/*
 * @(#)PackageTreeWriter.java	1.6 98/04/17
 *
 * Copyright 1998 by Sun Microsystems, Inc.,
 * 901 San Antonio Road, Palo Alto, California, 94303, U.S.A.
 * All rights reserved.
 *
 * This software is the confidential and proprietary information
 * of Sun Microsystems, Inc. ("Confidential Information").  You
 * shall not disclose such Confidential Information and shall use
 * it only in accordance with the terms of the license agreement
 * you entered into with Sun.
 */

package com.sun.tools.doclets.standard;

import com.sun.tools.doclets.*;
import com.sun.javadoc.*;
import java.io.*;
import java.lang.*;
import java.util.*;
/**
 * Class to generate file for each package contents.
 *
 * @see com.sun.javadoc.PackageDoc
 * @see com.sun.tools.doclets.HtmlDocWriter
 * @author Atul M Dambalkar
 */
public class PackageTreeWriter extends AbstractTreeWriter {

    /**
     * Package  for which tree is to be generated.
     */
    protected PackageDoc packagedoc;

    /**
     * The previous package name in the alpha-order list.
     */
    protected PackageDoc prev;

    /**
     * The next package name in the alpha-order list.
     */
    protected PackageDoc next;

    /**
     * Constructor.
     */
    public PackageTreeWriter(String path, String filename, 
                             PackageDoc packagedoc, 
                             PackageDoc prev, PackageDoc next) 
                             throws IOException, DocletAbortException {
        super(path, filename, 
              new ClassTree(packagedoc.allClasses()), packagedoc);
        this.packagedoc = packagedoc;
        this.prev = prev;
        this.next = next;
    }

    /**
     * Generate a package page.
     *
     * @param package the package to generate.
     */
    public static void generate(PackageDoc pkg, PackageDoc prev,
                                PackageDoc next) throws DocletAbortException {
        PackageTreeWriter packgen;
        String path = DirectoryManager.getDirectoryPath(pkg);
        String filename = "tree.html";
        try {
            packgen = new PackageTreeWriter(path, filename, pkg, prev, next);
            packgen.generatePackageTreeFile();
            packgen.close();
        } catch (IOException exc) {
            Standard.configuration().standardmessage.
                error("doclet.exception_encountered", 
                       exc.toString(), filename);
            throw new DocletAbortException();
        }
    }

    /**
     * Generate a separate tree file for each package.
     */
    protected void generatePackageTreeFile() throws IOException {
        printHeader(packagedoc.name() + " " 
                    + getText("doclet.Class_Hierarchy"));
        printPackageTreeHeader();

        printLinkToMainTree();

        generateTree(classtree.baseclasses(), "doclet.Class_Hierarchy"); 
        generateTree(classtree.baseinterfaces(), "doclet.Interface_Hierarchy"); 

        printPackageTreeFooter();
        printBottom();
        printFooter();
    }

    /**
     * Print the navigation bar header for the package tree file.
     */
    protected void printPackageTreeHeader() {
        navLinks(true);
        hr();
        center();
        h2(getText("doclet.Hierarchy_For_Package") + ' ' + packagedoc.name());
        centerEnd();
    }

    /**
     * Generate a link to the tree for all the packages.
     */
    protected void printLinkToMainTree() {
        dl();
        dt();
        boldText("doclet.Package_Hierarchies");
        dd();
        navLinkMainTree(getText("doclet.All_Packages"));
        dlEnd();
        hr();
    } 

    /**
     * Print the navigation bar footer for the package tree file.
     */
    protected void printPackageTreeFooter() {
        hr();
        navLinks(false);
    }

    /**
     * Link for the previous package tree file.
     */ 
    protected void navLinkPrevious() {
        if (prev == null) {
            navLinkPrevious(null);
        } else {
            String path = DirectoryManager.getRelativePath(packagedoc.name(),
                                                           prev.name());
            navLinkPrevious(path + "tree.html");
        }
    }
    
    /**
     * Link for the next package tree file.
     */ 
    protected void navLinkNext() {
        if (next == null) {
            navLinkNext(null);
        } else {
            String path = DirectoryManager.getRelativePath(packagedoc.name(),
                                                           next.name());
            navLinkNext(path + "tree.html");
        }
    }

    protected void navLinkPackage() {
        printHyperLink("package-summary.html", getText("doclet.Package"));
    }
}