520c112732
While the DBUS API's libunity uses are still in wide use, libunity.so it's self isn't. Note that we should use DBUS directly.
127 lines
3.6 KiB
C++
127 lines
3.6 KiB
C++
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/** \file
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* \ingroup GHOST
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*/
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/* NOTE(@ideasman42): 2023-04-07, see: !106608.
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* Even though Ubuntu's Unity (desktop-environment)
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* is no longer in widespread use, DBUS API's defined by: `libunity.so`
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* are still supported by some KDE/GNOME docks (as close as it gets to a standard it seems).
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* So when `libunity.so` is available, it can still be used to update a progress bar.
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*
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* Over time `libunity.so` has become less common on the Linux Desktop.
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* (it's no longer installed by default on most distributions, or even easily available).
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* So long term Blender should be updated to talk to DBUS directly,
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* perhaps as a dynamically loaded library which is used when available.
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*
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* This would allow X11/WAYLAND to share their task-bar implementation too. */
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#include "GHOST_TaskbarX11.hh"
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#include <cassert>
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#include <cstdio>
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#include <cstdlib>
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#include <dlfcn.h>
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using unity_get_entry_t = void *(*)(const char *);
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using unity_set_progress_t = void (*)(void *, double);
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using unity_set_progress_visible_t = void (*)(void *, int);
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using unity_event_loop_t = int (*)(void *, int);
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static unity_get_entry_t unity_get_entry;
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static unity_set_progress_t unity_set_progress;
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static unity_set_progress_visible_t unity_set_progress_visible;
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static unity_event_loop_t unity_event_loop;
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static bool libunity_initialized = false;
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static bool libunity_available = false;
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static void *libunity_handle = nullptr;
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void GHOST_TaskBarX11::free()
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{
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if (libunity_handle) {
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dlclose(libunity_handle);
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libunity_handle = nullptr;
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}
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}
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bool GHOST_TaskBarX11::init()
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{
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if (libunity_initialized) {
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return libunity_available;
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}
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libunity_initialized = true;
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const char *libunity_names[] = {
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"libunity.so.4", "libunity.so.6", "libunity.so.9", "libunity.so", nullptr};
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for (int i = 0; libunity_names[i]; i++) {
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libunity_handle = dlopen(libunity_names[i], RTLD_LAZY);
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if (libunity_handle) {
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break;
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}
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}
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if (!libunity_handle) {
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return false;
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}
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unity_get_entry = (unity_get_entry_t)dlsym(libunity_handle,
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"unity_launcher_entry_get_for_desktop_id");
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if (!unity_get_entry) {
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fprintf(stderr, "failed to load libunity: %s\n", dlerror());
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return false;
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}
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unity_set_progress = (unity_set_progress_t)dlsym(libunity_handle,
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"unity_launcher_entry_set_progress");
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if (!unity_set_progress) {
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fprintf(stderr, "failed to load libunity: %s\n", dlerror());
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return false;
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}
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unity_set_progress_visible = (unity_set_progress_visible_t)dlsym(
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libunity_handle, "unity_launcher_entry_set_progress_visible");
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if (!unity_set_progress_visible) {
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fprintf(stderr, "failed to load libunity: %s\n", dlerror());
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return false;
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}
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unity_event_loop = (unity_event_loop_t)dlsym(libunity_handle, "g_main_context_iteration");
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if (!unity_event_loop) {
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fprintf(stderr, "failed to load libunity: %s\n", dlerror());
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return false;
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}
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atexit(GHOST_TaskBarX11::free);
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libunity_available = true;
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return true;
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}
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GHOST_TaskBarX11::GHOST_TaskBarX11(const char *name)
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{
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if (GHOST_TaskBarX11::init()) {
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handle = unity_get_entry(name);
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}
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else {
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handle = nullptr;
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}
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}
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bool GHOST_TaskBarX11::is_valid()
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{
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return (handle != nullptr);
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}
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void GHOST_TaskBarX11::set_progress(double progress)
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{
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assert(is_valid());
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unity_set_progress(handle, progress);
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}
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void GHOST_TaskBarX11::set_progress_enabled(bool enabled)
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{
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assert(is_valid());
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unity_set_progress_visible(handle, enabled ? 1 : 0);
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unity_event_loop(nullptr, 0);
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}
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