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 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This code is free software; you can redistribute it and/or modify it
 * under the terms of the GNU General Public License version 2 only, as
 * published by the Free Software Foundation.  Oracle designates this
 * particular file as subject to the "Classpath" exception as provided
 * by Oracle in the LICENSE file that accompanied this code.
 *
 * This code is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
 * version 2 for more details (a copy is included in the LICENSE file that
 * accompanied this code).
 *
 * You should have received a copy of the GNU General Public License version
 * 2 along with this work; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
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package jdk.javadoc.internal.doclets.formats.html;

import java.util.ArrayList;
import java.util.Date;
import java.util.EnumSet;
import java.util.HashMap;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Objects;
import java.util.Set;
import java.util.function.Function;
import java.util.stream.Collectors;
import javax.lang.model.element.Element;
import javax.lang.model.element.PackageElement;
import javax.lang.model.element.TypeElement;
import javax.tools.JavaFileManager;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;

import com.sun.source.util.DocTreePath;
import jdk.javadoc.doclet.Doclet;
import jdk.javadoc.doclet.DocletEnvironment;
import jdk.javadoc.doclet.Reporter;
import jdk.javadoc.doclet.StandardDoclet;
import jdk.javadoc.doclet.Taglet;
import jdk.javadoc.internal.Versions;
import jdk.javadoc.internal.doclets.toolkit.BaseConfiguration;
import jdk.javadoc.internal.doclets.toolkit.BaseOptions;
import jdk.javadoc.internal.doclets.toolkit.DocletException;
import jdk.javadoc.internal.doclets.toolkit.Messages;
import jdk.javadoc.internal.doclets.toolkit.Resources;
import jdk.javadoc.internal.doclets.toolkit.WriterFactory;
import jdk.javadoc.internal.doclets.toolkit.util.DeprecatedAPIListBuilder;
import jdk.javadoc.internal.doclets.toolkit.util.DocFile;
import jdk.javadoc.internal.doclets.toolkit.util.DocPath;
import jdk.javadoc.internal.doclets.toolkit.util.DocPaths;
import jdk.javadoc.internal.doclets.toolkit.util.PreviewAPIListBuilder;

Configure the output based on the command-line options.

Also determine the length of the command-line option. For example,
for a option "-header" there will be a string argument associated, then the
the length of option "-header" is two. But for option "-nohelp" no argument
is needed so it's length is 1.


Also do the error checking on the options used. For example it is illegal to
use "-helpfile" option when already "-nohelp" option is used.

 
This is NOT part of any supported API.
 If you write code that depends on this, you do so at your own risk.
 This code and its internal interfaces are subject to change or
 deletion without notice.
/**
 * Configure the output based on the command-line options.
 * <p>
 * Also determine the length of the command-line option. For example,
 * for a option "-header" there will be a string argument associated, then the
 * the length of option "-header" is two. But for option "-nohelp" no argument
 * is needed so it's length is 1.
 * </p>
 * <p>
 * Also do the error checking on the options used. For example it is illegal to
 * use "-helpfile" option when already "-nohelp" option is used.
 * </p>
 *
 *  <p><b>This is NOT part of any supported API.
 *  If you write code that depends on this, you do so at your own risk.
 *  This code and its internal interfaces are subject to change or
 *  deletion without notice.</b>
 */
public class HtmlConfiguration extends BaseConfiguration {

    
Default charset for HTML.
/**
     * Default charset for HTML.
     */
    public static final String HTML_DEFAULT_CHARSET = "utf-8";

    public final Resources docResources;

    
First file to appear in the right-hand frame in the generated
documentation.
/**
     * First file to appear in the right-hand frame in the generated
     * documentation.
     */
    public DocPath topFile = DocPath.empty;

    
The TypeElement for the class file getting generated.
/**
     * The TypeElement for the class file getting generated.
     */
    public TypeElement currentTypeElement = null;  // Set this TypeElement in the ClassWriter.

    
The collections of items for the main index. This field is only initialized if options.createIndex() is true. This index is populated somewhat lazily: 1. items found in doc comments are found while generating declaration pages 2. items for elements are added in bulk before generating the index files 3. additional items are added as needed /**
     * The collections of items for the main index.
     * This field is only initialized if {@code options.createIndex()}
     * is {@code true}.
     * This index is populated somewhat lazily:
     * 1. items found in doc comments are found while generating declaration pages
     * 2. items for elements are added in bulk before generating the index files
     * 3. additional items are added as needed
     */
    protected HtmlIndexBuilder mainIndex;

    
The collection of deprecated items, if any, to be displayed on the deprecated-list page, or null if the page should not be generated. The page will not be generated if no deprecated items are to be included in the documentation, or if the page is not wanted, or if there are no deprecated elements being documented. /**
     * The collection of deprecated items, if any, to be displayed on the deprecated-list page,
     * or null if the page should not be generated.
     * The page will not be generated if {@link BaseOptions#noDeprecated() no deprecated items}
     * are to be included in the documentation,
     * or if the page is {@link HtmlOptions#noDeprecatedList() not wanted},
     * or if there are no deprecated elements being documented.
     */
    protected DeprecatedAPIListBuilder deprecatedAPIListBuilder;

    
The collection of preview items, if any, to be displayed on the preview-list page,
or null if the page should not be generated.
The page will not be generated if there are no preview elements being documented.
/**
     * The collection of preview items, if any, to be displayed on the preview-list page,
     * or null if the page should not be generated.
     * The page will not be generated if there are no preview elements being documented.
     */
    protected PreviewAPIListBuilder previewAPIListBuilder;

    public Contents contents;

    protected final Messages messages;

    public DocPaths docPaths;

    public HtmlIds htmlIds;

    public Map<Element, List<DocPath>> localStylesheetMap = new HashMap<>();

    private final HtmlOptions options;

    
Kinds of conditional pages.
/**
     * Kinds of conditional pages.
     */
    // Note: this should (eventually) be merged with Navigation.PageMode,
    // which performs a somewhat similar role
    public enum ConditionalPage {
        CONSTANT_VALUES, DEPRECATED, PREVIEW, SERIALIZED_FORM, SYSTEM_PROPERTIES
    }

    
A set of values indicating which conditional pages should be generated.
The set is computed lazily, although values must (obviously) be set before
they are required, such as when deciding whether or not to generate links
to these files in the navigation par, on each page, the help file, and so on.
/**
     * A set of values indicating which conditional pages should be generated.
     * The set is computed lazily, although values must (obviously) be set before
     * they are required, such as when deciding whether or not to generate links
     * to these files in the navigation par, on each page, the help file, and so on.
     */
    public final Set<ConditionalPage> conditionalPages;

    
Constructs the full configuration needed by the doclet, including
the format-specific part, defined in this class, and the format-independent
part, defined in the supertype.
Params:
doclet –   the doclet for this run of javadoc
locale –   the locale for the generated documentation
reporter – the reporter to use for console messages
API Note:
The doclet parameter is used when initializing tags. Some doclets (such as the StandardDoclet), may delegate to another (such as the HtmlDoclet). In such cases, the primary doclet (i.e StandardDoclet) should be provided here, and not any internal class like HtmlDoclet./**
     * Constructs the full configuration needed by the doclet, including
     * the format-specific part, defined in this class, and the format-independent
     * part, defined in the supertype.
     *
     * @apiNote The {@code doclet} parameter is used when
     * {@link Taglet#init(DocletEnvironment, Doclet) initializing tags}.
     * Some doclets (such as the {@link StandardDoclet}), may delegate to another
     * (such as the {@link HtmlDoclet}).  In such cases, the primary doclet (i.e
     * {@code StandardDoclet}) should be provided here, and not any internal
     * class like {@code HtmlDoclet}.
     *
     * @param doclet   the doclet for this run of javadoc
     * @param locale   the locale for the generated documentation
     * @param reporter the reporter to use for console messages
     */
    public HtmlConfiguration(Doclet doclet, Locale locale, Reporter reporter) {
        super(doclet, locale, reporter);

        // Use the default locale for console messages.
        Resources msgResources = new Resources(Locale.getDefault(),
                BaseConfiguration.sharedResourceBundleName,
                "jdk.javadoc.internal.doclets.formats.html.resources.standard");

        // Use the provided locale for generated docs
        // Ideally, the doc resources would be in different resource files than the
        // message resources, so that we do not have different copies of the same resources.
        if (locale.equals(Locale.getDefault())) {
            docResources = msgResources;
        } else {
            docResources = new Resources(locale,
                    BaseConfiguration.sharedResourceBundleName,
                    "jdk.javadoc.internal.doclets.formats.html.resources.standard");
        }

        messages = new Messages(this, msgResources);
        options = new HtmlOptions(this);

        Runtime.Version v;
        try {
            v = Versions.javadocVersion();
        } catch (RuntimeException e) {
            assert false : e;
            v = Runtime.version(); // arguably, the only sensible default
        }
        docletVersion = v;

        conditionalPages = EnumSet.noneOf(ConditionalPage.class);
    }
    protected void initConfiguration(DocletEnvironment docEnv,
                                     Function<String, String> resourceKeyMapper) {
        super.initConfiguration(docEnv, resourceKeyMapper);
        contents = new Contents(this);
        htmlIds = new HtmlIds(this);
    }

    private final Runtime.Version docletVersion;
    public final Date startTime = new Date();

    @Override
    public Runtime.Version getDocletVersion() {
        return docletVersion;
    }

    @Override
    public Resources getDocResources() {
        return docResources;
    }

    
Returns a utility object providing commonly used fragments of content.
Returns:
a utility object providing commonly used fragments of content/**
     * Returns a utility object providing commonly used fragments of content.
     *
     * @return a utility object providing commonly used fragments of content
     */
    public Contents getContents() {
        return Objects.requireNonNull(contents);
    }

    @Override
    public Messages getMessages() {
        return messages;
    }

    @Override
    public HtmlOptions getOptions() {
        return options;
    }

    @Override
    public boolean finishOptionSettings() {
        if (!options.validateOptions()) {
            return false;
        }
        if (!getSpecifiedTypeElements().isEmpty()) {
            Map<String, PackageElement> map = new HashMap<>();
            PackageElement pkg;
            for (TypeElement aClass : getIncludedTypeElements()) {
                pkg = utils.containingPackage(aClass);
                if (!map.containsKey(utils.getPackageName(pkg))) {
                    map.put(utils.getPackageName(pkg), pkg);
                }
            }
        }
        if (options.createIndex()) {
            mainIndex = new HtmlIndexBuilder(this);
        }
        docPaths = new DocPaths(utils);
        setCreateOverview();
        setTopFile();
        initDocLint(options.doclintOpts(), tagletManager.getAllTagletNames());
        return true;
    }

    
Decide the page which will appear first in the right-hand frame. It will
be "overview-summary.html" if "-overview" option is used or no
"-overview" but the number of packages is more than one. It will be
"package-summary.html" of the respective package if there is only one
package to document. It will be a class page(first in the sorted order),
if only classes are provided on the command line.
/**
     * Decide the page which will appear first in the right-hand frame. It will
     * be "overview-summary.html" if "-overview" option is used or no
     * "-overview" but the number of packages is more than one. It will be
     * "package-summary.html" of the respective package if there is only one
     * package to document. It will be a class page(first in the sorted order),
     * if only classes are provided on the command line.
     */
    protected void setTopFile() {
        if (!checkForDeprecation()) {
            return;
        }
        if (options.createOverview()) {
            topFile = DocPaths.INDEX;
        } else {
            if (showModules) {
                topFile = DocPath.empty.resolve(docPaths.moduleSummary(modules.first()));
            } else if (packages.size() == 1 && packages.first().isUnnamed()) {
                List<TypeElement> classes = new ArrayList<>(getIncludedTypeElements());
                if (!classes.isEmpty()) {
                    TypeElement te = getValidClass(classes);
                    topFile = docPaths.forClass(te);
                }
            } else if (!packages.isEmpty()) {
                topFile = docPaths.forPackage(packages.first()).resolve(DocPaths.PACKAGE_SUMMARY);
            }
        }
    }

    protected TypeElement getValidClass(List<TypeElement> classes) {
        if (!options.noDeprecated()) {
            return classes.get(0);
        }
        for (TypeElement te : classes) {
            if (!utils.isDeprecated(te)) {
                return te;
            }
        }
        return null;
    }

    protected boolean checkForDeprecation() {
        for (TypeElement te : getIncludedTypeElements()) {
            if (isGeneratedDoc(te)) {
                return true;
            }
        }
        return false;
    }

    
Generate "overview.html" page if option "-overview" is used or number of packages is more than one. Sets HtmlOptions.createOverview field to true. /**
     * Generate "overview.html" page if option "-overview" is used or number of
     * packages is more than one. Sets {@code HtmlOptions.createOverview} field to true.
     */
    protected void setCreateOverview() {
        if (!options.noOverview()) {
            if (options.overviewPath() != null
                    || modules.size() > 1
                    || (modules.isEmpty() && packages.size() > 1)) {
                options.setCreateOverview(true);
            }
        }
    }

    @Override
    public WriterFactory getWriterFactory() {
        return new WriterFactoryImpl(this);
    }

    @Override
    public Locale getLocale() {
        if (locale == null)
            return Locale.getDefault();
        return locale;
    }

    
Return the path of the overview file or null if it does not exist.
Returns:
the path of the overview file or null if it does not exist./**
     * Return the path of the overview file or null if it does not exist.
     *
     * @return the path of the overview file or null if it does not exist.
     */
    @Override
    public JavaFileObject getOverviewPath() {
        String overviewpath = options.overviewPath();
        if (overviewpath != null && getFileManager() instanceof StandardJavaFileManager) {
            StandardJavaFileManager fm = (StandardJavaFileManager) getFileManager();
            return fm.getJavaFileObjects(overviewpath).iterator().next();
        }
        return null;
    }

    public DocPath getMainStylesheet() {
        String stylesheetfile = options.stylesheetFile();
        if(!stylesheetfile.isEmpty()){
            DocFile docFile = DocFile.createFileForInput(this, stylesheetfile);
            return DocPath.create(docFile.getName());
        }
        return  null;
    }

    public List<DocPath> getAdditionalStylesheets() {
        return options.additionalStylesheets().stream()
                .map(ssf -> DocFile.createFileForInput(this, ssf))
                .map(file -> DocPath.create(file.getName()))
                .collect(Collectors.toList());
    }

    @Override
    public JavaFileManager getFileManager() {
        return docEnv.getJavaFileManager();
    }

    @Override
    public boolean showMessage(DocTreePath path, String key) {
        return (path == null || !haveDocLint());
    }

    @Override
    public boolean showMessage(Element e, String key) {
        return (e == null || !haveDocLint());
    }

    @Override
    protected boolean finishOptionSettings0() throws DocletException {
        if (options.docEncoding() == null) {
            if (options.charset() == null) {
                String charset = (options.encoding() == null) ? HTML_DEFAULT_CHARSET : options.encoding();
                options.setCharset(charset);
                options.setDocEncoding((options.charset()));
            } else {
                options.setDocEncoding(options.charset());
            }
        } else {
            if (options.charset() == null) {
                options.setCharset(options.docEncoding());
            } else if (!options.charset().equals(options.docEncoding())) {
                messages.error("doclet.Option_conflict", "-charset", "-docencoding");
                return false;
            }
        }
        return super.finishOptionSettings0();
    }
}