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Label and ToolTip: fixed font sizes for HTML headings

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This commit is contained in:
Karl Tauber
2020-01-08 10:18:30 +01:00
parent 822cd16daa
commit 8e84112837
7 changed files with 376 additions and 94 deletions
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47
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatLabelUI.java
View File

@@ -20,12 +20,14 @@ import java.awt.Color;
import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Rectangle;
import java.beans.PropertyChangeEvent;
import javax.swing.Icon;
import javax.swing.JComponent;
import javax.swing.JLabel;
import javax.swing.SwingUtilities;
import javax.swing.UIManager;
import javax.swing.plaf.ComponentUI;
import javax.swing.plaf.basic.BasicHTML;
import javax.swing.plaf.basic.BasicLabelUI;
import com.formdev.flatlaf.FlatLaf;
import com.formdev.flatlaf.util.UIScale;
@@ -77,6 +79,51 @@ public class FlatLabelUI
defaults_initialized = false;
}
@Override
protected void installComponents( JLabel c ) {
super.installComponents( c );
// update HTML renderer if necessary
updateHTMLRenderer( c, c.getText(), false );
}
@Override
public void propertyChange( PropertyChangeEvent e ) {
String name = e.getPropertyName();
if( name == "text" || name == "font" || name == "foreground" ) {
JLabel label = (JLabel) e.getSource();
updateHTMLRenderer( label, label.getText(), true );
} else
super.propertyChange( e );
}
/**
* Checks whether text contains HTML headings and adds a special CSS rule to
* re-calculate heading font sizes based on current component font size.
*/
static void updateHTMLRenderer( JComponent c, String text, boolean always ) {
if( BasicHTML.isHTMLString( text ) &&
c.getClientProperty( "html.disable" ) != Boolean.TRUE &&
text.contains( "<h" ) &&
(text.contains( "<h1" ) || text.contains( "<h2" ) || text.contains( "<h3" ) ||
text.contains( "<h4" ) || text.contains( "<h5" ) || text.contains( "<h6" )) )
{
int headIndex = text.indexOf( "<head>" );
String style = "<style>BASE_SIZE " + c.getFont().getSize() + "</style>";
if( headIndex < 0 )
style = "<head>" + style + "</head>";
int insertIndex = headIndex >= 0 ? (headIndex + "<head>".length()) : "<html>".length();
text = text.substring( 0, insertIndex )
+ style
+ text.substring( insertIndex );
} else if( !always )
return; // not necessary to invoke BasicHTML.updateRenderer()
BasicHTML.updateRenderer( c, text );
}
@Override
protected void paintEnabledText( JLabel l, Graphics g, String s, int textX, int textY ) {
int mnemIndex = FlatLaf.isShowMnemonics() ? l.getDisplayedMnemonicIndex() : -1;

35
flatlaf-core/src/main/java/com/formdev/flatlaf/ui/FlatToolTipUI.java
View File

@@ -21,6 +21,7 @@ import java.awt.FontMetrics;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Insets;
import java.beans.PropertyChangeListener;
import java.util.List;
import javax.swing.JComponent;
import javax.swing.JToolTip;
@@ -47,6 +48,8 @@ import com.formdev.flatlaf.util.StringUtils;
public class FlatToolTipUI
extends BasicToolTipUI
{
private static PropertyChangeListener sharedPropertyChangedListener;
private static ComponentUI instance;
public static ComponentUI createUI( JComponent c ) {
@@ -55,6 +58,38 @@ public class FlatToolTipUI
return instance;
}
@Override
public void installUI( JComponent c ) {
super.installUI( c );
// update HTML renderer if necessary
FlatLabelUI.updateHTMLRenderer( c, ((JToolTip)c).getTipText(), false );
}
@Override
protected void installListeners( JComponent c ) {
super.installListeners( c );
if( sharedPropertyChangedListener == null ) {
sharedPropertyChangedListener = e -> {
String name = e.getPropertyName();
if( name == "text" || name == "font" || name == "foreground" ) {
JToolTip toolTip = (JToolTip) e.getSource();
FlatLabelUI.updateHTMLRenderer( toolTip, toolTip.getTipText(), false );
}
};
}
c.addPropertyChangeListener( sharedPropertyChangedListener );
}
@Override
protected void uninstallListeners( JComponent c ) {
super.uninstallListeners( c );
c.removePropertyChangeListener( sharedPropertyChangedListener );
}
@Override
public Dimension getPreferredSize( JComponent c ) {
if( isMultiLine( c ) ) {