windows-nt/Source/XPSP1/NT/shell/shell32/combview.cpp
2020-09-26 16:20:57 +08:00

667 lines
20 KiB
C++

#include "shellprv.h"
#include <regstr.h>
#include <shellp.h>
#include "ole2dup.h"
#include "ids.h"
#include "defview.h"
#include "lvutil.h"
#include "idlcomm.h"
#include "filetbl.h"
#include "undo.h"
#include "vdate.h"
#include "cnctnpt.h"
#include "mshtml.h"
#include <sfview.h>
#include "defviewp.h"
#include "shellp.h"
#define LISTVIEW_PROP TEXT("CombView_listview_subclass")
#define ISMOUSEDOWN(msg) ((msg) == WM_LBUTTONDOWN || (msg) == WM_RBUTTONDOWN || (msg) == WM_MBUTTONDOWN)
#define HWNDLISTVIEW (g_pdsvlvp->pdsv->_hwndListview)
#define COMBVIEW_SUBCLASS_ID 42
typedef struct
{
CDefView *pdsv;
BOOL fInPaint;
HHOOK hHookMouse;
HHOOK hHookGetMsg;
} DVLVPROP;
//
// We need this global (g_pdsvlvp) for the mouse hook we need to implement the combined
// view. Since we only have one combined view at this point it is sufficient to have
// a single global, but if we end up with more than one combined view then
// there needs to be some additional code added so the hook(s) can figure out
// which combined view(s) it is associated with.
//
DVLVPROP * g_pdsvlvp = NULL;
const LPCTSTR c_rgElements[] = {
TEXT("A"),
TEXT("ANCHOR"), // ???
TEXT("PLUGINS"), // ???
TEXT("APPLET"),
TEXT("EMBED"),
TEXT("FORM"),
TEXT("IFRAME"),
TEXT("BUTTON"),
TEXT("INPUT"),
TEXT("OBJECT")
};
BOOL CombView_EnableAnimations(BOOL fEnable);
// Returns the first sibling window of the passed in window
HWND GetSpecialSibling(HWND hwnd)
{
HWND hwndT = GetWindow(hwnd, GW_HWNDFIRST);
while (hwnd == hwndT)
hwndT = GetWindow(hwndT, GW_HWNDNEXT);
return hwndT;
}
LRESULT CALLBACK CombView_LV_SubclassProc(HWND hwnd, UINT uMsg, WPARAM wParam,
LPARAM lParam, UINT_PTR uIdSubclass, DWORD_PTR dwRefData)
{
DVLVPROP *pdsvlvp = (DVLVPROP *)dwRefData;
// 2000-07-11 vtan: First check g_pdsvlvp for NULL. If this is NULL then the dwRefData
// has already been released in EnableCombinedView. There is only one DVLVPROP stored
// in the entire process in g_pdsvlvp. This seems like a problem. lamadio should fix
// this properly in the future.
if ((g_pdsvlvp != NULL) &&
pdsvlvp &&
pdsvlvp->pdsv->_fCombinedView &&
!pdsvlvp->fInPaint &&
uMsg == WM_PAINT)
{
// This code works well for general painting, like minimizing a window or
// or surfacing the desktop. However, it doesn't help the drag full windows
// scenario very much.
HRGN hrgn, hrgn2;
RECT rc;
HWND hwndT = GetSpecialSibling(hwnd);
// Turn on animations!
CombView_EnableAnimations(TRUE);
if (hwndT && (hrgn = CreateRectRgn(0, 0, 0, 0)))
{
if (hrgn2 = CreateRectRgn(0, 0, 0, 0))
{
pdsvlvp->fInPaint = TRUE;
if (!GetClassLongPtr(hwndT, GCLP_HBRBACKGROUND))
SetClassLongPtr(hwndT, GCLP_HBRBACKGROUND, (LPARAM)GetStockObject(HOLLOW_BRUSH));
if (GetUpdateRect(hwndT, &rc, FALSE))
{
RECT rcLV = rc;
MapWindowPoints(hwndT, hwnd, (LPPOINT)&rcLV, 2);
SetRectRgn(hrgn2, rcLV.left, rcLV.top, rcLV.right, rcLV.bottom);
GetWindowRgn(hwnd, hrgn);
CombineRgn(hrgn2, hrgn, hrgn2, RGN_DIFF);
SetWindowRgn(hwnd, hrgn2, FALSE);
InvalidateRect(hwndT, &rc, FALSE);
UpdateWindow(hwndT);
SetWindowRgn(hwnd, hrgn, FALSE);
InvalidateRect(hwnd, &rcLV, FALSE);
}
else
{
DeleteObject(hrgn);
DeleteObject(hrgn2);
}
pdsvlvp->fInPaint = FALSE;
}
else
{
DeleteObject(hrgn);
}
}
}
return DefSubclassProc(hwnd, uMsg, wParam, lParam);
}
// We need to set capture while we are stealing the mouse so that the
// window manager won't send WM_SETCURSOR messages to the wrong window.
// This function will also, as a side effect, send the WM_SETCURSOR to the
// listview so that it will set the hand cursor when it needs to.
void StealMouse(DVLVPROP * pdvlvp, BOOL fSteal, UINT msg)
{
HWND hwndCapture = GetCapture();
if (fSteal && (hwndCapture == NULL || hwndCapture == HWNDLISTVIEW))
{
// We need to set capture so that the window manager will not
// try to send the w_setcursor message to the wrong window, and we
// send it here ourself to the listview.
SetCapture(HWNDLISTVIEW);
SendMessage(HWNDLISTVIEW, WM_SETCURSOR, (WPARAM)HWNDLISTVIEW,
MAKELPARAM(HTCLIENT, LOWORD(msg)));
}
else
{
// If the listview still has capture release it now
if (HWNDLISTVIEW == hwndCapture)
ReleaseCapture();
}
}
LRESULT CALLBACK CombView_GetMsgHook(int nCode, WPARAM wParam, LPARAM lParam)
{
#define LPMSG ((LPMSG)lParam)
HHOOK hHookNext = NULL;
if (g_pdsvlvp)
{
if (LPMSG->message >= WM_MOUSEFIRST && LPMSG->message <= WM_MOUSELAST)
{
POINT pt;
pt.x = GET_X_LPARAM(LPMSG->lParam);
pt.y = GET_Y_LPARAM(LPMSG->lParam);
MapWindowPoints(LPMSG->hwnd, HWNDLISTVIEW, &pt, 1);
int iHit = g_pdsvlvp->pdsv->_HitTest(&pt);
// Unhook our hook when all of the mouse buttons are up and we're not over
// an item in the listview
if (GetKeyState(VK_LBUTTON) >= 0 &&
GetKeyState(VK_RBUTTON) >= 0 &&
GetKeyState(VK_MBUTTON) >= 0 &&
iHit == -1)
{
UnhookWindowsHookEx(g_pdsvlvp->hHookGetMsg);
g_pdsvlvp->hHookGetMsg = NULL;
}
else
{
hHookNext = g_pdsvlvp->hHookGetMsg;
}
if (IsChildOrSelf(GetSpecialSibling(HWNDLISTVIEW), LPMSG->hwnd) == S_OK)
{
// If we have grabbed the mouse, give it to the listview
LPMSG->hwnd = HWNDLISTVIEW;
LPMSG->lParam = MAKELPARAM(LOWORD(pt.x), LOWORD(pt.y));
}
}
else
{
hHookNext = g_pdsvlvp->hHookGetMsg;
}
// If we've just unhooked, or the hover is coming through to the listview and
// no mouse button is down then clear our ownership of the mouse
#define MK_BUTTON (MK_LBUTTON | MK_RBUTTON | MK_MBUTTON)
if (!hHookNext ||
// We need to special case the WM_MOUSEHOVER here so that the listview
// is able to implement hover select. If we have capture set when the
// hover select message goes through then it will ignore the message, so
// clear the capture now.
(LPMSG->message == WM_MOUSEHOVER && LPMSG->hwnd == HWNDLISTVIEW && !(LPMSG->wParam & MK_BUTTON)))
StealMouse(g_pdsvlvp, FALSE, 0);
}
if (hHookNext)
CallNextHookEx(hHookNext, nCode, wParam, lParam);
return 0;
#undef LPMSG
}
BOOL DoesElementNeedMouse (LPTSTR psz)
{
for (int i = 0; i < ARRAYSIZE(c_rgElements); i++)
{
if (lstrcmpi(c_rgElements[i], psz) == 0)
return TRUE;
}
return FALSE;
}
BOOL ShouldStealMouseClick(POINT * ppt, DVLVPROP * pdsvlvp)
{
IHTMLDocument2 *pihtmldoc2;
IHTMLElement *pielem;
HRESULT hr = E_FAIL;
if (SUCCEEDED(pdsvlvp->pdsv->GetItemObject(SVGIO_BACKGROUND, IID_IHTMLDocument2, (void **)&pihtmldoc2)))
{
// Work around for Trident issue -
// elementFromPoint is returning success here even though pielem is
// still NULL.
if (SUCCEEDED(pihtmldoc2->elementFromPoint(ppt->x, ppt->y, &pielem)) && pielem)
{
IHTMLElement *pielemT;
do {
BSTR bstr = NULL;
TCHAR sz[MAX_PATH];
pielem->get_tagName(&bstr);
SHUnicodeToTChar(bstr, sz, ARRAYSIZE(sz));
SysFreeString(bstr);
if (DoesElementNeedMouse(sz))
{
hr = E_FAIL;
}
else
{
if (SUCCEEDED(hr = pielem->get_parentElement(&pielemT)))
{
pielem->Release();
pielem = pielemT;
}
else
{
hr = S_OK;
pielem->Release();
pielem = NULL;
}
}
} while (SUCCEEDED(hr) && pielem);
if (pielem)
pielem->Release();
}
pihtmldoc2->Release();
}
return SUCCEEDED(hr);
}
LRESULT CALLBACK CombView_MouseHook(int nCode, WPARAM wParam, LPARAM lParam)
{
#define PMHS ((MOUSEHOOKSTRUCT *)lParam)
if ((nCode == HC_ACTION) && g_pdsvlvp && (PMHS->hwnd != HWNDLISTVIEW) && IsWindowVisible(HWNDLISTVIEW))
{
// If it isn't over the listview and the button is going down or we're
// moving over an area that would hit a listview icon then
// we need to start hooking mouse events. Install the GetMessage hook
// so that we can do what we need to do.
HWND hwndParent = GetSpecialSibling(HWNDLISTVIEW);
POINT ptLV = PMHS->pt;
HWND hwndHittest = WindowFromPoint(PMHS->pt);
ScreenToClient(HWNDLISTVIEW, &ptLV);
int iHit = g_pdsvlvp->pdsv->_HitTest(&ptLV);
ScreenToClient(hwndParent, &(PMHS->pt));
BOOL fStealMouse = (ISMOUSEDOWN(wParam) && ShouldStealMouseClick(&(PMHS->pt), g_pdsvlvp)) ||
(!GetCapture() && (iHit != -1) && (!hwndHittest || (hwndHittest == HWNDLISTVIEW)));
if (!g_pdsvlvp->hHookGetMsg)
{
if (hwndHittest && (IsChildOrSelf(hwndParent, hwndHittest) == S_OK))
{
if (fStealMouse)
{
// Note: We have to steal the mouse at this point and use the
// GetMessage hook to redirect the mouse messages to our listview
// window. If we do something different like swallow the message here
// and then PostMessage faked up events to the listview then all
// of the hover select functionality will break because the system
// won't detect the mouse as being over the listview.
StealMouse(g_pdsvlvp, TRUE, (UINT) wParam);
g_pdsvlvp->hHookGetMsg = SetWindowsHookEx(WH_GETMESSAGE, CombView_GetMsgHook,
NULL, GetCurrentThreadId());
}
}
}
else
{
if (fStealMouse)
StealMouse(g_pdsvlvp, TRUE, (UINT) wParam);
else
SendMessage(HWNDLISTVIEW, WM_SETCURSOR, (WPARAM)HWNDLISTVIEW, MAKELPARAM(HTCLIENT, LOWORD((UINT) wParam)));
}
}
if (g_pdsvlvp)
return CallNextHookEx(g_pdsvlvp->hHookMouse, nCode, wParam, lParam);
else
return 0;
#undef PMHS
}
/*
* This is the main entry point where a defview can be turned into a combined
* view. The effect of a combined view is to layer an extended view under
* the listview icons (via a regional listview) of a normal defview.
*
* Warnings:
* 1) This is currently only used by the "Active Desktop", it is optimized
* to only support one instance. Multiple combined views are not currently supported.
* 2) Disabling the combined view doesn't completely unhook itself from the defview
*/
void EnableCombinedView(CDefView *pdsv, BOOL fEnable)
{
DVLVPROP * pdsvlvp = g_pdsvlvp;
if (pdsvlvp)
{
if (!fEnable)
{
// Unhook ourselves
UnhookWindowsHookEx(pdsvlvp->hHookMouse);
if (pdsvlvp->hHookGetMsg)
{
UnhookWindowsHookEx(pdsvlvp->hHookGetMsg);
StealMouse(pdsvlvp, FALSE, 0);
}
g_pdsvlvp = NULL;
RemoveWindowSubclass(pdsv->_hwndListview, CombView_LV_SubclassProc, COMBVIEW_SUBCLASS_ID);
LocalFree((HLOCAL)pdsvlvp);
}
}
else
{
if (fEnable)
{
pdsvlvp = (DVLVPROP *)LocalAlloc(LPTR, sizeof(DVLVPROP));
if (pdsvlvp)
{
// We are only expecting one combined view
ASSERT(g_pdsvlvp == NULL);
// Get ourself hooked in
pdsvlvp->pdsv = pdsv;
SetWindowSubclass(pdsv->_hwndListview, CombView_LV_SubclassProc, COMBVIEW_SUBCLASS_ID, (DWORD_PTR)pdsvlvp);
pdsvlvp->hHookMouse = SetWindowsHookEx(WH_MOUSE, CombView_MouseHook, NULL, GetCurrentThreadId());
g_pdsvlvp = pdsvlvp;
}
}
}
}
/*
* This function is used to optimize the combined view ("Active Desktop") by turning
* off any animated html elements or embeddings when it is completely obscured.
*
* Note that we always honor enabling animations if they aren't already enabled.
* To make the client code easier though we only disable animations if we know
* the desktop is obscured.
*
* Returns: The state of animation after the call
*/
BOOL CombView_EnableAnimations(BOOL fEnable)
{
static BOOL fEnabled = TRUE;
if ((fEnable != fEnabled) && g_pdsvlvp)
{
IOleCommandTarget* pct;
BOOL fChangeAnimationState = fEnable;
if (!fEnable)
{
HDC hdc;
RECT rc;
HWND hwnd;
if ((hwnd = GetSpecialSibling(HWNDLISTVIEW)) && (hdc = GetDC(hwnd)))
{
fChangeAnimationState = (GetClipBox(hdc, &rc) == NULLREGION);
ReleaseDC(hwnd, hdc);
}
}
if (fChangeAnimationState &&
SUCCEEDED(g_pdsvlvp->pdsv->_psb->QueryInterface(IID_PPV_ARG(IOleCommandTarget, &pct))))
{
VARIANT var = { 0 };
TraceMsg(DM_TRACE, "Active Desktop: Animation state is changing:%d", fEnable);
var.vt = VT_I4;
var.lVal = fEnable;
pct->Exec(NULL, OLECMDID_ENABLE_INTERACTION, OLECMDEXECOPT_DONTPROMPTUSER, &var, NULL);
pct->Release();
fEnabled = fEnable;
}
}
return fEnabled;
}
// IDocHostUIHandler
// This is implemented by the combined view so that we can support various
// Win95 desktop functionality in a compatible way in the extended view.
// Some examples include picking off context menu invocations, configuring the
// host to display the way we want it too, and modifying drag/drop behavior.
HRESULT CSFVSite::ShowContextMenu(DWORD dwID, POINT *ppt, IUnknown *pcmdtReserved, IDispatch *pdispReserved)
{
CSFVFrame* pFrame = IToClass(CSFVFrame, _cSite, this);
CDefView* pView = IToClass(CDefView, _cFrame, pFrame);
// For Web View's w/o DVOC, it might be nice to let Trident's menu through...
if ((dwID == CONTEXT_MENU_DEFAULT || dwID == CONTEXT_MENU_IMAGE) && pView->_hwndListview)
{
// we used to unselect everything first, but that's bogus because it breaks the app key trying
// to get a context menu on the currently selected items
// BOGUS - Trident blows up if we send the message here and the user
// turns off webview. Post it for now.
PostMessage(pView->_hwndListview, WM_CONTEXTMENU,
(WPARAM)pView->_hwndListview, MAKELPARAM((short)LOWORD(ppt->x), (short)LOWORD(ppt->y)));
return S_OK;
}
else
{
return S_FALSE;
}
}
// IDocHostUIHandler
HRESULT CSFVSite::GetHostInfo(DOCHOSTUIINFO *pInfo)
{
CSFVFrame* pFrame = IToClass(CSFVFrame, _cSite, this);
CDefView* pView = IToClass(CDefView, _cFrame, pFrame);
pInfo->cbSize = sizeof(*pInfo);
if (pView->_fCombinedView)
{
pInfo->dwFlags = DOCHOSTUIFLAG_DISABLE_HELP_MENU | // We don't want Trident's help
DOCHOSTUIFLAG_NO3DBORDER | // Desktop should be borderless
DOCHOSTUIFLAG_SCROLL_NO; // | // Desktop should never scroll
// DOCHOSTUIFLAG_DIALOG; // Prevent selection in Trident
}
else
{
pInfo->dwFlags = DOCHOSTUIFLAG_DISABLE_HELP_MENU |
DOCHOSTUIFLAG_DIALOG |
DOCHOSTUIFLAG_DISABLE_SCRIPT_INACTIVE;
}
if (SHIsLowMemoryMachine(ILMM_IE4))
pInfo->dwFlags = pInfo->dwFlags | DOCHOSTUIFLAG_DISABLE_OFFSCREEN;
pInfo->dwDoubleClick = DOCHOSTUIDBLCLK_DEFAULT; // default
return S_OK;
}
HRESULT CSFVSite::ShowUI(DWORD dwID, IOleInPlaceActiveObject *pActiveObject,
IOleCommandTarget *pCommandTarget, IOleInPlaceFrame *pFrame, IOleInPlaceUIWindow *pDoc)
{
// Host did not display its own UI. Trident will proceed to display its own.
return S_OK;
}
HRESULT CSFVSite::HideUI(void)
{
// This one is paired with ShowUI
return S_FALSE;
}
HRESULT CSFVSite::UpdateUI(void)
{
// LATER: Isn't this equivalent to OLECMDID_UPDATECOMMANDS?
return S_FALSE;
}
HRESULT CSFVSite::EnableModeless(BOOL fEnable)
{
// Called from the Trident when the equivalent member of its
// IOleInPlaceActiveObject is called by the frame. We don't care
// those cases.
return S_OK;
}
HRESULT CSFVSite::OnDocWindowActivate(BOOL fActivate)
{
// Called from the Trident when the equivalent member of its
// IOleInPlaceActiveObject is called by the frame. We don't care
// those cases.
return S_OK;
}
HRESULT CSFVSite::OnFrameWindowActivate(BOOL fActivate)
{
// Called from the Trident when the equivalent member of its
// IOleInPlaceActiveObject is called by the frame. We don't care
// those cases.
return S_OK;
}
HRESULT CSFVSite::ResizeBorder(LPCRECT prcBorder, IOleInPlaceUIWindow *pUIWindow, BOOL fRameWindow)
{
// Called from the Trident when the equivalent member of its
// IOleInPlaceActiveObject is called by the frame. We don't care
// those cases.
return S_OK;
}
HRESULT CSFVSite::TranslateAccelerator(LPMSG lpMsg, const GUID *pguidCmdGroup, DWORD nCmdID)
{
// Called from the Trident when the equivalent member of its
// IOleInPlaceActiveObject is called by the frame.
// Trap F5 alone and handle the refresh ourselves!
// Note:This code-path will be hit for desktop only if the active desktop
// is turned on.
//
// And probably if focus is on Trident. It's probably good to
// pick this off for Web View too.
//
if ((lpMsg->message == WM_KEYDOWN) && (lpMsg->wParam == VK_F5))
{
CSFVFrame* pFrame = IToClass(CSFVFrame, _cSite, this);
CDefView* pView = IToClass(CDefView, _cFrame, pFrame);
pView->Refresh();
return S_OK;
}
return S_FALSE; // The message was not translated
}
HRESULT CSFVSite::GetOptionKeyPath(BSTR *pbstrKey, DWORD dw)
{
// Trident will default to its own user options.
*pbstrKey = NULL;
return S_FALSE;
}
HRESULT CSFVSite::GetDropTarget(IDropTarget *pDropTarget, IDropTarget **ppDropTarget)
{
HRESULT hr;
CSFVFrame* pFrame = IToClass(CSFVFrame, _cSite, this);
CDefView* pView = IToClass(CDefView, _cFrame, pFrame);
if (!pView->_IsDesktop())
{
hr = S_FALSE; // Let trident delegate in webview folders
}
else
{
if (_dt._pdtFrame == NULL)
{
pView->_psb->QueryInterface(IID_PPV_ARG(IDropTarget, &_dt._pdtFrame));
}
if (_dt._pdtFrame)
{
*ppDropTarget = &_dt;
AddRef();
hr = S_OK;
}
else
{
ASSERT(0);
hr = E_UNEXPECTED;
}
}
return hr;
}
HRESULT CSFVSite::GetExternal(IDispatch **ppDisp)
{
HRESULT hr;
if (ppDisp)
{
*ppDisp = NULL;
hr = S_OK;
}
else
{
hr = E_INVALIDARG;
}
return hr;
}
HRESULT CSFVSite::TranslateUrl(DWORD dwTranslate, OLECHAR *pchURLIn, OLECHAR **ppchURLOut)
{
HRESULT hr;
if (ppchURLOut)
{
*ppchURLOut = NULL;
hr = S_OK;
}
else
{
hr = E_INVALIDARG;
}
return hr;
}
HRESULT CSFVSite::FilterDataObject(IDataObject *pdtobj, IDataObject **ppdtobjRet)
{
HRESULT hr;
if (ppdtobjRet)
{
*ppdtobjRet = NULL;
hr = S_OK;
}
else
{
hr = E_INVALIDARG;
}
return hr;
}