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1 files changed, 307 insertions, 0 deletions

diff --git a/libjava/classpath/javax/swing/text/html/InlineView.java b/libjava/classpath/javax/swing/text/html/InlineView.java
new file mode 100644
index 000000000..5376c6b9d
--- /dev/null
+++ b/libjava/classpath/javax/swing/text/html/InlineView.java
@@ -0,0 +1,307 @@
+/* InlineView.java -- Renders HTML content
+   Copyright (C) 2006 Free Software Foundation, Inc.
+
+This file is part of GNU Classpath.
+
+GNU Classpath is free software; you can redistribute it and/or modify
+it under the terms of the GNU General Public License as published by
+the Free Software Foundation; either version 2, or (at your option)
+any later version.
+
+GNU Classpath is distributed in the hope that it will be useful, but
+WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with GNU Classpath; see the file COPYING.  If not, write to the
+Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+02110-1301 USA.
+
+Linking this library statically or dynamically with other modules is
+making a combined work based on this library.  Thus, the terms and
+conditions of the GNU General Public License cover the whole
+combination.
+
+As a special exception, the copyright holders of this library give you
+permission to link this library with independent modules to produce an
+executable, regardless of the license terms of these independent
+modules, and to copy and distribute the resulting executable under
+terms of your choice, provided that you also meet, for each linked
+independent module, the terms and conditions of the license of that
+module.  An independent module is a module which is not derived from
+or based on this library.  If you modify this library, you may extend
+this exception to your version of the library, but you are not
+obligated to do so.  If you do not wish to do so, delete this
+exception statement from your version. */
+
+
+package javax.swing.text.html;
+
+import java.awt.FontMetrics;
+import java.awt.Shape;
+import java.text.BreakIterator;
+
+import javax.swing.event.DocumentEvent;
+import javax.swing.text.AttributeSet;
+import javax.swing.text.BadLocationException;
+import javax.swing.text.Document;
+import javax.swing.text.Element;
+import javax.swing.text.LabelView;
+import javax.swing.text.Segment;
+import javax.swing.text.View;
+import javax.swing.text.ViewFactory;
+
+/**
+ * Renders HTML content (identified by {@link HTML.Tag#CONTENT}). This is
+ * basically a {@link LabelView} that is adjusted to understand styles defined
+ * by stylesheets.
+ *
+ * @author Roman Kennke (kennke@aicas.com)
+ */
+public class InlineView
+  extends LabelView
+{
+
+  /**
+   * The attributes used by this view.
+   */
+  private AttributeSet attributes;
+
+  /**
+   * The span of the longest word in this view.
+   *
+   * @see #getLongestWord()
+   */
+  private float longestWord;
+
+  /**
+   * Indicates if we may wrap or not.
+   */
+  private boolean nowrap;
+
+  /**
+   * Creates a new <code>InlineView</code> that renders the specified element.
+   *
+   * @param element the element for this view
+   */
+  public InlineView(Element element)
+  {
+    super(element);
+  }
+
+  /**
+   * Receives notification that something was inserted into the document in
+   * a location that this view is responsible for.
+   *
+   * @param e the document event
+   * @param a the current allocation of this view
+   * @param f the view factory for creating new views
+   *
+   * @since 1.5
+   */
+  public void insertUpdate(DocumentEvent e, Shape a, ViewFactory f)
+  {
+    // FIXME: What to do here?
+    super.insertUpdate(e, a, f);
+  }
+
+  /**
+   * Receives notification that something was removed from the document in
+   * a location that this view is responsible for.
+   *
+   * @param e the document event
+   * @param a the current allocation of this view
+   * @param f the view factory for creating new views
+   *
+   * @since 1.5
+   */
+  public void removeUpdate(DocumentEvent e, Shape a, ViewFactory f)
+  {
+    // FIXME: What to do here?
+    super.removeUpdate(e, a, f);
+  }
+
+  /**
+   * Receives notification that attributes have changed in the document in
+   * a location that this view is responsible for. This calls
+   * {@link #setPropertiesFromAttributes}.
+   *
+   * @param e the document event
+   * @param a the current allocation of this view
+   * @param f the view factory for creating new views
+   *
+   * @since 1.5
+   */
+  public void changedUpdate(DocumentEvent e, Shape a, ViewFactory f)
+  {
+    super.changedUpdate(e, a, f);
+    StyleSheet ss = getStyleSheet();
+    attributes = ss.getViewAttributes(this);
+    preferenceChanged(null, true, true);
+    setPropertiesFromAttributes();
+  }
+
+  /**
+   * Returns the attributes that are used for rendering. This is implemented
+   * to multiplex the attributes specified in the model with a stylesheet.
+   *
+   * @return the attributes that are used for rendering
+   */
+  public AttributeSet getAttributes()
+  {
+    if (attributes == null)
+      {
+        StyleSheet ss = getStyleSheet();
+        attributes = ss.getViewAttributes(this);
+      }
+    return attributes;
+  }
+
+
+  public int getBreakWeight(int axis, float pos, float len)
+  {
+    int weight;
+    if (nowrap)
+      weight = BadBreakWeight;
+    else
+      weight = super.getBreakWeight(axis, pos, len);
+    return weight;
+  }
+
+  public View breakView(int axis, int offset, float pos, float len)
+  {
+    // FIXME: Implement this.
+    return super.breakView(axis, offset, pos, len);
+  }
+
+  /**
+   * Loads the character style properties from the stylesheet.
+   */
+  protected void setPropertiesFromAttributes()
+  {
+    super.setPropertiesFromAttributes();
+    AttributeSet atts = getAttributes();
+    Object o = atts.getAttribute(CSS.Attribute.TEXT_DECORATION);
+
+    // Check for underline.
+    boolean b = false;
+    if (o != null && o.toString().contains("underline"))
+      b = true;
+    setUnderline(b);
+
+    // Check for line-through.
+    b = false;
+    if (o != null && o.toString().contains("line-through"))
+      b = true;
+    setStrikeThrough(b);
+
+    // Check for vertical alignment (subscript/superscript).
+    o = atts.getAttribute(CSS.Attribute.VERTICAL_ALIGN);
+
+    // Subscript.
+    b = false;
+    if (o != null && o.toString().contains("sub"))
+      b = true;
+    setSubscript(b);
+
+    // Superscript.
+    b = false;
+    if (o != null && o.toString().contains("sup"))
+      b = true;
+    setSuperscript(b);
+
+    // Fetch nowrap setting.
+    o = atts.getAttribute(CSS.Attribute.WHITE_SPACE);
+    if (o != null && o.equals("nowrap"))
+      nowrap = true;
+    else
+      nowrap = false;
+  }
+
+  /**
+   * Returns the stylesheet used by this view. This returns the stylesheet
+   * of the <code>HTMLDocument</code> that is rendered by this view.
+   *
+   * @return the stylesheet used by this view
+   */
+  protected StyleSheet getStyleSheet()
+  {
+    Document doc = getDocument();
+    StyleSheet styleSheet = null;
+    if (doc instanceof HTMLDocument)
+      styleSheet = ((HTMLDocument) doc).getStyleSheet();
+    return styleSheet;
+  }
+
+  /**
+   * Returns the minimum span for the specified axis. This returns the
+   * width of the longest word for the X axis and the super behaviour for
+   * the Y axis. This is a slight deviation from the reference implementation.
+   * IMO this should improve rendering behaviour so that an InlineView never
+   * gets smaller than the longest word in it.
+   */
+  public float getMinimumSpan(int axis)
+  {
+    float min = super.getMinimumSpan(axis);
+    if (axis == X_AXIS)
+      min = Math.max(getLongestWord(), min);
+    return min;
+  }
+
+  /**
+   * Returns the span of the longest word in this view.
+   *
+   * @return the span of the longest word in this view
+   */
+  private float getLongestWord()
+  {
+    if (longestWord == -1)
+      longestWord = calculateLongestWord();
+    return longestWord;
+  }
+
+  /**
+   * Calculates the span of the longest word in this view.
+   *
+   * @return the span of the longest word in this view
+   */
+  private float calculateLongestWord()
+  {
+    float span = 0;
+    try
+      {
+        Document doc = getDocument();
+        int p0 = getStartOffset();
+        int p1 = getEndOffset();
+        Segment s = new Segment();
+        doc.getText(p0, p1 - p0, s);
+        BreakIterator iter = BreakIterator.getWordInstance();
+        iter.setText(s);
+        int wordStart = p0;
+        int wordEnd = p0;
+        int start = iter.first();
+        for (int end = iter.next(); end != BreakIterator.DONE;
+             start = end, end = iter.next())
+          {
+            if ((end - start) > (wordEnd - wordStart))
+              {
+                wordStart = start;
+                wordEnd = end;
+              }
+          }
+        if (wordEnd - wordStart > 0)
+          {
+            FontMetrics fm = getFontMetrics();
+            int offset = s.offset + wordStart - s.getBeginIndex();
+            span = fm.charsWidth(s.array, offset, wordEnd - wordStart);
+          }
+      }
+    catch (BadLocationException ex)
+      {
+        // Return 0.
+      }
+    return span;
+  }
+
+}