com.liferay.taglib.aui.ScriptTag.java Source code

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Here is the source code for com.liferay.taglib.aui.ScriptTag.java

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/**
 * Copyright (c) 2000-2012 Liferay, Inc. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or modify it under
 * the terms of the GNU Lesser General Public License as published by the Free
 * Software Foundation; either version 2.1 of the License, or (at your option)
 * any later version.
 *
 * This library 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 Lesser General Public License for more
 * details.
 */

package com.liferay.taglib.aui;

import com.liferay.portal.kernel.servlet.BodyContentWrapper;
import com.liferay.portal.kernel.servlet.BrowserSnifferUtil;
import com.liferay.portal.kernel.servlet.PortalIncludeUtil;
import com.liferay.portal.kernel.servlet.taglib.FileAvailabilityUtil;
import com.liferay.portal.kernel.servlet.taglib.aui.ScriptData;
import com.liferay.portal.kernel.util.ServerDetector;
import com.liferay.portal.kernel.util.StringBundler;
import com.liferay.portal.kernel.util.StringPool;
import com.liferay.portal.kernel.util.WebKeys;
import com.liferay.taglib.aui.base.BaseScriptTag;

import java.util.Set;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.JspException;
import javax.servlet.jsp.JspWriter;
import javax.servlet.jsp.PageContext;
import javax.servlet.jsp.tagext.BodyContent;

/**
 * @author Brian Wing Shun Chan
 * @author Shuyang Zhou
 */
public class ScriptTag extends BaseScriptTag {

    public static void doTag(String position, String use, String bodyContentString, BodyContent previousBodyContent,
            PageContext pageContext) throws Exception {

        String previousBodyContentString = null;

        if ((previousBodyContent != null) && !(previousBodyContent instanceof BodyContentWrapper)) {

            // LPS-22413

            previousBodyContentString = previousBodyContent.getString();
        }

        ScriptTag scriptTag = new ScriptTag();

        scriptTag.setPageContext(pageContext);
        scriptTag.setPosition(position);
        scriptTag.setUse(use);

        BodyContent bodyContent = pageContext.pushBody();

        scriptTag.setBodyContent(bodyContent);

        bodyContent.write(bodyContentString);

        pageContext.popBody();

        scriptTag.doEndTag();

        scriptTag.release();

        if (previousBodyContentString != null) {

            // LPS-22413

            previousBodyContent.clear();

            previousBodyContent.append(previousBodyContentString);
        }
    }

    public static void flushScriptData(PageContext pageContext) throws Exception {

        HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();

        ScriptData scriptData = (ScriptData) request.getAttribute(ScriptTag.class.getName());

        if (scriptData == null) {
            scriptData = (ScriptData) request.getAttribute(WebKeys.AUI_SCRIPT_DATA);

            if (scriptData != null) {
                request.removeAttribute(WebKeys.AUI_SCRIPT_DATA);
            }
        }

        if (scriptData != null) {
            ScriptTag scriptTag = new ScriptTag();

            scriptTag.setPageContext(pageContext);

            scriptTag.processEndTag(scriptData);
        }
    }

    @Override
    protected void cleanUp() {
        setPosition(null);
        setUse(null);
    }

    @Override
    public int doEndTag() throws JspException {
        HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();

        boolean positionInline = isPositionInLine();

        try {
            StringBundler bodyContentSB = getBodyContentAsStringBundler();

            String use = getUse();

            if (positionInline) {
                ScriptData scriptData = new ScriptData();

                request.setAttribute(ScriptTag.class.getName(), scriptData);

                scriptData.append(bodyContentSB, use);

                String page = getPage();

                if (FileAvailabilityUtil.isAvailable(pageContext.getServletContext(), page)) {

                    PortalIncludeUtil.include(pageContext, page);
                } else {
                    processEndTag(scriptData);
                }
            } else {
                ScriptData scriptData = (ScriptData) request.getAttribute(WebKeys.AUI_SCRIPT_DATA);

                if (scriptData == null) {
                    scriptData = new ScriptData();

                    request.setAttribute(WebKeys.AUI_SCRIPT_DATA, scriptData);
                }

                scriptData.append(bodyContentSB, use);
            }

            return EVAL_PAGE;
        } catch (Exception e) {
            throw new JspException(e);
        } finally {
            if (positionInline) {
                request.removeAttribute(ScriptTag.class.getName());
            }

            if (!ServerDetector.isResin()) {
                cleanUp();
            }
        }
    }

    protected void processEndTag(ScriptData scriptData) throws Exception {
        JspWriter jspWriter = pageContext.getOut();

        jspWriter.write("<script type=\"text/javascript\">\n// <![CDATA[\n");

        StringBundler rawSB = scriptData.getRawSB();

        rawSB.writeTo(jspWriter);

        StringBundler callbackSB = scriptData.getCallbackSB();

        if (callbackSB.index() > 0) {
            String loadMethod = "use";

            HttpServletRequest request = (HttpServletRequest) pageContext.getRequest();

            if (BrowserSnifferUtil.isIe(request) && (BrowserSnifferUtil.getMajorVersion(request) < 8)) {

                loadMethod = "ready";
            }

            jspWriter.write("AUI().");
            jspWriter.write(loadMethod);
            jspWriter.write("(");

            Set<String> useSet = scriptData.getUseSet();

            for (String use : useSet) {
                jspWriter.write(StringPool.APOSTROPHE);
                jspWriter.write(use);
                jspWriter.write(StringPool.APOSTROPHE);
                jspWriter.write(StringPool.COMMA_AND_SPACE);
            }

            jspWriter.write("function(A) {");

            callbackSB.writeTo(jspWriter);

            jspWriter.write("});");
        }

        jspWriter.write("\n// ]]>\n</script>");
    }

}