/usr/lib/python3/dist-packages/plainbox/vendor/textland/drawing.py is in python3-plainbox 0.25-1.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 | # This file is part of textland.
#
# Copyright 2014 Canonical Ltd.
# Written by:
# Zygmunt Krynicki <zygmunt.krynicki@canonical.com>
#
# Textland is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 3,
# as published by the Free Software Foundation.
#
# Textland is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Textland. If not, see <http://www.gnu.org/licenses/>.
from .bits import Offset, Rect
from .image import TextImage, TextAttributes
class DrawingContext:
"""
Context for simple text drawing
"""
def __init__(self, image: TextImage):
self.image = image
self.offset = Offset(0, 0)
self.clip = Rect(0, 0, image.size.width, image.size.height)
self.attributes = TextAttributes()
def fill(self, c: str) -> None:
packed_attr = self.attributes.packed
for x in range(self.clip.x1, self.clip.x2):
for y in range(self.clip.y1, self.clip.y2):
self.image.put(x, y, c, packed_attr)
def clip_to(self, x1: int, y1: int, x2: int, y2: int) -> None:
self.clip = Rect(x1, y1, x2, y2)
def clip_by(self, dx1: int, dy1: int, dx2: int, dy2: int) -> None:
x1 = self.clip.x1 + dx1
y1 = self.clip.y1 + dy1
x2 = self.clip.x2 + dx2
y2 = self.clip.y2 + dy2
self.clip = Rect(x1, y1, x2, y2)
def move_to(self, x: int, y: int) -> None:
"""
Move paint offset to the specified spot
"""
self.offset = Offset(x, y)
def move_by(self, dx: int, dy: int) -> None:
"""
Move paint offset by the specified delta
"""
self.offset = Offset(self.offset.x + dx, self.offset.y + dy)
def print(self, text: str) -> None:
"""
Print the specified text
Multi-line strings are supported. The offset and clipping area
is respected. Painting beyond the clipping area is ignored
The offset is automatically adjusted to point
to the end of the string.
"""
pa = self.attributes.packed
for line in text.splitlines():
self._put_line(line, pa)
self.move_by(0, 1)
def border(self, lm=0, rm=0, tm=0, bm=0) -> None:
"""
Draw a border around the edges of the current cli. Each parameter
specifies the margin to use for a specific side of the border.
"""
pa = self.attributes.packed
self._put_x_y_c_pa(self.clip.x1 + lm, self.clip.y1 + tm, '┌', pa)
self._put_x_y_c_pa(self.clip.x1 + lm, self.clip.y2 - 1 - bm, '└', pa)
self._put_x_y_c_pa(self.clip.x2 - rm - 1, self.clip.y1 + tm, '┐', pa)
self._put_x_y_c_pa(
self.clip.x2 - rm - 1, self.clip.y2 - 1 - bm, '┘', pa)
for x in range(self.clip.x1 + 1 + lm, self.clip.x2 - 1 - rm):
self._put_x_y_c_pa(x, self.clip.y1 + tm, '─', pa)
self._put_x_y_c_pa(x, self.clip.y2 - 1 - bm, '─', pa)
for y in range(self.clip.y1 + 1 + tm, self.clip.y2 - 1 - bm):
self._put_x_y_c_pa(self.clip.x1 + lm, y, '│', pa)
self._put_x_y_c_pa(self.clip.x2 - rm - 1, y, '│', pa)
def _put_line(self, text: str, pa: int) -> None:
"""
Print one line, respecting clipping and offset
"""
if "\n" in text:
raise ValueError("should be without any newlines")
for dx, c in enumerate(text):
self._put_dx_dy_c_pa(dx, 0, c, pa)
def _put_dx_dy_c_pa(self, dx: int, dy: int, c: str, pa: int) -> None:
x = self.offset.x + dx
y = self.offset.y + dy
self._put_x_y_c_pa(x, y, c, pa)
def _put_x_y_c_pa(self, x: int, y: int, c: str, pa: int) -> None:
if (self.clip.x1 <= x < self.clip.x2
and self.clip.y1 <= y < self.clip.y2):
self.image.put(x, y, c, pa)
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