Limit size of notification popups

This works around badly designed applications that abuse the notification subsystem to display large chunks of text
(cherry picked from commit 70526c5a3e)

tdeui/kpassivepopup.cpp

@@ -123,11 +123,39 @@ void KPassivePopup::setView( const TQString &caption, const TQString &text,
     setView( standardView( caption, text, icon, this ) );
 }
 
-TQVBox * KPassivePopup::standardView( const TQString& caption,
+static void truncateStringToFit(TQString &string, TQFont font, int max_width) {
+	bool truncated = false;
+	TQFontMetrics fm(font);
+	while (fm.width(string) > max_width) {
+		string.truncate(string.length() - 1);
+		truncated = true;
+	}
+	if (truncated) {
+		string += " ...";
+	}
+}
+
+TQVBox * KPassivePopup::standardView(const TQString& caption,
                                      const TQString& text,
                                      const TQPixmap& icon,
-                                     TQWidget *parent )
+                                     TQWidget *parent)
 {
+	TQString sizedCaption = caption;
+	TQString sizedText = text;
+
+#ifdef Q_WS_X11
+	int max_width;
+
+	NETRootInfo info( tqt_xdisplay(),
+			NET::NumberOfDesktops |
+			NET::CurrentDesktop |
+			NET::WorkArea,
+			-1, false );
+	info.activate();
+	NETRect workArea = info.workArea(info.currentDesktop());
+	max_width = workArea.size.width / 3;
+#endif
+
 	TQVBox *vb = new TQVBox( parent ? parent : this );
 	vb->setSpacing( KDialog::spacingHint() );
 	
@@ -141,18 +169,46 @@ TQVBox * KPassivePopup::standardView( const TQString& caption,
 		ttlIcon->setAlignment( AlignLeft );
 	}
 
-    if ( !caption.isEmpty() ) {
-	ttl = new TQLabel( caption, hb ? hb : vb, "title_label" );
+	if ( !sizedCaption.isEmpty() ) {
+		ttl = new TQLabel( sizedCaption, hb ? hb : vb, "title_label" );
 		TQFont fnt = ttl->font();
+#ifdef Q_WS_X11
+		truncateStringToFit(sizedCaption, fnt, max_width);
+		ttl->setText(sizedCaption);
+#endif
 		fnt.setBold( true );
 		ttl->setFont( fnt );
 		ttl->setAlignment( Qt::AlignHCenter );
-        if ( hb )
+		if ( hb ) {
 			hb->setStretchFactor( ttl, 10 ); // enforce centering
 		}
+	}
 
-    if ( !text.isEmpty() ) {
-        msg = new TQLabel( text, vb, "msg_label" );
+	if ( !sizedText.isEmpty() ) {
+		msg = new TQLabel( sizedText, vb, "msg_label" );
+#ifdef Q_WS_X11
+		TQStringList textLines = TQStringList::split("\n", sizedText, true);
+		for (TQStringList::Iterator it = textLines.begin(); it != textLines.end(); ++it) {
+			truncateStringToFit(*it, msg->font(), max_width);
+		}
+
+		// Limit message to 5 lines of text
+		if (textLines.count() > 5) {
+			int count = 3;
+			TQStringList truncatedLines;
+			for (TQStringList::Iterator it = textLines.begin(); it != textLines.end(); ++it) {
+				truncatedLines.append(*it);
+				if (count > 5) {
+					truncatedLines.append("...");
+					break;
+				}
+				count++;
+			}
+			textLines = truncatedLines;
+		}
+		sizedText = textLines.join("\n");
+		msg->setText(sizedText);
+#endif
 		msg->setAlignment( AlignLeft );
 	}
 
@@ -194,16 +250,22 @@ void KPassivePopup::mouseReleaseEvent( TQMouseEvent *e )
 
 void KPassivePopup::show()
 {
-    if ( size() != sizeHint() )
-	resize( sizeHint() );
+	TQSize desiredSize = sizeHint();
 
-    if ( d->fixedPosition.isNull() )
+	if (size() != desiredSize) {
+		resize(desiredSize);
+	}
+
+	if (d->fixedPosition.isNull()) {
 		positionSelf();
+	}
 	else {
-	if( d->popupStyle == Balloon )
-	    setAnchor( d->fixedPosition );
-	else
-	    move( d->fixedPosition );
+		if( d->popupStyle == Balloon ) {
+			setAnchor(d->fixedPosition);
+		}
+		else {
+			move(d->fixedPosition);
+		}
 	}
 	TQFrame::show();
 
@@ -346,13 +408,14 @@ void KPassivePopup::setAnchor(const TQPoint &anchor)
 
 void KPassivePopup::paintEvent( TQPaintEvent* pe )
 {
-    if( d->popupStyle == Balloon )
-    {
+	if( d->popupStyle == Balloon ) {
 		TQPainter p;
 		p.begin( this );
 		p.drawPolygon( d->surround );
-    } else
+	}
+	else {
 		TQFrame::paintEvent( pe );
+	}
 }
 
 void KPassivePopup::updateMask()