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es.gob.afirma.standalone.ui.EditorFocusManager Maven / Gradle / Ivy
/* Copyright (C) 2011 [Gobierno de Espana]
* This file is part of "Cliente @Firma".
* "Cliente @Firma" 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 of the License, or (at your option) any later version.
* - or The European Software License; either version 1.1 or (at your option) any later version.
* You may contact the copyright holder at: [email protected]
*/
package es.gob.afirma.standalone.ui;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Font;
import java.awt.event.ComponentEvent;
import java.awt.event.ComponentListener;
import java.awt.event.FocusEvent;
import java.awt.event.FocusListener;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.net.URL;
import java.util.AbstractList;
import java.util.Vector;
import javax.accessibility.AccessibleHyperlink;
import javax.accessibility.AccessibleHypertext;
import javax.swing.JEditorPane;
import javax.swing.JLabel;
import javax.swing.JPopupMenu;
import javax.swing.JScrollPane;
import javax.swing.UIManager;
import javax.swing.event.HyperlinkEvent;
import javax.swing.event.HyperlinkListener;
import javax.swing.text.Style;
import javax.swing.text.StyleConstants;
import javax.swing.text.StyleContext;
import javax.swing.text.html.HTMLDocument;
import es.gob.afirma.standalone.LookAndFeelManager;
/** Gestor de foco en hipervínculos HTML.
* @author Tomás García-Merás. */
public final class EditorFocusManager extends KeyAdapter implements FocusListener,
HyperlinkListener,
ComponentListener {
private final JEditorPane displayPane;
private final Style linkUnfocusedStyle;
private final Style linkFocusedStyle;
private final AbstractList hyperLinks;
private int selectedLink = 0;
private final EditorFocusManagerAction hlAction;
/** Crea un gestor de foco en hipervínculos HTML.
* @param displayPane Editor que contiene el HTML.
* @param efma Clase con la tarea a hacer en caso de acción sobre el
* hipervínculo. */
public EditorFocusManager (final JEditorPane displayPane, final EditorFocusManagerAction efma) {
super();
this.displayPane = displayPane;
this.hlAction = efma;
final Font defaultFont = new Font(new JLabel().getFont().getAttributes());
final String bodyRule = "body { font-family: " + defaultFont.getFamily() + "; font-size: " + defaultFont.getSize() + "pt; }"; //$NON-NLS-1$//$NON-NLS-2$ //$NON-NLS-3$
((HTMLDocument) this.displayPane.getDocument()).getStyleSheet().addRule(bodyRule);
if (LookAndFeelManager.HIGH_CONTRAST) {
final Color color = new JLabel().getForeground();
final String colorConfig = "rgb(" + color.getRed() + ", " + color.getGreen() + ", " + color.getBlue() + ")"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
final String highContrastColorRule = "body {color: " + colorConfig + "; }"; //$NON-NLS-1$//$NON-NLS-2$
((HTMLDocument) this.displayPane.getDocument()).getStyleSheet().addRule(highContrastColorRule);
}
final StyleContext sc = new StyleContext();
this.linkUnfocusedStyle = sc.addStyle("linkUnfocused", sc.getStyle(StyleContext.DEFAULT_STYLE)); //$NON-NLS-1$
StyleConstants.setUnderline(this.linkUnfocusedStyle, true);
StyleConstants.setForeground(this.linkUnfocusedStyle, Color.BLUE);
StyleConstants.setBackground(
this.linkUnfocusedStyle,
UIManager.getColor("TREE.background")!=null ? UIManager.getColor("TREE.background") : Color.WHITE //$NON-NLS-1$ //$NON-NLS-2$
);
this.linkFocusedStyle = sc.addStyle("linkFocused", sc.getStyle(StyleContext.DEFAULT_STYLE)); //$NON-NLS-1$
StyleConstants.setBackground(
this.linkFocusedStyle,
UIManager.getColor("TREE.selectionBackground")!=null ? UIManager.getColor("TREE.selectionBackground") : Color.BLUE //$NON-NLS-1$ //$NON-NLS-2$
);
StyleConstants.setForeground(
this.linkFocusedStyle,
UIManager.getColor("TREE.selectionForeground")!=null ? UIManager.getColor("TREE.selectionForeground") : Color.WHITE //$NON-NLS-1$ //$NON-NLS-2$
);
final AccessibleHypertext accessibleHypertext = (AccessibleHypertext) this.displayPane.getAccessibleContext().getAccessibleText();
this.hyperLinks = new Vector<>(accessibleHypertext.getLinkCount());
for (int i=0; i 1) {
int startIndex = this.hyperLinks.get(this.selectedLink).getStartIndex();
((HTMLDocument) this.displayPane.getDocument()).setCharacterAttributes(
startIndex,
this.hyperLinks.get(this.selectedLink).getEndIndex() - startIndex,
this.linkUnfocusedStyle,
false
);
this.selectedLink = this.selectedLink + 1;
if (this.selectedLink == this.hyperLinks.size()) {
this.selectedLink = 0;
}
startIndex = this.hyperLinks.get(this.selectedLink).getStartIndex();
((HTMLDocument) this.displayPane.getDocument()).setCharacterAttributes(
startIndex,
this.hyperLinks.get(this.selectedLink).getEndIndex() - startIndex,
this.linkFocusedStyle,
false
);
}
break;
case KeyEvent.VK_LEFT:
case KeyEvent.VK_UP:
if (this.hyperLinks.size() > 1) {
int startIndex = this.hyperLinks.get(this.selectedLink).getStartIndex();
((HTMLDocument) this.displayPane.getDocument()).setCharacterAttributes(
startIndex,
this.hyperLinks.get(this.selectedLink).getEndIndex() - startIndex,
this.linkUnfocusedStyle,
false
);
this.selectedLink = this.selectedLink - 1;
if (this.selectedLink == -1) {
this.selectedLink = this.hyperLinks.size()-1;
}
startIndex = this.hyperLinks.get(this.selectedLink).getStartIndex();
((HTMLDocument) this.displayPane.getDocument()).setCharacterAttributes(
startIndex,
this.hyperLinks.get(this.selectedLink).getEndIndex() - startIndex,
this.linkFocusedStyle,
false
);
}
break;
case KeyEvent.VK_SPACE:
case KeyEvent.VK_ENTER:
if (this.hlAction != null) {
this.hlAction.openHyperLink(new HyperlinkEvent(this, HyperlinkEvent.EventType.ACTIVATED, (URL) this.hyperLinks.get(this.selectedLink).getAccessibleActionObject(0)), this.selectedLink);
}
break;
default:
break;
}
}
@Override
public void focusGained(final FocusEvent e) {
if (this.hyperLinks.size() > 0) {
final int startIndex = this.hyperLinks.get(this.selectedLink).getStartIndex();
((HTMLDocument) this.displayPane.getDocument()).setCharacterAttributes(
startIndex,
this.hyperLinks.get(this.selectedLink).getEndIndex() - startIndex,
this.linkFocusedStyle,
false
);
}
}
@Override
public void focusLost(final FocusEvent e) {
if (this.hyperLinks.size() > 0) {
final int startIndex = this.hyperLinks.get(this.selectedLink).getStartIndex();
((HTMLDocument) this.displayPane.getDocument()).setCharacterAttributes(
startIndex,
this.hyperLinks.get(this.selectedLink).getEndIndex() - startIndex,
this.linkUnfocusedStyle,
false
);
}
}
@Override
public void hyperlinkUpdate(final HyperlinkEvent he) {
if (HyperlinkEvent.EventType.ACTIVATED.equals(he.getEventType()) && this.hlAction != null) {
this.hlAction.openHyperLink(he, this.selectedLink);
}
}
private static int getBestFontSizeForJOptionPane(final int width, final int height, final String text, final String fontFamily, final int minSize) {
final String bodyRule = "body { font-family: " + fontFamily + "; font-size: %f%pt; }"; //$NON-NLS-1$//$NON-NLS-2$
for (int i = minSize; i < 100; i++) {
final JEditorPane editorPane = new JEditorPane("text/html", text); //$NON-NLS-1$
((HTMLDocument) editorPane.getDocument()).getStyleSheet().addRule(bodyRule.replace("%f%", Integer.toString(i))); //$NON-NLS-1$
editorPane.setSize(width, Integer.MAX_VALUE);
editorPane.setEditable(false);
final JPopupMenu popup = new JPopupMenu();
popup.add(new JScrollPane(editorPane));
final Dimension d = popup.getPreferredSize();
popup.setPopupSize(Math.min(width, d.width), d.height);
if (popup.getPreferredSize().height > height) {
return i-1;
}
}
return minSize;
}
private boolean editorFirstShow = true;
@Override public void componentResized(final ComponentEvent e) {
if (this.editorFirstShow) {
final int bestFontSize = getBestFontSizeForJOptionPane(this.displayPane.getWidth(), this.displayPane.getHeight(), this.displayPane.getText(), UIManager.getFont("Label.font").getFamily(), UIManager.getFont("Label.font").getSize()); //$NON-NLS-1$ //$NON-NLS-2$
final String bodyRule = "body { font-family: " + UIManager.getFont("Label.font").getFamily() + "; font-size: " + bestFontSize + "pt; }"; //$NON-NLS-1$ //$NON-NLS-2$ //$NON-NLS-3$ //$NON-NLS-4$
((HTMLDocument) this.displayPane.getDocument()).getStyleSheet().addRule(bodyRule);
this.editorFirstShow = false;
}
}
@Override public void componentMoved(final ComponentEvent e) { /* No implementado */ }
@Override public void componentHidden(final ComponentEvent e) { /* No implementado */ }
@Override public void componentShown(final ComponentEvent e) { /* No implementado */ }
}
