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// Copyright 2021 Benjamin Barenblat
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not
// use this file except in compliance with the License. You may obtain a copy of
// the License at
//
// https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
// WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
// License for the specific language governing permissions and limitations under
// the License.
#ifndef EC_GOLDFISHTERM_SIMPLE_H_
#define EC_GOLDFISHTERM_SIMPLE_H_
#include <termios.h>
#include <iostream>
#include <vector>
#include "goldfishterm/internal/string_capability.h"
#include "goldfishterm/terminfo.h"
#include "third_party/abseil/absl/strings/string_view.h"
namespace goldfishterm {
// Looks up escape sequences for the terminal described in the TERM environment
// variable, and allows sending those escape sequences to standard output.
//
// This class is thread-safe, provided you don't mutate the TERM environment
// variable while its constructor is running.
class SimpleTerminalOutput final {
public:
explicit SimpleTerminalOutput();
explicit SimpleTerminalOutput(const termios&);
SimpleTerminalOutput(const SimpleTerminalOutput&) noexcept = default;
SimpleTerminalOutput& operator=(const SimpleTerminalOutput&) noexcept =
default;
SimpleTerminalOutput(SimpleTerminalOutput&&) noexcept = default;
SimpleTerminalOutput& operator=(SimpleTerminalOutput&&) noexcept = default;
void Write(absl::string_view s) { std::cout.write(s.data(), s.size()); }
void Flush() { std::cout.flush(); }
// Rings the bell. On some terminals, this may flash the screen instead.
void Beep() { Emit(StringCapability::kBell); }
// Moves the cursor to the beginning of the current line.
void BeginningOfLine() { Emit(StringCapability::kCarriageReturn); }
// Clears from the cursor to the end of the current line.
void ClearToEndOfLine() { Emit(StringCapability::kClrEol); }
// Moves the cursor down one line.
void CursorDown() { Emit(StringCapability::kCursorDown); }
private:
void Emit(StringCapability,
std::vector<goldfishterm_internal::StringCapabilityParameter> = {});
TerminfoEntry terminfo_;
int baud_;
};
} // namespace goldfishterm
#endif // EC_GOLDFISHTERM_SIMPLE_H_
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