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Diffstat (limited to 'src/path-prefix.cpp')
| -rw-r--r-- | src/path-prefix.cpp | 146 |
1 files changed, 146 insertions, 0 deletions
diff --git a/src/path-prefix.cpp b/src/path-prefix.cpp new file mode 100644 index 0000000..29bffbd --- /dev/null +++ b/src/path-prefix.cpp @@ -0,0 +1,146 @@ +// 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 + +#include <glib.h> + +#include "path-prefix.h" + +/** + * Determine the location of the Inkscape data directory (typically the share/ folder + * from where Inkscape should be loading resources) and append a relative path + * + * - by default use the compile time value of INKSCAPE_DATADIR + * - on Windows inkscape_datadir will be relative to the called executable by default + * (typically inkscape/share but also handles the case where the executable is in a /bin subfolder) + * - if the environment variable INKSCAPE_DATADIR is set it will override all of the above + */ +char *append_inkscape_datadir(const char *relative_path) +{ + static gchar const *inkscape_datadir; + if (!inkscape_datadir) { + gchar *datadir; + gchar const *datadir_env = g_getenv("INKSCAPE_DATADIR"); + if (datadir_env) { + datadir = g_strdup(datadir_env); + } else { +#ifdef _WIN32 + gchar *module_path = g_win32_get_package_installation_directory_of_module(NULL); + datadir = g_build_filename(module_path, "share", NULL); + g_free(module_path); +#elif defined(__APPLE__) + gchar *program_dir = get_program_dir(); + if (g_str_has_suffix(program_dir, "Contents/MacOS")) { + datadir = g_build_filename(program_dir, "../Resources/share", nullptr); + } else { + datadir = g_strdup(INKSCAPE_DATADIR); + } + g_free(program_dir); +#else + datadir = g_strdup(INKSCAPE_DATADIR); +#endif + } + +#if GLIB_CHECK_VERSION(2,58,0) + inkscape_datadir = g_canonicalize_filename(datadir, NULL); + g_free(datadir); +#else + inkscape_datadir = datadir; +#endif + } + + if (!relative_path) { + relative_path = ""; + } + +#if GLIB_CHECK_VERSION(2,58,0) + return g_canonicalize_filename(relative_path, inkscape_datadir); +#else + return g_build_filename(inkscape_datadir, relative_path, NULL); +#endif +} + +/** + * 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 + */ +gchar *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__) + program_name = g_file_read_link("/proc/self/exe", NULL); + if (!program_name) { + g_warning("get_program_name() - g_file_read_link 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 as UTF-8 + * or NULL if it can't be determined + */ +gchar *get_program_dir() +{ + return g_path_get_dirname(get_program_name()); +} + +/* + 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 : |