/*
* ChunkPlotWidget.java
*
* Copyright (C) 2009-16 by RStudio, Inc.
*
* Unless you have received this program directly from RStudio pursuant
* to the terms of a commercial license agreement with RStudio, then
* 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.source.editors.text;
import org.rstudio.core.client.dom.ImageElementEx;
import org.rstudio.core.client.widget.FixedRatioWidget;
import org.rstudio.studio.client.common.FilePathUtils;
import org.rstudio.studio.client.rmarkdown.model.NotebookPlotMetadata;
import org.rstudio.studio.client.workbench.views.source.editors.text.rmd.ChunkOutputUi;
import com.google.gwt.dom.client.Style.Unit;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.DOM;
import com.google.gwt.user.client.Event;
import com.google.gwt.user.client.EventListener;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.HTMLPanel;
import com.google.gwt.user.client.ui.Image;
import com.google.gwt.user.client.ui.Widget;
public class ChunkPlotWidget extends Composite
implements EditorThemeListener
{
public ChunkPlotWidget(String url, NotebookPlotMetadata metadata,
final Command onRenderComplete, ChunkOutputSize chunkOutputSize)
{
plot_ = new Image();
url_ = url;
metadata_ = metadata;
chunkOutputSize_ = chunkOutputSize;
DOM.sinkEvents(plot_.getElement(), Event.ONLOAD);
DOM.setEventListener(plot_.getElement(),
new EventListener()
{
@Override
public void onBrowserEvent(Event event)
{
if (DOM.eventGetType(event) != Event.ONLOAD)
return;
// if the image is of fixed size, just clamp its width to the
// editor surface while preserving its aspect ratio
if (isFixedSizePlotUrl(plot_.getUrl()))
{
ImageElementEx img = plot_.getElement().cast();
img.getStyle().setProperty("height", "auto");
img.getStyle().setProperty("maxWidth", "100%");
}
plot_.setVisible(true);
if (onRenderComplete != null)
onRenderComplete.execute();
}
});
// start loading
plot_.setUrl(url);
Widget root = plot_;
if (isFixedSizePlotUrl(url))
{
if (chunkOutputSize_ == ChunkOutputSize.Full) {
HTMLPanel panel = new HTMLPanel("");
panel.add(plot_);
host_ = panel;
root = panel;
}
else {
// if the plot is of fixed size, emit it directly, but make it
// initially invisible until we get sizing information (as we may
// have to downsample)
plot_.setVisible(false);
}
}
else if (chunkOutputSize_ == ChunkOutputSize.Full)
{
HTMLPanel panel = new HTMLPanel("");
panel.getElement().getStyle().setWidth(100, Unit.PCT);
panel.getElement().getStyle().setProperty("display", "-ms-flexbox");
panel.getElement().getStyle().setProperty("display", "-webkit-flex");
panel.getElement().getStyle().setProperty("display", "flex");
panel.getElement().getStyle().setProperty("msFlexGrow", "1");
panel.getElement().getStyle().setProperty("webkitFlexGrow", "1");
panel.getElement().getStyle().setProperty("flexGrow", "1");
panel.getElement().getStyle().setProperty("backgroundImage", "url(\"" + url + "\")");
panel.getElement().getStyle().setProperty("backgroundSize", "100% 100%");
plotDiv_ = panel;
host_ = panel;
root = panel;
}
else
{
// if we can scale the plot, scale it
FixedRatioWidget fixedFrame = new FixedRatioWidget(plot_,
ChunkOutputUi.OUTPUT_ASPECT,
ChunkOutputUi.MAX_PLOT_WIDTH);
host_ = fixedFrame;
root = fixedFrame;
}
// if there's metadata to display, further wrap the widget with it
if (metadata != null && metadata.getConditions().length() > 0)
{
// otherwise, group with metadata
HTMLPanel outer = new HTMLPanel("");
conditions_ = new ChunkConditionBar(metadata.getConditions(), chunkOutputSize_);
conditions_.onEditorThemeChanged(ChunkOutputWidget.getEditorColors());
outer.add(conditions_);
outer.add(root);
outer.setWidth("100%");
if (chunkOutputSize_ == ChunkOutputSize.Full)
{
outer.getElement().getStyle().setProperty("display", "-ms-flexbox");
outer.getElement().getStyle().setProperty("display", "-webkit-flex");
outer.getElement().getStyle().setProperty("display", "flex");
outer.getElement().getStyle().setProperty("msFlexDirection", "column");
outer.getElement().getStyle().setProperty("webkitFlexDirection", "column");
outer.getElement().getStyle().setProperty("flexDirection", "column");
outer.getElement().getStyle().setProperty("msFlexGrow", "1");
outer.getElement().getStyle().setProperty("webkitFlexGrow", "1");
outer.getElement().getStyle().setProperty("flexGrow", "1");
}
else
{
outer.setHeight("100%");
}
root = outer;
}
initWidget(root);
}
@Override
public void onEditorThemeChanged(Colors colors)
{
if (conditions_ != null)
conditions_.onEditorThemeChanged(colors);
}
public Image imageWidget()
{
return plot_;
}
public String plotUrl()
{
return url_;
}
public NotebookPlotMetadata getMetadata()
{
return metadata_;
}
public static boolean isFixedSizePlotUrl(String url)
{
return url.contains("fixed_size=1");
}
public void updateImageUrl(String plotUrl, String pendingStyle)
{
String plotFile = FilePathUtils.friendlyFileName(plotUrl);
// get the existing URL and strip off the query string
String url = plot_.getUrl();
int idx = url.lastIndexOf('?');
if (idx > 0)
url = url.substring(0, idx);
// verify that the plot being refreshed is the same one this widget
// contains
if (FilePathUtils.friendlyFileName(url) != plotFile)
return;
if (host_ != null)
host_.removeStyleName(pendingStyle);
// the only purpose of this resize counter is to ensure that the
// plot URL changes when its geometry does (it's not consumed by
// the server)
String plotUrlRefresh = plotUrl + "?resize=" + resizeCounter_++;
plot_.setUrl(plotUrlRefresh);
if (plotDiv_ != null)
plotDiv_.getElement().getStyle().setProperty("backgroundImage", "url(\"" + plotUrlRefresh + "\")");
}
private static int resizeCounter_ = 0;
private final String url_;
private final Image plot_;
private HTMLPanel plotDiv_ = null;
private final NotebookPlotMetadata metadata_;
private final ChunkOutputSize chunkOutputSize_;
private Widget host_;
private ChunkConditionBar conditions_;
}