From 0f82eb83f92e356808115387ce18653994a4bde2 Mon Sep 17 00:00:00 2001
From: Zach Hilman <zachhilman@gmail.com>
Date: Mon, 24 Dec 2018 17:35:18 -0500
Subject: [PATCH] configure_input_simple: Add support for checking
 configuration errors

---
 .../configuration/configure_input_simple.cpp  | 94 ++++++++++++++++++-
 .../configuration/configure_input_simple.h    | 11 ++-
 .../configuration/configure_input_simple.ui   | 12 ++-
 3 files changed, 113 insertions(+), 4 deletions(-)

diff --git a/src/yuzu/configuration/configure_input_simple.cpp b/src/yuzu/configuration/configure_input_simple.cpp
index 07d71e9d18..75fad9954a 100644
--- a/src/yuzu/configuration/configure_input_simple.cpp
+++ b/src/yuzu/configuration/configure_input_simple.cpp
@@ -90,8 +90,9 @@ void ApplyInputProfileConfiguration(int profile_index) {
         INPUT_PROFILES.at(std::min(profile_index, static_cast<int>(INPUT_PROFILES.size() - 1))))();
 }
 
-ConfigureInputSimple::ConfigureInputSimple(QWidget* parent)
-    : QWidget(parent), ui(std::make_unique<Ui::ConfigureInputSimple>()) {
+ConfigureInputSimple::ConfigureInputSimple(
+    QWidget* parent, std::optional<Core::Frontend::ControllerParameters> constraints)
+    : QWidget(parent), ui(std::make_unique<Ui::ConfigureInputSimple>()), constraints(constraints) {
     ui->setupUi(this);
 
     for (const auto& profile : INPUT_PROFILES) {
@@ -104,6 +105,7 @@ ConfigureInputSimple::ConfigureInputSimple(QWidget* parent)
     connect(ui->profile_configure, &QPushButton::pressed, this, &ConfigureInputSimple::OnConfigure);
 
     this->loadConfiguration();
+    UpdateErrors();
 }
 
 ConfigureInputSimple::~ConfigureInputSimple() = default;
@@ -130,8 +132,96 @@ void ConfigureInputSimple::OnSelectProfile(int index) {
     const auto old_docked = Settings::values.use_docked_mode;
     ApplyInputProfileConfiguration(index);
     OnDockedModeChanged(old_docked, Settings::values.use_docked_mode);
+    UpdateErrors();
 }
 
 void ConfigureInputSimple::OnConfigure() {
     std::get<2>(INPUT_PROFILES.at(ui->profile_combobox->currentIndex()))(this);
+    UpdateErrors();
+}
+
+static bool AnyPlayersMatchingType(Settings::ControllerType type) {
+    return std::any_of(
+        Settings::values.players.begin(), Settings::values.players.begin() + 8,
+        [type](const Settings::PlayerInput& in) { return in.type == type && in.connected; });
+}
+
+void ConfigureInputSimple::UpdateErrors() {
+    if (constraints == std::nullopt) {
+        ui->error_view->setHidden(true);
+        return;
+    }
+
+    ui->error_view->setHidden(false);
+
+    QString text;
+
+    const auto number_player =
+        std::count_if(Settings::values.players.begin(), Settings::values.players.begin() + 9,
+                      [](const Settings::PlayerInput& in) { return in.connected; });
+
+    if (number_player < constraints->min_players) {
+        text += tr("<li>The game requires a <i>minimum</i> of %1 players, you currently have %2 "
+                   "players.</li>")
+                    .arg(constraints->min_players)
+                    .arg(number_player);
+    }
+
+    if (number_player > constraints->max_players) {
+        text += tr("<li>The game allows a <i>maximum</i> of %1 players, you currently have %2 "
+                   "players.</li>")
+                    .arg(constraints->max_players)
+                    .arg(number_player);
+    }
+
+    if (AnyPlayersMatchingType(Settings::ControllerType::ProController) &&
+        !constraints->allowed_pro_controller) {
+        text += tr("<li>The game does not allow the use of the <i>Pro Controller</i>.</li>");
+    }
+
+    if (AnyPlayersMatchingType(Settings::ControllerType::DualJoycon) &&
+        !constraints->allowed_joycon_dual) {
+        text += tr("<li>The game does not allow the use of <i>Dual Joycons</i>.</li>");
+    }
+
+    if (AnyPlayersMatchingType(Settings::ControllerType::LeftJoycon) &&
+        !constraints->allowed_joycon_left) {
+        text += tr("<li>The game does not allow the use of the <i>Single Left Joycon</i> "
+                   "controller.</li>");
+    }
+
+    if (AnyPlayersMatchingType(Settings::ControllerType::RightJoycon) &&
+        !constraints->allowed_joycon_right) {
+        text += tr("<li>The game does not allow the use of the <i>Single Right Joycon</i> "
+                   "controller.</li>");
+    }
+
+    if (Settings::values.players[HANDHELD_INDEX].connected && !constraints->allowed_handheld) {
+        text += tr("<li>The game does not allow the use of the <i>Handheld</i> Controller.</li>");
+    }
+
+    const auto has_single = AnyPlayersMatchingType(Settings::ControllerType::LeftJoycon) ||
+                            AnyPlayersMatchingType(Settings::ControllerType::RightJoycon);
+
+    if (has_single && !constraints->allowed_single_layout) {
+        text += tr("<li>The game does not allow <i>single joycon</i> controllers.</li>");
+    }
+
+    if (has_single && constraints->merge_dual_joycons) {
+        text += tr(
+            "<li>The game requires that pairs of <i>single joycons</i> be merged into one <i>Dual "
+            "Joycon</i> controller.</li>");
+    }
+
+    if (!text.isEmpty()) {
+        is_valid = false;
+        ui->error_view->setText(
+            "<h4 style=\"color:#CC0000;\">The following errors were identified in "
+            "your input configuration:</h4><ul>" +
+            text + "</ul>");
+    } else {
+        is_valid = true;
+        ui->error_view->setText(
+            tr("<h4 style=\"color:#00CC00;\">Your input configuration is valid.</h4>"));
+    }
 }
diff --git a/src/yuzu/configuration/configure_input_simple.h b/src/yuzu/configuration/configure_input_simple.h
index 5b6b699948..aa644558a0 100644
--- a/src/yuzu/configuration/configure_input_simple.h
+++ b/src/yuzu/configuration/configure_input_simple.h
@@ -5,9 +5,12 @@
 #pragma once
 
 #include <memory>
+#include <optional>
 
 #include <QWidget>
 
+#include "core/frontend/applets/controller.h"
+
 class QPushButton;
 class QString;
 class QTimer;
@@ -23,7 +26,9 @@ class ConfigureInputSimple : public QWidget {
     Q_OBJECT
 
 public:
-    explicit ConfigureInputSimple(QWidget* parent = nullptr);
+    explicit ConfigureInputSimple(
+        QWidget* parent = nullptr,
+        std::optional<Core::Frontend::ControllerParameters> constraints = std::nullopt);
     ~ConfigureInputSimple() override;
 
     /// Save all button configurations to settings file
@@ -36,5 +41,9 @@ private:
     void OnSelectProfile(int index);
     void OnConfigure();
 
+    void UpdateErrors();
+
     std::unique_ptr<Ui::ConfigureInputSimple> ui;
+    std::optional<Core::Frontend::ControllerParameters> constraints;
+    bool is_valid = true;
 };
diff --git a/src/yuzu/configuration/configure_input_simple.ui b/src/yuzu/configuration/configure_input_simple.ui
index c4889caa99..651d70d6c6 100644
--- a/src/yuzu/configuration/configure_input_simple.ui
+++ b/src/yuzu/configuration/configure_input_simple.ui
@@ -7,7 +7,7 @@
     <x>0</x>
     <y>0</y>
     <width>473</width>
-    <height>685</height>
+    <height>247</height>
    </rect>
   </property>
   <property name="windowTitle">
@@ -90,6 +90,16 @@
      </property>
     </spacer>
    </item>
+   <item>
+    <widget class="QTextBrowser" name="error_view">
+     <property name="maximumSize">
+      <size>
+       <width>16777215</width>
+       <height>120</height>
+      </size>
+     </property>
+    </widget>
+   </item>
   </layout>
  </widget>
  <resources/>