libportal file open dialog example

portal.c

#if 0
set -e
cc -D _GNU_SOURCE -g $(pkg-config --cflags libportal) portal.c -o /tmp/portal $(pkg-config --libs libportal)
/tmp/portal
#endif

/* libportal is licensed under LGPL-3.0-only :/, dynamic linking recommended */

#include <stdio.h>
#include <stdbool.h>
#include <unistd.h>
#include <libportal/portal.h>

static bool done = false;

static void open_file(XdpPortal *portal);
static void open_files(XdpPortal *portal);
static void save_file(XdpPortal *portal);

static void _files(GObject *src, GAsyncResult *res, gpointer data);
static void _save_file(GObject *src, GAsyncResult *res, gpointer data);

int main()
{
    GError *err;
    GMainContext *loop = g_main_context_default();
    XdpPortal *portal = xdp_portal_initable_new(&err);
    if (!portal) {
        fprintf(stderr, "error: %s\n", err->message);
        return 1;
    }
    
    save_file(portal);
    
    while (g_main_context_pending(loop) || !done) {
        /* set this to false to not block */
        g_main_context_iteration(loop, true);
    }
    
    g_object_unref(portal);
    g_main_context_unref(loop);
    return 0;
}

static void open_file(XdpPortal *portal)
{
    GVariantBuilder *a1;
    GVariantBuilder *a2;
    a1 = g_variant_builder_new(G_VARIANT_TYPE("a(us)"));
    a2 = g_variant_builder_new(G_VARIANT_TYPE("a(sa(us))"));
    
    g_variant_builder_add(a1, "(us)", 0, "*.opng");
    g_variant_builder_add(a2, "(s@a(us))", "Model", g_variant_builder_end(a1));
    
    GVariant *filters = g_variant_builder_end(a2);
    
    xdp_portal_open_file(portal, NULL, "Open File", filters, NULL, NULL,
        XDP_OPEN_FILE_FLAG_NONE, NULL, _files, portal);
}

static void save_file(XdpPortal *portal)
{
    GVariantBuilder *a1;
    GVariantBuilder *a2;
    a1 = g_variant_builder_new(G_VARIANT_TYPE("a(us)"));
    a2 = g_variant_builder_new(G_VARIANT_TYPE("a(sa(us))"));
    
    g_variant_builder_add(a1, "(us)", 0, "*.opng");
    g_variant_builder_add(a2, "(s@a(us))", "Model", g_variant_builder_end(a1));
    
    GVariant *filters = g_variant_builder_end(a2);
    
    xdp_portal_save_file(portal, NULL, "Save File", "model.opng", NULL, NULL, filters,
        NULL, NULL, 0, NULL, _save_file, portal);
}

static void open_files(XdpPortal *portal)
{
    GVariantBuilder *a1;
    GVariantBuilder *a2;
    a1 = g_variant_builder_new(G_VARIANT_TYPE("a(us)"));
    a2 = g_variant_builder_new(G_VARIANT_TYPE("a(sa(us))"));
    
    g_variant_builder_add(a1, "(us)", 1, "image/avif");
    g_variant_builder_add(a1, "(us)", 0, "*.jxl");
    g_variant_builder_add(a1, "(us)", 1, "image/webp");
    g_variant_builder_add(a1, "(us)", 0, "*.qoi");
    g_variant_builder_add(a1, "(us)", 1, "image/png");
    g_variant_builder_add(a1, "(us)", 1, "image/bmp");
    g_variant_builder_add(a1, "(us)", 1, "image/jpeg");
    g_variant_builder_add(a1, "(us)", 0, "*.tga");
    g_variant_builder_add(a1, "(us)", 0, "*.psd");
    g_variant_builder_add(a1, "(us)", 0, "*.dds");
    g_variant_builder_add(a1, "(us)", 1, "image/gif");
    g_variant_builder_add(a1, "(us)", 1, "image/png");
    g_variant_builder_add(a1, "(us)", 0, "*.opng");
    g_variant_builder_add(a2, "(s@a(us))", "Images", g_variant_builder_end(a1));
    
    GVariant *filters = g_variant_builder_end(a2);
    
    xdp_portal_open_file(portal, NULL, "Open Files", filters, NULL, NULL,
        XDP_OPEN_FILE_FLAG_MULTIPLE, NULL, _files, portal);
}

static void _files(GObject *src, GAsyncResult *ares, gpointer data)
{
    GError *err = NULL;
    XdpPortal *portal = data;
    GVariant *res = xdp_portal_open_file_finish(portal, ares, &err);
    if (err) {
        fprintf(stderr, "error: %s\n", err->message);
        exit(1);
    }
    
    GVariant *uris = g_variant_lookup_value(res, "uris", NULL);
    size_t count = g_variant_n_children(uris);
    for (int i = 0; i < count; i++) {
        GVariant *uri = g_variant_get_child_value(uris, i);
        printf("%s\n", g_variant_get_string(uri, NULL));
        
        g_variant_unref(uri);
    }
    
    g_variant_unref(uris);
    g_variant_unref(res);
    done = true;
}

static void _save_file(GObject *src, GAsyncResult *ares, gpointer data)
{
    GError *err = NULL;
    XdpPortal *portal = data;
    GVariant *res = xdp_portal_save_file_finish(portal, ares, &err);
    if (err) {
        fprintf(stderr, "error: %s\n", err->message);
        exit(1);
    }
    
    GVariant *uris = g_variant_lookup_value(res, "uris", NULL);
    size_t count = g_variant_n_children(uris);
    for (int i = 0; i < count; i++) {
        GVariant *uri = g_variant_get_child_value(uris, i);
        printf("%s\n", g_variant_get_string(uri, NULL));
        
        g_variant_unref(uri);
    }
    
    g_variant_unref(uris);
    g_variant_unref(res);
    done = true;
}