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/* See LICENSE file for copyright and license details. */
#include "common.h"
static GExiv2Metadata *
load_exif_metadata(const unsigned char *data, size_t length, char ***tags_out)
{
GExiv2Metadata *metadata;
GError *error = NULL;
*tags_out = NULL;
metadata = gexiv2_metadata_new();
if (gexiv2_metadata_open_buf(metadata, data, (long int)length, &error)) {
*tags_out = gexiv2_metadata_get_exif_tags(metadata);
return metadata;
}
g_clear_error(&error);
g_object_unref(metadata);
return NULL;
}
static int
read_file(int fd, unsigned char **buf_out, size_t *size_out)
{
unsigned char *buf = NULL, *new;
size_t off = 0u;
size_t size = 0u;
ssize_t r;
int saved_errno;
*buf_out = NULL;
*size_out = 0u;
for (;;) {
if (off == size) {
if (size > SIZE_MAX - (8u << 10)) {
errno = ENOMEM;
goto fail;
}
new = realloc(buf, size += 8u << 10);
if (!new)
goto fail;
buf = new;
}
r = read(fd, &buf[off], size - off);
if (r <= 0) {
if (!r)
break;
if (errno == EINTR)
continue;
goto fail;
}
off += (size_t)r;
}
*buf_out = buf;
*size_out = off;
return 0;
fail:
saved_errno = errno;
free(buf);
errno = saved_errno;
return -1;
}
int
load_image(struct file *file, int errors_to_stderr)
{
const char *error_message;
GError *error = NULL;
GtkWidget *dialog;
GdkPixbuf *image;
GdkPixbufLoader *loader = NULL;
struct stat st;
unsigned char *buffer = NULL;
size_t size;
int fd, ret = 1;
if (!file)
return 0;
fd = open(file->path, O_RDONLY | O_NOCTTY);
if (fd < 0)
goto fail_errno;
if (fstat(fd, &st))
goto fail_errno;
if (!S_ISREG(st.st_mode)) {
error_message = "Not a regular file";
goto fail;
}
if (read_file(fd, &buffer, &size))
goto fail_errno;
file->size = st.st_size;
loader = gdk_pixbuf_loader_new();
if (!loader)
goto fail_errno;
if (!gdk_pixbuf_loader_write(loader, buffer, size, &error))
goto fail_gerror;
if (!gdk_pixbuf_loader_close(loader, &error))
goto fail_gerror;
image = gdk_pixbuf_loader_get_pixbuf(loader);
if (!image) {
error_message = "Unsupported image format";
goto fail;
}
g_object_ref(image);
g_clear_object(&file->image);
file->image = image;
if (file->exif_tags) {
g_strfreev(file->exif_tags);
file->exif_tags = NULL;
}
g_clear_object(&file->exif);
if (size <= (size_t)LONG_MAX)
file->exif = load_exif_metadata(buffer, size, &file->exif_tags);
out:
free(buffer);
g_clear_object(&loader);
if (fd >= 0)
close(fd);
return ret;
fail_gerror:
error_message = error->message;
goto fail;
fail_errno:
error_message = strerror(errno);
fail:
if (errors_to_stderr) {
weprintf("Cannot open %s: %s", file->path, error_message);
} else {
dialog = gtk_message_dialog_new(GTK_WINDOW(window), GTK_DIALOG_MODAL, GTK_MESSAGE_ERROR,
GTK_BUTTONS_CLOSE, "Cannot open %s", file->path);
gtk_message_dialog_format_secondary_text(GTK_MESSAGE_DIALOG(dialog), "%s", error_message);
gtk_dialog_run(GTK_DIALOG(dialog));
gtk_widget_destroy(dialog);
}
g_clear_error(&error);
ret = 0;
goto out;
}
static void
preview_image(GtkFileChooser *chooser, GtkWidget *preview_widget)
{
char *filename;
GdkPixbuf *preview;
GtkWidget *image, *label;
filename = gtk_file_chooser_get_preview_filename(chooser);
preview = !filename ? NULL :
gdk_pixbuf_new_from_file_at_scale(filename, PREVIEW_WIDTH, PREVIEW_HEIGHT, 1, NULL);
image = g_object_get_data(G_OBJECT(preview_widget), "image");
label = g_object_get_data(G_OBJECT(preview_widget), "label");
gtk_image_set_from_pixbuf(GTK_IMAGE(image), preview);
if (preview) {
gtk_widget_show(image);
gtk_widget_hide(label);
} else {
gtk_widget_hide(image);
gtk_widget_show(label);
}
gtk_file_chooser_set_preview_widget_active(chooser, 1);
if (preview)
g_object_unref(preview);
g_free(filename);
}
static const char *
get_home_directory(void)
{
static const char *home_directory = NULL;
struct passwd *pwd;
if (home_directory)
return home_directory;
home_directory = getenv("HOME");
if (!home_directory || !*home_directory) {
pwd = getpwuid(getuid());
if (pwd && pwd->pw_dir && *pwd->pw_dir)
home_directory = pwd->pw_dir;
else
home_directory = ".";
}
return home_directory;
}
GtkFileChooser *
construct_chooser(void)
{
GtkWidget *widget, *image, *label, *preview;
GtkFileChooser *chooser;
widget = gtk_file_chooser_dialog_new("Open",
GTK_WINDOW(window),
GTK_FILE_CHOOSER_ACTION_OPEN,
GTK_STOCK_CANCEL, GTK_RESPONSE_CANCEL,
GTK_STOCK_OPEN, GTK_RESPONSE_ACCEPT,
NULL);
chooser = GTK_FILE_CHOOSER(widget);
g_object_set(gtk_settings_get_default(), "gtk-recent-files-enabled", 0, NULL);
gtk_file_chooser_set_select_multiple(chooser, 1);
gtk_file_chooser_set_current_folder(chooser, get_home_directory());
gtk_file_chooser_set_local_only(chooser, 1);
gtk_file_chooser_set_do_overwrite_confirmation(chooser, 0);
preview = gtk_vbox_new(0, 6);
image = gtk_image_new();
label = gtk_label_new("Preview");
gtk_widget_set_size_request(preview, PREVIEW_WIDTH, PREVIEW_HEIGHT);
gtk_widget_set_size_request(image, PREVIEW_WIDTH, PREVIEW_HEIGHT);
gtk_box_pack_start(GTK_BOX(preview), image, 0, 0, 0u);
gtk_box_pack_start(GTK_BOX(preview), label, 0, 0, 0u);
g_object_set_data(G_OBJECT(preview), "image", image);
g_object_set_data(G_OBJECT(preview), "label", label);
gtk_file_chooser_set_preview_widget(chooser, preview);
gtk_file_chooser_set_use_preview_label(chooser, 0);
gtk_file_chooser_set_preview_widget_active(chooser, 1);
gtk_widget_hide(image);
g_signal_connect(chooser, "update-preview", G_CALLBACK(&preview_image), preview);
return chooser;
}
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