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%%%----------------------------------------------------------------------
%%% File : xml.erl
%%% Author : Alexey Shchepin <alexey@sevcom.net>
%%% Purpose : XML utils
%%% Created : 20 Nov 2002 by Alexey Shchepin <alexey@sevcom.net>
%%% Id : $Id$
%%%----------------------------------------------------------------------
-module(xml).
-author('alexey@sevcom.net').
-vsn('$Revision$ ').
-export([element_to_string/1, crypt/1, remove_cdata/1,
get_cdata/1, get_tag_cdata/1,
get_attr/2, get_attr_s/2,
get_tag_attr/2, get_tag_attr_s/2,
get_subtag/2,
get_path_s/2]).
element_to_string(El) ->
case El of
{xmlelement, Name, Attrs, Els} ->
if length(Els) > 0 ->
"<" ++ Name ++ attrs_to_string(Attrs) ++ ">" ++
lists:append(
lists:map(fun(E) -> element_to_string(E) end, Els))
++ "</" ++ Name ++ ">";
true ->
"<" ++ Name ++ attrs_to_string(Attrs) ++ "/>"
end;
{xmlcdata, CData} -> crypt(CData)
end.
attrs_to_string(Attrs) ->
lists:append(lists:map(fun(A) -> attr_to_string(A) end, Attrs)).
attr_to_string({Name, Value}) ->
" " ++ crypt(Name) ++ "='" ++ crypt(Value) ++ "'".
crypt(S) ->
lists:reverse(crypt(S, "")).
crypt([$& | S], R) ->
crypt(S, [$;, $p, $m, $a, $& | R]);
crypt([$< | S], R) ->
crypt(S, [$;, $t, $l, $& | R]);
crypt([$> | S], R) ->
crypt(S, [$;, $t, $g, $& | R]);
crypt([$" | S], R) ->
crypt(S, [$;, $t, $o, $u, $q, $& | R]);
crypt([$' | S], R) ->
crypt(S, [$;, $s, $o, $p, $a, $& | R]);
crypt([C | S], R) ->
crypt(S, [C | R]);
crypt([], R) ->
R.
remove_cdata(L) ->
lists:reverse(remove_cdata(L, [])).
remove_cdata([{xmlelement, Name, Attrs, Els} | L], R) ->
remove_cdata(L, [{xmlelement, Name, Attrs, Els} | R]);
remove_cdata([{xmlcdata, CData} | L], R) ->
remove_cdata(L, R);
remove_cdata([], R) ->
R.
get_cdata(L) ->
get_cdata(L, "").
get_cdata([{xmlcdata, CData} | L], S) ->
get_cdata(L, S ++ CData);
get_cdata([_ | L], S) ->
get_cdata(L, S);
get_cdata([], S) ->
S.
get_tag_cdata({xmlelement, Name, Attrs, Els}) ->
get_cdata(Els).
get_attr(AttrName, Attrs) ->
case lists:keysearch(AttrName, 1, Attrs) of
{value, {_, Val}} ->
{value, Val};
_ ->
false
end.
get_attr_s(AttrName, Attrs) ->
case lists:keysearch(AttrName, 1, Attrs) of
{value, {_, Val}} ->
Val;
_ ->
""
end.
get_tag_attr(AttrName, {xmlelement, Name, Attrs, Els}) ->
get_attr(AttrName, Attrs).
get_tag_attr_s(AttrName, {xmlelement, Name, Attrs, Els}) ->
get_attr_s(AttrName, Attrs).
get_subtag({xmlelement, _, _, Els}, Name) ->
get_subtag1(Els, Name).
get_subtag1([El | Els], Name) ->
case El of
{xmlelement, Name, _, _} ->
El;
_ ->
get_subtag1(Els, Name)
end;
get_subtag1([], _) ->
false.
get_path_s(El, []) ->
El;
get_path_s(El, [{elem, Name} | Path]) ->
case get_subtag(El, Name) of
false ->
"";
SubEl ->
get_path_s(SubEl, Path)
end;
get_path_s(El, [{attr, Name}]) ->
get_tag_attr_s(Name, El);
get_path_s(El, [cdata]) ->
get_tag_cdata(El).
|
