source: release-kits/lirk3/bin/ant-installer/src/org/tp23/antinstaller/renderer/text/AbstractTextPageRenderer.java@ 14982

/* 
 * Copyright 2005 Paul Hinds
 *
 * 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.tp23.antinstaller.renderer.text;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.PrintStream;
import java.util.ResourceBundle;

import org.tp23.antinstaller.InstallException;
import org.tp23.antinstaller.InstallerContext;
import org.tp23.antinstaller.page.Page;
import org.tp23.antinstaller.renderer.PageRenderer;
/**
 * renamed from TextPageRenderer in version 0.8 to enable
 * the use of the page type TextPage, TextPageRenderer is now 
 * the renderer for these page types
 * @author teknopaul
 *
 */
public abstract class AbstractTextPageRenderer
    implements PageRenderer {

    public static final int PAGE_BLANK_LINES = 20;
    public static final int PAGE_DECO_WIDTH = 80;

    protected BufferedReader reader;
    protected PrintStream out;
    private InstallerContext ctx;


    public AbstractTextPageRenderer() {
    }

    public void setContext(InstallerContext ctx){
        this.ctx = ctx;
    }
    public InstallerContext getContext(){
        return ctx;
    }

    public void init( BufferedReader reader, PrintStream out){
        this.out = out;
        this.reader = reader;
    }
    /**
     *
     * @param page Page
     * @throws InstallException
     * @return boolean false implys user aborted
     */
    public abstract boolean renderPage(Page page) throws InstallException;

    protected void printHeader(Page page) throws IOException{
        for (int i = 0; i < PAGE_BLANK_LINES; i++) {
            out.println();
        }


        for (int i = 0; i < PAGE_DECO_WIDTH; i++) {
            out.print('~');
        }
        out.println();
        out.println("  " + page.getDisplayText());
        for (int i = 0; i < PAGE_DECO_WIDTH; i++) {
            out.print('~');
        }
        out.println();
        out.println();
        out.println();
    }

    private static final ResourceBundle res = ResourceBundle.getBundle("org.tp23.antinstaller.renderer.text.Res");
    private static final char[] affimativeChars = parseChars(res.getString("affirmativeChars"));
    
    private static char[] parseChars(String commaSeparated){
        char[] input = commaSeparated.toCharArray();
        char[] theChars = new char[input.length];
        int j = 0;
        for (int i = 0; i < input.length; i++) {
            if(Character.isWhitespace(input[i]))continue;
            if(',' == input[i]) {
                continue;
            }
            else theChars[j++] = input[i];
        }
        char[] toReturn = new char[j];
        System.arraycopy(theChars,0,toReturn,0,j);
        return toReturn;
    }

    /**
     * does the string represent true default = true
     * @param entered String
     * @return boolean
     */
    protected boolean isTrue(String entered){
        if(entered.length() == 0) {
            return true;
        }
        char first = entered.charAt(0);
        boolean isTrue= false;
        for (int i = 0; i < affimativeChars.length; i++) {
            isTrue |= Character.toUpperCase(first) == affimativeChars[i];
        }
        return isTrue;
    }
}