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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.java90
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;
+ }
+
+}

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