cmspicturebrowser.java

来自「java 编写的程序」· Java 代码 · 共 427 行 · 第 1/2 页

            if(chosenFolder.equals(currFolder.getAbsolutePath())) {
                ret = i;
            }
            values.addElement(currFolder.getAbsolutePath());
            names.addElement(name);
        }
        return new Integer(ret);
    }

    /**
     * Checks, if the given filename matches the filter.
     * @param filename filename to be checked.
     * @param filter filter to be checked.
     * @return <code>true</code> if the filename matches the filter, <code>false</code> otherwise.
     */

    private boolean inFilter(String name, String filter) {
        String compareName = name.toLowerCase();
        String compareFilter = filter.toLowerCase();
        if("".equals(compareFilter) || (compareName.indexOf(compareFilter) != -1)) {
            return true;
        }
        else {
            return false;
        }
    }

    /**
     * Indicates if the results of this class are cacheable.
     *
     * @param cms CmsObject Object for accessing system resources
     * @param templateFile Filename of the template file
     * @param elementName Element name of this template in our parent template.
     * @param parameters Hashtable with all template class parameters.
     * @param templateSelector template section that should be processed.
     * @return <EM>true</EM> if cacheable, <EM>false</EM> otherwise.
     */

    public boolean isCacheable(CmsObject cms, String templateFile, String elementName,
            Hashtable parameters, String templateSelector) {
        return false;
    }

    /**
     * Checks, if the given filename ends with a typical picture suffix.
     * @param filename filename to be checked.
     * @return <code>true</code> if the is an image file, <code>false</code> otherwise.
     */

    private boolean isImage(String filename) {
        if(filename.toLowerCase().endsWith("gif") || filename.toLowerCase().endsWith("jpg")
                || filename.toLowerCase().endsWith("jpeg")) {
            return true;
        }
        else {
            return false;
        }
    }

    /**
     * User method to generate an URL for the pics folder.
     * <P>
     * All pictures should reside in the docroot of the webserver for
     * performance reasons. This folder can be mounted into the OpenCms system to
     * make it accessible for the OpenCms explorer.
     * <P>
     * The path to the docroot can be set in the workplace ini.
     *
     * @param cms CmsObject Object for accessing system resources.
     * @param tagcontent Unused in this special case of a user method. Can be ignored.
     * @param doc Reference to the A_CmsXmlContent object of the initiating XLM document <em>(not used here)</em>.
     * @param userObj Hashtable with parameters <em>(not used here)</em>.
     * @return String with the pics URL.
     * @exception CmsException
     */

    public Object pictureList(CmsObject cms, String tagcontent, A_CmsXmlContent doc,
            Object userObj) throws CmsException {
        I_CmsSession session = cms.getRequestContext().getSession(true);
        Hashtable parameters = (Hashtable)userObj;
        CmsXmlWpTemplateFile xmlTemplateDocument = (CmsXmlWpTemplateFile)doc;
        CmsXmlLanguageFile lang = new CmsXmlLanguageFile(cms);
        StringBuffer result = new StringBuffer();
        String pageText = (String)parameters.get(C_PARA_PAGE);

        // Filter the pics
        Vector filteredPics = (Vector)parameters.get("_PICLIST_");
        int numPics = filteredPics.size();

        // Get limits for the requested page
        int page = new Integer(pageText).intValue();
        int from = (page - 1) * C_PICBROWSER_MAXIMAGES;
        int to = ((from + C_PICBROWSER_MAXIMAGES) > numPics) ? numPics : (from + C_PICBROWSER_MAXIMAGES);
        String folder = (String)parameters.get(C_PARA_FOLDER);
        if(folder == null) {
            folder = (String)session.getValue(C_PARA_FOLDER);
        }
        if(folder == null || "".equals(folder)) {
            folder = getConfigFile(cms).getPicGalleryPath();
            parameters.put(C_PARA_FOLDER, folder);
        }

        //String picsUrl = getConfigFile(cms).getCommonPictureUrl();
        HttpServletRequest req = (HttpServletRequest)(cms.getRequestContext().getRequest().getOriginalRequest());
        String hostName = ""; // no need for host information in editor any more
        String picsUrl = cms.getRequestContext().getRequest().getServletUrl() + folder;

        // Generate the picture list for all pictures on the selected page
        for(int i = from;i < to;i++) {
            CmsFile file = (CmsFile)filteredPics.elementAt(i);
            String filename = file.getName();
            String title = cms.readProperty(file.getAbsolutePath(), C_PROPERTY_TITLE);

            // If no "Title" property is given, the title will be set to the filename
            // without its postfix
            int dotIndex = filename.lastIndexOf(".");
            if(title == null) {
                if(dotIndex > 0) {
                    title = filename.substring(0, dotIndex);
                }
                else {
                    title = filename;
                }
            }

            // The displayed type will be generated from the filename postfix
            String type;
            if(dotIndex > 0) {
                type = filename.substring(filename.lastIndexOf(".") + 1).toUpperCase() + "-Bild";
            }
            else {
                type = lang.getDataValue("input.unknown");
            }


            // Set all datablocks for the current picture list entry
            xmlTemplateDocument.setData("picsource", hostName + picsUrl + file.getName());
            xmlTemplateDocument.setData("filepath", file.getAbsolutePath());
            xmlTemplateDocument.setData("title", title);
            xmlTemplateDocument.setData("filename", filename);
            xmlTemplateDocument.setData("size", file.getLength() + " Byte");
            xmlTemplateDocument.setData("type", type);
            // look if the onclick event must be set
            //String paraSetOnClick = (String)parameters.get("setonclick");
            String paraSetOnClick = (String)session.getValue("picBrowser_for_ext_nav");
            String setOnClick = "";
            if ("true".equals(paraSetOnClick)){
                setOnClick = xmlTemplateDocument.getProcessedDataValue("clickentry");
            }
            xmlTemplateDocument.setData("toclickornot", setOnClick);
            result.append(xmlTemplateDocument.getProcessedDataValue("piclistentry", this, userObj));

            // if this is not the last entry on the current page,
            // append a separator
            if(i < (to - 1)) {
                result.append(xmlTemplateDocument.getProcessedDataValue("part", this, userObj));
            }
        }
        return result.toString();
    }

    /**
     * Used by the workplace "back" button to decide whether the icon should
     * be activated or not. A button will use this method if the attribute <code>method="showBackButton"</code>
     * is defined in the <code>&lt;BUTTON&gt;</code> tag.
     * <P>
     * This method returns <code>false</code> if the currently displayed page is
     * the first page.
     *
     * @param cms CmsObject Object for accessing system resources <em>(not used here)</em>.
     * @param lang reference to the currently valid language file <em>(not used here)</em>.
     * @param parameters Hashtable containing all user parameters <em>(not used here)</em>.
     * @return <code>true</code> if the button should be enabled, <code>false</code> otherwise.
     */

    public Boolean showBackButton(CmsObject cms, CmsXmlLanguageFile lang, Hashtable parameters) {

        // Get the current page number
        String pageText = (String)parameters.get(C_PARA_PAGE);
        int page = new Integer(pageText).intValue();
        return new Boolean(page > 1);
    }

    /**
     * Used by the workplace "next" button to decide whether the icon should
     * be activated or not. A button will use this method if the attribute <code>method="showNextButton"</code>
     * is defined in the <code>&lt;BUTTON&gt;</code> tag.
     * <P>
     * This method returns <code>false</code> if the currently displayed page is
     * the last page.
     *
     * @param cms CmsObject Object for accessing system resources <em>(not used here)</em>.
     * @param lang reference to the currently valid language file <em>(not used here)</em>.
     * @param parameters Hashtable containing all user parameters <em>(not used here)</em>.
     * @return <code>true</code> if the button should be enabled, <code>false</code> otherwise.
     */

    public Boolean showNextButton(CmsObject cms, CmsXmlLanguageFile lang, Hashtable parameters) {

        // Get the current page number
        String pageText = (String)parameters.get(C_PARA_PAGE);
        int page = new Integer(pageText).intValue();

        // get the number of pics
        Vector filteredPics = (Vector)parameters.get("_PICLIST_");
        int numPics = filteredPics.size();

        // Get the maximum page number
        int maxpage = ((numPics - 1) / C_PICBROWSER_MAXIMAGES) + 1;
        return new Boolean(page < maxpage);
    }
}