From: simon <simon@cda61777-01e9-0310-a592-d414129be87e>
Date: Tue, 4 Dec 2012 20:53:19 +0000 (+0000)
Subject: Patch from Hideki Eiraku to make PuTTY call GetScrollInfo, so it can
X-Git-Url: https://git.distorted.org.uk/~mdw/sgt/putty/commitdiff_plain/e9ad953c8fcd27466d3a10ae344fb2122cc6b97b

Patch from Hideki Eiraku to make PuTTY call GetScrollInfo, so it can
use 32-bit scrollbar position data instead of being limited to the
16-bit version that comes in scrollbar messages' wParam.


git-svn-id: svn://svn.tartarus.org/sgt/putty@9720 cda61777-01e9-0310-a592-d414129be87e
---

diff --git a/windows/window.c b/windows/window.c
index 5eb1d047..b7f5f867 100644
--- a/windows/window.c
+++ b/windows/window.c
@@ -2994,7 +2994,19 @@ static LRESULT CALLBACK WndProc(HWND hwnd, UINT message,
 	    break;
 	  case SB_THUMBPOSITION:
 	  case SB_THUMBTRACK:
-	    term_scroll(term, 1, HIWORD(wParam));
+	    /*
+	     * Use GetScrollInfo instead of HIWORD(wParam) to get
+	     * 32-bit scroll position.
+	     */
+	    {
+		SCROLLINFO si;
+
+		si.cbSize = sizeof(si);
+		si.fMask = SIF_TRACKPOS;
+		if (GetScrollInfo(hwnd, SB_VERT, &si) == 0)
+		    si.nTrackPos = HIWORD(wParam);
+		term_scroll(term, 1, si.nTrackPos);
+	    }
 	    break;
 	}
 	break;