Initial browser-side implementation for touch-action

content/browser/renderer_host/input/touch_action_filter_unittest.cc

Index: content/browser/renderer_host/input/touch_action_filter_unittest.cc
diff --git a/content/browser/renderer_host/input/touch_action_filter_unittest.cc b/content/browser/renderer_host/input/touch_action_filter_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..dd143b8e3c2e4edc2a2999e0105e375a9bbdb732
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+++ b/content/browser/renderer_host/input/touch_action_filter_unittest.cc
@@ -0,0 +1,100 @@
+// Copyright 2013 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/browser/renderer_host/input/touch_action_filter.h"
+#include "content/browser/renderer_host/input/synthetic_web_input_event_builders.h"
+#include "content/port/browser/event_with_latency_info.h"
+#include "content/port/common/input_event_ack_state.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "third_party/WebKit/public/web/WebInputEvent.h"
+
+using blink::WebGestureEvent;
+using blink::WebInputEvent;
+
+namespace content {
+
+TEST(TouchActionFilterTest, SimpleFilter) {
+  TouchActionFilter filter;
+
+  const WebGestureEvent scroll_begin = SyntheticWebGestureEventBuilder::Build(
+      WebInputEvent::GestureScrollBegin, WebGestureEvent::Touchscreen);
+  const WebGestureEvent scroll_update =
+      SyntheticWebGestureEventBuilder::BuildScrollUpdate(0, 10, 0);
+  const WebGestureEvent scroll_end = SyntheticWebGestureEventBuilder::Build(
+      WebInputEvent::GestureScrollEnd, WebGestureEvent::Touchscreen);
+  const WebGestureEvent tap = SyntheticWebGestureEventBuilder::Build(
+      WebInputEvent::GestureTap, WebGestureEvent::Touchscreen);
+
+  // No events filtered by default.
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_begin));
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_end));
+  EXPECT_FALSE(filter.FilterGestureEvent(tap));
+
+  // TOUCH_ACTION_AUTO doesn't cause any filtering.
+  filter.OnSetTouchAction(TOUCH_ACTION_AUTO);
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_begin));
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_end));
+
+  // TOUCH_ACTION_NONE filters out all scroll events, but no other events.
+  filter.OnSetTouchAction(TOUCH_ACTION_NONE);
+  EXPECT_FALSE(filter.FilterGestureEvent(tap));
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_begin));
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_end));
+
+  // After the end of a gesture the state is reset.
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_begin));
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_end));
+
+  // Setting touch action doesn't impact any in-progress gestures.
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_begin));
+  filter.OnSetTouchAction(TOUCH_ACTION_NONE);
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_end));
+
+  // And the state is still cleared for the next gesture.
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_begin));
+  EXPECT_FALSE(filter.FilterGestureEvent(scroll_end));
+
+  // Changing the touch action during a gesture has no effect.
+  filter.OnSetTouchAction(TOUCH_ACTION_NONE);
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_begin));
+  filter.OnSetTouchAction(TOUCH_ACTION_AUTO);
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_end));
+}
+
+TEST(TouchActionFilterTest, MultiTouch) {
+  TouchActionFilter filter;
+
+  const WebGestureEvent scroll_begin = SyntheticWebGestureEventBuilder::Build(
+      WebInputEvent::GestureScrollBegin, WebGestureEvent::Touchscreen);
+  const WebGestureEvent scroll_update =
+      SyntheticWebGestureEventBuilder::BuildScrollUpdate(0, 10, 0);
+  const WebGestureEvent scrollEnd = SyntheticWebGestureEventBuilder::Build(
+      WebInputEvent::GestureScrollEnd, WebGestureEvent::Touchscreen);
+
+  // For multiple points, the intersection is what matters.
+  filter.OnSetTouchAction(TOUCH_ACTION_NONE);
+  filter.OnSetTouchAction(TOUCH_ACTION_AUTO);
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_begin));
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_TRUE(filter.FilterGestureEvent(scrollEnd));
+
+  filter.OnSetTouchAction(TOUCH_ACTION_AUTO);
+  filter.OnSetTouchAction(TOUCH_ACTION_NONE);
+  filter.OnSetTouchAction(TOUCH_ACTION_AUTO);
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_begin));
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_TRUE(filter.FilterGestureEvent(scroll_update));
+  EXPECT_TRUE(filter.FilterGestureEvent(scrollEnd));
+}
+
+}  // namespace content