com.edgenius.wiki.render.macro.AlignMacro.java Source code

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Here is the source code for com.edgenius.wiki.render.macro.AlignMacro.java

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/* 
 * =============================================================
 * Copyright (C) 2007-2011 Edgenius (http://www.edgenius.com)
 * =============================================================
 * License Information: http://www.edgenius.com/licensing/edgenius/2.0/
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2.0
 * as published by the Free Software Foundation.
 *
 * This program 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 for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 *
 * http://www.gnu.org/licenses/gpl.txt
 *  
 * ****************************************************************
 */
package com.edgenius.wiki.render.macro;

import java.util.ListIterator;

import org.apache.commons.lang.StringUtils;

import com.edgenius.wiki.gwt.client.html.HTMLNode;
import com.edgenius.wiki.gwt.client.server.utils.EscapeUtil;
import com.edgenius.wiki.gwt.client.server.utils.NameConstants;
import com.edgenius.wiki.gwt.client.server.utils.StringUtil;
import com.edgenius.wiki.render.MacroParameter;
import com.edgenius.wiki.render.MalformedMacroException;
import com.edgenius.wiki.render.RenderContext;
import com.edgenius.wiki.render.RenderUtil;

/**
 * @author Dapeng.Ni
 */
public class AlignMacro extends BaseMacro {

    //JDK1.6 @Override
    public String[] getName() {
        return new String[] { "align" };
    }

    //JDK1.6 @Override
    public boolean isPaired() {
        return true;
    }

    @Override
    public String getHTMLIdentifier() {
        return "<* style=\"text-align: *;\">";
    }

    @Override
    protected void replaceHTML(HTMLNode node, ListIterator<HTMLNode> iter, RenderContext context) {
        if (node.getPair() == null) {
            log.warn("Unexpect case: No close tag for " + this.getClass().getName());
            return;
        }
        if (node.getStyle() != null && node.getStyle().get(NameConstants.TEXT_ALIGN) != null
                && (node.getAttributes() == null
                        || StringUtils.isBlank(node.getAttributes().get(NameConstants.AID)))) {
            String align = node.getStyle().get(NameConstants.TEXT_ALIGN);
            HTMLNode alignNode = null;

            //what ever the NODE is, such as <td style="align:center;colspan=4"> etc, the align attribute need be remove
            node.removeStyle("text-align", null);
            if ("div".equalsIgnoreCase(node.getTagName()) || "span".equalsIgnoreCase(node.getTagName())
                    || "p".equalsIgnoreCase(node.getTagName())) {
                alignNode = node;
            } else {
                //maybe <td> tag,  it can not be simply reset -- otherwise, table will lost one cell.So here will add a paired <span> node
                //!!! don't insert <div> pair as it may broken TableMacro.isSimpleTableSupport()
                //enclose by current node 
                //?? need handle default left?
                if ("center".equalsIgnoreCase(align) || "right".equalsIgnoreCase(align)) {
                    //build a proxy tag, their tagname does not matter as it will reset following code
                    alignNode = new HTMLNode("<span>", false);
                    HTMLNode closeAlignNode = new HTMLNode("</span>", false);
                    alignNode.setPair(closeAlignNode);

                    iter.add(alignNode);

                    //example, go to </td> tag 
                    moveIteratorCursorTo(node.getPair(), iter, true);
                    //this is that node before </td>, need confirm it is not <td> (basically, it is impossible a <div> insert after <td>) 
                    HTMLNode nd = iter.previous();
                    if (nd != node) {
                        iter.add(closeAlignNode);
                        //move iterator back to node
                        moveIteratorCursorTo(node, iter, false);
                    }
                }
            }

            if (alignNode != null) {
                if ("center".equalsIgnoreCase(align)) {
                    alignNode.reset("{align:align=center}", true);
                    alignNode.getPair().reset("{align}", true);

                } else if ("right".equalsIgnoreCase(align)) {
                    alignNode.reset("{align:align=right}", true);
                    alignNode.getPair().reset("{align}", true);
                }
            }
        }

    }

    //JDK1.6 @Override
    public void execute(StringBuffer buffer, MacroParameter params) throws MalformedMacroException {
        String align = params.getParam(NameConstants.ALIGN);
        if (StringUtil.isBlank(align)
                || !StringUtil.containsIgnoreCase(new String[] { "center", "centre", "left", "right" }, align)) {
            buffer.append(RenderUtil.renderError("Please set " + EscapeUtil.toEntity('[') + "center|left|right "
                    + EscapeUtil.toEntity(']') + " on align attributes.", params.getStartMarkup()));
            //keep original text
            buffer.append(params.getContent());
            buffer.append("{align}");
            return;
        }

        //"centre" is only for typo in British English
        if ("center".equalsIgnoreCase(align) || "centre".equalsIgnoreCase(align)) {
            buffer.append("<p style=\"text-align: center;\">");
            buffer.append(params.getContent());
            buffer.append("</p>");
        } else if ("left".equalsIgnoreCase(align)) {
            buffer.append("<div style=\"text-align: left;\">");
            buffer.append(params.getContent());
            buffer.append("</div>");
        } else if ("right".equalsIgnoreCase(align)) {
            buffer.append("<div style=\"text-align: right;\">");
            buffer.append(params.getContent());
            buffer.append("</div>");
        }

    }

}