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<?xml version="1.0" encoding="UTF-8"?>
<!--
<!DOCTYPE article PUBLIC "-//OASIS//DTD DocBook XML V4.2//EN"
"http://www.oasis-open.org/docbook/xml/4.2/docbookx.dtd">
-->

<!-- =================================================================== -->
<sect1 id="psm.i18n">
  <title>国际化</title>
  
  <para>要将软件开源,就需要它能说多种语言。让程序支持多语种,Pylons实现非常简单,
    用Python的gettext模组实现国际化。</para>
  
  <!-- ================================================================= -->
  <sect2 id="psm.i18n.gettext">
    <title>使用_()改写字符串输出</title>
 
    <para>函数_()实际上是gettext模组的 ugettext方法别名。将程序中出现的字符串输出改为
      _()调用。例如,在模板文件中:</para>
    
    <programlisting><![CDATA[
<tr>
<th>Account</th>
<th>Repository</th>
<th>Modules</th>
</tr>
]]></programlisting>

    <para>修改为</para>
    
    <programlisting><![CDATA[
<tr>
<th>${_("Account")}</th>
<th>${_("Repository")}</th>
<th>${_("Modules")}</th>
</tr>
]]></programlisting>

    <para>控制器代码中:</para>
    
    <programlisting><![CDATA[
def get_auth_path(self, repos=None, type=None, path=None):
..
msg += 'id[0]="%s";' % '...'
msg += 'name[0]="%s";\n' % "Please choose..."
]]></programlisting>
    
    <para>修改为:</para>
    
    <programlisting><![CDATA[
def get_auth_path(self, repos=None, type=None, path=None):
..
msg += 'id[0]="%s";' % '...'
msg += 'name[0]="%s";\n' % _("Please choose...")
]]></programlisting>

  </sect2>
  
  <!-- ================================================================= -->
  <sect2 id="psm.i18n.default">
    <title>根据浏览器喜好自动选择缺省语种</title>

    <programlisting><![CDATA[
from pylons.i18n import set_lang, add_fallback

class BaseController(WSGIController):
def __before__(self, action):

if 'lang' in session:
set_lang(session['lang'])
for lang in request.languages:
if lang in ['zh', 'en']:
add_fallback(lang)
]]></programlisting>

  </sect2>

  <!-- ================================================================= -->
  <sect2 id="psm.i18n.translate">
    <title>本地化翻译</title>

    <table id="psm.i18n.translate.tbl-1">
      <title>本地化翻译相关命令</title>
      <tgroup cols="2">
        <thead>
          <row>
            <entry>任务</entry>
            <entry>命令</entry>
          </row>
        </thead>
        <tbody>
          <row>
            <entry>提取待翻译字符串,保存为模板文件(*.pot)</entry>
            <entry>$ python setup.py extract_messages</entry>
          </row>
          <row>
            <entry>根据模板文件,创建本地语种文件(*.po)</entry>
            <entry>$ python setup.py init_catalog -l zh_CN</entry>
          </row>
          <row>
            <entry>翻译*.po文件(工具: kbabel)</entry>
            <entry>$ kbabel pySvnManager/i18n/zh/LC_MESSAGES/pysvnmanager.po</entry>
          </row>
          <row>
            <entry>编译*.po文件为*.mo文件</entry>
            <entry>$ python setup.py compile_catalog</entry>
          </row>
          <row>
            <entry>代码中字符串改变,重新提取模板文件(*.pot)</entry>
            <entry>$ python setup.py extract_messages</entry>
          </row>
          <row>
            <entry>用模板(*.pot)更新各语种的*.po文件</entry>
            <entry>$ python setup.py update_catalog</entry>
          </row>
          <row>
            <entry>翻译完毕,别忘了编译新的*.mo文件</entry>
            <entry>$ python setup.py compile_catalog</entry>
          </row>
        </tbody>
      </tgroup>
    </table>

  </sect2>
  
</sect1>
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