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package com.jetbrains.python.edu.actions;
import com.jetbrains.python.edu.StudyUtils;
import com.jetbrains.python.edu.course.TaskWindow;
import icons.StudyIcons;
import org.jetbrains.annotations.NotNull;
import org.jetbrains.annotations.Nullable;
import java.util.List;
/**
* author: liana
* data: 6/30/14.
*/
public class StudyPrevWindowAction extends StudyWindowNavigationAction {
public static final String ACTION_ID = "PrevWindowAction";
public static final String SHORTCUT = "ctrl pressed COMMA";
public StudyPrevWindowAction() {
super("PrevWindowAction", "Select previous window", StudyIcons.Prev);
}
@Nullable
@Override
protected TaskWindow getNextTaskWindow(@NotNull final TaskWindow window) {
int prevIndex = window.getIndex() - 1;
List<TaskWindow> windows = window.getTaskFile().getTaskWindows();
if (StudyUtils.indexIsValid(prevIndex, windows)) {
return windows.get(prevIndex);
}
return null;
}
}
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