diff options
Diffstat (limited to 'source/3rd-party/SDL2/src/video/windows/SDL_windowsmessagebox.c')
| -rw-r--r-- | source/3rd-party/SDL2/src/video/windows/SDL_windowsmessagebox.c | 905 |
1 files changed, 905 insertions, 0 deletions
diff --git a/source/3rd-party/SDL2/src/video/windows/SDL_windowsmessagebox.c b/source/3rd-party/SDL2/src/video/windows/SDL_windowsmessagebox.c new file mode 100644 index 0000000..9ddb9e2 --- /dev/null +++ b/source/3rd-party/SDL2/src/video/windows/SDL_windowsmessagebox.c @@ -0,0 +1,905 @@ +/* + Simple DirectMedia Layer + Copyright (C) 1997-2018 Sam Lantinga <slouken@libsdl.org> + + This software is provided 'as-is', without any express or implied + warranty. In no event will the authors be held liable for any damages + arising from the use of this software. + + Permission is granted to anyone to use this software for any purpose, + including commercial applications, and to alter it and redistribute it + freely, subject to the following restrictions: + + 1. The origin of this software must not be misrepresented; you must not + claim that you wrote the original software. If you use this software + in a product, an acknowledgment in the product documentation would be + appreciated but is not required. + 2. Altered source versions must be plainly marked as such, and must not be + misrepresented as being the original software. + 3. This notice may not be removed or altered from any source distribution. +*/ +#include "../../SDL_internal.h" + +#if SDL_VIDEO_DRIVER_WINDOWS + +#ifdef HAVE_LIMITS_H +#include <limits.h> +#else +#ifndef SIZE_MAX +#define SIZE_MAX ((size_t)-1) +#endif +#endif + +#include "../../core/windows/SDL_windows.h" + +#include "SDL_assert.h" +#include "SDL_windowsvideo.h" +#include "SDL_windowstaskdialog.h" + +#ifndef SS_EDITCONTROL +#define SS_EDITCONTROL 0x2000 +#endif + +#ifndef IDOK +#define IDOK 1 +#endif + +#ifndef IDCANCEL +#define IDCANCEL 2 +#endif + +/* Custom dialog return codes */ +#define IDCLOSED 20 +#define IDINVALPTRINIT 50 +#define IDINVALPTRCOMMAND 51 +#define IDINVALPTRSETFOCUS 52 +#define IDINVALPTRDLGITEM 53 +/* First button ID */ +#define IDBUTTONINDEX0 100 + +#define DLGITEMTYPEBUTTON 0x0080 +#define DLGITEMTYPESTATIC 0x0082 + +/* Windows only sends the lower 16 bits of the control ID when a button + * gets clicked. There are also some predefined and custom IDs that lower + * the available number further. 2^16 - 101 buttons should be enough for + * everyone, no need to make the code more complex. + */ +#define MAX_BUTTONS (0xffff - 100) + + +/* Display a Windows message box */ + +#pragma pack(push, 1) + +typedef struct +{ + WORD dlgVer; + WORD signature; + DWORD helpID; + DWORD exStyle; + DWORD style; + WORD cDlgItems; + short x; + short y; + short cx; + short cy; +} DLGTEMPLATEEX; + +typedef struct +{ + DWORD helpID; + DWORD exStyle; + DWORD style; + short x; + short y; + short cx; + short cy; + DWORD id; +} DLGITEMTEMPLATEEX; + +#pragma pack(pop) + +typedef struct +{ + DLGTEMPLATEEX* lpDialog; + Uint8 *data; + size_t size; + size_t used; + WORD numbuttons; +} WIN_DialogData; + +static SDL_bool GetButtonIndex(const SDL_MessageBoxData *messageboxdata, Uint32 flags, size_t *i) +{ + for (*i = 0; *i < (size_t)messageboxdata->numbuttons; ++*i) { + if (messageboxdata->buttons[*i].flags & flags) { + return SDL_TRUE; + } + } + return SDL_FALSE; +} + +static INT_PTR MessageBoxDialogProc(HWND hDlg, UINT iMessage, WPARAM wParam, LPARAM lParam) +{ + const SDL_MessageBoxData *messageboxdata; + size_t buttonindex; + + switch ( iMessage ) { + case WM_INITDIALOG: + if (lParam == 0) { + EndDialog(hDlg, IDINVALPTRINIT); + return TRUE; + } + messageboxdata = (const SDL_MessageBoxData *)lParam; + SetWindowLongPtr(hDlg, GWLP_USERDATA, lParam); + + if (GetButtonIndex(messageboxdata, SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT, &buttonindex)) { + /* Focus on the first default return-key button */ + HWND buttonctl = GetDlgItem(hDlg, (int)(IDBUTTONINDEX0 + buttonindex)); + if (buttonctl == NULL) { + EndDialog(hDlg, IDINVALPTRDLGITEM); + } + PostMessage(hDlg, WM_NEXTDLGCTL, (WPARAM)buttonctl, TRUE); + } else { + /* Give the focus to the dialog window instead */ + SetFocus(hDlg); + } + return FALSE; + case WM_SETFOCUS: + messageboxdata = (const SDL_MessageBoxData *)GetWindowLongPtr(hDlg, GWLP_USERDATA); + if (messageboxdata == NULL) { + EndDialog(hDlg, IDINVALPTRSETFOCUS); + return TRUE; + } + + /* Let the default button be focused if there is one. Otherwise, prevent any initial focus. */ + if (GetButtonIndex(messageboxdata, SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT, &buttonindex)) { + return FALSE; + } + return TRUE; + case WM_COMMAND: + messageboxdata = (const SDL_MessageBoxData *)GetWindowLongPtr(hDlg, GWLP_USERDATA); + if (messageboxdata == NULL) { + EndDialog(hDlg, IDINVALPTRCOMMAND); + return TRUE; + } + + /* Return the ID of the button that was pushed */ + if (wParam == IDOK) { + if (GetButtonIndex(messageboxdata, SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT, &buttonindex)) { + EndDialog(hDlg, IDBUTTONINDEX0 + buttonindex); + } + } else if (wParam == IDCANCEL) { + if (GetButtonIndex(messageboxdata, SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT, &buttonindex)) { + EndDialog(hDlg, IDBUTTONINDEX0 + buttonindex); + } else { + /* Closing of window was requested by user or system. It would be rude not to comply. */ + EndDialog(hDlg, IDCLOSED); + } + } else if (wParam >= IDBUTTONINDEX0 && (int)wParam - IDBUTTONINDEX0 < messageboxdata->numbuttons) { + EndDialog(hDlg, wParam); + } + return TRUE; + + default: + break; + } + return FALSE; +} + +static SDL_bool ExpandDialogSpace(WIN_DialogData *dialog, size_t space) +{ + /* Growing memory in 64 KiB steps. */ + const size_t sizestep = 0x10000; + size_t size = dialog->size; + + if (size == 0) { + /* Start with 4 KiB or a multiple of 64 KiB to fit the data. */ + size = 0x1000; + if (SIZE_MAX - sizestep < space) { + size = space; + } else if (space > size) { + size = (space + sizestep) & ~(sizestep - 1); + } + } else if (SIZE_MAX - dialog->used < space) { + SDL_OutOfMemory(); + return SDL_FALSE; + } else if (SIZE_MAX - (dialog->used + space) < sizestep) { + /* Close to the maximum. */ + size = dialog->used + space; + } else if (size < dialog->used + space) { + /* Round up to the next 64 KiB block. */ + size = dialog->used + space; + size += sizestep - size % sizestep; + } + + if (size > dialog->size) { + void *data = SDL_realloc(dialog->data, size); + if (!data) { + SDL_OutOfMemory(); + return SDL_FALSE; + } + dialog->data = data; + dialog->size = size; + dialog->lpDialog = (DLGTEMPLATEEX*)dialog->data; + } + return SDL_TRUE; +} + +static SDL_bool AlignDialogData(WIN_DialogData *dialog, size_t size) +{ + size_t padding = (dialog->used % size); + + if (!ExpandDialogSpace(dialog, padding)) { + return SDL_FALSE; + } + + dialog->used += padding; + + return SDL_TRUE; +} + +static SDL_bool AddDialogData(WIN_DialogData *dialog, const void *data, size_t size) +{ + if (!ExpandDialogSpace(dialog, size)) { + return SDL_FALSE; + } + + SDL_memcpy(dialog->data+dialog->used, data, size); + dialog->used += size; + + return SDL_TRUE; +} + +static SDL_bool AddDialogString(WIN_DialogData *dialog, const char *string) +{ + WCHAR *wstring; + WCHAR *p; + size_t count; + SDL_bool status; + + if (!string) { + string = ""; + } + + wstring = WIN_UTF8ToString(string); + if (!wstring) { + return SDL_FALSE; + } + + /* Find out how many characters we have, including null terminator */ + count = 0; + for (p = wstring; *p; ++p) { + ++count; + } + ++count; + + status = AddDialogData(dialog, wstring, count*sizeof(WCHAR)); + SDL_free(wstring); + return status; +} + +static int s_BaseUnitsX; +static int s_BaseUnitsY; +static void Vec2ToDLU(short *x, short *y) +{ + SDL_assert(s_BaseUnitsX != 0); /* we init in WIN_ShowMessageBox(), which is the only public function... */ + + *x = MulDiv(*x, 4, s_BaseUnitsX); + *y = MulDiv(*y, 8, s_BaseUnitsY); +} + + +static SDL_bool AddDialogControl(WIN_DialogData *dialog, WORD type, DWORD style, DWORD exStyle, int x, int y, int w, int h, int id, const char *caption, WORD ordinal) +{ + DLGITEMTEMPLATEEX item; + WORD marker = 0xFFFF; + WORD extraData = 0; + + SDL_zero(item); + item.style = style; + item.exStyle = exStyle; + item.x = x; + item.y = y; + item.cx = w; + item.cy = h; + item.id = id; + + Vec2ToDLU(&item.x, &item.y); + Vec2ToDLU(&item.cx, &item.cy); + + if (!AlignDialogData(dialog, sizeof(DWORD))) { + return SDL_FALSE; + } + if (!AddDialogData(dialog, &item, sizeof(item))) { + return SDL_FALSE; + } + if (!AddDialogData(dialog, &marker, sizeof(marker))) { + return SDL_FALSE; + } + if (!AddDialogData(dialog, &type, sizeof(type))) { + return SDL_FALSE; + } + if (type == DLGITEMTYPEBUTTON || (type == DLGITEMTYPESTATIC && caption != NULL)) { + if (!AddDialogString(dialog, caption)) { + return SDL_FALSE; + } + } else { + if (!AddDialogData(dialog, &marker, sizeof(marker))) { + return SDL_FALSE; + } + if (!AddDialogData(dialog, &ordinal, sizeof(ordinal))) { + return SDL_FALSE; + } + } + if (!AddDialogData(dialog, &extraData, sizeof(extraData))) { + return SDL_FALSE; + } + if (type == DLGITEMTYPEBUTTON) { + dialog->numbuttons++; + } + ++dialog->lpDialog->cDlgItems; + + return SDL_TRUE; +} + +static SDL_bool AddDialogStaticText(WIN_DialogData *dialog, int x, int y, int w, int h, const char *text) +{ + DWORD style = WS_VISIBLE | WS_CHILD | SS_LEFT | SS_NOPREFIX | SS_EDITCONTROL | WS_GROUP; + return AddDialogControl(dialog, DLGITEMTYPESTATIC, style, 0, x, y, w, h, -1, text, 0); +} + +static SDL_bool AddDialogStaticIcon(WIN_DialogData *dialog, int x, int y, int w, int h, Uint16 ordinal) +{ + DWORD style = WS_VISIBLE | WS_CHILD | SS_ICON | WS_GROUP; + return AddDialogControl(dialog, DLGITEMTYPESTATIC, style, 0, x, y, w, h, -2, NULL, ordinal); +} + +static SDL_bool AddDialogButton(WIN_DialogData *dialog, int x, int y, int w, int h, const char *text, int id, SDL_bool isDefault) +{ + DWORD style = WS_VISIBLE | WS_CHILD | WS_TABSTOP; + if (isDefault) { + style |= BS_DEFPUSHBUTTON; + } else { + style |= BS_PUSHBUTTON; + } + /* The first button marks the start of the group. */ + if (dialog->numbuttons == 0) { + style |= WS_GROUP; + } + return AddDialogControl(dialog, DLGITEMTYPEBUTTON, style, 0, x, y, w, h, IDBUTTONINDEX0 + dialog->numbuttons, text, 0); +} + +static void FreeDialogData(WIN_DialogData *dialog) +{ + SDL_free(dialog->data); + SDL_free(dialog); +} + +static WIN_DialogData *CreateDialogData(int w, int h, const char *caption) +{ + WIN_DialogData *dialog; + DLGTEMPLATEEX dialogTemplate; + WORD WordToPass; + + SDL_zero(dialogTemplate); + dialogTemplate.dlgVer = 1; + dialogTemplate.signature = 0xffff; + dialogTemplate.style = (WS_CAPTION | DS_CENTER | DS_SHELLFONT); + dialogTemplate.x = 0; + dialogTemplate.y = 0; + dialogTemplate.cx = w; + dialogTemplate.cy = h; + Vec2ToDLU(&dialogTemplate.cx, &dialogTemplate.cy); + + dialog = (WIN_DialogData *)SDL_calloc(1, sizeof(*dialog)); + if (!dialog) { + return NULL; + } + + if (!AddDialogData(dialog, &dialogTemplate, sizeof(dialogTemplate))) { + FreeDialogData(dialog); + return NULL; + } + + /* No menu */ + WordToPass = 0; + if (!AddDialogData(dialog, &WordToPass, 2)) { + FreeDialogData(dialog); + return NULL; + } + + /* No custom class */ + if (!AddDialogData(dialog, &WordToPass, 2)) { + FreeDialogData(dialog); + return NULL; + } + + /* title */ + if (!AddDialogString(dialog, caption)) { + FreeDialogData(dialog); + return NULL; + } + + /* Font stuff */ + { + /* + * We want to use the system messagebox font. + */ + BYTE ToPass; + + NONCLIENTMETRICSA NCM; + NCM.cbSize = sizeof(NCM); + SystemParametersInfoA(SPI_GETNONCLIENTMETRICS, 0, &NCM, 0); + + /* Font size - convert to logical font size for dialog parameter. */ + { + HDC ScreenDC = GetDC(NULL); + int LogicalPixelsY = GetDeviceCaps(ScreenDC, LOGPIXELSY); + if (!LogicalPixelsY) /* This can happen if the application runs out of GDI handles */ + LogicalPixelsY = 72; + WordToPass = (WORD)(-72 * NCM.lfMessageFont.lfHeight / LogicalPixelsY); + ReleaseDC(NULL, ScreenDC); + } + + if (!AddDialogData(dialog, &WordToPass, 2)) { + FreeDialogData(dialog); + return NULL; + } + + /* Font weight */ + WordToPass = (WORD)NCM.lfMessageFont.lfWeight; + if (!AddDialogData(dialog, &WordToPass, 2)) { + FreeDialogData(dialog); + return NULL; + } + + /* italic? */ + ToPass = NCM.lfMessageFont.lfItalic; + if (!AddDialogData(dialog, &ToPass, 1)) { + FreeDialogData(dialog); + return NULL; + } + + /* charset? */ + ToPass = NCM.lfMessageFont.lfCharSet; + if (!AddDialogData(dialog, &ToPass, 1)) { + FreeDialogData(dialog); + return NULL; + } + + /* font typeface. */ + if (!AddDialogString(dialog, NCM.lfMessageFont.lfFaceName)) { + FreeDialogData(dialog); + return NULL; + } + } + + return dialog; +} + +/* Escaping ampersands is necessary to disable mnemonics in dialog controls. + * The caller provides a char** for dst and a size_t* for dstlen where the + * address of the work buffer and its size will be stored. Their values must be + * NULL and 0 on the first call. src is the string to be escaped. On error, the + * function returns NULL and, on success, returns a pointer to the escaped + * sequence as a read-only string that is valid until the next call or until the + * work buffer is freed. Once all strings have been processed, it's the caller's + * responsibilty to free the work buffer with SDL_free, even on errors. + */ +static const char *EscapeAmpersands(char **dst, size_t *dstlen, const char *src) +{ + char *newdst; + size_t ampcount = 0; + size_t srclen = 0; + + if (src == NULL) { + return NULL; + } + + while (src[srclen]) { + if (src[srclen] == '&') { + ampcount++; + } + srclen++; + } + srclen++; + + if (ampcount == 0) { + /* Nothing to do. */ + return src; + } + if (SIZE_MAX - srclen < ampcount) { + return NULL; + } + if (*dst == NULL || *dstlen < srclen + ampcount) { + /* Allocating extra space in case the next strings are a bit longer. */ + size_t extraspace = SIZE_MAX - (srclen + ampcount); + if (extraspace > 512) { + extraspace = 512; + } + *dstlen = srclen + ampcount + extraspace; + SDL_free(*dst); + *dst = NULL; + newdst = SDL_malloc(*dstlen); + if (newdst == NULL) { + return NULL; + } + *dst = newdst; + } else { + newdst = *dst; + } + + /* The escape character is the ampersand itself. */ + while (srclen--) { + if (*src == '&') { + *newdst++ = '&'; + } + *newdst++ = *src++; + } + + return *dst; +} + +/* This function is called if a Task Dialog is unsupported. */ +static int +WIN_ShowOldMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid) +{ + WIN_DialogData *dialog; + int i, x, y, retval; + const SDL_MessageBoxButtonData *buttons = messageboxdata->buttons; + HFONT DialogFont; + SIZE Size; + RECT TextSize; + wchar_t* wmessage; + TEXTMETRIC TM; + HDC FontDC; + INT_PTR result; + char *ampescape = NULL; + size_t ampescapesize = 0; + Uint16 defbuttoncount = 0; + Uint16 icon = 0; + + HWND ParentWindow = NULL; + + const int ButtonWidth = 88; + const int ButtonHeight = 26; + const int TextMargin = 16; + const int ButtonMargin = 12; + const int IconWidth = GetSystemMetrics(SM_CXICON); + const int IconHeight = GetSystemMetrics(SM_CYICON); + const int IconMargin = 20; + + if (messageboxdata->numbuttons > MAX_BUTTONS) { + return SDL_SetError("Number of butons exceeds limit of %d", MAX_BUTTONS); + } + + switch (messageboxdata->flags) { + case SDL_MESSAGEBOX_ERROR: + icon = (Uint16)(size_t)IDI_ERROR; + break; + case SDL_MESSAGEBOX_WARNING: + icon = (Uint16)(size_t)IDI_WARNING; + break; + case SDL_MESSAGEBOX_INFORMATION: + icon = (Uint16)(size_t)IDI_INFORMATION; + break; + } + + /* Jan 25th, 2013 - dant@fleetsa.com + * + * + * I've tried to make this more reasonable, but I've run in to a lot + * of nonsense. + * + * The original issue is the code was written in pixels and not + * dialog units (DLUs). All DialogBox functions use DLUs, which + * vary based on the selected font (yay). + * + * According to MSDN, the most reliable way to convert is via + * MapDialogUnits, which requires an HWND, which we don't have + * at time of template creation. + * + * We do however have: + * The system font (DLU width 8 for me) + * The font we select for the dialog (DLU width 6 for me) + * + * Based on experimentation, *neither* of these return the value + * actually used. Stepping in to MapDialogUnits(), the conversion + * is fairly clear, and uses 7 for me. + * + * As a result, some of this is hacky to ensure the sizing is + * somewhat correct. + * + * Honestly, a long term solution is to use CreateWindow, not CreateDialog. + * + + * + * In order to get text dimensions we need to have a DC with the desired font. + * I'm assuming a dialog box in SDL is rare enough we can to the create. + */ + FontDC = CreateCompatibleDC(0); + + { + /* Create a duplicate of the font used in system message boxes. */ + LOGFONT lf; + NONCLIENTMETRICS NCM; + NCM.cbSize = sizeof(NCM); + SystemParametersInfo(SPI_GETNONCLIENTMETRICS, 0, &NCM, 0); + lf = NCM.lfMessageFont; + DialogFont = CreateFontIndirect(&lf); + } + + /* Select the font in to our DC */ + SelectObject(FontDC, DialogFont); + + { + /* Get the metrics to try and figure our DLU conversion. */ + GetTextMetrics(FontDC, &TM); + + /* Calculation from the following documentation: + * https://support.microsoft.com/en-gb/help/125681/how-to-calculate-dialog-base-units-with-non-system-based-font + * This fixes bug 2137, dialog box calculation with a fixed-width system font + */ + { + SIZE extent; + GetTextExtentPoint32A(FontDC, "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz", 52, &extent); + s_BaseUnitsX = (extent.cx / 26 + 1) / 2; + } + /*s_BaseUnitsX = TM.tmAveCharWidth + 1;*/ + s_BaseUnitsY = TM.tmHeight; + } + + /* Measure the *pixel* size of the string. */ + wmessage = WIN_UTF8ToString(messageboxdata->message); + SDL_zero(TextSize); + DrawText(FontDC, wmessage, -1, &TextSize, DT_CALCRECT | DT_LEFT | DT_NOPREFIX | DT_EDITCONTROL); + + /* Add margins and some padding for hangs, etc. */ + TextSize.left += TextMargin; + TextSize.right += TextMargin + 2; + TextSize.top += TextMargin; + TextSize.bottom += TextMargin + 2; + + /* Done with the DC, and the string */ + DeleteDC(FontDC); + SDL_free(wmessage); + + /* Increase the size of the dialog by some border spacing around the text. */ + Size.cx = TextSize.right - TextSize.left; + Size.cy = TextSize.bottom - TextSize.top; + Size.cx += TextMargin * 2; + Size.cy += TextMargin * 2; + + /* Make dialog wider and shift text over for the icon. */ + if (icon) { + Size.cx += IconMargin + IconWidth; + TextSize.left += IconMargin + IconWidth; + TextSize.right += IconMargin + IconWidth; + } + + /* Ensure the size is wide enough for all of the buttons. */ + if (Size.cx < messageboxdata->numbuttons * (ButtonWidth + ButtonMargin) + ButtonMargin) + Size.cx = messageboxdata->numbuttons * (ButtonWidth + ButtonMargin) + ButtonMargin; + + /* Reset the height to the icon size if it is actually bigger than the text. */ + if (icon && Size.cy < IconMargin * 2 + IconHeight) { + Size.cy = IconMargin * 2 + IconHeight; + } + + /* Add vertical space for the buttons and border. */ + Size.cy += ButtonHeight + TextMargin; + + dialog = CreateDialogData(Size.cx, Size.cy, messageboxdata->title); + if (!dialog) { + return -1; + } + + if (icon && ! AddDialogStaticIcon(dialog, IconMargin, IconMargin, IconWidth, IconHeight, icon)) { + FreeDialogData(dialog); + return -1; + } + + if (!AddDialogStaticText(dialog, TextSize.left, TextSize.top, TextSize.right - TextSize.left, TextSize.bottom - TextSize.top, messageboxdata->message)) { + FreeDialogData(dialog); + return -1; + } + + /* Align the buttons to the right/bottom. */ + x = Size.cx - (ButtonWidth + ButtonMargin) * messageboxdata->numbuttons; + y = Size.cy - ButtonHeight - ButtonMargin; + for (i = messageboxdata->numbuttons - 1; i >= 0; --i) { + SDL_bool isdefault = SDL_FALSE; + const char *buttontext; + + if (buttons[i].flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) { + defbuttoncount++; + if (defbuttoncount == 1) { + isdefault = SDL_TRUE; + } + } + + buttontext = EscapeAmpersands(&escape, &escapesize, buttons[i].text); + if (buttontext == NULL || !AddDialogButton(dialog, x, y, ButtonWidth, ButtonHeight, buttontext, buttons[i].buttonid, isdefault)) { + FreeDialogData(dialog); + SDL_free(ampescape); + return -1; + } + x += ButtonWidth + ButtonMargin; + } + SDL_free(ampescape); + + /* If we have a parent window, get the Instance and HWND for them + * so that our little dialog gets exclusive focus at all times. */ + if (messageboxdata->window) { + ParentWindow = ((SDL_WindowData*)messageboxdata->window->driverdata)->hwnd; + } + + result = DialogBoxIndirectParam(NULL, (DLGTEMPLATE*)dialog->lpDialog, ParentWindow, (DLGPROC)MessageBoxDialogProc, (LPARAM)messageboxdata); + if (result >= IDBUTTONINDEX0 && result - IDBUTTONINDEX0 < messageboxdata->numbuttons) { + *buttonid = messageboxdata->buttons[(messageboxdata->numbuttons - 1) - (result - IDBUTTONINDEX0)].buttonid; + retval = 0; + } else if (result == IDCLOSED) { + /* Dialog window closed by user or system. */ + /* This could use a special return code. */ + retval = 0; + *buttonid = -1; + } else { + if (result == 0) { + SDL_SetError("Invalid parent window handle"); + } else if (result == -1) { + SDL_SetError("The message box encountered an error."); + } else if (result == IDINVALPTRINIT || result == IDINVALPTRSETFOCUS || result == IDINVALPTRCOMMAND) { + SDL_SetError("Invalid message box pointer in dialog procedure"); + } else if (result == IDINVALPTRDLGITEM) { + SDL_SetError("Couldn't find dialog control of the default enter-key button"); + } else { + SDL_SetError("An unknown error occured"); + } + retval = -1; + } + + FreeDialogData(dialog); + return retval; +} + +/* TaskDialogIndirect procedure + * This is because SDL targets Windows XP (0x501), so this is not defined in the platform SDK. + */ +typedef HRESULT(FAR WINAPI *TASKDIALOGINDIRECTPROC)(const TASKDIALOGCONFIG *pTaskConfig, int *pnButton, int *pnRadioButton, BOOL *pfVerificationFlagChecked); + +int +WIN_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid) +{ + HWND ParentWindow = NULL; + wchar_t *wmessage; + wchar_t *wtitle; + TASKDIALOGCONFIG TaskConfig; + TASKDIALOG_BUTTON *pButtons; + TASKDIALOG_BUTTON *pButton; + HMODULE hComctl32; + TASKDIALOGINDIRECTPROC pfnTaskDialogIndirect; + HRESULT hr; + char *ampescape = NULL; + size_t ampescapesize = 0; + int nButton; + int nCancelButton; + int i; + + if (SIZE_MAX / sizeof(TASKDIALOG_BUTTON) < messageboxdata->numbuttons) { + return SDL_OutOfMemory(); + } + + /* If we cannot load comctl32.dll use the old messagebox! */ + hComctl32 = LoadLibrary(TEXT("Comctl32.dll")); + if (hComctl32 == NULL) { + return WIN_ShowOldMessageBox(messageboxdata, buttonid); + } + + /* If TaskDialogIndirect doesn't exist use the old messagebox! + This will fail prior to Windows Vista. + The manifest file in the application may require targeting version 6 of comctl32.dll, even + when we use LoadLibrary here! + If you don't want to bother with manifests, put this #pragma in your app's source code somewhere: + pragma comment(linker,"\"/manifestdependency:type='win32' name='Microsoft.Windows.Common-Controls' version='6.0.0.0' processorArchitecture='*' publicKeyToken='6595b64144ccf1df' language='*'\"") + */ + pfnTaskDialogIndirect = (TASKDIALOGINDIRECTPROC) GetProcAddress(hComctl32, "TaskDialogIndirect"); + if (pfnTaskDialogIndirect == NULL) { + FreeLibrary(hComctl32); + return WIN_ShowOldMessageBox(messageboxdata, buttonid); + } + + /* If we have a parent window, get the Instance and HWND for them + so that our little dialog gets exclusive focus at all times. */ + if (messageboxdata->window) { + ParentWindow = ((SDL_WindowData *) messageboxdata->window->driverdata)->hwnd; + } + + wmessage = WIN_UTF8ToString(messageboxdata->message); + wtitle = WIN_UTF8ToString(messageboxdata->title); + + SDL_zero(TaskConfig); + TaskConfig.cbSize = sizeof (TASKDIALOGCONFIG); + TaskConfig.hwndParent = ParentWindow; + TaskConfig.dwFlags = TDF_SIZE_TO_CONTENT; + TaskConfig.pszWindowTitle = wtitle; + if (messageboxdata->flags & SDL_MESSAGEBOX_ERROR) { + TaskConfig.pszMainIcon = TD_ERROR_ICON; + } else if (messageboxdata->flags & SDL_MESSAGEBOX_WARNING) { + TaskConfig.pszMainIcon = TD_WARNING_ICON; + } else if (messageboxdata->flags & SDL_MESSAGEBOX_INFORMATION) { + TaskConfig.pszMainIcon = TD_INFORMATION_ICON; + } else { + TaskConfig.pszMainIcon = NULL; + } + + TaskConfig.pszContent = wmessage; + TaskConfig.cButtons = messageboxdata->numbuttons; + pButtons = SDL_malloc(sizeof (TASKDIALOG_BUTTON) * messageboxdata->numbuttons); + TaskConfig.nDefaultButton = 0; + nCancelButton = 0; + for (i = 0; i < messageboxdata->numbuttons; i++) + { + const char *buttontext; + pButton = &pButtons[messageboxdata->numbuttons-1-i]; + if (messageboxdata->buttons[i].flags & SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT) { + nCancelButton = messageboxdata->buttons[i].buttonid; + pButton->nButtonID = 2; + } else { + pButton->nButtonID = messageboxdata->buttons[i].buttonid + 1; + if (pButton->nButtonID >= 2) { + pButton->nButtonID++; + } + } + buttontext = EscapeAmpersands(&escape, &escapesize, messageboxdata->buttons[i].text); + if (buttontext == NULL) { + int j; + FreeLibrary(hComctl32); + SDL_free(ampescape); + SDL_free(wmessage); + SDL_free(wtitle); + for (j = 0; j < i; j++) { + SDL_free((wchar_t *) pButtons[j].pszButtonText); + } + SDL_free(pButtons); + return -1; + } + pButton->pszButtonText = WIN_UTF8ToString(buttontext); + if (messageboxdata->buttons[i].flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) { + TaskConfig.nDefaultButton = pButton->nButtonID; + } + } + TaskConfig.pButtons = pButtons; + + /* Show the Task Dialog */ + hr = pfnTaskDialogIndirect(&TaskConfig, &nButton, NULL, NULL); + + /* Free everything */ + FreeLibrary(hComctl32); + SDL_free(ampescape); + SDL_free(wmessage); + SDL_free(wtitle); + for (i = 0; i < messageboxdata->numbuttons; i++) { + SDL_free((wchar_t *) pButtons[i].pszButtonText); + } + SDL_free(pButtons); + + /* Check the Task Dialog was successful and give the result */ + if (SUCCEEDED(hr)) { + if (nButton == 2) { + *buttonid = nCancelButton; + } else if (nButton > 2) { + *buttonid = nButton-1-1; + } else { + *buttonid = nButton-1; + } + return 0; + } + + /* We failed showing the Task Dialog, use the old message box! */ + return WIN_ShowOldMessageBox(messageboxdata, buttonid); +} + +#endif /* SDL_VIDEO_DRIVER_WINDOWS */ + +/* vi: set ts=4 sw=4 expandtab: */ |