python/educational-core/course-creator/src/com/jetbrains/edu/coursecreator/actions/CCChangePlaceholderVisibility.java

   1 package com.jetbrains.edu.coursecreator.actions;
   2
   3 import com.intellij.openapi.actionSystem.AnActionEvent;
   4 import com.intellij.openapi.actionSystem.Presentation;
   5 import com.intellij.openapi.command.undo.BasicUndoableAction;
   6 import com.intellij.openapi.command.undo.UnexpectedUndoException;
   7 import com.jetbrains.edu.learning.StudyUtils;
   8 import com.jetbrains.edu.learning.core.EduUtils;
   9 import com.jetbrains.edu.learning.courseFormat.AnswerPlaceholder;
  10 import com.jetbrains.edu.learning.courseFormat.Task;
  11 import org.jetbrains.annotations.NotNull;
  12 import org.jetbrains.annotations.Nullable;
  13
  14 import java.util.Collections;
  15
  16 public abstract class CCChangePlaceholderVisibility extends CCAnswerPlaceholderAction {
  17
  18   protected CCChangePlaceholderVisibility(@Nullable String text, @Nullable String description) {
  19     super(text, description);
  20   }
  21
  22   @Override
  23   protected void performAnswerPlaceholderAction(@NotNull CCState state) {
  24     AnswerPlaceholder placeholder = state.getAnswerPlaceholder();
  25     if (placeholder == null) {
  26       return;
  27     }
  28     EduUtils.runUndoableAction(state.getProject(), getName(), new BasicUndoableAction(state.getEditor().getDocument()) {
  29       @Override
  30       public void undo() throws UnexpectedUndoException {
  31         setVisible(placeholder, isVisible(), state);
  32       }
  33
  34       @Override
  35       public void redo() throws UnexpectedUndoException {
  36         setVisible(placeholder, !isVisible(), state);
  37       }
  38     });
  39   }
  40
  41   private void setVisible(AnswerPlaceholder placeholder, boolean visible, CCState state) {
  42     placeholder.getActiveSubtaskInfo().setNeedInsertText(visible);
  43     int length = isVisible() ? placeholder.getTaskText().length() : 0;
  44     placeholder.setLength(length);
  45     StudyUtils.drawAllWindows(state.getEditor(), state.getTaskFile());
  46   }
  47
  48   protected abstract String getName();
  49
  50   protected abstract boolean isVisible();
  51
  52   @Override
  53   public void update(AnActionEvent e) {
  54     Presentation presentation = e.getPresentation();
  55     presentation.setEnabledAndVisible(false);
  56     CCState state = getState(e);
  57     if (state == null) {
  58       return;
  59     }
  60     AnswerPlaceholder placeholder = state.getAnswerPlaceholder();
  61     if (placeholder == null) {
  62       return;
  63     }
  64     Task task = state.getTaskFile().getTask();
  65     if (!task.hasSubtasks()) {
  66       return;
  67     }
  68     Integer minSubtaskIndex = Collections.min(placeholder.getSubtaskInfos().keySet());
  69     if (placeholder.isActive() && minSubtaskIndex != 0 && minSubtaskIndex == task.getActiveSubtaskIndex() && isAvailable(placeholder)) {
  70       presentation.setEnabledAndVisible(true);
  71     }
  72   }
  73
  74   protected abstract boolean isAvailable(AnswerPlaceholder placeholder);
  75 }