01: /*
02: * This file is part of the Echo Web Application Framework (hereinafter "Echo").
03: * Copyright (C) 2002-2005 NextApp, Inc.
04: *
05: * Version: MPL 1.1/GPL 2.0/LGPL 2.1
06: *
07: * The contents of this file are subject to the Mozilla Public License Version
08: * 1.1 (the "License"); you may not use this file except in compliance with
09: * the License. You may obtain a copy of the License at
10: * http://www.mozilla.org/MPL/
11: *
12: * Software distributed under the License is distributed on an "AS IS" basis,
13: * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
14: * for the specific language governing rights and limitations under the
15: * License.
16: *
17: * Alternatively, the contents of this file may be used under the terms of
18: * either the GNU General Public License Version 2 or later (the "GPL"), or
19: * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
20: * in which case the provisions of the GPL or the LGPL are applicable instead
21: * of those above. If you wish to allow use of your version of this file only
22: * under the terms of either the GPL or the LGPL, and not to allow others to
23: * use your version of this file under the terms of the MPL, indicate your
24: * decision by deleting the provisions above and replace them with the notice
25: * and other provisions required by the GPL or the LGPL. If you do not delete
26: * the provisions above, a recipient may use your version of this file under
27: * the terms of any one of the MPL, the GPL or the LGPL.
28: */
29:
30: package nextapp.echo2.webcontainer.propertyrender;
31:
32: import java.util.Locale;
33:
34: import nextapp.echo2.app.LayoutDirection;
35: import nextapp.echo2.webrender.output.CssStyle;
36:
37: /**
38: * Utility class for rendering
39: * <code>nextapp.echo2.app.LayoutDirection</code> properties.
40: */
41: public class LayoutDirectionRender {
42:
43: /**
44: * Renders a CSS attribute value representation of a
45: * <code>LayoutDirection</code>.
46: *
47: * @param layoutDirection the <code>LayoutDirection</code> to render
48: * @return a CSS attribute value representation
49: */
50: public static String renderCssAttributeValue(
51: LayoutDirection layoutDirection) {
52: return layoutDirection.isLeftToRight() ? "ltr" : "rtl";
53: }
54:
55: /**
56: * Renders the layout direction of a component to the given CSS style,
57: * based on the provided <code>LayoutDirection</code> and
58: * <code>Locale</code> property values. Null property values are ignored.
59: * <p>
60: * The provided <code>locale</code> and <code>layoutDirection</code>
61: * properties should represent the specific settings of a single
62: * <code>Component</code>, NOT those derived recursively from within its
63: * hierarchy. Using the recursively retrieved versions will result in
64: * direction information being rendered in cases where it is unnecessary.
65: *
66: * @param cssStyle the target <code>CssStyle</code>
67: * @param layoutDirection the <code>LayoutDirection</code>
68: * @param locale the <code>Locale</code>
69: */
70: public static void renderToStyle(CssStyle cssStyle,
71: LayoutDirection layoutDirection, Locale locale) {
72: if (layoutDirection == null) {
73: if (locale == null) {
74: return;
75: }
76: layoutDirection = LayoutDirection.forLocale(locale);
77: }
78: cssStyle.setAttribute("direction",
79: renderCssAttributeValue(layoutDirection));
80: }
81:
82: /** Non-instantiable class. */
83: private LayoutDirectionRender() {
84: }
85: }
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