001: /*
002: * This file is part of the Echo Web Application Framework (hereinafter "Echo").
003: * Copyright (C) 2002-2005 NextApp, Inc.
004: *
005: * Version: MPL 1.1/GPL 2.0/LGPL 2.1
006: *
007: * The contents of this file are subject to the Mozilla Public License Version
008: * 1.1 (the "License"); you may not use this file except in compliance with
009: * the License. You may obtain a copy of the License at
010: * http://www.mozilla.org/MPL/
011: *
012: * Software distributed under the License is distributed on an "AS IS" basis,
013: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
014: * for the specific language governing rights and limitations under the
015: * License.
016: *
017: * Alternatively, the contents of this file may be used under the terms of
018: * either the GNU General Public License Version 2 or later (the "GPL"), or
019: * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
020: * in which case the provisions of the GPL or the LGPL are applicable instead
021: * of those above. If you wish to allow use of your version of this file only
022: * under the terms of either the GPL or the LGPL, and not to allow others to
023: * use your version of this file under the terms of the MPL, indicate your
024: * decision by deleting the provisions above and replace them with the notice
025: * and other provisions required by the GPL or the LGPL. If you do not delete
026: * the provisions above, a recipient may use your version of this file under
027: * the terms of any one of the MPL, the GPL or the LGPL.
028: */
029:
030: package nextapp.echo2.webcontainer.propertyrender;
031:
032: import nextapp.echo2.app.Extent;
033: import nextapp.echo2.app.Insets;
034: import nextapp.echo2.webrender.output.CssStyle;
035:
036: /**
037: * Utility class for rendering <code>nextapp.echo2.app.Insets</code>
038: * properties to CSS.
039: */
040: public class InsetsRender {
041:
042: /**
043: * Renders an <code>Insets</code> property to the given CSS style.
044: * Null property values are ignored.
045: *
046: * @param cssStyle the target <code>CssStyle</code>
047: * @param cssAttribute the CSS attribute name, e.g., "margin" or "padding".
048: * @param insets the property value
049: */
050: public static void renderToStyle(CssStyle cssStyle,
051: String cssAttribute, Insets insets) {
052: if (insets == null) {
053: return;
054: }
055: cssStyle.setAttribute(cssAttribute,
056: renderCssAttributeValue(insets));
057: }
058:
059: /**
060: * Renders a CSS attribute value representation of an <code>Insets</code>.
061: *
062: * @param insets the <code>Insets</code> to render
063: * @return a CSS attribute value representation
064: */
065: public static String renderCssAttributeValue(Insets insets) {
066: Extent top = insets.getTop();
067: if (top != null && top.equals(insets.getLeft())
068: && top.equals(insets.getRight())
069: && top.equals(insets.getBottom())) {
070: return ExtentRender.renderCssAttributeValue(top);
071: } else {
072: StringBuffer out = new StringBuffer();
073: if (top == null) {
074: out.append("0px");
075: } else {
076: out.append(ExtentRender.renderCssAttributeValue(top));
077: }
078: out.append(" ");
079: if (insets.getRight() == null) {
080: out.append("0px");
081: } else {
082: out.append(ExtentRender.renderCssAttributeValue(insets
083: .getRight()));
084: }
085: out.append(" ");
086: if (insets.getBottom() == null) {
087: out.append("0px");
088: } else {
089: out.append(ExtentRender.renderCssAttributeValue(insets
090: .getBottom()));
091: }
092: out.append(" ");
093: if (insets.getLeft() == null) {
094: out.append("0px");
095: } else {
096: out.append(ExtentRender.renderCssAttributeValue(insets
097: .getLeft()));
098: }
099: return out.toString();
100: }
101: }
102:
103: /** Non-instantiable class. */
104: private InsetsRender() {
105: }
106: }
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