htmleditorkit.java

Mobile 应用程序使用 Java Micro Edition (Java ME) 平台

                                    s2.getBounds();
			r1.add(r2);
		    }
                    return r1.contains(x, y);
                } catch (BadLocationException ble) {
                }
            }
            return true;
        }

	/**
	 * Calls linkActivated on the associated JEditorPane
	 * if the given position represents a link.<p>This is implemented
	 * to forward to the method with the same name, but with the following
	 * args both == -1.
         *
         * @param pos the position
         * @param editor the editor pane
	 */
	protected void activateLink(int pos, JEditorPane editor) {
	    activateLink(pos, editor, -1, -1);
	}

	/**
	 * Calls linkActivated on the associated JEditorPane
	 * if the given position represents a link. If this was the result
	 * of a mouse click, <code>x</code> and
	 * <code>y</code> will give the location of the mouse, otherwise
	 * they will be < 0.
         *
         * @param pos the position
         * @param html the editor pane
	 */
        void activateLink(int pos, JEditorPane html, int x, int y) {
	    Document doc = html.getDocument();
	    if (doc instanceof HTMLDocument) {
		HTMLDocument hdoc = (HTMLDocument) doc;
		Element e = hdoc.getCharacterElement(pos);
		AttributeSet a = e.getAttributes();
		AttributeSet anchor = (AttributeSet)a.getAttribute(HTML.Tag.A);
		HyperlinkEvent linkEvent = null;
                String description;

                if (anchor == null) {
                    href = getMapHREF(html, hdoc, e, a, pos, x, y);
                }
                else {
                    href = (String)anchor.getAttribute(HTML.Attribute.HREF);
                }

		if (href != null) {
		    linkEvent = createHyperlinkEvent(html, hdoc, href, anchor,
                                                     e);
		}
		if (linkEvent != null) {
		    html.fireHyperlinkUpdate(linkEvent);
		}
	    }
	}

	/**
	 * Creates and returns a new instance of HyperlinkEvent. If
	 * <code>hdoc</code> is a frame document a HTMLFrameHyperlinkEvent
	 * will be created.
	 */
	HyperlinkEvent createHyperlinkEvent(JEditorPane html,
					    HTMLDocument hdoc, String href,
					    AttributeSet anchor,
                                            Element element) {
	    URL u;
	    try {
		URL base = hdoc.getBase();
		u = new URL(base, href);
		// Following is a workaround for 1.2, in which
		// new URL("file://...", "#...") causes the filename to
		// be lost.
		if (href != null && "file".equals(u.getProtocol()) &&
		    href.startsWith("#")) {
		    String baseFile = base.getFile();
		    String newFile = u.getFile();
		    if (baseFile != null && newFile != null &&
			!newFile.startsWith(baseFile)) {
			u = new URL(base, baseFile + href);
		    }
		}
	    } catch (MalformedURLException m) {
		u = null;
	    }
	    HyperlinkEvent linkEvent = null;

	    if (!hdoc.isFrameDocument()) {
		linkEvent = new HyperlinkEvent(html, HyperlinkEvent.EventType.
					       ACTIVATED, u, href, element);
	    } else {
		String target = (anchor != null) ?
		    (String)anchor.getAttribute(HTML.Attribute.TARGET) : null;
		if ((target == null) || (target.equals(""))) {
		    target = hdoc.getBaseTarget();
		}
		if ((target == null) || (target.equals(""))) {
		    target = "_self";
		}
		linkEvent = new HTMLFrameHyperlinkEvent(html, HyperlinkEvent.
			     EventType.ACTIVATED, u, href, element, target);
	    }
	    return linkEvent;
	}

	void fireEvents(JEditorPane editor, HTMLDocument doc, String href,
                        Element lastElem) {
	    if (this.href != null) {
		// fire an exited event on the old link
		URL u;
		try {
		    u = new URL(doc.getBase(), this.href);
		} catch (MalformedURLException m) {
		    u = null;
		}
		HyperlinkEvent exit = new HyperlinkEvent(editor,
			         HyperlinkEvent.EventType.EXITED, u, this.href,
                                 lastElem);
		editor.fireHyperlinkUpdate(exit);
	    }
	    if (href != null) {
		// fire an entered event on the new link
		URL u;
		try {
		    u = new URL(doc.getBase(), href);
		} catch (MalformedURLException m) {
		    u = null;
		}
		HyperlinkEvent entered = new HyperlinkEvent(editor,
					    HyperlinkEvent.EventType.ENTERED,
					    u, href, curElem);
		editor.fireHyperlinkUpdate(entered);
	    }
	}
    }

    /**
     * Interface to be supported by the parser.  This enables
     * providing a different parser while reusing some of the
     * implementation provided by this editor kit.
     */
    public static abstract class Parser {
	/**
	 * Parse the given stream and drive the given callback 
	 * with the results of the parse.  This method should
	 * be implemented to be thread-safe.
	 */
	public abstract void parse(Reader r, ParserCallback cb, boolean ignoreCharSet) throws IOException;

    }

    /**
     * The result of parsing drives these callback methods.
     * The open and close actions should be balanced.  The
     * <code>flush</code> method will be the last method
     * called, to give the receiver a chance to flush any
     * pending data into the document.
     * <p>Refer to DocumentParser, the default parser used, for further
     * information on the contents of the AttributeSets, the positions, and
     * other info.
     *
     * @see javax.swing.text.html.parser.DocumentParser
     */
    public static class ParserCallback {
	/**
	 * This is passed as an attribute in the attributeset to indicate
	 * the element is implied eg, the string '&lt;&gt;foo&lt;\t&gt;' 
	 * contains an implied html element and an implied body element.
	 *
	 * @since 1.3
	 */
	public static final Object IMPLIED = "_implied_";


        public void flush() throws BadLocationException {
	}

        public void handleText(char[] data, int pos) {
	}

        public void handleComment(char[] data, int pos) {
	}

	public void handleStartTag(HTML.Tag t, MutableAttributeSet a, int pos) {
	}

	public void handleEndTag(HTML.Tag t, int pos) {
	}

	public void handleSimpleTag(HTML.Tag t, MutableAttributeSet a, int pos) {
	}

	public void handleError(String errorMsg, int pos){
	}

	/**
	 * This is invoked after the stream has been parsed, but before
	 * <code>flush</code>. <code>eol</code> will be one of \n, \r
	 * or \r\n, which ever is encountered the most in parsing the
	 * stream.
	 *
	 * @since 1.3
	 */
	public void handleEndOfLineString(String eol) {
	}
    }

    /**
     * A factory to build views for HTML.  The following 
     * table describes what this factory will build by
     * default.
     *
     * <table summary="Describes the tag and view created by this factory by default">
     * <tr>
     * <th align=left>Tag<th align=left>View created
     * </tr><tr>
     * <td>HTML.Tag.CONTENT<td>InlineView
     * </tr><tr>
     * <td>HTML.Tag.IMPLIED<td>javax.swing.text.html.ParagraphView
     * </tr><tr>
     * <td>HTML.Tag.P<td>javax.swing.text.html.ParagraphView
     * </tr><tr>
     * <td>HTML.Tag.H1<td>javax.swing.text.html.ParagraphView
     * </tr><tr>
     * <td>HTML.Tag.H2<td>javax.swing.text.html.ParagraphView
     * </tr><tr>
     * <td>HTML.Tag.H3<td>javax.swing.text.html.ParagraphView
     * </tr><tr>
     * <td>HTML.Tag.H4<td>javax.swing.text.html.ParagraphView
     * </tr><tr>
     * <td>HTML.Tag.H5<td>javax.swing.text.html.ParagraphView
     * </tr><tr>
     * <td>HTML.Tag.H6<td>javax.swing.text.html.ParagraphView
     * </tr><tr>
     * <td>HTML.Tag.DT<td>javax.swing.text.html.ParagraphView
     * </tr><tr>
     * <td>HTML.Tag.MENU<td>ListView
     * </tr><tr>
     * <td>HTML.Tag.DIR<td>ListView
     * </tr><tr>
     * <td>HTML.Tag.UL<td>ListView
     * </tr><tr>
     * <td>HTML.Tag.OL<td>ListView
     * </tr><tr>
     * <td>HTML.Tag.LI<td>BlockView
     * </tr><tr>
     * <td>HTML.Tag.DL<td>BlockView
     * </tr><tr>
     * <td>HTML.Tag.DD<td>BlockView
     * </tr><tr>
     * <td>HTML.Tag.BODY<td>BlockView
     * </tr><tr>
     * <td>HTML.Tag.HTML<td>BlockView
     * </tr><tr>
     * <td>HTML.Tag.CENTER<td>BlockView
     * </tr><tr>
     * <td>HTML.Tag.DIV<td>BlockView
     * </tr><tr>
     * <td>HTML.Tag.BLOCKQUOTE<td>BlockView
     * </tr><tr>
     * <td>HTML.Tag.PRE<td>BlockView
     * </tr><tr>
     * <td>HTML.Tag.BLOCKQUOTE<td>BlockView
     * </tr><tr>
     * <td>HTML.Tag.PRE<td>BlockView
     * </tr><tr>
     * <td>HTML.Tag.IMG<td>ImageView
     * </tr><tr>
     * <td>HTML.Tag.HR<td>HRuleView
     * </tr><tr>
     * <td>HTML.Tag.BR<td>BRView
     * </tr><tr>
     * <td>HTML.Tag.TABLE<td>javax.swing.text.html.TableView
     * </tr><tr>
     * <td>HTML.Tag.INPUT<td>FormView
     * </tr><tr>
     * <td>HTML.Tag.SELECT<td>FormView
     * </tr><tr>
     * <td>HTML.Tag.TEXTAREA<td>FormView
     * </tr><tr>
     * <td>HTML.Tag.OBJECT<td>ObjectView
     * </tr><tr>
     * <td>HTML.Tag.FRAMESET<td>FrameSetView
     * </tr><tr>
     * <td>HTML.Tag.FRAME<td>FrameView
     * </tr>
     * </table>
     */
    public static class HTMLFactory implements ViewFactory {
    
	/**
	 * Creates a view from an element.
	 *
	 * @param elem the element
	 * @return the view
	 */
        public View create(Element elem) {
            AttributeSet attrs = elem.getAttributes();
 	    Object elementName = 
                attrs.getAttribute(AbstractDocument.ElementNameAttribute);
	    Object o = (elementName != null) ? 
		null : attrs.getAttribute(StyleConstants.NameAttribute);
	    if (o instanceof HTML.Tag) {
		HTML.Tag kind = (HTML.Tag) o;
		if (kind == HTML.Tag.CONTENT) {
		    return new InlineView(elem);
		} else if (kind == HTML.Tag.IMPLIED) {
		    String ws = (String) elem.getAttributes().getAttribute(
			CSS.Attribute.WHITE_SPACE);
		    if ((ws != null) && ws.equals("pre")) {
			return new LineView(elem);
		    }
		    return new javax.swing.text.html.ParagraphView(elem);
		} else if ((kind == HTML.Tag.P) ||
			   (kind == HTML.Tag.H1) ||
			   (kind == HTML.Tag.H2) ||
			   (kind == HTML.Tag.H3) ||
			   (kind == HTML.Tag.H4) ||
			   (kind == HTML.Tag.H5) ||
			   (kind == HTML.Tag.H6) ||
			   (kind == HTML.Tag.DT)) {
		    // paragraph
		    return new javax.swing.text.html.ParagraphView(elem);
		} else if ((kind == HTML.Tag.MENU) || 
			   (kind == HTML.Tag.DIR) ||
			   (kind == HTML.Tag.UL)   || 
			   (kind == HTML.Tag.OL)) {
		    return new ListView(elem);
		} else if (kind == HTML.Tag.BODY) {
		    return new BodyBlockView(elem);
		} else if (kind == HTML.Tag.HTML) {
		    return new BlockView(elem, View.Y_AXIS);
		} else if ((kind == HTML.Tag.LI) || 
			   (kind == HTML.Tag.CENTER) ||
			   (kind == HTML.Tag.DL) ||
			   (kind == HTML.Tag.DD) || 
			   (kind == HTML.Tag.DIV) ||
			   (kind == HTML.Tag.BLOCKQUOTE) || 
			   (kind == HTML.Tag.PRE) ||
                           (kind == HTML.Tag.FORM)) {
		    // vertical box
		    return new BlockView(elem, View.Y_AXIS);
		} else if (kind == HTML.Tag.NOFRAMES) {
		    return new NoFramesView(elem, View.Y_AXIS);
		} else if (kind==HTML.Tag.IMG) {
		    return new ImageView(elem);
		} else if (kind == HTML.Tag.ISINDEX) {
		    return new IsindexView(elem);
		} else if (kind == HTML.Tag.HR) {
		    return new HRuleView(elem);
		} else if (kind == HTML.Tag.BR) {
		    return new BRView(elem);
		} else if (kind == HTML.Tag.TABLE) {
		    return new javax.swing.text.html.TableView(elem);
		} else if ((kind == HTML.Tag.INPUT) ||
			   (kind == HTML.Tag.SELECT) ||
			   (kind == HTML.Tag.TEXTAREA)) {
		    return new FormView(elem);
		} else if (kind == HTML.Tag.OBJECT) {
		    return new ObjectView(elem);
		} else if (kind == HTML.Tag.FRAMESET) {
                     if (elem.getAttributes().isDefined(HTML.Attribute.ROWS)) {
                         return new FrameSetView(elem, View.Y_AXIS);
                     } else if (elem.getAttributes().isDefined(HTML.Attribute.COLS)) {
                         return new FrameSetView(elem, View.X_AXIS);
                     }
                     throw new RuntimeException("Can't build a"  + kind + ", " + elem + ":" +
                                     "no ROWS or COLS defined.");
                } else if (kind == HTML.Tag.FRAME) {
 		    return new FrameView(elem);
                } else if (kind instanceof HTML.UnknownTag) {
		    return new HiddenTagView(elem);
		} else if (kind == HTML.Tag.COMMENT) {
		    return new CommentView(elem);
		} else if (kind == HTML.Tag.HEAD) {
		    // Make the head never visible, and never load its
		    // children. For Cursor positioning,
		    // getNextVisualPositionFrom is overriden to always return
		    // the end offset of the element.
		    return new BlockView(elem, View.X_AXIS) {
			public float getPreferredSpan(int axis) {
			    return 0;
			}