from digilib
+        if docinfo.get('imagePath', None):
+            docinfo['imageURL'] = self.digilibBaseUrl + "/servlet/Scaler?fn=" + docinfo['imagePath']
+            docinfo = self.getDocinfoFromDigilib(docinfo, docinfo['imagePath'])
+
+        logging.debug("documentViewer (getdocinfo) docinfo: keys=%s"%docinfo.keys())
+        #logging.debug("documentViewer (getdocinfo) docinfo: %s"%docinfo)
+        # store in session
+        self.REQUEST.SESSION['docinfo'] = docinfo
+        return docinfo
+
+    def getDocinfoFromResource(self, docinfo, resource):
+        """reads contents of resource element into docinfo"""
+        docName = resource.get('name', None)
+        docinfo['documentName'] = docName
+        docPath = resource.get('archive-path', None)
+        if docPath:
+            # clean up document path
+            if docPath[0] != '/':
+                docPath = '/' + docPath
+                
+            if docName and (not docPath.endswith(docName)):
+                docPath += "/" + docName
+            
+        else:
+            # use docUrl as docPath
+            docUrl = docinfo['documentURL']
+            if not docUrl.startswith('http:'):
+                docPath = docUrl
+        if docPath:
+            # fix URLs starting with /mpiwg/online
+            docPath = docPath.replace('/mpiwg/online', '', 1)
+
+        docinfo['documentPath'] = docPath
+        return docinfo
+
+    def getDocinfoFromTexttool(self, docinfo, texttool):
+        """reads contents of texttool element into docinfo"""
+        # image dir
+        imageDir = texttool.get('image', None)
+        docPath = docinfo.get('documentPath', None)
+        if imageDir and docPath:
+            #print "image: ", imageDir, " archivepath: ", archivePath
+            imageDir = os.path.join(docPath, imageDir)
+            imageDir = imageDir.replace('/mpiwg/online', '', 1)
+            docinfo['imagePath'] = imageDir
+        
+        # old style text URL
+        textUrl = texttool.get('text', None)
+        if textUrl and docPath:
+            if urlparse.urlparse(textUrl)[0] == "": #keine url
+                textUrl = os.path.join(docPath, textUrl) 
+            
+            docinfo['textURL'] = textUrl
     
-    def index_html(self,mode,url,start=0,pn=0):
-        '''
-        view it
-        @param mode: defines which type of document is behind url
-        @param url: url which contains display information
-        '''
+        # new style text-url-path
+        textUrl = texttool.get('text-url-path', None)
+        if textUrl:
+            docinfo['textURLPath'] = textUrl
+            
+        # page flow
+        docinfo['pageFlow'] = texttool.get('page-flow', 'ltr')
+            
+        # odd pages are left
+        docinfo['oddPage'] = texttool.get('odd-scan-position', 'left')
+            
+        # number of title page (0: not defined)
+        docinfo['titlePage'] = texttool.get('title-scan-no', 0)
+            
+        # old presentation stuff
+        presentation = texttool.get('presentation', None)
+        if presentation and docPath:
+            if presentation.startswith('http:'):
+                docinfo['presentationUrl'] = presentation
+            else:
+                docinfo['presentationUrl'] = os.path.join(docPath, presentation)
+            
         
-    
-        pt=PageTemplateFile(os.path.join(package_home(globals()),'zpt','documentViewer_template.zpt')).__of__(self)
-        return pt(mode=mode,url=url,start=start,pn=pn)
+        return docinfo
+
+    def getDocinfoFromBib(self, docinfo, bib):
+        """reads contents of bib element into docinfo"""
+        logging.debug("getDocinfoFromBib bib=%s"%repr(bib))
+        # put all raw bib fields in dict "bib"
+        docinfo['bib'] = bib
+        bibtype = bib.get('@type', None)
+        docinfo['bibType'] = bibtype
+        # also store DC metadata for convenience
+        dc = self.metadataService.getDCMappedData(bib)
+        docinfo['creator'] = dc.get('creator',None)
+        docinfo['title'] = dc.get('title',None)
+        docinfo['date'] = dc.get('date',None)
+        return docinfo
+            
+    def getDocinfoFromAccess(self, docinfo, acc):
+        """reads contents of access element into docinfo"""
+        #TODO: also read resource type
+        logging.debug("getDocinfoFromAccess acc=%s"%repr(acc))
+        try:
+            acctype = acc['@attr']['type']
+            if acctype:
+                access=acctype
+                if access in ['group', 'institution']:
+                    access = acc['name'].lower()
+                
+                docinfo['accessType'] = access
+
+        except:
+            pass
         
+        return docinfo
+
+    def getDocinfoFromDigilib(self, docinfo, path):
+        infoUrl=self.digilibBaseUrl+"/dirInfo-xml.jsp?mo=dir&fn="+path
+        # fetch data
+        txt = getHttpData(infoUrl)
+        if not txt:
+            logging.error("Unable to get dir-info from %s"%(infoUrl))
+            return docinfo
+
+        dom = ET.fromstring(txt)
+        size = getText(dom.find("size"))
+        logging.debug("getDocinfoFromDigilib: size=%s"%size)
+        if size:
+            docinfo['numPages'] = int(size)
+        else:
+            docinfo['numPages'] = 0
+            
+        # TODO: produce and keep list of image names and numbers
+        return docinfo
+            
+            
+    def getDocinfoFromPresentationInfoXml(self,docinfo):
+        """gets DC-like bibliographical information from the presentation entry in texttools"""
+        url = docinfo.get('presentationUrl', None)
+        if not url:
+            logging.error("getDocinfoFromPresentation: no URL!")
+            return docinfo
+        
+        dom = None
+        metaUrl = None
+        if url.startswith("http://"):
+            # real URL
+            metaUrl = url
+        else:
+            # online path
+            
+            server=self.digilibBaseUrl+"/servlet/Texter?fn="
+            metaUrl=server+url
         
+        txt=getHttpData(metaUrl)
+        if txt is None:
+            logging.error("Unable to read info.xml from %s"%(url))
+            return docinfo
+            
+        dom = ET.fromstring(txt)
+        docinfo['creator']=getText(dom.find(".//author"))
+        docinfo['title']=getText(dom.find(".//title"))
+        docinfo['date']=getText(dom.find(".//date"))
+        return docinfo
+    
+
+    def getPageinfo(self, current, start=None, rows=None, cols=None, docinfo=None, viewMode=None, viewType=None, tocMode=None):
+        """returns pageinfo with the given parameters"""
+        pageinfo = {}
+        pageinfo['viewMode'] = viewMode
+        pageinfo['viewType'] = viewType
+        pageinfo['tocMode'] = tocMode
+
+        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
+        # is start is empty use one around current
+        start = getInt(start, default=(math.ceil(float(current)/float(grpsize))*grpsize-(grpsize-1)))
+        # int(current / grpsize) * grpsize +1))
+        pageinfo['start'] = start
+        pn = self.REQUEST.get('pn','1')
+        pageinfo['pn'] = pn
+        np = int(docinfo.get('numPages', 0))
+        if np == 0:
+            # numPages unknown - maybe we can get it from text page
+            if docinfo.get('textURLPath', None):
+                # cache text page as well
+                pageinfo['textPage'] = self.getTextPage(mode=viewType, pn=pn, docinfo=docinfo, pageinfo=pageinfo)
+                np = int(docinfo.get('numPages', 0))
+                
+        pageinfo['numgroups'] = int(np / grpsize)
+        if np % grpsize > 0:
+            pageinfo['numgroups'] += 1
+
+        pageFlowLtr = docinfo.get('pageFlow', 'ltr') != 'rtl'
+        oddScanLeft = docinfo.get('oddPage', 'left') != 'right'
+        # add zeroth page for two columns
+        pageZero = (cols == 2 and (pageFlowLtr != oddScanLeft))
+        pageinfo['pageZero'] = pageZero
+        pageinfo['pageList'] = self.getPageList(start=start, rows=rows, cols=cols, pageFlowLtr=pageFlowLtr, pageZero=pageZero, minIdx=1, maxIdx=np)
+                
+        pageinfo['characterNormalization'] = self.REQUEST.get('characterNormalization','reg')
+        pageinfo['query'] = self.REQUEST.get('query','') 
+        pageinfo['queryType'] = self.REQUEST.get('queryType','')
+        pageinfo['querySearch'] =self.REQUEST.get('querySearch', 'fulltext')
+        pageinfo['highlightQuery'] = self.REQUEST.get('highlightQuery','')
+        pageinfo['tocPageSize'] = getInt(self.REQUEST.get('tocPageSize', 30))
+        pageinfo['queryPageSize'] = getInt(self.REQUEST.get('queryPageSize', 10))
+        pageinfo['tocPN'] = getInt(self.REQUEST.get('tocPN', '1'))
+        pageinfo['searchPN'] = getInt(self.REQUEST.get('searchPN','1'))
+        
+        # limit tocPN
+        if 'tocSize_%s'%tocMode in docinfo:
+            tocSize = docinfo['tocSize_%s'%tocMode]
+            tocPageSize = pageinfo['tocPageSize']
+            # cached toc           
+            if tocSize%tocPageSize>0:
+                tocPages=tocSize/tocPageSize+1
+            else:
+                tocPages=tocSize/tocPageSize
+                
+            pageinfo['tocPN'] = min(tocPages,pageinfo['tocPN'])
+            
+        return pageinfo
+
+
+    def getPageList(self, start=None, rows=None, cols=None, pageFlowLtr=True, pageZero=False, minIdx=1, maxIdx=0):
+        """returns array of page informations for one screenfull of thumbnails"""
+        if maxIdx == 0:
+            maxIdx = start + rows * cols
+
+        pages = []
+        if pageZero and start == 1:
+            # correct beginning
+            idx = 0
+        else:
+            idx = start
+            
+        for r in range(rows):
+            row = []
+            for c in range(cols):
+                if idx < minIdx or idx > maxIdx:
+                    page = {'idx':None}
+                else:
+                    page = {'idx':idx}
+                    
+                idx += 1
+                if pageFlowLtr:
+                    row.append(page)
+                else:
+                    row.insert(0, page) 
+                
+            pages.append(row)
+            
+        logging.debug("getPageList returns=%s"%(pages))
+        return pages
         
-#    security.declareProtected('View management screens','renameImageForm')
 
+    security.declareProtected('View management screens','changeDocumentViewerForm')    
+    changeDocumentViewerForm = PageTemplateFile('zpt/changeDocumentViewer', globals())
+    
+    def changeDocumentViewer(self,title="",digilibBaseUrl=None,thumbrows=2,thumbcols=5,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(',')]
+        try:
+            # assume MetaDataFolder instance is called metadata 
+            self.metadataService = getattr(self, 'metadata')
+        except Exception, e:
+            logging.error("Unable to find MetaDataFolder 'metadata': "+str(e))
+
+        if RESPONSE is not None:
+            RESPONSE.redirect('manage_main')
+        
 def manage_AddDocumentViewerForm(self):
     """add the viewer form"""
-    pt=PageTemplateFile(os.path.join(package_home(globals()),'zpt','addDocumentViewer.zpt')).__of__(self)
+    pt=PageTemplateFile('zpt/addDocumentViewer', globals()).__of__(self)
     return pt()
   
-def manage_AddDocumentViewer(self,id,imageViewerUrl="",title="",RESPONSE=None):
+def manage_AddDocumentViewer(self,id,imageScalerUrl="",textServerName="",title="",RESPONSE=None):
     """add the viewer"""
-    newObj=documentViewer(id,imageViewerUrl,title)
+    newObj=documentViewer(id,imageScalerUrl=imageScalerUrl,title=title,textServerName=textServerName)
     self._setObject(id,newObj)
     
     if RESPONSE is not None:
         RESPONSE.redirect('manage_main')
-    
\ No newline at end of file
+
+## 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 ''
+
+
+