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com.viaoa.jfc.editor.html.view.MyImageView Maven / Gradle / Ivy

/*
 * @(#)ImageView.java   1.58 05/11/30
 *
 * Copyright 2006 Sun Microsystems, Inc. All rights reserved.
 * SUN PROPRIETARY/CONFIDENTIAL. Use is subject to license terms.
 */
package com.viaoa.jfc.editor.html.view;

import java.awt.*;
import java.awt.event.*;
import java.awt.image.ImageObserver;
import java.io.*;
import java.net.*;
import java.util.Dictionary;
import javax.swing.*;
import javax.swing.text.*;
import javax.swing.text.html.CSS;
import javax.swing.text.html.HTML;
import javax.swing.text.html.HTMLDocument;
import javax.swing.text.html.InlineView;
import javax.swing.text.html.StyleSheet;
import javax.swing.event.*;

import com.viaoa.jfc.image.OAImageUtil;
import com.viaoa.util.OAConv;


/*** vv 
 *  Copied from ImageView
 * 
 *  Goals for changes:
 *  
    *
  • allow for loading using File name/path *
  • allow for scale size when printing images that are larger then page width/height *
*/ /** * View of an Image, intended to support the HTML <IMG> tag. Supports * scaling via the HEIGHT and WIDTH attributes of the tag. If the image is * unable to be loaded any text specified via the ALT attribute * will be rendered. *

* While this class has been part of swing for a while now, it is public as of * 1.4. * * @author Scott Violet * @version 1.58 11/30/05 * @see IconView * @since 1.4 */ public abstract class MyImageView extends View { // vv public float scale; /** * If true, when some of the bits are available a repaint is done. *

* This is set to false as swing does not offer a repaint that takes a * delay. If this were true, a bunch of immediate repaints would get * generated that end up significantly delaying the loading of the image (or * anything else going on for that matter). */ private static boolean sIsInc = false; /** * Repaint delay when some of the bits are available. */ private static int sIncRate = 100; /** * Property name for pending image icon */ private static final String PENDING_IMAGE = "html.pendingImage"; /** * Property name for missing image icon */ private static final String MISSING_IMAGE = "html.missingImage"; /** * Document property for image cache. */ private static final String IMAGE_CACHE_PROPERTY = "imageCache"; // Height/width to use before we know the real size, these should at least // the size of sMissingImageIcon and // sPendingImageIcon private static final int DEFAULT_WIDTH = 38; private static final int DEFAULT_HEIGHT = 38; /** * Default border to use if one is not specified. */ private static final int DEFAULT_BORDER = 2; // Bitmask values private static final int LOADING_FLAG = 1; private static final int LINK_FLAG = 2; private static final int WIDTH_FLAG = 4; private static final int HEIGHT_FLAG = 8; private static final int RELOAD_FLAG = 16; private static final int RELOAD_IMAGE_FLAG = 32; private static final int SYNC_LOAD_FLAG = 64; private AttributeSet attr; private Image image; private int width; private int height; /** * Bitmask containing some of the above bitmask values. Because the image * loading notification can happen on another thread access to this is * synchronized (at least for modifying it). */ private int state; private Container container; private Rectangle fBounds; private Color borderColor; // Size of the border, the insets contains this valid. For example, if // the HSPACE attribute was 4 and BORDER 2, leftInset would be 6. private short borderSize; // Insets, obtained from the painter. private short leftInset; private short rightInset; private short topInset; private short bottomInset; /** * We don't directly implement ImageObserver, instead we use an instance * that calls back to us. */ private ImageObserver imageObserver; /** * Used for alt text. Will be non-null if the image couldn't be found, and * there is valid alt text. */ private View altView; /** Alignment along the vertical (Y) axis. */ private float vAlign; //vv protected PrintBoxView getPrintBoxView(View view) { if (view == null || view instanceof PrintBoxView) return (PrintBoxView) view; return getPrintBoxView(view.getParent()); } /** * Creates a new view that represents an IMG element. * * @param elem * the element to create a view for */ public MyImageView(Element elem) { super(elem); // vv setLoadsSynchronously(true); fBounds = new Rectangle(); imageObserver = new ImageHandler(); state = RELOAD_FLAG | RELOAD_IMAGE_FLAG; } /** * Returns the text to display if the image can't be loaded. This is * obtained from the Elements attribute set with the attribute name * HTML.Attribute.ALT. */ public String getAltText() { return (String) getElement().getAttributes().getAttribute( HTML.Attribute.ALT); } // vv public URL getImageURL() { String src = (String)getElement().getAttributes().getAttribute(HTML.Attribute.SRC); if (src == null) { return null; } try { if (!src.toLowerCase().startsWith("file:/")) { File file = new File(src); if (file.exists()) { return file.toURI().toURL(); } } URL url = new URL(src); return url; } catch (Exception e) { int xx = 4; } return getImageURL_Orig(); } /** * Return a URL for the image source, or null if it could not be determined. */ public URL getImageURL_Orig() { String src = (String) getElement().getAttributes().getAttribute( HTML.Attribute.SRC); if (src == null) { return null; } URL reference = ((HTMLDocument) getDocument()).getBase(); try { URL u = new URL(reference, src); return u; } catch (MalformedURLException e) { return null; } } /** * Returns the icon to use if the image couldn't be found. */ public Icon getNoImageIcon() { return (Icon) UIManager.getLookAndFeelDefaults().get(MISSING_IMAGE); } /** * Returns the icon to use while in the process of loading the image. */ public Icon getLoadingImageIcon() { return (Icon) UIManager.getLookAndFeelDefaults().get(PENDING_IMAGE); } /** * Returns the image to render. */ public Image getImage() { sync(); return image; } // vv Called by OAHTMLTextPaneController.onEditImage() public void setImage(Image img) { if (img != null) OAImageUtil.loadImage(img); this.image = img; width = image == null ? 0 : image.getWidth(null); height = image == null ? 0 : img.getHeight(null); scale = 0f; Dictionary cache = (Dictionary) getDocument().getProperty(IMAGE_CACHE_PROPERTY); if (cache != null) { URL src = getImageURL(); if (src != null) { if (img != null) cache.put(src, img); else cache.remove(src); } } View parent = getParent(); if (parent != null) { parent.preferenceChanged(this, true, true); } } /** * Sets how the image is loaded. If newValue is true, the image * we be loaded when first asked for, otherwise it will be loaded * asynchronously. The default is to not load synchronously, that is to load * the image asynchronously. */ public void setLoadsSynchronously(boolean newValue) { synchronized (this) { if (newValue) { state |= SYNC_LOAD_FLAG; } else { state = (state | SYNC_LOAD_FLAG) ^ SYNC_LOAD_FLAG; } } } /** * Returns true if the image should be loaded when first asked for. */ public boolean getLoadsSynchronously() { return ((state & SYNC_LOAD_FLAG) != 0); } /** * Convenience method to get the StyleSheet. */ protected StyleSheet getStyleSheet() { HTMLDocument doc = (HTMLDocument) getDocument(); return doc.getStyleSheet(); } /** * Fetches the attributes to use when rendering. This is implemented to * multiplex the attributes specified in the model with a StyleSheet. */ public AttributeSet getAttributes() { sync(); return attr; } /** * For images the tooltip text comes from text specified with the * ALT attribute. This is overriden to return * getAltText. * * @see JTextComponent#getToolTipText */ public String getToolTipText(float x, float y, Shape allocation) { return getAltText(); } /** * Update any cached values that come from attributes. */ protected void setPropertiesFromAttributes() { StyleSheet sheet = getStyleSheet(); this.attr = sheet.getViewAttributes(this); // Gutters borderSize = (short) getIntAttr(HTML.Attribute.BORDER, isLink() ? DEFAULT_BORDER : 0); leftInset = rightInset = (short) (getIntAttr(HTML.Attribute.HSPACE, 0) + borderSize); topInset = bottomInset = (short) (getIntAttr(HTML.Attribute.VSPACE, 0) + borderSize); borderColor = ((StyledDocument) getDocument()) .getForeground(getAttributes()); AttributeSet attr = getElement().getAttributes(); // Alignment. // PENDING: This needs to be changed to support the CSS versions // when conversion from ALIGN to VERTICAL_ALIGN is complete. Object alignment = attr.getAttribute(HTML.Attribute.ALIGN); vAlign = 1.0f; if (alignment != null) { alignment = alignment.toString(); if ("top".equals(alignment)) { vAlign = 0f; } else if ("middle".equals(alignment)) { vAlign = .5f; } } AttributeSet anchorAttr = (AttributeSet) attr.getAttribute(HTML.Tag.A); if (anchorAttr != null && anchorAttr.isDefined(HTML.Attribute.HREF)) { synchronized (this) { state |= LINK_FLAG; } } else { synchronized (this) { state = (state | LINK_FLAG) ^ LINK_FLAG; } } } /** * Establishes the parent view for this view. Seize this moment to cache the * AWT Container I'm in. */ public void setParent(View parent) { View oldParent = getParent(); super.setParent(parent); container = (parent != null) ? getContainer() : null; if (oldParent != parent) { synchronized (this) { state |= RELOAD_FLAG; } } } /** * Invoked when the Elements attributes have changed. Recreates the image. */ public void changedUpdate(DocumentEvent e, Shape a, ViewFactory f) { super.changedUpdate(e, a, f); synchronized (this) { state |= RELOAD_FLAG | RELOAD_IMAGE_FLAG; } // Assume the worst. preferenceChanged(null, true, true); } /** * Paints the View. * * @param g * the rendering surface to use * @param a * the allocated region to render into * @see View#paint */ public void paint(Graphics g, Shape a) { sync(); Rectangle rect = (a instanceof Rectangle) ? (Rectangle) a : a .getBounds(); getImage(); Rectangle clip = g.getClipBounds(); fBounds.setBounds(rect); paintHighlights(g, a); paintBorder(g, rect); if (clip != null) { g.clipRect(rect.x + leftInset, rect.y + topInset, rect.width - leftInset - rightInset, rect.height - topInset - bottomInset); } if (image != null) { if (!hasPixels(image)) { // No pixels yet, use the default Icon icon = (image == null) ? getNoImageIcon() : getLoadingImageIcon(); if (icon != null) { icon.paintIcon(getContainer(), g, rect.x + leftInset, rect.y + topInset); } } else { // Draw the image getScale(); //vv: make sure that it is refreshed g.drawImage(image, rect.x + leftInset, rect.y + topInset,(int)(width*scale), (int)(height*scale), imageObserver); /*qqqqqqqqqqqqqqqqqqq Graphics2D gd = (Graphics2D) g; gd.setColor(Color.blue);//qqqqqqqqqqqqqqqq gd.setStroke(new BasicStroke(3.0f)); //gd.fillRect(rect.x + leftInset, rect.y + topInset,(int)(width), (int)(height)); gd.setColor(Color.green);//qqqqqqqqqqqqqqqq gd.drawLine(rect.x,(int)(rect.y + topInset+height)-3,1550,(int)(rect.y + topInset+height)-3); */ } } else { Icon icon = getNoImageIcon(); if (icon != null) { icon.paintIcon(getContainer(), g, rect.x + leftInset, rect.y + topInset); } View view = getAltView(); // Paint the view representing the alt text, if its non-null if (view != null && ((state & WIDTH_FLAG) == 0 || width > DEFAULT_WIDTH)) { // Assume layout along the y direction Rectangle altRect = new Rectangle(rect.x + leftInset + DEFAULT_WIDTH, rect.y + topInset, rect.width - leftInset - rightInset - DEFAULT_WIDTH, rect.height - topInset - bottomInset); view.paint(g, altRect); } } if (clip != null) { // Reset clip. g.setClip(clip.x, clip.y, clip.width, clip.height); } } private void paintHighlights(Graphics g, Shape shape) { if (container instanceof JTextComponent) { JTextComponent tc = (JTextComponent) container; Highlighter h = tc.getHighlighter(); if (h instanceof LayeredHighlighter) { ((LayeredHighlighter) h).paintLayeredHighlights(g, getStartOffset(), getEndOffset(), shape, tc, this); } } } private void paintBorder(Graphics g, Rectangle rect) { Color color = borderColor; if ((borderSize > 0 || image == null) && color != null) { int xOffset = leftInset - borderSize; int yOffset = topInset - borderSize; g.setColor(color); int n = (image == null) ? 1 : borderSize; for (int counter = 0; counter < n; counter++) { g.drawRect(rect.x + xOffset + counter, rect.y + yOffset + counter, rect.width - counter - counter - xOffset - xOffset - 1, rect.height - counter - counter - yOffset - yOffset - 1); } } } //vv protected float getScale() { if (scale != 0.0) return scale; if (image == null) return 1.0f; scale = 1.0f; try { String s; // the height/width attributes will be in CSS Object objx = getElement().getAttributes().getAttribute(CSS.Attribute.WIDTH); if (objx != null) { s = objx.toString(); int pos = s.indexOf('%'); if (pos > 0) s = s.substring(0,pos); s = s.trim(); int x = OAConv.toInt(s); if (x > 0) { if (pos > 0) scale = Math.min(scale, x / 100.0f); else scale = Math.min(scale, (float)x/(float)width); } } objx = getElement().getAttributes().getAttribute(CSS.Attribute.HEIGHT); if (objx != null) { s = objx.toString(); int pos = s.indexOf('%'); if (pos > 0) s = s.substring(0,pos); s = s.trim(); int x = OAConv.toInt(s); if (x > 0) { if (pos > 0) scale = Math.min(scale, x / 100.0f); else scale = Math.min(scale, (float)x/(float)height); } } } catch (Throwable t) { System.out.println("MyImageView.getScale exception:"+t+", will use 1.0");//qqqqqqq scale = 1.0f; } int w, h; PrintBoxView pbView = getPrintBoxView(this); if (pbView != null) { w = pbView.getPageWidth(); h = pbView.getPageHeight(); } else w = h = 0; if (w > 0.0f) scale = Math.min(scale, (float)w/(float)width); if (h > 0.0f) scale = Math.min(scale, (float)h/(float)height); scale = Math.min(scale, 1.0f); return scale; } /** * Determines the preferred span for this view along an axis. * * @param axis * may be either X_AXIS or Y_AXIS * @return the span the view would like to be rendered into; typically the * view is told to render into the span that is returned, although * there is no guarantee; the parent may choose to resize or break * the view */ public float getPreferredSpan(int axis) { sync(); getScale(); //vv: make sure that it is refreshed // If the attributes specified a width/height, always use it! if (axis == View.X_AXIS && (state & WIDTH_FLAG) == WIDTH_FLAG) { getPreferredSpanFromAltView(axis); return (width + leftInset + rightInset) * scale; } if (axis == View.Y_AXIS && (state & HEIGHT_FLAG) == HEIGHT_FLAG) { getPreferredSpanFromAltView(axis); return (height + topInset + bottomInset) * scale; } getImage(); if (image != null) { switch (axis) { case View.X_AXIS: return (width + leftInset + rightInset) * scale; case View.Y_AXIS: return (height + topInset + bottomInset) * scale; default: throw new IllegalArgumentException("Invalid axis: " + axis); } } else { View view = getAltView(); float retValue = 0f; if (view != null) { retValue = view.getPreferredSpan(axis); } switch (axis) { case View.X_AXIS: return retValue + (float) (width + leftInset + rightInset); case View.Y_AXIS: return retValue + (float) (height + topInset + bottomInset); default: throw new IllegalArgumentException("Invalid axis: " + axis); } } } /** * Determines the desired alignment for this view along an axis. This is * implemented to give the alignment to the bottom of the icon along the y * axis, and the default along the x axis. * * @param axis * may be either X_AXIS or Y_AXIS * @return the desired alignment; this should be a value between 0.0 and 1.0 * where 0 indicates alignment at the origin and 1.0 indicates * alignment to the full span away from the origin; an alignment of * 0.5 would be the center of the view */ public float getAlignment(int axis) { switch (axis) { case View.Y_AXIS: return vAlign; default: return super.getAlignment(axis); } } /** * Provides a mapping from the document model coordinate space to the * coordinate space of the view mapped to it. * * @param pos * the position to convert * @param a * the allocated region to render into * @return the bounding box of the given position * @exception BadLocationException * if the given position does not represent a valid location * in the associated document * @see View#modelToView */ public Shape modelToView(int pos, Shape a, Position.Bias b) throws BadLocationException { int p0 = getStartOffset(); int p1 = getEndOffset(); if ((pos >= p0) && (pos <= p1)) { Rectangle r = a.getBounds(); if (pos == p1) { r.x += r.width; } r.width = 0; return r; } return null; } /** * Provides a mapping from the view coordinate space to the logical * coordinate space of the model. * * @param x * the X coordinate * @param y * the Y coordinate * @param a * the allocated region to render into * @return the location within the model that best represents the given * point of view * @see View#viewToModel */ public int viewToModel(float x, float y, Shape a, Position.Bias[] bias) { Rectangle alloc = (Rectangle) a; if (x < alloc.x + alloc.width) { bias[0] = Position.Bias.Forward; return getStartOffset(); } bias[0] = Position.Bias.Backward; return getEndOffset(); } /** * Sets the size of the view. This should cause layout of the view if it has * any layout duties. * * @param width * the width >= 0 * @param height * the height >= 0 */ public void setSize(float width, float height) { sync(); if (getImage() == null) { View view = getAltView(); if (view != null) { view .setSize( Math .max( 0f, width - (float) (DEFAULT_WIDTH + leftInset + rightInset)), Math.max(0f, height - (float) (topInset + bottomInset))); } } } /** * Returns true if this image within a link? */ private boolean isLink() { return ((state & LINK_FLAG) == LINK_FLAG); } /** * Returns true if the passed in image has a non-zero width and height. */ private boolean hasPixels(Image image) { return image != null && (image.getHeight(imageObserver) > 0) && (image.getWidth(imageObserver) > 0); } /** * Returns the preferred span of the View used to display the alt text, or 0 * if the view does not exist. */ private float getPreferredSpanFromAltView(int axis) { if (getImage() == null) { View view = getAltView(); if (view != null) { return view.getPreferredSpan(axis); } } return 0f; } /** * Request that this view be repainted. Assumes the view is still at its * last-drawn location. */ private void repaint(long delay) { if (container != null && fBounds != null) { container.repaint(delay, fBounds.x, fBounds.y, fBounds.width, fBounds.height); } } /** * Convenience method for getting an integer attribute from the elements * AttributeSet. */ private int getIntAttr(HTML.Attribute name, int deflt) { AttributeSet attr = getElement().getAttributes(); if (attr.isDefined(name)) { // does not check parents! int i; String val = (String) attr.getAttribute(name); if (val == null) { i = deflt; } else { try { i = Math.max(0, Integer.parseInt(val)); } catch (NumberFormatException x) { i = deflt; } } return i; } else return deflt; } /** * Makes sure the necessary properties and image is loaded. */ private void sync() { int s = state; if ((s & RELOAD_IMAGE_FLAG) != 0) { sync2(); } s = state; if ((s & RELOAD_FLAG) != 0) { synchronized (this) { state = (state | RELOAD_FLAG) ^ RELOAD_FLAG; } setPropertiesFromAttributes(); } } /** * Loads the image and updates the size accordingly. This should be invoked * instead of invoking loadImage or * updateImageSize directly. */ private void sync2() { synchronized (this) { // clear out width/height/realoadimage flag and set loading flag state = (state | LOADING_FLAG | RELOAD_IMAGE_FLAG | WIDTH_FLAG | HEIGHT_FLAG) ^ (WIDTH_FLAG | HEIGHT_FLAG | RELOAD_IMAGE_FLAG); image = null; width = height = 0; scale = 0; //vv this will cause "scale" to be reset. } try { // Load the image sync3(); // And update the size params updateImageSize(); } finally { synchronized (this) { // Clear out state in case someone threw an exception. state = (state | LOADING_FLAG) ^ LOADING_FLAG; } } } /** vv modified to use "hook" to get image * Loads the image from the URL getImageURL. This should only * be invoked from refreshImage. */ private void sync3() { width = height = 0; scale = 0; URL src = getImageURL(); Image newImage = null; if (src != null) { Dictionary cache = (Dictionary) getDocument().getProperty(IMAGE_CACHE_PROPERTY); if (cache != null) { newImage = (Image) cache.get(src); } if (newImage == null) { //System.out.println("MyImageView, call getImage:"+src); String hsrc = (String)getElement().getAttributes().getAttribute(HTML.Attribute.SRC); newImage = getImage(hsrc, src); if (cache != null && newImage != null) cache.put(src, newImage); //vv added } } if (newImage != null) OAImageUtil.loadImage(newImage); image = newImage; } // vv so that this can be overwritten /** * This is a hook to supply an image. If this returns null, * then the myImageView will directly get the image. */ protected abstract Image getImage(String src, URL url); /** * Recreates and reloads the image. This should only be invoked from * refreshImage. */ private void updateImageSize() { int newWidth = 0; int newHeight = 0; int newState = 0; Image newImage = getImage(); if (newImage != null) { Element elem = getElement(); // Get the width/height and set the state ivar before calling // anything that might cause the image to be loaded, and thus the // ImageHandler to be called. newWidth = getIntAttr(HTML.Attribute.WIDTH, -1); if (newWidth > 0) { newState |= WIDTH_FLAG; } newHeight = getIntAttr(HTML.Attribute.HEIGHT, -1); if (newHeight > 0) { newState |= HEIGHT_FLAG; } if (newWidth <= 0) { newWidth = newImage.getWidth(imageObserver); if (newWidth <= 0) { newWidth = DEFAULT_WIDTH; } } if (newHeight <= 0) { newHeight = newImage.getHeight(imageObserver); if (newHeight <= 0) { newHeight = DEFAULT_HEIGHT; } } // Make sure the image starts loading: if ((newState & (WIDTH_FLAG | HEIGHT_FLAG)) != 0) { Toolkit.getDefaultToolkit().prepareImage(newImage, newWidth, newHeight, imageObserver); } else { Toolkit.getDefaultToolkit().prepareImage(newImage, -1, -1, imageObserver); } boolean createText = false; synchronized (this) { // If imageloading failed, other thread may have called // ImageLoader which will null out image, hence we check // for it. if (image != null) { if ((newState & WIDTH_FLAG) == WIDTH_FLAG || width == 0) { width = newWidth; } if ((newState & HEIGHT_FLAG) == HEIGHT_FLAG || height == 0) { height = newHeight; } } else { createText = true; if ((newState & WIDTH_FLAG) == WIDTH_FLAG) { width = newWidth; } if ((newState & HEIGHT_FLAG) == HEIGHT_FLAG) { height = newHeight; } } state = state | newState; state = (state | LOADING_FLAG) ^ LOADING_FLAG; } if (createText) { // Only reset if this thread determined image is null updateAltTextView(); } } else { width = height = DEFAULT_HEIGHT; updateAltTextView(); } } /** * Updates the view representing the alt text. */ private void updateAltTextView() { String text = getAltText(); if (text != null) { ImageLabelView newView; newView = new ImageLabelView(getElement(), text); synchronized (this) { altView = newView; } } } /** * Returns the view to use for alternate text. This may be null. */ private View getAltView() { View view; synchronized (this) { view = altView; } if (view != null && view.getParent() == null) { view.setParent(getParent()); } return view; } /** * Invokes preferenceChanged on the event displatching thread. */ private void safePreferenceChanged() { if (SwingUtilities.isEventDispatchThread()) { Document doc = getDocument(); if (doc instanceof AbstractDocument) { ((AbstractDocument) doc).readLock(); } preferenceChanged(null, true, true); if (doc instanceof AbstractDocument) { ((AbstractDocument) doc).readUnlock(); } } else { SwingUtilities.invokeLater(new Runnable() { public void run() { safePreferenceChanged(); } }); } } /** * ImageHandler implements the ImageObserver to correctly update the display * as new parts of the image become available. */ private class ImageHandler implements ImageObserver { // This can come on any thread. If we are in the process of reloading // the image and determining our state (loading == true) we don't fire // preference changed, or repaint, we just reset the fWidth/fHeight as // necessary and return. This is ok as we know when loading finishes // it will pick up the new height/width, if necessary. public boolean imageUpdate(Image img, int flags, int x, int y, int newWidth, int newHeight) { if (image == null || image != img || getParent() == null) { return false; } // Bail out if there was an error: if ((flags & (ABORT | ERROR)) != 0) { repaint(0); synchronized (MyImageView.this) { if (image == img) { // Be sure image hasn't changed since we don't // initialy synchronize image = null; if ((state & WIDTH_FLAG) != WIDTH_FLAG) { width = DEFAULT_WIDTH; } if ((state & HEIGHT_FLAG) != HEIGHT_FLAG) { height = DEFAULT_HEIGHT; } } if ((state & LOADING_FLAG) == LOADING_FLAG) { // No need to resize or repaint, still in the process // of loading. return false; } } updateAltTextView(); safePreferenceChanged(); return false; } // Resize image if necessary: short changed = 0; if ((flags & ImageObserver.HEIGHT) != 0 && !getElement().getAttributes().isDefined( HTML.Attribute.HEIGHT)) { changed |= 1; } if ((flags & ImageObserver.WIDTH) != 0 && !getElement().getAttributes().isDefined( HTML.Attribute.WIDTH)) { changed |= 2; } synchronized (MyImageView.this) { if (image != img) { return false; } if ((changed & 1) == 1 && (state & WIDTH_FLAG) == 0) { width = newWidth; } if ((changed & 2) == 2 && (state & HEIGHT_FLAG) == 0) { height = newHeight; } if ((state & LOADING_FLAG) == LOADING_FLAG) { // No need to resize or repaint, still in the process of // loading. return true; } } if (changed != 0) { // May need to resize myself, asynchronously: safePreferenceChanged(); return true; } // Repaint when done or when new pixels arrive: if ((flags & (FRAMEBITS | ALLBITS)) != 0) { repaint(0); } else if ((flags & SOMEBITS) != 0 && sIsInc) { repaint(sIncRate); } return ((flags & ALLBITS) == 0); } } /** * ImageLabelView is used if the image can't be loaded, and the attribute * specified an alt attribute. It overriden a handle of methods as the text * is hardcoded and does not come from the document. */ private class ImageLabelView extends InlineView { private Segment segment; private Color fg; ImageLabelView(Element e, String text) { super(e); reset(text); } public void reset(String text) { segment = new Segment(text.toCharArray(), 0, text.length()); } public void paint(Graphics g, Shape a) { // Don't use supers paint, otherwise selection will be wrong // as our start/end offsets are fake. GlyphPainter painter = getGlyphPainter(); if (painter != null) { g.setColor(getForeground()); painter.paint(this, g, a, getStartOffset(), getEndOffset()); } } public Segment getText(int p0, int p1) { if (p0 < 0 || p1 > segment.array.length) { throw new RuntimeException("ImageLabelView: Stale view"); } segment.offset = p0; segment.count = p1 - p0; return segment; } public int getStartOffset() { return 0; } public int getEndOffset() { return segment.array.length; } public View breakView(int axis, int p0, float pos, float len) { // Don't allow a break return this; } public Color getForeground() { View parent; if (fg == null && (parent = getParent()) != null) { Document doc = getDocument(); AttributeSet attr = parent.getAttributes(); if (attr != null && (doc instanceof StyledDocument)) { fg = ((StyledDocument) doc).getForeground(attr); } } return fg; } } }





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