p
/
fiv
1
1
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity
fiv/fastiv.c

601 lines
17 KiB
C
Raw Blame History

//
// fastiv.c: fast image viewer
//
// Copyright (c) 2021, Přemysl Eric Janouch <p@janouch.name>
//
// Permission to use, copy, modify, and/or distribute this software for any
// purpose with or without fee is hereby granted.
//
// THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
// WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
// MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY
// SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
// WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION
// OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN
// CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
//
#include <glib.h>
#include <glib/gstdio.h>
#include <gtk/gtk.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <fnmatch.h>
#include "config.h"
#include "fastiv-browser.h"
#include "fastiv-io.h"
#include "fastiv-sidebar.h"
#include "fastiv-view.h"
#include "xdg.h"
// --- Utilities ---------------------------------------------------------------
static void exit_fatal(const gchar *format, ...) G_GNUC_PRINTF(1, 2);
static void
exit_fatal(const gchar *format, ...)
{
va_list ap;
va_start(ap, format);
gchar *format_nl = g_strdup_printf("%s\n", format);
vfprintf(stderr, format_nl, ap);
free(format_nl);
va_end(ap);
exit(EXIT_FAILURE);
}
// --- Main --------------------------------------------------------------------
struct {
gchar **supported_globs;
gchar *directory;
GPtrArray *files;
gint files_index;
gchar *basename;
GtkWidget *window;
GtkWidget *stack;
GtkWidget *view;
GtkWidget *view_scroller;
GtkWidget *browser;
GtkWidget *browser_scroller;
GtkWidget *browser_paned;
GtkWidget *browser_sidebar;
} g;
static gboolean
is_supported(const gchar *filename)
{
gchar *utf8 = g_filename_to_utf8(filename, -1, NULL, NULL, NULL);
if (!utf8)
return FALSE;
gchar *lowercased = g_utf8_strdown(utf8, -1);
g_free(utf8);
// XXX: fnmatch() uses the /locale/ encoding, but who cares nowadays.
for (gchar **p = g.supported_globs; *p; p++)
if (!fnmatch(*p, lowercased, 0)) {
g_free(lowercased);
return TRUE;
}
g_free(lowercased);
return FALSE;
}
static void
show_error_dialog(GError *error)
{
GtkWidget *dialog =
gtk_message_dialog_new(GTK_WINDOW(g.window), GTK_DIALOG_MODAL,
GTK_MESSAGE_ERROR, GTK_BUTTONS_CLOSE, "%s", error->message);
gtk_dialog_run(GTK_DIALOG(dialog));
gtk_widget_destroy(dialog);
g_error_free(error);
}
static void
load_directory(const gchar *dirname)
{
if (dirname) {
free(g.directory);
g.directory = g_strdup(dirname);
}
g_ptr_array_set_size(g.files, 0);
g.files_index = -1;
GFile *file = g_file_new_for_path(g.directory);
fastiv_sidebar_set_location(FASTIV_SIDEBAR(g.browser_sidebar), file);
g_object_unref(file);
fastiv_browser_load(FASTIV_BROWSER(g.browser), g.directory);
GError *error = NULL;
GDir *dir = g_dir_open(g.directory, 0, &error);
if (dir) {
for (const gchar *name = NULL; (name = g_dir_read_name(dir)); ) {
// This really wants to make you use readdir() directly.
char *absolute = g_canonicalize_filename(name, g.directory);
gboolean is_dir = g_file_test(absolute, G_FILE_TEST_IS_DIR);
g_free(absolute);
if (is_dir || !is_supported(name))
continue;
// XXX: We presume that this basename is from the same directory.
if (!g_strcmp0(g.basename, name))
g.files_index = g.files->len;
g_ptr_array_add(g.files, g_strdup(name));
}
g_dir_close(dir);
} else {
show_error_dialog(error);
}
g_ptr_array_add(g.files, NULL);
// XXX: When something outside the filtered entries is open, the index is
// kept at -1, and browsing doesn't work. How to behave here?
// Should we add it to the pointer array as an exception?
}
static void
open(const gchar *path)
{
g_return_if_fail(g_path_is_absolute(path));
GError *error = NULL;
if (!fastiv_view_open(FASTIV_VIEW(g.view), path, &error)) {
char *base = g_filename_display_basename(path);
g_prefix_error(&error, "%s: ", base);
show_error_dialog(error);
g_free(base);
return;
}
gchar *uri = g_filename_to_uri(path, NULL, NULL);
if (uri) {
gtk_recent_manager_add_item(gtk_recent_manager_get_default(), uri);
g_free(uri);
}
gtk_window_set_title(GTK_WINDOW(g.window), path);
gtk_stack_set_visible_child(GTK_STACK(g.stack), g.view_scroller);
gchar *basename = g_path_get_basename(path);
g_free(g.basename);
g.basename = basename;
// So that load_directory() itself can be used for reloading.
gchar *dirname = g_path_get_dirname(path);
if (!g.directory || strcmp(dirname, g.directory)) {
load_directory(dirname);
} else {
g.files_index = -1;
for (guint i = 0; i + 1 < g.files->len; i++) {
if (!g_strcmp0(g.basename, g_ptr_array_index(g.files, i)))
g.files_index = i;
}
}
g_free(dirname);
}
static GtkWidget *
create_open_dialog(void)
{
GtkWidget *dialog = gtk_file_chooser_dialog_new("Open file",
GTK_WINDOW(g.window), GTK_FILE_CHOOSER_ACTION_OPEN,
"_Cancel", GTK_RESPONSE_CANCEL,
"_Open", GTK_RESPONSE_ACCEPT, NULL);
GtkFileFilter *filter = gtk_file_filter_new();
for (const char **p = fastiv_io_supported_media_types; *p; p++)
gtk_file_filter_add_mime_type(filter, *p);
#ifdef HAVE_GDKPIXBUF
gtk_file_filter_add_pixbuf_formats(filter);
#endif // HAVE_GDKPIXBUF
gtk_file_filter_set_name(filter, "Supported images");
gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), filter);
GtkFileFilter *all_files = gtk_file_filter_new();
gtk_file_filter_set_name(all_files, "All files");
gtk_file_filter_add_pattern(all_files, "*");
gtk_file_chooser_add_filter(GTK_FILE_CHOOSER(dialog), all_files);
return dialog;
}
static void
on_open(void)
{
static GtkWidget *dialog;
if (!dialog)
dialog = create_open_dialog();
// Apparently, just keeping the dialog around doesn't mean
// that it will remember its last location.
gtk_file_chooser_set_current_folder(GTK_FILE_CHOOSER(dialog), g.directory);
// The default is local-only, single item. Paths are returned absolute.
switch (gtk_dialog_run(GTK_DIALOG(dialog))) {
gchar *path;
case GTK_RESPONSE_ACCEPT:
path = gtk_file_chooser_get_filename(GTK_FILE_CHOOSER(dialog));
open(path);
g_free(path);
break;
case GTK_RESPONSE_NONE:
dialog = NULL;
return;
}
gtk_widget_hide(dialog);
}
static void
on_previous(void)
{
if (g.files_index >= 0) {
int previous =
(g.files->len - 1 + g.files_index - 1) % (g.files->len - 1);
char *absolute = g_canonicalize_filename(
g_ptr_array_index(g.files, previous), g.directory);
open(absolute);
g_free(absolute);
}
}
static void
on_next(void)
{
if (g.files_index >= 0) {
int next = (g.files_index + 1) % (g.files->len - 1);
char *absolute = g_canonicalize_filename(
g_ptr_array_index(g.files, next), g.directory);
open(absolute);
g_free(absolute);
}
}
static void
spawn_path(const char *path)
{
char *argv[] = {PROJECT_NAME, (char *) path, NULL};
GError *error = NULL;
g_spawn_async(NULL, argv, NULL, G_SPAWN_SEARCH_PATH, NULL, NULL,
NULL, &error);
g_clear_error(&error);
}
static void
on_item_activated(G_GNUC_UNUSED FastivBrowser *browser, const char *path,
GtkPlacesOpenFlags flags, G_GNUC_UNUSED gpointer data)
{
if (flags == GTK_PLACES_OPEN_NEW_WINDOW)
spawn_path(path);
else
open(path);
}
static gboolean
open_any_path(const char *path)
{
GStatBuf st;
gchar *canonical = g_canonicalize_filename(path, g.directory);
gboolean success = !g_stat(canonical, &st);
if (!success)
show_error_dialog(g_error_new(G_FILE_ERROR,
g_file_error_from_errno(errno), "%s: %s", path, g_strerror(errno)));
else if (S_ISDIR(st.st_mode))
load_directory(canonical);
else
open(canonical);
g_free(canonical);
if (g.files_index < 0) {
gtk_stack_set_visible_child(GTK_STACK(g.stack), g.browser_paned);
gtk_widget_grab_focus(g.browser_scroller);
} else {
gtk_stack_set_visible_child(GTK_STACK(g.stack), g.view_scroller);
}
return success;
}
static void
on_open_location(G_GNUC_UNUSED GtkPlacesSidebar *sidebar, GFile *location,
G_GNUC_UNUSED GtkPlacesOpenFlags flags, G_GNUC_UNUSED gpointer user_data)
{
gchar *path = g_file_get_path(location);
if (path) {
if (flags & GTK_PLACES_OPEN_NEW_WINDOW)
spawn_path(path);
else
open_any_path(path);
g_free(path);
}
}
// Cursor keys, e.g., simply cannot be bound through accelerators
// (and GtkWidget::keynav-failed would arguably be an awful solution).
//
// GtkBindingSets can be added directly through GtkStyleContext,
// but that would still require setting up action signals on the widget class,
// which is extremely cumbersome. GtkWidget::move-focus has no return value,
// so we can't override that and abort further handling.
//
// Therefore, bind directly to keypresses. Order can be fine-tuned with
// g_signal_connect{,after}(), or overriding the handler and either tactically
// chaining up or using gtk_window_propagate_key_event().
static gboolean
on_key_press(G_GNUC_UNUSED GtkWidget *widget, GdkEventKey *event,
G_GNUC_UNUSED gpointer data)
{
switch (event->state & gtk_accelerator_get_default_mod_mask()) {
case GDK_CONTROL_MASK:
switch (event->keyval) {
case GDK_KEY_o:
on_open();
return TRUE;
case GDK_KEY_l:
fastiv_sidebar_show_enter_location(
FASTIV_SIDEBAR(g.browser_sidebar));
return TRUE;
case GDK_KEY_n:
spawn_path(g.directory);
return TRUE;
}
break;
case 0:
switch (event->keyval) {
case GDK_KEY_Escape:
case GDK_KEY_q:
gtk_main_quit();
return TRUE;
case GDK_KEY_o:
on_open();
return TRUE;
case GDK_KEY_F5:
case GDK_KEY_r:
load_directory(NULL);
return TRUE;
case GDK_KEY_F9:
if (gtk_widget_is_visible(g.browser_sidebar))
gtk_widget_hide(g.browser_sidebar);
else
gtk_widget_show(g.browser_sidebar);
return TRUE;
case GDK_KEY_F11:
case GDK_KEY_f:
if (gdk_window_get_state(gtk_widget_get_window(g.window)) &
GDK_WINDOW_STATE_FULLSCREEN)
gtk_window_unfullscreen(GTK_WINDOW(g.window));
else
gtk_window_fullscreen(GTK_WINDOW(g.window));
return TRUE;
}
}
return FALSE;
}
static gboolean
on_key_press_view(G_GNUC_UNUSED GtkWidget *widget, GdkEventKey *event,
G_GNUC_UNUSED gpointer data)
{
switch (event->state & gtk_accelerator_get_default_mod_mask()) {
case 0:
switch (event->keyval) {
case GDK_KEY_Left:
case GDK_KEY_Up:
case GDK_KEY_Page_Up:
on_previous();
return TRUE;
case GDK_KEY_Right:
case GDK_KEY_Down:
case GDK_KEY_Page_Down:
case GDK_KEY_space:
on_next();
return TRUE;
}
case GDK_KEY_Tab:
case GDK_KEY_Return:
gtk_stack_set_visible_child(GTK_STACK(g.stack), g.browser_paned);
return TRUE;
}
return FALSE;
}
static gboolean
on_button_press_view(G_GNUC_UNUSED GtkWidget *widget, GdkEventButton *event)
{
if ((event->state & gtk_accelerator_get_default_mod_mask()))
return FALSE;
switch (event->button) {
case 8: // back
gtk_stack_set_visible_child(GTK_STACK(g.stack), g.browser_paned);
return TRUE;
default:
return FALSE;
}
}
static gboolean
on_button_press_browser(G_GNUC_UNUSED GtkWidget *widget, GdkEventButton *event)
{
if ((event->state & gtk_accelerator_get_default_mod_mask()))
return FALSE;
switch (event->button) {
case 9: // forward
gtk_stack_set_visible_child(GTK_STACK(g.stack), g.view_scroller);
return TRUE;
default:
return FALSE;
}
}
int
main(int argc, char *argv[])
{
gboolean show_version = FALSE, show_supported_media_types = FALSE;
gchar **path_args = NULL;
const GOptionEntry options[] = {
{G_OPTION_REMAINING, 0, 0, G_OPTION_ARG_FILENAME_ARRAY, &path_args,
NULL, "[FILE | DIRECTORY]"},
{"list-supported-media-types", 0, G_OPTION_FLAG_IN_MAIN,
G_OPTION_ARG_NONE, &show_supported_media_types,
"Output supported media types and exit", NULL},
{"version", 'V', G_OPTION_FLAG_IN_MAIN, G_OPTION_ARG_NONE,
&show_version, "Output version information and exit", NULL},
{},
};
GError *error = NULL;
gboolean initialized = gtk_init_with_args(
&argc, &argv, " - fast image viewer", options, NULL, &error);
if (show_version) {
printf(PROJECT_NAME " " PROJECT_VERSION "\n");
return 0;
}
if (show_supported_media_types) {
for (char **types = fastiv_io_all_supported_media_types(); *types; )
g_print("%s\n", *types++);
return 0;
}
if (!initialized)
exit_fatal("%s", error->message);
// NOTE: Firefox and Eye of GNOME both interpret multiple arguments
// in a special way. This is problematic, because one-element lists
// are unrepresentable.
// TODO(p): Complain to the user if there's more than one argument.
// Best show the help message, if we can figure that out.
const gchar *path_arg = path_args ? path_args[0] : NULL;
gtk_window_set_default_icon_name(PROJECT_NAME);
// This is incredibly broken https://stackoverflow.com/a/51054396/76313
// thus resolving the problem using overlaps.
const char *style = "@define-color fastiv-tile #3c3c3c; \
fastiv-view, fastiv-browser { background: #222; } \
fastiv-browser { padding: 5px; } \
fastiv-browser.item { \
border: 1px solid rgba(255, 255, 255, 0.375); \
margin: 10px; color: #000; \
background: #333; \
background-image: \
linear-gradient(45deg, @fastiv-tile 26%, transparent 26%), \
linear-gradient(-45deg, @fastiv-tile 26%, transparent 26%), \
linear-gradient(45deg, transparent 74%, @fastiv-tile 74%), \
linear-gradient(-45deg, transparent 74%, @fastiv-tile 74%); \
background-size: 40px 40px; \
background-position: 0 0, 0 20px, 20px -20px, -20px 0px; \
} \
fastiv-browser.item.symbolic { \
border-color: transparent; color: #222; \
background: #2c2c2c; background-image: none; \
}";
GtkCssProvider *provider = gtk_css_provider_new();
gtk_css_provider_load_from_data(provider, style, strlen(style), NULL);
gtk_style_context_add_provider_for_screen(gdk_screen_get_default(),
GTK_STYLE_PROVIDER(provider), GTK_STYLE_PROVIDER_PRIORITY_APPLICATION);
g.view_scroller = gtk_scrolled_window_new(NULL, NULL);
g.view = g_object_new(FASTIV_TYPE_VIEW, NULL);
gtk_widget_set_vexpand(g.view, TRUE);
gtk_widget_set_hexpand(g.view, TRUE);
g_signal_connect(g.view, "key-press-event",
G_CALLBACK(on_key_press_view), NULL);
g_signal_connect(g.view, "button-press-event",
G_CALLBACK(on_button_press_view), NULL);
gtk_container_add(GTK_CONTAINER(g.view_scroller), g.view);
gtk_widget_show_all(g.view_scroller);
// Maybe our custom widgets should derive colours from the theme instead.
gtk_scrolled_window_set_overlay_scrolling(
GTK_SCROLLED_WINDOW(g.view_scroller), FALSE);
g_object_set(gtk_settings_get_default(),
"gtk-application-prefer-dark-theme", TRUE, NULL);
g.browser_scroller = gtk_scrolled_window_new(NULL, NULL);
g.browser = g_object_new(FASTIV_TYPE_BROWSER, NULL);
gtk_widget_set_vexpand(g.browser, TRUE);
gtk_widget_set_hexpand(g.browser, TRUE);
g_signal_connect(g.browser, "item-activated",
G_CALLBACK(on_item_activated), NULL);
g_signal_connect(g.browser, "button-press-event",
G_CALLBACK(on_button_press_browser), NULL);
gtk_container_add(GTK_CONTAINER(g.browser_scroller), g.browser);
// TODO(p): As with GtkFileChooserWidget, bind:
// - C-h to filtering,
// - M-Up to going a level above,
// - mayhaps forward the rest to the sidebar, somehow.
g.browser_sidebar = g_object_new(FASTIV_TYPE_SIDEBAR, NULL);
g_signal_connect(g.browser_sidebar, "open-location",
G_CALLBACK(on_open_location), NULL);
g.browser_paned = gtk_paned_new(GTK_ORIENTATION_HORIZONTAL);
gtk_paned_add1(GTK_PANED(g.browser_paned), g.browser_sidebar);
gtk_paned_add2(GTK_PANED(g.browser_paned), g.browser_scroller);
// TODO(p): Can we not do it here separately?
gtk_widget_show_all(g.browser_paned);
g.stack = gtk_stack_new();
gtk_stack_set_transition_type(
GTK_STACK(g.stack), GTK_STACK_TRANSITION_TYPE_NONE);
gtk_container_add(GTK_CONTAINER(g.stack), g.view_scroller);
gtk_container_add(GTK_CONTAINER(g.stack), g.browser_paned);
g.window = gtk_window_new(GTK_WINDOW_TOPLEVEL);
g_signal_connect(g.window, "destroy",
G_CALLBACK(gtk_main_quit), NULL);
g_signal_connect(g.window, "key-press-event",
G_CALLBACK(on_key_press), NULL);
gtk_container_add(GTK_CONTAINER(g.window), g.stack);
char **types = fastiv_io_all_supported_media_types();
g.supported_globs = extract_mime_globs((const char **) types);
g_strfreev(types);
g.files = g_ptr_array_new_full(16, g_free);
g.directory = g_get_current_dir();
if (!path_arg || !open_any_path(path_arg))
open_any_path(g.directory);
// Try to get half of the screen vertically, in 4:3 aspect ratio.
//
// We need the GdkMonitor before the GtkWindow has a GdkWindow (i.e.,
// before it is realized). Take the smallest dimensions, out of desperation.
GdkDisplay *display = gtk_widget_get_display(g.window);
int unit = G_MAXINT;
for (int i = gdk_display_get_n_monitors(display); i--; ) {
GdkRectangle geometry = {};
gdk_monitor_get_geometry(
gdk_display_get_monitor(display, i), &geometry);
unit = MIN(unit, MIN(geometry.width, geometry.height) / 6);
}
// Ask for at least 800x600, to cover ridiculously heterogenous setups.
unit = MAX(200, unit);
gtk_window_set_default_size(GTK_WINDOW(g.window), 4 * unit, 3 * unit);
gtk_widget_show_all(g.window);
gtk_main();
return 0;
}
Reference in New Issue View Git Blame Copy Permalink