diff options
Diffstat (limited to 'Source/3rdParty/SDL2/src/video/windows/SDL_windowsmessagebox.c')
| -rw-r--r-- | Source/3rdParty/SDL2/src/video/windows/SDL_windowsmessagebox.c | 496 |
1 files changed, 496 insertions, 0 deletions
diff --git a/Source/3rdParty/SDL2/src/video/windows/SDL_windowsmessagebox.c b/Source/3rdParty/SDL2/src/video/windows/SDL_windowsmessagebox.c new file mode 100644 index 0000000..924b412 --- /dev/null +++ b/Source/3rdParty/SDL2/src/video/windows/SDL_windowsmessagebox.c @@ -0,0 +1,496 @@ +/* + 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 + +#include "../../core/windows/SDL_windows.h" + +#include "SDL_assert.h" +#include "SDL_windowsvideo.h" + + +#ifndef SS_EDITCONTROL +#define SS_EDITCONTROL 0x2000 +#endif + +/* 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; +} WIN_DialogData; + + +static INT_PTR MessageBoxDialogProc(HWND hDlg, UINT iMessage, WPARAM wParam, LPARAM lParam) +{ + switch ( iMessage ) { + case WM_COMMAND: + /* Return the ID of the button that was pushed */ + EndDialog(hDlg, LOWORD(wParam)); + return TRUE; + + default: + break; + } + return FALSE; +} + +static SDL_bool ExpandDialogSpace(WIN_DialogData *dialog, size_t space) +{ + size_t size = dialog->size; + + if (size == 0) { + size = space; + } else { + while ((dialog->used + space) > size) { + size *= 2; + } + } + 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) +{ + 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 (!AddDialogString(dialog, caption)) { + return SDL_FALSE; + } + if (!AddDialogData(dialog, &extraData, sizeof(extraData))) { + return SDL_FALSE; + } + ++dialog->lpDialog->cDlgItems; + + return SDL_TRUE; +} + +static SDL_bool AddDialogStatic(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; + return AddDialogControl(dialog, 0x0082, style, 0, x, y, w, h, -1, text); +} + +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; + if (isDefault) { + style |= BS_DEFPUSHBUTTON; + } else { + style |= BS_PUSHBUTTON; + } + return AddDialogControl(dialog, 0x0080, style, 0, x, y, w, h, id, text); +} + +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; +} + +int +WIN_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid) +{ + WIN_DialogData *dialog; + int i, x, y; + const SDL_MessageBoxButtonData *buttons = messageboxdata->buttons; + HFONT DialogFont; + SIZE Size; + RECT TextSize; + wchar_t* wmessage; + TEXTMETRIC TM; + + HWND ParentWindow = NULL; + + const int ButtonWidth = 88; + const int ButtonHeight = 26; + const int TextMargin = 16; + const int ButtonMargin = 12; + + + /* 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. + */ + HDC 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); + + /* Add some padding for hangs, etc. */ + TextSize.right += 2; + TextSize.bottom += 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; + + /* 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; + + /* 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 (!AddDialogStatic(dialog, TextMargin, TextMargin, 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; + + if (buttons[i].flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT) { + isDefault = SDL_TRUE; + } else { + isDefault = SDL_FALSE; + } + if (!AddDialogButton(dialog, x, y, ButtonWidth, ButtonHeight, buttons[i].text, buttons[i].buttonid, isDefault)) { + FreeDialogData(dialog); + return -1; + } + x += ButtonWidth + ButtonMargin; + } + + /* 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; + } + + *buttonid = (int)DialogBoxIndirect(NULL, (DLGTEMPLATE*)dialog->lpDialog, ParentWindow, (DLGPROC)MessageBoxDialogProc); + + FreeDialogData(dialog); + return 0; +} + +#endif /* SDL_VIDEO_DRIVER_WINDOWS */ + +/* vi: set ts=4 sw=4 expandtab: */ |