diff options
Diffstat (limited to 'src/hb-aat-layout-common.hh')
| -rw-r--r-- | src/hb-aat-layout-common.hh | 72 |
1 files changed, 35 insertions, 37 deletions
diff --git a/src/hb-aat-layout-common.hh b/src/hb-aat-layout-common.hh index 7d53c354d..672f80e0d 100644 --- a/src/hb-aat-layout-common.hh +++ b/src/hb-aat-layout-common.hh @@ -851,43 +851,41 @@ struct StateTableDriver * * https://github.com/harfbuzz/harfbuzz/issues/2860 */ - const EntryT *wouldbe_entry; - bool safe_to_break = - /* 1. */ - !c->is_actionable (this, entry) - && - /* 2. */ - ( - /* 2a. */ - state == StateTableT::STATE_START_OF_TEXT - || - /* 2b. */ - ( - (entry.flags & context_t::DontAdvance) && - next_state == StateTableT::STATE_START_OF_TEXT - ) - || - /* 2c. */ - ( - wouldbe_entry = &machine.get_entry (StateTableT::STATE_START_OF_TEXT, klass) - , - /* 2c'. */ - !c->is_actionable (this, *wouldbe_entry) - && - /* 2c". */ - ( - next_state == machine.new_state (wouldbe_entry->newState) - && - (entry.flags & context_t::DontAdvance) == (wouldbe_entry->flags & context_t::DontAdvance) - ) - ) - ) - && - /* 3. */ - !c->is_actionable (this, machine.get_entry (state, StateTableT::CLASS_END_OF_TEXT)) - ; - - if (!safe_to_break && buffer->backtrack_len () && buffer->idx < buffer->len) + + const auto is_safe_to_break_extra = [&]() + { + /* 2c. */ + const auto wouldbe_entry = machine.get_entry(StateTableT::STATE_START_OF_TEXT, klass); + + /* 2c'. */ + if (c->is_actionable (this, wouldbe_entry)) + return false; + + /* 2c". */ + return next_state == machine.new_state(wouldbe_entry.newState) + && (entry.flags & context_t::DontAdvance) == (wouldbe_entry.flags & context_t::DontAdvance); + }; + + const auto is_safe_to_break = [&]() + { + /* 1. */ + if (c->is_actionable (this, entry)) + return false; + + /* 2. */ + // This one is meh, I know... + const auto ok = + state == StateTableT::STATE_START_OF_TEXT + || ((entry.flags & context_t::DontAdvance) && next_state == StateTableT::STATE_START_OF_TEXT) + || is_safe_to_break_extra(); + if (!ok) + return false; + + /* 3. */ + return !c->is_actionable (this, machine.get_entry (state, StateTableT::CLASS_END_OF_TEXT)); + }; + + if (!is_safe_to_break () && buffer->backtrack_len () && buffer->idx < buffer->len) buffer->unsafe_to_break_from_outbuffer (buffer->backtrack_len () - 1, buffer->idx + 1); c->transition (this, entry); |