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Diffstat (limited to 'src/path-prefix.cpp')
| -rw-r--r-- | src/path-prefix.cpp | 185 |
1 files changed, 185 insertions, 0 deletions
diff --git a/src/path-prefix.cpp b/src/path-prefix.cpp new file mode 100644 index 0000000..1d61748 --- /dev/null +++ b/src/path-prefix.cpp @@ -0,0 +1,185 @@ +// SPDX-License-Identifier: GPL-2.0-or-later +/** @file + * path-prefix.cpp - Inkscape specific prefix handling *//* + * Authors: + * Patrick Storz <eduard.braun2@gmx.de> + * + * Copyright (C) 2018 Authors + * Released under GNU GPL v2+, read the file 'COPYING' for more information. + */ + +#ifdef HAVE_CONFIG_H +# include "config.h" // only include where actually required! +#endif + +#ifdef _WIN32 +#include <windows.h> // for GetModuleFileNameW +#endif + +#ifdef __APPLE__ +#include <mach-o/dyld.h> // for _NSGetExecutablePath +#endif + +#ifdef __NetBSD__ +#include <sys/types.h> +#include <sys/sysctl.h> +#endif + +#ifdef __FreeBSD__ +#include <sys/param.h> +#include <sys/types.h> +#include <sys/sysctl.h> +#endif + +#include <cassert> +#include <glib.h> +#include <glibmm.h> + +#include "path-prefix.h" + +/** + * Guess the absolute path of the application bundle prefix directory. + * The result path is not guaranteed to exist. + * + * On Windows, the result should be identical to + * g_win32_get_package_installation_directory_of_module(nullptr) + */ +static std::string _get_bundle_prefix_dir() +{ + char const *program_dir = get_program_dir(); + auto prefix = Glib::path_get_dirname(program_dir); + + if (g_str_has_suffix(program_dir, "Contents/MacOS")) { + // macOS + prefix += "/Resources"; + } else if (Glib::path_get_basename(program_dir) == "bin") { + // Windows, Linux + } else if (Glib::path_get_basename(prefix) == "lib") { + // AppImage + // program_dir=appdir/lib/x86_64-linux-gnu + // prefix_dir=appdir/usr + prefix = Glib::build_filename(Glib::path_get_dirname(prefix), "usr"); + } + + return prefix; +} + +/** + * Determine the location of the Inkscape data directory (typically the share/ folder + * from where Inkscape should be loading resources). + * + * The data directory is the first of: + * + * - Environment variable $INKSCAPE_DATADIR if not empty + * - If a bundle is detected: "<bundle-prefix>/share" + * - Compile time value of INKSCAPE_DATADIR + */ +char const *get_inkscape_datadir() +{ + static char const *inkscape_datadir = nullptr; + if (!inkscape_datadir) { + static std::string datadir = Glib::getenv("INKSCAPE_DATADIR"); + + if (datadir.empty()) { + datadir = Glib::build_filename(_get_bundle_prefix_dir(), "share"); + + if (!Glib::file_test(Glib::build_filename(datadir, "inkscape"), Glib::FILE_TEST_IS_DIR)) { + datadir = INKSCAPE_DATADIR; + } + } + + inkscape_datadir = datadir.c_str(); + +#if GLIB_CHECK_VERSION(2,58,0) + inkscape_datadir = g_canonicalize_filename(inkscape_datadir, nullptr); +#endif + } + + return inkscape_datadir; +} + +/** + * Gets the the currently running program's executable name (including full path) + * + * @return executable name (including full path) encoded as UTF-8 + * or NULL if it can't be determined + */ +char const *get_program_name() +{ + static gchar *program_name = NULL; + + if (program_name == NULL) { + // There is no portable way to get an executable's name including path, so we need to do it manually. + // TODO: Re-evaluate boost::dll::program_location() once we require Boost >= 1.61 + // + // The following platform-specific code is partially based on GdxPixbuf's get_toplevel() + // See also https://stackoverflow.com/a/1024937 +#if defined(_WIN32) + wchar_t module_file_name[MAX_PATH]; + if (GetModuleFileNameW(NULL, module_file_name, MAX_PATH)) { + program_name = g_utf16_to_utf8((gunichar2 *)module_file_name, -1, NULL, NULL, NULL); + } else { + g_warning("get_program_name() - GetModuleFileNameW failed"); + } +#elif defined(__APPLE__) + char pathbuf[PATH_MAX + 1]; + uint32_t bufsize = sizeof(pathbuf); + if (_NSGetExecutablePath(pathbuf, &bufsize) == 0) { + program_name = realpath(pathbuf, nullptr); + } else { + g_warning("get_program_name() - _NSGetExecutablePath failed"); + } +#elif defined(__linux__) || defined(__CYGWIN__) + program_name = g_file_read_link("/proc/self/exe", NULL); + if (!program_name) { + g_warning("get_program_name() - g_file_read_link failed"); + } +#elif defined(__NetBSD__) + static const int name[] = {CTL_KERN, KERN_PROC_ARGS, -1, KERN_PROC_PATHNAME}; + char path[MAXPATHLEN]; + size_t len = sizeof(path); + if (sysctl(name, __arraycount(name), path, &len, NULL, 0) == 0) { + program_name = realpath(path, nullptr); + } else { + g_warning("get_program_name() - sysctl failed"); + } +#elif defined(__FreeBSD__) + int mib[4] = { CTL_KERN, KERN_PROC, KERN_PROC_PATHNAME, -1 }; + char buf[MAXPATHLEN]; + size_t cb = sizeof(buf); + if (sysctl(mib, 4, buf, &cb, NULL, 0) == 0) { + program_name = realpath(buf, nullptr); + } else { + g_warning("get_program_name() - sysctl failed"); + } +#else +#warning get_program_name() - no known way to obtain executable name on this platform + g_info("get_program_name() - no known way to obtain executable name on this platform"); +#endif + } + + return program_name; +} + +/** + * Gets the the full path to the directory containing the currently running program's executable + * + * @return full path to directory encoded in native encoding, + * or NULL if it can't be determined + */ +char const *get_program_dir() +{ + static char *program_dir = g_path_get_dirname(get_program_name()); + return program_dir; +} + +/* + Local Variables: + mode:c++ + c-file-style:"stroustrup" + c-file-offsets:((innamespace . 0)(inline-open . 0)(case-label . +)) + indent-tabs-mode:nil + fill-column:99 + End: +*/ +// vim: filetype=cpp:expandtab:shiftwidth=4:tabstop=8:softtabstop=4:fileencoding=utf-8:textwidth=99 : |