293 lines
11 KiB
Python
293 lines
11 KiB
Python
# Copyright (C) 2020-2021 by ÿnérant, eichhornchen, nicomarg, charlse
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# SPDX-License-Identifier: GPL-3.0-or-later
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import curses
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import sys
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from typing import Any, Optional, Tuple, Union
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from squirrelbattle.display.texturepack import TexturePack
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from squirrelbattle.game import Game
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from squirrelbattle.tests.screen import FakePad
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class Display:
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x: int
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y: int
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width: int
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height: int
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pad: Any
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_color_pairs = {(curses.COLOR_WHITE, curses.COLOR_BLACK): 0}
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_colors_rgb = {}
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def __init__(self, screen: Any, pack: Optional[TexturePack] = None):
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self.screen = screen
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self.pack = pack or TexturePack.get_pack("ascii")
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def newpad(self, height: int, width: int) -> Union[FakePad, Any]:
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"""
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Overwrites the native curses function of the same name.
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"""
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return curses.newpad(height, width) if self.screen else FakePad()
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def truncate(self, msg: str, height: int, width: int) -> str:
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"""
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Truncates a string into a string adapted to the width and height of
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the screen.
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"""
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height = max(0, height)
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width = max(0, width)
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lines = msg.split("\n")
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lines = lines[:height]
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lines = [line[:width] for line in lines]
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return "\n".join(lines)
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def translate_color(self, color: Union[int, Tuple[int, int, int]]) -> int:
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"""
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Translates a tuple (R, G, B) into a curses color index.
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If we already have a color index, then nothing is processed.
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If this is a tuple, we construct a new color index if non-existing
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and we return this index.
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The values of R, G and B must be between 0 and 1000, and not
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between 0 and 255.
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"""
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if isinstance(color, tuple):
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# The color is a tuple (R, G, B), that is potentially unknown.
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# We translate it into a curses color number.
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if color not in self._colors_rgb:
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# The color does not exist, we create it.
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color_nb = len(self._colors_rgb) + 8
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self.init_color(color_nb, color[0], color[1], color[2])
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self._colors_rgb[color] = color_nb
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color = self._colors_rgb[color]
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return color
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def addstr(self, pad: Any, y: int, x: int, msg: str,
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fg_color: Union[int, Tuple[int, int, int]] = curses.COLOR_WHITE,
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bg_color: Union[int, Tuple[int, int, int]] = curses.COLOR_BLACK,
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*, altcharset: bool = False, blink: bool = False,
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bold: bool = False, dim: bool = False, invis: bool = False,
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italic: bool = False, normal: bool = False,
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protect: bool = False, reverse: bool = False,
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standout: bool = False, underline: bool = False,
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horizontal: bool = False, left: bool = False,
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low: bool = False, right: bool = False, top: bool = False,
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vertical: bool = False, chartext: bool = False) -> None:
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"""
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Displays a message onto the pad.
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If the message is too large, it is truncated vertically and horizontally
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The text can be bold, italic, blinking, ... if the right parameters are
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given. These parameters are translated into curses attributes.
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The foreground and background colors can be given as curses constants
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(curses.COLOR_*), or by giving a tuple (R, G, B) that corresponds to
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the color. R, G, B must be between 0 and 1000, and not 0 and 255.
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"""
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height, width = pad.getmaxyx()
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# Truncate message if it is too large
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msg = self.truncate(msg, height - y, width - x - 1)
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if msg.replace("\n", "") and x >= 0 and y >= 0:
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fg_color = self.translate_color(fg_color)
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bg_color = self.translate_color(bg_color)
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# Get the pair number for the tuple (fg, bg)
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# If it does not exist, create it and give a new unique id.
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if (fg_color, bg_color) in self._color_pairs:
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pair_nb = self._color_pairs[(fg_color, bg_color)]
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else:
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pair_nb = len(self._color_pairs)
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self.init_pair(pair_nb, fg_color, bg_color)
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self._color_pairs[(fg_color, bg_color)] = pair_nb
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# Compute curses attributes from the parameters
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attr = self.color_pair(pair_nb)
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attr |= curses.A_ALTCHARSET if altcharset else 0
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attr |= curses.A_BLINK if blink else 0
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attr |= curses.A_BOLD if bold else 0
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attr |= curses.A_DIM if dim else 0
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attr |= curses.A_INVIS if invis else 0
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# Italic is supported since Python 3.7
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italic &= sys.version_info >= (3, 7,)
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attr |= curses.A_ITALIC if italic else 0
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attr |= curses.A_NORMAL if normal else 0
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attr |= curses.A_PROTECT if protect else 0
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attr |= curses.A_REVERSE if reverse else 0
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attr |= curses.A_STANDOUT if standout else 0
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attr |= curses.A_UNDERLINE if underline else 0
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attr |= curses.A_HORIZONTAL if horizontal else 0
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attr |= curses.A_LEFT if left else 0
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attr |= curses.A_LOW if low else 0
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attr |= curses.A_RIGHT if right else 0
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attr |= curses.A_TOP if top else 0
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attr |= curses.A_VERTICAL if vertical else 0
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attr |= curses.A_CHARTEXT if chartext else 0
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return pad.addstr(y, x, msg, attr)
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def init_pair(self, number: int, foreground: int, background: int) -> None:
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foreground = foreground if self.screen and curses.can_change_color() \
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and foreground < curses.COLORS \
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else curses.COLOR_WHITE
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background = background if self.screen and curses.can_change_color() \
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and background < curses.COLORS \
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else curses.COLOR_WHITE
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return curses.init_pair(number, foreground, background) \
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if self.screen and curses.can_change_color() \
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and number < curses.COLOR_PAIRS else None
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def color_pair(self, number: int) -> int:
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return curses.color_pair(number) if self.screen \
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and number < curses.COLOR_PAIRS else 0
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def init_color(self, number: int, red: int, green: int, blue: int) -> None:
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return curses.init_color(number, red, green, blue) \
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if self.screen and curses.can_change_color() \
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and number < curses.COLORS else None
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def resize(self, y: int, x: int, height: int, width: int,
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resize_pad: bool = True) -> None:
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"""
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Resizes a pad.
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"""
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self.x = x
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self.y = y
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self.width = width
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self.height = height
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if hasattr(self, "pad") and resize_pad and \
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self.height >= 0 and self.width >= 0:
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self.pad.erase()
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self.pad.resize(self.height + 1, self.width + 1)
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def refresh(self, *args, resize_pad: bool = True) -> None:
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"""
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Refreshes a pad
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"""
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if len(args) == 4:
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self.resize(*args, resize_pad)
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self.display()
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def refresh_pad(self, pad: Any, top_y: int, top_x: int,
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window_y: int, window_x: int,
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last_y: int, last_x: int) -> None:
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"""
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Refreshes a pad on a part of the window.
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The refresh starts at coordinates (top_y, top_x) from the pad,
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and is drawn from (window_y, window_x) to (last_y, last_x).
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If coordinates are invalid (negative indexes/length...), then nothing
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is drawn and no error is raised.
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"""
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top_y, top_x = max(0, top_y), max(0, top_x)
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window_y, window_x = max(0, window_y), max(0, window_x)
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screen_max_y, screen_max_x = self.screen.getmaxyx() if self.screen \
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else (42, 42)
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last_y, last_x = min(screen_max_y - 1, last_y), \
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min(screen_max_x - 1, last_x)
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if last_y >= window_y and last_x >= window_x:
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# Refresh the pad only if coordinates are valid
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pad.noutrefresh(top_y, top_x, window_y, window_x, last_y, last_x)
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def display(self) -> None:
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"""
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Draw the content of the display and refresh pads.
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"""
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raise NotImplementedError
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def update(self, game: Game) -> None:
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"""
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The game state was updated.
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Indicate what to do with the new state.
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"""
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raise NotImplementedError
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def handle_click(self, y: int, x: int, attr: int, game: Game) -> None:
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"""
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A mouse click was performed on the coordinates (y, x) of the pad.
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Maybe it should do something.
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"""
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@property
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def rows(self) -> int:
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return curses.LINES if self.screen else 42
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@property
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def cols(self) -> int:
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return curses.COLS if self.screen else 42
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class VerticalSplit(Display):
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"""
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A class to split the screen in two vertically with a pretty line.
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"""
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.pad = self.newpad(self.rows, 1)
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@property
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def width(self) -> int:
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return 1
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@width.setter
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def width(self, val: Any) -> None:
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pass
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def display(self) -> None:
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for i in range(self.height):
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self.addstr(self.pad, i, 0, "┃")
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self.refresh_pad(self.pad, 0, 0, self.y, self.x,
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self.y + self.height - 1, self.x)
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class HorizontalSplit(Display):
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"""
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A class to split the screen in two horizontally with a pretty line.
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"""
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def __init__(self, *args, **kwargs):
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super().__init__(*args, **kwargs)
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self.pad = self.newpad(1, self.cols)
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@property
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def height(self) -> int:
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return 1
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@height.setter
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def height(self, val: Any) -> None:
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pass
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def display(self) -> None:
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for i in range(self.width):
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self.addstr(self.pad, 0, i, "━")
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self.refresh_pad(self.pad, 0, 0, self.y, self.x, self.y,
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self.x + self.width - 1)
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class Box(Display):
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"""
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A class for pretty boxes to print menus and other content.
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"""
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title: str = ""
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def update_title(self, title: str) -> None:
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self.title = title
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def __init__(self, *args, fg_border_color: Optional[int] = None, **kwargs):
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super().__init__(*args, **kwargs)
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self.pad = self.newpad(self.rows, self.cols)
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self.fg_border_color = fg_border_color or curses.COLOR_WHITE
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def display(self) -> None:
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self.addstr(self.pad, 0, 0, "┏" + "━" * (self.width - 2) + "┓",
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self.fg_border_color)
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for i in range(1, self.height - 1):
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self.addstr(self.pad, i, 0, "┃", self.fg_border_color)
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self.addstr(self.pad, i, self.width - 1, "┃", self.fg_border_color)
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self.addstr(self.pad, self.height - 1, 0,
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"┗" + "━" * (self.width - 2) + "┛", self.fg_border_color)
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if self.title:
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self.addstr(self.pad, 0, (self.width - len(self.title) - 8) // 2,
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f" == {self.title} == ", curses.COLOR_GREEN,
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italic=True, bold=True)
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self.refresh_pad(self.pad, 0, 0, self.y, self.x,
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self.y + self.height - 1, self.x + self.width - 1)
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