author | kaddepalli |
Wed, 14 Mar 2018 15:41:29 +0530 | |
changeset 49295 | 8d8f74e84ff6 |
parent 47216 | 71c04702a3d5 |
child 51067 | 0961485fc686 |
permissions | -rw-r--r-- |
2 | 1 |
/* |
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* Copyright (c) 1997, 2013, Oracle and/or its affiliates. All rights reserved. |
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* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
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* |
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* This code is free software; you can redistribute it and/or modify it |
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* under the terms of the GNU General Public License version 2 only, as |
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* published by the Free Software Foundation. Oracle designates this |
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* particular file as subject to the "Classpath" exception as provided |
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* by Oracle in the LICENSE file that accompanied this code. |
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* |
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* This code is distributed in the hope that it will be useful, but WITHOUT |
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
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* version 2 for more details (a copy is included in the LICENSE file that |
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* accompanied this code). |
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* |
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* You should have received a copy of the GNU General Public License version |
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* 2 along with this work; if not, write to the Free Software Foundation, |
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* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
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* |
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* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
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* or visit www.oracle.com if you need additional information or have any |
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* questions. |
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*/ |
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package javax.swing.text.html; |
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import java.awt.*; |
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import java.awt.image.ImageObserver; |
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import java.net.*; |
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import java.util.Dictionary; |
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import javax.swing.*; |
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import javax.swing.text.*; |
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import javax.swing.event.*; |
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/** |
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* View of an Image, intended to support the HTML <IMG> tag. |
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* Supports scaling via the HEIGHT and WIDTH attributes of the tag. |
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* If the image is unable to be loaded any text specified via the |
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* <code>ALT</code> attribute will be rendered. |
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* <p> |
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* While this class has been part of swing for a while now, it is public |
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* as of 1.4. |
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* |
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* @author Scott Violet |
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* @see IconView |
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* @since 1.4 |
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*/ |
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public class ImageView extends View { |
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/** |
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* If true, when some of the bits are available a repaint is done. |
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* <p> |
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* This is set to false as swing does not offer a repaint that takes a |
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* delay. If this were true, a bunch of immediate repaints would get |
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* generated that end up significantly delaying the loading of the image |
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* (or anything else going on for that matter). |
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*/ |
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private static boolean sIsInc = false; |
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/** |
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* Repaint delay when some of the bits are available. |
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*/ |
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private static int sIncRate = 100; |
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/** |
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* Property name for pending image icon |
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*/ |
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private static final String PENDING_IMAGE = "html.pendingImage"; |
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/** |
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* Property name for missing image icon |
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*/ |
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private static final String MISSING_IMAGE = "html.missingImage"; |
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/** |
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* Document property for image cache. |
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*/ |
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private static final String IMAGE_CACHE_PROPERTY = "imageCache"; |
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// Height/width to use before we know the real size, these should at least |
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// the size of <code>sMissingImageIcon</code> and |
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// <code>sPendingImageIcon</code> |
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private static final int DEFAULT_WIDTH = 38; |
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private static final int DEFAULT_HEIGHT= 38; |
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/** |
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* Default border to use if one is not specified. |
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*/ |
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private static final int DEFAULT_BORDER = 2; |
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// Bitmask values |
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private static final int LOADING_FLAG = 1; |
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private static final int LINK_FLAG = 2; |
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private static final int WIDTH_FLAG = 4; |
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private static final int HEIGHT_FLAG = 8; |
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private static final int RELOAD_FLAG = 16; |
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private static final int RELOAD_IMAGE_FLAG = 32; |
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private static final int SYNC_LOAD_FLAG = 64; |
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private AttributeSet attr; |
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private Image image; |
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private Image disabledImage; |
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private int width; |
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private int height; |
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/** Bitmask containing some of the above bitmask values. Because the |
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* image loading notification can happen on another thread access to |
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* this is synchronized (at least for modifying it). */ |
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private int state; |
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private Container container; |
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private Rectangle fBounds; |
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private Color borderColor; |
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// Size of the border, the insets contains this valid. For example, if |
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// the HSPACE attribute was 4 and BORDER 2, leftInset would be 6. |
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private short borderSize; |
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// Insets, obtained from the painter. |
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private short leftInset; |
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private short rightInset; |
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private short topInset; |
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private short bottomInset; |
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/** |
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* We don't directly implement ImageObserver, instead we use an instance |
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* that calls back to us. |
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*/ |
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private ImageObserver imageObserver; |
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/** |
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* Used for alt text. Will be non-null if the image couldn't be found, |
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* and there is valid alt text. |
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*/ |
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private View altView; |
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/** Alignment along the vertical (Y) axis. */ |
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private float vAlign; |
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/** |
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* Creates a new view that represents an IMG element. |
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* |
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* @param elem the element to create a view for |
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*/ |
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public ImageView(Element elem) { |
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super(elem); |
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fBounds = new Rectangle(); |
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imageObserver = new ImageHandler(); |
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state = RELOAD_FLAG | RELOAD_IMAGE_FLAG; |
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} |
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/** |
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* Returns the text to display if the image cannot be loaded. This is |
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* obtained from the Elements attribute set with the attribute name |
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* <code>HTML.Attribute.ALT</code>. |
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* |
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* @return the test to display if the image cannot be loaded. |
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*/ |
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public String getAltText() { |
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return (String)getElement().getAttributes().getAttribute |
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(HTML.Attribute.ALT); |
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} |
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/** |
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* Return a URL for the image source, |
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* or null if it could not be determined. |
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* |
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* @return the URL for the image source, or null if it could not be determined. |
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*/ |
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public URL getImageURL() { |
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String src = (String)getElement().getAttributes(). |
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getAttribute(HTML.Attribute.SRC); |
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if (src == null) { |
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return null; |
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} |
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URL reference = ((HTMLDocument)getDocument()).getBase(); |
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try { |
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URL u = new URL(reference,src); |
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return u; |
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} catch (MalformedURLException e) { |
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return null; |
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} |
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} |
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/** |
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* Returns the icon to use if the image could not be found. |
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* |
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* @return the icon to use if the image could not be found. |
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*/ |
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public Icon getNoImageIcon() { |
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return (Icon) UIManager.getLookAndFeelDefaults().get(MISSING_IMAGE); |
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} |
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/** |
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* Returns the icon to use while in the process of loading the image. |
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* |
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* @return the icon to use while in the process of loading the image. |
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*/ |
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public Icon getLoadingImageIcon() { |
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return (Icon) UIManager.getLookAndFeelDefaults().get(PENDING_IMAGE); |
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} |
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/** |
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* Returns the image to render. |
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* |
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* @return the image to render. |
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*/ |
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public Image getImage() { |
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sync(); |
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return image; |
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} |
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private Image getImage(boolean enabled) { |
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Image img = getImage(); |
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if (! enabled) { |
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if (disabledImage == null) { |
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disabledImage = GrayFilter.createDisabledImage(img); |
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} |
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img = disabledImage; |
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} |
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return img; |
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} |
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/** |
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* Sets how the image is loaded. If <code>newValue</code> is true, |
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* the image will be loaded when first asked for, otherwise it will |
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* be loaded asynchronously. The default is to not load synchronously, |
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* that is to load the image asynchronously. |
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* |
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* @param newValue if {@code true} the image will be loaded when first asked for, |
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* otherwise it will be asynchronously. |
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*/ |
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public void setLoadsSynchronously(boolean newValue) { |
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synchronized(this) { |
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if (newValue) { |
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state |= SYNC_LOAD_FLAG; |
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} |
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else { |
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state = (state | SYNC_LOAD_FLAG) ^ SYNC_LOAD_FLAG; |
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} |
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} |
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} |
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/** |
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* Returns {@code true} if the image should be loaded when first asked for. |
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* |
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* @return {@code true} if the image should be loaded when first asked for. |
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*/ |
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public boolean getLoadsSynchronously() { |
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return ((state & SYNC_LOAD_FLAG) != 0); |
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} |
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/** |
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* Convenient method to get the StyleSheet. |
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* |
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* @return the StyleSheet |
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*/ |
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protected StyleSheet getStyleSheet() { |
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HTMLDocument doc = (HTMLDocument) getDocument(); |
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return doc.getStyleSheet(); |
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} |
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/** |
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* Fetches the attributes to use when rendering. This is |
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* implemented to multiplex the attributes specified in the |
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* model with a StyleSheet. |
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*/ |
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public AttributeSet getAttributes() { |
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sync(); |
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return attr; |
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} |
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/** |
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* For images the tooltip text comes from text specified with the |
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* <code>ALT</code> attribute. This is overriden to return |
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* <code>getAltText</code>. |
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* |
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* @see JTextComponent#getToolTipText |
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*/ |
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public String getToolTipText(float x, float y, Shape allocation) { |
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return getAltText(); |
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} |
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/** |
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* Update any cached values that come from attributes. |
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*/ |
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protected void setPropertiesFromAttributes() { |
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StyleSheet sheet = getStyleSheet(); |
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this.attr = sheet.getViewAttributes(this); |
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// Gutters |
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borderSize = (short)getIntAttr(HTML.Attribute.BORDER, isLink() ? |
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DEFAULT_BORDER : 0); |
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leftInset = rightInset = (short)(getIntAttr(HTML.Attribute.HSPACE, |
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0) + borderSize); |
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topInset = bottomInset = (short)(getIntAttr(HTML.Attribute.VSPACE, |
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0) + borderSize); |
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borderColor = ((StyledDocument)getDocument()).getForeground |
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(getAttributes()); |
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AttributeSet attr = getElement().getAttributes(); |
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// Alignment. |
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// PENDING: This needs to be changed to support the CSS versions |
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// when conversion from ALIGN to VERTICAL_ALIGN is complete. |
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Object alignment = attr.getAttribute(HTML.Attribute.ALIGN); |
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vAlign = 1.0f; |
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if (alignment != null) { |
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alignment = alignment.toString(); |
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if ("top".equals(alignment)) { |
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vAlign = 0f; |
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} |
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else if ("middle".equals(alignment)) { |
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vAlign = .5f; |
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} |
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} |
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AttributeSet anchorAttr = (AttributeSet)attr.getAttribute(HTML.Tag.A); |
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if (anchorAttr != null && anchorAttr.isDefined |
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(HTML.Attribute.HREF)) { |
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synchronized(this) { |
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state |= LINK_FLAG; |
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} |
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} |
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else { |
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synchronized(this) { |
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state = (state | LINK_FLAG) ^ LINK_FLAG; |
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} |
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} |
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} |
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/** |
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* Establishes the parent view for this view. |
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* Seize this moment to cache the AWT Container I'm in. |
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*/ |
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331 |
public void setParent(View parent) { |
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View oldParent = getParent(); |
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super.setParent(parent); |
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container = (parent != null) ? getContainer() : null; |
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if (oldParent != parent) { |
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synchronized(this) { |
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state |= RELOAD_FLAG; |
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} |
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} |
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} |
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/** |
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* Invoked when the Elements attributes have changed. Recreates the image. |
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*/ |
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345 |
public void changedUpdate(DocumentEvent e, Shape a, ViewFactory f) { |
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super.changedUpdate(e,a,f); |
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synchronized(this) { |
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state |= RELOAD_FLAG | RELOAD_IMAGE_FLAG; |
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} |
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// Assume the worst. |
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preferenceChanged(null, true, true); |
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} |
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/** |
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* Paints the View. |
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* |
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* @param g the rendering surface to use |
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* @param a the allocated region to render into |
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* @see View#paint |
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*/ |
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363 |
public void paint(Graphics g, Shape a) { |
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sync(); |
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366 |
Rectangle rect = (a instanceof Rectangle) ? (Rectangle)a : |
|
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a.getBounds(); |
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Rectangle clip = g.getClipBounds(); |
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fBounds.setBounds(rect); |
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paintHighlights(g, a); |
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paintBorder(g, rect); |
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373 |
if (clip != null) { |
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g.clipRect(rect.x + leftInset, rect.y + topInset, |
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rect.width - leftInset - rightInset, |
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rect.height - topInset - bottomInset); |
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} |
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Container host = getContainer(); |
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Image img = getImage(host == null || host.isEnabled()); |
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|
381 |
if (img != null) { |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
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diff
changeset
|
382 |
if (! hasPixels(img)) { |
2 | 383 |
// No pixels yet, use the default |
2493
93a357c96600
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parents:
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diff
changeset
|
384 |
Icon icon = getLoadingImageIcon(); |
2 | 385 |
if (icon != null) { |
2493
93a357c96600
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peterz
parents:
2
diff
changeset
|
386 |
icon.paintIcon(host, g, |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
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diff
changeset
|
387 |
rect.x + leftInset, rect.y + topInset); |
2 | 388 |
} |
389 |
} |
|
390 |
else { |
|
391 |
// Draw the image |
|
2493
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
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diff
changeset
|
392 |
g.drawImage(img, rect.x + leftInset, rect.y + topInset, |
2 | 393 |
width, height, imageObserver); |
394 |
} |
|
395 |
} |
|
396 |
else { |
|
397 |
Icon icon = getNoImageIcon(); |
|
398 |
if (icon != null) { |
|
2493
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
399 |
icon.paintIcon(host, g, |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
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diff
changeset
|
400 |
rect.x + leftInset, rect.y + topInset); |
2 | 401 |
} |
402 |
View view = getAltView(); |
|
403 |
// Paint the view representing the alt text, if its non-null |
|
404 |
if (view != null && ((state & WIDTH_FLAG) == 0 || |
|
405 |
width > DEFAULT_WIDTH)) { |
|
406 |
// Assume layout along the y direction |
|
407 |
Rectangle altRect = new Rectangle |
|
408 |
(rect.x + leftInset + DEFAULT_WIDTH, rect.y + topInset, |
|
409 |
rect.width - leftInset - rightInset - DEFAULT_WIDTH, |
|
410 |
rect.height - topInset - bottomInset); |
|
411 |
||
412 |
view.paint(g, altRect); |
|
413 |
} |
|
414 |
} |
|
415 |
if (clip != null) { |
|
416 |
// Reset clip. |
|
417 |
g.setClip(clip.x, clip.y, clip.width, clip.height); |
|
418 |
} |
|
419 |
} |
|
420 |
||
421 |
private void paintHighlights(Graphics g, Shape shape) { |
|
422 |
if (container instanceof JTextComponent) { |
|
423 |
JTextComponent tc = (JTextComponent)container; |
|
424 |
Highlighter h = tc.getHighlighter(); |
|
425 |
if (h instanceof LayeredHighlighter) { |
|
426 |
((LayeredHighlighter)h).paintLayeredHighlights |
|
427 |
(g, getStartOffset(), getEndOffset(), shape, tc, this); |
|
428 |
} |
|
429 |
} |
|
430 |
} |
|
431 |
||
432 |
private void paintBorder(Graphics g, Rectangle rect) { |
|
433 |
Color color = borderColor; |
|
434 |
||
435 |
if ((borderSize > 0 || image == null) && color != null) { |
|
436 |
int xOffset = leftInset - borderSize; |
|
437 |
int yOffset = topInset - borderSize; |
|
438 |
g.setColor(color); |
|
439 |
int n = (image == null) ? 1 : borderSize; |
|
440 |
for (int counter = 0; counter < n; counter++) { |
|
441 |
g.drawRect(rect.x + xOffset + counter, |
|
442 |
rect.y + yOffset + counter, |
|
443 |
rect.width - counter - counter - xOffset -xOffset-1, |
|
444 |
rect.height - counter - counter -yOffset-yOffset-1); |
|
445 |
} |
|
446 |
} |
|
447 |
} |
|
448 |
||
449 |
/** |
|
450 |
* Determines the preferred span for this view along an |
|
451 |
* axis. |
|
452 |
* |
|
453 |
* @param axis may be either X_AXIS or Y_AXIS |
|
454 |
* @return the span the view would like to be rendered into; |
|
455 |
* typically the view is told to render into the span |
|
456 |
* that is returned, although there is no guarantee; |
|
457 |
* the parent may choose to resize or break the view |
|
458 |
*/ |
|
459 |
public float getPreferredSpan(int axis) { |
|
460 |
sync(); |
|
461 |
||
462 |
// If the attributes specified a width/height, always use it! |
|
463 |
if (axis == View.X_AXIS && (state & WIDTH_FLAG) == WIDTH_FLAG) { |
|
464 |
getPreferredSpanFromAltView(axis); |
|
465 |
return width + leftInset + rightInset; |
|
466 |
} |
|
467 |
if (axis == View.Y_AXIS && (state & HEIGHT_FLAG) == HEIGHT_FLAG) { |
|
468 |
getPreferredSpanFromAltView(axis); |
|
469 |
return height + topInset + bottomInset; |
|
470 |
} |
|
471 |
||
472 |
Image image = getImage(); |
|
473 |
||
474 |
if (image != null) { |
|
475 |
switch (axis) { |
|
476 |
case View.X_AXIS: |
|
477 |
return width + leftInset + rightInset; |
|
478 |
case View.Y_AXIS: |
|
479 |
return height + topInset + bottomInset; |
|
480 |
default: |
|
481 |
throw new IllegalArgumentException("Invalid axis: " + axis); |
|
482 |
} |
|
483 |
} |
|
484 |
else { |
|
485 |
View view = getAltView(); |
|
486 |
float retValue = 0f; |
|
487 |
||
488 |
if (view != null) { |
|
489 |
retValue = view.getPreferredSpan(axis); |
|
490 |
} |
|
491 |
switch (axis) { |
|
492 |
case View.X_AXIS: |
|
493 |
return retValue + (float)(width + leftInset + rightInset); |
|
494 |
case View.Y_AXIS: |
|
495 |
return retValue + (float)(height + topInset + bottomInset); |
|
496 |
default: |
|
497 |
throw new IllegalArgumentException("Invalid axis: " + axis); |
|
498 |
} |
|
499 |
} |
|
500 |
} |
|
501 |
||
502 |
/** |
|
503 |
* Determines the desired alignment for this view along an |
|
504 |
* axis. This is implemented to give the alignment to the |
|
505 |
* bottom of the icon along the y axis, and the default |
|
506 |
* along the x axis. |
|
507 |
* |
|
508 |
* @param axis may be either X_AXIS or Y_AXIS |
|
509 |
* @return the desired alignment; this should be a value |
|
510 |
* between 0.0 and 1.0 where 0 indicates alignment at the |
|
511 |
* origin and 1.0 indicates alignment to the full span |
|
512 |
* away from the origin; an alignment of 0.5 would be the |
|
513 |
* center of the view |
|
514 |
*/ |
|
515 |
public float getAlignment(int axis) { |
|
516 |
switch (axis) { |
|
517 |
case View.Y_AXIS: |
|
518 |
return vAlign; |
|
519 |
default: |
|
520 |
return super.getAlignment(axis); |
|
521 |
} |
|
522 |
} |
|
523 |
||
524 |
/** |
|
525 |
* Provides a mapping from the document model coordinate space |
|
526 |
* to the coordinate space of the view mapped to it. |
|
527 |
* |
|
528 |
* @param pos the position to convert |
|
529 |
* @param a the allocated region to render into |
|
530 |
* @return the bounding box of the given position |
|
531 |
* @exception BadLocationException if the given position does not represent a |
|
532 |
* valid location in the associated document |
|
533 |
* @see View#modelToView |
|
534 |
*/ |
|
535 |
public Shape modelToView(int pos, Shape a, Position.Bias b) throws BadLocationException { |
|
536 |
int p0 = getStartOffset(); |
|
537 |
int p1 = getEndOffset(); |
|
538 |
if ((pos >= p0) && (pos <= p1)) { |
|
539 |
Rectangle r = a.getBounds(); |
|
540 |
if (pos == p1) { |
|
541 |
r.x += r.width; |
|
542 |
} |
|
543 |
r.width = 0; |
|
544 |
return r; |
|
545 |
} |
|
546 |
return null; |
|
547 |
} |
|
548 |
||
549 |
/** |
|
550 |
* Provides a mapping from the view coordinate space to the logical |
|
551 |
* coordinate space of the model. |
|
552 |
* |
|
553 |
* @param x the X coordinate |
|
554 |
* @param y the Y coordinate |
|
555 |
* @param a the allocated region to render into |
|
556 |
* @return the location within the model that best represents the |
|
557 |
* given point of view |
|
558 |
* @see View#viewToModel |
|
559 |
*/ |
|
560 |
public int viewToModel(float x, float y, Shape a, Position.Bias[] bias) { |
|
561 |
Rectangle alloc = (Rectangle) a; |
|
562 |
if (x < alloc.x + alloc.width) { |
|
563 |
bias[0] = Position.Bias.Forward; |
|
564 |
return getStartOffset(); |
|
565 |
} |
|
566 |
bias[0] = Position.Bias.Backward; |
|
567 |
return getEndOffset(); |
|
568 |
} |
|
569 |
||
570 |
/** |
|
571 |
* Sets the size of the view. This should cause |
|
572 |
* layout of the view if it has any layout duties. |
|
573 |
* |
|
20169 | 574 |
* @param width the width >= 0 |
575 |
* @param height the height >= 0 |
|
2 | 576 |
*/ |
577 |
public void setSize(float width, float height) { |
|
578 |
sync(); |
|
579 |
||
580 |
if (getImage() == null) { |
|
581 |
View view = getAltView(); |
|
582 |
||
583 |
if (view != null) { |
|
584 |
view.setSize(Math.max(0f, width - (float)(DEFAULT_WIDTH + leftInset + rightInset)), |
|
585 |
Math.max(0f, height - (float)(topInset + bottomInset))); |
|
586 |
} |
|
587 |
} |
|
588 |
} |
|
589 |
||
590 |
/** |
|
591 |
* Returns true if this image within a link? |
|
592 |
*/ |
|
593 |
private boolean isLink() { |
|
594 |
return ((state & LINK_FLAG) == LINK_FLAG); |
|
595 |
} |
|
596 |
||
597 |
/** |
|
598 |
* Returns true if the passed in image has a non-zero width and height. |
|
599 |
*/ |
|
600 |
private boolean hasPixels(Image image) { |
|
601 |
return image != null && |
|
602 |
(image.getHeight(imageObserver) > 0) && |
|
603 |
(image.getWidth(imageObserver) > 0); |
|
604 |
} |
|
605 |
||
606 |
/** |
|
607 |
* Returns the preferred span of the View used to display the alt text, |
|
608 |
* or 0 if the view does not exist. |
|
609 |
*/ |
|
610 |
private float getPreferredSpanFromAltView(int axis) { |
|
611 |
if (getImage() == null) { |
|
612 |
View view = getAltView(); |
|
613 |
||
614 |
if (view != null) { |
|
615 |
return view.getPreferredSpan(axis); |
|
616 |
} |
|
617 |
} |
|
618 |
return 0f; |
|
619 |
} |
|
620 |
||
621 |
/** |
|
622 |
* Request that this view be repainted. |
|
623 |
* Assumes the view is still at its last-drawn location. |
|
624 |
*/ |
|
625 |
private void repaint(long delay) { |
|
626 |
if (container != null && fBounds != null) { |
|
627 |
container.repaint(delay, fBounds.x, fBounds.y, fBounds.width, |
|
628 |
fBounds.height); |
|
629 |
} |
|
630 |
} |
|
631 |
||
632 |
/** |
|
25148
1026dc322690
8046446: Fix doclint warnings in javax.swing.text.html package
yan
parents:
23010
diff
changeset
|
633 |
* Convenient method for getting an integer attribute from the elements |
2 | 634 |
* AttributeSet. |
635 |
*/ |
|
636 |
private int getIntAttr(HTML.Attribute name, int deflt) { |
|
637 |
AttributeSet attr = getElement().getAttributes(); |
|
638 |
if (attr.isDefined(name)) { // does not check parents! |
|
639 |
int i; |
|
640 |
String val = (String)attr.getAttribute(name); |
|
641 |
if (val == null) { |
|
642 |
i = deflt; |
|
643 |
} |
|
644 |
else { |
|
645 |
try{ |
|
646 |
i = Math.max(0, Integer.parseInt(val)); |
|
647 |
}catch( NumberFormatException x ) { |
|
648 |
i = deflt; |
|
649 |
} |
|
650 |
} |
|
651 |
return i; |
|
652 |
} else |
|
653 |
return deflt; |
|
654 |
} |
|
655 |
||
656 |
/** |
|
657 |
* Makes sure the necessary properties and image is loaded. |
|
658 |
*/ |
|
659 |
private void sync() { |
|
660 |
int s = state; |
|
661 |
if ((s & RELOAD_IMAGE_FLAG) != 0) { |
|
662 |
refreshImage(); |
|
663 |
} |
|
664 |
s = state; |
|
665 |
if ((s & RELOAD_FLAG) != 0) { |
|
666 |
synchronized(this) { |
|
667 |
state = (state | RELOAD_FLAG) ^ RELOAD_FLAG; |
|
668 |
} |
|
669 |
setPropertiesFromAttributes(); |
|
670 |
} |
|
671 |
} |
|
672 |
||
673 |
/** |
|
674 |
* Loads the image and updates the size accordingly. This should be |
|
675 |
* invoked instead of invoking <code>loadImage</code> or |
|
676 |
* <code>updateImageSize</code> directly. |
|
677 |
*/ |
|
678 |
private void refreshImage() { |
|
679 |
synchronized(this) { |
|
680 |
// clear out width/height/realoadimage flag and set loading flag |
|
681 |
state = (state | LOADING_FLAG | RELOAD_IMAGE_FLAG | WIDTH_FLAG | |
|
682 |
HEIGHT_FLAG) ^ (WIDTH_FLAG | HEIGHT_FLAG | |
|
683 |
RELOAD_IMAGE_FLAG); |
|
684 |
image = null; |
|
685 |
width = height = 0; |
|
686 |
} |
|
687 |
||
688 |
try { |
|
689 |
// Load the image |
|
690 |
loadImage(); |
|
691 |
||
692 |
// And update the size params |
|
693 |
updateImageSize(); |
|
694 |
} |
|
695 |
finally { |
|
696 |
synchronized(this) { |
|
697 |
// Clear out state in case someone threw an exception. |
|
698 |
state = (state | LOADING_FLAG) ^ LOADING_FLAG; |
|
699 |
} |
|
700 |
} |
|
701 |
} |
|
702 |
||
703 |
/** |
|
704 |
* Loads the image from the URL <code>getImageURL</code>. This should |
|
705 |
* only be invoked from <code>refreshImage</code>. |
|
706 |
*/ |
|
707 |
private void loadImage() { |
|
708 |
URL src = getImageURL(); |
|
709 |
Image newImage = null; |
|
710 |
if (src != null) { |
|
25193
187a455af8f8
8043549: Fix raw and unchecked lint warnings in javax.swing.text.*
darcy
parents:
23010
diff
changeset
|
711 |
@SuppressWarnings("unchecked") |
187a455af8f8
8043549: Fix raw and unchecked lint warnings in javax.swing.text.*
darcy
parents:
23010
diff
changeset
|
712 |
Dictionary<URL, Image> cache = (Dictionary)getDocument(). |
187a455af8f8
8043549: Fix raw and unchecked lint warnings in javax.swing.text.*
darcy
parents:
23010
diff
changeset
|
713 |
getProperty(IMAGE_CACHE_PROPERTY); |
2 | 714 |
if (cache != null) { |
25193
187a455af8f8
8043549: Fix raw and unchecked lint warnings in javax.swing.text.*
darcy
parents:
23010
diff
changeset
|
715 |
newImage = cache.get(src); |
2 | 716 |
} |
717 |
else { |
|
718 |
newImage = Toolkit.getDefaultToolkit().createImage(src); |
|
719 |
if (newImage != null && getLoadsSynchronously()) { |
|
720 |
// Force the image to be loaded by using an ImageIcon. |
|
721 |
ImageIcon ii = new ImageIcon(); |
|
722 |
ii.setImage(newImage); |
|
723 |
} |
|
724 |
} |
|
725 |
} |
|
726 |
image = newImage; |
|
727 |
} |
|
728 |
||
729 |
/** |
|
730 |
* Recreates and reloads the image. This should |
|
731 |
* only be invoked from <code>refreshImage</code>. |
|
732 |
*/ |
|
733 |
private void updateImageSize() { |
|
734 |
int newWidth = 0; |
|
735 |
int newHeight = 0; |
|
736 |
int newState = 0; |
|
737 |
Image newImage = getImage(); |
|
738 |
||
739 |
if (newImage != null) { |
|
740 |
Element elem = getElement(); |
|
741 |
AttributeSet attr = elem.getAttributes(); |
|
742 |
||
743 |
// Get the width/height and set the state ivar before calling |
|
744 |
// anything that might cause the image to be loaded, and thus the |
|
745 |
// ImageHandler to be called. |
|
746 |
newWidth = getIntAttr(HTML.Attribute.WIDTH, -1); |
|
747 |
if (newWidth > 0) { |
|
748 |
newState |= WIDTH_FLAG; |
|
749 |
} |
|
750 |
newHeight = getIntAttr(HTML.Attribute.HEIGHT, -1); |
|
751 |
if (newHeight > 0) { |
|
752 |
newState |= HEIGHT_FLAG; |
|
753 |
} |
|
754 |
||
755 |
if (newWidth <= 0) { |
|
756 |
newWidth = newImage.getWidth(imageObserver); |
|
757 |
if (newWidth <= 0) { |
|
758 |
newWidth = DEFAULT_WIDTH; |
|
759 |
} |
|
760 |
} |
|
761 |
||
762 |
if (newHeight <= 0) { |
|
763 |
newHeight = newImage.getHeight(imageObserver); |
|
764 |
if (newHeight <= 0) { |
|
765 |
newHeight = DEFAULT_HEIGHT; |
|
766 |
} |
|
767 |
} |
|
768 |
||
769 |
// Make sure the image starts loading: |
|
770 |
if ((newState & (WIDTH_FLAG | HEIGHT_FLAG)) != 0) { |
|
771 |
Toolkit.getDefaultToolkit().prepareImage(newImage, newWidth, |
|
772 |
newHeight, |
|
773 |
imageObserver); |
|
774 |
} |
|
775 |
else { |
|
776 |
Toolkit.getDefaultToolkit().prepareImage(newImage, -1, -1, |
|
777 |
imageObserver); |
|
778 |
} |
|
779 |
||
780 |
boolean createText = false; |
|
781 |
synchronized(this) { |
|
782 |
// If imageloading failed, other thread may have called |
|
783 |
// ImageLoader which will null out image, hence we check |
|
784 |
// for it. |
|
785 |
if (image != null) { |
|
786 |
if ((newState & WIDTH_FLAG) == WIDTH_FLAG || width == 0) { |
|
787 |
width = newWidth; |
|
788 |
} |
|
789 |
if ((newState & HEIGHT_FLAG) == HEIGHT_FLAG || |
|
790 |
height == 0) { |
|
791 |
height = newHeight; |
|
792 |
} |
|
793 |
} |
|
794 |
else { |
|
795 |
createText = true; |
|
796 |
if ((newState & WIDTH_FLAG) == WIDTH_FLAG) { |
|
797 |
width = newWidth; |
|
798 |
} |
|
799 |
if ((newState & HEIGHT_FLAG) == HEIGHT_FLAG) { |
|
800 |
height = newHeight; |
|
801 |
} |
|
802 |
} |
|
803 |
state = state | newState; |
|
804 |
state = (state | LOADING_FLAG) ^ LOADING_FLAG; |
|
805 |
} |
|
806 |
if (createText) { |
|
807 |
// Only reset if this thread determined image is null |
|
808 |
updateAltTextView(); |
|
809 |
} |
|
810 |
} |
|
811 |
else { |
|
812 |
width = height = DEFAULT_HEIGHT; |
|
813 |
updateAltTextView(); |
|
814 |
} |
|
815 |
} |
|
816 |
||
817 |
/** |
|
818 |
* Updates the view representing the alt text. |
|
819 |
*/ |
|
820 |
private void updateAltTextView() { |
|
821 |
String text = getAltText(); |
|
822 |
||
823 |
if (text != null) { |
|
824 |
ImageLabelView newView; |
|
825 |
||
826 |
newView = new ImageLabelView(getElement(), text); |
|
827 |
synchronized(this) { |
|
828 |
altView = newView; |
|
829 |
} |
|
830 |
} |
|
831 |
} |
|
832 |
||
833 |
/** |
|
834 |
* Returns the view to use for alternate text. This may be null. |
|
835 |
*/ |
|
836 |
private View getAltView() { |
|
837 |
View view; |
|
838 |
||
839 |
synchronized(this) { |
|
840 |
view = altView; |
|
841 |
} |
|
842 |
if (view != null && view.getParent() == null) { |
|
843 |
view.setParent(getParent()); |
|
844 |
} |
|
845 |
return view; |
|
846 |
} |
|
847 |
||
848 |
/** |
|
849 |
* Invokes <code>preferenceChanged</code> on the event displatching |
|
850 |
* thread. |
|
851 |
*/ |
|
852 |
private void safePreferenceChanged() { |
|
853 |
if (SwingUtilities.isEventDispatchThread()) { |
|
854 |
Document doc = getDocument(); |
|
855 |
if (doc instanceof AbstractDocument) { |
|
856 |
((AbstractDocument)doc).readLock(); |
|
857 |
} |
|
858 |
preferenceChanged(null, true, true); |
|
859 |
if (doc instanceof AbstractDocument) { |
|
860 |
((AbstractDocument)doc).readUnlock(); |
|
861 |
} |
|
862 |
} |
|
863 |
else { |
|
864 |
SwingUtilities.invokeLater(new Runnable() { |
|
865 |
public void run() { |
|
866 |
safePreferenceChanged(); |
|
867 |
} |
|
868 |
}); |
|
869 |
} |
|
870 |
} |
|
871 |
||
872 |
/** |
|
873 |
* ImageHandler implements the ImageObserver to correctly update the |
|
874 |
* display as new parts of the image become available. |
|
875 |
*/ |
|
876 |
private class ImageHandler implements ImageObserver { |
|
877 |
// This can come on any thread. If we are in the process of reloading |
|
878 |
// the image and determining our state (loading == true) we don't fire |
|
879 |
// preference changed, or repaint, we just reset the fWidth/fHeight as |
|
880 |
// necessary and return. This is ok as we know when loading finishes |
|
881 |
// it will pick up the new height/width, if necessary. |
|
882 |
public boolean imageUpdate(Image img, int flags, int x, int y, |
|
883 |
int newWidth, int newHeight ) { |
|
2493
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
884 |
if (img != image && img != disabledImage || |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
885 |
image == null || getParent() == null) { |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
886 |
|
2 | 887 |
return false; |
888 |
} |
|
889 |
||
890 |
// Bail out if there was an error: |
|
891 |
if ((flags & (ABORT|ERROR)) != 0) { |
|
892 |
repaint(0); |
|
893 |
synchronized(ImageView.this) { |
|
894 |
if (image == img) { |
|
895 |
// Be sure image hasn't changed since we don't |
|
896 |
// initialy synchronize |
|
897 |
image = null; |
|
898 |
if ((state & WIDTH_FLAG) != WIDTH_FLAG) { |
|
899 |
width = DEFAULT_WIDTH; |
|
900 |
} |
|
901 |
if ((state & HEIGHT_FLAG) != HEIGHT_FLAG) { |
|
902 |
height = DEFAULT_HEIGHT; |
|
903 |
} |
|
2493
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
904 |
} else { |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
905 |
disabledImage = null; |
2 | 906 |
} |
907 |
if ((state & LOADING_FLAG) == LOADING_FLAG) { |
|
908 |
// No need to resize or repaint, still in the process |
|
909 |
// of loading. |
|
910 |
return false; |
|
911 |
} |
|
912 |
} |
|
913 |
updateAltTextView(); |
|
914 |
safePreferenceChanged(); |
|
915 |
return false; |
|
916 |
} |
|
917 |
||
2493
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
918 |
if (image == img) { |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
919 |
// Resize image if necessary: |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
920 |
short changed = 0; |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
921 |
if ((flags & ImageObserver.HEIGHT) != 0 && !getElement(). |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
922 |
getAttributes().isDefined(HTML.Attribute.HEIGHT)) { |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
923 |
changed |= 1; |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
924 |
} |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
925 |
if ((flags & ImageObserver.WIDTH) != 0 && !getElement(). |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
926 |
getAttributes().isDefined(HTML.Attribute.WIDTH)) { |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
927 |
changed |= 2; |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
928 |
} |
2 | 929 |
|
2493
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
930 |
synchronized(ImageView.this) { |
49295
8d8f74e84ff6
8195095: Images are not scaled correctly in JEditorPane
kaddepalli
parents:
47216
diff
changeset
|
931 |
if ((changed & 1) == 1 && (state & HEIGHT_FLAG) == 0) { |
8d8f74e84ff6
8195095: Images are not scaled correctly in JEditorPane
kaddepalli
parents:
47216
diff
changeset
|
932 |
height = newHeight; |
2493
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
933 |
} |
49295
8d8f74e84ff6
8195095: Images are not scaled correctly in JEditorPane
kaddepalli
parents:
47216
diff
changeset
|
934 |
if ((changed & 2) == 2 && (state & WIDTH_FLAG) == 0) { |
8d8f74e84ff6
8195095: Images are not scaled correctly in JEditorPane
kaddepalli
parents:
47216
diff
changeset
|
935 |
width = newWidth; |
2493
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
936 |
} |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
937 |
if ((state & LOADING_FLAG) == LOADING_FLAG) { |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
938 |
// No need to resize or repaint, still in the process of |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
939 |
// loading. |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
940 |
return true; |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
941 |
} |
2 | 942 |
} |
2493
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
943 |
if (changed != 0) { |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
944 |
// May need to resize myself, asynchronously: |
93a357c96600
4783068: Components with HTML text should gray out the text when disabled
peterz
parents:
2
diff
changeset
|
945 |
safePreferenceChanged(); |
2 | 946 |
return true; |
947 |
} |
|
948 |
} |
|
949 |
||
950 |
// Repaint when done or when new pixels arrive: |
|
951 |
if ((flags & (FRAMEBITS|ALLBITS)) != 0) { |
|
952 |
repaint(0); |
|
953 |
} |
|
954 |
else if ((flags & SOMEBITS) != 0 && sIsInc) { |
|
955 |
repaint(sIncRate); |
|
956 |
} |
|
957 |
return ((flags & ALLBITS) == 0); |
|
958 |
} |
|
959 |
} |
|
960 |
||
961 |
||
962 |
/** |
|
963 |
* ImageLabelView is used if the image can't be loaded, and |
|
964 |
* the attribute specified an alt attribute. It overriden a handle of |
|
965 |
* methods as the text is hardcoded and does not come from the document. |
|
966 |
*/ |
|
967 |
private class ImageLabelView extends InlineView { |
|
968 |
private Segment segment; |
|
969 |
private Color fg; |
|
970 |
||
971 |
ImageLabelView(Element e, String text) { |
|
972 |
super(e); |
|
973 |
reset(text); |
|
974 |
} |
|
975 |
||
976 |
public void reset(String text) { |
|
977 |
segment = new Segment(text.toCharArray(), 0, text.length()); |
|
978 |
} |
|
979 |
||
980 |
public void paint(Graphics g, Shape a) { |
|
981 |
// Don't use supers paint, otherwise selection will be wrong |
|
982 |
// as our start/end offsets are fake. |
|
983 |
GlyphPainter painter = getGlyphPainter(); |
|
984 |
||
985 |
if (painter != null) { |
|
986 |
g.setColor(getForeground()); |
|
987 |
painter.paint(this, g, a, getStartOffset(), getEndOffset()); |
|
988 |
} |
|
989 |
} |
|
990 |
||
991 |
public Segment getText(int p0, int p1) { |
|
992 |
if (p0 < 0 || p1 > segment.array.length) { |
|
993 |
throw new RuntimeException("ImageLabelView: Stale view"); |
|
994 |
} |
|
995 |
segment.offset = p0; |
|
996 |
segment.count = p1 - p0; |
|
997 |
return segment; |
|
998 |
} |
|
999 |
||
1000 |
public int getStartOffset() { |
|
1001 |
return 0; |
|
1002 |
} |
|
1003 |
||
1004 |
public int getEndOffset() { |
|
1005 |
return segment.array.length; |
|
1006 |
} |
|
1007 |
||
1008 |
public View breakView(int axis, int p0, float pos, float len) { |
|
1009 |
// Don't allow a break |
|
1010 |
return this; |
|
1011 |
} |
|
1012 |
||
1013 |
public Color getForeground() { |
|
1014 |
View parent; |
|
1015 |
if (fg == null && (parent = getParent()) != null) { |
|
1016 |
Document doc = getDocument(); |
|
1017 |
AttributeSet attr = parent.getAttributes(); |
|
1018 |
||
1019 |
if (attr != null && (doc instanceof StyledDocument)) { |
|
1020 |
fg = ((StyledDocument)doc).getForeground(attr); |
|
1021 |
} |
|
1022 |
} |
|
1023 |
return fg; |
|
1024 |
} |
|
1025 |
} |
|
1026 |
} |