src/layers.cpp

   1 /*
   2  * Copyright (c) 2017 TOYOTA MOTOR CORPORATION
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *      http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <algorithm>
  18 #include <regex>
  19
  20 #include "json_helper.hpp"
  21 #include "layers.hpp"
  22 #include "util.hpp"
  23 #include "hmi-debug.h"
  24
  25 namespace wm
  26 {
  27
  28 using json = nlohmann::json;
  29
  30 layer::layer(nlohmann::json const &j)
  31 {
  32     this->role = j["role"];
  33     this->name = j["name"];
  34     this->layer_id = j["layer_id"];
  35     this->rect = compositor::full_rect;
  36     if (j["area"]["type"] == "rect")
  37     {
  38         auto jr = j["area"]["rect"];
  39         this->rect = compositor::rect{
  40             jr["width"],
  41             jr["height"],
  42             jr["x"],
  43             jr["y"],
  44         };
  45     }
  46
  47     // Init flag of normal layout only
  48     this->is_normal_layout_only = true;
  49
  50     auto split_layouts = j.find("split_layouts");
  51     if (split_layouts != j.end())
  52     {
  53
  54         // Clear flag of normal layout only
  55         this->is_normal_layout_only = false;
  56
  57         auto &sls = j["split_layouts"];
  58         // this->layouts.reserve(sls.size());
  59         std::transform(std::cbegin(sls), std::cend(sls),
  60                        std::back_inserter(this->layouts), [this](json const &sl) {
  61                            struct split_layout l
  62                            {
  63                                sl["name"], sl["main_match"], sl["sub_match"]
  64                            };
  65                            HMI_DEBUG("wm",
  66                                      "layer %d add split_layout \"%s\" (main: \"%s\") (sub: "
  67                                      "\"%s\")",
  68                                      this->layer_id,
  69                                      l.name.c_str(), l.main_match.c_str(),
  70                                      l.sub_match.c_str());
  71                            return l;
  72                        });
  73     }
  74     HMI_DEBUG("wm", "layer_id:%d is_normal_layout_only:%d\n",
  75               this->layer_id, this->is_normal_layout_only);
  76 }
  77
  78 struct result<struct layer_map> to_layer_map(nlohmann::json const &j)
  79 {
  80     try
  81     {
  82         layer_map stl{};
  83         auto m = j["mappings"];
  84
  85         std::transform(std::cbegin(m), std::cend(m),
  86                        std::inserter(stl.mapping, stl.mapping.end()),
  87                        [](nlohmann::json const &j) {
  88                            return std::pair<int, struct layer>(
  89                                j.value("layer_id", -1), layer(j));
  90                        });
  91
  92         // TODO: add sanity checks here?
  93         // * check for double IDs
  94         // * check for double names/roles
  95
  96         stl.layers.reserve(m.size());
  97         std::transform(std::cbegin(stl.mapping), std::cend(stl.mapping),
  98                        std::back_inserter(stl.layers),
  99                        [&stl](std::pair<int, struct layer> const &k) {
 100                            stl.roles.emplace_back(
 101                                std::make_pair(k.second.role, k.second.layer_id));
 102                            return unsigned(k.second.layer_id);
 103                        });
 104
 105         std::sort(stl.layers.begin(), stl.layers.end());
 106
 107         for (auto i : stl.mapping)
 108         {
 109             if (i.second.name.empty())
 110             {
 111                 return Err<struct layer_map>("Found mapping w/o name");
 112             }
 113             if (i.second.layer_id == -1)
 114             {
 115                 return Err<struct layer_map>("Found invalid/unset IDs in mapping");
 116             }
 117         }
 118
 119         auto msi = j.find("main_surface");
 120         if (msi != j.end())
 121         {
 122             stl.main_surface_name = msi->value("surface_role", "");
 123             stl.main_surface = -1;
 124         }
 125
 126         return Ok(stl);
 127     }
 128     catch (std::exception &e)
 129     {
 130         return Err<struct layer_map>(e.what());
 131     }
 132 }
 133
 134 optional<int>
 135 layer_map::get_layer_id(int surface_id)
 136 {
 137     auto i = this->surfaces.find(surface_id);
 138     if (i != this->surfaces.end())
 139     {
 140         return optional<int>(i->second);
 141     }
 142     return nullopt;
 143 }
 144
 145 optional<int> layer_map::get_layer_id(std::string const &role)
 146 {
 147     for (auto const &r : this->roles)
 148     {
 149         auto re = std::regex(r.first);
 150         if (std::regex_match(role, re))
 151         {
 152             HMI_DEBUG("wm", "role %s matches layer %d", role.c_str(), r.second);
 153             return optional<int>(r.second);
 154         }
 155     }
 156     HMI_DEBUG("wm", "role %s does NOT match any layer", role.c_str());
 157     return nullopt;
 158 }
 159
 160 json layer::to_json() const
 161 {
 162     auto is_full = this->rect == compositor::full_rect;
 163
 164     json r{};
 165     if (is_full)
 166     {
 167         r = {{"type", "full"}};
 168     }
 169     else
 170     {
 171         r = {{"type", "rect"},
 172              {"rect",
 173               {{"x", this->rect.x},
 174                {"y", this->rect.y},
 175                {"width", this->rect.w},
 176                {"height", this->rect.h}}}};
 177     }
 178
 179     return {
 180         {"name", this->name},
 181         {"role", this->role},
 182         {"layer_id", this->layer_id},
 183         {"area", r},
 184     };
 185 }
 186
 187 json layer_map::to_json() const
 188 {
 189     json j{};
 190     for (auto const &i : this->mapping)
 191     {
 192         j.push_back(i.second.to_json());
 193     }
 194     return j;
 195 }
 196
 197 } // namespace wm