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Properly check for null.

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This commit is contained in:
Michael Jumper
2012-11-28 22:13:32 -08:00
parent d56756390d
commit d75ee89430
1 changed files with 20 additions and 8 deletions
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28
guacamole-common-js/src/main/resources/keyboard.js
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@@ -335,6 +335,9 @@ Guacamole.Keyboard = function(element) {
*/
function press_key(keysym) {
// Don't bother with pressing the key if the key is unknown
if (keysym == null) return;
// Only press if released
if (!guac_keyboard.pressed[keysym]) {
@@ -342,7 +345,7 @@ Guacamole.Keyboard = function(element) {
guac_keyboard.pressed[keysym] = true;
// Send key event
if (keysym != null && guac_keyboard.onkeydown) {
if (guac_keyboard.onkeydown) {
guac_keyboard.onkeydown(keysym);
// Stop any current repeat
@@ -458,8 +461,13 @@ Guacamole.Keyboard = function(element) {
// If we do not expect to handle via keypress, handle now
if (!expect_keypress) {
e.preventDefault();
keydownChar[keynum] = keysym;
press_key(keysym);
// Press key if known
if (keysym != null) {
keydownChar[keynum] = keysym;
press_key(keysym);
}
}
}, true);
@@ -485,9 +493,11 @@ Guacamole.Keyboard = function(element) {
release_key(0xFFE9);
}
// Send press + release
press_key(keysym);
release_key(keysym);
// Send press + release if keysym known
if (keysym != null) {
press_key(keysym);
release_key(keysym);
}
}, true);
@@ -508,8 +518,10 @@ Guacamole.Keyboard = function(element) {
else if (keynum == 17) guac_keyboard.modifiers.ctrl = false;
else if (keynum == 18) guac_keyboard.modifiers.alt = false;
// Send release event
release_key(keydownChar[keynum]);
// Send release event if original key known
var keydown_keysym = keydownChar[keynum];
if (keydown_keysym != null)
release_key(keydown_keysym);
// Clear character record
keydownChar[keynum] = null;