Distinguish between settings and explicit override for external content

Summary:
This will allow KMail to properly communicate the difference also when
using per-folder settings for loading external references. This in turn
makes 746e02af07 also work in that case.

Taken from KDE patches and adapted to TDE.
See https://phabricator.kde.org/D12393 and https://phabricator.kde.org/D12394

Signed-off-by: Slávek Banko <slavek.banko@axis.cz>
(cherry picked from commit c8e1b254e2)

kmail/kmmainwidget.cpp

@@ -1386,7 +1386,7 @@ void KMMainWidget::slotOverrideHtmlLoadExt()
   }
   mFolderHtmlLoadExtPref = !mFolderHtmlLoadExtPref;
   if (mMsgView) {
-    mMsgView->setHtmlLoadExtOverride(mFolderHtmlLoadExtPref);
+    mMsgView->setHtmlLoadExtDefault(mFolderHtmlLoadExtPref);
     mMsgView->update( true );
   }
 }
@@ -2084,7 +2084,7 @@ void KMMainWidget::folderSelected( KMFolder* aFolder, bool forceJumpToUnread )
   if (mMsgView)
   {
     mMsgView->setHtmlOverride(mFolderHtmlPref);
-    mMsgView->setHtmlLoadExtOverride(mFolderHtmlLoadExtPref);
+    mMsgView->setHtmlLoadExtDefault(mFolderHtmlLoadExtPref);
   }
   mHeaders->setFolder( mFolder, forceJumpToUnread );
   updateMessageActions();
@@ -2140,7 +2140,8 @@ void KMMainWidget::slotMsgSelected(KMMessage *msg)
   }
   // reset HTML override to the folder setting
   mMsgView->setHtmlOverride(mFolderHtmlPref);
-  mMsgView->setHtmlLoadExtOverride(mFolderHtmlLoadExtPref);
+  mMsgView->setHtmlLoadExtDefault(mFolderHtmlLoadExtPref);
+  mMsgView->setHtmlLoadExtOverride(false);
   mMsgView->setDecryptMessageOverwrite( false );
   mMsgView->setShowSignatureDetails( false );
 }

kmail/kmreadermainwin.cpp

@@ -50,7 +50,7 @@
 
 #include "kmreadermainwin.h"
 
-KMReaderMainWin::KMReaderMainWin( bool htmlOverride, bool htmlLoadExtOverride,
+KMReaderMainWin::KMReaderMainWin( bool htmlOverride, bool htmlLoadExtDefault,
                                   char *name )
   : KMail::SecondaryWindow( name ? name : "readerwindow#" ),
     mMsg( 0 )
@@ -59,7 +59,7 @@ KMReaderMainWin::KMReaderMainWin( bool htmlOverride, bool htmlLoadExtOverride,
   //mReaderWin->setShowCompleteMessage( true );
   mReaderWin->setAutoDelete( true );
   mReaderWin->setHtmlOverride( htmlOverride );
-  mReaderWin->setHtmlLoadExtOverride( htmlLoadExtOverride );
+  mReaderWin->setHtmlLoadExtDefault( htmlLoadExtDefault );
   mReaderWin->setDecryptMessageOverwrite( true );
   mReaderWin->setShowSignatureDetails( false );
   initKMReaderMainWin();

kmail/kmreadermainwin.h

@@ -26,7 +26,7 @@ class KMReaderMainWin : public KMail::SecondaryWindow
   
 
 public:
-  KMReaderMainWin( bool htmlOverride, bool htmlLoadExtOverride, char *name = 0 );
+  KMReaderMainWin( bool htmlOverride, bool htmlLoadExtDefault, char *name = 0 );
   KMReaderMainWin( char *name = 0 );
   KMReaderMainWin(KMMessagePart* aMsgPart,
     bool aHTML, const TQString& aFileName, const TQString& pname,

kmail/kmreaderwin.cpp

@@ -462,6 +462,7 @@ KMReaderWin::KMReaderWin(TQWidget *aParent,
   readConfig();
 
   mHtmlOverride = false;
+  mHtmlLoadExtDefault = false;
   mHtmlLoadExtOverride = false;
 
   mLevelQuote = GlobalSettings::self()->collapseQuoteLevelSpin() - 1;
@@ -895,7 +896,6 @@ void KMReaderWin::readConfig(void)
     mToggleFixFontAction->setChecked( mUseFixedFont );
 
   mHtmlMail = reader.readBoolEntry( "htmlMail", false );
-  mHtmlLoadExternal = reader.readBoolEntry( "htmlLoadExternal", false );
 
   setHeaderStyleAndStrategy( HeaderStyle::create( reader.readEntry( "header-style", "fancy" ) ),
 			     HeaderStrategy::create( reader.readEntry( "header-set-displayed", "rich" ) ) );
@@ -2471,11 +2471,14 @@ void KMReaderWin::setHtmlOverride(bool override)
 
 
 //-----------------------------------------------------------------------------
-void KMReaderWin::setHtmlLoadExtOverride(bool override)
+void KMReaderWin::setHtmlLoadExtDefault(bool loadExtDefault)
 {
-  mHtmlLoadExtOverride = override;
-  //if (message())
-  //    message()->setDecodeHTML(htmlMail());
+	mHtmlLoadExtDefault = loadExtDefault;
+}
+
+void KMReaderWin::setHtmlLoadExtOverride(bool loadExtOverride)
+{
+	mHtmlLoadExtOverride = loadExtOverride;
 }
 
 
@@ -2500,8 +2503,8 @@ bool KMReaderWin::htmlLoadExternal()
 		return mHtmlLoadExtOverride;
 	}
 
-	return ((mHtmlLoadExternal && !mHtmlLoadExtOverride) ||
-	        (!mHtmlLoadExternal && mHtmlLoadExtOverride));
+	return ((mHtmlLoadExtDefault && !mHtmlLoadExtOverride) ||
+	        (!mHtmlLoadExtDefault && mHtmlLoadExtOverride));
 }
 
 

kmail/kmreaderwin.h

@@ -199,9 +199,22 @@ public:
   bool htmlOverride() const { return mHtmlOverride; }
   void setHtmlOverride( bool override );
 
-  /** Override default load external references setting */
+  /** Get the load external references override setting */
   bool htmlLoadExtOverride() const { return mHtmlLoadExtOverride; }
-  void setHtmlLoadExtOverride( bool override );
+
+  /** Default behavior for loading external references.
+   *  Use this for specifying the external reference loading behavior as
+   *  specified in the user settings.
+   *  @see setHtmlLoadExtOverride
+   */
+  void setHtmlLoadExtDefault(bool loadExtDefault);
+
+  /** Override default load external references setting
+   *  @warning This must only be called when the user has explicitly
+   *  been asked to retrieve external references!
+   *  @see setHtmlLoadExtDefault
+   */
+  void setHtmlLoadExtOverride(bool loadExtOverride);
 
   /** Is html mail to be supported? Takes into account override */
   bool htmlMail();
@@ -540,7 +553,7 @@ private:
   TQString renderAttachments( partNode *node, const TQColor &bgColor );
 
 private:
-  bool mHtmlMail, mHtmlLoadExternal, mHtmlOverride, mHtmlLoadExtOverride;
+  bool mHtmlMail, mHtmlLoadExtDefault, mHtmlOverride, mHtmlLoadExtOverride;
   int mAtmCurrent;
   TQString mAtmCurrentName;
   KMMessage *mMessage;