mirror of
https://github.com/peterdell/wudsn-ide.git
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169 lines
5.1 KiB
Java
169 lines
5.1 KiB
Java
/**
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* Copyright (C) 2009 - 2019 <a href="https://www.wudsn.com" target="_top">Peter Dell</a>
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*
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* This file is part of WUDSN IDE.
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*
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* WUDSN IDE is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 2 of the License, or
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* (at your option) any later version.
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*
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* WUDSN IDE is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with WUDSN IDE. If not, see <http://www.gnu.org/licenses/>.
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*/
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package com.wudsn.ide.asm.editor;
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import java.util.List;
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import java.util.ResourceBundle;
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import org.eclipse.jface.text.BadLocationException;
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import org.eclipse.jface.text.IDocument;
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import org.eclipse.jface.text.ITextOperationTarget;
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import org.eclipse.jface.text.TextSelection;
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import org.eclipse.jface.text.source.SourceViewer;
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import org.eclipse.jface.viewers.ISelection;
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import org.eclipse.ui.texteditor.TextEditorAction;
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import com.wudsn.ide.asm.AssemblerPlugin;
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/**
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* Action to toggle a comment.
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*
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* @author Peter Dell
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* @author Andy Reek
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*/
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final class AssemblerEditorToggleCommentAction extends TextEditorAction {
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/**
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* The owning editor.
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*/
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private final AssemblerEditor editor;
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/**
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* The editor's source viewer.
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*/
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private final SourceViewer sourceViewer;
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/**
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* Creates a new instance.
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*
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* @param bundle
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* The resource bundle, not <code>null</code>.
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* @param prefix
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* The resource bundle key prefix, not <code>null</code>.
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*
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* @param editor
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* The assembler editor, not <code>null</code>.
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* @param sourceViewer
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* The assembler editor's source viewer.
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*
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*/
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AssemblerEditorToggleCommentAction(ResourceBundle bundle, String prefix,
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AssemblerEditor editor, SourceViewer sourceViewer) {
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super(bundle, prefix, editor);
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if (editor == null) {
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throw new IllegalArgumentException(
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"Parameter 'editor' must not be null.");
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}
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if (sourceViewer == null) {
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throw new IllegalArgumentException(
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"Parameter 'sourceViewer' must not be null.");
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}
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this.editor = editor;
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this.sourceViewer = sourceViewer;
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}
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@Override
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public void update() {
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setEnabled(canModifyEditor());
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}
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@Override
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public void run() {
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IDocument document = sourceViewer.getDocument();
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ISelection selection = sourceViewer.getSelection();
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TextSelection textSelection;
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if (selection instanceof TextSelection) {
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textSelection = (TextSelection) selection;
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boolean isCommented = isCommented(document, textSelection);
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if (isCommented) {
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sourceViewer.doOperation(ITextOperationTarget.STRIP_PREFIX);
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} else {
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sourceViewer.doOperation(ITextOperationTarget.PREFIX);
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}
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}
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}
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/**
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* Checks, if the selection in the given document is commented fully using
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* one of the single line comment delimiters.
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*
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* @param document
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* The document, not <code>null</code>.
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* @param selection
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* The selection, not <code>null</code>.
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*
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* @return <code>true</code>, if commented.
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*/
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private boolean isCommented(IDocument document, TextSelection selection) {
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if (document == null) {
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throw new IllegalArgumentException(
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"Parameter 'document' must not be null.");
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}
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if (selection == null) {
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throw new IllegalArgumentException(
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"Parameter 'selection' must not be null.");
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}
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try {
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int startLine = selection.getStartLine();
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int endLine = selection.getEndLine();
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for (int line = startLine; line <= endLine; line++) {
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int lineOffset = document.getLineOffset(line);
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int lineLength = document.getLineLength(line);
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String lineText = document.get(lineOffset, lineLength);
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if (!isCommented(lineText)) {
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return false;
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}
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}
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} catch (BadLocationException ex) {
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AssemblerPlugin.getInstance().logError("Cannot find location", null, ex);
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}
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return true;
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}
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/**
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* Checks, if the line is commented using one of the single line comment
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* delimiters.
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*
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* @param lineText
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* The line text, may be empty, not <code>null</code>.
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*
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* @return <code>true</code>, if commented.
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*/
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private boolean isCommented(String lineText) {
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if (lineText == null) {
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throw new IllegalArgumentException(
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"Parameter 'lineText' must not be null.");
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}
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List<String> singleLineCommentDeliminters;
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singleLineCommentDeliminters = editor.getCompilerDefinition()
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.getSyntax().getSingleLineCommentDelimiters();
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for (String delimiter : singleLineCommentDeliminters) {
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if (lineText.startsWith(delimiter)) {
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return true;
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}
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}
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return false;
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}
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}
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