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Diffstat (limited to 'libjava/classpath/javax/swing/text/ComponentView.java')
| -rw-r--r-- | libjava/classpath/javax/swing/text/ComponentView.java | 494 |
1 files changed, 0 insertions, 494 deletions
diff --git a/libjava/classpath/javax/swing/text/ComponentView.java b/libjava/classpath/javax/swing/text/ComponentView.java deleted file mode 100644 index 3680b42..0000000 --- a/libjava/classpath/javax/swing/text/ComponentView.java +++ /dev/null @@ -1,494 +0,0 @@ -/* ComponentView.java -- - Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc. - -This file is part of GNU Classpath. - -GNU Classpath is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU Classpath is distributed in the hope that it will be useful, but -WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU -General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU Classpath; see the file COPYING. If not, write to the -Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA -02110-1301 USA. - -Linking this library statically or dynamically with other modules is -making a combined work based on this library. Thus, the terms and -conditions of the GNU General Public License cover the whole -combination. - -As a special exception, the copyright holders of this library give you -permission to link this library with independent modules to produce an -executable, regardless of the license terms of these independent -modules, and to copy and distribute the resulting executable under -terms of your choice, provided that you also meet, for each linked -independent module, the terms and conditions of the license of that -module. An independent module is a module which is not derived from -or based on this library. If you modify this library, you may extend -this exception to your version of the library, but you are not -obligated to do so. If you do not wish to do so, delete this -exception statement from your version. */ - -package javax.swing.text; - -import java.awt.Component; -import java.awt.Container; -import java.awt.Dimension; -import java.awt.Graphics; -import java.awt.Rectangle; -import java.awt.Shape; - -import javax.swing.SwingUtilities; - -/** - * A {@link View} implementation that is able to render arbitrary - * {@link Component}s. This uses the attribute - * {@link StyleConstants#ComponentAttribute} to determine the - * <code>Component</code> that should be rendered. This <code>Component</code> - * becomes a direct child of the <code>JTextComponent</code> that contains - * this <code>ComponentView</code>, so this view must not be shared between - * multiple <code>JTextComponent</code>s. - * - * @author Roman Kennke (kennke@aicas.com) - * @author original author unknown - */ -public class ComponentView extends View -{ - - /** - * A special container that sits between the component and the hosting - * container. This is used to propagate invalidate requests and cache - * the component's layout sizes. - */ - private class Interceptor - extends Container - { - Dimension min; - Dimension pref; - Dimension max; - float alignX; - float alignY; - - /** - * Creates a new instance that hosts the specified component. - */ - Interceptor(Component c) - { - setLayout(null); - add(c); - cacheComponentSizes(); - } - - /** - * Intercepts the normal invalidate call and propagates the invalidate - * request up using the View's preferenceChanged(). - */ - public void invalidate() - { - super.invalidate(); - if (getParent() != null) - preferenceChanged(null, true, true); - } - - /** - * This is overridden to simply cache the layout sizes. - */ - public void doLayout() - { - cacheComponentSizes(); - } - - /** - * Overridden to also reshape the component itself. - */ - public void reshape(int x, int y, int w, int h) - { - super.reshape(x, y, w, h); - if (getComponentCount() > 0) - getComponent(0).setSize(w, h); - cacheComponentSizes(); - } - - /** - * Overridden to also show the component. - */ - public void show() - { - super.show(); - if (getComponentCount() > 0) - getComponent(0).setVisible(true); - } - - /** - * Overridden to also hide the component. - */ - public void hide() - { - super.hide(); - if (getComponentCount() > 0) - getComponent(0).setVisible(false); - } - - /** - * Overridden to return the cached value. - */ - public Dimension getMinimumSize() - { - maybeValidate(); - return min; - } - - /** - * Overridden to return the cached value. - */ - public Dimension getPreferredSize() - { - maybeValidate(); - return pref; - } - - /** - * Overridden to return the cached value. - */ - public Dimension getMaximumSize() - { - maybeValidate(); - return max; - } - - /** - * Overridden to return the cached value. - */ - public float getAlignmentX() - { - maybeValidate(); - return alignX; - } - - /** - * Overridden to return the cached value. - */ - public float getAlignmentY() - { - maybeValidate(); - return alignY; - } - - /** - * Validates the container only when necessary. - */ - private void maybeValidate() - { - if (! isValid()) - validate(); - } - - /** - * Fetches the component layout sizes into the cache. - */ - private void cacheComponentSizes() - { - if (getComponentCount() > 0) - { - Component c = getComponent(0); - min = c.getMinimumSize(); - pref = c.getPreferredSize(); - max = c.getMaximumSize(); - alignX = c.getAlignmentX(); - alignY = c.getAlignmentY(); - } - } - } - - /** - * The component that is displayed by this view. - */ - private Component comp; - - /** - * The intercepting container. - */ - private Interceptor interceptor; - - /** - * Creates a new instance of <code>ComponentView</code> for the specified - * <code>Element</code>. - * - * @param elem the element that this <code>View</code> is rendering - */ - public ComponentView(Element elem) - { - super(elem); - } - - /** - * Creates the <code>Component</code> that this <code>View</code> is - * rendering. The <code>Component</code> is determined using - * the {@link StyleConstants#ComponentAttribute} of the associated - * <code>Element</code>. - * - * @return the component that is rendered - */ - protected Component createComponent() - { - return StyleConstants.getComponent(getElement().getAttributes()); - } - - /** - * Returns the alignment of this <code>View</code> along the specified axis. - * - * @param axis either {@link View#X_AXIS} or {@link View#Y_AXIS} - * - * @return the alignment of this <code>View</code> along the specified axis - */ - public float getAlignment(int axis) - { - float align = 0.0F; - // I'd rather throw an IllegalArgumentException for illegal axis, - // but the Harmony testsuite indicates fallback to super behaviour. - if (interceptor != null && (axis == X_AXIS || axis == Y_AXIS)) - { - if (axis == X_AXIS) - align = interceptor.getAlignmentX(); - else if (axis == Y_AXIS) - align = interceptor.getAlignmentY(); - else - assert false : "Must not reach here"; - } - else - align = super.getAlignment(axis); - return align; - } - - /** - * Returns the <code>Component</code> that is rendered by this - * <code>ComponentView</code>. - * - * @return the <code>Component</code> that is rendered by this - * <code>ComponentView</code> - */ - public final Component getComponent() - { - return comp; - } - - /** - * Returns the maximum span of this <code>View</code> along the specified - * axis. - * - * This will return {@link Component#getMaximumSize()} for the specified - * axis. - * - * @return the maximum span of this <code>View</code> along the specified - * axis - */ - public float getMaximumSpan(int axis) - { - if (axis != X_AXIS && axis != Y_AXIS) - throw new IllegalArgumentException("Illegal axis"); - float span = 0; - if (interceptor != null) - { - if (axis == X_AXIS) - span = interceptor.getMaximumSize().width; - else if (axis == Y_AXIS) - span = interceptor.getMaximumSize().height; - else - assert false : "Must not reach here"; - } - return span; - } - - public float getMinimumSpan(int axis) - { - if (axis != X_AXIS && axis != Y_AXIS) - throw new IllegalArgumentException("Illegal axis"); - float span = 0; - if (interceptor != null) - { - if (axis == X_AXIS) - span = interceptor.getMinimumSize().width; - else if (axis == Y_AXIS) - span = interceptor.getMinimumSize().height; - else - assert false : "Must not reach here"; - } - return span; - } - - public float getPreferredSpan(int axis) - { - if (axis != X_AXIS && axis != Y_AXIS) - throw new IllegalArgumentException("Illegal axis"); - float span = 0; - if (interceptor != null) - { - if (axis == X_AXIS) - span = interceptor.getPreferredSize().width; - else if (axis == Y_AXIS) - span = interceptor.getPreferredSize().height; - else - assert false : "Must not reach here"; - } - return span; - } - - public Shape modelToView(int pos, Shape a, Position.Bias b) - throws BadLocationException - { - int p0 = getStartOffset(); - int p1 = getEndOffset(); - if (pos >= p0 && pos <= p1) - { - Rectangle viewRect = a.getBounds(); - if (pos == p1) - viewRect.x += viewRect.width; - viewRect.width = 0; - return viewRect; - } - else - throw new BadLocationException("Illegal position", pos); - } - - /** - * The real painting behavour is performed by normal component painting, - * triggered by the text component that hosts this view. This method does - * not paint by itself. However, it sets the size of the component according - * to the allocation that is passed here. - * - * @param g the graphics context - * @param a the allocation of the child - */ - public void paint(Graphics g, Shape a) - { - if (interceptor != null) - { - Rectangle r = a instanceof Rectangle ? (Rectangle) a : a.getBounds(); - interceptor.setBounds(r.x, r.y, r.width, r.height); - } - } - - /** - * This sets up the component when the view is added to its parent, or - * cleans up the view when it is removed from its parent. - * - * When this view is added to a parent view, the component of this view - * is added to the container that hosts this view. When <code>p</code> is - * <code>null</code>, then the view is removed from it's parent and we have - * to also remove the component from it's parent container. - * - * @param p the parent view or <code>null</code> if this view is removed - * from it's parent - */ - public void setParent(final View p) - { - super.setParent(p); - if (SwingUtilities.isEventDispatchThread()) - setParentImpl(); - else - SwingUtilities.invokeLater - (new Runnable() - { - public void run() - { - Document doc = getDocument(); - try - { - if (doc instanceof AbstractDocument) - ((AbstractDocument) doc).readLock(); - setParentImpl(); - Container host = getContainer(); - if (host != null) - { - preferenceChanged(null, true, true); - host.repaint(); - } - } - finally - { - if (doc instanceof AbstractDocument) - ((AbstractDocument) doc).readUnlock(); - } - } - }); - } - - /** - * The implementation of {@link #setParent}. This is package private to - * avoid a synthetic accessor method. - */ - void setParentImpl() - { - View p = getParent(); - if (p != null) - { - Container c = getContainer(); - if (c != null) - { - if (interceptor == null) - { - // Create component and put it inside the interceptor. - Component created = createComponent(); - if (created != null) - { - comp = created; - interceptor = new Interceptor(comp); - } - } - if (interceptor != null) - { - // Add the interceptor to the hosting container. - if (interceptor.getParent() == null) - c.add(interceptor, this); - } - } - } - else - { - if (interceptor != null) - { - Container parent = interceptor.getParent(); - if (parent != null) - parent.remove(interceptor); - } - } - } - - /** - * Maps coordinates from the <code>View</code>'s space into a position - * in the document model. - * - * @param x the x coordinate in the view space - * @param y the y coordinate in the view space - * @param a the allocation of this <code>View</code> - * @param b the bias to use - * - * @return the position in the document that corresponds to the screen - * coordinates <code>x, y</code> - */ - public int viewToModel(float x, float y, Shape a, Position.Bias[] b) - { - int pos; - // I'd rather do the following. The harmony testsuite indicates - // that a simple cast is performed. - //Rectangle r = a instanceof Rectangle ? (Rectangle) a : a.getBounds(); - Rectangle r = (Rectangle) a; - if (x < r.x + r.width / 2) - { - b[0] = Position.Bias.Forward; - pos = getStartOffset(); - } - else - { - b[0] = Position.Bias.Backward; - pos = getEndOffset(); - } - return pos; - } -} |