spellcheckerpreferencepage.java

Eclipse高级编程3源码(书本源码)

/*******************************************************************************
 * Copyright (c) 2003 Berthold Daum.
 * All rights reserved. This program and the accompanying materials 
 * are made available under the terms of the Common Public License v1.0
 * which accompanies this distribution, and is available at
 * http://www.eclipse.org/legal/cpl-v10.html
 * 
 * Contributors:
 *     Berthold Daum
 *******************************************************************************/
package com.bdaum.SpellChecker.preferences;

import org.eclipse.jface.preference.*;
import org.eclipse.swt.widgets.Composite;
import org.eclipse.ui.IWorkbench;
import org.eclipse.ui.IWorkbenchPreferencePage;
import org.eclipse.ui.help.WorkbenchHelp;

import com.bdaum.SpellChecker.Messages;
import com.swabunga.spell.engine.Configuration;

/**
 * This class implements the common parts of spell checker preference pages.
 */

public abstract class SpellCheckerPreferencePage extends
		FieldEditorPreferencePage implements IWorkbenchPreferencePage {

	/**
	 * Subclass of StringFieldEditor in order to check the user dictionary
	 * suffix for invalid characters
	 */
	public class UserSuffixFieldEditor extends StringFieldEditor {

		public UserSuffixFieldEditor(String name, String labelText,
				Composite parent) {
			super(name, labelText, 15, parent);
		}

		/**
		 * Checks if entered values are valid
		 * 
		 * @return - true if valid
		 */
		protected boolean doCheckState() {
			String txt = getTextControl().getText();
			for (int i = 0; i < txt.length(); i++) {
				if (!Character.isLetterOrDigit(txt.charAt(i))) {
					setErrorMessage(Messages
							.getString("SpellCheckerPreferencePage.Invalid_character_in_suffix"));
					return false;
				}
			}
			return super.doCheckState();
		}
	}

	public static final String SPELLCHECKERPREFERENCESCONTEXT = "com.bdaum.SpellChecker.preferences_context";

	/* Constructor */

	public SpellCheckerPreferencePage() {
		super(GRID);
	}

	/**
	 * Initialization
	 */
	public void init(IWorkbench workbench) {
		setDescription(Messages
				.getString("SpellCheckerPreferencePage.All_changes_will_take_effect"));
	}

	/**
	 * Get Plug-in specific workspace PreferenceStore instance
	 * 
	 * @return - preference store instance
	 */
	public abstract IPreferenceStore doGetPreferenceStore();

	/**
	 * Construct page content
	 */
	public void createControl(Composite parent) {
		super.createControl(parent);
		WorkbenchHelp.setHelp(parent.getParent(), getPreferenceHelpContextID());
	}

	/**
	 * Get Help context id for this preference page
	 * 
	 * @return String - the ID for context sensitive help.
	 */
	protected String getPreferenceHelpContextID() {
		return SPELLCHECKERPREFERENCESCONTEXT;
	}

	/**
	 * Create field editors
	 */

	public void createFieldEditors() {
		Composite composite = getFieldEditorParent();
		addField(new FileFieldEditor(
				SpellCheckerPreferences.SPELL_DICTIONARY,
				Messages
						.getString("SpellCheckerPreferencePage.Spell_Dictionary_File"),
				composite));
		addField(new UserSuffixFieldEditor(
				SpellCheckerPreferences.USER_DICTIONARY,
				Messages
						.getString("SpellCheckerPreferencePage.User_Dictionary_File_Suffix"),
				composite));
		ShortIntegerFieldEditor thresholdEditor = new ShortIntegerFieldEditor(
				Configuration.SPELL_THRESHOLD,
				Messages
						.getString("SpellCheckerPreferencePage.Spell_Threshold"),
				composite, 4);
		thresholdEditor.setValidRange(0, 9999);
		addField(thresholdEditor);
		addField(new BooleanFieldEditor(
				Configuration.SPELL_IGNOREDIGITWORDS,
				Messages.getString("SpellCheckerPreferencePage.Ignore_Numbers"),
				composite));
		addField(new BooleanFieldEditor(
				SpellCheckerPreferences.IGNOREONELETTERWORDS,
				Messages
						.getString("SpellCheckerPreferencePage.Ignore_one_letter_words"),
				composite));
		addField(new BooleanFieldEditor(
				Configuration.SPELL_IGNOREMIXEDCASE,
				Messages
						.getString("SpellCheckerPreferencePage.Ignore_Mixed_Case"),
				composite));
		addField(new BooleanFieldEditor(
				Configuration.SPELL_IGNORESENTENCECAPITALIZATION,
				Messages
						.getString("SpellCheckerPreferencePage.Ignore_Sentence_Capitalization"),
				composite));
		addField(new BooleanFieldEditor(
				Configuration.SPELL_IGNOREUPPERCASE,
				Messages
						.getString("SpellCheckerPreferencePage.Ignore_Upper_Case"),
				composite));
		addField(new StringFieldEditor(
				SpellCheckerPreferences.COMPOUNDCHARACTERS,
				Messages
						.getString("SpellCheckerPreferencePage.CompoundCharacters"),
				15, composite));
	}
}