tesseract
5.0.0-alpha-619-ge9db
validate_javanese.h
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/**********************************************************************
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* File: validate_javanese.h
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* Description: Text validator for Javanese Script - aksara jawa.
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* Author: Shree Devi Kumar
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* Created: August 03, 2018
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*
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**********************************************************************/
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#ifndef TESSERACT_TRAINING_VALIDATE_JAVANESE_H_
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#define TESSERACT_TRAINING_VALIDATE_JAVANESE_H_
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#include "
validator.h
"
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namespace
tesseract
{
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// Subclass of Validator that validates and segments Javanese scripts
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class
ValidateJavanese :
public
Validator {
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public
:
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ValidateJavanese
(
ViramaScript
script,
bool
report_errors)
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:
Validator
(script, report_errors) {}
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~ValidateJavanese
() {}
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protected
:
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// Returns whether codes matches the pattern for an Javanese Grapheme.
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// Consumes the next Grapheme in codes_[codes_used_++...] and copies it to
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// parts_ and output_. Returns true if a valid Grapheme was consumed,
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// otherwise does not increment codes_used_.
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bool
ConsumeGraphemeIfValid
()
override
;
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// Returns the CharClass corresponding to the given Unicode ch.
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Validator::CharClass
UnicodeToCharClass
(
char32
ch)
const override
;
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private
:
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// Helper consumes/copies a virama and any associated post-virama joiners.
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bool
ConsumeViramaIfValid(
IndicPair
joiner,
bool
post_matra);
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// Helper consumes/copies a series of consonants separated by viramas while
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// valid, but not any vowel or other modifiers.
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bool
ConsumeConsonantHeadIfValid();
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// Helper consumes/copies a tail part of a consonant, comprising optional
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// matra/piece, vowel modifier, vedic mark, terminating virama.
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bool
ConsumeConsonantTailIfValid();
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// Helper consumes/copies a vowel and optional modifiers.
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bool
ConsumeVowelIfValid();
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// Some special unicodes used only for Javanese processing.
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static
const
char32
kPengkal = 0xa9be;
// Javanese Ya
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static
const
char32
kCakra = 0xa9bf;
// Javanese Ra
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};
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}
// namespace tesseract
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#endif // TESSERACT_TRAINING_VALIDATE_JAVANESE_H_
tesseract::ValidateJavanese::ValidateJavanese
ValidateJavanese(ViramaScript script, bool report_errors)
Definition:
validate_javanese.h:60
tesseract::ValidateJavanese::UnicodeToCharClass
Validator::CharClass UnicodeToCharClass(char32 ch) const override
Definition:
validate_javanese.cpp:270
tesseract::ValidateJavanese::ConsumeGraphemeIfValid
bool ConsumeGraphemeIfValid() override
Definition:
validate_javanese.cpp:53
tesseract::Validator::IndicPair
std::pair< CharClass, char32 > IndicPair
Definition:
validator.h:148
tesseract::ViramaScript
ViramaScript
Definition:
validator.h:67
tesseract::Validator::CharClass
CharClass
Definition:
validator.h:126
validator.h
tesseract::char32
signed int char32
Definition:
unichar.h:53
tesseract
Definition:
baseapi.h:65
char32
signed int char32
Definition:
pango_font_info.h:33
tesseract::ValidateJavanese::~ValidateJavanese
~ValidateJavanese()
Definition:
validate_javanese.h:62
tesseract::Validator::Validator
Validator(ViramaScript script, bool report_errors)
Definition:
validator.h:150
src
training
validate_javanese.h
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