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 import EMPTY_NAMESPACE, Parse
from Ft.Xml.Domlette import PrettyPrint, Print
import os.path
import sys
import urllib
import urllib2
import logging
import math
import urlparse 
import cStringIO

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])
        

def getHttpData(url, data=None, num_tries=3, timeout=10):
    """returns result from url+data HTTP request"""
    # we do GET (by appending data to url)
    if isinstance(data, str) or isinstance(data, unicode):
        # if data is string then append
        url = "%s?%s"%(url,data)
    elif isinstance(data, dict) or isinstance(data, list) or isinstance(data, tuple):
        # urlencode
        url = "%s?%s"%(url,urllib.urlencode(data))
    
    response = None
    errmsg = None
    for cnt in range(num_tries):
        try:
            logging.debug("getHttpData(#%s %ss) url=%s"%(cnt+1,timeout,url))
            if sys.version_info < (2, 6):
                # set timeout on socket -- ugly :-(
                import socket
                socket.setdefaulttimeout(float(timeout))
                response = urllib2.urlopen(url)
            else:
                response = urllib2.urlopen(url,timeout=float(timeout))
            # check result?
            break
        except urllib2.HTTPError, e:
            logging.error("getHttpData: HTTP error(%s): %s"%(e.code,e))
            errmsg = str(e)
            # stop trying
            break
        except urllib2.URLError, e:
            logging.error("getHttpData: URLLIB error(%s): %s"%(e.reason,e))
            errmsg = str(e)
            # stop trying
            #break

    if response is not None:
        data = response.read()
        response.close()
        return data
    
    raise IOError("ERROR fetching HTTP data from %s: %s"%(url,errmsg))
    #return None



##
## documentViewer class
##
class documentViewer(Folder):
    """document viewer"""
    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())
    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_text = PageTemplateFile('zpt/page_main_text', globals())
    page_main_text_dict = PageTemplateFile('zpt/page_main_text_dict', globals())
    page_main_xml = PageTemplateFile('zpt/page_main_xml', 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=5,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:
            import MpdlXmlTextServer
            textServer = MpdlXmlTextServer(id='fulltextclient')
            #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))
        
        
    # proxy text server methods to fulltextclient
    def getTextPage(self, **args):
        """get page"""
        return self.template.fulltextclient.getTextPage(**args)

    def getQuery(self, **args):
        """get query"""
        return self.template.fulltextclient.getQuery(**args)

    def getSearch(self, **args):
        """get search"""
        return self.template.fulltextclient.getSearch(**args)

    def getNumPages(self, **args):
        """get numpages"""
        return self.template.fulltextclient.getNumPages(**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 getToc(self, **args):
        """get toc"""
        return self.template.fulltextclient.getToc(**args)

    def getTocPage(self, **args):
        """get tocpage"""
        return self.template.fulltextclient.getTocPage(**args)

    
    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.has_key("textURL") or docinfo.has_key('textURLPath'): #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",tocMode="thumbs",start=None,pn=1,mk=None, query=None, querySearch=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 auto (text,images or auto)
        @param tocMode: type of 'table of contents' for navigation (thumbs, text, figures, none)
        @param querySearch: type of different search modes (fulltext, fulltextMorph, xpath, xquery, ftIndex, ftIndexMorph, fulltextMorphLemma)
        '''
        
        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)
        
        
        if tocMode != "thumbs":
            # get table of contents
            docinfo = self.getToc(mode=tocMode, docinfo=docinfo)
            
        if viewMode=="auto": # automodus gewaehlt
            if docinfo.has_key("textURL") or docinfo.has_key('textURLPath'): #texturl gesetzt und textViewer konfiguriert
                viewMode="text_dict"
            else:
                viewMode="images"
                
        pageinfo = self.getPageinfo(start=start,current=pn,docinfo=docinfo,viewMode=viewMode,tocMode=tocMode)
        
        pt = getattr(self.template, 'viewer_main')               
        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 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 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.debug("XYXXXXX: %s"%repr(params.items()))
        ps = "&amp;".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)
        logging.debug("documentViewer (accessOK) access type %s"%access)
        if access is not None and 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()
            if user is not None:
                #print "user: ", user
                return (user.getUserName() != "Anonymous User")
            else:
                return False
        
        logging.debug("documentViewer (accessOK) unknown access type %s"%access)
        return False
    
                
    def getDirinfoFromDigilib(self,path,docinfo=None,cut=0):
        """gibt param von dlInfo aus"""
        if docinfo is None:
            docinfo = {}
        
        for x in range(cut):
               
                path=getParentDir(path)
       
        infoUrl=self.digilibBaseUrl+"/dirInfo-xml.jsp?mo=dir&fn="+path
    
        logging.debug("documentViewer (getparamfromdigilib) dirInfo from %s"%(infoUrl))
        
        txt = getHttpData(infoUrl)
        if txt is None:
            raise IOError("Unable to get dir-info from %s"%(infoUrl))

        dom = Parse(txt)
        sizes=dom.xpath("//dir/size")
        logging.debug("documentViewer (getparamfromdigilib) 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"""
        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("(getIndexMeta): METAURL: %s"%metaUrl)
        txt=getHttpData(metaUrl)
        if txt is None:
            raise IOError("Unable to read index meta from %s"%(url))
        
        dom = Parse(txt)
        return dom
    
    def getPresentationInfoXML(self, url):
        """returns dom of info.xml document at url"""
        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","")
        
        txt=getHttpData(metaUrl)
        if txt is None:
            raise IOError("Unable to read infoXMLfrom %s"%(url))
            
        dom = Parse(txt)
        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"""
        logging.debug("documentViewer (getauthinfofromindexmeta) 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"""
        logging.debug("documentViewer (getdocinfofromtexttool) 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:
            logging.warning("documentViewer (getdocinfofromtexttool) 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
            logging.warning("documentViewer (getdocinfofromtexttool) 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
        
        # old style text URL
        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
    
        # new style text-url-path
        textUrls = dom.xpath("//texttool/text-url-path")
        if textUrls and (len(textUrls) > 0):
            textUrl = getTextFromNode(textUrls[0])
            docinfo['textURLPath'] = textUrl
            if not docinfo['imagePath']:
                # text-only, no page images
                docinfo = self.getNumPages(docinfo) #im moment einfach auf eins setzen, navigation ueber die thumbs geht natuerlich nicht    
         
        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.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."""
        logging.debug("documentViewer (getdocinfofromimagepath) 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.debug("documentViewer (getdocinfofromimagepath) 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"""
        logging.debug("documentViewer (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') == mode and docinfo.get('url') == url:
                logging.debug("documentViewer (getdocinfo) 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:
            logging.error("documentViewer (getdocinfo) unknown mode: %s!"%mode)
            raise ValueError("Unknown mode %s! Has to be one of 'texttool','imagepath','filepath'."%(mode))
                        
        logging.debug("documentViewer (getdocinfo) docinfo: %s"%docinfo)
        self.REQUEST.SESSION['docinfo'] = docinfo
        return docinfo
               
    def getPageinfo(self, current, start=None, rows=None, cols=None, docinfo=None, viewMode=None, tocMode=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) and ('numPages' in docinfo):
            np = int(docinfo['numPages'])
            pageinfo['end'] = min(pageinfo['end'], np)
            pageinfo['numgroups'] = int(np / grpsize)
            if np % grpsize > 0:
                pageinfo['numgroups'] += 1        
        pageinfo['viewMode'] = viewMode
        pageinfo['tocMode'] = tocMode
        pageinfo['query'] = self.REQUEST.get('query',' ')
        pageinfo['queryType'] = self.REQUEST.get('queryType',' ')
        pageinfo['querySearch'] =self.REQUEST.get('querySearch', 'fulltext')
        pageinfo['textPN'] = self.REQUEST.get('textPN','1')
        pageinfo['highlightQuery'] = self.REQUEST.get('highlightQuery','')
        pageinfo['tocPageSize'] = self.REQUEST.get('tocPageSize', '30')
        pageinfo['queryPageSize'] =self.REQUEST.get('queryPageSize', '10')
        pageinfo['tocPN'] = self.REQUEST.get('tocPN', '1')
        toc = int (pageinfo['tocPN'])
        pageinfo['textPages'] =int (toc)
        
        if 'tocSize_%s'%tocMode in docinfo:
            tocSize = int(docinfo['tocSize_%s'%tocMode])
            tocPageSize = int(pageinfo['tocPageSize'])
            # cached toc           
            if tocSize%tocPageSize>0:
                tocPages=tocSize/tocPageSize+1
            else:
                tocPages=tocSize/tocPageSize
            pageinfo['tocPN'] = min (tocPages,toc)                    
        pageinfo['searchPN'] =self.REQUEST.get('searchPN','1')
        pageinfo['sn'] =self.REQUEST.get('sn','')
        return pageinfo
    
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(',')]
        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 ''