Unity 8
DisplayConfigurationStorage.cpp
1 /*
2  * Copyright (C) 2017 Canonical, Ltd.
3  *
4  * This program is free software; you can redistribute it and/or modify
5  * it under the terms of the GNU General Public License as published by
6  * the Free Software Foundation; version 3.
7  *
8  * This program is distributed in the hope that it will be useful,
9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
11  * GNU General Public License for more details.
12  *
13  * You should have received a copy of the GNU General Public License
14  * along with this program. If not, see <http://www.gnu.org/licenses/>.
15  */
16 
17 #include "DisplayConfigurationStorage.h"
18 
19 #include <QFile>
20 #include <QStandardPaths>
21 #include <QJsonObject>
22 #include <QJsonDocument>
23 
24 namespace {
25 
26 inline QString stringFromEdid(const miral::Edid& edid)
27 {
28  QString str;
29  str += QString::fromStdString(edid.vendor);
30  str += QString("%1%2").arg(edid.product_code).arg(edid.serial_number);
31 
32  for (int i = 0; i < 4; i++) {
33  str += QString::fromStdString(edid.descriptors[i].string_value());
34  }
35  return str;
36 }
37 
38 }
39 
40 DisplayConfigurationStorage::DisplayConfigurationStorage()
41 {
42 }
43 
44 void DisplayConfigurationStorage::save(const miral::DisplayId &displayId, const miral::DisplayConfigurationOptions &options)
45 {
46  const QString dbPath = QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation) + QStringLiteral("/unity8/");
47  QFile f(dbPath + stringFromEdid(displayId.edid) + ".edid");
48 
49  QJsonObject json;
50  if (options.used.is_set()) json.insert("used", options.used.value());
51  if (options.clone_output_index.is_set()) json.insert("clone_output_index", static_cast<int>(options.clone_output_index.value()));
52  if (options.mode.is_set()) {
53  auto const& mode = options.mode.value();
54 
55  QString sz(QString("%1x%2").arg(mode.size.width.as_int()).arg(mode.size.height.as_int()));
56  QJsonObject jsonMode({
57  {"size", sz},
58  {"refresh_rate", mode.refresh_rate }
59  });
60  json.insert("mode", jsonMode);
61  }
62  if (options.orientation.is_set()) json.insert("orientation", static_cast<int>(options.orientation.value()));
63  if (options.form_factor.is_set()) json.insert("form_factor", static_cast<int>(options.form_factor.value()));
64  if (options.scale.is_set()) json.insert("scale", options.scale.value());
65 
66  if (f.open(QIODevice::WriteOnly)) {
67  QJsonDocument saveDoc(json);
68  f.write(saveDoc.toJson());
69  }
70 }
71 
72 bool DisplayConfigurationStorage::load(const miral::DisplayId &displayId, miral::DisplayConfigurationOptions &options) const
73 {
74  const QString dbPath = QStandardPaths::writableLocation(QStandardPaths::GenericCacheLocation) + QStringLiteral("/unity8/");
75  QFile f(dbPath + stringFromEdid(displayId.edid) + ".edid");
76 
77  if (f.open(QIODevice::ReadOnly)) {
78  QByteArray saveData = f.readAll();
79  QJsonDocument loadDoc(QJsonDocument::fromJson(saveData));
80 
81  QJsonObject json(loadDoc.object());
82  if (json.contains("used")) options.used = json["used"].toBool();
83  if (json.contains("clone_output_index")) options.clone_output_index = json["clone_output_index"].toInt();
84  if (json.contains("mode")) {
85  QJsonObject jsonMode = json["mode"].toObject();
86 
87  if (jsonMode.contains("size") && jsonMode.contains("refresh_rate")) {
88  QString sz(jsonMode["size"].toString());
89  QStringList geo = sz.split("x", QString::SkipEmptyParts);
90  if (geo.count() == 2) {
91  miral::DisplayConfigurationOptions::DisplayMode mode;
92  mode.size = mir::geometry::Size(geo[0].toInt(), geo[1].toInt());
93  mode.refresh_rate = jsonMode["refresh_rate"].toDouble();
94  options.mode = mode;
95  }
96  }
97  }
98  if (json.contains("orientation")) options.orientation = static_cast<MirOrientation>(json["orientation"].toInt());
99  if (json.contains("form_factor")) options.form_factor = static_cast<MirFormFactor>(json["form_factor"].toInt());
100  if (json.contains("scale")) options.scale = json["form_factor"].toDouble();
101 
102  return true;
103  }
104 
105  return false;
106 }