[英]Eclipse Plugin IFile read-only property change
我正在開發一個Eclipse插件,它以只讀狀態加載所有項目文件(IFile)。
ResourceAttributes resAttr = new ResourceAttributes();
resAttr.setReadOnly(true);
classFile.setResourceAttributes(resAttr);
現在,當用戶開始在JavaEditor中編寫內容時,將顯示一個消息框:
File ABC.java is read-only. Do you wish to make it writable?
我想捕獲用戶的答案,因為有些文件不應該是只讀的。
為了做到這一點,我已經實現了一個IElementChangedListener,但我不知道如果IFile只讀屬性發生了變化。
class SinfoniaCloudElementChangedListener implements IElementChangedListener {
@Override
public void elementChanged(ElementChangedEvent event) {
Activator.logInfo("SinfoniaCloudElementChangedListener - elementChanged");
try {
handleDelta(event.getDelta());
} catch (JavaModelException e) {
Activator.logError("Error handling delta for ElementChangeListener. ", e);
}
}
private void handleDelta(IJavaElementDelta delta) throws JavaModelException {
IJavaElement element = delta.getElement();
if (element instanceof ICompilationUnit) {
IJavaProject project = element.getJavaProject();
if (project.getElementName().equals(SinfoniaProject.getProjectName(true)) == false) {
return;
}
ICompilationUnit cu = (ICompilationUnit) element;
for (IType type : cu.getAllTypes()) {
if (type != IType.CLASS_FILE)
continue;
switch (delta.getKind()) {
case IJavaElementDelta.CHANGED:
Activator.logInfo("CHANGED - Element:" + cu.getElementName());
// ?????????????????????????????
break;
default:
// do nothing
break;
}
}
}
for (IJavaElementDelta child : delta.getAffectedChildren()) {
handleDelta(child);
}
}
}
謝謝。
==
根據Andrew的建議,IElementChangedListener被IResourceChangeListener取代,但是我仍然不知道如何識別IResource只讀屬性是否發生了變化。
class ABCResourceChangeListener implements IResourceChangeListener {
@Override
public void resourceChanged(IResourceChangeEvent event) {
IResource res = event.getResource();
try {
switch (event.getType()) {
case IResourceChangeEvent.PRE_CLOSE:
System.out.print("Project ");
System.out.print(res.getFullPath());
System.out.println(" is about to close.");
break;
case IResourceChangeEvent.PRE_DELETE:
System.out.print("Project ");
System.out.print(res.getFullPath());
System.out.println(" is about to be deleted.");
break;
case IResourceChangeEvent.POST_CHANGE:
System.out.println("Resources have changed.");
event.getDelta().accept(new DeltaPrinter());
break;
case IResourceChangeEvent.PRE_BUILD:
System.out.println("Build about to run.");
event.getDelta().accept(new DeltaPrinter());
break;
case IResourceChangeEvent.POST_BUILD:
System.out.println("Build complete.");
event.getDelta().accept(new DeltaPrinter());
break;
}
} catch (CoreException e) {
// TODO Auto-generated catch block
e.printStackTrace();
}
}
}
class DeltaPrinter implements IResourceDeltaVisitor {
public boolean visit(IResourceDelta delta) {
IResource res = delta.getResource();
switch (delta.getKind()) {
case IResourceDelta.ADDED:
System.out.print("Resource ");
System.out.print(res.getFullPath());
System.out.println(" was added.");
break;
case IResourceDelta.REMOVED:
System.out.print("Resource ");
System.out.print(res.getFullPath());
System.out.println(" was removed.");
break;
case IResourceDelta.CHANGED:
System.out.print("Resource ");
System.out.print(res.getFullPath());
System.out.println(" has changed.");
int flags = delta.getFlags();
if ((flags & IResourceDelta.CONTENT) != 0) {
System.out.println("--> Content Change");
// ?????????????????????????
}
if ((flags & IResourceDelta.REPLACED) != 0) {
System.out.println("--> Content Replaced");
}
if ((flags & IResourceDelta.MARKERS) != 0) {
System.out.println("--> Marker Change");
IMarkerDelta[] markers = delta.getMarkerDeltas();
// if interested in markers, check these deltas
for (int j=0; j<markers.length;j++) {
IMarkerDelta markerDelta = markers[j];
if (markerDelta.isSubtypeOf(IMarker.SOURCE_ID)) {
switch (markerDelta.getKind()) {
case IResourceDelta.ADDED :
System.out.println("--> Marker Delta Added " );
break;
case IResourceDelta.REMOVED :
System.out.println("--> Marker Delta Removed " );
break;
case IResourceDelta.CHANGED:
System.out.println("--> Marker Delta Changed ");
break;
}
}
}
}
break;
}
return true; // visit the children
}
}
IElementChangedListener
不是你想要的。 您應該使用IResourceChangeListener
。 偵聽器偵聽IResourceDelta
。 IResourceDelta
有一個名為getFlags()
的方法,它應該返回你想要的東西。
有關更多信息IWorkspace.addResourceChangeListener(IResourceChangeListener, int)
請參閱IWorkspace.addResourceChangeListener(IResourceChangeListener, int)
的javadoc。
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