001/*
002 * flattr4j - A Java library for Flattr
003 *
004 * Copyright (C) 2011 Richard "Shred" Körber
005 *   http://flattr4j.shredzone.org
006 *
007 * This program is free software: you can redistribute it and/or modify
008 * it under the terms of the GNU General Public License / GNU Lesser
009 * General Public License as published by the Free Software Foundation,
010 * either version 3 of the License, or (at your option) any later version.
011 *
012 * Licensed under the Apache License, Version 2.0 (the "License");
013 * you may not use this file except in compliance with the License.
014 *
015 * This program is distributed in the hope that it will be useful,
016 * but WITHOUT ANY WARRANTY; without even the implied warranty of
017 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
018 */
019package org.shredzone.flattr4j.web.tag;
020
021import java.io.IOException;
022
023import javax.servlet.jsp.JspException;
024import javax.servlet.jsp.tagext.BodyTagSupport;
025
026import org.shredzone.flattr4j.model.Category;
027import org.shredzone.flattr4j.model.CategoryId;
028import org.shredzone.flattr4j.model.Language;
029import org.shredzone.flattr4j.model.LanguageId;
030import org.shredzone.flattr4j.model.User;
031import org.shredzone.flattr4j.model.UserId;
032import org.shredzone.flattr4j.web.ButtonType;
033import org.shredzone.flattr4j.web.builder.LoaderBuilder;
034
035/**
036 * A tag that creates the JavaScript loader tag.
037 *
038 * @author Richard "Shred" Körber
039 */
040public class LoaderTag extends BodyTagSupport {
041    private static final long serialVersionUID = -5892160942069969373L;
042
043    private LoaderBuilder builder;
044    private String var;
045    private String scope;
046
047    public void setBare(boolean bare) {
048        setupBuilder();
049        if (bare) builder.bare();
050    }
051
052    public void setManual(boolean manual) {
053        setupBuilder();
054        if (manual) builder.manual();
055    }
056
057    public void setHttps(boolean https) {
058        setupBuilder();
059        if (https) builder.https();
060    }
061
062    public void setPopout(boolean popout) {
063        setupBuilder();
064        builder.popout(popout);
065    }
066
067    public void setUser(Object user) {
068        setupBuilder();
069        if (user instanceof UserId) {
070            builder.user((UserId) user);
071        } else {
072            builder.user(User.withId(user.toString()));
073        }
074    }
075
076    public void setButton(Object type) {
077        setupBuilder();
078        if (type instanceof ButtonType) {
079            builder.button((ButtonType) type);
080        } else {
081            builder.button(ButtonType.valueOf(type.toString().toUpperCase()));
082        }
083    }
084
085    public void setLanguage(Object language) {
086        setupBuilder();
087        if (language instanceof LanguageId) {
088            builder.language((LanguageId) language);
089        } else {
090            builder.language(Language.withId(language.toString()));
091        }
092    }
093
094    public void setCategory(Object category) {
095        setupBuilder();
096        if (category instanceof CategoryId) {
097            builder.category((CategoryId) category);
098        } else {
099            builder.category(Category.withId(category.toString()));
100        }
101    }
102
103    public void setPrefix(String prefix) {
104        setupBuilder();
105        builder.prefix(prefix);
106    }
107
108    public void setVar(String var) {
109        this.var = var;
110    }
111
112    public void setScope(String scope) {
113        this.scope = scope;
114    }
115
116    @Override
117    public int doStartTag() throws JspException {
118        setupBuilder();
119        return EVAL_BODY_INCLUDE;
120    }
121
122    @Override
123    public int doEndTag() throws JspException {
124        String tag = builder.toString();
125
126        if (var != null) {
127            TagUtils.setScopedAttribute(pageContext, var, tag, scope);
128
129        } else {
130            try {
131                pageContext.getOut().print(tag);
132            } catch (IOException ex) {
133                throw new JspException(ex);
134            }
135        }
136
137        disposeBuilder();
138        return EVAL_PAGE;
139    }
140
141    /**
142     * Creates a new builder instance, if not already done.
143     */
144    protected void setupBuilder() {
145        if (builder == null) {
146            builder = new LoaderBuilder();
147        }
148    }
149
150    /**
151     * Disposes the builder instance.
152     */
153    protected void disposeBuilder() {
154        builder = null;
155    }
156
157}