Moved catalogue, chunks, compress, newtagging and pagination applications to apps...

[wolnelektury.git] / apps / compress / templatetags / compressed.py

diff --git a/apps/compress/templatetags/compressed.py b/apps/compress/templatetags/compressed.py
new file mode 100644 (file)
index 0000000..2a02009
--- /dev/null
+++ b/apps/compress/templatetags/compressed.py
@@ -0,0 +1,104 @@
+import os
+
+from django import template
+
+from django.conf import settings as django_settings
+
+from compress.conf import settings
+from compress.utils import media_root, media_url, needs_update, filter_css, filter_js, get_output_filename, get_version
+
+register = template.Library()
+
+def render_common(template_name, obj, filename, version):
+    if settings.COMPRESS:
+        filename = get_output_filename(filename, version)
+
+    context = obj.get('extra_context', {})
+    context['url'] = media_url(filename)
+
+    return template.loader.render_to_string(template_name, context)
+
+def render_css(css, filename, version=None):
+    return render_common(css.get('template_name', 'compress/css.html'), css, filename, version)
+
+def render_js(js, filename, version=None):
+    return render_common(js.get('template_name', 'compress/js.html'), js, filename, version)
+
+class CompressedCSSNode(template.Node):
+    def __init__(self, name):
+        self.name = name
+
+    def render(self, context):
+        css_name = template.Variable(self.name).resolve(context)
+
+        try:
+            css = settings.COMPRESS_CSS[css_name]
+        except KeyError:
+            return '' # fail silently, do not return anything if an invalid group is specified
+
+        if settings.COMPRESS:
+
+            version = None
+
+            if settings.COMPRESS_AUTO:
+                u, version = needs_update(css['output_filename'], css['source_filenames'])
+                if u:
+                    filter_css(css)
+
+            return render_css(css, css['output_filename'], version)
+        else:
+            # output source files
+            r = ''
+            for source_file in css['source_filenames']:
+                r += render_css(css, source_file)
+
+            return r
+
+class CompressedJSNode(template.Node):
+    def __init__(self, name):
+        self.name = name
+
+    def render(self, context):
+        js_name = template.Variable(self.name).resolve(context)
+
+        try:
+            js = settings.COMPRESS_JS[js_name]
+        except KeyError:
+            return '' # fail silently, do not return anything if an invalid group is specified
+
+        if settings.COMPRESS:
+
+            version = None
+
+            if settings.COMPRESS_AUTO:
+                u, version = needs_update(js['output_filename'], js['source_filenames'])
+                if u:
+                    filter_js(js)
+
+            return render_js(js, js['output_filename'], version)
+        else:
+            # output source files
+            r = ''
+            for source_file in js['source_filenames']:
+                r += render_js(js, source_file)
+            return r
+
+#@register.tag
+def compressed_css(parser, token):
+    try:
+        tag_name, name = token.split_contents()
+    except ValueError:
+        raise template.TemplateSyntaxError, '%r requires exactly one argument: the name of a group in the COMPRESS_CSS setting' % token.split_contents()[0]
+
+    return CompressedCSSNode(name)
+compressed_css = register.tag(compressed_css)
+
+#@register.tag
+def compressed_js(parser, token):
+    try:
+        tag_name, name = token.split_contents()
+    except ValueError:
+        raise template.TemplateSyntaxError, '%r requires exactly one argument: the name of a group in the COMPRESS_JS setting' % token.split_contents()[0]
+
+    return CompressedJSNode(name)
+compressed_js = register.tag(compressed_js)