Book details panel: Pick the color used for links from the current sy…

…stem color theme

resources/templates/book_details.css

@@ -1,6 +1,7 @@
 a { 
     text-decoration: none;
-    color: blue
+    /* LINK_COLOR below will be replaced with the link color defined by the current color theme */
+    color: LINK_COLOR
 }
 
 a:hover {

src/calibre/gui2/book_details.py

@@ -25,6 +25,16 @@
 from calibre.utils.config import tweaks
 from calibre.utils.localization import is_rtl
 
+_css = None
+def css():
+    global _css
+    if _css is None:
+        _css = P('templates/book_details.css', data=True).decode('utf-8')
+        col = QApplication.instance().palette().color(QPalette.Link).name()
+        _css = _css.replace('LINK_COLOR', col)
+    return _css
+
+
 def render_html(mi, css, vertical, widget, all_fields=False, render_data_func=None):  # {{{
     table, comment_fields = (render_data_func or render_data)(mi, all_fields=all_fields,
             use_roman_numbers=config['use_roman_numerals_for_series_number'])
@@ -422,7 +432,6 @@ def __init__(self, vertical, parent=None):
         self.setAcceptDrops(False)
         palette.setBrush(QPalette.Base, Qt.transparent)
         self.page().setPalette(palette)
-        self.css = P('templates/book_details.css', data=True).decode('utf-8')
         for x, icon in [
             ('remove_format', 'trash.png'), ('save_format', 'save.png'),
             ('restore_format', 'edit-undo.png'), ('copy_link','edit-copy.png'),
@@ -485,7 +494,7 @@ def turnoff_scrollbar(self, *args):
         self.page().mainFrame().setScrollBarPolicy(Qt.Horizontal, Qt.ScrollBarAlwaysOff)
 
     def show_data(self, mi):
-        html = render_html(mi, self.css, self.vertical, self.parent())
+        html = render_html(mi, css(), self.vertical, self.parent())
         self.setHtml(html)
 
     def mouseDoubleClickEvent(self, ev):

src/calibre/gui2/dialogs/book_info.py

@@ -14,16 +14,9 @@
 
 from calibre.gui2 import gprefs, NO_URL_FORMATTING
 from calibre import fit_image
-from calibre.gui2.book_details import render_html, details_context_menu_event
+from calibre.gui2.book_details import render_html, details_context_menu_event, css
 from calibre.gui2.widgets import CoverView
 
-_css = None
-def css():
-    global _css
-    if _css is None:
-        _css = P('templates/book_details.css', data=True).decode('utf-8')
-    return _css
-
 class Details(QWebView):
 
     def __init__(self, book_info, parent=None):

src/calibre/gui2/viewer/ui.py

@@ -75,21 +75,20 @@ def __init__(self, parent):
         palette = self.palette()
         palette.setBrush(QPalette.Base, Qt.transparent)
         self.page().setPalette(palette)
-        self.css = P('templates/book_details.css', data=True).decode('utf-8')
         self.setVisible(False)
 
     def update_layout(self):
         self.setGeometry(0, 0, self.parent().width(), self.parent().height())
 
     def show_opf(self, opf, ext=''):
-        from calibre.gui2.book_details import render_html
+        from calibre.gui2.book_details import render_html, css
         from calibre.ebooks.metadata.book.render import mi_to_html
 
         def render_data(mi, use_roman_numbers=True, all_fields=False):
             return mi_to_html(mi, use_roman_numbers=use_roman_numbers, rating_font=rating_font(), rtl=is_rtl())
 
         mi = opf.to_book_metadata()
-        html = render_html(mi, self.css, True, self, render_data_func=render_data)
+        html = render_html(mi, css(), True, self, render_data_func=render_data)
         self.setHtml(html)
 
     def setVisible(self, x):