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1 package org.lobobrowser.html.test;
2
3 import java.awt.BorderLayout  ;
4 import java.awt.Container ;
5 import java.awt.HeadlessException ;
6 import java.awt.event.ActionEvent ;
7 import java.awt.event.ActionListener ;
8 import java.net.*;
9 import java.io.*;
10 import java.util.logging.*;
11
12 import javax.swing.JButton ;
13 import javax.swing.JFrame ;
14 import javax.swing.JLabel ;
15 import javax.swing.JPanel ;
16 import javax.swing.JScrollPane ;
17 import javax.swing.JTabbedPane ;
18 import javax.swing.JTextArea ;
19 import javax.swing.JTextField ;
20 import javax.swing.JTree ;
21 import javax.swing.event.ChangeEvent ;
22 import javax.swing.event.ChangeListener ;
23
24 import org.lobobrowser.html.*;
25 import org.lobobrowser.html.gui.*;
26 import org.lobobrowser.html.parser.*;
27 import org.lobobrowser.html.style.*;
28 import org.lobobrowser.util.io.*;
29 import org.w3c.css.sac.*;
30 import org.w3c.css.*;
31 import org.w3c.dom.css.*;
32
33 import com.steadystate.css.parser.CSSOMParser;
34
35
38 public class CssParserTest extends JFrame {
39 private static final Logger logger = Logger.getLogger(CssParserTest.class.getName());
40 private final HtmlPanel cssOutput;
41 private final JTextArea textArea;
42
43 public CssParserTest() throws HeadlessException {
44 this("CSS Parser Test Tool");
45 }
46
47 public CssParserTest(String title) throws HeadlessException {
48 super(title);
49 this.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
50 Container contentPane = this.getContentPane();
51 contentPane.setLayout(new BorderLayout ());
52 JPanel topPanel = new JPanel ();
53 topPanel.setLayout(new BorderLayout ());
54 JPanel bottomPanel = new JPanel ();
55 bottomPanel.setLayout(new BorderLayout ());
56 final JTextField textField = new JTextField ();
57 JButton button = new JButton ("Parse & Render");
58 final JTabbedPane tabbedPane = new JTabbedPane ();
59
60 HtmlPanel htmlPanel = new HtmlPanel();
61 this.cssOutput = htmlPanel;
62
63 contentPane.add(topPanel, BorderLayout.NORTH);
64 contentPane.add(bottomPanel, BorderLayout.CENTER);
65
66 topPanel.add(new JLabel ("URL: "), BorderLayout.WEST);
67 topPanel.add(textField, BorderLayout.CENTER);
68 topPanel.add(button, BorderLayout.EAST);
69
70 bottomPanel.add(tabbedPane, BorderLayout.CENTER);
71
72 final JTextArea textArea = new JTextArea ();
73 this.textArea = textArea;
74 final JScrollPane textAreaSp = new JScrollPane (textArea);
75
76 tabbedPane.addTab("Parsed CSS", htmlPanel);
77 tabbedPane.addTab("Source Code", textAreaSp);
78
79 button.addActionListener(new ActionListener () {
80 public void actionPerformed(ActionEvent event) {
81 process(textField.getText());
82 }
83 });
84 }
85
86
87 private void process(String uri) {
88 try {
89 URL url;
90 try {
91 url = new URL(uri);
92 } catch(java.net.MalformedURLException mfu) {
93 int idx = uri.indexOf(':');
94 if(idx == -1 || idx == 1) {
95 url = new URL("file:" + uri);
97 }
98 else {
99 throw mfu;
100 }
101 }
102 logger.info("process(): Loading URI=[" + uri + "].");
103 long time0 = System.currentTimeMillis();
104 URLConnection connection = url.openConnection();
105 connection.setRequestProperty("User-Agent", "Mozilla/4.0 (compatible;) Cobra/0.96.1+");
106 connection.setRequestProperty("Cookie", "");
107 if(connection instanceof HttpURLConnection) {
108 HttpURLConnection hc = (HttpURLConnection) connection;
109 hc.setInstanceFollowRedirects(true);
110 int responseCode = hc.getResponseCode();
111 logger.info("process(): HTTP response code: " + responseCode);
112 }
113 InputStream in = connection.getInputStream();
114 byte[] content;
115 try {
116 content = IORoutines.load(in, 8192);
117 } finally {
118 in.close();
119 }
120 String source = new String (content, "ISO-8859-1");
121 this.textArea.setText(source);
122 long time1 = System.currentTimeMillis();
123 CSSOMParser parser = new CSSOMParser();
124 InputSource is = CSSUtilities.getCssInputSourceForStyleSheet(source);
125 CSSStyleSheet styleSheet = parser.parseStyleSheet(is);
126 long time2 = System.currentTimeMillis();
127 logger.info("Parsed URI=[" + uri + "]: Parse elapsed: " + (time2 - time1) + " ms. Load elapsed: " + (time1 - time0) + " ms.");
128 this.showStyleSheet(styleSheet);
129 } catch(Exception err) {
130 logger.log(Level.SEVERE, "Error trying to load URI=[" + uri + "].", err);
131 this.clearCssOutput();
132 }
133 }
134
135 private void clearCssOutput() {
136 this.cssOutput.clearDocument();
137 }
138
139 private void showStyleSheet(CSSStyleSheet styleSheet) {
140 StringWriter stringWriter = new StringWriter();
141 PrintWriter writer = new PrintWriter(stringWriter);
142 writer.println("<DL>");
143 CSSRuleList ruleList = styleSheet.getCssRules();
144 int length = ruleList.getLength();
145 for(int i = 0; i < length; i++) {
146 CSSRule rule = ruleList.item(i);
147 writer.println("<DT><strong>Rule: type=" + rule.getType() + ",class=" + rule.getClass().getName() + "</strong></DT>");
148 writer.println("<DD>");
149 this.writeRuleInfo(writer, rule);
150 writer.println("</DD>");
151 }
152 writer.println("</DL>");
153 writer.flush();
154 String html = stringWriter.toString();
155 HtmlRendererContext rcontext = new SimpleHtmlRendererContext(this.cssOutput);
156 this.cssOutput.setHtml(html, "about:css", rcontext);
157 }
158
159 private void writeRuleInfo(PrintWriter writer, CSSRule rule) {
160 if(rule instanceof CSSStyleRule) {
161 CSSStyleRule styleRule = (CSSStyleRule) rule;
162 writer.println("Selector: " + styleRule.getSelectorText());
163 writer.println("<br>");
164 writer.println("CSS Text: " + styleRule.getCssText());
165 }
166 else if(rule instanceof CSSImportRule) {
167 CSSImportRule styleRule = (CSSImportRule) rule;
168 writer.println("HREF: " + styleRule.getHref());
169 writer.println("<br>");
170 writer.println("CSS Text: " + styleRule.getCssText());
171 }
172 }
173
174 public static void main(String [] args) {
175 CssParserTest frame = new CssParserTest();
176 frame.setSize(800, 400);
177 frame.setExtendedState(TestFrame.MAXIMIZED_BOTH);
178 frame.setVisible(true);
179 }
180 }
181 |
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