fixes #3768 (NewStory: добавить опцию сдвига выделения при прокрутке стрелками)

2 files changed, 43 insertions, 5 deletions

diff --git a/plugins/NewStory/src/history_control.cpp b/plugins/NewStory/src/history_control.cpp
index f78c812209..30c674c451 100644
--- a/plugins/NewStory/src/history_control.cpp
+++ b/plugins/NewStory/src/history_control.cpp
@@ -704,7 +704,7 @@ void NewstoryListData::ToggleSelection(int iFirst, int iLast)
 }
 
 /////////////////////////////////////////////////////////////////////////////////////////
-// Navigation
+// Navigation by coordinates
 
 void NewstoryListData::LineUp()
 {
@@ -730,6 +730,40 @@ void NewstoryListData::PageDown()
 		ScrollDown(cachedWindowHeight);
 }
 
+/////////////////////////////////////////////////////////////////////////////////////////
+// Navigation by events
+
+void NewstoryListData::EventUp()
+{
+	if (caret > 0)
+		SetPos(caret - 1);
+}
+
+void NewstoryListData::EventDown()
+{
+	if (caret < totalCount-1)
+		SetPos(caret + 1);
+}
+
+void NewstoryListData::EventPageUp()
+{
+	if (caret >= 10)
+		SetPos(caret - 10);
+	else
+		SetPos(0);
+}
+
+void NewstoryListData::EventPageDown()
+{
+	if (caret < totalCount - 10)
+		SetPos(caret + 10);
+	else
+		SetPos(totalCount - 1);
+}
+
+/////////////////////////////////////////////////////////////////////////////////////////
+// Common navigation functions
+
 void NewstoryListData::ScrollBottom()
 {
 	if (!totalCount)
@@ -1008,25 +1042,25 @@ LRESULT CALLBACK NewstoryListWndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM
 
 			switch (wParam) {
 			case VK_UP:
-				data->LineUp();
+				data->EventUp();
 				break;
 
 			case VK_DOWN:
-				data->LineDown();
+				data->EventDown();
 				break;
 
 			case VK_PRIOR:
 				if (isCtrl)
 					data->ScrollTop();
 				else
-					data->PageUp();
+					data->EventPageUp();
 				break;
 
 			case VK_NEXT:
 				if (isCtrl)
 					data->ScrollBottom();
 				else
-					data->PageDown();
+					data->EventPageDown();
 				break;
 
 			case VK_HOME:
diff --git a/plugins/NewStory/src/history_control.h b/plugins/NewStory/src/history_control.h
index b773c43c6b..7e0328532d 100644
--- a/plugins/NewStory/src/history_control.h
+++ b/plugins/NewStory/src/history_control.h
@@ -68,6 +68,10 @@ struct NewstoryListData : public MZeroedObject
 	void      Download(int iOptions);
 	void      EndEditItem(bool bAccept);
 	void      EnsureVisible(int item);
+	void      EventUp();
+	void      EventDown();
+	void      EventPageUp();
+	void      EventPageDown();
 	int       FindNext(const wchar_t *pwszText);
 	int       FindPrev(const wchar_t *pwszText);
 	void      FixScrollPosition(bool bForce = false);