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comparison cagou/core/simple_xhtml.py @ 422:efee0e0afb78

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core (common): moved simple_xhtml's image code to a generic "SizedImage" widget
author Goffi <goffi@goffi.org>
date Wed, 26 Feb 2020 16:41:27 +0100
parents 1da3c379205b
children 2d277a3d9cec
comparison
equal deleted inserted replaced
421:ddca5a837029 422:efee0e0afb78
20 20
21 from xml.etree import ElementTree as ET 21 from xml.etree import ElementTree as ET
22 from kivy.uix.stacklayout import StackLayout 22 from kivy.uix.stacklayout import StackLayout
23 from kivy.uix.label import Label 23 from kivy.uix.label import Label
24 from kivy.utils import escape_markup 24 from kivy.utils import escape_markup
25 from kivy.metrics import sp, dp 25 from kivy.metrics import sp
26 from kivy import properties 26 from kivy import properties
27 from sat.core import log as logging 27 from sat.core import log as logging
28 from sat_frontends.tools import css_color, strings as sat_strings 28 from sat_frontends.tools import css_color, strings as sat_strings
29 from cagou import G 29 from cagou import G
30 from cagou.core.image import AsyncImage 30 from cagou.core.common import SizedImage
31 from cagou.core.constants import Const as C
32 31
33 32
34 log = logging.getLogger(__name__) 33 log = logging.getLogger(__name__)
35 34
36 35
85 class SimpleXHTMLWidgetText(Label): 84 class SimpleXHTMLWidgetText(Label):
86 85
87 def on_parent(self, instance, parent): 86 def on_parent(self, instance, parent):
88 if parent is not None: 87 if parent is not None:
89 self.font_size = parent.font_size 88 self.font_size = parent.font_size
90
91
92 class SimpleXHTMLWidgetImage(AsyncImage):
93 # following properties are desired height/width
94 # i.e. the ones specified in height/width attributes of <img>
95 # (or wanted for whatever reason)
96 # set to None to ignore them
97 target_height = properties.NumericProperty(allownone=True)
98 target_width = properties.NumericProperty(allownone=True)
99
100 def __init__(self, **kwargs):
101 # best calculated size
102 self._best_width = self._best_height = 100
103 super().__init__(**kwargs)
104
105 def on_texture(self, instance, texture):
106 """Adapt the size according to max size and target_*"""
107 if texture is None:
108 return
109 max_width, max_height = dp(C.IMG_MAX_WIDTH), dp(C.IMG_MAX_HEIGHT)
110 width, height = texture.size
111 if self.target_width:
112 width = min(width, self.target_width)
113 if width > max_width:
114 width = C.IMG_MAX_WIDTH
115
116 height = width / self.image_ratio
117
118 if self.target_height:
119 height = min(height, self.target_height)
120
121 if height > max_height:
122 height = max_height
123 width = height * self.image_ratio
124
125 self.width, self.height = self._best_width, self._best_height = width, height
126
127 def on_parent(self, instance, parent):
128 if parent is not None:
129 parent.bind(width=self.on_parent_width)
130
131 def on_parent_width(self, instance, width):
132 if self._best_width > width:
133 self.width = width
134 self.height = width / self.image_ratio
135 else:
136 self.width, self.height = self._best_width, self._best_height
137 89
138 90
139 class SimpleXHTMLWidget(StackLayout): 91 class SimpleXHTMLWidget(StackLayout):
140 """widget handling simple XHTML parsing""" 92 """widget handling simple XHTML parsing"""
141 xhtml = properties.StringProperty() 93 xhtml = properties.StringProperty()
433 target_width = int(elem.get('width', 0)) 385 target_width = int(elem.get('width', 0))
434 except ValueError: 386 except ValueError:
435 log.warning(f"Can't parse image width: {elem.get('width')}") 387 log.warning(f"Can't parse image width: {elem.get('width')}")
436 target_width = None 388 target_width = None
437 389
438 img = SimpleXHTMLWidgetImage(source=src, target_height=target_height, target_width=target_width) 390 img = SizedImage(
391 source=src, target_height=target_height, target_width=target_width)
439 self.current_wid = img 392 self.current_wid = img
440 self.add_widget(img) 393 self.add_widget(img)
441 394
442 def xhtml_p(self, elem): 395 def xhtml_p(self, elem):
443 if isinstance(self.current_wid, Label): 396 if isinstance(self.current_wid, Label):