oxjs/source/Ox.UI/js/Core/Keyboard.js

108 lines
3.4 KiB
JavaScript

'use strict';
/*@
Ox.Keyboard <o> Basic keyboard handler
@*/
Ox.Keyboard = (function() {
var buffer = '', bound = [], resetTimeout, triggerTimeout;
Ox.UI.ready(function() {
Ox.$document.keydown(keydown)
});
function keydown(event) {
var focused = Ox.Focus.focused(),
key,
keyName = Ox.KEYS[event.keyCode] || '',
keyNames = keyName ? [keyName] : [],
keyBasename = keyName.split('.')[0],
ret = true;
Ox.forEach(Ox.MODIFIER_KEYS, function(v, k) {
// avoid pushing modifier twice
// using event.originalEvent since jquery always sets
// event.metaKey to event.ctrlKey
if (event.originalEvent[k] && keyBasename != v) {
keyNames.splice(-1, 0, v);
}
});
key = keyNames.join('_');
if (focused === null || !Ox.UI.elements[focused].hasClass('OxInput')) {
bound.forEach(function(id) {
Ox.UI.elements[id].triggerEvent('key_' + key);
});
}
if (focused !== null && bound.indexOf(focused) == -1) {
Ox.UI.elements[focused].triggerEvent('key_' + key);
// prevent Chrome from scrolling, or going back in history
if (
[
'backspace', 'down', 'left', 'right', 'space', 'up'
].indexOf(key) > -1
&& !Ox.UI.elements[focused].hasClass('OxInput')
&& !Ox.UI.elements[focused].hasClass('OxAutocompleteMenu')
) {
ret = false;
}
// prevent cursor in input field from moving to start or end
if (
['down', 'up'].indexOf(key) > -1
&& Ox.UI.elements[focused].hasClass('OxAutocompleteMenu')
) {
ret = false;
}
}
if (/^[\w\d](\.numpad)?$|^space$/.test(key)) {
// don't register leading spaces or trailing double spaces
if (!(keyName == 'space' && (buffer == '' || / $/.test(buffer)))) {
buffer += keyName == 'space' ? ' ' : keyBasename;
// clear the trigger timeout only if the key went into the buffer
clearTimeout(triggerTimeout);
triggerTimeout = setTimeout(function() {
focused !== null && Ox.UI.elements[focused].triggerEvent('keys', {
keys: buffer
});
}, 25);
// fixme: used to be 250, but seemed too much.
// if it stays at 25, we may not need a timeout at all
}
}
// clear the reset timeout even if the key didn't go into the buffer
clearTimeout(resetTimeout);
resetTimeout = setTimeout(function() {
buffer = '';
}, 1000);
//Firefox will cancel active XMLHttpRequests otherwise
if (keyName == 'escape') {
event.preventDefault();
}
return ret;
}
return {
/*@
bind <f> bind
(id) -> <u> bind id
@*/
bind: function(id) {
var index = bound.indexOf(id);
index == -1 && bound.push(id);
},
/*@
unbind <f> unbind
(id) -> <u> unbind id
@*/
unbind: function(id) {
var index = bound.indexOf(id);
index > -1 && bound.splice(index, 1);
}
};
}());