com.spotify.Client/spotify-preload.c at master · flathub/com.spotify.Client · GitHub

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// SPDX-License: BSD-3-Clause

#define _GNU_SOURCE
#include <stdlib.h>
#include <stdio.h>
#include <dlfcn.h>
#include <pthread.h>

static const char *ICON_NAME_OVERRIDE = "com.spotify.Client-symbolic";

/* Electron currently uses app_indicator_set_icon_full() but this covers all options in-case. */

static void (*original_set_icon_full) (void *, const char *, const char *);
static void (*original_set_icon) (void *, const char *);
static void* (*original_indicator_new) (const char *, const char *, int);
static void* (*original_indicator_new_with_path) (const char *, const char *, int, const char*);


static pthread_once_t resolve_once = PTHREAD_ONCE_INIT;

static void resolve_symbols (void)
{
    original_set_icon_full = dlsym (RTLD_NEXT, "app_indicator_set_icon_full");

    original_set_icon = dlsym (RTLD_NEXT, "app_indicator_set_icon");

    original_indicator_new = dlsym (RTLD_NEXT, "app_indicator_new");

    original_indicator_new_with_path = dlsym (RTLD_NEXT, "app_indicator_new_with_path");

    if (!original_set_icon_full ||
        !original_set_icon ||
        !original_indicator_new ||
        !original_indicator_new_with_path)
    {
        fprintf(stderr, "[spotify-icon-override] failed to resolve symbols\n");
        abort();
    }
}

static inline void ensure_resolved (void)
{
    pthread_once (&resolve_once, resolve_symbols);
}


void *app_indicator_new (const char *id, const char *icon_name, int category)
{
    ensure_resolved();

    return original_indicator_new (id, ICON_NAME_OVERRIDE, category);
}

void *app_indicator_new_with_path (const char *id, const char *icon_name, int category, const char *icon_theme_path)
{
    ensure_resolved();

    return original_indicator_new_with_path (id, ICON_NAME_OVERRIDE, category, NULL);
}

void app_indicator_set_icon (void *indicator, const char *icon_name)
{
    ensure_resolved();

    original_set_icon (indicator, ICON_NAME_OVERRIDE);
}

void app_indicator_set_icon_full (void *indicator, const char *icon_name, const char *icon_desc)
{
    ensure_resolved();

    original_set_icon_full (indicator, ICON_NAME_OVERRIDE, icon_desc);
}