Autocompletion cancel at start position available to API.

Inverted default value to be compatible with older code.

4 files changed, 17 insertions, 1 deletions

diff --git a/include/Scintilla.h b/include/Scintilla.h
index e53931e0f..c452d3f20 100644
--- a/include/Scintilla.h
+++ b/include/Scintilla.h
@@ -208,6 +208,8 @@ void Scintilla_RegisterClasses(HINSTANCE hInstance);
 #define SCI_AUTOCSETSEPARATOR SCI_START + 106
 #define SCI_AUTOCGETSEPARATOR SCI_START + 107
 #define SCI_AUTOCSELECT SCI_START + 108
+#define SCI_AUTOCSETCANCELATSTART SCI_START + 110
+#define SCI_AUTOCGETCANCELATSTART SCI_START + 111
 
 #define SCI_GETTABWIDTH SCI_START + 121
 #define SCI_SETINDENT SCI_START + 122
diff --git a/include/Scintilla.iface b/include/Scintilla.iface
index ce52f1c70..df63dd387 100644
--- a/include/Scintilla.iface
+++ b/include/Scintilla.iface
@@ -422,6 +422,13 @@ get int AutoCGetSeparator=2107(,)
 # Select the item in the auto-completion list that starts with a string.
 fun void AutoCSelect=2108(, string text)
 
+# Should the auto-completion list be cancelled if the user backspaces to a 
+# position before where the box was created. 
+set void AutoCSetCancelAtStart=2110(bool cancel,)
+
+# Retrieve whether auto-completion cancelled by backspacing before start.
+get bool AutoCGetCancelAtStart=2111(,)
+
 # Set the number of spaces used for one level of indentation.
 set void SetIndent=2122(int indentSize,)
 
diff --git a/src/AutoComplete.cxx b/src/AutoComplete.cxx
index 00a3a75fc..d45ab27a6 100644
--- a/src/AutoComplete.cxx
+++ b/src/AutoComplete.cxx
@@ -16,7 +16,7 @@ AutoComplete::AutoComplete() {
 	posStart = 0;
 	strcpy(stopChars, "");
 	separator = ' ';
-	cancelAtStartPos = false;
+	cancelAtStartPos = true;
 }
 
 AutoComplete::~AutoComplete() {
diff --git a/src/ScintillaBase.cxx b/src/ScintillaBase.cxx
index f14426969..bf1b28394 100644
--- a/src/ScintillaBase.cxx
+++ b/src/ScintillaBase.cxx
@@ -351,6 +351,13 @@ LRESULT ScintillaBase::WndProc(UINT iMessage, WPARAM wParam, LPARAM lParam) {
 	case SCI_AUTOCSELECT:
 		ac.Select(reinterpret_cast<char *>(lParam));
 		break;
+	
+	case SCI_AUTOCSETCANCELATSTART:
+		ac.cancelAtStartPos = wParam;
+		break;
+	
+	case SCI_AUTOCGETCANCELATSTART:
+		return ac.cancelAtStartPos;
 
 	case SCI_CALLTIPSHOW: {
 			AutoCompleteCancel();