From cbdfd31a3c4607501d3869af87695b524b51a911 Mon Sep 17 00:00:00 2001
From: michi_cc <michi_cc@openttd.org>
Date: Mon, 5 Aug 2013 20:37:18 +0000
Subject: (svn r25682) -Change: [Win32] Position the IME candidate window at
 the caret position.

---
 src/video/win32_v.cpp | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

(limited to 'src/video/win32_v.cpp')

diff --git a/src/video/win32_v.cpp b/src/video/win32_v.cpp
index f7394ba99..a6ca85c97 100644
--- a/src/video/win32_v.cpp
+++ b/src/video/win32_v.cpp
@@ -523,6 +523,40 @@ static void SetCompositionPos(HWND hwnd)
 	ImmReleaseContext(hwnd, hIMC);
 }
 
+/** Set the position of the candidate window. */
+static void SetCandidatePos(HWND hwnd)
+{
+	HIMC hIMC = ImmGetContext(hwnd);
+	if (hIMC != NULL) {
+		CANDIDATEFORM cf;
+		cf.dwIndex = 0;
+		cf.dwStyle = CFS_EXCLUDE;
+
+		if (EditBoxInGlobalFocus()) {
+			Point pt = _focused_window->GetCaretPosition();
+			cf.ptCurrentPos.x = _focused_window->left + pt.x;
+			cf.ptCurrentPos.y = _focused_window->top  + pt.y;
+			if (_focused_window->window_class == WC_CONSOLE) {
+				cf.rcArea.left   = _focused_window->left;
+				cf.rcArea.top    = _focused_window->top;
+				cf.rcArea.right  = _focused_window->left + _focused_window->width;
+				cf.rcArea.bottom = _focused_window->top  + _focused_window->height;
+			} else {
+				cf.rcArea.left   = _focused_window->left + _focused_window->nested_focus->pos_x;
+				cf.rcArea.top    = _focused_window->top  + _focused_window->nested_focus->pos_y;
+				cf.rcArea.right  = cf.rcArea.left + _focused_window->nested_focus->current_x;
+				cf.rcArea.bottom = cf.rcArea.top  + _focused_window->nested_focus->current_y;
+			}
+		} else {
+			cf.ptCurrentPos.x = 0;
+			cf.ptCurrentPos.y = 0;
+			SetRectEmpty(&cf.rcArea);
+		}
+		ImmSetCandidateWindow(hIMC, &cf);
+	}
+	ImmReleaseContext(hwnd, hIMC);
+}
+
 /** Handle WM_IME_COMPOSITION messages. */
 static LRESULT HandleIMEComposition(HWND hwnd, WPARAM wParam, LPARAM lParam)
 {
@@ -560,6 +594,7 @@ static void CancelIMEComposition(HWND hwnd)
 #else
 
 static void SetCompositionPos(HWND hwnd) {}
+static void SetCandidatePos(HWND hwnd) {}
 static void CancelIMEComposition(HWND hwnd) {}
 
 #endif /* !defined(WINCE) || _WIN32_WCE >= 0x400 */
@@ -707,6 +742,10 @@ static LRESULT CALLBACK WndProcGdi(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lP
 		case WM_IME_COMPOSITION:
 			return HandleIMEComposition(hwnd, wParam, lParam);
 
+		case WM_IME_NOTIFY:
+			if (wParam == IMN_OPENCANDIDATE) SetCandidatePos(hwnd);
+			break;
+
 #if !defined(UNICODE)
 		case WM_IME_CHAR:
 			if (GB(wParam, 8, 8) != 0) {
@@ -1252,4 +1291,5 @@ void VideoDriver_Win32::EditBoxLostFocus()
 {
 	CancelIMEComposition(_wnd.main_wnd);
 	SetCompositionPos(_wnd.main_wnd);
+	SetCandidatePos(_wnd.main_wnd);
 }
-- 
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