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/*
* Copyright (C) 2011 The Android Open Source Project
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package com.android.ddmuilib.heap;
import org.eclipse.jface.viewers.ILazyTreeContentProvider;
import org.eclipse.jface.viewers.TreeViewer;
import org.eclipse.jface.viewers.Viewer;
import java.util.List;
/**
* Content Provider for the native heap tree viewer in {@link NativeHeapPanel}.
* It expects input of type {@link NativeHeapSnapshot}, and provides heap allocations
* grouped by library to the UI.
*/
public class NativeHeapProviderByLibrary implements ILazyTreeContentProvider {
private TreeViewer mViewer;
private boolean mDisplayZygoteMemory;
public NativeHeapProviderByLibrary(TreeViewer viewer, boolean displayZygotes) {
mViewer = viewer;
mDisplayZygoteMemory = displayZygotes;
}
@Override
public void dispose() {
}
@Override
public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
}
@Override
public Object getParent(Object element) {
return null;
}
@Override
public void updateChildCount(Object element, int currentChildCount) {
int childCount = 0;
if (element instanceof NativeHeapSnapshot) {
NativeHeapSnapshot snapshot = (NativeHeapSnapshot) element;
childCount = getLibraryAllocations(snapshot).size();
}
mViewer.setChildCount(element, childCount);
}
@Override
public void updateElement(Object parent, int index) {
Object item = null;
int childCount = 0;
if (parent instanceof NativeHeapSnapshot) { // root element
NativeHeapSnapshot snapshot = (NativeHeapSnapshot) parent;
item = getLibraryAllocations(snapshot).get(index);
childCount = ((NativeLibraryAllocationInfo) item).getAllocations().size();
} else if (parent instanceof NativeLibraryAllocationInfo) {
item = ((NativeLibraryAllocationInfo) parent).getAllocations().get(index);
}
mViewer.replace(parent, index, item);
mViewer.setChildCount(item, childCount);
}
public void displayZygoteMemory(boolean en) {
mDisplayZygoteMemory = en;
}
private List<NativeLibraryAllocationInfo> getLibraryAllocations(NativeHeapSnapshot snapshot) {
if (mDisplayZygoteMemory) {
return snapshot.getAllocationsByLibrary();
} else {
return snapshot.getNonZygoteAllocationsByLibrary();
}
}
}
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