Invalidate caret during paint invalidation

third_party/WebKit/Source/core/paint/BlockPaintInvalidatorTest.cpp

+// Copyright 2017 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 "core/HTMLNames.h"
+#include "core/editing/FrameSelection.h"
+#include "core/frame/FrameView.h"
+#include "core/layout/LayoutTestHelper.h"
+#include "core/layout/LayoutView.h"
+#include "core/page/FocusController.h"
+#include "core/paint/PaintLayer.h"
+#include "platform/graphics/GraphicsLayer.h"
+#include "platform/graphics/paint/RasterInvalidationTracking.h"
+
+namespace blink {
+
+class BlockPaintInvalidatorTest : public RenderingTest {
+ protected:
+  void SetUp() override {
+    RenderingTest::SetUp();
+    enableCompositing();
+  }
+
+  const RasterInvalidationTracking* getRasterInvalidationTracking() const {
+    // TODO(wangxianzhu): Test SPv2.
+    return layoutView()
+        .layer()
+        ->graphicsLayerBacking()
+        ->getRasterInvalidationTracking();
+  }
+
+  FrameSelection& selection() const {
+    return document().view()->frame().selection();
+  }
+
+  const DisplayItemClient& caretDisplayItemClient() const {
+    return selection().caretDisplayItemClientForTesting();
+  }
+
+  Text* appendTextNode(const String& data) {
+    Text* text = document().createTextNode(data);
+    document().body()->appendChild(text);
+    return text;
+  }
+};
+
+TEST_F(BlockPaintInvalidatorTest, CaretPaintInvalidation) {
+  document().body()->setContentEditable("true", ASSERT_NO_EXCEPTION);
+  document().page()->focusController().setActive(true);
+  document().page()->focusController().setFocused(true);
+
+  Text* text = appendTextNode("Hello, World!");
+  document().view()->updateAllLifecyclePhases();
+  const auto* block = toLayoutBlock(document().body()->layoutObject());
+
+  // Focus the body. Should invalidate the new caret.
+  document().view()->setTracksPaintInvalidations(true);
+  document().body()->focus();
+  document().view()->updateAllLifecyclePhases();
+  EXPECT_TRUE(block->shouldPaintCursorCaret());
+
+  LayoutRect caretVisualRect = caretDisplayItemClient().visualRect();
+  EXPECT_EQ(1, caretVisualRect.width());
+  EXPECT_EQ(block->location(), caretVisualRect.location());
+
+  const auto* rasterInvalidations =
+      &getRasterInvalidationTracking()->trackedRasterInvalidations;
+  ASSERT_EQ(1u, rasterInvalidations->size());
+  EXPECT_EQ(enclosingIntRect(caretVisualRect), (*rasterInvalidations)[0].rect);
+  EXPECT_EQ(block, (*rasterInvalidations)[0].client);
+  EXPECT_EQ(PaintInvalidationCaret, (*rasterInvalidations)[0].reason);
+
+  std::unique_ptr<JSONArray> objectInvalidations =
+      document().view()->trackedObjectPaintInvalidationsAsJSON();
+  ASSERT_EQ(1u, objectInvalidations->size());
+  String s;
+  JSONObject::cast(objectInvalidations->at(0))->get("object")->asString(&s);
+  EXPECT_EQ("Caret", s);
+  document().view()->setTracksPaintInvalidations(false);
+
+  // Move the caret to the end of the text. Should invalidate both the old and
+  // new carets.
+  document().view()->setTracksPaintInvalidations(true);
+  selection().setSelection(
+      SelectionInDOMTree::Builder().collapse(Position(text, 5)).build());
+  document().view()->updateAllLifecyclePhases();
+  EXPECT_TRUE(block->shouldPaintCursorCaret());
+
+  LayoutRect newCaretVisualRect = caretDisplayItemClient().visualRect();
+  EXPECT_EQ(caretVisualRect.size(), newCaretVisualRect.size());
+  EXPECT_EQ(caretVisualRect.y(), newCaretVisualRect.y());
+  EXPECT_LT(caretVisualRect.x(), newCaretVisualRect.x());
+
+  rasterInvalidations =
+      &getRasterInvalidationTracking()->trackedRasterInvalidations;
+  ASSERT_EQ(2u, rasterInvalidations->size());
+  EXPECT_EQ(enclosingIntRect(caretVisualRect), (*rasterInvalidations)[0].rect);
+  EXPECT_EQ(block, (*rasterInvalidations)[0].client);
+  EXPECT_EQ(PaintInvalidationCaret, (*rasterInvalidations)[0].reason);
+  EXPECT_EQ(enclosingIntRect(newCaretVisualRect),
+            (*rasterInvalidations)[1].rect);
+  EXPECT_EQ(block, (*rasterInvalidations)[1].client);
+  EXPECT_EQ(PaintInvalidationCaret, (*rasterInvalidations)[1].reason);
+
+  objectInvalidations =
+      document().view()->trackedObjectPaintInvalidationsAsJSON();
+  ASSERT_EQ(1u, objectInvalidations->size());
+  JSONObject::cast(objectInvalidations->at(0))->get("object")->asString(&s);
+  EXPECT_EQ("Caret", s);
+  document().view()->setTracksPaintInvalidations(false);
+
+  // Remove selection. Should invalidate the old caret.
+  LayoutRect oldCaretVisualRect = newCaretVisualRect;
+  document().view()->setTracksPaintInvalidations(true);
+  selection().setSelection(SelectionInDOMTree());
+  document().view()->updateAllLifecyclePhases();
+  EXPECT_FALSE(block->shouldPaintCursorCaret());
+  EXPECT_EQ(LayoutRect(), caretDisplayItemClient().visualRect());
+
+  rasterInvalidations =
+      &getRasterInvalidationTracking()->trackedRasterInvalidations;
+  ASSERT_EQ(1u, rasterInvalidations->size());
+  EXPECT_EQ(enclosingIntRect(oldCaretVisualRect),
+            (*rasterInvalidations)[0].rect);
+  EXPECT_EQ(block, (*rasterInvalidations)[0].client);
+
+  objectInvalidations =
+      document().view()->trackedObjectPaintInvalidationsAsJSON();
+  ASSERT_EQ(1u, objectInvalidations->size());
+  JSONObject::cast(objectInvalidations->at(0))->get("object")->asString(&s);
+  EXPECT_EQ("Caret", s);
+  document().view()->setTracksPaintInvalidations(false);
+}
+
+}  // namespace blink