diff options
Diffstat (limited to 'qls')
| -rw-r--r-- | qls/parser/lexer.py | 117 | ||||
| -rw-r--r-- | qls/parser/parser.py | 215 |
2 files changed, 332 insertions, 0 deletions
diff --git a/qls/parser/lexer.py b/qls/parser/lexer.py new file mode 100644 index 0000000..f7b8b98 --- /dev/null +++ b/qls/parser/lexer.py @@ -0,0 +1,117 @@ +from ply.lex import lex
+
+
+class QLSLexer:
+ def __init__(self):
+ self.__errors = []
+ self.__lexer = None
+
+ @property
+ def lexer(self):
+ return self.__lexer
+
+ @property
+ def errors(self):
+ return self.__errors
+
+ def build(self):
+ self.__lexer = lex(module=self)
+
+ def tokenize(self, data):
+ self.__errors = []
+ self.lexer.input(data)
+ token = self.lexer.token()
+ tokens = [token]
+
+ while token:
+ token = self.lexer.token()
+ tokens.append(token)
+
+ return tokens
+
+ tokens = [
+ 'COLON', 'COMMA',
+ 'LEFT_BRACE', 'RIGHT_BRACE',
+ 'LEFT_BRACKET', 'RIGHT_BRACKET',
+ 'IDENTIFIER',
+ 'HEX_COLOR',
+ 'INTEGER_LITERAL', 'STRING_LITERAL',
+ ]
+
+ # List of reserved keywords
+ reserved = {
+ 'stylesheet': 'STYLESHEET',
+ 'page': 'PAGE',
+ 'section': 'SECTION',
+ 'question': 'QUESTION',
+ 'default': 'DEFAULT',
+
+ # Properties
+ 'height': 'HEIGHT',
+ 'width': 'WIDTH',
+ 'font': 'FONT',
+ 'fontsize': 'FONT_SIZE',
+ 'color': 'COLOR',
+ 'widget': 'WIDGET',
+
+ # QL types
+ 'boolean': 'BOOLEAN',
+ 'date': 'DATE',
+ 'decimal': 'DECIMAL',
+ 'integer': 'INTEGER',
+ 'money': 'MONEY',
+ 'string': 'STRING',
+
+ # Widgets
+ 'calendar': 'CALENDAR',
+ 'checkbox': 'CHECKBOX',
+ 'line_edit': 'LINE_EDIT',
+ 'spinbox': 'SPINBOX',
+ 'radio': 'RADIO',
+ }
+
+ tokens += list(reserved.values())
+
+ # Regular expression rules for simple tokens
+ t_ignore = ' \t'
+
+ t_COLON = r':'
+ t_COMMA = r','
+
+ t_LEFT_BRACE = r'\{'
+ t_RIGHT_BRACE = r'\}'
+
+ t_LEFT_BRACKET = r'\('
+ t_RIGHT_BRACKET = r'\)'
+
+ t_HEX_COLOR = r'\#([A-Fa-f0-9]{6}|[A-Fa-f0-9]{3})'
+
+ @staticmethod
+ def t_newline(token):
+ r'\n+'
+ token.lexer.lineno += len(token.value)
+
+ @staticmethod
+ def t_eof(token):
+ token.lexer.lineno = 1
+
+ @staticmethod
+ def t_INTEGER_LITERAL(token):
+ r'\d+'
+ token.value = int(token.value)
+ return token
+
+ @staticmethod
+ def t_STRING_LITERAL(token):
+ r'\"(.+?)\"'
+ token.value = token.value[1:-1]
+ return token
+
+ def t_IDENTIFIER(self, token):
+ r'[a-zA-Z][a-zA-Z_0-9]*'
+ token.type = self.reserved.get(token.value, 'IDENTIFIER') # Check for reserved words
+ return token
+
+ def t_error(self, token):
+ self.errors.append("Illegal character '%s'" % token.value[0])
+ token.lexer.skip(1)
diff --git a/qls/parser/parser.py b/qls/parser/parser.py new file mode 100644 index 0000000..1637e6d --- /dev/null +++ b/qls/parser/parser.py @@ -0,0 +1,215 @@ +from ply.yacc import yacc + +from qls.parser.lexer import QLSLexer + + +class QLSParser: + def __init__(self): + self.__errors = [] + self.__tokens = QLSLexer.tokens + self.__parser = None + + @property + def errors(self): + return self.__errors + + @property + def tokens(self): + return self.__tokens + + @property + def parser(self): + return self.__parser + + def build(self): + self.__parser = yacc(module=self) + + def parse(self, data, lexer): + return self.parser.parse(data, lexer) + + @staticmethod + def p_stylesheet(production): + """stylesheet : STYLESHEET IDENTIFIER LEFT_BRACE pages RIGHT_BRACE""" + production[0] = ('STYLESHEET', production[2], production[4]) + + # Statements + @staticmethod + def p_pages(production): + """pages : page pages + | page""" + if len(production) == 3: + production[0] = [production[1]] + production[2] + elif len(production) == 2: + production[0] = [production[1]] + + @staticmethod + def p_page(production): + """page : PAGE IDENTIFIER LEFT_BRACE sections RIGHT_BRACE + | PAGE IDENTIFIER LEFT_BRACE sections default RIGHT_BRACE + | PAGE IDENTIFIER LEFT_BRACE default RIGHT_BRACE""" + if len(production) == 6: + production[0] = ('PAGE', production[2], production[4]) + elif len(production) == 7: + production[0] = ('PAGE', production[2], production[4], production[5]) + + @staticmethod + def p_sections(production): + """sections : section sections + | section""" + if len(production) == 3: + production[0] = [production[1]] + production[2] + elif len(production) == 2: + production[0] = [production[1]] + + @staticmethod + def p_statement(production): + """statement : section + | question""" + production[0] = production[1] + + @staticmethod + def p_statements(production): + """statements : statement statements + | statement""" + if len(production) == 3: + production[0] = [production[1]] + production[2] + elif len(production) == 2: + production[0] = [production[1]] + + @staticmethod + def p_section(production): + """section : SECTION STRING_LITERAL LEFT_BRACE statements RIGHT_BRACE + | SECTION STRING_LITERAL LEFT_BRACE statements default RIGHT_BRACE + | SECTION STRING_LITERAL question + | SECTION STRING_LITERAL default""" + if len(production) == 4: + production[0] = ('SECTION', production[2], [production[3]]) + elif len(production) == 6: + production[0] = ('SECTION', production[2], production[4]) + elif len(production) == 7: + production[0] = ('SECTION', production[2], production[4], production[5]) + + @staticmethod + def p_question(production): + """question : QUESTION IDENTIFIER""" + production[0] = ('QUESTION', production[2]) + + @staticmethod + def p_question_properties(production): + """question : QUESTION IDENTIFIER WIDGET widget""" + production[0] = ('QUESTION', production[2], production[4]) + + @staticmethod + def p_default(production): + """default : DEFAULT type LEFT_BRACE properties RIGHT_BRACE""" + production[0] = ('DEFAULT', production[2], production[4]) + + @staticmethod + def p_default_widget(production): + """default : DEFAULT type WIDGET widget""" + production[0] = ('DEFAULT', production[2], production[3]) + + # Properties + @staticmethod + def p_properties(production): + """properties : property properties + | property""" + if len(production) == 3: + production[0] = [production[1]] + production[2] + elif len(production) == 2: + production[0] = [production[1]] + + @staticmethod + def p_height(production): + """property : HEIGHT COLON INTEGER_LITERAL""" + production[0] = ('HEIGHT', production[3]) + + @staticmethod + def p_width(production): + """property : WIDTH COLON INTEGER_LITERAL""" + production[0] = ('WIDTH', production[3]) + + @staticmethod + def p_font(production): + """property : FONT COLON STRING_LITERAL""" + production[0] = ('FONT', production[3]) + + @staticmethod + def p_font_size(production): + """property : FONT_SIZE COLON INTEGER_LITERAL""" + production[0] = ('FONT_SIZE', production[3]) + + @staticmethod + def p_color(production): + """property : COLOR COLON HEX_COLOR""" + production[0] = ('COLOR', production[3]) + + @staticmethod + def p_widget(production): + """property : WIDGET widget""" + production[0] = ('WIDGET', production[2]) + + # Widgets + @staticmethod + def p_calendar(production): + """widget : CALENDAR""" + production[0] = 'CALENDAR' + + @staticmethod + def p_checkbox(production): + """widget : CHECKBOX""" + production[0] = 'CHECKBOX' + + @staticmethod + def p_line_edit(production): + """widget : LINE_EDIT""" + production[0] = 'LINE_EDIT' + + @staticmethod + def p_spinbox(production): + """widget : SPINBOX""" + production[0] = 'SPINBOX' + + @staticmethod + def p_radio_default(production): + """widget : RADIO""" + production[0] = 'RADIO' + + @staticmethod + def p_radio(production): + """widget : RADIO LEFT_BRACKET STRING_LITERAL COMMA STRING_LITERAL RIGHT_BRACKET""" + production[0] = ('RADIO', production[3], production[5]) + + # Types + @staticmethod + def p_boolean(production): + """type : BOOLEAN""" + production[0] = 'BOOLEAN' + + @staticmethod + def p_decimal(production): + """type : DECIMAL""" + production[0] = 'DECIMAL' + + @staticmethod + def p_string(production): + """type : STRING""" + production[0] = 'STRING' + + @staticmethod + def p_date(production): + """type : DATE""" + production[0] = 'DATE' + + @staticmethod + def p_money(production): + """type : MONEY""" + production[0] = 'MONEY' + + @staticmethod + def p_integer(production): + """type : INTEGER""" + production[0] = 'INTEGER' + + def p_error(self, production): + self.errors.append('Syntax error at line {}, token={}'.format(production.lineno, production.type)) |