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/*
* Copyright (c) 2022, Idan Horowitz <idan.horowitz@serenityos.org>
* Copyright (c) 2023, Tim Flynn <trflynn89@serenityos.org>
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Forward.h>
#include <AK/Function.h>
#include <AK/IterationDecision.h>
#include <AK/Optional.h>
#include <AK/Types.h>
#include <AK/Vector.h>
namespace Unicode {
using SegmentationCallback = Function<IterationDecision(size_t)>;
void for_each_grapheme_segmentation_boundary(Utf8View const&, SegmentationCallback);
void for_each_grapheme_segmentation_boundary(Utf16View const&, SegmentationCallback);
void for_each_grapheme_segmentation_boundary(Utf32View const&, SegmentationCallback);
template<typename ViewType>
Vector<size_t> find_grapheme_segmentation_boundaries(ViewType const& view)
{
Vector<size_t> boundaries;
for_each_grapheme_segmentation_boundary(view, [&](auto boundary) {
boundaries.append(boundary);
return IterationDecision::Continue;
});
return boundaries;
}
template<typename ViewType>
Optional<size_t> next_grapheme_segmentation_boundary(ViewType const& view, size_t index)
{
Optional<size_t> result;
for_each_grapheme_segmentation_boundary(view, [&](auto boundary) {
if (boundary > index) {
result = boundary;
return IterationDecision::Break;
}
return IterationDecision::Continue;
});
return result;
}
template<typename ViewType>
Optional<size_t> previous_grapheme_segmentation_boundary(ViewType const& view, size_t index)
{
Optional<size_t> result;
for_each_grapheme_segmentation_boundary(view, [&](auto boundary) {
if (boundary < index) {
result = boundary;
return IterationDecision::Continue;
}
return IterationDecision::Break;
});
return result;
}
void for_each_word_segmentation_boundary(Utf8View const&, SegmentationCallback);
void for_each_word_segmentation_boundary(Utf16View const&, SegmentationCallback);
void for_each_word_segmentation_boundary(Utf32View const&, SegmentationCallback);
template<typename ViewType>
Vector<size_t> find_word_segmentation_boundaries(ViewType const& view)
{
Vector<size_t> boundaries;
for_each_word_segmentation_boundary(view, [&](auto boundary) {
boundaries.append(boundary);
return IterationDecision::Continue;
});
return boundaries;
}
template<typename ViewType>
Optional<size_t> next_word_segmentation_boundary(ViewType const& view, size_t index)
{
Optional<size_t> result;
for_each_word_segmentation_boundary(view, [&](auto boundary) {
if (boundary > index) {
result = boundary;
return IterationDecision::Break;
}
return IterationDecision::Continue;
});
return result;
}
template<typename ViewType>
Optional<size_t> previous_word_segmentation_boundary(ViewType const& view, size_t index)
{
Optional<size_t> result;
for_each_word_segmentation_boundary(view, [&](auto boundary) {
if (boundary < index) {
result = boundary;
return IterationDecision::Continue;
}
return IterationDecision::Break;
});
return result;
}
void for_each_sentence_segmentation_boundary(Utf8View const&, SegmentationCallback);
void for_each_sentence_segmentation_boundary(Utf16View const&, SegmentationCallback);
void for_each_sentence_segmentation_boundary(Utf32View const&, SegmentationCallback);
template<typename ViewType>
Vector<size_t> find_sentence_segmentation_boundaries(ViewType const& view)
{
Vector<size_t> boundaries;
for_each_sentence_segmentation_boundary(view, [&](auto boundary) {
boundaries.append(boundary);
return IterationDecision::Continue;
});
return boundaries;
}
template<typename ViewType>
Optional<size_t> next_sentence_segmentation_boundary(ViewType const& view, size_t index)
{
Optional<size_t> result;
for_each_sentence_segmentation_boundary(view, [&](auto boundary) {
if (boundary > index) {
result = boundary;
return IterationDecision::Break;
}
return IterationDecision::Continue;
});
return result;
}
template<typename ViewType>
Optional<size_t> previous_sentence_segmentation_boundary(ViewType const& view, size_t index)
{
Optional<size_t> result;
for_each_sentence_segmentation_boundary(view, [&](auto boundary) {
if (boundary < index) {
result = boundary;
return IterationDecision::Continue;
}
return IterationDecision::Break;
});
return result;
}
}
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