kmail/undostack.cpp

   1 /*
   2     This file is part of KMail
   3
   4     Copyright (C) 1999 Waldo Bastian (bastian@kde.org)
   5     Copyright (c) 2003 Zack Rusin <zack@kde.org>
   6
   7     This library is free software; you can redistribute it and/or
   8     modify it under the terms of the GNU General Public License
   9     version 2 as published by the Free Software Foundation.
  10
  11     This software is distributed in the hope that it will be useful,
  12     but WITHOUT ANY WARRANTY; without even the implied warranty of
  13     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  14     General Public License for more details.
  15
  16     You should have received a copy of the GNU General Public License
  17     along with this library; see the file COPYING. If not, write to
  18     the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  19     Boston, MA 02110-1301, USA.
  20 */
  21
  22 #include "undostack.h"
  23
  24 #include "kmmainwin.h"
  25 #include "kmkernel.h"
  26 #include <KJob>
  27 #include <AkonadiCore/itemmovejob.h>
  28
  29 #include <kmessagebox.h>
  30 #include <KLocalizedString>
  31 #include "kmail_debug.h"
  32
  33 #include <QList>
  34
  35 using namespace KMail;
  36
  37 UndoStack::UndoStack(int size)
  38     : QObject(Q_NULLPTR),
  39       mSize(size),
  40       mLastId(0),
  41       mCachedInfo(Q_NULLPTR)
  42 {
  43 }
  44
  45 UndoStack::~UndoStack()
  46 {
  47     clear();
  48 }
  49
  50 void UndoStack::clear()
  51 {
  52     qDeleteAll(mStack);
  53     mStack.clear();
  54 }
  55
  56 int UndoStack::size() const
  57 {
  58     return mStack.count();
  59 }
  60
  61 QString UndoStack::undoInfo() const
  62 {
  63     if (!mStack.isEmpty()) {
  64         UndoInfo *info = mStack.first();
  65         return info->moveToTrash ? i18n("Move To Trash") : i18np("Move Message", "Move Messages", info->items.count());
  66     } else {
  67         return QString();
  68     }
  69 }
  70
  71 int UndoStack::newUndoAction(const Akonadi::Collection &srcFolder, const Akonadi::Collection &destFolder)
  72 {
  73     UndoInfo *info = new UndoInfo;
  74     info->id         = ++mLastId;
  75     info->srcFolder  = srcFolder;
  76     info->destFolder = destFolder;
  77     info->moveToTrash = (destFolder == CommonKernel->trashCollectionFolder());
  78     if ((int) mStack.count() == mSize) {
  79         delete mStack.last();
  80         mStack.removeLast();
  81     }
  82     mStack.prepend(info);
  83     Q_EMIT undoStackChanged();
  84     return info->id;
  85 }
  86
  87 void UndoStack::addMsgToAction(int undoId, const Akonadi::Item &item)
  88 {
  89     if (!mCachedInfo || mCachedInfo->id != undoId) {
  90         QList<UndoInfo *>::const_iterator itr = mStack.constBegin();
  91         while (itr != mStack.constEnd()) {
  92             if ((*itr)->id == undoId) {
  93                 mCachedInfo = (*itr);
  94                 break;
  95             }
  96             ++itr;
  97         }
  98     }
  99
 100     Q_ASSERT(mCachedInfo);
 101     mCachedInfo->items.append(item);
 102 }
 103
 104 bool UndoStack::isEmpty() const
 105 {
 106     return mStack.isEmpty();
 107 }
 108
 109 void UndoStack::undo()
 110 {
 111     if (!mStack.isEmpty()) {
 112         UndoInfo *info = mStack.takeFirst();
 113         Q_EMIT undoStackChanged();
 114         Akonadi::ItemMoveJob *job = new Akonadi::ItemMoveJob(info->items, info->srcFolder, this);
 115         connect(job, &Akonadi::ItemMoveJob::result, this, &UndoStack::slotMoveResult);
 116         delete info;
 117     } else {
 118         // Sorry.. stack is empty..
 119         KMessageBox::sorry(kmkernel->mainWin(), i18n("There is nothing to undo."));
 120     }
 121 }
 122
 123 void UndoStack::slotMoveResult(KJob *job)
 124 {
 125     if (job->error()) {
 126         KMessageBox::sorry(kmkernel->mainWin(), i18n("Cannot move message. %1", job->errorString()));
 127     }
 128 }
 129
 130 void UndoStack::pushSingleAction(const Akonadi::Item &item, const Akonadi::Collection &folder, const Akonadi::Collection &destFolder)
 131 {
 132     const int id = newUndoAction(folder, destFolder);
 133     addMsgToAction(id, item);
 134 }
 135
 136 void UndoStack::folderDestroyed(const Akonadi::Collection &folder)
 137 {
 138     QList<UndoInfo *>::iterator it = mStack.begin();
 139     while (it != mStack.end()) {
 140         UndoInfo *info = *it;
 141         if (info &&
 142                 ((info->srcFolder == folder) ||
 143                  (info->destFolder == folder))) {
 144             delete info;
 145             it = mStack.erase(it);
 146         } else {
 147             ++it;
 148         }
 149     }
 150     Q_EMIT undoStackChanged();
 151 }
 152