From 49fb5bdeb16bf23bf08bb8233324d73a34deae91 Mon Sep 17 00:00:00 2001
From: Abi Hafshin <abi@hafs.in>
Date: Sat, 12 Dec 2015 15:28:34 +0700
Subject: [PATCH] [WPE] Touch event support

---
 Source/WPE/Source/Input/LibinputServer.cpp    | 50 +++++++++++++++++++
 Source/WPE/Source/Input/LibinputServer.h      |  5 ++
 .../ViewBackend/BCMRPi/ViewBackendBCMRPi.cpp  |  8 ++-
 3 files changed, 61 insertions(+), 2 deletions(-)

diff --git a/Source/WPE/Source/Input/LibinputServer.cpp b/Source/WPE/Source/Input/LibinputServer.cpp
index 09887a993e46d..33fc4294f7d07 100644
--- a/Source/WPE/Source/Input/LibinputServer.cpp
+++ b/Source/WPE/Source/Input/LibinputServer.cpp
@@ -103,6 +103,12 @@ void LibinputServer::setHandlePointerEvents(bool handle)
     fprintf(stderr, "[LibinputServer] %s pointer events.\n", handle ? "Enabling" : "Disabling");
 }
 
+void LibinputServer::setHandleTouchEvents(bool handle)
+{
+    m_handleTouchEvents = handle;
+    fprintf(stderr, "[LibinputServer] %s handle events.\n", handle ? "Enabling" : "Disabling");
+}
+
 void LibinputServer::setPointerBounds(uint32_t width, uint32_t height)
 {
     m_pointerBounds = { width, height };
@@ -114,6 +120,19 @@ void LibinputServer::processEvents()
 
     while (auto* event = libinput_get_event(m_libinput)) {
         switch (libinput_event_get_type(event)) {
+        case LIBINPUT_EVENT_TOUCH_DOWN: 
+            if (m_handleTouchEvents)	
+                handleTouchEvent(event, Input::TouchEvent::Type::Down);
+            printf("touch down\n");
+            break;
+        case LIBINPUT_EVENT_TOUCH_UP:	
+            if (m_handleTouchEvents)	
+                handleTouchEvent(event, Input::TouchEvent::Type::Up);    
+            break;
+        case LIBINPUT_EVENT_TOUCH_MOTION:
+            if (m_handleTouchEvents)	
+                handleTouchEvent(event, Input::TouchEvent::Type::Motion);    
+            break;        
         case LIBINPUT_EVENT_KEYBOARD_KEY:
         {
             auto* keyEvent = libinput_event_get_keyboard_event(event);
@@ -204,6 +223,37 @@ void LibinputServer::dispatchKeyboardEvent(const Input::KeyboardEvent::Raw& even
     m_client->handleKeyboardEvent({ event.time, std::get<0>(result), std::get<1>(result), !!event.state, std::get<2>(result) });
 }
 
+void LibinputServer::handleTouchEvent(struct libinput_event *event, Input::TouchEvent::Type type)
+{
+    auto* touchEvent = libinput_event_get_touch_event(event);
+    uint32_t time = libinput_event_touch_get_time(touchEvent);
+    int id = libinput_event_touch_get_slot(touchEvent);
+    auto& targetPoint = m_touchEvents[id];
+    int32_t x, y;
+    
+    if (type != Input::TouchEvent::Up) {
+      x = libinput_event_touch_get_x_transformed(touchEvent, m_pointerBounds.first);
+      y = libinput_event_touch_get_y_transformed(touchEvent, m_pointerBounds.second);
+    } else {
+      // libinput can't return pointer position on touch-up
+      x = targetPoint.x;
+      y = targetPoint.y;
+    }
+    targetPoint = Input::TouchEvent::Raw{ type, time, id, x, y };
+    
+    m_client->handleTouchEvent({
+      m_touchEvents,
+      type,
+      id,
+      time
+    });
+    
+    if (type == Input::TouchEvent::Up) {
+        targetPoint = Input::TouchEvent::Raw{ Input::TouchEvent::Null, 0, -1, -1, -1 };
+    }
+}
+
+
 GSourceFuncs LibinputServer::EventSource::s_sourceFuncs = {
     nullptr, // prepare
     // check
diff --git a/Source/WPE/Source/Input/LibinputServer.h b/Source/WPE/Source/Input/LibinputServer.h
index b2276627defe8..2dff4288303b5 100644
--- a/Source/WPE/Source/Input/LibinputServer.h
+++ b/Source/WPE/Source/Input/LibinputServer.h
@@ -46,6 +46,7 @@ class LibinputServer : public Input::KeyboardEventRepeating::Client {
 
     void setClient(Input::Client* client);
     void setHandlePointerEvents(bool handle);
+    void setHandleTouchEvents(bool handle);
     void setPointerBounds(uint32_t, uint32_t);
 
 private:
@@ -68,6 +69,10 @@ class LibinputServer : public Input::KeyboardEventRepeating::Client {
     std::pair<int32_t, int32_t> m_pointerCoords;
     std::pair<uint32_t, uint32_t> m_pointerBounds;
 
+    bool m_handleTouchEvents { false };
+    std::array<Input::TouchEvent::Raw, 10> m_touchEvents;
+    void handleTouchEvent(struct libinput_event *event, Input::TouchEvent::Type type)
+
     class EventSource {
     public:
         static GSourceFuncs s_sourceFuncs;
diff --git a/Source/WPE/Source/ViewBackend/BCMRPi/ViewBackendBCMRPi.cpp b/Source/WPE/Source/ViewBackend/BCMRPi/ViewBackendBCMRPi.cpp
index 067f846af9eb5..f5e3d6ed85261 100644
--- a/Source/WPE/Source/ViewBackend/BCMRPi/ViewBackendBCMRPi.cpp
+++ b/Source/WPE/Source/ViewBackend/BCMRPi/ViewBackendBCMRPi.cpp
@@ -122,12 +122,15 @@ void ViewBackendBCMRPi::destroyBuffer(uint32_t)
 
 void ViewBackendBCMRPi::setInputClient(Input::Client* client)
 {
+    if (std::getenv("WPE_BCMRPI_TOUCH")) {
+        LibinputServer::singleton().setHandleTouchEvents(true);
+    }
     if (std::getenv("WPE_BCMRPI_CURSOR")) {
         m_cursor.reset(new Cursor(client, m_displayHandle, m_width, m_height));
         client = m_cursor.get();
         LibinputServer::singleton().setHandlePointerEvents(true);
-        LibinputServer::singleton().setPointerBounds(m_width, m_height);
     }
+    LibinputServer::singleton().setPointerBounds(m_width, m_height);
 
     LibinputServer::singleton().setClient(client);
 }
@@ -197,8 +200,9 @@ void ViewBackendBCMRPi::Cursor::handleAxisEvent(Input::AxisEvent&& event)
     m_targetClient->handleAxisEvent(std::move(event));
 }
 
-void ViewBackendBCMRPi::Cursor::handleTouchEvent(Input::TouchEvent&&)
+void ViewBackendBCMRPi::Cursor::handleTouchEvent(Input::TouchEvent&& event)
 {
+    m_targetClient->handleTouchEvent(std::move(event));
 }
 
 // The cursor pointer data uses the modified left_ptr cursor from the