org.w3c.css.properties.css1.CssDisplayCSS1 Maven / Gradle / Ivy
//
// $Id: CssDisplayCSS1.java,v 1.4 2010-01-05 13:49:43 ylafon Exp $
// From Philippe Le Hegaret ([email protected])
//
// (c) COPYRIGHT MIT and INRIA, 1997.
// Please first read the full copyright statement in file COPYRIGHT.html
package org.w3c.css.properties.css1;
import org.w3c.css.properties.css.CssDisplay;
import org.w3c.css.util.ApplContext;
import org.w3c.css.util.InvalidParamException;
import org.w3c.css.values.CssExpression;
import org.w3c.css.values.CssIdent;
import org.w3c.css.values.CssTypes;
import org.w3c.css.values.CssValue;
import java.util.HashMap;
/**
* http://www.w3.org/TR/2008/REC-CSS1-20080411/#display
*
*
* 'display'
*
*
* Value: block | inline | list-item | none
* Initial: block
* Applies to: all elements
* Inherited: no
* Percentage values: N/A
*
* This property describes how/if an element is displayed on the canvas (which
* may be on a printed page, a computer display etc.).
* An element with a 'display' value of 'block' opens a new box. The box
* is positioned relative to adjacent boxes according to the CSS formatting model. Typically, elements like
* 'H1' and 'P' are of type 'block'. A value of 'list-item' is similar to
* 'block' except that a list-item marker is added. In HTML, 'LI' will
* typically have this value.
*
* An element with a 'display' value of 'inline' results in a new inline box
* on the same line as the previous content. The box is dimensioned according
* to the formatted size of the content. If the content is text, it may span
* several lines, and there will be a box on each line. The margin, border and
* padding properties apply to 'inline' elements, but will not have any effect
* at the line breaks.
*
* A value of 'none' turns off the display of the element, including children
* elements and the surrounding box.
*
* P { display: block }
* EM { display: inline }
* LI { display: list-item }
* IMG { display: none }
*
*
* The last rule turns off the display of images.
* The initial value of 'display' is 'block', but a UA will typically have
* default values for all HTML elements according to the suggested rendering
* of elements in the HTML specification.
*
* @version $Revision: 1.4 $
*/
public class CssDisplayCSS1 extends CssDisplay {
CssIdent value;
public static CssIdent block;
public static HashMap allowed_values;
static {
allowed_values = new HashMap();
String[] DISPLAY = {
"block", "inline", "list-item", "none"};
for (String aDISPLAY : DISPLAY) {
allowed_values.put(aDISPLAY, CssIdent.getIdent(aDISPLAY));
}
block = CssIdent.getIdent("block");
}
/**
* Create a new CssDisplay
*/
public CssDisplayCSS1() {
// nothing to do
}
/**
* Create a new CssDisplay
*
* @param ac The context
* @param expression The expression for this property
* @param check boolean, if check has to be enforced
* @throws InvalidParamException Values are incorect
*/
public CssDisplayCSS1(ApplContext ac, CssExpression expression,
boolean check) throws InvalidParamException {
if (check && expression.getCount() > 1) {
throw new InvalidParamException("unrecognize", ac);
}
CssValue val = expression.getValue();
setByUser();
if (val.getType() == CssTypes.CSS_IDENT) {
CssIdent id_val = (CssIdent) val;
String id_value = id_val.toString();
value = allowed_values.get(id_value);
if (value != null) {
expression.next();
return;
}
}
throw new InvalidParamException("value", expression.getValue(),
getPropertyName(), ac);
}
public CssDisplayCSS1(ApplContext ac, CssExpression expression)
throws InvalidParamException {
this(ac, expression, false);
}
/**
* Is the value of this property is a default value.
* It is used by all macro for the function print
*/
public boolean isDefault() {
return (value == block);
}
}