ref: 8b8c8bf3d131445ae13cdfacdb7bb393561da0c4
dir: /textscreen/txt_fileselect.c/
//
// Copyright(C) 2005-2014 Simon Howard
//
// This program is free software; you can redistribute it and/or
// modify it under the terms of the GNU General Public License
// as published by the Free Software Foundation; either version 2
// of the License, or (at your option) any later version.
//
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
//
//
// Routines for selecting files.
//
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "doomkeys.h"
#include "txt_fileselect.h"
#include "txt_inputbox.h"
#include "txt_gui.h"
#include "txt_io.h"
#include "txt_main.h"
#include "txt_widget.h"
struct txt_fileselect_s {
txt_widget_t widget;
txt_inputbox_t *inputbox;
int size;
const char *prompt;
const char **extensions;
};
// Dummy value to select a directory.
const char *TXT_DIRECTORY[] = { "__directory__", NULL };
#ifndef _WIN32
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <sys/wait.h>
static char *ExecReadOutput(char **argv)
{
char *result;
int completed;
int pid, status, result_len;
int pipefd[2];
if (pipe(pipefd) != 0)
{
return NULL;
}
pid = fork();
if (pid == 0)
{
dup2(pipefd[1], fileno(stdout));
execv(argv[0], argv);
exit(-1);
}
fcntl(pipefd[0], F_SETFL, O_NONBLOCK);
// Read program output into 'result' string.
// Wait until the program has completed and (if it was successful)
// a full line has been read.
result = NULL;
result_len = 0;
completed = 0;
while (!completed
|| (status == 0 && (result == NULL || strchr(result, '\n') == NULL)))
{
char buf[64];
int bytes;
if (!completed && waitpid(pid, &status, WNOHANG) != 0)
{
completed = 1;
}
bytes = read(pipefd[0], buf, sizeof(buf));
if (bytes < 0)
{
if (errno != EAGAIN && errno != EWOULDBLOCK)
{
status = -1;
break;
}
}
else
{
char *new_result = realloc(result, result_len + bytes + 1);
if (new_result == NULL)
{
break;
}
result = new_result;
memcpy(result + result_len, buf, bytes);
result_len += bytes;
result[result_len] = '\0';
}
usleep(100 * 1000);
TXT_Sleep(1);
TXT_UpdateScreen();
}
close(pipefd[0]);
close(pipefd[1]);
// Must have a success exit code.
if (WEXITSTATUS(status) != 0)
{
free(result);
result = NULL;
}
// Strip off newline from the end.
if (result != NULL && result[result_len - 1] == '\n')
{
result[result_len - 1] = '\0';
}
return result;
}
#endif
// This is currently disabled on Windows because it doesn't work.
// Current issues:
// * On Windows Vista+ the mouse cursor freezes when the dialog is
// opened. This is probably some conflict with SDL (might be
// resolved by opening the dialog in a separate thread so that
// TXT_UpdateScreen can be run in the background).
// * On Windows XP the program exits/crashes when the dialog is
// closed.
#if defined(_WIN32)
int TXT_CanSelectFiles(void)
{
return 0;
}
char *TXT_SelectFile(const char *window_title, const char **extensions)
{
return NULL;
}
#elif defined(xxxdisabled_WIN32)
// Windows code. Use comdlg32 to pop up a dialog box.
#include <windows.h>
#include <shlobj.h>
static BOOL (*MyGetOpenFileName)(LPOPENFILENAME) = NULL;
static LPITEMIDLIST (*MySHBrowseForFolder)(LPBROWSEINFO) = NULL;
static BOOL (*MySHGetPathFromIDList)(LPITEMIDLIST, LPTSTR) = NULL;
// Load library functions from DLL files.
static int LoadDLLs(void)
{
HMODULE comdlg32 = LoadLibraryW(L"comdlg32.dll");
HMODULE shell32 = LoadLibraryW(L"shell32.dll");
if (comdlg32 == NULL || shell32 == NULL)
{
return 0;
}
MyGetOpenFileName =
(void *) GetProcAddress(comdlg32, "GetOpenFileNameA");
MySHBrowseForFolder =
(void *) GetProcAddress(shell32, "SHBrowseForFolder");
MySHGetPathFromIDList =
(void *) GetProcAddress(shell32, "SHGetPathFromIDList");
return MyGetOpenFileName != NULL
&& MySHBrowseForFolder != NULL
&& MySHGetPathFromIDList != NULL;
}
static int InitLibraries(void)
{
static int initted = 0, success = 0;
if (!initted)
{
success = LoadDLLs();
initted = 1;
}
return success;
}
// Generate the "filter" string from the list of extensions.
static char *GenerateFilterString(const char **extensions)
{
unsigned int result_len = 1;
unsigned int i;
char *result, *out;
size_t out_len, offset;
if (extensions == NULL)
{
return NULL;
}
for (i = 0; extensions[i] != NULL; ++i)
{
result_len += 16 + strlen(extensions[i]) * 3;
}
result = malloc(result_len);
out = result; out_len = result_len;
for (i = 0; extensions[i] != NULL; ++i)
{
// .wad files (*.wad)\0
offset = TXT_snprintf(out, out_len, "%s files (*.%s)",
extensions[i], extensions[i]);
out += offset + 1; out_len -= offset + 1;
// *.wad\0
offset = TXT_snprintf(out, out_len, "*.%s", extensions[i]);
out_len += offset + 1; out_len -= offset + 1;
}
*out = '\0';
return result;
}
int TXT_CanSelectFiles(void)
{
return InitLibraries();
}
static char *SelectDirectory(char *window_title)
{
LPITEMIDLIST pidl;
BROWSEINFO bi;
char selected[MAX_PATH] = "";
char *result;
ZeroMemory(&bi, sizeof(bi));
bi.hwndOwner = NULL;
bi.lpszTitle = window_title;
bi.pszDisplayName = selected;
bi.ulFlags = BIF_RETURNONLYFSDIRS | BIF_NEWDIALOGSTYLE;
pidl = MySHBrowseForFolder(&bi);
result = NULL;
if (pidl != NULL)
{
if (MySHGetPathFromIDList(pidl, selected))
{
result = strdup(selected);
}
// TODO: Free pidl
}
return result;
}
char *TXT_SelectFile(const char *window_title, const char **extensions)
{
OPENFILENAME fm;
char selected[MAX_PATH] = "";
char *filter_string, *result;
if (!InitLibraries())
{
return NULL;
}
if (extensions == TXT_DIRECTORY)
{
return SelectDirectory(window_title);
}
filter_string = GenerateFilterString(extensions);
ZeroMemory(&fm, sizeof(fm));
fm.lStructSize = sizeof(OPENFILENAME);
fm.hwndOwner = NULL;
fm.lpstrTitle = window_title;
fm.lpstrFilter = filter_string;
fm.lpstrFile = selected;
fm.nMaxFile = MAX_PATH;
fm.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY;
fm.lpstrDefExt = "";
if (!MyGetOpenFileName(&fm))
{
result = NULL;
}
else
{
result = strdup(selected);
}
free(filter_string);
return result;
}
#elif defined(__MACOSX__)
// Mac OS X code. Popping up a dialog requires Objective C/Cocoa
// but we can get away with using AppleScript which avoids adding
// an Objective C dependency. This is rather silly.
// Printf format string for the "wrapper" portion of the AppleScript:
#define APPLESCRIPT_WRAPPER "copy POSIX path of (%s) to stdout"
static char *CreateEscapedString(const char *original)
{
char *result;
const char *in;
char *out;
// We need to take care not to overflow the buffer, so count exactly.
#define ESCAPED_CHARS "\"\\"
size_t count_extras = 2; // start counting the two quotes
for (in = original; *in; ++in)
{
if (strchr(ESCAPED_CHARS, *in))
{
++count_extras;
}
}
result = malloc(strlen(original) + count_extras + 1);
if (!result)
{
return NULL;
}
out = result;
*out++ = '"';
for (in = original; *in; ++in)
{
if (strchr(ESCAPED_CHARS, *in))
{
*out++ = '\\';
}
*out++ = *in;
}
*out++ = '"';
*out = 0;
return result;
#undef ESCAPED_CHARS
}
// Build list of extensions, like: {"wad","lmp","txt"}
static char *CreateExtensionsList(const char **extensions)
{
char *result, *escaped;
unsigned int result_len;
unsigned int i;
if (extensions == NULL)
{
return NULL;
}
result_len = 3;
for (i = 0; extensions[i] != NULL; ++i)
{
result_len += 5 + strlen(extensions[i]) * 2;
}
result = malloc(result_len);
if (!result)
{
return NULL;
}
TXT_StringCopy(result, "{", result_len);
for (i = 0; extensions[i] != NULL; ++i)
{
escaped = CreateEscapedString(extensions[i]);
if (!escaped)
{
free(result);
return NULL;
}
TXT_StringConcat(result, escaped, result_len);
free(escaped);
if (extensions[i + 1] != NULL)
{
TXT_StringConcat(result, ",", result_len);
}
}
TXT_StringConcat(result, "}", result_len);
return result;
}
static char *GenerateSelector(const char *const window_title, const char **extensions)
{
const char *chooser;
char *ext_list = NULL;
char *window_title_escaped = NULL;
char *result = NULL;
unsigned int result_len = 64;
if (extensions == TXT_DIRECTORY)
{
chooser = "choose folder";
}
else
{
chooser = "choose file";
ext_list = CreateExtensionsList(extensions);
if (!ext_list)
{
return NULL;
}
}
// Calculate size.
if (window_title != NULL)
{
window_title_escaped = CreateEscapedString(window_title);
if (!window_title_escaped)
{
free(ext_list);
return NULL;
}
result_len += strlen(window_title_escaped);
}
if (ext_list != NULL)
{
result_len += strlen(ext_list);
}
result = malloc(result_len);
if (!result)
{
free(window_title_escaped);
free(ext_list);
return NULL;
}
TXT_StringCopy(result, chooser, result_len);
if (window_title_escaped != NULL)
{
TXT_StringConcat(result, " with prompt ", result_len);
TXT_StringConcat(result, window_title_escaped, result_len);
}
if (ext_list != NULL)
{
TXT_StringConcat(result, " of type ", result_len);
TXT_StringConcat(result, ext_list, result_len);
}
free(window_title_escaped);
free(ext_list);
return result;
}
static char *GenerateAppleScript(const char *window_title, const char **extensions)
{
char *selector, *result;
size_t result_len;
selector = GenerateSelector(window_title, extensions);
if (!selector)
{
return NULL;
}
result_len = strlen(APPLESCRIPT_WRAPPER) + strlen(selector);
result = malloc(result_len);
if (!result)
{
free(selector);
return NULL;
}
TXT_snprintf(result, result_len, APPLESCRIPT_WRAPPER, selector);
free(selector);
return result;
}
int TXT_CanSelectFiles(void)
{
return 1;
}
char *TXT_SelectFile(const char *window_title, const char **extensions)
{
char *argv[4];
char *result, *applescript;
applescript = GenerateAppleScript(window_title, extensions);
if (!applescript)
{
return NULL;
}
argv[0] = "/usr/bin/osascript";
argv[1] = "-e";
argv[2] = applescript;
argv[3] = NULL;
result = ExecReadOutput(argv);
free(applescript);
return result;
}
#else
// Linux version: invoke the Zenity command line program to pop up a
// dialog box. This avoids adding Gtk+ as a compile dependency.
#define ZENITY_BINARY "/usr/bin/zenity"
static unsigned int NumExtensions(const char **extensions)
{
unsigned int result = 0;
if (extensions != NULL)
{
for (result = 0; extensions[result] != NULL; ++result);
}
return result;
}
static int ZenityAvailable(void)
{
return system(ZENITY_BINARY " --help >/dev/null 2>&1") == 0;
}
int TXT_CanSelectFiles(void)
{
return ZenityAvailable();
}
//
// ExpandExtension
// given an extension (like wad)
// return a pointer to a string that is a case-insensitive
// pattern representation (like [Ww][Aa][Dd])
//
static char *ExpandExtension(const char *orig)
{
int oldlen, newlen, i;
char *c, *newext = NULL;
oldlen = strlen(orig);
newlen = oldlen * 4; // pathological case: 'w' => '[Ww]'
newext = malloc(newlen+1);
if (newext == NULL)
{
return NULL;
}
c = newext;
for (i = 0; i < oldlen; ++i)
{
if (isalpha(orig[i]))
{
*c++ = '[';
*c++ = tolower(orig[i]);
*c++ = toupper(orig[i]);
*c++ = ']';
}
else
{
*c++ = orig[i];
}
}
*c = '\0';
return newext;
}
char *TXT_SelectFile(const char *window_title, const char **extensions)
{
unsigned int i;
size_t len;
char *result;
char **argv;
int argc;
if (!ZenityAvailable())
{
return NULL;
}
argv = calloc(5 + NumExtensions(extensions), sizeof(char *));
argv[0] = strdup(ZENITY_BINARY);
argv[1] = strdup("--file-selection");
argc = 2;
if (window_title != NULL)
{
len = 10 + strlen(window_title);
argv[argc] = malloc(len);
TXT_snprintf(argv[argc], len, "--title=%s", window_title);
++argc;
}
if (extensions == TXT_DIRECTORY)
{
argv[argc] = strdup("--directory");
++argc;
}
else if (extensions != NULL)
{
for (i = 0; extensions[i] != NULL; ++i)
{
char * newext = ExpandExtension(extensions[i]);
if (newext)
{
len = 30 + strlen(extensions[i]) + strlen(newext);
argv[argc] = malloc(len);
TXT_snprintf(argv[argc], len, "--file-filter=.%s | *.%s",
extensions[i], newext);
++argc;
free(newext);
}
}
argv[argc] = strdup("--file-filter=*.* | *.*");
++argc;
}
argv[argc] = NULL;
result = ExecReadOutput(argv);
for (i = 0; i < argc; ++i)
{
free(argv[i]);
}
free(argv);
return result;
}
#endif
static void TXT_FileSelectSizeCalc(TXT_UNCAST_ARG(fileselect))
{
TXT_CAST_ARG(txt_fileselect_t, fileselect);
// Calculate widget size, but override the width to always
// be the configured size.
TXT_CalcWidgetSize(fileselect->inputbox);
fileselect->widget.w = fileselect->size;
fileselect->widget.h = fileselect->inputbox->widget.h;
}
static void TXT_FileSelectDrawer(TXT_UNCAST_ARG(fileselect))
{
TXT_CAST_ARG(txt_fileselect_t, fileselect);
// Input box widget inherits all the properties of the
// file selector.
fileselect->inputbox->widget.x = fileselect->widget.x + 2;
fileselect->inputbox->widget.y = fileselect->widget.y;
fileselect->inputbox->widget.w = fileselect->widget.w - 2;
fileselect->inputbox->widget.h = fileselect->widget.h;
// Triple bar symbol gives a distinguishing look to the file selector.
TXT_DrawCodePageString("\xf0 ");
TXT_BGColor(TXT_COLOR_BLACK, 0);
TXT_DrawWidget(fileselect->inputbox);
}
static void TXT_FileSelectDestructor(TXT_UNCAST_ARG(fileselect))
{
TXT_CAST_ARG(txt_fileselect_t, fileselect);
TXT_DestroyWidget(fileselect->inputbox);
}
static int DoSelectFile(txt_fileselect_t *fileselect)
{
char *path;
char **var;
if (TXT_CanSelectFiles())
{
path = TXT_SelectFile(fileselect->prompt,
fileselect->extensions);
// Update inputbox variable.
// If cancel was pressed (ie. NULL was returned by TXT_SelectFile)
// then reset to empty string, not NULL).
if (path == NULL)
{
path = strdup("");
}
var = fileselect->inputbox->value;
free(*var);
*var = path;
return 1;
}
return 0;
}
static int TXT_FileSelectKeyPress(TXT_UNCAST_ARG(fileselect), int key)
{
TXT_CAST_ARG(txt_fileselect_t, fileselect);
// When the enter key is pressed, pop up a file selection dialog,
// if file selectors work. Allow holding down 'alt' to override
// use of the native file selector, so the user can just type a path.
if (!fileselect->inputbox->editing
&& !TXT_GetModifierState(TXT_MOD_ALT)
&& key == KEY_ENTER)
{
if (DoSelectFile(fileselect))
{
return 1;
}
}
return TXT_WidgetKeyPress(fileselect->inputbox, key);
}
static void TXT_FileSelectMousePress(TXT_UNCAST_ARG(fileselect),
int x, int y, int b)
{
TXT_CAST_ARG(txt_fileselect_t, fileselect);
if (!fileselect->inputbox->editing
&& !TXT_GetModifierState(TXT_MOD_ALT)
&& b == TXT_MOUSE_LEFT)
{
if (DoSelectFile(fileselect))
{
return;
}
}
TXT_WidgetMousePress(fileselect->inputbox, x, y, b);
}
static void TXT_FileSelectFocused(TXT_UNCAST_ARG(fileselect), int focused)
{
TXT_CAST_ARG(txt_fileselect_t, fileselect);
TXT_SetWidgetFocus(fileselect->inputbox, focused);
}
txt_widget_class_t txt_fileselect_class =
{
TXT_AlwaysSelectable,
TXT_FileSelectSizeCalc,
TXT_FileSelectDrawer,
TXT_FileSelectKeyPress,
TXT_FileSelectDestructor,
TXT_FileSelectMousePress,
NULL,
TXT_FileSelectFocused,
};
// If the (inner) inputbox widget is changed, emit a change to the
// outer (fileselect) widget.
static void InputBoxChanged(TXT_UNCAST_ARG(widget), TXT_UNCAST_ARG(fileselect))
{
TXT_CAST_ARG(txt_fileselect_t, fileselect);
TXT_EmitSignal(&fileselect->widget, "changed");
}
txt_fileselect_t *TXT_NewFileSelector(char **variable, int size,
const char *prompt, const char **extensions)
{
txt_fileselect_t *fileselect;
fileselect = malloc(sizeof(txt_fileselect_t));
TXT_InitWidget(fileselect, &txt_fileselect_class);
fileselect->inputbox = TXT_NewInputBox(variable, 1024);
fileselect->inputbox->widget.parent = &fileselect->widget;
fileselect->size = size;
fileselect->prompt = prompt;
fileselect->extensions = extensions;
TXT_SignalConnect(fileselect->inputbox, "changed",
InputBoxChanged, fileselect);
return fileselect;
}