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/*
* Copyright (C) 2017 Mentor Graphics Development (Deutschland) GmbH
*
* 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 <algorithm>
#include <regex>
#include "json_helper.hpp"
#include "layers.hpp"
#include "util.hpp"
namespace wm {
using json = nlohmann::json;
layer::layer(nlohmann::json const &j) {
if (j["type"] == "range") {
this->id_min = j["first_surface_id"];
this->id_max = j["last_surface_id"];
} else {
this->id_min = this->id_max = j["surface_id"];
}
this->role = j["role"];
this->name = j["name"];
this->layer_id = j["layer_id"];
this->rect = genivi::full_rect;
if (j["area"]["type"] == "rect") {
auto jr = j["area"]["rect"];
this->rect = genivi::rect{
jr["width"], jr["height"], jr["x"], jr["y"],
};
}
}
struct result<struct layer_map> to_layer_map(nlohmann::json const &j) {
try {
layer_map stl{};
auto m = j["mappings"];
std::transform(std::cbegin(m), std::cend(m),
std::inserter(stl.mapping, stl.mapping.end()),
[](nlohmann::json const &j) { return layer(j); });
// XXX: add sanity checks here?
// * check for double IDs
// * check for double names/roles
stl.layers.reserve(m.size());
std::transform(
std::cbegin(stl.mapping), std::cend(stl.mapping),
std::back_inserter(stl.layers), [&stl](struct layer const &k) {
stl.roles.emplace_back(std::make_pair(k.role, k.layer_id));
return unsigned(k.layer_id);
});
// XXX need to sort layers?
for (auto i : stl.mapping) {
if (i.name.empty()) {
return Err<struct layer_map>("Found mapping w/o name");
}
if (i.layer_id == -1 || i.id_min == -1 || i.id_max == -1) {
return Err<struct layer_map>("Found invalid/unset IDs in mapping");
}
}
auto msi = j.find("main_surface");
if (msi != j.end()) {
stl.main_surface_name = msi->value("surface_role", "");
stl.main_surface =
stl.main_surface_name.empty() ? int((*msi)["surface_id"]) : -1;
}
// Check lookup
auto jtests = j.value("tests", json());
if (!jtests.empty()) {
logdebug("Embedded tests...");
std::vector<std::pair<int, int>> tests;
tests.reserve(jtests.size());
std::transform(std::cbegin(jtests), std::cend(jtests),
std::back_inserter(tests), [](json const &j) {
return std::make_pair(j["surface_id"],
j["expect_layer_id"]);
});
for (auto sid : tests) {
int lid = stl.get_layer_id(sid.first).value_or(-1);
logdebug("this=%d, that=%d, expect=%d", sid.first, lid, sid.second);
if (lid != sid.second) {
return Err<layer_map>("ID Map embedded test failed!");
}
}
}
return Ok(stl);
} catch (std::exception &e) {
return Err<struct layer_map>(e.what());
}
}
// Helper to allow std::lower_bound with a int key only
inline bool
operator<(struct layer const &a, int b) {
return a.id_max < b;
}
namespace {
optional<layer> get_surface_id_to_layer(struct layer_map const *s2l,
int surface_id) {
auto i = std::lower_bound(std::cbegin(s2l->mapping), std::cend(s2l->mapping),
surface_id);
if (i != s2l->mapping.end()) {
// std::less only checks for layer::id_max, so check
// that we are actually inside of an interval here.
if (i->id_min <= surface_id) {
return optional<layer>(*i);
}
}
return nullopt;
}
} // namespace
optional<int> layer_map::get_layer_id(int surface_id) {
auto e = get_surface_id_to_layer(this, surface_id);
if (!e) {
auto i = this->surfaces.find(surface_id);
if (i != this->surfaces.end()) {
return optional<int>(int(i->second));
}
return nullopt;
}
return optional<int>(e->layer_id);
}
optional<int> layer_map::get_layer_id(std::string const &role) {
for (auto const &r : this->roles) {
auto re = std::regex(r.first);
if (std::regex_match(role, re)) {
logdebug("role %s matches layer %d", role.c_str(), r.second);
return optional<int>(r.second);
}
}
logdebug("role %s does NOT match any layer", role.c_str());
return nullopt;
}
optional<genivi::rect> layer_map::get_layer_rect(int surface_id) {
auto e = get_surface_id_to_layer(this, surface_id);
return e ? optional<genivi::rect>(e->rect) : nullopt;
}
json layer::to_json() const {
auto is_full = this->rect == genivi::full_rect;
json r{};
if (is_full) {
r = {{"type", "full"}};
} else {
r = {{"type", "rect"},
{"rect",
{{"x", this->rect.x},
{"y", this->rect.y},
{"width", this->rect.w},
{"height", this->rect.h}}}};
}
return {
{"id_min", this->id_min},
{"id_max", this->id_max},
{"name", this->name},
{"role", this->role},
{"layer_id", this->layer_id},
{"area", r},
};
}
json layer_map::to_json() const {
json j{};
for (auto const &i : this->mapping) {
j.push_back(i.to_json());
}
return j;
}
} // namespace wm
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