%%% Licensed under the Apache License, Version 2.0 (the "License");
%%% you may not use this file except in compliance with the License.
%%% You may obtain a copy of the License at
%%%
%%% http://www.apache.org/licenses/LICENSE-2.0
%%%
%%% Unless required by applicable law or agreed to in writing, software
%%% distributed under the License is distributed on an "AS IS" BASIS,
%%% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
%%% See the License for the specific language governing permissions and
%%% limitations under the License.
%%%
%%% The Original Code is xmerl-0.7
%%%
%%% The Initial Developer of the Original Code is Ericsson Telecom
%%% AB. Portions created by Ericsson are Copyright (C), 1998, Ericsson
%%% Telecom AB. All Rights Reserved.
%%%
%%% Contributor(s): ______________________________________.
%%%
%%%----------------------------------------------------------------------
%%% #0. BASIC INFORMATION
%%%----------------------------------------------------------------------
%%% File: test_html.erl
%%% Author : Ulf Wiger <[email protected]>
%%% Description : Callback module for exporting XML to HTML with support
%%% for special Erlang-related tags. (Experimental)
%%%
%%% Modules used : lists, io_lib
%%%
%%%----------------------------------------------------------------------
-module(test_html).
-author('[email protected]').
-export(['#xml-inheritance#'/0]).
%%% special Erlang forms
-export(['EXIT'/4,
'tuple_list'/4]).
-export(['#root#'/4,
title/4,
heading/4,
section/4,
table/4,
row/4,
col/4,
data/4,
p/4, para/4, 'P'/4,
emphasis/4]).
-include("xmerl.hrl").
'#xml-inheritance#'() -> [xmerl_xml].
%% The '#root#' tag is called when the entire structure has been exported.
%% It does not appear in the structure itself.
'#root#'(Data, Attrs, [], E) ->
Title =
case find_attribute(title, Attrs) of
{value, T} ->
["<title>", T, "</title>"];
false ->
[]
end,
["<!DOCTYPE HTML PUBLIC \"-//IETF//DTD HTML//EN\">\n"
"<html>\n",
"<head>\n", Title, "</head>\n"
"<body>\n", Data, "</body>\n"].
%%% Special token: EXIT
'EXIT'(Reason, Attrs = [], Parents = [], E) ->
%% This happens e.g. if a request function crashes completely.
["<pre>\n", mk_string({'EXIT', Reason}), "</pre>"].
title(Str, Attrs, Parents, E) ->
["<h1>", Str, "</h1>\n"].
%%% section/3 is to be used instead of headings.
section(Data, Attrs, [{section,_}, {section,_}, {section,_} | _], E) ->
opt_heading(Attrs, "<h4>", "</h4>", Data);
section(Data, Attrs, [{section,_}, {section,_} | _], E) ->
opt_heading(Attrs, "<h3>", "</h3>", Data);
section(Data, Attrs, [{section,_} | _], E) ->
opt_heading(Attrs, "<h2>", "</h2>", Data);
section(Data, Attrs, Parents, E) ->
opt_heading(Attrs, "<h1>", "</h1>", Data).
opt_heading(Attrs, StartTag, EndTag, Data) ->
case find_attribute(heading, Attrs) of
{value, Text} ->
[StartTag, Text, EndTag, "\n" | Data];
false ->
Data
end.
%% tables
%% e.g. {table, [{heading, [{col, H1}, {col, H2}]},
%% {row, [{col, C11}, {col, C12}]},
%% {row, [{col, C21}, {col, C22}]}]}.
table(Data, Attrs, Parents, E) ->
Border = case find_attribute(border, Attrs) of
false ->
" border=1";
{value, N} ->
[" border=", mk_string(N)]
end,
["<table", Border, ">\n", Data, "\n</table>\n"].
row(Data, Attrs, [{table,_}|_], E) ->
["<tr>", Data, "</tr>\n"].
heading(Data, Attrs, [{table,_}|_], E) ->
["<tr>", Data, "</tr>\n"].
%% Context-sensitive columns (heading- or row columns)
col(Data, Attrs, [{heading,_}, {table,_} | _], E) ->
["<th>", nbsp_if_empty(Data), "</th>\n"];
col(Data, Attrs, [{row,_}, {table,_} | _], E) ->
["<td>", nbsp_if_empty(Data), "</td>\n"].
tuple_list(List, Attrs, Parents, E) ->
Elems = case find_attribute(elements, Attrs) of
{value, Es} ->
Es;
false ->
case List of
[H|_] ->
lists:seq(1,size(H));
[] ->
[]
end
end,
TableData = [{row, [{col, {element(P, Rec)}} || P <- Elems]} ||
Rec <- List],
Table = case find_attribute(heading, Attrs) of
{value, Cols} ->
Head = {heading, [{col, C} || C <- Cols]},
{table, [Head | TableData]};
false ->
{table, TableData}
end,
{'#xml-redefine#', Table}.
data(Data, Pos, Attrs, Parents) ->
mk_string(Data).
p(Data, Pos, Attrs, Parents) ->
{'#xml-alias#', 'P'}.
para(Data, Pos, Attrs, Parents) ->
{'#xml-alias#', 'P'}.
'P'(Data, Pos, Attrs, Parents) ->
["<p>", mk_string(Data), "</p>\n"].
emphasis(Str, Pos, Attrs, Parents) ->
["<strong>", Str, "</strong>"].
nbsp_if_empty(Data) when binary(Data), size(Data) == 0 ->
" ";
nbsp_if_empty(Data) when list(Data) ->
case catch list_to_binary(Data) of
{'EXIT', _} ->
nbsp_if_empty_term(Data);
B when size(B) == 0 ->
" ";
_ ->
Data
end;
nbsp_if_empty(Data) ->
nbsp_if_empty_term(Data).
nbsp_if_empty_term(Data) ->
Str = io_lib:format("~p", [Data]),
case list_to_binary(Str) of
B when size(B) == 0 ->
" ";
_ ->
Str
end.
mk_string(I) when integer(I) ->
integer_to_list(I);
mk_string(A) when atom(A) ->
atom_to_list(A);
mk_string(L) when list(L) ->
%% again, we can't regognize a string without "parsing" it
case catch list_to_binary(L) of
{'EXIT',_} ->
io_lib:format("~p", [L]);
_ ->
L
end;
mk_string(Term) ->
io_lib:format("~p", [Term]).
find_attribute(Name, Attrs) ->
case lists:keysearch(Name, #xmlAttribute.name, Attrs) of
{value, #xmlAttribute{value = V}} ->
{value, V};
false ->
false
end.
