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"""
Defines a window which contains either an image or a border.
"""
import curses
from io import BytesIO
try:
from PIL import Image
HAS_PIL = True
except ImportError:
HAS_PIL = False
from poezio.windows.base_wins import Win
from poezio.theming import to_curses_attr
from poezio.xhtml import _parse_css_color
class ImageWin(Win):
"""
A window which contains either an image or a border.
"""
def __init__(self):
self._image = None
Win.__init__(self)
def resize(self, height: int, width: int, y: int, x: int):
self._resize(height, width, y, x)
if self._image is None:
return
_display_avatar(width, height)
def refresh(self, data):
self._win.clear()
if data is None or not HAS_PIL:
self._image = None
self._display_border()
else:
image_file = BytesIO(data)
self._image = Image.open(image_file).convert('RGB')
self._display_avatar(self.width, self.height)
self._refresh()
def _display_border(self):
self._win.border(curses.ACS_VLINE, curses.ACS_VLINE,
curses.ACS_HLINE, curses.ACS_HLINE,
curses.ACS_ULCORNER, curses.ACS_URCORNER,
curses.ACS_LLCORNER, curses.ACS_LRCORNER)
@staticmethod
def _compute_size(image_size, width: int, height: int):
height *= 2
src_width, src_height = image_size
ratio = src_width / src_height
new_width = height * ratio
new_height = width / ratio
if new_width > width:
height = int(new_height)
elif new_height > height:
width = int(new_width)
return width, height
def _display_avatar(self, width: int, height: int):
original_height = height
original_width = width
size = self._compute_size(self._image.size, width, height)
image2 = self._image.resize(size, resample=Image.BILINEAR)
data = image2.tobytes()
width, height = size
start_y = (original_height - height // 2) // 2
start_x = (original_width - width) // 2
for y in range(height // 2):
two_lines = data[(2 * y) * width * 3: (2 * y + 2) * width * 3]
line1 = two_lines[:width * 3]
line2 = two_lines[width * 3:]
self.move(start_y + y, start_x)
for x in range(width):
r, g, b = line1[x * 3: (x + 1) * 3]
top_color = _parse_css_color('#%02x%02x%02x' % (r, g, b))
r, g, b = line2[x * 3: (x + 1) * 3]
bot_color = _parse_css_color('#%02x%02x%02x' % (r, g, b))
self.addstr('▄', to_curses_attr((bot_color, top_color)))
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