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java - Eclipse AbstractTextEditor 不可编辑

问题描述

我正在编写一个 Eclipse 插件，为此我需要一个自定义的 TextEditor。TextEditor 的内容应该是从自定义 xml 结构中提取的文本。我已经完成了所有数据提取，但现在我正在为向我的 TextEditor 提供文本的任务而苦苦挣扎。我实际上可以设置一些要显示的文本并且一切正常，问题是我无法编辑它。到目前为止我的编辑器代码：

Foo编辑器：

package fooeditor.editor;

import org.eclipse.ui.texteditor.AbstractTextEditor;

public class FooEditor extends AbstractTextEditor {

    public FooEditor() {
    super();
    setSourceViewerConfiguration(new FooSourceViewerConfiguration());
    setDocumentProvider(new FooDocumentProvider());

}

}

FooSourceViewerConfiguration：包 fooeditor.editor；

import org.eclipse.jface.text.source.SourceViewerConfiguration;

public class FooSourceViewerConfiguration extends SourceViewerConfiguration     {

    public FooSourceViewerConfiguration() {

}



}

FooDocumentProvider：包 fooeditor.editor；

import org.eclipse.core.runtime.CoreException;
import org.eclipse.core.runtime.IProgressMonitor;
import org.eclipse.core.runtime.IStatus;
import org.eclipse.jface.operation.IRunnableContext;
import org.eclipse.jface.text.Document;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.IDocumentPartitioner;
import org.eclipse.jface.text.rules.DefaultPartitioner;
import org.eclipse.jface.text.rules.FastPartitioner;
import org.eclipse.jface.text.source.IAnnotationModel;
import org.eclipse.ui.part.FileEditorInput;
import org.eclipse.ui.texteditor.AbstractDocumentProvider;
import org.eclipse.ui.texteditor.IDocumentProvider;
import org.eclipse.ui.texteditor.IElementStateListener;

public class FooDocumentProvider extends AbstractDocumentProvider {

    IDocumentPartitioner partitioner;

    /**
     * 
     */
    public FooDocumentProvider() {
        super();
        partitioner = new FastPartitioner(new FooPartitionScanner(), null);
    }

    @Override
    protected IDocument createDocument(Object element) throws CoreException {
        if (element instanceof FileEditorInput) {
            IDocument document = new Document();
            document.set("hi");
            document.setDocumentPartitioner(partitioner);
            return document;

        } else {
            throw new CoreException(null);
        }

    }

    @Override
    protected IAnnotationModel createAnnotationModel(Object element) throws CoreException {
        // TODO Auto-generated method stub
        return null;
    }

    @Override
    protected void doSaveDocument(IProgressMonitor monitor, Object element, IDocument document, boolean overwrite)
        throws CoreException {
        // TODO Auto-generated method stub

    }

    @Override
    protected IRunnableContext getOperationRunner(IProgressMonitor monitor) {
        // TODO Auto-generated method stub
        return null;
    }

}

FooPartitionScanner：包 fooeditor.editor；

import java.util.ArrayList;
import java.util.List;

import org.eclipse.jface.text.rules.EndOfLineRule;
import org.eclipse.jface.text.rules.IPartitionTokenScanner;
import org.eclipse.jface.text.rules.IPredicateRule;
import org.eclipse.jface.text.rules.IToken;
import org.eclipse.jface.text.rules.RuleBasedPartitionScanner;
import org.eclipse.jface.text.rules.Token;

public class FooPartitionScanner extends RuleBasedPartitionScanner implements IPartitionTokenScanner {

    public FooPartitionScanner() {
        super();
        List rules = new ArrayList();

        IPredicateRule[] result = new IPredicateRule[rules.size()];
        rules.toArray(result);
        setPredicateRules(result);

    }

}

标签： javaeclipseeclipse-plugin

解决方案

AbstractTextEditor根据isEditable方法的结果设置文本是否可编辑。这个的默认代码是：

@Override
public boolean isEditable() {
    IDocumentProvider provider= getDocumentProvider();
    if (provider instanceof IDocumentProviderExtension) {
        IDocumentProviderExtension extension= (IDocumentProviderExtension) provider;
        return extension.isModifiable(getEditorInput());
    }
    return false;
}

AbstractDocumentProvider您正在扩展的确实实现了IDocumentProviderExtension，但默认实现isModifiable是：

@Override
public boolean isModifiable(Object element) {
    return false;
}

所以你需要覆盖它（或者看看 using StorageDocumentProvider）。

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