xml/dom-openapi/src/com/intellij/codeInsight/navigation/NavigationGutterIconRenderer.java

   1 /*
   2  * Copyright 2000-2010 JetBrains s.r.o.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  * http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16 package com.intellij.codeInsight.navigation;
  17
  18 import com.intellij.codeInsight.hint.HintUtil;
  19 import com.intellij.codeInsight.daemon.GutterIconNavigationHandler;
  20 import com.intellij.ide.util.PsiElementListCellRenderer;
  21 import com.intellij.openapi.actionSystem.AnAction;
  22 import com.intellij.openapi.actionSystem.AnActionEvent;
  23 import com.intellij.openapi.editor.markup.GutterIconRenderer;
  24 import com.intellij.openapi.ui.popup.JBPopupFactory;
  25 import com.intellij.openapi.ui.popup.JBPopup;
  26 import com.intellij.openapi.util.NotNullLazyValue;
  27 import com.intellij.psi.PsiElement;
  28 import com.intellij.psi.SmartPsiElementPointer;
  29 import com.intellij.ui.awt.RelativePoint;
  30 import com.intellij.util.NullableFunction;
  31 import com.intellij.util.PsiNavigateUtil;
  32 import com.intellij.util.containers.ContainerUtil;
  33 import org.jetbrains.annotations.Nullable;
  34
  35 import javax.swing.*;
  36 import java.awt.event.MouseEvent;
  37 import java.util.List;
  38
  39 /**
  40  * @author peter
  41  */
  42 public abstract class NavigationGutterIconRenderer extends GutterIconRenderer implements GutterIconNavigationHandler<PsiElement>{
  43   private final String myPopupTitle;
  44   private final String myEmptyText;
  45   private final PsiElementListCellRenderer myCellRenderer;
  46   private final NotNullLazyValue<List<SmartPsiElementPointer>> myPointers;
  47
  48   protected NavigationGutterIconRenderer(final String popupTitle, final String emptyText, final PsiElementListCellRenderer cellRenderer,
  49                                          final NotNullLazyValue<List<SmartPsiElementPointer>> pointers) {
  50     myPopupTitle = popupTitle;
  51     myEmptyText = emptyText;
  52     myCellRenderer = cellRenderer;
  53     myPointers = pointers;
  54   }
  55
  56   public boolean isNavigateAction() {
  57     return true;
  58   }
  59
  60   public List<PsiElement> getTargetElements() {
  61     return ContainerUtil.mapNotNull(myPointers.getValue(), new NullableFunction<SmartPsiElementPointer, PsiElement>() {
  62       public PsiElement fun(final SmartPsiElementPointer smartPsiElementPointer) {
  63         return smartPsiElementPointer.getElement();
  64       }
  65     });
  66   }
  67
  68   public boolean equals(final Object o) {
  69     if (this == o) return true;
  70     if (o == null || getClass() != o.getClass()) return false;
  71
  72     final NavigationGutterIconRenderer renderer = (NavigationGutterIconRenderer)o;
  73
  74     if (myCellRenderer != null ? !myCellRenderer.equals(renderer.myCellRenderer) : renderer.myCellRenderer != null) return false;
  75     if (myEmptyText != null ? !myEmptyText.equals(renderer.myEmptyText) : renderer.myEmptyText != null) return false;
  76     if (!myPointers.equals(renderer.myPointers)) return false;
  77     if (myPopupTitle != null ? !myPopupTitle.equals(renderer.myPopupTitle) : renderer.myPopupTitle != null) return false;
  78
  79     return true;
  80   }
  81
  82   public int hashCode() {
  83     int result;
  84     result = (myPopupTitle != null ? myPopupTitle.hashCode() : 0);
  85     result = 31 * result + (myEmptyText != null ? myEmptyText.hashCode() : 0);
  86     result = 31 * result + (myCellRenderer != null ? myCellRenderer.hashCode() : 0);
  87     result = 31 * result + myPointers.hashCode();
  88     return result;
  89   }
  90
  91   public PsiElementListCellRenderer getCellRenderer() {
  92     return myCellRenderer;
  93   }
  94
  95   @Nullable
  96   public AnAction getClickAction() {
  97     return new AnAction() {
  98       public void actionPerformed(AnActionEvent e) {
  99         navigate(e == null ? null : (MouseEvent)e.getInputEvent(), null);
 100       }
 101     };
 102   }
 103
 104   public void navigate(final MouseEvent event, final PsiElement elt) {
 105     final List<PsiElement> list = getTargetElements();
 106     if (list.isEmpty()) {
 107       if (myEmptyText != null) {
 108         final JLabel renderer = HintUtil.createErrorLabel(myEmptyText);
 109         final JBPopup popup = JBPopupFactory.getInstance().createComponentPopupBuilder(renderer, renderer).createPopup();
 110         if (event != null) {
 111           popup.show(new RelativePoint(event));
 112         }
 113       }
 114       return;
 115     }
 116     if (list.size() == 1) {
 117       PsiNavigateUtil.navigate(list.iterator().next());
 118     }
 119     else {
 120       final JBPopup popup = NavigationUtil.getPsiElementPopup(list.toArray(new PsiElement[list.size()]), myCellRenderer, myPopupTitle);
 121       if (event != null) {
 122         popup.show(new RelativePoint(event));
 123       }
 124     }
 125   }
 126 }