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editor: Fix highlighting lines on themes with bright backgrounds

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- For bright backgrounds brightening the line doesn't stand out,
  so darken the line instead.
This commit is contained in:
Andrew Hamilton 2022-06-28 23:14:49 +10:00
parent c049aeeee7
commit 07e0ce9f56
1 changed files with 19 additions and 10 deletions
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29
diff_edit/editor.py
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@ -32,13 +32,6 @@ def highlight_str(line, bg_color, transparency=0.6):
return termstr.TermStr(line).transform_style(blend_style)
def highlight_line(line):
return highlight_str(line, termstr.Color.white, 0.8)
NATIVE_STYLE = pygments.styles.get_style_by_name("paraiso-dark")
@functools.lru_cache(maxsize=500)
def parse_rgb(hex_rgb):
if hex_rgb.startswith("#"):
@ -46,6 +39,21 @@ def parse_rgb(hex_rgb):
return tuple(int("0x" + hex_rgb[index:index+2], base=16) for index in [0, 2, 4])
@functools.cache
def is_bright_theme(theme):
return sum(parse_rgb(theme.background_color)) > (255 * 3 / 2)
def highlight_line(line, theme=None):
if theme is not None and is_bright_theme(theme):
return highlight_str(line, termstr.Color.black, 0.8)
else:
return highlight_str(line, termstr.Color.white, 0.8)
NATIVE_STYLE = pygments.styles.get_style_by_name("paraiso-dark")
@functools.lru_cache(maxsize=500)
def char_style_for_token_type(token_type, style):
default_bg_color = parse_rgb(style.background_color)
@ -319,7 +327,8 @@ class Parts:
appearance, coords = wrap_text(parts, width - 1, pad_char)
line_num = coords[self.cursor][0] // (width - 1)
if self.is_focused:
appearance[line_num] = highlight_line(appearance[line_num])
appearance[line_num] = highlight_line(appearance[line_num],
self.editor.text_widget.theme)
view_widget = fill3.View.from_widget(fill3.Fixed(appearance))
if line_num >= height:
x, y = view_widget.portal.position
@ -329,7 +338,7 @@ class Parts:
else:
if self.is_focused:
line_num = coords[self.cursor][0] // width
result[line_num] = highlight_line(result[line_num])
result[line_num] = highlight_line(result[line_num], self.editor.text_widget.theme)
fg_color = termstr.Color.grey_100
bg_color = parse_rgb(self.editor.text_widget.theme.background_color)
result.append(termstr.TermStr("─").bg_color(bg_color).fg_color(fg_color) * width)
@ -440,7 +449,7 @@ class TextEditor:
return appearance
if self.mark is None:
if 0 <= cursor_y < len(appearance):
appearance[cursor_y] = highlight_line(appearance[cursor_y])
appearance[cursor_y] = highlight_line(appearance[cursor_y], self.text_widget.theme)
else:
self._highlight_selection(appearance)
if self.cursor_x >= len(appearance[0]):