Attachment #216195 for bug #380520

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import java.io.IOException;

import org.eclipse.swt.SWT;
import org.eclipse.swt.SWTException;
import org.eclipse.swt.custom.StyledText;
import org.eclipse.swt.graphics.Point;
import org.eclipse.swt.graphics.Rectangle;

import org.eclipse.jface.text.IInformationControlCreator;
import org.eclipse.jface.text.IRegion;
import org.eclipse.jface.text.ITextViewer;
import org.eclipse.jface.text.source.ISourceViewer;

import org.eclipse.ui.IEditorPart;
import org.eclipse.ui.part.IWorkbenchPartOrientation;

		return null;
	}

	private String getBracketHoverInfo(final ITextViewer textViewer, IRegion region, ITypeRoot editorInput) {
		IEditorPart editor= getEditor();
		if (!(editor instanceof JavaEditor))
			return null;

		int offset= region.getOffset();
		IDocument document= textViewer.getDocument();
		if (document == null)
			return null;
		try {
			char c= document.getChar(offset);
			if (c != '}')
				return null;
			JavaPairMatcher matcher= ((JavaEditor) editor).getBracketMatcher();
			if (matcher == null)
				return null;
			IRegion match= matcher.match(document, offset);
			if (match == null)
				return null;

			int sourceOffset;
			int sourceLength;
			String delim= StubUtility.getLineDelimiterUsed(editorInput);

			CompilationUnit ast= SharedASTProvider.getAST(editorInput, SharedASTProvider.WAIT_NO, null);

			}

			int line1= document.getLineOfOffset(nodeStart);
			int sourceOffset= document.getLineOffset(line1);
			int line2= document.getLineOfOffset(nodeStart + nodeLength);
			int hoveredLine= document.getLineOfOffset(offset);
			if (line2 > hoveredLine)
				line2= hoveredLine;

			//check if line1 is visible
			JavaEditor javaEditor= (JavaEditor) editor;
			final ISourceViewer viewer= javaEditor.getViewer();
			final int[] topIndex= new int[1];
			StyledText textWidget= textViewer.getTextWidget();
			if (textWidget == null)
				return null;

			Display display;
			try {
				display= textWidget.getDisplay();
			} catch (SWTException ex) {
				if (ex.code == SWT.ERROR_WIDGET_DISPOSED)
					return null;
				else
					throw ex;
			}

			display.syncExec(new Runnable() {
				public void run() {
					topIndex[0]= textViewer.getTopIndex();
				}
			});

			int topLine= topIndex[0];
			int noOfSourceLines;
			IRegion endLine;

				endLine= document.getLineInformation(line2);
				fUpwardShiftInLines= line2 - line1;
			}
			sourceLength= (endLine.getOffset() + endLine.getLength()) - sourceOffset;
			if (fUpwardShiftInLines == 0)
				return null;

			int sourceLength= (endLine.getOffset() + endLine.getLength()) - sourceOffset;
			String source= document.get(sourceOffset, sourceLength);
			String[] sourceLines= getTrimmedSource(source, editorInput);
			if (sourceLines == null)

Return to bug 380520

Lines 13-18 Link Here

(-)a/org.eclipse.jdt.ui/ui/org/eclipse/jdt/internal/ui/text/java/hover/JavaSourceHover.java (-17 / +27 lines)
13	import java.io.IOException;	13	import java.io.IOException;
14		14
15	import org.eclipse.swt.SWT;	15	import org.eclipse.swt.SWT;
		16	import org.eclipse.swt.SWTException;
16	import org.eclipse.swt.custom.StyledText;	17	import org.eclipse.swt.custom.StyledText;
17	import org.eclipse.swt.graphics.Point;	18	import org.eclipse.swt.graphics.Point;
18	import org.eclipse.swt.graphics.Rectangle;	19	import org.eclipse.swt.graphics.Rectangle;
Lines 26-32 Link Here
26	import org.eclipse.jface.text.IInformationControlCreator;	27	import org.eclipse.jface.text.IInformationControlCreator;
27	import org.eclipse.jface.text.IRegion;	28	import org.eclipse.jface.text.IRegion;
28	import org.eclipse.jface.text.ITextViewer;	29	import org.eclipse.jface.text.ITextViewer;
29	import org.eclipse.jface.text.source.ISourceViewer;
30		30
31	import org.eclipse.ui.IEditorPart;	31	import org.eclipse.ui.IEditorPart;
32	import org.eclipse.ui.part.IWorkbenchPartOrientation;	32	import org.eclipse.ui.part.IWorkbenchPartOrientation;
Lines 118-141 Link Here
118	return null;	118	return null;
119	}	119	}
120		120
121	private String getBracketHoverInfo(ITextViewer textViewer, IRegion region, ITypeRoot editorInput) {	121	private String getBracketHoverInfo(final ITextViewer textViewer, IRegion region, ITypeRoot editorInput) {
122	IEditorPart editor= getEditor();	122	IEditorPart editor= getEditor();
123	if (!(editor instanceof JavaEditor))	123	if (!(editor instanceof JavaEditor))
124	return null;	124	return null;
125		125
126	int offset= region.getOffset();	126	int offset= region.getOffset();
127	IDocument document= textViewer.getDocument();	127	IDocument document= textViewer.getDocument();
		128	if (document == null)
		129	return null;
128	try {	130	try {
129	char c= document.getChar(offset);	131	char c= document.getChar(offset);
130	if (c != '}')	132	if (c != '}')
131	return null;	133	return null;
132	JavaPairMatcher matcher= ((JavaEditor) editor).getBracketMatcher();	134	JavaPairMatcher matcher= ((JavaEditor) editor).getBracketMatcher();
		135	if (matcher == null)
		136	return null;
133	IRegion match= matcher.match(document, offset);	137	IRegion match= matcher.match(document, offset);
134	if (match == null)	138	if (match == null)
135	return null;	139	return null;
136		140
137	int sourceOffset;
138	int sourceLength;
139	String delim= StubUtility.getLineDelimiterUsed(editorInput);	141	String delim= StubUtility.getLineDelimiterUsed(editorInput);
140		142
141	CompilationUnit ast= SharedASTProvider.getAST(editorInput, SharedASTProvider.WAIT_NO, null);	143	CompilationUnit ast= SharedASTProvider.getAST(editorInput, SharedASTProvider.WAIT_NO, null);
Lines 167-192 Link Here
167	}	169	}
168		170
169	int line1= document.getLineOfOffset(nodeStart);	171	int line1= document.getLineOfOffset(nodeStart);
170	sourceOffset= document.getLineOffset(line1);	172	int sourceOffset= document.getLineOffset(line1);
171	int line2= document.getLineOfOffset(nodeStart + nodeLength);	173	int line2= document.getLineOfOffset(nodeStart + nodeLength);
172	int hoveredLine= document.getLineOfOffset(offset);	174	int hoveredLine= document.getLineOfOffset(offset);
173	if (line2 > hoveredLine)	175	if (line2 > hoveredLine)
174	line2= hoveredLine;	176	line2= hoveredLine;
175		177
176	//check if line1 is visible	178	//check if line1 is visible
177	JavaEditor javaEditor= (JavaEditor) editor;
178	final ISourceViewer viewer= javaEditor.getViewer();
179	final int[] topIndex= new int[1];	179	final int[] topIndex= new int[1];
180	StyledText textWidget= viewer.getTextWidget();	180	StyledText textWidget= textViewer.getTextWidget();
181	if (textWidget != null) {	181	if (textWidget == null)
182	Display display= textWidget.getDisplay();	182	return null;
183	display.syncExec(new Runnable() {	183
184	public void run() {	184	Display display;
185	topIndex[0]= viewer.getTopIndex();	185	try {
186	}	186	display= textWidget.getDisplay();
187	});	187	} catch (SWTException ex) {
		188	if (ex.code == SWT.ERROR_WIDGET_DISPOSED)
		189	return null;
		190	else
		191	throw ex;
188	}	192	}
189		193
		194	display.syncExec(new Runnable() {
		195	public void run() {
		196	topIndex[0]= textViewer.getTopIndex();
		197	}
		198	});
		199
190	int topLine= topIndex[0];	200	int topLine= topIndex[0];
191	int noOfSourceLines;	201	int noOfSourceLines;
192	IRegion endLine;	202	IRegion endLine;
Lines 208-217 Link Here
208	endLine= document.getLineInformation(line2);	218	endLine= document.getLineInformation(line2);
209	fUpwardShiftInLines= line2 - line1;	219	fUpwardShiftInLines= line2 - line1;
210	}	220	}
211	sourceLength= (endLine.getOffset() + endLine.getLength()) - sourceOffset;
212	if (fUpwardShiftInLines == 0)	221	if (fUpwardShiftInLines == 0)
213	return null;	222	return null;
214		223
		224	int sourceLength= (endLine.getOffset() + endLine.getLength()) - sourceOffset;
215	String source= document.get(sourceOffset, sourceLength);	225	String source= document.get(sourceOffset, sourceLength);
216	String[] sourceLines= getTrimmedSource(source, editorInput);	226	String[] sourceLines= getTrimmedSource(source, editorInput);
217	if (sourceLines == null)	227	if (sourceLines == null)