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Diffstat (limited to 'lib/common_test/src/erl2html2.erl')
| -rw-r--r-- | lib/common_test/src/erl2html2.erl | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/lib/common_test/src/erl2html2.erl b/lib/common_test/src/erl2html2.erl new file mode 100644 index 0000000000..7f3eb699de --- /dev/null +++ b/lib/common_test/src/erl2html2.erl @@ -0,0 +1,313 @@ +%% +%% %CopyrightBegin% +%% +%% Copyright Ericsson AB 1997-2016. All Rights Reserved. +%% +%% 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. +%% +%% %CopyrightEnd% +%% + +%%%------------------------------------------------------------------ +%%% Purpose:Convert Erlang files to html. +%%%------------------------------------------------------------------ + +-module(erl2html2). +-export([convert/3, convert/4]). + +convert([], _Dest, _InclPath) -> % Fake clause. + ok; +convert(File, Dest, InclPath) -> + %% The generated code uses the BGCOLOR attribute in the + %% BODY tag, which wasn't valid until HTML 3.2. Also, + %% good HTML should either override all colour attributes + %% or none of them -- *never* just a few. + %% + %% FIXME: The colours should *really* be set with + %% stylesheets... + %% + %% The html file is written with the same encoding as the input file. + Encoding = encoding(File), + Header = ["<!DOCTYPE HTML PUBLIC " + "\"-//W3C//DTD HTML 3.2 Final//EN\">\n" + "<!-- autogenerated by '",atom_to_list(?MODULE),"'. -->\n" + "<html>\n" + "<head>\n" + "<meta http-equiv=\"Content-Type\" content=\"text/html;" + "charset=",html_encoding(Encoding),"\"/></meta>\n" + "<title>", to_raw_list(File,Encoding), "</title>\n" + "</head>\n\n" + "<body bgcolor=\"white\" text=\"black\"" + " link=\"blue\" vlink=\"purple\" alink=\"red\">\n"], + convert(File, Dest, InclPath, Header). + + +convert(File, Dest, InclPath, Header) -> + %% statistics(runtime), + case parse_file(File, InclPath) of + {ok,Functions} -> + %% {_, Time1} = statistics(runtime), + %% io:format("Parsed file in ~.2f Seconds.~n",[Time1/1000]), + case file:open(File,[raw,{read_ahead,10000}]) of + {ok,SFd} -> + case file:open(Dest,[write,raw]) of + {ok,DFd} -> + ok = file:write(DFd,[Header,"<pre>\n"]), + _Lines = build_html(SFd,DFd,encoding(File),Functions), + ok = file:write(DFd,["</pre>\n",footer(), + "</body>\n</html>\n"]), + %% {_, Time2} = statistics(runtime), + %% io:format("Converted ~p lines in ~.2f Seconds.~n", + %% [_Lines, Time2/1000]), + ok = file:close(SFd), + ok = file:close(DFd), + ok; + Error -> + Error + end; + Error -> + Error + end; + Error -> + Error + end. + +%%%----------------------------------------------------------------- +%%% Parse the input file to get the line numbers for all function +%%% definitions. This will be used when creating link targets for each +%%% function in build_html/5. +%%% +%%% All function clauses are also marked in order to allow +%%% possibly_enhance/2 to write these in bold. +%%% +%%% Use expanded preprocessor directives if possible (epp). Only if +%%% this fails, fall back on using non-expanded code (epp_dodger). + +parse_file(File, InclPath) -> + case epp:open(File, InclPath, []) of + {ok,Epp} -> + try parse_preprocessed_file(Epp,File,false) of + Forms -> + epp:close(Epp), + {ok,Forms} + catch + _:{error,_Reason,true} -> + parse_non_preprocessed_file(File); + _:{error,_Reason,false} -> + {ok,[]} + end; + Error = {error,_} -> + Error + end. + +parse_preprocessed_file(Epp, File, InCorrectFile) -> + case epp:parse_erl_form(Epp) of + {ok,Form} -> + case Form of + {attribute,_,file,{File,_}} -> + parse_preprocessed_file(Epp, File, true); + {attribute,_,file,{_OtherFile,_}} -> + parse_preprocessed_file(Epp, File, false); + {function,L,F,A,Cs} when InCorrectFile -> + {CLs,LastCL} = find_clause_lines(Cs, []), + %% tl(CLs) cause we know the start line already + [{atom_to_list(F),A,get_line(L),LastCL} | tl(CLs)] ++ + parse_preprocessed_file(Epp, File, true); + _ -> + parse_preprocessed_file(Epp, File, InCorrectFile) + end; + {error,Reason={_L,epp,{undefined,_Macro,none}}} -> + throw({error,Reason,InCorrectFile}); + {error,_Reason} -> + parse_preprocessed_file(Epp, File, InCorrectFile); + {warning,_} -> + parse_preprocessed_file(Epp, File, InCorrectFile); + {eof,_Location} -> + [] + end. + +parse_non_preprocessed_file(File) -> + case file:open(File, []) of + {ok,Epp} -> + Forms = parse_non_preprocessed_file(Epp, File, 1), + ok = file:close(Epp), + {ok,Forms}; + Error = {error,_E} -> + Error + end. + +parse_non_preprocessed_file(Epp, File, Location) -> + case epp_dodger:parse_form(Epp, Location) of + {ok,Tree,Location1} -> + try erl_syntax:revert(Tree) of + {function,L,F,A,Cs} -> + {CLs,LastCL} = find_clause_lines(Cs, []), + %% tl(CLs) cause we know the start line already + [{atom_to_list(F),A,get_line(L),LastCL} | tl(CLs)] ++ + parse_non_preprocessed_file(Epp, File, Location1); + _ -> + parse_non_preprocessed_file(Epp, File, Location1) + catch + _:_ -> parse_non_preprocessed_file(Epp, File, Location1) + end; + {error,_E,Location1} -> + parse_non_preprocessed_file(Epp, File, Location1); + {eof,_Location} -> + [] + end. + +get_line(Anno) -> + erl_anno:line(Anno). + +%%%----------------------------------------------------------------- +%%% Find the line number of the last expression in the function +find_clause_lines([{clause,CL,_Params,_Op,Exprs}], CLs) -> % last clause + case classify_exprs(Exprs) of + {anno, Anno} -> + {lists:reverse([{clause,get_line(CL)}|CLs]), get_line(Anno)}; + {tree, Exprs1} -> + find_clause_lines([{clause,CL,undefined,undefined,Exprs1}], CLs); + unknown -> + {lists:reverse([{clause,get_line(CL)}|CLs]), get_line(CL)} + end; +find_clause_lines([{clause,CL,_Params,_Op,_Exprs} | Cs], CLs) -> + find_clause_lines(Cs, [{clause,get_line(CL)}|CLs]). + +classify_exprs(Exprs) -> + case tuple_to_list(lists:last(Exprs)) of + [macro,{_var,Anno,_MACRO} | _] -> + {anno, Anno}; + [T,ExprAnno | Exprs1] -> + case erl_anno:is_anno(ExprAnno) of + true -> + {anno, ExprAnno}; + false when T =:= tree -> + {tree, Exprs1}; + false -> + unknown + end + end. + +%%%----------------------------------------------------------------- +%%% Add a link target for each line and one for each function definition. +build_html(SFd,DFd,Encoding,FuncsAndCs) -> + build_html(SFd,DFd,Encoding,file:read_line(SFd),1,FuncsAndCs, + false,undefined). + +%% line of last expression in function found +build_html(SFd,DFd,Enc,{ok,Str},LastL,FuncsAndCs,_IsFuncDef,{F,LastL}) -> + LastLineLink = test_server_ctrl:uri_encode(F++"-last_expr",utf8), + ok = file:write(DFd,["<a name=\"", + to_raw_list(LastLineLink,Enc),"\"/>"]), + build_html(SFd,DFd,Enc,{ok,Str},LastL,FuncsAndCs,true,undefined); +%% function start line found +build_html(SFd,DFd,Enc,{ok,Str},L0,[{F,A,L0,LastL}|FuncsAndCs], + _IsFuncDef,_FAndLastL) -> + FALink = test_server_ctrl:uri_encode(F++"-"++integer_to_list(A),utf8), + ok = file:write(DFd,["<a name=\"",to_raw_list(FALink,Enc),"\"/>"]), + build_html(SFd,DFd,Enc,{ok,Str},L0,FuncsAndCs,true,{F,LastL}); +build_html(SFd,DFd,Enc,{ok,Str},L,[{clause,L}|FuncsAndCs], + _IsFuncDef,FAndLastL) -> + build_html(SFd,DFd,Enc,{ok,Str},L,FuncsAndCs,true,FAndLastL); +build_html(SFd,DFd,Enc,{ok,Str},L,FuncsAndCs,IsFuncDef,FAndLastL) -> + LStr = line_number(L), + Str1 = line(Str,IsFuncDef), + ok = file:write(DFd,[LStr,Str1]), + build_html(SFd,DFd,Enc,file:read_line(SFd),L+1,FuncsAndCs,false,FAndLastL); +build_html(_SFd,_DFd,_Enc,eof,L,_FuncsAndCs,_IsFuncDef,_FAndLastL) -> + L. + +line_number(L) -> + LStr = integer_to_list(L), + Pred = + case length(LStr) of + Length when Length < 5 -> + lists:duplicate(5-Length,$\s); + _ -> + [] + end, + ["<a name=\"",LStr,"\"/>",Pred,LStr,": "]. + +line(Str,IsFuncDef) -> + Str1 = htmlize(Str), + possibly_enhance(Str1,IsFuncDef). + +%%%----------------------------------------------------------------- +%%% Substitute special characters that should not appear in HTML +htmlize([$<|Str]) -> + [$&,$l,$t,$;|htmlize(Str)]; +htmlize([$>|Str]) -> + [$&,$g,$t,$;|htmlize(Str)]; +htmlize([$&|Str]) -> + [$&,$a,$m,$p,$;|htmlize(Str)]; +htmlize([$"|Str]) -> + [$&,$q,$u,$o,$t,$;|htmlize(Str)]; +htmlize([Ch|Str]) -> + [Ch|htmlize(Str)]; +htmlize([]) -> + []. + +%%%----------------------------------------------------------------- +%%% Write comments in italic and function definitions in bold. +possibly_enhance(Str,true) -> + case lists:splitwith(fun($() -> false; (_) -> true end, Str) of + {_,[]} -> Str; + {F,A} -> ["<b>",F,"</b>",A] + end; +possibly_enhance([$%|_]=Str,_) -> + ["<i>",Str--"\n","</i>","\n"]; +possibly_enhance([$-|_]=Str,_) -> + possibly_enhance(Str,true); +possibly_enhance(Str,false) -> + Str. + +%%%----------------------------------------------------------------- +%%% End of the file +footer() -> + "". + +%%%----------------------------------------------------------------- +%%% Read encoding from source file +encoding(File) -> + case epp:read_encoding(File) of + none -> + epp:default_encoding(); + E -> + E + end. + +%%%----------------------------------------------------------------- +%%% Covert encoding atom to string for use in HTML header +html_encoding(latin1) -> + "iso-8859-1"; +html_encoding(utf8) -> + "utf-8". + +%%%----------------------------------------------------------------- +%%% Convert a string to a list of raw printable characters in the +%%% given encoding. This is necessary since the files (source and +%%% destination) are both opened in raw mode (default encoding). Byte +%%% by byte is read from source and written to the destination. This +%%% conversion is needed when printing data that is not first read +%%% from the source. +%%% +%%% Example: if the encoding of the file is utf8, and we have a string +%%% containing "å" = [229], then we need to convert this to [195,165] +%%% before writing. Note that this conversion is only necessary +%%% because the destination file is not (necessarily) opened with utf8 +%%% encoding - it is opened with default encoding in order to allow +%%% raw file mode and byte by byte copying from source. +to_raw_list(X,latin1) when is_list(X) -> + X; +to_raw_list(X,utf8) when is_list(X) -> + binary_to_list(unicode:characters_to_binary(X)). |