This file is indexed.

/usr/share/gtksourceview-3.0/language-specs/markdown.lang is in libgtksourceview-3.0-common 3.10.2-0ubuntu1.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
<?xml version="1.0" encoding="UTF-8"?>
<!--

 Author: Jean-Philippe Fleury
 Copyright (C) 2011 Jean-Philippe Fleury <contact@jpfleury.net>

 GtkSourceView is free software; you can redistribute it and/or
 modify it under the terms of the GNU Lesser General Public
 License as published by the Free Software Foundation; either
 version 2.1 of the License, or (at your option) any later version.

 GtkSourceView 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
 Lesser General Public License for more details.

 You should have received a copy of the GNU Lesser General Public
 License along with this library; if not, write to the Free Software
 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA

-->
<!-- Note: this language definition file adds support for Markdown syntax,
     described in the following websites:
     * (fr) <http://michelf.com/projets/php-markdown/syntaxe/>
     * (en) <http://daringfireball.net/projects/markdown/syntax> -->
<language id="markdown" _name="Markdown" version="2.0" _section="Markup">
  <metadata>
    <property name="mimetypes">text/x-markdown</property>
    <property name="globs">*.markdown;*.md;*.mkd</property>
    <property name="block-comment-start">&lt;!--</property>
    <property name="block-comment-end">--&gt;</property>
  </metadata>

  <styles>
    <style id="header" _name="Header" map-to="def:type"/>
    <style id="horizontal-rule" _name="Horizontal Rule" map-to="def:type"/>
    <style id="list-marker" _name="List Marker" map-to="def:statement"/>
    <style id="code" _name="Code" map-to="def:identifier"/>
    <style id="blockquote-marker" _name="Blockquote Marker" map-to="def:shebang"/>
    <style id="url" _name="URL" map-to="def:underlined"/>
    <style id="link-text" _name="Link Text" map-to="def:comment"/>
    <style id="label" _name="Label" map-to="def:preprocessor"/>
    <style id="attribute-value" _name="Attribute Value" map-to="def:constant"/>
    <style id="image-marker" _name="Image Marker" map-to="def:shebang"/>
    <style id="emphasis" _name="Emphasis" map-to="def:doc-comment-element"/>
    <style id="strong-emphasis" _name="Strong Emphasis" map-to="def:statement"/>
    <style id="backslash-escape" _name="Backslash Escape" map-to="def:special-char"/>
    <style id="line-break" _name="Line Break" map-to="def:note"/>
  </styles>

  <definitions>
    <!-- Examples:
         # Header 1 #
         ## Header 2
         ###Header 3###
    -->
    <context id="atx-header" style-ref="header">
      <match>^#+.+</match>
    </context>

    <!-- Examples:
         Header 1
         ========
         Header 2
         -
    -->
    <!-- Note: line break can't be used in regex, so only underline is matched. -->
    <context id="setext-header" style-ref="header">
      <match>^(-+|=+)[ \t]*$</match>
    </context>

    <!-- Examples:
         - - -
         **  **  **  **  **
         _____
    -->
    <context id="horizontal-rule" style-ref="horizontal-rule">
      <match extended="true">
        ^[ ]{0,3}            # Maximum 3 spaces at the beginning of the line.
        (
          (-[ ]{0,2}){3,} | # 3 or more hyphens, with 2 spaces maximum between each hyphen.
          (_[ ]{0,2}){3,} | # Idem, but with underscores.
          (\*[ ]{0,2}){3,}  # Idem, but with asterisks.
        )
        [ \t]*$              # Optional trailing spaces or tabs.
      </match>
    </context>

    <!-- Note about following list and code block contexts: according to the
         Markdown syntax, to write several paragraphs in a list item, we have
         to indent each paragraph. Example:

         - Item A (paragraph 1).

             Item A (paragraph 2).

             Item A (paragraph 3).

         - Item B.

         So there is a conflict in terms of syntax highlighting between an
         indented paragraph inside a list item (4 spaces or 1 tab) and an
         indented line of code outside a list (also 4 spaces or 1 tab). In this
         language file, since a full context analysis can't be done (because
         line break can't be used in regex), the choice was made ​​to highlight
         code block only from 2 levels of indentation. -->

    <!-- Example (unordered list):
         * Item
         + Item
         - Item

         Example (ordered list):
         1. Item
         2. Item
         3. Item
    -->
    <context id="list" style-ref="list-marker">
      <match extended="true">
        ^[ ]{0,3}  # Maximum 3 spaces at the beginning of the line.
        (
          \*|\+|-| # Asterisk, plus or hyphen for unordered list.
          [0-9]+\. # Number followed by period for ordered list.
        )
        [ \t]+     # Must be followed by at least 1 space or 1 tab.
      </match>
    </context>

    <!-- Example:
                 <em>HTML code</em> displayed <strong>literally</strong>.
    -->
    <context id="code-block" class="no-spell-check">
      <match>^( {8,}|\t{2,})([^ \t]+.*)</match>

      <include>
        <context sub-pattern="2" style-ref="code"/>
      </include>
    </context>

    <!-- Note about following code span contexts: within a paragraph, text
         wrapped with backticks indicates a code span. Markdown allows to use
         one or more backticks to wrap text, provided that the number is identical
         on both sides, and the same number of consecutive backticks is not
         present within the text. The current language file supports code span
         highlighting with up to 2 backticks surrounding text. -->

    <!-- Examples:
         Here's a literal HTML tag: `<p>`.
         `Here's a code span containing ``backticks``.`
    -->
    <context id="1-backtick-code-span" class="no-spell-check" style-ref="code">
      <match>(?&lt;!`)`[^`]+(`{2,}[^`]+)*`(?!`)</match>
    </context>

    <!-- Examples:
         Here's a literal HTML tag: ``<p>``.
         ``The grave accent (`) is used in Markdown to indicate a code span.``
         ``Here's another code span containing ```backticks```.``
    -->
    <context id="2-backticks-code-span" class="no-spell-check" style-ref="code">
      <match>(?&lt;!`)``[^`]+((`|`{3,})[^`]+)*``(?!`)</match>
    </context>

    <!-- Example:
         > Quoted text.
         > Quoted text with `code span`.
         >> Blockquote **nested**.
    -->
    <!-- Note: blockquote can contain block-level and inline Markdown elements,
         but the current language file only highlights inline ones (emphasis,
         link, etc.). -->
    <context id="blockquote" end-at-line-end="true">
      <start>^( {0,3}&gt;(?=.)( {0,4}&gt;)*)</start>

      <include>
        <context sub-pattern="1" where="start" style-ref="blockquote-marker"/>
        <context ref="1-backtick-code-span"/>
        <context ref="2-backticks-code-span"/>
        <context ref="automatic-link"/>
        <context ref="inline-link"/>
        <context ref="reference-link"/>
        <context ref="inline-image"/>
        <context ref="reference-image"/>
        <context ref="underscores-emphasis"/>
        <context ref="asterisks-emphasis"/>
        <context ref="underscores-strong-emphasis"/>
        <context ref="asterisks-strong-emphasis"/>
        <context ref="backslash-escape"/>
        <context ref="line-break"/>
      </include>
    </context>

    <!-- Examples:
         <user@example.com>
         <http://www.example.com/>
    -->
    <!-- Note: regular expressions are based from function `_DoAutoLinks` from
         Markdown.pl (see <http://daringfireball.net/projects/markdown/>). -->
    <context id="automatic-link" class="no-spell-check">
      <match case-sensitive="false" extended="true">
        &lt;
          (((mailto:)?[a-z0-9.-]+\@[-a-z0-9]+(\.[-a-z0-9]+)*\.[a-z]+) | # E-mail.
          ((https?|ftp):[^'">\s]+))                                     # URL.
        &gt;
      </match>

      <include>
        <context sub-pattern="1" style-ref="url"/>
      </include>
    </context>

    <!-- Examples:
         [link text](http://www.example.com/)
         [link text](<http://www.example.com/>)
         [link text]( /folder/page.html "Title" )
    -->
    <context id="inline-link">
      <match extended="true">
        \[(.*?)\]          # Link text.
        \(                 # Literal opening parenthesis.
          [ \t]*           # Optional spaces or tabs after the opening parenthesis.
          (&lt;(.*?)&gt; | # URL with brackets.
          (.*?))           # URL without brackets.
          ([ \t]+(".*?"))? # Optional title.
          [ \t]*           # Optional spaces or tabs before the closing parenthesis.
        \)                 # Literal closing parenthesis.
      </match>

      <include>
        <context sub-pattern="1" style-ref="link-text"/>
        <context sub-pattern="3" class="no-spell-check" style-ref="url"/>
        <context sub-pattern="4" class="no-spell-check" style-ref="url"/>
        <context sub-pattern="6" style-ref="attribute-value"/>
      </include>
    </context>

    <!-- Examples:
         [link text]
         [link text][]
         [link text][link label]
         [link text] [link label]
    -->
    <!-- Note: some assertions are used to differentiate reference link from
         link label. -->
    <context id="reference-link">
      <match>(?&lt;!^ |^  |^   )\[(.*?)\]([ \t]?\[(.*?)\])?(?!:)</match>

      <include>
        <context sub-pattern="1" style-ref="link-text"/>
        <context sub-pattern="3" class="no-spell-check" style-ref="label"/>
      </include>
    </context>

    <!-- Examples:
         [link label]: /folder/page.html
         [link label]: <http://www.example.com/>
         [link label]: http://www.example.com/ "Title"
    -->
    <context id="link-definition">
      <match extended="true">
        ^[ ]{0,3}             # Maximum 3 spaces at the beginning of the line.
        \[(.+?)\]:            # Link label and colon.
        [ \t]*                # Optional spaces or tabs.
        (&lt;([^ \t]+?)&gt; | # URL with brackets.
        ([^ \t]+?))           # URL without brackets.
        ([ \t]+(".*?"))?      # Optional title.
        [ \t]*$               # Optional trailing spaces or tabs.
      </match>

      <include>
        <context sub-pattern="1" class="no-spell-check" style-ref="label"/>
        <context sub-pattern="3" class="no-spell-check" style-ref="url"/>
        <context sub-pattern="4" class="no-spell-check" style-ref="url"/>
        <context sub-pattern="6" style-ref="attribute-value"/>
      </include>
    </context>

    <!-- Examples:
         ![alt text](http://www.example.com/image.jpg)
         ![alt text]( <http://www.example.com/image.jpg> )
         ![alt text] (/path/to/image.jpg "Title")
    -->
    <context id="inline-image">
      <match extended="true">
        (!)                     # Leading ! sign.
        \[(.*?)\][ ]?           # Alternate text for the image (and optional space).
        \(                      # Literal parenthesis.
          [ \t]*                # Optional spaces or tabs after the opening parenthesis.
          (&lt;([^ \t]*?)&gt; | # Image path or URL with brackets.
          ([^ \t]*?))           # Image path or URL without brackets.
          ([ \t]+(".*?"))?      # Optional title.
          [ \t]*                # Optional spaces or tabs before the closing parenthesis.
        \)                      # Literal parenthesis.
      </match>

      <include>
        <context sub-pattern="1" style-ref="image-marker"/>
        <context sub-pattern="2" style-ref="attribute-value"/>
        <context sub-pattern="4" class="no-spell-check" style-ref="url"/>
        <context sub-pattern="5" class="no-spell-check" style-ref="url"/>
        <context sub-pattern="6" style-ref="attribute-value"/>
      </include>
    </context>

    <!-- Examples:
         ![alt text][image label]
         ![alt text] [image label]
    -->
    <context id="reference-image">
      <match>(!)\[(.*?)\] ?\[(.*?)\]</match>

      <include>
        <context sub-pattern="1" style-ref="image-marker"/>
        <context sub-pattern="2" style-ref="attribute-value"/>
        <context sub-pattern="3" class="no-spell-check" style-ref="label"/>
      </include>
    </context>

    <!-- Examples:
         Lorem _ipsum dolor_ sit amet.
         Here's an _emphasized text containing an underscore (\_)_.
    -->
    <context id="underscores-emphasis" style-ref="emphasis">
      <match>(?&lt;!_)_[^_ \t].*?(?&lt;!\\|_| |\t)_(?!_)</match>
    </context>

    <!-- Examples:
         Lorem *ipsum dolor* sit amet.
         Here's an *emphasized text containing an asterisk (\*)*.
    -->
    <context id="asterisks-emphasis" style-ref="emphasis">
      <match>(?&lt;!\*)\*[^\* \t].*?(?&lt;!\\|\*| |\t)\*(?!\*)</match>
    </context>

    <!-- Examples:
         Lorem __ipsum dolor__ sit amet.
         Here's a __strongly emphasized text containing an underscore (\_)__.
    -->
    <context id="underscores-strong-emphasis" style-ref="strong-emphasis">
      <match>__[^_ \t].*?(?&lt;!\\|_| |\t)__</match>
    </context>

    <!-- Examples:
         Lorem **ipsum dolor** sit amet.
         Here's a **strongly emphasized text containing an asterisk (\*).**
    -->
    <context id="asterisks-strong-emphasis" style-ref="strong-emphasis">
      <match>\*\*[^\* \t].*?(?&lt;!\\|\*| |\t)\*\*</match>
    </context>

    <context id="backslash-escape" style-ref="backslash-escape">
      <match>\\[\\`*_{}\[\]()#+-.!]</match>
    </context>

    <!-- Note: a manual line break should be followed by a line containing text,
         but since line break can't be used in regex, only trailing spaces or tabs
         are matched. -->
    <context id="line-break">
      <match>(?&lt;=[^ \t])([ \t]{2,})$</match>

      <include>
        <context sub-pattern="1" style-ref="line-break"/>
      </include>
    </context>

    <context id="markdown-syntax">
      <include>
        <context ref="atx-header"/>
        <context ref="setext-header"/>
        <context ref="horizontal-rule"/>
        <context ref="list"/>
        <context ref="code-block"/>
        <context ref="1-backtick-code-span"/>
        <context ref="2-backticks-code-span"/>
        <context ref="blockquote"/>
        <context ref="automatic-link"/>
        <context ref="inline-link"/>
        <context ref="reference-link"/>
        <context ref="link-definition"/>
        <context ref="inline-image"/>
        <context ref="reference-image"/>
        <context ref="underscores-emphasis"/>
        <context ref="asterisks-emphasis"/>
        <context ref="underscores-strong-emphasis"/>
        <context ref="asterisks-strong-emphasis"/>
        <context ref="backslash-escape"/>
        <context ref="line-break"/>
      </include>
    </context>

    <replace id="html:embedded-lang-hook" ref="markdown-syntax"/>

    <context id="markdown">
      <include>
        <context ref="markdown-syntax"/>
        <!-- Note: even if it's highlighted, Markdown syntax within HTML blocks
             (e.g., `<div>`) is not processed. -->
        <context ref="html:html"/>
      </include>
    </context>
  </definitions>
</language>