/*
 * Copyright 2004 The Apache Software Foundation.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.jboss.seam.ui.util;
import java.io.IOException;
import javax.faces.component.UIComponent;
import javax.faces.context.ResponseWriter;
/**
 * Constant declarations for HTML rendering.
 * @author Manfred Geiler
 * @author Anton Koinov
 * @version $Revision: 5294 $ $Date: 2007-06-19 23:57:50 +0200 (Út, 19 VI 2007) $
 */
public final class HTML
{
  
   private static String[] concat(String[]... x)
   {
      int len = 0;
      for (String[] y: x) len+=y.length;
      String[] result = new String[len];
      int i=0;
      for (String[] y: x) 
      {
         for (String s: y)
         {
            result[i++] = s;
         }
      }
      return result;
   }
   /**
    * @return true, if an attribute was written
    * @throws java.io.IOException
    */
   public static boolean renderHTMLAttributes(ResponseWriter writer,
           UIComponent component, String[] attributes) throws IOException {
       boolean somethingDone = false;
       for (int i = 0, len = attributes.length; i < len; i++) {
           String attrName = attributes[i];
           if (renderHTMLAttribute(writer, component, attrName, attrName)) {
               somethingDone = true;
           }
       }
       return somethingDone;
   }
   /**
    * @return true, if the attribute was written
    * @throws java.io.IOException
    */
   public static boolean renderHTMLAttribute(ResponseWriter writer,
           UIComponent component, String componentProperty, String htmlAttrName)
           throws IOException {
       Object value = component.getAttributes().get(componentProperty);
       return renderHTMLAttribute(writer, componentProperty, htmlAttrName,
               value);
   }
   /**
    * @return true, if the attribute was written
    * @throws java.io.IOException
    */
   public static boolean renderHTMLAttribute(ResponseWriter writer,
           String componentProperty, String attrName, Object value)
           throws IOException {
       if (!isDefaultAttributeValue(value)) {
           // render JSF "styleClass" attribute as "class"
           String htmlAttrName = attrName.equals(HTML.STYLE_CLASS_ATTR) ? HTML.CLASS_ATTR
                   : attrName;
           writer.writeAttribute(htmlAttrName, value, componentProperty);
           return true;
       }
       return false;
   }
   /**
    * See JSF Spec. 8.5 Table 8-1
    * @param value
    * @return boolean
    */
   public static boolean isDefaultAttributeValue(Object value)
   {
       if (value == null)
       {
           return true;
       }
       else if (value instanceof Boolean)
       {
           return ((Boolean)value).booleanValue() == false;
       }
       else if (value instanceof Number)
       {
           if (value instanceof Integer)
           {
               return ((Number)value).intValue() == Integer.MIN_VALUE;
           }
           else if (value instanceof Double)
           {
               return ((Number)value).doubleValue() == Double.MIN_VALUE;
           }
           else if (value instanceof Long)
           {
               return ((Number)value).longValue() == Long.MIN_VALUE;
           }
           else if (value instanceof Byte)
           {
               return ((Number)value).byteValue() == Byte.MIN_VALUE;
           }
           else if (value instanceof Float)
           {
               return ((Number)value).floatValue() == Float.MIN_VALUE;
           }
           else if (value instanceof Short)
           {
               return ((Number)value).shortValue() == Short.MIN_VALUE;
           }
       }
       return false;
   }
    private HTML()
    {
        // disable instantiation
    }
    // Common attributes
    public static final String ALIGN_ATTR = "align";
    public static final String DATAFLD_ATTR = "datafld";
    public static final String DATASRC_ATTR = "datasrc";
    public static final String DATAFORMATAS_ATTR = "dataformatas";
    public static final String BORDER_ATTR = "border";
    public static final String WIDTH_ATTR = "width";
    public static final String READONLY_ATTR = "readonly";
    public static final String FILE_ATTR = "file";
    public static final String ACCEPT_ATTR = "accept";
    // Common event handler attributes
    public static final String ONCLICK_ATTR     = "onclick";
    public static final String ONDBLCLICK_ATTR  = "ondblclick";
    public static final String ONMOUSEDOWN_ATTR = "onmousedown";
    public static final String ONMOUSEUP_ATTR   = "onmouseup";
    public static final String ONMOUSEOVER_ATTR = "onmouseover";
    public static final String ONMOUSEMOVE_ATTR = "onmousemove";
    public static final String ONMOUSEOUT_ATTR  = "onmouseout";
    public static final String ONKEYPRESS_ATTR  = "onkeypress";
    public static final String ONKEYDOWN_ATTR   = "onkeydown";
    public static final String ONKEYUP_ATTR     = "onkeyup";
    public static final String[] EVENT_HANDLER_ATTRIBUTES_WITHOUT_ONCLICK =
    {
        ONDBLCLICK_ATTR,
        ONMOUSEDOWN_ATTR,
        ONMOUSEUP_ATTR,
        ONMOUSEOVER_ATTR,
        ONMOUSEMOVE_ATTR,
        ONMOUSEOUT_ATTR,
        ONKEYPRESS_ATTR,
        ONKEYDOWN_ATTR,
        ONKEYUP_ATTR
    };
    public static final String[] EVENT_HANDLER_ATTRIBUTES =
            concat(
                EVENT_HANDLER_ATTRIBUTES_WITHOUT_ONCLICK,
                new String[] {ONCLICK_ATTR});
    // Input field event handler attributes
    public static final String ONFOCUS_ATTR = "onfocus";
    public static final String ONBLUR_ATTR = "onblur";
    public static final String ONSELECT_ATTR = "onselect";
    public static final String ONCHANGE_ATTR = "onchange";
    public static final String[] COMMON_FIELD_EVENT_ATTRIBUTES =
    {
        ONFOCUS_ATTR,
        ONBLUR_ATTR,
        ONSELECT_ATTR,
        ONCHANGE_ATTR
    };
    public static final String[] COMMON_FIELD_EVENT_ATTRIBUTES_WITHOUT_ONFOCUS =
    {
        ONBLUR_ATTR,
        ONSELECT_ATTR,
        ONCHANGE_ATTR
    };
    // universal attributes
    public static final String DIR_ATTR   = "dir";
    public static final String LANG_ATTR  = "lang";
    public static final String STYLE_ATTR = "style";
    public static final String TITLE_ATTR = "title";
    public static final String STYLE_CLASS_ATTR = "styleClass"; //"class" cannot be used as property name
    public static final String[] UNIVERSAL_ATTRIBUTES_WITHOUT_STYLE =
    {
        DIR_ATTR,
        LANG_ATTR,
        TITLE_ATTR,
        //NOTE: if changed, please verify universal attributes in HtmlMessageRenderer !
    };
    public static final String[] UNIVERSAL_ATTRIBUTES =
            concat(
                UNIVERSAL_ATTRIBUTES_WITHOUT_STYLE,
                new String[] {STYLE_ATTR, STYLE_CLASS_ATTR});
    //universal, but not the same property-name -
    //styleClass attribute is rendered as such
    public static final String CLASS_ATTR = "class";
    // common form field attributes
    public static final String ACCESSKEY_ATTR   = "accesskey";
    public static final String TABINDEX_ATTR    = "tabindex";
    public static final String DISABLED_ATTR = "disabled";
    public static final String[] COMMON_FIELD_ATTRIBUTES_WITHOUT_DISABLED =
    {
        ACCESSKEY_ATTR,
        TABINDEX_ATTR
    };
    public static final String[] COMMON_FIELD_ATTRIBUTES =
        concat(
            COMMON_FIELD_ATTRIBUTES_WITHOUT_DISABLED,
            new String[] {DISABLED_ATTR});
    // Common Attributes
    public static final String[] COMMON_PASSTROUGH_ATTRIBUTES =
        concat(
            EVENT_HANDLER_ATTRIBUTES,
            UNIVERSAL_ATTRIBUTES);
    public static final String[] COMMON_PASSTROUGH_ATTRIBUTES_WITHOUT_STYLE =
        concat(
            EVENT_HANDLER_ATTRIBUTES,
            UNIVERSAL_ATTRIBUTES_WITHOUT_STYLE);
    public static final String[] COMMON_PASSTROUGH_ATTRIBUTES_WITHOUT_ONCLICK =
        concat(
            EVENT_HANDLER_ATTRIBUTES_WITHOUT_ONCLICK,
            UNIVERSAL_ATTRIBUTES);
    public static final String[] COMMON_PASSTROUGH_ATTRIBUTES_WITHOUT_ONCLICK_WITHOUT_STYLE =
        concat(
            EVENT_HANDLER_ATTRIBUTES_WITHOUT_ONCLICK,
            UNIVERSAL_ATTRIBUTES_WITHOUT_STYLE);
    public static final String[] COMMON_FIELD_PASSTROUGH_ATTRIBUTES_WITHOUT_DISABLED =
        concat(
            COMMON_PASSTROUGH_ATTRIBUTES,
            COMMON_FIELD_ATTRIBUTES_WITHOUT_DISABLED,
            COMMON_FIELD_EVENT_ATTRIBUTES);
    public static final String[] COMMON_FIELD_PASSTROUGH_ATTRIBUTES_WITHOUT_DISABLED_AND_ONFOCUS =
        concat(
            COMMON_PASSTROUGH_ATTRIBUTES,
            COMMON_FIELD_ATTRIBUTES_WITHOUT_DISABLED,
            COMMON_FIELD_EVENT_ATTRIBUTES_WITHOUT_ONFOCUS);
    public static final String[] COMMON_FIELD_PASSTROUGH_ATTRIBUTES_WITHOUT_DISABLED_AND_ONFOCUS_AND_ONCLICK =
        concat(
            COMMON_PASSTROUGH_ATTRIBUTES_WITHOUT_ONCLICK,
            COMMON_FIELD_ATTRIBUTES_WITHOUT_DISABLED,
            COMMON_FIELD_EVENT_ATTRIBUTES_WITHOUT_ONFOCUS);
    public static final String[] COMMON_FIELD_PASSTROUGH_ATTRIBUTES_WITHOUT_DISABLED_AND_ONCLICK =
        concat(
            COMMON_PASSTROUGH_ATTRIBUTES_WITHOUT_ONCLICK,
            COMMON_FIELD_ATTRIBUTES_WITHOUT_DISABLED,
            COMMON_FIELD_EVENT_ATTRIBUTES);
    // <a>
    public static final String TARGET_ATTR = "target";  //used by <a> and <form>
    public static final String CHARSET_ATTR     = "charset";
    public static final String COORDS_ATTR      = "coords";
    public static final String HREF_ATTR    = "href";
    public static final String HREFLANG_ATTR    = "hreflang";
    public static final String REL_ATTR         = "rel";
    public static final String REV_ATTR         = "rev";
    public static final String SHAPE_ATTR       = "shape";
    public static final String TYPE_ATTR        = "type";
    public static final String[] ANCHOR_ATTRIBUTES =
    {
        ACCESSKEY_ATTR,
        CHARSET_ATTR,
        COORDS_ATTR,
        HREFLANG_ATTR,
        REL_ATTR,
        REV_ATTR,
        SHAPE_ATTR,
        TABINDEX_ATTR,
        TARGET_ATTR,
        TYPE_ATTR
    };
    public static final String[] ANCHOR_PASSTHROUGH_ATTRIBUTES =
        concat(
            ANCHOR_ATTRIBUTES,
            COMMON_PASSTROUGH_ATTRIBUTES);
    public static final String[] ANCHOR_PASSTHROUGH_ATTRIBUTES_WITHOUT_STYLE =
        concat(
            ANCHOR_ATTRIBUTES,
            COMMON_PASSTROUGH_ATTRIBUTES_WITHOUT_STYLE);
    public static final String[] ANCHOR_PASSTHROUGH_ATTRIBUTES_WITHOUT_ONCLICK_WITHOUT_STYLE =
        concat(
            ANCHOR_ATTRIBUTES,
            COMMON_PASSTROUGH_ATTRIBUTES_WITHOUT_ONCLICK_WITHOUT_STYLE);
    // <form>
    public static final String ACCEPT_CHARSET_ATTR = "accept-charset";
    public static final String ENCTYPE_ATTR = "enctype";
    public static final String ONRESET_ATTR = "onreset";
    public static final String ONSUMBIT_ATTR = "onsubmit";
    public static final String[] FORM_ATTRIBUTES =
    {
        ACCEPT_ATTR,
        ACCEPT_CHARSET_ATTR,
        ENCTYPE_ATTR,
        ONRESET_ATTR,
        ONSUMBIT_ATTR,
        TARGET_ATTR,
    };
    public static final String[] FORM_PASSTHROUGH_ATTRIBUTES =
        concat(
            FORM_ATTRIBUTES,
            COMMON_PASSTROUGH_ATTRIBUTES);
    // <img>
    public static final String SRC_ATTR = "src";
    public static final String ALT_ATTR = "alt";
    public static final String HEIGHT_ATTR = "height";
    public static final String HSPACE_ATTR = "hspace";
    public static final String ISMAP_ATTR = "ismap";
    public static final String LONGDESC_ATTR = "longdesc";
    public static final String USEMAP_ATTR = "usemap";
    public static final String VSPACE_ATTR = "vspace";
    public static final String[] IMG_ATTRIBUTES =
    {
        ALIGN_ATTR,
        ALT_ATTR,
        BORDER_ATTR,
        HEIGHT_ATTR,
        HSPACE_ATTR,
        ISMAP_ATTR,
        LONGDESC_ATTR,
        USEMAP_ATTR,
        VSPACE_ATTR,
        WIDTH_ATTR
    };
    public static final String[] IMG_PASSTHROUGH_ATTRIBUTES =
        concat(
           IMG_ATTRIBUTES,
           COMMON_PASSTROUGH_ATTRIBUTES);
    // <input>
    public static final String SIZE_ATTR = "size";
    private static final String AUTOCOMPLETE_ATTR = "autocomplete";
    public static final String CHECKED_ATTR = "checked";
    public static final String MAXLENGTH_ATTR = "maxlength";
    public static final String[] INPUT_ATTRIBUTES = {
        ALIGN_ATTR,
        ALT_ATTR,
        CHECKED_ATTR,
        DATAFLD_ATTR,
        DATASRC_ATTR,
        DATAFORMATAS_ATTR,
        MAXLENGTH_ATTR,
        READONLY_ATTR,
        SIZE_ATTR,
        AUTOCOMPLETE_ATTR
    };
    public static final String[] INPUT_PASSTHROUGH_ATTRIBUTES_WITHOUT_DISABLED =
        concat(
                INPUT_ATTRIBUTES,
                COMMON_FIELD_PASSTROUGH_ATTRIBUTES_WITHOUT_DISABLED);
    public static final String[] INPUT_PASSTHROUGH_ATTRIBUTES_WITHOUT_DISABLED_AND_ONFOCUS_AND_ONCLICK =
        concat(
                INPUT_ATTRIBUTES,
                COMMON_FIELD_PASSTROUGH_ATTRIBUTES_WITHOUT_DISABLED_AND_ONFOCUS_AND_ONCLICK);
    //values for input-type attribute
    public static final String INPUT_TYPE_SUBMIT = "submit";
    public static final String INPUT_TYPE_IMAGE = "image";
    public static final String INPUT_TYPE_HIDDEN = "hidden";
    public static final String INPUT_TYPE_CHECKBOX = "checkbox";
    public static final String INPUT_TYPE_PASSWORD = "password";
    public static final String INPUT_TYPE_TEXT = "text";
    public static final String INPUT_TYPE_RADIO = "radio";
    public static final String INPUT_TYPE_BUTTON = "button";
    // <button>
    public static final String[] BUTTON_ATTRIBUTES =
    {
        ALIGN_ATTR,
        ALT_ATTR,
        DATAFLD_ATTR,
        DATASRC_ATTR,
        DATAFORMATAS_ATTR,
    };
    public static final String[] BUTTON_PASSTHROUGH_ATTRIBUTES_WITHOUT_DISABLED =
        concat(
            BUTTON_ATTRIBUTES,
            COMMON_FIELD_PASSTROUGH_ATTRIBUTES_WITHOUT_DISABLED);
    public static final String[] BUTTON_PASSTHROUGH_ATTRIBUTES_WITHOUT_DISABLED_AND_ONCLICK =
        concat(
            BUTTON_ATTRIBUTES,
            COMMON_FIELD_PASSTROUGH_ATTRIBUTES_WITHOUT_DISABLED_AND_ONCLICK);
    // <iframe>
    public static final String FRAMEBORDER_ATTR = "frameborder";
    public static final String SCROLLING_ATTR = "scrolling";
    // <label>
    public static final String FOR_ATTR = "for";
    public static final String[] LABEL_ATTRIBUTES =
    {
        ACCESSKEY_ATTR,
        ONBLUR_ATTR,
        ONFOCUS_ATTR
        //FOR_ATTR is no pass through !
    };
    public static final String[] LABEL_PASSTHROUGH_ATTRIBUTES =
        concat(
            LABEL_ATTRIBUTES,
            COMMON_PASSTROUGH_ATTRIBUTES);
    // <select>
    public static final String MULTIPLE_ATTR = "multiple";
    public static final String[] SELECT_ATTRIBUTES =
    {
        DATAFLD_ATTR,
        DATASRC_ATTR,
        DATAFORMATAS_ATTR,
    };
    public static final String[] SELECT_PASSTHROUGH_ATTRIBUTES_WITHOUT_DISABLED =
        concat(
            SELECT_ATTRIBUTES,
            COMMON_FIELD_PASSTROUGH_ATTRIBUTES_WITHOUT_DISABLED);
    // <table>
    public static final String BGCOLOR_ATTR = "bgcolor";
    public static final String CELLPADDING_ATTR = "cellpadding";
    public static final String CELLSPACING_ATTR = "cellspacing";
    public static final String FRAME_ATTR = "frame";
    public static final String RULES_ATTR = "rules";
    public static final String SUMMARY_ATTR = "summary";
    public static final String[] TABLE_ATTRIBUTES = {
        ALIGN_ATTR,
        BGCOLOR_ATTR,
        BORDER_ATTR,
        CELLPADDING_ATTR,
        CELLSPACING_ATTR,
        DATAFLD_ATTR,
        DATASRC_ATTR,
        DATAFORMATAS_ATTR,
        FRAME_ATTR,
        RULES_ATTR,
        SUMMARY_ATTR,
        WIDTH_ATTR
    };
    public static final String[] TABLE_PASSTHROUGH_ATTRIBUTES =
        concat(
            TABLE_ATTRIBUTES,
            COMMON_PASSTROUGH_ATTRIBUTES);
    // <textarea>
    public static final String COLS_ATTR = "cols";
    public static final String ROWS_ATTR = "rows";
    public static final String[] TEXTAREA_ATTRIBUTES =
    {
        COLS_ATTR,
        DATAFLD_ATTR,
        DATASRC_ATTR,
        DATAFORMATAS_ATTR,
        READONLY_ATTR,
        ROWS_ATTR,
    };
    public static final String[] TEXTAREA_PASSTHROUGH_ATTRIBUTES_WITHOUT_DISABLED =
        concat(
            TEXTAREA_ATTRIBUTES,
            COMMON_FIELD_PASSTROUGH_ATTRIBUTES_WITHOUT_DISABLED);
    // <input type=file>
    public static final String[] INPUT_FILE_UPLOAD_ATTRIBUTES =
    {
        ACCEPT_ATTR
    };
    public static final String[] INPUT_FILE_PASSTHROUGH_ATTRIBUTES_WITHOUT_DISABLED =
        concat(
            INPUT_FILE_UPLOAD_ATTRIBUTES,
            INPUT_PASSTHROUGH_ATTRIBUTES_WITHOUT_DISABLED);
    /*
    public static final String[] MESSAGE_PASSTHROUGH_ATTRIBUTES =
        concat(
            new String[] {DIR_ATTR, LANG_ATTR, TITLE_ATTR, STYLE_ATTR, STYLE_CLASS_ATTR},
            EVENT_HANDLER_ATTRIBUTES);
            */
    public static final String[] MESSAGE_PASSTHROUGH_ATTRIBUTES_WITHOUT_TITLE_STYLE_AND_STYLE_CLASS =
        concat(
            new String[] {DIR_ATTR, LANG_ATTR},
            EVENT_HANDLER_ATTRIBUTES);
    // selectOne/Many table
    public static final String[] SELECT_TABLE_PASSTHROUGH_ATTRIBUTES =
        new String[] {STYLE_ATTR, STYLE_CLASS_ATTR, BORDER_ATTR};
    public static final String COMPACT_ATTR = "compact";
    public static final String[] UL_ATTRIBUTES = {
        COMPACT_ATTR,
        TYPE_ATTR
    };
    public static final String[] UL_PASSTHROUGH_ATTRIBUTES =
        concat(
            UL_ATTRIBUTES,
            COMMON_PASSTROUGH_ATTRIBUTES);
    //HTML attributes needed for renderding only
    public static final String ID_ATTR = "id";
    public static final String NAME_ATTR = "name";
    public static final String VALUE_ATTR = "value";
    public static final String METHOD_ATTR = "method";
    public static final String ACTION_ATTR = "action";
    public static final String COLSPAN_ATTR = "colspan";
    public static final String SCOPE_ATTR = "scope";
    public static final String LABEL_ATTR = "label";
    public static final String SELECTED_ATTR = "selected";
    //HTML attributes values
    public static final String SCOPE_COLGROUP_VALUE = "colgroup";
    //HTML element constants
    public static final String SPAN_ELEM = "span";
    public static final String DIV_ELEM = "div";
    public static final String INPUT_ELEM = "input";
    public static final String BUTTON_ELEM = "button";
    public static final String SELECT_ELEM = "select";
    public static final String OPTION_ELEM = "option";
    public static final String OPTGROUP_ELEM = "optgroup";
    public static final String TEXTAREA_ELEM = "textarea";
    public static final String FORM_ELEM = "form";
    public static final String ANCHOR_ELEM = "a";
    public static final String H1_ELEM = "h1";
    public static final String H2_ELEM = "h2";
    public static final String H3_ELEM = "h3";
    public static final String H4_ELEM = "h4";
    public static final String H5_ELEM = "h5";
    public static final String H6_ELEM = "h6";
    public static final String IFRAME_ELEM = "iframe";
    public static final String IMG_ELEM = "img";
    public static final String LABEL_ELEM = "label";
    public static final String TABLE_ELEM = "table";
    public static final String TR_ELEM = "tr";
    public static final String TH_ELEM = "th";
    public static final String TD_ELEM = "td";
    public static final String TBODY_ELEM = "tbody";
    public static final String TFOOT_ELEM = "tfoot";
    public static final String THEAD_ELEM = "thead";
    public static final String STYLE_ELEM = "style";
    public static final String SCRIPT_ELEM = "script";
    public static final String SCRIPT_TYPE_ATTR = "type";
    public static final String SCRIPT_TYPE_TEXT_JAVASCRIPT = "text/javascript";
    public static final String SCRIPT_LANGUAGE_ATTR = "language";
    public static final String SCRIPT_LANGUAGE_JAVASCRIPT = "JavaScript";
    public static final String UL_ELEM = "ul";
    public static final String OL_ELEM = "ol";
    public static final String LI_ELEM = "li";
    //HTML simple element constants
    public static final String BR_ELEM = "br";
    //HTML entities
    public static final String NBSP_ENTITY = "&#160;";
    public static final String HREF_PATH_SEPARATOR = "/";
    public static final String HREF_PATH_FROM_PARAM_SEPARATOR = "?";
    public static final String HREF_PARAM_SEPARATOR = "&";
    public static final String HREF_PARAM_NAME_FROM_VALUE_SEPARATOR = "=";
}
