WPILib Reorganization

This is a major restructuring of the WPILib repository to simply build
procedures and remove the remnants of Maven from everything except the
eclipse plugins. Gradle files have been largely simplified or rewritten,
taking advantage of splitting up parts of the build into separate build
files for ease of reading.

The eclipse plugins are now in a separate project, as is ntcore. All
dependencies are resolved via Maven dependencies, with the
Jenkins-maintained WPILib repo. Project structures have also been
simplified: we no longer have separate subprojects inside wpilibc and
wpilibj. Where possible, these changes hav been done with git renames,
to make sure we still have full history for all repositories. Other
unrelated subprojects have also been broken out: OutlineViewer is now a
separate project.

Change-Id: Ib4e2a6e1a2f66427a14f16612b0e0d69ed661878

wpilibc/shared/src/LiveWindow/LiveWindow.cpp

@@ -0,0 +1,227 @@
+#include "LiveWindow/LiveWindow.h"
+#include "networktables/NetworkTable.h"
+#include <algorithm>
+#include <sstream>
+
+/**
+ * Get an instance of the LiveWindow main class
+ * This is a singleton to guarantee that there is only a single instance
+ * regardless of
+ * how many times GetInstance is called.
+ */
+LiveWindow *LiveWindow::GetInstance() {
+  static LiveWindow instance;
+  return &instance;
+}
+
+/**
+ * LiveWindow constructor.
+ * Allocate the necessary tables.
+ */
+LiveWindow::LiveWindow() : m_scheduler(Scheduler::GetInstance()) {
+  m_liveWindowTable = NetworkTable::GetTable("LiveWindow");
+  m_statusTable = m_liveWindowTable->GetSubTable("~STATUS~");
+}
+
+/**
+ * Change the enabled status of LiveWindow
+ * If it changes to enabled, start livewindow running otherwise stop it
+ */
+void LiveWindow::SetEnabled(bool enabled) {
+  if (m_enabled == enabled) return;
+  if (enabled) {
+    if (m_firstTime) {
+      InitializeLiveWindowComponents();
+      m_firstTime = false;
+    }
+    m_scheduler->SetEnabled(false);
+    m_scheduler->RemoveAll();
+    for (auto& elem : m_components) {
+      elem.first->StartLiveWindowMode();
+    }
+  } else {
+    for (auto& elem : m_components) {
+      elem.first->StopLiveWindowMode();
+    }
+    m_scheduler->SetEnabled(true);
+  }
+  m_enabled = enabled;
+  m_statusTable->PutBoolean("LW Enabled", m_enabled);
+}
+
+/**
+ * @name AddSensor(subsystem, name, component)
+ * Add a Sensor associated with the subsystem and call it by the given name.
+ * @param subsystem The subsystem this component is part of.
+ * @param name The name of this component.
+ * @param component A LiveWindowSendable component that represents a sensor.
+ */
+//@{
+/**
+ * @brief Use a STL smart pointer to share ownership of component.
+ */
+void LiveWindow::AddSensor(const std::string &subsystem, const std::string &name,
+                           std::shared_ptr<LiveWindowSendable> component) {
+  m_components[component].subsystem = subsystem;
+  m_components[component].name = name;
+  m_components[component].isSensor = true;
+}
+
+/**
+ * @brief Pass a reference to LiveWindow and retain ownership of the component.
+ */
+void LiveWindow::AddSensor(const std::string &subsystem,
+                           const std::string &name,
+                           LiveWindowSendable &component) {
+  AddSensor(subsystem, name, std::shared_ptr<LiveWindowSendable>(
+                                 &component, [](LiveWindowSendable*){}));
+}
+
+/**
+ * @brief Use a raw pointer to the LiveWindow.
+ * @deprecated Prefer smart pointers or references.
+ */
+void LiveWindow::AddSensor(const std::string &subsystem,
+                           const std::string &name,
+                           LiveWindowSendable *component) {
+  AddSensor(subsystem, name, std::shared_ptr<LiveWindowSendable>(
+                                 component, NullDeleter<LiveWindowSendable>()));
+}
+//@}
+
+/**
+ * @name AddActuator(subsystem, name, component)
+ * Add an Actuator associated with the subsystem and call it by the given name.
+ * @param subsystem The subsystem this component is part of.
+ * @param name The name of this component.
+ * @param component A LiveWindowSendable component that represents a actuator.
+ */
+//@{
+/**
+ * @brief Use a STL smart pointer to share ownership of component.
+ */
+void LiveWindow::AddActuator(const std::string &subsystem, const std::string &name,
+                             std::shared_ptr<LiveWindowSendable> component) {
+  m_components[component].subsystem = subsystem;
+  m_components[component].name = name;
+  m_components[component].isSensor = false;
+}
+
+/**
+ * @brief Pass a reference to LiveWindow and retain ownership of the component.
+ */
+void LiveWindow::AddActuator(const std::string &subsystem,
+                             const std::string &name,
+                             LiveWindowSendable &component) {
+  AddActuator(subsystem, name, std::shared_ptr<LiveWindowSendable>(
+                                 &component, [](LiveWindowSendable*){}));
+}
+
+/**
+ * @brief Use a raw pointer to the LiveWindow.
+ * @deprecated Prefer smart pointers or references.
+ */
+void LiveWindow::AddActuator(const std::string &subsystem, const std::string &name,
+                             LiveWindowSendable *component) {
+  AddActuator(subsystem, name,
+              std::shared_ptr<LiveWindowSendable>(
+                  component, NullDeleter<LiveWindowSendable>()));
+}
+//@}
+
+/**
+ * Meant for internal use in other WPILib classes.
+ */
+void LiveWindow::AddSensor(std::string type, int channel,
+                           LiveWindowSendable *component) {
+  std::ostringstream oss;
+  oss << type << "[" << channel << "]";
+  std::string types(oss.str());
+  auto cc = new char[types.size() + 1];
+  types.copy(cc, types.size());
+  cc[types.size()] = '\0';
+  AddSensor("Ungrouped", cc, component);
+  std::shared_ptr<LiveWindowSendable> component_stl(
+      component, NullDeleter<LiveWindowSendable>());
+  if (std::find(m_sensors.begin(), m_sensors.end(), component_stl) ==
+      m_sensors.end())
+    m_sensors.push_back(component_stl);
+}
+
+/**
+ * Meant for internal use in other WPILib classes.
+ */
+void LiveWindow::AddActuator(std::string type, int channel,
+                             LiveWindowSendable *component) {
+  std::ostringstream oss;
+  oss << type << "[" << channel << "]";
+  std::string types(oss.str());
+  auto cc = new char[types.size() + 1];
+  types.copy(cc, types.size());
+  cc[types.size()] = '\0';
+  AddActuator("Ungrouped", cc, std::shared_ptr<LiveWindowSendable>(
+                                   component, [](LiveWindowSendable *) {}));
+}
+
+/**
+ * Meant for internal use in other WPILib classes.
+ */
+void LiveWindow::AddActuator(std::string type, int module, int channel,
+                             LiveWindowSendable *component) {
+  std::ostringstream oss;
+  oss << type << "[" << module << "," << channel << "]";
+  std::string types(oss.str());
+  auto cc = new char[types.size() + 1];
+  types.copy(cc, types.size());
+  cc[types.size()] = '\0';
+  AddActuator("Ungrouped", cc, std::shared_ptr<LiveWindowSendable>(
+                                   component, [](LiveWindowSendable *) {}));
+}
+
+/**
+ * Tell all the sensors to update (send) their values
+ * Actuators are handled through callbacks on their value changing from the
+ * SmartDashboard widgets.
+ */
+void LiveWindow::UpdateValues() {
+  for (auto& elem : m_sensors) {
+    elem->UpdateTable();
+  }
+}
+
+/**
+ * This method is called periodically to cause the sensors to send new values
+ * to the SmartDashboard.
+ */
+void LiveWindow::Run() {
+  if (m_enabled) {
+    UpdateValues();
+  }
+}
+
+/**
+ * Initialize all the LiveWindow elements the first time we enter LiveWindow
+ * mode. By holding off creating the NetworkTable entries, it allows them to be
+ * redefined before the first time in LiveWindow mode. This allows default
+ * sensor and actuator values to be created that are replaced with the custom
+ * names from users calling addActuator and addSensor.
+ */
+void LiveWindow::InitializeLiveWindowComponents() {
+  for (auto& elem : m_components) {
+    std::shared_ptr<LiveWindowSendable> component = elem.first;
+    LiveWindowComponent c = elem.second;
+    std::string subsystem = c.subsystem;
+    std::string name = c.name;
+    m_liveWindowTable->GetSubTable(subsystem)
+        ->PutString("~TYPE~", "LW Subsystem");
+    std::shared_ptr<ITable> table(
+        m_liveWindowTable->GetSubTable(subsystem)->GetSubTable(name));
+    table->PutString("~TYPE~", component->GetSmartDashboardType());
+    table->PutString("Name", name);
+    table->PutString("Subsystem", subsystem);
+    component->InitTable(table);
+    if (c.isSensor) {
+      m_sensors.push_back(component);
+    }
+  }
+}