feat(tcl): add dynamic argument completion and snippets
The changes add dynamic, semantic argument completion for Tcl commands and snippet support. - Introduces DynamicCompletionKind, TclArgumentCompletion, and dynamic rules for Tcl to provide variable, procedure, namespace, and path suggestions. - Adds snippet-backed commands and arguments for Tcl blocks and paths. - Refactors tcl_argument_completion and updates the LSP to use dynamic path, variable, and namespace completions with snippet kinds.
This commit is contained in:
Christoph Brandau
@@ -31,6 +31,7 @@ COMMAND_KINDS = {
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lsp.CompletionItemKind.Method,
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lsp.CompletionItemKind.Constructor,
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lsp.CompletionItemKind.Keyword,
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lsp.CompletionItemKind.Snippet,
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}
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_VARIABLE_PREFIX_RE = re.compile(r"(?<!\\)\$(?:\{)?[A-Za-z0-9_:]*$")
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@@ -4,8 +4,44 @@ from __future__ import annotations
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from collections.abc import Sequence
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from dataclasses import dataclass
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from enum import Enum
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from pathlib import Path
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from lsprotocol.types import CompletionItem, CompletionItemKind, Position
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from lsprotocol.types import (
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CompletionItem,
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CompletionItemKind,
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InsertTextFormat,
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Position,
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Range,
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TextEdit,
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)
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class DynamicCompletionKind(Enum):
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"""Workspace- or filesystem-backed completion requested by the grammar."""
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VARIABLE = "variable"
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PROCEDURE = "procedure"
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NAMESPACE = "namespace"
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PATH = "path"
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@dataclass(frozen=True)
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class TclArgumentCompletion:
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"""Static suggestions plus an optional dynamic completion category."""
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items: tuple[CompletionItem, ...] = ()
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dynamic_kind: DynamicCompletionKind | None = None
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active_prefix: str = ""
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path_extensions: tuple[str, ...] = ()
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@dataclass(frozen=True)
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class DynamicCompletionRule:
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path: tuple[str, ...]
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argument_indices: frozenset[int]
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kind: DynamicCompletionKind
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path_extensions: tuple[str, ...] = ()
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@dataclass(frozen=True)
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@@ -343,7 +379,11 @@ OPTIONS_BY_PATH: dict[tuple[str, ...], tuple[OptionSpec, ...]] = {
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OptionSpec("--"),
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),
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("return",): (
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OptionSpec("-code", takes_value=True),
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OptionSpec(
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"-code",
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takes_value=True,
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values=("ok", "error", "return", "break", "continue"),
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),
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OptionSpec("-errorcode", takes_value=True),
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OptionSpec("-errorinfo", takes_value=True),
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OptionSpec("-errorstack", takes_value=True),
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@@ -383,23 +423,266 @@ for _string_class in STRING_CLASSES:
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VALUES_BY_POSITION: dict[tuple[tuple[str, ...], int], tuple[str, ...]] = {
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(("array", "names"), 3): ("-exact", "-glob", "-regexp"),
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(("close",), 2): ("read", "write"),
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(("open",), 2): ("r", "r+", "w", "w+", "a", "a+"),
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(("package", "prefer"), 2): ("latest", "stable"),
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(("seek",), 3): ("start", "current", "end"),
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(("string", "is"), 2): STRING_CLASSES,
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}
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_REPEATED_ARGUMENTS = frozenset(range(1, 33))
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_REPEATED_SUBCOMMAND_ARGUMENTS = frozenset(range(2, 33))
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DYNAMIC_COMPLETION_RULES = (
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# Variable-taking commands.
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DynamicCompletionRule(("append",), frozenset({1}), DynamicCompletionKind.VARIABLE),
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DynamicCompletionRule(
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("array", "exists"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("array", "get"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("array", "names"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("array", "set"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("array", "size"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("array", "statistics"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("array", "unset"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("catch",), frozenset({2, 3}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("dict", "append"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("dict", "incr"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("dict", "lappend"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("dict", "set"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("dict", "unset"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("dict", "update"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("dict", "with"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("global",), _REPEATED_ARGUMENTS, DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(("incr",), frozenset({1}), DynamicCompletionKind.VARIABLE),
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DynamicCompletionRule(
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("info", "exists"), frozenset({2}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(("lappend",), frozenset({1}), DynamicCompletionKind.VARIABLE),
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DynamicCompletionRule(("set",), frozenset({1}), DynamicCompletionKind.VARIABLE),
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DynamicCompletionRule(
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("unset",), _REPEATED_ARGUMENTS, DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(
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("variable",), frozenset({1}), DynamicCompletionKind.VARIABLE
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),
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DynamicCompletionRule(("vwait",), frozenset({1}), DynamicCompletionKind.VARIABLE),
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# Procedure-taking commands.
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DynamicCompletionRule(
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("info", "args"), frozenset({2}), DynamicCompletionKind.PROCEDURE
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),
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DynamicCompletionRule(
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("info", "body"), frozenset({2}), DynamicCompletionKind.PROCEDURE
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),
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DynamicCompletionRule(
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("info", "default"), frozenset({2}), DynamicCompletionKind.PROCEDURE
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),
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DynamicCompletionRule(
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("namespace", "origin"), frozenset({2}), DynamicCompletionKind.PROCEDURE
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),
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DynamicCompletionRule(("rename",), frozenset({1}), DynamicCompletionKind.PROCEDURE),
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# Namespace-taking commands.
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DynamicCompletionRule(
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("namespace", "children"), frozenset({2}), DynamicCompletionKind.NAMESPACE
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),
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DynamicCompletionRule(
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("namespace", "delete"),
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_REPEATED_SUBCOMMAND_ARGUMENTS,
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DynamicCompletionKind.NAMESPACE,
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),
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DynamicCompletionRule(
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("namespace", "eval"), frozenset({2}), DynamicCompletionKind.NAMESPACE
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),
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DynamicCompletionRule(
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("namespace", "exists"), frozenset({2}), DynamicCompletionKind.NAMESPACE
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),
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DynamicCompletionRule(
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("namespace", "parent"), frozenset({2}), DynamicCompletionKind.NAMESPACE
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),
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# Path-taking commands. Source files are narrowed to Tcl while directories
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# remain visible so users can continue navigating.
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DynamicCompletionRule(("cd",), frozenset({1}), DynamicCompletionKind.PATH),
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DynamicCompletionRule(
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("load",), frozenset({1}), DynamicCompletionKind.PATH, (".dll", ".so", ".dylib")
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),
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DynamicCompletionRule(("open",), frozenset({1}), DynamicCompletionKind.PATH),
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DynamicCompletionRule(
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("source",), frozenset({1, 3}), DynamicCompletionKind.PATH, (".tcl",)
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),
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*(
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DynamicCompletionRule(
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("file", subcommand),
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_REPEATED_SUBCOMMAND_ARGUMENTS,
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DynamicCompletionKind.PATH,
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)
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for subcommand in ("copy", "delete", "join", "link", "mkdir", "rename")
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),
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*(
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DynamicCompletionRule(
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("file", subcommand),
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frozenset({2}),
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DynamicCompletionKind.PATH,
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)
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for subcommand in (
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"atime",
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"attributes",
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"dirname",
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"executable",
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"exists",
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"extension",
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"isdirectory",
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"isfile",
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"lstat",
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"mtime",
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"nativename",
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"normalize",
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"owned",
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"pathtype",
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"readable",
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"readlink",
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"rootname",
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"separator",
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"size",
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"split",
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"stat",
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"system",
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"tail",
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"type",
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"writable",
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)
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),
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)
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def _snippet_item(label: str, insert_text: str, detail: str) -> CompletionItem:
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return CompletionItem(
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label=label,
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kind=CompletionItemKind.Snippet,
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detail=detail,
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insert_text=insert_text,
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insert_text_format=InsertTextFormat.Snippet,
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)
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TCL_COMMAND_SNIPPET_ITEMS = {
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"foreach": _snippet_item(
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"foreach",
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"foreach ${1:item} ${2:list} {\n\t${0}\n}",
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"Tcl foreach loop",
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),
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"if": _snippet_item(
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"if",
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"if {${1:condition}} {\n\t${0}\n}",
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"Tcl if block",
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),
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"proc": _snippet_item(
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"proc",
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"proc ${1:name} {${2:arguments}} {\n\t${0}\n}",
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"Tcl procedure",
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),
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"switch": _snippet_item(
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"switch",
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"switch -- ${1:value} {\n\t${2:pattern} {\n\t\t${0}\n\t}\n}",
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"Tcl switch block",
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),
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"try": _snippet_item(
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"try",
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"try {\n\t${1}\n} on error {${2:message} ${3:options}} {\n\t${0}\n}",
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"Tcl try/on error block",
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),
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}
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ARGUMENT_SNIPPETS_BY_PATH = {
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("dict", "for"): _snippet_item(
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"dict for loop",
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"{${1:key} ${2:value}} ${3:dictionary} {\n\t${0}\n}",
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"Arguments and body for dict for",
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),
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("foreach",): _snippet_item(
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"foreach loop",
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"${1:item} ${2:list} {\n\t${0}\n}",
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"Arguments and body for foreach",
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),
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("if",): _snippet_item(
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"if block",
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"{${1:condition}} {\n\t${0}\n}",
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"Condition and body for if",
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),
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("proc",): _snippet_item(
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"procedure",
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"${1:name} {${2:arguments}} {\n\t${0}\n}",
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"Name, arguments, and body for proc",
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),
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("switch",): _snippet_item(
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"switch block",
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"-- ${1:value} {\n\t${2:pattern} {\n\t\t${0}\n\t}\n}",
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"Value, patterns, and body for switch",
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),
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("try",): _snippet_item(
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"try/on error block",
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"{\n\t${1}\n} on error {${2:message} ${3:options}} {\n\t${0}\n}",
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"Body and error handler for try",
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),
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}
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SUBCOMMAND_SNIPPET_ITEMS = {
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("dict", "for"): _snippet_item(
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"for",
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"for {${1:key} ${2:value}} ${3:dictionary} {\n\t${0}\n}",
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"dict for loop",
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)
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}
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TCL_COMMAND_NAMES = tuple(
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sorted(
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{path[0] for path in SUBCOMMANDS_BY_PATH}
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| {path[0] for path in OPTIONS_BY_PATH}
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| set(TCL_COMMAND_SNIPPET_ITEMS)
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| {rule.path[0] for rule in DYNAMIC_COMPLETION_RULES}
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)
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)
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TCL_COMMAND_ITEMS = tuple(
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CompletionItem(
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label=command,
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kind=CompletionItemKind.Function,
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detail="Tcl command",
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insert_text=command,
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TCL_COMMAND_SNIPPET_ITEMS.get(
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command,
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CompletionItem(
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label=command,
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kind=CompletionItemKind.Function,
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detail="Tcl command",
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insert_text=command,
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),
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)
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for command in TCL_COMMAND_NAMES
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)
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@@ -420,10 +703,10 @@ def line_prefix_at_position(
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return line[:codepoint_offset]
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def tcl_argument_completions(
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def tcl_argument_completion(
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source_lines: Sequence[str], position: Position
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) -> list[CompletionItem] | None:
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"""Return subcommand, fixed-value, or option completions at ``position``.
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) -> TclArgumentCompletion | None:
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"""Describe static and dynamic argument completion at ``position``.
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``None`` means that the cursor is not at a command-specific completion
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position and the caller should fall back to normal symbol completion.
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@@ -445,43 +728,70 @@ def tcl_argument_completions(
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active_index = len(words) - 1
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active_prefix = words[active_index]
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completed_path = tuple(words[:active_index])
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dynamic_completion = _dynamic_completion(words, active_index, active_prefix)
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subcommands = SUBCOMMANDS_BY_PATH.get(completed_path)
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if subcommands is not None:
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return _completion_items(
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subcommands,
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CompletionItemKind.EnumMember,
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f"{' '.join(completed_path)} subcommand",
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items = tuple(
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SUBCOMMAND_SNIPPET_ITEMS.get(
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(*completed_path, label),
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CompletionItem(
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label=label,
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kind=CompletionItemKind.EnumMember,
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detail=f"{' '.join(completed_path)} subcommand",
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insert_text=label,
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),
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)
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for label in subcommands
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)
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return TclArgumentCompletion(items=items, active_prefix=active_prefix)
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argument_snippet = ARGUMENT_SNIPPETS_BY_PATH.get(completed_path)
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argument_items = (argument_snippet,) if argument_snippet is not None else ()
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for (path, argument_index), values in VALUES_BY_POSITION.items():
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if active_index == argument_index and tuple(words[: len(path)]) == path:
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return _completion_items(
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values,
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CompletionItemKind.Value,
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f"{' '.join(path)} value",
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return TclArgumentCompletion(
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items=_completion_items(
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values,
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CompletionItemKind.Value,
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f"{' '.join(path)} value",
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),
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active_prefix=active_prefix,
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)
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for path in sorted(OPTIONS_BY_PATH, key=len, reverse=True):
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if active_index < len(path) or tuple(words[: len(path)]) != path:
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continue
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return _option_completions(
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option_completion = _option_completion(
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path,
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OPTIONS_BY_PATH[path],
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words[len(path) : active_index],
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active_prefix,
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)
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if option_completion is not None:
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if active_prefix.startswith("-"):
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return option_completion
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return _merge_dynamic_completion(
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(*argument_items, *option_completion.items),
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dynamic_completion,
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active_prefix,
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)
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return None
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if argument_items:
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return _merge_dynamic_completion(
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argument_items, dynamic_completion, active_prefix
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)
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return dynamic_completion
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def _option_completions(
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def _option_completion(
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path: tuple[str, ...],
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options: tuple[OptionSpec, ...],
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completed_arguments: Sequence[str],
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active_prefix: str,
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) -> list[CompletionItem] | None:
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) -> TclArgumentCompletion | None:
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option_by_label = {option.label: option for option in options}
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used_options: set[str] = set()
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argument_index = 0
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@@ -503,10 +813,13 @@ def _option_completions(
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if argument_index >= len(completed_arguments):
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if option.values:
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return _completion_items(
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option.values,
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CompletionItemKind.Value,
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f"{option.label} value",
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return TclArgumentCompletion(
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items=_completion_items(
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option.values,
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CompletionItemKind.Value,
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f"{option.label} value",
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),
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active_prefix=active_prefix,
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)
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return None
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argument_index += 1
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@@ -517,17 +830,53 @@ def _option_completions(
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remaining_options = tuple(
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option.label for option in options if option.label not in used_options
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)
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return _completion_items(
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remaining_options,
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CompletionItemKind.Keyword,
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f"{' '.join(path)} option",
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return TclArgumentCompletion(
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items=_completion_items(
|
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remaining_options,
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CompletionItemKind.Keyword,
|
||||
f"{' '.join(path)} option",
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),
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active_prefix=active_prefix,
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)
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def _dynamic_completion(
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words: Sequence[str], active_index: int, active_prefix: str
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) -> TclArgumentCompletion | None:
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for rule in sorted(
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DYNAMIC_COMPLETION_RULES, key=lambda item: len(item.path), reverse=True
|
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):
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if (
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active_index in rule.argument_indices
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and tuple(words[: len(rule.path)]) == rule.path
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):
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return TclArgumentCompletion(
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||||
dynamic_kind=rule.kind,
|
||||
active_prefix=active_prefix,
|
||||
path_extensions=rule.path_extensions,
|
||||
)
|
||||
return None
|
||||
|
||||
|
||||
def _merge_dynamic_completion(
|
||||
items: Sequence[CompletionItem],
|
||||
dynamic_completion: TclArgumentCompletion | None,
|
||||
active_prefix: str,
|
||||
) -> TclArgumentCompletion:
|
||||
if dynamic_completion is None:
|
||||
return TclArgumentCompletion(items=tuple(items), active_prefix=active_prefix)
|
||||
return TclArgumentCompletion(
|
||||
items=tuple(items),
|
||||
dynamic_kind=dynamic_completion.dynamic_kind,
|
||||
active_prefix=active_prefix,
|
||||
path_extensions=dynamic_completion.path_extensions,
|
||||
)
|
||||
|
||||
|
||||
def _completion_items(
|
||||
labels: Sequence[str], kind: CompletionItemKind, detail: str
|
||||
) -> list[CompletionItem]:
|
||||
return [
|
||||
) -> tuple[CompletionItem, ...]:
|
||||
return tuple(
|
||||
CompletionItem(
|
||||
label=label,
|
||||
kind=kind,
|
||||
@@ -535,7 +884,85 @@ def _completion_items(
|
||||
insert_text=label,
|
||||
)
|
||||
for label in labels
|
||||
]
|
||||
)
|
||||
|
||||
|
||||
def path_completion_items(
|
||||
base_directory: Path,
|
||||
completion: TclArgumentCompletion,
|
||||
position: Position,
|
||||
*,
|
||||
limit: int = 200,
|
||||
) -> tuple[CompletionItem, ...]:
|
||||
"""Complete one filesystem path relative to the current Tcl document."""
|
||||
|
||||
raw_prefix = completion.active_prefix
|
||||
separator_index = max(raw_prefix.rfind("/"), raw_prefix.rfind("\\"))
|
||||
typed_directory = raw_prefix[: separator_index + 1]
|
||||
name_prefix = raw_prefix[separator_index + 1 :]
|
||||
normalized_directory = typed_directory.replace("\\", "/")
|
||||
filesystem_directory = Path(normalized_directory)
|
||||
if not filesystem_directory.is_absolute():
|
||||
filesystem_directory = base_directory / filesystem_directory
|
||||
|
||||
try:
|
||||
entries = sorted(
|
||||
filesystem_directory.iterdir(),
|
||||
key=lambda entry: (not entry.is_dir(), entry.name.casefold()),
|
||||
)
|
||||
except (OSError, ValueError):
|
||||
return ()
|
||||
|
||||
allowed_extensions = {
|
||||
extension.casefold() for extension in completion.path_extensions
|
||||
}
|
||||
replace_start = max(
|
||||
0,
|
||||
position.character - len(raw_prefix.encode("utf-16-le")) // 2,
|
||||
)
|
||||
replace_range = Range(
|
||||
start=Position(line=position.line, character=replace_start),
|
||||
end=position,
|
||||
)
|
||||
items: list[CompletionItem] = []
|
||||
|
||||
for entry in entries:
|
||||
if not entry.name.casefold().startswith(name_prefix.casefold()):
|
||||
continue
|
||||
try:
|
||||
is_directory = entry.is_dir()
|
||||
except OSError:
|
||||
continue
|
||||
if (
|
||||
not is_directory
|
||||
and allowed_extensions
|
||||
and entry.suffix.casefold() not in allowed_extensions
|
||||
):
|
||||
continue
|
||||
|
||||
escaped_name = "".join(
|
||||
f"\\{character}" if character.isspace() else character
|
||||
for character in entry.name
|
||||
)
|
||||
new_text = f"{normalized_directory}{escaped_name}"
|
||||
if is_directory:
|
||||
new_text += "/"
|
||||
items.append(
|
||||
CompletionItem(
|
||||
label=new_text,
|
||||
kind=(
|
||||
CompletionItemKind.Folder
|
||||
if is_directory
|
||||
else CompletionItemKind.File
|
||||
),
|
||||
detail="Directory" if is_directory else "File",
|
||||
text_edit=TextEdit(range=replace_range, new_text=new_text),
|
||||
)
|
||||
)
|
||||
if len(items) >= limit:
|
||||
break
|
||||
|
||||
return tuple(items)
|
||||
|
||||
|
||||
def _current_command_segment(line_prefix: str) -> str:
|
||||
@@ -592,41 +1019,48 @@ def _tokenize_command_segment(segment: str) -> list[str]:
|
||||
in_quote = False
|
||||
escaped = False
|
||||
ended_with_separator = False
|
||||
word_started = False
|
||||
|
||||
for char in segment:
|
||||
if escaped:
|
||||
current.append(char)
|
||||
escaped = False
|
||||
ended_with_separator = False
|
||||
word_started = True
|
||||
continue
|
||||
if char == "\\":
|
||||
current.append(char)
|
||||
escaped = True
|
||||
ended_with_separator = False
|
||||
word_started = True
|
||||
continue
|
||||
if char == '"' and brace_depth == 0:
|
||||
in_quote = not in_quote
|
||||
ended_with_separator = False
|
||||
word_started = True
|
||||
continue
|
||||
if not in_quote and char == "{":
|
||||
brace_depth += 1
|
||||
ended_with_separator = False
|
||||
word_started = True
|
||||
continue
|
||||
if not in_quote and char == "}" and brace_depth:
|
||||
brace_depth -= 1
|
||||
ended_with_separator = False
|
||||
continue
|
||||
if char.isspace() and not in_quote and brace_depth == 0:
|
||||
if current:
|
||||
if current or word_started:
|
||||
words.append("".join(current))
|
||||
current = []
|
||||
word_started = False
|
||||
ended_with_separator = bool(words)
|
||||
continue
|
||||
|
||||
current.append(char)
|
||||
ended_with_separator = False
|
||||
word_started = True
|
||||
|
||||
if current:
|
||||
if current or word_started:
|
||||
words.append("".join(current))
|
||||
elif ended_with_separator:
|
||||
words.append("")
|
||||
|
||||
@@ -1,9 +1,9 @@
|
||||
from __future__ import annotations
|
||||
|
||||
from dataclasses import dataclass
|
||||
from typing import Dict, List, Set
|
||||
|
||||
from tclint.syntax_tree import Command, Node, Script
|
||||
from tclint.syntax_tree import List as TclList
|
||||
|
||||
|
||||
@dataclass
|
||||
@@ -18,13 +18,14 @@ def _normalize_var_name(raw_name: str | None) -> str | None:
|
||||
return None
|
||||
|
||||
base = raw_name.split("(", 1)[0]
|
||||
if base.startswith("::"):
|
||||
base = base[2:]
|
||||
base = base.removeprefix("::")
|
||||
|
||||
return base or None
|
||||
|
||||
|
||||
def build_variable_index(source: str, tree: Node | None = None) -> tuple[Set[str], Dict[str, Set[str]], List[ProcRange]]:
|
||||
def build_variable_index(
|
||||
source: str, tree: Node | None = None
|
||||
) -> tuple[set[str], dict[str, set[str]], list[ProcRange]]:
|
||||
"""
|
||||
Parse Tcl source text and build:
|
||||
- globals: set of variable names considered global suggestions
|
||||
@@ -40,9 +41,9 @@ def build_variable_index(source: str, tree: Node | None = None) -> tuple[Set[str
|
||||
"""
|
||||
_ = source # Kept for signature compatibility with callers.
|
||||
|
||||
globals_set: Set[str] = set()
|
||||
procs: Dict[str, Set[str]] = {}
|
||||
proc_ranges: List[ProcRange] = []
|
||||
globals_set: set[str] = set()
|
||||
procs: dict[str, set[str]] = {}
|
||||
proc_ranges: list[ProcRange] = []
|
||||
|
||||
if tree is None:
|
||||
return globals_set, procs, proc_ranges
|
||||
@@ -54,7 +55,16 @@ def build_variable_index(source: str, tree: Node | None = None) -> tuple[Set[str
|
||||
if routine == "proc" and len(node.args) >= 3 and isinstance(node.args[2], Script):
|
||||
proc_name = _normalize_var_name(getattr(node.args[0], "contents", None))
|
||||
if proc_name is not None:
|
||||
procs.setdefault(proc_name, set())
|
||||
local_variables = procs.setdefault(proc_name, set())
|
||||
for parameter in getattr(node.args[1], "children", []):
|
||||
parameter_node = parameter
|
||||
if isinstance(parameter, TclList) and parameter.children:
|
||||
parameter_node = parameter.children[0]
|
||||
parameter_name = _normalize_var_name(
|
||||
getattr(parameter_node, "contents", None)
|
||||
)
|
||||
if parameter_name is not None:
|
||||
local_variables.add(parameter_name)
|
||||
proc_ranges.append(
|
||||
ProcRange(
|
||||
name=proc_name,
|
||||
|
||||
Reference in New Issue
Block a user