mirror of
https://gitlab.winehq.org/wine/wine-gecko.git
synced 2024-09-13 09:24:08 -07:00
345 lines
11 KiB
C++
345 lines
11 KiB
C++
/* -*- Mode: c++; tab-width: 2; indent-tabs-mode: nil; -*- */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/ipc/RPCChannel.h"
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#include "nsAppShell.h"
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#include "nsToolkit.h"
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#include "nsThreadUtils.h"
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#include "WinTaskbar.h"
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#include "WinMouseScrollHandler.h"
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#include "nsWindowDefs.h"
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#include "nsString.h"
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#include "nsIMM32Handler.h"
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#include "mozilla/widget/AudioSession.h"
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#include "mozilla/HangMonitor.h"
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// For skidmark code
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#include <windows.h>
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#include <tlhelp32.h>
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const PRUnichar* kAppShellEventId = L"nsAppShell:EventID";
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const PRUnichar* kTaskbarButtonEventId = L"TaskbarButtonCreated";
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// The maximum time we allow before forcing a native event callback
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#define NATIVE_EVENT_STARVATION_LIMIT mozilla::TimeDuration::FromSeconds(1)
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static UINT sMsgId;
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static UINT sTaskbarButtonCreatedMsg;
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/* static */
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UINT nsAppShell::GetTaskbarButtonCreatedMessage() {
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return sTaskbarButtonCreatedMsg;
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}
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namespace mozilla {
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namespace crashreporter {
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void LSPAnnotate();
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} // namespace crashreporter
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} // namespace mozilla
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using mozilla::crashreporter::LSPAnnotate;
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//-------------------------------------------------------------------------
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static bool PeekUIMessage(MSG* aMsg)
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{
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// For avoiding deadlock between our process and plugin process by
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// mouse wheel messages, we're handling actually when we receive one of
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// following internal messages which is posted by native mouse wheel message
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// handler. Any other events, especially native modifier key events, should
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// not be handled between native message and posted internal message because
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// it may make different modifier key state or mouse cursor position between
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// them.
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if (mozilla::widget::MouseScrollHandler::IsWaitingInternalMessage() &&
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::PeekMessageW(aMsg, NULL, MOZ_WM_MOUSEWHEEL_FIRST,
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MOZ_WM_MOUSEWHEEL_LAST, PM_REMOVE)) {
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return true;
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}
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MSG keyMsg, imeMsg, mouseMsg, *pMsg = 0;
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bool haveKeyMsg, haveIMEMsg, haveMouseMsg;
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haveKeyMsg = ::PeekMessageW(&keyMsg, NULL, WM_KEYFIRST, WM_IME_KEYLAST, PM_NOREMOVE);
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haveIMEMsg = ::PeekMessageW(&imeMsg, NULL, NS_WM_IMEFIRST, NS_WM_IMELAST, PM_NOREMOVE);
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haveMouseMsg = ::PeekMessageW(&mouseMsg, NULL, WM_MOUSEFIRST, WM_MOUSELAST, PM_NOREMOVE);
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if (haveKeyMsg) {
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pMsg = &keyMsg;
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}
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if (haveIMEMsg && (!pMsg || imeMsg.time < pMsg->time)) {
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pMsg = &imeMsg;
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}
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if (pMsg && !nsIMM32Handler::CanOptimizeKeyAndIMEMessages(pMsg)) {
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return false;
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}
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if (haveMouseMsg && (!pMsg || mouseMsg.time < pMsg->time)) {
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pMsg = &mouseMsg;
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}
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if (!pMsg) {
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return false;
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}
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return ::PeekMessageW(aMsg, NULL, pMsg->message, pMsg->message, PM_REMOVE);
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}
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/*static*/ LRESULT CALLBACK
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nsAppShell::EventWindowProc(HWND hwnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
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{
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if (uMsg == sMsgId) {
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nsAppShell *as = reinterpret_cast<nsAppShell *>(lParam);
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as->NativeEventCallback();
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NS_RELEASE(as);
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return TRUE;
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}
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return DefWindowProc(hwnd, uMsg, wParam, lParam);
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}
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nsAppShell::~nsAppShell()
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{
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if (mEventWnd) {
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// DestroyWindow doesn't do anything when called from a non UI thread.
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// Since mEventWnd was created on the UI thread, it must be destroyed on
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// the UI thread.
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SendMessage(mEventWnd, WM_CLOSE, 0, 0);
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}
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}
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nsresult
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nsAppShell::Init()
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{
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#ifdef MOZ_CRASHREPORTER
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LSPAnnotate();
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#endif
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mLastNativeEventScheduled = TimeStamp::Now();
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if (!sMsgId)
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sMsgId = RegisterWindowMessageW(kAppShellEventId);
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sTaskbarButtonCreatedMsg = ::RegisterWindowMessageW(kTaskbarButtonEventId);
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NS_ASSERTION(sTaskbarButtonCreatedMsg, "Could not register taskbar button creation message");
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WNDCLASSW wc;
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HINSTANCE module = GetModuleHandle(NULL);
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const PRUnichar *const kWindowClass = L"nsAppShell:EventWindowClass";
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if (!GetClassInfoW(module, kWindowClass, &wc)) {
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wc.style = 0;
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wc.lpfnWndProc = EventWindowProc;
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wc.cbClsExtra = 0;
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wc.cbWndExtra = 0;
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wc.hInstance = module;
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wc.hIcon = NULL;
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wc.hCursor = NULL;
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wc.hbrBackground = (HBRUSH) NULL;
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wc.lpszMenuName = (LPCWSTR) NULL;
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wc.lpszClassName = kWindowClass;
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RegisterClassW(&wc);
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}
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mEventWnd = CreateWindowW(kWindowClass, L"nsAppShell:EventWindow",
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0, 0, 0, 10, 10, NULL, NULL, module, NULL);
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NS_ENSURE_STATE(mEventWnd);
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return nsBaseAppShell::Init();
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}
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/**
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* This is some temporary code to keep track of where in memory dlls are
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* loaded. This is useful in case someone calls into a dll that has been
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* unloaded. This code lets us see which dll used to be loaded at the given
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* called address.
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*/
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#if defined(_MSC_VER) && defined(_M_IX86)
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#define LOADEDMODULEINFO_STRSIZE 23
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#define NUM_LOADEDMODULEINFO 250
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struct LoadedModuleInfo {
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void* mStartAddr;
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void* mEndAddr;
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char mName[LOADEDMODULEINFO_STRSIZE + 1];
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};
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static LoadedModuleInfo* sLoadedModules = 0;
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static void
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CollectNewLoadedModules()
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{
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HANDLE hModuleSnap = INVALID_HANDLE_VALUE;
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MODULEENTRY32W module;
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// Take a snapshot of all modules in our process.
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hModuleSnap = CreateToolhelp32Snapshot(TH32CS_SNAPMODULE, 0);
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if (hModuleSnap == INVALID_HANDLE_VALUE)
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return;
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// Set the size of the structure before using it.
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module.dwSize = sizeof(MODULEENTRY32W);
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// Now walk the module list of the process,
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// and display information about each module
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bool done = !Module32FirstW(hModuleSnap, &module);
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while (!done) {
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NS_LossyConvertUTF16toASCII moduleName(module.szModule);
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bool found = false;
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PRUint32 i;
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for (i = 0; i < NUM_LOADEDMODULEINFO &&
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sLoadedModules[i].mStartAddr; ++i) {
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if (sLoadedModules[i].mStartAddr == module.modBaseAddr &&
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!strcmp(moduleName.get(),
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sLoadedModules[i].mName)) {
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found = true;
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break;
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}
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}
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if (!found && i < NUM_LOADEDMODULEINFO) {
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sLoadedModules[i].mStartAddr = module.modBaseAddr;
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sLoadedModules[i].mEndAddr = module.modBaseAddr + module.modBaseSize;
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strncpy(sLoadedModules[i].mName, moduleName.get(),
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LOADEDMODULEINFO_STRSIZE);
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sLoadedModules[i].mName[LOADEDMODULEINFO_STRSIZE] = 0;
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}
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done = !Module32NextW(hModuleSnap, &module);
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}
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PRUint32 i;
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for (i = 0; i < NUM_LOADEDMODULEINFO &&
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sLoadedModules[i].mStartAddr; ++i) {}
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CloseHandle(hModuleSnap);
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}
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NS_IMETHODIMP
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nsAppShell::Run(void)
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{
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LoadedModuleInfo modules[NUM_LOADEDMODULEINFO];
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memset(modules, 0, sizeof(modules));
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sLoadedModules = modules;
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// Ignore failure; failing to start the application is not exactly an
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// appropriate response to failing to start an audio session.
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mozilla::widget::StartAudioSession();
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nsresult rv = nsBaseAppShell::Run();
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mozilla::widget::StopAudioSession();
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// Don't forget to null this out!
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sLoadedModules = nullptr;
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return rv;
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}
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#endif
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void
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nsAppShell::DoProcessMoreGeckoEvents()
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{
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// Called by nsBaseAppShell's NativeEventCallback() after it has finished
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// processing pending gecko events and there are still gecko events pending
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// for the thread. (This can happen if NS_ProcessPendingEvents reached it's
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// starvation timeout limit.) The default behavior in nsBaseAppShell is to
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// call ScheduleNativeEventCallback to post a follow up native event callback
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// message. This triggers an additional call to NativeEventCallback for more
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// gecko event processing.
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// There's a deadlock risk here with certain internal Windows modal loops. In
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// our dispatch code, we prioritize messages so that input is handled first.
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// However Windows modal dispatch loops often prioritize posted messages. If
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// we find ourselves in a tight gecko timer loop where NS_ProcessPendingEvents
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// takes longer than the timer duration, NS_HasPendingEvents(thread) will
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// always be true. ScheduleNativeEventCallback will be called on every
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// NativeEventCallback callback, and in a Windows modal dispatch loop, the
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// callback message will be processed first -> input gets starved, dead lock.
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// To avoid, don't post native callback messages from NativeEventCallback
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// when we're in a modal loop. This gets us back into the Windows modal
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// dispatch loop dispatching input messages. Once we drop out of the modal
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// loop, we use mNativeCallbackPending to fire off a final NativeEventCallback
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// if we need it, which insures NS_ProcessPendingEvents gets called and all
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// gecko events get processed.
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if (mEventloopNestingLevel < 2) {
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OnDispatchedEvent(nullptr);
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mNativeCallbackPending = false;
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} else {
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mNativeCallbackPending = true;
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}
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}
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void
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nsAppShell::ScheduleNativeEventCallback()
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{
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// Post a message to the hidden message window
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NS_ADDREF_THIS(); // will be released when the event is processed
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// Time stamp this event so we can detect cases where the event gets
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// dropping in sub classes / modal loops we do not control.
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mLastNativeEventScheduled = TimeStamp::Now();
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::PostMessage(mEventWnd, sMsgId, 0, reinterpret_cast<LPARAM>(this));
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}
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bool
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nsAppShell::ProcessNextNativeEvent(bool mayWait)
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{
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#if defined(_MSC_VER) && defined(_M_IX86)
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if (sXPCOMHasLoadedNewDLLs && sLoadedModules) {
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sXPCOMHasLoadedNewDLLs = false;
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CollectNewLoadedModules();
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}
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#endif
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// Notify ipc we are spinning a (possibly nested) gecko event loop.
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mozilla::ipc::RPCChannel::NotifyGeckoEventDispatch();
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bool gotMessage = false;
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do {
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MSG msg;
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bool uiMessage = PeekUIMessage(&msg);
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// Give priority to keyboard and mouse messages.
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if (uiMessage ||
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PeekMessageW(&msg, NULL, 0, 0, PM_REMOVE)) {
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gotMessage = true;
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if (msg.message == WM_QUIT) {
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::PostQuitMessage(msg.wParam);
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Exit();
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} else {
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// If we had UI activity we would be processing it now so we know we
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// have either kUIActivity or kActivityNoUIAVail.
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mozilla::HangMonitor::NotifyActivity(
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uiMessage ? mozilla::HangMonitor::kUIActivity :
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mozilla::HangMonitor::kActivityNoUIAVail);
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::TranslateMessage(&msg);
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::DispatchMessageW(&msg);
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}
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} else if (mayWait) {
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// Block and wait for any posted application message
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mozilla::HangMonitor::Suspend();
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::WaitMessage();
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}
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} while (!gotMessage && mayWait);
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// See DoProcessNextNativeEvent, mEventloopNestingLevel will be
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// one when a modal loop unwinds.
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if (mNativeCallbackPending && mEventloopNestingLevel == 1)
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DoProcessMoreGeckoEvents();
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// Check for starved native callbacks. If we haven't processed one
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// of these events in NATIVE_EVENT_STARVATION_LIMIT, fire one off.
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if ((TimeStamp::Now() - mLastNativeEventScheduled) >
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NATIVE_EVENT_STARVATION_LIMIT) {
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ScheduleNativeEventCallback();
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}
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return gotMessage;
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}
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