зеркало из https://github.com/mozilla/gecko-dev.git
Build a panel presumably for dialogs and such.
This commit is contained in:
grail%cafebabe.org
Родитель
70edc36f34
Коммит
687b7ebe3f
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/* -*- Mode: java; indent-tabs-mode: nil; c-basic-offset: 2 -*-
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*
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* The contents of this file are subject to the Mozilla Public License
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* Version 1.0 (the "License"); you may not use this file except in
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* compliance with the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS"
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* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
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* the License for the specific language governing rights and limitations
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* under the License.
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*
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* The Original Code is the Grendel mail/news client.
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*
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* The Initial Developer of the Original Code is Netscape Communications
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* Corporation. Portions created by Netscape are Copyright (C) 1997
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* Netscape Communications Corporation. All Rights Reserved.
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*
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* Created: Giao Nguyen <grail@cafebabe.org>, 13 Jan 1999.
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*/
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package grendel.ui;
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import java.io.InputStream;
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import java.io.IOException;
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import java.net.URL;
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import java.util.Hashtable;
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import java.util.Properties;
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import java.util.StringTokenizer;
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import java.util.NoSuchElementException;
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import java.awt.Container;
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import java.awt.GridBagLayout;
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import java.awt.GridBagConstraints;
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import java.awt.Insets;
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import javax.swing.JComponent;
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import javax.swing.JFrame;
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import javax.swing.JDialog;
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import javax.swing.ButtonGroup;
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import javax.swing.JPanel;
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import javax.swing.JButton;
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import javax.swing.RootPaneContainer;
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import javax.swing.JRadioButton;
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import javax.swing.JTextField;
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import javax.swing.JLabel;
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import javax.swing.SwingConstants;
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import org.w3c.dom.Element;
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import org.w3c.dom.Node;
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import com.sun.xml.parser.Resolver;
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import com.sun.xml.parser.Parser;
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import com.sun.xml.tree.XmlDocument;
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import com.sun.xml.tree.XmlDocumentBuilder;
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import com.sun.xml.tree.TreeWalker;
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import org.xml.sax.InputSource;
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import org.xml.sax.SAXException;
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import org.xml.sax.SAXParseException;
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/**
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* Build a panel from an XML data source.
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*/
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public class XMLPageBuilder extends XMLWidgetBuilder {
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static final String id_attr = "id";
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static final String label_attr = "label";
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static final String separator_attr = "separator";
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static final String radio_attr = "radio";
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static final String group_attr = "group";
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static final String accel_attr = "accel";
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static final String type_attr = "type";
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static final String dialog_tag = "dialog";
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static final String panel_tag = "panel";
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static final String input_tag = "input";
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static final String layout_attr = "layout";
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static final int ELEMENT_TYPE = 1;
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JPanel component;
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String title;
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String id;
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String attr;
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Hashtable input = new Hashtable();
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/**
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* Build a menu builder which operates on XML formatted data
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*
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* @param attr attribute
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* @param id the value of the attribute to have a match
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*/
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public XMLPageBuilder(String attr, String id) {
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this.attr = attr;
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this.id = id;
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}
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/**
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* Read the input stream and build a menubar from it
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*
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* @param stream the stream containing the XML data
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*/
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public void buildFrom(InputStream stream) {
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XmlDocument doc;
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TreeWalker tree;
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Node node;
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URL linkURL;
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Element current;
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try {
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doc = XmlDocumentBuilder.createXmlDocument(stream, false);
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current = doc.getDocumentElement();
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tree = new TreeWalker(current);
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node =
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tree.getNextElement("head").getElementsByTagName("link").item(0);
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// set the configuration contained in this node
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setConfiguration((Element)node);
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// skip to the body
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buildFrom(new TreeWalker(tree.getNextElement("body")));
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} catch (Throwable t) {
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t.printStackTrace();
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}
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}
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/**
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* Set the element as the item containing configuration for the
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* builder
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*
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* @param config the element containing configuration data
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*/
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public void setConfiguration(Element config) {
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try {
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URL linkURL;
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// get the string properties
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if (config.getAttribute("href") != null
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&& config.getAttribute("role").equals("stringprops")
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&& config.getTagName().equals("link")) {
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linkURL = getClass().getResource(config.getAttribute("href"));
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properties = new Properties();
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if (linkURL != null) properties.load(linkURL.openStream());
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}
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} catch (IOException io) {
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io.printStackTrace();
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}
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}
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/**
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* Build a menu bar from the data in the tree
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*
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* @param tree the tree containing the full set of a menubar tag
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*/
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public void buildFrom(TreeWalker tree) {
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Element current ;
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Node node;
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node = tree.getCurrent();
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current = (Element)node;
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// iterate through every node
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node = node.getFirstChild();
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node = node.getNextSibling();
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// at the very first menu tag
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while (node != null) {
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if (conditionMatch(node)) {
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processNode(node, component);
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break;
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}
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node = node.getNextSibling();
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}
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}
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boolean conditionMatch(Node node) {
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boolean match = false;
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if (node.getNodeType() == ELEMENT_TYPE) {
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Element current = (Element)node;
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String id_str = current.getAttribute(attr);
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// is the id the same as the on we're looking for?
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match = (id_str != null && id_str.equals(id));
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}
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return match;
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}
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/**
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* Process the node, extracting a widget and adding it as necessary.
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*
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* @param node the node to be processed
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* @param parent widget to parent node's extracted widget
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*/
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protected void processNode(Node node, JComponent parent) {
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JComponent item = null;
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Element current;
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if (node == null) return;
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if (node.getNodeType() != ELEMENT_TYPE) {
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processNode(node.getNextSibling(), parent);
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return;
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}
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current = (Element)node;
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String tag = current.getTagName();
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if (tag.equals(dialog_tag)) { // dialog tag .. this gets us title
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title = getReferencedLabel(current, "title");
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node = node.getFirstChild().getNextSibling();
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processNode(node, component);
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} else if (tag.equals(panel_tag)) { // panel tag ... meat!
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JPanel panel = new JPanel();
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// first panel
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if (component == null) {
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component = panel;
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}
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panel.setLayout(new GridBagLayout());
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node = node.getFirstChild().getNextSibling();
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processNode(node, panel);
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} else {
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item = buildComponent(current, parent);
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// move on to the next item
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processNode(node.getNextSibling(), parent);
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}
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}
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/**
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* Build a constraint from the element's details.
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*
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* @param current the XML element containing constraint information.
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* @return extracted constraints
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*/
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protected GridBagConstraints buildConstraints(Element current) {
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GridBagConstraints constraints = new GridBagConstraints();
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CustomInsets inset =
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new CustomInsets(current.getAttribute("insets"));
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float weightx = 0.0f;
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String fill = null;
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String width = null;
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try {
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String s = current.getAttribute("weightx");
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if (s != null) {
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weightx = Float.valueOf(s).floatValue();
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}
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} catch (NumberFormatException nfe) {}
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// fill
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fill = current.getAttribute("fill");
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if (fill != null) {
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if (fill.trim().equals("horizontal")) {
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constraints.fill = GridBagConstraints.HORIZONTAL;
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}
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}
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// gridwidth
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width = current.getAttribute("gridwidth");
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if (width != null) {
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if (width.trim().equals("remainder")) {
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constraints.gridwidth = GridBagConstraints.REMAINDER;
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}
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}
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constraints.insets = inset;
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return constraints;
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}
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protected JComponent buildComponent(Element current) {
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JComponent item = null;
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String tag = current.getTagName();
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if (tag.equals("input")) { // input tag
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item = buildInput(current);
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} else if (tag.equals("label")) {
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item = buildLabel(current);
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}
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return item;
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}
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protected JTextField buildTextField(Element current) {
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JTextField item = null;
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if (current.getAttribute("columns") != null) {
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String s = current.getAttribute("columns");
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s = s.trim();
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try {
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int column = Integer.parseInt(s);
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item = new JTextField(column);
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} catch (NumberFormatException nfe) {
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item = new JTextField();
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}
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} else {
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item = new JTextField();
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}
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return item;
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}
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protected JRadioButton buildRadioButton(Element current) {
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JRadioButton item = null;
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String label = getReferencedLabel(current, "title");
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item = new JRadioButton();
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if (label != null) {
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item.setText(label);
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}
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return item;
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}
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protected JComponent buildInput(Element current) {
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JComponent item = null;
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String type = current.getAttribute("type");
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String ID = current.getAttribute("ID");
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if (type.equals("radio")) { // radio type
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item = buildRadioButton(current);
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} else if (type.equals("text")) { // text type
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item = buildTextField(current);
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} else if (type.equals("button")) { // buttons
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item = new JButton(getReferencedLabel(current, "command"));
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} else if (type.equals("custom")) {
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item = new JButton("Custom");
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}
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if (item != null && ID != null) {
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System.out.println("Adding " + ID + " to list");
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input.put(ID, item);
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}
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return item;
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}
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protected JLabel buildLabel(Element current) {
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JLabel label = new JLabel(getReferencedLabel(current, "title"));
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label.setHorizontalAlignment(SwingConstants.RIGHT);
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return label;
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}
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public JPanel getComponent() {
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return component;
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}
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protected JComponent buildComponent(Element current, JComponent parent) {
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JComponent item = buildComponent(current);
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// item could be null if we don't know about the "type" tag for
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// example
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if (item != null) {
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GridBagConstraints cons = null;
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if (parent.getLayout() instanceof GridBagLayout) {
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cons = buildConstraints(current);
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}
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if (cons == null) {
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parent.add(item);
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} else {
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parent.add(item, cons);
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}
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} else {
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parent.add(item);
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}
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return item;
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}
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public String getTitle() {
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return title;
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}
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public static void main(String[] args) throws Exception {
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javax.swing.JFrame frame = new javax.swing.JFrame("Foo bar");
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XMLPageBuilder builder = new XMLPageBuilder(args[0], args[1]);
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URL url = builder.getClass().getResource("dialogs.xml");
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builder.buildFrom(url.openStream());
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JPanel panel = builder.getComponent();
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JDialog dialog = new JDialog();
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dialog.getContentPane().add(panel);
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dialog.setTitle(builder.getTitle());
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dialog.pack();
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dialog.setVisible(true);
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}
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class CustomInsets extends Insets {
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CustomInsets(String inset) {
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super(0, 0, 0, 0);
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inset = inset.trim();
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if (inset != null && inset.length() >= 9
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&& (inset.charAt(0) == '['
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|| inset.charAt(inset.length() - 1) == ']')) {
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inset = inset.substring(1, inset.length() - 1);
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int[] val = parseInset(inset); // guaranteed to be a length of 4
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top = val[0];
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left = val[1];
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bottom = val[2];
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right = val[3];
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}
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}
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private int[] parseInset(String inset) {
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// if all else fails, it's 0
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int[] val = { 0, 0, 0, 0 };
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StringTokenizer tok = new StringTokenizer(inset, ",");
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// assign the values into
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for (int i = 0; i < val.length; i++) {
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try {
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String s = tok.nextToken();
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val[i] = Integer.parseInt(s);
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} catch (NoSuchElementException nse) {
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// ignore. if it's fubared, we use 0 as the value
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} catch (NumberFormatException nfe) {
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// ignore. if it's fubared, we use 0 as the value
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}
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}
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return val;
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}
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}
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}
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