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/*
* Copyright (c) 2011, 2012, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation. Oracle designates this
* particular file as subject to the "Classpath" exception as provided
* by Oracle in the LICENSE file that accompanied this code.
*
* This code 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
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
package com.apple.laf;
import java.awt.*;
import java.awt.event.*;
import java.awt.geom.Rectangle2D;
import java.beans.*;
import javax.swing.*;
import javax.swing.border.Border;
import javax.swing.plaf.UIResource;
import javax.swing.text.*;
public class AquaCaret extends DefaultCaret implements UIResource, PropertyChangeListener {
final boolean isMultiLineEditor;
final JTextComponent c;
boolean mFocused = false;
public AquaCaret(final Window inParentWindow, final JTextComponent inComponent) {
super();
c = inComponent;
isMultiLineEditor = (c instanceof JTextArea || c instanceof JEditorPane);
inComponent.addPropertyChangeListener(this);
}
protected Highlighter.HighlightPainter getSelectionPainter() {
return AquaHighlighter.getInstance();
}
/**
* Only show the flashing caret if the selection range is zero
*/
public void setVisible(boolean e) {
if (e) e = getDot() == getMark();
super.setVisible(e);
}
protected void fireStateChanged() {
// If we have focus the caret should only flash if the range length is zero
if (mFocused) setVisible(getComponent().isEditable());
super.fireStateChanged();
}
public void propertyChange(final PropertyChangeEvent evt) {
final String propertyName = evt.getPropertyName();
if (AquaFocusHandler.FRAME_ACTIVE_PROPERTY.equals(propertyName)) {
final JTextComponent comp = ((JTextComponent)evt.getSource());
if (evt.getNewValue() == Boolean.TRUE) {
setVisible(comp.hasFocus());
} else {
setVisible(false);
}
if (getDot() != getMark()) comp.getUI().damageRange(comp, getDot(), getMark());
}
}
// --- FocusListener methods --------------------------
private boolean shouldSelectAllOnFocus = true;
public void focusGained(final FocusEvent e) {
final JTextComponent component = getComponent();
if (!component.isEnabled() || !component.isEditable()) {
super.focusGained(e);
return;
}
mFocused = true;
if (!shouldSelectAllOnFocus) {
shouldSelectAllOnFocus = true;
super.focusGained(e);
return;
}
if (isMultiLineEditor) {
super.focusGained(e);
return;
}
final int end = component.getDocument().getLength();
final int dot = getDot();
final int mark = getMark();
if (dot == mark) {
if (dot == 0) {
component.setCaretPosition(end);
component.moveCaretPosition(0);
} else if (dot == end) {
component.setCaretPosition(0);
component.moveCaretPosition(end);
}
}
super.focusGained(e);
}
public void focusLost(final FocusEvent e) {
mFocused = false;
shouldSelectAllOnFocus = true;
if (isMultiLineEditor) {
setVisible(false);
c.repaint();
} else {
super.focusLost(e);
}
}
// This fixes the problem where when on the mac you have to ctrl left click to
// get popup triggers the caret has code that only looks at button number.
// see radar # 3125390
public void mousePressed(final MouseEvent e) {
if (!e.isPopupTrigger()) {
super.mousePressed(e);
shouldSelectAllOnFocus = false;
}
}
/**
* Damages the area surrounding the caret to cause
* it to be repainted in a new location. If paint()
* is reimplemented, this method should also be
* reimplemented. This method should update the
* caret bounds (x, y, width, and height).
*
* @param r the current location of the caret
* @see #paint
*/
protected synchronized void damage(final Rectangle r) {
if (r == null || fPainting) return;
x = r.x - 4;
y = r.y;
width = 10;
height = r.height;
// Don't damage the border area. We can't paint a partial border, so get the
// intersection of the caret rectangle and the component less the border, if any.
final Rectangle caretRect = new Rectangle(x, y, width, height);
final Border border = getComponent().getBorder();
if (border != null) {
final Rectangle alloc = getComponent().getBounds();
alloc.x = alloc.y = 0;
final Insets borderInsets = border.getBorderInsets(getComponent());
alloc.x += borderInsets.left;
alloc.y += borderInsets.top;
alloc.width -= borderInsets.left + borderInsets.right;
alloc.height -= borderInsets.top + borderInsets.bottom;
Rectangle2D.intersect(caretRect, alloc, caretRect);
}
x = caretRect.x;
y = caretRect.y;
width = Math.max(caretRect.width, 1);
height = Math.max(caretRect.height, 1);
repaint();
}
boolean fPainting = false;
// See <rdar://problem/3833837> 1.4.2_05-141.3: JTextField performance with Aqua L&F
// We are getting into a circular condition with the BasicCaret paint code since it doesn't know about the fact that our
// damage routine above elminates the border. Sadly we can't easily change either one, so we will
// add a painting flag and not damage during a repaint.
public void paint(final Graphics g) {
if (isVisible()) {
fPainting = true;
super.paint(g);
fPainting = false;
}
}
}
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