Source Code Cross Referenced for ElementLabelImpl.java in  » Ajax » ItsNat » org » itsnat » impl » core » domutil » Java Source Code / Java DocumentationJava Source Code and Java Documentation

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Java Source Code / Java Documentation » Ajax » ItsNat » org.itsnat.impl.core.domutil 
Source Cross Referenced  Class Diagram Java Document (Java Doc) 


001:        /*
002:          ItsNat Java Web Application Framework
003:          Copyright (C) 2007 Innowhere Software Services S.L., Spanish Company
004:          Author: Jose Maria Arranz Santamaria
005:
006:          This program is free software: you can redistribute it and/or modify
007:          it under the terms of the GNU Affero General Public License as published by
008:          the Free Software Foundation, either version 3 of the License, or
009:          (at your option) any later version. See the GNU Affero General Public 
010:          License for more details. See the copy of the GNU Affero General Public License
011:          included in this program. If not, see <http://www.gnu.org/licenses/>.
012:         */
013:
014:        package org.itsnat.impl.core.domutil;
015:
016:        import org.itsnat.core.ItsNatException;
017:        import org.itsnat.core.domutil.ElementLabel;
018:        import org.itsnat.core.domutil.ElementLabelRenderer;
019:        import org.itsnat.core.domutil.ItsNatDOMUtil;
020:        import org.itsnat.impl.core.ItsNatDocumentImpl;
021:        import org.w3c.dom.DocumentFragment;
022:        import org.w3c.dom.Element;
023:
024:        /**
025:         *
026:         * @author jmarranz
027:         */
028:        public class ElementLabelImpl extends ElementGroupImpl implements 
029:                ElementLabel {
030:            protected Element parentElement;
031:            protected ElementLabelRenderer renderer;
032:            protected DocumentFragment contentPatternFragment; // Será recordado como patrón, nunca es null pero puede estar vacío
033:            protected boolean usePatternMarkupToRender;
034:            protected boolean hasLabel = false;
035:
036:            /** Creates a new instance of ElementLabelImpl */
037:            public ElementLabelImpl(ItsNatDocumentImpl itsNatDoc,
038:                    Element parentElement, boolean removePattern,
039:                    ElementLabelRenderer renderer) {
040:                super (itsNatDoc);
041:
042:                this .parentElement = parentElement;
043:                this .renderer = renderer;
044:                this .usePatternMarkupToRender = itsNatDoc
045:                        .isUsePatternMarkupToRender();
046:
047:                if (removePattern) {
048:                    this .contentPatternFragment = ItsNatDOMUtilInternal
049:                            .extractChildrenToDocFragment(parentElement);
050:                    // Hasta que no se defina un value explícitamente el label está vacío            
051:                } else {
052:                    Element clonedParentElem = (Element) parentElement
053:                            .cloneNode(true);
054:                    this .contentPatternFragment = ItsNatDOMUtilInternal
055:                            .extractChildrenToDocFragment(clonedParentElem);
056:                    this .hasLabel = true; // De esta manera evitamos que se use el patrón para llenar el contenido la primera vez, pues el contenido original ya está ahí
057:                    // El contenido original queda como está, el patrón está clonado del original
058:                    // y se usará si usePatternMarkupToRender es true
059:                }
060:            }
061:
062:            public Element getParentElement() {
063:                return parentElement;
064:            }
065:
066:            public ElementLabelRenderer getElementLabelRenderer() {
067:                return renderer;
068:            }
069:
070:            public void setElementLabelRenderer(ElementLabelRenderer renderer) {
071:                this .renderer = renderer;
072:            }
073:
074:            public DocumentFragment getContentPatternFragment() {
075:                return contentPatternFragment;
076:            }
077:
078:            public boolean hasLabelMarkup() {
079:                return hasLabel;
080:            }
081:
082:            public void setLabelValue(Object value) {
083:                if (!hasLabel) {
084:                    // Definido por vez primera explícitamente, en este caso
085:                    // inicialmente el contenido del label está vacío, lo llenamos con el pattern            
086:                    addLabelMarkup(value);
087:                } else {
088:                    setElementValue(value, false);
089:                }
090:            }
091:
092:            public void setElementValue(Object value, boolean isNew) {
093:                prepareRendering(isNew);
094:
095:                Element parent = getParentElement();
096:                ElementLabelRenderer renderer = getElementLabelRenderer();
097:                if (renderer != null)
098:                    renderer.renderLabel(this , value, parent, isNew);
099:            }
100:
101:            public void addLabelMarkup() {
102:                if (hasLabel)
103:                    throw new ItsNatException("Label already has markup");
104:
105:                Element parent = getParentElement();
106:                parent.appendChild(contentPatternFragment.cloneNode(true));
107:                this .hasLabel = true;
108:            }
109:
110:            public void addLabelMarkup(Object value) {
111:                addLabelMarkup();
112:                setElementValue(value, true);
113:            }
114:
115:            public void removeLabelMarkup() {
116:                Element parent = getParentElement();
117:                ElementLabelRenderer renderer = getElementLabelRenderer();
118:                if (renderer != null) // If null rendering disabled     
119:                    renderer.unrenderLabel(this , parent);
120:
121:                ItsNatDOMUtil.removeAllChildren(parent); // Si está ya vacío no hace nada obviamente
122:                this .hasLabel = false;
123:            }
124:
125:            public void prepareRendering(boolean isNew) {
126:                if (!isNew && isUsePatternMarkupToRender()) {
127:                    // Es una actualización en donde tenemos que usar el markup pattern en vez del contenido actual
128:                    Element parent = getParentElement();
129:                    restorePatternMarkupWhenRendering(parent,
130:                            getContentPatternFragment());
131:                }
132:            }
133:
134:            public boolean isUsePatternMarkupToRender() {
135:                return usePatternMarkupToRender;
136:            }
137:
138:            public void setUsePatternMarkupToRender(
139:                    boolean usePatternMarkupToRender) {
140:                this.usePatternMarkupToRender = usePatternMarkupToRender;
141:            }
142:        }
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