com.bstek.dorado.view.resolver.DefaultSkinResolver.java Source code

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Here is the source code for com.bstek.dorado.view.resolver.DefaultSkinResolver.java

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/*
 * This file is part of Dorado 7.x (http://dorado7.bsdn.org).
 * 
 * Copyright (c) 2002-2012 BSTEK Corp. All rights reserved.
 * 
 * This file is dual-licensed under the AGPLv3 (http://www.gnu.org/licenses/agpl-3.0.html) 
 * and BSDN commercial (http://www.bsdn.org/licenses) licenses.
 * 
 * If you are unsure which license is appropriate for your use, please contact the sales department
 * at http://www.bstek.com/contact.
 */

package com.bstek.dorado.view.resolver;

import java.util.regex.Pattern;

import org.apache.commons.lang.StringUtils;

import com.bstek.dorado.common.ClientType;
import com.bstek.dorado.data.variant.VariantUtils;
import com.bstek.dorado.view.View;
import com.bstek.dorado.web.DoradoContext;
import com.bstek.dorado.web.WebConfigure;

/**
 * @author Benny Bao (mailto:benny.bao@bstek.com)
 * @since 2014-3-2
 */
public class DefaultSkinResolver implements SkinResolver {
    private final static String DEFAULT_SKIN = "default";
    private final static String MSIE = "MSIE";
    private final static String CHROME_FRAME = "chromeframe";
    private final static Pattern MSIE_VERSION_PATTERN = Pattern.compile("^.*?MSIE\\s+(\\d+).*$");

    private SkinSettingManager skinSettingManager;

    public void setSkinSettingManager(SkinSettingManager skinSettingManager) {
        this.skinSettingManager = skinSettingManager;
    }

    protected String doDetermineSkin(DoradoContext context, String skins) throws Exception {
        int currentClientType = VariantUtils.toInt(context.getAttribute(ClientType.CURRENT_CLIENT_TYPE_KEY));
        boolean isIE = false, isIE6 = false, isOldIE = false;
        String ieVersion = null;
        if (currentClientType == 0) {
            String ua = context.getRequest().getHeader("User-Agent");
            if (ua.indexOf(CHROME_FRAME) < 0) {
                isIE = (ua != null && ua.indexOf(MSIE) != -1);
                if (isIE) {
                    ieVersion = MSIE_VERSION_PATTERN.matcher(ua).replaceAll("$1");
                    if (StringUtils.isNotEmpty(ieVersion) && ieVersion.length() == 1) {
                        if ("9".compareTo(ieVersion) > 0) {
                            isOldIE = true;
                            if ("7".compareTo(ieVersion) > 0) {
                                isIE6 = true;
                            }
                        }
                    }
                }
            }
        }

        if (skins != null) {
            skins += (',' + DEFAULT_SKIN);
        } else {
            skins = DEFAULT_SKIN;
        }

        String realSkin = null;
        String[] skinArray = StringUtils.split(skins, ',');
        for (String skin : skinArray) {
            SkinSetting skinSetting;
            if (currentClientType != 0) {
                String tempSkin = skin + '.' + ClientType.toString(currentClientType);

                skinSetting = skinSettingManager.getSkinSetting(context, tempSkin);
                if (skinSetting != null) {
                    if (ClientType.supports(skinSetting.getClientTypes(), currentClientType)) {
                        realSkin = tempSkin;
                        break;
                    }
                }
            }

            if (isIE6) {
                String tempSkin = skin + ".ie6";

                skinSetting = skinSettingManager.getSkinSetting(context, tempSkin);
                if (skinSetting != null) {
                    String skinUserAgent = skinSetting.getUserAgent();
                    if (StringUtils.isEmpty(skinUserAgent) || skinUserAgent.indexOf("-ie") < 0) {
                        realSkin = tempSkin;
                        break;
                    }
                }
            }

            skinSetting = skinSettingManager.getSkinSetting(context, skin);
            if (skinSetting != null) {
                if (currentClientType != 0) {
                    if (!ClientType.supports(skinSetting.getClientTypes(), currentClientType)) {
                        break;
                    }
                }
                if (isOldIE) {
                    String skinUserAgent = skinSetting.getUserAgent();
                    if (StringUtils.isNotEmpty(skinUserAgent)) {
                        int i = skinUserAgent.indexOf("-ie");
                        if (i >= 0) {
                            i += 3;
                            String version = "";
                            int len = skinUserAgent.length();
                            while (i < len) {
                                char c = skinUserAgent.charAt(i);
                                i++;
                                if (c >= '0' && c <= '9' || c == '.') {
                                    version += c;
                                } else {
                                    break;
                                }
                            }

                            if (ieVersion.compareTo(version) <= 0) {
                                continue;
                            }
                        }
                    }
                }
                realSkin = skin;
                break;
            }
        }

        if (realSkin == null) {
            realSkin = DEFAULT_SKIN;
            if (isOldIE) {
                realSkin += ".ie6";
            } else if (currentClientType > ClientType.DESKTOP) {
                realSkin += '.' + ClientType.toString(currentClientType);
            }
        }
        return realSkin;
    }

    public String determineSkin(DoradoContext context, View view) throws Exception {
        String skins = view.getSkin();
        if (StringUtils.isEmpty(skins)) {
            skins = WebConfigure.getString("view.skin");
        }
        return doDetermineSkin(context, skins);
    }

}