Set favicon size to tabbar size.

Fixes #119. Also see #754

qutebrowser/browser/network/qutescheme.py

@@ -153,7 +153,7 @@ def qute_help(win_id, request):
     """Handler for qute:help. Return HTML content as bytes."""
     try:
         utils.read_file('html/doc/index.html')
-    except FileNotFoundError:
+    except (FileNotFoundError, NotADirectoryError, OSError, BlockingIOError):
         html = jinja.env.get_template('error.html').render(
             title="Error while loading documentation",
             url=request.url().toDisplayString(),

qutebrowser/mainwindow/tabbedbrowser.py

@@ -108,9 +108,6 @@ class TabbedBrowser(tabwidget.TabWidget):
         self._undo_stack = []
         self._filter = signalfilter.SignalFilter(win_id, self)
         self._now_focused = None
-        # FIXME adjust this to font size
-        # https://github.com/The-Compiler/qutebrowser/issues/119
-        self.setIconSize(QSize(12, 12))
         objreg.get('config').changed.connect(self.update_favicons)
         objreg.get('config').changed.connect(self.update_window_title)
         objreg.get('config').changed.connect(self.update_tab_titles)

qutebrowser/mainwindow/tabwidget.py

@@ -24,7 +24,7 @@ Module attributes:
                       between items.
 """
 
-import functools
+import functools, math
 
 from PyQt5.QtCore import pyqtSignal, pyqtSlot, Qt, QSize, QRect, QPoint, QTimer
 from PyQt5.QtWidgets import (QTabWidget, QTabBar, QSizePolicy, QCommonStyle,
@@ -296,6 +296,12 @@ class TabBar(QTabBar):
         """Set the tab bar font."""
         self.setFont(config.get('fonts', 'tabbar'))
 
+    def resizeEvent(self, s):
+        height = self.size().height()
+        if height > 0:
+            height = math.ceil(height - height / 7)
+            self.setIconSize(QSize(height, height))
+
     @config.change_filter('colors', 'tabs.bg.bar')
     def set_colors(self):
         """Set the tab bar colors."""