Implement urlencode filter

htmlcc/emitter/__init__.py

@@ -45,6 +45,11 @@ class Emitter:
 		
 		raise NotImplementedError()
 	
+	def output_variable_urlencoded(self, variable: str) -> None:
+		"""Emit code to output a variable, as encoded URL component"""
+		
+		raise NotImplementedError()
+	
 	def start_block(self, block_name: str) -> None:
 		"""Called at {% block ... %}"""
 		

htmlcc/emitter/cgit.py

@@ -35,6 +35,9 @@ class CgitEmitter(Emitter):
 	def output_variable_as_text(self, variable: str) -> None:
 		self.emit(f'html_txt({variable});')
 	
+	def output_variable_urlencoded(self, variable: str) -> None:
+		self.emit(f'html_url_arg({variable});')
+	
 	def start_page(self, page_name: str) -> None:
 		super().start_page(page_name)
 		self.emit('cgit_print_http_headers();')

htmlcc/parser.py

@@ -129,6 +129,10 @@ class Parser:
 			# Output as HTML attribute
 			variable = variable[:-len('attr')].rstrip()[:-1].rstrip()
 			self.emitter.output_variable_as_attr(variable)
+		elif variable.endswith('urlencode') and variable[:-len('urlencode')].rstrip().endswith('|'):
+			# Output as URL component
+			variable = variable[:-len('urlencode')].rstrip()[:-1].rstrip()
+			self.emitter.output_variable_urlencoded(variable)
 		else:
 			# No filter - output as text
 			self.emitter.output_variable_as_text(variable)