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keyeventR: A tweety keyevent-handler
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| function( | |
| a, // The event method (keydown, keyup or keypress) | |
| b, // The keycode | |
| c, // The callback | |
| d, // Placeholder (document) | |
| e, // Placeholder (event) | |
| f // Placeholder (on + event) | |
| ) { | |
| d = document; // Contains the document object | |
| f = d['on' + a]; // Contains the on-event handler | |
| d['on' + a] = function(e) { // Executes the function on event | |
| e = // Contains the returned keycode cross browser way | |
| e ? // If (e)vent is available... | |
| e.which // ...use `which` for ie... | |
| : // ...else... | |
| event.keyCode; // ...use `keyCode` for others | |
| if ( | |
| !!f // If event is not a function... | |
| || // ...OR... | |
| b === e // ...given keycode is equal to pressed key | |
| ) { | |
| c(e); // The callback function | |
| } | |
| }; | |
| } |
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| function(a,b,c,d,e,f) {d=document;f=d['on'+a];d['on'+a]=function(e){e=e?e.which:event.keyCode;if(!!f||b===e){c(e);}};} |
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| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| Version 2, December 2004 | |
| Copyright (C) 2012 Yannick Albert <http://yckart.com> | |
| Everyone is permitted to copy and distribute verbatim or modified | |
| copies of this license document, and changing it is allowed as long | |
| as the name is changed. | |
| DO WHAT THE FUCK YOU WANT TO PUBLIC LICENSE | |
| TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION | |
| 0. You just DO WHAT THE FUCK YOU WANT TO. |
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| { | |
| "name": "keyeventR", | |
| "description": "A tweety keyevent-handler.", | |
| "keywords": [ | |
| "shortcut", | |
| "keypress", | |
| "keydown", | |
| "keydup", | |
| "event-handler" | |
| ] | |
| } |
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| <!DOCTYPE html> | |
| <title>Foo</title> | |
| <div>Expected value: Press <b>left</b>, <b>right</b> or <b>space</b>.</div> | |
| <div>Actual value: <b id="ret"></b></div> | |
| <script> | |
| var key = function(a,b,c,d,e,f) {d=document;f=d['on'+a];d['on'+a]=function(e){e=e?e.which:event.keyCode;if(!!f||b===e){c(e);}};}; | |
| key('keypress', 32, function() { | |
| document.getElementById('ret').innerHTML = "Spacebar is pressed with onkeypress" | |
| }); | |
| key('keyup', 37, function() { | |
| document.getElementById('ret').innerHTML = "Left arrow is pressed with keyup" | |
| }); | |
| key('keydown', 39, function() { | |
| document.getElementById('ret').innerHTML = "Right arrow is pressed with keydown" | |
| }); | |
| </script> |
github comments are strange at the moment and seem no longer to be editable. Here's the code again (I forgot that you can omit the if, too):
function(a,b,c,d,e,f){d=document;f=d[a='on'+a];d[a]=function(e){e=e?e.which:event.keyCode;!!f||b===e&&c(e)}}
Oh, and you don't have to initialize e in the first function if you do it in the second one again:
function(a,b,c,d,f){d=document;f=d[a='on'+a];d[a]=function(e){e=e?e.which:event.keyCode;!!f||b===e&&c(e)}}
Pah! Shame on me :D I've to accept, it was late and I was tired! I'll update the repo soon...
BTW: Any ideas why my gists are not shared on 140byt.es?
Since we cannot test automatically if a gist is a valid entry, jed'll have to do that by hand, which may take some time.
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Keycode handling is the other way round than you commented: event.keyCode is for IE and e.which for the other browsers. Why do you trigger if the former event (f) is not a function - isn't that unneccessary? Even then, you can reuse a to prepend the "on":
function(a,b,c,d,e,f){d=document;f=d[a='on'+a];d[a]=function(e){e=e?e.which:event.keyCode;if(!!f||b===e){c(e);}};}