@Override
public void onWaveletAdded(ObservableWavelet wavelet) {
String id = ModernIdSerialiser.INSTANCE.serialiseWaveletId(wavelet.getId());
if (channels.containsKey(id)) {
connect(id);
} else {
// This will trigger the onOperationChannelCreated callback below.
mux.createOperationChannel(wavelet.getId(), wavelet.getCreatorId());
}
}
@Override
public void onOperationChannelCreated(
OperationChannel channel, ObservableWaveletData snapshot, Accessibility accessibility) {
WaveletId wid = snapshot.getWaveletId();
String id = ModernIdSerialiser.INSTANCE.serialiseWaveletId(wid);
Preconditions.checkState(!channels.containsKey(id));
channels.put(id, channel);
if (wave.getWavelet(wid) != null) {
connect(id);
} else {
// This will trigger the onWaveletAdded callback above.
wave.addWavelet(operationalizer.operationalize(snapshot));
}
}
public void computeKeySignalType(
Result result,
String typeName,
int keyCode,
int which,
String keyIdentifier,
boolean metaKey,
boolean ctrlKey,
boolean altKey,
boolean shiftKey) {
boolean ret = true;
int typeInt;
if ("keydown".equals(typeName)) {
typeInt = Event.ONKEYDOWN;
} else if ("keypress".equals(typeName)) {
typeInt = Event.ONKEYPRESS;
} else if ("keyup".equals(typeName)) {
result.type = null;
return;
} else {
throw new AssertionError("Non-key-event passed to computeKeySignalType");
}
KeySignalType type;
int computedKeyCode = which != 0 ? which : keyCode;
if (computedKeyCode == 10) {
computedKeyCode = KeyCodes.KEY_ENTER;
}
// For non-firefox browsers, we only get keydown events for IME, no keypress
boolean isIME = computedKeyCode == IME_CODE;
boolean commandKey = commandIsCtrl ? ctrlKey : metaKey;
// Some trace logging very useful to debug
EditorStaticDeps.logger
.trace()
.log(
"KEY SIGNAL IN PROCESS identifier = "
+ keyIdentifier
+ " code = "
+ computedKeyCode
+ " type = "
+ (typeInt == Event.ONKEYDOWN ? "KeyDown" : "KeyPress")
+ (ctrlKey ? " CTRL" : "")
+ (shiftKey ? " SHIFT" : "")
+ (altKey ? " ALT" : ""));
switch (userAgent) {
case WEBKIT:
// This is a bit tricky because there are significant differences
// between safari 3.0 and safari 3.1...
// We could probably actually almost use the same code that we use for IE
// for safari 3.1, because with 3.1 the webkit folks made a big shift to
// get the events to be in line with IE for compatibility. 3.0 events
// are a lot more similar to FF, but different enough to need special
// handling. However, it seems that using more advanced features like
// keyIdentifier for safaris is probably better and more future-proof,
// as well as being compatible between the two, so for now we're not
// using IE logic for safari 3.1
// Weird special large keycode numbers for safari 3.0, where it gives
// us keypress events (though they happen after the dom is changed,
// for some things like delete. So not too useful). The number
// 63200 is known as the cutoff mark.
if (typeInt == Event.ONKEYDOWN && computedKeyCode > 63200) {
result.type = null;
return;
} else if (typeInt == Event.ONKEYPRESS) {
// Skip keypress for tab and escape, because they are the only non-input keys
// that don't have keycodes above 63200. This is to prevent them from being treated
// as INPUT in the || = keypress below. See (X) below
if (computedKeyCode == KeyCodes.KEY_ESCAPE || computedKeyCode == KeyCodes.KEY_TAB) {
result.type = null;
return;
}
}
// boolean isPossiblyCtrlInput = typeInt == Event.ONKEYDOWN && ret.getCtrlKey();
boolean isActuallyCtrlInput = false;
boolean startsWithUPlus = keyIdentifier != null && keyIdentifier.startsWith("U+");
// Need to use identifier for the delete key because the keycode conflicts
// with the keycode for the full stop.
if (isIME) {
// If is IME, override the logic below - we get keyIdentifiers for IME events,
// but those are basically useless as the event is basically still an IME input
// event (e.g. keyIdentifier might say "Up", but it's certainly not navigation,
// it's just the user selecting from the IME dialog).
type = KeySignalType.INPUT;
} else if ((DELETE_KEY_IDENTIFIER.equals(keyIdentifier) && typeInt == Event.ONKEYDOWN)
|| computedKeyCode == KeyCodes.KEY_BACKSPACE) {
// WAVE-407 Avoid missing the '.' char (KEYPRESS + CODE 46)
// ensuring it's a KEYDOWN event with a DELETE_KEY_IDENTIFIER
type = KeySignalType.DELETE;
} else if (NAVIGATION_KEY_IDENTIFIERS.containsKey(keyIdentifier)
&& typeInt == Event.ONKEYDOWN) {
// WAVE-407 Avoid missing chars with NAVIGATION_KEY_IDENTIFIERS but
// represeting a SHIFT + key char (! " · ...). Navigation events come
// with KEYDOWN, not with KEYPRESS
type = KeySignalType.NAVIGATION;
// Escape, backspace and context-menu-key (U+0010) are, to my knowledge,
// the only non-navigation keys that
// have a "U+..." keyIdentifier, so we handle them explicitly.
// (Backspace was handled earlier).
} else if (computedKeyCode == KeyCodes.KEY_ESCAPE || "U+0010".equals(keyIdentifier)) {
type = KeySignalType.NOEFFECT;
} else if (computedKeyCode < 63200
&& // if it's not a safari 3.0 non-input key (See (X) above)
(typeInt == Event.ONKEYPRESS
|| // if it's a regular keypress
startsWithUPlus
|| computedKeyCode == KeyCodes.KEY_ENTER)) {
type = KeySignalType.INPUT;
isActuallyCtrlInput = ctrlKey || (commandComboDoesntGiveKeypress && commandKey);
} else {
type = KeySignalType.NOEFFECT;
}
// Maybe nullify it with the same logic as IE, EXCEPT for the special
// Ctrl Input webkit behaviour, and IME for windows
if (isActuallyCtrlInput) {
if (computedKeyCode == KeyCodes.KEY_ENTER) {
ret = typeInt == Event.ONKEYDOWN;
}
// HACK(danilatos): Don't actually nullify isActuallyCtrlInput for key press.
// We get that for AltGr combos on non-mac computers.
} else if (isIME || keyCode == KeyCodes.KEY_TAB) {
ret = typeInt == Event.ONKEYDOWN;
} else {
ret = maybeNullWebkitIE(ret, typeInt, type);
}
if (!ret) {
result.type = null;
return;
}
break;
case GECKO:
boolean hasKeyCodeButNotWhich = keyCode != 0 && which == 0;
// Firefox is easy for deciding signal events, because it issues a keypress for
// whenever we would want a signal. So we can basically ignore all keydown events.
// It also, on all OSes, does any default action AFTER the keypress (even for
// things like Ctrl/Meta+C, etc). So keypress is perfect for us.
// Ctrl+Space is an exception, where we don't get a keypress
// Firefox also gives us keypress events even for Windows IME input
if (ctrlKey && !altKey && !shiftKey && computedKeyCode == ' ') {
if (typeInt != Event.ONKEYDOWN) {
result.type = null;
return;
}
} else if (typeInt == Event.ONKEYDOWN) {
result.type = null;
return;
}
// Backspace fails the !hasKeyCodeButNotWhich test, so check it explicitly first
if (computedKeyCode == KeyCodes.KEY_BACKSPACE) {
type = KeySignalType.DELETE;
// This 'keyCode' but not 'which' works very nicely for catching normal typing input keys,
// the only 'exceptions' I've seen so far are bksp & enter which have both
} else if (!hasKeyCodeButNotWhich
|| computedKeyCode == KeyCodes.KEY_ENTER
|| computedKeyCode == KeyCodes.KEY_TAB) {
type = KeySignalType.INPUT;
} else if (computedKeyCode == KeyCodes.KEY_DELETE) {
type = KeySignalType.DELETE;
} else if (NAVIGATION_KEYS.contains(computedKeyCode)) {
type = KeySignalType.NAVIGATION;
} else {
type = KeySignalType.NOEFFECT;
}
break;
case IE:
// Unfortunately IE gives us the least information, so there are no nifty tricks.
// So we pretty much need to use some educated guessing based on key codes.
// Experimentation page to the rescue.
boolean isKeydownForInputKey = isInputKeyCodeIE(computedKeyCode);
// IE has some strange behaviour with modifiers and whether or not there will
// be a keypress. Ctrl kills the keypress, unless shift is also held.
// Meta doesn't kill it. Alt always kills the keypress, overriding other rules.
boolean hasModifiersThatResultInNoKeyPress = altKey || (ctrlKey && !shiftKey);
if (typeInt == Event.ONKEYDOWN) {
if (isKeydownForInputKey) {
type = KeySignalType.INPUT;
} else if (computedKeyCode == KeyCodes.KEY_BACKSPACE
|| computedKeyCode == KeyCodes.KEY_DELETE) {
type = KeySignalType.DELETE;
} else if (NAVIGATION_KEYS.contains(computedKeyCode)) {
type = KeySignalType.NAVIGATION;
} else {
type = KeySignalType.NOEFFECT;
}
} else {
// Escape is the only non-input thing that has a keypress event
if (computedKeyCode == KeyCodes.KEY_ESCAPE) {
result.type = null;
return;
}
assert typeInt == Event.ONKEYPRESS;
// I think the guessCommandFromModifiers() check here isn't needed,
// but i feel safer putting it in.
type = KeySignalType.INPUT;
}
if (hasModifiersThatResultInNoKeyPress || isIME || computedKeyCode == KeyCodes.KEY_TAB) {
ret = typeInt == Event.ONKEYDOWN ? ret : false;
} else {
ret = maybeNullWebkitIE(ret, typeInt, type);
}
if (!ret) {
result.type = null;
return;
}
break;
default:
throw new UnsupportedOperationException("Unhandled user agent");
}
if (ret) {
result.type = type;
result.keyCode = computedKeyCode;
} else {
result.type = null;
return;
}
}
public void deregisterChannel(String objectId) {
Preconditions.checkState(
channels.containsKey(objectId), "Channel handler not registered for %s", objectId);
channels.remove(objectId);
}
public void registerChannel(String objectId, GaeChannel channel) {
Preconditions.checkState(
!channels.containsKey(objectId), "Channel handler already registered for " + objectId);
channels.put(objectId, channel);
}