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diff --git a/linden/indra/llwindow/llwindow.cpp b/linden/indra/llwindow/llwindow.cpp
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+++ b/linden/indra/llwindow/llwindow.cpp
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+/** 
+ * @file llwindow.cpp
+ * @brief Basic graphical window class
+ *
+ * Copyright (c) 2001-2007, Linden Research, Inc.
+ * 
+ * The source code in this file ("Source Code") is provided by Linden Lab
+ * to you under the terms of the GNU General Public License, version 2.0
+ * ("GPL"), unless you have obtained a separate licensing agreement
+ * ("Other License"), formally executed by you and Linden Lab.  Terms of
+ * the GPL can be found in doc/GPL-license.txt in this distribution, or
+ * online at http://secondlife.com/developers/opensource/gplv2
+ * 
+ * There are special exceptions to the terms and conditions of the GPL as
+ * it is applied to this Source Code. View the full text of the exception
+ * in the file doc/FLOSS-exception.txt in this software distribution, or
+ * online at http://secondlife.com/developers/opensource/flossexception
+ * 
+ * By copying, modifying or distributing this software, you acknowledge
+ * that you have read and understood your obligations described above,
+ * and agree to abide by those obligations.
+ * 
+ * ALL LINDEN LAB SOURCE CODE IS PROVIDED "AS IS." LINDEN LAB MAKES NO
+ * WARRANTIES, EXPRESS, IMPLIED OR OTHERWISE, REGARDING ITS ACCURACY,
+ * COMPLETENESS OR PERFORMANCE.
+ */
+
+#include "linden_common.h"
+#include "llwindowheadless.h"
+
+#if LL_MESA_HEADLESS
+#include "llwindowmesaheadless.h"
+#elif LL_SDL
+#include "llwindowsdl.h"
+#elif LL_WINDOWS
+#include "llwindowwin32.h"
+#elif LL_DARWIN
+#include "llwindowmacosx.h"
+#elif LL_LINUX
+#include "llwindowlinux.h" // currently just a dummy wrapper
+#endif
+
+#include "llerror.h"
+#include "llkeyboard.h"
+#include "linked_lists.h"
+
+//static instance for default callbacks
+LLWindowCallbacks       LLWindow::sDefaultCallbacks;
+
+//
+// LLWindowCallbacks
+//
+
+LLSplashScreen *gSplashScreenp = NULL;
+BOOL gDebugClicks = FALSE;
+BOOL gDebugWindowProc = FALSE;
+
+const S32 gURLProtocolWhitelistCount = 3;
+const char* gURLProtocolWhitelist[] = { "file", "http", "https" };
+
+// CP: added a handler list - this is what's used to open the protocol and is based on registry entry
+//         only meaningful difference currently is that file: protocols are opened using http:
+//         since no protocol handler exists in registry for file:
+//     Important - these lists should match - protocol to handler
+const char* gURLProtocolWhitelistHandler[] = { "http", "http", "https" };       
+
+BOOL LLWindowCallbacks::handleTranslatedKeyDown(const KEY key, const MASK mask, BOOL repeated)
+{
+        return FALSE;
+}
+
+
+BOOL LLWindowCallbacks::handleTranslatedKeyUp(const KEY key, const MASK mask)
+{
+        return FALSE;
+}
+
+void LLWindowCallbacks::handleScanKey(KEY key, BOOL key_down, BOOL key_up, BOOL key_level)
+{
+}
+
+BOOL LLWindowCallbacks::handleUnicodeChar(llwchar uni_char, MASK mask)
+{
+        return FALSE;
+}
+
+
+BOOL LLWindowCallbacks::handleMouseDown(LLWindow *window, const LLCoordGL pos, MASK mask)
+{
+        return FALSE;
+}
+
+BOOL LLWindowCallbacks::handleMouseUp(LLWindow *window, const LLCoordGL pos, MASK mask)
+{
+        return FALSE;
+}
+
+void LLWindowCallbacks::handleMouseLeave(LLWindow *window)
+{
+        return;
+}
+
+BOOL LLWindowCallbacks::handleCloseRequest(LLWindow *window)
+{
+        //allow the window to close
+        return TRUE;
+}
+
+void LLWindowCallbacks::handleQuit(LLWindow *window)
+{
+        if(LLWindowManager::destroyWindow(window) == FALSE)     
+        {
+                llerrs << "LLWindowCallbacks::handleQuit() : Couldn't destroy window" << llendl;
+        }
+}
+
+BOOL LLWindowCallbacks::handleRightMouseDown(LLWindow *window, const LLCoordGL pos, MASK mask)
+{
+        return FALSE;
+}
+
+BOOL LLWindowCallbacks::handleRightMouseUp(LLWindow *window, const LLCoordGL pos, MASK mask)
+{
+        return FALSE;
+}
+
+BOOL LLWindowCallbacks::handleActivate(LLWindow *window, BOOL activated)
+{
+        return FALSE;
+}
+
+void LLWindowCallbacks::handleMouseMove(LLWindow *window, const LLCoordGL pos, MASK mask)
+{
+}
+
+void LLWindowCallbacks::handleScrollWheel(LLWindow *window, S32 clicks)
+{
+}
+
+void LLWindowCallbacks::handleResize(LLWindow *window, const S32 width, const S32 height)
+{
+}
+
+void LLWindowCallbacks::handleFocus(LLWindow *window)
+{
+}
+
+void LLWindowCallbacks::handleFocusLost(LLWindow *window)
+{
+}
+
+void LLWindowCallbacks::handleMenuSelect(LLWindow *window, const S32 menu_item)
+{
+}
+
+BOOL LLWindowCallbacks::handlePaint(LLWindow *window, const S32 x, const S32 y, 
+                                                                        const S32 width, const S32 height)
+{
+        return FALSE;
+}
+
+BOOL LLWindowCallbacks::handleDoubleClick(LLWindow *window, const LLCoordGL pos, MASK mask)
+{
+        return FALSE;
+}
+
+void LLWindowCallbacks::handleWindowBlock(LLWindow *window)
+{
+}
+
+void LLWindowCallbacks::handleWindowUnblock(LLWindow *window)
+{
+}
+
+void LLWindowCallbacks::handleDataCopy(LLWindow *window, S32 data_type, void *data)
+{
+}
+
+
+S32 OSMessageBox(const char* text, const char* caption, U32 type)
+{
+        // Properly hide the splash screen when displaying the message box
+        BOOL was_visible = FALSE;
+        if (LLSplashScreen::isVisible())
+        {
+                was_visible = TRUE;
+                LLSplashScreen::hide();
+        }
+
+        S32 result = 0;
+#if LL_MESA_HEADLESS // !!! *FIX: (???)
+        llwarns << "OSMessageBox: " << text << llendl;
+        return OSBTN_OK;
+#elif LL_WINDOWS
+        result = OSMessageBoxWin32(text, caption, type);
+#elif LL_DARWIN
+        result = OSMessageBoxMacOSX(text, caption, type);
+#elif LL_SDL
+        result = OSMessageBoxSDL(text, caption, type);
+#else
+#error("OSMessageBox not implemented for this platform!")
+#endif
+
+        if (was_visible)
+        {
+                LLSplashScreen::show();
+        }
+
+        return result;
+}
+
+
+//
+// LLWindow
+//
+
+LLWindow::LLWindow(BOOL fullscreen, U32 flags)
+        : mCallbacks(&sDefaultCallbacks),
+          mPostQuit(TRUE),
+          mFullscreen(fullscreen),
+          mFullscreenWidth(0),
+          mFullscreenHeight(0),
+          mFullscreenBits(0),
+          mFullscreenRefresh(0),
+          mSupportedResolutions(NULL),
+          mNumSupportedResolutions(0),
+          mCurrentCursor(UI_CURSOR_ARROW),
+          mCursorHidden(FALSE),
+          mBusyCount(0),
+          mIsMouseClipping(FALSE),
+          mSwapMethod(SWAP_METHOD_UNDEFINED),
+          mHideCursorPermanent(FALSE),
+          mFlags(flags)
+{
+}
+        
+// virtual
+void LLWindow::incBusyCount()
+{
+        ++mBusyCount;
+}
+
+// virtual
+void LLWindow::decBusyCount()
+{
+        if (mBusyCount > 0)
+        {
+                --mBusyCount;
+        }
+}
+
+void LLWindow::setCallbacks(LLWindowCallbacks *callbacks)
+{
+        mCallbacks = callbacks;
+        if (gKeyboard)
+        {
+                gKeyboard->setCallbacks(callbacks);
+        }
+}
+
+//
+// LLSplashScreen
+//
+
+// static
+bool LLSplashScreen::isVisible()
+{
+        return gSplashScreenp ? true: false;
+}
+
+// static
+LLSplashScreen *LLSplashScreen::create()
+{
+#if LL_MESA_HEADLESS || LL_SDL  // !!! *FIX: (???)
+        return 0;
+#elif LL_WINDOWS
+        return new LLSplashScreenWin32;
+#elif LL_DARWIN
+        return new LLSplashScreenMacOSX;
+#else
+#error("LLSplashScreen not implemented on this platform!")
+#endif
+}
+
+
+//static
+void LLSplashScreen::show()
+{
+        if (!gSplashScreenp)
+        {
+#if LL_WINDOWS && !LL_MESA_HEADLESS
+                gSplashScreenp = new LLSplashScreenWin32;
+#elif LL_DARWIN
+                gSplashScreenp = new LLSplashScreenMacOSX;
+#endif
+                if (gSplashScreenp)
+                {
+                        gSplashScreenp->showImpl();
+                }
+        }
+}
+
+//static
+void LLSplashScreen::update(const char* str)
+{
+        LLSplashScreen::show();
+        if (gSplashScreenp)
+        {
+                gSplashScreenp->updateImpl(str);
+        }
+}
+
+//static
+void LLSplashScreen::hide()
+{
+        if (gSplashScreenp)
+        {
+                gSplashScreenp->hideImpl();
+        }
+        delete gSplashScreenp;
+        gSplashScreenp = NULL;
+}
+
+//
+// LLWindowManager
+//
+
+// TODO: replace with std::set
+static LLLinkedList<LLWindow> sWindowList;
+
+LLWindow* LLWindowManager::createWindow(
+        char *title,
+        char *name,
+        LLCoordScreen upper_left,
+        LLCoordScreen size,
+        U32 flags,
+        BOOL fullscreen, 
+        BOOL clearBg,
+        BOOL disable_vsync,
+        BOOL use_gl,
+        BOOL ignore_pixel_depth)
+{
+        return createWindow(
+                title, name, upper_left.mX, upper_left.mY, size.mX, size.mY, flags, 
+                fullscreen, clearBg, disable_vsync, use_gl, ignore_pixel_depth);
+}
+
+LLWindow* LLWindowManager::createWindow(
+        char *title, char *name, S32 x, S32 y, S32 width, S32 height, U32 flags,
+        BOOL fullscreen, 
+        BOOL clearBg,
+        BOOL disable_vsync,
+        BOOL use_gl,
+        BOOL ignore_pixel_depth)
+{
+        LLWindow* new_window;
+
+        if (use_gl)
+        {
+#if LL_MESA_HEADLESS
+                new_window = new LLWindowMesaHeadless(
+                        title, name, x, y, width, height, flags, 
+                        fullscreen, clearBg, disable_vsync, use_gl, ignore_pixel_depth);
+#elif LL_SDL
+                new_window = new LLWindowSDL(
+                        title, x, y, width, height, flags, 
+                        fullscreen, clearBg, disable_vsync, use_gl, ignore_pixel_depth);
+#elif LL_WINDOWS
+                new_window = new LLWindowWin32(
+                        title, name, x, y, width, height, flags, 
+                        fullscreen, clearBg, disable_vsync, use_gl, ignore_pixel_depth);
+#elif LL_DARWIN
+                new_window = new LLWindowMacOSX(
+                        title, name, x, y, width, height, flags, 
+                        fullscreen, clearBg, disable_vsync, use_gl, ignore_pixel_depth);
+#elif LL_LINUX
+                new_window = new LLWindowLinux(
+                        title, name, x, y, width, height, flags, 
+                        fullscreen, clearBg, disable_vsync, use_gl, ignore_pixel_depth);
+#endif
+        }
+        else
+        {
+                new_window = new LLWindowHeadless(
+                        title, name, x, y, width, height, flags, 
+                        fullscreen, clearBg, disable_vsync, use_gl, ignore_pixel_depth);
+        }
+
+        if (FALSE == new_window->isValid())
+        {
+                delete new_window;
+                llwarns << "LLWindowManager::create() : Error creating window." << llendl;
+                return NULL;
+        }
+        sWindowList.addDataAtEnd(new_window);
+        return new_window;
+}
+
+BOOL LLWindowManager::destroyWindow(LLWindow* window)
+{
+        if (!sWindowList.checkData(window))
+        {
+                llerrs << "LLWindowManager::destroyWindow() : Window pointer not valid, this window doesn't exist!" 
+                        << llendl;
+                return FALSE;
+        }
+
+        window->close();
+
+        sWindowList.removeData(window);
+
+        delete window;
+
+        return TRUE;
+}
+
+BOOL LLWindowManager::isWindowValid(LLWindow *window)
+{
+        return sWindowList.checkData(window);
+}