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- /* Copyright (C) 2002-2003 RealVNC Ltd. All Rights Reserved.
- *
- * This is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This software is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- * GNU General Public License for more details.
- *
- * You should have received a copy of the GNU General Public License
- * along with this software; if not, write to the Free Software
- * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307,
- * USA.
- */
-
- // -=- WMHooks.cxx
-
- #include <wm_hooks/wm_hooks.h>
-
- #include <rfb_win32/WMHooks.h>
- #include <rfb_win32/Service.h>
- #include <rfb/Threading.h>
- #include <rfb/LogWriter.h>
-
- #include <list>
-
- using namespace rfb;
- using namespace rfb::win32;
-
- static LogWriter vlog("WMHooks");
-
- class WMHooksThread : public Thread {
- public:
- WMHooksThread() : Thread("WMHookThread"), active(true) {}
- virtual void run();
- virtual Thread* join();
- protected:
- bool active;
- };
-
- WMHooksThread* hook_mgr = 0;
- std::list<WMHooks*> hooks;
- std::list<WMCursorHooks*> cursor_hooks;
- Mutex hook_mgr_lock;
- HCURSOR hook_cursor = (HCURSOR)LoadImage(0, IDC_ARROW, IMAGE_CURSOR, 0, 0, LR_DEFAULTSIZE | LR_SHARED);
-
-
- bool
- StartHookThread() {
- if (hook_mgr) return true;
- vlog.debug("opening hook thread");
- hook_mgr = new WMHooksThread();
- if (!WM_Hooks_Install(hook_mgr->getThreadId(), 0)) {
- vlog.error("failed to initialise hooks");
- delete hook_mgr->join();
- hook_mgr = 0;
- return false;
- }
- hook_mgr->start();
- return true;
- }
-
- void
- StopHookThread() {
- if (!hook_mgr) return;
- if (!hooks.empty() || !cursor_hooks.empty()) return;
- vlog.debug("closing hook thread");
- delete hook_mgr->join();
- hook_mgr = 0;
- }
-
-
- bool
- AddHook(WMHooks* hook) {
- vlog.debug("adding hook");
- Lock l(hook_mgr_lock);
- if (!StartHookThread()) return false;
- hooks.push_back(hook);
- return true;
- }
-
- bool
- AddCursorHook(WMCursorHooks* hook) {
- vlog.debug("adding cursor hook");
- Lock l(hook_mgr_lock);
- if (cursor_hooks.empty()) WM_Hooks_EnableCursorShape(TRUE);
- if (!StartHookThread()) return false;
- cursor_hooks.push_back(hook);
- return true;
- }
-
- bool
- RemHook(WMHooks* hook) {
- {
- vlog.debug("removing hook");
- Lock l(hook_mgr_lock);
- hooks.remove(hook);
- }
- StopHookThread();
- return true;
- }
-
- bool
- RemCursorHook(WMCursorHooks* hook) {
- {
- vlog.debug("removing cursor hook");
- Lock l(hook_mgr_lock);
- cursor_hooks.remove(hook);
- }
- StopHookThread();
- if (cursor_hooks.empty()) WM_Hooks_EnableCursorShape(FALSE);
- return true;
- }
-
- void
- NotifyHooksRegion(const Region& r) {
- Lock l(hook_mgr_lock);
- std::list<WMHooks*>::iterator i;
- for (i=hooks.begin(); i!=hooks.end(); i++) {
- (*i)->new_changes.add_changed(r);
- if (!(*i)->notified) {
- (*i)->notified = true;
- PostMessage((*i)->getHandle(), WM_USER, 0, 0);
- }
- }
- }
-
- void
- NotifyHooksCursor(HCURSOR c) {
- Lock l(hook_mgr_lock);
- hook_cursor = c;
- }
-
- void
- WMHooksThread::run() {
- UINT windowMsg = WM_Hooks_WindowChanged();
- UINT clientAreaMsg = WM_Hooks_WindowClientAreaChanged();
- UINT borderMsg = WM_Hooks_WindowBorderChanged();
- UINT rectangleMsg = WM_Hooks_RectangleChanged();
- UINT cursorMsg = WM_Hooks_CursorChanged();
- #ifdef _DEBUG
- UINT diagnosticMsg = WM_Hooks_Diagnostic();
- #endif
- MSG msg;
- RECT wrect;
- HWND hwnd;
- int count = 0;
-
- vlog.debug("starting hook thread");
-
- while (active && GetMessage(&msg, NULL, 0, 0)) {
- count++;
- if (msg.message == windowMsg) {
- hwnd = (HWND) msg.lParam;
- if (IsWindow(hwnd) && IsWindowVisible(hwnd) && !IsIconic(hwnd) &&
- GetWindowRect(hwnd, &wrect) && !IsRectEmpty(&wrect))
- {
- NotifyHooksRegion(Rect(wrect.left, wrect.top,
- wrect.right, wrect.bottom));
-
- }
- } else if (msg.message == clientAreaMsg) {
- hwnd = (HWND) msg.lParam;
- if (IsWindow(hwnd) && IsWindowVisible(hwnd) && !IsIconic(hwnd) &&
- GetClientRect(hwnd, &wrect) && !IsRectEmpty(&wrect))
- {
- POINT pt = {0,0};
- if (ClientToScreen(hwnd, &pt)) {
- NotifyHooksRegion(Rect(wrect.left+pt.x, wrect.top+pt.y,
- wrect.right+pt.x, wrect.bottom+pt.y));
- }
- }
- } else if (msg.message == borderMsg) {
- hwnd = (HWND) msg.lParam;
- if (IsWindow(hwnd) && IsWindowVisible(hwnd) && !IsIconic(hwnd) &&
- GetWindowRect(hwnd, &wrect) && !IsRectEmpty(&wrect))
- {
- Region changed(Rect(wrect.left, wrect.top, wrect.right, wrect.bottom));
- RECT crect;
- POINT pt = {0,0};
- if (GetClientRect(hwnd, &crect) && ClientToScreen(hwnd, &pt) &&
- !IsRectEmpty(&crect))
- {
- changed.assign_subtract(Rect(crect.left+pt.x, crect.top+pt.y,
- crect.right+pt.x, crect.bottom+pt.y));
- }
- NotifyHooksRegion(changed);
- }
- } else if (msg.message == rectangleMsg) {
- Rect r = Rect(LOWORD(msg.wParam), HIWORD(msg.wParam),
- LOWORD(msg.lParam), HIWORD(msg.lParam));
- if (!r.is_empty()) {
- NotifyHooksRegion(r);
- }
- } else if (msg.message == cursorMsg) {
- NotifyHooksCursor((HCURSOR)msg.lParam);
- #ifdef _DEBUG
- } else if (msg.message == diagnosticMsg) {
- vlog.info("DIAG msg=%x(%d) wnd=%lx", msg.wParam, msg.wParam, msg.lParam);
- #endif
- }
- }
-
- vlog.debug("stopping hook thread - processed %d events", count);
- WM_Hooks_Remove(getThreadId());
- }
-
- Thread*
- WMHooksThread::join() {
- vlog.debug("stopping WMHooks thread");
- active = false;
- PostThreadMessage(thread_id, WM_QUIT, 0, 0);
- vlog.debug("joining WMHooks thread");
- return Thread::join();
- }
-
- // -=- WMHooks class
-
- rfb::win32::WMHooks::WMHooks()
- : clipper(0), new_changes(true), fg_window(0),
- notified(false), MsgWindow(_T("WMHooks")) {
- }
-
- rfb::win32::WMHooks::~WMHooks() {
- RemHook(this);
- if (clipper) delete clipper;
- }
-
- LRESULT
- rfb::win32::WMHooks::processMessage(UINT msg, WPARAM wParam, LPARAM lParam) {
- switch (msg) {
- case WM_USER:
- {
- // *** Yield, to allow the triggering update event to be processed
- // BEFORE we try to grab the resulting changes.
- // *** IMPROVES THINGS NOTICABLY ON WinXP
- Sleep(0);
- // ***
-
- Lock l(hook_mgr_lock);
- notified = false;
- new_changes.get_update(*clipper);
- new_changes.clear();
- }
- break;
- }
- return MsgWindow::processMessage(msg, wParam, lParam);
- }
-
- bool
- rfb::win32::WMHooks::setClipRect(const Rect& r) {
- clip_region = r;
- if (clipper) clipper->set_clip_region(clip_region);
- return true;
- }
-
- bool
- rfb::win32::WMHooks::setUpdateTracker(UpdateTracker* ut) {
- if (clipper) delete clipper;
- clipper = new ClippedUpdateTracker(*ut);
- clipper->set_clip_region(clip_region);
- return AddHook(this);
- }
-
- #ifdef _DEBUG
- void
- rfb::win32::WMHooks::setDiagnosticRange(UINT min, UINT max) {
- WM_Hooks_SetDiagnosticRange(min, max);
- }
- #endif
-
-
- // -=- WMBlockInput class
-
- Mutex blockMutex;
- int blockCount = 0;
-
- rfb::win32::WMBlockInput::WMBlockInput() : active(false) {
- }
-
- rfb::win32::WMBlockInput::~WMBlockInput() {
- blockInputs(false);
- }
-
- bool rfb::win32::WMBlockInput::blockInputs(bool on) {
- if (on == active) return true;
- vlog.debug("blockInput changed");
- Lock l(blockMutex);
- int newCount = blockCount;
- if (on)
- newCount++;
- else
- newCount--;
- if (WM_Hooks_EnableRealInputs(newCount==0, newCount==0)) {
- vlog.debug("set blocking to %d", newCount);
- blockCount = newCount;
- active = on;
- return true;
- }
- return false;
- }
-
-
- // -=- WMCursorHooks class
-
- rfb::win32::WMCursorHooks::WMCursorHooks() {
- }
-
- rfb::win32::WMCursorHooks::~WMCursorHooks() {
- RemCursorHook(this);
- }
-
- bool
- rfb::win32::WMCursorHooks::start() {
- return AddCursorHook(this);
- }
-
- HCURSOR
- rfb::win32::WMCursorHooks::getCursor() const {
- return hook_cursor;
- }
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