Enable directory browsing
Extracting the appropriate globs from the MIME database.
This commit is contained in:
parent
f21100fb02
commit
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GPG Key ID:
A0420B94F92B9493
@ -46,7 +46,8 @@ a package with the latest development version from Archlinux's AUR.
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Building and Running
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--------------------
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Build dependencies: Meson, pkg-config +
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Runtime dependencies: gtk+-3.0, libturbojpeg, LibRaw (optional)
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Runtime dependencies: gtk+-3.0, libturbojpeg, LibRaw (optional),
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shared-mime-info
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$ git clone --recursive https://git.janouch.name/p/fastiv.git
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$ meson builddir
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388
fastiv.c
388
fastiv.c
@ -17,12 +17,15 @@
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#include <gtk/gtk.h>
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#include <glib.h>
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#include <glib/gstdio.h>
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#include <stdio.h>
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#include <stdarg.h>
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#include <stdlib.h>
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#include <locale.h>
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#include <fnmatch.h>
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#include "config.h"
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#include "fastiv-view.h"
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@ -45,38 +48,313 @@ exit_fatal(const gchar *format, ...)
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exit(EXIT_FAILURE);
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}
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/// Add `element` to the `output` set. `relation` is a map of sets of strings
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/// defining is-a relations, and is traversed recursively.
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static void
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add_applying_transitive_closure(const gchar *element, GHashTable *relation,
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GHashTable *output)
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{
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// Stop condition.
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if (!g_hash_table_add(output, g_strdup(element)))
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return;
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// TODO(p): Iterate over all aliases of `element` in addition to
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// any direct match (and rename this no-longer-generic function).
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GHashTable *targets = g_hash_table_lookup(relation, element);
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if (!targets)
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return;
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GHashTableIter iter;
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g_hash_table_iter_init(&iter, targets);
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gpointer key = NULL, value = NULL;
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while (g_hash_table_iter_next(&iter, &key, &value))
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add_applying_transitive_closure(key, relation, output);
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}
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// --- XDG ---------------------------------------------------------------------
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static gchar *
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get_xdg_home_dir(const char *var, const char *default_)
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{
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const char *env = getenv(var);
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if (env && *env == '/')
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return g_strdup(env);
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// The specification doesn't handle a missing HOME variable explicitly.
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// Implicitly, assuming Bourne shell semantics, it simply resolves empty.
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const char *home = getenv("HOME");
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return g_build_filename(home ? home : "", default_, NULL);
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}
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static gchar **
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get_xdg_data_dirs(void)
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{
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// GStrvBuilder is too new, it would help a little bit.
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GPtrArray *output = g_ptr_array_new_with_free_func(g_free);
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g_ptr_array_add(output, get_xdg_home_dir("XDG_DATA_HOME", ".local/share"));
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const gchar *xdg_data_dirs;
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if (!(xdg_data_dirs = getenv("XDG_DATA_DIRS")) || !*xdg_data_dirs)
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xdg_data_dirs = "/usr/local/share/:/usr/share/";
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gchar **candidates = g_strsplit(xdg_data_dirs, ":", 0);
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for (gchar **p = candidates; *p; p++) {
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if (**p == '/')
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g_ptr_array_add(output, *p);
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else
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g_free(*p);
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}
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g_free(candidates);
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g_ptr_array_add(output, NULL);
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return (gchar **) g_ptr_array_free(output, FALSE);
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}
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// --- Filtering ---------------------------------------------------------------
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// Derived from shared-mime-info-spec 0.21.
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// TODO(p): Move to fastiv-io.c, expose the prototype in a header file
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// (perhaps finally start a new one for it).
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// A subset of shared-mime-info that produces an appropriate list of
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// file extensions. Chiefly motivated by the suckiness of RAW images:
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// someone else will maintain the list of file extensions for us.
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static const char *supported_media_types[] = {
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"image/bmp",
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"image/gif",
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"image/png",
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"image/jpeg",
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#ifdef HAVE_LIBRAW
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"image/x-dcraw",
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#endif // HAVE_LIBRAW
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};
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static void
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read_mime_subclasses(const gchar *path, GHashTable *subclass_sets)
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{
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gchar *data = NULL;
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if (!g_file_get_contents(path, &data, NULL /* length */, NULL /* error */))
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return;
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// The format of this file is unspecified,
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// but in practice it's a list of space-separated media types.
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gchar *datasave = NULL;
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for (gchar *line = strtok_r(data, "\r\n", &datasave); line;
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line = strtok_r(NULL, "\r\n", &datasave)) {
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gchar *linesave = NULL,
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*subclass = strtok_r(line, " ", &linesave),
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*superclass = strtok_r(NULL, " ", &linesave);
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// Nothing about comments is specified, we're being nice.
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if (!subclass || *subclass == '#' || !superclass)
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continue;
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GHashTable *set = NULL;
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if (!(set = g_hash_table_lookup(subclass_sets, superclass))) {
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set = g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
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g_hash_table_insert(subclass_sets, g_strdup(superclass), set);
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}
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g_hash_table_add(set, g_strdup(subclass));
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}
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g_free(data);
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}
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static gboolean
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filter_mime_globs(const gchar *path, guint is_globs2, GHashTable *supported_set,
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GHashTable *output_set)
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{
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gchar *data = NULL;
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if (!g_file_get_contents(path, &data, NULL /* length */, NULL /* error */))
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return FALSE;
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gchar *datasave = NULL;
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for (const gchar *line = strtok_r(data, "\r\n", &datasave); line;
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line = strtok_r(NULL, "\r\n", &datasave)) {
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if (*line == '#')
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continue;
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// We do not support __NOGLOBS__, nor even parse out the "cs" flag.
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// The weight is irrelevant.
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gchar **f = g_strsplit(line, ":", 0);
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if (g_strv_length(f) >= is_globs2 + 2) {
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const gchar *type = f[is_globs2 + 0], *glob = f[is_globs2 + 1];
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if (g_hash_table_contains(supported_set, type))
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g_hash_table_add(output_set, g_utf8_strdown(glob, -1));
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}
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g_strfreev(f);
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}
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g_free(data);
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return TRUE;
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}
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static gchar **
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get_supported_globs (void)
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{
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gchar **data_dirs = get_xdg_data_dirs();
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// The mime.cache format is inconvenient to parse,
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// we'll do it from the text files manually, and once only.
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GHashTable *subclass_sets = g_hash_table_new_full(g_str_hash, g_str_equal,
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g_free, (GDestroyNotify) g_hash_table_destroy);
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for (gsize i = 0; data_dirs[i]; i++) {
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gchar *path =
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g_build_filename(data_dirs[i], "mime", "subclasses", NULL);
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read_mime_subclasses(path, subclass_sets);
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g_free(path);
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}
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// A hash set of all supported media types, including subclasses,
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// but not aliases.
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GHashTable *supported =
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g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
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for (gsize i = 0; i < G_N_ELEMENTS(supported_media_types); i++) {
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add_applying_transitive_closure(supported_media_types[i],
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subclass_sets, supported);
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}
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g_hash_table_destroy(subclass_sets);
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// We do not support the distinction of case-sensitive globs (:cs).
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GHashTable *globs =
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g_hash_table_new_full(g_str_hash, g_str_equal, g_free, NULL);
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for (gsize i = 0; data_dirs[i]; i++) {
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gchar *path2 = g_build_filename(data_dirs[i], "mime", "globs2", NULL);
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gchar *path1 = g_build_filename(data_dirs[i], "mime", "globs", NULL);
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if (!filter_mime_globs(path2, TRUE, supported, globs))
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filter_mime_globs(path1, FALSE, supported, globs);
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g_free(path2);
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g_free(path1);
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}
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g_strfreev(data_dirs);
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g_hash_table_destroy(supported);
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gchar **result = (gchar **) g_hash_table_get_keys_as_array(globs, NULL);
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g_hash_table_steal_all(globs);
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g_hash_table_destroy(globs);
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return result;
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}
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// --- Main --------------------------------------------------------------------
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struct {
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// TODO(p): Directory filenames, index within the list, ...
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gchar **supported_globs;
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gchar *directory;
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GPtrArray *files;
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gint files_index;
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gchar *basename;
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GtkWidget *window;
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GtkWidget *view;
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} g;
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static gboolean
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is_supported(const gchar *filename)
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{
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gchar *utf8 = g_filename_to_utf8(filename, -1, NULL, NULL, NULL);
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if (!utf8)
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return FALSE;
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gchar *lowercased = g_utf8_strdown(utf8, -1);
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g_free(utf8);
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// XXX: fnmatch() uses the /locale/ encoding, but who cares nowadays.
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for (gchar **p = g.supported_globs; *p; p++)
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if (!fnmatch(*p, lowercased, 0)) {
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g_free(lowercased);
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return TRUE;
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}
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g_free(lowercased);
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return FALSE;
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}
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static void
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show_error_dialog(GError *error)
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{
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GtkWidget *dialog = gtk_message_dialog_new(GTK_WINDOW(g.window),
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GTK_DIALOG_MODAL,
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GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, "%s", error->message);
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gtk_dialog_run(GTK_DIALOG(dialog));
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gtk_widget_destroy(dialog);
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g_error_free(error);
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}
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static void
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load_directory(const gchar *dirname)
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{
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free(g.directory);
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g.directory = g_strdup(dirname);
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g_ptr_array_set_size(g.files, 0);
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g.files_index = -1;
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GError *error = NULL;
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GDir *dir = g_dir_open(dirname, 0, &error);
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if (dir) {
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for (const gchar *name = NULL; (name = g_dir_read_name(dir)); ) {
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if (!is_supported(name))
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continue;
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// XXX: We presume that this basename is from the same directory.
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if (!g_strcmp0(g.basename, name))
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g.files_index = g.files->len;
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g_ptr_array_add(g.files, g_strdup(name));
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}
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g_dir_close(dir);
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} else {
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show_error_dialog(error);
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}
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g_ptr_array_add(g.files, NULL);
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// XXX: When something outside the filtered entries is open, the index is
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// kept at -1, and browsing doesn't work. How to behave here?
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// Should we add it to the pointer array as an exception?
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}
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static void
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open(const gchar *path)
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{
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g_return_if_fail(g_path_is_absolute(path));
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GError *error = NULL;
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if (!fastiv_view_open(FASTIV_VIEW(g.view), path, &error)) {
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GtkWidget *dialog = gtk_message_dialog_new(GTK_WINDOW(g.window),
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GTK_DIALOG_MODAL,
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GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, "%s", error->message);
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gtk_dialog_run(GTK_DIALOG(dialog));
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gtk_widget_destroy(dialog);
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show_error_dialog(error);
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return;
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}
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gtk_window_set_title(GTK_WINDOW(g.window), path);
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gchar *basename = g_path_get_basename(path);
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g_free(g.basename);
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g.basename = basename;
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// So that load_directory() itself can be used for reloading.
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gchar *dirname = g_path_get_dirname(path);
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if (!g.directory || strcmp(dirname, g.directory)) {
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load_directory(dirname);
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} else {
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g.files_index = -1;
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for (guint i = 0; i + 1 < g.files->len; i++) {
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if (!g_strcmp0(g.basename, g_ptr_array_index(g.files, i)))
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g.files_index = i;
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}
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}
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g_free(dirname);
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}
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static void
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on_open(void)
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{
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// TODO(p): Populate and pass a GtkFileFilter.
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// If we want to keep this functionality, that is.
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GtkWidget *dialog = gtk_file_chooser_dialog_new("Open file",
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GTK_WINDOW(g.window), GTK_FILE_CHOOSER_ACTION_OPEN,
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"_Cancel", GTK_RESPONSE_CANCEL,
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"_Open", GTK_RESPONSE_ACCEPT, NULL);
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// The default is local-only, single item. Paths are returned absolute.
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if (gtk_dialog_run(GTK_DIALOG(dialog)) == GTK_RESPONSE_ACCEPT) {
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gchar *path = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
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open(path);
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@ -86,6 +364,33 @@ on_open(void)
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gtk_widget_destroy(dialog);
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}
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static void
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on_previous(void)
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{
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if (g.files_index >= 0) {
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int previous =
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(g.files->len - 1 + g.files_index - 1) % (g.files->len - 1);
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char *absolute =
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g_canonicalize_filename(g_ptr_array_index(g.files, previous),
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g.directory);
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open(absolute);
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g_free(absolute);
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}
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}
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static void
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on_next(void)
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{
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if (g.files_index >= 0) {
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int next = (g.files_index + 1) % (g.files->len - 1);
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char *absolute =
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g_canonicalize_filename(g_ptr_array_index(g.files, next),
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g.directory);
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open(absolute);
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g_free(absolute);
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}
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}
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int
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main(int argc, char *argv[])
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{
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@ -93,10 +398,10 @@ main(int argc, char *argv[])
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exit_fatal("cannot set locale");
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gboolean show_version = FALSE;
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gchar **files = NULL;
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gchar **path_args = NULL;
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const GOptionEntry options[] = {
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{G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &files,
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NULL, "[FILE | DIRECTORY]..."},
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{G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &path_args,
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NULL, "[FILE | DIRECTORY]"},
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{"version", 'V', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_NONE,
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&show_version, "output version information and exit", NULL},
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{},
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@ -111,6 +416,13 @@ main(int argc, char *argv[])
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return 0;
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}
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// NOTE: Firefox and Eye of GNOME both interpret multiple arguments
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// in a special way. This is problematic, because one-element lists
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// are unrepresentable.
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// TODO(p): Complain to the user if there's more than one argument.
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// Best show the help message, if we can figure that out.
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const gchar *path_arg = path_args ? path_args[0] : NULL;
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gtk_window_set_default_icon_name(PROJECT_NAME);
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g.view = g_object_new(FASTIV_TYPE_VIEW, NULL);
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@ -124,35 +436,53 @@ main(int argc, char *argv[])
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g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
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gtk_accel_group_connect(accel_group, GDK_KEY_q, 0, 0,
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g_cclosure_new(G_CALLBACK(gtk_main_quit), NULL, NULL));
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gtk_accel_group_connect(accel_group, GDK_KEY_o, 0, 0,
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g_cclosure_new(G_CALLBACK(on_open), NULL, NULL));
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gtk_accel_group_connect(accel_group, GDK_KEY_o, GDK_CONTROL_MASK, 0,
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g_cclosure_new(G_CALLBACK(on_open), NULL, NULL));
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// FIXME: The left/right arrows do not work, for whatever reason.
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gtk_accel_group_connect(accel_group, GDK_KEY_Left, 0, 0,
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g_cclosure_new(G_CALLBACK(on_previous), NULL, NULL));
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gtk_accel_group_connect(accel_group, GDK_KEY_Page_Up, 0, 0,
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g_cclosure_new(G_CALLBACK(on_previous), NULL, NULL));
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gtk_accel_group_connect(accel_group, GDK_KEY_Right, 0, 0,
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g_cclosure_new(G_CALLBACK(on_next), NULL, NULL));
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gtk_accel_group_connect(accel_group, GDK_KEY_Page_Down, 0, 0,
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g_cclosure_new(G_CALLBACK(on_next), NULL, NULL));
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gtk_accel_group_connect(accel_group, GDK_KEY_space, 0, 0,
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g_cclosure_new(G_CALLBACK(on_next), NULL, NULL));
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gtk_window_add_accel_group(GTK_WINDOW(g.window), accel_group);
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// TODO(p): Load directory entries, store in `g`.
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// - Only when there's just one filename.
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// - stat() it if it's a dictionary or a filename;
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// can just blindly try to readdir(), followed by dirname and retry
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// - But how do we filter these? We don't want to have non-images
|
||||
// on the list.
|
||||
// - When there are multiple, just take them verbatim as a list.
|
||||
// - Not entirely sure about how much sense this makes,
|
||||
// we might want to rather open several windows, or simply fork,
|
||||
// or even disallow this completely.
|
||||
gsize files_len = g_strv_length(files);
|
||||
if (files_len) {
|
||||
GDir *dir = NULL;
|
||||
if ((dir = g_dir_open(files[0], 0, NULL))) {
|
||||
const gchar *name = NULL;
|
||||
while ((name = g_dir_read_name(dir)))
|
||||
;
|
||||
g_dir_close(dir);
|
||||
}
|
||||
g.supported_globs = get_supported_globs();
|
||||
g.files = g_ptr_array_new_full(16, g_free);
|
||||
gchar *cwd = g_get_current_dir();
|
||||
|
||||
open(files[0]);
|
||||
// TODO(p): Desired behaviour:
|
||||
// - No arguments: show directory view of the current working directory.
|
||||
// - File argument: load its directory for browsing, open the file.
|
||||
// - Directory argument: load its directory for browsing, show the dir.
|
||||
GStatBuf st;
|
||||
if (!path_arg) {
|
||||
load_directory(cwd);
|
||||
} else if (g_stat(path_arg, &st)) {
|
||||
show_error_dialog(g_error_new(G_FILE_ERROR,
|
||||
g_file_error_from_errno(errno),
|
||||
"%s: %s", path_arg, g_strerror(errno)));
|
||||
load_directory(cwd);
|
||||
} else {
|
||||
gchar *path_arg_absolute = g_canonicalize_filename(path_arg, cwd);
|
||||
if (S_ISDIR(st.st_mode))
|
||||
load_directory(path_arg_absolute);
|
||||
else
|
||||
open(path_arg_absolute);
|
||||
g_free(path_arg_absolute);
|
||||
}
|
||||
g_free(cwd);
|
||||
|
||||
// TODO(p): When no picture is loaded, show a view of this directory
|
||||
// (we're missing a widget for that).
|
||||
gtk_widget_show_all(g.window);
|
||||
gtk_main();
|
||||
return 0;
|
||||
|
||||
@ -7,5 +7,5 @@ Exec=fastiv %F
|
||||
Terminal=false
|
||||
StartupNotify=true
|
||||
Categories=Graphics;2DGraphics;Viewer;
|
||||
# TODO(p): Figure out how to include RAW MIME types, if appropriate.
|
||||
MimeType=image/png;image/bmp;image/x-bmp;image/x-MS-bmp;image/gif;image/jpeg;
|
||||
# TODO(p): Generate this list from source files.
|
||||
MimeType=image/png;image/bmp;image/gif;image/jpeg;image/x-dcraw;
|
||||
|
||||
Loading…
Reference in New Issue
Block a user