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Magnifier: don't listen for focus/tracker events if the magnifier is not active

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In addition to checking the current settings, check also if the
zoom region is active before registering the event listener.
This way, we avoid DBus traffic for events we're not interested in.

Also, make FocusCaretTracker resilient to multiple register/deregister
calls (which can now happen).

https://bugzilla.gnome.org/show_bug.cgi?id=724305
This commit is contained in:
Giovanni Campagna 2014-02-13 16:25:24 +01:00
parent 6882273aa0
commit 3a92aa751f
2 changed files with 51 additions and 12 deletions
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30
js/ui/focusCaretTracker.js
View File

@ -34,7 +34,11 @@ const FocusCaretTracker = new Lang.Class({
_init: function() {
Atspi.init();
Atspi.set_timeout(250, 250);
this._atspiListener = Atspi.EventListener.new(Lang.bind(this, this._onChanged));
this._focusListenerRegistered = false;
this._caretListenerRegistered = false;
},
_onChanged: function(event) {
@ -45,21 +49,39 @@ const FocusCaretTracker = new Lang.Class({
},
registerFocusListener: function() {
return this._atspiListener.register(STATECHANGED + ':focused') &&
if (this._focusListenerRegistered)
return;
// Ignore the return value, we get an exception if they fail
// And they should never fail
this._atspiListener.register(STATECHANGED + ':focused');
this._atspiListener.register(STATECHANGED + ':selected');
this._focusListenerRegistered = true;
},
registerCaretListener: function() {
return this._atspiListener.register(CARETMOVED);
if (this._caretListenerRegistered)
return;
this._atspiListener.register(CARETMOVED);
this._caretListenerRegistered = true;
},
deregisterFocusListener: function() {
return this._atspiListener.deregister(STATECHANGED + ':focused') &&
if (!this._focusListenerRegistered)
return;
this._atspiListener.deregister(STATECHANGED + ':focused');
this._atspiListener.deregister(STATECHANGED + ':selected');
this._focusListenerRegistered = false;
},
deregisterCaretListener: function() {
return this._atspiListener.deregister(CARETMOVED);
if (!this._caretListenerRegistered)
return;
this._atspiListener.deregister(CARETMOVED);
this._caretListenerRegistered = false;
}
});
Signals.addSignalMethods(FocusCaretTracker.prototype);

29
js/ui/magnifier.js
View File

@ -766,6 +766,9 @@ const ZoomRegion = new Lang.Class({
} else {
this._destroyActors();
}
this._syncCaretTracking();
this._syncFocusTracking();
},
/**
@ -825,10 +828,7 @@ const ZoomRegion = new Lang.Class({
*/
setFocusTrackingMode: function(mode) {
this._focusTrackingMode = mode;
if (this._focusTrackingMode == GDesktopEnums.MagnifierFocusTrackingMode.NONE)
this._focusCaretTracker.deregisterFocusListener();
else
this._focusCaretTracker.registerFocusListener();
this._syncFocusTracking();
},
/**
@ -837,10 +837,27 @@ const ZoomRegion = new Lang.Class({
*/
setCaretTrackingMode: function(mode) {
this._caretTrackingMode = mode;
if (this._caretTrackingMode == GDesktopEnums.MagnifierCaretTrackingMode.NONE)
this._focusCaretTracker.deregisterCaretListener();
this._syncCaretTracking();
},
_syncFocusTracking: function() {
let enabled = this._focusTrackingMode != GDesktopEnums.MagnifierFocusTrackingMode.NONE &&
this.isActive();
if (enabled)
this._focusCaretTracker.registerFocusListener();
else
this._focusCaretTracker.deregisterFocusListener();
},
_syncCaretTracking: function() {
let enabled = this._caretTrackingMode != GDesktopEnums.MagnifierCaretTrackingMode.NONE &&
this.isActive();
if (enabled)
this._focusCaretTracker.registerCaretListener();
else
this._focusCaretTracker.deregisterCaretListener();
},
/**