/eclipse/plugins/com.android.ide.eclipse.ndk/src/com/android/ide/eclipse/ndk/internal/launch/NdkDebuggerTab.java

/*
 * Copyright (C) 2012 The Android Open Source Project
 *
 * Licensed under the Eclipse Public License, Version 1.0 (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.eclipse.org/org/documents/epl-v10.php
 *
 * 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.ide.eclipse.ndk.internal.launch;

import com.android.ide.eclipse.ndk.internal.NdkHelper;
import com.android.ide.eclipse.ndk.internal.NdkManager;

import org.eclipse.cdt.dsf.gdb.IGDBLaunchConfigurationConstants;
import org.eclipse.core.runtime.CoreException;
import org.eclipse.debug.core.ILaunchConfiguration;
import org.eclipse.debug.core.ILaunchConfigurationWorkingCopy;
import org.eclipse.debug.ui.AbstractLaunchConfigurationTab;
import org.eclipse.swt.SWT;
import org.eclipse.swt.events.ModifyEvent;
import org.eclipse.swt.events.ModifyListener;
import org.eclipse.swt.events.SelectionAdapter;
import org.eclipse.swt.events.SelectionEvent;
import org.eclipse.swt.events.SelectionListener;
import org.eclipse.swt.layout.GridData;
import org.eclipse.swt.layout.GridLayout;
import org.eclipse.swt.layout.RowLayout;
import org.eclipse.swt.widgets.Button;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.swt.widgets.Control;
import org.eclipse.swt.widgets.DirectoryDialog;
import org.eclipse.swt.widgets.FileDialog;
import org.eclipse.swt.widgets.Group;
import org.eclipse.swt.widgets.Label;
import org.eclipse.swt.widgets.Shell;
import org.eclipse.swt.widgets.Text;

import java.io.File;
import java.util.Arrays;
import java.util.Collections;
import java.util.List;

public class NdkDebuggerTab extends AbstractLaunchConfigurationTab {
    private static String sLastGdbPath;
    private static String sLastSolibPath;

    private Text mGdbPathText;
    private Text mGdbInitPathText;
    private Text mGdbRemotePortText;

    private org.eclipse.swt.widgets.List mSoliblist;
    private Button mAddSolibButton;
    private Button mDeleteSolibButton;

    /**
     * @wbp.parser.entryPoint (Window Builder Entry Point)
     */
    @Override
    public void createControl(Composite parent) {
        Composite comp = new Composite(parent, SWT.NONE);
        setControl(comp);
        comp.setLayout(new GridLayout(1, false));

        Group grpGdb = new Group(comp, SWT.NONE);
        grpGdb.setText("Launch Options");
        grpGdb.setLayout(new GridLayout(3, false));
        grpGdb.setLayoutData(new GridData(GridData.FILL_HORIZONTAL));

        Label lblDebugger = new Label(grpGdb, SWT.NONE);
        lblDebugger.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
        lblDebugger.setText("Debugger:");

        mGdbPathText = new Text(grpGdb, SWT.BORDER);
        mGdbPathText.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));

        final Button btnBrowseGdb = new Button(grpGdb, SWT.NONE);
        btnBrowseGdb.setText("Browse...");

        Label lblNewLabel = new Label(grpGdb, SWT.NONE);
        lblNewLabel.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
        lblNewLabel.setText("GDB Command File:");

        mGdbInitPathText = new Text(grpGdb, SWT.BORDER);
        mGdbInitPathText.setLayoutData(new GridData(SWT.FILL, SWT.CENTER, true, false, 1, 1));

        final Button btnBrowseGdbInit = new Button(grpGdb, SWT.NONE);
        btnBrowseGdbInit.setText("Browse...");

        SelectionListener browseListener = new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                Shell shell = ((Control) e.getSource()).getShell();
                if (e.getSource() == btnBrowseGdb) {
                    browseForGdb(shell);
                } else {
                    browseForGdbInit(shell);
                }
                checkParameters();
                updateLaunchConfigurationDialog();
            }
        };
        btnBrowseGdb.addSelectionListener(browseListener);
        btnBrowseGdbInit.addSelectionListener(browseListener);

        Label lblPort = new Label(grpGdb, SWT.NONE);
        lblPort.setLayoutData(new GridData(SWT.RIGHT, SWT.CENTER, false, false, 1, 1));
        lblPort.setText("Port:");

        mGdbRemotePortText = new Text(grpGdb, SWT.BORDER);
        GridData gd_text_2 = new GridData(SWT.LEFT, SWT.CENTER, false, false, 1, 1);
        gd_text_2.widthHint = 100;
        mGdbRemotePortText.setLayoutData(gd_text_2);

        ModifyListener m = new ModifyListener() {
            @Override
            public void modifyText(ModifyEvent e) {
                checkParameters();
                updateLaunchConfigurationDialog();
            }
        };
        mGdbPathText.addModifyListener(m);
        mGdbInitPathText.addModifyListener(m);
        mGdbRemotePortText.addModifyListener(m);

        Group grpSharedLibraries = new Group(comp, SWT.NONE);
        grpSharedLibraries.setText("Shared Libraries");
        grpSharedLibraries.setLayout(new GridLayout(2, false));
        GridData gd_grpSharedLibraries = new GridData(GridData.FILL_BOTH);
        gd_grpSharedLibraries.verticalAlignment = SWT.TOP;
        gd_grpSharedLibraries.grabExcessVerticalSpace = true;
        grpSharedLibraries.setLayoutData(gd_grpSharedLibraries);

        mSoliblist = new org.eclipse.swt.widgets.List(grpSharedLibraries,
                SWT.BORDER | SWT.V_SCROLL | SWT.SINGLE);
        GridData gd_list = new GridData(GridData.FILL_BOTH);
        gd_list.heightHint = 133;
        gd_list.grabExcessVerticalSpace = false;
        gd_list.verticalSpan = 1;
        mSoliblist.setLayoutData(gd_list);

        Composite composite = new Composite(grpSharedLibraries, SWT.NONE);
        composite.setLayoutData(new GridData(SWT.LEFT, SWT.TOP, false, false, 1, 1));
        composite.setLayout(new RowLayout(SWT.VERTICAL));

        mAddSolibButton = new Button(composite, SWT.NONE);
        mAddSolibButton.setText("Add...");

        mDeleteSolibButton = new Button(composite, SWT.NONE);
        mDeleteSolibButton.setText("Remove");
        mDeleteSolibButton.setEnabled(false);

        SelectionListener l = new SelectionAdapter() {
            @Override
            public void widgetSelected(SelectionEvent e) {
                Control c = (Control) e.getSource();
                if (c == mSoliblist) {
                    // enable delete only if there is a selection
                    mDeleteSolibButton.setEnabled(mSoliblist.getSelectionCount() > 0);
                } else if (c == mAddSolibButton) {
                    addSolib(c.getShell());
                } else {
                    // delete current selection
                    int index = mSoliblist.getSelectionIndex();
                    if (index >= 0) {
                        mSoliblist.remove(index);
                    }
                }
                updateLaunchConfigurationDialog();
            }
        };

        mSoliblist.addSelectionListener(l);
        mAddSolibButton.addSelectionListener(l);
        mDeleteSolibButton.addSelectionListener(l);
    }

    private void addSolib(Shell shell) {
        DirectoryDialog dd = new DirectoryDialog(shell);
        if (sLastSolibPath != null) {
            dd.setFilterPath(sLastSolibPath);
        }
        String solibPath = dd.open();

        if (solibPath != null) {
            mSoliblist.add(solibPath);
            sLastSolibPath = new File(solibPath).getParent();
        }
    }

    private void browseForGdb(Shell shell) {
        if (sLastGdbPath == null) {
            sLastGdbPath = NdkManager.getNdkLocation();
        }

        FileDialog fd = new FileDialog(shell);
        fd.setFilterPath(sLastGdbPath);

        String gdbPath = fd.open();
        if (gdbPath != null) {
            mGdbPathText.setText(gdbPath);
            sLastGdbPath = new File(gdbPath).getParent();
        }
    }

    private void browseForGdbInit(Shell shell) {
        FileDialog fd = new FileDialog(shell);
        String gdbInit = fd.open();
        if (gdbInit != null) {
            mGdbInitPathText.setText(gdbInit);
        }
    }

    private void checkParameters() {
        // check gdb path
        String gdb = mGdbPathText.getText().trim();
        if (!gdb.equals(NdkLaunchConstants.DEFAULT_GDB)) {
            File f = new File(gdb);
            if (!f.exists() || !f.canExecute()) {
                setErrorMessage("Invalid gdb location.");
                return;
            }
        }

        // check gdb init path
        String gdbInit = mGdbInitPathText.getText().trim();
        if (!gdbInit.isEmpty()) {
            File f = new File(gdbInit);
            if (!f.exists() || !f.isFile()) {
                setErrorMessage("Invalid gdbinit location.");
                return;
            }
        }

        // port should be a valid integer
        String port = mGdbRemotePortText.getText().trim();
        try {
            Integer.parseInt(port, 10);
        } catch (NumberFormatException e) {
            setErrorMessage("Port should be a valid integer");
            return;
        }

        // no errors
        setErrorMessage(null);
        setMessage(null);
    }

    @Override
    public void setDefaults(ILaunchConfigurationWorkingCopy config) {
        NdkHelper.setLaunchConfigDefaults(config);
    }

    @Override
    public void initializeFrom(ILaunchConfiguration config) {
        mGdbPathText.setText(getAttribute(config, NdkLaunchConstants.ATTR_NDK_GDB,
                NdkLaunchConstants.DEFAULT_GDB));
        mGdbInitPathText.setText(getAttribute(config,
                IGDBLaunchConfigurationConstants.ATTR_GDB_INIT,
                NdkLaunchConstants.DEFAULT_GDBINIT));
        mGdbRemotePortText.setText(getAttribute(config, IGDBLaunchConfigurationConstants.ATTR_PORT,
                NdkLaunchConstants.DEFAULT_GDB_PORT));

        List<String> solibs = getAttribute(config, NdkLaunchConstants.ATTR_NDK_SOLIB,
                                                                    Collections.EMPTY_LIST);
        mSoliblist.removeAll();
        for (String s: solibs) {
            mSoliblist.add(s);
        }
    }

    private String getAttribute(ILaunchConfiguration config, String key, String defaultValue) {
        try {
            return config.getAttribute(key, defaultValue);
        } catch (CoreException e) {
            return defaultValue;
        }
    }

    private List<String> getAttribute(ILaunchConfiguration config, String key,
                                                            List<String> defaultValue) {
        try {
            return config.getAttribute(key, defaultValue);
        } catch (CoreException e) {
            return defaultValue;
        }
    }

    @Override
    public void performApply(ILaunchConfigurationWorkingCopy config) {
        config.setAttribute(NdkLaunchConstants.ATTR_NDK_GDB, mGdbPathText.getText().trim());
        config.setAttribute(IGDBLaunchConfigurationConstants.ATTR_GDB_INIT,
                mGdbInitPathText.getText().trim());
        config.setAttribute(IGDBLaunchConfigurationConstants.ATTR_PORT,
                mGdbRemotePortText.getText().trim());
        config.setAttribute(NdkLaunchConstants.ATTR_NDK_SOLIB,
                Arrays.asList(mSoliblist.getItems()));
    }

    @Override
    public String getName() {
        return "Debugger";
    }
}