epub converter: fix bg-color

src/css_reader.py

@@ -95,13 +95,13 @@ to suit livecarta style convention.
 
 def get_bg_color(x):
     color = str2hex(x)
-    color = color if color not in ['#ffffff', '#fff'] else ''
+    color = color if color not in ['#ffffff', '#fff', 'white'] else ''
     return color
 
 
 def get_text_color(x):
     color = str2hex(x)
-    color = color if color not in ['#000000', '#000'] else ''
+    color = color if color not in ['#000000', '#000', 'black'] else ''
     return color
 
 
@@ -180,7 +180,7 @@ def clean_css(css):
 
 def add_inline_style_to_html_soup(soup1, css_text):
     livecarta_tmp_ids = []
-    h_regex = f'(^h[{LawCartaConfig.SUPPORTED_LEVELS + 1}-9]$)'
+    h_regex = f'(^h[1-9]$)'
     could_have_style_in_livecarta_regexp = re.compile('(^p$)|(^span$)|(^li$)|(^ul$)|(^ol$)|(^td$)|(^th$)|' + h_regex)
     elements_with_possible_style_attr = soup1.find_all(could_have_style_in_livecarta_regexp)
     for i, x in enumerate(elements_with_possible_style_attr):
@@ -193,8 +193,28 @@ def add_inline_style_to_html_soup(soup1, css_text):
                                        disable_validation=True)
     soup2 = BeautifulSoup(html_with_inline_style, features='lxml')
 
-    def remove_white_if_no_bgcolor(style_):
-        if ('color:white' in style_) and ('background' not in style_):
+    def remove_white_if_no_bgcolor(style_, tag):
+        if 'background' in style_:
+            return style_
+
+        # if text color is white, check that we have bg-color
+        if ('color:#ffffff' in style_) or ('color:#fff' in style_) or ('color:white' in style_):
+            # if bg color is inherited, just return style as is
+            for parent_tag in tag.parents:
+                # white bg color not need to be checked as we do not write 'white bg color'
+                if parent_tag.attrs.get('style') and ('background' in parent_tag.attrs.get('style')):
+                    print(tag, parent_tag.attrs.get('style'))
+                    return style_
+
+            children = tag.find_all()
+            for child in children:
+                if child.attrs.get('style') and ('background' in child.attrs.get('style')):
+                    tmp_style = child.attrs['style'] + '; color:#fff; '
+                    child.attrs['style'] = tmp_style
+
+            # for child with bg color we added white text color, so this tag don't need white color
+            style_ = style_.replace('color:#fff;', '')
+            style_ = style_.replace('color:#ffffff;', '')
             style_ = style_.replace('color:white;', '')
         return style_
 
@@ -209,7 +229,7 @@ def add_inline_style_to_html_soup(soup1, css_text):
         tag_with_style = soup2.find(attrs={'livecarta_id': i})
         if tag_with_style.attrs.get('style'):
             style = tag_with_style.attrs.get('style') + ';'
-            style = remove_white_if_no_bgcolor(style)
+            style = remove_white_if_no_bgcolor(style, tag_with_style)
             style = style.replace('background:', 'background-color:')
             to_remove = check_style_to_be_tag(style)
             new_tags = []