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<?xml version="1.0"?>
<!--

 Author: Jesse van den Kieboom <jesse@icecrew.nl>
 Copyright (C) 2007-2008 Jesse van den Kieboom <jesse@icecrew.nl>

 This library is free software; you can redistribute it and/or
 modify it under the terms of the GNU Library General Public
 License as published by the Free Software Foundation; either
 version 2 of the License, or (at your option) any later version.

 This library is distributed in the hope that it will be useful,
 but WITHOUT ANY WARRANTY; without even the implied warranty of
 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 Library General Public License for more details.

 You should have received a copy of the GNU Library General Public
 License along with this library; if not, see <http://www.gnu.org/licenses/>.

-->
<language id="snippets" name="Snippets" hidden="true" version="2.0">
  <styles>
    <style id="placeholder-bounds" name="Placeholder begin and end" map-to="def:function"/>
    <style id="default-value"      name="Default Value" map-to="def:string"/>
    <style id="single-placeholder" name="Single Placeholder" map-to="def:decimal"/>
    <style id="shell-placeholder"  name="Shell Placeholder" map-to="def:preprocessor"/>
    <style id="python-placeholder" name="Python Placeholder" map-to="def:preprocessor"/>
    <style id="regex-placeholder"  name="Regular Expression Placeholder" map-to="def:preprocessor"/>
    <style id="tabstop"            name="Tabstop"  map-to="def:decimal"/>
    <style id="placeholder-ref"    name="Placeholder Reference" map-to="def:decimal"/>
    <style id="placeholder-def"    name="Placeholder Default" map-to="def:string"/>
    <style id="escape"             name="Escape" map-to="def:special-char"/>
    <style id="environmental-var"  name="Environmental Variable" map-to="def:string"/>
    <style id="seperator"          name="Seperator" map-to="def:shebang"/>
    <style id="regex-pattern"      name="Regular Expression Pattern" map-to="def:string"/>
    <style id="replace-pattern"    name="Regular Expression Replace Pattern" map-to="def:string"/>
    <style id="modifier"           name="Modifier" map-to="def:keyword"/>
  </styles>

  <definitions>
    <define-regex id="number">[0-9]+</define-regex>
    <define-regex id="tabstop">\s*((\%{number})(:))</define-regex>
    <define-regex id="number-list" extended="true">\s*(\[(\%{number}(,\%{number})*)\](:))</define-regex>
    <define-regex id="environment">\$[A-Z_]+</define-regex>
    <define-regex id="regex-pattern">((?:\\[/]|\\}|[^/}])+)</define-regex>
  
    <context id="escape" style-ref="escape">
      <match>\\\$</match>
    </context>
    <context id="single-placeholder" style-ref="single-placeholder">
      <match>\$\%{number}|\${\%{number}}</match>
    </context>
    <context id="simple-placeholder-def" style-ref="default-value">
      <start>\${\%{tabstop}</start>
      <end>}</end>
      <include>
        <context sub-pattern="0" style-ref="placeholder-bounds" where="start"/>
        <context sub-pattern="0" style-ref="placeholder-bounds" where="end"/>
        <context sub-pattern="2" where="start" style-ref="tabstop"/>
        <context sub-pattern="3" where="start" style-ref="seperator"/>
        <context>
          <match>\\}</match>
        </context>
        <context ref="escape"/>
        <context ref="environmental-variable"/>
      </include>
    </context>
    <context id="simple-placeholder">
      <include>
        <context ref="single-placeholder"/>
        <context ref="simple-placeholder-def"/>
      </include>
    </context>
    <context id="shell-placeholder-contents">
      <include>
        <context ref="escape"/>
        <context ref="environmental-variable"/>
        <context ref="single-placeholder"/>
      </include>
    </context>
    <context id="shell-placeholder">
      <include>
        <context style-ref="shell-placeholder">
          <start>\$\(\%{tabstop}?</start>
          <end>\)</end>
          <include>
            <context sub-pattern="0" style-ref="placeholder-bounds" where="start"/>
            <context sub-pattern="0" style-ref="placeholder-bounds" where="end"/>
            <context sub-pattern="2" where="start" style-ref="tabstop"/>
            <context sub-pattern="3" where="start" style-ref="seperator"/>
            <context ref="shell-placeholder-contents"/>
            <context>
              <match>\\\)</match>
            </context>
          </include>
        </context>
        <context style-ref="shell-placeholder">
          <start>`\%{tabstop}?</start>
          <end>`</end>
            <include>
              <context sub-pattern="0" style-ref="placeholder-bounds" where="start"/>
              <context sub-pattern="0" style-ref="placeholder-bounds" where="end"/>
              <context sub-pattern="2" where="start" style-ref="tabstop"/>
              <context sub-pattern="3" where="start" style-ref="seperator"/>
              <context ref="shell-placeholder-contents"/>
              <context>
                <match>\\`</match>
              </context>
            </include>
        </context>      
      </include>
    </context>
    <context id="python-placeholder">
      <start>\$&lt;\%{tabstop}?\%{number-list}?</start>
      <end>&gt;</end>
      <include>
        <context sub-pattern="0" style-ref="placeholder-bounds" where="start"/>
        <context sub-pattern="0" style-ref="placeholder-bounds" where="end"/>
        <context sub-pattern="2" where="start" style-ref="tabstop"/>
        <context sub-pattern="3" where="start" style-ref="seperator"/>
        <context sub-pattern="5" where="start" style-ref="tabstop"/>
        <context sub-pattern="7" where="start" style-ref="seperator"/>
        <context>
          <match>\\&gt;</match>
        </context>
        <context ref="escape"/>
        <context ref="environmental-variable"/>
        <context ref="single-placeholder"/>
        <context ref="python:python"/>
      </include>    
    </context>
    <context id="regex-placeholder" style-ref="regex-placeholder">
      <match>(\${)\%{tabstop}?(?:\s*(?:(\%{number})|(\%{environment})))/\%{regex-pattern}/\%{regex-pattern}(?:[/]([a-zA-Z]*))?(})</match>
      <include>
        <context sub-pattern="1" style-ref="placeholder-bounds"/>
        <context sub-pattern="10" style-ref="placeholder-bounds"/>
        <context sub-pattern="3" style-ref="tabstop"/>
        <context sub-pattern="4" style-ref="seperator"/>
        <context sub-pattern="5" style-ref="tabstop"/>
        <context sub-pattern="6" style-ref="environmental-var"/>
        <context sub-pattern="7" style-ref="regex-pattern"/>
        <context sub-pattern="8" style-ref="replace-pattern"/>
        <context sub-pattern="9" style-ref="modifier"/>
      </include>
    </context>
    <context id="environmental-variable" style-ref="environmental-var">
      <match>\%{environment}</match>
    </context>
      <context id="snippets">
        <include>
          <context ref="escape"/>
          <context ref="regex-placeholder"/>
          <context ref="simple-placeholder"/>
          <context ref="shell-placeholder"/>
          <context ref="python-placeholder"/>
          <context ref="environmental-variable"/>
        </include>
    </context>
  </definitions>
</language>