Bug 575864 - avoid spinning without wait

java editor calls signalWaitForFinish when editor is opened without any
reconciling work.
Just forget that signal and spin with delay

+ wake up that waiting delay when dirty flag is set.

Change-Id: I40c74f19aa788fbd1964204ec75c3852995d8ca5
Signed-off-by: Joerg Kubitz <jkubitz-eclipse@gmx.de>
Reviewed-on: https://git.eclipse.org/r/c/platform/eclipse.platform.text/+/190780
Reviewed-by: Andrey Loskutov <loskutov@gmx.de>
Tested-by: Andrey Loskutov <loskutov@gmx.de>

org.eclipse.jface.text/src/org/eclipse/jface/text/reconciler/AbstractReconciler.java

diff --git a/org.eclipse.jface.text/src/org/eclipse/jface/text/reconciler/AbstractReconciler.java b/org.eclipse.jface.text/src/org/eclipse/jface/text/reconciler/AbstractReconciler.java
index 296dc54..c7dccfd 100644
--- a/org.eclipse.jface.text/src/org/eclipse/jface/text/reconciler/AbstractReconciler.java
+++ b/org.eclipse.jface.text/src/org/eclipse/jface/text/reconciler/AbstractReconciler.java
@@ -139,6 +139,9 @@
 					fIsDirty= true;
 					fReset= true;
 				}
+				synchronized (fDirtyRegionQueue) {
+					fDirtyRegionQueue.notifyAll(); // wake up wait(fDelay);
+				}
 
 			} else {
 
@@ -180,8 +183,10 @@
 				if (fCanceled)
 					break;
 
-				if (!isDirty())
+				if (!isDirty()) {
+					waitFinish= false; //signalWaitForFinish() was called but nothing todo
 					continue;
+				}
 
 				synchronized (this) {
 					if (fReset) {