Class: VER::Mode
- Inherits:
-
Object
- Object
- VER::Mode
- Defined in:
- lib/ver/mode.rb
Constant Summary collapse
- MERGER =
proc{|key, v1, v2| if v1.respond_to?(:merge) && v2.respond_to?(:merge) v1.merge(v2, &MERGER) else v2 end }
Instance Attribute Summary collapse
-
#arguments ⇒ Object
Returns the value of attribute arguments.
-
#callback ⇒ Object
Returns the value of attribute callback.
-
#name ⇒ Object
Returns the value of attribute name.
Class Method Summary collapse
Instance Method Summary collapse
- #ancestors(*done) {|_self| ... } ⇒ Object
- #attempt_execute(original_stack, lookup = false) ⇒ Object
- #bind(keychain, action_name = nil, &block) ⇒ Object
- #enter_key(key) ⇒ Object
- #enter_keys(*keys) ⇒ Object
- #enter_missing(key) ⇒ Object
- #execute(executable, *arg) ⇒ Object
- #find_ancestor(name) ⇒ Object
- #inherits(*others) ⇒ Object
-
#initialize(name, callback) ⇒ Mode
constructor
A new instance of Mode.
- #inspect ⇒ Object
- #map(sym, *keychains) ⇒ Object (also: #to)
- #missing(sym) ⇒ Object
- #register(key) ⇒ Object
Constructor Details
#initialize(name, callback) ⇒ Mode
Returns a new instance of Mode.
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# File 'lib/ver/mode.rb', line 17 def initialize(name, callback) @name, @callback = name, callback @stack = [] @map = {} @ancestors = [] @missing = nil @arguments = true end |
Instance Attribute Details
#arguments ⇒ Object
Returns the value of attribute arguments.
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# File 'lib/ver/mode.rb', line 11 def arguments @arguments end |
#callback ⇒ Object
Returns the value of attribute callback.
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# File 'lib/ver/mode.rb', line 11 def callback @callback end |
#name ⇒ Object
Returns the value of attribute name.
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# File 'lib/ver/mode.rb', line 11 def name @name end |
Class Method Details
.split_stack(stack) ⇒ Object
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# File 'lib/ver/mode.rb', line 190 def self.split_stack(stack) first = stack[0] return stack, nil if first == '0' || first == '<KeyPress-0>' pivot = stack.index{|c| c !~ /^(<KeyPress-\d+>|\d+)$/ } if pivot == 0 return stack, nil elsif pivot keys, args = stack[pivot..-1], stack[0..pivot] return keys, args.join.scan(/\d+/).join.to_i else return [], stack.join.to_i end end |
Instance Method Details
#ancestors(*done) {|_self| ... } ⇒ Object
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# File 'lib/ver/mode.rb', line 42 def ancestors(*done, &block) yield self @ancestors.each do |ancestor| next if done.include?(ancestor) yield ancestor ancestor.ancestors(done + [self], &block) end end |
#attempt_execute(original_stack, lookup = false) ⇒ Object
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# File 'lib/ver/mode.rb', line 123 def attempt_execute(original_stack, lookup = false) if arguments stack, arg = Mode.split_stack(original_stack) else stack, arg = original_stack, nil end if stack.empty? arg ? nil : false else executable = @map while key = stack.shift previous = executable executable = executable[key] case executable when nil # FIXME: this allows only one mode if found = previous.find{|prev_key, prev_value| prev_key.is_a?(Mode) } mode, action = found looked = mode.attempt_execute([key, *stack], true) case looked when false return false when nil return nil else cmd, cmd_arg = looked return nil if cmd.is_a?(Hash) return execute(action, cmd, arg) end else return false end end end if lookup return executable, arg else execute(executable, *arg) end end end |
#bind(keychain, action_name = nil, &block) ⇒ Object
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# File 'lib/ver/mode.rb', line 63 def bind(keychain, action_name = nil, &block) keychain = keychain.dup total = hash = {} while key = keychain.shift if key.is_a?(Symbol) canonical = callback.modes[key] else canonical = register(key) end if keychain.empty? hash[canonical] = block || action_name else hash = hash[canonical] = {} end end @map.replace @map.merge(total, &MERGER) end |
#enter_key(key) ⇒ Object
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# File 'lib/ver/mode.rb', line 92 def enter_key(key) @stack << key ancestors do |ancestor| result = ancestor.attempt_execute(@stack.dup) case result when nil # nothing matched yet, but possible in future return nil when false # nothing possible # try next one when true # executed @stack.clear return true else raise "%p is not a valid result" % [result] end end # no ancestors or all failed @stack.clear enter_missing(key) rescue => ex VER.error(ex) @stack.clear end |
#enter_keys(*keys) ⇒ Object
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# File 'lib/ver/mode.rb', line 88 def enter_keys(*keys) keys.flatten.each{|key| enter_key(key) } end |
#enter_missing(key) ⇒ Object
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# File 'lib/ver/mode.rb', line 119 def enter_missing(key) execute(@missing, key) if @missing end |
#execute(executable, *arg) ⇒ Object
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# File 'lib/ver/mode.rb', line 169 def execute(executable, *arg) arg = [*arg].compact # doesn't allow nil case executable when Hash return nil when Symbol callback.send(executable, *arg) when Array callback.send(*executable, *arg) when Proc executable.call(*arg) else return false end true rescue ArgumentError => ex callback.("#{executable} : #{ex}") true end |
#find_ancestor(name) ⇒ Object
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# File 'lib/ver/mode.rb', line 34 def find_ancestor(name) if found = callback.modes[name.to_sym] return found else raise "Mode #{name} is not specified yet" end end |
#inherits(*others) ⇒ Object
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# File 'lib/ver/mode.rb', line 26 def inherits(*others) others.flatten.each do |other| ancestor = find_ancestor(other.to_sym) @ancestors.delete ancestor @ancestors.unshift ancestor end end |
#inspect ⇒ Object
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# File 'lib/ver/mode.rb', line 13 def inspect "#<Mode #@name>" end |
#map(sym, *keychains) ⇒ Object Also known as: to
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# File 'lib/ver/mode.rb', line 56 def map(sym, *keychains) keychains.each do |keychain| bind(keychain.flatten, sym) end end |
#missing(sym) ⇒ Object
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# File 'lib/ver/mode.rb', line 52 def missing(sym) @missing = sym end |
#register(key) ⇒ Object
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# File 'lib/ver/mode.rb', line 84 def register(key) callback.register(key) end |