this repo has no description
feat: support legacy xterm-style mouse events
authored by
FalsePattern
and committed by
Tim Culverhouse
c49abb48
1f41c121
+47
-11
+47
-11
src/Parser.zig
+47
-11
src/Parser.zig
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'I' => return .{ .event = .focus_in, .n = sequence.len },
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'O' => return .{ .event = .focus_out, .n = sequence.len },
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'M', 'm' => return parseMouse(sequence),
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'M', 'm' => return parseMouse(sequence, input),
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'c' => {
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// Primary DA (CSI ? Pm c)
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std.debug.assert(sequence.len >= 4); // ESC [ ? c == 4 bytes
···
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}
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/// Parse a mouse event
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inline fn parseMouse(input: []const u8) Result {
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std.debug.assert(input.len >= 4); // ESC [ < [Mm]
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inline fn parseMouse(input: []const u8, full_input: []const u8) Result {
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const null_event: Result = .{ .event = null, .n = input.len };
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if (input[2] != '<') return null_event;
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const delim1 = std.mem.indexOfScalarPos(u8, input, 3, ';') orelse return null_event;
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const button_mask = parseParam(u16, input[3..delim1], null) orelse return null_event;
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const delim2 = std.mem.indexOfScalarPos(u8, input, delim1 + 1, ';') orelse return null_event;
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const px = parseParam(u16, input[delim1 + 1 .. delim2], 1) orelse return null_event;
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const py = parseParam(u16, input[delim2 + 1 .. input.len - 1], 1) orelse return null_event;
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var button_mask: u16 = undefined;
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var px: u16 = undefined;
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var py: u16 = undefined;
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var xterm: bool = undefined;
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if (input.len == 3 and (input[2] == 'M') and full_input.len >= 6) {
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xterm = true;
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button_mask = full_input[3] - 32;
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px = full_input[4] - 32;
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py = full_input[5] - 32;
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} else if (input.len >= 4 and input[2] == '<') {
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xterm = false;
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const delim1 = std.mem.indexOfScalarPos(u8, input, 3, ';') orelse return null_event;
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button_mask = parseParam(u16, input[3..delim1], null) orelse return null_event;
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const delim2 = std.mem.indexOfScalarPos(u8, input, delim1 + 1, ';') orelse return null_event;
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px = parseParam(u16, input[delim1 + 1 .. delim2], 1) orelse return null_event;
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py = parseParam(u16, input[delim2 + 1 .. input.len - 1], 1) orelse return null_event;
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} else {
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return null_event;
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}
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const button: Mouse.Button = @enumFromInt(button_mask & mouse_bits.buttons);
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const motion = button_mask & mouse_bits.motion > 0;
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if (motion and button == Mouse.Button.none) {
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break :blk .motion;
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}
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if (xterm) {
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if (button == Mouse.Button.none) {
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break :blk .release;
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}
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break :blk .press;
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}
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if (input[input.len - 1] == 'm') break :blk .release;
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break :blk .press;
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},
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};
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return .{ .event = .{ .mouse = mouse }, .n = input.len };
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return .{ .event = .{ .mouse = mouse }, .n = if (xterm) 6 else input.len };
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}
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test "parse: single xterm keypress" {
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.row = 0,
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.button = .none,
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.type = .motion,
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.mods = .{},
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} },
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.n = input.len,
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};
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try testing.expectEqual(expected.n, result.n);
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try testing.expectEqual(expected.event, result.event);
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}
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test "parse(csi): xterm mouse" {
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var buf: [1]u8 = undefined;
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const input = "\x1b[M\x20\x21\x21";
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const result = parseCsi(input, &buf);
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const expected: Result = .{
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.event = .{ .mouse = .{
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.col = 0,
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.row = 0,
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.button = .left,
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.type = .press,
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.mods = .{},
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} },
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.n = input.len,