org.eclipse.che.ide.ext.git.client.revert.RevertCommitViewImpl.java Source code

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Here is the source code for org.eclipse.che.ide.ext.git.client.revert.RevertCommitViewImpl.java

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/*
 * Copyright (c) 2012-2018 Red Hat, Inc.
 * 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
 *
 * Contributors:
 *   Red Hat, Inc. - initial API and implementation
 */
package org.eclipse.che.ide.ext.git.client.revert;

import com.google.gwt.cell.client.TextCell;
import com.google.gwt.core.shared.GWT;
import com.google.gwt.event.dom.client.ScrollEvent;
import com.google.gwt.uibinder.client.UiBinder;
import com.google.gwt.uibinder.client.UiField;
import com.google.gwt.uibinder.client.UiHandler;
import com.google.gwt.user.cellview.client.CellTable;
import com.google.gwt.user.cellview.client.Column;
import com.google.gwt.user.client.ui.Button;
import com.google.gwt.user.client.ui.ScrollPanel;
import com.google.gwt.user.client.ui.Widget;
import com.google.gwt.view.client.SingleSelectionModel;
import com.google.inject.Inject;
import com.google.inject.Singleton;
import java.util.List;
import org.eclipse.che.api.git.shared.Revision;
import org.eclipse.che.ide.ext.git.client.DateTimeFormatter;
import org.eclipse.che.ide.ext.git.client.GitLocalizationConstant;
import org.eclipse.che.ide.ext.git.client.GitResources;
import org.eclipse.che.ide.ui.window.Window;

/**
 * The implementation of {@link RevertCommitView}.
 *
 * @author Dmitrii Bocharov (bdshadow)
 */
@Singleton
public class RevertCommitViewImpl extends Window implements RevertCommitView {
    interface RevertCommitViewImplUiBinder extends UiBinder<Widget, RevertCommitViewImpl> {
    }

    private static RevertCommitViewImplUiBinder uiBinder = GWT.create(RevertCommitViewImplUiBinder.class);

    @UiField
    ScrollPanel revisionsPanel;

    Button btnRevert;
    Button btnCancel;

    @UiField(provided = true)
    final GitResources res;

    @UiField(provided = true)
    final GitLocalizationConstant locale;

    private ActionDelegate delegate;
    private CellTable<Revision> revisions;
    private SingleSelectionModel<Revision> selectionModel;

    private final DateTimeFormatter dateTimeFormatter;

    @Inject
    protected RevertCommitViewImpl(GitResources resources, GitLocalizationConstant locale,
            org.eclipse.che.ide.Resources coreRes, DateTimeFormatter dateTimeFormatter) {
        this.res = resources;
        this.locale = locale;
        this.dateTimeFormatter = dateTimeFormatter;
        this.ensureDebugId("git-revert-window");

        Widget widget = uiBinder.createAndBindUi(this);

        this.setTitle(locale.revertCommitViewTitle());
        this.setWidget(widget);

        createRevisionsTable(coreRes);
        createButtons();
    }

    @Override
    public void setDelegate(ActionDelegate delegate) {
        this.delegate = delegate;
    }

    @Override
    public void setRevisions(List<Revision> revisions) {
        this.revisions.setRowData(revisions);
    }

    @Override
    public void setEnableRevertButton(boolean enabled) {
        btnRevert.setEnabled(enabled);
    }

    @Override
    public void close() {
        hide();
    }

    @Override
    protected void onHide() {
        selectionModel.clear();
    }

    @Override
    public void showDialog() {
        this.show();
    }

    private void createRevisionsTable(org.eclipse.che.ide.Resources coreRes) {
        Column<Revision, String> idColumn = new Column<Revision, String>(new TextCell()) {
            @Override
            public String getValue(Revision revision) {
                return revision.getId().substring(0, 8);
            }
        };
        Column<Revision, String> dateColumn = new Column<Revision, String>(new TextCell()) {
            @Override
            public String getValue(Revision revision) {
                return dateTimeFormatter.getFormattedDate(revision.getCommitTime());
            }
        };
        Column<Revision, String> authorColumn = new Column<Revision, String>(new TextCell()) {
            @Override
            public String getValue(Revision revision) {
                return revision.getCommitter().getName();
            }
        };
        Column<Revision, String> commentColumn = new Column<Revision, String>(new TextCell()) {
            @Override
            public String getValue(Revision revision) {
                return revision.getMessage().substring(0, 50);
            }
        };
        revisions = new CellTable<>(15, coreRes);
        revisions.setWidth("100%");
        revisions.addColumn(idColumn, locale.viewRevertRevisionTableIdTitle());
        revisions.setColumnWidth(idColumn, "10%");
        revisions.addColumn(dateColumn, locale.viewRevertRevisionTableDateTitle());
        revisions.setColumnWidth(dateColumn, "20%");
        revisions.addColumn(authorColumn, locale.viewRevertRevisionTableAuthorTitle());
        revisions.setColumnWidth(authorColumn, "20%");
        revisions.addColumn(commentColumn, locale.viewRevertRevisionTableCommentTitle());
        revisions.setColumnWidth(commentColumn, "50%");

        this.selectionModel = new SingleSelectionModel<>();
        this.selectionModel.addSelectionChangeHandler(event -> {
            Revision selectedObject = selectionModel.getSelectedObject();
            delegate.onRevisionSelected(selectedObject);
        });
        revisions.setSelectionModel(this.selectionModel);
        this.revisionsPanel.add(revisions);
    }

    private void createButtons() {
        btnCancel = addFooterButton(locale.buttonCancel(), "git-revert-cancel",
                event -> delegate.onCancelClicked());

        btnRevert = addFooterButton(locale.buttonRevert(), "git-revert", event -> delegate.onRevertClicked(), true);
    }

    @UiHandler("revisionsPanel")
    public void onPanelScrolled(ScrollEvent ignored) {
        // We cannot rely on exact equality of scroll positions because GWT sometimes round such values
        // and it is possible that the actual max scroll position is a pixel less then declared.
        if (revisionsPanel.getMaximumVerticalScrollPosition() - revisionsPanel.getVerticalScrollPosition() <= 1) {
            // to avoid autoscrolling to selected item
            revisionsPanel.getElement().focus();

            delegate.onScrolledToBottom();
        }
    }
}