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| <section id='main' class="content"><pre class="line-numbers"><span id="1"> 1</span> |
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| </pre><pre class="rust "> |
| <span class="doccomment">//! Unix specific definitions</span> |
| <span class="kw">use</span> <span class="ident">std</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">io</span>::{<span class="self">self</span>, <span class="ident">Read</span>, <span class="ident">Stdout</span>, <span class="ident">Write</span>}; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>; |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">sync</span>::<span class="ident">atomic</span>; |
| <span class="kw">use</span> <span class="ident">libc</span>; |
| <span class="kw">use</span> <span class="ident">nix</span>; |
| <span class="kw">use</span> <span class="ident">nix</span>::<span class="ident">poll</span>; |
| <span class="kw">use</span> <span class="ident">nix</span>::<span class="ident">sys</span>::<span class="ident">signal</span>; |
| <span class="kw">use</span> <span class="ident">nix</span>::<span class="ident">sys</span>::<span class="ident">termios</span>; |
| |
| <span class="kw">use</span> <span class="ident">char_iter</span>; |
| <span class="kw">use</span> <span class="ident">config</span>::<span class="ident">Config</span>; |
| <span class="kw">use</span> <span class="ident">consts</span>::{<span class="self">self</span>, <span class="ident">KeyPress</span>}; |
| <span class="kw">use</span> <span class="prelude-ty">Result</span>; |
| <span class="kw">use</span> <span class="ident">error</span>; |
| <span class="kw">use</span> <span class="kw">super</span>::{<span class="ident">RawMode</span>, <span class="ident">RawReader</span>, <span class="ident">Term</span>}; |
| |
| <span class="kw">const</span> <span class="ident">STDIN_FILENO</span>: <span class="ident">libc</span>::<span class="ident">c_int</span> <span class="op">=</span> <span class="ident">libc</span>::<span class="ident">STDIN_FILENO</span>; |
| <span class="kw">const</span> <span class="ident">STDOUT_FILENO</span>: <span class="ident">libc</span>::<span class="ident">c_int</span> <span class="op">=</span> <span class="ident">libc</span>::<span class="ident">STDOUT_FILENO</span>; |
| |
| <span class="doccomment">/// Unsupported Terminals that don't support RAW mode</span> |
| <span class="kw">static</span> <span class="ident">UNSUPPORTED_TERM</span>: [<span class="kw-2">&</span><span class="lifetime">'static</span> <span class="ident">str</span>; <span class="number">3</span>] <span class="op">=</span> [<span class="string">"dumb"</span>, <span class="string">"cons25"</span>, <span class="string">"emacs"</span>]; |
| |
| <span class="kw">fn</span> <span class="ident">get_win_size</span>() <span class="op">-></span> (<span class="ident">usize</span>, <span class="ident">usize</span>) { |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">mem</span>::<span class="ident">zeroed</span>; |
| |
| <span class="kw">unsafe</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">size</span>: <span class="ident">libc</span>::<span class="ident">winsize</span> <span class="op">=</span> <span class="ident">zeroed</span>(); |
| <span class="kw">match</span> <span class="ident">libc</span>::<span class="ident">ioctl</span>(<span class="ident">STDOUT_FILENO</span>, <span class="ident">libc</span>::<span class="ident">TIOCGWINSZ</span>, <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">size</span>) { |
| <span class="number">0</span> <span class="op">=></span> (<span class="ident">size</span>.<span class="ident">ws_col</span> <span class="kw">as</span> <span class="ident">usize</span>, <span class="ident">size</span>.<span class="ident">ws_row</span> <span class="kw">as</span> <span class="ident">usize</span>), <span class="comment">// TODO getCursorPosition</span> |
| _ <span class="op">=></span> (<span class="number">80</span>, <span class="number">24</span>), |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Check TERM environment variable to see if current term is in our</span> |
| <span class="doccomment">/// unsupported list</span> |
| <span class="kw">fn</span> <span class="ident">is_unsupported_term</span>() <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw">use</span> <span class="ident">std</span>::<span class="ident">ascii</span>::<span class="ident">AsciiExt</span>; |
| <span class="kw">match</span> <span class="ident">std</span>::<span class="ident">env</span>::<span class="ident">var</span>(<span class="string">"TERM"</span>) { |
| <span class="prelude-val">Ok</span>(<span class="ident">term</span>) <span class="op">=></span> { |
| <span class="kw">for</span> <span class="ident">iter</span> <span class="kw">in</span> <span class="kw-2">&</span><span class="ident">UNSUPPORTED_TERM</span> { |
| <span class="kw">if</span> (<span class="kw-2">*</span><span class="ident">iter</span>).<span class="ident">eq_ignore_ascii_case</span>(<span class="kw-2">&</span><span class="ident">term</span>) { |
| <span class="kw">return</span> <span class="bool-val">true</span>; |
| } |
| } |
| <span class="bool-val">false</span> |
| } |
| <span class="prelude-val">Err</span>(_) <span class="op">=></span> <span class="bool-val">false</span>, |
| } |
| } |
| |
| |
| <span class="doccomment">/// Return whether or not STDIN, STDOUT or STDERR is a TTY</span> |
| <span class="kw">fn</span> <span class="ident">is_a_tty</span>(<span class="ident">fd</span>: <span class="ident">libc</span>::<span class="ident">c_int</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="kw">unsafe</span> { <span class="ident">libc</span>::<span class="ident">isatty</span>(<span class="ident">fd</span>) <span class="op">!=</span> <span class="number">0</span> } |
| } |
| |
| <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">Mode</span> <span class="op">=</span> <span class="ident">termios</span>::<span class="ident">Termios</span>; |
| |
| <span class="kw">impl</span> <span class="ident">RawMode</span> <span class="kw">for</span> <span class="ident">Mode</span> { |
| <span class="doccomment">/// Disable RAW mode for the terminal.</span> |
| <span class="kw">fn</span> <span class="ident">disable_raw_mode</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">termios</span>::<span class="ident">tcsetattr</span>(<span class="ident">STDIN_FILENO</span>, <span class="ident">termios</span>::<span class="ident">TCSADRAIN</span>, <span class="self">self</span>)); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="comment">// Rust std::io::Stdin is buffered with no way to know if bytes are available.</span> |
| <span class="comment">// So we use low-level stuff instead...</span> |
| <span class="kw">struct</span> <span class="ident">StdinRaw</span> {} |
| |
| <span class="kw">impl</span> <span class="ident">Read</span> <span class="kw">for</span> <span class="ident">StdinRaw</span> { |
| <span class="kw">fn</span> <span class="ident">read</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">buf</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> [<span class="ident">u8</span>]) <span class="op">-></span> <span class="ident">io</span>::<span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">usize</span><span class="op">></span> { |
| <span class="kw">loop</span> { |
| <span class="kw">let</span> <span class="ident">res</span> <span class="op">=</span> <span class="kw">unsafe</span> { |
| <span class="ident">libc</span>::<span class="ident">read</span>(<span class="ident">STDIN_FILENO</span>, |
| <span class="ident">buf</span>.<span class="ident">as_mut_ptr</span>() <span class="kw">as</span> <span class="kw-2">*</span><span class="kw-2">mut</span> <span class="ident">libc</span>::<span class="ident">c_void</span>, |
| <span class="ident">buf</span>.<span class="ident">len</span>() <span class="kw">as</span> <span class="ident">libc</span>::<span class="ident">size_t</span>) |
| }; |
| <span class="kw">if</span> <span class="ident">res</span> <span class="op">==</span> <span class="op">-</span><span class="number">1</span> { |
| <span class="kw">let</span> <span class="ident">error</span> <span class="op">=</span> <span class="ident">io</span>::<span class="ident">Error</span>::<span class="ident">last_os_error</span>(); |
| <span class="kw">if</span> <span class="ident">error</span>.<span class="ident">kind</span>() <span class="op">!=</span> <span class="ident">io</span>::<span class="ident">ErrorKind</span>::<span class="ident">Interrupted</span> { |
| <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">error</span>); |
| } |
| } <span class="kw">else</span> { |
| <span class="kw">return</span> <span class="prelude-val">Ok</span>(<span class="ident">res</span> <span class="kw">as</span> <span class="ident">usize</span>); |
| } |
| } |
| } |
| } |
| |
| <span class="doccomment">/// Console input reader</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">PosixRawReader</span> { |
| <span class="ident">chars</span>: <span class="ident">char_iter</span>::<span class="ident">Chars</span><span class="op"><</span><span class="ident">StdinRaw</span><span class="op">></span>, |
| <span class="ident">timeout_ms</span>: <span class="ident">i32</span>, |
| } |
| |
| <span class="kw">impl</span> <span class="ident">PosixRawReader</span> { |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">new</span>(<span class="ident">config</span>: <span class="kw-2">&</span><span class="ident">Config</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PosixRawReader</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">stdin</span> <span class="op">=</span> <span class="ident">StdinRaw</span> {}; |
| <span class="prelude-val">Ok</span>(<span class="ident">PosixRawReader</span> { |
| <span class="ident">chars</span>: <span class="ident">char_iter</span>::<span class="ident">chars</span>(<span class="ident">stdin</span>), |
| <span class="ident">timeout_ms</span>: <span class="ident">config</span>.<span class="ident">keyseq_timeout</span>(), |
| }) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">escape_sequence</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">KeyPress</span><span class="op">></span> { |
| <span class="comment">// Read the next two bytes representing the escape sequence.</span> |
| <span class="kw">let</span> <span class="ident">seq1</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">next_char</span>()); |
| <span class="kw">if</span> <span class="ident">seq1</span> <span class="op">==</span> <span class="string">'['</span> { |
| <span class="comment">// ESC [ sequences.</span> |
| <span class="kw">let</span> <span class="ident">seq2</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">next_char</span>()); |
| <span class="kw">if</span> <span class="ident">seq2</span>.<span class="ident">is_digit</span>(<span class="number">10</span>) { |
| <span class="comment">// Extended escape, read additional byte.</span> |
| <span class="kw">let</span> <span class="ident">seq3</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">next_char</span>()); |
| <span class="kw">if</span> <span class="ident">seq3</span> <span class="op">==</span> <span class="string">'~'</span> { |
| <span class="prelude-val">Ok</span>(<span class="kw">match</span> <span class="ident">seq2</span> { |
| <span class="string">'1'</span> <span class="op">|</span> <span class="string">'7'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Home</span>, <span class="comment">// '1': xterm</span> |
| <span class="string">'3'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Delete</span>, |
| <span class="string">'4'</span> <span class="op">|</span> <span class="string">'8'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">End</span>, <span class="comment">// '4': xterm</span> |
| <span class="string">'5'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">PageUp</span>, |
| <span class="string">'6'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">PageDown</span>, |
| _ <span class="op">=></span> { |
| <span class="macro">debug</span><span class="macro">!</span>(<span class="ident">target</span>: <span class="string">"rustyline"</span>, <span class="string">"unsupported esc sequence: ESC{:?}{:?}{:?}"</span>, <span class="ident">seq1</span>, <span class="ident">seq2</span>, <span class="ident">seq3</span>); |
| <span class="ident">KeyPress</span>::<span class="ident">UnknownEscSeq</span> |
| } |
| }) |
| } <span class="kw">else</span> { |
| <span class="macro">debug</span><span class="macro">!</span>(<span class="ident">target</span>: <span class="string">"rustyline"</span>, <span class="string">"unsupported esc sequence: ESC{:?}{:?}{:?}"</span>, <span class="ident">seq1</span>, <span class="ident">seq2</span>, <span class="ident">seq3</span>); |
| <span class="prelude-val">Ok</span>(<span class="ident">KeyPress</span>::<span class="ident">UnknownEscSeq</span>) |
| } |
| } <span class="kw">else</span> { |
| <span class="prelude-val">Ok</span>(<span class="kw">match</span> <span class="ident">seq2</span> { |
| <span class="string">'A'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Up</span>, <span class="comment">// ANSI</span> |
| <span class="string">'B'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Down</span>, |
| <span class="string">'C'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Right</span>, |
| <span class="string">'D'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Left</span>, |
| <span class="string">'F'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">End</span>, |
| <span class="string">'H'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Home</span>, |
| _ <span class="op">=></span> { |
| <span class="macro">debug</span><span class="macro">!</span>(<span class="ident">target</span>: <span class="string">"rustyline"</span>, <span class="string">"unsupported esc sequence: ESC{:?}{:?}"</span>, <span class="ident">seq1</span>, <span class="ident">seq2</span>); |
| <span class="ident">KeyPress</span>::<span class="ident">UnknownEscSeq</span> |
| } |
| }) |
| } |
| } <span class="kw">else</span> <span class="kw">if</span> <span class="ident">seq1</span> <span class="op">==</span> <span class="string">'O'</span> { |
| <span class="comment">// ESC O sequences.</span> |
| <span class="kw">let</span> <span class="ident">seq2</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">next_char</span>()); |
| <span class="prelude-val">Ok</span>(<span class="kw">match</span> <span class="ident">seq2</span> { |
| <span class="string">'A'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Up</span>, |
| <span class="string">'B'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Down</span>, |
| <span class="string">'C'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Right</span>, |
| <span class="string">'D'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Left</span>, |
| <span class="string">'F'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">End</span>, |
| <span class="string">'H'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Home</span>, |
| _ <span class="op">=></span> { |
| <span class="macro">debug</span><span class="macro">!</span>(<span class="ident">target</span>: <span class="string">"rustyline"</span>, <span class="string">"unsupported esc sequence: ESC{:?}{:?}"</span>, <span class="ident">seq1</span>, <span class="ident">seq2</span>); |
| <span class="ident">KeyPress</span>::<span class="ident">UnknownEscSeq</span> |
| } |
| }) |
| } <span class="kw">else</span> { |
| <span class="comment">// TODO ESC-R (r): Undo all changes made to this line.</span> |
| <span class="prelude-val">Ok</span>(<span class="kw">match</span> <span class="ident">seq1</span> { |
| <span class="string">'\x08'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'\x08'</span>), <span class="comment">// Backspace</span> |
| <span class="string">'-'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'-'</span>), |
| <span class="string">'0'</span>...<span class="string">'9'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="ident">seq1</span>), |
| <span class="string">'<'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'<'</span>), |
| <span class="string">'>'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'>'</span>), |
| <span class="string">'b'</span> <span class="op">|</span> <span class="string">'B'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'B'</span>), |
| <span class="string">'c'</span> <span class="op">|</span> <span class="string">'C'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'C'</span>), |
| <span class="string">'d'</span> <span class="op">|</span> <span class="string">'D'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'D'</span>), |
| <span class="string">'f'</span> <span class="op">|</span> <span class="string">'F'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'F'</span>), |
| <span class="string">'l'</span> <span class="op">|</span> <span class="string">'L'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'L'</span>), |
| <span class="string">'n'</span> <span class="op">|</span> <span class="string">'N'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'N'</span>), |
| <span class="string">'p'</span> <span class="op">|</span> <span class="string">'P'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'P'</span>), |
| <span class="string">'t'</span> <span class="op">|</span> <span class="string">'T'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'T'</span>), |
| <span class="string">'u'</span> <span class="op">|</span> <span class="string">'U'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'U'</span>), |
| <span class="string">'y'</span> <span class="op">|</span> <span class="string">'Y'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'Y'</span>), |
| <span class="string">'\x7f'</span> <span class="op">=></span> <span class="ident">KeyPress</span>::<span class="ident">Meta</span>(<span class="string">'\x7f'</span>), <span class="comment">// Delete</span> |
| _ <span class="op">=></span> { |
| <span class="macro">debug</span><span class="macro">!</span>(<span class="ident">target</span>: <span class="string">"rustyline"</span>, <span class="string">"unsupported esc sequence: M-{:?}"</span>, <span class="ident">seq1</span>); |
| <span class="ident">KeyPress</span>::<span class="ident">UnknownEscSeq</span> |
| } |
| }) |
| } |
| } |
| } |
| |
| <span class="kw">impl</span> <span class="ident">RawReader</span> <span class="kw">for</span> <span class="ident">PosixRawReader</span> { |
| <span class="kw">fn</span> <span class="ident">next_key</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">KeyPress</span><span class="op">></span> { |
| <span class="kw">let</span> <span class="ident">c</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">next_char</span>()); |
| |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">key</span> <span class="op">=</span> <span class="ident">consts</span>::<span class="ident">char_to_key_press</span>(<span class="ident">c</span>); |
| <span class="kw">if</span> <span class="ident">key</span> <span class="op">==</span> <span class="ident">KeyPress</span>::<span class="ident">Esc</span> { |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">fds</span> <span class="op">=</span> |
| [<span class="ident">poll</span>::<span class="ident">PollFd</span>::<span class="ident">new</span>(<span class="ident">STDIN_FILENO</span>, <span class="ident">poll</span>::<span class="ident">POLLIN</span>, <span class="ident">poll</span>::<span class="ident">EventFlags</span>::<span class="ident">empty</span>())]; |
| <span class="kw">match</span> <span class="ident">poll</span>::<span class="ident">poll</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">fds</span>, <span class="self">self</span>.<span class="ident">timeout_ms</span>) { |
| <span class="prelude-val">Ok</span>(<span class="ident">n</span>) <span class="kw">if</span> <span class="ident">n</span> <span class="op">==</span> <span class="number">0</span> <span class="op">=></span> { |
| <span class="comment">// single escape</span> |
| } |
| <span class="prelude-val">Ok</span>(_) <span class="op">=></span> { |
| <span class="comment">// escape sequence</span> |
| <span class="ident">key</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="self">self</span>.<span class="ident">escape_sequence</span>()) |
| } |
| <span class="comment">// Err(ref e) if e.kind() == ErrorKind::Interrupted => continue,</span> |
| <span class="prelude-val">Err</span>(<span class="ident">e</span>) <span class="op">=></span> <span class="kw">return</span> <span class="prelude-val">Err</span>(<span class="ident">e</span>.<span class="ident">into</span>()), |
| } |
| } |
| <span class="macro">debug</span><span class="macro">!</span>(<span class="ident">target</span>: <span class="string">"rustyline"</span>, <span class="string">"key: {:?}"</span>, <span class="ident">key</span>); |
| <span class="prelude-val">Ok</span>(<span class="ident">key</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">next_char</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">char</span><span class="op">></span> { |
| <span class="kw">match</span> <span class="self">self</span>.<span class="ident">chars</span>.<span class="ident">next</span>() { |
| <span class="prelude-val">Some</span>(<span class="ident">c</span>) <span class="op">=></span> <span class="prelude-val">Ok</span>(<span class="macro">try</span><span class="macro">!</span>(<span class="ident">c</span>)), |
| <span class="prelude-val">None</span> <span class="op">=></span> <span class="prelude-val">Err</span>(<span class="ident">error</span>::<span class="ident">ReadlineError</span>::<span class="ident">Eof</span>), |
| } |
| } |
| } |
| |
| |
| <span class="kw">static</span> <span class="ident">SIGWINCH_ONCE</span>: <span class="ident">sync</span>::<span class="ident">Once</span> <span class="op">=</span> <span class="ident">sync</span>::<span class="ident">ONCE_INIT</span>; |
| <span class="kw">static</span> <span class="ident">SIGWINCH</span>: <span class="ident">atomic</span>::<span class="ident">AtomicBool</span> <span class="op">=</span> <span class="ident">atomic</span>::<span class="ident">ATOMIC_BOOL_INIT</span>; |
| |
| <span class="kw">fn</span> <span class="ident">install_sigwinch_handler</span>() { |
| <span class="ident">SIGWINCH_ONCE</span>.<span class="ident">call_once</span>(<span class="op">||</span> <span class="kw">unsafe</span> { |
| <span class="kw">let</span> <span class="ident">sigwinch</span> <span class="op">=</span> <span class="ident">signal</span>::<span class="ident">SigAction</span>::<span class="ident">new</span>(<span class="ident">signal</span>::<span class="ident">SigHandler</span>::<span class="ident">Handler</span>(<span class="ident">sigwinch_handler</span>), |
| <span class="ident">signal</span>::<span class="ident">SaFlags</span>::<span class="ident">empty</span>(), |
| <span class="ident">signal</span>::<span class="ident">SigSet</span>::<span class="ident">empty</span>()); |
| <span class="kw">let</span> _ <span class="op">=</span> <span class="ident">signal</span>::<span class="ident">sigaction</span>(<span class="ident">signal</span>::<span class="ident">SIGWINCH</span>, <span class="kw-2">&</span><span class="ident">sigwinch</span>); |
| }); |
| } |
| |
| <span class="kw">extern</span> <span class="string">"C"</span> <span class="kw">fn</span> <span class="ident">sigwinch_handler</span>(_: <span class="ident">libc</span>::<span class="ident">c_int</span>) { |
| <span class="ident">SIGWINCH</span>.<span class="ident">store</span>(<span class="bool-val">true</span>, <span class="ident">atomic</span>::<span class="ident">Ordering</span>::<span class="ident">SeqCst</span>); |
| <span class="macro">debug</span><span class="macro">!</span>(<span class="ident">target</span>: <span class="string">"rustyline"</span>, <span class="string">"SIGWINCH"</span>); |
| } |
| |
| <span class="kw">pub</span> <span class="kw">type</span> <span class="ident">Terminal</span> <span class="op">=</span> <span class="ident">PosixTerminal</span>; |
| |
| <span class="attribute">#[<span class="ident">derive</span>(<span class="ident">Clone</span>,<span class="ident">Debug</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">struct</span> <span class="ident">PosixTerminal</span> { |
| <span class="ident">unsupported</span>: <span class="ident">bool</span>, |
| <span class="ident">stdin_isatty</span>: <span class="ident">bool</span>, |
| } |
| |
| <span class="kw">impl</span> <span class="ident">Term</span> <span class="kw">for</span> <span class="ident">PosixTerminal</span> { |
| <span class="kw">type</span> <span class="ident">Reader</span> <span class="op">=</span> <span class="ident">PosixRawReader</span>; |
| <span class="kw">type</span> <span class="ident">Writer</span> <span class="op">=</span> <span class="ident">Stdout</span>; |
| <span class="kw">type</span> <span class="ident">Mode</span> <span class="op">=</span> <span class="ident">Mode</span>; |
| |
| <span class="kw">fn</span> <span class="ident">new</span>() <span class="op">-></span> <span class="ident">PosixTerminal</span> { |
| <span class="kw">let</span> <span class="ident">term</span> <span class="op">=</span> <span class="ident">PosixTerminal</span> { |
| <span class="ident">unsupported</span>: <span class="ident">is_unsupported_term</span>(), |
| <span class="ident">stdin_isatty</span>: <span class="ident">is_a_tty</span>(<span class="ident">STDIN_FILENO</span>), |
| }; |
| <span class="kw">if</span> <span class="op">!</span><span class="ident">term</span>.<span class="ident">unsupported</span> <span class="op">&&</span> <span class="ident">term</span>.<span class="ident">stdin_isatty</span> <span class="op">&&</span> <span class="ident">is_a_tty</span>(<span class="ident">STDOUT_FILENO</span>) { |
| <span class="ident">install_sigwinch_handler</span>(); |
| } |
| <span class="ident">term</span> |
| } |
| |
| <span class="comment">// Init checks:</span> |
| |
| <span class="doccomment">/// Check if current terminal can provide a rich line-editing user interface.</span> |
| <span class="kw">fn</span> <span class="ident">is_unsupported</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">unsupported</span> |
| } |
| |
| <span class="doccomment">/// check if stdin is connected to a terminal.</span> |
| <span class="kw">fn</span> <span class="ident">is_stdin_tty</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="self">self</span>.<span class="ident">stdin_isatty</span> |
| } |
| |
| <span class="comment">// Interactive loop:</span> |
| |
| <span class="doccomment">/// Try to get the number of columns in the current terminal,</span> |
| <span class="doccomment">/// or assume 80 if it fails.</span> |
| <span class="kw">fn</span> <span class="ident">get_columns</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="kw">let</span> (<span class="ident">cols</span>, _) <span class="op">=</span> <span class="ident">get_win_size</span>(); |
| <span class="ident">cols</span> |
| } |
| |
| <span class="doccomment">/// Try to get the number of rows in the current terminal,</span> |
| <span class="doccomment">/// or assume 24 if it fails.</span> |
| <span class="kw">fn</span> <span class="ident">get_rows</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">usize</span> { |
| <span class="kw">let</span> (_, <span class="ident">rows</span>) <span class="op">=</span> <span class="ident">get_win_size</span>(); |
| <span class="ident">rows</span> |
| } |
| |
| <span class="kw">fn</span> <span class="ident">enable_raw_mode</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">Mode</span><span class="op">></span> { |
| <span class="kw">use</span> <span class="ident">nix</span>::<span class="ident">errno</span>::<span class="ident">Errno</span>::<span class="ident">ENOTTY</span>; |
| <span class="kw">use</span> <span class="ident">nix</span>::<span class="ident">sys</span>::<span class="ident">termios</span>::{<span class="ident">BRKINT</span>, <span class="ident">CS8</span>, <span class="ident">ECHO</span>, <span class="ident">ICANON</span>, <span class="ident">ICRNL</span>, <span class="ident">IEXTEN</span>, <span class="ident">INPCK</span>, <span class="ident">ISIG</span>, <span class="ident">ISTRIP</span>, |
| <span class="ident">IXON</span>, <span class="comment">/* OPOST, */</span> <span class="ident">VMIN</span>, <span class="ident">VTIME</span>}; |
| <span class="kw">if</span> <span class="op">!</span><span class="self">self</span>.<span class="ident">stdin_isatty</span> { |
| <span class="macro">try</span><span class="macro">!</span>(<span class="prelude-val">Err</span>(<span class="ident">nix</span>::<span class="ident">Error</span>::<span class="ident">from_errno</span>(<span class="ident">ENOTTY</span>))); |
| } |
| <span class="kw">let</span> <span class="ident">original_mode</span> <span class="op">=</span> <span class="macro">try</span><span class="macro">!</span>(<span class="ident">termios</span>::<span class="ident">tcgetattr</span>(<span class="ident">STDIN_FILENO</span>)); |
| <span class="kw">let</span> <span class="kw-2">mut</span> <span class="ident">raw</span> <span class="op">=</span> <span class="ident">original_mode</span>; |
| <span class="comment">// disable BREAK interrupt, CR to NL conversion on input,</span> |
| <span class="comment">// input parity check, strip high bit (bit 8), output flow control</span> |
| <span class="ident">raw</span>.<span class="ident">c_iflag</span> <span class="op">&=</span> <span class="op">!</span>(<span class="ident">BRKINT</span> <span class="op">|</span> <span class="ident">ICRNL</span> <span class="op">|</span> <span class="ident">INPCK</span> <span class="op">|</span> <span class="ident">ISTRIP</span> <span class="op">|</span> <span class="ident">IXON</span>); |
| <span class="comment">// we don't want raw output, it turns newlines into straight linefeeds</span> |
| <span class="comment">// raw.c_oflag = raw.c_oflag & !(OPOST); // disable all output processing</span> |
| <span class="ident">raw</span>.<span class="ident">c_cflag</span> <span class="op">|=</span> <span class="ident">CS8</span>; <span class="comment">// character-size mark (8 bits)</span> |
| <span class="comment">// disable echoing, canonical mode, extended input processing and signals</span> |
| <span class="ident">raw</span>.<span class="ident">c_lflag</span> <span class="op">&=</span> <span class="op">!</span>(<span class="ident">ECHO</span> <span class="op">|</span> <span class="ident">ICANON</span> <span class="op">|</span> <span class="ident">IEXTEN</span> <span class="op">|</span> <span class="ident">ISIG</span>); |
| <span class="ident">raw</span>.<span class="ident">c_cc</span>[<span class="ident">VMIN</span>] <span class="op">=</span> <span class="number">1</span>; <span class="comment">// One character-at-a-time input</span> |
| <span class="ident">raw</span>.<span class="ident">c_cc</span>[<span class="ident">VTIME</span>] <span class="op">=</span> <span class="number">0</span>; <span class="comment">// with blocking read</span> |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">termios</span>::<span class="ident">tcsetattr</span>(<span class="ident">STDIN_FILENO</span>, <span class="ident">termios</span>::<span class="ident">TCSADRAIN</span>, <span class="kw-2">&</span><span class="ident">raw</span>)); |
| <span class="prelude-val">Ok</span>(<span class="ident">original_mode</span>) |
| } |
| |
| <span class="doccomment">/// Create a RAW reader</span> |
| <span class="kw">fn</span> <span class="ident">create_reader</span>(<span class="kw-2">&</span><span class="self">self</span>, <span class="ident">config</span>: <span class="kw-2">&</span><span class="ident">Config</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span><span class="ident">PosixRawReader</span><span class="op">></span> { |
| <span class="ident">PosixRawReader</span>::<span class="ident">new</span>(<span class="ident">config</span>) |
| } |
| |
| <span class="kw">fn</span> <span class="ident">create_writer</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">Stdout</span> { |
| <span class="ident">io</span>::<span class="ident">stdout</span>() |
| } |
| |
| <span class="doccomment">/// Check if a SIGWINCH signal has been received</span> |
| <span class="kw">fn</span> <span class="ident">sigwinch</span>(<span class="kw-2">&</span><span class="self">self</span>) <span class="op">-></span> <span class="ident">bool</span> { |
| <span class="ident">SIGWINCH</span>.<span class="ident">compare_and_swap</span>(<span class="bool-val">true</span>, <span class="bool-val">false</span>, <span class="ident">atomic</span>::<span class="ident">Ordering</span>::<span class="ident">SeqCst</span>) |
| } |
| |
| <span class="doccomment">/// Clear the screen. Used to handle ctrl+l</span> |
| <span class="kw">fn</span> <span class="ident">clear_screen</span>(<span class="kw-2">&</span><span class="kw-2">mut</span> <span class="self">self</span>, <span class="ident">w</span>: <span class="kw-2">&</span><span class="kw-2">mut</span> <span class="ident">Write</span>) <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">w</span>.<span class="ident">write_all</span>(<span class="string">b"\x1b[H\x1b[2J"</span>)); |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">w</span>.<span class="ident">flush</span>()); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">unix</span>)]</span> |
| <span class="kw">pub</span> <span class="kw">fn</span> <span class="ident">suspend</span>() <span class="op">-></span> <span class="prelude-ty">Result</span><span class="op"><</span>()<span class="op">></span> { |
| <span class="comment">// For macos:</span> |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">signal</span>::<span class="ident">kill</span>(<span class="ident">nix</span>::<span class="ident">unistd</span>::<span class="ident">getppid</span>(), <span class="ident">signal</span>::<span class="ident">SIGTSTP</span>)); |
| <span class="macro">try</span><span class="macro">!</span>(<span class="ident">signal</span>::<span class="ident">kill</span>(<span class="ident">nix</span>::<span class="ident">unistd</span>::<span class="ident">getpid</span>(), <span class="ident">signal</span>::<span class="ident">SIGTSTP</span>)); |
| <span class="prelude-val">Ok</span>(()) |
| } |
| |
| <span class="attribute">#[<span class="ident">cfg</span>(<span class="ident">all</span>(<span class="ident">unix</span>,<span class="ident">test</span>))]</span> |
| <span class="kw">mod</span> <span class="ident">test</span> { |
| <span class="attribute">#[<span class="ident">test</span>]</span> |
| <span class="kw">fn</span> <span class="ident">test_unsupported_term</span>() { |
| ::<span class="ident">std</span>::<span class="ident">env</span>::<span class="ident">set_var</span>(<span class="string">"TERM"</span>, <span class="string">"xterm"</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="bool-val">false</span>, <span class="kw">super</span>::<span class="ident">is_unsupported_term</span>()); |
| |
| ::<span class="ident">std</span>::<span class="ident">env</span>::<span class="ident">set_var</span>(<span class="string">"TERM"</span>, <span class="string">"dumb"</span>); |
| <span class="macro">assert_eq</span><span class="macro">!</span>(<span class="bool-val">true</span>, <span class="kw">super</span>::<span class="ident">is_unsupported_term</span>()); |
| } |
| } |
| </pre> |
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