com.javadude.antxr.eclipse.ui.actions.TogglePresentationAction.java Source code

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Here is the source code for com.javadude.antxr.eclipse.ui.actions.TogglePresentationAction.java

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/*******************************************************************************
 * Copyright (c) 2008 Scott Stanchfield, based on ANTLR-Eclipse plugin
 *   by Torsten Juergeleit.
 * All rights reserved. This program and the accompanying materials
 * are made available under the terms of the Eclipse Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/epl-v10.html
 *
 * Contributors
 *    Torsten Juergeleit - original ANTLR Eclipse plugin
 *    Scott Stanchfield - modifications for ANTXR
 *******************************************************************************/
package com.javadude.antxr.eclipse.ui.actions;

import org.eclipse.jface.preference.IPreferenceStore;
import org.eclipse.jface.text.IRegion;
import org.eclipse.ui.texteditor.ITextEditor;
import org.eclipse.ui.texteditor.TextEditorAction;

import com.javadude.antxr.eclipse.ui.AntxrUIPlugin;
import com.javadude.antxr.eclipse.ui.AntxrUIPluginImages;
import com.javadude.antxr.eclipse.ui.IPreferencesConstants;

/**
 * A toolbar action which toggles the presentation model of the connected text
 * editor. The editor shows either the highlight range only or always the
 * whole document.
 */
public class TogglePresentationAction extends TextEditorAction {
    private static final String PREFIX = "Editor.TogglePresentation";

    /**
     * Constructs and updates the action.
     */
    public TogglePresentationAction() {
        super(AntxrUIPlugin.getDefault().getResourceBundle(), TogglePresentationAction.PREFIX, null);
        AntxrUIPluginImages.setToolImageDescriptors(this, "segment_edit.gif");
        update();
    }

    /** {@inheritDoc} */
    public void run() {
        ITextEditor editor = getTextEditor();
        if (editor != null) {
            IRegion remembered = editor.getHighlightRange();
            editor.resetHighlightRange();

            boolean showAll = !editor.showsHighlightRangeOnly();
            setChecked(showAll);
            setToolTipText(getToolTipText(showAll));

            editor.showHighlightRangeOnly(showAll);
            if (remembered != null) {
                editor.setHighlightRange(remembered.getOffset(), remembered.getLength(), true);
            }

            IPreferenceStore store = AntxrUIPlugin.getDefault().getPreferenceStore();
            store.setValue(IPreferencesConstants.EDITOR_SHOW_SEGMENTS, showAll);
        }
    }

    /** {@inheritDoc} */
    public void update() {
        ITextEditor editor = getTextEditor();
        boolean checked = (editor != null && editor.showsHighlightRangeOnly());
        setChecked(checked);
        setToolTipText(getToolTipText(checked));
        setEnabled(true);
    }

    /** {@inheritDoc} */
    public void setEditor(ITextEditor anEditor) {
        super.setEditor(anEditor);

        if (anEditor != null) {
            IPreferenceStore store = AntxrUIPlugin.getDefault().getPreferenceStore();
            boolean showSegments = store.getBoolean(IPreferencesConstants.EDITOR_SHOW_SEGMENTS);
            if (isChecked() != showSegments) {
                setChecked(showSegments);
                setToolTipText(getToolTipText(showSegments));
            }

            if (anEditor.showsHighlightRangeOnly() != showSegments) {
                IRegion remembered = anEditor.getHighlightRange();
                anEditor.resetHighlightRange();
                anEditor.showHighlightRangeOnly(showSegments);
                if (remembered != null) {
                    anEditor.setHighlightRange(remembered.getOffset(), remembered.getLength(), true);
                }
            }
        }
    }

    private String getToolTipText(boolean anIsChecked) {
        return (anIsChecked ? AntxrUIPlugin.getMessage(TogglePresentationAction.PREFIX + ".tooltip.checked")
                : AntxrUIPlugin.getMessage(TogglePresentationAction.PREFIX + ".tooltip.unchecked"));
    }
}