Add ModeManager

qutebrowser/app.py

@@ -53,6 +53,7 @@ import qutebrowser.config.style as style
 import qutebrowser.config.config as config
 import qutebrowser.network.qutescheme as qutescheme
 import qutebrowser.utils.message as message
+import qutebrowser.utils.modemanager as modemanager
 from qutebrowser.widgets.mainwindow import MainWindow
 from qutebrowser.widgets.crash import CrashDialog
 from qutebrowser.commands.keys import CommandKeyParser
@@ -83,7 +84,6 @@ class QuteBrowser(QApplication):
         _timers: List of used QTimers so they don't get GCed.
         _shutting_down: True if we're currently shutting down.
         _quit_status: The current quitting status.
-        _mode: The mode we're currently in.
         _opened_urls: List of opened URLs.
     """
 
@@ -93,7 +93,6 @@ class QuteBrowser(QApplication):
         self._timers = []
         self._opened_urls = []
         self._shutting_down = False
-        self._mode = None
 
         sys.excepthook = self._exception_hook
 
@@ -130,10 +129,11 @@ class QuteBrowser(QApplication):
         }
         self._init_cmds()
         self.mainwindow = MainWindow()
+        modemanager.init(self.mainwindow.tabs.keypress, self._keyparsers, self)
         self.setQuitOnLastWindowClosed(False)
 
         self._connect_signals()
-        self.set_mode("normal")
+        modemanager.enter("normal")
 
         self.mainwindow.show()
         self._python_hacks()
@@ -246,7 +246,6 @@ class QuteBrowser(QApplication):
         # misc
         self.lastWindowClosed.connect(self.shutdown)
         tabs.quit.connect(self.shutdown)
-        tabs.set_mode.connect(self.set_mode)
         tabs.currentChanged.connect(self.mainwindow.update_inspector)
 
         # status bar
@@ -401,20 +400,6 @@ class QuteBrowser(QApplication):
             logging.debug("maybe_quit quitting.")
             self.quit()
 
-    @pyqtSlot(str)
-    def set_mode(self, mode):
-        """Set a key input mode.
-
-        Args:
-            mode: The new mode to set, as an index for self._keyparsers.
-        """
-        if self._mode is not None:
-            oldhandler = self._keyparsers[self._mode]
-            self.mainwindow.tabs.keypress.disconnect(oldhandler.handle)
-        handler = self._keyparsers[mode]
-        self.mainwindow.tabs.keypress.connect(handler.handle)
-        self._mode = mode
-
     @cmdutils.register(instance='', maxsplit=0)
     def pyeval(self, s):
         """Evaluate a python string and display the results as a webpage.

qutebrowser/browser/hints.py

@@ -28,6 +28,7 @@ from PyQt5.QtWidgets import QApplication
 import qutebrowser.config.config as config
 import qutebrowser.utils.message as message
 import qutebrowser.utils.url as urlutils
+import qutebrowser.utils.modemanager as modemanager
 from qutebrowser.utils.keyparser import KeyParser
 
 
@@ -104,8 +105,6 @@ class HintManager(QObject):
     Signals:
         hint_strings_updated: Emitted when the possible hint strings changed.
                               arg: A list of hint strings.
-        set_mode: Emitted when the input mode should be changed.
-                  arg: The new mode, as a string.
         mouse_event: Mouse event to be posted in the web view.
                      arg: A QMouseEvent
         openurl: Open a new url
@@ -146,7 +145,6 @@ class HintManager(QObject):
     """
 
     hint_strings_updated = pyqtSignal(list)
-    set_mode = pyqtSignal(str)
     mouse_event = pyqtSignal('QMouseEvent')
     set_open_target = pyqtSignal(str)
     set_cmd_text = pyqtSignal(str)
@@ -353,7 +351,6 @@ class HintManager(QObject):
 
         Emit:
             hint_strings_updated: Emitted to update keypraser.
-            set_mode: Emitted to enter hinting mode
         """
         self._target = target
         self._baseurl = baseurl
@@ -395,14 +392,10 @@ class HintManager(QObject):
             self._elems[string] = ElemTuple(e, label)
         frame.contentsSizeChanged.connect(self.on_contents_size_changed)
         self.hint_strings_updated.emit(strings)
-        self.set_mode.emit("hint")
+        modemanager.enter("hint")
 
     def stop(self):
-        """Stop hinting.
-
-        Emit:
-            set_mode: Emitted to leave hinting mode.
-        """
+        """Stop hinting."""
         for elem in self._elems.values():
             elem.label.removeFromDocument()
         self._frame.contentsSizeChanged.disconnect(
@@ -410,7 +403,7 @@ class HintManager(QObject):
         self._elems = {}
         self._target = None
         self._frame = None
-        self.set_mode.emit("normal")
+        modemanager.enter("normal")
         message.clear()
 
     def handle_partial_key(self, keystr):

qutebrowser/utils/modemanager.py

@@ -0,0 +1,106 @@
+# Copyright 2014 Florian Bruhin (The Compiler) <mail@qutebrowser.org>
+#
+# This file is part of qutebrowser.
+#
+# qutebrowser is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# qutebrowser is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with qutebrowser.  If not, see <http://www.gnu.org/licenses/>.
+
+"""Mode manager singleton which handles the current keyboard mode.
+
+Module attributes:
+    manager: The ModeManager instance.
+"""
+
+import logging
+
+from PyQt5.QtCore import QObject
+
+
+manager = None
+
+
+def init(source, parsers=None, parent=None):
+    """Initialize the global ModeManager.
+
+    This needs to be done by hand because the import time is before Qt is ready
+    for everything.
+
+    Args:
+        source: The keypress source signal.
+        parsers: A dict of KeyParsers to register.
+        parent: Parent to use for ModeManager.
+    """
+    global manager
+    manager = ModeManager(source, parsers, parent)
+
+
+def enter(mode):
+    """Enter the mode 'mode'."""
+    manager.enter(mode)
+
+
+def register(mode, handler):
+    """Register a new mode.
+
+    Args:
+        mode: The name of the mode.
+        handler: Handler for keyPressEvents.
+    """
+    manager.register(mode, handler)
+
+
+class ModeManager(QObject):
+
+    """Manager for keyboard modes.
+
+    Attributes:
+        _source: The keypress source signal.
+        _handlers: A dictionary of modes and their handlers.
+        mode: The current mode.
+    """
+
+    def __init__(self, sourcesig, parsers=None, parent=None):
+        """Constructor.
+
+        Args:
+            sourcesig: The signal which gets emitted on a keypress.
+            parsers: A list of parsers to register.
+        """
+        super().__init__(parent)
+        self._source = sourcesig
+        self._handlers = {}
+        self.mode = None
+        if parsers is not None:
+            for name, parser in parsers.items():
+                self._handlers[name] = parser.handle
+
+    def register(self, mode, handler):
+        """Register a new mode.
+
+        Args:
+            mode: The name of the mode.
+            handler: Handler for keyPressEvents.
+        """
+        self._handlers[mode] = handler
+
+    def enter(self, mode):
+        """Enter a new mode."""
+        oldmode = self.mode
+        logging.debug("Switching mode: {} -> {}".format(oldmode, mode))
+        if oldmode is not None:
+            try:
+                self._source.disconnect(self._handlers[oldmode])
+            except TypeError:
+                logging.debug("Could not disconnect mode {}".format(oldmode))
+        self._source.connect(self._handlers[mode])
+        self.mode = mode

qutebrowser/widgets/tabbedbrowser.py

@@ -69,8 +69,6 @@ class TabbedBrowser(TabWidget):
                                  arg 2: y-position in %.
         hint_strings_updated: Hint strings were updated.
                               arg: A list of hint strings.
-        set_mode: The input mode should be changed.
-                  arg: The new mode as a string.
         keypress: A key was pressed.
                   arg: The QKeyEvent leading to the keypress.
         shutdown_complete: The shuttdown is completed.
@@ -89,7 +87,6 @@ class TabbedBrowser(TabWidget):
     cur_scroll_perc_changed = pyqtSignal(int, int)
     hint_strings_updated = pyqtSignal(list)
     set_cmd_text = pyqtSignal(str)
-    set_mode = pyqtSignal(str)
     keypress = pyqtSignal('QKeyEvent')
     shutdown_complete = pyqtSignal()
     quit = pyqtSignal()
@@ -143,7 +140,6 @@ class TabbedBrowser(TabWidget):
         tab.urlChanged.connect(self._filter.create(self.cur_url_changed))
         # hintmanager
         tab.hintmanager.hint_strings_updated.connect(self.hint_strings_updated)
-        tab.hintmanager.set_mode.connect(self.set_mode)
         tab.hintmanager.set_cmd_text.connect(self.set_cmd_text)
         # misc
         tab.titleChanged.connect(self.on_title_changed)