src/video/x11/SDL_x11messagebox.c
author Ryan C. Gordon <icculus@icculus.org>
Thu, 28 May 2015 00:30:21 -0400
changeset 9657 fbc01731d914
parent 9619 b94b6d0bff0f
child 9695 363a7880b4f7
permissions -rw-r--r--
X11: Add Xdbe support to message boxes (thanks, Melker!).

Without this, message boxes with a lot of text will noticibly flicker as
you mouse over buttons.

Fixes Bugzilla #2343.
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/*
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  Simple DirectMedia Layer
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  Copyright (C) 1997-2015 Sam Lantinga <slouken@libsdl.org>
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  This software is provided 'as-is', without any express or implied
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  warranty.  In no event will the authors be held liable for any damages
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  arising from the use of this software.
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  Permission is granted to anyone to use this software for any purpose,
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  including commercial applications, and to alter it and redistribute it
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  freely, subject to the following restrictions:
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  1. The origin of this software must not be misrepresented; you must not
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     claim that you wrote the original software. If you use this software
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     in a product, an acknowledgment in the product documentation would be
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     appreciated but is not required.
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  2. Altered source versions must be plainly marked as such, and must not be
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     misrepresented as being the original software.
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  3. This notice may not be removed or altered from any source distribution.
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*/
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#include "../../SDL_internal.h"
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#if SDL_VIDEO_DRIVER_X11
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#include "SDL.h"
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#include "SDL_x11video.h"
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#include "SDL_x11dyn.h"
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#include "SDL_assert.h"
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#include <locale.h>
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#define SDL_FORK_MESSAGEBOX 1
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#define SDL_SET_LOCALE      1
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#if SDL_FORK_MESSAGEBOX
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#include <sys/types.h>
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#include <sys/wait.h>
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#include <unistd.h>
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#include <errno.h>
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#endif
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#define MAX_BUTTONS             8       /* Maximum number of buttons supported */
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#define MAX_TEXT_LINES          32      /* Maximum number of text lines supported */
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#define MIN_BUTTON_WIDTH        64      /* Minimum button width */
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#define MIN_DIALOG_WIDTH        200     /* Minimum dialog width */
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#define MIN_DIALOG_HEIGHT       100     /* Minimum dialog height */
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static const char g_MessageBoxFontLatin1[] = "-*-*-medium-r-normal--0-120-*-*-p-0-iso8859-1";
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static const char g_MessageBoxFont[] = "-*-*-*-*-*-*-*-120-*-*-*-*-*-*";
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static const SDL_MessageBoxColor g_default_colors[ SDL_MESSAGEBOX_COLOR_MAX ] = {
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    { 56,  54,  53  }, /* SDL_MESSAGEBOX_COLOR_BACKGROUND, */
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    { 209, 207, 205 }, /* SDL_MESSAGEBOX_COLOR_TEXT, */
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    { 140, 135, 129 }, /* SDL_MESSAGEBOX_COLOR_BUTTON_BORDER, */
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    { 105, 102, 99  }, /* SDL_MESSAGEBOX_COLOR_BUTTON_BACKGROUND, */
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    { 205, 202, 53  }, /* SDL_MESSAGEBOX_COLOR_BUTTON_SELECTED, */
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};
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#define SDL_MAKE_RGB( _r, _g, _b )  ( ( ( Uint32 )( _r ) << 16 ) | \
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                                      ( ( Uint32 )( _g ) << 8 ) |  \
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                                      ( ( Uint32 )( _b ) ) )
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typedef struct SDL_MessageBoxButtonDataX11 {
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    int x, y;                           /* Text position */
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    int length;                         /* Text length */
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    int text_width;                     /* Text width */
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    SDL_Rect rect;                      /* Rectangle for entire button */
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    const SDL_MessageBoxButtonData *buttondata;   /* Button data from caller */
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} SDL_MessageBoxButtonDataX11;
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typedef struct TextLineData {
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    int width;                          /* Width of this text line */
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    int length;                         /* String length of this text line */
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    const char *text;                   /* Text for this line */
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} TextLineData;
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typedef struct SDL_MessageBoxDataX11
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{
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    Display *display;
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    int screen;
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    Window window;
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#if SDL_VIDEO_DRIVER_X11_XDBE
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    XdbeBackBuffer buf;
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    SDL_bool xdbe;                      /* Whether Xdbe is present or not */
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#endif
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    long event_mask;
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    Atom wm_protocols;
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    Atom wm_delete_message;
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    int dialog_width;                   /* Dialog box width. */
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    int dialog_height;                  /* Dialog box height. */
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    XFontSet font_set;                  /* for UTF-8 systems */
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    XFontStruct *font_struct;           /* Latin1 (ASCII) fallback. */
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    int xtext, ytext;                   /* Text position to start drawing at. */
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    int numlines;                       /* Count of Text lines. */
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    int text_height;                    /* Height for text lines. */
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    TextLineData linedata[ MAX_TEXT_LINES ];
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    int *pbuttonid;                     /* Pointer to user return buttonid value. */
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    int button_press_index;             /* Index into buttondata/buttonpos for button which is pressed (or -1). */
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    int mouse_over_index;               /* Index into buttondata/buttonpos for button mouse is over (or -1). */
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    int numbuttons;                     /* Count of buttons. */
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    const SDL_MessageBoxButtonData *buttondata;
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    SDL_MessageBoxButtonDataX11 buttonpos[ MAX_BUTTONS ];
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    Uint32 color[ SDL_MESSAGEBOX_COLOR_MAX ];
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    const SDL_MessageBoxData *messageboxdata;
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} SDL_MessageBoxDataX11;
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/* Maximum helper for ints. */
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static SDL_INLINE int
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IntMax( int a, int b )
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{
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    return ( a > b  ) ? a : b;
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}
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/* Return width and height for a string. */
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static void
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GetTextWidthHeight( SDL_MessageBoxDataX11 *data, const char *str, int nbytes, int *pwidth, int *pheight )
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{
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    if (SDL_X11_HAVE_UTF8) {
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        XRectangle overall_ink, overall_logical;
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        X11_Xutf8TextExtents(data->font_set, str, nbytes, &overall_ink, &overall_logical);
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        *pwidth = overall_logical.width;
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        *pheight = overall_logical.height;
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    } else {
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        XCharStruct text_structure;
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        int font_direction, font_ascent, font_descent;
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        X11_XTextExtents( data->font_struct, str, nbytes,
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                      &font_direction, &font_ascent, &font_descent,
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                      &text_structure );
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        *pwidth = text_structure.width;
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        *pheight = text_structure.ascent + text_structure.descent;
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    }
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}
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/* Return index of button if position x,y is contained therein. */
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static int
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GetHitButtonIndex( SDL_MessageBoxDataX11 *data, int x, int y )
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{
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    int i;
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    int numbuttons = data->numbuttons;
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    SDL_MessageBoxButtonDataX11 *buttonpos = data->buttonpos;
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    for ( i = 0; i < numbuttons; i++ ) {
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        SDL_Rect *rect = &buttonpos[ i ].rect;
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        if ( ( x >= rect->x ) &&
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             ( x <= ( rect->x + rect->w ) ) &&
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             ( y >= rect->y ) &&
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             ( y <= ( rect->y + rect->h ) ) ) {
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            return i;
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        }
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    }
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    return -1;
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}
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/* Initialize SDL_MessageBoxData structure and Display, etc. */
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static int
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X11_MessageBoxInit( SDL_MessageBoxDataX11 *data, const SDL_MessageBoxData * messageboxdata, int * pbuttonid )
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{
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    int i;
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    int numbuttons = messageboxdata->numbuttons;
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    const SDL_MessageBoxButtonData *buttondata = messageboxdata->buttons;
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    const SDL_MessageBoxColor *colorhints;
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    if ( numbuttons > MAX_BUTTONS ) {
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        return SDL_SetError("Too many buttons (%d max allowed)", MAX_BUTTONS);
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    }
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    data->dialog_width = MIN_DIALOG_WIDTH;
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    data->dialog_height = MIN_DIALOG_HEIGHT;
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    data->messageboxdata = messageboxdata;
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    data->buttondata = buttondata;
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    data->numbuttons = numbuttons;
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    data->pbuttonid = pbuttonid;
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    data->display = X11_XOpenDisplay( NULL );
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    if ( !data->display ) {
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        return SDL_SetError("Couldn't open X11 display");
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    }
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    if (SDL_X11_HAVE_UTF8) {
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        char **missing = NULL;
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        int num_missing = 0;
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        data->font_set = X11_XCreateFontSet(data->display, g_MessageBoxFont,
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                                        &missing, &num_missing, NULL);
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        if ( missing != NULL ) {
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            X11_XFreeStringList(missing);
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        }
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        if ( data->font_set == NULL ) {
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            return SDL_SetError("Couldn't load font %s", g_MessageBoxFont);
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        }
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    } else {
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        data->font_struct = X11_XLoadQueryFont( data->display, g_MessageBoxFontLatin1 );
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        if ( data->font_struct == NULL ) {
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            return SDL_SetError("Couldn't load font %s", g_MessageBoxFontLatin1);
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        }
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    }
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    if ( messageboxdata->colorScheme ) {
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        colorhints = messageboxdata->colorScheme->colors;
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    } else {
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        colorhints = g_default_colors;
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    }
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    /* Convert our SDL_MessageBoxColor r,g,b values to packed RGB format. */
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    for ( i = 0; i < SDL_MESSAGEBOX_COLOR_MAX; i++ ) {
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        data->color[ i ] = SDL_MAKE_RGB( colorhints[ i ].r, colorhints[ i ].g, colorhints[ i ].b );
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    }
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    return 0;
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}
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/* Calculate and initialize text and button locations. */
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static int
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X11_MessageBoxInitPositions( SDL_MessageBoxDataX11 *data )
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{
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    int i;
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    int ybuttons;
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    int text_width_max = 0;
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    int button_text_height = 0;
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    int button_width = MIN_BUTTON_WIDTH;
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    const SDL_MessageBoxData *messageboxdata = data->messageboxdata;
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    /* Go over text and break linefeeds into separate lines. */
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    if ( messageboxdata->message && messageboxdata->message[ 0 ] ) {
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        const char *text = messageboxdata->message;
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        TextLineData *plinedata = data->linedata;
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        for ( i = 0; i < MAX_TEXT_LINES; i++, plinedata++ ) {
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            int height;
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            char *lf = SDL_strchr( ( char * )text, '\n' );
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            data->numlines++;
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            /* Only grab length up to lf if it exists and isn't the last line. */
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            plinedata->length = ( lf && ( i < MAX_TEXT_LINES - 1 ) ) ? ( lf - text ) : SDL_strlen( text );
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            plinedata->text = text;
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            GetTextWidthHeight( data, text, plinedata->length, &plinedata->width, &height );
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            /* Text and widths are the largest we've ever seen. */
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            data->text_height = IntMax( data->text_height, height );
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            text_width_max = IntMax( text_width_max, plinedata->width );
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            if (lf && (lf > text) && (lf[-1] == '\r')) {
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                plinedata->length--;
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            }
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            text += plinedata->length + 1;
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            /* Break if there are no more linefeeds. */
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            if ( !lf )
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                break;
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        }
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        /* Bump up the text height slightly. */
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        data->text_height += 2;
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    }
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    /* Loop through all buttons and calculate the button widths and height. */
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    for ( i = 0; i < data->numbuttons; i++ ) {
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        int height;
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        data->buttonpos[ i ].buttondata = &data->buttondata[ i ];
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        data->buttonpos[ i ].length = SDL_strlen( data->buttondata[ i ].text );
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        GetTextWidthHeight( data, data->buttondata[ i ].text, SDL_strlen( data->buttondata[ i ].text ),
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                            &data->buttonpos[ i ].text_width, &height );
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        button_width = IntMax( button_width, data->buttonpos[ i ].text_width );
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        button_text_height = IntMax( button_text_height, height );
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    }
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    if ( data->numlines ) {
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        /* x,y for this line of text. */
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        data->xtext = data->text_height;
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        data->ytext = data->text_height + data->text_height;
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        /* Bump button y down to bottom of text. */
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        ybuttons = 3 * data->ytext / 2 + ( data->numlines - 1 ) * data->text_height;
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        /* Bump the dialog box width and height up if needed. */
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        data->dialog_width = IntMax( data->dialog_width, 2 * data->xtext + text_width_max );
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        data->dialog_height = IntMax( data->dialog_height, ybuttons );
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    } else {
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        /* Button y starts at height of button text. */
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        ybuttons = button_text_height;
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    }
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    if ( data->numbuttons ) {
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        int x, y;
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        int width_of_buttons;
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        int button_spacing = button_text_height;
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        int button_height = 2 * button_text_height;
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        /* Bump button width up a bit. */
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        button_width += button_text_height;
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        /* Get width of all buttons lined up. */
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        width_of_buttons = data->numbuttons * button_width + ( data->numbuttons - 1 ) * button_spacing;
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        /* Bump up dialog width and height if buttons are wider than text. */
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        data->dialog_width = IntMax( data->dialog_width, width_of_buttons + 2 * button_spacing );
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        data->dialog_height = IntMax( data->dialog_height, ybuttons + 2 * button_height );
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        /* Location for first button. */
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        x = ( data->dialog_width - width_of_buttons ) / 2;
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        y = ybuttons + ( data->dialog_height - ybuttons - button_height ) / 2;
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        for ( i = 0; i < data->numbuttons; i++ ) {
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            /* Button coordinates. */
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            data->buttonpos[ i ].rect.x = x;
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            data->buttonpos[ i ].rect.y = y;
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            data->buttonpos[ i ].rect.w = button_width;
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            data->buttonpos[ i ].rect.h = button_height;
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            /* Button text coordinates. */
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            data->buttonpos[ i ].x = x + ( button_width - data->buttonpos[ i ].text_width ) / 2;
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            data->buttonpos[ i ].y = y + ( button_height - button_text_height - 1 ) / 2 + button_text_height;
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            /* Scoot over for next button. */
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            x += button_width + button_spacing;
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        }
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    }
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    return 0;
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}
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/* Free SDL_MessageBoxData data. */
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   341
static void
slouken@6602
   342
X11_MessageBoxShutdown( SDL_MessageBoxDataX11 *data )
slouken@6602
   343
{
slouken@6725
   344
    if ( data->font_set != NULL ) {
icculus@7827
   345
        X11_XFreeFontSet( data->display, data->font_set );
icculus@6723
   346
        data->font_set = NULL;
icculus@6723
   347
    }
icculus@6723
   348
slouken@6725
   349
    if ( data->font_struct != NULL ) {
icculus@7827
   350
        X11_XFreeFont( data->display, data->font_struct );
icculus@6723
   351
        data->font_struct = NULL;
slouken@6602
   352
    }
slouken@6602
   353
icculus@9657
   354
#if SDL_VIDEO_DRIVER_X11_XDBE
icculus@9657
   355
    if ( SDL_X11_HAVE_XDBE && data->xdbe ) {
icculus@9657
   356
        X11_XdbeDeallocateBackBufferName(data->display, data->buf);
icculus@9657
   357
    }
icculus@9657
   358
#endif
icculus@9657
   359
slouken@6725
   360
    if ( data->display ) {
slouken@6725
   361
        if ( data->window != None ) {
icculus@7827
   362
            X11_XWithdrawWindow( data->display, data->window, data->screen );
icculus@7827
   363
            X11_XDestroyWindow( data->display, data->window );
slouken@6602
   364
            data->window = None;
slouken@6602
   365
        }
slouken@6602
   366
icculus@7827
   367
        X11_XCloseDisplay( data->display );
slouken@6602
   368
        data->display = NULL;
slouken@6602
   369
    }
slouken@6602
   370
}
slouken@6602
   371
slouken@6602
   372
/* Create and set up our X11 dialog box indow. */
slouken@6602
   373
static int
slouken@6602
   374
X11_MessageBoxCreateWindow( SDL_MessageBoxDataX11 *data )
slouken@6602
   375
{
slouken@6602
   376
    int x, y;
slouken@6602
   377
    XSizeHints *sizehints;
slouken@6602
   378
    XSetWindowAttributes wnd_attr;
icculus@9339
   379
    Atom _NET_WM_WINDOW_TYPE, _NET_WM_WINDOW_TYPE_DIALOG;
slouken@6602
   380
    Display *display = data->display;
slouken@6602
   381
    SDL_WindowData *windowdata = NULL;
slouken@6602
   382
    const SDL_MessageBoxData *messageboxdata = data->messageboxdata;
slouken@6602
   383
slouken@6602
   384
    if ( messageboxdata->window ) {
slouken@7522
   385
        SDL_DisplayData *displaydata =
slouken@7522
   386
            (SDL_DisplayData *) SDL_GetDisplayForWindow(messageboxdata->window)->driverdata;
slouken@6602
   387
        windowdata = (SDL_WindowData *)messageboxdata->window->driverdata;
slouken@7522
   388
        data->screen = displaydata->screen;
slouken@7522
   389
    } else {
slouken@7522
   390
        data->screen = DefaultScreen( display );
slouken@6602
   391
    }
slouken@6602
   392
slouken@6602
   393
    data->event_mask = ExposureMask |
slouken@6725
   394
                       ButtonPressMask | ButtonReleaseMask | KeyPressMask | KeyReleaseMask |
slouken@6725
   395
                       StructureNotifyMask | FocusChangeMask | PointerMotionMask;
slouken@6603
   396
    wnd_attr.event_mask = data->event_mask;
slouken@6602
   397
icculus@7827
   398
    data->window = X11_XCreateWindow(
slouken@7522
   399
                       display, RootWindow(display, data->screen),
slouken@6725
   400
                       0, 0,
slouken@6725
   401
                       data->dialog_width, data->dialog_height,
slouken@6725
   402
                       0, CopyFromParent, InputOutput, CopyFromParent,
slouken@6725
   403
                       CWEventMask, &wnd_attr );
slouken@6602
   404
    if ( data->window == None ) {
icculus@7037
   405
        return SDL_SetError("Couldn't create X window");
slouken@6602
   406
    }
slouken@6602
   407
slouken@6602
   408
    if ( windowdata ) {
slouken@6602
   409
        /* http://tronche.com/gui/x/icccm/sec-4.html#WM_TRANSIENT_FOR */
icculus@7827
   410
        X11_XSetTransientForHint( display, data->window, windowdata->xwindow );
slouken@6602
   411
    }
slouken@6602
   412
icculus@7827
   413
    X11_XStoreName( display, data->window, messageboxdata->title );
slouken@6602
   414
icculus@9339
   415
    /* Let the window manager know this is a dialog box */
icculus@9339
   416
    _NET_WM_WINDOW_TYPE = X11_XInternAtom(display, "_NET_WM_WINDOW_TYPE", False);
icculus@9339
   417
    _NET_WM_WINDOW_TYPE_DIALOG = X11_XInternAtom(display, "_NET_WM_WINDOW_TYPE_DIALOG", False);
icculus@9339
   418
    X11_XChangeProperty(display, data->window, _NET_WM_WINDOW_TYPE, XA_ATOM, 32,
icculus@9339
   419
                    PropModeReplace,
icculus@9339
   420
                    (unsigned char *)&_NET_WM_WINDOW_TYPE_DIALOG, 1);
icculus@9339
   421
slouken@6602
   422
    /* Allow the window to be deleted by the window manager */
icculus@7827
   423
    data->wm_protocols = X11_XInternAtom( display, "WM_PROTOCOLS", False );
icculus@7827
   424
    data->wm_delete_message = X11_XInternAtom( display, "WM_DELETE_WINDOW", False );
icculus@7827
   425
    X11_XSetWMProtocols( display, data->window, &data->wm_delete_message, 1 );
slouken@6602
   426
slouken@6602
   427
    if ( windowdata ) {
slouken@6602
   428
        XWindowAttributes attrib;
slouken@6602
   429
        Window dummy;
slouken@6602
   430
icculus@7827
   431
        X11_XGetWindowAttributes(display, windowdata->xwindow, &attrib);
slouken@6602
   432
        x = attrib.x + ( attrib.width - data->dialog_width ) / 2;
slouken@6602
   433
        y = attrib.y + ( attrib.height - data->dialog_height ) / 3 ;
icculus@7827
   434
        X11_XTranslateCoordinates(display, windowdata->xwindow, RootWindow(display, data->screen), x, y, &x, &y, &dummy);
slouken@6602
   435
    } else {
slouken@7522
   436
        x = ( DisplayWidth( display, data->screen ) - data->dialog_width ) / 2;
slouken@7522
   437
        y = ( DisplayHeight( display, data->screen ) - data->dialog_height ) / 3 ;
slouken@6602
   438
    }
icculus@7827
   439
    X11_XMoveWindow( display, data->window, x, y );
slouken@6602
   440
icculus@7827
   441
    sizehints = X11_XAllocSizeHints();
slouken@6602
   442
    if ( sizehints ) {
slouken@6602
   443
        sizehints->flags = USPosition | USSize | PMaxSize | PMinSize;
slouken@6602
   444
        sizehints->x = x;
slouken@6602
   445
        sizehints->y = y;
slouken@6602
   446
        sizehints->width = data->dialog_width;
slouken@6602
   447
        sizehints->height = data->dialog_height;
slouken@6602
   448
slouken@6602
   449
        sizehints->min_width = sizehints->max_width = data->dialog_width;
slouken@6602
   450
        sizehints->min_height = sizehints->max_height = data->dialog_height;
slouken@6602
   451
icculus@7827
   452
        X11_XSetWMNormalHints( display, data->window, sizehints );
slouken@6602
   453
icculus@7827
   454
        X11_XFree( sizehints );
slouken@6602
   455
    }
slouken@6602
   456
icculus@7827
   457
    X11_XMapRaised( display, data->window );
icculus@9657
   458
icculus@9657
   459
#if SDL_VIDEO_DRIVER_X11_XDBE
icculus@9657
   460
    /* Initialise a back buffer for double buffering */
icculus@9657
   461
    if (SDL_X11_HAVE_XDBE) {
icculus@9657
   462
        int xdbe_major, xdbe_minor;
icculus@9657
   463
        if (X11_XdbeQueryExtension(display, &xdbe_major, &xdbe_minor) != 0) {
icculus@9657
   464
            data->xdbe = SDL_TRUE;
icculus@9657
   465
            data->buf = X11_XdbeAllocateBackBufferName(display, data->window, XdbeUndefined);
icculus@9657
   466
        } else {
icculus@9657
   467
            data->xdbe = SDL_FALSE;
icculus@9657
   468
        }
icculus@9657
   469
    }
icculus@9657
   470
#endif
icculus@9657
   471
slouken@6602
   472
    return 0;
slouken@6602
   473
}
slouken@6602
   474
slouken@6602
   475
/* Draw our message box. */
slouken@6602
   476
static void
slouken@6602
   477
X11_MessageBoxDraw( SDL_MessageBoxDataX11 *data, GC ctx )
slouken@6602
   478
{
slouken@6602
   479
    int i;
icculus@9657
   480
    Drawable window = data->window;
slouken@6602
   481
    Display *display = data->display;
slouken@6602
   482
icculus@9657
   483
#if SDL_VIDEO_DRIVER_X11_XDBE
icculus@9657
   484
    if (SDL_X11_HAVE_XDBE && data->xdbe) {
icculus@9657
   485
        window = data->buf;
icculus@9657
   486
        X11_XdbeBeginIdiom(data->display);
icculus@9657
   487
    }
icculus@9657
   488
#endif
icculus@9657
   489
icculus@7827
   490
    X11_XSetForeground( display, ctx, data->color[ SDL_MESSAGEBOX_COLOR_BACKGROUND ] );
icculus@7827
   491
    X11_XFillRectangle( display, window, ctx, 0, 0, data->dialog_width, data->dialog_height );
slouken@6602
   492
icculus@7827
   493
    X11_XSetForeground( display, ctx, data->color[ SDL_MESSAGEBOX_COLOR_TEXT ] );
slouken@6725
   494
    for ( i = 0; i < data->numlines; i++ ) {
slouken@6602
   495
        TextLineData *plinedata = &data->linedata[ i ];
slouken@6602
   496
icculus@6723
   497
        if (SDL_X11_HAVE_UTF8) {
icculus@7827
   498
            X11_Xutf8DrawString( display, window, data->font_set, ctx,
icculus@6723
   499
                             data->xtext, data->ytext + i * data->text_height,
icculus@6723
   500
                             plinedata->text, plinedata->length );
icculus@6723
   501
        } else {
icculus@7827
   502
            X11_XDrawString( display, window, ctx,
icculus@6723
   503
                         data->xtext, data->ytext + i * data->text_height,
icculus@6723
   504
                         plinedata->text, plinedata->length );
icculus@6723
   505
        }
slouken@6602
   506
    }
slouken@6602
   507
slouken@6725
   508
    for ( i = 0; i < data->numbuttons; i++ ) {
slouken@6602
   509
        SDL_MessageBoxButtonDataX11 *buttondatax11 = &data->buttonpos[ i ];
slouken@6602
   510
        const SDL_MessageBoxButtonData *buttondata = buttondatax11->buttondata;
slouken@6602
   511
        int border = ( buttondata->flags & SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT ) ? 2 : 0;
slouken@6602
   512
        int offset = ( ( data->mouse_over_index == i ) && ( data->button_press_index == data->mouse_over_index ) ) ? 1 : 0;
slouken@6602
   513
icculus@7827
   514
        X11_XSetForeground( display, ctx, data->color[ SDL_MESSAGEBOX_COLOR_BUTTON_BACKGROUND ] );
icculus@7827
   515
        X11_XFillRectangle( display, window, ctx,
slouken@6602
   516
                        buttondatax11->rect.x - border, buttondatax11->rect.y - border,
slouken@6602
   517
                        buttondatax11->rect.w + 2 * border, buttondatax11->rect.h + 2 * border );
slouken@6602
   518
icculus@7827
   519
        X11_XSetForeground( display, ctx, data->color[ SDL_MESSAGEBOX_COLOR_BUTTON_BORDER ] );
icculus@7827
   520
        X11_XDrawRectangle( display, window, ctx,
slouken@6602
   521
                        buttondatax11->rect.x, buttondatax11->rect.y,
slouken@6602
   522
                        buttondatax11->rect.w, buttondatax11->rect.h );
slouken@6602
   523
icculus@7827
   524
        X11_XSetForeground( display, ctx, ( data->mouse_over_index == i ) ?
slouken@6602
   525
                        data->color[ SDL_MESSAGEBOX_COLOR_BUTTON_SELECTED ] :
slouken@6603
   526
                        data->color[ SDL_MESSAGEBOX_COLOR_TEXT ] );
icculus@6723
   527
icculus@6723
   528
        if (SDL_X11_HAVE_UTF8) {
icculus@7827
   529
            X11_Xutf8DrawString( display, window, data->font_set, ctx,
icculus@6723
   530
                             buttondatax11->x + offset,
icculus@6723
   531
                             buttondatax11->y + offset,
icculus@6723
   532
                             buttondata->text, buttondatax11->length );
icculus@6723
   533
        } else {
icculus@7827
   534
            X11_XDrawString( display, window, ctx,
icculus@6723
   535
                         buttondatax11->x + offset, buttondatax11->y + offset,
icculus@6723
   536
                         buttondata->text, buttondatax11->length );
icculus@6723
   537
        }
slouken@6602
   538
    }
icculus@9657
   539
icculus@9657
   540
#if SDL_VIDEO_DRIVER_X11_XDBE
icculus@9657
   541
    if (SDL_X11_HAVE_XDBE && data->xdbe) {
icculus@9657
   542
        XdbeSwapInfo swap_info;
icculus@9657
   543
        swap_info.swap_window = data->window;
icculus@9657
   544
        swap_info.swap_action = XdbeUndefined;
icculus@9657
   545
        X11_XdbeSwapBuffers(data->display, &swap_info, 1);
icculus@9657
   546
        X11_XdbeEndIdiom(data->display);
icculus@9657
   547
    }
icculus@9657
   548
#endif
slouken@6602
   549
}
slouken@6602
   550
slouken@6602
   551
/* Loop and handle message box event messages until something kills it. */
slouken@6602
   552
static int
slouken@6602
   553
X11_MessageBoxLoop( SDL_MessageBoxDataX11 *data )
slouken@6602
   554
{
slouken@6602
   555
    GC ctx;
slouken@6602
   556
    XGCValues ctx_vals;
slouken@6602
   557
    SDL_bool close_dialog = SDL_FALSE;
slouken@6602
   558
    SDL_bool has_focus = SDL_TRUE;
slouken@6602
   559
    KeySym last_key_pressed = XK_VoidSymbol;
icculus@6723
   560
    unsigned long gcflags = GCForeground | GCBackground;
slouken@6602
   561
icculus@6723
   562
    SDL_zero(ctx_vals);
slouken@6602
   563
    ctx_vals.foreground = data->color[ SDL_MESSAGEBOX_COLOR_BACKGROUND ];
slouken@6602
   564
    ctx_vals.background = data->color[ SDL_MESSAGEBOX_COLOR_BACKGROUND ];
slouken@6602
   565
icculus@6723
   566
    if (!SDL_X11_HAVE_UTF8) {
icculus@6723
   567
        gcflags |= GCFont;
icculus@6723
   568
        ctx_vals.font = data->font_struct->fid;
icculus@6723
   569
    }
icculus@6723
   570
icculus@7827
   571
    ctx = X11_XCreateGC( data->display, data->window, gcflags, &ctx_vals );
slouken@6602
   572
    if ( ctx == None ) {
icculus@7037
   573
        return SDL_SetError("Couldn't create graphics context");
slouken@6602
   574
    }
slouken@6602
   575
slouken@6602
   576
    data->button_press_index = -1;  /* Reset what button is currently depressed. */
slouken@6602
   577
    data->mouse_over_index = -1;    /* Reset what button the mouse is over. */
slouken@6602
   578
slouken@6602
   579
    while( !close_dialog ) {
slouken@6602
   580
        XEvent e;
slouken@6602
   581
        SDL_bool draw = SDL_TRUE;
slouken@6602
   582
icculus@7827
   583
        X11_XWindowEvent( data->display, data->window, data->event_mask, &e );
slouken@6602
   584
icculus@7827
   585
        /* If X11_XFilterEvent returns True, then some input method has filtered the
slouken@6602
   586
           event, and the client should discard the event. */
icculus@7827
   587
        if ( ( e.type != Expose ) && X11_XFilterEvent( &e, None ) )
slouken@6602
   588
            continue;
slouken@6602
   589
slouken@6602
   590
        switch( e.type ) {
slouken@6602
   591
        case Expose:
slouken@6602
   592
            if ( e.xexpose.count > 0 ) {
slouken@6602
   593
                draw = SDL_FALSE;
slouken@6602
   594
            }
slouken@6602
   595
            break;
slouken@6602
   596
slouken@6602
   597
        case FocusIn:
slouken@6602
   598
            /* Got focus. */
slouken@6602
   599
            has_focus = SDL_TRUE;
slouken@6602
   600
            break;
slouken@6602
   601
slouken@6602
   602
        case FocusOut:
slouken@6602
   603
            /* lost focus. Reset button and mouse info. */
slouken@6602
   604
            has_focus = SDL_FALSE;
slouken@6602
   605
            data->button_press_index = -1;
slouken@6602
   606
            data->mouse_over_index = -1;
slouken@6602
   607
            break;
slouken@6602
   608
slouken@6602
   609
        case MotionNotify:
slouken@6602
   610
            if ( has_focus ) {
slouken@6602
   611
                /* Mouse moved... */
icculus@9657
   612
                const int previndex = data->mouse_over_index;
slouken@6602
   613
                data->mouse_over_index = GetHitButtonIndex( data, e.xbutton.x, e.xbutton.y );
jorgen@8132
   614
                if (data->mouse_over_index == previndex) {
jorgen@8132
   615
                    draw = SDL_FALSE;
jorgen@8132
   616
                }
slouken@6602
   617
            }
slouken@6602
   618
            break;
slouken@6602
   619
slouken@6602
   620
        case ClientMessage:
slouken@6602
   621
            if ( e.xclient.message_type == data->wm_protocols &&
slouken@6602
   622
                 e.xclient.format == 32 &&
slouken@6602
   623
                 e.xclient.data.l[ 0 ] == data->wm_delete_message ) {
slouken@6602
   624
                close_dialog = SDL_TRUE;
slouken@6602
   625
            }
slouken@6602
   626
            break;
slouken@6602
   627
slouken@6602
   628
        case KeyPress:
slouken@6602
   629
            /* Store key press - we make sure in key release that we got both. */
icculus@7827
   630
            last_key_pressed = X11_XLookupKeysym( &e.xkey, 0 );
slouken@6602
   631
            break;
slouken@6602
   632
slouken@6725
   633
        case KeyRelease: {
slouken@6602
   634
            Uint32 mask = 0;
icculus@7827
   635
            KeySym key = X11_XLookupKeysym( &e.xkey, 0 );
slouken@6602
   636
slouken@6602
   637
            /* If this is a key release for something we didn't get the key down for, then bail. */
slouken@6602
   638
            if ( key != last_key_pressed )
slouken@6602
   639
                break;
slouken@6602
   640
slouken@6602
   641
            if ( key == XK_Escape )
slouken@6602
   642
                mask = SDL_MESSAGEBOX_BUTTON_ESCAPEKEY_DEFAULT;
slouken@6602
   643
            else if ( ( key == XK_Return ) || ( key == XK_KP_Enter ) )
slouken@6602
   644
                mask = SDL_MESSAGEBOX_BUTTON_RETURNKEY_DEFAULT;
slouken@6602
   645
slouken@6602
   646
            if ( mask ) {
slouken@6602
   647
                int i;
slouken@6602
   648
slouken@6602
   649
                /* Look for first button with this mask set, and return it if found. */
slouken@6602
   650
                for ( i = 0; i < data->numbuttons; i++ ) {
slouken@6602
   651
                    SDL_MessageBoxButtonDataX11 *buttondatax11 = &data->buttonpos[ i ];
slouken@6602
   652
slouken@6602
   653
                    if ( buttondatax11->buttondata->flags & mask ) {
slouken@6602
   654
                        *data->pbuttonid = buttondatax11->buttondata->buttonid;
slouken@6602
   655
                        close_dialog = SDL_TRUE;
slouken@6602
   656
                        break;
slouken@6602
   657
                    }
slouken@6602
   658
                }
slouken@6602
   659
            }
slouken@6602
   660
            break;
slouken@6602
   661
        }
slouken@6602
   662
slouken@6602
   663
        case ButtonPress:
slouken@6602
   664
            data->button_press_index = -1;
slouken@6602
   665
            if ( e.xbutton.button == Button1 ) {
slouken@6602
   666
                /* Find index of button they clicked on. */
slouken@6602
   667
                data->button_press_index = GetHitButtonIndex( data, e.xbutton.x, e.xbutton.y );
slouken@6602
   668
            }
slouken@6602
   669
            break;
slouken@6602
   670
slouken@6602
   671
        case ButtonRelease:
slouken@6602
   672
            /* If button is released over the same button that was clicked down on, then return it. */
slouken@6602
   673
            if ( ( e.xbutton.button == Button1 ) && ( data->button_press_index >= 0 ) ) {
slouken@6602
   674
                int button = GetHitButtonIndex( data, e.xbutton.x, e.xbutton.y );
slouken@6602
   675
slouken@6602
   676
                if ( data->button_press_index == button ) {
slouken@6602
   677
                    SDL_MessageBoxButtonDataX11 *buttondatax11 = &data->buttonpos[ button ];
slouken@6602
   678
slouken@6602
   679
                    *data->pbuttonid = buttondatax11->buttondata->buttonid;
slouken@6602
   680
                    close_dialog = SDL_TRUE;
slouken@6602
   681
                }
slouken@6602
   682
            }
slouken@6602
   683
            data->button_press_index = -1;
slouken@6602
   684
            break;
slouken@6602
   685
        }
slouken@6602
   686
slouken@6602
   687
        if ( draw ) {
slouken@6602
   688
            /* Draw our dialog box. */
slouken@6602
   689
            X11_MessageBoxDraw( data, ctx );
slouken@6602
   690
        }
slouken@6602
   691
    }
slouken@6602
   692
icculus@7827
   693
    X11_XFreeGC( data->display, ctx );
slouken@6602
   694
    return 0;
slouken@6602
   695
}
slouken@6602
   696
icculus@6726
   697
static int
icculus@6726
   698
X11_ShowMessageBoxImpl(const SDL_MessageBoxData *messageboxdata, int *buttonid)
slouken@6602
   699
{
slouken@6602
   700
    int ret;
slouken@6602
   701
    SDL_MessageBoxDataX11 data;
mikesart@6835
   702
#if SDL_SET_LOCALE
icculus@6724
   703
    char *origlocale;
mikesart@6835
   704
#endif
slouken@6602
   705
icculus@6723
   706
    SDL_zero(data);
icculus@6723
   707
slouken@6602
   708
    if ( !SDL_X11_LoadSymbols() )
slouken@6602
   709
        return -1;
slouken@6602
   710
mikesart@6835
   711
#if SDL_SET_LOCALE
icculus@6724
   712
    origlocale = setlocale(LC_ALL, NULL);
icculus@6724
   713
    if (origlocale != NULL) {
icculus@6724
   714
        origlocale = SDL_strdup(origlocale);
icculus@6724
   715
        if (origlocale == NULL) {
icculus@7037
   716
            return SDL_OutOfMemory();
icculus@6724
   717
        }
icculus@6724
   718
        setlocale(LC_ALL, "");
icculus@6724
   719
    }
mikesart@6835
   720
#endif
icculus@6724
   721
slouken@6602
   722
    /* This code could get called from multiple threads maybe? */
icculus@7827
   723
    X11_XInitThreads();
slouken@6602
   724
slouken@6602
   725
    /* Initialize the return buttonid value to -1 (for error or dialogbox closed). */
slouken@6602
   726
    *buttonid = -1;
slouken@6602
   727
slouken@6602
   728
    /* Init and display the message box. */
slouken@6602
   729
    ret = X11_MessageBoxInit( &data, messageboxdata, buttonid );
slouken@6602
   730
    if ( ret != -1 ) {
slouken@6602
   731
        ret = X11_MessageBoxInitPositions( &data );
slouken@6602
   732
        if ( ret != -1 ) {
slouken@6602
   733
            ret = X11_MessageBoxCreateWindow( &data );
slouken@6602
   734
            if ( ret != -1 ) {
slouken@6602
   735
                ret = X11_MessageBoxLoop( &data );
slouken@6602
   736
            }
slouken@6602
   737
        }
slouken@6602
   738
    }
slouken@6602
   739
slouken@6602
   740
    X11_MessageBoxShutdown( &data );
icculus@6724
   741
mikesart@6835
   742
#if SDL_SET_LOCALE
icculus@6724
   743
    if (origlocale) {
icculus@6724
   744
        setlocale(LC_ALL, origlocale);
icculus@6724
   745
        SDL_free(origlocale);
icculus@6724
   746
    }
mikesart@6835
   747
#endif
icculus@6724
   748
slouken@6602
   749
    return ret;
slouken@6602
   750
}
slouken@6602
   751
icculus@6726
   752
/* Display an x11 message box. */
icculus@6726
   753
int
icculus@6726
   754
X11_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
icculus@6726
   755
{
icculus@6726
   756
#if SDL_FORK_MESSAGEBOX
icculus@6726
   757
    /* Use a child process to protect against setlocale(). Annoying. */
icculus@6726
   758
    pid_t pid;
icculus@6726
   759
    int fds[2];
icculus@6726
   760
    int status = 0;
icculus@6726
   761
icculus@6726
   762
    if (pipe(fds) == -1) {
icculus@6726
   763
        return X11_ShowMessageBoxImpl(messageboxdata, buttonid); /* oh well. */
icculus@6726
   764
    }
icculus@6726
   765
icculus@6726
   766
    pid = fork();
icculus@6726
   767
    if (pid == -1) {  /* failed */
icculus@6726
   768
        close(fds[0]);
icculus@6726
   769
        close(fds[1]);
icculus@6726
   770
        return X11_ShowMessageBoxImpl(messageboxdata, buttonid); /* oh well. */
icculus@6726
   771
    } else if (pid == 0) {  /* we're the child */
icculus@6726
   772
        int exitcode = 0;
icculus@6726
   773
        close(fds[0]);
icculus@6726
   774
        status = X11_ShowMessageBoxImpl(messageboxdata, buttonid);
icculus@6726
   775
        if (write(fds[1], &status, sizeof (int)) != sizeof (int))
icculus@6726
   776
            exitcode = 1;
icculus@6726
   777
        else if (write(fds[1], buttonid, sizeof (int)) != sizeof (int))
icculus@6726
   778
            exitcode = 1;
icculus@6726
   779
        close(fds[1]);
icculus@6726
   780
        _exit(exitcode);  /* don't run atexit() stuff, static destructors, etc. */
icculus@6726
   781
    } else {  /* we're the parent */
icculus@6726
   782
        pid_t rc;
icculus@6726
   783
        close(fds[1]);
icculus@6726
   784
        do {
icculus@6726
   785
            rc = waitpid(pid, &status, 0);
icculus@6726
   786
        } while ((rc == -1) && (errno == EINTR));
icculus@6726
   787
icculus@6726
   788
        SDL_assert(rc == pid);  /* not sure what to do if this fails. */
icculus@6726
   789
icculus@6726
   790
        if ((rc == -1) || (!WIFEXITED(status)) || (WEXITSTATUS(status) != 0)) {
icculus@7037
   791
            return SDL_SetError("msgbox child process failed");
icculus@6726
   792
        }
icculus@6726
   793
icculus@6726
   794
        if (read(fds[0], &status, sizeof (int)) != sizeof (int))
icculus@6726
   795
            status = -1;
icculus@6726
   796
        else if (read(fds[0], buttonid, sizeof (int)) != sizeof (int))
icculus@6726
   797
            status = -1;
icculus@6726
   798
        close(fds[0]);
icculus@6726
   799
icculus@6726
   800
        return status;
icculus@6726
   801
    }
icculus@6726
   802
#else
icculus@6726
   803
    return X11_ShowMessageBoxImpl(messageboxdata, buttonid);
icculus@6726
   804
#endif
icculus@6726
   805
}
slouken@6602
   806
#endif /* SDL_VIDEO_DRIVER_X11 */
slouken@6602
   807
slouken@6602
   808
/* vi: set ts=4 sw=4 expandtab: */