ucw-link: Better macros for URLs and URL links

[ucwmac.git] / ucwmac.tex

diff --git a/ucwmac.tex b/ucwmac.tex
index 6983e6ec9bbb093ffffa0c51582a01e607603413..bbee36d376e4aa3553613630549682d7fdc5e544 100644 (file)
--- a/ucwmac.tex
+++ b/ucwmac.tex
@@ -2,6 +2,8 @@
 % Written by Martin Mares <mj@ucw.cz> in 2010--2018 and placed into public domain
 % -------------------------------------------------------------------------------
 
+\ifx\ucwmodule\undefined\else\endinput\fi
+
 %%% Prolog %%%
 
 % We'll use internal macros of plain TeX
@@ -28,6 +30,8 @@
 \long\def\prependef#1#2{\expandafter\def\expandafter#1\expandafter{#2#1}}
 \long\def\appendef#1#2{\expandafter\def\expandafter#1\expandafter{#1#2}}
 
+\def\ucwwarn#1{\immediate\write16{*** Warning: #1 ***}}
+
 %%% Page size and margins %%%
 
 % If you modify these registers, call \setuppage afterwards
@@ -291,6 +295,38 @@
 \let\plaintilde=~
 \protected\def~{\plaintilde}
 
+%%% Localization %%%
+
+% Current language
+\def\localelang{en}
+
+% Define a new localized string: \localedef{language}{identifier}{message}
+\def\localedef#1#2{\expandafter\def\csname loc:#1:#2\endcsname}
+
+% Expand a localized string in the current language: \localemsg{identifier}
+\def\localestr#1{%
+       \ifcsname loc:\localelang:#1\endcsname
+               \csname loc:\localelang:#1\endcsname
+       \else
+               \ucwwarn{Localized string #1 not defined in language \localelang}%
+               ???%
+       \fi
+}
+
+%%% Modules %%%
+
+\def\ucwmodule#1{
+       \ifcsname ucwmod:#1\endcsname
+       \else
+               \input ucw-#1.tex
+       \fi
+}
+
+\def\ucwdefmodule#1{
+       \ifcsname ucwmod:#1\endcsname\endinput\fi
+       \expandafter\let\csname ucwmod:#1\endcsname=\relax
+}
+
 %%% Epilog %%%
 
 % Let's hide all internal macros