Complete unicodification of the rebar common control.
[wine] / windows / scroll.c
CommitLineData
e399fc36
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1/*
2 * Scroll windows and DCs
3 *
4 * Copyright David W. Metcalfe, 1993
8cc3a5e4 5 * Alex Korobka 1995,1996
d471965c 6 *
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7 * This library is free software; you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public
9 * License as published by the Free Software Foundation; either
10 * version 2.1 of the License, or (at your option) any later version.
e399fc36 11 *
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12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library; if not, write to the Free Software
19 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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20 */
21
e37c6e18 22#include <stdarg.h>
e399fc36 23#include <stdlib.h>
b87fe2e9 24
d3e22d9d 25#include "windef.h"
e37c6e18 26#include "winbase.h"
d3e22d9d 27#include "wingdi.h"
1ed4ecff 28#include "wine/winuser16.h"
61afa33b 29#include "winuser.h"
6a78c16a 30#include "user_private.h"
9ffa91ef 31#include "win.h"
0799c1a7 32#include "wine/debug.h"
d471965c 33
0799c1a7 34WINE_DEFAULT_DEBUG_CHANNEL(scroll);
b4b9fae6 35
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36/*************************************************************************
37 * fix_caret
38 */
39static HWND fix_caret(HWND hWnd, LPRECT lprc, UINT flags)
40{
11e35239 41 GUITHREADINFO info;
9ffa91ef 42
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43 if (!GetGUIThreadInfo( GetCurrentThreadId(), &info )) return 0;
44 if (!info.hwndCaret) return 0;
45 if (info.hwndCaret == hWnd ||
46 ((flags & SW_SCROLLCHILDREN) && IsChild(hWnd, info.hwndCaret)))
47 {
48 POINT pt;
49 pt.x = info.rcCaret.left;
50 pt.y = info.rcCaret.top;
51 MapWindowPoints( info.hwndCaret, hWnd, (LPPOINT)&info.rcCaret, 2 );
52 if( IntersectRect(lprc, lprc, &info.rcCaret) )
53 {
54 HideCaret(0);
55 lprc->left = pt.x;
56 lprc->top = pt.y;
57 return info.hwndCaret;
58 }
59 }
60 return 0;
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61}
62
06a60621 63/*************************************************************************
e8698e9e 64 * ScrollWindowEx (USER32.@)
06a60621
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65 *
66 * Note: contrary to what the doc says, pixels that are scrolled from the
67 * outside of clipRect to the inside are NOT painted.
68 *
06a60621 69 */
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70INT WINAPI ScrollWindowEx( HWND hwnd, INT dx, INT dy,
71 const RECT *rect, const RECT *clipRect,
72 HRGN hrgnUpdate, LPRECT rcUpdate,
73 UINT flags )
06a60621 74{
e8698e9e 75 INT retVal = NULLREGION;
06a60621
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76 BOOL bOwnRgn = TRUE;
77 BOOL bUpdate = (rcUpdate || hrgnUpdate || flags & (SW_INVALIDATE | SW_ERASE));
312f09b8 78 int rdw_flags;
06a60621
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79 HRGN hrgnTemp;
80 HDC hDC;
81 RECT rc, cliprc;
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82 RECT caretrc;
83 HWND hwndCaret = NULL;
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84
85 TRACE( "%p, %d,%d hrgnUpdate=%p rcUpdate = %p %s %04x\n",
86 hwnd, dx, dy, hrgnUpdate, rcUpdate, wine_dbgstr_rect(rect), flags );
87 TRACE( "clipRect = %s\n", wine_dbgstr_rect(clipRect));
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88 if( flags & ~( SW_SCROLLCHILDREN | SW_INVALIDATE | SW_ERASE))
89 FIXME("some flags (%04x) are unhandled\n", flags);
90
91 rdw_flags = (flags & SW_ERASE) && (flags & SW_INVALIDATE) ?
92 RDW_INVALIDATE | RDW_ERASE : RDW_INVALIDATE ;
06a60621 93
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94 if (!WIN_IsWindowDrawable( hwnd, TRUE )) return ERROR;
95 hwnd = WIN_GetFullHandle( hwnd );
96
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97 GetClientRect(hwnd, &rc);
98 if (rect) IntersectRect(&rc, &rc, rect);
99
100 if (clipRect) IntersectRect(&cliprc,&rc,clipRect);
101 else cliprc = rc;
102
103 if( hrgnUpdate ) bOwnRgn = FALSE;
104 else if( bUpdate ) hrgnUpdate = CreateRectRgn( 0, 0, 0, 0 );
105
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106 if( !IsRectEmpty(&cliprc) && (dx || dy)) {
107 caretrc = rc;
108 hwndCaret = fix_caret(hwnd, &caretrc, flags);
06a60621 109
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110 hDC = GetDCEx( hwnd, 0, DCX_CACHE | DCX_USESTYLE );
111 if (hDC)
112 {
113 ScrollDC( hDC, dx, dy, &rc, &cliprc, hrgnUpdate, rcUpdate );
06a60621 114
e8698e9e 115 ReleaseDC( hwnd, hDC );
06a60621 116
e8698e9e 117 if (!bUpdate)
312f09b8 118 RedrawWindow( hwnd, NULL, hrgnUpdate, rdw_flags);
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119 }
120
121 /* Take into account the fact that some damage may have occurred during
122 * the scroll */
123 hrgnTemp = CreateRectRgn( 0, 0, 0, 0 );
124 retVal = GetUpdateRgn( hwnd, hrgnTemp, FALSE );
125 if (retVal != NULLREGION)
126 {
127 HRGN hrgnClip = CreateRectRgnIndirect(&cliprc);
128 OffsetRgn( hrgnTemp, dx, dy );
129 CombineRgn( hrgnTemp, hrgnTemp, hrgnClip, RGN_AND );
312f09b8 130 RedrawWindow( hwnd, NULL, hrgnTemp, rdw_flags);
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131 DeleteObject( hrgnClip );
132 }
133 DeleteObject( hrgnTemp );
134 } else {
135 /* nothing was scrolled */
136 if( !bOwnRgn)
137 SetRectRgn( hrgnUpdate, 0, 0, 0, 0 );
138 SetRectEmpty( rcUpdate);
06a60621 139 }
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140
141 if( flags & SW_SCROLLCHILDREN )
142 {
143 HWND *list = WIN_ListChildren( hwnd );
144 if (list)
145 {
146 int i;
147 RECT r, dummy;
148 for (i = 0; list[i]; i++)
149 {
150 GetWindowRect( list[i], &r );
151 MapWindowPoints( 0, hwnd, (POINT *)&r, 2 );
e8698e9e 152 if (!rect || IntersectRect(&dummy, &r, rect))
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153 SetWindowPos( list[i], 0, r.left + dx, r.top + dy, 0, 0,
154 SWP_NOZORDER | SWP_NOSIZE | SWP_NOACTIVATE |
155 SWP_NOREDRAW | SWP_DEFERERASE );
156 }
157 HeapFree( GetProcessHeap(), 0, list );
158 }
159 }
160
161 if( flags & (SW_INVALIDATE | SW_ERASE) )
312f09b8 162 RedrawWindow( hwnd, NULL, hrgnUpdate, rdw_flags |
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163 ((flags & SW_SCROLLCHILDREN) ? RDW_ALLCHILDREN : 0 ) );
164
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165 if( hwndCaret ) {
166 SetCaretPos( caretrc.left + dx, caretrc.top + dy );
167 ShowCaret(hwndCaret);
168 }
169
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170 if( bOwnRgn && hrgnUpdate ) DeleteObject( hrgnUpdate );
171
172 return retVal;
173}
9ffa91ef 174
75d86e1f 175/*************************************************************************
2ece70e7 176 * ScrollWindow (USER32.@)
670cdc45 177 *
75d86e1f 178 */
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179BOOL WINAPI ScrollWindow( HWND hwnd, INT dx, INT dy,
180 const RECT *rect, const RECT *clipRect )
e399fc36 181{
1da6dbab 182 return
a3960292 183 (ERROR != ScrollWindowEx( hwnd, dx, dy, rect, clipRect, 0, NULL,
1da6dbab
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184 (rect ? 0 : SW_SCROLLCHILDREN) |
185 SW_INVALIDATE ));
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186}
187
75d86e1f 188/*************************************************************************
2ece70e7 189 * ScrollDC (USER32.@)
9a624916 190 *
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191 * dx, dy, lprcScroll and lprcClip are all in logical coordinates (msdn is wrong)
192 * hrgnUpdate is returned in device coordinates with rcUpdate in logical coordinates.
75d86e1f 193 */
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194BOOL WINAPI ScrollDC( HDC hdc, INT dx, INT dy, const RECT *lprcScroll,
195 const RECT *lprcClip, HRGN hrgnUpdate, LPRECT lprcUpdate )
196
e399fc36 197{
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198 RECT rSrc, rClipped_src, rClip, rDst, offset;
199
200 TRACE( "%p %d,%d hrgnUpdate=%p lprcUpdate = %p\n", hdc, dx, dy, hrgnUpdate, lprcUpdate );
201 if (lprcClip) TRACE( "lprcClip = %s\n", wine_dbgstr_rect(lprcClip));
202 if (lprcScroll) TRACE( "lprcScroll = %s\n", wine_dbgstr_rect(lprcScroll));
203
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204 if (USER_Driver.pScrollDC)
205 return USER_Driver.pScrollDC( hdc, dx, dy, lprcScroll, lprcClip, hrgnUpdate, lprcUpdate );
a51bb815 206
06a60621 207 /* compute device clipping region (in device coordinates) */
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208 if (lprcScroll) rSrc = *lprcScroll;
209 else GetClipBox( hdc, &rSrc );
210 LPtoDP(hdc, (LPPOINT)&rSrc, 2);
211
212 if (lprcClip) rClip = *lprcClip;
213 else GetClipBox( hdc, &rClip );
214 LPtoDP(hdc, (LPPOINT)&rClip, 2);
215
216 IntersectRect( &rClipped_src, &rSrc, &rClip );
217 TRACE("rSrc %s rClip %s clipped rSrc %s\n", wine_dbgstr_rect(&rSrc),
218 wine_dbgstr_rect(&rClip), wine_dbgstr_rect(&rClipped_src));
219
220 rDst = rClipped_src;
221 SetRect(&offset, 0, 0, dx, dy);
222 LPtoDP(hdc, (LPPOINT)&offset, 2);
223 OffsetRect( &rDst, offset.right - offset.left, offset.bottom - offset.top );
224 TRACE("rDst before clipping %s\n", wine_dbgstr_rect(&rDst));
225 IntersectRect( &rDst, &rDst, &rClip );
226 TRACE("rDst after clipping %s\n", wine_dbgstr_rect(&rDst));
227
228 if (!IsRectEmpty(&rDst))
229 {
230 /* copy bits */
231 RECT rDst_lp = rDst, rSrc_lp = rDst;
232
233 OffsetRect( &rSrc_lp, offset.left - offset.right, offset.top - offset.bottom );
234 DPtoLP(hdc, (LPPOINT)&rDst_lp, 2);
235 DPtoLP(hdc, (LPPOINT)&rSrc_lp, 2);
236
237 if (!BitBlt( hdc, rDst_lp.left, rDst_lp.top,
238 rDst_lp.right - rDst_lp.left, rDst_lp.bottom - rDst_lp.top,
239 hdc, rSrc_lp.left, rSrc_lp.top, SRCCOPY))
240 return FALSE;
241 }
242
243 /* compute update areas. This is the clipped source or'ed with the unclipped source translated minus the
244 clipped src translated (rDst) all clipped to rClip */
245
246 if (hrgnUpdate || lprcUpdate)
247 {
248 HRGN hrgn = hrgnUpdate, hrgn2;
249
250 if (hrgn) SetRectRgn( hrgn, rClipped_src.left, rClipped_src.top, rClipped_src.right, rClipped_src.bottom );
251 else hrgn = CreateRectRgn( rClipped_src.left, rClipped_src.top, rClipped_src.right, rClipped_src.bottom );
252
253 hrgn2 = CreateRectRgnIndirect( &rSrc );
254 OffsetRgn(hrgn2, offset.right - offset.left, offset.bottom - offset.top );
255 CombineRgn(hrgn, hrgn, hrgn2, RGN_OR);
256
257 SetRectRgn( hrgn2, rDst.left, rDst.top, rDst.right, rDst.bottom );
258 CombineRgn( hrgn, hrgn, hrgn2, RGN_DIFF );
259
260 SetRectRgn( hrgn2, rClip.left, rClip.top, rClip.right, rClip.bottom );
261 CombineRgn( hrgn, hrgn, hrgn2, RGN_AND );
262
263 if( lprcUpdate )
264 {
265 GetRgnBox( hrgn, lprcUpdate );
266
267 /* Put the lprcUpdate in logical coordinate */
268 DPtoLP( hdc, (LPPOINT)lprcUpdate, 2 );
269 TRACE("returning lprcUpdate %s\n", wine_dbgstr_rect(lprcUpdate));
270 }
271 if (!hrgnUpdate) DeleteObject( hrgn );
272 DeleteObject( hrgn2 );
273 }
274 return TRUE;
e399fc36 275}