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package bndtools.editor.pages;

import org.eclipse.jface.action.Action;
import org.eclipse.jface.text.IDocument;
import org.eclipse.jface.text.contentassist.ICompletionProposal;
import org.eclipse.swt.graphics.Point;
import org.eclipse.ui.forms.editor.FormEditor;
import org.eclipse.ui.texteditor.ITextEditor;

public class ApplyCompletionProposalAction extends Action {

	private final ICompletionProposal	proposal;
	private final ITextEditor			textEditor;
	private final FormEditor			mainEditor;
	private final String				switchToPageId;

	public ApplyCompletionProposalAction(ICompletionProposal proposal, ITextEditor textEditor, FormEditor mainEditor,
		String switchToPageId) {
		this.proposal = proposal;
		this.textEditor = textEditor;
		this.mainEditor = mainEditor;
		this.switchToPageId = switchToPageId;
	}

	@Override
	public String getText() {
		return proposal.getDisplayString();
	}

	@Override
	public void run() {
		assert (proposal != null);
		assert (textEditor != null);
		assert (mainEditor != null);
		assert (switchToPageId != null);

		mainEditor.setActivePage(switchToPageId);

		IDocument document = textEditor.getDocumentProvider()
			.getDocument(mainEditor.getEditorInput());
		proposal.apply(document);

		Point selection = proposal.getSelection(document);
		if (selection != null)
			textEditor.selectAndReveal(selection.x, 0);
	}
}