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AK: Add the Utf8View::{contains, trim} helper methods
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@ -173,6 +173,47 @@ bool Utf8View::starts_with(const Utf8View& start) const
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return true;
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}
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bool Utf8View::contains(u32 needle) const
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{
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for (u32 code_point : *this) {
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if (code_point == needle)
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return true;
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}
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return false;
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}
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Utf8View Utf8View::trim(const Utf8View& characters, TrimMode mode) const
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{
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size_t substring_start = 0;
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size_t substring_length = length();
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if (mode == TrimMode::Left || mode == TrimMode::Both) {
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for (auto code_point : *this) {
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if (substring_length == 0)
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return {};
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if (!characters.contains(code_point))
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break;
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++substring_start;
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--substring_length;
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}
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}
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if (mode == TrimMode::Right || mode == TrimMode::Both) {
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size_t seen_whitespace_length = 0;
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for (auto code_point : *this) {
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if (characters.contains(code_point))
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seen_whitespace_length++;
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else
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seen_whitespace_length = 0;
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}
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if (seen_whitespace_length >= substring_length)
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return {};
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substring_length -= seen_whitespace_length;
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}
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return substring_view(substring_start, substring_length);
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}
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Utf8CodePointIterator::Utf8CodePointIterator(const unsigned char* ptr, size_t length)
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: m_ptr(ptr)
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, m_length(length)
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@ -75,6 +75,9 @@ public:
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bool is_empty() const { return m_string.is_empty(); }
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bool starts_with(const Utf8View&) const;
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bool contains(u32) const;
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Utf8View trim(const Utf8View& characters, TrimMode mode = TrimMode::Both) const;
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size_t iterator_offset(const Utf8CodePointIterator& it) const
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{
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