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|
# hooks.rb -- hook-related functions
# Author: Michael Scholz <mi-scholz@users.sourceforge.net>
# Created: 03/12/21 13:48:01
# Changed: 15/02/27 23:12:08
# If class Hook isn't compiled in, here is the corresponding Ruby
# class and the initialization of all global hooks.
=begin
# example in extsnd.html, "Channel-specific hooks"
def protect(snd = false, chn = false)
edit_pos = edit_position(snd, chn)
hook = edit_hook(snd, chn)
hook.reset_hook!
hook.add_hook!("protect") do | |
snd_print("protected") if val = edit_position(snd, chn) < edit_pos
val
end
end
def unprotect(snd = false, chn = false)
edit_hook(snd, chn).reset_hook!
end
=end
# Snd_hooks an array containing all global hook variables
#
# $var_hook.member?("name of hook")
# $var_hook.show or
# describe_hook(hook) prints code of hook procedures if file exists
# $var.run_hook_by_name(name, *args)
#
# with_local_hook(hook, *procs, &thunk)
# reset_all_hooks() clears all hook procedures
require "clm"
unless defined?(Hook)
class Hook
include Enumerable
def initialize(name, arity = 0, help = "")
@name = name
@arity = arity
@procs = []
if string?(help) and (not help.empty?)
add_help(name, help)
end
end
attr_reader :name, :arity
def add_hook!(name, &body)
@procs.push([name, body])
end
def remove_hook!(name)
@procs.delete(@procs.assoc(name))
end
def reset_hook!
@procs.clear
end
def run_hook(&body)
self.to_a.each(&body)
end
alias each run_hook
def call(*args)
ret = nil
self.run_hook do |prc|
ret = prc.call(*args)
end
ret
end
def to_a
@procs.map do |ary|
ary.last
end
end
def length
@procs.length
end
alias size length
def empty?
@procs.empty?
end
def describe
get_help(@name)
end
alias documentation describe
def names
@procs.map do |ary|
ary.first
end
end
def inspect
format("#<%s name: %p, arity: %d, procs[%d]: %p>",
self.class, @name, @arity, self.length, self.names)
end
end
def make_hook(name, arity = 0, help = "", hook_name = nil, &body)
error_str = "make_hook(name, arity=0, help=\"\", hook_name=nil, &body): \
need a String or Symbol, not %p"
var_sym = case name
when Symbol
name
when String
name.intern
else
raise format(error_str, name)
end
if var_sym.to_s.split(//).first != "$"
var_sym = format("$%s", var_sym.to_s).intern
end
unless (var = Hook.instance_eval("#{var_sym} if defined?(#{var_sym})"))
var = Hook.new(var_sym.to_s, arity, help)
end
if block_given?
unless string?(hook_name)
hook_name = format("%s hook", var_sym.to_s)
end
var.add_hook!(hook_name, &body)
end
Hook.instance_eval("#{var_sym} = var")
end
def hook?(obj)
obj.kind_of?(Hook)
end
$after_apply_controls_hook = Hook.new("$after_apply_controls_hook", 1)
$after_graph_hook = Hook.new("$after_graph_hook", 2)
$after_lisp_graph_hook = Hook.new("$after_lisp_graph_hook", 2)
$after_open_hook = Hook.new("$after_open_hook", 1)
$after_save_as_hook = Hook.new("$after_save_as_hook", 3)
$after_save_state_hook = Hook.new("$after_save_state_hook", 1)
$after_transform_hook = Hook.new("$after_transform_hook", 3)
$bad_header_hook = Hook.new("$bad_header_hook", 1)
$before_close_hook = Hook.new("$before_close_hook", 1)
$before_exit_hook = Hook.new("$before_exit_hook", 0)
$before_save_as_hook = Hook.new("$before_save_as_hook", 7)
$before_save_state_hook = Hook.new("$before_save_state_hook", 1)
$before_transform_hook = Hook.new("$before_transform_hook", 2)
$clip_hook = Hook.new("$clip_hook", 1)
$close_hook = Hook.new("$close_hook", 1)
$dac_hook = Hook.new("$dac_hook", 1)
$draw_mark_hook = Hook.new("$draw_mark_hook", 1)
$draw_mix_hook = Hook.new("$draw_mix_hook", 5)
$drop_hook = Hook.new("$drop_hook", 1)
$during_open_hook = Hook.new("$during_open_hook", 3)
$effects_hook = Hook.new("$effects_hook", 0)
$enved_hook = Hook.new("$enved_hook", 5)
$exit_hook = Hook.new("$exit_hook", 0)
$graph_hook = Hook.new("$graph_hook", 4)
$help_hook = Hook.new("$help_hook", 2)
$initial_graph_hook = Hook.new("$initial_graph_hook", 3)
$key_press_hook = Hook.new("$key_press_hook", 4)
$lisp_graph_hook = Hook.new("$lisp_graph_hook", 2)
$listener_click_hook = Hook.new("$listener_click_hook", 1)
$mark_click_hook = Hook.new("$mark_click_hook", 1)
$mark_drag_hook = Hook.new("$mark_drag_hook", 1)
$mark_hook = Hook.new("$mark_hook", 4)
$mix_click_hook = Hook.new("$mix_click_hook", 1)
$mix_drag_hook = Hook.new("$mix_drag_hook", 3)
$mix_release_hook = Hook.new("$mix_release_hook", 2)
$mouse_click_hook = Hook.new("$mouse_click_hook", 7)
$mouse_drag_hook = Hook.new("$mouse_drag_hook", 6)
$mouse_enter_graph_hook = Hook.new("$mouse_enter_graph_hook", 2)
$mouse_enter_label_hook = Hook.new("$mouse_enter_label_hook", 3)
$mouse_enter_listener_hook = Hook.new("$mouse_enter_listener_hook", 1)
$mouse_enter_text_hook = Hook.new("$mouse_enter_text_hook", 1)
$mouse_leave_graph_hook = Hook.new("$mouse_leave_graph_hook", 2)
$mouse_leave_label_hook = Hook.new("$mouse_leave_label_hook", 3)
$mouse_leave_listener_hook = Hook.new("$mouse_leave_listener_hook", 1)
$mouse_leave_text_hook = Hook.new("$mouse_leave_text_hook", 1)
$mouse_press_hook = Hook.new("$mouse_press_hook", 6)
$mus_error_hook = Hook.new("$mus_error_hook", 2)
$name_click_hook = Hook.new("$name_click_hook", 1)
$new_sound_hook = Hook.new("$new_sound_hook", 1)
$new_widget_hook = Hook.new("$new_widget_hook", 1)
$open_hook = Hook.new("$open_hook", 1)
$open_raw_sound_hook = Hook.new("$open_raw_sound_hook", 2)
$orientation_hook = Hook.new("$orientation_hook", 0)
$output_comment_hook = Hook.new("$output_comment_hook", 1)
$play_hook = Hook.new("$play_hook", 1)
$read_hook = Hook.new("$read_hook", 1)
$save_hook = Hook.new("$save_hook", 2)
$save_state_hook = Hook.new("$save_state_hook", 1)
$select_channel_hook = Hook.new("$select_channel_hook", 2)
$select_sound_hook = Hook.new("$select_sound_hook", 1)
$snd_error_hook = Hook.new("$snd_error_hook", 1)
$snd_warning_hook = Hook.new("$snd_warning_hook", 1)
$start_playing_hook = Hook.new("$start_playing_hook", 1)
$start_playing_selection_hook = Hook.new("$start_playing_selection_hook", 0)
$stop_dac_hook = Hook.new("$stop_dac_hook", 0)
$stop_playing_hook = Hook.new("$stop_playing_hook", 1)
$stop_playing_selection_hook = Hook.new("$stop_playing_selection_hook", 0)
$update_hook = Hook.new("$update_hook", 1)
# unless --without-gui
$color_hook = Hook.new("$color_hook", 0)
end
class Hook
def to_names
@procs.map do |ary|
ary.first
end
end
def member?(name)
to_names.member?(name)
end
alias included? member?
# This works only with newer ruby versions (I assume >= 1.8.x).
# Proc#to_s must return #<Proc:0x80c96a0@xxx:x> not only
# #<Proc:0x80c96a0>!
def to_str
self.each do |prc|
# cover printf's %x
Snd.display(prc.to_str.gsub(/%/, "%%"))
end
nil
end
alias show to_str
def run_hook_by_name(name, *args)
if prc = @procs.assoc(name)
prc.last.call(*args)
end
end
end
def describe_hook(hook)
hook.show
end
add_help(:with_local_hook,
"with_local_hook(hook, *procs, &thunk) \
Evaluates THUNK with HOOK set to PROCS, \
then restores HOOK to its previous state.")
def with_local_hook(hook, *procs, &thunk)
old_procs = []
hook.to_names.each do |name|
old_procs.push(hook.remove_hook!(name))
end
hook.reset_hook!
procs.each do |prc|
hook.add_hook!(prc.object_id.to_s, &prc)
end
thunk.call
rescue Interrupt, ScriptError, StandardError
Snd.display(verbose_message_string(true, nil, get_func_name))
ensure
hook.reset_hook!
old_procs.each do |name, prc|
hook.add_hook!(name, &prc)
end
end
if defined? $after_graph_hook
Snd_hooks = [$after_apply_controls_hook,
$after_graph_hook,
$after_lisp_graph_hook,
$after_open_hook,
$after_save_as_hook,
$after_save_state_hook,
$after_transform_hook,
$bad_header_hook,
$before_close_hook,
$before_exit_hook,
$before_save_as_hook,
$before_save_state_hook,
$before_transform_hook,
$clip_hook,
$close_hook,
$draw_mark_hook,
$draw_mix_hook,
$drop_hook,
$during_open_hook,
$effects_hook,
$enved_hook,
$exit_hook,
$graph_hook,
$help_hook,
$initial_graph_hook,
$key_press_hook,
$lisp_graph_hook,
$listener_click_hook,
$mark_click_hook,
$mark_drag_hook,
$mark_hook,
$mix_click_hook,
$mix_drag_hook,
$mix_release_hook,
$mouse_click_hook,
$mouse_drag_hook,
$mouse_enter_graph_hook,
$mouse_enter_label_hook,
$mouse_enter_listener_hook,
$mouse_enter_text_hook,
$mouse_leave_graph_hook,
$mouse_leave_label_hook,
$mouse_leave_listener_hook,
$mouse_leave_text_hook,
$mouse_press_hook,
$mus_error_hook,
$name_click_hook,
$new_sound_hook,
$new_widget_hook,
$open_hook,
$open_raw_sound_hook,
$orientation_hook,
$output_comment_hook,
$play_hook,
$read_hook,
$save_hook,
$save_state_hook,
$select_channel_hook,
$select_sound_hook,
$snd_error_hook,
$snd_warning_hook,
$start_playing_hook,
$start_playing_selection_hook,
$stop_playing_hook,
$stop_playing_selection_hook,
$update_hook]
unless provided? :snd_nogui
Snd_hooks.push($color_hook)
end
def reset_all_hooks
Snd_hooks.each do |h|
h.kind_of?(Hook) and h.reset_hook!
end
Snd.sounds.each do |snd|
channels(snd).times do |chn|
(h = edit_hook(snd, chn)).kind_of?(Hook) and h.reset_hook!
(h = after_edit_hook(snd, chn)).kind_of?(Hook) and h.reset_hook!
(h = undo_hook(snd, chn)).kind_of?(Hook) and h.reset_hook!
end
end
end
end
# hooks.rb ends here
|