diff options
Diffstat (limited to 'macros/luatex/optex/base/pdfuni-string.opm')
| -rw-r--r-- | macros/luatex/optex/base/pdfuni-string.opm | 58 |
1 files changed, 46 insertions, 12 deletions
diff --git a/macros/luatex/optex/base/pdfuni-string.opm b/macros/luatex/optex/base/pdfuni-string.opm index d7566eb91d..a289aae731 100644 --- a/macros/luatex/optex/base/pdfuni-string.opm +++ b/macros/luatex/optex/base/pdfuni-string.opm @@ -2,6 +2,11 @@ \_codedecl \pdfunidef {PDFunicode strings for outlines <2020-03-12>} % preloaded in format + \_doc ----------------------------- + The \`\_octalprint` is lua script which prints the character code in the + octal notation. + \_cod ----------------------------- + \_edef\_octalprint#1#2{\_noexpand\_directlua{% #1=character-code #2=character if ('#2'>='A' and '#2'<='Z') or ('#2'>='a' and '#2'<='z') then tex.print(string.format('000\_pcent s',"#2")) @@ -10,17 +15,34 @@ tex.print(string.format('\_pcent 03o\_nbb\_pcent03o',(#1-num)/256,num)) end }} + + \_doc ----------------------------- + \`\pdfunidef``\macro{<text>}` does more things than only converting to octal notation. + The <text> can be scanned in verbatim mode (it is true becuase \^`\_Xtoc` + reads the <text> in verbatim mode). First `\edef` do + `\_scantextokens\unexpanded` and second `\edef` expands the parameter + according to current values on selected macros from `\_regoul`. Then + \`\_removeoutmath` converts `..$x^2$..` to `..x^2..`, i.e removes dollars. + Then \`\_removeoutbraces` converts `..{x}..` to `..x..`. + Finaly, the <text> is detokenized, spaces are preprocessed using \^`\replstring` + and then the \`\_pdfunidefB` is repeated on each character. It calls the + `\directlua` chunk to print octal numbers in the macro \^`\_octalprint`. + \_cod ----------------------------- + \_def\_pdfunidef#1#2{% \_begingroup - \_catcode`\\=12 \_let\\=\_bslash \_the\_regoul \_relax % \_regmacro alternatives of logos etc. + \_ifx\_savedttchar\_undefined \_def#1{\_scantextokens{\_unexpanded{#2}}}% + \_else \_lccode`\;=\_savedttchar \_lowercase{\_prepinverb#1;}{#2}\fi + \_edef#1{#1}% \_escapechar=-1 - \_edef#1{#2\_empty}% + \_edef#1{#1\_empty}% \_escapechar=`\\ \_ea\_edef \_ea#1\_ea{\_ea\_removeoutmath #1$\_end$}% $x$ -> x \_ea\_edef \_ea#1\_ea{\_ea\_removeoutbraces #1{\_end}}% {x} -> x \_edef#1{\_detokenize\_ea{#1}}% \_replstring#1{ }{{ }}% text text -> text{ }text + \_catcode`\\=12 \_let\\=\_bslash \_edef\_out{\\376\\377}% \_ea\_pdfunidefB#1^% text -> \_out in octal \_ea @@ -39,6 +61,28 @@ \_def\_removeoutbracesA #1{\_ifx\_end#1\_else #1\_ea\_removeoutbraces\_fi} \_def\_removeoutmath #1$#2${#1\_ifx\_end#2\_else #2\_ea\_removeoutmath\_fi} + \_doc ----------------------------- + The \`\_prepinverb``<macro><separator>{<text>}`, + e.g.\ `\_prepinverb\tmpb|{aaa |bbb| cccc |dd| ee}` + does `\def\tmpb{<su>{aaa }bbb<su>{ cccc }dd<su>{ ee}}` where + <su> is `\scantextokens\unexpanded`. It means that in-line verbatim + are not argument of `\scantextoken`. First `\edef\tmpb` tokenizes again + the <text> but not the parts which were in the the in-line verbatim. + \_cod ----------------------------- + +\_def\_prepinverb#1#2#3{\_def#1{}% + \_def\_dotmpb ##1#2##2{\_addto#1{\_scantextokens{\_unexpanded{##1}}}% + \_ifx\_end##2\_else\_ea\_dotmpbA\_ea##2\_fi}% + \_def\_dotmpbA ##1#2{\_addto#1{##1}\_dotmpb}% + \_dotmpb#3#2\_end +} + + \_doc ----------------------------- + The \^`\regmacro` is used in order to sed the values of macros + `\em`, `\rm`, `\bf`, `\it`, `\bi`, `\tt`, `\/` and `~` to values usable in + PDF outlines. + \_cod ----------------------------- + \_regmacro {}{}{\_let\em=\_empty \_let\rm=\_empty \_let\bf=\_empty \_let\it=\_empty \_let\bi=\_empty \_let\tt=\_empty \_let\/=\_empty \_let~=\_space @@ -65,14 +109,4 @@ bytes FEFF. Moreover, each byte is encoded by three octal digits preceded by backslash. The only exception is the visible ASCII character encoding: such a character is encoded by its real byte preceded by `\000`. -The command \`\pdfunidef``\macro{string}` is implemented here -using `\directlua`. -The input string is preprocessed: detokenized, converted `\word /` to -`\word/` (used in logos) preprocessed spaces using \^`\replstring` and then the -\`\_pdfunidefB` is repeated on each character. It calls the `\directlua` chunk -to print octal numbers in the macro `\_octalprint`. - -The \^`\regmacro` is used in order to sed the values of macros -`\em`, `\rm`, `\bf`, `\it`, `\bi`, `\tt`, `\/` and `~` to values usable in -PDF outlines. |