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WorkbenchTabPanel.java
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WorkbenchTabPanel.java
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/*
* WorkbenchTabPanel.java
*
* Copyright (C) 2009-12 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.ui;
import com.google.gwt.event.dom.client.ClickEvent;
import com.google.gwt.event.dom.client.ClickHandler;
import com.google.gwt.event.logical.shared.*;
import com.google.gwt.event.shared.HandlerRegistration;
import com.google.gwt.user.client.Command;
import com.google.gwt.user.client.ui.Composite;
import com.google.gwt.user.client.ui.ProvidesResize;
import com.google.gwt.user.client.ui.RequiresResize;
import com.google.gwt.user.client.ui.Widget;
import org.rstudio.core.client.HandlerRegistrations;
import org.rstudio.core.client.events.*;
import org.rstudio.core.client.theme.ModuleTabLayoutPanel;
import org.rstudio.core.client.theme.WindowFrame;
import java.util.ArrayList;
class WorkbenchTabPanel
extends Composite
implements RequiresResize,
ProvidesResize,
HasSelectionHandlers<Integer>,
HasEnsureVisibleHandlers
{
public WorkbenchTabPanel(WindowFrame owner)
{
tabPanel_ = new ModuleTabLayoutPanel(owner);
tabPanel_.setSize("100%", "100%");
tabPanel_.addStyleDependentName("Workbench");
initWidget(tabPanel_);
}
@Override
protected void onLoad()
{
super.onLoad();
releaseOnUnload_.add(tabPanel_.addBeforeSelectionHandler(new BeforeSelectionHandler<Integer>()
{
public void onBeforeSelection(BeforeSelectionEvent<Integer> event)
{
if (clearing_)
return;
if (getSelectedIndex() >= 0)
{
WorkbenchTab lastTab = tabs_.get(getSelectedIndex());
lastTab.onBeforeUnselected();
}
WorkbenchTab tab = tabs_.get(event.getItem().intValue());
tab.onBeforeSelected();
}
}));
releaseOnUnload_.add(tabPanel_.addSelectionHandler(new SelectionHandler<Integer>()
{
public void onSelection(SelectionEvent<Integer> event)
{
if (clearing_)
return;
WorkbenchTab pane = tabs_.get(event.getSelectedItem().intValue());
pane.onSelected();
}
}));
int selectedIndex = tabPanel_.getSelectedIndex();
if (selectedIndex >= 0)
{
WorkbenchTab tab = tabs_.get(selectedIndex);
tab.onBeforeSelected();
tab.onSelected();
}
}
@Override
protected void onUnload()
{
releaseOnUnload_.removeHandler();
super.onUnload();
}
public void setTabs(ArrayList<WorkbenchTab> tabs)
{
if (areTabsIdentical(tabs))
return;
tabPanel_.clear();
tabs_.clear();
for (WorkbenchTab tab : tabs)
add(tab);
}
private boolean areTabsIdentical(ArrayList<WorkbenchTab> tabs)
{
if (tabs_.size() != tabs.size())
return false;
// In case tab panels were removed implicitly (such as Console)
if (tabPanel_.getWidgetCount() != tabs.size())
return false;
for (int i = 0; i < tabs.size(); i++)
if (tabs_.get(i) != tabs.get(i))
return false;
return true;
}
private void add(final WorkbenchTab tab)
{
if (tab.isSuppressed())
return;
tabs_.add(tab);
final Widget widget = tab.asWidget();
tabPanel_.add(widget, tab.getTitle(), false, !tab.closeable() ? null : new ClickHandler()
{
@Override
public void onClick(ClickEvent event)
{
tab.confirmClose(new Command() {
@Override
public void execute()
{
tab.ensureHidden();
}
});
}
});
tab.addEnsureVisibleHandler(new EnsureVisibleHandler()
{
public void onEnsureVisible(EnsureVisibleEvent event)
{
// First ensure that we ourselves are visible
fireEvent(new EnsureVisibleEvent(event.getActivate()));
if (event.getActivate())
tabPanel_.selectTab(widget);
}
});
}
public void selectTab(int tabIndex)
{
if (tabPanel_.getSelectedIndex() == tabIndex)
{
// if it's already selected then we still want to fire the
// onBeforeSelected and onSelected methods (so that actions
// like auto-focus are always taken)
int selected = getSelectedIndex();
if (selected != -1)
{
WorkbenchTab tab = tabs_.get(selected);
tab.onBeforeSelected();
tab.onSelected();
}
return;
}
// deal with migrating from n+1 to n tabs, and with -1 values
int safeIndex = Math.min(Math.max(0, tabIndex), tabs_.size() - 1);
tabPanel_.selectTab(safeIndex);
}
public void selectTab(WorkbenchTab pane)
{
int index = tabs_.indexOf(pane);
if (index != -1)
selectTab(index);
else
{
String title = pane.getTitle();
for (int i = 0; i < tabs_.size(); i++)
{
WorkbenchTab tab = tabs_.get(i);
if (tab.getTitle().equals(title))
{
selectTab(i);
return;
}
}
}
}
public int getSelectedIndex()
{
return tabPanel_.getSelectedIndex();
}
public HandlerRegistration addSelectionHandler(
SelectionHandler<Integer> integerSelectionHandler)
{
return tabPanel_.addSelectionHandler(integerSelectionHandler);
}
public void onResize()
{
Widget w = getWidget();
if (w instanceof RequiresResize)
((RequiresResize)w).onResize();
}
public HandlerRegistration addEnsureVisibleHandler(
EnsureVisibleHandler handler)
{
return addHandler(handler, EnsureVisibleEvent.TYPE);
}
public void clear()
{
clearing_ = true;
tabPanel_.clear();
tabs_.clear();
clearing_ = false;
}
private ModuleTabLayoutPanel tabPanel_;
private ArrayList<WorkbenchTab> tabs_ = new ArrayList<WorkbenchTab>();
private final HandlerRegistrations releaseOnUnload_ = new HandlerRegistrations();
private boolean clearing_ = false;
}