1/*
2 Simple DirectMedia Layer
3 Copyright (C) 1997-2021 Sam Lantinga <slouken@libsdl.org>
4
5 This software is provided 'as-is', without any express or implied
6 warranty. In no event will the authors be held liable for any damages
7 arising from the use of this software.
8
9 Permission is granted to anyone to use this software for any purpose,
10 including commercial applications, and to alter it and redistribute it
11 freely, subject to the following restrictions:
12
13 1. The origin of this software must not be misrepresented; you must not
14 claim that you wrote the original software. If you use this software
15 in a product, an acknowledgment in the product documentation would be
16 appreciated but is not required.
17 2. Altered source versions must be plainly marked as such, and must not be
18 misrepresented as being the original software.
19 3. This notice may not be removed or altered from any source distribution.
20*/
21
22#include "../../SDL_internal.h"
23
24#if SDL_VIDEO_DRIVER_WAYLAND
25
26#include "SDL.h"
27#include <stdlib.h> /* popen/pclose/fgets */
28
29int
30Wayland_ShowMessageBox(const SDL_MessageBoxData *messageboxdata, int *buttonid)
31{
32 #define ZENITY_CONST(name, str) \
33 const char *name = str; \
34 const size_t name##_len = SDL_strlen(name);
35 ZENITY_CONST(zenity, "zenity --question --switch --no-wrap --icon-name=dialog-")
36 ZENITY_CONST(title, "--title=")
37 ZENITY_CONST(message, "--text=")
38 ZENITY_CONST(extrabutton, "--extra-button=")
39 ZENITY_CONST(icon_info, "information")
40 ZENITY_CONST(icon_warn, "warning")
41 ZENITY_CONST(icon_error, "error")
42 #undef ZENITY_CONST
43
44 char *command, *output;
45 size_t command_len, output_len;
46 const char *icon;
47 char *tmp;
48 FILE *process;
49 int i;
50
51 /* Start by calculating the lengths of the strings. These commands can get
52 * pretty long, so we need to dynamically allocate this.
53 */
54 command_len = zenity_len;
55 output_len = 0;
56 switch (messageboxdata->flags)
57 {
58 case SDL_MESSAGEBOX_ERROR:
59 icon = icon_error;
60 command_len += icon_error_len;
61 break;
62 case SDL_MESSAGEBOX_WARNING:
63 icon = icon_warn;
64 command_len += icon_warn_len;
65 break;
66 case SDL_MESSAGEBOX_INFORMATION:
67 default:
68 icon = icon_info;
69 command_len += icon_info_len;
70 break;
71 }
72 #define ADD_ARGUMENT(arg, value) \
73 command_len += arg + 3; /* Two " and a space */ \
74 if (messageboxdata->value != NULL) { \
75 command_len += SDL_strlen(messageboxdata->value); \
76 }
77 ADD_ARGUMENT(title_len, title)
78 ADD_ARGUMENT(message_len, message)
79 #undef ADD_ARGUMENT
80 for (i = 0; i < messageboxdata->numbuttons; i += 1) {
81 command_len += extrabutton_len + 3; /* Two " and a space */
82 if (messageboxdata->buttons[i].text != NULL) {
83 const size_t button_len = SDL_strlen(messageboxdata->buttons[i].text);
84 command_len += button_len;
85 if (button_len > output_len) {
86 output_len = button_len;
87 }
88 }
89 }
90
91 /* Don't forget null terminators! */
92 command_len += 1;
93 output_len += 1;
94
95 /* Now that we know the length of the command, allocate! */
96 command = (char*) SDL_malloc(command_len + output_len);
97 if (command == NULL) {
98 return SDL_OutOfMemory();
99 }
100 output = command + command_len;
101 command[0] = '\0';
102 output[0] = '\0';
103
104 /* Now we can build the command... */
105 SDL_strlcpy(command, zenity, command_len);
106 SDL_strlcat(command, icon, command_len);
107 #define ADD_ARGUMENT(arg, value) \
108 SDL_strlcat(command, " ", command_len); \
109 SDL_strlcat(command, arg, command_len); \
110 SDL_strlcat(command, "\"", command_len); \
111 if (value != NULL) { \
112 SDL_strlcat(command, value, command_len); \
113 } \
114 SDL_strlcat(command, "\"", command_len)
115 ADD_ARGUMENT(title, messageboxdata->title);
116 ADD_ARGUMENT(message, messageboxdata->message);
117 for (i = 0; i < messageboxdata->numbuttons; i += 1) {
118 ADD_ARGUMENT(extrabutton, messageboxdata->buttons[i].text);
119 }
120 #undef ADD_ARGUMENT
121
122 /* ... then run it, finally. */
123 process = popen(command, "r");
124 if (process == NULL) {
125 SDL_free(command);
126 return SDL_SetError("zenity failed to run");
127 }
128
129 /* At this point, if no button ID is needed, we can just bail as soon as the
130 * process has completed.
131 */
132 if (buttonid == NULL) {
133 pclose(process);
134 goto end;
135 }
136 *buttonid = -1;
137
138 /* Read the result from stdout */
139 tmp = fgets(output, output_len, process);
140 pclose(process);
141 if ((tmp == NULL) || (*tmp == '\0') || (*tmp == '\n')) {
142 goto end; /* User simply closed the dialog */
143 }
144
145 /* It likes to add a newline... */
146 tmp = SDL_strrchr(output, '\n');
147 if (tmp != NULL) {
148 *tmp = '\0';
149 }
150
151 /* Check which button got pressed */
152 for (i = 0; i < messageboxdata->numbuttons; i += 1) {
153 if (messageboxdata->buttons[i].text != NULL) {
154 if (SDL_strcmp(output, messageboxdata->buttons[i].text) == 0) {
155 *buttonid = i;
156 break;
157 }
158 }
159 }
160
161end:
162 SDL_free(command);
163 return 0;
164}
165
166#endif /* SDL_VIDEO_DRIVER_WAYLAND */
167
168/* vi: set ts=4 sw=4 expandtab: */
169