org.eclipse.tm4e.languageconfiguration.internal.widgets.OnEnterRuleTableWidget.java Source code

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Here is the source code for org.eclipse.tm4e.languageconfiguration.internal.widgets.OnEnterRuleTableWidget.java

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/**
 *  Copyright (c) 2018 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 is available at https://www.eclipse.org/legal/epl-2.0/
 *
 * SPDX-License-Identifier: EPL-2.0
 *
 *  Contributors:
 *  Lucas Bullen (Red Hat Inc.) - initial API and implementation
 */
package org.eclipse.tm4e.languageconfiguration.internal.widgets;

import java.util.Collections;
import java.util.List;

import org.eclipse.jface.layout.TableColumnLayout;
import org.eclipse.jface.resource.JFaceResources;
import org.eclipse.jface.viewers.ColumnWeightData;
import org.eclipse.jface.viewers.IStructuredContentProvider;
import org.eclipse.jface.viewers.ITableLabelProvider;
import org.eclipse.jface.viewers.LabelProvider;
import org.eclipse.jface.viewers.TableViewer;
import org.eclipse.jface.viewers.Viewer;
import org.eclipse.swt.SWT;
import org.eclipse.swt.graphics.GC;
import org.eclipse.swt.graphics.Image;
import org.eclipse.swt.widgets.Table;
import org.eclipse.swt.widgets.TableColumn;
import org.eclipse.tm4e.languageconfiguration.internal.LanguageConfigurationMessages;
import org.eclipse.tm4e.languageconfiguration.internal.supports.EnterAction;
import org.eclipse.tm4e.languageconfiguration.internal.supports.OnEnterRule;

public class OnEnterRuleTableWidget extends TableViewer {

    public OnEnterRuleTableWidget(Table table) {
        super(table);
        setContentProvider(new OnEnterRuleContentProvider());
        setLabelProvider(new OnEnterRuleLabelProvider());

        GC gc = new GC(table.getShell());
        gc.setFont(JFaceResources.getDialogFont());
        TableColumnLayout columnLayout = new TableColumnLayout();

        TableColumn column1 = new TableColumn(table, SWT.NONE);
        column1.setText(LanguageConfigurationMessages.OnEnterRuleTableWidget_beforeText);
        int minWidth = computeMinimumColumnWidth(gc,
                LanguageConfigurationMessages.OnEnterRuleTableWidget_beforeText);
        columnLayout.setColumnData(column1, new ColumnWeightData(2, minWidth, true));

        TableColumn column2 = new TableColumn(table, SWT.NONE);
        column2.setText(LanguageConfigurationMessages.OnEnterRuleTableWidget_afterText);
        minWidth = computeMinimumColumnWidth(gc, LanguageConfigurationMessages.OnEnterRuleTableWidget_afterText);
        columnLayout.setColumnData(column2, new ColumnWeightData(2, minWidth, true));

        TableColumn column3 = new TableColumn(table, SWT.NONE);
        column3.setText(LanguageConfigurationMessages.OnEnterRuleTableWidget_indentAction);
        minWidth = computeMinimumColumnWidth(gc, LanguageConfigurationMessages.OnEnterRuleTableWidget_indentAction);
        columnLayout.setColumnData(column3, new ColumnWeightData(1, minWidth, true));

        TableColumn column4 = new TableColumn(table, SWT.NONE);
        column4.setText(LanguageConfigurationMessages.OnEnterRuleTableWidget_appendText);
        minWidth = computeMinimumColumnWidth(gc, LanguageConfigurationMessages.OnEnterRuleTableWidget_appendText);
        columnLayout.setColumnData(column4, new ColumnWeightData(1, minWidth, true));

        TableColumn column5 = new TableColumn(table, SWT.NONE);
        column5.setText(LanguageConfigurationMessages.OnEnterRuleTableWidget_removeText);
        minWidth = computeMinimumColumnWidth(gc, LanguageConfigurationMessages.OnEnterRuleTableWidget_removeText);
        columnLayout.setColumnData(column5, new ColumnWeightData(1, minWidth, true));
    }

    protected int computeMinimumColumnWidth(GC gc, String string) {
        return gc.stringExtent(string).x + 10;
    }

    protected class OnEnterRuleContentProvider implements IStructuredContentProvider {

        private List<OnEnterRule> onEnterRulesList;

        @Override
        public Object[] getElements(Object input) {
            return onEnterRulesList.toArray(new OnEnterRule[onEnterRulesList.size()]);
        }

        @SuppressWarnings("unchecked")
        @Override
        public void inputChanged(Viewer viewer, Object oldInput, Object newInput) {
            if (newInput == null) {
                onEnterRulesList = Collections.EMPTY_LIST;
            } else {
                onEnterRulesList = (List<OnEnterRule>) newInput;
            }
        }

        @Override
        public void dispose() {
            onEnterRulesList = null;
        }
    }

    protected class OnEnterRuleLabelProvider extends LabelProvider implements ITableLabelProvider {

        @Override
        public Image getColumnImage(Object element, int columnIndex) {
            return null;
        }

        @Override
        public String getText(Object element) {
            return getColumnText(element, 0);
        }

        @Override
        public String getColumnText(Object element, int columnIndex) {
            OnEnterRule rule = (OnEnterRule) element;
            EnterAction action = rule.getAction();

            switch (columnIndex) {
            case 0:
                return rule.getBeforeText().pattern();
            case 1:
                return rule.getAfterText() == null ? "" : rule.getAfterText().pattern(); //$NON-NLS-1$
            case 2:
                return action.getIndentAction().toString();
            case 3:
                return action.getAppendText() == null ? "" : action.getAppendText(); //$NON-NLS-1$
            case 4:
                return action.getRemoveText() == null ? "" : action.getRemoveText().toString(); //$NON-NLS-1$
            default:
                return ""; //$NON-NLS-1$
            }
        }
    }
}