meta-agl-profile-telematics/LICENSE


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Different components of the AGL layers are under different licenses (a mix
of MIT and GPLv2). See LICENSE.GPL-2.0-only and LICENSE.MIT for further
details of the individual licenses.

All metadata (e.g. .bb, .bbappend, .bbclass, .inc, templates/* and similar)
is MIT licensed unless otherwise stated.
Source code included in tree for individual recipes (e.g. patches) are under
the LICENSE stated in the associated recipe (.bb file) unless otherwise stated.

License information for any other files (scripts) is either explicitly stated
or defaults to GPL version 2 only.

Individual files can contain the following style tags instead of the full
license text to identify their license:

    SPDX-License-Identifier: GPL-2.0-only
    SPDX-License-Identifier: MIT

This enables machine processing of license information based on the SPDX
License Identifiers that are here available: http://spdx.org/licenses/
/*
 * 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.
 */

#ifndef WINDOW_MANAGER_HPP
#define WINDOW_MANAGER_HPP

#include <atomic>
#include <memory>
#include <unordered_map>
#include <experimental/optional>
#include "result.hpp"
#include "pm_wrapper.hpp"
#include "util.hpp"
#include "request.hpp"
#include "wm_error.hpp"
#include "wm_layer_control.hpp"
extern "C"
{
#include <afb/afb-binding.h>
}

struct json_object;

namespace wm
{

using std::experimental::optional;

/* DrawingArea name used by "{layout}.{area}" */
extern const char kNameLayoutNormal[];
extern const char kNameLayoutSplit[];
extern const char kNameAreaFull[];
extern const char kNameAreaMain[];
extern const char kNameAreaSub[];

/* Key for json obejct */
extern const char kKeyDrawingName[];
extern const char kKeyDrawingArea[];
extern const char kKeyDrawingRect[];
extern const char kKeyX[];
extern const char kKeyY[];
extern const char kKeyWidth[];
extern const char kKeyHeigh[];
extern const char kKeyWidthPixel[];
extern const char kKeyHeightPixel[];
extern const char kKeyWidthMm[];
extern const char kKeyHeightMm[];
extern const char kKeyScale[];
extern const char kKeyIds[];

struct id_allocator
{
    unsigned next = 1;
    // Surfaces that where requested but not yet created
    std::unordered_map<unsigned, std::string> id2name;
    std::unordered_map<std::string, unsigned> name2id;

    id_allocator(id_allocator const &) = delete;
    id_allocator(id_allocator &&) = delete;
    id_allocator &operator=(id_allocator const &);
    id_allocator &operator=(id_allocator &&) = delete;

    // Insert and return a new ID
    unsigned generate_id(std::string const &name)
    {
        unsigned sid = this->next++;
        this->id2name[sid] = name;
        this->name2id[name] = sid;
        HMI_DEBUG("allocated new id %u with name %s", sid, name.c_str());
        return sid;
    }

    // Insert a new ID which defined outside
    void register_name_id(std::string const &name, unsigned sid)
    {
        this->id2name[sid] = name;
        this->name2id[name] = sid;
        HMI_DEBUG("register id %u with name %s", sid, name.c_str());
        return;
    }

    // Lookup by ID or by name
    optional<unsigned> lookup(std::string const &name) const
    {
        auto i = this->name2id.find(name);
        return i == this->name2id.end() ? nullopt : optional<unsigned>(i->second);
    }

    optional<std::string> lookup(unsigned id) const
    {
        auto i = this->id2name.find(id);
        return i == this->id2name.end() ? nullopt
                                        : optional<std::string>(i->second);
    }

    // Remove a surface id and name
    void remove_id(std::string const &name)
    {
        auto i = this->name2id.find(name);
        if (i != this->name2id.end())
        {
            this->id2name.erase(i->second);
            this->name2id.erase(i);
        }
    }

    void remove_id(unsigned id)
    {
        auto i = this->id2name.find(id);
        if (i != this->id2name.end())
        {
            this->name2id.erase(i->second);
            this->id2name.erase(i);
        }
    }
};

struct TmpClient
{
    std::string   appid;
    unsigned layer;
};


class WindowManager
{
  public:
    typedef std::unordered_map<uint32_t, struct rect> rect_map;
    typedef std::function<void(const char *err_msg)> reply_func;

    enum EventType
    {
        Event_Val_Min = 0,

        Event_Active = Event_Val_Min,
        Event_Inactive,

        Event_Visible,
        Event_Invisible,

        Event_SyncDraw,
        Event_FlushDraw,

        Event_ScreenUpdated,

        Event_Error,

        Event_Val_Max = Event_Error,
    };

    explicit WindowManager();
    ~WindowManager() = default;

    WindowManager(WindowManager const &) = delete;
    WindowManager &operator=(WindowManager const &) = delete;
    WindowManager(WindowManager &&) = delete;
    WindowManager &operator=(WindowManager &&) = delete;

    int init();

    result<int> api_request_surface(char const *appid, char const *role);
    char const *api_request_surface(char const *appid, char const *role, char const *ivi_id);
    void api_activate_window(char const *appid, char const *role, char const *drawing_area, const reply_func &reply);
    void api_deactivate_window(char const *appid, char const *role, const reply_func &reply);
    void api_enddraw(char const *appid, char const *role);
    int  api_subscribe(afb_req req, int event_id);
    result<json_object *> api_get_display_info();
    result<json_object *> api_get_area_info(char const *role);
    void send_event(const std::string& evname, const std::string& role);
    void send_event(const std::string& evname, const std::string& role, const std::string& area, int x, int y, int w, int h);

    // Events from the compositor we are interested in
    void surface_created(unsigned surface_id);
    void surface_removed(unsigned surface_id);

    void removeClient(const std::string &appid);
    void exceptionProcessForTransition();
    const char* convertRoleOldToNew(char const *role);

    // Do not use this function
    void timerHandler();
    void startTransitionWrapper(std::vector<WMAction> &actions);
    void processError(WMError error);

  private:
    // WM Events to clients
    void emit_activated(const std::string& role);
    void emit_deactivated(const std::string& role);
    void emit_syncdraw(const std::string& role, char const *area, int x, int y, int w, int h);
    void emit_syncdraw(const std::string &role, const std::string &area);
    void emit_flushdraw(const std::string& role);
    void emit_visible(const std::string& role, bool is_visible);
    void emit_invisible(const std::string& role);
    void emit_visible(const std::string& role);

    WMError setRequest(const std::string &appid, const std::string &role, const std::string &area,
                             Task task, unsigned *req_num);
    WMError checkPolicy(unsigned req_num);
    WMError startTransition(unsigned req_num);

    WMError doEndDraw(unsigned req_num);
    void    emitScreenUpdated(unsigned req_num);

    void setTimer();
    void stopTimer();
    void processNextRequest();

    int loadOldRoleDb();

  private:
    std::map<std::string, struct afb_event> map_afb_event;
    std::unordered_map<std::string, struct rect> area2size;
    std::unordered_map<std::string, std::string> roleold2new;
    std::unordered_map<std::string, std::string> rolenew2old;
    std::shared_ptr<LayerControl> lc;
    PMWrapper pmw;
    rect_map area_info;
    struct id_allocator id_alloc;

    // ID allocation and proxy methods for lookup
    std::unordered_map<unsigned, struct TmpClient> tmp_surface2app;
    static const char* kDefaultOldRoleDb;
};

} // namespace wm

#endif // WINDOW_MANAGER_HPP