Implement API to read and write undo history from applications.

4 files changed, 73 insertions, 0 deletions

diff --git a/include/Scintilla.h b/include/Scintilla.h
index 8c555352c..be537abad 100644
--- a/include/Scintilla.h
+++ b/include/Scintilla.h
@@ -339,6 +339,18 @@ typedef sptr_t (*SciFnDirectStatus)(sptr_t ptr, unsigned int iMessage, uptr_t wP
 #define SCI_GETCHARACTERCATEGORYOPTIMIZATION 2721
 #define SCI_BEGINUNDOACTION 2078
 #define SCI_ENDUNDOACTION 2079
+#define SCI_GETUNDOACTIONS 2790
+#define SCI_SETUNDOSAVEPOINT 2791
+#define SCI_GETUNDOSAVEPOINT 2792
+#define SCI_SETUNDOCURRENT 2793
+#define SCI_GETUNDOCURRENT 2794
+#define SCI_SETUNDOTENTATIVE 2795
+#define SCI_GETUNDOTENTATIVE 2796
+#define SCI_PUSHUNDOACTIONTYPE 2797
+#define SCI_CHANGELASTUNDOACTIONTEXT 2798
+#define SCI_GETUNDOACTIONTYPE 2799
+#define SCI_GETUNDOACTIONPOSITION 2800
+#define SCI_GETUNDOACTIONTEXT 2801
 #define INDIC_PLAIN 0
 #define INDIC_SQUIGGLE 1
 #define INDIC_TT 2
diff --git a/include/Scintilla.iface b/include/Scintilla.iface
index 918121596..dd7495a6f 100644
--- a/include/Scintilla.iface
+++ b/include/Scintilla.iface
@@ -833,6 +833,42 @@ fun void BeginUndoAction=2078(,)
 # End a sequence of actions that is undone and redone as a unit.
 fun void EndUndoAction=2079(,)
 
+# How many undo actions are in the history?
+get int GetUndoActions=2790(,)
+
+# Set action as the save point
+set void SetUndoSavePoint=2791(int action,)
+
+# Which action is the save point?
+get int GetUndoSavePoint=2792(,)
+
+# Set action as the current point
+set void SetUndoCurrent=2793(int action,)
+
+# Which action is the current point?
+get int GetUndoCurrent=2794(,)
+
+# Set action as the tentative point
+set void SetUndoTentative=2795(int action,)
+
+# Which action is the tentative point?
+get int GetUndoTentative=2796(,)
+
+# Push one action onto undo history with no text
+fun void PushUndoActionType=2797(int type, position pos)
+
+# Set the text and length of the most recently pushed action
+fun void ChangeLastUndoActionText=2798(position length, string text)
+
+# What is the type of an action?
+get int GetUndoActionType=2799(int action,)
+
+# What is the position of an action?
+get position GetUndoActionPosition=2800(int action,)
+
+# What is the text of an action?
+get int GetUndoActionText=2801(int action, stringresult text)
+
 # Indicator style enumeration and some constants
 enu IndicatorStyle=INDIC_
 val INDIC_PLAIN=0
diff --git a/include/ScintillaCall.h b/include/ScintillaCall.h
index 0ce4366d7..47122fcfe 100644
--- a/include/ScintillaCall.h
+++ b/include/ScintillaCall.h
@@ -245,6 +245,19 @@ public:
 	int CharacterCategoryOptimization();
 	void BeginUndoAction();
 	void EndUndoAction();
+	int UndoActions();
+	void SetUndoSavePoint(int action);
+	int UndoSavePoint();
+	void SetUndoCurrent(int action);
+	int UndoCurrent();
+	void SetUndoTentative(int action);
+	int UndoTentative();
+	void PushUndoActionType(int type, Position pos);
+	void ChangeLastUndoActionText(Position length, const char *text);
+	int UndoActionType(int action);
+	Position UndoActionPosition(int action);
+	int UndoActionText(int action, char *text);
+	std::string UndoActionText(int action);
 	void IndicSetStyle(int indicator, Scintilla::IndicatorStyle indicatorStyle);
 	Scintilla::IndicatorStyle IndicGetStyle(int indicator);
 	void IndicSetFore(int indicator, Colour fore);
diff --git a/include/ScintillaMessages.h b/include/ScintillaMessages.h
index 4b9421242..5cff5ed26 100644
--- a/include/ScintillaMessages.h
+++ b/include/ScintillaMessages.h
@@ -171,6 +171,18 @@ enum class Message {
 	GetCharacterCategoryOptimization = 2721,
 	BeginUndoAction = 2078,
 	EndUndoAction = 2079,
+	GetUndoActions = 2790,
+	SetUndoSavePoint = 2791,
+	GetUndoSavePoint = 2792,
+	SetUndoCurrent = 2793,
+	GetUndoCurrent = 2794,
+	SetUndoTentative = 2795,
+	GetUndoTentative = 2796,
+	PushUndoActionType = 2797,
+	ChangeLastUndoActionText = 2798,
+	GetUndoActionType = 2799,
+	GetUndoActionPosition = 2800,
+	GetUndoActionText = 2801,
 	IndicSetStyle = 2080,
 	IndicGetStyle = 2081,
 	IndicSetFore = 2082,