📄 arabicshaping.html
字号:
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN""http://www.w3.org/TR/REC-html40/loose.dtd">
<!--NewPage-->
<HTML>
<HEAD>
<!-- Generated by javadoc on Wed Nov 20 13:00:42 CET 2002 -->
<TITLE>
ArabicShaping
</TITLE>
<LINK REL ="stylesheet" TYPE="text/css" HREF="../../../../stylesheet.css" TITLE="Style">
</HEAD>
<SCRIPT>
function asd()
{
parent.document.title="ArabicShaping";
}
</SCRIPT>
<BODY BGCOLOR="white" onload="asd();">
<!-- ========== START OF NAVBAR ========== -->
<A NAME="navbar_top"><!-- --></A><TABLE BORDER="0" WIDTH="100%" CELLPADDING="1" CELLSPACING="0">
<TR>
<TD COLSPAN=3 BGCOLOR="#EEEEFF" CLASS="NavBarCell1">
<A NAME="navbar_top_firstrow"><!-- --></A><TABLE BORDER="0" CELLPADDING="0" CELLSPACING="3">
<TR ALIGN="center" VALIGN="top">
<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../overview-summary.html"><FONT CLASS="NavBarFont1"><B>Overview</B></FONT></A> </TD>
<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-summary.html"><FONT CLASS="NavBarFont1"><B>Package</B></FONT></A> </TD>
<TD BGCOLOR="#FFFFFF" CLASS="NavBarCell1Rev"> <FONT CLASS="NavBarFont1Rev"><B>Class</B></FONT> </TD>
<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="package-tree.html"><FONT CLASS="NavBarFont1"><B>Tree</B></FONT></A> </TD>
<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../deprecated-list.html"><FONT CLASS="NavBarFont1"><B>Deprecated</B></FONT></A> </TD>
<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../index-all.html"><FONT CLASS="NavBarFont1"><B>Index</B></FONT></A> </TD>
<TD BGCOLOR="#EEEEFF" CLASS="NavBarCell1"> <A HREF="../../../../help-doc.html"><FONT CLASS="NavBarFont1"><B>Help</B></FONT></A> </TD>
</TR>
</TABLE>
</TD>
<TD ALIGN="right" VALIGN="top" ROWSPAN=3><EM>
</EM>
</TD>
</TR>
<TR>
<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
PREV CLASS
<A HREF="../../../../com/lowagie/text/pdf/Barcode.html"><B>NEXT CLASS</B></A></FONT></TD>
<TD BGCOLOR="white" CLASS="NavBarCell2"><FONT SIZE="-2">
<A HREF="../../../../index.html" TARGET="_top"><B>FRAMES</B></A>
<A HREF="ArabicShaping.html" TARGET="_top"><B>NO FRAMES</B></A>
<SCRIPT> <!-- if(window==top) { document.writeln('<A HREF="../../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A>'); } //--></SCRIPT><NOSCRIPT><A HREF="../../../../allclasses-noframe.html" TARGET=""><B>All Classes</B></A></NOSCRIPT></FONT></TD>
</TR>
<TR>
<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
SUMMARY: NESTED | <A HREF="#field_summary">FIELD</A> | <A HREF="#constructor_summary">CONSTR</A> | <A HREF="#method_summary">METHOD</A></FONT></TD>
<TD VALIGN="top" CLASS="NavBarCell3"><FONT SIZE="-2">
DETAIL: <A HREF="#field_detail">FIELD</A> | <A HREF="#constructor_detail">CONSTR</A> | <A HREF="#method_detail">METHOD</A></FONT></TD>
</TR>
</TABLE>
<!-- =========== END OF NAVBAR =========== -->
<HR>
<!-- ======== START OF CLASS DATA ======== -->
<H2>
<FONT SIZE="-1">
com.lowagie.text.pdf</FONT>
<BR>
Class ArabicShaping</H2>
<PRE>
<A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">java.lang.Object</A>
|
+--<B>com.lowagie.text.pdf.ArabicShaping</B>
</PRE>
<HR>
<DL>
<DT>public final class <B>ArabicShaping</B><DT>extends <A HREF="http://java.sun.com/j2se/1.3/docs/api/java/lang/Object.html">Object</A></DL>
<P>
Shape Arabic text on a character basis. <p>ArabicShaping performs basic operations for "shaping" Arabic text. It is most useful for use with legacy data formats and legacy display technology (simple terminals). All operations are performed on Unicode characters.</p> <p>Text-based shaping means that some character code points in the text are replaced by others depending on the context. It transforms one kind of text into another. In comparison, modern displays for Arabic text select appropriate, context-dependent font glyphs for each text element, which means that they transform text into a glyph vector.</p> <p>Text transformations are necessary when modern display technology is not available or when text needs to be transformed to or from legacy formats that use "shaped" characters. Since the Arabic script is cursive, connecting adjacent letters to each other, computers select images for each letter based on the surrounding letters. This usually results in four images per Arabic letter: initial, middle, final, and isolated forms. In Unicode, on the other hand, letters are normally stored abstract, and a display system is expected to select the necessary glyphs. (This makes searching and other text processing easier because the same letter has only one code.) It is possible to mimic this with text transformations because there are characters in Unicode that are rendered as letters with a specific shape (or cursive connectivity). They were included for interoperability with legacy systems and codepages, and for unsophisticated display systems.</p> <p>A second kind of text transformations is supported for Arabic digits: For compatibility with legacy codepages that only include European digits, it is possible to replace one set of digits by another, changing the character code points. These operations can be performed for either Arabic-Indic Digits (U+0660...U+0669) or Eastern (Extended) Arabic-Indic digits (U+06f0...U+06f9).</p> <p>Some replacements may result in more or fewer characters (code points). By default, this means that the destination buffer may receive text with a length different from the source length. Some legacy systems rely on the length of the text to be constant. They expect extra spaces to be added or consumed either next to the affected character or at the end of the text.</p>
<P>
<P>
<HR>
<P>
<!-- ======== NESTED CLASS SUMMARY ======== -->
<!-- =========== FIELD SUMMARY =========== -->
<A NAME="field_summary"><!-- --></A><TABLE BORDER="1" CELLPADDING="3" CELLSPACING="0" WIDTH="100%">
<TR BGCOLOR="#CCCCFF" CLASS="TableHeadingColor">
<TD COLSPAN=2><FONT SIZE="+2">
<B>Field Summary</B></FONT></TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#ALEFTYPE">ALEFTYPE</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#araLink">araLink</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#convertFEto06">convertFEto06</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static char[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#convertLamAlef">convertLamAlef</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static char[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#convertNormalizedLamAlef">convertNormalizedLamAlef</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#DIGIT_TYPE_AN">DIGIT_TYPE_AN</A></B></CODE>
<BR>
Digit type option: Use Arabic-Indic digits (U+0660...U+0669).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#DIGIT_TYPE_AN_EXTENDED">DIGIT_TYPE_AN_EXTENDED</A></B></CODE>
<BR>
Digit type option: Use Eastern (Extended) Arabic-Indic digits (U+06f0...U+06f9).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#DIGIT_TYPE_MASK">DIGIT_TYPE_MASK</A></B></CODE>
<BR>
Bit mask for digit type options.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#DIGITS_AN2EN">DIGITS_AN2EN</A></B></CODE>
<BR>
Digit shaping option: Replace Arabic-Indic digits by European digits (U+0030...U+0039).</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#DIGITS_EN2AN">DIGITS_EN2AN</A></B></CODE>
<BR>
Digit shaping option: Replace European digits (U+0030...U+0039) by Arabic-Indic digits.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#DIGITS_EN2AN_INIT_AL">DIGITS_EN2AN_INIT_AL</A></B></CODE>
<BR>
Digit shaping option: Replace European digits (U+0030...U+0039) by Arabic-Indic digits if the most recent strongly directional character is an Arabic letter (its Bidi direction value is RIGHT_TO_LEFT_ARABIC). </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#DIGITS_EN2AN_INIT_LR">DIGITS_EN2AN_INIT_LR</A></B></CODE>
<BR>
Digit shaping option: Replace European digits (U+0030...U+0039) by Arabic-Indic digits if the most recent strongly directional character is an Arabic letter (its Bidi direction value is RIGHT_TO_LEFT_ARABIC). </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#DIGITS_MASK">DIGITS_MASK</A></B></CODE>
<BR>
Bit mask for digit shaping options.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#DIGITS_NOOP">DIGITS_NOOP</A></B></CODE>
<BR>
Digit shaping option: do not perform digit shaping.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#DIGITS_RESERVED">DIGITS_RESERVED</A></B></CODE>
<BR>
Not a valid option value.</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#IRRELEVANT">IRRELEVANT</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int[]</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#irrelevantPos">irrelevantPos</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private boolean</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#isLogical">isLogical</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>private static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#LAMTYPE">LAMTYPE</A></B></CODE>
<BR>
</TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#LENGTH_FIXED_SPACES_AT_BEGINNING">LENGTH_FIXED_SPACES_AT_BEGINNING</A></B></CODE>
<BR>
Memory option: the result must have the same length as the source. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#LENGTH_FIXED_SPACES_AT_END">LENGTH_FIXED_SPACES_AT_END</A></B></CODE>
<BR>
Memory option: the result must have the same length as the source. </TD>
</TR>
<TR BGCOLOR="white" CLASS="TableRowColor">
<TD ALIGN="right" VALIGN="top" WIDTH="1%"><FONT SIZE="-1">
<CODE>static int</CODE></FONT></TD>
<TD><CODE><B><A HREF="../../../../com/lowagie/text/pdf/ArabicShaping.html#LENGTH_FIXED_SPACES_NEAR">LENGTH_FIXED_SPACES_NEAR</A></B></CODE>
⌨️ 快捷键说明
复制代码
Ctrl + C
搜索代码
Ctrl + F
全屏模式
F11
切换主题
Ctrl + Shift + D
显示快捷键
?
增大字号
Ctrl + =
减小字号
Ctrl + -