diff hgext/highlight/highlight.py @ 6938:ce94b3236ea4

highlight: split code to improve startup times

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/hgext/highlight/highlight.py	Mon Aug 25 23:04:56 2008 +0200
@@ -0,0 +1,54 @@
+# highlight extension implementation file
+#
+# The original module was split in an interface and an implementation
+# file to defer pygments loading and speedup extension setup.
+
+from mercurial import demandimport
+demandimport.ignore.extend(['pkgutil', 'pkg_resources', '__main__',])
+
+from mercurial import util
+from mercurial.templatefilters import filters
+
+from pygments import highlight
+from pygments.util import ClassNotFound
+from pygments.lexers import guess_lexer, guess_lexer_for_filename, TextLexer
+from pygments.formatters import HtmlFormatter
+
+SYNTAX_CSS = ('\n<link rel="stylesheet" href="{url}highlightcss" '
+              'type="text/css" />')
+
+def pygmentize(field, fctx, style, tmpl):
+
+    # append a <link ...> to the syntax highlighting css
+    old_header = ''.join(tmpl('header'))
+    if SYNTAX_CSS not in old_header:
+        new_header =  old_header + SYNTAX_CSS
+        tmpl.cache['header'] = new_header
+
+    text = fctx.data()
+    if util.binary(text):
+        return
+
+    # To get multi-line strings right, we can't format line-by-line
+    try:
+        lexer = guess_lexer_for_filename(fctx.path(), text[:1024],
+                                         encoding=util._encoding)
+    except (ClassNotFound, ValueError):
+        try:
+            lexer = guess_lexer(text[:1024], encoding=util._encoding)
+        except (ClassNotFound, ValueError):
+            lexer = TextLexer(encoding=util._encoding)
+
+    formatter = HtmlFormatter(style=style, encoding=util._encoding)
+
+    colorized = highlight(text, lexer, formatter)
+    # strip wrapping div
+    colorized = colorized[:colorized.find('\n</pre>')]
+    colorized = colorized[colorized.find('<pre>')+5:]
+    coloriter = iter(colorized.splitlines())
+
+    filters['colorize'] = lambda x: coloriter.next()
+
+    oldl = tmpl.cache[field]
+    newl = oldl.replace('line|escape', 'line|colorize')
+    tmpl.cache[field] = newl