mirror of
https://github.com/ghostty-org/ghostty.git
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a3696a9185
These OSC commands report the default foreground and background colors. Most terminals return the RGB components scaled up to 16-bit components, because some legacy software are unable to read 8-bit components. The PR follows this conventions. iTerm2 allow 8-bit reporting through a config option, and a similar option is added here. In addition to picking between scaled and unscaled reporting, the user can also turn off OSC 10/11 replies altogether. Scaling is essentially c / 1 * 65535, where c is the 8-bit component, and reporting is left-padded with zeros if necessary. This format appears to stem from the XParseColor format.
795 lines
25 KiB
Zig
795 lines
25 KiB
Zig
//! OSC (Operating System Command) related functions and types. OSC is
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//! another set of control sequences for terminal programs that start with
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//! "ESC ]". Unlike CSI or standard ESC sequences, they may contain strings
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//! and other irregular formatting so a dedicated parser is created to handle it.
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const osc = @This();
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const std = @import("std");
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const mem = std.mem;
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const log = std.log.scoped(.osc);
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pub const Command = union(enum) {
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/// Set the window title of the terminal
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///
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/// If title mode 0 is set text is expect to be hex encoded (i.e. utf-8
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/// with each code unit further encoded with two hex digets).
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///
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/// If title mode 2 is set or the terminal is setup for unconditional
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/// utf-8 titles text is interpreted as utf-8. Else text is interpreted
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/// as latin1.
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change_window_title: []const u8,
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/// First do a fresh-line. Then start a new command, and enter prompt mode:
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/// Subsequent text (until a OSC "133;B" or OSC "133;I" command) is a
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/// prompt string (as if followed by OSC 133;P;k=i\007). Note: I've noticed
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/// not all shells will send the prompt end code.
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prompt_start: struct {
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aid: ?[]const u8 = null,
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kind: enum { primary, right, continuation } = .primary,
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redraw: bool = true,
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},
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/// End of prompt and start of user input, terminated by a OSC "133;C"
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/// or another prompt (OSC "133;P").
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prompt_end: void,
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/// The OSC "133;C" command can be used to explicitly end
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/// the input area and begin the output area. However, some applications
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/// don't provide a convenient way to emit that command.
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/// That is why we also specify an implicit way to end the input area
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/// at the end of the line. In the case of multiple input lines: If the
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/// cursor is on a fresh (empty) line and we see either OSC "133;P" or
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/// OSC "133;I" then this is the start of a continuation input line.
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/// If we see anything else, it is the start of the output area (or end
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/// of command).
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end_of_input: void,
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/// End of current command.
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///
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/// The exit-code need not be specified if if there are no options,
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/// or if the command was cancelled (no OSC "133;C"), such as by typing
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/// an interrupt/cancel character (typically ctrl-C) during line-editing.
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/// Otherwise, it must be an integer code, where 0 means the command
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/// succeeded, and other values indicate failure. In additing to the
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/// exit-code there may be an err= option, which non-legacy terminals
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/// should give precedence to. The err=_value_ option is more general:
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/// an empty string is success, and any non-empty value (which need not
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/// be an integer) is an error code. So to indicate success both ways you
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/// could send OSC "133;D;0;err=\007", though `OSC "133;D;0\007" is shorter.
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end_of_command: struct {
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exit_code: ?u8 = null,
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// TODO: err option
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},
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/// Reset the color for the cursor. This reverts changes made with
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/// change/read cursor color.
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reset_cursor_color: void,
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/// Set or get clipboard contents. If data is null, then the current
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/// clipboard contents are sent to the pty. If data is set, this
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/// contents is set on the clipboard.
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clipboard_contents: struct {
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kind: u8,
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data: []const u8,
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},
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/// OSC 7. Reports the current working directory of the shell. This is
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/// a moderately flawed escape sequence but one that many major terminals
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/// support so we also support it. To understand the flaws, read through
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/// this terminal-wg issue: https://gitlab.freedesktop.org/terminal-wg/specifications/-/issues/20
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report_pwd: struct {
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/// The reported pwd value. This is not checked for validity. It should
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/// be a file URL but it is up to the caller to utilize this value.
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value: []const u8,
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},
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<<<<<<< HEAD
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/// OSC 22. Set the mouse shape. There doesn't seem to be a standard
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/// naming scheme for cursors but it looks like terminals such as Foot
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/// are moving towards using the W3C CSS cursor names. For OSC parsing,
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/// we just parse whatever string is given.
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mouse_shape: struct {
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value: []const u8,
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},
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/// OSC 10 and OSC 11 default color report.
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report_default_color: struct {
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/// OSC 10 requests the foreground color, OSC 11 the background color.
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kind: enum { foreground, background },
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/// We must reply with the same string terminator (ST) as used in the
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/// request. This is either ESC\ or BEL (0x07)
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string_terminator: ?[]const u8 = null,
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},
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};
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pub const Parser = struct {
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/// Current state of the parser.
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state: State = .empty,
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/// Current command of the parser, this accumulates.
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command: Command = undefined,
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/// Buffer that stores the input we see for a single OSC command.
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/// Slices in Command are offsets into this buffer.
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buf: [MAX_BUF]u8 = undefined,
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buf_start: usize = 0,
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buf_idx: usize = 0,
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/// True when a command is complete/valid to return.
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complete: bool = false,
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/// Temporary state that is dependent on the current state.
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temp_state: union {
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/// Current string parameter being populated
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str: *[]const u8,
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/// Current numeric parameter being populated
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num: u16,
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/// Temporary state for key/value pairs
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key: []const u8,
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} = undefined,
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// Maximum length of a single OSC command. This is the full OSC command
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// sequence length (excluding ESC ]). This is arbitrary, I couldn't find
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// any definitive resource on how long this should be.
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const MAX_BUF = 2048;
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pub const State = enum {
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empty,
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invalid,
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// Command prefixes. We could just accumulate and compare (mem.eql)
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// but the state space is small enough that we just build it up this way.
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@"0",
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@"1",
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@"10",
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@"11",
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@"13",
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@"133",
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@"2",
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@"22",
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@"5",
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@"52",
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@"7",
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// OSC 10 is used to query the default foreground color, and to set the default foreground color.
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// Only querying is currently supported.
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osc_10,
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// OSC 11 is used to query the default background color, and to set the default background color.
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// Only querying is currently supported.
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osc_11,
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// We're in a semantic prompt OSC command but we aren't sure
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// what the command is yet, i.e. `133;`
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semantic_prompt,
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semantic_option_start,
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semantic_option_key,
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semantic_option_value,
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semantic_exit_code_start,
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semantic_exit_code,
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// Get/set clipboard states
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clipboard_kind,
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clipboard_kind_end,
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// Expect a string parameter. param_str must be set as well as
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// buf_start.
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string,
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};
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/// Reset the parser start.
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pub fn reset(self: *Parser) void {
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self.state = .empty;
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self.buf_start = 0;
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self.buf_idx = 0;
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self.complete = false;
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}
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/// Consume the next character c and advance the parser state.
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pub fn next(self: *Parser, c: u8) void {
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// If our buffer is full then we're invalid.
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if (self.buf_idx >= self.buf.len) {
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self.state = .invalid;
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return;
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}
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// We store everything in the buffer so we can do a better job
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// logging if we get to an invalid command.
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self.buf[self.buf_idx] = c;
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self.buf_idx += 1;
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// log.warn("state = {} c = {x}", .{ self.state, c });
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switch (self.state) {
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// If we get something during the invalid state, we've
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// ruined our entry.
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.invalid => self.complete = false,
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.empty => switch (c) {
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'0' => self.state = .@"0",
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'1' => self.state = .@"1",
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'2' => self.state = .@"2",
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'5' => self.state = .@"5",
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'7' => self.state = .@"7",
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else => self.state = .invalid,
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},
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.@"0" => switch (c) {
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';' => {
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self.command = .{ .change_window_title = undefined };
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self.state = .string;
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self.temp_state = .{ .str = &self.command.change_window_title };
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self.buf_start = self.buf_idx;
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},
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else => self.state = .invalid,
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},
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.@"1" => switch (c) {
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'0' => self.state = .@"10",
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'1' => self.state = .@"11",
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'3' => self.state = .@"13",
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else => self.state = .invalid,
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},
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.@"10" => switch (c) {
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';' => {
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self.state = .osc_10;
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},
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else => self.state = .invalid,
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},
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.@"11" => switch (c) {
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';' => {
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self.state = .osc_11;
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},
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'2' => {
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self.complete = true;
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self.command = .{ .reset_cursor_color = {} };
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self.state = .invalid;
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},
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else => self.state = .invalid,
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},
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.@"13" => switch (c) {
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'3' => self.state = .@"133",
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else => self.state = .invalid,
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},
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.@"133" => switch (c) {
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';' => self.state = .semantic_prompt,
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else => self.state = .invalid,
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},
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.@"2" => switch (c) {
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'2' => self.state = .@"22",
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';' => {
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self.command = .{ .change_window_title = undefined };
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self.state = .string;
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self.temp_state = .{ .str = &self.command.change_window_title };
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self.buf_start = self.buf_idx;
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},
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else => self.state = .invalid,
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},
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.@"22" => switch (c) {
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';' => {
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self.command = .{ .mouse_shape = undefined };
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self.state = .string;
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self.temp_state = .{ .str = &self.command.mouse_shape.value };
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self.buf_start = self.buf_idx;
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},
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else => self.state = .invalid,
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},
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.@"5" => switch (c) {
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'2' => self.state = .@"52",
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else => self.state = .invalid,
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},
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.@"7" => switch (c) {
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';' => {
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self.command = .{ .report_pwd = .{ .value = "" } };
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self.state = .string;
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self.temp_state = .{ .str = &self.command.report_pwd.value };
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self.buf_start = self.buf_idx;
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},
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else => self.state = .invalid,
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},
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.@"52" => switch (c) {
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';' => {
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self.command = .{ .clipboard_contents = undefined };
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self.state = .clipboard_kind;
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},
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else => self.state = .invalid,
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},
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.clipboard_kind => switch (c) {
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';' => {
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self.command.clipboard_contents.kind = 'c';
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self.state = .string;
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self.temp_state = .{ .str = &self.command.clipboard_contents.data };
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self.buf_start = self.buf_idx;
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},
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else => {
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self.command.clipboard_contents.kind = c;
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self.state = .clipboard_kind_end;
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},
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},
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.clipboard_kind_end => switch (c) {
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';' => {
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self.state = .string;
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self.temp_state = .{ .str = &self.command.clipboard_contents.data };
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self.buf_start = self.buf_idx;
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},
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else => self.state = .invalid,
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},
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.osc_10 => switch (c) {
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'?' => {
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self.command = .{ .report_default_color = .{ .kind = .foreground } };
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self.complete = true;
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},
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else => self.state = .invalid,
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},
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.osc_11 => switch (c) {
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'?' => {
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self.command = .{ .report_default_color = .{ .kind = .background } };
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self.complete = true;
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},
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else => self.state = .invalid,
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},
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.semantic_prompt => switch (c) {
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'A' => {
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self.state = .semantic_option_start;
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self.command = .{ .prompt_start = .{} };
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self.complete = true;
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},
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'B' => {
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self.state = .semantic_option_start;
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self.command = .{ .prompt_end = {} };
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self.complete = true;
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},
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'C' => {
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self.state = .semantic_option_start;
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self.command = .{ .end_of_input = {} };
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self.complete = true;
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},
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'D' => {
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self.state = .semantic_exit_code_start;
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self.command = .{ .end_of_command = .{} };
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self.complete = true;
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},
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else => self.state = .invalid,
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},
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.semantic_option_start => switch (c) {
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';' => {
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self.state = .semantic_option_key;
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self.buf_start = self.buf_idx;
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},
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else => self.state = .invalid,
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},
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.semantic_option_key => switch (c) {
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'=' => {
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self.temp_state = .{ .key = self.buf[self.buf_start .. self.buf_idx - 1] };
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self.state = .semantic_option_value;
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self.buf_start = self.buf_idx;
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},
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else => {},
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},
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.semantic_option_value => switch (c) {
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';' => {
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self.endSemanticOptionValue();
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self.state = .semantic_option_key;
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self.buf_start = self.buf_idx;
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},
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else => {},
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},
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.semantic_exit_code_start => switch (c) {
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';' => {
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// No longer complete, if ';' shows up we expect some code.
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self.complete = false;
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self.state = .semantic_exit_code;
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self.temp_state = .{ .num = 0 };
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self.buf_start = self.buf_idx;
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},
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else => self.state = .invalid,
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},
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.semantic_exit_code => switch (c) {
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'0', '1', '2', '3', '4', '5', '6', '7', '8', '9' => {
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self.complete = true;
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const idx = self.buf_idx - self.buf_start;
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if (idx > 0) self.temp_state.num *|= 10;
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self.temp_state.num +|= c - '0';
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},
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';' => {
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self.endSemanticExitCode();
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self.state = .semantic_option_key;
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self.buf_start = self.buf_idx;
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},
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else => self.state = .invalid,
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},
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.string => self.complete = true,
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}
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}
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fn endSemanticOptionValue(self: *Parser) void {
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const value = self.buf[self.buf_start..self.buf_idx];
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if (mem.eql(u8, self.temp_state.key, "aid")) {
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switch (self.command) {
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.prompt_start => |*v| v.aid = value,
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else => {},
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}
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} else if (mem.eql(u8, self.temp_state.key, "redraw")) {
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// Kitty supports a "redraw" option for prompt_start. I can't find
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// this documented anywhere but can see in the code that this is used
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// by shell environments to tell the terminal that the shell will NOT
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// redraw the prompt so we should attempt to resize it.
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switch (self.command) {
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.prompt_start => |*v| {
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const valid = if (value.len == 1) valid: {
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switch (value[0]) {
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'0' => v.redraw = false,
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'1' => v.redraw = true,
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else => break :valid false,
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}
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break :valid true;
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} else false;
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if (!valid) {
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log.info("OSC 133 A invalid redraw value: {s}", .{value});
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}
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},
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else => {},
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}
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} else if (mem.eql(u8, self.temp_state.key, "k")) {
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// The "k" marks the kind of prompt, or "primary" if we don't know.
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// This can be used to distinguish between the first prompt,
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// a continuation, etc.
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switch (self.command) {
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.prompt_start => |*v| if (value.len == 1) {
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v.kind = switch (value[0]) {
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'c', 's' => .continuation,
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'r' => .right,
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'i' => .primary,
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else => .primary,
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};
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},
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else => {},
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}
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} else log.info("unknown semantic prompts option: {s}", .{self.temp_state.key});
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}
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fn endSemanticExitCode(self: *Parser) void {
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switch (self.command) {
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.end_of_command => |*v| v.exit_code = @truncate(self.temp_state.num),
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else => {},
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}
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}
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fn endString(self: *Parser) void {
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self.temp_state.str.* = self.buf[self.buf_start..self.buf_idx];
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}
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|
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/// End the sequence and return the command, if any. If the return value
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/// is null, then no valid command was found.
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|
pub fn end(self: *Parser) ?Command {
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if (!self.complete) {
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log.warn("invalid OSC command: {s}", .{self.buf[0..self.buf_idx]});
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return null;
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}
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// Other cleanup we may have to do depending on state.
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switch (self.state) {
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.semantic_exit_code => self.endSemanticExitCode(),
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.semantic_option_value => self.endSemanticOptionValue(),
|
|
.string => self.endString(),
|
|
else => {},
|
|
}
|
|
|
|
return self.command;
|
|
}
|
|
|
|
/// End the sequence and return the command, if any. If the return value
|
|
/// is null, then no valid command was found. The provided `string_terminator`
|
|
/// character originates from the request. This way we can use the same
|
|
/// terminator in the reply, which would otherwise break applications that
|
|
/// don't consider both options.
|
|
pub fn endWithStringTerminator(self: *Parser, string_separator: u8) ?Command {
|
|
var maybe_cmd = self.end();
|
|
if (maybe_cmd) |*cmd| {
|
|
switch (cmd.*) {
|
|
.report_default_color => |*c| {
|
|
c.string_terminator = if (string_separator == 0x07) "\x07" else "\x1b\\";
|
|
},
|
|
else => {},
|
|
}
|
|
}
|
|
return maybe_cmd;
|
|
}
|
|
};
|
|
|
|
test "OSC: change_window_title" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
p.next('0');
|
|
p.next(';');
|
|
p.next('a');
|
|
p.next('b');
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .change_window_title);
|
|
try testing.expectEqualStrings("ab", cmd.change_window_title);
|
|
}
|
|
|
|
test "OSC: change_window_title with 2" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
p.next('2');
|
|
p.next(';');
|
|
p.next('a');
|
|
p.next('b');
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .change_window_title);
|
|
try testing.expectEqualStrings("ab", cmd.change_window_title);
|
|
}
|
|
|
|
test "OSC: prompt_start" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "133;A";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .prompt_start);
|
|
try testing.expect(cmd.prompt_start.aid == null);
|
|
try testing.expect(cmd.prompt_start.redraw);
|
|
}
|
|
|
|
test "OSC: prompt_start with single option" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "133;A;aid=14";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .prompt_start);
|
|
try testing.expectEqualStrings("14", cmd.prompt_start.aid.?);
|
|
}
|
|
|
|
test "OSC: prompt_start with redraw disabled" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "133;A;redraw=0";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .prompt_start);
|
|
try testing.expect(!cmd.prompt_start.redraw);
|
|
}
|
|
|
|
test "OSC: prompt_start with redraw invalid value" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "133;A;redraw=42";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .prompt_start);
|
|
try testing.expect(cmd.prompt_start.redraw);
|
|
try testing.expect(cmd.prompt_start.kind == .primary);
|
|
}
|
|
|
|
test "OSC: prompt_start with continuation" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "133;A;k=c";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .prompt_start);
|
|
try testing.expect(cmd.prompt_start.kind == .continuation);
|
|
}
|
|
|
|
test "OSC: end_of_command no exit code" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "133;D";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .end_of_command);
|
|
}
|
|
|
|
test "OSC: end_of_command with exit code" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "133;D;25";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .end_of_command);
|
|
try testing.expectEqual(@as(u8, 25), cmd.end_of_command.exit_code.?);
|
|
}
|
|
|
|
test "OSC: prompt_end" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "133;B";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .prompt_end);
|
|
}
|
|
|
|
test "OSC: end_of_input" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "133;C";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .end_of_input);
|
|
}
|
|
|
|
test "OSC: reset_cursor_color" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "112";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .reset_cursor_color);
|
|
}
|
|
|
|
test "OSC: get/set clipboard" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "52;s;?";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .clipboard_contents);
|
|
try testing.expect(cmd.clipboard_contents.kind == 's');
|
|
try testing.expect(std.mem.eql(u8, "?", cmd.clipboard_contents.data));
|
|
}
|
|
|
|
test "OSC: get/set clipboard (optional parameter)" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "52;;?";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .clipboard_contents);
|
|
try testing.expect(cmd.clipboard_contents.kind == 'c');
|
|
try testing.expect(std.mem.eql(u8, "?", cmd.clipboard_contents.data));
|
|
}
|
|
|
|
test "OSC: report pwd" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "7;file:///tmp/example";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .report_pwd);
|
|
try testing.expect(std.mem.eql(u8, "file:///tmp/example", cmd.report_pwd.value));
|
|
}
|
|
|
|
test "OSC: pointer cursor" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "22;pointer";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
const cmd = p.end().?;
|
|
try testing.expect(cmd == .mouse_shape);
|
|
try testing.expect(std.mem.eql(u8, "pointer", cmd.mouse_shape.value));
|
|
}
|
|
|
|
test "OSC: report pwd empty" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "7;";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
try testing.expect(p.end() == null);
|
|
}
|
|
|
|
test "OSC: longer than buffer" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "a" ** (Parser.MAX_BUF + 2);
|
|
for (input) |ch| p.next(ch);
|
|
|
|
try testing.expect(p.end() == null);
|
|
}
|
|
|
|
test "OSC: report default foreground color" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "10;?";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
// This corresponds to ST = ESC \
|
|
const cmd = p.endWithStringTerminator('\x1b').?;
|
|
try testing.expect(cmd == .report_default_color);
|
|
try testing.expect(cmd.report_default_color.kind == .foreground);
|
|
try testing.expectEqualSlices(u8, cmd.report_default_color.string_terminator.?, "\x1b\\");
|
|
}
|
|
|
|
test "OSC: report default background color" {
|
|
const testing = std.testing;
|
|
|
|
var p: Parser = .{};
|
|
|
|
const input = "11;?";
|
|
for (input) |ch| p.next(ch);
|
|
|
|
// This corresponds to ST = BELL
|
|
const cmd = p.endWithStringTerminator('\x07').?;
|
|
try testing.expect(cmd == .report_default_color);
|
|
try testing.expect(cmd.report_default_color.kind == .background);
|
|
try testing.expectEqualSlices(u8, cmd.report_default_color.string_terminator.?, "\x07");
|
|
}
|