Files
msime-windows/engine/core/input_session_composition.cpp
T
Jia Sui e64195731e feat(server): Backspace 删空剩余拼音后退选已选分词(#35)
已选分词是造词中间态:删空剩余拼音时不再整条 composition 丢弃,
而是退选最后一段并恢复其原始拼音与候选。

engine:
- SelectionTransition 暴露本次选择消费掉的原始输入(保留大小写与双拼按键)
engine/contracts:
- 新增回复类型 CompositionRestored=14 与能力位 CompositionRestore;
  MaxKnown 同步抬高,Server 按协商能力位门控发送,旧 DLL 不会收到未知帧
server:
- 造词中间态压 (consumed_raw, previous_creating_word) 快照,边界 Backspace 弹栈退选
- 任何清空 raw 的路径同时清 creating_word 与快照历史,避免跨 composition 泄漏
windows:
- _HandleCompositionBackspace 提示退选时读回包重建 keystroke buffer / word / 预编辑 / 光标
- NeedToCreateWord 与 CompositionRestored 共用载荷解析;旧 Server 与 UiLess 回退旧行为

Closes #35
2026-09-17 18:45:01 +08:00

782 lines
29 KiB
C++

#include "input_session.h"
#include "../common/helpcode_utils.h"
#include "../quanpin/quanpin_utils.h"
#include "../shuangpin/shuangpin_query.h"
#include "../shuangpin/shuangpin_utils.h"
#include "../japanese/romaji_converter.h"
#include <algorithm>
#include <cctype>
namespace metasequoia
{
namespace
{
std::string remove_delimiters(const std::string &segmented)
{
std::string normalized;
normalized.reserve(segmented.size());
for (const char ch : segmented)
{
if (ch != '\'')
{
normalized.push_back(ch);
}
}
return normalized;
}
void remove_consumed_leading_separators(std::string &raw_input, std::string &raw_input_with_cases)
{
size_t count = 0;
while (count < raw_input.size() && raw_input[count] == '\'')
{
++count;
}
raw_input.erase(0, count);
count = 0;
while (count < raw_input_with_cases.size() && raw_input_with_cases[count] == '\'')
{
++count;
}
raw_input_with_cases.erase(0, count);
}
std::string normalize_canonical_pinyin_for_word(const std::string &pinyin, const std::string &word)
{
if (pinyin.empty())
{
return {};
}
const auto segments = quanpin::split_segments(pinyin);
if (segments.empty() || segments.size() != HelpcodeUtils::count_han_chars(word))
{
return {};
}
for (const auto &segment : segments)
{
if (segment.empty() || !quanpin::is_complete_pinyin_input(segment))
{
return {};
}
}
return quanpin::join_segments(segments);
}
std::string append_canonical_pinyin(const std::string &prefix, const std::string &suffix)
{
if (prefix.empty())
{
return suffix;
}
if (suffix.empty())
{
return {};
}
return prefix + "'" + suffix;
}
struct ShuangpinCompositionBase
{
std::string raw_input;
std::string raw_input_with_cases;
std::string effective_raw_input;
std::string effective_raw_input_with_cases;
size_t helpcode_length = 0;
};
ShuangpinCompositionBase ResolveShuangpinCompositionBase(const QueryRequest &request, const ShuangpinProfile &profile)
{
ShuangpinCompositionBase base{
request.raw_input, request.raw_input_with_cases.empty() ? request.raw_input : request.raw_input_with_cases};
base.effective_raw_input = shuangpin::remove_manual_delimiters(base.raw_input);
base.effective_raw_input_with_cases = shuangpin::remove_manual_delimiters(base.raw_input_with_cases);
if (!request.enable_shuangpin_helpcode || base.effective_raw_input.empty())
{
return base;
}
const auto has_complete_unseparated_base = [&](size_t helpcode_length) {
if (base.effective_raw_input.size() <= helpcode_length)
{
return false;
}
const size_t pure_length = base.effective_raw_input.size() - helpcode_length;
const size_t raw_prefix_length = shuangpin::raw_length_for_effective_prefix(base.raw_input, pure_length);
// An apostrophe immediately before the suffix makes that suffix a
// user-defined pinyin segment, not an auxiliary code.
if (raw_prefix_length < base.raw_input.size() && base.raw_input[raw_prefix_length] == '\'')
{
return false;
}
return shuangpin::is_complete_input(base.raw_input.substr(0, raw_prefix_length), profile);
};
if (shuangpin::detect_active_double_helpcode_length(base.raw_input, base.raw_input_with_cases, profile) == 2)
{
base.helpcode_length = 2;
return base;
}
if (base.effective_raw_input.size() % 2 == 1 && base.effective_raw_input.size() > 1)
{
if (has_complete_unseparated_base(1))
{
base.helpcode_length = 1;
}
}
return base;
}
bool HasActiveQuanpinHelpcode(const QueryRequest &request)
{
return request.enable_quanpin_helpcode &&
quanpin::detect_active_helpcode_length(request.raw_input, request.raw_input_with_cases) > 0;
}
std::string ResolveShuangpinCloudCacheKey(const QueryRequest &request, const ShuangpinProfile &profile)
{
const auto base = ResolveShuangpinCompositionBase(request, profile);
if (base.helpcode_length > 0 && base.effective_raw_input.size() >= base.helpcode_length)
{
const size_t base_length = base.effective_raw_input.size() - base.helpcode_length;
return base.raw_input.substr(0, shuangpin::raw_length_for_effective_prefix(base.raw_input, base_length));
}
return base.raw_input;
}
std::string ResolveQuanpinCloudCacheKey(const QueryRequest &request)
{
return quanpin::strip_active_helpcodes(request.raw_input, request.raw_input_with_cases);
}
// Same four-bit mapping as autocorrect_types_from_request (engine.cpp): the
// request only carries the two legacy bools, and either one on also enables
// deletion and insertion so the preedit rebuild sees the same correction space
// as the query.
unsigned QuanpinAutocorrectTypes(const QueryRequest &request)
{
const unsigned legacy =
(request.enable_quanpin_autocorrect_transposition ? quanpin::kAutocorrectTransposition : 0u) |
(request.enable_quanpin_autocorrect_neighbor ? quanpin::kAutocorrectNeighbor : 0u);
return legacy == 0 ? 0u : legacy | quanpin::kAutocorrectDeletion | quanpin::kAutocorrectInsertion;
}
std::string QuanpinLettersWithoutDelimiters(const std::string &text)
{
std::string letters;
letters.reserve(text.size());
for (const char ch : text)
{
if (ch != '\'')
{
letters.push_back(ch);
}
}
return letters;
}
// Folds letters for autocorrect display comparisons: lowercases and strips
// manual delimiters, and maps the u-umlaut style 'v' spelling onto 'u'. This
// equivalence is what classifies length-preserving spelling aliases (jv->ju,
// nue->nve) as "explainable by the cut" so the preedit can be rebuilt with
// separators; removing it would drop separators for alias-typed input. It only
// ever compares two internally derived strings, never gates a user-facing
// mark — the dictionary-side corrected_from contract lives in
// quanpin_dictionary.cpp and treats v/u as distinct letters on purpose.
std::string FoldQuanpinAutocorrectLetters(const std::string &text)
{
std::string folded;
folded.reserve(text.size());
for (const char ch : text)
{
if (ch == '\'')
{
continue;
}
const char lower = static_cast<char>(std::tolower(static_cast<unsigned char>(ch)));
folded.push_back(lower == 'v' ? 'u' : lower);
}
return folded;
}
// Folded letters of a cut's syllable sequence, for comparing the BFS reading
// against the scheme segmentation reading.
std::string CutSyllableLetters(const quanpin::AutocorrectCut &cut)
{
std::string letters;
for (const auto &segment : cut.segments)
{
letters += segment.syllable;
}
return FoldQuanpinAutocorrectLetters(letters);
}
// Rebuilds the preedit from the cased input letters with separators at the raw
// spans the correction BFS reports. Letters (case included) are preserved
// verbatim; manual delimiters are replaced by the actual cut positions.
std::string RebuildQuanpinDisplayFromCut(const std::string &cased_input, const quanpin::AutocorrectCut &cut)
{
std::string display;
display.reserve(cased_input.size() + cut.segments.size());
size_t letter_index = 0;
size_t boundary_index = 0;
const size_t boundary_count = cut.segments.empty() ? 0 : cut.segments.size() - 1;
for (const char ch : cased_input)
{
if (ch == '\'')
{
continue;
}
display.push_back(ch);
++letter_index;
if (boundary_index < boundary_count &&
letter_index == cut.segments[boundary_index].start + cut.segments[boundary_index].raw_text.size())
{
display.push_back('\'');
++boundary_index;
}
}
return display;
}
// The preedit must always show the letters the user actually typed (PRD R5).
// Two layers can rewrite them into canonical pinyin: the scheme alias table
// (sahng -> shang, baked into raw_segmentation) and the dictionary correction
// BFS (shabg -> shang, which only re-separates). Both are rebuilt here from
// the raw letters with separators at the actual cut positions; when the BFS
// cannot explain a rewrite (length-changing aliases such as mihng -> ming) the
// raw letters are shown without separators. The rebuild is deliberately
// switch-independent: the alias layer rewrites letters regardless of the
// autocorrect switches, and AC1 only constrains the candidate list.
std::string BuildQuanpinAutocorrectDisplay(const QueryRequest &request)
{
const std::string &cased = request.raw_input_with_cases.empty() ? request.raw_input : request.raw_input_with_cases;
const std::string base = request.raw_segmentation.empty() ? cased : request.raw_segmentation;
if (request.raw_input.empty() || cased.empty())
{
return base;
}
const unsigned types = QuanpinAutocorrectTypes(request);
const std::string folded_input = FoldQuanpinAutocorrectLetters(cased);
const bool letters_rewritten = FoldQuanpinAutocorrectLetters(QuanpinLettersWithoutDelimiters(base)) != folded_input;
// Fast path: the scheme kept the typed letters and either no correction
// type is enabled or the input is already a complete pinyin spelling, so
// no correction interpretation exists to draw separators from.
if (!letters_rewritten && (types == 0 || quanpin::is_complete_pinyin_input(request.raw_input)))
{
return base;
}
// Jianpin guard, mirroring resolve_series_query in the dictionary layer: a
// legal syllable plus at most one trailing letter is user intent, never a
// typo. The deletion table explains shapes like "zheg" -> zheng, so without
// this guard the preedit would lose the scheme separators once the deletion
// bit rides along with the legacy switches.
if (quanpin::looks_like_syllable_with_jianpin_tail(request.raw_input))
{
return base;
}
const auto cut = quanpin::autocorrect_cut_detail(folded_input, types);
// When the scheme rewrote the letters, the query resolved through the alias
// layer, so the preedit may only draw separators from the BFS when both
// layers explain the letters identically ("sahnghao" -> shang'hao).
// Otherwise the deletion bit would re-separate "sahng" as sa'hng while the
// candidates actually come from the alias reading shang -- the old code
// never noticed because the cut happened to be empty without it.
if (!cut.empty() && (!letters_rewritten || CutSyllableLetters(cut) == FoldQuanpinAutocorrectLetters(
QuanpinLettersWithoutDelimiters(base))))
{
return RebuildQuanpinDisplayFromCut(cased, cut);
}
// The BFS cannot explain the input (e.g. a length-changing alias such as
// mihng -> ming): fall back to the plain raw letters when the letters were
// rewritten, otherwise keep the scheme segmentation untouched.
return letters_rewritten ? QuanpinLettersWithoutDelimiters(cased) : base;
}
} // namespace
void InputSession::handle_engine_key(ImeKeyCode vk, ImeModifierMask modifiers_down, ImeCharacter wch)
{
engine_.handle_key(vk, modifiers_down, wch);
online_requests_.invalidate();
update_mixed_candidates();
}
void InputSession::recompute_candidates()
{
if (has_pending_pinyin_sequence_ || has_pending_pinyin_sequence_with_cases_)
{
apply_pending_sequence();
return;
}
engine_.handle_key(0, 0, 0);
update_mixed_candidates();
}
SchemeType InputSession::current_scheme_type() const
{
return engine_.current_scheme_type();
}
void InputSession::reset_state()
{
clear_pending_sequence();
reset_composition();
}
void InputSession::reset_cache()
{
engine_.reset_cache();
if (canonical_phrase_engine_)
canonical_phrase_engine_->reset_cache();
}
const std::vector<WordItem> &InputSession::get_candidates() const
{
return candidates();
}
bool InputSession::expand_initial_candidates()
{
return engine_.expand_initial_candidates();
}
std::optional<WordItem> InputSession::find_candidate(const std::string &key, const std::string &value)
{
return engine_.find_candidate(key, value);
}
const QueryRequest &InputSession::request() const
{
return engine_.get_request();
}
const std::string &InputSession::get_pinyin_sequence() const
{
return request().raw_input;
}
const std::string &InputSession::get_pinyin_sequence_with_cases() const
{
return request().raw_input_with_cases.empty() ? request().raw_input : request().raw_input_with_cases;
}
const std::string &InputSession::get_pure_pinyin_sequence() const
{
return request().normalized_input;
}
const std::string &InputSession::get_pinyin_segmentation() const
{
return request().normalized_segmentation.empty() ? request().segmentation : request().normalized_segmentation;
}
std::string InputSession::get_pinyin_segmentation_with_cases() const
{
if (is_wubi())
{
return request().raw_input;
}
if (is_japanese())
{
return request().raw_input_with_cases.empty() ? request().raw_input : request().raw_input_with_cases;
}
if (is_shuangpin() && shuangpin_preedit_uses_raw_)
{
std::string preedit = request().raw_segmentation.empty() ? request().raw_input : request().raw_segmentation;
if (!request().raw_input_with_cases.empty() && request().raw_input_with_cases.back() == '\'' &&
(preedit.empty() || preedit.back() != '\''))
{
preedit.push_back('\'');
}
return preedit;
}
if (current_scheme_type() == SchemeType::Quanpin)
{
return BuildQuanpinAutocorrectDisplay(request());
}
std::string preedit =
request().normalized_segmentation.empty() ? request().segmentation : request().normalized_segmentation;
if (!request().raw_input_with_cases.empty() && request().raw_input_with_cases.back() == '\'' &&
(preedit.empty() || preedit.back() != '\''))
{
preedit.push_back('\'');
}
return preedit;
}
std::string InputSession::get_quanpin() const
{
return request().normalized_input;
}
bool InputSession::is_all_complete_pure_pinyin() const
{
if (is_wubi())
{
return request().valid;
}
if (is_japanese())
{
return japanese::ConvertRomaji(request().raw_input).complete;
}
if (is_shuangpin())
{
const auto base = ResolveShuangpinCompositionBase(request(), shuangpin_profile_);
if (base.helpcode_length > 0 && base.effective_raw_input.size() >= base.helpcode_length)
{
const size_t base_length = base.effective_raw_input.size() - base.helpcode_length;
return shuangpin::is_complete_input(
base.raw_input.substr(0, shuangpin::raw_length_for_effective_prefix(base.raw_input, base_length)),
shuangpin_profile_);
}
return shuangpin::is_complete_input(base.raw_input, shuangpin_profile_);
}
const auto &segmentation =
request().normalized_segmentation.empty() ? request().segmentation : request().normalized_segmentation;
return !segmentation.empty() && quanpin::is_complete_pinyin_input(segmentation);
}
bool InputSession::has_active_helpcode() const
{
if (is_wubi() || is_japanese())
{
return false;
}
if (is_shuangpin())
{
return ResolveShuangpinCompositionBase(request(), shuangpin_profile_).helpcode_length > 0;
}
return HasActiveQuanpinHelpcode(request());
}
void InputSession::set_pinyin_sequence(const std::string &pinyin_sequence)
{
pending_pinyin_sequence_ = pinyin_sequence;
has_pending_pinyin_sequence_ = true;
}
void InputSession::set_pinyin_sequence_with_cases(const std::string &pinyin_sequence)
{
pending_pinyin_sequence_with_cases_ = pinyin_sequence;
has_pending_pinyin_sequence_with_cases_ = true;
}
int InputSession::store_user_phrase(std::string pinyin, std::string word)
{
return engine_.create_word(std::move(pinyin), std::move(word));
}
int InputSession::store_user_phrase_from_canonical_pinyin(std::string pinyin, std::string word)
{
// Both quanpin and shuangpin ultimately share the canonical quanpin
// dictionary. Do not feed a complete quanpin key back through the active
// shuangpin profile a second time.
if (!canonical_phrase_engine_)
canonical_phrase_engine_ = std::make_unique<QuanpinEngine>(paths_);
return canonical_phrase_engine_->create_word_from_canonical_pinyin(std::move(pinyin), std::move(word));
}
int InputSession::pin_candidate(std::string pinyin, std::string word)
{
return engine_.update_weight_by_pinyin_and_word(std::move(pinyin), std::move(word));
}
int InputSession::remove_candidate(std::string pinyin, std::string word)
{
if (!is_wubi() && remove_delimiters(request().raw_input).size() == 1)
{
return -1;
}
return engine_.delete_by_pinyin_and_word(std::move(pinyin), std::move(word));
}
int InputSession::cache_dynamic_candidate(const std::string &pinyin, const std::string &word, CandidateSource source)
{
const int cache_result = engine_.cache_dynamic_candidate(pinyin, word, source);
(void)engine_.cache_dynamic_candidate_for_current_request(word, source);
return cache_result;
}
InputSession::SelectionTransition InputSession::advance_composition_after_selection(
const std::string &selected_pinyin, const std::string &selected_word, const std::string &selected_canonical_pinyin)
{
SelectionTransition transition;
transition.selected_canonical_pinyin = selected_canonical_pinyin;
if (is_japanese())
{
transition.full_pure_pinyin = request().raw_input;
transition.current_segmentation = request().segmentation;
transition.current_segmentation_with_cases = request().raw_input_with_cases;
return transition;
}
if (wubi_candidates_are_native())
{
transition.full_pure_pinyin = request().normalized_input;
transition.current_segmentation = request().normalized_input;
transition.current_segmentation_with_cases = request().raw_input;
return transition;
}
if (is_shuangpin())
{
const auto base = ResolveShuangpinCompositionBase(request(), shuangpin_profile_);
const size_t word_pinyin_length = HelpcodeUtils::count_han_chars(selected_word) * 2;
const size_t total_input_length = base.effective_raw_input.size();
transition.full_pure_pinyin =
base.helpcode_length > 0 && total_input_length >= base.helpcode_length
? base.effective_raw_input.substr(0, total_input_length - base.helpcode_length)
: base.effective_raw_input;
size_t consumed_length = remove_delimiters(selected_pinyin).size();
if (base.helpcode_length > 0)
{
const size_t rest_start =
shuangpin::raw_length_for_effective_prefix(base.raw_input_with_cases, word_pinyin_length);
transition.consumed_raw_input_with_cases = base.raw_input_with_cases.substr(0, rest_start);
const size_t required_length = word_pinyin_length + base.helpcode_length;
transition.continues_composition =
required_length < total_input_length && word_pinyin_length < total_input_length;
if (transition.continues_composition)
{
const size_t rest_end = shuangpin::raw_length_for_effective_prefix(
base.raw_input_with_cases, total_input_length - base.helpcode_length);
const std::string rest_pinyin_sequence = base.raw_input.substr(rest_start, rest_end - rest_start);
std::string normalized_rest = rest_pinyin_sequence;
std::string cased_rest = base.raw_input_with_cases.substr(rest_start, rest_end - rest_start);
remove_consumed_leading_separators(normalized_rest, cased_rest);
engine_.replace_shuangpin_raw_input(normalized_rest, cased_rest);
online_requests_.invalidate();
update_mixed_candidates();
}
}
else
{
if (consumed_length == 0 || consumed_length > base.effective_raw_input.size())
{
consumed_length = (std::min)(word_pinyin_length, base.effective_raw_input.size());
}
const size_t consumed_raw_length =
shuangpin::raw_length_for_effective_prefix(base.raw_input_with_cases, consumed_length);
transition.consumed_raw_input_with_cases = base.raw_input_with_cases.substr(0, consumed_raw_length);
transition.continues_composition = consumed_length < transition.full_pure_pinyin.size();
if (transition.continues_composition)
{
const std::string rest_pinyin_sequence =
base.raw_input.substr(consumed_raw_length, base.raw_input.size() - consumed_raw_length);
const std::string rest_pinyin_sequence_with_cases = base.raw_input_with_cases.substr(
consumed_raw_length, base.raw_input_with_cases.size() - consumed_raw_length);
std::string normalized_rest = rest_pinyin_sequence;
std::string cased_rest = rest_pinyin_sequence_with_cases;
remove_consumed_leading_separators(normalized_rest, cased_rest);
engine_.replace_shuangpin_raw_input(normalized_rest, cased_rest);
online_requests_.invalidate();
update_mixed_candidates();
}
}
transition.current_segmentation = get_pinyin_segmentation();
transition.current_segmentation_with_cases = get_pinyin_segmentation_with_cases();
return transition;
}
transition.full_pure_pinyin = request().normalized_input;
const std::string current_segmentation =
request().normalized_segmentation.empty() ? request().segmentation : request().normalized_segmentation;
const std::string current_segmentation_with_cases = get_pinyin_segmentation_with_cases();
const std::string selected_pure_pinyin = remove_delimiters(selected_pinyin);
const std::string raw_input_without_helpcodes =
quanpin::strip_active_helpcodes(request().raw_input, request().raw_input_with_cases);
const std::string raw_input_with_cases_without_helpcodes =
quanpin::strip_active_helpcodes_with_cases(request().raw_input, request().raw_input_with_cases);
size_t consumed_raw_length =
shuangpin::raw_length_for_effective_prefix(raw_input_with_cases_without_helpcodes, selected_pure_pinyin.size());
transition.consumed_raw_input_with_cases = raw_input_with_cases_without_helpcodes.substr(0, consumed_raw_length);
transition.continues_composition = !selected_pure_pinyin.empty() &&
selected_pure_pinyin.size() < transition.full_pure_pinyin.size() &&
consumed_raw_length < raw_input_without_helpcodes.size();
if (transition.continues_composition)
{
std::string rest_raw_input = raw_input_without_helpcodes.substr(consumed_raw_length);
std::string rest_raw_input_with_cases = raw_input_with_cases_without_helpcodes.substr(consumed_raw_length);
remove_consumed_leading_separators(rest_raw_input, rest_raw_input_with_cases);
engine_.replace_active_raw_input(rest_raw_input, rest_raw_input_with_cases);
online_requests_.invalidate();
update_mixed_candidates();
transition.current_segmentation = get_pinyin_segmentation();
transition.current_segmentation_with_cases = get_pinyin_segmentation_with_cases();
return transition;
}
transition.current_segmentation = current_segmentation;
transition.current_segmentation_with_cases = current_segmentation_with_cases;
return transition;
}
InputSession::CloudQueryState InputSession::get_cloud_query_state() const
{
CloudQueryState state;
if (is_japanese())
{
state.cache_key = request().raw_input;
state.committed_pinyin = request().raw_input;
state.should_query = !request().raw_input.empty();
state.query_text = state.should_query ? request().raw_input : std::string{};
return state;
}
if (is_wubi())
{
state.cache_key = request().normalized_input;
state.committed_pinyin = request().normalized_input;
return state;
}
if (is_shuangpin())
{
const auto base = ResolveShuangpinCompositionBase(request(), shuangpin_profile_);
state.cache_key = ResolveShuangpinCloudCacheKey(request(), shuangpin_profile_);
state.committed_pinyin = shuangpin::remove_manual_delimiters(state.cache_key);
if (has_active_helpcode())
{
return state;
}
const char last =
base.effective_raw_input_with_cases.empty() ? '\0' : base.effective_raw_input_with_cases.back();
const bool ends_with_input_key = (last >= 'a' && last <= 'z') || last == ';';
state.should_query =
ends_with_input_key && shuangpin::is_complete_input(base.effective_raw_input, shuangpin_profile_);
if (state.should_query)
{
state.query_text = shuangpin::normalize_input_with_delimiters(state.cache_key, shuangpin_profile_);
}
return state;
}
state.committed_pinyin = request().normalized_input;
state.cache_key = ResolveQuanpinCloudCacheKey(request());
if (has_active_helpcode())
{
return state;
}
state.should_query = !request().normalized_input.empty();
state.query_text = request().normalized_input;
return state;
}
InputSession::CreatingWordProgress InputSession::update_creating_word_progress(
const std::string &current_pinyin, const std::string &current_word, const std::string &selected_word,
const SelectionTransition &selection_transition) const
{
CreatingWordProgress progress;
if (wubi_candidates_are_native())
{
progress.pinyin = current_pinyin.empty() ? selection_transition.full_pure_pinyin : current_pinyin;
progress.word = current_word + selected_word;
progress.preedit = progress.word;
progress.completed = true;
progress.can_store = false;
return progress;
}
const std::string selected_canonical =
normalize_canonical_pinyin_for_word(selection_transition.selected_canonical_pinyin, selected_word);
const bool prior_parts_are_storeable = current_word.empty() || !current_pinyin.empty();
if (prior_parts_are_storeable && !selected_canonical.empty())
{
progress.pinyin = append_canonical_pinyin(current_pinyin, selected_canonical);
}
progress.word = current_word + selected_word;
progress.preedit = progress.word + selection_transition.current_segmentation_with_cases;
progress.completed = !selection_transition.continues_composition;
progress.can_store =
progress.completed && !normalize_canonical_pinyin_for_word(progress.pinyin, progress.word).empty();
return progress;
}
bool InputSession::is_shuangpin() const
{
return current_scheme_type() == SchemeType::Shuangpin;
}
bool InputSession::is_wubi() const
{
return current_scheme_type() == SchemeType::Wubi;
}
bool InputSession::answered_by_pinyin_fallback() const
{
return engine_.answered_by_pinyin_fallback();
}
bool InputSession::wubi_candidates_are_native() const
{
return is_wubi() && !engine_.answered_by_pinyin_fallback();
}
bool InputSession::candidates_follow_pinyin() const
{
return current_scheme_type() == SchemeType::Quanpin || current_scheme_type() == SchemeType::Shuangpin ||
engine_.answered_by_pinyin_fallback();
}
bool InputSession::is_japanese() const
{
return current_scheme_type() == SchemeType::JapaneseRomaji;
}
void InputSession::clear_pending_sequence()
{
pending_pinyin_sequence_.clear();
pending_pinyin_sequence_with_cases_.clear();
has_pending_pinyin_sequence_ = false;
has_pending_pinyin_sequence_with_cases_ = false;
}
void InputSession::apply_pending_sequence()
{
caret_.reset();
const std::string raw_input = has_pending_pinyin_sequence_ ? pending_pinyin_sequence_ : request().raw_input;
const std::string raw_input_with_cases =
has_pending_pinyin_sequence_with_cases_ ? pending_pinyin_sequence_with_cases_ : raw_input;
switch (current_scheme_type())
{
case SchemeType::Shuangpin:
engine_.replace_shuangpin_raw_input(raw_input, raw_input_with_cases);
break;
case SchemeType::Quanpin:
engine_.replace_quanpin_raw_input(raw_input, raw_input_with_cases);
break;
case SchemeType::Wubi:
engine_.replace_wubi_raw_input(raw_input, raw_input_with_cases);
break;
case SchemeType::JapaneseRomaji:
engine_.replace_japanese_raw_input(raw_input, raw_input_with_cases);
break;
}
clear_pending_sequence();
online_requests_.invalidate();
update_mixed_candidates();
}
} // namespace metasequoia