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input.js
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input.js
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(function($){
function InputManager() {
this.characterReader = document.createElement('input');
$(this.characterReader).attr('type', 'text');
$(this.characterReader).css({
position : 'absolute',
left : '-300px',
top : '-300px'
});
this.bindings = {};
}
var EMPTY = 0;
var KBD_SHIFT = 1;
var KBD_CONTROL = 2;
var KBD_ALT = 4;
var SPECIAL_KEY_STRINGS = {
8 : '<BACKSPACE>',
9 : '<TAB>',
13 : '<ENTER>',
27 : '<ESC>',
32 : '<SPACE>',
37 : '<LEFT>',
38 : '<UP>',
39 : '<RIGHT>',
40 : '<DOWN>',
46 : '<DELETE>'
};
for (var i=1; i<124; i++) {
SPECIAL_KEY_STRINGS[111 + i] = '<F' + i + '>';
}
function keyStringFromCommand(command) {
var keys = command.split('-');
var modifiers = EMPTY;
while (keys.length > 1) {
var mod = keys.shift();
if (mod == 'S') {
modifiers = modifiers | KBD_SHIFT;
}
if (mod == 'C') {
modifiers = modifiers | KBD_CONTROL;
}
if (mod == 'A') {
modifiers = modifiers | KBD_ALT;
}
}
// There's probably a better way to do this
var keyString = keys[0];
if (typeof SPECIAL_KEY_STRINGS[keyString] === "undefined" &&
keyString.indexOf('\\') != 0) {
keyString = keyString.toUpperCase();
}
return keyString + modifiers;
}
InputManager.prototype = {
bindKey : function(command, f) {
var keyString = keyStringFromCommand(command);
this.bindings[keyString] = f;
},
unbindKey : function(command) {
var keyString = keyStringFromCommand(command);
delete this.bindings[keyString];
},
bindKeys : function(bindings) {
var self = this;
$.each(bindings, function(key, binding){
self.bindKey(key, binding);
});
},
unbindKeys : function(commands) {
var self = this;
$.each(commands, function(_index, command) {
self.unbindKey(command);
});
},
handler : function(editor) {
var bindings = this.bindings;
var characterReader = this.characterReader;
return function(e) {
var keyString;
if (typeof SPECIAL_KEY_STRINGS[e.which] !== 'undefined') {
keyString = SPECIAL_KEY_STRINGS[e.which];
} else {
keyString = String.fromCharCode(e.which);
}
var modifiers = EMPTY;
if (e.shiftKey) {
modifiers = modifiers | KBD_SHIFT;
}
if (e.ctrlKey) {
modifiers = modifiers | KBD_CONTROL;
}
if (e.altKey) {
modifiers = modifiers | KBD_ALT;
}
if (typeof bindings[keyString + modifiers] !== "undefined") {
e.preventDefault();
e.stopPropagation();
return bindings[keyString + modifiers](editor, e);
} else if (typeof bindings["\\" + e.which + modifiers] !== "undefined") {
e.preventDefault();
e.stopPropagation();
return bindings["\\" + e.which + modifiers](editor, e);
} else {
setTimeout(function(){
var s = $(characterReader).val();
if (s.length == 1) {
editor.insertChar(s);
} else if (s.length > 1) {
editor.insertString(s);
}
$(characterReader).val('');
}, 5);
e.stopPropagation();
return true;
}
};
},
focus : function() {
$(this.characterReader).focus();
},
keydown : function(f) {
$(this.characterReader).keydown(f);
}
};
$.fn.s2e.config.InputManager = InputManager;
})(jQuery);