[Zope] dtml-tree urlparam

Jonothan Farr jfarr@real.com
Mon, 18 Sep 2000 16:37:46 -0700


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I hacked this in already, but haven't gotten around to posting my patch. The
updated TreeTag.py file is attached. Copy it to your lib/python/TreeDisplay
directory. This is from a Zope 2.1.6 installation. You should use diff/patch if
you've upgraded.

--jfarr

----- Original Message -----
From: Júlio Dinis Silva <juliodinis@hotmail.com>
To: <zope@zope.org>
Sent: Monday, September 18, 2000 12:59 PM
Subject: [Zope] dtml-tree urlparam


> Hello all!
>
> Suppose I have a page who needs some dinamically generated params in order
> to be rendered.
> Suppose this page also has a dtml-tree. I found that to
> add extra params to the url created I can use the urlparam param :-)
>
> But suppose instead of passing "arg=1" I want to pass
> REQUEST['QUERY_STRING']. I thought urlparam would do the trick but
> using urlparam=QUERY_STRING the string passed is "QUERY_STRING" instead of
> the value of QUERY_STRING.
>
> Is there another param to do what I want or do I have to go into the
> source to hack dtml-tree to force to pass my QUERY_STRING parameters?
>
> thanx to all,
> Julio Dinis Silva
> _________________________________________________________________________
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Content-Type: text/x-python;
	name="TreeTag.py"
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	filename="TreeTag.py"

#########################################################################=
#####
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#####
"""Rendering object hierarchies as Trees
"""
__rcs_id__=3D'$Id: TreeTag.py,v 1.42 2000/06/01 13:48:08 jim Exp $'
__version__=3D'$Revision: 1.42 $'[11:-2]

from DocumentTemplate.DT_Util import *
from DocumentTemplate.DT_String import String

from string import join, split, rfind, find, translate
from urllib import quote, unquote
from zlib import compress, decompress
from binascii import b2a_base64, a2b_base64

tbl=3Djoin(map(chr, range(256)),'')
tplus=3Dtbl[:ord('+')]+'-'+tbl[ord('+')+1:]
tminus=3Dtbl[:ord('-')]+'+'+tbl[ord('-')+1:]

class Tree:
    name=3D'tree'
    blockContinuations=3D()
    expand=3DNone

    def __init__(self, blocks):
        tname, args, section =3D blocks[0]
        args=3Dparse_params(args, name=3DNone, expr=3DNone, nowrap=3D1,=20
                          expand=3DNone, leaves=3DNone,
                          header=3DNone, footer=3DNone,
                          table_header=3DNone,
                          branches=3DNone, branches_expr=3DNone,
                          sort=3DNone, reverse=3D1, =
skip_unauthorized=3D1,
                          id=3DNone, single=3D1, url=3DNone,
                          # opened_decoration=3DNone,
                          # closed_decoration=3DNone,
                          # childless_decoration=3DNone,
                          assume_children=3D1,
                          urlparam=3DNone,urlparam_expr=3DNone)
        has_key=3Dargs.has_key

        if has_key('name'): name=3Dargs['name']
        elif has_key(''): name=3Dargs['name']=3Dargs['']
        else: name=3D'a tree tag'

        if has_key('branches_expr'):
            if has_key('branches'):
                raise ParseError, _tm(
                    'branches and  and branches_expr given', 'tree')
            args['branches_expr']=3DVSEval.Eval(
                args['branches_expr'], expr_globals).eval
        elif not has_key('branches'): args['branches']=3D'tpValues'

        if has_key('urlparam_expr'):
            if has_key('urlparam'):
                raise ParseError, _tm(
                    'urlparam and  and urlparam_expr given', 'tree')
            args['urlparam_expr']=3DVSEval.Eval(
                args['urlparam_expr'], expr_globals).eval

        if not has_key('id'): args['id']=3D'tpId'
        if not has_key('url'): args['url']=3D'tpURL'
        if not has_key('childless_decoration'):
            args['childless_decoration']=3D''
       =20
        self.__name__ =3D name
        self.section=3Dsection.blocks
        self.args=3Dargs
        if args.has_key('expr'):
            if args.has_key('name'):
                raise ParseError, _tm('name and expr given', 'tree')
            args['expr']=3DVSEval.Eval(args['expr'], expr_globals)
           =20

    def render(self,md):
        args=3Dself.args
        have=3Dargs.has_key

        if have('name'): v=3Dmd[args['name']]
        elif have('expr'): v=3Dargs['expr'].eval(md)
        else: v=3Dmd.this
        return tpRender(v,md,self.section, self.args)

    __call__=3Drender

String.commands['tree']=3DTree

pyid=3Did # Copy builtin

def tpRender(self, md, section, args,
             simple_type=3D{type(''):0, type(1):0, =
type(1.0):0}.has_key):
    """Render data organized as a tree.

    We keep track of open nodes using a cookie.  The cookie stored the
    tree state. State should be a tree represented like:

      []  # all closed
      ['eagle'], # eagle is open
      ['eagle'], ['jeep', [1983, 1985]]  # eagle, jeep, 1983 jeep and =
1985 jeep

    where the items are object ids. The state will be converted to a
    compressed and base64ed string that gets unencoded, uncompressed,=20
    and evaluated on the other side.

    Note that ids used in state need not be connected to urls, since
    state manipulation is internal to rendering logic.

    Note that to make eval safe, we do not allow the character '*' in
    the state.
    """

    data=3D[]

    idattr=3Dargs['id']
    if hasattr(self, idattr):
        id=3Dgetattr(self, idattr)
        if not simple_type(type(id)): id=3Did()           =20
    elif hasattr(self, '_p_oid'): id=3Doid(self)
    else: id=3Dpyid(self)

    try:
        # see if we are being run as a sub-document
        root=3Dmd['tree-root-url']
        url=3Dmd['tree-item-url']
        state=3Dmd['tree-state']
        diff=3Dmd['tree-diff']
        substate=3Dmd['-tree-substate-']
        colspan=3Dmd['tree-colspan']     =20
        level=3Dmd['tree-level']

    except KeyError:
        # OK, we are a top-level invocation
        level=3D-1

        if md.has_key('collapse_all'):
            state=3D[id,[]],
        elif md.has_key('expand_all'):
            have_arg=3Dargs.has_key
            if have_arg('branches'):
                def get_items(node, branches=3Dargs['branches'], =
md=3Dmd):
                    validate=3Dmd.validate
                    if validate is None or not hasattr(node, =
'aq_acquire'):
                        items=3Dgetattr(node, branches)
                    else:
                        items=3Dnode.aq_acquire(branches, validate, md)
                    return items()
            elif have_arg('branches_expr'):
                def get_items(node, =
branches_expr=3Dargs['branches_expr'], md=3Dmd):
                    md._push(InstanceDict(node, md))
                    items=3Dbranches_expr(md)
                    md._pop()
                    return items
            state=3D[id, tpValuesIds(self, get_items, args)],
        else:
            if md.has_key('tree-s'):
                state=3Dmd['tree-s']
                state=3Ddecode_seq(state)
                try:
                    if state[0][0] !=3D id: state=3D[id,[]],
                except IndexError: state=3D[id,[]],
            else: state=3D[id,[]],

            if md.has_key('tree-e'):
                diff=3Ddecode_seq(md['tree-e'])
                apply_diff(state, diff, 1)

            if md.has_key('tree-c'):
                diff=3Ddecode_seq(md['tree-c'])
                apply_diff(state, diff, 0)

        colspan=3DtpStateLevel(state)
        substate=3Dstate
        diff=3D[]

        url=3D''
        root=3Dmd['URL']
        l=3Drfind(root,'/')
        if l >=3D 0: root=3Droot[l+1:]

    treeData=3D{'tree-root-url': root,
              'tree-colspan': colspan,
              'tree-state': state }
   =20
    md._push(InstanceDict(self, md))
    md._push(treeData)

    try: =
tpRenderTABLE(self,id,root,url,state,substate,diff,data,colspan,
                       section,md,treeData, level, args)
    finally: md._pop(2)

    if state is substate and not (args.has_key('single') and =
args['single']):
        state=3Dstate or ([id],)
        state=3Dencode_seq(state)
        md['RESPONSE'].setCookie('tree-s',state)

    return join(data,'')

def tpRenderTABLE(self, id, root_url, url, state, substate, diff, data,
                  colspan, section, md, treeData, level=3D0, =
args=3DNone,
                  simple_type=3D{type(''):0, type(1):0, =
type(1.0):0}.has_key,
                  ):
    "Render a tree as a table"

    have_arg=3Dargs.has_key
    exp=3D0

    if level >=3D 0:
        urlattr=3Dargs['url']
        if urlattr and hasattr(self, urlattr):
            tpUrl=3Dgetattr(self, urlattr)
            if not simple_type(type(tpUrl)): tpUrl=3DtpUrl()           =20
            url =3D (url and ('%s/%s' % (url, tpUrl))) or tpUrl
            root_url =3D root_url or tpUrl

    treeData['tree-item-url']=3Durl
    treeData['tree-level']=3Dlevel
    treeData['tree-item-expanded']=3D0
    idattr=3Dargs['id']

    output=3Ddata.append

    items=3DNone
    if (have_arg('assume_children') and args['assume_children']
        and substate is not state):
        # We should not compute children unless we have to.
        # See if we've been asked to expand our children.
        for i in range(len(substate)):
            sub=3Dsubstate[i]
            if sub[0]=3D=3Did:
                exp=3Di+1
                break
        if not exp: items=3D1

    if items is None:
        validate=3Dmd.validate
        if have_arg('branches') and hasattr(self, args['branches']):
            if validate is None or not hasattr(self, 'aq_acquire'):
                items=3Dgetattr(self, args['branches'])
            else:
                items=3Dself.aq_acquire(args['branches'],validate,md)
            items=3Ditems()
        elif have_arg('branches_expr'):
            items=3Dargs['branches_expr'](md)

        if not items and have_arg('leaves'): items=3D1

    if items and items !=3D 1:

        if validate is not None:
            unauth=3D[]
            index=3D0
            for i in items:
                try: v=3Dvalidate(items,items,None,i,md)
                except: v=3D0
                if not v: unauth.append(index)
                index=3Dindex+1

            if unauth:
                if have_arg('skip_unauthorized') and =
args['skip_unauthorized']:
                    items=3Dlist(items)
                    unauth.reverse()
                    for i in unauth: del items[i]
                else:
                    raise ValidationError, unauth

        if have_arg('sort'):
            # Faster/less mem in-place sort
            if type(items)=3D=3Dtype(()):
                items=3Dlist(items)
            sort=3Dargs['sort']
            size=3Drange(len(items))
            for i in size:
                v=3Ditems[i]
                k=3Dgetattr(v,sort)
                try:    k=3Dk()
                except: pass
                items[i]=3D(k,v)
            items.sort()
            for i in size:
                items[i]=3Ditems[i][1]

        if have_arg('reverse'):
            items=3Dlist(items)           # Copy the list
            items.reverse()

    diff.append(id)


    _td_colspan=3D'<TD COLSPAN=3D"%s" NOWRAP></TD>'
    _td_single =3D'<TD WIDTH=3D"16" NOWRAP></TD>'

    sub=3DNone
    if substate is state:
        output('<TABLE CELLSPACING=3D"0">\n')
        if have_arg('table_header'):
            doc=3Dargs['table_header']
            if md.has_key(doc): doc=3Dmd.getitem(doc,0)
            else: doc=3DNone
            if doc is not None:
                output(doc(
                    None, md,
                    standard_html_header=3D(
                        '<TR><TD WIDTH=3D"16" NOWRAP></TD>'
                        '<TD COLSPAN=3D%s VALIGN=3D"TOP">' % colspan),
                    standard_html_footer=3D'</TD></TR>',
                    ))
        sub=3Dsubstate[0]
        exp=3Ditems
    else:
        # Add prefix
        output('<TR>\n')

        # Add +/- icon
        if items:
            if level:
                if level > 3:   output(_td_colspan % (level-1))
                elif level > 1: output(_td_single * (level-1))
                output(_td_single)
                output('\n')
            output('<TD WIDTH=3D"16" VALIGN=3D"TOP" NOWRAP>')
            for i in range(len(substate)):
                sub=3Dsubstate[i]
                if sub[0]=3D=3Did:
                    exp=3Di+1
                    break

            ####################################
            # Mostly inline encode_seq for speed
            s=3Dcompress(str(diff))
            if len(s) > 57: s=3Dencode_str(s)
            else:
                s=3Db2a_base64(s)[:-1]
                l=3Dfind(s,'=3D')
                if l >=3D 0: s=3Ds[:l]
            s=3Dtranslate(s, tplus)
            ####################################

            script=3Dmd['SCRIPT_NAME']

            # Propagate extra args through tree.
            if args.has_key( 'urlparam' ):
                param =3D args['urlparam']
                param =3D "%s&" % param
            elif args.has_key('urlparam_expr'):
                urlparam_expr=3Dargs['urlparam_expr']
                param=3Durlparam_expr(md)
                param =3D "%s&" % param
            else:
                param =3D ""

            if exp:
                treeData['tree-item-expanded']=3D1
                output('<A NAME=3D"%s" HREF=3D"%s?%stree-c=3D%s#%s">'
                       '<IMG SRC=3D"%s/p_/mi" ALT=3D"-" BORDER=3D0></A>' =
%
                       (id, root_url, param, s, id, script))
            else:
                output('<A NAME=3D"%s" HREF=3D"%s?%stree-e=3D%s#%s">'
                       '<IMG SRC=3D"%s/p_/pl" ALT=3D"+" BORDER=3D0></A>' =
%
                       (id, root_url, param, s, id, script))
            output('</TD>\n')

        else:
            if level > 2:   output(_td_colspan % level)
            elif level > 0: output(_td_single  * level)
            output(_td_single)
            output('\n')
           =20
   =20
        # add item text
        dataspan=3Dcolspan-level
        output('<TD%s%s VALIGN=3D"TOP" ALIGN=3D"LEFT">' %
               ((dataspan > 1 and (' COLSPAN=3D"%s"' % dataspan) or ''),
               (have_arg('nowrap') and args['nowrap'] and ' NOWRAP' or =
''))
               )
        output(render_blocks(section, md))
        output('</TD>\n</TR>\n')


    if exp:

        level=3Dlevel+1
        dataspan=3Dcolspan-level
        if level > 2:   h=3D_td_colspan % level
        elif level > 0: h=3D_td_single  * level
        else: h=3D''

        if have_arg('header'):
            doc=3Dargs['header']
            if md.has_key(doc): doc=3Dmd.getitem(doc,0)
            else: doc=3DNone
            if doc is not None:
                output(doc(
                    None, md,
                    standard_html_header=3D(
                        '<TR>%s<TD WIDTH=3D"16" NOWRAP></TD>'
                        '<TD%s VALIGN=3D"TOP">'
                        % (h,
                           (dataspan > 1 and (' COLSPAN=3D"%s"' % =
dataspan)
                            or ''))),
                    standard_html_footer=3D'</TD></TR>',
                    ))
           =20
        if items=3D=3D1:
            # leaves
            if have_arg('leaves'):
                doc=3Dargs['leaves']
                if md.has_key(doc): doc=3Dmd.getitem(doc,0)
                else: doc=3DNone
                if doc is not None:
                    treeData['-tree-substate-']=3Dsub
                    treeData['tree-level']=3Dlevel
                    md._push(treeData)
                    try: output(doc(
                        None,md,
                        standard_html_header=3D(
                            '<TR>%s<TD WIDTH=3D"16" NOWRAP></TD>'
                            '<TD%s VALIGN=3D"TOP">'
                            % (h,
                               (dataspan > 1 and
                                (' COLSPAN=3D"%s"' % dataspan) or ''))),
                        standard_html_footer=3D'</TD></TR>',
                        ))
                    finally: md._pop(1)
        elif have_arg('expand'):
            doc=3Dargs['expand']
            if md.has_key(doc): doc=3Dmd.getitem(doc,0)
            else: doc=3DNone
            if doc is not None:
                treeData['-tree-substate-']=3Dsub
                treeData['tree-level']=3Dlevel
                md._push(treeData)
                try: output(doc(
                    None,md,
                    standard_html_header=3D(
                        '<TR>%s<TD WIDTH=3D"16" NOWRAP></TD>'
                        '<TD%s VALIGN=3D"TOP">'
                        % (h,
                           (dataspan > 1 and
                            (' COLSPAN=3D"%s"' % dataspan) or ''))),
                    standard_html_footer=3D'</TD></TR>',
                    ))
                finally: md._pop(1)
        else:
            __traceback_info__=3Dsub, args, state, substate
            ids=3D{}
            for item in items:
                if hasattr(item, idattr):
                    id=3Dgetattr(item, idattr)
                    if not simple_type(type(id)): id=3Did()
                elif hasattr(item, '_p_oid'): id=3Doid(item)
                else: id=3Dpyid(item)
                if len(sub)=3D=3D1: sub.append([])
                substate=3Dsub[1]
                ids[id]=3D1
                md._push(InstanceDict(item,md))
                try: data=3DtpRenderTABLE(
                    item,id,root_url,url,state,substate,diff,data,
                    colspan, section, md, treeData, level, args)
                finally: md._pop()
                if not sub[1]: del sub[1]

            ids=3Dids.has_key
            for i in range(len(substate)-1,-1):
                if not ids(substate[i][0]): del substate[i]

        if have_arg('footer'):
            doc=3Dargs['footer']
            if md.has_key(doc): doc=3Dmd.getitem(doc,0)
            else: doc=3DNone
            if doc is not None:
                output(doc(
                    None, md,
                    standard_html_header=3D(
                        '<TR>%s<TD WIDTH=3D"16" NOWRAP></TD>'
                        '<TD%s VALIGN=3D"TOP">'
                        % (h,
                           (dataspan > 1 and (' COLSPAN=3D"%s"' % =
dataspan)
                            or ''))),
                    standard_html_footer=3D'</TD></TR>',
                    ))

    del diff[-1]
    if not diff: output('</TABLE>\n')

    return data


def apply_diff(state, diff, expand):
    if not diff: return
    s=3D[None, state]
    diff.reverse()
    __traceback_info__=3Ds, diff
    while diff:
        id=3Ddiff[-1]
        del diff[-1]
        if len(s)=3D=3D1: s.append([])
        s=3Ds[1]
        loc=3D-1
        for i in range(len(s)):
            if s[i][0]=3D=3Did:
                loc=3Di
                break

        if loc >=3D 0:
            if not diff and not expand:
                del s[loc]
            else:
                s=3Ds[loc]
        elif diff or expand:
            s.append([id,[]])
            s=3Ds[-1][1]
            while diff:
                id=3Ddiff[-1]
                del diff[-1]
                if diff or expand:
                    s.append([id,[]])
                    s=3Ds[-1][1]


def encode_seq(state):
    "Convert a sequence to an encoded string"
    state=3Dcompress(str(state))
    l=3Dlen(state)

    if l > 57:
        states=3D[]
        for i in range(0,l,57):
            states.append(b2a_base64(state[i:i+57])[:-1])
        state=3Djoin(states,'')
    else: state=3Db2a_base64(state)[:-1]

    l=3Dfind(state,'=3D')
    if l >=3D 0: state=3Dstate[:l]
   =20
    state=3Dtranslate(state, tplus)
    return state

def encode_str(state):
    "Convert a sequence to an encoded string"
    l=3Dlen(state)

    if l > 57:
        states=3D[]
        for i in range(0,l,57):
            states.append(b2a_base64(state[i:i+57])[:-1])
        state=3Djoin(states,'')
    else: state=3Db2a_base64(state)[:-1]

    l=3Dfind(state,'=3D')
    if l >=3D 0: state=3Dstate[:l]
       =20
    state=3Dtranslate(state, tplus)
    return state

def decode_seq(state):
    "Convert an encoded string to a sequence"
    state=3Dtranslate(state, tminus)
    l=3Dlen(state)

    if l > 76:
        states=3D[]
        j=3D0
        for i in range(l/76):
            k=3Dj+76
            states.append(a2b_base64(state[j:k]))
            j=3Dk

        if j < l:
            state=3Dstate[j:]
            l=3Dlen(state)
            k=3Dl%4
            if k: state=3Dstate+'=3D'*(4-k)
            states.append(a2b_base64(state))
        state=3Djoin(states,'')
    else:
        l=3Dlen(state)
        k=3Dl%4
        if k: state=3Dstate+'=3D'*(4-k)
        state=3Da2b_base64(state)

    state=3Ddecompress(state)
    if find(state,'*') >=3D 0: raise 'Illegal State', state
    try: return list(eval(state,{'__builtins__':{}}))
    except: return []
   =20

def tpStateLevel(state, level=3D0):
    for sub in state:
        if len(sub)=3D=3D2: level =3D max(level, 1+tpStateLevel(sub[1]))
        else: level=3Dmax(level,1)
    return level

def tpValuesIds(self, get_items, args,
                simple_type=3D{type(''):0, type(1):0, =
type(1.0):0}.has_key,
                ):
    # get_item(node) is a function that returns the subitems of node

    # This should build the ids of subitems which are
    # expandable (non-empty). Leaves should never be
    # in the state - it will screw the colspan counting.
    r=3D[]
    idattr=3Dargs['id']
    try:
        try: items=3Dget_items(self)
        except AttributeError: items=3D()
        for item in items:
            try:
                if get_items(item):

                    if hasattr(item, idattr):
                        id=3Dgetattr(item, idattr)
                        if not simple_type(type(id)): id=3Did()          =
 =20
                    elif hasattr(item, '_p_oid'): id=3Doid(item)
                    else: id=3Dpyid(item)

                    e=3DtpValuesIds(item, get_items, args)
                    if e: id=3D[id,e]
                    else: id=3D[id]
                    r.append(id)
            except: pass
    except: pass
    return r


def oid(self):
    return b2a_base64(str(self._p_oid))[:-1]
   =20

#icoSpace=3D'<IMG SRC=3D"Blank_icon" BORDER=3D"0">'
#icoPlus =3D'<IMG SRC=3D"Plus_icon" BORDER=3D"0">'
#icoMinus=3D'<IMG SRC=3D"Minus_icon" BORDER=3D"0">'

------=_NextPart_000_0237_01C0218E.C6A7C410--