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Diffstat (limited to 'lib/xmerl/src/xmerl_otpsgml.erl')
| -rw-r--r-- | lib/xmerl/src/xmerl_otpsgml.erl | 162 |
1 files changed, 162 insertions, 0 deletions
diff --git a/lib/xmerl/src/xmerl_otpsgml.erl b/lib/xmerl/src/xmerl_otpsgml.erl new file mode 100644 index 0000000000..38688e788f --- /dev/null +++ b/lib/xmerl/src/xmerl_otpsgml.erl @@ -0,0 +1,162 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 2004-2009. All Rights Reserved. +%% +%% The contents of this file are subject to the Erlang Public License, +%% Version 1.1, (the "License"); you may not use this file except in +%% compliance with the License. You should have received a copy of the +%% Erlang Public License along with this software. If not, it can be +%% retrieved online at http://www.erlang.org/. +%% +%% Software distributed under the License is distributed on an "AS IS" +%% basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See +%% the License for the specific language governing rights and limitations +%% under the License. +%% +%% %CopyrightEnd% +%% + +%%% Description : Callback module for exporting XHTML to OTP-SGML. + +-module(xmerl_otpsgml). + +-export(['#xml-inheritance#'/0]). + +%% Note: we assume XML data, so all tags are lowercase! + +-export(['#root#'/4, + '#element#'/5, + '#text#'/1, + p/4]). + +-import(xmerl_lib, [markup/3, start_tag/2, is_empty_data/1, + export_text/1]). + +-include("xmerl.hrl"). + + +'#xml-inheritance#'() -> [xmerl_sgml]. + + +%% The '#text#' function is called for every text segment. + +'#text#'(Text) -> + export_text(Text). + + +%% The '#root#' tag is called when the entire structure has been +%% exported. It does not appear in the structure itself. + +'#root#'(Data, _Attrs, [], _E) -> + ["<!doctype erlref PUBLIC \"-//Stork//DTD erlref//EN\">\n",Data]. + + +%% Note that SGML does not have the <Tag/> empty-element form. +%% Furthermore, for some element types, the end tag is forbidden. (In +%% all other cases, we always generate the end tag, to make sure that +%% the scope of a markup is not extended by mistake.) + +'#element#'(Tag, Data, Attrs, _Parents, _E) -> +% io:format("parents:\n~p\n",[_Parents]), + case convert_tag(Tag,Attrs) of + {false,NewTag,NewAttrs} -> + markup(NewTag, NewAttrs, Data); + {true,NewTag,NewAttrs} -> + [start_tag(NewTag, NewAttrs), Data] + end. + + +%% HTML tags with special handling + +p(Data, Attrs, _Parents, _E) -> + %% In general, we cannot drop the end tag for paragraph elements; + %% that is only allowed if we know that it is immediately followed + %% by some other block-level tag. + case is_empty_data(Data) of + true -> + %% Paragraph elements should never be completely empty. + markup(p, Attrs, "\s"); + false -> + markup(p, Attrs, Data) + end. + + +%% Utility functions + +convert_tag(code,Attrs) -> convert_tag(c,Attrs); +convert_tag(strong,Attrs) -> convert_tag(em,Attrs); +convert_tag(b,Attrs) -> convert_tag(em,Attrs); +convert_tag(underline,Attrs) -> convert_tag(em,Attrs); % what is underline in sgml??? +convert_tag(dl,Attrs) -> convert_tag(taglist,Attrs); +convert_tag(dt,Attrs) -> convert_tag(tag,Attrs); +convert_tag(dd,Attrs) -> convert_tag(item,Attrs); +convert_tag(ul,Attrs) -> convert_tag(list,Attrs); +convert_tag(li,Attrs) -> convert_tag(item,Attrs); +convert_tag(tt,Attrs) -> convert_tag(c,Attrs); +%convert_tag(a, Attrs) -> convert_tag(seealso,convert_seealso_attrs(Attrs)); +convert_tag(a, Attrs) -> convert_tag(convert_aref(Attrs),convert_aref_attrs(convert_aref(Attrs),Attrs)); +convert_tag(Tag,Attrs) -> {forbid_end(Tag),Tag,Attrs}. + +convert_aref([#xmlAttribute{name = href, value = V}|_Rest]) -> + %% search if it is a html link, thus make it a 'url' ref otherwise + %% a 'seealso'. + case html_content(V) of + true -> + url; + _ -> + seealso + end; +convert_aref([#xmlAttribute{name = K}|Rest]) -> + io:format("Warning: ignoring attribute \'~p\' for tag \'a\'\n",[K]), + convert_aref(Rest). +convert_aref_attrs(url,Attrs) -> + Attrs; +convert_aref_attrs(SA,[#xmlAttribute{name = href, value = V}=A|Rest]) -> + [A#xmlAttribute{name=marker,value=V}|convert_aref_attrs(SA,Rest)]; +convert_aref_attrs(_,[])-> + []. +html_content([]) -> + false; +html_content([$.|Rest]) -> + case Rest of + "htm"++_EmaNfeR -> + true; + _ -> html_content(Rest) + end; +html_content([_H|T]) -> + html_content(T). + +% convert_seealso_attrs([#xmlAttribute{name = href, value = V} = A|Rest]) -> +% [A#xmlAttribute{name=marker,value=normalize_web_ref(V)}|convert_seealso_attrs(Rest)]; +% convert_seealso_attrs([#xmlAttribute{name = K}|Rest]) -> +% io:format("Warning: ignoring attribute \'~p\' for tag \'a\'\n",[K]), +% convert_seealso_attrs(Rest); +% convert_seealso_attrs([]) -> +% []. + +% normalize_web_ref(RefName) -> +% normalize_web_ref1(lists:reverse(RefName)). + +% normalize_web_ref1("lmth."++EmaNfeR) -> +% lists:reverse(EmaNfeR); +% normalize_web_ref1("mth"++EmaNfeR) -> +% lists:reverse(EmaNfeR); +% normalize_web_ref1(RefName) -> +% RefName. + +forbid_end(area) -> true; +forbid_end(base) -> true; +forbid_end(basefont) -> true; +forbid_end(br) -> true; +forbid_end(col) -> true; +forbid_end(frame) -> true; +forbid_end(hr) -> true; +forbid_end(img) -> true; +forbid_end(input) -> true; +forbid_end(isindex) -> true; +forbid_end(link) -> true; +forbid_end(marker) -> true; +forbid_end(meta) -> true; +forbid_end(param) -> true; +forbid_end(_) -> false. |