| /******************************************************************************* |
| * Copyright (c) 2006, 2016 Red Hat Inc. and others. |
| * |
| * This program and the accompanying materials |
| * are made available under the terms of the Eclipse Public License 2.0 |
| * which accompanies this distribution, and is available at |
| * https://www.eclipse.org/legal/epl-2.0/ |
| * |
| * SPDX-License-Identifier: EPL-2.0 |
| * |
| * Contributors: |
| * Red Hat Incorporated - initial API and implementation |
| *******************************************************************************/ |
| package org.eclipse.cdt.internal.autotools.ui.editors.automake; |
| |
| import org.eclipse.cdt.make.core.makefile.IDirective; |
| import org.eclipse.cdt.make.core.makefile.IMacroDefinition; |
| import org.eclipse.jface.text.BadLocationException; |
| import org.eclipse.jface.text.IDocument; |
| 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.ITextViewer; |
| import org.eclipse.jface.text.Region; |
| import org.eclipse.swt.graphics.Point; |
| |
| public class AutomakeTextHover implements ITextHover, ITextHoverExtension { |
| |
| AutomakeEditor editor; |
| |
| public AutomakeTextHover(AutomakeEditor editor) { |
| this.editor = editor; |
| } |
| |
| @Override |
| public String getHoverInfo(ITextViewer textViewer, IRegion hoverRegion) { |
| TargetRule target = null; |
| String[] preReqs = null; |
| |
| if (hoverRegion == null || hoverRegion.getLength() == 0) |
| return null; |
| Automakefile makefile = (Automakefile) editor.getMakefile(); |
| if (makefile == null) |
| return null; |
| |
| String hoverText; |
| int hoverLine; |
| try { |
| hoverText = textViewer.getDocument().get(hoverRegion.getOffset(), hoverRegion.getLength()); |
| hoverLine = textViewer.getDocument().getLineOfOffset(hoverRegion.getOffset()); |
| } catch (BadLocationException e) { |
| return null; |
| } |
| |
| // Automatic variables |
| if (hoverText.startsWith("$")) { //$NON-NLS-1$ |
| IDirective containingDirective = makefile.getDirectiveContainingLine(hoverLine); |
| if (containingDirective instanceof TargetRule) { |
| target = (TargetRule) containingDirective; |
| } |
| if (target == null) |
| return ""; //$NON-NLS-1$ |
| switch (hoverText.charAt(1)) { |
| case '@': |
| return target.getTarget().toString(); |
| case '<': |
| preReqs = target.getPrerequisites(); |
| if (preReqs != null && preReqs.length > 0) |
| return preReqs[0]; |
| break; |
| // FIXME: implement $* ? |
| // case '*': |
| // break; |
| case '?': |
| preReqs = target.getPrerequisites(); |
| if (preReqs != null && preReqs.length > 0) { |
| StringBuilder toReturn = new StringBuilder(); |
| toReturn.append(preReqs[0]); |
| for (int i = 1; i < preReqs.length; i++) { |
| toReturn.append(' ').append(preReqs[i]); |
| } |
| return toReturn.toString(); |
| } |
| break; |
| case '%': |
| // if (target instanceOf ArchiveTarget) { |
| // return target.getMember(); |
| // } else { |
| // error; |
| // } |
| // break; |
| default: |
| break; |
| } |
| } else { |
| // Macros |
| IMacroDefinition[] macroDefinitions = makefile.getMacroDefinitions(hoverText); |
| for (int i = 0; i < macroDefinitions.length; i++) { |
| IMacroDefinition definition = macroDefinitions[i]; |
| if (definition.getName().equals(hoverText)) |
| return definition.getValue().toString(); |
| } |
| } |
| |
| return ""; //$NON-NLS-1$ |
| } |
| |
| @Override |
| public IRegion getHoverRegion(ITextViewer textViewer, int offset) { |
| |
| if (textViewer != null) { |
| /* |
| * If the hover offset falls within the selection range return the |
| * region for the whole selection. |
| */ |
| Point selectedRange = textViewer.getSelectedRange(); |
| if (selectedRange.x >= 0 && selectedRange.y > 0 && offset >= selectedRange.x |
| && offset <= selectedRange.x + selectedRange.y) |
| return new Region(selectedRange.x, selectedRange.y); |
| else { |
| return findWord(textViewer.getDocument(), offset); |
| } |
| } |
| return null; |
| } |
| |
| private IRegion findWord(IDocument document, int offset) { |
| int start = -1; |
| int end = -1; |
| |
| try { |
| int pos = offset; |
| char c; |
| |
| while (pos >= 0) { |
| c = document.getChar(pos); |
| if (!Character.isJavaIdentifierPart(c) && (c != '@') && (c != '<') && (c != '*') && (c != '?') |
| && (c != '%')) |
| break; |
| --pos; |
| } |
| |
| start = pos; |
| |
| pos = offset; |
| int length = document.getLength(); |
| |
| while (pos < length) { |
| c = document.getChar(pos); |
| if (!Character.isJavaIdentifierPart(c) && (c != '@') && (c != '<') && (c != '*') && (c != '?') |
| && (c != '%')) |
| break; |
| ++pos; |
| } |
| |
| end = pos; |
| |
| } catch (BadLocationException x) { |
| } |
| |
| if (start > -1 && end > -1) { |
| if (start == offset && end == offset) |
| return new Region(offset, 0); |
| else if (start == offset) |
| return new Region(start, end - start); |
| else |
| return new Region(start + 1, end - start - 1); |
| } |
| |
| return null; |
| } |
| |
| @Override |
| public IInformationControlCreator getHoverControlCreator() { |
| // TODO Auto-generated method stub |
| return null; |
| } |
| |
| } |