| /* |
| * Copyright (C) 2007 The Android Open Source Project |
| * |
| * Licensed under the Eclipse Public License, Version 1.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.eclipse.org/org/documents/epl-v10.php |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| |
| package com.android.ide.eclipse.adt.internal.editors.uimodel; |
| |
| import com.android.ide.eclipse.adt.internal.editors.descriptors.TextValueDescriptor; |
| |
| import org.w3c.dom.Document; |
| import org.w3c.dom.Node; |
| import org.w3c.dom.Text; |
| |
| /** |
| * Represents an XML element value in that can be modified using a simple text field |
| * in the XML editor's user interface. |
| */ |
| public class UiTextValueNode extends UiTextAttributeNode { |
| |
| public UiTextValueNode(TextValueDescriptor attributeDescriptor, UiElementNode uiParent) { |
| super(attributeDescriptor, uiParent); |
| } |
| |
| /** |
| * Updates the current text field's value when the XML has changed. |
| * <p/> |
| * The caller doesn't really know if value of the element has changed, |
| * so it will call this to refresh the value anyway. The value |
| * is only set if it has changed. |
| * <p/> |
| * This also resets the "dirty" flag. |
| */ |
| @Override |
| public void updateValue(Node xml_attribute_node) { |
| setCurrentValue(DEFAULT_VALUE); |
| |
| // The argument xml_attribute_node is not used here. It should always be |
| // null since this is not an attribute. What we want is the "text value" of |
| // the parent element, which is actually the first text node of the element. |
| |
| UiElementNode parent = getUiParent(); |
| if (parent != null) { |
| Node xml_node = parent.getXmlNode(); |
| if (xml_node != null) { |
| for (Node xml_child = xml_node.getFirstChild(); |
| xml_child != null; |
| xml_child = xml_child.getNextSibling()) { |
| if (xml_child.getNodeType() == Node.TEXT_NODE) { |
| setCurrentValue(xml_child.getNodeValue()); |
| break; |
| } |
| } |
| } |
| } |
| |
| if (isValid() && !getTextWidgetValue().equals(getCurrentValue())) { |
| try { |
| setInInternalTextModification(true); |
| setTextWidgetValue(getCurrentValue()); |
| setDirty(false); |
| } finally { |
| setInInternalTextModification(false); |
| } |
| } |
| } |
| |
| /* (non-java doc) |
| * Called by the user interface when the editor is saved or its state changed |
| * and the modified "attributes" must be committed (i.e. written) to the XML model. |
| */ |
| @Override |
| public void commit() { |
| UiElementNode parent = getUiParent(); |
| if (parent != null && isValid() && isDirty()) { |
| // Get (or create) the underlying XML element node that contains the value. |
| Node element = parent.prepareCommit(); |
| if (element != null) { |
| String value = getTextWidgetValue(); |
| |
| // Try to find an existing text child to update. |
| boolean updated = false; |
| |
| for (Node xml_child = element.getFirstChild(); |
| xml_child != null; |
| xml_child = xml_child.getNextSibling()) { |
| if (xml_child.getNodeType() == Node.TEXT_NODE) { |
| xml_child.setNodeValue(value); |
| updated = true; |
| break; |
| } |
| } |
| |
| // If we didn't find a text child to update, we need to create one. |
| if (!updated) { |
| Document doc = element.getOwnerDocument(); |
| if (doc != null) { |
| Text text = doc.createTextNode(value); |
| element.appendChild(text); |
| } |
| } |
| |
| setCurrentValue(value); |
| } |
| } |
| setDirty(false); |
| } |
| } |