org.rstudio.studio.client.workbench.views.vcs.diff.NavGutter.java Source code

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Here is the source code for org.rstudio.studio.client.workbench.views.vcs.diff.NavGutter.java

Source

/*
 * NavGutter.java
 *
 * Copyright (C) 2009-11 by RStudio, Inc.
 *
 * This program is licensed to you under the terms of version 3 of the
 * GNU Affero General Public License. This program is distributed WITHOUT
 * ANY EXPRESS OR IMPLIED WARRANTY, INCLUDING THOSE OF NON-INFRINGEMENT,
 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Please refer to the
 * AGPL (http://www.gnu.org/licenses/agpl-3.0.txt) for more details.
 *
 */
package org.rstudio.studio.client.workbench.views.vcs.diff;

import com.google.gwt.canvas.client.Canvas;
import com.google.gwt.canvas.dom.client.Context2d;
import com.google.gwt.canvas.dom.client.CssColor;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.SimplePanel;
import org.rstudio.core.client.ValueSink;
import org.rstudio.studio.client.workbench.views.vcs.diff.Line.Type;

import java.util.ArrayList;

public class NavGutter extends Composite implements ValueSink<ArrayList<ChunkOrLine>> {
    public NavGutter() {
        container_ = new SimplePanel();
        initWidget(container_);
    }

    public void setData(CssColor background, ArrayList<CssColor> lines) {
        Canvas newCanvas = Canvas.createIfSupported();
        newCanvas.setSize("100%", "100%");
        newCanvas.setCoordinateSpaceWidth(10);
        newCanvas.setCoordinateSpaceHeight(lines.size());

        Context2d ctx = newCanvas.getContext2d();
        ctx.translate(0.5, 0.5);

        ctx.setFillStyle(background.value());
        ctx.fillRect(0, 0, 10, lines.size());

        for (int i = 0; i < lines.size(); i++) {
            CssColor color = lines.get(i);
            if (color != null) {
                ctx.setFillStyle(color.value());
                ctx.fillRect(0, i, 10, 1);
            }
        }

        container_.setWidget(newCanvas);
    }

    @Override
    public void setValue(ArrayList<ChunkOrLine> value) {
        ArrayList<CssColor> colors = new ArrayList<CssColor>(value.size());
        for (ChunkOrLine item : value) {
            Line line = item.getLine();
            Type type = line == null ? Type.Same : line.getType();
            switch (type) {
            case Insertion:
                colors.add(CssColor.make("#6F6"));
                break;
            case Deletion:
                colors.add(CssColor.make("pink"));
                break;
            default:
            case Comment:
            case Same:
                colors.add(null);
                break;
            }
        }
        setData(CssColor.make("#e1e2e5"), colors);
    }

    private final SimplePanel container_;
}