terminal/osc: boilerplate new OSC 133 parsing

src/terminal/osc.zig

@@ -41,6 +41,9 @@ pub const Command = union(Key) {
     /// in the log.
     change_window_icon: [:0]const u8,
 
+    /// Semantic prompt command: https://gitlab.freedesktop.org/Per_Bothner/specifications/blob/master/proposals/semantic-prompts.md
+    semantic_prompt: parsers.semantic_prompt2.Command,
+
     /// First do a fresh-line. Then start a new command, and enter prompt mode:
     /// Subsequent text (until a OSC "133;B" or OSC "133;I" command) is a
     /// prompt string (as if followed by OSC 133;P;k=i\007). Note: I've noticed
@@ -225,6 +228,7 @@ pub const Command = union(Key) {
             "invalid",
             "change_window_title",
             "change_window_icon",
+            "semantic_prompt",
             "prompt_start",
             "prompt_end",
             "end_of_input",
@@ -469,6 +473,7 @@ pub const Parser = struct {
             .prompt_end,
             .prompt_start,
             .report_pwd,
+            .semantic_prompt,
             .show_desktop_notification,
             .kitty_text_sizing,
             => {},
@@ -751,7 +756,7 @@ pub const Parser = struct {
 
             .@"77" => null,
 
-            .@"133" => parsers.semantic_prompt.parse(self, terminator_ch),
+            .@"133" => parsers.semantic_prompt2.parse(self, terminator_ch),
 
             .@"777" => parsers.rxvt_extension.parse(self, terminator_ch),
 

src/terminal/osc/parsers.zig

@@ -13,19 +13,8 @@ pub const osc9 = @import("parsers/osc9.zig");
 pub const report_pwd = @import("parsers/report_pwd.zig");
 pub const rxvt_extension = @import("parsers/rxvt_extension.zig");
 pub const semantic_prompt = @import("parsers/semantic_prompt.zig");
+pub const semantic_prompt2 = @import("parsers/semantic_prompt2.zig");
 
 test {
-    _ = change_window_icon;
-    _ = change_window_title;
-    _ = clipboard_operation;
-    _ = color;
-    _ = hyperlink;
-    _ = iterm2;
-    _ = kitty_color;
-    _ = kitty_text_sizing;
-    _ = mouse_shape;
-    _ = osc9;
-    _ = report_pwd;
-    _ = rxvt_extension;
-    _ = semantic_prompt;
+    std.testing.refAllDecls(@This());
 }

src/terminal/osc/parsers/semantic_prompt.zig

@@ -1,7 +1,6 @@
+//! https://gitlab.freedesktop.org/Per_Bothner/specifications/blob/master/proposals/semantic-prompts.md
 const std = @import("std");
-
 const string_encoding = @import("../../../os/string_encoding.zig");
-
 const Parser = @import("../../osc.zig").Parser;
 const Command = @import("../../osc.zig").Command;
 

src/terminal/osc/parsers/semantic_prompt2.zig

@@ -0,0 +1,92 @@
+//! https://gitlab.freedesktop.org/Per_Bothner/specifications/blob/master/proposals/semantic-prompts.md
+const std = @import("std");
+const Parser = @import("../../osc.zig").Parser;
+const OSCCommand = @import("../../osc.zig").Command;
+
+const log = std.log.scoped(.osc_semantic_prompt);
+
+pub const Command = union(enum) {
+    fresh_line,
+    fresh_line_new_prompt: Options,
+};
+
+pub const Options = struct {
+    aid: ?[:0]const u8,
+    cl: ?Click,
+    // TODO: more
+
+    pub const init: Options = .{
+        .aid = null,
+        .click = null,
+    };
+};
+
+pub const Click = enum {
+    line,
+    multiple,
+    conservative_vertical,
+    smart_vertical,
+};
+
+/// Parse OSC 133, semantic prompts
+pub fn parse(parser: *Parser, _: ?u8) ?*OSCCommand {
+    const writer = parser.writer orelse {
+        parser.state = .invalid;
+        return null;
+    };
+    const data = writer.buffered();
+    if (data.len == 0) {
+        parser.state = .invalid;
+        return null;
+    }
+
+    parser.command = command: {
+        parse: switch (data[0]) {
+            'L' => {
+                if (data.len > 1) break :parse;
+                break :command .{ .semantic_prompt = .fresh_line };
+            },
+
+            else => {},
+        }
+
+        // Any fallthroughs are invalid
+        parser.state = .invalid;
+        return null;
+    };
+
+    return &parser.command;
+}
+
+test "OSC 133: fresh_line" {
+    const testing = std.testing;
+
+    var p: Parser = .init(null);
+
+    const input = "133;L";
+    for (input) |ch| p.next(ch);
+
+    const cmd = p.end(null).?.*;
+    try testing.expect(cmd == .semantic_prompt);
+    try testing.expect(cmd.semantic_prompt == .fresh_line);
+}
+
+test "OSC 133: fresh_line extra contents" {
+    const testing = std.testing;
+
+    // Random
+    {
+        var p: Parser = .init(null);
+        const input = "133;Lol";
+        for (input) |ch| p.next(ch);
+        try testing.expect(p.end(null) == null);
+    }
+
+    // Options
+    {
+        var p: Parser = .init(null);
+        const input = "133;L;aid=foo";
+        for (input) |ch| p.next(ch);
+        try testing.expect(p.end(null) == null);
+    }
+}

src/terminal/stream.zig

@@ -2003,6 +2003,9 @@ pub fn Stream(comptime Handler: type) type {
             // ref: https://github.com/qwerasd205/asciinema-stats
 
             switch (cmd) {
+                // TODO
+                .semantic_prompt => {},
+
                 .change_window_title => |title| {
                     @branchHint(.likely);
                     if (!std.unicode.utf8ValidateSlice(title)) {