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.highlight .nt { color: #bb0066; font-weight: bold } /* Name.Tag */
.highlight .nv { color: #336699 } /* Name.Variable */
.highlight .ow { color: #008800 } /* Operator.Word */
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.highlight .mb { color: #0000DD; font-weight: bold } /* Literal.Number.Bin */
.highlight .mf { color: #0000DD; font-weight: bold } /* Literal.Number.Float */
.highlight .mh { color: #0000DD; font-weight: bold } /* Literal.Number.Hex */
.highlight .mi { color: #0000DD; font-weight: bold } /* Literal.Number.Integer */
.highlight .mo { color: #0000DD; font-weight: bold } /* Literal.Number.Oct */
.highlight .sa { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Affix */
.highlight .sb { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Backtick */
.highlight .sc { color: #dd2200; background-color: #fff0f0 } /* Literal.String.Char */
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.highlight .si { color: #3333bb; background-color: #fff0f0 } /* Literal.String.Interpol */
.highlight .sx { color: #22bb22; background-color: #f0fff0 } /* Literal.String.Other */
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.highlight .fm { color: #0066bb; font-weight: bold } /* Name.Function.Magic */
.highlight .vc { color: #336699 } /* Name.Variable.Class */
.highlight .vg { color: #dd7700 } /* Name.Variable.Global */
.highlight .vi { color: #3333bb } /* Name.Variable.Instance */
.highlight .vm { color: #336699 } /* Name.Variable.Magic */
.highlight .il { color: #0000DD; font-weight: bold } /* Literal.Number.Integer.Long */
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/*
 * Copyright (c) 2017 TOYOTA MOTOR CORPORATION
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <unistd.h>
#include <algorithm>
#include <mutex>
#include <json.h>
#include "window_manager.hpp"
#include "json_helper.hpp"

extern "C"
{
#include <afb/afb-binding.h>
#include <systemd/sd-event.h>
}

typedef struct WMClientCtxt
{
    std::string name;
    std::string role;
    WMClientCtxt(const char *appName, const char* appRole)
    {
        name = appName;
        role = appRole;
    }
} WMClientCtxt;

struct afb_instance
{
    wm::WindowManager wmgr;

    afb_instance() : wmgr() {}
    ~afb_instance() = default;

    int init();
};

struct afb_instance *g_afb_instance;
std::mutex binding_m;

int afb_instance::init()
{
    return this->wmgr.init();
}

int _binding_init()
{
    HMI_NOTICE("WinMan ver. %s", WINMAN_VERSION_STRING);

    g_afb_instance = new afb_instance;

    if (g_afb_instance->init() == -1)
    {
        HMI_ERROR("Could not connect to compositor");
        goto error;
    }

    atexit([] { delete g_afb_instance; });

    return 0;

error:
    delete g_afb_instance;
    g_afb_instance = nullptr;
    return -1;
}

int binding_init() noexcept
{
    try
    {
        return _binding_init();
    }
    catch (std::exception &e)
    {
        HMI_ERROR("Uncaught exception in binding_init(): %s", e.what());
    }
    return -1;
}

static void cbRemoveClientCtxt(void *data)
{
    WMClientCtxt *ctxt = (WMClientCtxt *)data;
    if (ctxt == nullptr)
    {
        return;
    }
    HMI_DEBUG("remove app %s", ctxt->name.c_str());

    // Policy Manager does not know this app was killed,
    // so notify it by deactivate request.
    g_afb_instance->wmgr.api_deactivate_surface(
        ctxt->name.c_str(), ctxt->role.c_str(),
        [](const char *) {});

    g_afb_instance->wmgr.removeClient(ctxt->name);
    delete ctxt;
}

static void createSecurityContext(afb_req req, const char* appid, const char* role)
{
    WMClientCtxt *ctxt = (WMClientCtxt *)afb_req_context_get(req);
    if (!ctxt)
    {
        // Create Security Context at first time
        const char *new_role = g_afb_instance->wmgr.convertRoleOldToNew(role);
        WMClientCtxt *ctxt = new WMClientCtxt(appid, new_role);
        HMI_DEBUG("create session for %s", ctxt->name.c_str());
        afb_req_session_set_LOA(req, 1);
        afb_req_context_set(req, ctxt, cbRemoveClientCtxt);
    }
}

void windowmanager_requestsurface(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {
        const char *a_drawing_name = afb_req_value(req, "drawing_name");
        if (!a_drawing_name)
        {
            afb_req_fail(req, "failed", "Need char const* argument drawing_name");
            return;
        }

        const char *appid = afb_req_get_application_id(req);
        auto ret = g_afb_instance->wmgr.api_request_surface(
            appid, a_drawing_name);
        if (ret.is_err())
        {
            afb_req_fail(req, "failed", ret.unwrap_err());
            return;
        }

        createSecurityContext(req, appid, a_drawing_name);

        afb_req_success(req, json_object_new_int(ret.unwrap()), "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling requestsurface: %s", e.what());
        return;
    }
}

void windowmanager_requestsurfacexdg(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {
        json_object *jreq = afb_req_json(req);

        json_object *j_drawing_name = nullptr;
        if (!json_object_object_get_ex(jreq, "drawing_name", &j_drawing_name))
        {
            afb_req_fail(req, "failed", "Need char const* argument drawing_name");
            return;
        }
        char const *a_drawing_name = json_object_get_string(j_drawing_name);

        json_object *j_ivi_id = nullptr;
        if (!json_object_object_get_ex(jreq, "ivi_id", &j_ivi_id))
        {
            afb_req_fail(req, "failed", "Need char const* argument ivi_id");
            return;
        }
        char const *a_ivi_id = json_object_get_string(j_ivi_id);
        char const *appid = afb_req_get_application_id(req);
        auto ret = g_afb_instance->wmgr.api_request_surface(
            appid, a_drawing_name, a_ivi_id);

        if (ret != nullptr)
        {
            afb_req_fail(req, "failed", ret);
            return;
        }

        createSecurityContext(req, appid, a_drawing_name);

        afb_req_success(req, NULL, "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling requestsurfacexdg: %s", e.what());
        return;
    }
}

void windowmanager_setrole(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);
    if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }
    try
    {
        unsigned pid = 0;
        char const *appid = afb_req_get_application_id(req);
        json_object *jreq = afb_req_json(req);

        json_object *j_role = nullptr;
        if (!json_object_object_get_ex(jreq, "role", &j_role))
        {
            afb_req_fail(req, "failed", "Need char const* argument role");
            return;
        }
        char const *a_role = json_object_get_string(j_role);

        json_object *j_pid = nullptr;
        if (json_object_object_get_ex(jreq, "pid", &j_pid))
        {
            HMI_DEBUG("PID is set");
            char const *a_pid = json_object_get_string(j_pid);
            pid = std::stol(a_pid);
        }

        auto ret = g_afb_instance->wmgr.api_set_role(appid, a_role, pid);
        if (!ret)
        {
            afb_req_fail(req, "failed", "Couldn't register");
            return;
        }

        createSecurityContext(req, appid, a_role);

        afb_req_success(req, NULL, "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling requestsurfacexdg: %s", e.what());
        return;
    }
}

void windowmanager_activatewindow(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {
        const char *a_drawing_name = afb_req_value(req, "drawing_name");
        if (!a_drawing_name)
        {
            afb_req_fail(req, "failed", "Need char const* argument drawing_name");
            return;
        }

        const char *a_drawing_area = afb_req_value(req, "drawing_area");
        if (!a_drawing_area)
        {
            afb_req_fail(req, "failed", "Need char const* argument drawing_area");
            return;
        }

        g_afb_instance->wmgr.api_activate_surface(
            afb_req_get_application_id(req),
            a_drawing_name, a_drawing_area,
            [&req](const char *errmsg) {
                if (errmsg != nullptr)
                {
                    HMI_ERROR(errmsg);
                    afb_req_fail(req, "failed", errmsg);
                    return;
                }
                afb_req_success(req, NULL, "success");
            });
    }
    catch (std::exception &e)
    {
        HMI_WARNING("failed: Uncaught exception while calling activatesurface: %s", e.what());
        g_afb_instance->wmgr.exceptionProcessForTransition();
        return;
    }
}

void windowmanager_deactivatewindow(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {
        const char *a_drawing_name = afb_req_value(req, "drawing_name");
        if (!a_drawing_name)
        {
            afb_req_fail(req, "failed", "Need char const* argument drawing_name");
            return;
        }

        g_afb_instance->wmgr.api_deactivate_surface(
            afb_req_get_application_id(req), a_drawing_name,
            [&req](const char *errmsg) {
                if (errmsg != nullptr)
                {
                    HMI_ERROR(errmsg);
                    afb_req_fail(req, "failed", errmsg);
                    return;
                }
                afb_req_success(req, NULL, "success");
            });
    }
    catch (std::exception &e)
    {
        HMI_WARNING("failed: Uncaught exception while calling deactivatesurface: %s", e.what());
        g_afb_instance->wmgr.exceptionProcessForTransition();
        return;
    }
}

void windowmanager_enddraw(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {
        const char *a_drawing_name = afb_req_value(req, "drawing_name");
        if (!a_drawing_name)
        {
            afb_req_fail(req, "failed", "Need char const* argument drawing_name");
            return;
        }
        afb_req_success(req, NULL, "success");

        g_afb_instance->wmgr.api_enddraw(
            afb_req_get_application_id(req), a_drawing_name);
    }
    catch (std::exception &e)
    {
        HMI_WARNING("failed: Uncaught exception while calling enddraw: %s", e.what());
        g_afb_instance->wmgr.exceptionProcessForTransition();
        return;
    }
}

void windowmanager_getdisplayinfo_thunk(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {
        auto ret = g_afb_instance->wmgr.api_get_display_info();
        if (ret.is_err())
        {
            afb_req_fail(req, "failed", ret.unwrap_err());
            return;
        }

        afb_req_success(req, ret.unwrap(), "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling getdisplayinfo: %s", e.what());
        return;
    }
}

void windowmanager_getareainfo_thunk(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {
        json_object *jreq = afb_req_json(req);

        json_object *j_drawing_name = nullptr;
        if (!json_object_object_get_ex(jreq, "drawing_name", &j_drawing_name))
        {
            afb_req_fail(req, "failed", "Need char const* argument drawing_name");
            return;
        }
        char const *a_drawing_name = json_object_get_string(j_drawing_name);

        auto ret = g_afb_instance->wmgr.api_get_area_info(a_drawing_name);
        if (ret.is_err())
        {
            afb_req_fail(req, "failed", ret.unwrap_err());
            return;
        }

        afb_req_success(req, ret.unwrap(), "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling getareainfo: %s", e.what());
        return;
    }
}

void windowmanager_wm_subscribe(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {
        json_object *jreq = afb_req_json(req);
        json_object *j = nullptr;
        if (!json_object_object_get_ex(jreq, "event", &j))
        {
            afb_req_fail(req, "failed", "Need char const* argument event");
            return;
        }
        int event_type = json_object_get_int(j);
        const char *event_name = g_afb_instance->wmgr.kListEventName[event_type];
        struct afb_event event = g_afb_instance->wmgr.map_afb_event[event_name];
        int ret = afb_req_subscribe(req, event);
        if (ret)
        {
            afb_req_fail(req, "failed", "Error: afb_req_subscribe()");
            return;
        }
        afb_req_success(req, NULL, "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling wm_subscribe: %s", e.what());
        return;
    }
}

void windowmanager_list_drawing_names(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    /* if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {

        nlohmann::json j = g_afb_instance->wmgr.id_alloc.name2id;
        auto ret = wm::Ok(json_tokener_parse(j.dump().c_str()));
        if (ret.is_err())
        {
            afb_req_fail(req, "failed", ret.unwrap_err());
            return;
        }

        afb_req_success(req, ret.unwrap(), "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling list_drawing_names: %s", e.what());
        return;
    } */
}

void windowmanager_ping(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {

        g_afb_instance->wmgr.api_ping();

        afb_req_success(req, NULL, "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling ping: %s", e.what());
        return;
    }
}

void windowmanager_debug_status(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    /* if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {

        json_object *jr = json_object_new_object();
        json_object_object_add(jr, "surfaces",
                               to_json(g_afb_instance->wmgr.controller->sprops));
        json_object_object_add(jr, "layers", to_json(g_afb_instance->wmgr.controller->lprops));

        afb_req_success(req, jr, "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling debug_status: %s", e.what());
        return;
    } */
}

void windowmanager_debug_layers(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    /* if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {
        auto ret = wm::Ok(json_tokener_parse(g_afb_instance->wmgr.layers.to_json().dump().c_str()));

        afb_req_success(req, ret, "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling debug_layers: %s", e.what());
        return;
    } */
}

void windowmanager_debug_surfaces(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    /* if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {

        auto ret = wm::Ok(to_json(g_afb_instance->wmgr.controller->sprops));
        if (ret.is_err())
        {
            afb_req_fail(req, "failed", ret.unwrap_err());
            return;
        }

        afb_req_success(req, ret.unwrap(), "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling debug_surfaces: %s", e.what());
        return;
    } */
}

void windowmanager_debug_terminate(afb_req req) noexcept
{
    std::lock_guard<std::mutex> guard(binding_m);

    if (g_afb_instance == nullptr)
    {
        afb_req_fail(req, "failed", "Binding not initialized, did the compositor die?");
        return;
    }

    try
    {

        if (getenv("WINMAN_DEBUG_TERMINATE") != nullptr)
        {
            raise(SIGKILL); // afb-daemon kills it's pgroup using TERM, which
                            // doesn't play well with perf
        }

        afb_req_success(req, NULL, "success");
    }
    catch (std::exception &e)
    {
        afb_req_fail_f(req, "failed", "Uncaught exception while calling debug_terminate: %s", e.what());
        return;
    }
}

const struct afb_verb_v2 windowmanager_verbs[] = {
    {"requestsurface", windowmanager_requestsurface, nullptr, nullptr, AFB_SESSION_NONE},
    {"requestsurfacexdg", windowmanager_requestsurfacexdg, nullptr, nullptr, AFB_SESSION_NONE},
    {"setrole", windowmanager_setrole, nullptr, nullptr, AFB_SESSION_NONE},
    {"activatewindow", windowmanager_activatewindow, nullptr, nullptr, AFB_SESSION_NONE},
    {"deactivatewindow", windowmanager_deactivatewindow, nullptr, nullptr, AFB_SESSION_NONE},
    {"enddraw", windowmanager_enddraw, nullptr, nullptr, AFB_SESSION_NONE},
    {"getdisplayinfo", windowmanager_getdisplayinfo_thunk, nullptr, nullptr, AFB_SESSION_NONE},
    {"getareainfo", windowmanager_getareainfo_thunk, nullptr, nullptr, AFB_SESSION_NONE},
    {"wm_subscribe", windowmanager_wm_subscribe, nullptr, nullptr, AFB_SESSION_NONE},
    {"list_drawing_names", windowmanager_list_drawing_names, nullptr, nullptr, AFB_SESSION_NONE},
    {"ping", windowmanager_ping, nullptr, nullptr, AFB_SESSION_NONE},
    {"debug_status", windowmanager_debug_status, nullptr, nullptr, AFB_SESSION_NONE},
    {"debug_layers", windowmanager_debug_layers, nullptr, nullptr, AFB_SESSION_NONE},
    {"debug_surfaces", windowmanager_debug_surfaces, nullptr, nullptr, AFB_SESSION_NONE},
    {"debug_terminate", windowmanager_debug_terminate, nullptr, nullptr, AFB_SESSION_NONE},
    {}};

extern "C" const struct afb_binding_v2 afbBindingV2 = {
    "windowmanager", nullptr, nullptr, windowmanager_verbs, nullptr, binding_init, nullptr, 0};