Support Coalesced Touch in ppapi

content/renderer/pepper/pepper_plugin_instance_impl.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "content/renderer/pepper/pepper_plugin_instance_impl.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bit_cast.h"
@@ skipping 79 matching lines @@
 #include "ppapi/shared_impl/scoped_pp_resource.h"
 #include "ppapi/shared_impl/scoped_pp_var.h"
 #include "ppapi/shared_impl/time_conversion.h"
 #include "ppapi/shared_impl/url_request_info_data.h"
 #include "ppapi/shared_impl/var.h"
 #include "ppapi/thunk/enter.h"
 #include "ppapi/thunk/ppb_buffer_api.h"
 #include "printing/features/features.h"
 #include "skia/ext/platform_canvas.h"
 #include "third_party/WebKit/public/platform/URLConversion.h"
+#include "third_party/WebKit/public/platform/WebCoalescedInputEvent.h"
 #include "third_party/WebKit/public/platform/WebCursorInfo.h"
 #include "third_party/WebKit/public/platform/WebFloatRect.h"
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "third_party/WebKit/public/platform/WebKeyboardEvent.h"
 #include "third_party/WebKit/public/platform/WebMouseEvent.h"
 #include "third_party/WebKit/public/platform/WebRect.h"
 #include "third_party/WebKit/public/platform/WebSecurityOrigin.h"
 #include "third_party/WebKit/public/platform/WebString.h"
 #include "third_party/WebKit/public/platform/WebURL.h"
 #include "third_party/WebKit/public/platform/WebURLError.h"
@@ skipping 998 matching lines @@
   // some platforms, an "exclude rectangle" where candidate window
   // must avoid the region can be passed to IME. Currently, we pass
   // only the caret rectangle because it is the only information
   // supported uniformly in Chromium.
   gfx::Rect caret(text_input_caret_);
   caret.Offset(view_data_.rect.point.x, view_data_.rect.point.y);
   ConvertDIPToViewport(&caret);
   return caret;
 }
 
+bool PepperPluginInstanceImpl::HandleCoalescedInputEvent(
+    const blink::WebCoalescedInputEvent& event,
+    WebCursorInfo* cursor_info) {
+  bool result = HandleInputEvent(event.Event(), cursor_info);
+
+  if (blink::WebInputEvent::IsTouchEventType(event.Event().GetType()) &&
+      ((filtered_input_event_mask_ & PP_INPUTEVENT_CLASS_COALESCED_TOUCH) ||
+       (input_event_mask_ & PP_INPUTEVENT_CLASS_COALESCED_TOUCH))) {
+    // Handle all the Touch Events one by one. The event at index 0 is
+    // event.Event().

[Navid Zolghadr, 2017/05/01 15:53:33]

Is there any reason you are only doing this for touch events and not mouse
events?

[jkwang, 2017/05/02 18:59:15]

There is no reason to not do it for mouse events. We can add the support for
mouse event later if we care(Is there a use case?). Currently, touch events
should be good enough for stylus support in ink.

+    for (size_t i = 1; i < event.CoalescedEventSize(); ++i) {
+      HandleInputEvent(event.CoalescedEvent(i), cursor_info);
+    }
+  }
+  return result;
+}
+
 bool PepperPluginInstanceImpl::HandleInputEvent(
     const blink::WebInputEvent& event,
     WebCursorInfo* cursor_info) {
   TRACE_EVENT0("ppapi", "PepperPluginInstanceImpl::HandleInputEvent");
 
   if (!has_been_clicked_ && is_flash_plugin_ &&
       event.GetType() == blink::WebInputEvent::kMouseDown &&
       (event.GetModifiers() & blink::WebInputEvent::kLeftButtonDown)) {
     has_been_clicked_ = true;
     blink::WebRect bounds = container()->GetElement().BoundsInViewport();
@@ skipping 2325 matching lines @@
     const cc::TextureMailbox& mailbox) const {
   auto it =
       std::find_if(texture_ref_counts_.begin(), texture_ref_counts_.end(),
                    [&mailbox](const TextureMailboxRefCount& ref_count) {
                      return ref_count.first.mailbox() == mailbox.mailbox();
                    });
   return it != texture_ref_counts_.end();
 }
 
 }  // namespace content