Start using computed style instead of default tag actions.

test/com/dom_distiller/client/BoilerpipeHTMLContentHandlerTest.java

Index: test/com/dom_distiller/client/BoilerpipeHTMLContentHandlerTest.java
diff --git a/test/com/dom_distiller/client/BoilerpipeHTMLContentHandlerTest.java b/test/com/dom_distiller/client/BoilerpipeHTMLContentHandlerTest.java
new file mode 100644
index 0000000000000000000000000000000000000000..e981138a8dd3ac7972e799c87b154c57698bbe71
--- /dev/null
+++ b/test/com/dom_distiller/client/BoilerpipeHTMLContentHandlerTest.java
@@ -0,0 +1,203 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+package com.dom_distiller.client;
+
+import com.dom_distiller.client.sax.AttributesImpl;
+import com.dom_distiller.client.sax.ContentHandler;
+import com.google.gwt.dom.client.Document;
+import com.google.gwt.dom.client.Element;
+import com.google.gwt.junit.client.GWTTestCase;
+
+import java.util.List;
+
+import de.l3s.boilerpipe.document.TextBlock;
+import de.l3s.boilerpipe.sax.BoilerpipeHTMLContentHandler;
+
+public class BoilerpipeHTMLContentHandlerTest extends GWTTestCase {
+
+    private static final String TEXT1 = "Some really long text which should be content.";
+    private static final String TEXT2 = "Another really long text thing which should be content.";
+    private static final String TEXT3 = "And again a third long text for testing.";
+
+    public String getModuleName() {
+        return "com.dom_distiller.DomDistillerJUnit";
+    }
+

[Yaron, 2014/05/29 01:09:10]

Do you want to add tests for the default actions for the tags removed from
DefaultTagActionMap or does that seem like overkill?

[nyquist, 2014/05/29 23:42:25]

It seems like GWT doesn't handle the defaults correctly, even for the typed ones
such as textarea:
http://www.gwtproject.org/javadoc/latest/com/google/gwt/user/client/DOM.html
Except <span> they all seem to be treated as block level elements.

It does not seem to parse inline / text markup correctly. See
https://developer.mozilla.org/en-US/docs/Web/HTML/Inline_elemente and
http://www.w3.org/TR/html4/sgml/dtd.html#inline (and the section on Text Markup
in general).

+    public void testSpansAsInline() {
+        BoilerpipeHTMLContentHandler handler = new BoilerpipeHTMLContentHandler();
+        handler.startDocument();
+        Element body = Document.get().createElement("body");
+        startElement(handler, body);
+
+        // <span>
+        //   TEXT1
+        //   <span>
+        //     TEXT2
+        //   </span>
+        //   TEXT3
+        // </span>
+        Element outerSpan = Document.get().createElement("span");
+        startElement(handler, outerSpan);
+        addText(handler, TEXT1);
+        Element innerSpan = Document.get().createElement("span");
+        startElement(handler, innerSpan);
+        addText(handler, TEXT2);
+        endElement(handler, innerSpan);
+        addText(handler, TEXT3);
+        endElement(handler, outerSpan);
+
+        endElement(handler, body);
+        handler.endDocument();
+
+        List<TextBlock> textBlocks = handler.toTextDocument().getTextBlocks();
+        assertEquals(1, textBlocks.size());
+        assertEquals(1, textBlocks.get(0).getTagLevel());
+    }
+
+    public void testDivsAsInline() {
+        BoilerpipeHTMLContentHandler handler = new BoilerpipeHTMLContentHandler();
+        handler.startDocument();
+        Element body = Document.get().createElement("body");
+        startElement(handler, body);
+
+        // <span>
+        //   TEXT1
+        //   <div style="display: inline;">
+        //     TEXT2
+        //   </div>
+        //   TEXT3
+        // </span>
+        Element span = Document.get().createElement("span");
+        startElement(handler, span);
+        addText(handler, TEXT1);
+        Element div = Document.get().createDivElement();
+        div.setAttribute("style", "display: inline;");
+        startElement(handler, div);
+        addText(handler, TEXT2);
+        endElement(handler, div);
+        addText(handler, TEXT3);
+        endElement(handler, span);
+
+        endElement(handler, body);
+        handler.endDocument();
+
+        List<TextBlock> textBlocks = handler.toTextDocument().getTextBlocks();
+        assertEquals(1, textBlocks.size());
+        assertEquals(1, textBlocks.get(0).getTagLevel());
+    }
+
+    public void testDivsAsBlocks() {
+        BoilerpipeHTMLContentHandler handler = new BoilerpipeHTMLContentHandler();
+        handler.startDocument();
+        Element body = Document.get().createElement("body");
+        startElement(handler, body);
+
+        // <div>
+        //   TEXT1
+        //   <div>
+        //     TEXT2
+        //   </div>
+        //   TEXT3
+        // </div>
+        Element div = Document.get().createDivElement();
+        startElement(handler, div);
+        addText(handler, TEXT1);
+        Element span = Document.get().createDivElement();
+        startElement(handler, span);
+        addText(handler, TEXT2);
+        endElement(handler, span);
+        addText(handler, TEXT3);
+        endElement(handler, div);
+
+        endElement(handler, body);
+        handler.endDocument();
+
+        List<TextBlock> textBlocks = handler.toTextDocument().getTextBlocks();
+        assertEquals(3, textBlocks.size());
+        assertEquals(2, textBlocks.get(0).getTagLevel());
+        assertEquals(3, textBlocks.get(1).getTagLevel());
+        assertEquals(2, textBlocks.get(2).getTagLevel());
+    }
+
+    public void testSpansAsBlocks() {
+        BoilerpipeHTMLContentHandler handler = new BoilerpipeHTMLContentHandler();
+        handler.startDocument();
+        Element body = Document.get().createElement("body");
+        startElement(handler, body);
+
+        // <div>
+        //   TEXT1
+        //   <span style="display: block;">
+        //     TEXT2
+        //   </span>
+        //   TEXT3
+        // </div>
+        Element div = Document.get().createDivElement();
+        startElement(handler, div);
+        addText(handler, TEXT1);
+        Element span = Document.get().createElement("span");
+        span.setAttribute("style", "display: block;");
+        startElement(handler, span);
+        addText(handler, TEXT2);
+        endElement(handler, span);
+        addText(handler, TEXT3);
+        endElement(handler, div);
+
+        endElement(handler, body);
+        handler.endDocument();
+
+        List<TextBlock> textBlocks = handler.toTextDocument().getTextBlocks();
+        assertEquals(3, textBlocks.size());
+        assertEquals(2, textBlocks.get(0).getTagLevel());
+        assertEquals(3, textBlocks.get(1).getTagLevel());
+        assertEquals(2, textBlocks.get(2).getTagLevel());
+    }
+
+    public void testHeadingsAsBlocks() {
+        BoilerpipeHTMLContentHandler handler = new BoilerpipeHTMLContentHandler();
+        handler.startDocument();
+        Element body = Document.get().createElement("body");
+        startElement(handler, body);
+
+        // <div>
+        //   TEXT1
+        //   <h1>
+        //     TEXT2
+        //   </h1>
+        //   TEXT3
+        // </div>
+        Element div = Document.get().createDivElement();
+        startElement(handler, div);
+        addText(handler, TEXT1);
+        Element h1 = Document.get().createElement("h1");
+        h1.setAttribute("style", "display: block;");
+        startElement(handler, h1);
+        addText(handler, TEXT2);
+        endElement(handler, h1);
+        addText(handler, TEXT3);
+        endElement(handler, div);
+
+        endElement(handler, body);
+        handler.endDocument();
+
+        List<TextBlock> textBlocks = handler.toTextDocument().getTextBlocks();
+        assertEquals(3, textBlocks.size());
+        assertEquals(2, textBlocks.get(0).getTagLevel());
+        assertEquals(3, textBlocks.get(1).getTagLevel());
+        assertEquals(2, textBlocks.get(2).getTagLevel());
+    }
+
+    private void startElement(ContentHandler handler, Element e) {
+        handler.startElement(null, e.getTagName(), e.getTagName(), e, new AttributesImpl());
+    }
+
+    private void addText(ContentHandler handler, String text) {
+        handler.characters(text.toCharArray(), 0, text.length());
+    }
+
+    private void endElement(ContentHandler handler, Element e) {
+        handler.endElement(null, e.getTagName(), e.getTagName(), e);
+    }
+}