Add support for calculating the position of the top controls in the cc layer.

cc/top_controls_manager_unittest.cc

Index: cc/top_controls_manager_unittest.cc
diff --git a/cc/top_controls_manager_unittest.cc b/cc/top_controls_manager_unittest.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d081042f99404c05904bbdb2b988023f4de5de5d
--- /dev/null
+++ b/cc/top_controls_manager_unittest.cc
@@ -0,0 +1,203 @@
+// 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 "cc/top_controls_manager.h"
+
+#include "base/memory/scoped_ptr.h"
+#include "base/time.h"
+#include "cc/layer_impl.h"
+#include "cc/layer_tree_impl.h"
+#include "cc/test/fake_impl_proxy.h"
+#include "cc/test/fake_layer_tree_host_impl.h"
+#include "cc/top_controls_manager_client.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "ui/gfx/vector2d_f.h"
+
+namespace cc {
+namespace {
+
+static const float kTopControlsHeight = 100;
+
+class MockTopControlsManagerClient : public TopControlsManagerClient {
+ public:
+  MockTopControlsManagerClient()
+      : host_impl_(&proxy_),
+        redraw_needed_(false),
+        update_draw_properties_needed_(false) {
+    active_tree_ = LayerTreeImpl::create(&host_impl_);
+    root_scroll_layer_ = LayerImpl::create(active_tree_.get(), 1);
+    active_tree_->set_root_scroll_layer(root_scroll_layer_.get());
+  }
+
+  virtual ~MockTopControlsManagerClient() {}
+
+  virtual void setNeedsRedraw() OVERRIDE {
+    redraw_needed_ = true;
+  }
+
+  virtual void setNeedsUpdateDrawProperties() OVERRIDE {
+    update_draw_properties_needed_ = true;
+  }
+
+  virtual LayerTreeImpl* activeTree() OVERRIDE {
+    return active_tree_.get();
+  }
+
+  TopControlsManager* manager() {
+    if (!manager_)
+      manager_ = TopControlsManager::Create(this, kTopControlsHeight);
+    return manager_.get();
+  }
+
+  LayerImpl* rootScrollLayer() {
+    return root_scroll_layer_.get();
+  }
+
+ private:
+  FakeImplProxy proxy_;
+  FakeLayerTreeHostImpl host_impl_;
+  scoped_ptr<LayerTreeImpl> active_tree_;
+  scoped_ptr<LayerImpl> root_scroll_layer_;
+  scoped_ptr<TopControlsManager> manager_;
+  bool redraw_needed_;
+  bool update_draw_properties_needed_;
+};
+
+TEST(TopControlsManagerTest, overlayModeDetection) {
+  MockTopControlsManagerClient client;
+  TopControlsManager* manager = client.manager();
+  client.rootScrollLayer()->setScrollDelta(gfx::Vector2dF(0.f, 0.f));
+
+  gfx::Vector2dF remaining_scroll = manager->ScrollBy(
+      gfx::Vector2dF(0.f, 30.f));
+  EXPECT_EQ(0.f, remaining_scroll.y());
+  EXPECT_EQ(-30.f, manager->controls_top_offset());
+  EXPECT_EQ(70.f, manager->content_top_offset());
+  EXPECT_FALSE(manager->is_overlay_mode());
+  client.rootScrollLayer()->setScrollDelta(
+      client.rootScrollLayer()->scrollDelta() + remaining_scroll);
+
+  remaining_scroll = manager->ScrollBy(gfx::Vector2dF(0.f, 69.f));
+  EXPECT_EQ(0.f, remaining_scroll.y());
+  EXPECT_EQ(-99.f, manager->controls_top_offset());
+  EXPECT_EQ(1.f, manager->content_top_offset());
+  EXPECT_FALSE(manager->is_overlay_mode());
+  client.rootScrollLayer()->setScrollDelta(
+      client.rootScrollLayer()->scrollDelta() + remaining_scroll);
+
+  remaining_scroll = manager->ScrollBy(gfx::Vector2dF(0.f, -20.f));
+  EXPECT_EQ(0.f, remaining_scroll.y());
+  EXPECT_EQ(-79.f, manager->controls_top_offset());
+  EXPECT_EQ(21.f, manager->content_top_offset());
+  EXPECT_FALSE(manager->is_overlay_mode());
+  client.rootScrollLayer()->setScrollDelta(
+      client.rootScrollLayer()->scrollDelta() + remaining_scroll);
+
+  // Scroll to the toggle point
+  remaining_scroll = manager->ScrollBy(gfx::Vector2dF(0.f, 21.f));
+  EXPECT_EQ(0.f, remaining_scroll.y());
+  EXPECT_EQ(-100.f, manager->controls_top_offset());
+  EXPECT_EQ(0.f, manager->content_top_offset());
+  EXPECT_FALSE(manager->is_overlay_mode());
+  client.rootScrollLayer()->setScrollDelta(
+      client.rootScrollLayer()->scrollDelta() + remaining_scroll);
+
+  remaining_scroll = manager->ScrollBy(gfx::Vector2dF(0.f, 1.f));
+  EXPECT_EQ(1.f, remaining_scroll.y());
+  EXPECT_EQ(-100.f, manager->controls_top_offset());
+  EXPECT_EQ(0.f, manager->content_top_offset());
+  EXPECT_TRUE(manager->is_overlay_mode());
+  client.rootScrollLayer()->setScrollDelta(
+      client.rootScrollLayer()->scrollDelta() + remaining_scroll);
+
+  remaining_scroll = manager->ScrollBy(gfx::Vector2dF(0.f, -1.f));
+  EXPECT_EQ(-1.f, remaining_scroll.y());
+  EXPECT_EQ(-99.f, manager->controls_top_offset());
+  EXPECT_EQ(0.f, manager->content_top_offset());
+  EXPECT_TRUE(manager->is_overlay_mode());
+  client.rootScrollLayer()->setScrollDelta(
+      client.rootScrollLayer()->scrollDelta() + remaining_scroll);
+
+  remaining_scroll = manager->ScrollBy(gfx::Vector2dF(0.f, -50.f));
+  EXPECT_EQ(-50.f, remaining_scroll.y());
+  EXPECT_EQ(-49.f, manager->controls_top_offset());
+  EXPECT_EQ(50.f, manager->content_top_offset());
+  EXPECT_FALSE(manager->is_overlay_mode());
+  client.rootScrollLayer()->setScrollDelta(
+      client.rootScrollLayer()->scrollDelta() + remaining_scroll);
+
+  remaining_scroll = manager->ScrollBy(gfx::Vector2dF(0.f, -50.f));
+  EXPECT_EQ(0.f, manager->controls_top_offset());
+  EXPECT_EQ(100.f, manager->content_top_offset());
+  EXPECT_FALSE(manager->is_overlay_mode());
+  client.rootScrollLayer()->setScrollDelta(
+      client.rootScrollLayer()->scrollDelta() + remaining_scroll);
+}
+
+TEST(TopControlsManagerTest, partialShownHideAnimation) {
+  MockTopControlsManagerClient client;
+  TopControlsManager* manager = client.manager();
+  client.rootScrollLayer()->setScrollOffset(gfx::Vector2d(0, 300));
+  manager->ScrollBy(gfx::Vector2dF(0.f, 300.f));
+  EXPECT_EQ(-100.f, manager->controls_top_offset());
+  EXPECT_EQ(0.f, manager->content_top_offset());
+  EXPECT_TRUE(manager->is_overlay_mode());
+
+  client.rootScrollLayer()->setScrollOffset(gfx::Vector2d(0, 270));
+  manager->ScrollBy(gfx::Vector2dF(0.f, -15.f));
+  EXPECT_EQ(-85.f, manager->controls_top_offset());
+  EXPECT_EQ(0.f, manager->content_top_offset());
+  EXPECT_TRUE(manager->is_overlay_mode());
+
+  manager->ScrollEnd();
+  EXPECT_TRUE(manager->animation());
+
+  base::TimeTicks time = base::TimeTicks::Now();
+  float previous_offset = manager->controls_top_offset();
+  while(manager->animation()) {
+    time = base::TimeDelta::FromMicroseconds(100) + time;
+    manager->Animate(time);
+    EXPECT_LT(manager->controls_top_offset(), previous_offset);
+    previous_offset = manager->controls_top_offset();
+  }
+  EXPECT_FALSE(manager->animation());
+  EXPECT_EQ(-100.f, manager->controls_top_offset());
+  EXPECT_EQ(0.f, manager->content_top_offset());
+  EXPECT_TRUE(manager->is_overlay_mode());
+}
+
+TEST(TopControlsManagerTest, partialShownShowAnimation) {
+  MockTopControlsManagerClient client;
+  TopControlsManager* manager = client.manager();
+  client.rootScrollLayer()->setScrollOffset(gfx::Vector2d(0, 300));
+  manager->ScrollBy(gfx::Vector2dF(0.f, 300.f));
+  EXPECT_EQ(-100.f, manager->controls_top_offset());
+  EXPECT_EQ(0.f, manager->content_top_offset());
+  EXPECT_TRUE(manager->is_overlay_mode());
+
+  client.rootScrollLayer()->setScrollOffset(gfx::Vector2d(0, 230));
+  manager->ScrollBy(gfx::Vector2dF(0.f, -70.f));
+  EXPECT_EQ(-30.f, manager->controls_top_offset());
+  EXPECT_EQ(0.f, manager->content_top_offset());
+  EXPECT_TRUE(manager->is_overlay_mode());
+
+  manager->ScrollEnd();
+  EXPECT_TRUE(manager->animation());
+
+  base::TimeTicks time = base::TimeTicks::Now();
+  float previous_offset = manager->controls_top_offset();
+  while(manager->animation()) {
+    time = base::TimeDelta::FromMicroseconds(100) + time;
+    manager->Animate(time);
+    EXPECT_GT(manager->controls_top_offset(), previous_offset);
+    previous_offset = manager->controls_top_offset();
+  }
+  EXPECT_FALSE(manager->animation());
+  EXPECT_EQ(0.f, manager->controls_top_offset());
+  EXPECT_EQ(0.f, manager->content_top_offset());
+  EXPECT_TRUE(manager->is_overlay_mode());
+}
+
+}  // namespace
+}  // namespace cc