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// 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 "third_party/blink/renderer/core/layout/layout_text_fragment.h"
#include "third_party/blink/renderer/core/html/html_head_element.h"
#include "third_party/blink/renderer/core/testing/core_unit_test_helper.h"
#include "third_party/blink/renderer/platform/runtime_enabled_features.h"
#include "third_party/blink/renderer/platform/testing/runtime_enabled_features_test_helpers.h"
namespace blink {
class LayoutTextFragmentTest : public RenderingTest {
protected:
void SetUp() override {
RenderingTest::SetUp();
GetDocument().head()->SetInnerHTMLFromString(
"<style>#target::first-letter{color:red}</style>");
}
void SetBasicBody(const char* message) {
SetBodyInnerHTML(String::Format(
"<div id='target' style='font-size: 10px;'>%s</div>", message));
}
void SetAhemBody(const char* message, const unsigned width) {
SetBodyInnerHTML(String::Format(
"<div id='target' style='font: 10px Ahem; width: %uem'>%s</div>", width,
message));
}
const LayoutTextFragment* GetRemainingText() const {
return ToLayoutTextFragment(
GetElementById("target")->firstChild()->GetLayoutObject());
}
const LayoutTextFragment* GetFirstLetter() const {
return ToLayoutTextFragment(
AssociatedLayoutObjectOf(*GetElementById("target")->firstChild(), 0));
}
};
// Helper class to run the same test code with and without LayoutNG
class ParameterizedLayoutTextFragmentTest
: public testing::WithParamInterface<bool>,
private ScopedLayoutNGForTest,
public LayoutTextFragmentTest {
public:
ParameterizedLayoutTextFragmentTest() : ScopedLayoutNGForTest(GetParam()) {}
protected:
bool LayoutNGEnabled() const { return GetParam(); }
};
INSTANTIATE_TEST_SUITE_P(All,
ParameterizedLayoutTextFragmentTest,
testing::Bool());
TEST_P(ParameterizedLayoutTextFragmentTest, Basics) {
SetBasicBody("foo");
EXPECT_EQ(0, GetFirstLetter()->CaretMinOffset());
EXPECT_EQ(1, GetFirstLetter()->CaretMaxOffset());
EXPECT_EQ(1u, GetFirstLetter()->ResolvedTextLength());
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(0));
EXPECT_EQ(0, GetRemainingText()->CaretMinOffset());
EXPECT_EQ(2, GetRemainingText()->CaretMaxOffset());
EXPECT_EQ(2u, GetRemainingText()->ResolvedTextLength());
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(0));
}
TEST_P(ParameterizedLayoutTextFragmentTest, CaretMinMaxOffset) {
SetBasicBody("(f)oo");
EXPECT_EQ(0, GetFirstLetter()->CaretMinOffset());
EXPECT_EQ(3, GetFirstLetter()->CaretMaxOffset());
EXPECT_EQ(0, GetRemainingText()->CaretMinOffset());
EXPECT_EQ(2, GetRemainingText()->CaretMaxOffset());
SetBasicBody(" (f)oo");
EXPECT_EQ(2, GetFirstLetter()->CaretMinOffset());
EXPECT_EQ(5, GetFirstLetter()->CaretMaxOffset());
EXPECT_EQ(0, GetRemainingText()->CaretMinOffset());
EXPECT_EQ(2, GetRemainingText()->CaretMaxOffset());
SetBasicBody("(f)oo ");
EXPECT_EQ(0, GetFirstLetter()->CaretMinOffset());
EXPECT_EQ(3, GetFirstLetter()->CaretMaxOffset());
EXPECT_EQ(0, GetRemainingText()->CaretMinOffset());
EXPECT_EQ(2, GetRemainingText()->CaretMaxOffset());
SetBasicBody(" (f)oo ");
EXPECT_EQ(1, GetFirstLetter()->CaretMinOffset());
EXPECT_EQ(4, GetFirstLetter()->CaretMaxOffset());
EXPECT_EQ(0, GetRemainingText()->CaretMinOffset());
EXPECT_EQ(2, GetRemainingText()->CaretMaxOffset());
}
TEST_P(ParameterizedLayoutTextFragmentTest, CaretMinMaxOffsetSpacesInBetween) {
SetBasicBody("(f) oo");
EXPECT_EQ(0, GetFirstLetter()->CaretMinOffset());
EXPECT_EQ(3, GetFirstLetter()->CaretMaxOffset());
EXPECT_EQ(0, GetRemainingText()->CaretMinOffset());
EXPECT_EQ(4, GetRemainingText()->CaretMaxOffset());
SetBasicBody(" (f) oo");
EXPECT_EQ(2, GetFirstLetter()->CaretMinOffset());
EXPECT_EQ(5, GetFirstLetter()->CaretMaxOffset());
EXPECT_EQ(0, GetRemainingText()->CaretMinOffset());
EXPECT_EQ(4, GetRemainingText()->CaretMaxOffset());
SetBasicBody("(f) oo ");
EXPECT_EQ(0, GetFirstLetter()->CaretMinOffset());
EXPECT_EQ(3, GetFirstLetter()->CaretMaxOffset());
EXPECT_EQ(0, GetRemainingText()->CaretMinOffset());
EXPECT_EQ(4, GetRemainingText()->CaretMaxOffset());
SetBasicBody(" (f) oo ");
EXPECT_EQ(1, GetFirstLetter()->CaretMinOffset());
EXPECT_EQ(4, GetFirstLetter()->CaretMaxOffset());
EXPECT_EQ(0, GetRemainingText()->CaretMinOffset());
EXPECT_EQ(4, GetRemainingText()->CaretMaxOffset());
}
TEST_P(ParameterizedLayoutTextFragmentTest,
CaretMinMaxOffsetCollapsedRemainingText) {
// Tests if the NG implementation matches the legacy behavior that, when the
// remaining text is fully collapsed, its CaretMin/MaxOffset() return 0 and
// FragmentLength().
SetBasicBody("(f) ");
EXPECT_EQ(0, GetFirstLetter()->CaretMinOffset());
EXPECT_EQ(3, GetFirstLetter()->CaretMaxOffset());
EXPECT_EQ(0, GetRemainingText()->CaretMinOffset());
EXPECT_EQ(2, GetRemainingText()->CaretMaxOffset());
SetBasicBody(" (f) ");
EXPECT_EQ(2, GetFirstLetter()->CaretMinOffset());
EXPECT_EQ(5, GetFirstLetter()->CaretMaxOffset());
EXPECT_EQ(0, GetRemainingText()->CaretMinOffset());
EXPECT_EQ(2, GetRemainingText()->CaretMaxOffset());
}
TEST_P(ParameterizedLayoutTextFragmentTest, ResolvedTextLength) {
SetBasicBody("(f)oo");
EXPECT_EQ(3u, GetFirstLetter()->ResolvedTextLength());
EXPECT_EQ(2u, GetRemainingText()->ResolvedTextLength());
SetBasicBody(" (f)oo");
EXPECT_EQ(3u, GetFirstLetter()->ResolvedTextLength());
EXPECT_EQ(2u, GetRemainingText()->ResolvedTextLength());
SetBasicBody("(f)oo ");
EXPECT_EQ(3u, GetFirstLetter()->ResolvedTextLength());
EXPECT_EQ(2u, GetRemainingText()->ResolvedTextLength());
SetBasicBody(" (f)oo ");
EXPECT_EQ(3u, GetFirstLetter()->ResolvedTextLength());
EXPECT_EQ(2u, GetRemainingText()->ResolvedTextLength());
}
TEST_P(ParameterizedLayoutTextFragmentTest, ResolvedTextLengthSpacesInBetween) {
SetBasicBody("(f) oo");
EXPECT_EQ(3u, GetFirstLetter()->ResolvedTextLength());
EXPECT_EQ(3u, GetRemainingText()->ResolvedTextLength());
SetBasicBody(" (f) oo");
EXPECT_EQ(3u, GetFirstLetter()->ResolvedTextLength());
EXPECT_EQ(3u, GetRemainingText()->ResolvedTextLength());
SetBasicBody("(f) oo ");
EXPECT_EQ(3u, GetFirstLetter()->ResolvedTextLength());
EXPECT_EQ(3u, GetRemainingText()->ResolvedTextLength());
SetBasicBody(" (f) oo ");
EXPECT_EQ(3u, GetFirstLetter()->ResolvedTextLength());
EXPECT_EQ(3u, GetRemainingText()->ResolvedTextLength());
}
TEST_P(ParameterizedLayoutTextFragmentTest,
ResolvedTextLengthCollapsedRemainingText) {
SetBasicBody("(f) ");
EXPECT_EQ(3u, GetFirstLetter()->ResolvedTextLength());
EXPECT_EQ(0u, GetRemainingText()->ResolvedTextLength());
SetBasicBody(" (f) ");
EXPECT_EQ(3u, GetFirstLetter()->ResolvedTextLength());
EXPECT_EQ(0u, GetRemainingText()->ResolvedTextLength());
}
TEST_P(ParameterizedLayoutTextFragmentTest, ContainsCaretOffset) {
SetBasicBody("(f)oo");
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(0)); // "|(f)oo"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(1)); // "(|f)oo"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(2)); // "(f|)oo"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(3)); // "(f)|oo"
EXPECT_FALSE(GetFirstLetter()->ContainsCaretOffset(4)); // out of range
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(0)); // "(f)|oo"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(1)); // "(f)o|o"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(2)); // "(f)oo|"
EXPECT_FALSE(GetRemainingText()->ContainsCaretOffset(3)); // out of range
SetBasicBody(" (f)oo");
EXPECT_FALSE(GetFirstLetter()->ContainsCaretOffset(0)); // "| (f)oo"
EXPECT_FALSE(GetFirstLetter()->ContainsCaretOffset(1)); // " | (f)oo"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(2)); // " |(f)oo"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(3)); // " (|f)oo"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(4)); // " (f|)oo"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(5)); // " (f)|oo"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(0)); // " (f)|oo"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(1)); // " (f)o|o"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(2)); // " (f)oo|"
SetBasicBody("(f)oo ");
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(0)); // "|(f)oo "
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(1)); // "(|f)oo "
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(2)); // "(f|)oo "
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(3)); // "(f)|oo "
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(0)); // "(f)|oo "
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(1)); // "(f)o|o "
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(2)); // "(f)oo| "
EXPECT_FALSE(GetRemainingText()->ContainsCaretOffset(3)); // "(f)oo | "
EXPECT_FALSE(GetRemainingText()->ContainsCaretOffset(4)); // "(f)oo |"
SetBasicBody(" (f)oo ");
EXPECT_FALSE(GetFirstLetter()->ContainsCaretOffset(0)); // "| (f)oo "
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(1)); // " |(f)oo "
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(2)); // " (|f)oo "
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(3)); // " (f|)oo "
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(4)); // " (f)|oo "
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(0)); // " (f)|oo "
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(1)); // " (f)o|o "
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(2)); // " (f)oo| "
EXPECT_FALSE(GetRemainingText()->ContainsCaretOffset(3)); // " (f)oo | "
EXPECT_FALSE(GetRemainingText()->ContainsCaretOffset(4)); // " (f)oo |"
}
TEST_P(ParameterizedLayoutTextFragmentTest,
ContainsCaretOffsetSpacesInBetween) {
SetBasicBody("(f) oo");
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(0)); // "|(f) oo"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(1)); // "(|f) oo"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(2)); // "(f|) oo"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(3)); // "(f)| oo"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(0)); // "(f)| oo"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(1)); // "(f) | oo"
EXPECT_FALSE(GetRemainingText()->ContainsCaretOffset(2)); // "(f) | oo"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(3)); // "(f) |oo"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(4)); // "(f) o|o"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(5)); // "(f) oo|"
}
TEST_P(ParameterizedLayoutTextFragmentTest, ContainsCaretOffsetPre) {
SetBodyInnerHTML("<pre id='target'>(f) oo\n</pre>");
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(0)); // "|(f) oo\n"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(1)); // "(|f) oo\n"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(2)); // "(f|) oo\n"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(3)); // "(f)| oo\n"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(0)); // "(f)| oo\n"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(1)); // "(f) | oo\n"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(2)); // "(f) | oo\n"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(3)); // "(f) |oo\n"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(4)); // "(f) o|o\n"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(5)); // "(f) oo|\n"
EXPECT_FALSE(GetRemainingText()->ContainsCaretOffset(6)); // "(f) oo\n|"
}
TEST_P(ParameterizedLayoutTextFragmentTest, ContainsCaretOffsetPreLine) {
SetBodyInnerHTML("<div id='target' style='white-space: pre-line'>F \n \noo");
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(0)); // "|F \n \noo"
EXPECT_TRUE(GetFirstLetter()->ContainsCaretOffset(1)); // "F| \n \noo"
if (LayoutNGEnabled()) {
// Legacy layout doesn't collapse this space correctly.
EXPECT_FALSE(GetRemainingText()->ContainsCaretOffset(0)); // "F| \n \noo"
}
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(1)); // "F |\n \noo"
EXPECT_FALSE(GetRemainingText()->ContainsCaretOffset(2)); // "F \n| \noo"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(3)); // "F \n |\noo"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(4)); // "F \n \n|oo"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(5)); // "F \n \no|o"
EXPECT_TRUE(GetRemainingText()->ContainsCaretOffset(6)); // "F \n \noo|"
}
TEST_P(ParameterizedLayoutTextFragmentTest,
IsBeforeAfterNonCollapsedCharacterNoLineWrap) {
// Basic tests
SetBasicBody("foo");
EXPECT_TRUE(GetFirstLetter()->IsBeforeNonCollapsedCharacter(0)); // "|foo"
EXPECT_TRUE(GetFirstLetter()->IsAfterNonCollapsedCharacter(1)); // "f|oo"
EXPECT_TRUE(GetRemainingText()->IsBeforeNonCollapsedCharacter(0)); // "f|oo"
EXPECT_TRUE(GetRemainingText()->IsAfterNonCollapsedCharacter(2)); // "foo|"
// Return false at layout object end/start, respectively
EXPECT_FALSE(GetFirstLetter()->IsAfterNonCollapsedCharacter(0)); // "|foo"
EXPECT_FALSE(GetFirstLetter()->IsBeforeNonCollapsedCharacter(1)); // "f|oo"
EXPECT_FALSE(GetRemainingText()->IsAfterNonCollapsedCharacter(0)); // "f|oo"
EXPECT_FALSE(GetRemainingText()->IsBeforeNonCollapsedCharacter(2)); // "foo|"
// Consecutive spaces between first letter and remaining text
SetBasicBody("f bar");
EXPECT_TRUE(
GetRemainingText()->IsBeforeNonCollapsedCharacter(0)); // "f| bar"
EXPECT_FALSE(
GetRemainingText()->IsBeforeNonCollapsedCharacter(1)); // "f | bar"
EXPECT_FALSE(
GetRemainingText()->IsBeforeNonCollapsedCharacter(2)); // "f | bar"
EXPECT_TRUE(
GetRemainingText()->IsAfterNonCollapsedCharacter(1)); // "f | bar"
EXPECT_FALSE(
GetRemainingText()->IsAfterNonCollapsedCharacter(2)); // "f | bar"
EXPECT_FALSE(
GetRemainingText()->IsAfterNonCollapsedCharacter(3)); // "f |bar"
// Leading spaces in first letter are collapsed
SetBasicBody(" foo");
EXPECT_FALSE(GetFirstLetter()->IsBeforeNonCollapsedCharacter(0)); // "| foo"
EXPECT_FALSE(GetFirstLetter()->IsBeforeNonCollapsedCharacter(1)); // " | foo"
EXPECT_FALSE(GetFirstLetter()->IsAfterNonCollapsedCharacter(1)); // " | foo"
EXPECT_FALSE(GetFirstLetter()->IsAfterNonCollapsedCharacter(2)); // " |foo"
// Trailing spaces in remaining text, when at the end of block, are collapsed
SetBasicBody("foo ");
EXPECT_FALSE(
GetRemainingText()->IsBeforeNonCollapsedCharacter(2)); // "foo| "
EXPECT_FALSE(
GetRemainingText()->IsBeforeNonCollapsedCharacter(3)); // "foo | "
EXPECT_FALSE(
GetRemainingText()->IsAfterNonCollapsedCharacter(3)); // "foo | "
EXPECT_FALSE(GetRemainingText()->IsAfterNonCollapsedCharacter(4)); // "foo |"
// Non-collapsed space at remaining text end
SetBasicBody("foo <span>bar</span>");
EXPECT_TRUE(GetRemainingText()->IsBeforeNonCollapsedCharacter(
2)); // "foo| <span>bar</span>"
EXPECT_TRUE(GetRemainingText()->IsAfterNonCollapsedCharacter(
3)); // "foo |<span>bar</span>"
// Non-collapsed space as remaining text
SetBasicBody("f <span>bar</span>");
EXPECT_TRUE(GetRemainingText()->IsBeforeNonCollapsedCharacter(
0)); // "f| <span>bar</span>"
EXPECT_TRUE(GetRemainingText()->IsAfterNonCollapsedCharacter(
1)); // "f |<span>bar</span>"
// Legacy layout fails in the remaining test case
if (!LayoutNGEnabled())
return;
// Collapsed space as remaining text
SetBasicBody("f <br>");
EXPECT_FALSE(
GetRemainingText()->IsBeforeNonCollapsedCharacter(0)); // "f| <br>"
EXPECT_FALSE(
GetRemainingText()->IsAfterNonCollapsedCharacter(1)); // "f |<br>"
}
TEST_P(ParameterizedLayoutTextFragmentTest,
IsBeforeAfterNonCollapsedLineWrapSpace) {
LoadAhem();
// Line wrapping in the middle of remaining text
SetAhemBody("xx xx", 2);
EXPECT_TRUE(
GetRemainingText()->IsBeforeNonCollapsedCharacter(1)); // "xx| xx"
EXPECT_TRUE(GetRemainingText()->IsAfterNonCollapsedCharacter(2)); // "xx |xx"
// Legacy layout fails in the remaining test cases
if (!LayoutNGEnabled())
return;
// Line wrapping at remaining text start
SetAhemBody("(x xx", 2);
EXPECT_TRUE(
GetRemainingText()->IsBeforeNonCollapsedCharacter(0)); // "(x| xx"
EXPECT_TRUE(GetRemainingText()->IsAfterNonCollapsedCharacter(1)); // "(x |xx"
// Line wrapping at remaining text end
SetAhemBody("xx <span>xx</span>", 2);
EXPECT_TRUE(GetRemainingText()->IsBeforeNonCollapsedCharacter(
1)); // "xx| <span>xx</span>"
EXPECT_TRUE(GetRemainingText()->IsAfterNonCollapsedCharacter(
2)); // "xx |<span>xx</span>"
// Entire remaining text as line wrapping
SetAhemBody("(x <span>xx</span>", 2);
EXPECT_TRUE(GetRemainingText()->IsBeforeNonCollapsedCharacter(
0)); // "(x| <span>xx</span>"
EXPECT_TRUE(GetRemainingText()->IsAfterNonCollapsedCharacter(
1)); // "(x |<span>xx</span>"
}
} // namespace blink
|
