diff options
Diffstat (limited to 'org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/CompositeTextHover.java')
-rw-r--r-- | org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/CompositeTextHover.java | 90 |
1 files changed, 90 insertions, 0 deletions
diff --git a/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/CompositeTextHover.java b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/CompositeTextHover.java new file mode 100644 index 00000000000..89944fb780b --- /dev/null +++ b/org.eclipse.ui.genericeditor/src/org/eclipse/ui/internal/genericeditor/CompositeTextHover.java @@ -0,0 +1,90 @@ +/******************************************************************************* + * Copyright (c) 2016-2017 Red Hat Inc. and others. + * All rights reserved. This program and the accompanying materials + * are made available under the terms of the Eclipse Public License v1.0 + * which accompanies this distribution, and is available at + * http://www.eclipse.org/legal/epl-v10.html + * + * Contributors: + * - Mickael Istria (Red Hat Inc.) + *******************************************************************************/ +package org.eclipse.ui.internal.genericeditor; + +import java.util.List; + +import org.eclipse.core.runtime.Assert; +import org.eclipse.jface.text.IInformationControlCreator; +import org.eclipse.jface.text.IRegion; +import org.eclipse.jface.text.ITextHover; +import org.eclipse.jface.text.ITextHoverExtension; +import org.eclipse.jface.text.ITextHoverExtension2; +import org.eclipse.jface.text.ITextViewer; + +/** + * A text hover that delegates its operations to children + * provided in constructor and returns the first interesting result. + * + * @since 1.0 + */ +public class CompositeTextHover implements ITextHover, ITextHoverExtension, ITextHoverExtension2 { + + private List<ITextHover> hoversToConsider; + private ITextHover currentHover = null; + + public CompositeTextHover(List<ITextHover> hoversToConsider) { + Assert.isNotNull(hoversToConsider); + this.hoversToConsider = hoversToConsider; + } + + @Override + public Object getHoverInfo2(ITextViewer textViewer, IRegion hoverRegion) { + for (ITextHover hover : this.hoversToConsider) { + Object res = null; + if (hover instanceof ITextHoverExtension2) { + res = ((ITextHoverExtension2)hover).getHoverInfo2(textViewer, hoverRegion); + } else { + res = hover.getHoverInfo(textViewer, hoverRegion); + } + if (res != null) { + currentHover = hover; + return res; + } + } + return null; + } + + @Override + public IInformationControlCreator getHoverControlCreator() { + ITextHover hover = this.currentHover; + if (hover != null) { + if (hover instanceof ITextHoverExtension) { + return ((ITextHoverExtension)hover).getHoverControlCreator(); + } + } + return null; + } + + @Override + public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) { + for (ITextHover hover : this.hoversToConsider) { + String res = hover.getHoverInfo(textViewer, hoverRegion); + if (res != null) { + currentHover = hover; + return res; + } + } + return null; + } + + @Override + public IRegion getHoverRegion(ITextViewer textViewer, int offset) { + for (ITextHover hover : this.hoversToConsider) { + IRegion res = hover.getHoverRegion(textViewer, offset); + if (res != null) { + return res; + } + } + return null; + } + +} |