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lsp: Support completions

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James Westman 2021-10-30 17:47:31 -05:00
parent afecd744ca
commit 408f3ebce5
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8 changed files with 460 additions and 106 deletions
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62
gtkblueprinttool/parser.py
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@ -24,28 +24,26 @@ from .parse_tree import *
from .tokenizer import TokenType
def parse(tokens) -> ast.UI:
def parse(tokens) -> T.Tuple[ast.UI, T.Optional[MultipleErrors]]:
""" Parses a list of tokens into an abstract syntax tree. """
gtk_directive = Group(
ast.GtkDirective,
Sequence(
Keyword("using"),
Keyword("Gtk"),
Statement(
Keyword("using").err("File must start with a \"using gtk\" directive (e.g. `using Gtk 4.0;`)"),
Keyword("Gtk").err("File must start with a \"using gtk\" directive (e.g. `using Gtk 4.0;`)"),
UseNumberText("version").expected("a version number for GTK"),
StmtEnd().expected("`;`"),
)
)
import_statement = Group(
ast.Import,
Sequence(
Statement(
Keyword("using"),
UseIdent("namespace").expected("a GIR namespace"),
UseNumberText("version").expected("a version number"),
StmtEnd().expected("`;`"),
)
).recover()
)
class_name = AnyOf(
Sequence(
@ -89,20 +87,19 @@ def parse(tokens) -> ast.UI:
property = Group(
ast.Property,
Sequence(
Statement(
UseIdent("name"),
Op(":"),
AnyOf(
object,
value,
).expected("a value"),
StmtEnd().expected("`;`"),
)
).recover()
)
binding = Group(
ast.Property,
Sequence(
Statement(
UseIdent("name"),
Op(":"),
Keyword("bind"),
@ -113,13 +110,12 @@ def parse(tokens) -> ast.UI:
Sequence(Keyword("sync-create"), UseLiteral("sync_create", True)),
Sequence(Keyword("after"), UseLiteral("after", True)),
),
StmtEnd().expected("`;`"),
)
).recover()
)
signal = Group(
ast.Signal,
Sequence(
Statement(
UseIdent("name"),
Optional(Sequence(
Op("::"),
@ -134,9 +130,8 @@ def parse(tokens) -> ast.UI:
Sequence(Keyword("after"), UseLiteral("after", True)),
Sequence(Keyword("object"), UseLiteral("object", True)),
)),
StmtEnd().expected("`;`"),
)
).recover()
)
child = Group(
ast.Child,
@ -152,7 +147,7 @@ def parse(tokens) -> ast.UI:
style = Group(
ast.Style,
Sequence(
Statement(
Keyword("style"),
Delimited(
Group(
@ -161,7 +156,6 @@ def parse(tokens) -> ast.UI:
),
Comma(),
),
StmtEnd(),
)
)
@ -204,8 +198,7 @@ def parse(tokens) -> ast.UI:
UseLiteral("tag", "item"),
Optional(UseIdent("id")),
OpenBlock().expected("`{`"),
ZeroOrMore(menu_attribute),
CloseBlock().err("Could not understand statement"),
Until(menu_attribute, CloseBlock()),
)
)
@ -232,14 +225,13 @@ def parse(tokens) -> ast.UI:
menu_contents.children = [
OpenBlock().expected("`{`"),
ZeroOrMore(AnyOf(
Until(AnyOf(
menu_section,
menu_submenu,
menu_item_shorthand,
menu_item,
menu_attribute,
)),
CloseBlock().err("Could not understand statement"),
), CloseBlock()),
]
menu = Group(
@ -256,14 +248,13 @@ def parse(tokens) -> ast.UI:
ast.ObjectContent,
Sequence(
OpenBlock(),
ZeroOrMore(AnyOf(
Until(AnyOf(
style,
binding,
property,
signal,
child,
)),
CloseBlock().err("Could not understand statement"),
), CloseBlock()),
)
)
@ -288,19 +279,20 @@ def parse(tokens) -> ast.UI:
ui = Group(
ast.UI,
Sequence(
gtk_directive.err("File must start with a \"using gtk\" directive (e.g. `using Gtk 4.0;`)"),
gtk_directive.err("File must start with a \"using Gtk\" directive (e.g. `using Gtk 4.0;`)"),
ZeroOrMore(import_statement),
ZeroOrMore(AnyOf(
Until(AnyOf(
template,
menu,
object,
)),
Eof().err("Failed to parse the rest of the file"),
), Eof()),
)
).recover()
)
ctx = ParseContext(tokens)
ui.parse(ctx)
if len(ctx.errors):
raise MultipleErrors(ctx.errors)
return ctx.last_group.to_ast()
ast_node = ctx.last_group.to_ast() if ctx.last_group else None
errors = MultipleErrors(ctx.errors) if len(ctx.errors) else None
return (ast_node, errors)