initial

lib/python/TreeDisplay/Setup

-*shared*
+# install TreeItem.py
+# install TreeTag.py
+# install www www/%(package)s

lib/python/TreeDisplay/TreeItem.py

+
+"""Tree Protocol
+
+$Id: TreeItem.py,v 1.1 1997/09/02 20:39:52 jim Exp $"""
+       
+
+from string import join, split, rfind
+from urllib import quote, unquote
+
+# Generified example of tree support a la discussion...
+
+class TreeProtocol:
+
+    def tpValues(self):
+	"""Return the immediate
+	subobjects of the current object that should be
+	shown in the tree.
+	"""
+
+    def tpId(self):
+	"""Return a value to be used as an id in tree state."""
+	
+
+    def tpURL(self):
+	"""Return string to be used as URL relative to parent."""

lib/python/TreeDisplay/TreeTag.py

+
+"""Rendering object hierarchies as Trees
+"""
+############################################################################
+#     Copyright 
+#
+#       Copyright 1997 Digital Creations, L.C., 910 Princess Anne
+#       Street, Suite 300, Fredericksburg, Virginia 22401 U.S.A. All
+#       rights reserved. 
+#
+############################################################################ 
+__rcs_id__='$Id: TreeTag.py,v 1.1 1997/09/02 20:39:53 jim Exp $'
+__version__='$Revision: 1.1 $'[11:-2]
+
+from DocumentTemplate.DT_Util import *
+from DocumentTemplate.DT_String import String
+
+class Tree:
+    name='tree'
+    blockContinuations=()
+
+    def __init__(self, blocks):
+	tname, args, section = blocks[0]
+	args=parse_params(args, name='')
+	name=name_param(args)
+	self.__name__ = name
+	self.section=section
+
+    def render(self,md):
+	try: v=md[self.__name__]
+	except: v=None
+	if v is None: return ''
+	return tpRender(v,md,self.section)
+
+    __call__=render
+
+String.commands['tree']=Tree
+
+from string import join, split, rfind
+from urllib import quote, unquote
+
+pyid=id # Copy builtin
+
+# Generified example of tree support a la discussion...
+
+def tpRender(self, md, section):
+    
+    # Check for collapse all, expand all, and state
+    try: collapse_all=md['collapse_all']
+    except: collapse_all=None
+    if collapse_all:
+	state=[]
+    else:
+	try: expand_all=md['expand_all']
+	except: expand_all=None
+	if expand_all:
+            # in case of expand all - to maintain state correctly we
+            # have to make state be the ids of ALL subobjects which
+            # are non-empty (recursively).
+            state=tpValuesIds(self)
+	else:
+            try:
+                state=md['state']
+                if state[0] != '[': state=unquote(state)
+                state=list(eval(state,{'__builtins__':{}}))
+            except: state=[]
+    
+    
+    # Try to save state in a cookie as well...
+    # md['RESPONSE'].setCookie('state',state)
+    
+    root=md['URL']
+    l=rfind(root, '/')
+    if l >= 0: root=root[l+1:]
+    
+    url=''
+
+    data =[]
+
+    data.append('<table cellspacing=0>\n')
+    colspan=1+tpStateLevel(state)
+
+    treeData={'tree-root-url': root}
+    md.push(treeData)
+    try:
+	for item in self.tpValues():
+	    data=tpRenderTABLE(item,root,url,state,state,data,colspan,
+			       section,md,treeData)
+
+	data.append('</table>\n')
+
+	result=join(data,'')
+    finally: md.pop(1)
+
+    return result
+
+def tpStateLevel(state):
+    level=0
+    for sub in state:
+        if len(sub)==2: level = max(level, 1+tpStateLevel(sub[1]))
+        else: level=max(level,1)
+    return level
+
+def tpValuesIds(self):
+    r=[]
+    try:
+	for item in self.tpValues():
+	    try:
+		id=item.tpId()
+		e=tpValuesIds(item)
+		if e: id=[id,e]
+		else: id=[id]
+		r.append(id)
+	    except: pass
+    except: pass
+    return r
+    
+
+def tpRenderTABLE(self, root_url, url, state, substate, data,
+                  colspan, section, md, treeData, level=0):
+
+    # We are being called from above
+
+    try: items=self.tpValues()
+    except: items=None
+
+    tpUrl=self.tpURL()
+    url = (url and ('%s/%s' % (url, tpUrl))) or tpUrl
+    treeData['tree-item-url']=url
+
+    try: id=self.tpId()
+    except: id=None
+    if id is None:
+	try: id=self._p_oid
+	except: id=None
+	if id is None: id=pyid(self)
+
+    exp=0
+    sub=None
+    output=data.append
+
+    # Add prefix
+    output('<tr>')
+    if level: output('<td></td>' * level)
+
+    # Add tree expand/contract icon
+    if items:
+        output('<td valign=top>')
+
+        for i in range(len(substate)):
+            sub=substate[i]
+            if sub[0]==id:
+                exp=i+1
+                break
+
+        if exp:
+            del substate[exp-1]
+            output('<A HREF="%s?state=%s">%s</A>' %
+                   (root_url,quote(str(state)[1:-1]+','), icoMinus))
+            substate.append(sub)
+        else:
+            substate.append([id])
+            output('<A HREF="%s?state=%s">%s</A>' %
+                   (root_url,quote(str(state)[1:-1]+','), icoPlus))
+            del substate[-1]
+    else:
+        output('<td>')
+
+    output('</td>\n')
+
+    # add item text
+    output('<td colspan=%s valign=top>' % colspan)
+    output(section(self, md))
+    output('</td></tr>\n')
+    
+    if exp:
+        for item in items:
+            if len(sub)==1: sub.append([])
+            data=tpRenderTABLE(item, root_url,url,state,sub[1],data,
+			       colspan, section, md, treeData, level+1)
+            if not sub[1]: del sub[1]
+
+    return data
+
+
+
+icoSpace='<IMG SRC="%s/TreeDisplay/Blank_icon.gif" ' \
+         ' BORDER="0">' % SOFTWARE_URL
+
+icoPlus ='<IMG SRC="%s/TreeDisplay/Plus_icon.gif" BORDER="0"'  \
+         ' ALT="+">' % SOFTWARE_URL
+
+icoMinus='<IMG SRC="%s/TreeDisplay/Minus_icon.gif" BORDER="0"' \
+         ' ALT="-">' % SOFTWARE_URL