From: Simon Tatham <anakin@pobox.com>
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-Tag: 0.63~114
X-Git-Url: https://asedeno.scripts.mit.edu/gitweb/?a=commitdiff_plain;h=c3df7b9b1562ab804453bf3f3e3d3db93699c26c;p=PuTTY.git

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.

[originally from svn r9720]
---

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;