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gecko-dev/widget/windows/WinUtils.cpp

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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim:set ts=2 sts=2 sw=2 et cin: */
/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is mozilla.org code.
*
* The Initial Developer of the Original Code is
* Mozilla Foundation.
* Portions created by the Initial Developer are Copyright (C) 2011
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
* Masayuki Nakano <masayuki@d-toybox.com>
*
* Original nsWindow.cpp Contributor(s):
* Dean Tessman <dean_tessman@hotmail.com>
* Ere Maijala <emaijala@kolumbus.fi>
* Mark Hammond <markh@activestate.com>
* Michael Lowe <michael.lowe@bigfoot.com>
* Peter Bajusz <hyp-x@inf.bme.hu>
* Pierre Phaneuf <pp@ludusdesign.com>
* Robert O'Callahan <roc+moz@cs.cmu.edu>
* Roy Yokoyama <yokoyama@netscape.com>
* Makoto Kato <m_kato@ga2.so-net.ne.jp>
* Masayuki Nakano <masayuki@d-toybox.com>
* Dainis Jonitis <Dainis_Jonitis@swh-t.lv>
* Christian Biesinger <cbiesinger@web.de>
* Mats Palmgren <matspal@gmail.com>
* Ningjie Chen <chenn@email.uc.edu>
* Jim Mathies <jmathies@mozilla.com>
* Kyle Huey <me@kylehuey.com>
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#include "WinUtils.h"
#include "nsWindow.h"
#include "nsWindowDefs.h"
#include "nsGUIEvent.h"
#include "nsIDOMMouseEvent.h"
#include "mozilla/Preferences.h"
#ifdef DEBUG
#ifndef max
#define max(a,b) (((a) > (b)) ? (a) : (b))
#endif
#ifndef min
#define min(a,b) (((a) < (b)) ? (a) : (b))
#endif
#include <gdiplus.h>
#endif
namespace mozilla {
namespace widget {
// SHCreateItemFromParsingName is only available on vista and up.
WinUtils::SHCreateItemFromParsingNamePtr WinUtils::sCreateItemFromParsingName = nsnull;
/* static */
WinUtils::WinVersion
WinUtils::GetWindowsVersion()
{
static PRInt32 version = 0;
if (version) {
return static_cast<WinVersion>(version);
}
OSVERSIONINFOEX osInfo;
osInfo.dwOSVersionInfoSize = sizeof(OSVERSIONINFOEX);
// This cast is safe and supposed to be here, don't worry
::GetVersionEx((OSVERSIONINFO*)&osInfo);
version =
(osInfo.dwMajorVersion & 0xff) << 8 | (osInfo.dwMinorVersion & 0xff);
return static_cast<WinVersion>(version);
}
/* static */
bool
WinUtils::GetRegistryKey(HKEY aRoot,
const PRUnichar* aKeyName,
const PRUnichar* aValueName,
PRUnichar* aBuffer,
DWORD aBufferLength)
{
NS_PRECONDITION(aKeyName, "The key name is NULL");
HKEY key;
LONG result =
::RegOpenKeyExW(aRoot, aKeyName, NULL, KEY_READ | KEY_WOW64_32KEY, &key);
if (result != ERROR_SUCCESS) {
result =
::RegOpenKeyExW(aRoot, aKeyName, NULL, KEY_READ | KEY_WOW64_64KEY, &key);
if (result != ERROR_SUCCESS) {
return false;
}
}
DWORD type;
result =
::RegQueryValueExW(key, aValueName, NULL, &type, (BYTE*) aBuffer,
&aBufferLength);
::RegCloseKey(key);
if (result != ERROR_SUCCESS || type != REG_SZ) {
return false;
}
if (aBuffer) {
aBuffer[aBufferLength / sizeof(*aBuffer) - 1] = 0;
}
return true;
}
/* static */
bool
WinUtils::HasRegistryKey(HKEY aRoot, const PRUnichar* aKeyName)
{
MOZ_ASSERT(aRoot, "aRoot must not be NULL");
MOZ_ASSERT(aKeyName, "aKeyName must not be NULL");
HKEY key;
LONG result =
::RegOpenKeyExW(aRoot, aKeyName, 0, KEY_READ | KEY_WOW64_32KEY, &key);
if (result != ERROR_SUCCESS) {
result =
::RegOpenKeyExW(aRoot, aKeyName, 0, KEY_READ | KEY_WOW64_64KEY, &key);
if (result != ERROR_SUCCESS) {
return false;
}
}
::RegCloseKey(key);
return true;
}
/* static */
HWND
WinUtils::GetTopLevelHWND(HWND aWnd,
bool aStopIfNotChild,
bool aStopIfNotPopup)
{
HWND curWnd = aWnd;
HWND topWnd = NULL;
while (curWnd) {
topWnd = curWnd;
if (aStopIfNotChild) {
DWORD_PTR style = ::GetWindowLongPtrW(curWnd, GWL_STYLE);
VERIFY_WINDOW_STYLE(style);
if (!(style & WS_CHILD)) // first top-level window
break;
}
HWND upWnd = ::GetParent(curWnd); // Parent or owner (if has no parent)
// GetParent will only return the owner if the passed in window
// has the WS_POPUP style.
if (!upWnd && !aStopIfNotPopup) {
upWnd = ::GetWindow(curWnd, GW_OWNER);
}
curWnd = upWnd;
}
return topWnd;
}
static PRUnichar*
GetNSWindowPropName()
{
static PRUnichar sPropName[40] = L"";
if (!*sPropName) {
_snwprintf(sPropName, 39, L"MozillansIWidgetPtr%p",
::GetCurrentProcessId());
sPropName[39] = '\0';
}
return sPropName;
}
/* static */
bool
WinUtils::SetNSWindowPtr(HWND aWnd, nsWindow* aWindow)
{
if (!aWindow) {
::RemovePropW(aWnd, GetNSWindowPropName());
return true;
}
return ::SetPropW(aWnd, GetNSWindowPropName(), (HANDLE)aWindow);
}
/* static */
nsWindow*
WinUtils::GetNSWindowPtr(HWND aWnd)
{
return static_cast<nsWindow*>(::GetPropW(aWnd, GetNSWindowPropName()));
}
static BOOL CALLBACK
AddMonitor(HMONITOR, HDC, LPRECT, LPARAM aParam)
{
(*(PRInt32*)aParam)++;
return TRUE;
}
/* static */
PRInt32
WinUtils::GetMonitorCount()
{
PRInt32 monitorCount = 0;
EnumDisplayMonitors(NULL, NULL, AddMonitor, (LPARAM)&monitorCount);
return monitorCount;
}
/* static */
bool
WinUtils::IsOurProcessWindow(HWND aWnd)
{
if (!aWnd) {
return false;
}
DWORD processId = 0;
::GetWindowThreadProcessId(aWnd, &processId);
return (processId == ::GetCurrentProcessId());
}
/* static */
HWND
WinUtils::FindOurProcessWindow(HWND aWnd)
{
for (HWND wnd = ::GetParent(aWnd); wnd; wnd = ::GetParent(wnd)) {
if (IsOurProcessWindow(wnd)) {
return wnd;
}
}
return NULL;
}
static bool
IsPointInWindow(HWND aWnd, const POINT& aPointInScreen)
{
RECT bounds;
if (!::GetWindowRect(aWnd, &bounds)) {
return false;
}
return (aPointInScreen.x >= bounds.left && aPointInScreen.x < bounds.right &&
aPointInScreen.y >= bounds.top && aPointInScreen.y < bounds.bottom);
}
/**
* FindTopmostWindowAtPoint() returns the topmost child window (topmost means
* forground in this context) of aWnd.
*/
static HWND
FindTopmostWindowAtPoint(HWND aWnd, const POINT& aPointInScreen)
{
if (!::IsWindowVisible(aWnd) || !IsPointInWindow(aWnd, aPointInScreen)) {
return NULL;
}
HWND childWnd = ::GetTopWindow(aWnd);
while (childWnd) {
HWND topmostWnd = FindTopmostWindowAtPoint(childWnd, aPointInScreen);
if (topmostWnd) {
return topmostWnd;
}
childWnd = ::GetNextWindow(childWnd, GW_HWNDNEXT);
}
return aWnd;
}
struct FindOurWindowAtPointInfo
{
POINT mInPointInScreen;
HWND mOutWnd;
};
static BOOL CALLBACK
FindOurWindowAtPointCallback(HWND aWnd, LPARAM aLPARAM)
{
if (!WinUtils::IsOurProcessWindow(aWnd)) {
// This isn't one of our top-level windows; continue enumerating.
return TRUE;
}
// Get the top-most child window under the point. If there's no child
// window, and the point is within the top-level window, then the top-level
// window will be returned. (This is the usual case. A child window
// would be returned for plugins.)
FindOurWindowAtPointInfo* info =
reinterpret_cast<FindOurWindowAtPointInfo*>(aLPARAM);
HWND childWnd = FindTopmostWindowAtPoint(aWnd, info->mInPointInScreen);
if (!childWnd) {
// This window doesn't contain the point; continue enumerating.
return TRUE;
}
// Return the HWND and stop enumerating.
info->mOutWnd = childWnd;
return FALSE;
}
/* static */
HWND
WinUtils::FindOurWindowAtPoint(const POINT& aPointInScreen)
{
FindOurWindowAtPointInfo info;
info.mInPointInScreen = aPointInScreen;
info.mOutWnd = NULL;
// This will enumerate all top-level windows in order from top to bottom.
EnumWindows(FindOurWindowAtPointCallback, reinterpret_cast<LPARAM>(&info));
return info.mOutWnd;
}
/* static */
UINT
WinUtils::GetInternalMessage(UINT aNativeMessage)
{
switch (aNativeMessage) {
case WM_MOUSEWHEEL:
return MOZ_WM_MOUSEVWHEEL;
case WM_MOUSEHWHEEL:
return MOZ_WM_MOUSEHWHEEL;
case WM_VSCROLL:
return MOZ_WM_VSCROLL;
case WM_HSCROLL:
return MOZ_WM_HSCROLL;
default:
return aNativeMessage;
}
}
/* static */
UINT
WinUtils::GetNativeMessage(UINT aInternalMessage)
{
switch (aInternalMessage) {
case MOZ_WM_MOUSEVWHEEL:
return WM_MOUSEWHEEL;
case MOZ_WM_MOUSEHWHEEL:
return WM_MOUSEHWHEEL;
case MOZ_WM_VSCROLL:
return WM_VSCROLL;
case MOZ_WM_HSCROLL:
return WM_HSCROLL;
default:
return aInternalMessage;
}
}
/* static */
PRUint16
WinUtils::GetMouseInputSource()
{
PRInt32 inputSource = nsIDOMMouseEvent::MOZ_SOURCE_MOUSE;
LPARAM lParamExtraInfo = ::GetMessageExtraInfo();
if ((lParamExtraInfo & TABLET_INK_SIGNATURE) == TABLET_INK_CHECK) {
inputSource = (lParamExtraInfo & TABLET_INK_TOUCH) ?
nsIDOMMouseEvent::MOZ_SOURCE_TOUCH : nsIDOMMouseEvent::MOZ_SOURCE_PEN;
}
return static_cast<PRUint16>(inputSource);
}
/* static */
MSG
WinUtils::InitMSG(UINT aMessage, WPARAM wParam, LPARAM lParam)
{
MSG msg;
msg.message = aMessage;
msg.wParam = wParam;
msg.lParam = lParam;
return msg;
}
/* static */
bool
WinUtils::VistaCreateItemFromParsingNameInit()
{
// Load and store Vista+ SHCreateItemFromParsingName
if (sCreateItemFromParsingName) {
return true;
}
static HMODULE sShellDll = nsnull;
if (sShellDll) {
return false;
}
static const PRUnichar kSehllLibraryName[] = L"shell32.dll";
sShellDll = ::LoadLibraryW(kSehllLibraryName);
if (!sShellDll) {
return false;
}
sCreateItemFromParsingName = (SHCreateItemFromParsingNamePtr)
GetProcAddress(sShellDll, "SHCreateItemFromParsingName");
return sCreateItemFromParsingName != nsnull;
}
/* static */
HRESULT
WinUtils::SHCreateItemFromParsingName(PCWSTR pszPath, IBindCtx *pbc,
REFIID riid, void **ppv)
{
if (!VistaCreateItemFromParsingNameInit())
return E_FAIL;
return sCreateItemFromParsingName(pszPath, pbc, riid, ppv);
}
/* static */
bool
WinUtils::GetShellItemPath(IShellItem* aItem,
nsString& aResultString)
{
NS_ENSURE_TRUE(aItem, false);
LPWSTR str = NULL;
if (FAILED(aItem->GetDisplayName(SIGDN_FILESYSPATH, &str)))
return false;
aResultString.Assign(str);
CoTaskMemFree(str);
return !aResultString.IsEmpty();
}
#ifdef DEBUG
// Win xp and up
#pragma comment(lib, "gdiplus.lib")
static bool
GetEncoderClsid(const WCHAR* aFormat, CLSID* aClsid)
{
using namespace Gdiplus;
UINT num = 0;
UINT size = 0;
ImageCodecInfo* pImageCodecInfo = NULL;
GetImageEncodersSize(&num, &size);
if(size == 0)
return false;
pImageCodecInfo = (ImageCodecInfo*)(moz_malloc(size));
if (GetImageEncoders(num, size, pImageCodecInfo) != Ok)
return false;
for(UINT j = 0; j < num; ++j) {
if(!wcscmp(pImageCodecInfo[j].MimeType, aFormat)) {
*aClsid = pImageCodecInfo[j].Clsid;
moz_free(pImageCodecInfo);
return true;
}
}
moz_free(pImageCodecInfo);
return false;
}
/* static */
void
WinUtils::SaveDCToPng(HDC aHdc, const WCHAR* aFilePath, int aXPos, int aYPos,
int aWidth, int aHeight)
{
using namespace Gdiplus;
static ULONG_PTR sGiplusToken;
nsCOMPtr<nsILocalFile> file(do_CreateInstance("@mozilla.org/file/local;1"));
if (!file || NS_FAILED(file->InitWithPath(nsDependentString(aFilePath)))) {
NS_WARNING("bad file path.");
return;
}
GdiplusStartupInput gdiplusStartupInput;
if (!sGiplusToken)
GdiplusStartup(&sGiplusToken, &gdiplusStartupInput, NULL);
HDC memdc;
HBITMAP membit;
memdc = CreateCompatibleDC(aHdc);
NS_WARN_IF_FALSE(memdc, "CreateCompatibleDC failed");
if (!memdc)
return;
membit = CreateCompatibleBitmap(aHdc, aWidth, aHeight);
NS_WARN_IF_FALSE(membit, "CreateCompatibleBitmap failed");
if (!membit) {
DeleteObject(memdc);
return;
}
HBITMAP hOldBitmap =(HBITMAP) SelectObject(memdc, membit);
if (!hOldBitmap || hOldBitmap == HGDI_ERROR) {
DeleteObject(memdc);
DeleteObject(membit);
return;
}
BitBlt(memdc, 0, 0, aWidth, aHeight, aHdc, aXPos, aYPos, SRCCOPY);
Gdiplus::Bitmap bitmap(membit, NULL);
CLSID clsid;
if (!GetEncoderClsid(L"image/png", &clsid)) {
NS_WARNING("GetEncoderClsid failed");
return;
}
file->Remove(false);
if (bitmap.Save(aFilePath, &clsid) != Ok) {
NS_WARNING("bitmap.Save faled.");
}
SelectObject(memdc, hOldBitmap);
DeleteObject(memdc);
DeleteObject(membit);
}
/* static */
void
WinUtils::SaveDCToPngIndexed(HDC aHdc, const WCHAR* aDirectory, const WCHAR* aAnnotation,
int aXPos, int aYPos, int aWidth, int aHeight)
{
static int sPngFileIndex;
WCHAR filename[512];
filename[0] = 0;
wsprintf(filename, L"%s\\%s_image-%d.png", aDirectory, aAnnotation,
sPngFileIndex);
sPngFileIndex++;
WinUtils::SaveDCToPng(aHdc, filename, aXPos, aYPos, aWidth, aHeight);
}
#endif // DEBUG
} // namespace widget
} // namespace mozilla
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