Merge branch blueprint-compiler:main into main

MAINTENANCE.md

@@ -8,7 +8,7 @@ in the NEWS file.
 3. Make a new commit with just these two changes. Use `Release v{version}` as the commit message. Tag the commit as `v{version}` and push the tag.
 4. Create a "Post-release version bump" commit.
 5. Go to the Releases page in GitLab and create a new release from the tag.
-6. Announce the release through relevant channels (Twitter, TWIG, etc.)
+6. Announce the release through relevant channels (Mastodon, TWIG, etc.)
 
 ## Related projects
 

NEWS.md

@@ -1,3 +1,35 @@
+# v0.16.0
+
+## Added
+- Added more "go to reference" implementations in the language server
+- Added semantic token support for flag members in the language server
+- Added property documentation to the hover tooltip for notify signals
+- The language server now shows relevant sections of the reference documentation when hovering over keywords and symbols
+- Added `not-swapped` flag to signal handlers, which may be needed for signal handlers that specify an object
+- Added expression literals, which allow you to specify a Gtk.Expression property (as opposed to the existing expression support, which is for property bindings)
+
+## Changed
+- The formatter adds trailing commas to lists (Alexey Yerin)
+- The formatter removes trailing whitespace from comments (Alexey Yerin)
+- Autocompleting a commonly translated property automatically adds the `_("")` syntax
+- Marking a single-quoted string as translatable now generates a warning, since gettext does not recognize it when using the configuration recommended in the blueprint documentation
+
+## Fixed
+- Added support for libgirepository-2.0 so that blueprint doesn't crash due to import conflicts on newer versions of PyGObject (Jordan Petridis)
+- Fixed a bug when decompiling/porting files with enum values
+- Fixed several issues where tests would fail with versions of GTK that added new deprecations
+- Addressed a problem with the language server protocol in some editors (Luoyayu)
+- Fixed an issue where the compiler would crash instead of reporting compiler errors
+- Fixed a crash in the language server that occurred when a detailed signal (e.g. `notify::*`) was not complete
+- The language server now properly implements the shutdown command, fixing support for some editors and improving robustness when restarting (Alexey Yerin)
+- Marking a string in an array as translatable now generates an error, since it doesn't work
+-
+
+## Documentation
+- Added mention of `null` in the Literal Values section
+- Add apps to Built with Blueprint section (Benedek Dévényi, Vladimir Vaskov)
+- Corrected and updated many parts of the documentation
+
 # v0.14.0
 
 ## Added

blueprintcompiler/annotations.py

@@ -0,0 +1,191 @@
+# annotations.py
+#
+# Copyright 2024 James Westman <james@jwestman.net>
+#
+# This file is free software; you can redistribute it and/or modify it
+# under the terms of the GNU Lesser General Public License as
+# published by the Free Software Foundation; either version 3 of the
+# License, or (at your option) any later version.
+#
+# This file is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this program.  If not, see <http://www.gnu.org/licenses/>.
+#
+# SPDX-License-Identifier: LGPL-3.0-or-later
+
+# Extra information about types in common libraries that's used for things like completions.
+
+import typing as T
+from dataclasses import dataclass
+
+from . import gir
+
+
+@dataclass
+class Annotation:
+    translatable_properties: T.List[str]
+
+
+def is_property_translated(property: gir.Property):
+    ns = property.get_containing(gir.Namespace)
+    ns_name = ns.name + "-" + ns.version
+    if annotation := _ANNOTATIONS.get(ns_name):
+        assert property.container is not None
+        return (
+            property.container.name + ":" + property.name
+            in annotation.translatable_properties
+        )
+    else:
+        return False
+
+
+_ANNOTATIONS = {
+    "Gtk-4.0": Annotation(
+        translatable_properties=[
+            "AboutDialog:comments",
+            "AboutDialog:translator-credits",
+            "AboutDialog:website-label",
+            "AlertDialog:detail",
+            "AlertDialog:message",
+            "AppChooserButton:heading",
+            "AppChooserDialog:heading",
+            "AppChooserWidget:default-text",
+            "AssistantPage:title",
+            "Button:label",
+            "CellRendererText:markup",
+            "CellRendererText:placeholder-text",
+            "CellRendererText:text",
+            "CheckButton:label",
+            "ColorButton:title",
+            "ColorDialog:title",
+            "ColumnViewColumn:title",
+            "ColumnViewRow:accessible-description",
+            "ColumnViewRow:accessible-label",
+            "Entry:placeholder-text",
+            "Entry:primary-icon-tooltip-markup",
+            "Entry:primary-icon-tooltip-text",
+            "Entry:secondary-icon-tooltip-markup",
+            "Entry:secondary-icon-tooltip-text",
+            "EntryBuffer:text",
+            "Expander:label",
+            "FileChooserNative:accept-label",
+            "FileChooserNative:cancel-label",
+            "FileChooserWidget:subtitle",
+            "FileDialog:accept-label",
+            "FileDialog:title",
+            "FileDialog:initial-name",
+            "FileFilter:name",
+            "FontButton:title",
+            "FontDialog:title",
+            "Frame:label",
+            "Inscription:markup",
+            "Inscription:text",
+            "Label:label",
+            "ListItem:accessible-description",
+            "ListItem:accessible-label",
+            "LockButton:text-lock",
+            "LockButton:text-unlock",
+            "LockButton:tooltip-lock",
+            "LockButton:tooltip-not-authorized",
+            "LockButton:tooltip-unlock",
+            "MenuButton:label",
+            "MessageDialog:secondary-text",
+            "MessageDialog:text",
+            "NativeDialog:title",
+            "NotebookPage:menu-label",
+            "NotebookPage:tab-label",
+            "PasswordEntry:placeholder-text",
+            "Picture:alternative-text",
+            "PrintDialog:accept-label",
+            "PrintDialog:title",
+            "Printer:name",
+            "PrintJob:title",
+            "PrintOperation:custom-tab-label",
+            "PrintOperation:export-filename",
+            "PrintOperation:job-name",
+            "ProgressBar:text",
+            "SearchEntry:placeholder-text",
+            "ShortcutLabel:disabled-text",
+            "ShortcutsGroup:title",
+            "ShortcutsSection:title",
+            "ShortcutsShortcut:title",
+            "ShortcutsShortcut:subtitle",
+            "StackPage:title",
+            "Text:placeholder-text",
+            "TextBuffer:text",
+            "TreeViewColumn:title",
+            "Widget:tooltip-markup",
+            "Widget:tooltip-text",
+            "Window:title",
+            "Editable:text",
+            "FontChooser:preview-text",
+        ]
+    ),
+    "Adw-1": Annotation(
+        translatable_properties=[
+            "AboutDialog:comments",
+            "AboutDialog:translator-credits",
+            "AboutWindow:comments",
+            "AboutWindow:translator-credits",
+            "ActionRow:subtitle",
+            "ActionRow:title",
+            "AlertDialog:body",
+            "AlertDialog:heading",
+            "Avatar:text",
+            "Banner:button-label",
+            "Banner:title",
+            "ButtonContent:label",
+            "Dialog:title",
+            "ExpanderRow:subtitle",
+            "MessageDialog:body",
+            "MessageDialog:heading",
+            "NavigationPage:title",
+            "PreferencesGroup:description",
+            "PreferencesGroup:title",
+            "PreferencesPage:description",
+            "PreferencesPage:title",
+            "PreferencesRow:title",
+            "SplitButton:dropdown-tooltip",
+            "SplitButton:label",
+            "StatusPage:description",
+            "StatusPage:title",
+            "TabPage:indicator-tooltip",
+            "TabPage:keyword",
+            "TabPage:title",
+            "Toast:button-label",
+            "Toast:title",
+            "ViewStackPage:title",
+            "ViewSwitcherTitle:subtitle",
+            "ViewSwitcherTitle:title",
+            "WindowTitle:subtitle",
+            "WindowTitle:title",
+        ]
+    ),
+    "Shumate-1.0": Annotation(
+        translatable_properties=[
+            "License:extra-text",
+            "MapSource:license",
+            "MapSource:name",
+        ]
+    ),
+    "GtkSource-5": Annotation(
+        translatable_properties=[
+            "CompletionCell:markup",
+            "CompletionCell:text",
+            "CompletionSnippets:title",
+            "CompletionWords:title",
+            "GutterRendererText:markup",
+            "GutterRendererText:text",
+            "SearchSettings:search-text",
+            "Snippet:description",
+            "Snippet:name",
+            "SnippetChunk:tooltip-text",
+            "StyleScheme:description",
+            "StyleScheme:name",
+        ]
+    ),
+}

blueprintcompiler/ast_utils.py

@@ -160,6 +160,11 @@ class AstNode:
                 yield e
                 if e.fatal:
                     return
+            except MultipleErrors as e:
+                for error in e.errors:
+                    yield error
+                    if error.fatal:
+                        return
 
         for child in self.children:
             yield from child._get_errors()
@@ -249,14 +254,7 @@ def validate(
             if skip_incomplete and self.incomplete:
                 return
 
-            try:
-                func(self)
-            except CompileError as e:
-                # If the node is only partially complete, then an error must
-                # have already been reported at the parsing stage
-                if self.incomplete:
-                    return
-
+            def fill_error(e: CompileError):
                 if e.range is None:
                     e.range = (
                         Range.join(
@@ -266,8 +264,26 @@ def validate(
                         or self.range
                     )
 
+            try:
+                func(self)
+            except CompileError as e:
+                # If the node is only partially complete, then an error must
+                # have already been reported at the parsing stage
+                if self.incomplete:
+                    return
+
+                fill_error(e)
+
                 # Re-raise the exception
                 raise e
+            except MultipleErrors as e:
+                if self.incomplete:
+                    return
+
+                for error in e.errors:
+                    fill_error(error)
+
+                raise e
 
         inner._validator = True
         return inner

blueprintcompiler/completions.py

@@ -17,10 +17,9 @@
 #
 # SPDX-License-Identifier: LGPL-3.0-or-later
 
-import sys
 import typing as T
 
-from . import gir, language
+from . import annotations, gir, language
 from .ast_utils import AstNode
 from .completions_utils import *
 from .language.types import ClassName
@@ -31,10 +30,6 @@ from .tokenizer import Token, TokenType
 Pattern = T.List[T.Tuple[TokenType, T.Optional[str]]]
 
 
-def debug(*args, **kwargs):
-    print(*args, file=sys.stderr, **kwargs)
-
-
 def _complete(
     lsp, ast_node: AstNode, tokens: T.List[Token], idx: int, token_idx: int
 ) -> T.Iterator[Completion]:
@@ -139,7 +134,7 @@ def gtk_object_completer(lsp, ast_node, match_variables):
     matches=new_statement_patterns,
 )
 def property_completer(lsp, ast_node, match_variables):
-    if ast_node.gir_class and not isinstance(ast_node.gir_class, gir.ExternType):
+    if ast_node.gir_class and hasattr(ast_node.gir_class, "properties"):
         for prop_name, prop in ast_node.gir_class.properties.items():
             if (
                 isinstance(prop.type, gir.BoolType)
@@ -154,11 +149,17 @@ def property_completer(lsp, ast_node, match_variables):
                     detail=prop.detail,
                 )
             elif isinstance(prop.type, gir.StringType):
+                snippet = (
+                    f'{prop_name}: _("$0");'
+                    if annotations.is_property_translated(prop)
+                    else f'{prop_name}: "$0";'
+                )
+
                 yield Completion(
                     prop_name,
                     CompletionItemKind.Property,
                     sort_text=f"0 {prop_name}",
-                    snippet=f'{prop_name}: "$0";',
+                    snippet=snippet,
                     docs=prop.doc,
                     detail=prop.detail,
                 )
@@ -176,6 +177,15 @@ def property_completer(lsp, ast_node, match_variables):
                     docs=prop.doc,
                     detail=prop.detail,
                 )
+            elif prop.type.full_name == "Gtk.Expression":
+                yield Completion(
+                    prop_name,
+                    CompletionItemKind.Property,
+                    sort_text=f"0 {prop_name}",
+                    snippet=f"{prop_name}: expr $0;",
+                    docs=prop.doc,
+                    detail=prop.detail,
+                )
             else:
                 yield Completion(
                     prop_name,
@@ -188,7 +198,7 @@ def property_completer(lsp, ast_node, match_variables):
 
 
 @completer(
-    applies_in=[language.Property, language.BaseAttribute],
+    applies_in=[language.Property, language.A11yProperty],
     matches=[[(TokenType.IDENT, None), (TokenType.OP, ":")]],
 )
 def prop_value_completer(lsp, ast_node, match_variables):
@@ -212,7 +222,7 @@ def prop_value_completer(lsp, ast_node, match_variables):
     matches=new_statement_patterns,
 )
 def signal_completer(lsp, ast_node, match_variables):
-    if ast_node.gir_class and not isinstance(ast_node.gir_class, gir.ExternType):
+    if ast_node.gir_class and hasattr(ast_node.gir_class, "signals"):
         for signal_name, signal in ast_node.gir_class.signals.items():
             if not isinstance(ast_node.parent, language.Object):
                 name = "on"

blueprintcompiler/completions_utils.py

@@ -31,17 +31,6 @@ new_statement_patterns = [
 ]
 
 
-def applies_to(*ast_types):
-    """Decorator describing which AST nodes the completer should apply in."""
-
-    def decorator(func):
-        for c in ast_types:
-            c.completers.append(func)
-        return func
-
-    return decorator
-
-
 def completer(applies_in: T.List, matches: T.List = [], applies_in_subclass=None):
     def decorator(func):
         def inner(prev_tokens: T.List[Token], ast_node, lsp):

blueprintcompiler/formatter.py

@@ -20,7 +20,8 @@
 import re
 from enum import Enum
 
-from . import tokenizer, utils
+from . import tokenizer
+from .errors import CompilerBugError
 from .tokenizer import TokenType
 
 OPENING_TOKENS = ("{", "[")
@@ -145,8 +146,10 @@ def format(data, tab_size=2, insert_space=True):
                 is_child_type = False
 
             elif str_item in CLOSING_TOKENS:
-                if str_item == "]" and last_not_whitespace != ",":
+                if str_item == "]" and str(last_not_whitespace) != "[":
                     current_line = current_line[:-1]
+                    if str(last_not_whitespace) != ",":
+                        current_line += ","
                     commit_current_line()
                     current_line = "]"
                 elif str(last_not_whitespace) in OPENING_TOKENS:
@@ -190,10 +193,13 @@ def format(data, tab_size=2, insert_space=True):
                 elif prev_line_type in require_extra_newline:
                     newlines = 2
 
+                current_line = "\n".join(
+                    [line.rstrip() for line in current_line.split("\n")]
+                )
                 commit_current_line(LineType.COMMENT, newlines_before=newlines)
 
-            else:
-                commit_current_line()
+            else:  # pragma: no cover
+                raise CompilerBugError()
 
         elif str_item == "(" and (
             re.match(r"^([A-Za-z_\-])+\s*\(", current_line) or watch_parentheses

blueprintcompiler/gir.py

@@ -24,8 +24,20 @@ from functools import cached_property
 
 import gi  # type: ignore
 
-gi.require_version("GIRepository", "2.0")
-from gi.repository import GIRepository  # type: ignore
+try:
+    gi.require_version("GIRepository", "3.0")
+    from gi.repository import GIRepository  # type: ignore
+
+    _repo = GIRepository.Repository()
+except ValueError:
+    # We can remove this once we can bump the minimum dependencies
+    # to glib 2.80 and pygobject 3.52
+    # dependency('glib-2.0', version: '>= 2.80.0')
+    # dependency('girepository-2.0', version: '>= 2.80.0')
+    gi.require_version("GIRepository", "2.0")
+    from gi.repository import GIRepository  # type: ignore
+
+    _repo = GIRepository.Repository
 
 from . import typelib, xml_reader
 from .errors import CompileError, CompilerBugError
@@ -42,7 +54,7 @@ def add_typelib_search_path(path: str):
 
 
 def get_namespace(namespace: str, version: str) -> "Namespace":
-    search_paths = [*GIRepository.Repository.get_search_path(), *_user_search_paths]
+    search_paths = [*_repo.get_search_path(), *_user_search_paths]
 
     filename = f"{namespace}-{version}.typelib"
 
@@ -74,7 +86,7 @@ def get_available_namespaces() -> T.List[T.Tuple[str, str]]:
         return _available_namespaces
 
     search_paths: list[str] = [
-        *GIRepository.Repository.get_search_path(),
+        *_repo.get_search_path(),
         *_user_search_paths,
     ]
 
@@ -455,10 +467,13 @@ class Signature(GirNode):
         return result
 
     @cached_property
-    def return_type(self) -> GirType:
-        return self.get_containing(Repository)._resolve_type_id(
-            self.tl.SIGNATURE_RETURN_TYPE
-        )
+    def return_type(self) -> T.Optional[GirType]:
+        if self.tl.SIGNATURE_RETURN_TYPE == 0:
+            return None
+        else:
+            return self.get_containing(Repository)._resolve_type_id(
+                self.tl.SIGNATURE_RETURN_TYPE
+            )
 
 
 class Signal(GirNode):
@@ -478,7 +493,10 @@ class Signal(GirNode):
         args = ", ".join(
             [f"{a.type.full_name} {a.name}" for a in self.gir_signature.args]
         )
-        return f"signal {self.container.full_name}::{self.name} ({args})"
+        result = f"signal {self.container.full_name}::{self.name} ({args})"
+        if self.gir_signature.return_type is not None:
+            result += f" -> {self.gir_signature.return_type.full_name}"
+        return result
 
     @property
     def online_docs(self) -> T.Optional[str]:
@@ -890,14 +908,6 @@ class Namespace(GirNode):
             if isinstance(entry, Class)
         }
 
-    @cached_property
-    def interfaces(self) -> T.Mapping[str, Interface]:
-        return {
-            name: entry
-            for name, entry in self.entries.items()
-            if isinstance(entry, Interface)
-        }
-
     def get_type(self, name) -> T.Optional[GirType]:
         """Gets a type (class, interface, enum, etc.) from this namespace."""
         return self.entries.get(name)
@@ -921,13 +931,8 @@ class Namespace(GirNode):
         """Looks up a type in the scope of this namespace (including in the
         namespace's dependencies)."""
 
-        if type_name in _BASIC_TYPES:
-            return _BASIC_TYPES[type_name]()
-        elif "." in type_name:
-            ns, name = type_name.split(".", 1)
-            return self.get_containing(Repository).get_type(name, ns)
-        else:
-            return self.get_type(type_name)
+        ns, name = type_name.split(".", 1)
+        return self.get_containing(Repository).get_type(name, ns)
 
     @property
     def online_docs(self) -> T.Optional[str]:
@@ -946,7 +951,7 @@ class Repository(GirNode):
                 self.includes = {
                     name: get_namespace(name, version) for name, version in deps
                 }
-            except:
+            except:  # pragma: no cover
                 raise CompilerBugError(f"Failed to load dependencies.")
         else:
             self.includes = {}
@@ -954,12 +959,6 @@ class Repository(GirNode):
     def get_type(self, name: str, ns: str) -> T.Optional[GirType]:
         return self.lookup_namespace(ns).get_type(name)
 
-    def get_type_by_cname(self, name: str) -> T.Optional[GirType]:
-        for ns in [self.namespace, *self.includes.values()]:
-            if type := ns.get_type_by_cname(name):
-                return type
-        return None
-
     def lookup_namespace(self, ns: str):
         """Finds a namespace among this namespace's dependencies."""
         if ns == self.namespace.name:

blueprintcompiler/language/__init__.py

@@ -4,7 +4,6 @@ from .adw_breakpoint import (
     AdwBreakpointSetters,
 )
 from .adw_response_dialog import ExtAdwResponseDialog
-from .attributes import BaseAttribute
 from .binding import Binding
 from .common import *
 from .contexts import ScopeCtx, ValueTypeCtx
@@ -20,7 +19,7 @@ from .expression import (
 from .gobject_object import Object, ObjectContent
 from .gobject_property import Property
 from .gobject_signal import Signal
-from .gtk_a11y import ExtAccessibility
+from .gtk_a11y import A11yProperty, ExtAccessibility
 from .gtk_combo_box_text import ExtComboBoxItems
 from .gtk_file_filter import (
     Filters,
@@ -42,6 +41,7 @@ from .types import ClassName
 from .ui import UI
 from .values import (
     ArrayValue,
+    ExprValue,
     Flag,
     Flags,
     IdentLiteral,

blueprintcompiler/language/adw_response_dialog.py

@@ -20,7 +20,6 @@
 
 from ..decompiler import decompile_translatable, truthy
 from .common import *
-from .contexts import ValueTypeCtx
 from .gobject_object import ObjectContent, validate_parent_type
 from .values import StringValue
 
@@ -94,10 +93,6 @@ class ExtAdwResponseDialogResponse(AstNode):
             self.value.range.text,
         )
 
-    @context(ValueTypeCtx)
-    def value_type(self) -> ValueTypeCtx:
-        return ValueTypeCtx(StringType())
-
     @validate("id")
     def unique_in_parent(self):
         self.validate_unique_in_parent(

blueprintcompiler/language/attributes.py

@@ -1,32 +0,0 @@
-# attributes.py
-#
-# Copyright 2022 James Westman <james@jwestman.net>
-#
-# This file is free software; you can redistribute it and/or modify it
-# under the terms of the GNU Lesser General Public License as
-# published by the Free Software Foundation; either version 3 of the
-# License, or (at your option) any later version.
-#
-# This file is distributed in the hope that it will be useful, but
-# WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-# Lesser General Public License for more details.
-#
-# You should have received a copy of the GNU Lesser General Public
-# License along with this program.  If not, see <http://www.gnu.org/licenses/>.
-#
-# SPDX-License-Identifier: LGPL-3.0-or-later
-
-
-from .common import *
-
-
-class BaseAttribute(AstNode):
-    """A helper class for attribute syntax of the form `name: literal_value;`"""
-
-    tag_name: str = ""
-    attr_name: str = "name"
-
-    @property
-    def name(self):
-        return self.tokens["name"]

blueprintcompiler/language/contexts.py

@@ -79,3 +79,9 @@ class ScopeCtx:
         for child in node.children:
             if child.context[ScopeCtx] is self:
                 yield from self._iter_recursive(child)
+
+
+@dataclass
+class ExprValueCtx:
+    """Indicates that the context is an expression literal, where the
+    "item" keyword may be used."""

blueprintcompiler/language/expression.py

@@ -38,10 +38,6 @@ class ExprBase(AstNode):
     def type(self) -> T.Optional[GirType]:
         raise NotImplementedError()
 
-    @property
-    def type_complete(self) -> bool:
-        return True
-
     @property
     def rhs(self) -> T.Optional["ExprBase"]:
         if isinstance(self.parent, Expression):
@@ -65,10 +61,6 @@ class Expression(ExprBase):
     def type(self) -> T.Optional[GirType]:
         return self.last.type
 
-    @property
-    def type_complete(self) -> bool:
-        return self.last.type_complete
-
 
 class InfixExpr(ExprBase):
     @property
@@ -89,6 +81,16 @@ class LiteralExpr(ExprBase):
             or self.root.is_legacy_template(self.literal.value.ident)
         )
 
+    @property
+    def is_this(self) -> bool:
+        from .values import IdentLiteral
+
+        return (
+            not self.is_object
+            and isinstance(self.literal.value, IdentLiteral)
+            and self.literal.value.ident == "item"
+        )
+
     @property
     def literal(self):
         from .values import Literal
@@ -99,14 +101,14 @@ class LiteralExpr(ExprBase):
     def type(self) -> T.Optional[GirType]:
         return self.literal.value.type
 
-    @property
-    def type_complete(self) -> bool:
-        from .values import IdentLiteral
+    @validate()
+    def item_validations(self):
+        if self.is_this:
+            if not isinstance(self.rhs, CastExpr):
+                raise CompileError('"item" must be cast to its object type')
 
-        if isinstance(self.literal.value, IdentLiteral):
-            if object := self.context[ScopeCtx].objects.get(self.literal.value.ident):
-                return not object.gir_class.incomplete
-        return True
+            if not isinstance(self.rhs.rhs, LookupOp):
+                raise CompileError('"item" can only be used for looking up properties')
 
 
 class LookupOp(InfixExpr):
@@ -211,10 +213,6 @@ class CastExpr(InfixExpr):
     def type(self) -> T.Optional[GirType]:
         return self.children[TypeName][0].gir_type
 
-    @property
-    def type_complete(self) -> bool:
-        return True
-
     @validate()
     def cast_makes_sense(self):
         if self.type is None or self.lhs.type is None:
@@ -306,6 +304,9 @@ expr.children = [
 def decompile_lookup(
     ctx: DecompileCtx, gir: gir.GirContext, cdata: str, name: str, type: str
 ):
+    if ctx.parent_node is not None and ctx.parent_node.tag == "property":
+        ctx.print("expr ")
+
     if t := ctx.type_by_cname(type):
         type = decompile.full_name(t)
     else:
@@ -325,6 +326,8 @@ def decompile_lookup(
     if constant is not None:
         if constant == ctx.template_class:
             ctx.print("template." + name)
+        elif constant == "":
+            ctx.print("item as <" + type + ">." + name)
         else:
             ctx.print(constant + "." + name)
         return
@@ -339,6 +342,9 @@ def decompile_lookup(
 def decompile_constant(
     ctx: DecompileCtx, gir: gir.GirContext, cdata: str, type: T.Optional[str] = None
 ):
+    if ctx.parent_node is not None and ctx.parent_node.tag == "property":
+        ctx.print("expr ")
+
     if type is None:
         if cdata == ctx.template_class:
             ctx.print("template")
@@ -351,6 +357,9 @@ def decompile_constant(
 
 @decompiler("closure", skip_children=True)
 def decompile_closure(ctx: DecompileCtx, gir: gir.GirContext, function: str, type: str):
+    if ctx.parent_node is not None and ctx.parent_node.tag == "property":
+        ctx.print("expr ")
+
     if t := ctx.type_by_cname(type):
         type = decompile.full_name(t)
     else:

blueprintcompiler/language/gobject_object.py

@@ -28,7 +28,18 @@ from .common import *
 from .response_id import ExtResponse
 from .types import ClassName, ConcreteClassName
 
-RESERVED_IDS = {"this", "self", "template", "true", "false", "null", "none"}
+RESERVED_IDS = {
+    "this",
+    "self",
+    "template",
+    "true",
+    "false",
+    "null",
+    "none",
+    "item",
+    "expr",
+    "typeof",
+}
 
 
 class ObjectContent(AstNode):

blueprintcompiler/language/gobject_property.py

@@ -21,13 +21,12 @@
 from .binding import Binding
 from .common import *
 from .contexts import ValueTypeCtx
-from .gtkbuilder_template import Template
-from .values import ArrayValue, ObjectValue, Value
+from .values import ArrayValue, ExprValue, ObjectValue, Value
 
 
 class Property(AstNode):
     grammar = Statement(
-        UseIdent("name"), ":", AnyOf(Binding, ObjectValue, Value, ArrayValue)
+        UseIdent("name"), ":", AnyOf(Binding, ExprValue, ObjectValue, Value, ArrayValue)
     )
 
     @property
@@ -35,7 +34,7 @@ class Property(AstNode):
         return self.tokens["name"]
 
     @property
-    def value(self) -> T.Union[Binding, ObjectValue, Value, ArrayValue]:
+    def value(self) -> T.Union[Binding, ExprValue, ObjectValue, Value, ArrayValue]:
         return self.children[0]
 
     @property
@@ -51,7 +50,7 @@ class Property(AstNode):
 
     @property
     def document_symbol(self) -> DocumentSymbol:
-        if isinstance(self.value, ObjectValue):
+        if isinstance(self.value, ObjectValue) or self.value is None:
             detail = None
         else:
             detail = self.value.range.text

blueprintcompiler/language/gobject_signal.py

@@ -27,6 +27,7 @@ from .gtkbuilder_template import Template
 class SignalFlag(AstNode):
     grammar = AnyOf(
         UseExact("flag", "swapped"),
+        UseExact("flag", "not-swapped"),
         UseExact("flag", "after"),
     )
 
@@ -40,6 +41,27 @@ class SignalFlag(AstNode):
             f"Duplicate flag '{self.flag}'", lambda x: x.flag == self.flag
         )
 
+    @validate()
+    def swapped_exclusive(self):
+        if self.flag in ["swapped", "not-swapped"]:
+            self.validate_unique_in_parent(
+                "'swapped' and 'not-swapped' flags cannot be used together",
+                lambda x: x.flag in ["swapped", "not-swapped"],
+            )
+
+    @validate()
+    def swapped_unnecessary(self):
+        if self.flag == "not-swapped" and self.parent.object_id is None:
+            raise CompileWarning(
+                "'not-swapped' is the default for handlers that do not specify an object",
+                actions=[CodeAction("Remove 'not-swapped' flag", "")],
+            )
+        elif self.flag == "swapped" and self.parent.object_id is not None:
+            raise CompileWarning(
+                "'swapped' is the default for handlers that specify an object",
+                actions=[CodeAction("Remove 'swapped' flag", "")],
+            )
+
     @docs()
     def ref_docs(self):
         return get_docs_section("Syntax Signal")
@@ -92,9 +114,17 @@ class Signal(AstNode):
     def flags(self) -> T.List[SignalFlag]:
         return self.children[SignalFlag]
 
+    # Returns True if the "swapped" flag is present, False if "not-swapped" is present, and None if neither are present.
+    # GtkBuilder's default if swapped is not specified is to not swap the arguments if no object is specified, and to
+    # swap them if an object is specified.
     @property
-    def is_swapped(self) -> bool:
-        return any(x.flag == "swapped" for x in self.flags)
+    def is_swapped(self) -> T.Optional[bool]:
+        for flag in self.flags:
+            if flag.flag == "swapped":
+                return True
+            elif flag.flag == "not-swapped":
+                return False
+        return None
 
     @property
     def is_after(self) -> bool:
@@ -113,16 +143,17 @@ class Signal(AstNode):
 
     @property
     def document_symbol(self) -> DocumentSymbol:
+        detail = self.ranges["detail_start", "detail_end"]
         return DocumentSymbol(
             self.full_name,
             SymbolKind.Event,
             self.range,
             self.group.tokens["name"].range,
-            self.ranges["detail_start", "detail_end"].text,
+            detail.text if detail is not None else None,
         )
 
     def get_reference(self, idx: int) -> T.Optional[LocationLink]:
-        if idx in self.group.tokens["object"].range:
+        if self.object_id is not None and idx in self.group.tokens["object"].range:
             obj = self.context[ScopeCtx].objects.get(self.object_id)
             if obj is not None:
                 return LocationLink(
@@ -194,15 +225,16 @@ class Signal(AstNode):
 
 
 @decompiler("signal")
-def decompile_signal(
-    ctx, gir, name, handler, swapped="false", after="false", object=None
-):
+def decompile_signal(ctx, gir, name, handler, swapped=None, after="false", object=None):
     object_name = object or ""
     name = name.replace("_", "-")
     line = f"{name} => ${handler}({object_name})"
 
     if decompile.truthy(swapped):
         line += " swapped"
+    elif swapped is not None:
+        line += " not-swapped"
+
     if decompile.truthy(after):
         line += " after"
 

blueprintcompiler/language/gtk_a11y.py

@@ -19,8 +19,6 @@
 
 import typing as T
 
-from ..decompiler import escape_quote
-from .attributes import BaseAttribute
 from .common import *
 from .contexts import ValueTypeCtx
 from .gobject_object import ObjectContent, validate_parent_type
@@ -119,7 +117,7 @@ def _get_docs(gir, name):
         return gir_type.doc
 
 
-class A11yProperty(BaseAttribute):
+class A11yProperty(AstNode):
     grammar = Statement(
         UseIdent("name"),
         ":",

blueprintcompiler/language/gtk_combo_box_text.py

@@ -19,7 +19,6 @@
 
 
 from .common import *
-from .contexts import ValueTypeCtx
 from .gobject_object import ObjectContent, validate_parent_type
 from .values import StringValue
 

blueprintcompiler/language/gtk_list_item_factory.py

@@ -50,7 +50,7 @@ class ExtListItemFactory(AstNode):
         else:
             return self.root.gir.get_type("ListItem", "Gtk")
 
-    @validate("template")
+    @validate("id")
     def container_is_builder_list(self):
         validate_parent_type(
             self,
@@ -59,7 +59,7 @@ class ExtListItemFactory(AstNode):
             "sub-templates",
         )
 
-    @validate("template")
+    @validate("id")
     def unique_in_parent(self):
         self.validate_unique_in_parent("Duplicate template block")
 
@@ -76,7 +76,7 @@ class ExtListItemFactory(AstNode):
                     f"Only Gtk.ListItem, Gtk.ListHeader, Gtk.ColumnViewRow, or Gtk.ColumnViewCell is allowed as a type here"
                 )
 
-    @validate("template")
+    @validate("id")
     def type_name_upgrade(self):
         if self.type_name is None:
             raise UpgradeWarning(
@@ -103,10 +103,7 @@ class ExtListItemFactory(AstNode):
 
     @property
     def action_widgets(self):
-        """
-        The sub-template shouldn't have it`s own actions this is
-        just hear to satisfy XmlOutput._emit_object_or_template
-        """
+        # The sub-template shouldn't have its own actions, this is just here to satisfy XmlOutput._emit_object_or_template
         return None
 
     @docs("id")

blueprintcompiler/language/imports.py

@@ -59,14 +59,8 @@ class GtkDirective(AstNode):
 
     @property
     def gir_namespace(self):
-        # validate the GTK version first to make sure the more specific error
-        # message is emitted
-        self.gtk_version()
-        if self.tokens["version"] is not None:
-            return gir.get_namespace("Gtk", self.tokens["version"])
-        else:
-            # For better error handling, just assume it's 4.0
-            return gir.get_namespace("Gtk", "4.0")
+        # For better error handling, just assume it's 4.0
+        return gir.get_namespace("Gtk", "4.0")
 
     @docs()
     def ref_docs(self):
@@ -90,7 +84,7 @@ class Import(AstNode):
 
     @validate("namespace", "version")
     def namespace_exists(self):
-        gir.get_namespace(self.tokens["namespace"], self.tokens["version"])
+        gir.get_namespace(self.namespace, self.version)
 
     @validate()
     def unused(self):
@@ -106,7 +100,7 @@ class Import(AstNode):
     @property
     def gir_namespace(self):
         try:
-            return gir.get_namespace(self.tokens["namespace"], self.tokens["version"])
+            return gir.get_namespace(self.namespace, self.version)
         except CompileError:
             return None
 

blueprintcompiler/language/values.py

@@ -23,7 +23,8 @@ from blueprintcompiler.gir import ArrayType
 from blueprintcompiler.lsp_utils import SemanticToken
 
 from .common import *
-from .contexts import ScopeCtx, ValueTypeCtx
+from .contexts import ExprValueCtx, ScopeCtx, ValueTypeCtx
+from .expression import Expression
 from .gobject_object import Object
 from .types import TypeName
 
@@ -57,6 +58,19 @@ class Translated(AstNode):
                 f"Cannot convert translated string to {expected_type.full_name}"
             )
 
+    @validate("context")
+    def context_double_quoted(self):
+        if self.translate_context is None:
+            return
+
+        if not str(self.group.tokens["context"]).startswith('"'):
+            raise CompileWarning("gettext may not recognize single-quoted strings")
+
+    @validate("string")
+    def string_double_quoted(self):
+        if not str(self.group.tokens["string"]).startswith('"'):
+            raise CompileWarning("gettext may not recognize single-quoted strings")
+
     @docs()
     def ref_docs(self):
         return get_docs_section("Syntax Translated")
@@ -319,7 +333,12 @@ class IdentLiteral(AstNode):
                 if self.ident == "null":
                     if not self.context[ValueTypeCtx].allow_null:
                         raise CompileError("null is not permitted here")
-                else:
+                elif self.ident == "item":
+                    if not self.context[ExprValueCtx]:
+                        raise CompileError(
+                            '"item" can only be used in an expression literal'
+                        )
+                elif self.ident not in ["true", "false"]:
                     raise CompileError(
                         f"Could not find object with ID {self.ident}",
                         did_you_mean=(
@@ -407,6 +426,35 @@ class ObjectValue(AstNode):
             )
 
 
+class ExprValue(AstNode):
+    grammar = [Keyword("expr"), Expression]
+
+    @property
+    def expression(self) -> Expression:
+        return self.children[Expression][0]
+
+    @validate("expr")
+    def validate_for_type(self) -> None:
+        expected_type = self.parent.context[ValueTypeCtx].value_type
+        expr_type = self.root.gir.get_type("Expression", "Gtk")
+        if expected_type is not None and not expected_type.assignable_to(expr_type):
+            raise CompileError(
+                f"Cannot convert Gtk.Expression to {expected_type.full_name}"
+            )
+
+    @docs("expr")
+    def ref_docs(self):
+        return get_docs_section("Syntax ExprValue")
+
+    @context(ExprValueCtx)
+    def expr_literal(self):
+        return ExprValueCtx()
+
+    @context(ValueTypeCtx)
+    def value_type(self):
+        return ValueTypeCtx(None, must_infer_type=True)
+
+
 class Value(AstNode):
     grammar = AnyOf(Translated, Flags, Literal)
 
@@ -452,6 +500,14 @@ class ArrayValue(AstNode):
                                 range=quoted_literal.range,
                             )
                         )
+                elif isinstance(value.child, Translated):
+                    errors.append(
+                        CompileError(
+                            "Arrays can't contain translated strings",
+                            range=value.child.range,
+                        )
+                    )
+
             if len(errors) > 0:
                 raise MultipleErrors(errors)
 

blueprintcompiler/lsp.py

@@ -118,6 +118,7 @@ class LanguageServer:
         self.client_capabilities = {}
         self.client_supports_completion_choice = False
         self._open_files: T.Dict[str, OpenFile] = {}
+        self._exited = False
 
     def run(self):
         # Read <doc> tags from gir files. During normal compilation these are
@@ -125,7 +126,7 @@ class LanguageServer:
         xml_reader.PARSE_GIR.add("doc")
 
         try:
-            while True:
+            while not self._exited:
                 line = ""
                 content_len = -1
                 while content_len == -1 or (line != "\n" and line != "\r\n"):
@@ -221,6 +222,14 @@ class LanguageServer:
             },
         )
 
+    @command("shutdown")
+    def shutdown(self, id, params):
+        self._send_response(id, None)
+
+    @command("exit")
+    def exit(self, id, params):
+        self._exited = True
+
     @command("textDocument/didOpen")
     def didOpen(self, id, params):
         doc = params.get("textDocument")

blueprintcompiler/outputs/xml/__init__.py

@@ -134,6 +134,11 @@ class XmlOutput(OutputFormat):
                 self._emit_expression(value.expression, xml)
                 xml.end_tag()
 
+        elif isinstance(value, ExprValue):
+            xml.start_tag("property", **props)
+            self._emit_expression(value.expression, xml)
+            xml.end_tag()
+
         elif isinstance(value, ObjectValue):
             xml.start_tag("property", **props)
             self._emit_object(value.object, xml)
@@ -169,7 +174,7 @@ class XmlOutput(OutputFormat):
             "signal",
             name=name,
             handler=signal.handler,
-            swapped=signal.is_swapped or None,
+            swapped=signal.is_swapped,
             after=signal.is_after or None,
             object=(
                 self._object_id(signal, signal.object_id) if signal.object_id else None
@@ -218,12 +223,6 @@ class XmlOutput(OutputFormat):
             xml.put_text(
                 "|".join([str(flag.value or flag.name) for flag in value.child.flags])
             )
-        elif isinstance(value.child, Translated):
-            raise CompilerBugError("translated values must be handled in the parent")
-        elif isinstance(value.child, TypeLiteral):
-            xml.put_text(value.child.type_name.glib_type_name)
-        elif isinstance(value.child, ObjectValue):
-            self._emit_object(value.child.object, xml)
         else:
             raise CompilerBugError()
 
@@ -245,6 +244,9 @@ class XmlOutput(OutputFormat):
             raise CompilerBugError()
 
     def _emit_literal_expr(self, expr: LiteralExpr, xml: XmlEmitter):
+        if expr.is_this:
+            return
+
         if expr.is_object:
             xml.start_tag("constant")
         else:
@@ -366,12 +368,13 @@ class XmlOutput(OutputFormat):
 
         elif isinstance(extension, ExtScaleMarks):
             xml.start_tag("marks")
-            for mark in extension.children:
+            for mark in extension.marks:
+                label = mark.label.child if mark.label is not None else None
                 xml.start_tag(
                     "mark",
                     value=mark.value,
                     position=mark.position,
-                    **self._translated_string_attrs(mark.label and mark.label.child),
+                    **self._translated_string_attrs(label),
                 )
                 if mark.label is not None:
                     xml.put_text(mark.label.string)

blueprintcompiler/outputs/xml/xml_emitter.py

@@ -40,7 +40,9 @@ class XmlEmitter:
         self._tag_stack = []
         self._needs_newline = False
 
-    def start_tag(self, tag, **attrs: T.Union[str, GirType, ClassName, bool, None]):
+    def start_tag(
+        self, tag, **attrs: T.Union[str, GirType, ClassName, bool, None, float]
+    ):
         self._indent()
         self.result += f"<{tag}"
         for key, val in attrs.items():

blueprintcompiler/parse_tree.py

@@ -95,19 +95,11 @@ class ParseGroup:
 
         try:
             return self.ast_type(self, children, self.keys, incomplete=self.incomplete)
-        except TypeError as e:
+        except TypeError:  # pragma: no cover
             raise CompilerBugError(
                 f"Failed to construct ast.{self.ast_type.__name__} from ParseGroup. See the previous stacktrace."
             )
 
-    def __str__(self):
-        result = str(self.ast_type.__name__)
-        result += "".join([f"\n{key}: {val}" for key, val in self.keys.items()]) + "\n"
-        result += "\n".join(
-            [str(child) for children in self.children.values() for child in children]
-        )
-        return result.replace("\n", "\n  ")
-
 
 class ParseContext:
     """Contains the state of the parser."""
@@ -265,10 +257,6 @@ class ParseNode:
         """Convenience method for err()."""
         return self.err("Expected " + expect)
 
-    def warn(self, message) -> "Warning":
-        """Causes this ParseNode to emit a warning if it parses successfully."""
-        return Warning(self, message)
-
 
 class Err(ParseNode):
     """ParseNode that emits a compile error if it fails to parse."""
@@ -290,27 +278,6 @@ class Err(ParseNode):
         return True
 
 
-class Warning(ParseNode):
-    """ParseNode that emits a compile warning if it parses successfully."""
-
-    def __init__(self, child, message: str):
-        self.child = to_parse_node(child)
-        self.message = message
-
-    def _parse(self, ctx: ParseContext):
-        ctx.skip()
-        start_idx = ctx.index
-        if self.child.parse(ctx).succeeded():
-            start_token = ctx.tokens[start_idx]
-            end_token = ctx.tokens[ctx.index]
-            ctx.warnings.append(
-                CompileWarning(self.message, start_token.start, end_token.end)
-            )
-            return True
-        else:
-            return False
-
-
 class Fail(ParseNode):
     """ParseNode that emits a compile error if it parses successfully."""
 

docs/flatpak.rst

@@ -17,7 +17,7 @@ a module in your flatpak manifest:
        {
          "type": "git",
          "url": "https://gitlab.gnome.org/jwestman/blueprint-compiler",
-         "tag": "v0.14.0"
+         "tag": "v0.16.0"
        }
      ]
    }

docs/reference/expressions.rst

@@ -42,8 +42,8 @@ Expressions are composed of property lookups and/or closures. Property lookups a
 
 .. _Syntax LookupExpression:
 
-Lookup Expressions
-------------------
+Lookups
+-------
 
 .. rst-class:: grammar-block
 
@@ -56,8 +56,8 @@ The type of a property expression is the type of the property it refers to.
 
 .. _Syntax ClosureExpression:
 
-Closure Expressions
--------------------
+Closures
+--------
 
 .. rst-class:: grammar-block
 
@@ -72,8 +72,8 @@ Blueprint doesn't know the closure's return type, so closure expressions must be
 
 .. _Syntax CastExpression:
 
-Cast Expressions
-----------------
+Casts
+-----
 
 .. rst-class:: grammar-block
 
@@ -81,7 +81,32 @@ Cast Expressions
 
 Cast expressions allow Blueprint to know the type of an expression when it can't otherwise determine it. This is necessary for closures and for properties of application-defined types.
 
+Example
+~~~~~~~
+
 .. code-block:: blueprint
 
    // Cast the result of the closure so blueprint knows it's a string
-   label: bind $my_closure() as <string>
+   label: bind $format_bytes(template.file-size) as <string>
+
+.. _Syntax ExprValue:
+
+Expression Values
+-----------------
+
+.. rst-class:: grammar-block
+
+   ExprValue = 'expr' :ref:`Expression<Syntax Expression>`
+
+Some APIs take *an expression itself*--not its result--as a property value. For example, `Gtk.BoolFilter <https://docs.gtk.org/gtk4/class.BoolFilter.html>`_ has an ``expression`` property of type `Gtk.Expression <https://docs.gtk.org/gtk4/class.Expression.html>`_. This expression is evaluated for every item in a list model to determine whether the item should be filtered.
+
+To define an expression for such a property, use ``expr`` instead of ``bind``. Inside the expression, you can use the ``item`` keyword to refer to the item being evaluated. You must cast the item to the correct type using the ``as`` keyword, and you can only use ``item`` in a property lookup--you may not pass it to a closure.
+
+Example
+~~~~~~~
+
+.. code-block:: blueprint
+
+   BoolFilter {
+     expression: expr item as <$UserAccount>.active;
+   }

docs/reference/objects.rst

@@ -58,7 +58,7 @@ Properties
 
 .. rst-class:: grammar-block
 
-   Property = <name::ref:`IDENT<Syntax IDENT>`> ':' ( :ref:`Binding<Syntax Binding>` | :ref:`ObjectValue<Syntax ObjectValue>` | :ref:`Value<Syntax Value>` ) ';'
+   Property = <name::ref:`IDENT<Syntax IDENT>`> ':' ( :ref:`Binding<Syntax Binding>` | :ref:`ExprValue<Syntax ExprValue>` | :ref:`ObjectValue<Syntax ObjectValue>` | :ref:`Value<Syntax Value>` ) ';'
 
 Properties specify the details of each object, like a label's text, an image's icon name, or the margins on a container.
 
@@ -91,7 +91,7 @@ Signal Handlers
 .. rst-class:: grammar-block
 
    Signal = <name::ref:`IDENT<Syntax IDENT>`> ('::' <detail::ref:`IDENT<Syntax IDENT>`>)? '=>' '$' <handler::ref:`IDENT<Syntax IDENT>`> '(' <object::ref:`IDENT<Syntax IDENT>`>? ')' (SignalFlag)* ';'
-   SignalFlag = 'after' | 'swapped'
+   SignalFlag = 'after' | 'swapped' | 'not-swapped'
 
 Signals are one way to respond to user input (another is `actions <https://docs.gtk.org/gtk4/actions.html>`_, which use the `action-name property <https://docs.gtk.org/gtk4/property.Actionable.action-name.html>`_).
 
@@ -99,6 +99,8 @@ Signals provide a handle for your code to listen to events in the UI. The handle
 
 Optionally, you can provide an object ID to use when connecting the signal.
 
+The ``swapped`` flag is used to swap the order of the object and userdata arguments in C applications. If an object argument is specified, then this is the default behavior, so the ``not-swapped`` flag can be used to prevent the swap.
+
 Example
 ~~~~~~~
 
@@ -108,7 +110,6 @@ Example
      clicked => $on_button_clicked();
    }
 
-
 .. _Syntax Child:
 
 Children

docs/translations.rst

@@ -24,6 +24,8 @@ If you're using Meson's `i18n module <https://mesonbuild.com/i18n-module.html#i1
 
    i18n.gettext('package name', preset: 'glib')
 
+You must use double quotes for the translated strings in order for gettext to recognize them. Newer versions of blueprint will warn you if you use single quotes.
+
 Contexts
 --------
 

meson.build

@@ -1,5 +1,5 @@
 project('blueprint-compiler',
-  version: '0.14.0',
+  version: '0.16.0',
 )
 
 prefix = get_option('prefix')

tests/formatting/comment_in.blp

@@ -0,0 +1,4 @@
+using Gtk 4.0;
+//comment
+// Trailing whitespace:
+//       

tests/formatting/comment_out.blp

@@ -0,0 +1,4 @@
+using Gtk 4.0;
+// comment
+// Trailing whitespace:
+//

tests/formatting/lists_in.blp

@@ -0,0 +1,21 @@
+using Gtk 4.0;
+
+Box {
+  styles []
+}
+
+Box {
+  styles ["a"]
+}
+
+Box {
+  styles ["a",]
+}
+
+Box {
+  styles ["a", "b"]
+}
+
+Box {
+  styles ["a", "b",]
+}

tests/formatting/lists_out.blp

@@ -0,0 +1,31 @@
+using Gtk 4.0;
+
+Box {
+  styles []
+}
+
+Box {
+  styles [
+    "a",
+  ]
+}
+
+Box {
+  styles [
+    "a",
+  ]
+}
+
+Box {
+  styles [
+    "a",
+    "b",
+  ]
+}
+
+Box {
+  styles [
+    "a",
+    "b",
+  ]
+}

tests/formatting/out.blp

@@ -11,7 +11,7 @@ Overlay {
     notify::icon-name => $on_icon_name_changed(label) swapped;
 
     styles [
-      "destructive"
+      "destructive",
     ]
   }
 

tests/sample_errors/expr_item_not_cast.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+BoolFilter {
+  expression: expr item.visible;
+}

tests/sample_errors/expr_item_not_cast.err

@@ -0,0 +1 @@
+4,20,4,"item" must be cast to its object type

tests/sample_errors/expr_value_assignment.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Label {
+  label: expr 1;
+}

tests/sample_errors/expr_value_assignment.err

@@ -0,0 +1 @@
+4,10,4,Cannot convert Gtk.Expression to string

tests/sample_errors/expr_value_closure_arg.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+BoolFilter {
+  expression: expr $closure(item as <Entry>) as <bool>;
+}

tests/sample_errors/expr_value_closure_arg.err

@@ -0,0 +1 @@
+4,29,4,"item" can only be used for looking up properties

tests/sample_errors/expr_value_item.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+BoolFilter {
+  expression: expr item as <Label>;
+}

tests/sample_errors/expr_value_item.err

@@ -0,0 +1 @@
+4,20,4,"item" can only be used for looking up properties

tests/sample_errors/float_to_int_assignment.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Entry {
+  margin-bottom: 10.5;
+}

tests/sample_errors/float_to_int_assignment.err

@@ -0,0 +1 @@
+4,18,4,Cannot convert 10.5 to integer

tests/sample_errors/incomplete_signal.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Label {
+  notify::
+}

tests/sample_errors/incomplete_signal.err

@@ -0,0 +1,2 @@
+5,1,0,Expected a signal detail name
+4,9,3,Unexpected tokens

tests/sample_errors/int_object.blp

@@ -0,0 +1,3 @@
+using Gtk 4.0;
+
+int {}

tests/sample_errors/int_object.err

@@ -0,0 +1 @@
+3,1,3,int is not a class

tests/sample_errors/menu_assignment.blp

@@ -0,0 +1,7 @@
+using Gtk 4.0;
+
+Overlay {
+  child: my_menu;
+}
+
+menu my_menu {}

tests/sample_errors/menu_assignment.err

@@ -0,0 +1 @@
+4,10,7,Cannot assign Gio.Menu to Gtk.Widget

tests/sample_errors/signal_exclusive_flags.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+$MyObject obj {
+  signal1 => $handler() swapped not-swapped;
+}

tests/sample_errors/signal_exclusive_flags.err

@@ -0,0 +1 @@
+4,33,11,'swapped' and 'not-swapped' flags cannot be used together

tests/sample_errors/signal_unnecessary_flags.blp

@@ -0,0 +1,6 @@
+using Gtk 4.0;
+
+$MyObject obj {
+  signal1 => $handler() not-swapped;
+  signal2 => $handler(obj) swapped;
+}

tests/sample_errors/signal_unnecessary_flags.err

@@ -0,0 +1,2 @@
+4,25,11,'not-swapped' is the default for handlers that do not specify an object
+5,28,7,'swapped' is the default for handlers that specify an object

tests/sample_errors/single_quoted_translated.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Label {
+  label: _('Hello, World!');
+}

tests/sample_errors/single_quoted_translated.err

@@ -0,0 +1 @@
+4,12,15,gettext may not recognize single-quoted strings

tests/sample_errors/string_to_num_assignment.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Entry {
+  margin-bottom: "10";
+}

tests/sample_errors/string_to_num_assignment.err

@@ -0,0 +1 @@
+4,18,4,Cannot convert string to number

tests/sample_errors/string_to_object_assignment.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Button {
+  child: "Click me";
+}

tests/sample_errors/string_to_object_assignment.err

@@ -0,0 +1 @@
+4,10,10,Cannot convert string to Gtk.Widget

tests/sample_errors/string_to_type_assignment.blp

@@ -0,0 +1,6 @@
+using Gtk 4.0;
+using Gio 2.0;
+
+Gio.ListStore {
+  item-type: "Button";
+}

tests/sample_errors/string_to_type_assignment.err

@@ -0,0 +1 @@
+5,14,8,Cannot convert string to GType

tests/sample_errors/translated_assignment.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Button {
+  child: _("Click me");
+}

tests/sample_errors/translated_assignment.err

@@ -0,0 +1 @@
+4,10,13,Cannot convert translated string to Gtk.Widget

tests/sample_errors/translated_string_array.blp

@@ -0,0 +1,7 @@
+using Gtk 4.0;
+
+StringList {
+  strings: [
+    _("Test")
+  ];
+}

tests/sample_errors/translated_string_array.err

@@ -0,0 +1 @@
+5,5,9,Arrays can't contain translated strings

tests/sample_errors/typeof_assignment.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Button {
+  label: typeof<Button>;
+}

tests/sample_errors/typeof_assignment.err

@@ -0,0 +1 @@
+4,10,14,Cannot convert GType to string

tests/sample_errors/unrecognized_syntax.blp

@@ -0,0 +1 @@
+~

tests/sample_errors/unrecognized_syntax.err

@@ -0,0 +1 @@
+1,1,0,Could not determine what kind of syntax is meant here

tests/sample_errors/upgrade_sync_create.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Button btn {
+  label: bind btn.label sync-create;
+}

tests/sample_errors/upgrade_sync_create.err

@@ -0,0 +1 @@
+4,25,11,'sync-create' is now the default. Use 'no-sync-create' if this is not wanted.

tests/sample_errors/upgrade_template_list_item.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+BuilderListItemFactory {
+  template {}
+}

tests/sample_errors/upgrade_template_list_item.err

@@ -0,0 +1 @@
+4,3,8,Expected type name after 'template' keyword

tests/samples/bind_expr_prop.blp

@@ -0,0 +1,9 @@
+using Gtk 4.0;
+
+BoolFilter filter1 {
+  expression: expr true;
+}
+
+BoolFilter filter2 {
+  expression: bind filter1.expression;
+}

tests/samples/bind_expr_prop.ui

@@ -0,0 +1,17 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+DO NOT EDIT!
+This file was @generated by blueprint-compiler. Instead, edit the
+corresponding .blp file and regenerate this file with blueprint-compiler.
+-->
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <object class="GtkBoolFilter" id="filter1">
+    <property name="expression">
+      <constant type="gboolean">true</constant>
+    </property>
+  </object>
+  <object class="GtkBoolFilter" id="filter2">
+    <property name="expression" bind-source="filter1" bind-property="expression" bind-flags="sync-create"/>
+  </object>
+</interface>

tests/samples/bind_literal.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Label {
+  label: bind "Hello, world!";
+}

tests/samples/bind_literal.ui

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+DO NOT EDIT!
+This file was @generated by blueprint-compiler. Instead, edit the
+corresponding .blp file and regenerate this file with blueprint-compiler.
+-->
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <object class="GtkLabel">
+    <binding name="label">
+      <constant type="gchararray">Hello, world!</constant>
+    </binding>
+  </object>
+</interface>

tests/samples/expr_value.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+BoolFilter {
+  expression: expr item as <Entry>.visible;
+}

tests/samples/expr_value.ui

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+DO NOT EDIT!
+This file was @generated by blueprint-compiler. Instead, edit the
+corresponding .blp file and regenerate this file with blueprint-compiler.
+-->
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <object class="GtkBoolFilter">
+    <property name="expression">
+      <lookup name="visible" type="GtkEntry"></lookup>
+    </property>
+  </object>
+</interface>

tests/samples/expr_value_closure.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+BoolFilter {
+  expression: expr $closure(item as <Entry>.visible) as <bool>;
+}

tests/samples/expr_value_closure.ui

@@ -0,0 +1,16 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+DO NOT EDIT!
+This file was @generated by blueprint-compiler. Instead, edit the
+corresponding .blp file and regenerate this file with blueprint-compiler.
+-->
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <object class="GtkBoolFilter">
+    <property name="expression">
+      <closure function="closure" type="gboolean">
+        <lookup name="visible" type="GtkEntry"></lookup>
+      </closure>
+    </property>
+  </object>
+</interface>

tests/samples/expr_value_literal.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+BoolFilter {
+  expression: expr true;
+}

tests/samples/expr_value_literal.ui

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+DO NOT EDIT!
+This file was @generated by blueprint-compiler. Instead, edit the
+corresponding .blp file and regenerate this file with blueprint-compiler.
+-->
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <object class="GtkBoolFilter">
+    <property name="expression">
+      <constant type="gboolean">true</constant>
+    </property>
+  </object>
+</interface>

tests/samples/property_binding.blp

@@ -4,6 +4,7 @@ Box {
   visible: bind box2.visible inverted;
   orientation: bind box2.orientation;
   spacing: bind box2.spacing no-sync-create;
+  tooltip-text: bind box2.tooltip-text bidirectional;
 }
 
 Box box2 {

tests/samples/property_binding.ui

@@ -10,6 +10,7 @@ corresponding .blp file and regenerate this file with blueprint-compiler.
     <property name="visible" bind-source="box2" bind-property="visible" bind-flags="sync-create|invert-boolean"/>
     <property name="orientation" bind-source="box2" bind-property="orientation" bind-flags="sync-create"/>
     <property name="spacing" bind-source="box2" bind-property="spacing"/>
+    <property name="tooltip-text" bind-source="box2" bind-property="tooltip-text" bind-flags="sync-create|bidirectional"/>
   </object>
   <object class="GtkBox" id="box2">
     <property name="spacing">6</property>

tests/samples/property_binding_dec.blp

@@ -1,11 +0,0 @@
-using Gtk 4.0;
-
-Box {
-  visible: bind box2.visible inverted;
-  orientation: bind box2.orientation;
-  spacing: bind box2.spacing no-sync-create;
-}
-
-Box box2 {
-  spacing: 6;
-}

tests/samples/signal_not_swapped.blp

@@ -0,0 +1,5 @@
+using Gtk 4.0;
+
+Button obj {
+  clicked => $handler(obj) not-swapped;
+}

tests/samples/signal_not_swapped.ui

@@ -0,0 +1,12 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<!--
+DO NOT EDIT!
+This file was @generated by blueprint-compiler. Instead, edit the
+corresponding .blp file and regenerate this file with blueprint-compiler.
+-->
+<interface>
+  <requires lib="gtk" version="4.0"/>
+  <object class="GtkButton" id="obj">
+    <signal name="clicked" handler="handler" swapped="False" object="obj"/>
+  </object>
+</interface>

tests/samples/string_array.blp

@@ -5,6 +5,6 @@ AboutDialog about {
 
   authors: [
     "Jane doe <jane-doe@email.com>",
-    "Jhonny D <jd@email.com>"
+    "Jhonny D <jd@email.com>",
   ];
 }

tests/samples/style.blp

@@ -3,6 +3,6 @@ using Gtk 4.0;
 Label {
   styles [
     "class-1",
-    "class-2"
+    "class-2",
   ]
 }

tests/test_formatter.py

@@ -46,3 +46,5 @@ class TestFormatter(unittest.TestCase):
         self.assert_format_test("in2.blp", "out.blp")
         self.assert_format_test("correct1.blp", "correct1.blp")
         self.assert_format_test("string_in.blp", "string_out.blp")
+        self.assert_format_test("comment_in.blp", "comment_out.blp")
+        self.assert_format_test("lists_in.blp", "lists_out.blp")

tests/test_samples.py

@@ -28,6 +28,7 @@ gi.require_version("Gtk", "4.0")
 from gi.repository import Gtk
 
 from blueprintcompiler import decompiler, parser, tokenizer, utils
+from blueprintcompiler.ast_utils import AstNode
 from blueprintcompiler.completions import complete
 from blueprintcompiler.errors import (
     CompileError,
@@ -61,11 +62,14 @@ class TestSamples(unittest.TestCase):
         except:
             pass
 
-    def assert_ast_doesnt_crash(self, text, tokens, ast):
+    def assert_ast_doesnt_crash(self, text, tokens, ast: AstNode):
+        lsp = LanguageServer()
         for i in range(len(text)):
             ast.get_docs(i)
         for i in range(len(text)):
-            list(complete(LanguageServer(), ast, tokens, i))
+            list(complete(lsp, ast, tokens, i))
+        for i in range(len(text)):
+            ast.get_reference(i)
         ast.get_document_symbols()
 
     def assert_sample(self, name, skip_run=False):
@@ -194,8 +198,10 @@ class TestSamples(unittest.TestCase):
                 "adw_breakpoint_template",
                 "expr_closure",
                 "expr_closure_args",
+                "expr_value_closure",
                 "parseable",
                 "signal",
+                "signal_not_swapped",
                 "template",
                 "template_binding",
                 "template_binding_extern",