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package org.jetbrains.debugger;
import com.intellij.xdebugger.frame.XCompositeNode;
import com.intellij.xdebugger.frame.XValueChildrenList;
import com.intellij.xdebugger.frame.XValueGroup;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import org.jetbrains.debugger.values.ObjectValue;
import org.jetbrains.debugger.values.ValueType;
import java.util.ArrayList;
import java.util.List;
public final class LazyVariablesGroup extends XValueGroup {
public static final ValueGroupFactory<ObjectValue> GROUP_FACTORY = new ValueGroupFactory<ObjectValue>() {
@Override
public XValueGroup create(@NotNull ObjectValue value, int start, int end, @NotNull VariableContext context) {
return new LazyVariablesGroup(value, start, end, context);
}
};
private final ObjectValue value;
private final int startInclusive;
private final int endInclusive;
private final VariableContext context;
private final ValueType componentType;
private final boolean sparse;
public LazyVariablesGroup(@NotNull ObjectValue value, int startInclusive, int endInclusive, @NotNull VariableContext context) {
this(value, startInclusive, endInclusive, context, null, true);
}
public LazyVariablesGroup(@NotNull ObjectValue value, int startInclusive, int endInclusive, @NotNull VariableContext context, @Nullable ValueType componentType, boolean sparse) {
super(String.format("[%,d \u2026 %,d]", startInclusive, endInclusive));
this.value = value;
this.startInclusive = startInclusive;
this.endInclusive = endInclusive;
this.context = context;
this.componentType = componentType;
this.sparse = sparse;
}
@Override
public void computeChildren(@NotNull XCompositeNode node) {
node.setAlreadySorted(true);
int bucketThreshold = XCompositeNode.MAX_CHILDREN_TO_SHOW;
if (!sparse && (endInclusive - startInclusive) > bucketThreshold) {
node.addChildren(XValueChildrenList.topGroups(computeNotSparseGroups(value, context, startInclusive, endInclusive + 1, bucketThreshold)), true);
return;
}
value.getIndexedProperties(startInclusive, endInclusive + 1, bucketThreshold, new VariableView.ObsolescentIndexedVariablesConsumer(node) {
@Override
public void consumeRanges(@Nullable int[] ranges) {
if (ranges == null) {
XValueChildrenList groupList = new XValueChildrenList();
addGroups(value, GROUP_FACTORY, groupList, startInclusive, endInclusive, XCompositeNode.MAX_CHILDREN_TO_SHOW, context);
node.addChildren(groupList, true);
}
else {
addRanges(value, ranges, node, context, true);
}
}
@Override
public void consumeVariables(@NotNull List<Variable> variables) {
node.addChildren(Variables.createVariablesList(variables, context, null), true);
}
}, componentType);
}
@NotNull
public static List<XValueGroup> computeNotSparseGroups(@NotNull ObjectValue value, @NotNull VariableContext context, int fromInclusive, int toExclusive, int bucketThreshold) {
int size = toExclusive - fromInclusive;
int bucketSize = (int)Math.pow(bucketThreshold, Math.ceil(Math.log(size) / Math.log(bucketThreshold)) - 1);
List<XValueGroup> groupList = new ArrayList<XValueGroup>((int)Math.ceil(size / bucketSize));
for (; fromInclusive < toExclusive; fromInclusive += bucketSize) {
groupList.add(new LazyVariablesGroup(value, fromInclusive, fromInclusive + (Math.min(bucketSize, toExclusive - fromInclusive) - 1), context, ValueType.NUMBER, false));
}
return groupList;
}
public static void addRanges(@NotNull ObjectValue value, int[] ranges, @NotNull XCompositeNode node, @NotNull VariableContext context, boolean isLast) {
XValueChildrenList groupList = new XValueChildrenList(ranges.length / 2);
for (int i = 0, n = ranges.length; i < n; i += 2) {
groupList.addTopGroup(new LazyVariablesGroup(value, ranges[i], ranges[i + 1], context));
}
node.addChildren(groupList, isLast);
}
public static <T> void addGroups(@NotNull T data,
@NotNull ValueGroupFactory<T> groupFactory,
@NotNull XValueChildrenList groupList,
int from,
int limit,
int bucketSize,
@NotNull VariableContext context) {
int to = Math.min(bucketSize, limit);
boolean done = false;
do {
int groupFrom = from;
int groupTo = to;
from += bucketSize;
to = from + Math.min(bucketSize, limit - from);
// don't create group for only one member
if (to - from == 1) {
groupTo++;
done = true;
}
groupList.addTopGroup(groupFactory.create(data, groupFrom, groupTo, context));
if (from >= limit) {
break;
}
}
while (!done);
}
}
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