platform/platform-impl/src/com/intellij/openapi/wm/impl/SideStack.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 package com.intellij.openapi.wm.impl;
  17
  18 import com.intellij.openapi.diagnostic.Logger;
  19 import com.intellij.openapi.wm.ToolWindowAnchor;
  20
  21 import java.util.Iterator;
  22 import java.util.Stack;
  23
  24 /**
  25  * This is stack of tool window that were replaced by another tool windows.
  26  *
  27  * @author Vladimir Kondratyev
  28  */
  29 final class SideStack {
  30   private static final Logger LOG = Logger.getInstance("#com.intellij.openapi.wm.impl.SideStack");
  31   private final Stack myStack;
  32
  33   SideStack() {
  34     myStack = new Stack();
  35   }
  36
  37   /**
  38    * Pushes <code>info</code> into the stack. The method stores cloned copy of original <code>info</code>.
  39    */
  40   void push(final WindowInfoImpl info) {
  41     LOG.assertTrue(info.isDocked());
  42     LOG.assertTrue(!info.isAutoHide());
  43     myStack.push(info.copy());
  44   }
  45
  46   WindowInfoImpl pop(final ToolWindowAnchor anchor) {
  47     for (int i = myStack.size() - 1; true; i--) {
  48       final WindowInfoImpl info = (WindowInfoImpl)myStack.get(i);
  49       if (anchor == info.getAnchor()) {
  50         myStack.remove(i);
  51         return info;
  52       }
  53     }
  54   }
  55
  56   /**
  57    * @return <code>true</code> if and only if there is window in the state with the same
  58    *         <code>anchor</code> as the specified <code>info</code>.
  59    */
  60   boolean isEmpty(final ToolWindowAnchor anchor) {
  61     for (int i = myStack.size() - 1; i > -1; i--) {
  62       final WindowInfoImpl info = (WindowInfoImpl)myStack.get(i);
  63       if (anchor == info.getAnchor()) {
  64         return false;
  65       }
  66     }
  67     return true;
  68   }
  69
  70   /**
  71    * Removes all <code>WindowInfo</code>s with the specified <code>id</code>.
  72    */
  73   void remove(final String id) {
  74     for (Iterator i = myStack.iterator(); i.hasNext();) {
  75       final WindowInfoImpl info = (WindowInfoImpl)i.next();
  76       if (id.equals(info.getId())) {
  77         i.remove();
  78       }
  79     }
  80   }
  81
  82   void clear() {
  83     myStack.clear();
  84   }
  85 }