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Telegram/lib_ui/emoji_suggestions/emoji_suggestions.h

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+// This file is part of Desktop App Toolkit,
+// a set of libraries for developing nice desktop applications.
+//
+// For license and copyright information please follow this link:
+// https://github.com/desktop-app/legal/blob/master/LEGAL
+//
+#pragma once
+
+#include <vector>
+
+namespace Ui {
+namespace Emoji {
+
+using small = unsigned char;
+using medium = unsigned short;
+using utf16char = unsigned short;
+
+static_assert(sizeof(utf16char) == 2, "Bad UTF-16 character size.");
+
+class utf16string {
+public:
+	utf16string() = default;
+	utf16string(const utf16char *data, std::size_t size) : data_(data), size_(size) {
+	}
+	utf16string(const utf16string &other) = default;
+	utf16string &operator=(const utf16string &other) = default;
+
+	const utf16char *data() const {
+		return data_;
+	}
+	std::size_t size() const {
+		return size_;
+	}
+
+	utf16char operator[](int index) const {
+		return data_[index];
+	}
+
+private:
+	const utf16char *data_ = nullptr;
+	std::size_t size_ = 0;
+
+};
+
+inline bool operator==(utf16string a, utf16string b) {
+	return (a.size() == b.size()) && (!a.size() || !memcmp(a.data(), b.data(), a.size() * sizeof(utf16char)));
+}
+
+namespace internal {
+
+using checksum = unsigned int;
+checksum countChecksum(const void *data, std::size_t size);
+
+utf16string GetReplacementEmoji(utf16string replacement);
+
+} // namespace internal
+
+class Suggestion {
+public:
+	Suggestion() = default;
+	Suggestion(utf16string emoji, utf16string label, utf16string replacement) : emoji_(emoji), label_(label), replacement_(replacement) {
+	}
+	Suggestion(const Suggestion &other) = default;
+	Suggestion &operator=(const Suggestion &other) = default;
+
+	utf16string emoji() const {
+		return emoji_;
+	}
+	utf16string label() const {
+		return label_;
+	}
+	utf16string replacement() const {
+		return replacement_;
+	}
+
+private:
+	utf16string emoji_;
+	utf16string label_;
+	utf16string replacement_;
+
+};
+
+std::vector<Suggestion> GetSuggestions(utf16string query);
+
+inline utf16string GetSuggestionEmoji(utf16string replacement) {
+	return internal::GetReplacementEmoji(replacement);
+}
+
+int GetSuggestionMaxLength();
+
+} // namespace Emoji
+} // namespace Ui