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#!/usr/bin/env python3
#
# Builds a tree view of a symbols file (showing all includes)
#
# This file is formatted with Python Black
import argparse
import pathlib
import os
from pyparsing import (
Word,
Literal,
LineEnd,
OneOrMore,
oneOf,
Or,
And,
QuotedString,
Regex,
cppStyleComment,
alphanums,
Optional,
ParseException,
)
xkb_basedir = None
class XkbSymbols:
def __init__(self, file, name):
self.file = file # Path to the file this section came from
self.layout = file.name # XKb - filename is the layout name
self.name = name
self.includes = []
def __str__(self):
return f"{self.layout}({self.name}): {self.includes}"
class XkbLoader:
"""
Wrapper class to avoid loading the same symbols file over and over
again.
"""
class XkbParserException(Exception):
pass
_instance = None
def __init__(self, xkb_basedir):
self.xkb_basedir = xkb_basedir
self.loaded = {}
@classmethod
def create(cls, xkb_basedir):
assert cls._instance is None
cls._instance = XkbLoader(xkb_basedir)
@classmethod
def instance(cls):
assert cls._instance is not None
return cls._instance
@classmethod
def load_symbols(cls, file):
return cls.instance().load_symbols_file(file)
def load_symbols_file(self, file):
file = self.xkb_basedir / file
try:
return self.loaded[file]
except KeyError:
pass
sections = []
def quoted(name):
return QuotedString(quoteChar='"', unquoteResults=True)
# Callback, toks[0] is "foo" for xkb_symbols "foo"
def new_symbols_section(name, loc, toks):
assert len(toks) == 1
sections.append(XkbSymbols(file, toks[0]))
# Callback, toks[0] is "foo(bar)" for include "foo(bar)"
def append_includes(name, loc, toks):
assert len(toks) == 1
sections[-1].includes.append(toks[0])
EOL = LineEnd().suppress()
SECTIONTYPE = (
"default",
"partial",
"hidden",
"alphanumeric_keys",
"modifier_keys",
"keypad_keys",
"function_keys",
"alternate_group",
)
NAME = quoted("name").setParseAction(new_symbols_section)
INCLUDE = (
lit("include") + quoted("include").setParseAction(append_includes) + EOL
)
# We only care about includes
OTHERLINE = And([~lit("};"), ~lit("include") + Regex(".*")]) + EOL
with open(file) as fd:
types = OneOrMore(oneOf(SECTIONTYPE)).suppress()
include_or_other = Or([INCLUDE, OTHERLINE.suppress()])
section = (
types
+ lit("xkb_symbols")
+ NAME
+ lit("{")
+ OneOrMore(include_or_other)
+ lit("};")
)
grammar = OneOrMore(section)
grammar.ignore(cppStyleComment)
try:
result = grammar.parseFile(fd)
except ParseException as e:
raise XkbLoader.XkbParserException(str(e))
self.loaded[file] = sections
return sections
def lit(string):
return Literal(string).suppress()
def print_section(s, filter_section=None, indent=0):
if filter_section and s.name != filter_section:
return
layout = Word(alphanums + "_/").setResultsName("layout")
variant = Optional(
lit("(") + Word(alphanums + "_").setResultsName("variant") + lit(")")
)
grammar = layout + variant
prefix = ""
if indent > 0:
prefix = " " * (indent - 2) + "|-> "
print(f"{prefix}{s.layout}({s.name})")
for include in s.includes:
result = grammar.parseString(include)
# Should really find the "default" section but for this script
# hardcoding "basic" is good enough
layout, variant = result.layout, result.variant or "basic"
# include "foo(bar)" means file "foo", section bar
includefile = xkb_basedir / layout
include_sections = XkbLoader.load_symbols(layout)
for include_section in include_sections:
print_section(include_section, filter_section=variant, indent=indent + 4)
def list_sections(sections, filter_section=None, indent=0):
for section in sections:
print_section(section, filter_section)
if __name__ == "__main__":
parser = argparse.ArgumentParser(description="XKB symbol tree viewer")
parser.add_argument(
"file",
metavar="file-or-directory",
type=pathlib.Path,
help="The XKB symbols file or directory",
)
parser.add_argument(
"section", type=str, default=None, nargs="?", help="The section (optional)"
)
ns = parser.parse_args()
if ns.file.is_dir():
xkb_basedir = ns.file.resolve()
files = sorted([f for f in ns.file.iterdir() if not f.is_dir()])
else:
# Note: this requires that the file given on the cmdline is not one of
# the sun_vdr/de or others inside a subdirectory. meh.
xkb_basedir = ns.file.parent.resolve()
files = [ns.file]
XkbLoader.create(xkb_basedir)
for file in files:
try:
sections = XkbLoader.load_symbols(file.resolve())
list_sections(sections, filter_section=ns.section)
except XkbLoader.XkbParserException:
pass
|
