Convert relative imports to absolute

They honestly seem like a half-baked language feature.

- Relative imports don't allow running a script via shebang line.
- Relative imports don't work without a package, which means they
  don't work in situations other than when absolute imports also work,
  as far as I understand it.
- Relative imports don't work with pytest-textual-snapshot currently,
  so I'm changing it to absolute imports in order to set up testing.

README.md

@@ -357,10 +357,6 @@ Also, note that it might not work with your Git GUI of choice; you may need to u
 
 - Make sure to run the program from the root directory of the repository.
 
-> `ImportError: attempted relative import with no known parent package`
-
-- `paint.py` can only be run as a module, not as a script. I just... I haven't had the heart to remove the shebang line.
-
 ### Linting
 
 ```bash

src/textual_paint/ansi_art_document.py

@@ -21,7 +21,7 @@ from textual_paint.export_templates import (CUSTOM_CONSOLE_HTML_FORMAT,
                                             CUSTOM_CONSOLE_SVG_FORMAT)
 from textual_paint.palette_data import IRC_PALETTE
 
-from .localization.i18n import get as _
+from textual_paint.localization.i18n import get as _
 
 DEBUG_REGION_UPDATES = False
 

src/textual_paint/args.py

@@ -4,7 +4,7 @@ import argparse
 import os
 import re
 
-from .__init__ import DEVELOPMENT, __version__
+from textual_paint.__init__ import DEVELOPMENT, __version__
 
 parser = argparse.ArgumentParser(description='Paint in the terminal.', usage='%(prog)s [options] [filename]', prog="textual-paint")
 parser.add_argument('--version', action='version', version=f'%(prog)s {__version__}')

src/textual_paint/auto_restart.py

@@ -9,8 +9,8 @@ from typing import TYPE_CHECKING
 from textual.app import ScreenStackError
 
 if TYPE_CHECKING:
-    from .gallery import GalleryApp
-    from .paint import PaintApp
+    from textual_paint.gallery import GalleryApp
+    from textual_paint.paint import PaintApp
 
 def restart_program() -> None:
     """Restarts the current program, after resetting terminal state, and cleaning up file objects and descriptors."""

src/textual_paint/edit_colors.py

@@ -15,9 +15,9 @@ from textual.strip import Strip
 from textual.widget import Widget
 from textual.widgets import Button, Input, Label
 
-from .args import args
-from .localization.i18n import get as _
-from .windows import DialogWindow
+from textual_paint.args import args
+from textual_paint.localization.i18n import get as _
+from textual_paint.windows import DialogWindow
 
 # https://github.com/kouzhudong/win2k/blob/ce6323f76d5cd7d136b74427dad8f94ee4c389d2/trunk/private/shell/win16/comdlg/color.c#L38-L43
 # These are a fallback in case colors are not received from some driver.

src/textual_paint/enhanced_directory_tree.py

@@ -10,7 +10,7 @@ from textual.widgets import DirectoryTree, Tree
 from textual.widgets._directory_tree import DirEntry
 from textual.widgets._tree import TOGGLE_STYLE, TreeNode
 
-from .args import args
+from textual_paint.args import args
 
 # Vague skeuomorphism
 # FILE_ICON = Text.from_markup("[#aaaaaa on #ffffff]=[/] " if args.ascii_only else "📄 ")

src/textual_paint/file_dialogs.py

@@ -8,9 +8,9 @@ from textual.widget import Widget
 from textual.widgets import Button, Input, Label, Tree
 from textual.widgets._directory_tree import DirEntry
 
-from .enhanced_directory_tree import EnhancedDirectoryTree
-from .localization.i18n import get as _
-from .windows import DialogWindow
+from textual_paint.enhanced_directory_tree import EnhancedDirectoryTree
+from textual_paint.localization.i18n import get as _
+from textual_paint.windows import DialogWindow
 
 
 class FileDialogWindow(DialogWindow):

src/textual_paint/gallery.py

@@ -13,9 +13,9 @@ from textual.containers import Container, ScrollableContainer
 from textual.reactive import Reactive, var
 from textual.widgets import Footer, Header, Static
 
-from .__init__ import __version__
-from .ansi_art_document import AnsiArtDocument
-from .auto_restart import restart_on_changes, restart_program
+from textual_paint.__init__ import __version__
+from textual_paint.ansi_art_document import AnsiArtDocument
+from textual_paint.auto_restart import restart_on_changes, restart_program
 
 parser = argparse.ArgumentParser(description='ANSI art gallery', usage='%(prog)s [path]', prog="python -m src.textual_paint.gallery")
 parser.add_argument('path', nargs='?', default=None, help='Path to a folder containing ANSI art, or an ANSI file.')
@@ -98,7 +98,7 @@ class GalleryApp(App[None]):
         if not args.inspect_layout:
             return
         # importing the inspector adds instrumentation which can slow down startup
-        from .inspector import Inspector
+        from textual_paint.inspector import Inspector
         inspector = Inspector()
         inspector.display = False
         yield inspector
@@ -263,7 +263,7 @@ class GalleryApp(App[None]):
         if not args.inspect_layout:
             return
         # importing the inspector adds instrumentation which can slow down startup
-        from .inspector import Inspector
+        from textual_paint.inspector import Inspector
         inspector = self.query_one(Inspector)
         inspector.display = not inspector.display
         if not inspector.display:

src/textual_paint/graphics_primitives.py

@@ -5,7 +5,7 @@ from typing import TYPE_CHECKING, Iterator
 from textual.geometry import Offset, Region
 
 if TYPE_CHECKING:
-    from .paint import AnsiArtDocument
+    from textual_paint.paint import AnsiArtDocument
 
 
 def bresenham_walk(x0: int, y0: int, x1: int, y1: int) -> Iterator[tuple[int, int]]:

src/textual_paint/inspector.py

@@ -60,7 +60,7 @@ from textual.widgets import (Button, DataTable, Input, Static, TabbedContent,
                              TabPane, Tree)
 from textual.widgets.tree import TreeNode
 
-from .launch_editor import launch_editor
+from textual_paint.launch_editor import launch_editor
 
 # from textual.css._style_properties import BorderDefinition
 

src/textual_paint/menus.py

@@ -11,8 +11,8 @@ from textual.message import Message
 from textual.reactive import var
 from textual.widgets import Button, Static
 
-from .args import args
-from .localization.i18n import get_direction, get_hotkey, markup_hotkey
+from textual_paint.args import args
+from textual_paint.localization.i18n import get_direction, get_hotkey, markup_hotkey
 
 
 def to_snake_case(name: str) -> str:

src/textual_paint/paint.py

@@ -38,26 +38,26 @@ from textual.widgets import (Button, Header, Input, RadioButton, RadioSet,
 from textual.widgets._header import HeaderIcon
 from textual.worker import get_current_worker  # type: ignore
 
-from .__init__ import __version__
-from .ansi_art_document import (SAVE_DISABLED_FORMATS, AnsiArtDocument,
+from textual_paint.__init__ import __version__
+from textual_paint.ansi_art_document import (SAVE_DISABLED_FORMATS, AnsiArtDocument,
                                 FormatReadNotSupported,
                                 FormatWriteNotSupported, Selection)
-from .args import args, get_help_text
-from .auto_restart import restart_on_changes, restart_program
-from .edit_colors import EditColorsDialogWindow
-from .file_dialogs import OpenDialogWindow, SaveAsDialogWindow
-from .graphics_primitives import (bezier_curve_walk, bresenham_walk,
+from textual_paint.args import args, get_help_text
+from textual_paint.auto_restart import restart_on_changes, restart_program
+from textual_paint.edit_colors import EditColorsDialogWindow
+from textual_paint.file_dialogs import OpenDialogWindow, SaveAsDialogWindow
+from textual_paint.graphics_primitives import (bezier_curve_walk, bresenham_walk,
                                   flood_fill, is_inside_polygon,
                                   midpoint_ellipse, polygon_walk,
                                   polyline_walk, quadratic_curve_walk)
-from .localization.i18n import get as _
-from .localization.i18n import load_language, remove_hotkey
-from .menus import Menu, MenuBar, MenuItem, Separator
-from .palette_data import DEFAULT_PALETTE, IRC_PALETTE
-from .rasterize_ansi_art import rasterize
-from .scrollbars import ASCIIScrollBarRender
-from .wallpaper import get_config_dir, set_wallpaper
-from .windows import (CharacterSelectorDialogWindow, DialogWindow, MessageBox,
+from textual_paint.localization.i18n import get as _
+from textual_paint.localization.i18n import load_language, remove_hotkey
+from textual_paint.menus import Menu, MenuBar, MenuItem, Separator
+from textual_paint.palette_data import DEFAULT_PALETTE, IRC_PALETTE
+from textual_paint.rasterize_ansi_art import rasterize
+from textual_paint.scrollbars import ASCIIScrollBarRender
+from textual_paint.wallpaper import get_config_dir, set_wallpaper
+from textual_paint.windows import (CharacterSelectorDialogWindow, DialogWindow, MessageBox,
                       Window, get_paint_icon, get_question_icon,
                       get_warning_icon)
 
@@ -3009,7 +3009,7 @@ Columns: {len(palette) // 2}
         if not args.inspect_layout:
             return
         # importing the inspector adds instrumentation which can slow down startup
-        from .inspector import Inspector
+        from textual_paint.inspector import Inspector
         inspector = self.query_one(Inspector)
         inspector.display = not inspector.display
         if not inspector.display:
@@ -3108,7 +3108,7 @@ Columns: {len(palette) // 2}
         if not args.inspect_layout:
             return
         # importing the inspector adds instrumentation which can slow down startup
-        from .inspector import Inspector
+        from textual_paint.inspector import Inspector
         inspector = Inspector()
         inspector.display = False
         yield inspector
@@ -4033,7 +4033,7 @@ Columns: {len(palette) // 2}
 if args.ascii_only:
     args.ascii_only_icons = True
 
-    from .ascii_borders import force_ascii_borders
+    from textual_paint.ascii_borders import force_ascii_borders
     force_ascii_borders()
 
     RadioButton.BUTTON_INNER = "*" # "*", "o", "O", "@"

src/textual_paint/windows.py

@@ -14,8 +14,8 @@ from textual.widget import Widget
 from textual.widgets import Button, DataTable, Static
 from typing_extensions import Self
 
-from .args import args
-from .localization.i18n import get as _
+from textual_paint.args import args
+from textual_paint.localization.i18n import get as _
 
 
 class WindowTitleBar(Container):