docs-xml/xslt/db2latex-xsl/xsl/normalize-scape.mod.xsl

   1 <?xml version='1.0'?>
   2 <!DOCTYPE xsl:stylesheet [ <!ENTITY % xsldoc.ent SYSTEM "./xsldoc.ent"> %xsldoc.ent; ]>
   3 <!--#############################################################################
   4 |       $Id: normalize-scape.mod.xsl,v 1.33 2004/01/26 09:40:12 j-devenish Exp $
   5 |- #############################################################################
   6 |       $Author: j-devenish $
   7 |
   8 |   PURPOSE:
   9 |       Escape LaTeX and normalize-space templates.
  10 |    < > # $ % & ~ _ ^ \ { } |
  11 + ############################################################################## -->
  12
  13 <xsl:stylesheet
  14         xmlns:xsl="http://www.w3.org/1999/XSL/Transform"
  15         xmlns:doc="http://nwalsh.com/xsl/documentation/1.0"
  16         exclude-result-prefixes="doc" version='1.0'>
  17
  18         <doc:reference id="normalize-scape" xmlns="">
  19                 <referenceinfo>
  20                         <releaseinfo role="meta">
  21                                 $Id: normalize-scape.mod.xsl,v 1.33 2004/01/26 09:40:12 j-devenish Exp $
  22                         </releaseinfo>
  23                         <authorgroup>
  24                                 &ramon;
  25                                 &james;
  26                         </authorgroup>
  27                         <copyright>
  28                                 <year>2000</year><year>2001</year><year>2002</year><year>2003</year>
  29                                 <holder>Ramon Casellas</holder>
  30                         </copyright>
  31                         <revhistory>
  32                                 <doc:revision rcasver="1.30">&rev_2003_05;</doc:revision>
  33                         </revhistory>
  34                 </referenceinfo>
  35                 <title>Whitespace Normalization and Character Encoding <filename>normalize-scape.mod.xsl</filename></title>
  36                 <partintro>
  37
  38                         <para>Normalize whitespace and and escape <quote>active</quote> &latex; characters.</para>
  39                         <para>Includes the auto-generated <filename>scape.mod.xsl</filename> module.</para>
  40
  41                 </partintro>
  42         </doc:reference>
  43
  44         <xsl:include href="scape.mod.xsl"/>
  45
  46         <doc:template match="text()" xmlns="">
  47                 <refpurpose>Process <literal>text()</literal> nodes</refpurpose>
  48                 <doc:description>
  49                         <para>
  50
  51                                 Handles regular text content (i.e. <literal>#PCDATA</literal>)
  52                                 from &docbook; documents.
  53
  54                         </para>
  55                 </doc:description>
  56                 <doc:variables>
  57                         &no_var;
  58                 </doc:variables>
  59                 <doc:notes>
  60                         <para>
  61
  62                                 For most elements, &latex; active characters
  63                                 will be escaped using the <xref linkend="template.scape"/>
  64                                 template.
  65                                 However, for text within the following elements, the
  66                                 <xref linkend="template.scape-verbatim"/> template
  67                                 will be used to typeset monospace text:
  68                                 <doc:db>literal</doc:db>,
  69                                 <doc:db>filename</doc:db>,
  70                                 <doc:db>userinput</doc:db>,
  71                                 <doc:db>systemitem</doc:db>,
  72                                 <doc:db>prompt</doc:db>,
  73                                 <doc:db>email</doc:db>,
  74                                 <doc:db>sgmltag</doc:db>.
  75
  76                         </para>
  77                         <para>
  78
  79                                 In all cases, interior whitespace will be normalised according
  80                                 to the XSLT specification with the additional feature that
  81                                 leading and trailing whitespace will be elided (as expected
  82                                 with SGML parsers).
  83
  84                         </para>
  85                 </doc:notes>
  86                 <doc:seealso>
  87                         <itemizedlist>
  88                                 <listitem><simpara><xref linkend="gentext"/></simpara></listitem>
  89                                 <listitem><simpara><xref linkend="param.latex.inputenc"/></simpara></listitem>
  90                         </itemizedlist>
  91                 </doc:seealso>
  92         </doc:template>
  93         <xsl:template match="text()" name="text">
  94                 <xsl:call-template name="trim-outer">
  95                         <xsl:with-param name="string">
  96                                 <xsl:choose>
  97                                         <xsl:when test="ancestor::literal|ancestor::filename|ancestor::userinput|ancestor::systemitem|ancestor::prompt|ancestor::email|ancestor::sgmltag">
  98                                                 <xsl:call-template name="scape-verbatim">
  99                                                         <xsl:with-param name="string" select="."/>
 100                                                 </xsl:call-template>
 101                                         </xsl:when>
 102                                         <xsl:otherwise>
 103                                                 <xsl:call-template name="scape">
 104                                                         <xsl:with-param name="string" select="."/>
 105                                                 </xsl:call-template>
 106                                         </xsl:otherwise>
 107                                 </xsl:choose>
 108                         </xsl:with-param>
 109                 </xsl:call-template>
 110         </xsl:template>
 111
 112         <!--
 113         <xsl:template match="abbrev/text()">
 114                 <xsl:variable name="string">
 115                         <xsl:call-template name="text"/>
 116                 </xsl:variable>
 117                 <xsl:call-template name="string-replace">
 118                         <xsl:with-param name="to">.\ </xsl:with-param>
 119                         <xsl:with-param name="from">. </xsl:with-param>
 120                         <xsl:with-param name="string" select="$string"/>
 121                 </xsl:call-template>
 122         </xsl:template>
 123         -->
 124
 125         <doc:template match="text()" mode="xref.text" xmlns="">
 126                 <refpurpose>Process <literal>text()</literal> nodes</refpurpose>
 127                 <doc:description>
 128                         <para>
 129
 130                                 Handles regular text content (i.e. <literal>#PCDATA</literal>)
 131                                 from &docbook; documents when they are forming the displayed
 132                                 text of an <doc:db>xref</doc:db>.
 133
 134                         </para>
 135                 </doc:description>
 136                 <doc:variables>
 137                         &no_var;
 138                 </doc:variables>
 139                 <doc:notes>
 140                         <para>
 141
 142                                 &latex; active characters will be escaped using the <xref
 143                                 linkend="template.scape"/> template.
 144
 145                         </para>
 146                         <para>
 147
 148                                 In all cases, interior whitespace will be normalised according
 149                                 to the XSLT specification with the additional feature that
 150                                 leading and trailing whitespace will be elided (as expected
 151                                 with SGML parsers).
 152
 153                         </para>
 154                 </doc:notes>
 155         </doc:template>
 156     <xsl:template match="text()" mode="xref.text">
 157                 <xsl:call-template name="trim-outer">
 158                         <xsl:with-param name="string">
 159                                 <xsl:call-template name="scape">
 160                                         <xsl:with-param name="string" select="."/>
 161                                 </xsl:call-template>
 162                         </xsl:with-param>
 163                 </xsl:call-template>
 164     </xsl:template>
 165
 166         <doc:template match="text()" mode="xref-to" xmlns="">
 167                 <refpurpose>Process <literal>text()</literal> nodes</refpurpose>
 168                 <doc:description>
 169                         <para>
 170
 171                                 Handles regular text content (i.e. <literal>#PCDATA</literal>)
 172                                 from &docbook; documents when they are forming the displayed
 173                                 text of an <doc:db>xref</doc:db>.
 174
 175                         </para>
 176                 </doc:description>
 177                 <doc:variables>
 178                         &no_var;
 179                 </doc:variables>
 180                 <doc:notes>
 181                         <para>
 182
 183                                 &latex; active characters will be escaped using the <xref
 184                                 linkend="template.scape"/> template.
 185
 186                         </para>
 187                         <para>
 188
 189                                 In all cases, interior whitespace will be normalised according
 190                                 to the XSLT specification with the additional feature that
 191                                 leading and trailing whitespace will be elided (as expected
 192                                 with SGML parsers).
 193
 194                         </para>
 195                 </doc:notes>
 196         </doc:template>
 197     <xsl:template match="text()" mode="xref-to">
 198                 <xsl:call-template name="trim-outer">
 199                         <xsl:with-param name="string">
 200                                 <xsl:call-template name="scape">
 201                                         <xsl:with-param name="string" select="."/>
 202                                 </xsl:call-template>
 203                         </xsl:with-param>
 204                 </xsl:call-template>
 205     </xsl:template>
 206
 207         <doc:template match="text()" mode="latex.verbatim" xmlns="">
 208                 <refpurpose>Process <literal>text()</literal> nodes</refpurpose>
 209                 <doc:description>
 210                         <para>
 211
 212                                 Handles regular text content (i.e. <literal>#PCDATA</literal>)
 213                                 from &docbook; documents with they occur within certain
 214                                 <quote>verbatim</quote>-mode elements.
 215
 216                         </para>
 217                 </doc:description>
 218                 <doc:variables>
 219                         <variablelist>
 220                                 <varlistentry>
 221                                         <term><xref linkend="param.latex.trim.verbatim"/></term>
 222                                         <listitem><simpara>
 223                                                 When this variable is enabled, leading and trailing whitespace
 224                                                 will be elided. Otherwise, all text is used verbatim.
 225                                         </simpara></listitem>
 226                                 </varlistentry>
 227                         </variablelist>
 228                 </doc:variables>
 229                 <doc:notes>
 230                         <para>
 231
 232                                 Unlike other <literal>text()</literal> templates, &latex;
 233                                 characters are not escaped by this template. This will result
 234                                 in invalid output in some instances. However, it is currently
 235                                 necessary for <quote>verbatim</quote>-mode support. Whitespace
 236                                 is neither normalised nor elided.
 237
 238                         </para>
 239                 </doc:notes>
 240         </doc:template>
 241     <xsl:template match="text()" mode="latex.verbatim">
 242                 <xsl:choose>
 243                         <xsl:when test="$latex.trim.verbatim=1">
 244                                 <xsl:call-template name="trim.verbatim"/>
 245                         </xsl:when>
 246                         <xsl:otherwise>
 247                                 <xsl:value-of select="."/>
 248                         </xsl:otherwise>
 249                 </xsl:choose>
 250     </xsl:template>
 251
 252         <doc:template match="text()" mode="slash.hyphen" xmlns="">
 253                 <refpurpose>Process <literal>text()</literal> nodes</refpurpose>
 254                 <doc:description>
 255                         <para>
 256
 257                                 Handles URL text content from &docbook; documents.
 258
 259                         </para>
 260                 </doc:description>
 261                 <doc:variables>
 262                         &no_var;
 263                 </doc:variables>
 264                 <doc:notes>
 265                         <para>
 266
 267                                 This template is only used by <xref
 268                                 linkend="template.generate.string.url"/> and only when <xref
 269                                 linkend="param.latex.hyphenation.tttricks"/> is disabled.
 270                                 &latex; active characters will be escaped or hyphenated in a
 271                                 fashion that is tailored for URLs via
 272                                 <xref linkend="template.scape.slash.hyphen"/>.
 273
 274                         </para>
 275                 </doc:notes>
 276         </doc:template>
 277     <xsl:template match="text()" mode="slash.hyphen">
 278                 <xsl:call-template name="trim-outer">
 279                         <xsl:with-param name="string">
 280                                 <xsl:call-template name="scape.slash.hyphen">
 281                                         <xsl:with-param name="string" select="." />
 282                                 </xsl:call-template>
 283                         </xsl:with-param>
 284                 </xsl:call-template>
 285         </xsl:template>
 286
 287         <doc:template name="trim-outer" xmlns="">
 288                 <refpurpose>Whitespace Normalization and Discretionary Elision</refpurpose>
 289                 <doc:description>
 290                         <para>
 291
 292                                 This template is used by various <literal>text()</literal>
 293                                 templates to normalise interior whitespace and trim whitespace
 294                                 that occurs at the start or end of a &docbook; element's
 295                                 content.
 296
 297                         </para>
 298                 </doc:description>
 299                 <doc:variables>
 300                         &no_var;
 301                 </doc:variables>
 302                 <doc:params>
 303                         <variablelist>
 304                                 <varlistentry>
 305                                         <term>string</term>
 306                                         <listitem><simpara>The text to be processed.</simpara></listitem>
 307                                 </varlistentry>
 308                         </variablelist>
 309                 </doc:params>
 310                 <doc:notes>
 311                         <para>
 312
 313                                 The template is normally called when the context node is within
 314                                 a &docbook; document. The elision of leading or trailing
 315                                 whitespace is dependent on values of the XPath functions
 316                                 <function condition="xpath">position()</function> and <function
 317                                 condition="xpath">last()</function>. This is similar to the
 318                                 handling of whitespace by SGML parsers and allows authors to
 319                                 format their XML documents with <quote>pretty</quote>
 320                                 indentation without causing spurious whitespace in &latex;.
 321
 322                         </para>
 323                         <para>
 324
 325                                 In all cases, interiour whitespace will be normalised with the
 326                                 XPath <function condition="xpath">normalize-space()</function>
 327                                 function. This is necessary to prevent blank-line problems in
 328                                 &latex;.
 329
 330                         </para>
 331                 </doc:notes>
 332         </doc:template>
 333         <xsl:template name="trim-outer">
 334                 <xsl:param name="string"/>
 335                 <xsl:variable name="trimleft" select="position()=1"/>
 336                 <xsl:variable name="trimright" select="position()=last()"/>
 337                 <xsl:choose>
 338                         <xsl:when test="$trimleft and not($trimright)">
 339                                 <xsl:value-of select="substring-before(normalize-space(concat($string,'$$')),'$$')"/>
 340                         </xsl:when>
 341                         <xsl:when test="$trimright and not($trimleft)">
 342                                 <xsl:value-of select="substring-after(normalize-space(concat('$$',$string)),'$$')"/>
 343                         </xsl:when>
 344                         <xsl:when test="$trimleft and $trimright">
 345                                 <xsl:value-of select="normalize-space($string)"/>
 346                         </xsl:when>
 347                         <xsl:otherwise>
 348                                 <xsl:value-of select="substring-after(substring-before(normalize-space(concat('$$',$string,'$$$')),'$$$'),'$$')"/>
 349                         </xsl:otherwise>
 350                 </xsl:choose>
 351         </xsl:template>
 352
 353         <doc:template name="scape.slash.hyphen" xmlns="">
 354                 <refpurpose>Process URL text</refpurpose>
 355                 <doc:description>
 356                         <para>
 357
 358                                 Escapes or hyphenates &latex; active characters is URLs.
 359
 360                         </para>
 361                 </doc:description>
 362                 <doc:variables>
 363                         &no_var;
 364                 </doc:variables>
 365                 <doc:params>
 366                         <variablelist>
 367                                 <varlistentry>
 368                                         <term>string</term>
 369                                         <listitem><simpara>The URL text to be processed.</simpara></listitem>
 370                                 </varlistentry>
 371                         </variablelist>
 372                 </doc:params>
 373                 <doc:notes>
 374                         <para>
 375
 376                                 This template is called by <xref
 377                                 linkend="template.text()-slash.hyphen"/>. Text will be escaped
 378                                 and hyphenated by the <xref linkend="template.scape-slash"/>
 379                                 template, except that any portion up to <literal>://</literal>
 380                                 will not be treated specially.
 381
 382                         </para>
 383                 </doc:notes>
 384         </doc:template>
 385         <xsl:template name="scape.slash.hyphen">
 386         <xsl:param name="string" />
 387         <xsl:choose>
 388                 <xsl:when test="contains($string,'://')">
 389                         <xsl:call-template name="scape-slash">
 390                                 <xsl:with-param name="string">
 391                                         <xsl:value-of select="substring-before($string,'://')"/>
 392                                         <xsl:value-of select="'://'"/>
 393                                         <xsl:call-template name="scape">
 394                                                 <xsl:with-param name="string" select="substring-after($string,'://')"/>
 395                                         </xsl:call-template>
 396                                 </xsl:with-param>
 397                         </xsl:call-template>
 398                 </xsl:when>
 399                 <xsl:otherwise>
 400                         <xsl:call-template name="scape-slash">
 401                                 <xsl:with-param name="string">
 402                                         <xsl:call-template name="scape">
 403                                                 <xsl:with-param name="string" select="$string"/>
 404                                         </xsl:call-template>
 405                                 </xsl:with-param>
 406                         </xsl:call-template>
 407                 </xsl:otherwise>
 408         </xsl:choose>
 409         </xsl:template>
 410
 411         <doc:template name="normalize-scape" xmlns="">
 412                 <refpurpose>Character Escaping and Whitespace Normalization</refpurpose>
 413                 <doc:description>
 414                         <para>
 415
 416                                 This template is used by various templates to escape &latex;
 417                                 active characters and to normalise whitespace.
 418
 419                         </para>
 420                 </doc:description>
 421                 <doc:variables>
 422                         &no_var;
 423                 </doc:variables>
 424                 <doc:params>
 425                         <variablelist>
 426                                 <varlistentry>
 427                                         <term>string</term>
 428                                         <listitem><simpara>The text to be processed.</simpara></listitem>
 429                                 </varlistentry>
 430                         </variablelist>
 431                 </doc:params>
 432                 <doc:notes>
 433                         <para>
 434
 435                                 This template will call the <xref linkend="template.scape"/>
 436                                 template and process its output with the XPath
 437                                 <function condition="xpath">normalize-space</function>
 438                                 function.
 439
 440                         </para>
 441                 </doc:notes>
 442         </doc:template>
 443         <xsl:template name="normalize-scape">
 444                 <xsl:param name="string"/>
 445                 <xsl:variable name="result">
 446                         <xsl:call-template name="scape">
 447                                 <xsl:with-param name="string" select="$string"/>
 448                         </xsl:call-template>
 449                 </xsl:variable>
 450                 <xsl:value-of select="normalize-space($result)"/>
 451         </xsl:template>
 452
 453         <doc:template name="string-replace" xmlns="">
 454                 <refpurpose>Search-and-replace</refpurpose>
 455                 <doc:description>
 456                         <para>
 457
 458                                 This template performs search-and-replace to modify all
 459                                 instances of a substring.
 460
 461                         </para>
 462                 </doc:description>
 463                 <doc:variables>
 464                         &no_var;
 465                 </doc:variables>
 466                 <doc:params>
 467                         <variablelist>
 468                                 <varlistentry>
 469                                         <term>string</term>
 470                                         <listitem><simpara>The text to be searched.</simpara></listitem>
 471                                 </varlistentry>
 472                                 <varlistentry>
 473                                         <term>from</term>
 474                                         <listitem><simpara>The text (substring) to be replaced.</simpara></listitem>
 475                                 </varlistentry>
 476                                 <varlistentry>
 477                                         <term>to</term>
 478                                         <listitem><simpara>The text that replaces the <literal>from</literal> text.</simpara></listitem>
 479                                 </varlistentry>
 480                         </variablelist>
 481                 </doc:params>
 482                 <doc:notes>
 483                         <para>
 484
 485                                 This template will search within the <literal>string</literal>
 486                                 text for all occurrences of <literal>from</literal> and replace
 487                                 them with the <literal>to</literal> text.
 488
 489                         </para>
 490                 </doc:notes>
 491         </doc:template>
 492         <xsl:template name="string-replace">
 493                 <xsl:param name="string"/>
 494                 <xsl:param name="from"/>
 495                 <xsl:param name="to"/>
 496
 497                 <xsl:choose>
 498                         <xsl:when test="contains($string, $from)">
 499
 500                         <xsl:variable name="before" select="substring-before($string, $from)"/>
 501                         <xsl:variable name="after" select="substring-after($string, $from)"/>
 502                         <xsl:variable name="prefix" select="concat($before, $to)"/>
 503
 504                         <xsl:value-of select="$before"/>
 505                         <xsl:value-of select="$to"/>
 506                         <xsl:call-template name="string-replace">
 507                                 <xsl:with-param name="string" select="$after"/>
 508                                 <xsl:with-param name="from" select="$from"/>
 509                                 <xsl:with-param name="to" select="$to"/>
 510                         </xsl:call-template>
 511                         </xsl:when>
 512                         <xsl:otherwise>
 513                         <xsl:value-of select="$string"/>
 514                         </xsl:otherwise>
 515                 </xsl:choose>
 516         </xsl:template>
 517
 518     <!--
 519     (c) David Carlisle
 520     replace all occurences of the character(s) `from'
 521     by the string `to' in the string `string'.
 522     <xsl:template name="string-replace" >
 523         <xsl:param name="string"/>
 524         <xsl:param name="from"/>
 525         <xsl:param name="to"/>
 526         <xsl:choose>
 527             <xsl:when test="contains($string,$from)">
 528                 <xsl:value-of select="substring-before($string,$from)"/>
 529                 <xsl:value-of select="$to"/>
 530                 <xsl:call-template name="string-replace">
 531                     <xsl:with-param name="string" select="substring-after($string,$from)"/>
 532                     <xsl:with-param name="from" select="$from"/>
 533                     <xsl:with-param name="to" select="$to"/>
 534                 </xsl:call-template>
 535             </xsl:when>
 536             <xsl:otherwise>
 537                 <xsl:value-of select="$string"/>
 538             </xsl:otherwise>
 539         </xsl:choose>
 540     </xsl:template>
 541     -->
 542
 543         <xsl:template name="trim.verbatim">
 544                 <xsl:variable name="before" select="preceding-sibling::node()"/>
 545                 <xsl:variable name="after" select="following-sibling::node()"/>
 546
 547                 <xsl:variable name="conts" select="."/>
 548
 549                 <xsl:variable name="contsl">
 550                         <xsl:choose>
 551                                 <xsl:when test="count($before) = 0">
 552                                         <xsl:call-template name="remove-lf-left">
 553                                                 <xsl:with-param name="astr" select="$conts"/>
 554                                         </xsl:call-template>
 555                                 </xsl:when>
 556                                 <xsl:otherwise>
 557                                         <xsl:value-of select="$conts"/>
 558                                 </xsl:otherwise>
 559                         </xsl:choose>
 560                 </xsl:variable>
 561
 562                 <xsl:variable name="contslr">
 563                         <xsl:choose>
 564                                 <xsl:when test="count($after) = 0">
 565                                         <xsl:call-template name="remove-ws-right">
 566                                                 <xsl:with-param name="astr" select="$contsl"/>
 567                                         </xsl:call-template>
 568                                 </xsl:when>
 569                                 <xsl:otherwise>
 570                                         <xsl:value-of select="$contsl"/>
 571                                 </xsl:otherwise>
 572                         </xsl:choose>
 573                 </xsl:variable>
 574
 575                 <xsl:value-of select="$contslr"/>
 576         </xsl:template>
 577
 578         <xsl:template name="remove-lf-left">
 579                 <xsl:param name="astr"/>
 580                 <xsl:choose>
 581                         <xsl:when test="starts-with($astr,'&#xA;') or
 582                                         starts-with($astr,'&#xD;') or
 583                                         starts-with($astr,'&#x20;') or
 584                                         starts-with($astr,'&#x9;')">
 585                                 <xsl:call-template name="remove-lf-left">
 586                                         <xsl:with-param name="astr" select="substring($astr, 2)"/>
 587                                 </xsl:call-template>
 588                         </xsl:when>
 589                         <xsl:otherwise>
 590                                 <xsl:value-of select="$astr"/>
 591                         </xsl:otherwise>
 592                 </xsl:choose>
 593         </xsl:template>
 594
 595         <xsl:template name="remove-ws-right">
 596                 <xsl:param name="astr"/>
 597                 <xsl:variable name="last-char">
 598                         <xsl:value-of select="substring($astr, string-length($astr), 1)"/>
 599                 </xsl:variable>
 600                 <xsl:choose>
 601                         <xsl:when test="($last-char = '&#xA;') or
 602                                         ($last-char = '&#xD;') or
 603                                         ($last-char = '&#x20;') or
 604                                         ($last-char = '&#x9;')">
 605                                 <xsl:call-template name="remove-ws-right">
 606                                         <xsl:with-param name="astr" select="substring($astr, 1, string-length($astr) - 1)"/>
 607                                 </xsl:call-template>
 608                         </xsl:when>
 609                         <xsl:otherwise>
 610                                 <xsl:value-of select="$astr"/>
 611                         </xsl:otherwise>
 612                 </xsl:choose>
 613         </xsl:template>
 614
 615 </xsl:stylesheet>