Package org.drools.guvnor.client.asseteditor

Source Code of org.drools.guvnor.client.asseteditor.DefaultRuleContentWidget

/*
* Copyright 2005 JBoss Inc
*
* 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 org.drools.guvnor.client.asseteditor;

import com.google.gwt.event.dom.client.*;
import com.google.gwt.event.shared.EventBus;
import com.google.gwt.user.client.ui.TextArea;

import org.drools.guvnor.client.common.DirtyableComposite;
import org.drools.guvnor.client.explorer.ClientFactory;
import org.drools.guvnor.client.rpc.Asset;
import org.drools.guvnor.client.rpc.RuleContentText;

/**
* This is the default rule editor widget (just text editor based) - more to come later.
*/
public class DefaultRuleContentWidget extends DirtyableComposite
        implements
        EditorWidget {

    private TextArea text;
    final private RuleContentText data;

    public DefaultRuleContentWidget(Asset a,
                                    RuleViewer v,
                                    ClientFactory clientFactory,
                                    EventBus eventBus) {
        this(a);
    }

    public DefaultRuleContentWidget(Asset a) {
        this(a,
                -1);
    }

    public DefaultRuleContentWidget(Asset a,
                                    int visibleLines) {
        Asset asset = a;
        data = (RuleContentText) asset.getContent();

        if (data.content == null) {
            data.content = "";
        }

        text = new TextArea();
        text.setWidth("100%");
        text.setVisibleLines((visibleLines == -1) ? 16 : visibleLines);
        text.setText(data.content);

        text.getElement().setAttribute("spellcheck",
                "false"); //NON-NLS

        text.setStyleName("default-text-Area"); //NON-NLS

        text.addChangeHandler(new ChangeHandler() {
            public void onChange(ChangeEvent event) {
                data.content = text.getText();
                makeDirty();
            }
        });

        text.addKeyDownHandler(new KeyDownHandler() {

            public void onKeyDown(KeyDownEvent event) {
                if (event.getNativeKeyCode() == KeyCodes.KEY_TAB) {
                    int pos = text.getCursorPos();
                    insertText("\t");
                    text.setCursorPos(pos + 1);
                    text.cancelKey();
                    text.setFocus(true);
                }
            }
        });

        initWidget(text);

    }

    public void insertText(String ins) {
        int i = text.getCursorPos();
        String left = text.getText().substring(0,
                i);
        String right = text.getText().substring(i,
                text.getText().length());
        text.setText(left + ins + right);
        this.data.content = text.getText();
    }

}
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