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|
#
# $Id$
#
# Commont parsing classes for symbols/inet
# The parsing is simplified, based on regex - it is NOT a real parser for very
# complex XKB format
#
class Symbols < Hash
#
# Constructor
#
def initialize
@includedSyms = Array.new
end
# Write-only property, parent list of symbols definitions
def symbols_list=(symbolsList)
@symbolsList = symbolsList
end
# Whether this set of symbols is hidden or not
def hidden?
@hidden
end
def hidden=(h)
@hidden = h
end
#
# Add "dependency" - the symbols referenced using the "include" statement.
#
def add_included(other)
@includedSyms.push(other)
end
alias get_original []
#
# Get the symbol, trying first own definitions, then walking through all
# dependenies
#
def [](symName)
own = self.get_original(symName)
if own.nil?
@includedSyms.find_all do | symsName |
syms = @symbolsList[symsName]
his = syms[symName]
if !his.nil?
own = his
break
end
end
end
own
end
#
# Create a hash including all elements of this hash which are not in the
# other hash, use symbols + and * for marking the elements which existed in
# the original hash (+ if not existed)
#
def -(other)
diff = self.class.new
self.find_all do | key, value |
existing = other[key]
if existing != value
diff[key] = [ value, existing.nil? ? '+' : '' ]
end
end
diff
end
def to_s
s = "{\n"
# First output included syms
@includedSyms.find_all do | symsName |
s += " include \"inet(#{symsName})\"\n"
end
# Then - own definitions
self.find_all do | key, value |
s += " key #{key} { [ #{value} ] };\n"
end
s + "}";
end
end
class SymbolsList < Hash
#
# Add new xkb_symbols
#
def add_symbols (symbolsName, hidden)
newSyms = Symbols.new
newSyms.symbols_list = self
newSyms.hidden = hidden
self[symbolsName] = newSyms
end
def to_s
s = "// Autogenerated\n\n"
self.find_all do | symbols, mapping |
s += "partial alphanumeric_keys\nxkb_symbols \"#{symbols}\" #{mapping};\n\n"
end
s
end
def match_symbols(new_symbols,limit)
matching = Hash.new
find_all do | symbols, mapping |
diff = new_symbols - mapping
if diff.size <= limit
matching[symbols] = diff
end
end
matching
end
end
class Parser
def parse (fileName)
allSyms = SymbolsList.new;
currentSyms = nil
hidden = false
File.open(fileName) do | file |
file.each_line do | line |
line.scan(/xkb_symbols\s+"(\w+)"/) do | symsName |
currentSyms = allSyms.add_symbols(symsName[0], hidden)
end
line.scan(/^\s*key\s*<(\w+)>\s*\{\s*\[\s*(\w+)/) do | keycode, keysym |
currentSyms[keycode] = keysym
end
line.scan(/^partial\s+(hidden\s+)?alphanumeric_keys/) do | h |
hidden = !h[0].nil?
end
line.scan(/^\s*include\s+"inet\((\w+)\)"/) do | otherPart |
currentSyms.add_included(otherPart[0])
end
end
end
allSyms
end
end
|
