Add a Prompt to Copy Only Differences in Folder Comparison

Src/DirActions.cpp

@@ -252,10 +252,11 @@ UPDATEITEM_TYPE UpdateDiffAfterOperation(const FileActionItem & act, CDiffContex
 	// UI dependent.
 	switch (act.UIResult)
 	{
-	case FileActionItem::UI_SYNC:
+	case FileActionItem::UI_COPY:
+	case FileActionItem::UI_COPY_DIFFITEMS:
 		bUpdateSrc = true;
 		bUpdateDest = true;
-		CopyDiffSideAndProperties(di, act.UIOrigin, act.UIDestination);
+		CopyDiffSideAndProperties(ctxt, di, act.UIOrigin, act.UIDestination, act.UIResult);
 		if (ctxt.GetCompareDirs() > 2)
 			SetDiffCompare(di, DIFFCODE::NOCMP);
 		else
@@ -266,7 +267,7 @@ UPDATEITEM_TYPE UpdateDiffAfterOperation(const FileActionItem & act, CDiffContex
 	case FileActionItem::UI_MOVE:
 		bUpdateSrc = true;
 		bUpdateDest = true;
-		CopyDiffSideAndProperties(di, act.UIOrigin, act.UIDestination);
+		CopyDiffSideAndProperties(ctxt, di, act.UIOrigin, act.UIDestination, act.UIResult);
 		UnsetDiffSide(ctxt, di, act.UIOrigin);
 		SetDiffCompare(di, DIFFCODE::NOCMP);
 		break;
@@ -356,13 +357,15 @@ DIFFITEM *FindItemFromPaths(const CDiffContext& ctxt, const PathContext& paths)
 	return 0;
 }
 
-/// is it possible to copy item to left ?
-bool IsItemCopyable(const DIFFITEM &di, int index)
+bool IsItemCopyable(const DIFFITEM &di, int index, bool copyOnlyDiffItems)
 {
-	// don't let them mess with error items
-	if (di.diffcode.isResultError()) return false;
-	// can't copy same items
-	if (di.diffcode.isResultSame()) return false;
+	if (copyOnlyDiffItems)
+	{
+		// don't let them mess with error items
+		if (di.diffcode.isResultError()) return false;
+		// can't copy same items
+		if (di.diffcode.isResultSame()) return false;
+	}
 	// impossible if not existing
 	if (!di.diffcode.exists(index)) return false;
 	// everything else can be copied to other side
@@ -1068,9 +1071,9 @@ int GetColImage(const DIFFITEM &di)
  * @note This does not update UI - ReloadItemStatus() does
  * @sa CDirDoc::ReloadItemStatus()
  */
-void CopyDiffSideAndProperties(DIFFITEM& di, int src, int dst)
+void CopyDiffSideAndProperties(CDiffContext& ctxt, DIFFITEM& di, int src, int dst, int action)
 {
-	if (di.diffcode.exists(src))
+	if (IsItemCopyable(di, src, action == FileActionItem::UI_COPY_DIFFITEMS))
 	{
 		di.diffcode.diffcode |= (DIFFCODE::FIRST << dst);
 		// copy file properties other than ctime 
@@ -1084,7 +1087,7 @@ void CopyDiffSideAndProperties(DIFFITEM& di, int src, int dst)
 	if (di.HasChildren())
 	{
 		for (DIFFITEM* pdic = di.GetFirstChild(); pdic; pdic = pdic->GetFwdSiblingLink())
-			CopyDiffSideAndProperties(*pdic, src, dst);
+			CopyDiffSideAndProperties(ctxt, *pdic, src, dst, action);
 	}
 }
 
@@ -1192,7 +1195,8 @@ int UpdateCompareFlagsAfterSync(DIFFITEM& di, bool bRecursive)
 			di.diffcode.diffcode |= flag;
 		}
 	}
-	else {
+	else
+	{
 		// Update compare flags for files and directories in tree mode.
 		// (Do not update directory compare flags when not in tree mode.)
 		if (!di.diffcode.isDirectory() || bRecursive)

Src/DirActions.h

@@ -139,7 +139,7 @@ UPDATEITEM_TYPE UpdateDiffAfterOperation(const FileActionItem & act, CDiffContex
 
 DIFFITEM *FindItemFromPaths(const CDiffContext& ctxt, const PathContext& paths);
 
-bool IsItemCopyable(const DIFFITEM &di, int index);
+bool IsItemCopyable(const DIFFITEM &di, int index, bool copyOnlyDiffItems);
 bool IsItemMovable(const DIFFITEM &di, int index);
 bool IsItemDeletable(const DIFFITEM &di, int index);
 bool IsItemDeletableOnBoth(const CDiffContext& ctxt, const DIFFITEM &di);
@@ -166,7 +166,7 @@ int GetColImage(const DIFFITEM &di);
 
 void SetDiffStatus(DIFFITEM& di, unsigned  diffcode, unsigned mask);
 void SetDiffCompare(DIFFITEM& di, unsigned diffcode);
-void CopyDiffSideAndProperties(DIFFITEM& di, int src, int dst);
+void CopyDiffSideAndProperties(CDiffContext& ctxt, DIFFITEM& di, int src, int dst, int action);
 void UnsetDiffSide(const CDiffContext& ctxt, DIFFITEM& di, int index);
 void UpdateStatusFromDisk(CDiffContext& ctxt, DIFFITEM& di, int index);
 int UpdateCompareFlagsAfterSync(DIFFITEM& di, bool bRecursive);
@@ -232,7 +232,7 @@ struct DirActions
 	template <SIDE_TYPE src, SIDE_TYPE dst>
 	bool IsItemCopyableOnTo(const DIFFITEM& di) const
 	{
-		return (di.diffcode.diffcode != 0 && !m_RO[SideToIndex(m_ctxt, dst)] && ::IsItemCopyable(di, SideToIndex(m_ctxt, src)));
+		return (di.diffcode.diffcode != 0 && !m_RO[SideToIndex(m_ctxt, dst)] && ::IsItemCopyable(di, SideToIndex(m_ctxt, src), false));
 	}
 
 	template <SIDE_TYPE src>
@@ -361,13 +361,31 @@ struct DirActions
 		return ::IsItemNavigableDiff(m_ctxt, di);
 	}
 
-	FileActionScript *CopyItem(FileActionScript *pscript, const std::pair<int, const DIFFITEM *>& it, SIDE_TYPE src, SIDE_TYPE dst) const
+	bool IsItemIdenticalOrSkipped(const DIFFITEM& di) const
+	{
+		if (!di.HasChildren())
+			return (di.diffcode.diffcode != 0 && (di.diffcode.isResultSame() || di.diffcode.isResultFiltered() || di.diffcode.isResultError()));
+		for (DIFFITEM* pdic = di.GetFirstChild(); pdic; pdic = pdic->GetFwdSiblingLink())
+		{
+			if (IsItemIdenticalOrSkipped(*pdic))
+				return true;
+		}
+		return false;
+	}
+
+	FileActionScript *CopyItem(FileActionScript *pscript, const std::pair<int, const DIFFITEM *>& it, bool copyOnlyDiffItems, SIDE_TYPE src, SIDE_TYPE dst) const
 	{
 		const DIFFITEM& di = *it.second;
 		const int srcidx = SideToIndex(m_ctxt, src);
 		const int dstidx = SideToIndex(m_ctxt, dst);
-		if (di.diffcode.diffcode != 0 && !m_RO[dstidx] && IsItemCopyable(di, srcidx))
+		if (di.diffcode.diffcode != 0 && !m_RO[dstidx] && IsItemCopyable(di, srcidx, copyOnlyDiffItems))
 		{
+			if (it.second->HasChildren())
+			{
+				for (DIFFITEM* pdic = di.GetFirstChild(); pdic; pdic = pdic->GetFwdSiblingLink())
+					CopyItem(pscript, { it.first, pdic }, copyOnlyDiffItems, src, dst);
+				return pscript;
+			}
 			FileActionItem act;
 			act.src  = GetItemFileName(m_ctxt, di, srcidx);
 			act.dest = GetItemFileName(m_ctxt, di, dstidx);
@@ -379,18 +397,24 @@ struct DirActions
 			act.context = it.first;
 			act.dirflag = di.diffcode.isDirectory();
 			act.atype = FileAction::ACT_COPY;
-			act.UIResult = FileActionItem::UI_SYNC;
+			act.UIResult = copyOnlyDiffItems ? FileActionItem::UI_COPY_DIFFITEMS : FileActionItem::UI_COPY;
 			act.UIOrigin = srcidx;
 			act.UIDestination = dstidx;
 			pscript->AddActionItem(act);
 		}
 		return pscript;
 	}
 
+	template<SIDE_TYPE src, SIDE_TYPE to>
+	FileActionScript *CopyDiffItems(FileActionScript *pscript, const std::pair<int, const DIFFITEM *>& it) const
+	{
+		return CopyItem(pscript, it, true, src, to);
+	}
+
 	template<SIDE_TYPE src, SIDE_TYPE to>
 	FileActionScript *Copy(FileActionScript *pscript, const std::pair<int, const DIFFITEM *>& it) const
 	{
-		return CopyItem(pscript, it, src, to);
+		return CopyItem(pscript, it, false, src, to);
 	}
 
 	FileActionScript *MoveItem(FileActionScript *pscript, const std::pair<int, const DIFFITEM *>& it, SIDE_TYPE src, SIDE_TYPE dst) const

Src/DirView.cpp

@@ -710,10 +710,7 @@ static void NTAPI FormatContextMenu(BCMenu *pPopup, UINT uIDItem, int n1, int n2
  */
 static void NTAPI CheckContextMenu(BCMenu *pPopup, UINT uIDItem, BOOL bCheck)
 {
-	if (bCheck)
-		pPopup->CheckMenuItem(uIDItem, MF_CHECKED);
-	else
-		pPopup->CheckMenuItem(uIDItem, MF_UNCHECKED);
+	pPopup->CheckMenuItem(uIDItem, bCheck ? MF_CHECKED : MF_UNCHECKED);
 }
 
 /**
@@ -831,9 +828,9 @@ void CDirView::OnDirCopy(UINT id)
 	if (GetDocument()->m_nDirs < 3)
 	{
 		if (to_right)
-			DoDirAction(&DirActions::Copy<SIDE_LEFT, SIDE_RIGHT>, _("Copying files..."));
+			OnCtxtDirCopy<SIDE_LEFT, SIDE_RIGHT>();
 		else
-			DoDirAction(&DirActions::Copy<SIDE_RIGHT, SIDE_LEFT>, _("Copying files..."));
+			OnCtxtDirCopy<SIDE_RIGHT, SIDE_LEFT>();
 	}
 	else
 	{
@@ -842,11 +839,11 @@ void CDirView::OnDirCopy(UINT id)
 			switch (m_nActivePane)
 			{
 			case 0:
-				DoDirAction(&DirActions::Copy<SIDE_LEFT, SIDE_MIDDLE>, _("Copying files..."));
+				OnCtxtDirCopy<SIDE_LEFT, SIDE_MIDDLE>();
 				break;
 			case 1:
 			case 2:
-				DoDirAction(&DirActions::Copy<SIDE_MIDDLE, SIDE_RIGHT>, _("Copying files..."));
+				OnCtxtDirCopy<SIDE_MIDDLE, SIDE_RIGHT>();
 				break;
 			}
 		}
@@ -856,10 +853,10 @@ void CDirView::OnDirCopy(UINT id)
 			{
 			case 0:
 			case 1:
-				DoDirAction(&DirActions::Copy<SIDE_MIDDLE, SIDE_LEFT>, _("Copying files..."));
+				OnCtxtDirCopy<SIDE_MIDDLE, SIDE_LEFT>();
 				break;
 			case 2:
-				DoDirAction(&DirActions::Copy<SIDE_RIGHT, SIDE_MIDDLE>, _("Copying files..."));
+				OnCtxtDirCopy<SIDE_RIGHT, SIDE_MIDDLE>();
 				break;
 			}
 		}
@@ -870,7 +867,20 @@ void CDirView::OnDirCopy(UINT id)
 template<SIDE_TYPE srctype, SIDE_TYPE dsttype>
 void CDirView::OnCtxtDirCopy()
 {
-	DoDirAction(&DirActions::Copy<srctype, dsttype>, _("Copying files..."));
+	bool copyOnlyDiffItems = true;
+	Counts counts = Count(&DirActions::IsItemIdenticalOrSkipped);
+	if (counts.count > 0)
+	{
+		int ans = AfxMessageBox(_("Some selected items are identical or skipped.\nDo you want to copy only the items with differences?").c_str(),
+			MB_YESNOCANCEL | MB_ICONWARNING | MB_DONT_ASK_AGAIN, IDS_COPY_ONLYDIFFITEMS);
+		if (ans == IDCANCEL)
+			return;
+		copyOnlyDiffItems = (ans == IDYES);
+	}
+	if (copyOnlyDiffItems)
+		DoDirAction(&DirActions::CopyDiffItems<srctype, dsttype>, _("Copying files..."));
+	else
+		DoDirAction(&DirActions::Copy<srctype, dsttype>, _("Copying files..."));
 }
 
 /// User chose (context menu) Copy left to...
@@ -941,6 +951,7 @@ void CDirView::DoDirAction(DirActions::method_type func, const String& status_me
 		FileActionScript *rsltScript;
 		rsltScript = std::accumulate(begin, end, &actionScript, MakeDirActions(func));
 		ASSERT(rsltScript == &actionScript);
+		actionScript.RemoveDuplicates();
 		// Now we prompt, and execute actions
 		ConfirmAndPerformActions(actionScript);
 	} catch (ContentsChangedException& e) {
@@ -978,6 +989,7 @@ void CDirView::DoDirActionTo(SIDE_TYPE stype, DirActions::method_type func, cons
 		FileActionScript *rsltScript;
 		rsltScript = std::accumulate(begin, end, &actionScript, MakeDirActions(func));
 		ASSERT(rsltScript == &actionScript);
+		actionScript.RemoveDuplicates();
 		// Now we prompt, and execute actions
 		ConfirmAndPerformActions(actionScript);
 	} catch (ContentsChangedException& e) {

Src/DirView.h

@@ -136,6 +136,7 @@ class CDirView : public CListView
 	void DoOpenWithEditor(SIDE_TYPE stype);
 	void DoOpenParentFolder(SIDE_TYPE stype);
 	void DoUpdateOpen(SELECTIONTYPE selectionType, CCmdUI* pCmdUI, bool openableForDir = true);
+	void RemoveDuplicatedActions(FileActionScript & actions);
 	void ConfirmAndPerformActions(FileActionScript & actions);
 	void PerformActionList(FileActionScript & actions);
 	void UpdateAfterFileScript(FileActionScript & actionList);

Src/FileActionScript.cpp

@@ -51,6 +51,24 @@ FileActionItem FileActionScript::RemoveTailActionItem()
 	return item;
 }
 
+/**
+ * @brief Removes duplicate entries from a vector of FileActionItem objects.
+ */
+void FileActionScript::RemoveDuplicates()
+{
+	auto compare = [](const FileActionItem& a, const FileActionItem& b) {
+		return std::tie(a.src, a.dest, a.atype) < std::tie(b.src, b.dest, b.atype);
+		};
+
+	auto equal = [](const FileActionItem& a, const FileActionItem& b) {
+		return std::tie(a.src, a.dest, a.atype) == std::tie(b.src, b.dest, b.atype);
+		};
+
+	std::sort(m_actions.begin(), m_actions.end(), compare);
+
+	m_actions.erase(std::unique(m_actions.begin(), m_actions.end(), equal), m_actions.end());
+}
+
 /**
  * @brief Create ShellFileOperations operation lists from our scripts.
  *

Src/FileActionScript.h

@@ -64,11 +64,12 @@ struct FileActionItem : public FileAction
 	 */
 	enum UI_RESULT
 	{
-		UI_SYNC = 1,   /**< Make items identical (synchronized). */
-		UI_MOVE,       /**< Move items. */
-		UI_DEL,        /**< Remove left item. */
-		UI_DONT_CARE,  /**< Ignore the GUI change. */
-		UI_RENAME      /**< Rename item. */
+		UI_COPY = 1,       /**< Copy items. */
+		UI_COPY_DIFFITEMS, /**< Copy diff items. */
+		UI_MOVE,           /**< Move items. */
+		UI_DEL,            /**< Remove left item. */
+		UI_DONT_CARE,      /**< Ignore the GUI change. */
+		UI_RENAME          /**< Rename item. */
 	};
 
 	/**
@@ -109,6 +110,7 @@ class FileActionScript
 	void AddActionItem(FileActionItem & item) { m_actions.push_back(item); }
 
 	FileActionItem RemoveTailActionItem();
+	void RemoveDuplicates();
 
 	/**
 	 * Get first action item in the list.

Src/Merge.rc

@@ -3809,6 +3809,7 @@ BEGIN
     IDS_COPY_BOTH_TO2       "Both to... (%1 of %2)"
     IDS_COPY_ALL_TO2        "All to... (%1 of %2)"
     IDS_COPY_DIFFERENCES_TO2 "Differences to... (%1 of %2)"
+    IDS_COPY_ONLYDIFFITEMS  "Some selected items are identical or skipped.\nDo you want to copy only the items with differences?"
 END
 
 // DIRECTORY DIFFING : FILE COPY/DELETE (WITHOUT/WITH NUMBER MARK)  (2)

Src/PropMessageBoxes.cpp

@@ -43,6 +43,7 @@ static struct MessageBox
 	{ IDS_MOVE_TO_LASTFILE, IDS_MOVE_TO_LASTFILE, nullptr, MB_YESNO | MB_DONT_ASK_AGAIN },
 	{ IDS_MOVE_TO_NEXTPAGE, IDS_MOVE_TO_NEXTPAGE, nullptr, MB_YESNO | MB_DONT_ASK_AGAIN },
 	{ IDS_MOVE_TO_PREVPAGE, IDS_MOVE_TO_PREVPAGE, nullptr, MB_YESNO | MB_DONT_ASK_AGAIN },
+	{ IDS_COPY_ONLYDIFFITEMS, IDS_COPY_ONLYDIFFITEMS, nullptr, MB_YESNOCANCEL | MB_ICONWARNING | MB_DONT_ASK_AGAIN },
 	// report dialog
 	{ IDS_REPORT_FILEOVERWRITE, IDS_REPORT_FILEOVERWRITE, nullptr, MB_YESNO | MB_ICONWARNING | MB_DONT_ASK_AGAIN },
 	// patch dialog

Src/resource.h

@@ -1801,6 +1801,7 @@
 #define IDS_COPY_GRANULARITY_LINE       44643
 #define IDS_COPY_GRANULARITY_Character  44644
 #define IDS_VIEW_MENU_BAR               44645
+#define IDS_COPY_ONLYDIFFITEMS          44646
 
 // Next default values for new objects
 // 

Translations/WinMerge/Arabic.po

@@ -2956,6 +2956,9 @@ msgstr "الكل إلى... (%1)"
 msgid "Differences to... (%1)"
 msgstr "الاختلافات إلى... (%1)"
 
+msgid "Some selected items are identical or skipped.\nDo you want to copy only the items with differences?"
+msgstr ""
+
 #, c-format
 msgid "Left (%1)"
 msgstr "اليسار (%1)"

Translations/WinMerge/Basque.po

@@ -3478,6 +3478,9 @@ msgstr ""
 msgid "Differences to... (%1)"
 msgstr ""
 
+msgid "Some selected items are identical or skipped.\nDo you want to copy only the items with differences?"
+msgstr ""
+
 #, c-format
 msgid "Left (%1)"
 msgstr "Ezkerra (%1)"

Translations/WinMerge/Brazilian.po

@@ -2766,6 +2766,9 @@ msgstr "De Todos pra... (%1)"
 msgid "Differences to... (%1)"
 msgstr "Das Diferenças pra... (%1)"
 
+msgid "Some selected items are identical or skipped.\nDo you want to copy only the items with differences?"
+msgstr ""
+
 #, c-format
 msgid "Left (%1)"
 msgstr "Esquerda (%1)"

Translations/WinMerge/Bulgarian.po

@@ -2975,6 +2975,9 @@ msgstr "Всички към… (%1)"
 msgid "Differences to... (%1)"
 msgstr "Различия към… (%1)"
 
+msgid "Some selected items are identical or skipped.\nDo you want to copy only the items with differences?"
+msgstr ""
+
 #, c-format
 msgid "Left (%1)"
 msgstr "Ляво (%1)"

Translations/WinMerge/Catalan.po

@@ -3538,6 +3538,9 @@ msgstr "Tots a... (%1)"
 msgid "Differences to... (%1)"
 msgstr "Diferències a... (%1)"
 
+msgid "Some selected items are identical or skipped.\nDo you want to copy only the items with differences?"
+msgstr ""
+
 #, c-format
 msgid "Left (%1)"
 msgstr "Esquerra (%1)"

Translations/WinMerge/ChineseSimplified.po

@@ -3000,6 +3000,9 @@ msgstr "全部到... (%1)"
 msgid "Differences to... (%1)"
 msgstr "差异到... (%1)"
 
+msgid "Some selected items are identical or skipped.\nDo you want to copy only the items with differences?"
+msgstr ""
+
 #, c-format
 msgid "Left (%1)"
 msgstr "左侧 (%1)"