| /******************************************************************************* |
| * Copyright (c) 2000, 2017 IBM Corporation 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 |
| * |
| *******************************************************************************/ |
| package org.eclipse.dltk.internal.ui.editor.selectionaction; |
| |
| import java.util.ArrayList; |
| import java.util.Arrays; |
| import java.util.List; |
| |
| import org.eclipse.core.runtime.Assert; |
| import org.eclipse.dltk.core.IMember; |
| import org.eclipse.dltk.core.ISourceRange; |
| import org.eclipse.dltk.core.IType; |
| import org.eclipse.dltk.core.ModelException; |
| import org.eclipse.dltk.core.SourceRange; |
| import org.eclipse.dltk.internal.ui.editor.ScriptEditor; |
| import org.eclipse.dltk.ui.DLTKUIPlugin; |
| import org.eclipse.jface.action.Action; |
| import org.eclipse.jface.text.ITextSelection; |
| import org.eclipse.ui.IEditorInput; |
| import org.eclipse.ui.texteditor.IUpdate; |
| |
| public class GoToNextPreviousMemberAction extends Action implements IUpdate { |
| |
| public static final String NEXT_MEMBER = "GoToNextMember"; //$NON-NLS-1$ |
| public static final String PREVIOUS_MEMBER = "GoToPreviousMember"; //$NON-NLS-1$ |
| private ScriptEditor fEditor; |
| private boolean fIsGotoNext; |
| |
| public static GoToNextPreviousMemberAction newGoToNextMemberAction( |
| ScriptEditor editor) { |
| String text = SelectionActionMessages.GotoNextMember_label; |
| return new GoToNextPreviousMemberAction(editor, text, true); |
| } |
| |
| public static GoToNextPreviousMemberAction newGoToPreviousMemberAction( |
| ScriptEditor editor) { |
| String text = SelectionActionMessages.GotoPreviousMember_label; |
| return new GoToNextPreviousMemberAction(editor, text, false); |
| } |
| |
| private GoToNextPreviousMemberAction(ScriptEditor editor, String text, |
| boolean isGotoNext) { |
| super(text); |
| fEditor = editor; |
| fIsGotoNext = isGotoNext; |
| // if (isGotoNext) |
| // PlatformUI.getWorkbench().getHelpSystem().setHelp(this, |
| // IJavaHelpContextIds.GOTO_NEXT_MEMBER_ACTION); |
| // else |
| // PlatformUI.getWorkbench().getHelpSystem().setHelp(this, |
| // IJavaHelpContextIds.GOTO_PREVIOUS_MEMBER_ACTION); |
| } |
| |
| /* |
| * This constructor is for testing purpose only. |
| */ |
| public GoToNextPreviousMemberAction(boolean isSelectNext) { |
| super(""); //$NON-NLS-1$ |
| fIsGotoNext = isSelectNext; |
| } |
| |
| @Override |
| public void update() { |
| // Enable by default always. |
| setEnabled(true); |
| } |
| |
| @Override |
| public final void run() { |
| ITextSelection selection = getTextSelection(); |
| ISourceRange newRange = getNewSelectionRange( |
| createSourceRange(selection), null); |
| // Check if new selection differs from current selection |
| if (selection.getOffset() == newRange.getOffset() |
| && selection.getLength() == newRange.getLength()) |
| return; |
| fEditor.selectAndReveal(newRange.getOffset(), newRange.getLength()); |
| } |
| |
| private IType[] getTypes() throws ModelException { |
| IEditorInput input = fEditor.getEditorInput(); |
| return DLTKUIPlugin.getDefault().getWorkingCopyManager() |
| .getWorkingCopy(input).getTypes(); |
| } |
| |
| private ITextSelection getTextSelection() { |
| return (ITextSelection) fEditor.getSelectionProvider().getSelection(); |
| } |
| |
| public ISourceRange getNewSelectionRange(ISourceRange oldSourceRange, |
| IType[] types) { |
| try { |
| if (types == null) |
| types = getTypes(); |
| Integer[] offsetArray = createOffsetArray(types); |
| if (offsetArray.length == 0) |
| return oldSourceRange; |
| Arrays.sort(offsetArray); |
| Integer oldOffset = Integer.valueOf(oldSourceRange.getOffset()); |
| int index = Arrays.binarySearch(offsetArray, oldOffset); |
| |
| if (fIsGotoNext) |
| return createNewSourceRange( |
| getNextOffset(index, offsetArray, oldOffset)); |
| else |
| return createNewSourceRange( |
| getPreviousOffset(index, offsetArray, oldOffset)); |
| |
| } catch (ModelException e) { |
| DLTKUIPlugin.log(e); // dialog would be too heavy here |
| return oldSourceRange; |
| } |
| } |
| |
| private static Integer getPreviousOffset(int index, Integer[] offsetArray, |
| Integer oldOffset) { |
| if (index == -1) |
| return oldOffset; |
| if (index == 0) |
| return offsetArray[0]; |
| if (index > 0) |
| return offsetArray[index - 1]; |
| Assert.isTrue(index < -1); |
| int absIndex = Math.abs(index); |
| return offsetArray[absIndex - 2]; |
| } |
| |
| private static Integer getNextOffset(int index, Integer[] offsetArray, |
| Integer oldOffset) { |
| if (index == -1) |
| return offsetArray[0]; |
| |
| if (index == 0) { |
| if (offsetArray.length != 1) |
| return offsetArray[1]; |
| else |
| return offsetArray[0]; |
| } |
| if (index > 0) { |
| if (index == offsetArray.length - 1) |
| return oldOffset; |
| return offsetArray[index + 1]; |
| } |
| Assert.isTrue(index < -1); |
| int absIndex = Math.abs(index); |
| if (absIndex > offsetArray.length) |
| return oldOffset; |
| else |
| return offsetArray[absIndex - 1]; |
| } |
| |
| private static ISourceRange createNewSourceRange(Integer offset) { |
| return new SourceRange(offset.intValue(), 0); |
| } |
| |
| private static Integer[] createOffsetArray(IType[] types) |
| throws ModelException { |
| List<Integer> result = new ArrayList<>(); |
| for (int i = 0; i < types.length; i++) { |
| IType iType = types[i]; |
| addOffset(result, iType.getNameRange().getOffset()); |
| addOffset(result, iType.getSourceRange().getOffset() |
| + iType.getSourceRange().getLength()); |
| addMemberOffsetList(result, iType.getMethods()); |
| addMemberOffsetList(result, iType.getFields()); |
| // addMemberOffsetList(result, iType.getInitializers()); |
| } |
| return result.toArray(new Integer[result.size()]); |
| } |
| |
| private static void addMemberOffsetList(List result, IMember[] members) |
| throws ModelException { |
| for (int i = 0; i < members.length; i++) { |
| addOffset(result, getOffset(members[i])); |
| } |
| } |
| |
| private static int getOffset(IMember iMember) throws ModelException { |
| // special case |
| // if (iMember.getElementType() == IModelElement.INITIALIZER) |
| // return firstOpeningBraceOffset((IInitializer)iMember); |
| |
| if (iMember.getNameRange() != null |
| && iMember.getNameRange().getOffset() >= 0) |
| return iMember.getNameRange().getOffset(); |
| return iMember.getSourceRange().getOffset(); |
| } |
| |
| // -- private helper methods |
| |
| private static ISourceRange createSourceRange(ITextSelection ts) { |
| return new SourceRange(ts.getOffset(), ts.getLength()); |
| } |
| |
| private static void addOffset(List result, int offset) { |
| if (offset >= 0) |
| result.add(Integer.valueOf(offset)); |
| } |
| } |