io.flutter.inspector.DiagnosticsPathNode.java Source code

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Here is the source code for io.flutter.inspector.DiagnosticsPathNode.java

Source

/*
 * Copyright 2017 The Chromium Authors. All rights reserved.
 * Use of this source code is governed by a BSD-style license that can be
 * found in the LICENSE file.
 */
package io.flutter.inspector;

import com.google.gson.JsonArray;
import com.google.gson.JsonElement;
import com.google.gson.JsonObject;

import java.util.ArrayList;

/**
 * Represents a path in a DiagnosticsNode tree used to quickly display a path
 * in the DiagnosticsNode tree in response to a change in the selected object
 * on the device.
 */
public class DiagnosticsPathNode {
    private final InspectorService.ObjectGroup inspectorService;
    private final JsonObject json;

    public DiagnosticsPathNode(JsonObject json, InspectorService.ObjectGroup inspectorService) {
        this.inspectorService = inspectorService;
        this.json = json;
    }

    public DiagnosticsNode getNode() {
        // We are lazy about getting the diagnosticNode instanceRef so that no additional round trips using the observatory protocol
        // are yet triggered for the typical case where properties of a node are not inspected.
        return new DiagnosticsNode(json.getAsJsonObject("node"), inspectorService, false);
    }

    public ArrayList<DiagnosticsNode> getChildren() {
        final ArrayList<DiagnosticsNode> children = new ArrayList<>();
        final JsonElement childrenElement = json.get("children");
        if (childrenElement.isJsonNull()) {
            return children;
        }
        final JsonArray childrenJson = childrenElement.getAsJsonArray();
        for (int i = 0; i < childrenJson.size(); ++i) {
            children.add(new DiagnosticsNode(childrenJson.get(i).getAsJsonObject(), inspectorService, false));
        }
        return children;
    }

    /**
     * Returns the index of the child that continues the path if any.
     */
    public int getChildIndex() {
        final JsonElement childIndex = json.get("childIndex");
        if (childIndex.isJsonNull()) {
            return -1;
        }
        return childIndex.getAsInt();
    }
}