mirror of
https://github.com/1j01/textual-paint.git
synced 2024-12-22 06:11:37 +03:00
2440 lines
110 KiB
Python
2440 lines
110 KiB
Python
import os
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import re
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import sys
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import psutil
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import argparse
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import asyncio
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from enum import Enum
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from random import randint, random
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from typing import Any, List, Optional, Callable, Iterator, Tuple
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from watchdog.events import PatternMatchingEventHandler, FileSystemEvent, EVENT_TYPE_CLOSED, EVENT_TYPE_OPENED
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from watchdog.observers import Observer
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import stransi
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from rich.segment import Segment
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from rich.style import Style
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from textual import events
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from textual.message import Message
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from textual.app import App, ComposeResult
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from textual.containers import Container
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from textual.geometry import Offset, Region, Size
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from textual.css._style_properties import BorderDefinition
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from textual.reactive import var, reactive
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from textual.strip import Strip
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from textual.widget import Widget
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from textual.widgets import Button, Static, Input, Tree, Header
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from textual.widgets._directory_tree import DirEntry
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from textual.color import Color
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from menus import MenuBar, Menu, MenuItem, Separator
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from windows import Window, DialogWindow, CharacterSelectorDialogWindow, MessageBox, get_warning_icon
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from localization.i18n import get as _, load_language
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from enhanced_directory_tree import EnhancedDirectoryTree
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observer = None
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def restart_program():
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"""Restarts the current program, after file objects and descriptors cleanup"""
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try:
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app.exit()
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# It's meant to eventually call this, but we need it immediately (unless we delay with asyncio perhaps)
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# Otherwise the terminal will be left in a state where you can't (visibly) type anything
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# if you exit the app after reloading, since the new process will pick up the old terminal state.
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app._driver.stop_application_mode() # type: ignore
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except Exception as e:
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print("Error stopping application mode. The command line may not work as expected. The `reset` command should restore it on Linux.", e)
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try:
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try:
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observer.stop()
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observer.join(timeout=1)
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if observer.is_alive:
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print("Timed out waiting for file change observer thread to stop.")
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except RuntimeError as e:
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# Ignore "cannot join current thread" error
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# join() might be redundant, but I'm keeping it just in case something with threading changes in the future
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if str(e) != "cannot join current thread":
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raise
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except Exception as e:
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print("Error stopping file change observer:", e)
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try:
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p = psutil.Process(os.getpid())
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for handler in p.open_files() + p.connections():
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try:
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os.close(handler.fd)
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except Exception as e:
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print(f"Error closing file descriptor ({handler.fd}):", e)
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except Exception as e:
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print("Error closing file descriptors:", e)
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# python = sys.executable
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# os.execl(python, python, *sys.argv)
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os.execl(sys.executable, *sys.orig_argv)
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class RestartHandler(PatternMatchingEventHandler):
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"""A handler for file changes"""
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def on_any_event(self, event: FileSystemEvent):
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if event.event_type in (EVENT_TYPE_CLOSED, EVENT_TYPE_OPENED):
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# These seem like they'd just cause trouble... they're not changes, are they?
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return
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print("Reloading due to FS change:", event.event_type, event.src_path)
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app.screen.styles.background = "red"
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# The unsaved changes prompt seems to need call_from_thread,
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# or else it gets "no running event loop",
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# whereas restart_program() needs to not use it,
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# or else nothing happens.
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# However, when app.action_reload is called from the key binding,
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# it seems to work fine with or without unsaved changes.
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if app.is_document_modified():
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app.call_from_thread(app.action_reload)
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else:
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restart_program()
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app.screen.styles.background = "yellow"
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def restart_on_changes():
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"""Restarts the current program when a file is changed"""
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global observer
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observer = Observer()
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observer.schedule(RestartHandler(
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# Don't need to restart on changes to .css, since Textual will reload them in --dev mode
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# Could include localization files, but I'm not actively localizing this app at this point.
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# WET: WatchDog doesn't match zero directories for **, so we have to split up any patterns that use it.
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patterns=[
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"**/*.py", "*.py"
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],
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ignore_patterns=[
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".history/**/*", ".history/*",
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".vscode/**/*", ".vscode/*",
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".git/**/*", ".git/*",
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"node_modules/**/*", "node_modules/*",
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"__pycache__/**/*", "__pycache__/*",
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"venv/**/*", "venv/*",
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],
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ignore_directories=True,
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), path='.', recursive=True)
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observer.start()
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# These can go away now that args are parsed up top
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ascii_only_icons = False
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inspect_layout = False
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# Command line arguments
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# Please keep in sync with the README
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parser = argparse.ArgumentParser(description='Paint in the terminal.')
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parser.add_argument('--theme', default='light', help='Theme to use, either "light" or "dark"', choices=['light', 'dark'])
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parser.add_argument('--language', default='en', help='Language to use', choices=['ar', 'cs', 'da', 'de', 'el', 'en', 'es', 'fi', 'fr', 'he', 'hu', 'it', 'ja', 'ko', 'nl', 'no', 'pl', 'pt', 'pt-br', 'ru', 'sk', 'sl', 'sv', 'tr', 'zh', 'zh-simplified'])
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parser.add_argument('--ascii-only-icons', action='store_true', help='Use only ASCII characters for tool icons')
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parser.add_argument('--inspect-layout', action='store_true', help='Inspect the layout with middle click, for development')
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# This flag is for development, because it's very confusing
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# to see the error message from the previous run,
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# when a problem is actually solved.
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# There are enough ACTUAL "that should have worked!!" moments to deal with.
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# I really don't want false ones mixed in. You want to reward your brain for finding good solutions, after all.
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parser.add_argument('--clear-screen', action='store_true', help='Clear the screen before starting; useful for development, to avoid seeing fixed errors')
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parser.add_argument('--restart-on-changes', action='store_true', help='Restart the app when the source code is changed, for development')
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parser.add_argument('filename', nargs='?', default=None, help='File to open')
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if __name__ == "<run_path>":
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# Arguments have to be passed like `textual run --dev "paint.py LICENSE.txt"`
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# so we need to look for an argument starting with "paint.py",
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# and parse the rest of the string as arguments.
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args = None
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for arg in sys.argv:
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if arg.startswith("paint.py"):
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args = parser.parse_args(arg[len("paint.py") :].split())
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break
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assert args is not None, "Couldn't find paint.py in command line arguments"
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else:
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args = parser.parse_args()
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load_language(args.language)
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if args.restart_on_changes:
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restart_on_changes()
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# Most arguments are handled at the end of the file.
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class Tool(Enum):
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"""The tools available in the Paint app."""
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free_form_select = 1
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select = 2
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eraser = 3
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fill = 4
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pick_color = 5
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magnifier = 6
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pencil = 7
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brush = 8
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airbrush = 9
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text = 10
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line = 11
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curve = 12
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rectangle = 13
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polygon = 14
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ellipse = 15
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rounded_rectangle = 16
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def get_icon(self) -> str:
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"""Get the icon for this tool."""
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# Alternatives considered:
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# - Free-Form Select: ✂️📐🆓🕸✨⚝🫥🇫/🇸◌⁛⁘ ⢼⠮
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# - Select: ⬚▧🔲 ⣏⣹
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# - Eraser/Color Eraser: 🧼🧽🧹🚫👋🗑️▰▱
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# - Fill With Color: 🌊💦💧🌈🎉🎊🪣🫗
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# - Pick Color: 🎨💉💅💧📌📍⤤𝀃🝯🍶
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# - Magnifier: 🔍🔎👀🔬🔭🧐🕵️♂️🕵️♀️
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# - Pencil: ✏️✎✍️🖎🖊️🖋️✒️🖆📝🖍️
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# - Brush: 🖌️🖌👨🎨🧑🎨💅
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# - Airbrush: 💨ᖜ╔🧴🥤🫠
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# - Text: 🆎📝📄📃🔤📜AＡ
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# - Line: 📏📉📈⟍𝈏╲⧹\⧵∖
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# - Curve: ↪️🪝🌙〰️◡◠~∼≈∽∿〜〰﹋﹏≈≋～⁓
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# - Rectangle: ▭▬▮▯🟥🟧🟨🟩🟦🟪🟫⬛⬜◼️◻️◾◽▪️▫️
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# - Polygon: ▙𝗟𝙇﹄』⬣⬟🔶🔷🔸🔹🔺🔻△▲
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# - Ellipse: ⬭⭕🔴🟠🟡🟢🔵🟣🟤⚫⚪🫧
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# - Rounded Rectangle: ▢⬜⬛
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if ascii_only_icons:
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return {
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Tool.free_form_select: "<[u]^[/]7", # "*" "<^>" "<[u]^[/]7"
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Tool.select: "::", # "#" "::" ":_:" ":[u]:[/]:" ":[u]'[/]:"
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Tool.eraser: "[u]/[/]7", # "47" "27" "/_/" "[u]/[/]7"
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Tool.fill: "[u i]H[/]?", # "#?" "H?" "[u i]F[/]?"
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Tool.pick_color: "[u i] P[/]", # "[u].[/]" "[u i]\\P[/]"
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Tool.magnifier: ",O", # ",O" "o-" "O-" "o=" "O=" "Q"
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Tool.pencil: "-==", # "c==>" "==-"
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Tool.brush: "E)=", # "[u],h.[/u]" "[u],|.[/u]" "[u]h[/u]"
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Tool.airbrush: "[u i]H[/]`<", # "H`" "H`<" "[u i]H[/]`<" "[u i]6[/]<"
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Tool.text: "A", # "Abc"
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Tool.line: "\\",
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Tool.curve: "~", # "~" "S" "s"
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Tool.rectangle: "[_]", # "[]"
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Tool.polygon: "[b]L[/b]", # "L"
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Tool.ellipse: "O", # "()"
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Tool.rounded_rectangle: "(_)",
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}[self]
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return {
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Tool.free_form_select: "⚝",
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Tool.select: "⬚",
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Tool.eraser: "🧼",
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Tool.fill: "🌊", # "🫗" causes jutting out in Ubuntu terminal, "🪣" causes the opposite in VS Code terminal
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Tool.pick_color: "💉",
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Tool.magnifier: "🔍",
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Tool.pencil: "✏️",
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Tool.brush: "🖌️",
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Tool.airbrush: "💨",
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Tool.text: "Ａ",
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Tool.line: "⟍",
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Tool.curve: "～",
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Tool.rectangle: "▭",
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Tool.polygon: "𝙇",
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Tool.ellipse: "⬭",
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Tool.rounded_rectangle: "▢",
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}[self]
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def get_name(self) -> str:
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"""Get the localized name for this tool.
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Not to be confused with tool.name, which is an identifier."""
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return {
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Tool.free_form_select: _("Free-Form Select"),
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Tool.select: _("Select"),
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Tool.eraser: _("Eraser/Color Eraser"),
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Tool.fill: _("Fill With Color"),
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Tool.pick_color: _("Pick Color"),
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Tool.magnifier: _("Magnifier"),
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Tool.pencil: _("Pencil"),
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Tool.brush: _("Brush"),
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Tool.airbrush: _("Airbrush"),
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Tool.text: _("Text"),
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Tool.line: _("Line"),
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Tool.curve: _("Curve"),
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Tool.rectangle: _("Rectangle"),
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Tool.polygon: _("Polygon"),
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Tool.ellipse: _("Ellipse"),
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Tool.rounded_rectangle: _("Rounded Rectangle"),
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}[self]
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palette = [
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"rgb(0,0,0)", # Black
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"rgb(128,128,128)", # Dark Gray
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"rgb(128,0,0)", # Dark Red
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"rgb(128,128,0)", # Pea Green
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"rgb(0,128,0)", # Dark Green
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"rgb(0,128,128)", # Slate
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"rgb(0,0,128)", # Dark Blue
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"rgb(128,0,128)", # Lavender
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"rgb(128,128,64)",
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"rgb(0,64,64)",
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"rgb(0,128,255)",
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"rgb(0,64,128)",
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"rgb(64,0,255)",
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"rgb(128,64,0)",
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"rgb(255,255,255)", # White
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"rgb(192,192,192)", # Light Gray
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"rgb(255,0,0)", # Bright Red
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"rgb(255,255,0)", # Yellow
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"rgb(0,255,0)", # Bright Green
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"rgb(0,255,255)", # Cyan
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"rgb(0,0,255)", # Bright Blue
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"rgb(255,0,255)", # Magenta
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"rgb(255,255,128)",
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"rgb(0,255,128)",
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"rgb(128,255,255)",
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"rgb(128,128,255)",
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"rgb(255,0,128)",
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"rgb(255,128,64)",
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]
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class ToolsBox(Container):
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"""Widget containing tool buttons"""
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class ToolSelected(Message):
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"""Message sent when a tool is selected."""
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def __init__(self, tool: Tool) -> None:
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self.tool = tool
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super().__init__()
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def compose(self) -> ComposeResult:
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"""Add our buttons."""
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self.tool_by_button: dict[Button, Tool] = {}
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for tool in Tool:
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# TODO: tooltip with tool.get_name()
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button = Button(tool.get_icon(), classes="tool_button")
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button.can_focus = False
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self.tool_by_button[button] = tool
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yield button
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def on_button_pressed(self, event: Button.Pressed) -> None:
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"""Called when a button is clicked."""
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if "tool_button" in event.button.classes:
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self.post_message(self.ToolSelected(self.tool_by_button[event.button]))
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class CharInput(Input):
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"""Widget for entering a single character."""
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class CharSelected(Message):
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"""Message sent when a character is selected."""
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def __init__(self, char: str) -> None:
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self.char = char
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super().__init__()
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def validate_value(self, value: str) -> str:
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"""Limit the value to a single character."""
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return value[-1] if value else " "
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def watch_value(self, value: str) -> None:
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"""Called when value changes."""
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self.post_message(self.CharSelected(value))
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def validate_cursor_position(self, position: int) -> int:
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"""Force the cursor position to 0 so that it's over the character."""
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return 0
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def insert_text_at_cursor(self, text: str) -> None:
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"""Override to limit the value to a single character."""
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self.value = text[-1] if text else " "
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last_click_time = 0
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def on_click(self, event: events.Click) -> None:
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"""Detect double click and open character selector dialog."""
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if event.time - self.last_click_time < 0.8:
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assert isinstance(self.app, PaintApp)
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self.app.action_open_character_selector()
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self.last_click_time = event.time
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class ColorsBox(Container):
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"""Color palette widget."""
|
||
|
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class ColorSelected(Message):
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"""Message sent when a color is selected."""
|
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def __init__(self, color: str) -> None:
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self.color = color
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super().__init__()
|
||
|
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def compose(self) -> ComposeResult:
|
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"""Add our selected color and color well buttons."""
|
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self.color_by_button: dict[Button, str] = {}
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with Container(id="palette_selection_box"):
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# This widget is doing double duty, showing the current color
|
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# and showing/editing the current character.
|
||
# I haven't settled on naming for this yet.
|
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yield CharInput(id="selected_color_char_input", classes="color_well")
|
||
with Container(id="available_colors"):
|
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for color in palette:
|
||
button = Button("", classes="color_button color_well")
|
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button.styles.background = color
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||
button.can_focus = False
|
||
self.color_by_button[button] = color
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||
yield button
|
||
|
||
def on_button_pressed(self, event: Button.Pressed) -> None:
|
||
"""Called when a button is clicked."""
|
||
|
||
if "color_button" in event.button.classes:
|
||
self.post_message(self.ColorSelected(self.color_by_button[event.button]))
|
||
|
||
|
||
class Selection:
|
||
"""
|
||
A selection within an AnsiArtDocument.
|
||
|
||
AnsiArtDocument can contain a Selection, and Selection can contain an AnsiArtDocument.
|
||
However, the selection's AnsiArtDocument should never itself contain a Selection.
|
||
|
||
When a selection is created, it has no image data, but once it's dragged,
|
||
it gets a copy of the image data from the document.
|
||
The image data is stored as an AnsiArtDocument, since it's made up of characters and colors.
|
||
"""
|
||
def __init__(self, region: Region) -> None:
|
||
"""Initialize a selection."""
|
||
self.region: Region = region
|
||
"""The region of the selection within the outer document."""
|
||
self.contained_image: Optional[AnsiArtDocument] = None
|
||
"""The image data contained in the selection, None until dragged, except for text boxes."""
|
||
self.textbox_mode = False
|
||
"""Whether the selection is a text box. Either way it's text, but it's a different editing mode."""
|
||
self.text_selection_start = Offset(0, 0)
|
||
"""The start position of the text selection within the text box. This may be before or after the end."""""
|
||
self.text_selection_end = Offset(0, 0)
|
||
"""The end position of the text selection within the text box. This may be before or after the start."""""
|
||
self.mask: Optional[list[list[bool]]] = None
|
||
"""A mask of the selection to cut out, used for Free-Form Select tool. Coordinates are relative to the selection region."""
|
||
|
||
def copy_from_document(self, document: 'AnsiArtDocument') -> None:
|
||
"""Copy the image data from the document into the selection."""
|
||
self.contained_image = AnsiArtDocument(self.region.width, self.region.height)
|
||
self.contained_image.copy_region(source=document, source_region=self.region)
|
||
|
||
def copy_to_document(self, document: 'AnsiArtDocument') -> None:
|
||
"""Draw the selection onto the document."""
|
||
if not self.contained_image:
|
||
# raise ValueError("Selection has no image data.")
|
||
return
|
||
target_region = self.region.intersection(Region(0, 0, document.width, document.height))
|
||
document.copy_region(source=self.contained_image, target_region=target_region, mask=self.mask)
|
||
|
||
|
||
debug_region_updates = False
|
||
|
||
ansi_escape_pattern = re.compile(r"(\N{ESC}\[[\d;]*[a-zA-Z])")
|
||
|
||
class AnsiArtDocument:
|
||
"""A document that can be rendered as ANSI."""
|
||
|
||
def __init__(self, width: int, height: int) -> None:
|
||
"""Initialize the document."""
|
||
self.width = width
|
||
self.height = height
|
||
self.ch = [[" " for _ in range(width)] for _ in range(height)]
|
||
self.bg = [["#ffffff" for _ in range(width)] for _ in range(height)]
|
||
self.fg = [["#000000" for _ in range(width)] for _ in range(height)]
|
||
self.selection: Optional[Selection] = None
|
||
|
||
def copy_region(self, source: 'AnsiArtDocument', source_region: Region|None = None, target_region: Region|None = None, mask: list[list[bool]]|None = None) -> None:
|
||
if source_region is None:
|
||
source_region = Region(0, 0, source.width, source.height)
|
||
if target_region is None:
|
||
target_region = Region(0, 0, source_region.width, source_region.height)
|
||
source_offset = source_region.offset
|
||
target_offset = target_region.offset
|
||
random_color: Optional[str] = None # avoid "possibly unbound"
|
||
if debug_region_updates:
|
||
random_color = "rgb(" + str(randint(0, 255)) + "," + str(randint(0, 255)) + "," + str(randint(0, 255)) + ")"
|
||
for y in range(target_region.height):
|
||
for x in range(target_region.width):
|
||
if source_region.contains(x + source_offset.x, y + source_offset.y) and (mask is None or mask[y][x]):
|
||
self.ch[y + target_offset.y][x + target_offset.x] = source.ch[y + source_offset.y][x + source_offset.x]
|
||
self.bg[y + target_offset.y][x + target_offset.x] = source.bg[y + source_offset.y][x + source_offset.x]
|
||
self.fg[y + target_offset.y][x + target_offset.x] = source.fg[y + source_offset.y][x + source_offset.x]
|
||
if debug_region_updates:
|
||
assert random_color is not None
|
||
# self.bg[y + target_offset.y][x + target_offset.x] = "rgb(" + str((x + source_offset.x) * 255 // self.width) + "," + str((y + source_offset.y) * 255 // self.height) + ",0)"
|
||
self.bg[y + target_offset.y][x + target_offset.x] = random_color
|
||
else:
|
||
if debug_region_updates:
|
||
self.ch[y + target_offset.y][x + target_offset.x] = "?"
|
||
self.bg[y + target_offset.y][x + target_offset.x] = "#ff00ff"
|
||
self.fg[y + target_offset.y][x + target_offset.x] = "#000000"
|
||
|
||
def get_ansi(self) -> str:
|
||
"""Get the ANSI representation of the document."""
|
||
# TODO: try using Rich API to generate ANSI, like how the Canvas renders to the screen
|
||
# TODO: generate more efficient ANSI, e.g. don't repeat the same color codes
|
||
def color_to_rgb(color_code: str) -> str:
|
||
"""Convert a color code to the RGB values format used for ANSI escape codes."""
|
||
if color_code.startswith('#'):
|
||
# Convert hex code to RGB values
|
||
color_code = color_code.lstrip('#')
|
||
rgb = tuple(int(color_code[i:i+2], 16) for i in (0, 2, 4))
|
||
elif color_code.startswith('rgb(') and color_code.endswith(')'):
|
||
# Convert "rgb(r,g,b)" style to RGB values
|
||
rgb_str = color_code[4:-1]
|
||
rgb = tuple(int(x.strip()) for x in rgb_str.split(','))
|
||
else:
|
||
raise ValueError("Invalid color code")
|
||
return f"{rgb[0]};{rgb[1]};{rgb[2]}"
|
||
|
||
ansi = ""
|
||
for y in range(self.height):
|
||
for x in range(self.width):
|
||
if x == 0:
|
||
ansi += "\033[0m"
|
||
ansi += "\033[48;2;" + color_to_rgb(self.bg[y][x]) + ";38;2;" + color_to_rgb(self.fg[y][x]) + "m" + self.ch[y][x]
|
||
ansi += "\033[0m\r\n"
|
||
return ansi
|
||
|
||
def get_html(self) -> str:
|
||
"""Get the HTML representation of the document."""
|
||
html = ""
|
||
for y in range(self.height):
|
||
for x in range(self.width):
|
||
html += "<span style='background-color:" + self.bg[y][x] + ";color:" + self.fg[y][x] + "'>" + self.ch[y][x] + "</span>"
|
||
html += "<br>"
|
||
return html
|
||
|
||
@staticmethod
|
||
def from_ascii(text: str) -> 'AnsiArtDocument':
|
||
"""Creates a document from the given ASCII plain text."""
|
||
lines = text.splitlines()
|
||
width = 0
|
||
for line in lines:
|
||
width = max(len(line), width)
|
||
height = len(lines)
|
||
document = AnsiArtDocument(width, height)
|
||
for y, line in enumerate(lines):
|
||
for x, char in enumerate(line):
|
||
document.ch[y][x] = char
|
||
return document
|
||
|
||
@staticmethod
|
||
def from_ansi(text: str) -> 'AnsiArtDocument':
|
||
"""Creates a document from the given ANSI text."""
|
||
# TODO: use Rich API to render ANSI to a virtual screen,
|
||
# and remove dependency on stransi
|
||
ansi = stransi.Ansi(text)
|
||
document = AnsiArtDocument(1, 1)
|
||
width = 1
|
||
height = 1
|
||
|
||
x = 0
|
||
y = 0
|
||
bg_color = "#000000"
|
||
fg_color = "#ffffff"
|
||
for instruction in ansi.instructions():
|
||
if isinstance(instruction, str):
|
||
# Text
|
||
for char in instruction:
|
||
if char == '\r':
|
||
x = 0
|
||
elif char == '\n':
|
||
x = 0
|
||
y += 1
|
||
height = max(y, height)
|
||
if len(document.ch) <= y:
|
||
document.ch.append([])
|
||
document.bg.append([])
|
||
document.fg.append([])
|
||
else:
|
||
x += 1
|
||
width = max(x, width)
|
||
document.ch[y].append(char)
|
||
document.bg[y].append(bg_color)
|
||
document.fg[y].append(fg_color)
|
||
elif isinstance(instruction, stransi.SetColor) and instruction.color is not None:
|
||
# Color (I'm not sure why instruction.color would be None, but it's typed as Optional[Color])
|
||
# (maybe just for initial state?)
|
||
if instruction.role == stransi.color.ColorRole.FOREGROUND:
|
||
rgb = instruction.color.rgb
|
||
fg_color = "rgb(" + str(int(rgb.red * 255)) + "," + str(int(rgb.green * 255)) + "," + str(int(rgb.blue * 255)) + ")"
|
||
elif instruction.role == stransi.color.ColorRole.BACKGROUND:
|
||
rgb = instruction.color.rgb
|
||
bg_color = "rgb(" + str(int(rgb.red * 255)) + "," + str(int(rgb.green * 255)) + "," + str(int(rgb.blue * 255)) + ")"
|
||
elif isinstance(instruction, stransi.SetAttribute):
|
||
# Attribute
|
||
pass
|
||
else:
|
||
raise ValueError("Unknown instruction type")
|
||
document.width = width
|
||
document.height = height
|
||
# Fill in the rest of the lines
|
||
# just using the last color, not sure if that's correct...
|
||
for y in range(document.height):
|
||
for x in range(document.width - len(document.ch[y])):
|
||
document.ch[y].append(' ')
|
||
document.bg[y].append(bg_color)
|
||
document.fg[y].append(fg_color)
|
||
return document
|
||
|
||
@staticmethod
|
||
def from_text(text: str) -> 'AnsiArtDocument':
|
||
"""Creates a document from the given text, detecting if uses ANSI or not."""
|
||
if ansi_escape_pattern.search(text):
|
||
return AnsiArtDocument.from_ansi(text)
|
||
else:
|
||
return AnsiArtDocument.from_ascii(text)
|
||
|
||
class Action:
|
||
"""An action that can be undone efficiently using a region update."""
|
||
|
||
def __init__(self, name: str, document: AnsiArtDocument, region: Region|None = None) -> None:
|
||
"""Initialize the action using the document state before modification."""
|
||
if region is None:
|
||
region = Region(0, 0, document.width, document.height)
|
||
self.name = name
|
||
self.region = region
|
||
self.update(document)
|
||
|
||
def update(self, document: AnsiArtDocument) -> None:
|
||
"""Grabs the image data from the current region of the document."""
|
||
if self.region:
|
||
self.sub_image_before = AnsiArtDocument(self.region.width, self.region.height)
|
||
self.sub_image_before.copy_region(document, self.region)
|
||
|
||
def undo(self, target_document: AnsiArtDocument) -> None:
|
||
"""Undo this action. Note that a canvas refresh is not performed here."""
|
||
target_document.copy_region(self.sub_image_before, target_region=self.region)
|
||
|
||
def bresenham_walk(x0: int, y0: int, x1: int, y1: int) -> Iterator[Tuple[int, int]]:
|
||
"""Bresenham's line algorithm"""
|
||
dx = abs(x1 - x0)
|
||
dy = abs(y1 - y0)
|
||
sx = 1 if x0 < x1 else -1
|
||
sy = 1 if y0 < y1 else -1
|
||
err = dx - dy
|
||
while True:
|
||
yield x0, y0
|
||
if x0 == x1 and y0 == y1:
|
||
break
|
||
e2 = 2 * err
|
||
if e2 > -dy:
|
||
err = err - dy
|
||
x0 = x0 + sx
|
||
if e2 < dx:
|
||
err = err + dx
|
||
y0 = y0 + sy
|
||
|
||
|
||
def polygon_walk(points: List[Offset]) -> Iterator[Tuple[int, int]]:
|
||
"""Yields points along the perimeter of a polygon."""
|
||
for i in range(len(points)):
|
||
yield from bresenham_walk(
|
||
points[i][0],
|
||
points[i][1],
|
||
points[(i + 1) % len(points)][0],
|
||
points[(i + 1) % len(points)][1]
|
||
)
|
||
|
||
def polyline_walk(points: List[Offset]) -> Iterator[Tuple[int, int]]:
|
||
"""Yields points along a polyline (unclosed polygon)."""
|
||
for i in range(len(points) - 1):
|
||
yield from bresenham_walk(
|
||
points[i][0],
|
||
points[i][1],
|
||
points[i + 1][0],
|
||
points[i + 1][1]
|
||
)
|
||
|
||
def is_inside_polygon(x: int, y: int, points: List[Offset]) -> bool:
|
||
"""Returns True if the point is inside the polygon."""
|
||
# https://stackoverflow.com/a/217578
|
||
n = len(points)
|
||
inside = False
|
||
p1x, p1y = points[0]
|
||
for i in range(n + 1):
|
||
p2x, p2y = points[i % n]
|
||
if y > min(p1y, p2y):
|
||
if y <= max(p1y, p2y):
|
||
if x <= max(p1x, p2x):
|
||
if p1y != p2y:
|
||
xinters = (y - p1y) * (p2x - p1x) / (p2y - p1y) + p1x
|
||
if p1x == p2x or x <= xinters:
|
||
inside = not inside
|
||
p1x, p1y = p2x, p2y
|
||
return inside
|
||
|
||
# def polygon_fill(points: List[Offset]) -> Iterator[Tuple[int, int]]:
|
||
# """Yields points inside a polygon."""
|
||
|
||
# # Find the bounding box
|
||
# min_x = min(points, key=lambda p: p[0])[0]
|
||
# min_y = min(points, key=lambda p: p[1])[1]
|
||
# max_x = max(points, key=lambda p: p[0])[0]
|
||
# max_y = max(points, key=lambda p: p[1])[1]
|
||
|
||
# # Check each point in the bounding box, and yield any points that are inside the polygon
|
||
# for x in range(min_x, max_x + 1):
|
||
# for y in range(min_y, max_y + 1):
|
||
# if is_inside_polygon(x, y, points):
|
||
# yield x, y
|
||
|
||
# adapted from https://github.com/Pomax/bezierjs
|
||
def compute_bezier(t: float, start_x: float, start_y: float, control_1_x: float, control_1_y: float, control_2_x: float, control_2_y: float, end_x: float, end_y: float):
|
||
mt = 1 - t
|
||
mt2 = mt * mt
|
||
t2 = t * t
|
||
|
||
a = mt2 * mt
|
||
b = mt2 * t * 3
|
||
c = mt * t2 * 3
|
||
d = t * t2
|
||
|
||
return (
|
||
a * start_x + b * control_1_x + c * control_2_x + d * end_x,
|
||
a * start_y + b * control_1_y + c * control_2_y + d * end_y,
|
||
)
|
||
|
||
# It's possible to walk a bezier curve more correctly,
|
||
# but is it possible to tell the difference?
|
||
def bezier_curve_walk(start_x: float, start_y: float, control_1_x: float, control_1_y: float, control_2_x: float, control_2_y: float, end_x: float, end_y: float):
|
||
"""Yields points along a bezier curve."""
|
||
steps = 100
|
||
point_a = (start_x, start_y)
|
||
# TypeError: 'float' object cannot be interpreted as an integer
|
||
# for t in range(0, 1, 1 / steps):
|
||
for i in range(steps):
|
||
t = i / steps
|
||
point_b = compute_bezier(t, start_x, start_y, control_1_x, control_1_y, control_2_x, control_2_y, end_x, end_y)
|
||
yield from bresenham_walk(int(point_a[0]), int(point_a[1]), int(point_b[0]), int(point_b[1]))
|
||
point_a = point_b
|
||
|
||
def quadratic_curve_walk(start_x: float, start_y: float, control_x: float, control_y: float, end_x: float, end_y: float):
|
||
"""Yields points along a quadratic curve."""
|
||
return bezier_curve_walk(start_x, start_y, control_x, control_y, control_x, control_y, end_x, end_y)
|
||
|
||
def midpoint_ellipse(xc: int, yc: int, rx: int, ry: int) -> Iterator[Tuple[int, int]]:
|
||
"""Midpoint ellipse drawing algorithm. Yields points out of order, and thus can't legally be called a "walk", except in Britain."""
|
||
# Source: https://www.geeksforgeeks.org/midpoint-ellipse-drawing-algorithm/
|
||
|
||
x = 0
|
||
y = ry
|
||
|
||
# Initial decision parameter of region 1
|
||
d1 = ((ry * ry) - (rx * rx * ry) +
|
||
(0.25 * rx * rx))
|
||
dx = 2 * ry * ry * x
|
||
dy = 2 * rx * rx * y
|
||
|
||
# For region 1
|
||
while (dx < dy):
|
||
# Yield points based on 4-way symmetry
|
||
yield x + xc, y + yc
|
||
yield -x + xc, y + yc
|
||
yield x + xc, -y + yc
|
||
yield -x + xc, -y + yc
|
||
|
||
# Checking and updating value of
|
||
# decision parameter based on algorithm
|
||
if (d1 < 0):
|
||
x += 1
|
||
dx = dx + (2 * ry * ry)
|
||
d1 = d1 + dx + (ry * ry)
|
||
else:
|
||
x += 1
|
||
y -= 1
|
||
dx = dx + (2 * ry * ry)
|
||
dy = dy - (2 * rx * rx)
|
||
d1 = d1 + dx - dy + (ry * ry)
|
||
|
||
# Decision parameter of region 2
|
||
d2 = (((ry * ry) * ((x + 0.5) * (x + 0.5))) +
|
||
((rx * rx) * ((y - 1) * (y - 1))) -
|
||
(rx * rx * ry * ry))
|
||
|
||
# Plotting points of region 2
|
||
while (y >= 0):
|
||
# Yielding points based on 4-way symmetry
|
||
yield x + xc, y + yc
|
||
yield -x + xc, y + yc
|
||
yield x + xc, -y + yc
|
||
yield -x + xc, -y + yc
|
||
|
||
# Checking and updating parameter
|
||
# value based on algorithm
|
||
if (d2 > 0):
|
||
y -= 1
|
||
dy = dy - (2 * rx * rx)
|
||
d2 = d2 + (rx * rx) - dy
|
||
else:
|
||
y -= 1
|
||
x += 1
|
||
dx = dx + (2 * ry * ry)
|
||
dy = dy - (2 * rx * rx)
|
||
d2 = d2 + dx - dy + (rx * rx)
|
||
|
||
def flood_fill(document: AnsiArtDocument, x: int, y: int, fill_ch: str, fill_fg: str, fill_bg: str) -> Region|None:
|
||
"""Flood fill algorithm."""
|
||
|
||
# Get the original value of the cell.
|
||
# This is the color to be replaced.
|
||
original_fg = document.fg[y][x]
|
||
original_bg = document.bg[y][x]
|
||
original_ch = document.ch[y][x]
|
||
|
||
# Track the region affected by the fill.
|
||
min_x = x
|
||
min_y = y
|
||
max_x = x
|
||
max_y = y
|
||
|
||
def inside(x: int, y: int) -> bool:
|
||
"""Returns true if the cell at the given coordinates matches the color to be replaced. Treats foreground color as equal if character is a space."""
|
||
if x < 0 or x >= document.width or y < 0 or y >= document.height:
|
||
return False
|
||
return (
|
||
document.ch[y][x] == original_ch and
|
||
document.bg[y][x] == original_bg and
|
||
(original_ch == " " or document.fg[y][x] == original_fg)
|
||
)
|
||
|
||
def set_cell(x: int, y: int) -> None:
|
||
"""Sets the cell at the given coordinates to the fill color, and updates the region bounds."""
|
||
document.ch[y][x] = fill_ch
|
||
document.fg[y][x] = fill_fg
|
||
document.bg[y][x] = fill_bg
|
||
nonlocal min_x, min_y, max_x, max_y
|
||
min_x = min(min_x, x)
|
||
min_y = min(min_y, y)
|
||
max_x = max(max_x, x)
|
||
max_y = max(max_y, y)
|
||
|
||
# Simple translation of the "final, combined-scan-and-fill span filler"
|
||
# pseudo-code from https://en.wikipedia.org/wiki/Flood_fill
|
||
if not inside(x, y):
|
||
return
|
||
stack: list[tuple[int, int, int, int]] = [(x, x, y, 1), (x, x, y - 1, -1)]
|
||
while stack:
|
||
x1, x2, y, dy = stack.pop()
|
||
x = x1
|
||
if inside(x, y):
|
||
while inside(x - 1, y):
|
||
set_cell(x - 1, y)
|
||
x = x - 1
|
||
if x < x1:
|
||
stack.append((x, x1-1, y-dy, -dy))
|
||
while x1 <= x2:
|
||
while inside(x1, y):
|
||
set_cell(x1, y)
|
||
x1 = x1 + 1
|
||
stack.append((x, x1 - 1, y+dy, dy))
|
||
if x1 - 1 > x2:
|
||
stack.append((x2 + 1, x1 - 1, y-dy, -dy))
|
||
x1 = x1 + 1
|
||
while x1 < x2 and not inside(x1, y):
|
||
x1 = x1 + 1
|
||
x = x1
|
||
|
||
# Return the affected region.
|
||
return Region(min_x, min_y, max_x - min_x + 1, max_y - min_y + 1)
|
||
|
||
def scale_region(region: Region, scale: int) -> Region:
|
||
"""Returns the region scaled by the given factor."""
|
||
return Region(region.x * scale, region.y * scale, region.width * scale, region.height * scale)
|
||
|
||
class Canvas(Widget):
|
||
"""The image document widget."""
|
||
|
||
magnification = reactive(1, layout=True)
|
||
|
||
# Is it kosher to include an event in a message?
|
||
# Is it better (and possible) to bubble up the event, even though I'm capturing the mouse?
|
||
# Or would it be better to just have Canvas own duplicate state for all tool parameters?
|
||
# That's what I was refactoring to avoid. So far I've made things more complicated,
|
||
# but I'm betting it will be good when implementing different tools.
|
||
# Maybe the PaintApp widget can capture the mouse events instead?
|
||
# Not sure if that would work as nicely when implementing selections.
|
||
# I'd have to think about it.
|
||
# But it would make the Canvas just be a widget for rendering, which seems good.
|
||
class ToolStart(Message):
|
||
"""Message when starting drawing."""
|
||
|
||
def __init__(self, mouse_down_event: events.MouseDown) -> None:
|
||
self.mouse_down_event = mouse_down_event
|
||
super().__init__()
|
||
|
||
class ToolUpdate(Message):
|
||
"""Message when dragging on the canvas."""
|
||
|
||
def __init__(self, mouse_move_event: events.MouseMove) -> None:
|
||
self.mouse_move_event = mouse_move_event
|
||
super().__init__()
|
||
|
||
class ToolStop(Message):
|
||
"""Message when releasing the mouse."""
|
||
|
||
def __init__(self, mouse_up_event: events.MouseUp) -> None:
|
||
self.mouse_up_event = mouse_up_event
|
||
super().__init__()
|
||
|
||
class ToolPreviewUpdate(Message):
|
||
"""Message when moving the mouse while the mouse is up."""
|
||
|
||
def __init__(self, mouse_move_event: events.MouseMove) -> None:
|
||
self.mouse_move_event = mouse_move_event
|
||
super().__init__()
|
||
|
||
class ToolPreviewStop(Message):
|
||
"""Message when the mouse leaves the canvas while previewing (not while drawing)."""
|
||
|
||
def __init__(self) -> None:
|
||
super().__init__()
|
||
|
||
def __init__(self, **kwargs: Any) -> None:
|
||
"""Initialize the canvas."""
|
||
super().__init__(**kwargs)
|
||
self.image: AnsiArtDocument|None = None
|
||
self.pointer_active: bool = False
|
||
self.magnifier_preview_region: Optional[Region] = None
|
||
self.select_preview_region: Optional[Region] = None
|
||
|
||
def on_mouse_down(self, event: events.MouseDown) -> None:
|
||
# self.fix_mouse_event(event) # not needed, pointer isn't captured yet.
|
||
event.x //= self.magnification
|
||
event.y //= self.magnification
|
||
|
||
self.post_message(self.ToolStart(event))
|
||
self.pointer_active = True
|
||
self.capture_mouse(True)
|
||
|
||
def fix_mouse_event(self, event: events.MouseEvent) -> None:
|
||
# Hack to fix mouse coordinates, not needed for mouse down,
|
||
# or while the mouse is up.
|
||
# This seems like a bug.
|
||
# I think it's due to coordinates being calculated differently during mouse capture.
|
||
if self.pointer_active:
|
||
assert isinstance(self.parent, Widget)
|
||
event.x += int(self.parent.scroll_x)
|
||
event.y += int(self.parent.scroll_y)
|
||
|
||
def on_mouse_move(self, event: events.MouseMove) -> None:
|
||
self.fix_mouse_event(event)
|
||
event.x //= self.magnification
|
||
event.y //= self.magnification
|
||
event.delta_x //= self.magnification
|
||
event.delta_y //= self.magnification
|
||
|
||
if self.pointer_active:
|
||
self.post_message(self.ToolUpdate(event))
|
||
else:
|
||
self.post_message(self.ToolPreviewUpdate(event))
|
||
|
||
def on_mouse_up(self, event: events.MouseUp) -> None:
|
||
self.fix_mouse_event(event)
|
||
event.x //= self.magnification
|
||
event.y //= self.magnification
|
||
|
||
self.pointer_active = False
|
||
self.capture_mouse(False)
|
||
self.post_message(self.ToolStop(event))
|
||
|
||
def on_leave(self, event: events.Leave) -> None:
|
||
if not self.pointer_active:
|
||
self.post_message(self.ToolPreviewStop())
|
||
|
||
def get_content_width(self, container: Size, viewport: Size) -> int:
|
||
return self.image.width * self.magnification
|
||
|
||
def get_content_height(self, container: Size, viewport: Size, width: int) -> int:
|
||
return self.image.height * self.magnification
|
||
|
||
def render_line(self, y: int) -> Strip:
|
||
"""Render a line of the widget. y is relative to the top of the widget."""
|
||
assert self.image is not None
|
||
# self.size.width/height already is multiplied by self.magnification.
|
||
if y >= self.size.height:
|
||
return Strip.blank(self.size.width)
|
||
segments: List[Segment] = []
|
||
sel = self.image.selection
|
||
|
||
# Avoiding "possibly unbound" errors.
|
||
magnifier_preview_region = None
|
||
inner_magnifier_preview_region = None
|
||
select_preview_region = None
|
||
inner_select_preview_region = None
|
||
selection_region = None
|
||
inner_selection_region = None
|
||
|
||
if self.magnifier_preview_region:
|
||
magnifier_preview_region = scale_region(self.magnifier_preview_region, self.magnification)
|
||
inner_magnifier_preview_region = magnifier_preview_region.shrink((1, 1, 1, 1))
|
||
if self.select_preview_region:
|
||
select_preview_region = scale_region(self.select_preview_region, self.magnification)
|
||
inner_select_preview_region = select_preview_region.shrink((1, 1, 1, 1))
|
||
if sel:
|
||
selection_region = scale_region(sel.region, self.magnification)
|
||
inner_selection_region = selection_region.shrink((1, 1, 1, 1))
|
||
for x in range(self.size.width):
|
||
cell_x = x // self.magnification
|
||
cell_y = y // self.magnification
|
||
try:
|
||
if sel and sel.contained_image and sel.region.contains(cell_x, cell_y) and (sel.mask is None or sel.mask[cell_y - sel.region.y][cell_x - sel.region.x]):
|
||
bg = sel.contained_image.bg[cell_y - sel.region.y][cell_x - sel.region.x]
|
||
fg = sel.contained_image.fg[cell_y - sel.region.y][cell_x - sel.region.x]
|
||
ch = sel.contained_image.ch[cell_y - sel.region.y][cell_x - sel.region.x]
|
||
else:
|
||
bg = self.image.bg[cell_y][cell_x]
|
||
fg = self.image.fg[cell_y][cell_x]
|
||
ch = self.image.ch[cell_y][cell_x]
|
||
except IndexError:
|
||
# This should be easier to debug visually.
|
||
bg = "#555555"
|
||
fg = "#cccccc"
|
||
ch = "?"
|
||
if self.magnification > 1:
|
||
ch = self.big_ch(ch, x % self.magnification, y % self.magnification)
|
||
style = Style.parse(fg+" on "+bg)
|
||
assert style.color is not None
|
||
assert style.bgcolor is not None
|
||
# def offset_to_text_index(offset) -> int:
|
||
# # return offset.y * sel.region.width + offset.x
|
||
# # return offset.y * self.image.width + offset.x
|
||
if (
|
||
self.magnifier_preview_region and magnifier_preview_region.contains(x, y) and not inner_magnifier_preview_region.contains(x, y) or
|
||
self.select_preview_region and select_preview_region.contains(x, y) and not inner_select_preview_region.contains(x, y) or
|
||
sel and selection_region.contains(x, y) and not inner_selection_region.contains(x, y) or
|
||
sel and sel.textbox_mode and (
|
||
# offset_to_text_index(sel.text_selection_start) <=
|
||
# offset_to_text_index(Offset(x, y))
|
||
# < offset_to_text_index(sel.text_selection_end)
|
||
# sel.text_selection_start.x <= cell_x - sel.region.x < sel.text_selection_end.x and
|
||
# sel.text_selection_start.y <= cell_y - sel.region.y < sel.text_selection_end.y
|
||
sel.text_selection_start.x == cell_x - sel.region.x and
|
||
sel.text_selection_start.y == cell_y - sel.region.y
|
||
)
|
||
):
|
||
# invert the colors
|
||
style = Style.parse(f"rgb({255 - style.color.triplet.red},{255 - style.color.triplet.green},{255 - style.color.triplet.blue}) on rgb({255 - style.bgcolor.triplet.red},{255 - style.bgcolor.triplet.green},{255 - style.bgcolor.triplet.blue})")
|
||
segments.append(Segment(ch, style))
|
||
return Strip(segments, self.size.width)
|
||
|
||
def refresh_scaled_region(self, region: Region) -> None:
|
||
"""Refresh a region of the widget, scaled by the magnification."""
|
||
if self.magnification == 1:
|
||
self.refresh(region)
|
||
return
|
||
# TODO: are these offsets needed? I added them because of a problem which I've fixed
|
||
self.refresh(Region(
|
||
(region.x - 1) * self.magnification,
|
||
(region.y - 1) * self.magnification,
|
||
(region.width + 2) * self.magnification,
|
||
(region.height + 2) * self.magnification,
|
||
))
|
||
|
||
def big_ch(self, ch: str, x: int, y: int) -> str:
|
||
"""Return a character part of a meta-glyph."""
|
||
match ch:
|
||
case " ":
|
||
return " "
|
||
case "█":
|
||
return "█"
|
||
case "▄":
|
||
return "█" if y >= self.magnification // 2 else " "
|
||
case "▀":
|
||
return "█" if y < self.magnification // 2 else " "
|
||
case "▌":
|
||
return "█" if x < self.magnification // 2 else " "
|
||
case "▐":
|
||
return "█" if x >= self.magnification // 2 else " "
|
||
case _: pass
|
||
# Fall back to showing the character for a single cell.
|
||
# if x == 0 and y == 0:
|
||
if x == self.magnification // 2 and y == self.magnification // 2:
|
||
return ch
|
||
else:
|
||
return " "
|
||
|
||
|
||
class PaintApp(App[None]):
|
||
"""MS Paint like image editor in the terminal."""
|
||
|
||
CSS_PATH = "paint.css"
|
||
|
||
# These call action_* methods on the widget.
|
||
# They can have parameters, if need be.
|
||
# https://textual.textualize.io/guide/actions/
|
||
#
|
||
# KEEP IN SYNC with the README.md Usage section, please.
|
||
BINDINGS = [
|
||
# There is a built-in "quit" action, but it will quit without asking to save.
|
||
# It's also bound to Ctrl+C by default, so for now I'll rebind it,
|
||
# but eventually Ctrl+C will become Edit > Copy.
|
||
("ctrl+q", "exit", _("Quit")),
|
||
("meta+q", "exit", _("Quit")),
|
||
("ctrl+c", "exit", _("Quit")),
|
||
("ctrl+s", "save", _("Save")),
|
||
("ctrl+shift+s", "save_as", _("Save As")),
|
||
("ctrl+o", "open", _("Open")),
|
||
("ctrl+n", "new", _("New")),
|
||
# ("ctrl+shift+n", "clear_image", _("Clear Image")),
|
||
("ctrl+t", "toggle_tools_box", _("Toggle Tools Box")),
|
||
("ctrl+w", "toggle_colors_box", _("Toggle Colors Box")),
|
||
("ctrl+z", "undo", _("Undo")),
|
||
# Ctrl+Shift+Z doesn't seem to work on Ubuntu or VS Code terminal
|
||
("ctrl+shift+z", "redo", _("Repeat")),
|
||
("shift+ctrl+z", "redo", _("Repeat")),
|
||
("ctrl+y", "redo", _("Repeat")),
|
||
("f4", "redo", _("Repeat")),
|
||
# TODO: don't delete textbox with delete key
|
||
("delete", "clear_selection", _("Clear Selection")),
|
||
("ctrl+pageup", "normal_size", _("Normal Size")),
|
||
("ctrl+pagedown", "large_size", _("Large Size")),
|
||
# action_toggle_dark is built in to App
|
||
("ctrl+d", "toggle_dark", _("Toggle Dark Mode")),
|
||
# dev helper
|
||
# f5 would be more traditional, but I need something not bound to anything
|
||
# in the context of the terminal in VS Code, and not used by this app, like Ctrl+R, and detectable in the terminal.
|
||
("f2", "reload", _("Reload")),
|
||
]
|
||
|
||
show_tools_box = var(True)
|
||
show_colors_box = var(True)
|
||
selected_tool = var(Tool.pencil)
|
||
selected_bg_color = var(palette[0])
|
||
selected_fg_color = var(palette[len(palette) // 2])
|
||
selected_char = var(" ")
|
||
filename = var(None)
|
||
|
||
# For Open/Save As dialogs
|
||
directory_tree_selected_path: str|None = None
|
||
|
||
# I'm avoiding allowing None for image, to avoid type checking woes.
|
||
image = var(AnsiArtDocument.from_text("Not Loaded"))
|
||
image_initialized = False
|
||
|
||
magnification = var(1)
|
||
return_to_magnification = var(4)
|
||
|
||
undos: List[Action] = []
|
||
redos: List[Action] = []
|
||
# temporary undo state for brush previews
|
||
preview_action: Optional[Action] = None
|
||
# file modification tracking
|
||
saved_undo_count = 0
|
||
|
||
# for shape tools that draw between the mouse down and up points
|
||
# (Line, Rectangle, Ellipse, Rounded Rectangle),
|
||
# Select tool (similarly), and Polygon (to detect double-click)
|
||
mouse_at_start = Offset(0, 0)
|
||
# for Select tool, indicates that the selection is being moved
|
||
# and defines the offset of the selection from the mouse
|
||
selection_drag_offset = Offset(0, 0)
|
||
# for Text tool
|
||
selecting_text = False
|
||
# for Curve, Polygon, or Free-Form Select tools
|
||
tool_points: List[Offset] = []
|
||
# for Polygon tool to detect double-click
|
||
polygon_last_click_time = 0
|
||
|
||
# flag to prevent setting the filename input when initially expanding the directory tree
|
||
expanding_directory_tree = False
|
||
|
||
background_tasks: set[asyncio.Task[None]] = set()
|
||
|
||
TITLE = _("Paint")
|
||
|
||
def watch_filename(self, filename: Optional[str]) -> None:
|
||
"""Called when filename changes."""
|
||
if filename is None:
|
||
self.sub_title = _("Untitled")
|
||
else:
|
||
self.sub_title = os.path.basename(filename)
|
||
|
||
def watch_show_tools_box(self, show_tools_box: bool) -> None:
|
||
"""Called when show_tools_box changes."""
|
||
self.query_one("#tools_box", ToolsBox).display = show_tools_box
|
||
|
||
def watch_show_colors_box(self, show_colors_box: bool) -> None:
|
||
"""Called when show_colors_box changes."""
|
||
self.query_one("#colors_box", ColorsBox).display = show_colors_box
|
||
|
||
def watch_selected_tool(self, old_selected_tool: Tool, selected_tool: Tool) -> None:
|
||
"""Called when selected_tool changes."""
|
||
for button in self.query(".tool_button"):
|
||
assert isinstance(button, Button)
|
||
if selected_tool == self.query_one("ToolsBox", ToolsBox).tool_by_button[button]:
|
||
button.add_class("selected")
|
||
else:
|
||
button.remove_class("selected")
|
||
|
||
def watch_selected_bg_color(self, selected_bg_color: str) -> None:
|
||
"""Called when selected_bg_color changes."""
|
||
self.query_one("#selected_color_char_input", CharInput).styles.background = selected_bg_color
|
||
|
||
def watch_selected_fg_color(self, selected_fg_color: str) -> None:
|
||
"""Called when selected_fg_color changes."""
|
||
self.query_one("#selected_color_char_input", CharInput).styles.color = selected_fg_color
|
||
|
||
def watch_selected_char(self, selected_char: str) -> None:
|
||
"""Called when selected_char changes."""
|
||
self.query_one("#selected_color_char_input", CharInput).value = selected_char
|
||
|
||
def watch_magnification(self, old_magnification: int, magnification: int) -> None:
|
||
"""Called when magnification changes."""
|
||
self.canvas.magnification = magnification
|
||
# TODO: keep the top left corner of the viewport in the same place
|
||
# https://github.com/1j01/jspaint/blob/12a90c6bb9d36f495dc6a07114f9667c82ee5228/src/functions.js#L326-L351
|
||
# This will matter more when large documents don't freeze up the program...
|
||
|
||
def stamp_brush(self, x: int, y: int, affected_region_base: Optional[Region] = None) -> Region:
|
||
brush_diameter = 1
|
||
square = self.selected_tool == Tool.eraser
|
||
if self.selected_tool == Tool.brush or self.selected_tool == Tool.airbrush or self.selected_tool == Tool.eraser:
|
||
brush_diameter = 3
|
||
if brush_diameter == 1:
|
||
self.stamp_char(x, y)
|
||
else:
|
||
# plot points within a circle (or square)
|
||
for i in range(brush_diameter):
|
||
for j in range(brush_diameter):
|
||
if square or (i - brush_diameter // 2) ** 2 + (j - brush_diameter // 2) ** 2 <= (brush_diameter // 2) ** 2:
|
||
self.stamp_char(x + i - brush_diameter // 2, y + j - brush_diameter // 2)
|
||
# expand the affected region to include the brush
|
||
brush_diameter += 2 # safety margin
|
||
affected_region = Region(x - brush_diameter // 2, y - brush_diameter // 2, brush_diameter, brush_diameter)
|
||
if affected_region_base:
|
||
return affected_region_base.union(affected_region)
|
||
else:
|
||
return affected_region
|
||
|
||
def stamp_char(self, x: int, y: int) -> None:
|
||
char = self.selected_char
|
||
bg_color = self.selected_bg_color
|
||
fg_color = self.selected_fg_color
|
||
if self.selected_tool == Tool.eraser:
|
||
char = " "
|
||
bg_color = "#ffffff"
|
||
fg_color = "#000000"
|
||
if self.selected_tool == Tool.airbrush:
|
||
if random() < 0.7:
|
||
return
|
||
if x < self.image.width and y < self.image.height and x >= 0 and y >= 0:
|
||
self.image.ch[y][x] = char
|
||
self.image.bg[y][x] = bg_color
|
||
self.image.fg[y][x] = fg_color
|
||
|
||
def erase_region(self, region: Region, mask: Optional[list[list[bool]]] = None) -> None:
|
||
# Time to go undercover as an eraser. 🥸
|
||
# TODO: just add a parameter to stamp_char.
|
||
# Momentarily masquerading makes me mildly mad.
|
||
original_tool = self.selected_tool
|
||
self.selected_tool = Tool.eraser
|
||
for x in range(region.width):
|
||
for y in range(region.height):
|
||
if mask is None or mask[y][x]:
|
||
self.stamp_char(x + region.x, y + region.y)
|
||
self.selected_tool = original_tool
|
||
|
||
def draw_current_polyline(self) -> Region:
|
||
# TODO: DRY with draw_current_curve/draw_current_polygon
|
||
gen = polyline_walk(self.tool_points)
|
||
affected_region = Region()
|
||
for x, y in gen:
|
||
affected_region = affected_region.union(self.stamp_brush(x, y, affected_region))
|
||
return affected_region
|
||
|
||
def draw_current_polygon(self) -> Region:
|
||
# TODO: DRY with draw_current_curve/draw_current_polyline
|
||
gen = polygon_walk(self.tool_points)
|
||
affected_region = Region()
|
||
for x, y in gen:
|
||
affected_region = affected_region.union(self.stamp_brush(x, y, affected_region))
|
||
return affected_region
|
||
|
||
def draw_current_curve(self) -> Region:
|
||
points = self.tool_points
|
||
if len(points) == 4:
|
||
gen = bezier_curve_walk(
|
||
points[0].x, points[0].y,
|
||
points[2].x, points[2].y,
|
||
points[3].x, points[3].y,
|
||
points[1].x, points[1].y,
|
||
)
|
||
elif len(points) == 3:
|
||
gen = quadratic_curve_walk(
|
||
points[0].x, points[0].y,
|
||
points[2].x, points[2].y,
|
||
points[1].x, points[1].y,
|
||
)
|
||
elif len(points) == 2:
|
||
gen = bresenham_walk(
|
||
points[0].x, points[0].y,
|
||
points[1].x, points[1].y,
|
||
)
|
||
else:
|
||
gen = points
|
||
affected_region = Region()
|
||
for x, y in gen:
|
||
affected_region = affected_region.union(self.stamp_brush(x, y, affected_region))
|
||
return affected_region
|
||
|
||
def action_undo(self) -> None:
|
||
self.meld_selection()
|
||
if len(self.undos) > 0:
|
||
self.cancel_preview()
|
||
action = self.undos.pop()
|
||
redo_action = Action(_("Undo") + " " + action.name, self.image, action.region)
|
||
action.undo(self.image)
|
||
self.redos.append(redo_action)
|
||
self.canvas.refresh(layout=True)
|
||
|
||
def action_redo(self) -> None:
|
||
self.meld_selection()
|
||
if len(self.redos) > 0:
|
||
self.cancel_preview()
|
||
action = self.redos.pop()
|
||
undo_action = Action(_("Undo") + " " + action.name, self.image, action.region)
|
||
action.undo(self.image)
|
||
self.undos.append(undo_action)
|
||
self.canvas.refresh(layout=True)
|
||
|
||
def close_windows(self, selector: str) -> None:
|
||
"""Close all windows matching the CSS selector."""
|
||
for window in self.query(selector).nodes:
|
||
assert isinstance(window, Window), f"Expected a Window for query '{selector}', but got {window.css_identifier}"
|
||
window.close()
|
||
|
||
def action_save(self) -> None:
|
||
"""Start the save action, but don't wait for the Save As dialog to close if it's a new file."""
|
||
task = asyncio.create_task(self.save())
|
||
self.background_tasks.add(task)
|
||
task.add_done_callback(self.background_tasks.discard)
|
||
|
||
async def save(self, from_save_as: bool = False) -> None:
|
||
"""Save the image to a file."""
|
||
self.cancel_preview()
|
||
dialog_title = _("Save As") if from_save_as else _("Save")
|
||
if self.filename:
|
||
try:
|
||
ansi = self.image.get_ansi()
|
||
with open(self.filename, "w") as f:
|
||
f.write(ansi)
|
||
self.saved_undo_count = len(self.undos)
|
||
except PermissionError:
|
||
self.warning_message_box(dialog_title, _("Access denied."), "ok")
|
||
except FileNotFoundError:
|
||
self.warning_message_box(dialog_title, _("%1 contains an invalid path.").replace("%1", self.filename), "ok")
|
||
except OSError as e:
|
||
self.warning_message_box(dialog_title, _("Failed to save document.") + "\n\n" + str(e), "ok")
|
||
except Exception as e:
|
||
self.warning_message_box(dialog_title, _("An unexpected error occurred while writing %1.").replace("%1", self.filename) + "\n\n" + str(e), "ok")
|
||
else:
|
||
await self.save_as()
|
||
|
||
def action_save_as(self) -> None:
|
||
"""Show the save as dialog, without waiting for it to close."""
|
||
# Action must not await the dialog closing,
|
||
# or else you'll never see the dialog in the first place!
|
||
task = asyncio.create_task(self.save_as())
|
||
self.background_tasks.add(task)
|
||
task.add_done_callback(self.background_tasks.discard)
|
||
|
||
async def save_as(self) -> None:
|
||
"""Save the image as a new file."""
|
||
self.close_windows("#save_as_dialog, #open_dialog")
|
||
|
||
saved_future: asyncio.Future[None] = asyncio.Future()
|
||
|
||
def handle_button(button: Button) -> None:
|
||
if not button.has_class("save"):
|
||
window.close()
|
||
return
|
||
name = self.query_one("#save_as_dialog .filename_input", Input).value
|
||
if not name:
|
||
return
|
||
if self.directory_tree_selected_path:
|
||
name = os.path.join(self.directory_tree_selected_path, name)
|
||
def on_save_confirmed():
|
||
async def async_on_save_confirmed():
|
||
self.filename = name
|
||
await self.save(from_save_as=True)
|
||
window.close()
|
||
saved_future.set_result(None)
|
||
# https://textual.textualize.io/blog/2023/02/11/the-heisenbug-lurking-in-your-async-code/
|
||
task = asyncio.create_task(async_on_save_confirmed())
|
||
self.background_tasks.add(task)
|
||
task.add_done_callback(self.background_tasks.discard)
|
||
if os.path.exists(name):
|
||
self.confirm_overwrite(name, on_save_confirmed)
|
||
else:
|
||
on_save_confirmed()
|
||
|
||
window = DialogWindow(
|
||
id="save_as_dialog",
|
||
classes="file_dialog_window",
|
||
title=_("Save As"),
|
||
handle_button=handle_button,
|
||
)
|
||
filename: str = os.path.basename(self.filename) if self.filename else _("Untitled")
|
||
window.content.mount(
|
||
EnhancedDirectoryTree(id="save_as_dialog_directory_tree", path="/"),
|
||
Input(classes="filename_input", placeholder=_("Filename"), value=filename),
|
||
Button(_("Save"), classes="save submit", variant="primary"),
|
||
Button(_("Cancel"), classes="cancel"),
|
||
)
|
||
self.mount(window)
|
||
self.expand_directory_tree(window.content.query_one("#save_as_dialog_directory_tree", EnhancedDirectoryTree))
|
||
await saved_future
|
||
|
||
def expand_directory_tree(self, tree: EnhancedDirectoryTree) -> None:
|
||
"""Expand the directory tree to the target directory, either the folder of the open file or the current working directory."""
|
||
self.expanding_directory_tree = True
|
||
target_dir = (self.filename or os.getcwd()).rstrip(os.path.sep)
|
||
tree.expand_to_path(target_dir)
|
||
# There are currently some timers in expand_to_path.
|
||
# In particular, it waits before selecting the target node,
|
||
# and this flag is for avoiding responding to that.
|
||
def done_expanding():
|
||
self.expanding_directory_tree = False
|
||
self.set_timer(0.1, done_expanding)
|
||
|
||
def confirm_overwrite(self, filename: str, callback: Callable[[], None]) -> None:
|
||
message = _("%1 already exists.\nDo you want to replace it?").replace("%1", filename)
|
||
def handle_button(button: Button) -> None:
|
||
if not button.has_class("yes"):
|
||
return
|
||
callback()
|
||
self.warning_message_box(_("Save As"), Static(message, markup=False), "yes/no", handle_button)
|
||
|
||
def prompt_save_changes(self, filename: str, callback: Callable[[], None]) -> None:
|
||
filename = os.path.basename(filename)
|
||
message = "Save changes to " + filename + "?"
|
||
def handle_button(button: Button) -> None:
|
||
if not button.has_class("yes") and not button.has_class("no"):
|
||
return
|
||
async def async_handle_button(button: Button):
|
||
if button.has_class("yes"):
|
||
await self.save()
|
||
callback()
|
||
# https://textual.textualize.io/blog/2023/02/11/the-heisenbug-lurking-in-your-async-code/
|
||
task = asyncio.create_task(async_handle_button(button))
|
||
self.background_tasks.add(task)
|
||
task.add_done_callback(self.background_tasks.discard)
|
||
|
||
self.warning_message_box(_("Paint"), Static(message, markup=False), "yes/no/cancel", handle_button)
|
||
|
||
def is_document_modified(self) -> bool:
|
||
return len(self.undos) != self.saved_undo_count
|
||
|
||
def action_exit(self) -> None:
|
||
if self.is_document_modified():
|
||
self.prompt_save_changes(self.filename or _("Untitled"), self.exit)
|
||
else:
|
||
self.exit()
|
||
|
||
def action_reload(self) -> None:
|
||
if self.is_document_modified():
|
||
self.prompt_save_changes(self.filename or _("Untitled"), restart_program)
|
||
else:
|
||
restart_program()
|
||
|
||
def warning_message_box(self,
|
||
title: str,
|
||
message_widget: Widget|str,
|
||
button_types: str = "ok",
|
||
callback: Callable[[Button], None]|None = None,
|
||
) -> None:
|
||
"""Show a warning message box with the given title, message, and buttons."""
|
||
self.close_windows("#message_box")
|
||
|
||
self.bell()
|
||
|
||
def handle_button(button: Button) -> None:
|
||
# TODO: this is not different or useful enough from DialogWindow's
|
||
# handle_button to justify
|
||
# It's a difference in name, and an automatic close
|
||
if callback:
|
||
callback(button)
|
||
window.close()
|
||
window = MessageBox(
|
||
id="message_box",
|
||
title=title,
|
||
icon_widget=get_warning_icon(),
|
||
message_widget=message_widget,
|
||
button_types=button_types,
|
||
handle_button=handle_button,
|
||
)
|
||
self.mount(window)
|
||
|
||
def action_open(self) -> None:
|
||
"""Show dialog to open an image from a file."""
|
||
|
||
def handle_button(button: Button) -> None:
|
||
if not button.has_class("open"):
|
||
window.close()
|
||
return
|
||
filename = window.content.query_one("#open_dialog .filename_input", Input).value
|
||
if not filename:
|
||
return
|
||
if self.directory_tree_selected_path:
|
||
filename = os.path.join(self.directory_tree_selected_path, filename)
|
||
try:
|
||
# Note that os.path.
|
||
# samefile can raise FileNotFoundError
|
||
if self.filename and os.path.samefile(filename, self.filename):
|
||
window.close()
|
||
return
|
||
with open(filename, "r") as f:
|
||
content = f.read() # f is out of scope in go_ahead()
|
||
def go_ahead():
|
||
try:
|
||
new_image = AnsiArtDocument.from_text(content)
|
||
except Exception as e:
|
||
# "This is not a valid bitmap file, or its format is not currently supported."
|
||
# string from MS Paint doesn't apply well here,
|
||
# at least not until we support bitmap files.
|
||
self.warning_message_box(_("Open"), Static(_("Paint cannot open this file.") + "\n\n" + str(e)), "ok")
|
||
return
|
||
self.action_new(force=True)
|
||
self.canvas.image = self.image = new_image
|
||
self.canvas.refresh(layout=True)
|
||
self.filename = filename
|
||
window.close()
|
||
if self.is_document_modified():
|
||
self.prompt_save_changes(self.filename or _("Untitled"), go_ahead)
|
||
else:
|
||
go_ahead()
|
||
except FileNotFoundError:
|
||
self.warning_message_box(_("Open"), Static(_("File not found.") + "\n" + _("Please verify that the correct path and file name are given.")), "ok")
|
||
except IsADirectoryError:
|
||
self.warning_message_box(_("Open"), Static(_("Invalid file.")), "ok")
|
||
except PermissionError:
|
||
self.warning_message_box(_("Open"), Static(_("Access denied.")), "ok")
|
||
except Exception as e:
|
||
self.warning_message_box(_("Open"), Static(_("An unexpected error occurred while reading %1.").replace("%1", filename) + "\n\n" + str(e)), "ok")
|
||
|
||
self.close_windows("#save_as_dialog, #open_dialog")
|
||
window = DialogWindow(
|
||
id="open_dialog",
|
||
classes="file_dialog_window",
|
||
title=_("Open"),
|
||
handle_button=handle_button,
|
||
)
|
||
window.content.mount(
|
||
EnhancedDirectoryTree(id="open_dialog_directory_tree", path="/"),
|
||
Input(classes="filename_input", placeholder=_("Filename")),
|
||
Button(_("Open"), classes="open submit", variant="primary"),
|
||
Button(_("Cancel"), classes="cancel"),
|
||
)
|
||
self.mount(window)
|
||
self.expand_directory_tree(window.content.query_one("#open_dialog_directory_tree", EnhancedDirectoryTree))
|
||
|
||
def action_new(self, *, force: bool = False) -> None:
|
||
"""Create a new image."""
|
||
if self.is_document_modified() and not force:
|
||
def go_ahead():
|
||
# Cancel doesn't call this callback.
|
||
# Yes or No has been selected.
|
||
# If Yes, a save dialog should already have been shown,
|
||
# or the open file saved.
|
||
# Go ahead and create a new image.
|
||
self.action_new(force=True)
|
||
self.prompt_save_changes(self.filename or _("Untitled"), go_ahead)
|
||
return
|
||
self.image = AnsiArtDocument(80, 24)
|
||
self.canvas.image = self.image
|
||
self.canvas.refresh(layout=True)
|
||
self.filename = None
|
||
self.saved_undo_count = 0
|
||
self.undos = []
|
||
self.redos = []
|
||
self.preview_action = None
|
||
# Following MS Paint's lead and resetting the color (but not the tool.)
|
||
# It probably has to do with color modes.
|
||
self.selected_bg_color = palette[0]
|
||
self.selected_fg_color = palette[len(palette) // 2]
|
||
self.selected_char = " "
|
||
|
||
def action_open_character_selector(self) -> None:
|
||
"""Show dialog to select a character."""
|
||
self.close_windows("#character_selector_dialog")
|
||
def handle_selected_character(character: str) -> None:
|
||
self.selected_char = character
|
||
window.close()
|
||
window = CharacterSelectorDialogWindow(
|
||
id="character_selector_dialog",
|
||
handle_selected_character=handle_selected_character,
|
||
selected_character=self.selected_char,
|
||
title=_("Choose Character"),
|
||
)
|
||
self.mount(window)
|
||
|
||
def action_print_preview(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_page_setup(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_print(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_send(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_set_as_wallpaper_tiled(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_set_as_wallpaper_centered(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_recent_file(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_cut(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_copy(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_paste(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_select_all(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_copy_to(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_paste_from(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_toggle_status_bar(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_text_toolbar(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_normal_size(self) -> None:
|
||
self.magnification = 1
|
||
def action_large_size(self) -> None:
|
||
self.magnification = 4
|
||
def action_custom_zoom(self) -> None:
|
||
self.close_windows("#zoom_dialog")
|
||
def handle_button(button: Button) -> None:
|
||
if button.has_class("ok"):
|
||
min_zoom = 1
|
||
max_zoom = 16
|
||
try:
|
||
n = int(window.content.query_one("#zoom_input", Input).value)
|
||
if n < min_zoom or n > max_zoom:
|
||
raise ValueError
|
||
self.magnification = n
|
||
window.close()
|
||
except ValueError:
|
||
self.warning_message_box(_("Zoom"), _("Please enter an integer between %1 and %2.", str(min_zoom), str(max_zoom)), "ok")
|
||
else:
|
||
window.close()
|
||
window = DialogWindow(
|
||
id="zoom_dialog",
|
||
title=_("Custom Zoom"),
|
||
handle_button=handle_button,
|
||
)
|
||
window.content.mount(
|
||
Input(id="zoom_input", value=str(self.magnification), placeholder=_("Zoom")),
|
||
# Vertical(
|
||
# Horizontal(
|
||
# Static(_("Zoom to")),
|
||
# Input(id="zoom_input", value=str(self.magnification)),
|
||
# ),
|
||
# Horizontal(
|
||
# Static(_("Current zoom:")),
|
||
# Static(str(self.magnification)),
|
||
# ),
|
||
# ),
|
||
# Horizontal(
|
||
Button(_("OK"), classes="ok submit", variant="primary"),
|
||
Button(_("Cancel"), classes="cancel"),
|
||
# classes="buttons",
|
||
# )
|
||
)
|
||
self.mount(window)
|
||
def action_show_grid(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_show_thumbnail(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_view_bitmap(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_flip_rotate(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_stretch_skew(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_invert_colors(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_attributes(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_clear_image(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_draw_opaque(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
def action_edit_colors(self) -> None:
|
||
self.warning_message_box(_("Paint"), "Not implemented.", "ok")
|
||
|
||
def action_help_topics(self) -> None:
|
||
self.close_windows("#help_dialog")
|
||
window = DialogWindow(
|
||
id="help_dialog",
|
||
title=_("Help"), # _("Help Topics"),
|
||
handle_button=lambda button: window.close(),
|
||
)
|
||
help_text = parser.format_usage()
|
||
window.content.mount(Static(help_text, classes="help_text"))
|
||
window.content.mount(Button(_("OK"), classes="ok submit"))
|
||
self.mount(window)
|
||
|
||
def action_about_paint(self) -> None:
|
||
"""Show the About Paint dialog."""
|
||
self.close_windows("#about_paint_dialog")
|
||
window = DialogWindow(
|
||
id="about_paint_dialog",
|
||
title=_("About Paint"),
|
||
handle_button=lambda button: window.close(),
|
||
)
|
||
window.content.mount(Static("""🎨 [b]Textual Paint[/b]
|
||
|
||
[i]MS Paint in your terminal.[/i]
|
||
|
||
[b]Version:[/b] 0.1.0
|
||
[b]Author:[/b] [link=https://isaiahodhner.io/]Isaiah Odhner[/link]
|
||
[b]License:[/b] [link=https://github.com/1j01/textual-paint/blob/main/LICENSE.txt]MIT[/link]
|
||
[b]Source Code:[/b] [link=https://github.com/1j01/textual-paint]github.com/1j01/textual-paint[/link]
|
||
"""))
|
||
window.content.mount(Button(_("OK"), classes="ok submit"))
|
||
self.mount(window)
|
||
|
||
def compose(self) -> ComposeResult:
|
||
"""Add our widgets."""
|
||
yield Header()
|
||
with Container(id="paint"):
|
||
yield MenuBar([
|
||
MenuItem(_("&File"), submenu=Menu([
|
||
MenuItem(_("&New\tCtrl+N"), self.action_new, 57600),
|
||
MenuItem(_("&Open...\tCtrl+O"), self.action_open, 57601),
|
||
MenuItem(_("&Save\tCtrl+S"), self.action_save, 57603),
|
||
MenuItem(_("Save &As..."), self.action_save_as, 57604),
|
||
Separator(),
|
||
MenuItem(_("Print Pre&view"), self.action_print_preview, 57609, grayed=True),
|
||
MenuItem(_("Page Se&tup..."), self.action_page_setup, 57605, grayed=True),
|
||
MenuItem(_("&Print...\tCtrl+P"), self.action_print, 57607, grayed=True),
|
||
Separator(),
|
||
MenuItem(_("S&end..."), self.action_send, 37662, grayed=True),
|
||
Separator(),
|
||
MenuItem(_("Set As &Wallpaper (Tiled)"), self.action_set_as_wallpaper_tiled, 57677, grayed=True),
|
||
MenuItem(_("Set As Wa&llpaper (Centered)"), self.action_set_as_wallpaper_centered, 57675, grayed=True),
|
||
Separator(),
|
||
MenuItem(_("Recent File"), self.action_recent_file, 57616, grayed=True),
|
||
Separator(),
|
||
# MenuItem(_("E&xit\tAlt+F4"), self.action_exit, 57665),
|
||
MenuItem(_("E&xit\tCtrl+Q"), self.action_exit, 57665),
|
||
])),
|
||
MenuItem(_("&Edit"), submenu=Menu([
|
||
MenuItem(_("&Undo\tCtrl+Z"), self.action_undo, 57643),
|
||
MenuItem(_("&Repeat\tF4"), self.action_redo, 57644),
|
||
Separator(),
|
||
MenuItem(_("Cu&t\tCtrl+X"), self.action_cut, 57635, grayed=True),
|
||
MenuItem(_("&Copy\tCtrl+C"), self.action_copy, 57634, grayed=True),
|
||
MenuItem(_("&Paste\tCtrl+V"), self.action_paste, 57637, grayed=True),
|
||
MenuItem(_("C&lear Selection\tDel"), self.action_clear_selection, 57632),
|
||
MenuItem(_("Select &All\tCtrl+A"), self.action_select_all, 57642, grayed=True),
|
||
Separator(),
|
||
MenuItem(_("C&opy To..."), self.action_copy_to, 37663, grayed=True),
|
||
MenuItem(_("Paste &From..."), self.action_paste_from, 37664, grayed=True),
|
||
])),
|
||
MenuItem(_("&View"), submenu=Menu([
|
||
MenuItem(_("&Tool Box\tCtrl+T"), self.action_toggle_tools_box, 59415),
|
||
MenuItem(_("&Color Box\tCtrl+L"), self.action_toggle_colors_box, 59416),
|
||
MenuItem(_("&Status Bar"), self.action_toggle_status_bar, 59393, grayed=True),
|
||
MenuItem(_("T&ext Toolbar"), self.action_text_toolbar, 37678, grayed=True),
|
||
Separator(),
|
||
MenuItem(_("&Zoom"), submenu=Menu([
|
||
MenuItem(_("&Normal Size\tCtrl+PgUp"), self.action_normal_size, 37670),
|
||
MenuItem(_("&Large Size\tCtrl+PgDn"), self.action_large_size, 37671),
|
||
MenuItem(_("C&ustom..."), self.action_custom_zoom, 37672),
|
||
Separator(),
|
||
MenuItem(_("Show &Grid\tCtrl+G"), self.action_show_grid, 37677, grayed=True),
|
||
MenuItem(_("Show T&humbnail"), self.action_show_thumbnail, 37676, grayed=True),
|
||
])),
|
||
MenuItem(_("&View Bitmap\tCtrl+F"), self.action_view_bitmap, 37673, grayed=True),
|
||
])),
|
||
MenuItem(_("&Image"), submenu=Menu([
|
||
MenuItem(_("&Flip/Rotate...\tCtrl+R"), self.action_flip_rotate, 37680, grayed=True),
|
||
MenuItem(_("&Stretch/Skew...\tCtrl+W"), self.action_stretch_skew, 37681, grayed=True),
|
||
MenuItem(_("&Invert Colors\tCtrl+I"), self.action_invert_colors, 37682, grayed=True),
|
||
MenuItem(_("&Attributes...\tCtrl+E"), self.action_attributes, 37683, grayed=True),
|
||
MenuItem(_("&Clear Image\tCtrl+Shft+N"), self.action_clear_image, 37684, grayed=True),
|
||
MenuItem(_("&Draw Opaque"), self.action_draw_opaque, 6868, grayed=True),
|
||
])),
|
||
MenuItem(_("&Colors"), submenu=Menu([
|
||
MenuItem(_("&Edit Colors..."), self.action_edit_colors, 6869, grayed=True),
|
||
])),
|
||
MenuItem(_("&Help"), submenu=Menu([
|
||
MenuItem(_("&Help Topics"), self.action_help_topics, 57670),
|
||
Separator(),
|
||
MenuItem(_("&About Paint"), self.action_about_paint, 57664),
|
||
])),
|
||
])
|
||
yield Container(
|
||
ToolsBox(id="tools_box"),
|
||
Container(
|
||
Canvas(id="canvas"),
|
||
id="editing_area",
|
||
),
|
||
id="main_horizontal_split",
|
||
)
|
||
yield ColorsBox(id="colors_box")
|
||
|
||
def on_mount(self) -> None:
|
||
"""Called when the app is mounted."""
|
||
# Image can be set from the outside, via CLI
|
||
if not self.image_initialized:
|
||
self.image = AnsiArtDocument(80, 24)
|
||
self.image_initialized = True
|
||
self.canvas = self.query_one("#canvas", Canvas)
|
||
self.canvas.image = self.image
|
||
self.editing_area = self.query_one("#editing_area", Container)
|
||
|
||
def pick_color(self, x: int, y: int) -> None:
|
||
"""Select a color from the image."""
|
||
self.selected_bg_color = self.image.bg[y][x]
|
||
self.selected_fg_color = self.image.fg[y][x]
|
||
self.selected_char = self.image.ch[y][x]
|
||
|
||
def get_prospective_magnification(self) -> int:
|
||
"""Returns the magnification result on click with the Magnifier tool."""
|
||
return self.return_to_magnification if self.magnification == 1 else 1
|
||
|
||
def magnifier_click(self, x: int, y: int) -> None:
|
||
"""Zooms in or out on the image."""
|
||
|
||
prev_magnification = self.magnification
|
||
prospective_magnification = self.get_prospective_magnification()
|
||
|
||
# TODO: fix flickering.
|
||
# The canvas resize and scroll each cause a repaint.
|
||
# I tried using a batch_update, but it prevented the layout recalculation
|
||
# needed for the scroll to work correctly.
|
||
# with self.batch_update():
|
||
self.magnification = prospective_magnification
|
||
self.canvas.magnification = self.magnification
|
||
|
||
if self.magnification > prev_magnification:
|
||
w = self.editing_area.size.width / self.magnification
|
||
h = self.editing_area.size.height / self.magnification
|
||
self.editing_area.scroll_to(
|
||
(x - w / 2) * self.magnification / prev_magnification,
|
||
(y - h / 2) * self.magnification / prev_magnification,
|
||
animate=False,
|
||
)
|
||
# `scroll_to` uses `call_after_refresh`.
|
||
# `_scroll_to` is the same thing but without call_after_refresh.
|
||
# But it doesn't work correctly, because the layout isn't updated yet.
|
||
# And if I call:
|
||
# self.screen._refresh_layout()
|
||
# beforehand, it's back to the flickering.
|
||
# I also tried calling:
|
||
# self.editing_area.refresh(layout=True, repaint=False)
|
||
# But it's back to the incorrect scroll position.
|
||
# self.editing_area._scroll_to(
|
||
# (x - w / 2) * self.magnification / prev_magnification,
|
||
# (y - h / 2) * self.magnification / prev_magnification,
|
||
# animate=False,
|
||
# )
|
||
|
||
|
||
def on_canvas_tool_start(self, event: Canvas.ToolStart) -> None:
|
||
"""Called when the user starts drawing on the canvas."""
|
||
event.stop()
|
||
self.cancel_preview()
|
||
|
||
if self.selected_tool == Tool.pick_color:
|
||
self.pick_color(event.mouse_down_event.x, event.mouse_down_event.y)
|
||
return
|
||
|
||
if self.selected_tool == Tool.magnifier:
|
||
self.magnifier_click(event.mouse_down_event.x, event.mouse_down_event.y)
|
||
return
|
||
|
||
# TODO: use Offset() instead of tuple
|
||
# and I would say use event.offset, but I'm dynamically
|
||
# modifying x/y in fix_mouse_event so I need to use those coords for now,
|
||
# unless there's some getter/setter magic behind the scenes.
|
||
self.mouse_at_start = Offset(event.mouse_down_event.x, event.mouse_down_event.y)
|
||
|
||
if self.selected_tool in [Tool.curve, Tool.polygon]:
|
||
self.tool_points.append(Offset(event.mouse_down_event.x, event.mouse_down_event.y))
|
||
if self.selected_tool == Tool.curve:
|
||
self.make_preview(self.draw_current_curve)
|
||
else:
|
||
self.make_preview(self.draw_current_polyline) # polyline until finished
|
||
return
|
||
|
||
if self.selected_tool == Tool.free_form_select:
|
||
self.tool_points = [Offset(event.mouse_down_event.x, event.mouse_down_event.y)]
|
||
|
||
if self.selected_tool in [Tool.select, Tool.free_form_select, Tool.text]:
|
||
sel = self.image.selection
|
||
if sel and sel.region.contains_point(self.mouse_at_start):
|
||
if self.selected_tool == Tool.text:
|
||
# Place cursor at mouse position
|
||
sel.text_selection_start = Offset(*self.mouse_at_start) - sel.region.offset
|
||
sel.text_selection_end = Offset(*self.mouse_at_start) - sel.region.offset
|
||
self.canvas.refresh_scaled_region(sel.region)
|
||
self.selecting_text = True
|
||
return
|
||
# Start dragging the selection.
|
||
self.selection_drag_offset = Offset(
|
||
sel.region.x - self.mouse_at_start.x,
|
||
sel.region.y - self.mouse_at_start.y,
|
||
)
|
||
if sel.contained_image:
|
||
# Already cut out, don't replace the image data.
|
||
return
|
||
# Cut out the selected part of the image from the document to use as the selection's image data.
|
||
# TODO: DRY with the below action handling
|
||
self.image_at_start = AnsiArtDocument(self.image.width, self.image.height)
|
||
self.image_at_start.copy_region(self.image)
|
||
action = Action(self.selected_tool.get_name(), self.image)
|
||
if len(self.redos) > 0:
|
||
self.redos = []
|
||
self.undos.append(action)
|
||
sel.copy_from_document(self.image)
|
||
self.erase_region(sel.region, sel.mask)
|
||
# TODO: use two regions, for the cut out and the paste in, once melded.
|
||
# I could maybe give Action a sub_action property, and use it for the melding.
|
||
# Or I could make it use a list of regions.
|
||
# But for now, just save the whole image, so this action can
|
||
# simply be updated on meld.
|
||
# affected_region = sel.region
|
||
affected_region = Region(0, 0, self.image.width, self.image.height)
|
||
|
||
# TODO: DRY with the below action handling
|
||
action.region = affected_region
|
||
action.region = action.region.intersection(Region(0, 0, self.image.width, self.image.height))
|
||
action.update(self.image_at_start)
|
||
self.canvas.refresh_scaled_region(affected_region)
|
||
return
|
||
self.meld_selection()
|
||
return
|
||
|
||
self.image_at_start = AnsiArtDocument(self.image.width, self.image.height)
|
||
self.image_at_start.copy_region(self.image)
|
||
if len(self.redos) > 0:
|
||
self.redos = []
|
||
action = Action(self.selected_tool.get_name(), self.image)
|
||
self.undos.append(action)
|
||
|
||
affected_region = None
|
||
if self.selected_tool == Tool.pencil or self.selected_tool == Tool.brush:
|
||
affected_region = self.stamp_brush(event.mouse_down_event.x, event.mouse_down_event.y)
|
||
elif self.selected_tool == Tool.fill:
|
||
affected_region = flood_fill(self.image, event.mouse_down_event.x, event.mouse_down_event.y, self.selected_char, self.selected_fg_color, self.selected_bg_color)
|
||
|
||
if affected_region:
|
||
action.region = affected_region
|
||
action.region = action.region.intersection(Region(0, 0, self.image.width, self.image.height))
|
||
action.update(self.image_at_start)
|
||
self.canvas.refresh_scaled_region(affected_region)
|
||
|
||
def cancel_preview(self) -> None:
|
||
"""Revert the currently previewed action."""
|
||
if self.preview_action:
|
||
self.preview_action.undo(self.image)
|
||
self.canvas.refresh_scaled_region(self.preview_action.region)
|
||
self.preview_action = None
|
||
if self.canvas.magnifier_preview_region:
|
||
region = self.canvas.magnifier_preview_region
|
||
self.canvas.magnifier_preview_region = None
|
||
self.canvas.refresh_scaled_region(region)
|
||
if self.canvas.select_preview_region:
|
||
region = self.canvas.select_preview_region
|
||
self.canvas.select_preview_region = None
|
||
self.canvas.refresh_scaled_region(region)
|
||
|
||
def make_preview(self, draw_proc: Callable[[], Region]):
|
||
self.cancel_preview()
|
||
image_before = AnsiArtDocument(self.image.width, self.image.height)
|
||
image_before.copy_region(self.image)
|
||
affected_region = draw_proc()
|
||
if affected_region:
|
||
self.preview_action = Action(self.selected_tool.get_name(), self.image)
|
||
self.preview_action.region = affected_region.intersection(Region(0, 0, self.image.width, self.image.height))
|
||
self.preview_action.update(image_before)
|
||
self.canvas.refresh_scaled_region(affected_region)
|
||
|
||
def on_canvas_tool_preview_update(self, event: Canvas.ToolPreviewUpdate) -> None:
|
||
"""Called when the user is hovering over the canvas but not drawing yet."""
|
||
event.stop()
|
||
self.cancel_preview()
|
||
|
||
if self.selected_tool in [Tool.brush, Tool.pencil, Tool.eraser, Tool.curve, Tool.polygon]:
|
||
if self.selected_tool == Tool.curve:
|
||
self.make_preview(self.draw_current_curve)
|
||
elif self.selected_tool == Tool.polygon:
|
||
self.make_preview(self.draw_current_polyline) # polyline until finished
|
||
else:
|
||
self.make_preview(lambda: self.stamp_brush(event.mouse_move_event.x, event.mouse_move_event.y))
|
||
elif self.selected_tool == Tool.magnifier:
|
||
prospective_magnification = self.get_prospective_magnification()
|
||
|
||
if prospective_magnification < self.magnification:
|
||
return # hide if clicking would zoom out
|
||
|
||
# prospective viewport size in document coords
|
||
w = self.editing_area.size.width // prospective_magnification
|
||
h = self.editing_area.size.height // prospective_magnification
|
||
|
||
rect_x1 = (event.mouse_move_event.x - w // 2)
|
||
rect_y1 = (event.mouse_move_event.y - h // 2)
|
||
|
||
# try to move rect into bounds without squishing
|
||
rect_x1 = max(0, rect_x1)
|
||
rect_y1 = max(0, rect_y1)
|
||
rect_x1 = min(self.image.width - w, rect_x1)
|
||
rect_y1 = min(self.image.height - h, rect_y1)
|
||
|
||
rect_x2 = rect_x1 + w
|
||
rect_y2 = rect_y1 + h
|
||
|
||
# clamp rect to bounds (with squishing)
|
||
rect_x1 = max(0, rect_x1)
|
||
rect_y1 = max(0, rect_y1)
|
||
rect_x2 = min(self.image.width, rect_x2)
|
||
rect_y2 = min(self.image.height, rect_y2)
|
||
|
||
rect_w = rect_x2 - rect_x1
|
||
rect_h = rect_y2 - rect_y1
|
||
rect_x = rect_x1
|
||
rect_y = rect_y1
|
||
|
||
self.canvas.magnifier_preview_region = Region(rect_x, rect_y, rect_w, rect_h)
|
||
self.canvas.refresh_scaled_region(self.canvas.magnifier_preview_region)
|
||
|
||
def on_canvas_tool_preview_stop(self, event: Canvas.ToolPreviewStop) -> None:
|
||
"""Called when the user stops hovering over the canvas (while previewing, not drawing)."""
|
||
event.stop()
|
||
self.cancel_preview()
|
||
|
||
def get_select_region(self, start: Offset, end: Offset) -> Region:
|
||
# Region.from_corners requires the first point to be the top left,
|
||
# and it doesn't ensure the width and height are non-zero, so it doesn't work here.
|
||
# We want to treat the inputs as cells, not points,
|
||
# so we need to add 1 to the bottom/right.
|
||
x1, y1 = start
|
||
x2, y2 = end
|
||
x1, x2 = min(x1, x2), max(x1, x2)
|
||
y1, y2 = min(y1, y2), max(y1, y2)
|
||
region = Region(x1, y1, x2 - x1 + 1, y2 - y1 + 1)
|
||
# Clamp to the document bounds.
|
||
return region.intersection(Region(0, 0, self.image.width, self.image.height))
|
||
|
||
def meld_selection(self) -> None:
|
||
"""Draw the selection onto the image and dissolve the selection."""
|
||
# I could DRY this by making clear_selection return the Selection
|
||
if self.image.selection:
|
||
region = self.image.selection.region
|
||
self.image.selection.copy_to_document(self.image)
|
||
self.image.selection = None
|
||
self.canvas.refresh_scaled_region(region)
|
||
self.selection_drag_offset = None
|
||
self.selecting_text = False
|
||
|
||
def action_clear_selection(self) -> None:
|
||
"""Delete the selection and its contents."""
|
||
if self.image.selection:
|
||
region = self.image.selection.region
|
||
if not self.image.selection.contained_image:
|
||
# It hasn't been cut out yet, so we need to erase it.
|
||
self.erase_region(region, self.image.selection.mask)
|
||
self.image.selection = None
|
||
self.canvas.refresh_scaled_region(region)
|
||
self.selection_drag_offset = None
|
||
self.selecting_text = False
|
||
|
||
def on_canvas_tool_update(self, event: Canvas.ToolUpdate) -> None:
|
||
"""Called when the user is drawing on the canvas.
|
||
|
||
Several tools do a preview of sorts here, even though it's not the ToolPreviewUpdate event.
|
||
TODO: rename these events to describe when they occur, ascribe less semantics to them.
|
||
"""
|
||
event.stop()
|
||
self.cancel_preview()
|
||
|
||
if self.selected_tool == Tool.pick_color:
|
||
self.pick_color(event.mouse_move_event.x, event.mouse_move_event.y)
|
||
return
|
||
|
||
if self.selected_tool in [Tool.fill, Tool.magnifier]:
|
||
return
|
||
|
||
if self.selected_tool in [Tool.select, Tool.free_form_select, Tool.text]:
|
||
sel = self.image.selection
|
||
if self.selecting_text:
|
||
assert sel is not None, "selecting_text should only be set if there's a selection"
|
||
sel.text_selection_end = Offset(event.mouse_move_event.x, event.mouse_move_event.y) - sel.region.offset
|
||
self.canvas.refresh_scaled_region(sel.region)
|
||
elif self.selection_drag_offset:
|
||
assert sel is not None, "selection_drag_offset should only be set if there's a selection"
|
||
offset = (
|
||
self.selection_drag_offset.x + event.mouse_move_event.x,
|
||
self.selection_drag_offset.y + event.mouse_move_event.y,
|
||
)
|
||
# constrain to have at least one cell in the bounds of the document
|
||
offset = (
|
||
max(1-sel.region.width, min(self.image.width - 1, offset[0])),
|
||
max(1-sel.region.height, min(self.image.height - 1, offset[1])),
|
||
)
|
||
old_region = sel.region
|
||
sel.region = Region.from_offset(offset, sel.region.size)
|
||
combined_region = old_region.union(sel.region)
|
||
self.canvas.refresh_scaled_region(combined_region)
|
||
elif self.selected_tool == Tool.free_form_select:
|
||
self.tool_points.append(Offset(event.mouse_move_event.x, event.mouse_move_event.y))
|
||
# polyline until finished, TODO: invert background, don't use selected color
|
||
self.make_preview(self.draw_current_polyline)
|
||
else:
|
||
self.canvas.select_preview_region = self.get_select_region(self.mouse_at_start, event.mouse_move_event.offset)
|
||
self.canvas.refresh_scaled_region(self.canvas.select_preview_region)
|
||
return
|
||
|
||
if self.selected_tool in [Tool.curve, Tool.polygon]:
|
||
if len(self.tool_points) < 2:
|
||
self.tool_points.append(Offset(event.mouse_move_event.x, event.mouse_move_event.y))
|
||
self.tool_points[-1] = Offset(event.mouse_move_event.x, event.mouse_move_event.y)
|
||
|
||
if self.selected_tool == Tool.curve:
|
||
self.make_preview(self.draw_current_curve)
|
||
elif self.selected_tool == Tool.polygon:
|
||
self.make_preview(self.draw_current_polyline) # polyline until finished
|
||
return
|
||
|
||
if len(self.undos) == 0:
|
||
# Code below wants to update the last action.
|
||
# However, if you you undo while drawing,
|
||
# there may be no last action.
|
||
# FIXME: Ideally we'd stop getting events in this case.
|
||
# This might be buggy if there were multiple undos.
|
||
# It might replace the action instead of doing nothing.
|
||
return
|
||
|
||
mm = event.mouse_move_event
|
||
action = self.undos[-1]
|
||
affected_region = None
|
||
|
||
replace_action = self.selected_tool in [Tool.ellipse, Tool.rectangle, Tool.line, Tool.rounded_rectangle]
|
||
old_action: Optional[Action] = None # avoid "possibly unbound"
|
||
if replace_action:
|
||
old_action = self.undos.pop()
|
||
old_action.undo(self.image)
|
||
action = Action(self.selected_tool.get_name(), self.image, affected_region)
|
||
self.undos.append(action)
|
||
|
||
if self.selected_tool == Tool.pencil or self.selected_tool == Tool.brush or self.selected_tool == Tool.eraser or self.selected_tool == Tool.airbrush:
|
||
for x, y in bresenham_walk(mm.x - mm.delta_x, mm.y - mm.delta_y, mm.x, mm.y):
|
||
affected_region = self.stamp_brush(x, y, affected_region)
|
||
elif self.selected_tool == Tool.line:
|
||
for x, y in bresenham_walk(self.mouse_at_start.x, self.mouse_at_start.y, mm.x, mm.y):
|
||
affected_region = self.stamp_brush(x, y, affected_region)
|
||
elif self.selected_tool == Tool.rectangle:
|
||
for x in range(min(self.mouse_at_start.x, mm.x), max(self.mouse_at_start.x, mm.x) + 1):
|
||
for y in range(min(self.mouse_at_start.y, mm.y), max(self.mouse_at_start.y, mm.y) + 1):
|
||
if x in range(min(self.mouse_at_start.x, mm.x) + 1, max(self.mouse_at_start.x, mm.x)) and y in range(min(self.mouse_at_start.y, mm.y) + 1, max(self.mouse_at_start.y, mm.y)):
|
||
continue
|
||
affected_region = self.stamp_brush(x, y, affected_region)
|
||
elif self.selected_tool == Tool.rounded_rectangle:
|
||
arc_radius = min(2, abs(self.mouse_at_start.x - mm.x) // 2, abs(self.mouse_at_start.y - mm.y) // 2)
|
||
min_x = min(self.mouse_at_start.x, mm.x)
|
||
max_x = max(self.mouse_at_start.x, mm.x)
|
||
min_y = min(self.mouse_at_start.y, mm.y)
|
||
max_y = max(self.mouse_at_start.y, mm.y)
|
||
for x, y in midpoint_ellipse(0, 0, arc_radius, arc_radius):
|
||
if x < 0:
|
||
x = min_x + x + arc_radius
|
||
else:
|
||
x = max_x + x - arc_radius
|
||
if y < 0:
|
||
y = min_y + y + arc_radius
|
||
else:
|
||
y = max_y + y - arc_radius
|
||
affected_region = self.stamp_brush(x, y, affected_region)
|
||
for x in range(min_x + arc_radius, max_x - arc_radius + 1):
|
||
affected_region = self.stamp_brush(x, min_y, affected_region)
|
||
affected_region = self.stamp_brush(x, max_y, affected_region)
|
||
for y in range(min_y + arc_radius, max_y - arc_radius + 1):
|
||
affected_region = self.stamp_brush(min_x, y, affected_region)
|
||
affected_region = self.stamp_brush(max_x, y, affected_region)
|
||
elif self.selected_tool == Tool.ellipse:
|
||
center_x = (self.mouse_at_start.x + mm.x) // 2
|
||
center_y = (self.mouse_at_start.y + mm.y) // 2
|
||
radius_x = abs(self.mouse_at_start.x - mm.x) // 2
|
||
radius_y = abs(self.mouse_at_start.y - mm.y) // 2
|
||
for x, y in midpoint_ellipse(center_x, center_y, radius_x, radius_y):
|
||
affected_region = self.stamp_brush(x, y, affected_region)
|
||
else:
|
||
raise NotImplementedError
|
||
|
||
# Update action region and image data
|
||
if action.region and affected_region:
|
||
action.region = action.region.union(affected_region)
|
||
elif affected_region:
|
||
action.region = affected_region
|
||
if action.region:
|
||
action.region = action.region.intersection(Region(0, 0, self.image.width, self.image.height))
|
||
action.update(self.image_at_start)
|
||
|
||
# Only for refreshing, include replaced action region
|
||
# (The new action is allowed to shrink the region compared to the old one)
|
||
if affected_region:
|
||
if replace_action:
|
||
affected_region = affected_region.union(old_action.region)
|
||
self.canvas.refresh_scaled_region(affected_region)
|
||
|
||
def on_canvas_tool_stop(self, event: Canvas.ToolStop) -> None:
|
||
"""Called when releasing the mouse button after drawing/dragging on the canvas."""
|
||
# Clear the selection preview in case the mouse has moved.
|
||
# (I don't know of any guarantee that it won't.)
|
||
self.cancel_preview()
|
||
|
||
if self.selection_drag_offset:
|
||
# Done dragging selection
|
||
self.selection_drag_offset = None
|
||
return
|
||
if self.selecting_text:
|
||
# Done selecting text
|
||
self.selecting_text = False
|
||
return
|
||
if self.selected_tool in [Tool.select, Tool.free_form_select, Tool.text] and self.mouse_at_start:
|
||
# Finish making a selection
|
||
if self.selected_tool == Tool.free_form_select:
|
||
# Find bounds of the polygon
|
||
min_x = min(p.x for p in self.tool_points)
|
||
max_x = max(p.x for p in self.tool_points)
|
||
min_y = min(p.y for p in self.tool_points)
|
||
max_y = max(p.y for p in self.tool_points)
|
||
select_region = Region(min_x, min_y, max_x - min_x + 1, max_y - min_y + 1)
|
||
select_region = select_region.intersection(Region(0, 0, self.image.width, self.image.height))
|
||
else:
|
||
select_region = self.get_select_region(self.mouse_at_start, event.mouse_up_event.offset)
|
||
if self.image.selection:
|
||
# This shouldn't happen, because it should meld
|
||
# the selection on mouse down.
|
||
self.meld_selection()
|
||
self.image.selection = Selection(select_region)
|
||
self.image.selection.textbox_mode = self.selected_tool == Tool.text
|
||
if self.image.selection.textbox_mode:
|
||
self.image.selection.contained_image = AnsiArtDocument(self.image.selection.region.width, self.image.selection.region.height)
|
||
if self.selected_tool == Tool.free_form_select:
|
||
# Define the mask for the selection using the polygon
|
||
self.image.selection.mask = [[is_inside_polygon(x + select_region.x, y + select_region.y, self.tool_points) for x in range(select_region.width)] for y in range(select_region.height)]
|
||
self.canvas.refresh_scaled_region(select_region)
|
||
elif self.selected_tool == Tool.curve:
|
||
# Maybe finish drawing a curve
|
||
if len(self.tool_points) >= 4:
|
||
# TODO: DRY action handling (undo state creation)!!!
|
||
self.image_at_start = AnsiArtDocument(self.image.width, self.image.height)
|
||
self.image_at_start.copy_region(self.image)
|
||
action = Action(self.selected_tool.get_name(), self.image)
|
||
if len(self.redos) > 0:
|
||
self.redos = []
|
||
self.undos.append(action)
|
||
|
||
affected_region = self.draw_current_curve()
|
||
|
||
action.region = affected_region
|
||
action.region = action.region.intersection(Region(0, 0, self.image.width, self.image.height))
|
||
action.update(self.image_at_start)
|
||
self.canvas.refresh_scaled_region(affected_region)
|
||
|
||
self.tool_points = []
|
||
else:
|
||
# Most likely just drawing the preview we just cancelled.
|
||
self.make_preview(self.draw_current_curve)
|
||
elif self.selected_tool == Tool.polygon:
|
||
# Maybe finish drawing a polygon
|
||
|
||
# Check if the distance between the first and last point is small enough,
|
||
# or if the user double-clicked.
|
||
close_gap_threshold_cells = 2
|
||
double_click_threshold_seconds = 0.5
|
||
double_click_threshold_cells = 2
|
||
time_since_last_click = event.time - self.polygon_last_click_time
|
||
enough_points = len(self.tool_points) >= 3
|
||
closed_gap = (
|
||
abs(self.tool_points[0].x - event.mouse_up_event.x) <= close_gap_threshold_cells and
|
||
abs(self.tool_points[0].y - event.mouse_up_event.y) <= close_gap_threshold_cells
|
||
)
|
||
double_clicked = (
|
||
time_since_last_click < double_click_threshold_seconds and
|
||
abs(self.mouse_at_start.x - event.mouse_up_event.x) <= double_click_threshold_cells and
|
||
abs(self.mouse_at_start.y - event.mouse_up_event.y) <= double_click_threshold_cells
|
||
)
|
||
if enough_points and (closed_gap or double_clicked):
|
||
# Finish drawing the polygon
|
||
# TODO: DRY action handling (undo state creation)!!!
|
||
self.image_at_start = AnsiArtDocument(self.image.width, self.image.height)
|
||
self.image_at_start.copy_region(self.image)
|
||
action = Action(self.selected_tool.get_name(), self.image)
|
||
if len(self.redos) > 0:
|
||
self.redos = []
|
||
self.undos.append(action)
|
||
|
||
affected_region = self.draw_current_polygon()
|
||
|
||
action.region = affected_region
|
||
action.region = action.region.intersection(Region(0, 0, self.image.width, self.image.height))
|
||
action.update(self.image_at_start)
|
||
self.canvas.refresh_scaled_region(affected_region)
|
||
|
||
self.tool_points = []
|
||
else:
|
||
# Most likely just drawing the preview we just cancelled.
|
||
self.make_preview(self.draw_current_polyline) # polyline until finished
|
||
|
||
self.polygon_last_click_time = event.time
|
||
|
||
|
||
|
||
# Not reliably unset, so might as well not rely on it. (See early returns above.)
|
||
# self.mouse_at_start = None
|
||
|
||
def on_key(self, event: events.Key) -> None:
|
||
"""Called when the user presses a key."""
|
||
if self.image.selection and self.image.selection.textbox_mode:
|
||
key = event.key
|
||
assert self.image.selection.contained_image is not None, "Textbox mode should always have contained_image, to edit as text."
|
||
# TODO: delete selected text if any, when typing
|
||
x, y = self.image.selection.text_selection_start
|
||
if key == "enter":
|
||
x = 0
|
||
y += 1
|
||
if y >= self.image.selection.contained_image.height:
|
||
y = self.image.selection.contained_image.height - 1
|
||
elif key == "left":
|
||
x = max(0, x - 1)
|
||
elif key == "right":
|
||
x = min(self.image.selection.contained_image.width - 1, x + 1)
|
||
elif key == "up":
|
||
y = max(0, y - 1)
|
||
elif key == "down":
|
||
y = min(self.image.selection.contained_image.height - 1, y + 1)
|
||
elif key == "backspace":
|
||
x = max(0, x - 1)
|
||
self.image.selection.contained_image.ch[y][x] = " "
|
||
elif key == "delete":
|
||
self.image.selection.contained_image.ch[y][x] = " "
|
||
x = min(self.image.selection.contained_image.width - 1, x + 1)
|
||
elif key == "home":
|
||
x = 0
|
||
elif key == "end":
|
||
x = self.image.selection.contained_image.width - 1
|
||
elif key == "pageup":
|
||
y = 0
|
||
elif key == "pagedown":
|
||
y = self.image.selection.contained_image.height - 1
|
||
elif event.is_printable and event.character: # Redundance for type checker
|
||
# Type a character into the textbox
|
||
self.image.selection.contained_image.ch[y][x] = event.character
|
||
# x = min(self.image.selection.contained_image.width - 1, x + 1)
|
||
x += 1
|
||
if x >= self.image.selection.contained_image.width:
|
||
x = 0
|
||
# y = min(self.image.selection.contained_image.height - 1, y + 1)
|
||
y += 1
|
||
if y >= self.image.selection.contained_image.height:
|
||
y = self.image.selection.contained_image.height - 1
|
||
x = self.image.selection.contained_image.width - 1
|
||
self.image.selection.text_selection_start = Offset(x, y)
|
||
self.image.selection.text_selection_end = Offset(x, y)
|
||
self.canvas.refresh_scaled_region(self.image.selection.region)
|
||
|
||
|
||
def action_toggle_tools_box(self) -> None:
|
||
self.show_tools_box = not self.show_tools_box
|
||
|
||
def action_toggle_colors_box(self) -> None:
|
||
self.show_colors_box = not self.show_colors_box
|
||
|
||
def on_tools_box_tool_selected(self, event: ToolsBox.ToolSelected) -> None:
|
||
"""Called when a tool is selected in the palette."""
|
||
self.selected_tool = event.tool
|
||
self.meld_selection()
|
||
self.tool_points = []
|
||
|
||
def on_char_input_char_selected(self, event: CharInput.CharSelected) -> None:
|
||
"""Called when a character is entered in the character input."""
|
||
self.selected_char = event.char
|
||
|
||
def on_colors_box_color_selected(self, event: ColorsBox.ColorSelected) -> None:
|
||
"""Called when a color well is clicked in the palette."""
|
||
# TODO: a way to select the foreground color
|
||
# if event.fg:
|
||
# self.selected_fg_color = event.color
|
||
# else:
|
||
self.selected_bg_color = event.color
|
||
|
||
def on_tree_node_highlighted(self, event: Tree.NodeHighlighted[DirEntry]) -> None:
|
||
"""
|
||
Called when a file/folder is selected in the DirectoryTree.
|
||
|
||
This message comes from Tree.
|
||
DirectoryTree gives FileSelected but only for files.
|
||
"""
|
||
assert event.node.data
|
||
if event.node.data.is_dir:
|
||
self.directory_tree_selected_path = event.node.data.path
|
||
elif event.node.parent:
|
||
assert event.node.parent.data
|
||
self.directory_tree_selected_path = event.node.parent.data.path
|
||
name = os.path.basename(event.node.data.path)
|
||
if not self.expanding_directory_tree:
|
||
self.query_one(".file_dialog_window .filename_input", Input).value = name
|
||
else:
|
||
self.directory_tree_selected_path = None
|
||
|
||
def on_mouse_down(self, event: events.MouseDown) -> None:
|
||
"""Called when the mouse button gets pressed."""
|
||
|
||
leaf_widget, _ = self.get_widget_at(*event.screen_offset)
|
||
# Deselect if clicking outside the canvas
|
||
if leaf_widget is self.editing_area:
|
||
self.meld_selection()
|
||
|
||
# This is a dev helper to inspect the layout
|
||
# by highlighting the elements under the mouse in different colors, and labeling them on their borders.
|
||
# debug_highlight is a list of tuples of (element, original_color, original_border, original_border_title)
|
||
if not inspect_layout:
|
||
return
|
||
# Trigger only with middle mouse button.
|
||
# This is before the reset, so you have to middle click on the root element to reset.
|
||
# I didn't like it resetting on every click.
|
||
if event.button != 2:
|
||
return
|
||
if hasattr(self, "debug_highlight"):
|
||
for element, original_color, original_border, original_border_title in self.debug_highlight:
|
||
element.styles.background = original_color
|
||
element.styles.border = original_border
|
||
element.border_title = original_border_title
|
||
self.debug_highlight: List[Tuple[Widget, Color, BorderDefinition, Optional[str]]] = []
|
||
# leaf_widget, _ = self.get_widget_at(*event.screen_offset)
|
||
if leaf_widget and leaf_widget is not self.screen:
|
||
for i, widget in enumerate(leaf_widget.ancestors_with_self):
|
||
self.debug_highlight.append((widget, widget.styles.background, widget.styles.border, widget.border_title if hasattr(widget, "border_title") else None)) # type: ignore
|
||
widget.styles.background = Color.from_hsl(i / 10, 1, 0.3)
|
||
if not event.ctrl:
|
||
widget.styles.border = ("round", Color.from_hsl(i / 10, 1, 0.5))
|
||
widget.border_title = widget.css_identifier_styled # type: ignore
|
||
|
||
# `textual run --dev paint.py` will search for a
|
||
# global variable named `app`, and fallback to
|
||
# anything that is an instance of `App`, or
|
||
# a subclass of `App`.
|
||
# Creating the app and parsing arguments must not be within an if __name__ == "__main__" block,
|
||
# since __name__ will be "<run_path>" when running with the textual CLI,
|
||
# and it would create a new app instance, and all arguments would be ignored.
|
||
app = PaintApp()
|
||
|
||
if args.ascii_only_icons:
|
||
ascii_only_icons = True
|
||
if args.inspect_layout:
|
||
inspect_layout = True
|
||
if args.filename:
|
||
# if args.filename == "-" and not sys.stdin.isatty():
|
||
# app.image = AnsiArtDocument.from_text(sys.stdin.read())
|
||
# app.filename = "<stdin>"
|
||
# else:
|
||
with open(args.filename, 'r') as my_file:
|
||
app.image = AnsiArtDocument.from_text(my_file.read())
|
||
app.image_initialized = True
|
||
app.filename = os.path.abspath(args.filename)
|
||
if args.clear_screen:
|
||
os.system("cls||clear")
|
||
|
||
app.dark = args.theme == "dark"
|
||
|
||
if __name__ == "__main__":
|
||
app.run()
|