luatexja-fontspec.sty: Set the default scaling factor for Japanese fonts depending...

 * Add several comments.
 * Bump the version number to 0.2a.

diff --git a/src/addons/luatexja-fontspec.sty b/src/addons/luatexja-fontspec.sty
index b37b08f..4a037d6 100644 (file)
--- a/src/addons/luatexja-fontspec.sty
+++ b/src/addons/luatexja-fontspec.sty
@@ -3,12 +3,12 @@
 %
 
 \NeedsTeXFormat{LaTeX2e}
-\ProvidesPackage{luatexja-fontspec}[2011/09/23 v0.2]
+\ProvidesPackage{luatexja-fontspec}[2012/09/17 v0.2a]
 
 \RequirePackage{fontspec,luatexja}
-
 \ExplSyntaxOn
 
+%%%%%%%% Messages
 \cs_new:Npn \ltj_fontspec_warning:n   { \msg_warning:nn   {ltj-fontspec} }
 
 \msg_new:nnn {ltj-fontspec} {addjfontfeatures-ignored}
@@ -19,12 +19,22 @@
 
 \cs_generate_variant:Nn \prg_new_conditional:Nnn {Nnx}
 
+%%%%%%%% For compatibility with old fontspec.
 \prg_new_conditional:Nnx \ltj_fontspec_if_liiikeys: {TF,F} {
   \@ifpackagelater {fontspec} {2011/09/13}
   { \exp_not:N \prg_return_true: }  % fontspec >= 2.2 (l3keys)
   { \exp_not:N \prg_return_false: } % fontspec <  2.2 (xkeyval)
 }
 
+%%%%%%%% \g_ltj_fontspec_scale_fp
+%% Default scale value for jfont.
+\group_begin:
+\fontsize{10}{10}\selectfont
+\fp_gset:Nn \g_ltj_fontspec_scale_fp {\zw / 10}
+\group_end:
+
+%%%%%%%% Internal control sequences
+%% Each CS is ltj_fontspec version that corresponds to original CS of fontspec.
 \cs_new:Nn \ltj_fontspec_define_option:nn {
   \ltj_fontspec_if_liiikeys:TF {
     \keys_define:nn {fontspec} { #1 .code:n = {#2}}
@@ -70,7 +80,7 @@
     \tl_set:Nn \zf@enc {JY3}
   }
   \tl_set:Nx \g_fontspec_default_fontopts_tl
-             {JFM=ujis,Scale=0.962216,Kerning=Off,\g_ltj_fontspec_default_fontopts_tl}
+             {JFM=ujis,Scale=\fp_use:N \g_ltj_fontspec_scale_fp,Kerning=Off,\g_ltj_fontspec_default_fontopts_tl}
   \cs_set_eq:NN \DeclareFontFamily \DeclareKanjiFamily
   \fontspec_select:nn{#1}{#2}
   \group_end:
@@ -84,6 +94,7 @@
   \tl_set_eq:NN #1 \l_fontspec_family_tl
 }
 
+%%%%%%%% User commands
 \DeclareDocumentCommand \jfontspec { O{} m } {
   \ltj_fontspec_set_family:Nnn \k@family {#1}{#2}
   \selectfont