Cloning a bunch of stuff from the native_client repository at r6528

ppapi/native_client/tests/ppapi_example_events/ppapi_example_events.cc

+// Copyright (c) 2011 The Native Client Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+// C headers
+#include <cassert>
+#include <cstdio>
+
+// C++ headers
+#include <sstream>
+#include <string>
+
+// NaCl
+#include "ppapi/cpp/input_event.h"
+#include "ppapi/cpp/instance.h"
+#include "ppapi/cpp/module.h"
+#include "ppapi/cpp/point.h"
+#include "ppapi/cpp/var.h"
+
+namespace {
+const char* const kEventsPropertyName = "events";
+
+// Convert a given modifier to a descriptive string.  Note that the actual
+// declared type of modifier in each of the event classes is uint32_t, but it is
+// expected to be interpreted as a bitfield of 'or'ed PP_InputEvent_Modifier
+// values.
+std::string ModifierToString(uint32_t modifier) {
+  std::string s;
+  if (modifier & PP_INPUTEVENT_MODIFIER_SHIFTKEY) {
+    s += "shift ";
+  }
+  if (modifier & PP_INPUTEVENT_MODIFIER_CONTROLKEY) {
+    s += "ctrl ";
+  }
+  if (modifier & PP_INPUTEVENT_MODIFIER_ALTKEY) {
+    s += "alt ";
+  }
+  if (modifier & PP_INPUTEVENT_MODIFIER_METAKEY) {
+    s += "meta ";
+  }
+  if (modifier & PP_INPUTEVENT_MODIFIER_ISKEYPAD) {
+    s += "keypad ";
+  }
+  if (modifier & PP_INPUTEVENT_MODIFIER_ISAUTOREPEAT) {
+    s += "autorepeat ";
+  }
+  if (modifier & PP_INPUTEVENT_MODIFIER_LEFTBUTTONDOWN) {
+    s += "left-button-down ";
+  }
+  if (modifier & PP_INPUTEVENT_MODIFIER_MIDDLEBUTTONDOWN) {
+    s += "middle-button-down ";
+  }
+  if (modifier & PP_INPUTEVENT_MODIFIER_RIGHTBUTTONDOWN) {
+    s += "right-button-down ";
+  }
+  if (modifier & PP_INPUTEVENT_MODIFIER_CAPSLOCKKEY) {
+    s += "caps-lock ";
+  }
+  if (modifier & PP_INPUTEVENT_MODIFIER_NUMLOCKKEY) {
+    s += "num-lock ";
+  }
+  return s;
+}
+
+std::string MouseButtonToString(PP_InputEvent_MouseButton button) {
+  switch (button) {
+    case PP_INPUTEVENT_MOUSEBUTTON_NONE:
+      return "None";
+    case PP_INPUTEVENT_MOUSEBUTTON_LEFT:
+      return "Left";
+    case PP_INPUTEVENT_MOUSEBUTTON_MIDDLE:
+      return "Middle";
+    case PP_INPUTEVENT_MOUSEBUTTON_RIGHT:
+      return "Right";
+    default:
+      std::ostringstream stream;
+      stream << "Unrecognized ("
+             << static_cast<int32_t>(button)
+             << ")";
+      return stream.str();
+  }
+}
+
+}  // namespace
+
+class EventInstance : public pp::Instance {
+ public:
+  explicit EventInstance(PP_Instance instance)
+      : pp::Instance(instance) {
+    std::printf("EventInstance created.\n");
+    RequestInputEvents(PP_INPUTEVENT_CLASS_MOUSE | PP_INPUTEVENT_CLASS_WHEEL);
+    RequestFilteringInputEvents(PP_INPUTEVENT_CLASS_KEYBOARD);
+  }
+  virtual ~EventInstance() {}
+
+  void GotKeyEvent(const pp::KeyboardInputEvent& key_event,
+                   const std::string& kind) {
+    std::ostringstream stream;
+    stream << pp_instance() << ":"
+           << " Key event:" << kind
+           << " modifier:" << ModifierToString(key_event.GetModifiers())
+           << " key_code:" << key_event.GetKeyCode()
+           << " time:" << key_event.GetTimeStamp()
+           << " text:" << key_event.GetCharacterText().DebugString()
+           << "\n";
+    std::printf("%s", stream.str().c_str());
+    PostMessage(stream.str());
+  }
+
+  void GotMouseEvent(const pp::MouseInputEvent& mouse_event,
+                     const std::string& kind) {
+    std::ostringstream stream;
+    stream << pp_instance() << ":"
+           << " Mouse event:" << kind
+           << " modifier:" << ModifierToString(mouse_event.GetModifiers())
+           << " button:" << MouseButtonToString(mouse_event.GetButton())
+           << " x:" << mouse_event.GetPosition().x()
+           << " y:" << mouse_event.GetPosition().y()
+           << " click_count:" << mouse_event.GetClickCount()
+           << " time:" << mouse_event.GetTimeStamp()
+           << "\n";
+    std::printf("%s", stream.str().c_str());
+    PostMessage(stream.str());
+  }
+
+  void GotWheelEvent(const pp::WheelInputEvent& wheel_event) {
+    std::ostringstream stream;
+    stream << pp_instance() << ": Wheel event."
+           << " modifier:" << ModifierToString(wheel_event.GetModifiers())
+           << " deltax:" << wheel_event.GetDelta().x()
+           << " deltay:" << wheel_event.GetDelta().y()
+           << " wheel_ticks_x:" << wheel_event.GetTicks().x()
+           << " wheel_ticks_y:" << wheel_event.GetTicks().y()
+           << " scroll_by_page:"
+           << (wheel_event.GetScrollByPage() ? "true" : "false")
+           << "\n";
+    std::printf("%s", stream.str().c_str());
+    PostMessage(stream.str());
+  }
+
+  // Handle an incoming input event by switching on type and dispatching
+  // to the appropriate subtype handler.
+  virtual bool HandleInputEvent(const pp::InputEvent& event) {
+    std::printf("HandleInputEvent called\n");
+    switch (event.GetType()) {
+      case PP_INPUTEVENT_TYPE_UNDEFINED:
+        std::printf("Undefined event.\n");
+        break;
+      case PP_INPUTEVENT_TYPE_MOUSEDOWN:
+        GotMouseEvent(pp::MouseInputEvent(event), "Down");
+        break;
+      case PP_INPUTEVENT_TYPE_MOUSEUP:
+        GotMouseEvent(pp::MouseInputEvent(event), "Up");
+        break;
+      case PP_INPUTEVENT_TYPE_MOUSEMOVE:
+        GotMouseEvent(pp::MouseInputEvent(event), "Move");
+        break;
+      case PP_INPUTEVENT_TYPE_MOUSEENTER:
+        GotMouseEvent(pp::MouseInputEvent(event), "Enter");
+        break;
+      case PP_INPUTEVENT_TYPE_MOUSELEAVE:
+        GotMouseEvent(pp::MouseInputEvent(event), "Leave");
+        break;
+      case PP_INPUTEVENT_TYPE_WHEEL:
+        GotWheelEvent(pp::WheelInputEvent(event));
+        break;
+      case PP_INPUTEVENT_TYPE_RAWKEYDOWN:
+        GotKeyEvent(pp::KeyboardInputEvent(event), "RawKeyDown");
+        break;
+      case PP_INPUTEVENT_TYPE_KEYDOWN:
+        GotKeyEvent(pp::KeyboardInputEvent(event), "Down");
+        break;
+      case PP_INPUTEVENT_TYPE_KEYUP:
+        GotKeyEvent(pp::KeyboardInputEvent(event), "Up");
+        break;
+      case PP_INPUTEVENT_TYPE_CHAR:
+        GotKeyEvent(pp::KeyboardInputEvent(event), "Character");
+        break;
+      default:
+        std::printf("Unrecognized event type: %d\n", event.GetType());
+        assert(false);
+        return false;
+    }
+    return true;
+  }
+};
+
+// The EventModule provides an implementation of pp::Module that creates
+// EventInstance objects when invoked.  This is part of the glue code that makes
+// our example accessible to ppapi.
+class EventModule : public pp::Module {
+ public:
+  EventModule() : pp::Module() {}
+  virtual ~EventModule() {}
+
+  virtual pp::Instance* CreateInstance(PP_Instance instance) {
+    std::printf("Creating EventInstance.\n");
+    return new EventInstance(instance);
+  }
+};
+
+// Implement the required pp::CreateModule function that creates our specific
+// kind of Module (in this case, EventModule).  This is part of the glue code
+// that makes our example accessible to ppapi.
+namespace pp {
+  Module* CreateModule() {
+    std::printf("Creating EventModule.\n");
+    return new EventModule();
+  }
+}