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// Copyright 2015 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/editing/iterators/simplified_backwards_text_iterator.h"
#include "third_party/blink/renderer/core/editing/ephemeral_range.h"
#include "third_party/blink/renderer/core/editing/selection_template.h"
#include "third_party/blink/renderer/core/editing/testing/editing_test_base.h"
#include "third_party/blink/renderer/platform/wtf/text/string_builder.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
namespace blink {
namespace simplified_backwards_text_iterator_test {
TextIteratorBehavior EmitsSmallXForTextSecurityBehavior() {
return TextIteratorBehavior::Builder()
.SetEmitsSmallXForTextSecurity(true)
.Build();
}
class SimplifiedBackwardsTextIteratorTest : public EditingTestBase {
protected:
std::string ExtractStringInRange(
const std::string selection_text,
const TextIteratorBehavior& behavior = TextIteratorBehavior()) {
const SelectionInDOMTree selection = SetSelectionTextToBody(selection_text);
StringBuilder builder;
bool is_first = true;
for (SimplifiedBackwardsTextIterator iterator(selection.ComputeRange(),
behavior);
!iterator.AtEnd(); iterator.Advance()) {
if (!is_first)
builder.Append(", ", 2);
is_first = false;
builder.Append(iterator.GetTextState().GetTextForTesting());
}
return builder.ToString().Utf8();
}
};
template <typename Strategy>
static String ExtractString(const Element& element) {
const EphemeralRangeTemplate<Strategy> range =
EphemeralRangeTemplate<Strategy>::RangeOfContents(element);
String result;
for (SimplifiedBackwardsTextIteratorAlgorithm<Strategy> it(range);
!it.AtEnd(); it.Advance()) {
result = it.GetTextState().GetTextForTesting() + result;
}
return result;
}
TEST_F(SimplifiedBackwardsTextIteratorTest, IterateWithFirstLetterPart) {
InsertStyleElement("p::first-letter {font-size: 200%}");
// TODO(editing-dev): |SimplifiedBackwardsTextIterator| should not account
// collapsed whitespace (http://crbug.com/760428)
// Simulate PreviousBoundary()
EXPECT_EQ(" , \n", ExtractStringInRange("^<p> |[(3)]678</p>"));
EXPECT_EQ(" [, \n", ExtractStringInRange("^<p> [|(3)]678</p>"));
EXPECT_EQ(" [(, \n", ExtractStringInRange("^<p> [(|3)]678</p>"));
EXPECT_EQ(" [(3, \n", ExtractStringInRange("^<p> [(3|)]678</p>"));
EXPECT_EQ(" [(3), \n", ExtractStringInRange("^<p> [(3)|]678</p>"));
EXPECT_EQ(" [(3)], \n", ExtractStringInRange("^<p> [(3)]|678</p>"));
EXPECT_EQ("6, [(3)], \n, ab", ExtractStringInRange("^ab<p> [(3)]6|78</p>"))
<< "From remaining part to outside";
EXPECT_EQ("(3)", ExtractStringInRange("<p> [^(3)|]678</p>"))
<< "Iterate in first-letter part";
EXPECT_EQ("67, (3)]", ExtractStringInRange("<p> [^(3)]67|8</p>"))
<< "From remaining part to first-letter part";
EXPECT_EQ("789", ExtractStringInRange("<p> [(3)]6^789|a</p>"))
<< "Iterate in remaining part";
EXPECT_EQ("9, \n, 78", ExtractStringInRange("<p> [(3)]6^78</p>9|a"))
<< "Enter into remaining part and stop in remaining part";
EXPECT_EQ("9, \n, 678, (3)]", ExtractStringInRange("<p> [^(3)]678</p>9|a"))
<< "Enter into remaining part and stop in first-letter part";
}
TEST_F(SimplifiedBackwardsTextIteratorTest, Basic) {
SetBodyContent("<p> [(3)]678</p>");
const Element* const sample = GetDocument().QuerySelector("p");
SimplifiedBackwardsTextIterator iterator(EphemeralRange(
Position(sample->firstChild(), 0), Position(sample->firstChild(), 9)));
// TODO(editing-dev): |SimplifiedBackwardsTextIterator| should not account
// collapsed whitespace (http://crbug.com/760428)
EXPECT_EQ(9, iterator.length())
<< "We should have 8 as ignoring collapsed whitespace.";
EXPECT_EQ(Position(sample->firstChild(), 0), iterator.StartPosition());
EXPECT_EQ(Position(sample->firstChild(), 9), iterator.EndPosition());
EXPECT_EQ(sample->firstChild(), iterator.StartContainer());
EXPECT_EQ(9, iterator.EndOffset());
EXPECT_EQ(sample->firstChild(), iterator.GetNode());
EXPECT_EQ('8', iterator.CharacterAt(0));
EXPECT_EQ('7', iterator.CharacterAt(1));
EXPECT_EQ('6', iterator.CharacterAt(2));
EXPECT_EQ(']', iterator.CharacterAt(3));
EXPECT_EQ(')', iterator.CharacterAt(4));
EXPECT_EQ('3', iterator.CharacterAt(5));
EXPECT_EQ('(', iterator.CharacterAt(6));
EXPECT_EQ('[', iterator.CharacterAt(7));
EXPECT_EQ(' ', iterator.CharacterAt(8));
EXPECT_FALSE(iterator.AtEnd());
iterator.Advance();
EXPECT_TRUE(iterator.AtEnd());
}
TEST_F(SimplifiedBackwardsTextIteratorTest, FirstLetter) {
SetBodyContent(
"<style>p::first-letter {font-size: 200%}</style>"
"<p> [(3)]678</p>");
const Element* const sample = GetDocument().QuerySelector("p");
SimplifiedBackwardsTextIterator iterator(EphemeralRange(
Position(sample->firstChild(), 0), Position(sample->firstChild(), 9)));
EXPECT_EQ(3, iterator.length());
EXPECT_EQ(Position(sample->firstChild(), 6), iterator.StartPosition());
EXPECT_EQ(Position(sample->firstChild(), 9), iterator.EndPosition());
EXPECT_EQ(sample->firstChild(), iterator.StartContainer());
EXPECT_EQ(9, iterator.EndOffset());
EXPECT_EQ(sample->firstChild(), iterator.GetNode());
EXPECT_EQ('8', iterator.CharacterAt(0));
EXPECT_EQ('7', iterator.CharacterAt(1));
EXPECT_EQ('6', iterator.CharacterAt(2));
iterator.Advance();
// TODO(editing-dev): |SimplifiedBackwardsTextIterator| should not account
// collapsed whitespace (http://crbug.com/760428)
EXPECT_EQ(6, iterator.length())
<< "We should have 5 as ignoring collapsed whitespace.";
EXPECT_EQ(Position(sample->firstChild(), 0), iterator.StartPosition());
EXPECT_EQ(Position(sample->firstChild(), 6), iterator.EndPosition());
EXPECT_EQ(sample->firstChild(), iterator.StartContainer());
EXPECT_EQ(6, iterator.EndOffset());
EXPECT_EQ(sample->firstChild(), iterator.GetNode());
EXPECT_EQ(']', iterator.CharacterAt(0));
EXPECT_EQ(')', iterator.CharacterAt(1));
EXPECT_EQ('3', iterator.CharacterAt(2));
EXPECT_EQ('(', iterator.CharacterAt(3));
EXPECT_EQ('[', iterator.CharacterAt(4));
EXPECT_EQ(' ', iterator.CharacterAt(5));
EXPECT_FALSE(iterator.AtEnd());
iterator.Advance();
EXPECT_TRUE(iterator.AtEnd());
}
TEST_F(SimplifiedBackwardsTextIteratorTest, SubrangeWithReplacedElements) {
static const char* body_content =
"<a id=host><b id=one>one</b> not appeared <b id=two>two</b></a>";
const char* shadow_content =
"three <content select=#two></content> <content select=#one></content> "
"zero";
SetBodyContent(body_content);
SetShadowContent(shadow_content, "host");
Element* host = GetDocument().getElementById("host");
// We should not apply DOM tree version to containing shadow tree in
// general. To record current behavior, we have this test. even if it
// isn't intuitive.
EXPECT_EQ("onetwo", ExtractString<EditingStrategy>(*host));
EXPECT_EQ("three two one zero",
ExtractString<EditingInFlatTreeStrategy>(*host));
}
TEST_F(SimplifiedBackwardsTextIteratorTest, characterAt) {
const char* body_content =
"<a id=host><b id=one>one</b> not appeared <b id=two>two</b></a>";
const char* shadow_content =
"three <content select=#two></content> <content select=#one></content> "
"zero";
SetBodyContent(body_content);
SetShadowContent(shadow_content, "host");
Element* host = GetDocument().getElementById("host");
EphemeralRangeTemplate<EditingStrategy> range1(
EphemeralRangeTemplate<EditingStrategy>::RangeOfContents(*host));
SimplifiedBackwardsTextIteratorAlgorithm<EditingStrategy> back_iter1(range1);
const char* message1 =
"|backIter1| should emit 'one' and 'two' in reverse order.";
EXPECT_EQ('o', back_iter1.CharacterAt(0)) << message1;
EXPECT_EQ('w', back_iter1.CharacterAt(1)) << message1;
EXPECT_EQ('t', back_iter1.CharacterAt(2)) << message1;
back_iter1.Advance();
EXPECT_EQ('e', back_iter1.CharacterAt(0)) << message1;
EXPECT_EQ('n', back_iter1.CharacterAt(1)) << message1;
EXPECT_EQ('o', back_iter1.CharacterAt(2)) << message1;
EphemeralRangeTemplate<EditingInFlatTreeStrategy> range2(
EphemeralRangeTemplate<EditingInFlatTreeStrategy>::RangeOfContents(
*host));
SimplifiedBackwardsTextIteratorAlgorithm<EditingInFlatTreeStrategy>
back_iter2(range2);
const char* message2 =
"|backIter2| should emit 'three ', 'two', ' ', 'one' and ' zero' in "
"reverse order.";
EXPECT_EQ('o', back_iter2.CharacterAt(0)) << message2;
EXPECT_EQ('r', back_iter2.CharacterAt(1)) << message2;
EXPECT_EQ('e', back_iter2.CharacterAt(2)) << message2;
EXPECT_EQ('z', back_iter2.CharacterAt(3)) << message2;
EXPECT_EQ(' ', back_iter2.CharacterAt(4)) << message2;
back_iter2.Advance();
EXPECT_EQ('e', back_iter2.CharacterAt(0)) << message2;
EXPECT_EQ('n', back_iter2.CharacterAt(1)) << message2;
EXPECT_EQ('o', back_iter2.CharacterAt(2)) << message2;
back_iter2.Advance();
EXPECT_EQ(' ', back_iter2.CharacterAt(0)) << message2;
back_iter2.Advance();
EXPECT_EQ('o', back_iter2.CharacterAt(0)) << message2;
EXPECT_EQ('w', back_iter2.CharacterAt(1)) << message2;
EXPECT_EQ('t', back_iter2.CharacterAt(2)) << message2;
back_iter2.Advance();
EXPECT_EQ(' ', back_iter2.CharacterAt(0)) << message2;
EXPECT_EQ('e', back_iter2.CharacterAt(1)) << message2;
EXPECT_EQ('e', back_iter2.CharacterAt(2)) << message2;
EXPECT_EQ('r', back_iter2.CharacterAt(3)) << message2;
EXPECT_EQ('h', back_iter2.CharacterAt(4)) << message2;
EXPECT_EQ('t', back_iter2.CharacterAt(5)) << message2;
}
TEST_F(SimplifiedBackwardsTextIteratorTest, TextSecurity) {
InsertStyleElement("s {-webkit-text-security:disc;}");
EXPECT_EQ("baz, xxx, abc",
ExtractStringInRange("^abc<s>foo</s>baz|",
EmitsSmallXForTextSecurityBehavior()));
// E2 80 A2 is U+2022 BULLET
EXPECT_EQ("baz, \xE2\x80\xA2\xE2\x80\xA2\xE2\x80\xA2, abc",
ExtractStringInRange("^abc<s>foo</s>baz|", TextIteratorBehavior()));
}
} // namespace simplified_backwards_text_iterator_test
} // namespace blink
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