Examples of org.htmlparser.Attribute

org.htmlparser.Attribute
3.org/TR/html4/intro/sgmltut.html#h-3.2.2"> HTML 4.01 Specification, W3C Recommendation 24 December 1999 http://www.w3.org/TR/html4/intro/sgmltut.html#h-3.2.2:
3.2.2 Attributes
Elements may have associated properties, called attributes, which may have values (by default, or set by authors or scripts). Attribute/value pairs appear before the final ">" of an element's start tag. Any number of (legal) attribute value pairs, separated by spaces, may appear in an element's start tag. They may appear in any order.
In this example, the id attribute is set for an H1 element:
```
  {@.html  This is an identified heading thanks to the id attribute 
} 
```
By default, SGML requires that all attribute values be delimited using either double quotation marks (ASCII decimal 34) or single quotation marks (ASCII decimal 39). Single quote marks can be included within the attribute value when the value is delimited by double quote marks, and vice versa. Authors may also use numeric character references to represent double quotes (") and single quotes ('). For doublequotes authors can also use the character entity reference ".
In certain cases, authors may specify the value of an attribute without any quotation marks. The attribute value may only contain letters (a-z and A-Z), digits (0-9), hyphens (ASCII decimal 45), periods (ASCII decimal 46), underscores (ASCII decimal 95), and colons (ASCII decimal 58). We recommend using quotation marks even when it is possible to eliminate them.
Attribute names are always case-insensitive.
Attribute values are generally case-insensitive. The definition of each attribute in the reference manual indicates whether its value is case-insensitive.
All the attributes defined by this specification are listed in the attribute index.

     * @return The value associated with the attribute or null if it does
     * not exist, or is a stand-alone or
     */
    public String getAttribute (String name)
    {
        Attribute attribute;
        String ret;


        ret = null;


        attribute = getAttributeEx (name);
        if (null != attribute)
            ret = attribute.getValue ();


        return (ret);
    }

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        boolean singleq;
        boolean doubleq;
        String ref;
        StringBuffer buffer;
        char quote;
        Attribute attribute;


        // first determine if there's whitespace in the value
        // and while we'return at it find a suitable quote character
        needed = false;
        singleq = true;
        doubleq = true;
        if (null != value)
            for (int i = 0; i < value.length (); i++)
            {
                ch = value.charAt (i);
                if (Character.isWhitespace (ch))
                    needed = true;
                else if ('\'' == ch)
                    singleq  = false;
                else if ('"' == ch)
                    doubleq = false;
            }


        // now apply quoting
        if (needed)
        {
            if (doubleq)
                quote = '"';
            else if (singleq)
                quote = '\'';
            else
            {
                // uh-oh, we need to convert some quotes into character references
                // convert all double quotes into &#34;
                quote = '"';
                ref = "&quot;"; // Translate.encode (quote);
                // JDK 1.4: value = value.replaceAll ("\"", ref);
                buffer = new StringBuffer (value.length() * 5);
                for (int i = 0; i < value.length (); i++)
                {
                    ch = value.charAt (i);
                    if (quote == ch)
                        buffer.append (ref);
                    else
                        buffer.append (ch);
                }
                value = buffer.toString ();
            }
        }
        else
            quote = 0;
        attribute = getAttributeEx (key);
        if (null != attribute)
        {   // see if we can splice it in rather than replace it
            attribute.setValue (value);
            if (0 != quote)
                attribute.setQuote (quote);
        }
        else
            setAttribute (key, value, quote);
    }

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     * Remove the attribute with the given key, if it exists.
     * @param key The name of the attribute.
     */
    public void removeAttribute (String key)
    {
        Attribute attribute;


        attribute = getAttributeEx (key);
        if (null != attribute)
            getAttributesEx ().remove (attribute);
    }

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     * @param quote The quote character to be used around value.
     * If zero, it is an unquoted value.
     */
    public void setAttribute (String key, String value, char quote)
    {
        setAttribute (new Attribute (key, value, quote));
    }

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     */
    public Attribute getAttributeEx (String name)
    {
        Vector attributes;
        int size;
        Attribute attribute;
        String string;
        Attribute ret;


        ret = null;


        attributes = getAttributesEx ();
        if (null != attributes)

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    {
        boolean replaced;
        Vector attributes;
        int length;
        String name;
        Attribute test;
        String test_name;


        replaced = false;
        attributes = getAttributesEx ();
        length =  attributes.size ();
        if (0 < length)
        {
            name = attribute.getName ();
            for (int i = 1; i < attributes.size (); i++)
            {
                test = (Attribute)attributes.elementAt (i);
                test_name = test.getName ();
                if (null != test_name)
                    if (test_name.equalsIgnoreCase (name))
                    {
                        attributes.setElementAt (attribute, i);
                        replaced = true;
                    }
            }
        }
        if (!replaced)
        {
            // add whitespace between attributes
            if ((0 != length) && !((Attribute)attributes.elementAt (length - 1)).isWhitespace ())
                attributes.addElement (new Attribute (" "));
            attributes.addElement (attribute);
        }
    }

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     * zeroth element of the attribute vector).
     * @param name The tag name.
     */
    public void setTagName (String name)
    {
        Attribute attribute;
        Vector attributes;
        Attribute zeroth;


        attribute = new Attribute (name, null, (char)0);
        attributes = getAttributesEx ();
        if (null == attributes)
        {
            attributes = new Vector ();
            setAttributesEx (attributes);
        }
        if (0 == attributes.size ())
            // nothing added yet
            attributes.addElement (attribute);
        else
        {
            zeroth = (Attribute)attributes.elementAt (0);
            // check for attribute that looks like a name
            if ((null == zeroth.getValue ()) && (0 == zeroth.getQuote ()))
                attributes.setElementAt (attribute, 0);
            else
                attributes.insertElementAt (attribute, 0);
        }
    }

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    public String toHtml (boolean verbatim)
    {
        int length;
        int size;
        Vector attributes;
        Attribute attribute;
        StringBuffer ret;


        length = 2;
        attributes = getAttributesEx ();
        size = attributes.size ();
        for (int i = 0; i < size; i++)
        {
            attribute = (Attribute)attributes.elementAt (i);
            length += attribute.getLength ();
        }
        ret = new StringBuffer (length);
        ret.append ("<");
        for (int i = 0; i < size; i++)
        {
            attribute = (Attribute)attributes.elementAt (i);
            attribute.toString (ret);
        }
        ret.append (">");


        return (ret.toString ());
    }

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     */
    public boolean isEmptyXmlTag ()
    {
        Vector attributes;
        int size;
        Attribute attribute;
        String name;
        int length;
        boolean ret;


        ret = false;


        attributes = getAttributesEx ();
        size = attributes.size ();
        if (0 < size)
        {
            attribute = (Attribute)attributes.elementAt (size - 1);
            name = attribute.getName ();
            if (null != name)
            {
                length = name.length ();
                ret = name.charAt (length - 1) == '/';
            }

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     */
    public void setEmptyXmlTag (boolean emptyXmlTag)
    {
        Vector attributes;
        int size;
        Attribute attribute;
        String name;
        String value;
        int length;
        
        attributes = getAttributesEx ();
        size = attributes.size ();
        if (0 < size)
        {
            attribute = (Attribute)attributes.elementAt (size - 1);
            name = attribute.getName ();
            if (null != name)
            {
                length = name.length ();
                value = attribute.getValue ();
                if (null == value)
                    if (name.charAt (length - 1) == '/')
                    {
                        // already exists, remove if requested
                        if (!emptyXmlTag)
                            if (1 == length)
                                attributes.removeElementAt (size - 1);
                            else
                            {
                                // this shouldn't happen, but covers the case
                                // where no whitespace separates the slash
                                // from the previous attribute
                                name = name.substring (0, length - 1);
                                attribute = new Attribute (name, null);
                                attributes.removeElementAt (size - 1);
                                attributes.addElement (attribute);
                            }
                    }
                    else
                    {
                        // ends with attribute, add whitespace + slash if requested
                        if (emptyXmlTag)
                        {
                            attribute = new Attribute (" ");
                            attributes.addElement (attribute);
                            attribute = new Attribute ("/", null);
                            attributes.addElement (attribute);
                        }
                    }
                else
                {
                    // some valued attribute, add whitespace + slash if requested
                    if (emptyXmlTag)
                    {
                        attribute = new Attribute (" ");
                        attributes.addElement (attribute);
                        attribute = new Attribute ("/", null);
                        attributes.addElement (attribute);
                    }
                }
            }
            else
            {
                // ends with whitespace, add if requested
                if (emptyXmlTag)
                {
                    attribute = new Attribute ("/", null);
                    attributes.addElement (attribute);
                }
            }
        }
        else
            // nothing there, add if requested
            if (emptyXmlTag)
            {
                attribute = new Attribute ("/", null);
                attributes.addElement (attribute);
            }
    }

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Examples of org.htmlparser.Attribute

This is an identified heading thanks to the id attribute

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