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| 1 // Copyright (c) 2010 The Chromium Authors. All rights reserved. | |
| 2 // Use of this source code is governed by a BSD-style license that can be | |
| 3 // found in the LICENSE file. | |
| 4 | |
| 5 #include "chrome_frame/infobars/internal/displaced_window_manager.h" | |
| 6 | |
| 7 DisplacedWindowManager::DisplacedWindowManager() { | |
| 8 } | |
| 9 | |
| 10 void DisplacedWindowManager::UpdateLayout() { | |
| 11 // Call SetWindowPos with SWP_FRAMECHANGED for displaced window. | |
| 12 // Displaced window will receive WM_NCCALCSIZE to recalculate its client size. | |
| 13 ::SetWindowPos(m_hWnd, | |
| 14 NULL, 0, 0, 0, 0, | |
| 15 SWP_NOACTIVATE | SWP_NOMOVE | SWP_NOSIZE | SWP_NOZORDER | | |
| 16 SWP_FRAMECHANGED); | |
| 17 } | |
| 18 | |
| 19 LRESULT DisplacedWindowManager::OnNcCalcSize(BOOL calc_valid_rects, | |
| 20 LPARAM lparam) { | |
| 21 // Ask the original window proc to calculate the 'natural' size of the window. | |
| 22 LRESULT ret = DefWindowProc(WM_NCCALCSIZE, | |
| 23 static_cast<WPARAM>(calc_valid_rects), lparam); | |
| 24 if (lparam == NULL) | |
| 25 return ret; | |
| 26 | |
| 27 // Whether calc_valid_rects is true or false, we could treat beginning of | |
| 28 // lparam as a RECT object. | |
| 29 RECT* rect = reinterpret_cast<RECT*>(lparam); | |
| 30 RECT natural_rect = *rect; | |
| 31 if (delegate() != NULL) | |
| 32 delegate()->AdjustDisplacedWindowDimensions(rect); | |
| 33 | |
| 34 // If we modified the window's dimensions, there is no way to respect a custom | |
| 35 // "client-area preservation strategy", so we must force a redraw to be safe. | |
| 36 if (calc_valid_rects && ret == WVR_VALIDRECTS && | |
| 37 !EqualRect(&natural_rect, rect)) { | |
| 38 ret = WVR_REDRAW; | |
| 39 } | |
| 40 | |
| 41 return ret; | |
| 42 } | |
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