From 9040b187a1c4fa380f8a12207b9dd6d04b3a10ac Mon Sep 17 00:00:00 2001
From: Stanislaw Halik <sthalik@misaki.pl>
Date: Fri, 12 Aug 2016 18:00:49 +0200
Subject: all: rename modules s#^opentrack-##. and opentrack -> api

Adjust usages.
---
 api/plugin-support.hpp | 216 +++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 216 insertions(+)
 create mode 100644 api/plugin-support.hpp

(limited to 'api/plugin-support.hpp')

diff --git a/api/plugin-support.hpp b/api/plugin-support.hpp
new file mode 100644
index 00000000..072c8da7
--- /dev/null
+++ b/api/plugin-support.hpp
@@ -0,0 +1,216 @@
+/* Copyright (c) 2015 Stanislaw Halik
+ *
+ * Permission to use, copy, modify, and/or distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ */
+
+#pragma once
+
+#include "plugin-api.hpp"
+#include "compat/options.hpp"
+
+#include <QWidget>
+#include <QDebug>
+#include <QString>
+#include <QLibrary>
+#include <QFrame>
+#include <QList>
+
+#include <cstdio>
+#include <cinttypes>
+#include <iostream>
+#include <algorithm>
+
+#include <QCoreApplication>
+#include <QFile>
+#include <QDir>
+#include <QList>
+#include <QStringList>
+
+#if defined(__APPLE__)
+#   define OPENTRACK_SOLIB_EXT "dylib"
+#elif defined(_WIN32)
+#   define OPENTRACK_SOLIB_EXT "dll"
+#else
+#   define OPENTRACK_SOLIB_EXT "so"
+#endif
+
+#include <iostream>
+
+#ifdef _MSC_VER
+#   define OPENTRACK_SOLIB_PREFIX ""
+#else
+#   define OPENTRACK_SOLIB_PREFIX "lib"
+#endif
+
+extern "C" typedef void* (*OPENTRACK_CTOR_FUNPTR)(void);
+extern "C" typedef Metadata* (*OPENTRACK_METADATA_FUNPTR)(void);
+
+struct dylib final {
+    enum Type { Filter, Tracker, Protocol };
+
+    dylib(const QString& filename, Type t) :
+        type(t),
+        filename(filename),
+        Dialog(nullptr),
+        Constructor(nullptr),
+        Meta(nullptr),
+        handle(nullptr)
+    {
+        // otherwise dlopen opens the calling executable
+        if (filename.size() == 0)
+            return;
+
+        handle = new QLibrary(filename);
+        handle->setLoadHints(QLibrary::PreventUnloadHint | handle->loadHints());
+
+        struct _foo {
+            static bool die(QLibrary*& l, bool failp)
+            {
+                if (failp)
+                {
+                    qDebug() << "failed" << l->errorString();
+                    delete l;
+                    l = nullptr;
+                }
+                return failp;
+            }
+        };
+
+        if (_foo::die(handle, !handle->load()))
+            return;
+
+        Dialog = (OPENTRACK_CTOR_FUNPTR) handle->resolve("GetDialog");
+        if (_foo::die(handle, !Dialog))
+            return;
+
+        Constructor = (OPENTRACK_CTOR_FUNPTR) handle->resolve("GetConstructor");
+        if (_foo::die(handle, !Constructor))
+            return;
+
+        Meta = (OPENTRACK_METADATA_FUNPTR) handle->resolve("GetMetadata");
+        if (_foo::die(handle, !Meta))
+            return;
+
+        auto m = mem<Metadata>(Meta());
+
+        icon = m->icon();
+        name = m->name();
+    }
+    ~dylib()
+    {
+        if (handle)
+            delete handle;
+    }
+
+    static QList<mem<dylib>> enum_libraries(const QString& library_path)
+    {
+        const char* filters_n[] = { OPENTRACK_SOLIB_PREFIX "opentrack-filter-*." OPENTRACK_SOLIB_EXT,
+                                    OPENTRACK_SOLIB_PREFIX "opentrack-tracker-*." OPENTRACK_SOLIB_EXT,
+                                    OPENTRACK_SOLIB_PREFIX "opentrack-proto-*." OPENTRACK_SOLIB_EXT,
+                                  };
+        const Type filters_t[] = { Filter, Tracker, Protocol };
+
+        QDir settingsDir(library_path);
+
+        QList<mem<dylib>> ret;
+
+        for (int i = 0; i < 3; i++)
+        {
+            QString glob = filters_n[i];
+            Type t = filters_t[i];
+            QStringList filenames = settingsDir.entryList(QStringList { glob }, QDir::Files, QDir::Name);
+
+            for (const QString& filename : filenames)
+            {
+                QIcon icon;
+                QString longName;
+                auto lib = std::make_shared<dylib>(library_path + filename, t);
+                qDebug() << "Loading" << filename;
+                std::cout.flush();
+                if (!get_metadata(lib, longName, icon))
+                    continue;
+                using d = const mem<dylib>&;
+                if (std::any_of(ret.cbegin(),
+                                ret.cend(),
+                                [&](d a) {return a->type == lib->type && a->name == lib->name;}))
+                {
+                    qDebug() << "Duplicate lib" << lib->filename;
+                    continue;
+                }
+                ret.push_back(lib);
+            }
+        }
+
+        return ret;
+    }
+
+    Type type;
+    QString filename;
+
+    QIcon icon;
+    QString name;
+
+    OPENTRACK_CTOR_FUNPTR Dialog;
+    OPENTRACK_CTOR_FUNPTR Constructor;
+    OPENTRACK_METADATA_FUNPTR Meta;
+private:
+    QLibrary* handle;
+
+    static bool get_metadata(mem<dylib> lib, QString& name, QIcon& icon)
+    {
+        Metadata* meta;
+        if (!lib->Meta || ((meta = lib->Meta()), !meta))
+            return false;
+        name = meta->name();
+        icon = meta->icon();
+        delete meta;
+        return true;
+    }
+};
+
+struct Modules
+{
+    Modules(const QString& library_path) :
+        module_list(dylib::enum_libraries(library_path)),
+        filter_modules(filter(dylib::Filter)),
+        tracker_modules(filter(dylib::Tracker)),
+        protocol_modules(filter(dylib::Protocol))
+    {}
+    QList<mem<dylib>>& filters() { return filter_modules; }
+    QList<mem<dylib>>& trackers() { return tracker_modules; }
+    QList<mem<dylib>>& protocols() { return protocol_modules; }
+private:
+    QList<mem<dylib>> module_list;
+    QList<mem<dylib>> filter_modules;
+    QList<mem<dylib>> tracker_modules;
+    QList<mem<dylib>> protocol_modules;
+
+    template<typename t>
+    static void sort(QList<t>& xs)
+    {
+        std::sort(xs.begin(), xs.end(), [&](const t& a, const t& b) { return a->name.toLower() < b->name.toLower(); });
+    }
+
+    QList<mem<dylib>> filter(dylib::Type t)
+    {
+        QList<mem<dylib>> ret;
+        for (auto x : module_list)
+            if (x->type == t)
+                ret.push_back(x);
+
+        sort(ret);
+
+        return ret;
+    }
+};
+
+template<typename t>
+mem<t> make_dylib_instance(mem<dylib> lib)
+{
+    mem<t> ret;
+    if (lib != nullptr && lib->Constructor)
+        ret = mem<t>(reinterpret_cast<t*>(reinterpret_cast<OPENTRACK_CTOR_FUNPTR>(lib->Constructor)()));
+    return ret;
+}
-- 
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