utils.xml

GTK+-2.0源码之pango-1.15.6.tar.gz

<para>

</para><variablelist role="params">
<varlistentry><term><parameter>str</parameter>&nbsp;:</term>
<listitem><simpara> a string to parse.
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>stretch</parameter>&nbsp;:</term>
<listitem><simpara> a <link linkend="PangoStretch"><type>PangoStretch</type></link> to store the result in.
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>warn</parameter>&nbsp;:</term>
<listitem><simpara> if <link linkend="TRUE:CAPS"><literal>TRUE</literal></link>, issue a <link linkend="g-warning"><function>g_warning()</function></link> on bad input.
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> <link linkend="TRUE:CAPS"><literal>TRUE</literal></link> if <parameter>str</parameter> was successfully parsed.
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="pango-get-sysconf-subdirectory" role="function"/>pango_get_sysconf_subdirectory ()</title>
<indexterm><primary>pango_get_sysconf_subdirectory</primary></indexterm><programlisting>const <link linkend="char">char</link>* pango_get_sysconf_subdirectory  (void);</programlisting>
<para>
On Unix, returns the name of the "pango" subdirectory of SYSCONFDIR
(which is set at compile time). On Win32, returns a subdirectory of
the Pango installation directory (which is deduced at run time from
the DLL's location, or stored in the Registry).</para>
<para>

</para><variablelist role="params">
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> the Pango sysconf directory. The returned string should
not be freed.
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="pango-get-lib-subdirectory" role="function"/>pango_get_lib_subdirectory ()</title>
<indexterm><primary>pango_get_lib_subdirectory</primary></indexterm><programlisting>const <link linkend="char">char</link>* pango_get_lib_subdirectory      (void);</programlisting>
<para>
On Unix, returns the name of the "pango" subdirectory of LIBDIR
(which is set at compile time). On Win32, returns the Pango
installation directory (which is deduced at run time from the DLL's
location, or stored in the Registry). The returned string should
not be freed.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> the Pango lib directory. The returned string should
not be freed.
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="pango-log2vis-get-embedding-levels" role="function" condition="since:1.4"/>pango_log2vis_get_embedding_levels ()</title>
<indexterm role="1.4"><primary>pango_log2vis_get_embedding_levels</primary></indexterm><programlisting><link linkend="guint8">guint8</link>*     pango_log2vis_get_embedding_levels
                                            (const <link linkend="gchar">gchar</link> *text,
                                             <link linkend="int">int</link> length,
                                             <link linkend="PangoDirection">PangoDirection</link> *pbase_dir);</programlisting>
<para>
This will return the bidirectional embedding levels of the input paragraph
as defined by the Unicode Bidirectional Algorithm available at:
</para>
<para>
  http://www.unicode.org/reports/tr9/
</para>
<para>
If the input base direction is a weak direction, the direction of the
characters in the text will determine the final resolved direction.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>text</parameter>&nbsp;:</term>
<listitem><simpara>      the text to itemize.
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>length</parameter>&nbsp;:</term>
<listitem><simpara>    the number of bytes (not characters) to process, or -1
            if <parameter>text</parameter> is nul-terminated and the length should be calculated.
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>pbase_dir</parameter>&nbsp;:</term>
<listitem><simpara> input base direction, and output resolved direction.
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> a newly allocated array of embedding levels, one item per
              character (not byte), that should be freed using g_free.

</simpara></listitem></varlistentry>
</variablelist><para>Since  1.4
</para></refsect2>
<refsect2>
<title><anchor id="pango-language-get-default" role="function" condition="since:1.16"/>pango_language_get_default ()</title>
<indexterm role="1.16"><primary>pango_language_get_default</primary></indexterm><programlisting><link linkend="PangoLanguage">PangoLanguage</link>* pango_language_get_default   (void);</programlisting>
<para>
Returns the <link linkend="PangoLanguage"><type>PangoLanguage</type></link> for the current locale of the process.
Note that this can change over the life of an application.
</para>
<para>
On Unix systems, this is the return value is derived from
<literal>setlocale(LC_CTYPE, NULL)</literal>, and the user can
affect this through the environment variables LC_ALL, LC_CTYPE or
LANG (checked in that order). The locale string typically is in
the form lang_COUNTRY, where lang is an ISO-639 language code, and
COUNTRY is an ISO-3166 country code. For instance, sv_FI for
Swedish as written in Finland or pt_BR for Portuguese as written in
Brazil.
</para>
<para>
On Windows, the C library does not use any such environment
variables, and setting them won't affect the behavior of functions
like <link linkend="ctime"><function>ctime()</function></link>. The user sets the locale through the Regional Options
in the Control Panel. The C library (in the <link linkend="setlocale"><function>setlocale()</function></link> function)
does not use country and language codes, but country and language
names spelled out in English.
However, this function does check the above environment
variables, and does return a Unix-style locale string based on
either said environment variables or the thread's current locale.
</para>
<para>
Your application should call <literal>setlocale(LC_ALL, "");</literal>
for the user settings to take effect.  Gtk+ does this in its initialization
functions automatically (by calling <link linkend="gtk-set-locale"><function>gtk_set_locale()</function></link>).
See <literal>man setlocale</literal> for more details.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> the default language as a <link linkend="PangoLanguage"><type>PangoLanguage</type></link>, must not be
              freed.

</simpara></listitem></varlistentry>
</variablelist><para>Since  1.16
</para></refsect2>
<refsect2>
<title><anchor id="pango-language-get-sample-string" role="function"/>pango_language_get_sample_string ()</title>
<indexterm><primary>pango_language_get_sample_string</primary></indexterm><programlisting>const <link linkend="char">char</link>* pango_language_get_sample_string
                                            (<link linkend="PangoLanguage">PangoLanguage</link> *language);</programlisting>
<para>
Get a string that is representative of the characters needed to
render a particular language. This function is a bad hack for
internal use by renderers and Pango.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>language</parameter>&nbsp;:</term>
<listitem><simpara> a <link linkend="PangoLanguage"><type>PangoLanguage</type></link>
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> the sample string. This value is owned by Pango
  and must not be freed.
</simpara></listitem></varlistentry>
</variablelist></refsect2>
<refsect2>
<title><anchor id="pango-is-zero-width" role="function" condition="since:1.10"/>pango_is_zero_width ()</title>
<indexterm role="1.10"><primary>pango_is_zero_width</primary></indexterm><programlisting><link linkend="gboolean">gboolean</link>    pango_is_zero_width             (<link linkend="gunichar">gunichar</link> ch);</programlisting>
<para>
Checks <parameter>ch</parameter> to see if it is a character that should not be
normally rendered on the screen.  This includes all Unicode characters
with "ZERO WIDTH" in their name, as well as <firstterm>bidi</firstterm> formatting characters, and
a few other ones.  This is totally different from <link linkend="g-unichar-iszerowidth"><function>g_unichar_iszerowidth()</function></link>
and is at best misnamed.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>ch</parameter>&nbsp;:</term>
<listitem><simpara> a Unicode character
</simpara></listitem></varlistentry>
<varlistentry><term><emphasis>Returns</emphasis>&nbsp;:</term><listitem><simpara> <link linkend="TRUE:CAPS"><literal>TRUE</literal></link> if <parameter>ch</parameter> is a zero-width character, <link linkend="FALSE:CAPS"><literal>FALSE</literal></link> otherwise

</simpara></listitem></varlistentry>
</variablelist><para>Since  1.10
</para></refsect2>
<refsect2>
<title><anchor id="pango-quantize-line-geometry" role="function" condition="since:1.12"/>pango_quantize_line_geometry ()</title>
<indexterm role="1.12"><primary>pango_quantize_line_geometry</primary></indexterm><programlisting><link linkend="void">void</link>        pango_quantize_line_geometry    (<link linkend="int">int</link> *thickness,
                                             <link linkend="int">int</link> *position);</programlisting>
<para>
Quantizes the thickness and position of a line, typically an
underline or strikethrough, to whole device pixels, that is integer
multiples of <link linkend="PANGO-SCALE:CAPS"><literal>PANGO_SCALE</literal></link>. The purpose of this function is to avoid
such lines looking blurry.</para>
<para>

</para><variablelist role="params">
<varlistentry><term><parameter>thickness</parameter>&nbsp;:</term>
<listitem><simpara> pointer to the thickness of a line, in Pango scaled units
</simpara></listitem></varlistentry>
<varlistentry><term><parameter>position</parameter>&nbsp;:</term>
<listitem><simpara> corresponding position
</simpara></listitem></varlistentry>
</variablelist><para>Since  1.12
</para></refsect2>

</refsect1>




</refentry>