File:  [Repository] / zogiLib / zogiLib.py
Revision 1.26: download - view: text, annotated - select for diffs - revision graph
Mon Jun 7 17:56:55 2004 UTC (20 years ago) by casties
Branches: MAIN
CVS tags: HEAD
new also with static html version (not enabled by default)


from Products.PageTemplates.PageTemplateFile import PageTemplateFile
from Products.PageTemplates.PageTemplate import PageTemplate
from Products.PageTemplates.ZopePageTemplate import ZopePageTemplate
from OFS.Image import Image
from webdav.common import rfc1123_date

import xml.dom.minidom
from OFS.Folder import Folder
from xml_helpers import getText
import os
import re
import string
import urllib
import types
from Globals import package_home

def sendFile(self, filename, type):
    """sends an object or a local file (in the product) as response"""
    paths = filename.split('/')
    object = self
    # look for an object called filename
    for path in paths:
        if hasattr(object, path):
	    object = getattr(object, path)
	else:
	    object = None
	    break
    if object:
	# if the object exists then send it
	return object.index_html(self.REQUEST.REQUEST, self.REQUEST.RESPONSE)
    else:
	# send a local file with the given content-type
	fn = os.path.join(package_home(globals()), filename)
	self.REQUEST.RESPONSE.setHeader("Content-Type", type)
	self.REQUEST.RESPONSE.write(file(fn).read())
    return

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'] = string.find(ua, 'MSIE') > -1
    bt['isN4'] = (string.find(ua, 'Mozilla/4.') > -1) and not bt['isIE']
    nav = ua[string.find(ua, '('):]
    ie = string.split(nav, "; ")[1]
    if string.find(ie, "MSIE") > -1:
        bt['versIE'] = string.split(ie, " ")[1]
    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 manage_addZogiLibMainTemplateForm(self):
    """Form for adding"""
    #FIXME:???
    pt=PageTemplateFile(os.path.join(package_home(globals()), 'zpt/AddOSAS_thumbTemplate.zpt')).__of__(self)
    return pt()




def manage_addZogiLibMainTemplate(self, id,title=None, text=None,
                           REQUEST=None, submit=None):
    "Add a Page Template with optional file content."
    #FIXME:???
    id = str(id)
    if REQUEST is None:
        self._setObject(id, zogiLib_mainTemplate(id, text))
        ob = getattr(self, id)
       
        if title:
            ob.pt_setTitle(title)
        return ob
    else:
        file = REQUEST.form.get('file')
        headers = getattr(file, 'headers', None)
        if headers is None or not file.filename:
            zpt = zogiLib_mainTemplate(id)
        else:
            zpt = zogiLib_mainTemplate(id, file, headers.get('content_type'))

        self._setObject(id, zpt)
        ob = getattr(self, id)


        try:
            u = self.DestinationURL()
        except AttributeError:
            u = REQUEST['URL1']

        if submit == " Add and Edit ":
            u = "%s/%s" % (u, quote(id))
        REQUEST.RESPONSE.redirect(u+'/manage_main')
    return ''

    
class zogiImage(Image):
    """einzelnes Image"""
    meta_type="zogiImage"

    manage_options=ZopePageTemplate.manage_options+(
        {'label':'Main config','action':'changeZogiImageForm'},
       )
    
    
    def __init__(self,id,title,baseUrl,queryString,content_type='',precondition=''):
        """init"""
        self.id=id
        self.title=title
        self.baseUrl=baseUrl
        self.queryString=queryString
        self.content_type=content_type
        self.precondition=precondition

    def getData(self):
        """getUrlData"""
        return urllib.urlopen(self.baseUrl+self.queryString)

    def changeZogiImageForm(self):
        """Main configuration"""
        pt=PageTemplateFile(os.path.join(package_home(globals()), 'zpt/changeZogiImageForm.zpt')).__of__(self)
        return pt()
    
    def changeZogiImage(self,title,baseUrl, queryString,RESPONSE=None):
        """change it"""
        self.title=title
        self.baseUrl=baseUrl
        self.queryString=queryString

        if RESPONSE is not None:
            RESPONSE.redirect('manage_main')

        
    def index_html(self, REQUEST, RESPONSE):
        """
        Modified version of OFS/Image.py
        
        The default view of the contents of a File or Image.

        Returns the contents of the file or image.  Also, sets the
        Content-Type HTTP header to the objects content type.
        """

        # HTTP If-Modified-Since header handling.
        header=REQUEST.get_header('If-Modified-Since', None)
        if header is not None:
            header=header.split( ';')[0]
            # Some proxies seem to send invalid date strings for this
            # header. If the date string is not valid, we ignore it
            # rather than raise an error to be generally consistent
            # with common servers such as Apache (which can usually
            # understand the screwy date string as a lucky side effect
            # of the way they parse it).
            # This happens to be what RFC2616 tells us to do in the face of an
            # invalid date.
            try:    mod_since=long(DateTime(header).timeTime())
            except: mod_since=None
            if mod_since is not None:
                if self._p_mtime:
                    last_mod = long(self._p_mtime)
                else:
                    last_mod = long(0)
                if last_mod > 0 and last_mod <= mod_since:
                    # Set header values since apache caching will return Content-Length
                    # of 0 in response if size is not set here
                    RESPONSE.setHeader('Last-Modified', rfc1123_date(self._p_mtime))
                    RESPONSE.setHeader('Content-Type', self.content_type)
                    RESPONSE.setHeader('Content-Length', self.size)
                    RESPONSE.setHeader('Accept-Ranges', 'bytes')
                    self.ZCacheable_set(None)
                    RESPONSE.setStatus(304)
                    return ''

        if self.precondition and hasattr(self,self.precondition):
            # Grab whatever precondition was defined and then
            # execute it.  The precondition will raise an exception
            # if something violates its terms.
            c=getattr(self,self.precondition)
            if hasattr(c,'isDocTemp') and c.isDocTemp:
                c(REQUEST['PARENTS'][1],REQUEST)
            else:
                c()

        # HTTP Range header handling
        range = REQUEST.get_header('Range', None)
        request_range = REQUEST.get_header('Request-Range', None)
        if request_range is not None:
            # Netscape 2 through 4 and MSIE 3 implement a draft version
            # Later on, we need to serve a different mime-type as well.
            range = request_range
        if_range = REQUEST.get_header('If-Range', None)
        if range is not None:
            ranges = HTTPRangeSupport.parseRange(range)

            if if_range is not None:
                # Only send ranges if the data isn't modified, otherwise send
                # the whole object. Support both ETags and Last-Modified dates!
                if len(if_range) > 1 and if_range[:2] == 'ts':
                    # ETag:
                    if if_range != self.http__etag():
                        # Modified, so send a normal response. We delete
                        # the ranges, which causes us to skip to the 200
                        # response.
                        ranges = None
                else:
                    # Date
                    date = if_range.split( ';')[0]
                    try: mod_since=long(DateTime(date).timeTime())
                    except: mod_since=None
                    if mod_since is not None:
                        if self._p_mtime:
                            last_mod = long(self._p_mtime)
                        else:
                            last_mod = long(0)
                        if last_mod > mod_since:
                            # Modified, so send a normal response. We delete
                            # the ranges, which causes us to skip to the 200
                            # response.
                            ranges = None

            if ranges:
                # Search for satisfiable ranges.
                satisfiable = 0
                for start, end in ranges:
                    if start < self.size:
                        satisfiable = 1
                        break

                if not satisfiable:
                    RESPONSE.setHeader('Content-Range',
                        'bytes */%d' % self.size)
                    RESPONSE.setHeader('Accept-Ranges', 'bytes')
                    RESPONSE.setHeader('Last-Modified',
                        rfc1123_date(self._p_mtime))
                    RESPONSE.setHeader('Content-Type', self.content_type)
                    RESPONSE.setHeader('Content-Length', self.size)
                    RESPONSE.setStatus(416)
                    return ''

                ranges = HTTPRangeSupport.expandRanges(ranges, self.size)
                                
                if len(ranges) == 1:
                    # Easy case, set extra header and return partial set.
                    start, end = ranges[0]
                    size = end - start

                    RESPONSE.setHeader('Last-Modified',
                        rfc1123_date(self._p_mtime))
                    RESPONSE.setHeader('Content-Type', self.content_type)
                    RESPONSE.setHeader('Content-Length', size)
                    RESPONSE.setHeader('Accept-Ranges', 'bytes')
                    RESPONSE.setHeader('Content-Range',
                        'bytes %d-%d/%d' % (start, end - 1, self.size))
                    RESPONSE.setStatus(206) # Partial content

                    data = urllib.urlopen(self.baseUrl+self.queryString).read()
                    if type(data) is StringType:
                        return data[start:end]

                    # Linked Pdata objects. Urgh.
                    pos = 0
                    while data is not None:
                        l = len(data.data)
                        pos = pos + l
                        if pos > start:
                            # We are within the range
                            lstart = l - (pos - start)

                            if lstart < 0: lstart = 0

                            # find the endpoint
                            if end <= pos:
                                lend = l - (pos - end)

                                # Send and end transmission
                                RESPONSE.write(data[lstart:lend])
                                break

                            # Not yet at the end, transmit what we have.
                            RESPONSE.write(data[lstart:])

                        data = data.next

                    return ''

                else:
                    boundary = choose_boundary()

                    # Calculate the content length
                    size = (8 + len(boundary) + # End marker length
                        len(ranges) * (         # Constant lenght per set
                            49 + len(boundary) + len(self.content_type) +
                            len('%d' % self.size)))
                    for start, end in ranges:
                        # Variable length per set
                        size = (size + len('%d%d' % (start, end - 1)) +
                            end - start)


                    # Some clients implement an earlier draft of the spec, they
                    # will only accept x-byteranges.
                    draftprefix = (request_range is not None) and 'x-' or ''

                    RESPONSE.setHeader('Content-Length', size)
                    RESPONSE.setHeader('Accept-Ranges', 'bytes')
                    RESPONSE.setHeader('Last-Modified',
                        rfc1123_date(self._p_mtime))
                    RESPONSE.setHeader('Content-Type',
                        'multipart/%sbyteranges; boundary=%s' % (
                            draftprefix, boundary))
                    RESPONSE.setStatus(206) # Partial content

                    data = urllib.urlopen(self.baseUrl+self.queryString).read()
                    # The Pdata map allows us to jump into the Pdata chain
                    # arbitrarily during out-of-order range searching.
                    pdata_map = {}
                    pdata_map[0] = data

                    for start, end in ranges:
                        RESPONSE.write('\r\n--%s\r\n' % boundary)
                        RESPONSE.write('Content-Type: %s\r\n' %
                            self.content_type)
                        RESPONSE.write(
                            'Content-Range: bytes %d-%d/%d\r\n\r\n' % (
                                start, end - 1, self.size))

                        if type(data) is StringType:
                            RESPONSE.write(data[start:end])

                        else:
                            # Yippee. Linked Pdata objects. The following
                            # calculations allow us to fast-forward through the
                            # Pdata chain without a lot of dereferencing if we
                            # did the work already.
                            first_size = len(pdata_map[0].data)
                            if start < first_size:
                                closest_pos = 0
                            else:
                                closest_pos = (
                                    ((start - first_size) >> 16 << 16) +
                                    first_size)
                            pos = min(closest_pos, max(pdata_map.keys()))
                            data = pdata_map[pos]

                            while data is not None:
                                l = len(data.data)
                                pos = pos + l
                                if pos > start:
                                    # We are within the range
                                    lstart = l - (pos - start)

                                    if lstart < 0: lstart = 0

                                    # find the endpoint
                                    if end <= pos:
                                        lend = l - (pos - end)

                                        # Send and loop to next range
                                        RESPONSE.write(data[lstart:lend])
                                        break

                                    # Not yet at the end, transmit what we have.
                                    RESPONSE.write(data[lstart:])

                                data = data.next
                                # Store a reference to a Pdata chain link so we
                                # don't have to deref during this request again.
                                pdata_map[pos] = data

                    # Do not keep the link references around.
                    del pdata_map

                    RESPONSE.write('\r\n--%s--\r\n' % boundary)
                    return ''

        RESPONSE.setHeader('Last-Modified', rfc1123_date(self._p_mtime))
        RESPONSE.setHeader('Content-Type', self.content_type)
        RESPONSE.setHeader('Content-Length', self.size)
        RESPONSE.setHeader('Accept-Ranges', 'bytes')

        # Don't cache the data itself, but provide an opportunity
        # for a cache manager to set response headers.
        self.ZCacheable_set(None)

        data=urllib.urlopen(self.baseUrl+self.queryString).read()
        
        if type(data) is type(''): 
            RESPONSE.setBase(None)
            return data

        while data is not None:
            RESPONSE.write(data.data)
            data=data.next

        return ''


def manage_addZogiImageForm(self):
    """Form for adding"""
    pt=PageTemplateFile(os.path.join(package_home(globals()), 'zpt/addZogiImage.zpt')).__of__(self)
    return pt()


def manage_addZogiImage(self,id,title,baseUrl, queryString,RESPONSE=None):
    """add dgilib"""
    newObj=zogiImage(id,title,baseUrl, queryString)
    self.Destination()._setObject(id,newObj)
    if RESPONSE is not None:
        RESPONSE.redirect('manage_main')



class zogiLib(Folder):
    """StandardElement"""

    meta_type="zogiLib"

    manage_options = Folder.manage_options+(
            {'label':'Main Config','action':'changeZogiLibForm'},
            )

    def __init__(self, id, title, digilibBaseUrl, localFileBase, version="book", basePath=""):
        """init"""

        self.id=id
        self.title=title
        self.digilibBaseUrl=digilibBaseUrl
        self.localFileBase=localFileBase
        self.basePath=basePath
        self.layout=version


    def getDLInfo(self):
        """get DLInfo from digilib server"""
        paramH={}
        baseUrl=re.sub("servlet/Scaler","dlInfo-xml.jsp",self.digilibBaseUrl)
        try:
            url=urllib.urlopen(baseUrl+self.REQUEST['QUERY_STRING'])
            dom=xml.dom.minidom.parse(url)
            params=dom.getElementsByTagName('parameter')
            for param in params:
                paramH[param.getAttribute('name')]=param.getAttribute('value')
            return paramH
        except:
            return null


    def createHeadJS(self):
        """generate all javascript tags for head"""
	self.checkQuery()
	bt = self.REQUEST.SESSION['browserType']
        if bt['staticHTML']:
            return
        
        pt=PageTemplateFile(os.path.join(package_home(globals()), 'zpt/zogilib_head_js')).__of__(self)
        return pt()

    def createParamJS(self):
        """generate javascript for parameters only"""
	self.checkQuery()
	bt = self.REQUEST.SESSION['browserType']
        if bt['staticHTML']:
            return

        pt=PageTemplateFile(os.path.join(package_home(globals()), 'zpt/zogilib_param_js')).__of__(self)
        return pt()
        
                        
    def createScalerImg(self, requestString=None, bottom=0, side=0, width=500, height=500):
        """generate Scaler IMG Tag"""
	self.checkQuery()
	bt = self.REQUEST.SESSION['browserType']
        # override with parameters from session
        if  self.REQUEST.SESSION.has_key('scalerDiv'):
            (requestString, bottom, side, width, height) = self.REQUEST.SESSION['scalerDiv']
        # if not explicitly defined take normal request
        if not requestString:
            requestString = self.getAllDLParams()
        url = self.digilibBaseUrl+requestString
        # construct bottom and side insets
        b_par = ""
        s_par = ""
        if (bottom != 0) or (side != 0):
            b_par = "-" + str(int(bottom))
            s_par = "-" + str(int(side))
        tag = ""
        if bt['staticHTML']:
            tag += '<div id="scaler"><img id="pic" src="%s&dw=%i&dh=%i" /></div>'%(url, int(width-side), int(height-bottom))
        else:
            if bt['isN4']:
                # N4 needs layers
                tag += '<ilayer id="scaler">'
            else:
                tag += '<div id="scaler">'
            tag += '<script type="text/javascript">'
            tag += "var ps = bestPicSize(getElement('scaler'));"
            # write img tag with javascript
            tag += 'document.write(\'<img id="pic" src="%s&dw=\'+(ps.width%s)+\'&dh=\'+(ps.height%s)+\'" />\');'%(url, s_par, b_par)
            tag += '</script>'
            if bt['isN4']:
                tag += '</ilayer>'
            else:
                tag += '</div>'
        return tag

    def createScalerDiv(self, requestString = None, bottom = 0, side = 0, width=500, height=500):
        """generate scaler img and table with navigation arrows"""
	self.checkQuery()
        if requestString != None or bottom != 0 or side != 0:
            self.REQUEST.SESSION['scalerDiv'] = (requestString, bottom, side, width, height)
        else:
            if self.REQUEST.SESSION.has_key('scalerDiv'):
                # make shure to remove unused parameter
                del self.REQUEST.SESSION['scalerDiv']
                
        pt=PageTemplateFile(os.path.join(package_home(globals()),'zpt/zogilib_img_div')).__of__(self)
        return pt()

    def createAuxDiv(self):
        """generate other divs"""
	self.checkQuery()
	bt = self.REQUEST.SESSION['browserType']
        if bt['staticHTML']:
            return
        if bt['isN4']:
            f = 'zpt/zogilib_divsN4.zpt'
        else:
            f = 'zpt/zogilib_divs.zpt'
        pt=PageTemplateFile(os.path.join(package_home(globals()),f)).__of__(self)
        return pt()


    def option_js(self):
        """option_js"""
        pt=PageTemplateFile(os.path.join(package_home(globals()), 'zpt/option_js')).__of__(self)
        return pt()

    def dl_lib_js(self):
        """javascript"""
        return sendFile(self, 'js/dl_lib.js', 'text/plain')

    def js_lib_js(self):
        """javascript"""
        return sendFile(self, 'js/js_lib.js', 'text/plain')

    def optionwindow(self):
        """showoptions"""
	self.checkQuery()
	bt = self.REQUEST.SESSION['browserType']
        if bt['staticHTML']:
            pt=PageTemplateFile(os.path.join(package_home(globals()), 'zpt/optionwindow_static.zpt')).__of__(self)
        else:
            pt=PageTemplateFile(os.path.join(package_home(globals()), 'zpt/optionwindow.zpt')).__of__(self)
        return pt()

    def mark1(self):
        """mark image"""
        return sendFile(self, 'images/mark1.gif', 'image/gif')

    def mark2(self):
        """mark image"""
        return sendFile(self, 'images/mark2.gif', 'image/gif')

    def mark3(self):
        """mark image"""
        return sendFile(self, 'images/mark3.gif', 'image/gif')

    def mark4(self):
        """mark image"""
        return sendFile(self, 'images/mark4.gif', 'image/gif')

    def mark5(self):
        """mark image"""
        return sendFile(self, 'images/mark5.gif', 'image/gif')

    def mark6(self):
        """mark image"""
        return sendFile(self, 'images/mark6.gif', 'image/gif')

    def mark7(self):
        """mark image"""
        return sendFile(self, 'images/mark7.gif', 'image/gif')

    def mark8(self):
        """mark image"""
        return sendFile(self, 'images/mark8.gif', 'image/gif')

    def corner1(self):
        """mark image"""
        return sendFile(self, 'images/olinks.gif', 'image/gif')

    def corner2(self):
        """mark image"""
        return sendFile(self, 'images/orechts.gif', 'image/gif')

    def corner3(self):
        """mark image"""
        return sendFile(self, 'images/ulinks.gif', 'image/gif')

    def corner4(self):
        """mark image"""
        return sendFile(self, 'images/urechts.gif', 'image/gif')

    def up_img(self):
        """mark image"""
        return sendFile(self, 'images/up.gif', 'image/gif')

    def down_img(self):
        """mark image"""
        return sendFile(self, 'images/down.gif', 'image/gif')

    def left_img(self):
        """mark image"""
        return sendFile(self, 'images/left.gif', 'image/gif')

    def right_img(self):
        """mark image"""
        return sendFile(self, 'images/right.gif', 'image/gif')


            
    def index_html(self):
        """main action"""
	self.checkQuery()
	bt = self.REQUEST.SESSION['browserType']
        tp = "zogiLibMainTemplate"
        if hasattr(self, tp):
	    pt = getattr(self, tp)
        else:
            tpt = self.layout
            if bt['staticHTML']:
                tpt = "static"
                
            pt=PageTemplateFile(os.path.join(package_home(globals()), 'zpt/zogiLibMain_%s'%tpt)).__of__(self)
            
        return pt()



    def storeQuery(self, more = None):
        """storeQuery in session"""
        dlParams = {}
        for fm in self.REQUEST.form.keys():
            dlParams[fm] = self.REQUEST.form[fm]
        # look for more
        if more:
            for fm in more.split('&'):
                try:
                    pv = fm.split('=')
                    dlParams[pv[0]] = pv[1]
                except:
                    pass
                
        # parse digilib mode parameter
        if 'mo' in dlParams:
            if len(dlParams['mo']) > 0:
                modes=dlParams['mo'].split(',')
        else:
            modes=[]

        self.REQUEST.SESSION['query'] = dlParams
        self.REQUEST.SESSION['dlModes'] = modes
        self.REQUEST.SESSION['dlInfo'] = self.getDLInfo()
        if not self.REQUEST.SESSION.has_key('browserType'):
            self.REQUEST.SESSION['browserType'] = browserCheck(self)
            
        return

    def checkQuery(self):
	"""check if the query has been stored"""
	if not (self.REQUEST.SESSION and self.REQUEST.SESSION.has_key('query')) :
	    print "ZOGILIB: have to store query!!"
	    self.storeQuery()
        return

    def zogilibPath(self, otherbase=None):
        """returns an URL to the zogiLib instance"""
        url = self.REQUEST['URL1']
        # should end with "/"
        if len(url) > 0 and url[-1] != '/':
            url += '/'
        if type(otherbase) is str:
            url += otherbase
        else:
            url += self.basePath
        # should end with "/"
        if len(url) > 0 and url[-1] != '/':
            url += '/'
        return url
        
    def getDLParam(self, param):
        """returns parameter"""
        try:
            return self.REQUEST.SESSION['query'][param]
        except:
            return

    def setDLParam(self, param, value):
        """sets parameter"""
        self.REQUEST.SESSION['query'][param] = value
        return

    def getAllDLParams(self):
        """parameter string for digilib"""
        dlParams = self.REQUEST.SESSION['query']
        # save modes
        modes = self.REQUEST.SESSION['dlModes']
        dlParams['mo'] = string.join(modes, ',')
        # assemble query string
        ret = ""
        for param in dlParams.keys():
            val = str(dlParams[param])
            if val != "":
                ret += param + "=" + val + "&"
        # omit trailing "&"
        return ret.rstrip('&')

        
    def setDLParams(self,pn=None,ws=None,rot=None,brgt=None,cont=None):
        """setze Parameter"""

        self.setDLParam('brgt', brgt)
        self.setDLParam('cont', cont)
        self.setDLParam('ws', ws)
        self.setDLParam('rot', rot)

        if pn:
            # unmark
            self.setDLParam('mk', None)
            self.setDLParam('pn', pn)
            
        return self.display()


    def display(self):
        """(re)display page"""
        params = self.getAllDLParams()
        if self.basePath:
            self.REQUEST.RESPONSE.redirect(self.REQUEST['URL2']+'?'+params)
        else:
            self.REQUEST.RESPONSE.redirect(self.REQUEST['URL1']+'?'+params)


    def setStaticHTML(self, static=True):
        """sets the preference to static HTML"""
        self.checkQuery()
 	self.REQUEST.SESSION['browserType']['staticHTML'] = static
        return

    def isStaticHTML(self):
        """returns if the page is using static HTML only"""
        self.checkQuery()
	return self.REQUEST.SESSION['browserType']['staticHTML']

    def getPT(self):
        """pagenums"""
        di = self.REQUEST.SESSION['dlInfo']
        if di:
            return int(di['pt'])
        else:
            return 1
    
    def getPN(self):
        """Pagenum"""
        pn = self.getDLParam('pn')
        try:
            return int(pn)
        except:
            return 1

    def getBiggerWS(self):
        """ws+1"""
        ws = self.getDLParam('ws')
        try:
            return float(ws)+0.5
        except:
            return 1.5
        
    def getSmallerWS(self):
        """ws-1"""
        ws=self.getDLParam('ws')
        try:
            return max(float(ws)-0.5, 1)
        except:
            return 1

    def hasMode(self, mode):
        """returns if mode is in the diglib mo parameter"""
        return (mode in self.REQUEST.SESSION['dlModes'])

    def hasNextPage(self):
        """returns if there is a next page"""
        pn = self.getPN()
        pt = self.getPT()
        return (pn < pt)
   
    def hasPrevPage(self):
        """returns if there is a previous page"""
        pn = self.getPN()
        return (pn > 1)

    def canMoveLeft(self):
        """returns if its possible to move left"""
        wx = float(self.getDLParam('wx') or 0)
        return (wx > 0)

    def canMoveRight(self):
        """returns if its possible to move right"""
        wx = float(self.getDLParam('wx') or 0)
        ww = float(self.getDLParam('ww') or 1)
        return (wx + ww < 1)

    def canMoveUp(self):
        """returns if its possible to move up"""
        wy = float(self.getDLParam('wy') or 0)
        return (wy > 0)

    def canMoveDown(self):
        """returns if its possible to move down"""
        wy = float(self.getDLParam('wy') or 0)
        wh = float(self.getDLParam('wh') or 1)
        return (wy + wh < 1)


    def dl_StaticHTML(self):
        """set rendering to static HTML"""
        self.checkQuery()
        self.REQUEST.SESSION['browserType']['staticHTML'] = True
        return self.display()

    def dl_DynamicHTML(self):
        """set rendering to dynamic HTML"""
        self.checkQuery()
        self.REQUEST.SESSION['browserType']['staticHTML'] = False
        return self.display()
        
    def dl_HMirror(self):
        """mirror action"""
        modes = self.REQUEST.SESSION['dlModes']
        if 'hmir' in modes:
            modes.remove('hmir')
        else:
            modes.append('hmir')

        return self.display()
       
    def dl_VMirror(self):
        """mirror action"""
        modes = self.REQUEST.SESSION['dlModes']
        if 'vmir' in modes:
            modes.remove('vmir')
        else:
            modes.append('vmir')

        return self.display()

    def dl_Zoom(self, z):
        """general zoom action"""
        ww1 = float(self.getDLParam('ww') or 1)
        wh1 = float(self.getDLParam('wh') or 1)
        wx = float(self.getDLParam('wx') or 0)
        wy = float(self.getDLParam('wy') or 0)
        ww2 = ww1 * z
        wh2 = wh1 * z
        wx += (ww1 - ww2) / 2
        wy += (wh1 - wh2) / 2
        ww2 = max(min(ww2, 1), 0)
        wh2 = max(min(wh2, 1), 0)
        wx = max(min(wx, 1), 0)
        wy = max(min(wy, 1), 0)
        self.setDLParam('ww', ww2)
        self.setDLParam('wh', wh2)
        self.setDLParam('wx', wx)
        self.setDLParam('wy', wy)
        return self.display()
        
    def dl_ZoomIn(self):
        """zoom in action"""
        z = 0.7071
        return self.dl_Zoom(z)

    def dl_ZoomOut(self):
        """zoom out action"""
        z = 1.4142
        return self.dl_Zoom(z)

    def dl_Move(self, dx, dy):
        """general move action"""
        ww = float(self.getDLParam('ww') or 1)
        wh = float(self.getDLParam('wh') or 1)
        wx = float(self.getDLParam('wx') or 0)
        wy = float(self.getDLParam('wy') or 0)
        wx += dx * 0.5 * ww
        wy += dy * 0.5 * wh
        wx = max(min(wx, 1), 0)
        wy = max(min(wy, 1), 0)
        self.setDLParam('wx', wx)
        self.setDLParam('wy', wy)
        return self.display()
        
    def dl_MoveLeft(self):
        """move left action"""
        return self.dl_Move(-1, 0)
    
    def dl_MoveRight(self):
        """move left action"""
        return self.dl_Move(1, 0)
    
    def dl_MoveUp(self):
        """move left action"""
        return self.dl_Move(0, -1)
    
    def dl_MoveDown(self):
        """move left action"""
        return self.dl_Move(0, 1)
    
    def dl_WholePage(self):
        """zoom out action"""
        self.setDLParam('ww', 1)
        self.setDLParam('wh', 1)
        self.setDLParam('wx', 0)
        self.setDLParam('wy', 0)
        return self.display()
        
    def dl_PrevPage(self):
        """next page action"""
        pn = self.getPN() - 1
        if pn < 1:
            pn = 1
        self.setDLParam('pn', pn)
        # unmark
        self.setDLParam('mk', None)
        return self.display()
        
    def dl_NextPage(self):
        """next page action"""
        pn = self.getPN() + 1
        pt = self.getPT()
        if pn > pt:
            pn = pt
        self.setDLParam('pn', pn)
        # unmark
        self.setDLParam('mk', None)
        return self.display()

    def dl_FirstPage(self):
        """first page action"""
        self.setDLParam('pn', 1)
        # unmark
        self.setDLParam('mk', None)
        return self.display()
    
    def dl_LastPage(self):
        """last page action"""
        self.setDLParam('pn', self.getPT())
        # unmark
        self.setDLParam('mk', None)
        return self.display()

    def dl_Unmark(self):
        """action to remove last mark"""
        mk = self.getDLParam('mk')
        if mk:
            marks = mk.split(',')
            marks.pop()
            mk = string.join(marks, ',')
            self.setDLParam('mk', mk)
        return self.display()



    def changeZogiLibForm(self):
        """Main configuration"""
        pt=PageTemplateFile(os.path.join(package_home(globals()), 'zpt/changeZogiLibForm.zpt')).__of__(self)
        return pt()
    
    def changeZogiLib(self,title,digilibBaseUrl, localFileBase, version, basePath, RESPONSE=None):
        """change it"""
        self.title=title
        self.digilibBaseUrl=digilibBaseUrl
        self.localFileBase=localFileBase
        self.basePath = basePath
        self.layout=version

        if RESPONSE is not None:
            RESPONSE.redirect('manage_main')

          
def manage_addZogiLibForm(self):
    """interface for adding zogilib"""
    pt=PageTemplateFile(os.path.join(package_home(globals()), 'zpt/addZogiLibForm')).__of__(self)
    return pt()

def manage_addZogiLib(self,id,title,digilibBaseUrl, localFileBase,version="book",basePath="",RESPONSE=None):
    """add dgilib"""
    newObj=zogiLib(id,title,digilibBaseUrl, localFileBase, version, basePath)
    self.Destination()._setObject(id,newObj)
    if RESPONSE is not None:
        RESPONSE.redirect('manage_main')

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