--- ECHO_content/ECHO_helpers.py	2011/10/13 07:48:27	1.103.2.1
+++ ECHO_content/ECHO_helpers.py	2012/01/19 19:03:28	1.103.2.4
@@ -11,6 +11,7 @@ from OFS.SimpleItem import SimpleItem
 from Globals import package_home
 import Globals
 from AccessControl import ClassSecurityInfo
+from Acquisition import aq_parent,aq_chain,aq_base
 import os.path
 from OFS.Folder import Folder
 import ECHO_collection
@@ -131,6 +132,9 @@ class ECHO_basis:
         """return utf-8 encoded string object for string or unicode object s"""
         return utf8ify(s)
 
+    def getBrowserType(self):
+        """returns browserType object"""
+        return browserType(self)
     
     def manage_addECHO_locale(self,lang,title,label,text=None,content_type=None,RESPONSE=None):
             return ECHO_collection.manage_addECHO_locale(self,lang,title,label)
@@ -324,9 +328,7 @@ class ECHO_basis:
     def getOverview(self):
         """map overview graphics"""
         #return self.aq_parent.ZopeFind(self.aq_parent,obj_ids=['overview'])[0][1]
-        if self.hasOverview():
-            return getattr(self, 'overview')
-        return None
+        return getattr(self, 'overview', None)
 
     def getMapAreas(self):
         """returns the list of MapAreas"""
@@ -441,10 +443,10 @@ class ECHO_basis:
 
     def createMapImg(self):
         """generate img-tag for map"""
-        bt = BrowserCheck(self)
+        bt = browserType(self)
         tag = ""
         src = self.getOverview().absolute_url()
-        if bt.isN4:
+        if bt['isN4']:
             # N4 needs ilayer to create an id
             tag += '<ilayer id="overview" visibility="show"><img src="%s"></ilayer>'%src
         else:
@@ -458,7 +460,7 @@ class ECHO_basis:
 
     def createMapLink(self, ob, text=None, target="_blank"):
         """generate map link"""
-        bt = BrowserCheck(self)
+        bt = browserType(self)
         id = ob.getFullId()
         url = ob.getTargetUrl()
         if url == "":
@@ -480,7 +482,7 @@ class ECHO_basis:
             
         tiptext = ob.getTip()
         tag = ""
-        if bt.isN4:
+        if bt['isN4']:
             # N4 needs layer for highlighting
             tag += '<ilayer id="a.%s"><a class="maplink" onmouseover="highlightPair(\'%s\', true)" onmouseout="highlightPair(\'%s\', false)" %s %s'%(id,id,id,href,targetattr)
             tag += ">" + text + "</a></ilayer>"
@@ -494,7 +496,7 @@ class ECHO_basis:
 
     def createMapAux(self, ob, arrowsrc="http://nausikaa2.rz-berlin.mpg.de/digitallibrary/servlet/Scaler/?dw=15&fn=icons/pfeil", circlesrc="http://nausikaa2.rz-berlin.mpg.de/digitallibrary/servlet/Scaler/?dw=15&fn=icons/kreis", target="_blank",backLink=None,alternativArrowsrc="http://nausikaa2.rz-berlin.mpg.de/digitallibrary/servlet/Scaler/?dw=15&fn=icons/pfeil_blau"):
         """generate map link image, text and other stuff"""
-        bt = BrowserCheck(self)
+        bt = browserType(self)
         id = ob.getFullId()
         link = ob.getLinkId()
         url = ob.getTargetUrl()
@@ -511,7 +513,7 @@ class ECHO_basis:
         tiptext = ob.getTip()
         tag = ""
 
-        if bt.isN4:
+        if bt['isN4']:
             #
             # N4 needs layer and img elements
             #
@@ -574,7 +576,7 @@ class ECHO_basis:
 
                 if float(rot) < 0:
                     marksrc = circlesrc
-                if bt.isIEWin and bt.versIE > 5:
+                if bt['isIEWin'] and bt['versIE'] > 5:
                     # IE/Win 5.5 has "feature" for PNG transparency
                     tag += '<span id="i.%s" style="position:absolute; top:-100px; left:-100px; border-style:none; border-width=1px; filter:progid:DXImageTransform.Microsoft.AlphaImageLoader(src=\'%s&rot=%s\');"><img style="visibility:hidden" src="%s&rot=%s" /></span>'%(id,marksrc,rot,marksrc,rot)
                 else:
@@ -589,7 +591,7 @@ class ECHO_basis:
                 tag += '</div></div>'
             else:
                 # DOM - Area
-                if bt.isIE:
+                if bt['isIE']:
                     # IE needs transparent img for area
                     tag += '<img id="i.%s" border="0" style="position:absolute; top:-100px; left:-100px;" src="trans_img"'%(id)
                     if tiptext:
@@ -693,6 +695,41 @@ def checkOnlyOneInGroup(object):
         else:           return object
 
 
+
+def getCrumb(self):
+    """returns breadcrumb for this object"""
+    # ignore this object if title is empty
+    if not self.title:
+        return None
+    
+    crumb = {'obj': self,
+             'url': self.absolute_url(),
+             'label': self.getLabel()}
+    return crumb        
+
+# roots of the ECHO hierarchy
+rootMetaTypes = ['ECHO_root', 'ECHO_main', 'ECHO_nav']
+
+def getHierCrumbs(self):
+    """returns a list of hierarchical breadcrumbs from self to the ECHO_root"""
+    crumbs = []
+    # walk the acquisition chain
+    for obj in aq_chain(self):
+        #logging.debug("getHiercrumbs: obj=%s"%(obj))
+        # test if the object really has a getCrumb method
+        if hasattr(aq_base(obj), 'getCrumb'):
+            crumb = obj.getCrumb()
+            #logging.debug("getHiercrumbs: got %s from %s"%(crumb,obj))
+            if crumb is not None:
+                crumbs.insert(0, crumb)
+                
+            if obj.meta_type in rootMetaTypes:
+                # stop when we reach the ECHO root
+                return crumbs
+        
+    return crumbs        
+
+
 def getSubCols(self, sortfield=None, 
                subColTypes=displayTypes, 
                sortFieldMD=None,
@@ -996,28 +1033,30 @@ def sendFile(self, filename, type):
     return
 
 
-class BrowserCheck:
+def browserType(zope):
     """check the browsers request to find out the browser type"""
+    bt = {}
+    ua = zope.REQUEST.get_header("HTTP_USER_AGENT")
+    bt['ua'] = ua
+    bt['isN4'] = False
+    bt['isIE'] = False
+    if string.find(ua, 'MSIE') > -1:
+        bt['isIE'] = True
+    else:
+        bt['isN4'] = string.find(ua, 'Mozilla/4.') > -1
+    try:
+        nav = ua[string.find(ua, '('):]
+        bt['nav'] = nav
+        ie = string.split(nav, "; ")[1]
+        if string.find(ie, "MSIE") > -1:
+            bt['versIE'] = string.split(ie, " ")[1]
+    except: pass
     
-    def __init__(self, zope):
-        """initialisiere"""
-        self.ua = zope.REQUEST.get_header("HTTP_USER_AGENT")
-        self.isN4 = False
-        self.isIE = False
-        if string.find(self.ua, 'MSIE') > -1:
-            self.isIE = True
-        else:
-            self.isN4 = string.find(self.ua, 'Mozilla/4.') > -1
-        try:
-            self.nav = self.ua[string.find(self.ua, '('):]
-            ie = string.split(self.nav, "; ")[1]
-            if string.find(ie, "MSIE") > -1:
-                self.versIE = string.split(ie, " ")[1]
-        except: pass
-        self.isMac = string.find(self.ua, 'Macintosh') > -1
-        self.isWin = string.find(self.ua, 'Windows') > -1
-        self.isIEWin = self.isIE and self.isWin
-        self.isIEMac = self.isIE and self.isMac
+    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']
+    return bt
 
                 
 def writeMetadata(url,metadict,project=None,startpage=None,xslt=None,thumbtemplate=None,topbar=None,digiLibTemplate=None,xmlfrag=None,digiliburlprefix=None):