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gecko/dom/plugins/base/nsPluginNativeWindowOS2.cpp
Birunthan Mohanathas e47e7345ea Bug 784739 - Switch from NULL to nullptr in dom/plugins/base/; r=ehsan 
--HG--
extra : rebase_source : 827cf2bb75601a723a64593fca5c0cf6632c959c
2013-10-23 16:34:30 -04:00

524 lines
16 KiB
C++
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/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
/*****************************************************************************/
#define INCL_WIN
#include "os2.h"
#include "nsDebug.h"
#include "nsPluginNativeWindow.h"
#include "nsThreadUtils.h"
#include "nsAutoPtr.h"
#include "nsTWeakRef.h"
#define NS_PLUGIN_WINDOW_PROPERTY_ASSOCIATION "MozillaPluginWindowPropertyAssociation"
#define NS_PLUGIN_CUSTOM_MSG_ID "MozFlashUserRelay"
#define WM_USER_FLASH WM_USER+1
#ifndef WM_FOCUSCHANGED
#define WM_FOCUSCHANGED 0x000E
#endif
#define NP_POPUP_API_VERSION 16
#define nsMajorVersion(v) (((int32_t)(v) >> 16) & 0xffff)
#define nsMinorVersion(v) ((int32_t)(v) & 0xffff)
#define versionOK(suppliedV, requiredV) \
(nsMajorVersion(suppliedV) == nsMajorVersion(requiredV) \
&& nsMinorVersion(suppliedV) >= nsMinorVersion(requiredV))
typedef nsTWeakRef<class nsPluginNativeWindowOS2> PluginWindowWeakRef;
extern "C" {
PVOID APIENTRY WinQueryProperty(HWND hwnd, PCSZ pszNameOrAtom);
PVOID APIENTRY WinRemoveProperty(HWND hwnd, PCSZ pszNameOrAtom);
BOOL APIENTRY WinSetProperty(HWND hwnd, PCSZ pszNameOrAtom,
PVOID pvData, ULONG ulFlags);
}
/*****************************************************************************/
static ULONG sWM_FLASHBOUNCEMSG = 0;
/*****************************************************************************/
/**
* PLEvent handling code
*/
class PluginWindowEvent : public nsRunnable
{
public:
PluginWindowEvent();
void Init(const PluginWindowWeakRef &ref, HWND hWnd, ULONG msg, MPARAM mp1, MPARAM mp2);
void Clear();
HWND GetWnd() { return mWnd; };
ULONG GetMsg() { return mMsg; };
MPARAM GetWParam() { return mWParam; };
MPARAM GetLParam() { return mLParam; };
bool InUse() { return mWnd != nullptr; };
NS_DECL_NSIRUNNABLE
protected:
PluginWindowWeakRef mPluginWindowRef;
HWND mWnd;
ULONG mMsg;
MPARAM mWParam;
MPARAM mLParam;
};
PluginWindowEvent::PluginWindowEvent()
{
Clear();
}
void PluginWindowEvent::Clear()
{
mWnd = nullptr;
mMsg = 0;
mWParam = 0;
mLParam = 0;
}
void PluginWindowEvent::Init(const PluginWindowWeakRef &ref, HWND aWnd,
ULONG aMsg, MPARAM mp1, MPARAM mp2)
{
NS_ASSERTION(aWnd != nullptr, "invalid plugin event value");
NS_ASSERTION(mWnd == nullptr, "event already in use");
mPluginWindowRef = ref;
mWnd = aWnd;
mMsg = aMsg;
mWParam = mp1;
mLParam = mp2;
}
/*****************************************************************************/
class nsDelayedPopupsEnabledEvent : public nsRunnable
{
public:
nsDelayedPopupsEnabledEvent(nsNPAPIPluginInstance *inst)
: mInst(inst)
{}
NS_DECL_NSIRUNNABLE
private:
nsRefPtr<nsNPAPIPluginInstance> mInst;
};
NS_IMETHODIMP nsDelayedPopupsEnabledEvent::Run()
{
mInst->PushPopupsEnabledState(false);
return NS_OK;
}
/*****************************************************************************/
/**
* nsPluginNativeWindow OS/2-specific class declaration
*/
typedef enum {
nsPluginType_Unknown = 0,
nsPluginType_Flash,
nsPluginType_Java_vm,
nsPluginType_Other
} nsPluginType;
class nsPluginNativeWindowOS2 : public nsPluginNativeWindow
{
public:
nsPluginNativeWindowOS2();
virtual ~nsPluginNativeWindowOS2();
virtual nsresult CallSetWindow(nsRefPtr<nsNPAPIPluginInstance> &aPluginInstance);
private:
nsresult SubclassAndAssociateWindow();
nsresult UndoSubclassAndAssociateWindow();
public:
// locals
PFNWP GetWindowProc();
PluginWindowEvent* GetPluginWindowEvent(HWND aWnd,
ULONG aMsg,
MPARAM mp1,
MPARAM mp2);
private:
PFNWP mPluginWinProc;
PluginWindowWeakRef mWeakRef;
nsRefPtr<PluginWindowEvent> mCachedPluginWindowEvent;
public:
nsPluginType mPluginType;
};
/*****************************************************************************/
static bool ProcessFlashMessageDelayed(nsPluginNativeWindowOS2 * aWin,
nsNPAPIPluginInstance * aInst,
HWND hWnd, ULONG msg,
MPARAM mp1, MPARAM mp2)
{
NS_ENSURE_TRUE(aWin, NS_ERROR_NULL_POINTER);
NS_ENSURE_TRUE(aInst, NS_ERROR_NULL_POINTER);
if (msg == sWM_FLASHBOUNCEMSG) {
// See PluginWindowEvent::Run() below.
NS_TRY_SAFE_CALL_VOID((aWin->GetWindowProc())(hWnd, WM_USER_FLASH, mp1, mp2),
inst,
NS_PLUGIN_CALL_UNSAFE_TO_REENTER_GECKO);
return TRUE;
}
if (msg != WM_USER_FLASH)
return false; // no need to delay
// do stuff
nsCOMPtr<nsIRunnable> pwe = aWin->GetPluginWindowEvent(hWnd, msg, mp1, mp2);
if (pwe) {
NS_DispatchToCurrentThread(pwe);
return true;
}
return false;
}
/*****************************************************************************/
/**
* New plugin window procedure
*/
static MRESULT EXPENTRY PluginWndProc(HWND hWnd, ULONG msg, MPARAM mp1, MPARAM mp2)
{
nsPluginNativeWindowOS2 * win = (nsPluginNativeWindowOS2 *)
::WinQueryProperty(hWnd, NS_PLUGIN_WINDOW_PROPERTY_ASSOCIATION);
if (!win)
return (MRESULT)TRUE;
// The DispatchEvent(NS_PLUGIN_ACTIVATE) below can trigger a reentrant focus
// event which might destroy us. Hold a strong ref on the plugin instance
// to prevent that, bug 374229.
nsRefPtr<nsNPAPIPluginInstance> inst;
win->GetPluginInstance(inst);
// check plugin mime type and cache whether it is Flash or java-vm or not;
// flash and java-vm will need special treatment later
if (win->mPluginType == nsPluginType_Unknown) {
if (inst) {
const char* mimetype = nullptr;
inst->GetMIMEType(&mimetype);
if (mimetype) {
if (!strcmp(mimetype, "application/x-shockwave-flash"))
win->mPluginType = nsPluginType_Flash;
else if (!strcmp(mimetype, "application/x-java-vm"))
win->mPluginType = nsPluginType_Java_vm;
else
win->mPluginType = nsPluginType_Other;
}
}
}
bool enablePopups = false;
// Activate/deactivate mouse capture on the plugin widget
// here, before we pass the Windows event to the plugin
// because its possible our widget won't get paired events
// (see bug 131007) and we'll look frozen. Note that this
// is also done in ChildWindow::DispatchMouseEvent.
switch (msg) {
case WM_BUTTON1DOWN:
case WM_BUTTON2DOWN:
case WM_BUTTON3DOWN: {
nsCOMPtr<nsIWidget> widget;
win->GetPluginWidget(getter_AddRefs(widget));
if (widget)
widget->CaptureMouse(true);
break;
}
case WM_BUTTON1UP:
case WM_BUTTON2UP:
case WM_BUTTON3UP: {
if (msg == WM_BUTTON1UP)
enablePopups = true;
nsCOMPtr<nsIWidget> widget;
win->GetPluginWidget(getter_AddRefs(widget));
if (widget)
widget->CaptureMouse(false);
break;
}
case WM_CHAR:
// Ignore repeating keydown messages...
if (SHORT1FROMMP(mp1) & KC_PREVDOWN)
break;
enablePopups = true;
break;
// When the child of a plugin gets the focus, nsWindow doesn't get
// a WM_FOCUSCHANGED msg, so plugin and window activation events
// don't happen. This fixes the problem by synthesizing a msg
// that makes it look like the plugin widget just got the focus.
case WM_FOCUSCHANGE: {
// Some plugins don't pass this msg on. If the default window proc
// doesn't receive it, window activation/deactivation won't happen.
WinDefWindowProc(hWnd, msg, mp1, mp2);
// If focus is being gained, and the plugin widget neither lost nor
// gained the focus, then a child just got it from some other window.
// If that other window was neither a child of the widget nor owned
// by a child of the widget (e.g. a popup menu), post a WM_FOCUSCHANGED
// msg that identifies the child as the window losing focus. After
// nsWindow:: ActivatePlugin() activates the plugin, it will restore
// the focus to the child.
if (SHORT1FROMMP(mp2) && (HWND)mp1 != hWnd) {
HWND hFocus = WinQueryFocus(HWND_DESKTOP);
if (hFocus != hWnd &&
WinIsChild(hFocus, hWnd) &&
!WinIsChild((HWND)mp1, hWnd) &&
!WinIsChild(WinQueryWindow((HWND)mp1, QW_OWNER), hWnd)) {
WinPostMsg(hWnd, WM_FOCUSCHANGED, (MPARAM)hFocus, mp2);
}
}
break;
}
}
// Macromedia Flash plugin may flood the message queue with some special messages
// (WM_USER+1) causing 100% CPU consumption and GUI freeze, see mozilla bug 132759;
// we can prevent this from happening by delaying the processing such messages;
if (win->mPluginType == nsPluginType_Flash) {
if (ProcessFlashMessageDelayed(win, inst, hWnd, msg, mp1, mp2))
return (MRESULT)TRUE;
}
if (enablePopups && inst) {
uint16_t apiVersion;
if (NS_SUCCEEDED(inst->GetPluginAPIVersion(&apiVersion)) &&
!versionOK(apiVersion, NP_POPUP_API_VERSION))
inst->PushPopupsEnabledState(true);
}
MRESULT res = (MRESULT)TRUE;
if (win->mPluginType == nsPluginType_Java_vm)
NS_TRY_SAFE_CALL_RETURN(res, ::WinDefWindowProc(hWnd, msg, mp1, mp2), inst,
NS_PLUGIN_CALL_UNSAFE_TO_REENTER_GECKO);
else
NS_TRY_SAFE_CALL_RETURN(res, (win->GetWindowProc())(hWnd, msg, mp1, mp2), inst,
NS_PLUGIN_CALL_UNSAFE_TO_REENTER_GECKO);
if (inst) {
// Popups are enabled (were enabled before the call to
// CallWindowProc()). Some plugins (at least the flash player)
// post messages from their key handlers etc that delay the actual
// processing, so we need to delay the disabling of popups so that
// popups remain enabled when the flash player ends up processing
// the actual key handlers. We do this by posting an event that
// does the disabling, this way our disabling will happen after
// the handlers in the plugin are done.
// Note that it's not fatal if any of this fails (which won't
// happen unless we're out of memory anyways) since the plugin
// code will pop any popup state pushed by this plugin on
// destruction.
nsCOMPtr<nsIRunnable> event = new nsDelayedPopupsEnabledEvent(inst);
if (event)
NS_DispatchToCurrentThread(event);
}
return res;
}
/*****************************************************************************/
/**
* nsPluginNativeWindowOS2 implementation
*/
nsPluginNativeWindowOS2::nsPluginNativeWindowOS2() : nsPluginNativeWindow()
{
// initialize the struct fields
window = nullptr;
x = 0;
y = 0;
width = 0;
height = 0;
mPluginWinProc = nullptr;
mPluginType = nsPluginType_Unknown;
// once the atom has been added, it won't be deleted
if (!sWM_FLASHBOUNCEMSG) {
sWM_FLASHBOUNCEMSG = ::WinFindAtom(WinQuerySystemAtomTable(),
NS_PLUGIN_CUSTOM_MSG_ID);
if (!sWM_FLASHBOUNCEMSG)
sWM_FLASHBOUNCEMSG = ::WinAddAtom(WinQuerySystemAtomTable(),
NS_PLUGIN_CUSTOM_MSG_ID);
}
}
nsPluginNativeWindowOS2::~nsPluginNativeWindowOS2()
{
// clear weak reference to self to prevent any pending events from
// dereferencing this.
mWeakRef.forget();
}
PFNWP nsPluginNativeWindowOS2::GetWindowProc()
{
return mPluginWinProc;
}
NS_IMETHODIMP PluginWindowEvent::Run()
{
nsPluginNativeWindowOS2 *win = mPluginWindowRef.get();
if (!win)
return NS_OK;
HWND hWnd = GetWnd();
if (!hWnd)
return NS_OK;
nsRefPtr<nsNPAPIPluginInstance> inst;
win->GetPluginInstance(inst);
if (GetMsg() == WM_USER_FLASH)
// XXX Unwind issues related to runnable event callback depth for this
// event and destruction of the plugin. (Bug 493601)
::WinPostMsg(hWnd, sWM_FLASHBOUNCEMSG, GetWParam(), GetLParam());
else
// Currently not used, but added so that processing events here
// is more generic.
NS_TRY_SAFE_CALL_VOID((win->GetWindowProc())
(hWnd, GetMsg(), GetWParam(), GetLParam()),
inst,
NS_PLUGIN_CALL_UNSAFE_TO_REENTER_GECKO);
Clear();
return NS_OK;
}
PluginWindowEvent*
nsPluginNativeWindowOS2::GetPluginWindowEvent(HWND aWnd, ULONG aMsg, MPARAM aMp1, MPARAM aMp2)
{
if (!mWeakRef) {
mWeakRef = this;
if (!mWeakRef)
return nullptr;
}
PluginWindowEvent *event;
// We have the ability to alloc if needed in case in the future some plugin
// should post multiple PostMessages. However, this could lead to many
// alloc's per second which could become a performance issue. See bug 169247.
if (!mCachedPluginWindowEvent) {
event = new PluginWindowEvent();
if (!event)
return nullptr;
mCachedPluginWindowEvent = event;
}
else
if (mCachedPluginWindowEvent->InUse()) {
event = new PluginWindowEvent();
if (!event)
return nullptr;
}
else
event = mCachedPluginWindowEvent;
event->Init(mWeakRef, aWnd, aMsg, aMp1, aMp2);
return event;
}
nsresult nsPluginNativeWindowOS2::CallSetWindow(nsRefPtr<nsNPAPIPluginInstance> &aPluginInstance)
{
// check the incoming instance, null indicates that window is going away and we are
// not interested in subclassing business any more, undo and don't subclass
if (!aPluginInstance) {
UndoSubclassAndAssociateWindow();
}
nsPluginNativeWindow::CallSetWindow(aPluginInstance);
if (aPluginInstance)
SubclassAndAssociateWindow();
return NS_OK;
}
nsresult nsPluginNativeWindowOS2::SubclassAndAssociateWindow()
{
if (type != NPWindowTypeWindow)
return NS_ERROR_FAILURE;
HWND hWnd = (HWND)window;
if (!hWnd)
return NS_ERROR_FAILURE;
// check if we need to re-subclass
PFNWP currentWndProc = (PFNWP)::WinQueryWindowPtr(hWnd, QWP_PFNWP);
if (PluginWndProc == currentWndProc)
return NS_OK;
mPluginWinProc = ::WinSubclassWindow(hWnd, PluginWndProc);
if (!mPluginWinProc)
return NS_ERROR_FAILURE;
#ifdef DEBUG
nsPluginNativeWindowOS2 * win = (nsPluginNativeWindowOS2 *)
::WinQueryProperty(hWnd, NS_PLUGIN_WINDOW_PROPERTY_ASSOCIATION);
NS_ASSERTION(!win || (win == this), "plugin window already has property and this is not us");
#endif
if (!::WinSetProperty(hWnd, NS_PLUGIN_WINDOW_PROPERTY_ASSOCIATION, (PVOID)this, 0))
return NS_ERROR_FAILURE;
return NS_OK;
}
nsresult nsPluginNativeWindowOS2::UndoSubclassAndAssociateWindow()
{
// release plugin instance
SetPluginInstance(nullptr);
// remove window property
HWND hWnd = (HWND)window;
if (::WinIsWindow(/*HAB*/0, hWnd))
::WinRemoveProperty(hWnd, NS_PLUGIN_WINDOW_PROPERTY_ASSOCIATION);
// restore the original win proc
// but only do this if this were us last time
if (mPluginWinProc) {
PFNWP currentWndProc = (PFNWP)::WinQueryWindowPtr(hWnd, QWP_PFNWP);
if (currentWndProc == PluginWndProc)
::WinSubclassWindow(hWnd, mPluginWinProc);
}
return NS_OK;
}
nsresult PLUG_NewPluginNativeWindow(nsPluginNativeWindow ** aPluginNativeWindow)
{
NS_ENSURE_ARG_POINTER(aPluginNativeWindow);
*aPluginNativeWindow = new nsPluginNativeWindowOS2();
return *aPluginNativeWindow ? NS_OK : NS_ERROR_OUT_OF_MEMORY;
}
nsresult PLUG_DeletePluginNativeWindow(nsPluginNativeWindow * aPluginNativeWindow)
{
NS_ENSURE_ARG_POINTER(aPluginNativeWindow);
nsPluginNativeWindowOS2 *p = (nsPluginNativeWindowOS2 *)aPluginNativeWindow;
delete p;
return NS_OK;
}
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