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|
// Copyright 2022 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "ui/base/ime/surrounding_text_tracker.h"
#include <string_view>
#include "testing/gtest/include/gtest/gtest.h"
#include "ui/base/ime/composition_text.h"
namespace ui {
TEST(SurroundingTextTracker, StateGetSurroundingTextRange) {
SurroundingTextTracker::State state{u"abcde", /*utf16_offset=*/10,
/*selection=*/gfx::Range(),
/*composition=*/gfx::Range()};
EXPECT_EQ(gfx::Range(10, 15), state.GetSurroundingTextRange());
}
TEST(SurroundingTextTracker, StateGetCompositionText) {
{
SurroundingTextTracker::State state{u"abcde", /*utf16_offset=*/10,
/*selection=*/gfx::Range(),
/*composition=*/gfx::Range()};
// Empty composition range is valid. Empty composition is expected.
EXPECT_EQ(std::u16string_view(), state.GetCompositionText());
}
{
SurroundingTextTracker::State state{u"abcde", /*utf16_offset=*/10,
/*selection=*/gfx::Range(),
/*composition=*/gfx::Range(11, 13)};
EXPECT_EQ(std::u16string_view(u"bc"), state.GetCompositionText());
}
{
SurroundingTextTracker::State state{u"abcde", /*utf16_offset=*/10,
/*selection=*/gfx::Range(),
/*composition=*/gfx::Range(1, 3)};
// Out of the range case.
EXPECT_EQ(std::nullopt, state.GetCompositionText());
}
{
SurroundingTextTracker::State state{u"abcde", /*utf16_offset=*/10,
/*selection=*/gfx::Range(),
/*composition=*/gfx::Range(8, 12)};
// Overlapping but not fully covered case.
EXPECT_EQ(std::nullopt, state.GetCompositionText());
}
}
TEST(SurroundingTextTracker, SetCompositionText) {
SurroundingTextTracker tracker;
ui::CompositionText composition;
composition.text = u"abc";
composition.selection = gfx::Range(3); // at the end.
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"abc", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(3), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(0, 3), tracker.predicted_state().composition);
composition.text = u"xyzw";
composition.selection = gfx::Range(4); // at the end.
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"xyzw", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(4), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(0, 4), tracker.predicted_state().composition);
}
TEST(SurroundingTextTracker, SetCompositionTextWithExistingText) {
SurroundingTextTracker tracker;
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 0u,
gfx::Range(3))); // Set cursor between c and d.
ui::CompositionText composition;
composition.text = u"xyz";
composition.selection = gfx::Range(3); // at the end.
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(6), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(3, 6), tracker.predicted_state().composition);
composition.text = u"pqrst";
composition.selection = gfx::Range(0); // at beginning.
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"abcpqrstdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(3), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(3, 8), tracker.predicted_state().composition);
// If there's selection, that will be replaced by composition.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 0u, gfx::Range(2, 5))); // Select "cde".
composition.text = u"xyz";
composition.selection = gfx::Range(3); // at the end.
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"abxyzfg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(5), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(2, 5), tracker.predicted_state().composition);
// Simple check with offset.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u,
gfx::Range(8))); // Set cursor between c and d.
composition.text = u"xyz";
composition.selection = gfx::Range(3); // at the end.
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(5u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(11), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(8, 11), tracker.predicted_state().composition);
// Selection is before offset.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u,
gfx::Range(3))); // Set cursor before offset.
composition.text = u"xyz";
composition.selection = gfx::Range(3); // at the end
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"xyz", tracker.predicted_state().surrounding_text);
EXPECT_EQ(3u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(6), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(3, 6), tracker.predicted_state().composition);
// Selection ends at the beginning of surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(3, 5)));
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"xyzabcdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(3u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(6), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(3, 6), tracker.predicted_state().composition);
// Selection overlaps with the surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(4, 6)));
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"xyzbcdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(4u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(7), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(4, 7), tracker.predicted_state().composition);
// Selection covers whole surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(4, 13)));
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"xyz", tracker.predicted_state().surrounding_text);
EXPECT_EQ(4u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(7), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(4, 7), tracker.predicted_state().composition);
// Selection begins within the surrounding text, but overflows it.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(11, 13)));
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"abcdefxyz", tracker.predicted_state().surrounding_text);
EXPECT_EQ(5u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(14), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(11, 14), tracker.predicted_state().composition);
// Selection begins at the end of the surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(12, 13)));
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"abcdefgxyz", tracker.predicted_state().surrounding_text);
EXPECT_EQ(5u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(15), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(12, 15), tracker.predicted_state().composition);
// Selection begins after the known surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(13)));
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"xyz", tracker.predicted_state().surrounding_text);
EXPECT_EQ(13u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(16), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(13, 16), tracker.predicted_state().composition);
}
TEST(SurroundingTextTracker, SetCompositionFromExistingText) {
SurroundingTextTracker tracker;
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 0u,
gfx::Range(3))); // Set cursor between c and d.
tracker.OnSetCompositionFromExistingText(gfx::Range(3, 5));
EXPECT_EQ(u"abcdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(3), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(3, 5), tracker.predicted_state().composition);
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u,
gfx::Range(8))); // Set cursor between c and d.
tracker.OnSetCompositionFromExistingText(gfx::Range(8, 10));
EXPECT_EQ(u"abcdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(5u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(8), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(8, 10), tracker.predicted_state().composition);
}
TEST(SurroundingTextTracker, ConfirmCompositionText) {
SurroundingTextTracker tracker;
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 0u,
gfx::Range(3))); // Set cursor between c and d.
ui::CompositionText composition;
composition.text = u"xyz";
composition.selection = gfx::Range(1); // between x and y.
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(4), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(3, 6), tracker.predicted_state().composition);
tracker.OnConfirmCompositionText(/*keep_selection=*/false);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(6), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
// Nothing happens if no composition exists.
tracker.OnConfirmCompositionText(/*keep_selection=*/false);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(6), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
// Check with offset.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u,
gfx::Range(8))); // Set cursor between c and d.
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(5u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(9), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(8, 11), tracker.predicted_state().composition);
tracker.OnConfirmCompositionText(/*keep_selection=*/false);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(5u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(11), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
}
TEST(SurroundingTextTracker, ConfirmCompositionTextWithKeepSelection) {
SurroundingTextTracker tracker;
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 0u,
gfx::Range(3))); // Set cursor between c and d.
ui::CompositionText composition;
composition.text = u"xyz";
composition.selection = gfx::Range(1); // between x and y.
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(4), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(3, 6), tracker.predicted_state().composition);
tracker.OnConfirmCompositionText(/*keep_selection=*/true);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(4), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
// Nothing happens if no composition exists.
tracker.OnConfirmCompositionText(/*keep_selection=*/true);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(4), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
}
TEST(SurroundingTextTracker, ClearCompositionText) {
SurroundingTextTracker tracker;
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 0u,
gfx::Range(3))); // Set cursor between c and d.
ui::CompositionText composition;
composition.text = u"xyz";
composition.selection = gfx::Range(1); // between x and y.
tracker.OnSetCompositionText(composition);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(4), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(3, 6), tracker.predicted_state().composition);
tracker.OnClearCompositionText();
EXPECT_EQ(u"abcdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(3), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
// Set "cd" as composition text.
tracker.OnSetCompositionFromExistingText(gfx::Range(2, 4));
EXPECT_EQ(u"abcdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(3), tracker.predicted_state().selection);
EXPECT_EQ(gfx::Range(2, 4), tracker.predicted_state().composition);
// Then clear it again.
tracker.OnClearCompositionText();
EXPECT_EQ(u"abefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(2), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
// Nothing should happen if there's no composition.
tracker.OnClearCompositionText();
EXPECT_EQ(u"abefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(2), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
// With offset.
// Set composition before the surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u,
gfx::Range(8))); // Set cursor between c and d.
tracker.OnSetCompositionFromExistingText(gfx::Range(2, 4));
tracker.OnClearCompositionText();
EXPECT_EQ(u"abcdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(3u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(2), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
// Composition overlaps with the surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u,
gfx::Range(8))); // Set cursor between c and d.
tracker.OnSetCompositionFromExistingText(gfx::Range(4, 6));
tracker.OnClearCompositionText();
EXPECT_EQ(u"bcdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(4u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(4), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
// Composition covers the whole surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u,
gfx::Range(8))); // Set cursor between c and d.
tracker.OnSetCompositionFromExistingText(gfx::Range(4, 13));
tracker.OnClearCompositionText();
EXPECT_EQ(u"", tracker.predicted_state().surrounding_text);
EXPECT_EQ(4u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(4), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
// Composition overlaps the trailing part of surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u,
gfx::Range(8))); // Set cursor between c and d.
tracker.OnSetCompositionFromExistingText(gfx::Range(11, 13));
tracker.OnClearCompositionText();
EXPECT_EQ(u"abcdef", tracker.predicted_state().surrounding_text);
EXPECT_EQ(5u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(11), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
// Composition is set after the surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u,
gfx::Range(8))); // Set cursor between c and d.
tracker.OnSetCompositionFromExistingText(gfx::Range(13, 15));
tracker.OnClearCompositionText();
EXPECT_EQ(u"abcdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(5u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(13), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
}
TEST(SurroundingTextTracker, InsertText) {
SurroundingTextTracker tracker;
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 0u,
gfx::Range(3))); // Set cursor between c and d.
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(6), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"abcxyzdefg", 0u, gfx::Range(6)));
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 0u,
gfx::Range(3))); // Set cursor between c and d.
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorBeforeText);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(3), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"abcxyzdefg", 0u, gfx::Range(3)));
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 0u,
gfx::Range(3, 4))); // Set selection on "d".
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
EXPECT_EQ(u"abcxyzefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(6), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"abcxyzefg", 0u, gfx::Range(6)));
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 0u,
gfx::Range(3, 4))); // Set selection on "d".
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorBeforeText);
// 'd' should be replaced.
EXPECT_EQ(u"abcxyzefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(0u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(3), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"abcxyzefg", 0u, gfx::Range(3)));
// With offset.
tracker.Reset();
ASSERT_EQ(
SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(8))); // Set cursor after "c"
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
EXPECT_EQ(u"abcxyzdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(5u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(11), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"abcxyzdefg", 5u, gfx::Range(11)));
// Selection is before offset.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(3, 4)));
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
EXPECT_EQ(u"xyz", tracker.predicted_state().surrounding_text);
EXPECT_EQ(3u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(6), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"xyz", 3u, gfx::Range(6)));
// Selection ends at the beginning of the surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(3, 5)));
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
EXPECT_EQ(u"xyzabcdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(3u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(6), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"xyzabcdefg", 3u, gfx::Range(6)));
// Selection overlaps the leading parts of surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(4, 6)));
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
EXPECT_EQ(u"xyzbcdefg", tracker.predicted_state().surrounding_text);
EXPECT_EQ(4u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(7), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"xyzbcdefg", 4u, gfx::Range(7)));
// Selection covers the whole surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(4, 13)));
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
EXPECT_EQ(u"xyz", tracker.predicted_state().surrounding_text);
EXPECT_EQ(4u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(7), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"xyz", 4u, gfx::Range(7)));
// Selection overlaps the trailing part of surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(11, 13)));
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
EXPECT_EQ(u"abcdefxyz", tracker.predicted_state().surrounding_text);
EXPECT_EQ(5u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(14), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"abcdefxyz", 5u, gfx::Range(14)));
// Selection starts wat the end of the surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(12, 13)));
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
EXPECT_EQ(u"abcdefgxyz", tracker.predicted_state().surrounding_text);
EXPECT_EQ(5u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(15), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"abcdefgxyz", 5u, gfx::Range(15)));
// Selection is after the surrounding text.
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(13, 14)));
tracker.OnInsertText(
u"xyz", TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
EXPECT_EQ(u"xyz", tracker.predicted_state().surrounding_text);
EXPECT_EQ(13u, tracker.predicted_state().utf16_offset);
EXPECT_EQ(gfx::Range(16), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"xyz", 13u, gfx::Range(16)));
// Regression test for https://crrev.com/c/5947938
tracker.Reset();
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 5u, gfx::Range(13, 14)));
{
std::u16string s = u"xyz";
tracker.OnInsertText(
s, TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
tracker.OnInsertText(
s, TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText);
}
EXPECT_EQ(SurroundingTextTracker::UpdateResult::kUpdated,
tracker.Update(u"yz", 14u, gfx::Range(16)));
}
TEST(SurroundingTextTracker, InsertTextWithComposition) {
// Aliases to just the test data shorter.
constexpr auto kMoveCursorBeforeText =
TextInputClient::InsertTextCursorBehavior::kMoveCursorBeforeText;
constexpr auto kMoveCursorAfterText =
TextInputClient::InsertTextCursorBehavior::kMoveCursorAfterText;
constexpr struct {
gfx::Range selection;
TextInputClient::InsertTextCursorBehavior cursor_behavior;
const char16_t* expected_surrounding_text;
gfx::Range expected_selection;
} kTestData[] = {
// Cursor between 'a' and 'b'.
{gfx::Range(1), kMoveCursorBeforeText, u"axyzbfg", gfx::Range(1)},
{gfx::Range(1), kMoveCursorAfterText, u"axyzbfg", gfx::Range(4)},
// Selection of 'a'.
{gfx::Range(0, 1), kMoveCursorBeforeText, u"xyzbfg", gfx::Range(0)},
{gfx::Range(0, 1), kMoveCursorAfterText, u"xyzbfg", gfx::Range(3)},
// Selection of "bc" (crossing the starting boundary of the composition).
{gfx::Range(1, 3), kMoveCursorBeforeText, u"axyzfg", gfx::Range(1)},
{gfx::Range(1, 3), kMoveCursorAfterText, u"axyzfg", gfx::Range(4)},
// Cursor between 'c' and 'd' (inside composition).
{gfx::Range(3), kMoveCursorBeforeText, u"abxyzfg", gfx::Range(2)},
{gfx::Range(3), kMoveCursorAfterText, u"abxyzfg", gfx::Range(5)},
// Selection of 'd' (inside composition).
{gfx::Range(3, 4), kMoveCursorBeforeText, u"abxyzfg", gfx::Range(2)},
{gfx::Range(3, 4), kMoveCursorAfterText, u"abxyzfg", gfx::Range(5)},
// Selection of "ef" (crossing the end boundary of the composition).
{gfx::Range(4, 6), kMoveCursorBeforeText, u"abxyzg", gfx::Range(2)},
{gfx::Range(4, 6), kMoveCursorAfterText, u"abxyzg", gfx::Range(5)},
// Cursor between 'f' and 'g'.
{gfx::Range(6), kMoveCursorBeforeText, u"abfxyzg", gfx::Range(3)},
{gfx::Range(6), kMoveCursorAfterText, u"abfxyzg", gfx::Range(6)},
};
for (const auto& test_case : kTestData) {
SurroundingTextTracker tracker;
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", 0u, test_case.selection));
// Set composition on "cde".
tracker.OnSetCompositionFromExistingText(gfx::Range(2, 5));
// Then insert text.
tracker.OnInsertText(u"xyz", test_case.cursor_behavior);
// Verification.
EXPECT_EQ(test_case.expected_surrounding_text,
tracker.predicted_state().surrounding_text);
EXPECT_EQ(test_case.expected_selection,
tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
}
}
TEST(SurroundingTextTracker, ExtendSelectionAndDelete) {
constexpr struct {
size_t utf16_offset;
gfx::Range selection;
gfx::Range composition;
size_t before;
size_t after;
const char16_t* expected_surrounding_text;
size_t expected_utf16_offset;
gfx::Range expected_selection;
} kTestData[] = {
// null deletion.
{0u, gfx::Range(3), gfx::Range(), 0, 0, u"abcdefg", 0u, gfx::Range(3)},
// Remove 1 char before the cursor.
{0u, gfx::Range(3), gfx::Range(), 1, 0, u"abdefg", 0u, gfx::Range(2)},
// Remove 1 char after the cursor.
{0u, gfx::Range(3), gfx::Range(), 0, 1, u"abcefg", 0u, gfx::Range(3)},
// Remove 1 char for each before and after the cursor.
{0u, gfx::Range(3), gfx::Range(), 1, 1, u"abefg", 0u, gfx::Range(2)},
// Selection deletion.
{0u, gfx::Range(3, 4), gfx::Range(), 0, 0, u"abcefg", 0u, gfx::Range(3)},
// Selection deletion with 1 char before.
{0u, gfx::Range(3, 4), gfx::Range(), 1, 0, u"abefg", 0u, gfx::Range(2)},
// Selection deletion with 1 char after.
{0u, gfx::Range(3, 4), gfx::Range(), 0, 1, u"abcfg", 0u, gfx::Range(3)},
// Selection deletion with 1 char for each before and after.
{0u, gfx::Range(3, 4), gfx::Range(), 1, 1, u"abfg", 0u, gfx::Range(2)},
// With composition.
{0u, gfx::Range(2), gfx::Range(3, 4), 0, 0, u"abcefg", 0u, gfx::Range(2)},
// With composition crossing the beginning boundary.
{0u, gfx::Range(1), gfx::Range(2, 5), 0, 2, u"afg", 0u, gfx::Range(1)},
// With composition containing the selection.
{0u, gfx::Range(3, 4), gfx::Range(1, 6), 1, 1, u"ag", 0u, gfx::Range(1)},
// With composition crossing the end boundary.
{0u, gfx::Range(6), gfx::Range(2, 5), 2, 0, u"abg", 0u, gfx::Range(2)},
// With composition covered by selection.
{0u, gfx::Range(3, 4), gfx::Range(2, 5), 2, 2, u"ag", 0u, gfx::Range(1)},
// With offset.
{5u, gfx::Range(8), gfx::Range(), 1, 2, u"abfg", 5u, gfx::Range(7)},
{5u, gfx::Range(3), gfx::Range(), 1, 0, u"abcdefg", 4u, gfx::Range(2)},
{5u, gfx::Range(3), gfx::Range(), 0, 1, u"abcdefg", 4u, gfx::Range(3)},
{5u, gfx::Range(4), gfx::Range(), 0, 2, u"bcdefg", 4u, gfx::Range(4)},
{5u, gfx::Range(13), gfx::Range(), 1, 0, u"abcdefg", 5u, gfx::Range(12)},
{5u, gfx::Range(13), gfx::Range(), 0, 1, u"abcdefg", 5u, gfx::Range(13)},
{5u, gfx::Range(13), gfx::Range(), 2, 0, u"abcdef", 5u, gfx::Range(11)},
};
for (const auto& test_case : kTestData) {
SurroundingTextTracker tracker;
ASSERT_EQ(SurroundingTextTracker::UpdateResult::kReset,
tracker.Update(u"abcdefg", test_case.utf16_offset,
test_case.selection));
if (!test_case.composition.is_empty())
tracker.OnSetCompositionFromExistingText(test_case.composition);
tracker.OnExtendSelectionAndDelete(test_case.before, test_case.after);
EXPECT_EQ(test_case.expected_surrounding_text,
tracker.predicted_state().surrounding_text);
EXPECT_EQ(test_case.expected_utf16_offset,
tracker.predicted_state().utf16_offset);
EXPECT_EQ(test_case.expected_selection,
tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
}
}
TEST(SurroundingTextTracker, CancelCompositionResetsCompositionOnly) {
SurroundingTextTracker tracker;
ui::CompositionText composition;
composition.text = u"abc";
composition.selection = gfx::Range(3); // at the end.
tracker.OnSetCompositionText(composition);
tracker.CancelComposition();
EXPECT_EQ(u"abc", tracker.predicted_state().surrounding_text);
EXPECT_EQ(gfx::Range(3), tracker.predicted_state().selection);
EXPECT_TRUE(tracker.predicted_state().composition.is_empty());
}
} // namespace ui
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