From 77fd8e102a3775ac0683ee4d3ce6fd17977fd24e Mon Sep 17 00:00:00 2001
From: Marc Mutz <mutz@kde.org>
Date: Mon, 25 May 2009 09:48:49 +0000
Subject: [PATCH] Async KMail Reader (3/5): Allow storing of BodyPartMemento's
 in KMReader. This lets selected BodyPartMementos transcend the (temporary)
 partNode hierarchy in KMReader which is destroyed on every parseMsg()

svn path=/branches/kdepim/enterprise/kdepim/; revision=972556
---
 kmreaderwin.cpp | 48 +++++++++++++++++++++++++++++++++++++++++++++++-
 kmreaderwin.h   | 19 ++++++++++++++++++-
 2 files changed, 65 insertions(+), 2 deletions(-)

diff --git a/kmreaderwin.cpp b/kmreaderwin.cpp
index ebe7efc1c..5d90fbcb6 100644
--- a/kmreaderwin.cpp
+++ b/kmreaderwin.cpp
@@ -1197,9 +1197,10 @@ void KMReaderWin::setMsg(KMMessage* aMsg, bool force)
       kdDebug(5006) << "(" << aMsg->getMsgSerNum() << ", last " << mLastSerNum << ") " << aMsg->subject() << " "
         << aMsg->fromStrip() << ", readyToShow " << (aMsg->readyToShow()) << endl;
 
-	//Reset the level quote if the msg has changed.
+  // Reset message-transient state
   if (aMsg && aMsg->getMsgSerNum() != mLastSerNum ){
     mLevelQuote = GlobalSettings::self()->collapseQuoteLevelSpin()-1;
+    clearBodyPartMementos();
   }
   if ( mPrinting )
     mLevelQuote = -1;
@@ -2780,6 +2781,51 @@ QString KMReaderWin::renderAttachments(partNode * node, const QColor &bgColor )
   return html;
 }
 
+using namespace KMail::Interface;
+
+void KMReaderWin::setBodyPartMemento( const partNode * node, const QCString & which, BodyPartMemento * memento )
+{
+  const QCString index = node->path() + ':' + which.lower();
+
+  const std::map<QCString,BodyPartMemento*>::iterator it = mBodyPartMementoMap.lower_bound( index );
+  if ( it != mBodyPartMementoMap.end() && it->first == index ) {
+
+    if ( memento && memento == it->second )
+      return;
+
+    delete it->second;
+
+    if ( memento )
+      it->second = memento;
+    else
+      mBodyPartMementoMap.erase( it );
+
+  } else {
+    if ( memento )
+      mBodyPartMementoMap.insert( it, std::make_pair( index, memento ) );
+  }
+
+  if ( Observable * o = memento ? memento->asObservable() : 0 )
+    o->attach( this );
+}
+
+BodyPartMemento * KMReaderWin::bodyPartMemento( const partNode * node, const QCString & which ) const
+{
+  const QCString index = node->path() + ':' + which.lower();
+  const std::map<QCString,BodyPartMemento*>::const_iterator it = mBodyPartMementoMap.find( index );
+  if ( it == mBodyPartMementoMap.end() )
+    return 0;
+  else
+    return it->second;
+}
+
+void KMReaderWin::clearBodyPartMementos()
+{
+  for ( std::map<QCString,BodyPartMemento*>::const_iterator it = mBodyPartMementoMap.begin(), end = mBodyPartMementoMap.end() ; it != end ; ++it )
+    delete it->second;
+  mBodyPartMementoMap.clear();
+}
+
 #include "kmreaderwin.moc"
 
 
diff --git a/kmreaderwin.h b/kmreaderwin.h
index 45e500c00..aa70d1dec 100644
--- a/kmreaderwin.h
+++ b/kmreaderwin.h
@@ -14,6 +14,8 @@
 #include "kmmimeparttree.h" // Needed for friend declaration.
 #include "interfaces/observer.h"
 
+#include <map>
+
 class QFrame;
 class QSplitter;
 class QHBox;
@@ -42,6 +44,7 @@ class KMMessagePart;
 namespace KMail {
   namespace Interface {
     class Observable;
+    class BodyPartMemento;
   }
   class PartMetaData;
   class ObjectTreeParser;
@@ -302,6 +305,19 @@ public:
   /* show or hide the list that points to the attachments */
   void setShowAttachmentQuicklist( bool showAttachmentQuicklist = true ) { mShowAttachmentQuicklist = showAttachmentQuicklist; }
 
+  /* retrieve BodyPartMemento of id \a which for partNode \a node */
+  KMail::Interface::BodyPartMemento * bodyPartMemento( const partNode * node, const QCString & which ) const;
+
+  /* set/replace BodyPartMemento \a memento of id \a which for
+     partNode \a node. If there was a BodyPartMemento registered
+     already, replaces (deletes) that one. */
+  void setBodyPartMemento( const partNode * node, const QCString & which, KMail::Interface::BodyPartMemento * memento );
+
+private:
+  /* deletes all BodyPartMementos. Use this when skipping to another
+     message (as opposed to re-loading the same one again). */
+  void clearBodyPartMementos();
+
 signals:
   /** Emitted after parsing of a message to have it stored
       in unencrypted state in it's folder. */
@@ -530,12 +546,13 @@ private:
   KToggleAction *mToggleFixFontAction;
   KURL mUrlClicked;
   KMail::HtmlWriter * mHtmlWriter;
+  std::map<QCString,KMail::Interface::BodyPartMemento*> mBodyPartMementoMap;
   // an attachment should be updated
   bool mAtmUpdate;
   int mChoice;
   unsigned long mWaitingForSerNum;
   float mSavedRelativePosition;
-	int mLevelQuote;
+  int mLevelQuote;
   bool mDecrytMessageOverwrite;
   bool mShowSignatureDetails;
   bool mShowAttachmentQuicklist;