webcommon/javascript.v8debug/src/org/netbeans/modules/javascript/v8debug/frames/CallFrame.java

/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.netbeans.modules.javascript.v8debug.frames;

import java.util.concurrent.atomic.AtomicBoolean;
import org.netbeans.api.annotations.common.CheckForNull;
import org.netbeans.api.annotations.common.NonNull;
import org.netbeans.lib.v8debug.V8Frame;
import org.netbeans.lib.v8debug.V8Script;
import org.netbeans.lib.v8debug.vars.ReferencedValue;
import org.netbeans.lib.v8debug.vars.V8Function;
import org.netbeans.lib.v8debug.vars.V8Object;
import org.netbeans.lib.v8debug.vars.V8ScriptValue;
import org.netbeans.lib.v8debug.vars.V8Value;
import org.netbeans.modules.javascript.v8debug.ReferencedValues;
import org.netbeans.modules.javascript.v8debug.V8Debugger;
import org.netbeans.modules.javascript2.debug.NamesTranslator;
import org.netbeans.modules.web.common.sourcemap.SourceMapsTranslator;
import org.openide.filesystems.FileObject;
import org.openide.util.NbBundle;

/**
 *
 * @author Martin Entlicher
 */
public final class CallFrame {
    
    private final V8Debugger dbg;
    private final V8Frame frame;
    private final ReferencedValues rvals;
    private final boolean topFrame;
    private NamesTranslator nt;
    private final AtomicBoolean checkNamesTranslator = new AtomicBoolean(true);
    
    public CallFrame(V8Debugger dbg, V8Frame frame, ReferencedValues rvals, boolean topFrame) {
        this.dbg = dbg;
        this.frame = frame;
        this.rvals = rvals;
        this.topFrame = topFrame;
    }

    public V8Frame getFrame() {
        return frame;
    }

    public ReferencedValues getRvals() {
        return rvals;
    }
    
    public boolean isTopFrame() {
        return topFrame;
    }
    
    @CheckForNull
    public V8Script getScript() {
        long ref = frame.getScriptRef();
        V8Value val = rvals.getReferencedValue(ref);
        if (val instanceof V8ScriptValue) {
            return ((V8ScriptValue) val).getScript();
        } else {
            return null;
        }
    }
    
    @CheckForNull
    public String getThisName() {
        ReferencedValue receiver = frame.getReceiver();
        V8Value thisValue;
        if (receiver.hasValue()) {
            thisValue = receiver.getValue();
        } else {
            thisValue = rvals.getReferencedValue(receiver.getReference());
        }
        if (!(thisValue instanceof V8Object)) {
            return null;
        }
        String className = ((V8Object) thisValue).getClassName();
        NamesTranslator nt = getNamesTranslator();
        if (nt != null) {
            className = nt.translate(className);
        }
        return className;
    }
    
    @NonNull
    @NbBundle.Messages("CTL_anonymousFunction=anonymous")
    public String getFunctionName() {
        ReferencedValue functionRV = frame.getFunction();
        V8Value functionValue;
        if (functionRV.hasValue()) {
            functionValue = functionRV.getValue();
        } else {
            functionValue = rvals.getReferencedValue(functionRV.getReference());
        }
        String name;
        if (functionValue instanceof V8Function) {
            V8Function function = (V8Function) functionValue;
            name = function.getName();
            if (name == null || name.isEmpty()) {
                name = function.getInferredName();
            }
        } else {
            name = null;
        }
        if (name == null || name.isEmpty()) {
            name = "["+Bundle.CTL_anonymousFunction()+"]";
        } else {
            NamesTranslator nt = getNamesTranslator();
            if (nt != null) {
                name = nt.translateDeclarationNodeName(name);
            }
        }
        return name;
    }
    
    @CheckForNull
    public NamesTranslator getNamesTranslator() {
        synchronized (checkNamesTranslator) {
            if (checkNamesTranslator.get()) {
                checkNamesTranslator.set(false);
                SourceMapsTranslator smt = dbg.getScriptsHandler().getSourceMapsTranslator();
                if (smt != null) {
                    V8Script script = getScript();
                    if (script != null) {
                        FileObject fo = dbg.getScriptsHandler().getFile(script);
                        int line = (int) frame.getLine();
                        int column = (int) frame.getColumn();
                        if (column < 0) {
                            column = 0;
                        } else {
                            if (line == 0) {
                                column -= dbg.getScriptsHandler().getScriptFirstLineColumnShift(fo);
                            }
                        }
                        nt = NamesTranslator.create(smt, fo, line, column);
                    }
                }
            }
            return nt;
        }
    }
    
    @CheckForNull
    public SourceMapsTranslator.Location getTranslatedLocation() {
        SourceMapsTranslator smt = dbg.getScriptsHandler().getSourceMapsTranslator();
        if (smt != null) {
            V8Script script = getScript();
            if (script != null) {
                FileObject fo = dbg.getScriptsHandler().getFile(script);
                int line = (int) frame.getLine();
                int column = (int) frame.getColumn();
                if (column < 0) {
                    column = 0;
                } else {
                    if (line == 0) {
                        column -= dbg.getScriptsHandler().getScriptFirstLineColumnShift(fo);
                    }
                }
                return smt.getSourceLocation(new SourceMapsTranslator.Location(fo, line, column));
            }
        }
        return null;
    }

}