Refactor set_tab_pinned to take a tab widget.

See #2759

qutebrowser/browser/commands.py

@@ -282,7 +282,12 @@ class CommandDispatcher:
         to_pin = not tab.data.pinned
         tab_index = self._current_index() if count is None else count - 1
         cmdutils.check_overflow(tab_index + 1, 'int')
-        self._tabbed_browser.set_tab_pinned(tab_index, to_pin)
+        tab = self._cntwidget(count)
+
+        if tab is None:
+            raise cmdexc.CommandError("Unable to find tab '{}'.".format(count))
+
+        self._tabbed_browser.set_tab_pinned(tab, to_pin)
 
     @cmdutils.register(instance='command-dispatcher', name='open',
                        maxsplit=0, scope='window')
@@ -515,7 +520,7 @@ class CommandDispatcher:
         newtab.data.keep_icon = True
         newtab.history.deserialize(history)
         newtab.zoom.set_factor(curtab.zoom.factor())
-        new_tabbed_browser.set_tab_pinned(idx, curtab.data.pinned)
+        new_tabbed_browser.set_tab_pinned(newtab, curtab.data.pinned)
         return newtab
 
     @cmdutils.register(instance='command-dispatcher', scope='window')

qutebrowser/mainwindow/tabbedbrowser.py

@@ -342,7 +342,7 @@ class TabbedBrowser(tabwidget.TabWidget):
             newtab = self.tabopen(url, background=False, idx=idx)
 
         newtab.history.deserialize(history_data)
-        self.set_tab_pinned(idx, pinned)
+        self.set_tab_pinned(newtab, pinned)
 
     @pyqtSlot('QUrl', bool)
     def openurl(self, url, newtab):

qutebrowser/mainwindow/tabwidget.py

@@ -26,7 +26,7 @@ from PyQt5.QtCore import (pyqtSignal, pyqtSlot, Qt, QSize, QRect, QPoint,
                           QTimer, QUrl)
 from PyQt5.QtWidgets import (QTabWidget, QTabBar, QSizePolicy, QCommonStyle,
                              QStyle, QStylePainter, QStyleOptionTab,
-                             QStyleFactory)
+                             QStyleFactory, QWidget)
 from PyQt5.QtGui import QIcon, QPalette, QColor
 
 from qutebrowser.utils import qtutils, objreg, utils, usertypes, log
@@ -94,17 +94,18 @@ class TabWidget(QTabWidget):
         bar.set_tab_data(idx, 'indicator-color', color)
         bar.update(bar.tabRect(idx))
 
-    def set_tab_pinned(self, idx, pinned, *, loading=False):
+    def set_tab_pinned(self, tab: QWidget,
+                       pinned: bool, *, loading: bool = False) -> None:
         """Set the tab status as pinned.
 
         Args:
-            idx: The tab index.
+            tab: The tab to pin
             pinned: Pinned tab state to set.
             loading: Whether to ignore current data state when
                      counting pinned_count.
         """
         bar = self.tabBar()
-        tab = self.widget(idx)
+        idx = self.indexOf(tab)
 
         # Only modify pinned_count if we had a change
         # always modify pinned_count if we are loading

qutebrowser/misc/sessions.py

@@ -406,7 +406,7 @@ class SessionManager(QObject):
                     tab_to_focus = i
                 if new_tab.data.pinned:
                     tabbed_browser.set_tab_pinned(
-                        i, new_tab.data.pinned, loading=True)
+                        new_tab, new_tab.data.pinned, loading=True)
             if tab_to_focus is not None:
                 tabbed_browser.setCurrentIndex(tab_to_focus)
             if win.get('active', False):