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Code Issues Projects Releases Wiki Activity

dispose nodes instead of manual GC

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This commit is contained in:
Kyle Spearrin 2017-02-20 18:22:24 -05:00
parent 1d23bcc979
commit c01d02de27
1 changed files with 46 additions and 32 deletions
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78
src/Android/AutofillService.cs
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@ -51,9 +51,6 @@ namespace Bit.Android
new Browser("com.ksmobile.cb", "address_bar_edit_text") new Browser("com.ksmobile.cb", "address_bar_edit_text")
}.ToDictionary(n => n.PackageName); }.ToDictionary(n => n.PackageName);
private long _lastGc = 0;
private int _eventCounter = 0;
public override void OnAccessibilityEvent(AccessibilityEvent e) public override void OnAccessibilityEvent(AccessibilityEvent e)
{ {
var root = RootInActiveWindow; var root = RootInActiveWindow;
@ -64,10 +61,13 @@ namespace Bit.Android
} }
/* /*
var testNodes = GetWindowNodes(root, e, n => n.ViewIdResourceName != null && n.Text != null) var testNodes = GetWindowNodes(root, e, n => n.ViewIdResourceName != null && n.Text != null, false);
.Select(n => new { id = n.ViewIdResourceName, text = n.Text }); var testNodesData = testNodes.Select(n => new { id = n.ViewIdResourceName, text = n.Text });
testNodes.Dispose();
testNodes = null;
*/ */
var notificationManager = ((NotificationManager)GetSystemService(NotificationService));
switch(e.EventType) switch(e.EventType)
{ {
case EventTypes.WindowContentChanged: case EventTypes.WindowContentChanged:
@ -76,11 +76,11 @@ namespace Bit.Android
if(e.PackageName == BitwardenPackage) if(e.PackageName == BitwardenPackage)
{ {
CancelNotification(); notificationManager.Cancel(AutoFillNotificationId);
break; break;
} }
var passwordNodes = GetWindowNodes(root, e, n => n.Password); var passwordNodes = GetWindowNodes(root, e, n => n.Password, false);
if(passwordNodes.Count > 0) if(passwordNodes.Count > 0)
{ {
var uri = GetUri(root); var uri = GetUri(root);
@ -88,16 +88,18 @@ namespace Bit.Android
{ {
if(NeedToAutofill(AutofillActivity.LastCredentials, uri)) if(NeedToAutofill(AutofillActivity.LastCredentials, uri))
{ {
var allEditTexts = GetWindowNodes(root, e, n => EditText(n)); var allEditTexts = GetWindowNodes(root, e, n => EditText(n), false);
var usernameEditText = allEditTexts.TakeWhile(n => !n.Password).LastOrDefault(); var usernameEditText = allEditTexts.TakeWhile(n => !n.Password).LastOrDefault();
FillCredentials(usernameEditText, passwordNodes); FillCredentials(usernameEditText, passwordNodes);
allEditTexts.Dispose();
allEditTexts = null; allEditTexts = null;
usernameEditText.Dispose();
usernameEditText = null; usernameEditText = null;
} }
else else
{ {
NotifyToAutofill(uri); NotifyToAutofill(uri, notificationManager);
cancelNotification = false; cancelNotification = false;
} }
} }
@ -105,27 +107,23 @@ namespace Bit.Android
AutofillActivity.LastCredentials = null; AutofillActivity.LastCredentials = null;
} }
passwordNodes.Dispose();
passwordNodes = null; passwordNodes = null;
if(cancelNotification) if(cancelNotification)
{ {
CancelNotification(); notificationManager.Cancel(AutoFillNotificationId);
} }
break; break;
default: default:
break; break;
} }
notificationManager.Dispose();
notificationManager = null;
root.Dispose();
root = null; root = null;
e.Dispose();
// Do some manual GCing
_eventCounter++;
var now = Java.Lang.JavaSystem.CurrentTimeMillis();
if((now - _lastGc) > 60000 && _eventCounter >= 20)
{
GC.Collect(0);
_lastGc = now;
_eventCounter = 0;
}
} }
public override void OnInterrupt() public override void OnInterrupt()
@ -133,12 +131,6 @@ namespace Bit.Android
} }
private void CancelNotification()
{
var notificationManager = ((NotificationManager)GetSystemService(NotificationService));
notificationManager.Cancel(AutoFillNotificationId);
}
private string GetUri(AccessibilityNodeInfo root) private string GetUri(AccessibilityNodeInfo root)
{ {
var uri = string.Concat(App.Constants.AndroidAppProtocol, root.PackageName); var uri = string.Concat(App.Constants.AndroidAppProtocol, root.PackageName);
@ -149,6 +141,8 @@ namespace Bit.Android
if(addressNode != null) if(addressNode != null)
{ {
uri = ExtractUri(uri, addressNode, SupportedBrowsers[root.PackageName]); uri = ExtractUri(uri, addressNode, SupportedBrowsers[root.PackageName]);
addressNode.Dispose();
addressNode = null;
} }
} }
@ -210,7 +204,7 @@ namespace Bit.Android
return n.ClassName != null && n.ClassName.Contains("EditText"); return n.ClassName != null && n.ClassName.Contains("EditText");
} }
private void NotifyToAutofill(string uri) private void NotifyToAutofill(string uri, NotificationManager notificationManager)
{ {
var intent = new Intent(this, typeof(AutofillActivity)); var intent = new Intent(this, typeof(AutofillActivity));
intent.PutExtra("uri", uri); intent.PutExtra("uri", uri);
@ -232,8 +226,10 @@ namespace Bit.Android
Resource.Color.primary)); Resource.Color.primary));
} }
var notificationManager = (NotificationManager)GetSystemService(NotificationService);
notificationManager.Notify(AutoFillNotificationId, builder.Build()); notificationManager.Notify(AutoFillNotificationId, builder.Build());
builder.Dispose();
builder = null;
} }
private void FillCredentials(AccessibilityNodeInfo usernameNode, IEnumerable<AccessibilityNodeInfo> passwordNodes) private void FillCredentials(AccessibilityNodeInfo usernameNode, IEnumerable<AccessibilityNodeInfo> passwordNodes)
@ -257,24 +253,31 @@ namespace Bit.Android
editTextNode.PerformAction(global::Android.Views.Accessibility.Action.SetText, bundle); editTextNode.PerformAction(global::Android.Views.Accessibility.Action.SetText, bundle);
} }
private List<AccessibilityNodeInfo> GetWindowNodes(AccessibilityNodeInfo n, private NodeList GetWindowNodes(AccessibilityNodeInfo n, AccessibilityEvent e,
AccessibilityEvent e, Func<AccessibilityNodeInfo, bool> condition, List<AccessibilityNodeInfo> nodes = null) Func<AccessibilityNodeInfo, bool> condition, bool disposeIfUnused, NodeList nodes = null)
{ {
if(nodes == null) if(nodes == null)
{ {
nodes = new List<AccessibilityNodeInfo>(); nodes = new NodeList();
} }
if(n != null) if(n != null)
{ {
var dispose = disposeIfUnused;
if(n.WindowId == e.WindowId && !(n.ViewIdResourceName?.StartsWith(SystemUiPackage) ?? false) && condition(n)) if(n.WindowId == e.WindowId && !(n.ViewIdResourceName?.StartsWith(SystemUiPackage) ?? false) && condition(n))
{ {
dispose = false;
nodes.Add(n); nodes.Add(n);
} }
for(var i = 0; i < n.ChildCount; i++) for(var i = 0; i < n.ChildCount; i++)
{ {
GetWindowNodes(n.GetChild(i), e, condition, nodes); GetWindowNodes(n.GetChild(i), e, condition, true, nodes);
}
if(dispose)
{
n.Dispose();
} }
} }
@ -299,5 +302,16 @@ namespace Bit.Android
public string UriViewId { get; set; } public string UriViewId { get; set; }
public Func<string, string> GetUriFunction { get; set; } = (s) => s; public Func<string, string> GetUriFunction { get; set; } = (s) => s;
} }
public class NodeList : List<AccessibilityNodeInfo>, IDisposable
{
public void Dispose()
{
foreach(var item in this)
{
item.Dispose();
}
}
}
} }
} }