2 * (C) Copyright 2004-2007 Shawn Betts
3 * (C) Copyright 2007-2010 John J. Foerch
4 * (C) Copyright 2007-2008 Jeremy Maitin-Shepard
6 * Use, modification, and distribution are subject to the terms specified in the
12 /* Generate vk name table */
13 var keycode_to_vk_name = [];
14 var vk_name_to_keycode = {};
15 let (KeyEvent = Ci.nsIDOMKeyEvent,
17 for (var i in KeyEvent) {
18 /* Check if this is a key binding */
19 if (i.substr(0, prefix.length) == prefix) {
20 let name = i.substr(prefix.length).toLowerCase();
21 let code = KeyEvent[i];
22 keycode_to_vk_name[code] = name;
23 vk_name_to_keycode[name] = code;
33 function modifier (in_event_p, set_in_event) {
34 this.in_event_p = in_event_p;
35 this.set_in_event = set_in_event;
39 A: new modifier(function (event) { return event.altKey; },
40 function (event) { event.altKey = true; }),
41 C: new modifier(function (event) { return event.ctrlKey; },
42 function (event) { event.ctrlKey = true; }),
43 M: new modifier(function (event) { return event.metaKey; },
44 function (event) { event.metaKey = true; }),
45 S: new modifier(function (event) {
49 name = keycode_to_vk_name[event.keyCode];
50 return ((name && name.length > 1) ||
51 (event.charCode == 32) ||
52 (event.button != null));
56 function (event) { event.shiftKey = true; })
58 var modifier_order = ['C', 'M', 'S'];
60 // check the platform and guess whether we should treat Alt as Meta
61 if (get_os() == 'Darwin') {
62 // In OS X, alt is a shift-like modifier, in that we
63 // only care about it for non-character events.
64 modifiers.A = new modifier(
69 name = keycode_to_vk_name[event.keyCode];
70 return ((name && name.length > 1) ||
71 (event.charCode == 32) ||
72 (event.button != null));
76 function (event) { event.altKey = true; });
77 modifier_order = ['C', 'M', 'A', 'S'];
79 modifiers.M = modifiers.A;
88 function format_key_combo (event) {
90 for each (var M in modifier_order) {
91 if (modifiers[M].in_event_p(event) ||
92 (event.sticky_modifiers &&
93 event.sticky_modifiers.indexOf(M) != -1))
99 if (event.charCode == 32)
102 combo += String.fromCharCode(event.charCode);
103 } else if (event.keyCode) {
104 combo += keycode_to_vk_name[event.keyCode];
105 } else if (event.button != null) {
106 combo += "mouse" + (event.button + 1);
107 } else if (event.command) {
108 combo += "cmd" + event.command.toLowerCase();
113 function unformat_key_combo (combo) {
126 var len = combo.length - 2;
128 while (i < len && combo[i+1] == '-') {
130 modifiers[M].set_in_event(event);
133 var key = combo.substring(i);
135 event.charCode = key.charCodeAt(0);
136 else if (key == 'space')
138 else if (key.substring(0, 3) == 'cmd')
139 event.command = key.substr(3, 1).toUpperCase() +
141 else if (vk_name_to_keycode[key])
142 event.keyCode = vk_name_to_keycode[key];
143 else if (key.substring(0, 5) == 'mouse')
144 event.button = parseInt(key.substring(5));
154 define_keywords("$parent", "$help", "$name", "$anonymous",
155 "$display_name", "$notify");
158 this.parent = arguments.$parent;
160 this.predicate_bindings = [];
161 this.fallthrough = [];
162 this.help = arguments.$help;
163 this.name = arguments.$name;
164 this.display_name = arguments.$display_name;
165 this.notify = arguments.$notify;
166 this.anonymous = arguments.$anonymous;
169 function define_keymap (name) {
171 this[name] = new keymap($name = name, forward_keywords(arguments));
177 * Key Match Predicates.
180 function define_key_match_predicate (name, description, predicate) {
181 conkeror[name] = predicate;
182 conkeror[name].name = name;
183 conkeror[name].description = description;
184 return conkeror[name];
187 define_key_match_predicate('match_any_key', 'any key',
188 function (event) true);
190 // should be renamed to match_any_unmodified_character
191 define_key_match_predicate('match_any_unmodified_character', 'any unmodified character',
193 // this predicate can be used for both keypress and keydown
196 return ((event.type == 'keypress' && event.charCode)
197 || event.keyCode > 31)
198 && !modifiers.A.in_event_p(event)
201 && !event.sticky_modifiers;
202 } catch (e) { return false; }
205 define_key_match_predicate('match_checkbox_keys', 'checkbox keys',
207 return event.keyCode == 32
212 //XXX: keycode fallthroughs don't support sticky modifiers
215 define_key_match_predicate('match_text_keys', 'text editing keys',
217 return ((event.type == 'keypress' && event.charCode)
218 || event.keyCode == 13 || event.keyCode > 31)
221 && !modifiers.A.in_event_p(event);
222 //XXX: keycode fallthroughs don't support sticky modifiers
225 define_key_match_predicate('match_not_escape_key', 'any key but escape',
227 return event.keyCode != 27 ||
230 event.metaKey || // M-escape can also leave this mode, so we
231 // need to use an accurate determination of
232 // whether the "M" modifier was pressed,
233 // which is not necessarily the same as
242 function format_key_spec (key) {
243 if (key instanceof Function) {
245 return "<"+key.description+">";
247 return "<"+key.name+">";
248 return "<anonymous match function>";
253 function format_binding_sequence (seq) {
254 return seq.map(function (x) {
255 return format_key_spec(x.key);
260 function keymap_lookup (keymaps, combo, event) {
261 var i = keymaps.length - 1;
264 var kmap = keymaps[i];
267 var bindings = kmap.bindings;
268 var bind = bindings[combo];
272 new_kmaps.unshift(bind.keymap);
278 new_kmaps = [bind.keymap];
282 var pred_binds = kmap.predicate_bindings;
283 for (var j = 0, pblen = pred_binds.length; j < pblen; ++j) {
284 bind = pred_binds[j];
301 function keymap_lookup_fallthrough (keymap, event) {
302 var predicates = keymap.fallthrough;
303 for (var i = 0, plen = predicates.length; i < plen; ++i) {
304 if (predicates[i](event))
311 function for_each_key_binding (keymaps, callback) {
312 var binding_sequence = [];
314 function helper (keymap) {
315 if (in_keymaps.indexOf(keymap) >= 0)
317 in_keymaps.push(keymap);
319 for each (binding in keymap.bindings) {
320 binding_sequence.push(binding);
321 callback(binding_sequence);
323 helper(binding.keymap);
324 binding_sequence.pop();
326 for each (binding in keymap.predicate_bindings) {
327 binding_sequence.push(binding);
328 callback(binding_sequence);
330 helper(binding.keymap);
331 binding_sequence.pop();
335 //outer loop is to go down the parent-chain of keymaps
336 var i = keymaps.length - 1;
337 var keymap = keymaps[i];
341 keymap = keymap.parent;
343 keymap = keymaps[--i];
350 function keymap_lookup_command (keymaps, command) {
352 for_each_key_binding(keymaps, function (bind_seq) {
353 var bind = bind_seq[bind_seq.length - 1];
354 if (bind.command == command)
355 list.push(format_binding_sequence(bind_seq));
366 * $fallthrough, $repeat and $browser_object are as for define_key.
368 * ref is the source code reference of the call to define_key.
370 * kmap is the keymap in which the binding is to be defined.
372 * seq is the key sequence being bound. it may be necessary
373 * to auto-generate new keymaps to accomodate the key sequence.
375 * only one of new_command and new_keymap will be given.
376 * the one that is given is the thing being bound to.
378 define_keywords("$fallthrough", "$repeat", "$browser_object");
379 function define_key_internal (ref, kmap, seq, new_command, new_keymap) {
381 var args = arguments;
382 var last_in_sequence; // flag to indicate the final key combo in the sequence.
383 var key; // current key combo as we iterate through the sequence.
384 var undefine_key = (new_command == null) &&
385 (new_keymap == null) &&
386 (! args.$fallthrough);
388 /* Replace `bind' with the binding specified by (cmd, fallthrough) */
389 function replace_binding (bind) {
390 if (last_in_sequence) {
391 bind.command = new_command;
392 bind.keymap = new_keymap;
393 bind.fallthrough = args.$fallthrough;
394 bind.source_code_reference = ref;
395 bind.repeat = args.$repeat;
396 bind.browser_object = args.$browser_object;
399 throw new Error("Key sequence has a non-keymap in prefix");
404 function make_binding () {
405 if (last_in_sequence) {
407 fallthrough: args.$fallthrough,
408 command: new_command,
410 source_code_reference: ref,
411 repeat: args.$repeat,
412 browser_object: args.$browser_object,
416 kmap = new keymap($anonymous,
417 $name = old_kmap.name + " " + format_key_spec(key));
418 kmap.bound_in = old_kmap;
421 source_code_reference: ref,
422 bound_in: old_kmap };
427 for (var i = 0, slen = seq.length; i < slen; ++i) {
429 last_in_sequence = (i == slen - 1);
431 if (typeof key == "function") { // it's a match predicate
432 // Check if the binding is already present in the keymap
433 var pred_binds = kmap.predicate_bindings;
434 for (var j = 0, pblen = pred_binds.length; j < pblen; j++) {
435 if (pred_binds[j].key == key) {
436 if (last_in_sequence && undefine_key)
437 pred_binds.splice(j, 1);
439 replace_binding(pred_binds[j]);
444 pred_binds.push(make_binding());
446 // Check if the binding is already present in the keymap
447 var bindings = kmap.bindings;
448 var binding = bindings[key];
450 if (last_in_sequence && undefine_key)
451 delete bindings[key];
453 replace_binding(binding);
457 bindings[key] = make_binding();
463 * bind SEQ to a keymap or command CMD in keymap KMAP.
467 * $fallthrough: specifies that the keypress event will fall through
468 * to gecko. Note, by this method, only keypress will fall through.
469 * Keyup and keydown will still be blocked.
471 * $repeat: (command name) shortcut command to call if a prefix
472 * command key is pressed twice in a row.
474 * $browser_object: (browser object) Override the default
475 * browser-object for the command.
477 define_keywords("$fallthrough", "$repeat", "$browser_object");
478 function define_key (kmap, seq, cmd) {
482 var ref = get_caller_source_code_reference();
484 if (typeof seq == "string" && seq.length > 1)
485 seq = seq.split(" ");
487 if (!(typeof seq == "object") || !(seq instanceof Array))
490 // normalize the order of modifiers in key combos
493 if (typeof(k) == "string")
494 return format_key_combo(unformat_key_combo(k));
499 var new_command = null;
500 var new_keymap = null;
501 if (typeof cmd == "string" || typeof cmd == "function")
503 else if (cmd instanceof keymap)
505 else if (cmd != null)
506 throw new Error("Invalid `cmd' argument: " + cmd);
508 define_key_internal(ref, kmap, seq, new_command, new_keymap,
509 forward_keywords(arguments));
511 } catch (e if (typeof e == "string")) {
512 dumpln("Warning: Error occurred while binding sequence: " + orig_seq);
518 function undefine_key (kmap, seq) {
519 define_key(kmap, seq);
526 * Takes a keymap and a predicate on an event. Fallthroughs defined by
527 * these means will cause all three of keydown, keypress, and keyup to
528 * fall through to gecko, whereas those defined by the $fallthrough
529 * keyword to define_key only affect keypress events.
531 * The limitations of this method are that only the keyCode is available
532 * to the predicate, not the charCode, and keymap inheritance is not
533 * available for these "bindings".
535 function define_fallthrough (keymap, predicate) {
536 keymap.fallthrough.push(predicate);
541 * Minibuffer Read Key Binding
544 define_keymap("key_binding_reader_keymap");
545 define_key(key_binding_reader_keymap, match_any_key, "read-key-binding-key");
547 define_keywords("$keymap");
548 function key_binding_reader (minibuffer, continuation) {
549 keywords(arguments, $prompt = "Describe key:");
550 minibuffer_input_state.call(this, minibuffer, key_binding_reader_keymap, arguments.$prompt);
551 this.continuation = continuation;
552 if (arguments.$keymap)
553 this.target_keymap = arguments.$keymap;
555 this.target_keymap = get_current_keymaps(this.minibuffer.window).slice();
556 this.key_sequence = [];
558 key_binding_reader.prototype = {
559 constructor: key_binding_reader,
560 __proto__: minibuffer_input_state.prototype,
561 destroy: function () {
562 if (this.continuation)
563 this.continuation.throw(abort());
564 minibuffer_input_state.prototype.destroy.call(this);
568 function invalid_key_binding (seq) {
569 var e = new Error(seq.join(" ") + " is undefined");
570 e.key_sequence = seq;
571 e.__proto__ = invalid_key_binding.prototype;
574 invalid_key_binding.prototype = {
575 constructor: invalid_key_binding,
576 __proto__: interactive_error.prototype
579 function read_key_binding_key (window, state, event) {
580 var combo = format_key_combo(event);
581 var binding = keymap_lookup(state.target_keymap, combo, event);
583 state.key_sequence.push(combo);
585 if (binding == null) {
586 var c = state.continuation;
587 delete state.continuation;
588 window.minibuffer.pop_state();
589 c.throw(invalid_key_binding(state.key_sequence));
593 if (binding.constructor == Array) { //keymaps stack
594 window.minibuffer._restore_normal_state();
595 window.minibuffer._input_text = state.key_sequence.join(" ") + " ";
596 state.target_keymap = binding;
600 var c = state.continuation;
601 delete state.continuation;
603 window.minibuffer.pop_state();
606 c([state.key_sequence, binding]);
608 interactive("read-key-binding-key",
609 "Handle a keystroke in the key binding reader minibuffer state.",
611 read_key_binding_key(I.window,
612 I.minibuffer.check_state(key_binding_reader),
616 minibuffer.prototype.read_key_binding = function () {
618 var s = new key_binding_reader(this, (yield CONTINUATION), forward_keywords(arguments));
620 var result = yield SUSPEND;
621 yield co_return(result);