platform/lang-impl/src/com/intellij/codeInsight/lookup/impl/LookupManagerImpl.java

   1 /*
   2  * Copyright 2000-2009 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
  17 package com.intellij.codeInsight.lookup.impl;
  18
  19 import com.intellij.codeInsight.CodeInsightSettings;
  20 import com.intellij.codeInsight.completion.impl.CamelHumpMatcher;
  21 import com.intellij.codeInsight.daemon.DaemonCodeAnalyzer;
  22 import com.intellij.codeInsight.documentation.DocumentationManager;
  23 import com.intellij.codeInsight.hint.EditorHintListener;
  24 import com.intellij.codeInsight.hint.HintManager;
  25 import com.intellij.codeInsight.lookup.*;
  26 import com.intellij.openapi.Disposable;
  27 import com.intellij.openapi.components.ProjectComponent;
  28 import com.intellij.openapi.editor.Editor;
  29 import com.intellij.openapi.editor.EditorFactory;
  30 import com.intellij.openapi.editor.event.EditorFactoryAdapter;
  31 import com.intellij.openapi.editor.event.EditorFactoryEvent;
  32 import com.intellij.openapi.project.Project;
  33 import com.intellij.openapi.util.Disposer;
  34 import com.intellij.psi.PsiDocumentManager;
  35 import com.intellij.psi.PsiFile;
  36 import com.intellij.ui.LightweightHint;
  37 import com.intellij.util.Alarm;
  38 import com.intellij.util.messages.MessageBus;
  39 import org.jetbrains.annotations.NotNull;
  40
  41 import java.beans.PropertyChangeListener;
  42 import java.beans.PropertyChangeSupport;
  43
  44 public class LookupManagerImpl extends LookupManager implements ProjectComponent {
  45   private final Project myProject;
  46
  47   protected LookupImpl myActiveLookup = null;
  48   protected Editor myActiveLookupEditor = null;
  49   private final PropertyChangeSupport myPropertyChangeSupport = new PropertyChangeSupport(this);
  50
  51   private boolean myIsDisposed;
  52
  53   public LookupManagerImpl(Project project, MessageBus bus) {
  54     myProject = project;
  55
  56     bus.connect().subscribe(EditorHintListener.TOPIC, new EditorHintListener() {
  57       public void hintShown(final Project project, final LightweightHint hint, final int flags) {
  58         if (project == myProject) {
  59           Lookup lookup = getActiveLookup();
  60           if (lookup != null && (flags & HintManager.HIDE_BY_LOOKUP_ITEM_CHANGE) != 0) {
  61             lookup.addLookupListener(new LookupAdapter() {
  62               public void currentItemChanged(LookupEvent event) {
  63                 hint.hide();
  64               }
  65
  66               public void itemSelected(LookupEvent event) {
  67                 hint.hide();
  68               }
  69
  70               public void lookupCanceled(LookupEvent event) {
  71                 hint.hide();
  72               }
  73             });
  74           }
  75         }
  76       }
  77     });
  78
  79   }
  80
  81   @NotNull
  82   public String getComponentName() {
  83     return "LookupManager";
  84   }
  85
  86   public void initComponent() {
  87   }
  88
  89   public void disposeComponent() {
  90   }
  91
  92   public void projectOpened() {
  93
  94     final EditorFactoryAdapter myEditorFactoryListener = new EditorFactoryAdapter() {
  95       public void editorReleased(EditorFactoryEvent event) {
  96         if (event.getEditor() == myActiveLookupEditor) {
  97           hideActiveLookup();
  98         }
  99       }
 100     };
 101     EditorFactory.getInstance().addEditorFactoryListener(myEditorFactoryListener);
 102     Disposer.register(myProject, new Disposable() {
 103       public void dispose() {
 104         EditorFactory.getInstance().removeEditorFactoryListener(myEditorFactoryListener);
 105       }
 106     });
 107   }
 108
 109   public void projectClosed() {
 110     myIsDisposed = true;
 111   }
 112
 113   public Lookup showLookup(final Editor editor,
 114                            @NotNull LookupElement[] items,
 115                            final String prefix,
 116                            @NotNull final LookupArranger arranger) {
 117     final LookupImpl lookup = createLookup(editor, items, prefix, arranger);
 118     lookup.show();
 119     return lookup;
 120   }
 121
 122   public LookupImpl createLookup(final Editor editor,
 123                                  @NotNull LookupElement[] items,
 124                                  final String prefix,
 125                                  @NotNull final LookupArranger arranger) {
 126     hideActiveLookup();
 127
 128     final CodeInsightSettings settings = CodeInsightSettings.getInstance();
 129
 130     final PsiFile psiFile = PsiDocumentManager.getInstance(myProject).getPsiFile(editor.getDocument());
 131
 132     final Alarm alarm = new Alarm();
 133     final Runnable request = new Runnable() {
 134       public void run() {
 135         DocumentationManager.getInstance(myProject).showJavaDocInfo(editor, psiFile, false);
 136       }
 137     };
 138     if (settings.AUTO_POPUP_JAVADOC_INFO) {
 139       alarm.addRequest(request, settings.JAVADOC_INFO_DELAY);
 140     }
 141
 142     final DaemonCodeAnalyzer daemonCodeAnalyzer = DaemonCodeAnalyzer.getInstance(myProject);
 143     if (daemonCodeAnalyzer != null) {
 144       daemonCodeAnalyzer.setUpdateByTimerEnabled(false);
 145     }
 146     myActiveLookup = new LookupImpl(myProject, editor, arranger);
 147     myActiveLookupEditor = editor;
 148     myActiveLookup.addLookupListener(new LookupAdapter() {
 149       public void itemSelected(LookupEvent event) {
 150         dispose();
 151       }
 152
 153       public void lookupCanceled(LookupEvent event) {
 154         dispose();
 155       }
 156
 157       public void currentItemChanged(LookupEvent event) {
 158         alarm.cancelAllRequests();
 159         if (settings.AUTO_POPUP_JAVADOC_INFO) {
 160           alarm.addRequest(request, settings.JAVADOC_INFO_DELAY);
 161         }
 162       }
 163
 164       private void dispose() {
 165         alarm.cancelAllRequests();
 166         if (daemonCodeAnalyzer != null) {
 167           daemonCodeAnalyzer.setUpdateByTimerEnabled(true);
 168         }
 169         if (myActiveLookup == null) return;
 170         myActiveLookup.removeLookupListener(this);
 171         Lookup lookup = myActiveLookup;
 172         myActiveLookup = null;
 173         myActiveLookupEditor = null;
 174         myPropertyChangeSupport.firePropertyChange(PROP_ACTIVE_LOOKUP, lookup, null);
 175       }
 176     });
 177
 178     if (items.length > 0) {
 179       for (final LookupElement item : items) {
 180         if (prefix != null) {
 181           item.setPrefixMatcher(new CamelHumpMatcher(prefix));
 182         }
 183         myActiveLookup.addItem(item);
 184       }
 185       myActiveLookup.refreshUi();
 186     } else {
 187       alarm.cancelAllRequests(); // no items -> no doc
 188     }
 189
 190     myPropertyChangeSupport.firePropertyChange(PROP_ACTIVE_LOOKUP, null, myActiveLookup);
 191     return myActiveLookup;
 192   }
 193
 194   public void hideActiveLookup() {
 195     if (myActiveLookup != null) {
 196       myActiveLookup.hide();
 197     }
 198   }
 199
 200   public Lookup getActiveLookup() {
 201     return myActiveLookup;
 202   }
 203
 204   public void addPropertyChangeListener(PropertyChangeListener listener) {
 205     myPropertyChangeSupport.addPropertyChangeListener(listener);
 206   }
 207
 208   public void removePropertyChangeListener(PropertyChangeListener listener) {
 209     myPropertyChangeSupport.removePropertyChangeListener(listener);
 210   }
 211
 212   public boolean isDisposed() {
 213     return myIsDisposed;
 214   }
 215
 216 }