%% =====================================================================
%% 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.
%%
%% Alternatively, you may use this file under the terms of the GNU Lesser
%% General Public License (the "LGPL") as published by the Free Software
%% Foundation; either version 2.1, or (at your option) any later version.
%% If you wish to allow use of your version of this file only under the
%% terms of the LGPL, you should delete the provisions above and replace
%% them with the notice and other provisions required by the LGPL; see
%% <http://www.gnu.org/licenses/>. If you do not delete the provisions
%% above, a recipient may use your version of this file under the terms of
%% either the Apache License or the LGPL.
%%
%% @copyright 2003-2006 Richard Carlsson
%% @author Richard Carlsson <[email protected]>
%% @see edoc
%% @end
%% =====================================================================
%% @doc Standard doclet module for EDoc.
%% Note that this is written so that it is *not* depending on edoc.hrl!
%% TODO: copy "doc-files" subdirectories, recursively.
%% TODO: generate summary page of TODO-notes
%% TODO: generate summary page of deprecated things
%% TODO: generate decent indexes over modules, methods, records, etc.
-module(edoc_doclet).
-export([run/2]).
-import(edoc_report, [report/2, warning/2]).
%% @headerfile "../include/edoc_doclet.hrl"
-include("../include/edoc_doclet.hrl").
-define(EDOC_APP, edoc).
-define(DEFAULT_FILE_SUFFIX, ".html").
-define(INDEX_FILE, "index.html").
-define(OVERVIEW_FILE, "overview.edoc").
-define(OVERVIEW_SUMMARY, "overview-summary.html").
-define(MODULES_FRAME, "modules-frame.html").
-define(STYLESHEET, "stylesheet.css").
-define(IMAGE, "erlang.png").
-define(NL, "\n").
-include_lib("xmerl/include/xmerl.hrl").
%% Sources is the list of inputs in the order they were found.
%% Modules are sorted lists of atoms without duplicates. (They
%% usually include the data from the edoc-info file in the target
%% directory, if it exists.)
%% @spec (Command::doclet_gen() | doclet_toc(), edoc_context()) -> ok
%% @doc Main doclet entry point. See the file <a
%% href="../include/edoc_doclet.hrl">`edoc_doclet.hrl'</a> for the data
%% structures used for passing parameters.
%%
%% Also see {@link edoc:layout/2} for layout-related options, and
%% {@link edoc:get_doc/2} for options related to reading source
%% files.
%%
%% Options:
%% <dl>
%% <dt>{@type {file_suffix, string()@}}
%% </dt>
%% <dd>Specifies the suffix used for output files. The default value is
%% `".html"'.
%% </dd>
%% <dt>{@type {hidden, boolean()@}}
%% </dt>
%% <dd>If the value is `true', documentation of hidden modules and
%% functions will also be included. The default value is `false'.
%% </dd>
%% <dt>{@type {overview, edoc:filename()@}}
%% </dt>
%% <dd>Specifies the name of the overview-file. By default, this doclet
%% looks for a file `"overview.edoc"' in the target directory.
%% </dd>
%% <dt>{@type {private, boolean()@}}
%% </dt>
%% <dd>If the value is `true', documentation of private modules and
%% functions will also be included. The default value is `false'.
%% </dd>
%% <dt>{@type {stylesheet, string()@}}
%% </dt>
%% <dd>Specifies the URI used for referencing the stylesheet. The
%% default value is `"stylesheet.css"'. If an empty string is
%% specified, no stylesheet reference will be generated.
%% </dd>
%% <dt>{@type {stylesheet_file, edoc:filename()@}}
%% </dt>
%% <dd>Specifies the name of the stylesheet file. By default, this
%% doclet uses the file `"stylesheet.css"' in the `priv'
%% subdirectory of the EDoc installation directory. The named file
%% will be copied to the target directory.
%% </dd>
%% <dt>{@type {title, string()@}}
%% </dt>
%% <dd>Specifies the title of the overview-page.
%% </dd>
%% </dl>
%% INHERIT-OPTIONS: title/2
%% INHERIT-OPTIONS: sources/5
%% INHERIT-OPTIONS: overview/4
%% INHERIT-OPTIONS: copy_stylesheet/2
%% INHERIT-OPTIONS: stylesheet/1
run(#doclet_gen{}=Cmd, Ctxt) ->
gen(Cmd#doclet_gen.sources,
Cmd#doclet_gen.app,
Cmd#doclet_gen.modules,
Ctxt);
run(#doclet_toc{}=Cmd, Ctxt) ->
toc(Cmd#doclet_toc.paths, Ctxt).
gen(Sources, App, Modules, Ctxt) ->
Dir = Ctxt#context.dir,
Env = Ctxt#context.env,
Options = Ctxt#context.opts,
Title = title(App, Options),
CSS = stylesheet(Options),
{Modules1, Error} = sources(Sources, Dir, Modules, Env, Options),
modules_frame(Dir, Modules1, Title, CSS),
overview(Dir, Title, Env, Options),
index_file(Dir, Title),
edoc_lib:write_info_file(App, Modules1, Dir),
copy_stylesheet(Dir, Options),
copy_image(Dir),
%% handle postponed error during processing of source files
case Error of
true -> exit(error);
false -> ok
end.
%% NEW-OPTIONS: title
%% DEFER-OPTIONS: run/2
title(App, Options) ->
proplists:get_value(title, Options,
if App == ?NO_APP ->
"Overview";
true ->
io_lib:fwrite("Application: ~ts", [App])
end).
%% Processing the individual source files.
%% NEW-OPTIONS: file_suffix, private, hidden
%% INHERIT-OPTIONS: edoc:layout/2
%% INHERIT-OPTIONS: edoc:get_doc/3
%% DEFER-OPTIONS: run/2
sources(Sources, Dir, Modules, Env, Options) ->
Suffix = proplists:get_value(file_suffix, Options,
?DEFAULT_FILE_SUFFIX),
Private = proplists:get_bool(private, Options),
Hidden = proplists:get_bool(hidden, Options),
{Ms, E} = lists:foldl(fun (Src, {Set, Error}) ->
source(Src, Dir, Suffix, Env, Set,
Private, Hidden, Error, Options)
end,
{sets:new(), false}, Sources),
{[M || M <- Modules, sets:is_element(M, Ms)], E}.
%% Generating documentation for a source file, adding its name to the
%% set if it was successful. Errors are just flagged at this stage,
%% allowing all source files to be processed even if some of them fail.
source({M, Name, Path}, Dir, Suffix, Env, Set, Private, Hidden,
Error, Options) ->
File = filename:join(Path, Name),
case catch {ok, edoc:get_doc(File, Env, Options)} of
{ok, {Module, Doc}} ->
check_name(Module, M, File),
case ((not is_private(Doc)) orelse Private)
andalso ((not is_hidden(Doc)) orelse Hidden) of
true ->
Text = edoc:layout(Doc, Options),
Name1 = atom_to_list(M) ++ Suffix,
Encoding = [{encoding,encoding(Doc)}],
edoc_lib:write_file(Text, Dir, Name1, Encoding),
{sets:add_element(Module, Set), Error};
false ->
{Set, Error}
end;
R ->
report("skipping source file '~ts': ~tP.", [File, R, 15]),
{Set, true}
end.
check_name(M, M0, File) ->
N = M,
N0 = M0,
case N of
[$? | _] ->
%% A module name of the form '?...' is assumed to be caused
%% by the epp_dodger parser when the module declaration has
%% the form '-module(?MACRO).'; skip the filename check.
ok;
_ ->
if N =/= N0 ->
warning("file '~ts' actually contains module '~s'.",
[File, M]);
true ->
ok
end
end,
ok.
%% Creating an index file, with some frames optional.
%% TODO: get rid of frames, or change doctype to Frameset
index_file(Dir, Title) ->
Frame2 = {frame, [{src,?MODULES_FRAME},
{name,"modulesFrame"},{title,""}],
[]},
Frame3 = {frame, [{src,?OVERVIEW_SUMMARY},
{name,"overviewFrame"},{title,""}],
[]},
Frameset = {frameset, [{cols,"20%,80%"}],
[?NL, Frame2, ?NL, ?NL, Frame3, ?NL,
{noframes,
[?NL,
{h2, ["This page uses frames"]},
?NL,
{p, ["Your browser does not accept frames.",
?NL, br,
"You should go to the ",
{a, [{href, ?OVERVIEW_SUMMARY}],
["non-frame version"]},
" instead.", ?NL]},
?NL]},
?NL]},
XML = xhtml_1(Title, [], Frameset),
Text = xmerl:export_simple([XML], xmerl_html, []),
edoc_lib:write_file(Text, Dir, ?INDEX_FILE).
modules_frame(Dir, Ms, Title, CSS) ->
Body = [?NL,
{h2, [{class, "indextitle"}], ["Modules"]},
?NL,
{table, [{width, "100%"}, {border, 0},
{summary, "list of modules"}],
lists:append(
[[?NL,
{tr, [{td, [],
[{a, [{href, module_ref(M)},
{target, "overviewFrame"},
{class, "module"}],
[atom_to_list(M)]}]}]}]
|| M <- Ms])},
?NL],
XML = xhtml(Title, CSS, Body),
Text = xmerl:export_simple([XML], xmerl_html, []),
edoc_lib:write_file(Text, Dir, ?MODULES_FRAME).
module_ref(M) ->
atom_to_list(M) ++ ?DEFAULT_FILE_SUFFIX.
xhtml(Title, CSS, Content) ->
xhtml_1(Title, CSS, {body, [{bgcolor, "white"}], Content}).
xhtml_1(Title, CSS, Body) ->
{html, [?NL,
{head, [?NL, {title, [Title]}, ?NL] ++ CSS},
?NL,
Body,
?NL]
}.
%% NEW-OPTIONS: overview
%% INHERIT-OPTIONS: read_file/4
%% INHERIT-OPTIONS: edoc_lib:run_layout/2
%% INHERIT-OPTIONS: edoc_extract:file/4
%% DEFER-OPTIONS: run/2
overview(Dir, Title, Env, Opts) ->
File = proplists:get_value(overview, Opts,
filename:join(Dir, ?OVERVIEW_FILE)),
Encoding = edoc_lib:read_encoding(File, [{in_comment_only, false}]),
Tags = read_file(File, overview, Env, Opts),
Data0 = edoc_data:overview(Title, Tags, Env, Opts),
EncodingAttribute = #xmlAttribute{name = encoding,
value = atom_to_list(Encoding)},
#xmlElement{attributes = As} = Data0,
Data = Data0#xmlElement{attributes = [EncodingAttribute | As]},
F = fun (M) ->
M:overview(Data, Opts)
end,
Text = edoc_lib:run_layout(F, Opts),
EncOpts = [{encoding,Encoding}],
edoc_lib:write_file(Text, Dir, ?OVERVIEW_SUMMARY, EncOpts).
copy_image(Dir) ->
case code:priv_dir(?EDOC_APP) of
PrivDir when is_list(PrivDir) ->
From = filename:join(PrivDir, ?IMAGE),
edoc_lib:copy_file(From, filename:join(Dir, ?IMAGE));
_ ->
report("cannot find default image file.", []),
exit(error)
end.
%% NEW-OPTIONS: stylesheet_file
%% DEFER-OPTIONS: run/2
copy_stylesheet(Dir, Options) ->
case proplists:get_value(stylesheet, Options) of
undefined ->
From = case proplists:get_value(stylesheet_file, Options) of
File when is_list(File) ->
File;
_ ->
case code:priv_dir(?EDOC_APP) of
PrivDir when is_list(PrivDir) ->
filename:join(PrivDir, ?STYLESHEET);
_ ->
report("cannot find default "
"stylesheet file.", []),
exit(error)
end
end,
edoc_lib:copy_file(From, filename:join(Dir, ?STYLESHEET));
_ ->
ok
end.
%% NEW-OPTIONS: stylesheet
%% DEFER-OPTIONS: run/2
stylesheet(Options) ->
case proplists:get_value(stylesheet, Options) of
"" ->
[];
S ->
Ref = case S of
undefined ->
?STYLESHEET;
"" ->
""; % no stylesheet
S when is_list(S) ->
S;
_ ->
report("bad value for option 'stylesheet'.",
[]),
exit(error)
end,
[{link, [{rel, "stylesheet"},
{type, "text/css"},
{href, Ref},
{title, "EDoc"}], []},
?NL]
end.
is_private(E) ->
case get_attrval(private, E) of
"yes" -> true;
_ -> false
end.
is_hidden(E) ->
case get_attrval(hidden, E) of
"yes" -> true;
_ -> false
end.
encoding(E) ->
case get_attrval(encoding, E) of
"latin1" -> latin1;
_ -> utf8
end.
get_attrval(Name, #xmlElement{attributes = As}) ->
case get_attr(Name, As) of
[#xmlAttribute{value = V}] ->
V;
[] -> ""
end.
get_attr(Name, [#xmlAttribute{name = Name} = A | As]) ->
[A | get_attr(Name, As)];
get_attr(Name, [_ | As]) ->
get_attr(Name, As);
get_attr(_, []) ->
[].
%% Read external source file. Fails quietly, returning empty tag list.
%% INHERIT-OPTIONS: edoc_extract:file/4
read_file(File, Context, Env, Opts) ->
case edoc_extract:file(File, Context, Env, Opts) of
{ok, Tags} ->
Tags;
{error, _} ->
[]
end.
%% TODO: FIXME: meta-level index generation
%% Creates a Table of Content from a list of Paths (ie paths to applications)
%% and an overview file.
-define(EDOC_DIR, "doc").
-define(INDEX_DIR, "doc/index").
-define(CURRENT_DIR, ".").
toc(Paths, Ctxt) ->
Opts = Ctxt#context.opts,
Dir = Ctxt#context.dir,
Env = Ctxt#context.env,
app_index_file(Paths, Dir, Env, Opts).
%% TODO: FIXME: it's unclear how much of this is working at all
%% NEW-OPTIONS: title
%% INHERIT-OPTIONS: overview/4
app_index_file(Paths, Dir, Env, Options) ->
Title = proplists:get_value(title, Options,"Overview"),
% Priv = proplists:get_bool(private, Options),
CSS = stylesheet(Options),
Apps1 = [{filename:dirname(A),filename:basename(A)} || A <- Paths],
index_file(Dir, Title),
application_frame(Dir, Apps1, Title, CSS),
modules_frame(Dir, [], Title, CSS),
overview(Dir, Title, Env, Options),
% edoc_lib:write_info_file(Prod, [], Modules1, Dir),
copy_stylesheet(Dir, Options).
application_frame(Dir, Apps, Title, CSS) ->
Body = [?NL,
{h2, ["Applications"]},
?NL,
{table, [{width, "100%"}, {border, 0}],
lists:append(
[[{tr, [{td, [], [{a, [{href,app_ref(Path,App)},
{target,"_top"}],
[App]}]}]}]
|| {Path,App} <- Apps])},
?NL],
XML = xhtml(Title, CSS, Body),
Text = xmerl:export_simple([XML], xmerl_html, []),
edoc_lib:write_file(Text, Dir, ?MODULES_FRAME).
app_ref(Path,M) ->
filename:join([Path,M,?EDOC_DIR,?INDEX_FILE]).
