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67 lines
2.0 KiB
C++
67 lines
2.0 KiB
C++
#pragma once
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#include <common/types.h>
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#include <atomic>
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#include <vector>
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#include <optional>
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class LineReader
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{
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public:
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struct Suggest
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{
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using Words = std::vector<std::string>;
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using WordsRange = std::pair<Words::const_iterator, Words::const_iterator>;
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Words words;
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Words words_no_case;
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std::atomic<bool> ready{false};
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/// Get iterators for the matched range of words if any.
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std::optional<WordsRange> getCompletions(const String & prefix, size_t prefix_length) const;
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};
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using Patterns = std::vector<const char *>;
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LineReader(const String & history_file_path, bool multiline, Patterns extenders, Patterns delimiters);
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virtual ~LineReader() {}
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/// Reads the whole line until delimiter (in multiline mode) or until the last line without extender.
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/// If resulting line is empty, it means the user interrupted the input.
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/// Non-empty line is appended to history - without duplication.
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/// Typical delimiter is ';' (semicolon) and typical extender is '\' (backslash).
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String readLine(const String & first_prompt, const String & second_prompt);
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/// When bracketed paste mode is set, pasted text is bracketed with control sequences so
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/// that the program can differentiate pasted text from typed-in text. This helps
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/// clickhouse-client so that without -m flag, one can still paste multiline queries, and
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/// possibly get better pasting performance. See https://cirw.in/blog/bracketed-paste for
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/// more details.
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virtual void enableBracketedPaste() {}
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protected:
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enum InputStatus
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{
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ABORT = 0,
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RESET_LINE,
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INPUT_LINE,
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};
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const String history_file_path;
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static constexpr char word_break_characters[] = " \t\v\f\a\b\r\n`~!@#$%^&*()-=+[{]}\\|;:'\",<.>/?";
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String input;
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private:
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bool multiline;
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Patterns extenders;
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Patterns delimiters;
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String prev_line;
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virtual InputStatus readOneLine(const String & prompt);
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virtual void addToHistory(const String &) {}
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};
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