From 5742a7850bc59d4e9e5a47a06c90b2321c389c63 Mon Sep 17 00:00:00 2001
From: gbrandl <devnull@localhost>
Date: Wed, 14 Feb 2007 20:16:23 +0100
Subject: [svn] Add a first version of the Moin parser.

---
 TODO                    |  16 ++------
 external/moin-parser.py | 102 ++++++++++++++++++++++++++++++++++++++++++++++++
 tests/test_cmdline.py   |  10 ++++-
 3 files changed, 114 insertions(+), 14 deletions(-)
 create mode 100644 external/moin-parser.py

diff --git a/TODO b/TODO
index 496e7f48..c1d6396a 100644
--- a/TODO
+++ b/TODO
@@ -1,16 +1,8 @@
 Todo
 ====
 
-for 0.7
--------
-
-- a MoinMoin parser
-
-- more unit tests (test pygmentize, test all formatters comprehensively)
-
-
-new lexers
-----------
+suggested new lexers
+--------------------
 
 * Haskell
 * Lisp
@@ -33,8 +25,8 @@ for 0.8 -- 1.0
     backtrack to death...
   * add support for function name highlighting to C++ lexer
 
-- add folding? would require more language-aware parsers...
-
 - allow "overlay" token types to highlight specials: nth line, a word etc.
 
 - pygmentize option presets, more sophisticated method to output styles?
+
+- add folding? would require more language-aware parsers...
diff --git a/external/moin-parser.py b/external/moin-parser.py
new file mode 100644
index 00000000..5d00be83
--- /dev/null
+++ b/external/moin-parser.py
@@ -0,0 +1,102 @@
+# -*- coding: utf-8 -*-
+"""
+    The Pygments MoinMoin Parser
+    ~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+
+    This is a MoinMoin parser plugin that renders source code
+    to HTML via Pygments.
+
+    To use it, put it in the data/plugin/parser subdirectory of
+    your Moin instance, and give it the name that the parser directive
+    should have. For example, if you name the file ``code.py``, you
+    can get a highlighted Python code sample with this Wiki markup::
+
+        {{{
+        #!code python
+        [...]
+        }}}
+
+    Additionally, if you set ATTACHMENTS below to True, Pygments will
+    also be called for all attachments for whose filenames there is no other
+    parser registered.
+
+    You are responsible for including CSS rules that will map the Pygments
+    CSS classes to colors. You can output a stylesheet file with `pygmentize`,
+    put it into the `htdocs` directory of your Moin instance and then include
+    it in the `stylesheets` configuration option in the Moin config, e.g.::
+
+        stylesheets = [('screen', '/htdocs/pygments.css')]
+
+    If you do not want to do that and are willing to accept slightly larger
+    HTML output, you can set the INLINESTYLES option below to True.
+
+    :copyright: 2007 by Georg Brandl.
+    :license: BSD, see LICENSE for more details.
+"""
+
+# Options
+# ~~~~~~~
+
+# Set to True if you want to highlight attachments, in addition to
+# {{{ }}} blocks.
+ATTACHMENTS = True
+
+# Set to False if you don't want to have line numbers in the output. 
+LINENOS = True
+
+# Set to True if you want inline CSS styles instead of classes
+INLINESTYLES = False
+
+
+import sys
+
+from pygments import highlight
+from pygments.util import ObjectNotFound
+from pygments.lexers import get_lexer_by_name, get_lexer_for_filename, TextLexer
+from pygments.formatters import HtmlFormatter
+
+formatter = HtmlFormatter(linenos=LINENOS, noclasses=INLINESTYLES)
+textlexer = TextLexer()
+
+
+class Parser:
+    """
+    MoinMoin Pygments parser.
+    """
+    if ATTACHMENTS:
+        extensions = '*'
+    else:
+        extensions = []
+        
+    Dependencies = []
+
+    def __init__(self, raw, request, **kw):
+        self.raw = raw
+        self.req = request
+        if "format_args" in kw:
+            # called from a {{{ }}} block
+            try:
+                self.lexer = get_lexer_by_name(kw['format_args'].strip())
+            except ObjectNotFound:
+                self.lexer = textlexer
+            return
+        if "filename" in kw:
+            # called for an attachment
+            filename = kw['filename']
+        else:
+            # called for an attachment by an older moin
+            # HACK: find out the filename by peeking into the execution
+            #       frame which might not always work
+            try:
+                frame = sys._getframe(1)
+                filename = frame.f_locals['filename']
+            except:
+                filename = 'x.txt'
+        try:
+            self.lexer = get_lexer_for_filename(filename)
+        except ObjectNotFound:
+            self.lexer = textlexer
+
+    def format(self, formatter):
+        self.req.write(
+            formatter.rawHTML(highlight(self.raw, self.lexer, formatter)))
diff --git a/tests/test_cmdline.py b/tests/test_cmdline.py
index 89048db9..d38628e2 100644
--- a/tests/test_cmdline.py
+++ b/tests/test_cmdline.py
@@ -44,7 +44,7 @@ class CmdLineTest(unittest.TestCase):
 
     def test_O_opt(self):
         filename = os.path.join(testdir, testfile)
-        c, o, e = run_cmdline("-Ofull=1,linenos=true", "-fhtml", filename)
+        c, o, e = run_cmdline("-Ofull=1,linenos=true,foo=bar", "-fhtml", filename)
         self.assertEquals(c, 0)
         self.assert_("<html" in o)
         self.assert_('class="linenos"' in o)
@@ -56,9 +56,15 @@ class CmdLineTest(unittest.TestCase):
         self.assertEquals(c, 0)
         self.assert_('<span class="n-Blubb' in o)
 
+    def test_H_opt(self):
+        c, o, e = run_cmdline("-H", "formatter", "html")
+        self.assertEquals(c, 0)
+        self.assert_('HTML' in o)
+
     def test_invalid_opts(self):
         for opts in [("-L", "-lpy"), ("-L", "-fhtml"), ("-L", "-Ox"),
-                     ("-a",), ("-Sst", "-lpy")]:
+                     ("-a",), ("-Sst", "-lpy"), ("-H",),
+                     ("-H", "formatter"),]:
             self.assert_(run_cmdline(*opts)[0] == 2)
 
     def test_normal(self):
-- 
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