Refactor console

- All top-level window objects are now persistent. It turns out that urwid
keeps a reference to these even after they're no longer used, so they were
leaking before.
- Revamp editors to work with console commands, and start reworking bindings
for flowview.

17 files changed, 365 insertions, 366 deletions

diff --git a/mitmproxy/addons/view.py b/mitmproxy/addons/view.py
index c9c9cbed..a35ca532 100644
--- a/mitmproxy/addons/view.py
+++ b/mitmproxy/addons/view.py
@@ -202,6 +202,15 @@ class View(collections.Sequence):
         self.sig_view_refresh.send(self)
 
     # API
+    @command.command("view.focus.next")
+    def focus_next(self) -> None:
+        """
+            A list of all the orders we support.
+        """
+        idx = self.focus.index + 1
+        if self.inbounds(idx):
+            self.focus.flow = self[idx]
+
     @command.command("view.order.options")
     def order_options(self) -> typing.Sequence[str]:
         """
diff --git a/mitmproxy/tools/console/commands.py b/mitmproxy/tools/console/commands.py
index 689aa637..84455a88 100644
--- a/mitmproxy/tools/console/commands.py
+++ b/mitmproxy/tools/console/commands.py
@@ -146,6 +146,8 @@ class CommandHelp(urwid.Frame):
 
 
 class Commands(urwid.Pile):
+    keyctx = "commands"
+
     def __init__(self, master):
         oh = CommandHelp(master)
         super().__init__(
diff --git a/mitmproxy/tools/console/flowdetailview.py b/mitmproxy/tools/console/flowdetailview.py
index 9ed063bc..6bca2a2f 100644
--- a/mitmproxy/tools/console/flowdetailview.py
+++ b/mitmproxy/tools/console/flowdetailview.py
@@ -183,4 +183,4 @@ def flowdetails(state, flow: http.HTTPFlow):
         text.append(urwid.Text([("head", "Timing:")]))
         text.extend(common.format_keyvals(parts, key="key", val="text", indent=4))
 
-    return searchable.Searchable(state, text)
+    return searchable.Searchable(text)
diff --git a/mitmproxy/tools/console/flowlist.py b/mitmproxy/tools/console/flowlist.py
index 7400c16c..b14d27e7 100644
--- a/mitmproxy/tools/console/flowlist.py
+++ b/mitmproxy/tools/console/flowlist.py
@@ -1,7 +1,6 @@
 import urwid
 
 from mitmproxy.tools.console import common
-from mitmproxy.tools.console import signals
 import mitmproxy.tools.console.master # noqa
 
 
@@ -145,14 +144,8 @@ class FlowListWalker(urwid.ListWalker):
 
     def __init__(self, master):
         self.master = master
-        self.master.view.sig_view_refresh.connect(self.sig_mod)
-        self.master.view.sig_view_add.connect(self.sig_mod)
-        self.master.view.sig_view_remove.connect(self.sig_mod)
-        self.master.view.sig_view_update.connect(self.sig_mod)
-        self.master.view.focus.sig_change.connect(self.sig_mod)
-        signals.flowlist_change.connect(self.sig_mod)
-
-    def sig_mod(self, *args, **kwargs):
+
+    def view_changed(self):
         self._modified()
 
     def get_focus(self):
@@ -164,7 +157,6 @@ class FlowListWalker(urwid.ListWalker):
     def set_focus(self, index):
         if self.master.view.inbounds(index):
             self.master.view.focus.index = index
-            signals.flowlist_change.send(self)
 
     def get_next(self, pos):
         pos = pos + 1
@@ -182,6 +174,7 @@ class FlowListWalker(urwid.ListWalker):
 
 
 class FlowListBox(urwid.ListBox):
+    keyctx = "flowlist"
 
     def __init__(
         self, master: "mitmproxy.tools.console.master.ConsoleMaster"
@@ -192,3 +185,6 @@ class FlowListBox(urwid.ListBox):
     def keypress(self, size, key):
         key = common.shortcuts(key)
         return urwid.ListBox.keypress(self, size, key)
+
+    def view_changed(self):
+        self.body.view_changed()
diff --git a/mitmproxy/tools/console/flowview.py b/mitmproxy/tools/console/flowview.py
index b7b7053f..ea61f65f 100644
--- a/mitmproxy/tools/console/flowview.py
+++ b/mitmproxy/tools/console/flowview.py
@@ -9,11 +9,9 @@ import urwid
 from mitmproxy import contentviews
 from mitmproxy import exceptions
 from mitmproxy import http
-from mitmproxy.net.http import Headers
 from mitmproxy.net.http import status_codes
 from mitmproxy.tools.console import common
 from mitmproxy.tools.console import flowdetailview
-from mitmproxy.tools.console import grideditor
 from mitmproxy.tools.console import overlay
 from mitmproxy.tools.console import searchable
 from mitmproxy.tools.console import signals
@@ -106,49 +104,51 @@ class FlowViewHeader(urwid.WidgetWrap):
     def __init__(
         self,
         master: "mitmproxy.tools.console.master.ConsoleMaster",
-        f: http.HTTPFlow
     ) -> None:
         self.master = master
-        self.flow = f
-        self._w = common.format_flow(
-            f,
-            False,
-            extended=True,
-            hostheader=self.master.options.showhost
-        )
-        signals.flow_change.connect(self.sig_flow_change)
+        self.focus_changed()
 
-    def sig_flow_change(self, sender, flow):
-        if flow == self.flow:
+    def focus_changed(self):
+        if self.master.view.focus.flow:
             self._w = common.format_flow(
-                flow,
+                self.master.view.focus.flow,
                 False,
                 extended=True,
                 hostheader=self.master.options.showhost
             )
+        else:
+            self._w = urwid.Pile([])
 
 
 TAB_REQ = 0
 TAB_RESP = 1
 
 
-class FlowView(tabs.Tabs):
+class FlowDetails(tabs.Tabs):
     highlight_color = "focusfield"
 
-    def __init__(self, master, view, flow, tab_offset):
-        self.master, self.view, self.flow = master, view, flow
-        super().__init__(
-            [
+    def __init__(self, master, tab_offset):
+        self.master = master
+        super().__init__([], tab_offset)
+        self.show()
+        self.last_displayed_body = None
+
+    def focus_changed(self):
+        if self.master.view.focus.flow:
+            self.tabs = [
                 (self.tab_request, self.view_request),
                 (self.tab_response, self.view_response),
                 (self.tab_details, self.view_details),
-            ],
-            tab_offset
-        )
-
+            ]
         self.show()
-        self.last_displayed_body = None
-        signals.flow_change.connect(self.sig_flow_change)
+
+    @property
+    def view(self):
+        return self.master.view
+
+    @property
+    def flow(self):
+        return self.master.view.focus.flow
 
     def tab_request(self):
         if self.flow.intercepted and not self.flow.response:
@@ -174,10 +174,6 @@ class FlowView(tabs.Tabs):
     def view_details(self):
         return flowdetailview.flowdetails(self.view, self.flow)
 
-    def sig_flow_change(self, sender, flow):
-        if flow == self.flow:
-            self.show()
-
     def content_view(self, viewmode, message):
         if message.raw_content is None:
             msg, body = "", [urwid.Text([("error", "[content missing]")])]
@@ -288,7 +284,7 @@ class FlowView(tabs.Tabs):
                     ]
                 )
             ]
-        return searchable.Searchable(self.view, txt)
+        return searchable.Searchable(txt)
 
     def set_method_raw(self, m):
         if m:
@@ -330,44 +326,6 @@ class FlowView(tabs.Tabs):
         self.flow.response.reason = reason
         signals.flow_change.send(self, flow = self.flow)
 
-    def set_headers(self, fields, conn):
-        conn.headers = Headers(fields)
-        signals.flow_change.send(self, flow = self.flow)
-
-    def set_query(self, lst, conn):
-        conn.query = lst
-        signals.flow_change.send(self, flow = self.flow)
-
-    def set_path_components(self, lst, conn):
-        conn.path_components = lst
-        signals.flow_change.send(self, flow = self.flow)
-
-    def set_form(self, lst, conn):
-        conn.urlencoded_form = lst
-        signals.flow_change.send(self, flow = self.flow)
-
-    def edit_form(self, conn):
-        self.master.view_grideditor(
-            grideditor.URLEncodedFormEditor(
-                self.master,
-                conn.urlencoded_form.items(multi=True),
-                self.set_form,
-                conn
-            )
-        )
-
-    def edit_form_confirm(self, key, conn):
-        if key == "y":
-            self.edit_form(conn)
-
-    def set_cookies(self, lst, conn):
-        conn.cookies = lst
-        signals.flow_change.send(self, flow = self.flow)
-
-    def set_setcookies(self, data, conn):
-        conn.cookies = data
-        signals.flow_change.send(self, flow = self.flow)
-
     def edit(self, part):
         if self.tab_offset == TAB_REQ:
             message = self.flow.request
@@ -377,24 +335,6 @@ class FlowView(tabs.Tabs):
             message = self.flow.response
 
         self.flow.backup()
-        if message == self.flow.request and part == "c":
-            self.master.view_grideditor(
-                grideditor.CookieEditor(
-                    self.master,
-                    message.cookies.items(multi=True),
-                    self.set_cookies,
-                    message
-                )
-            )
-        if message == self.flow.response and part == "c":
-            self.master.view_grideditor(
-                grideditor.SetCookieEditor(
-                    self.master,
-                    message.cookies.items(multi=True),
-                    self.set_setcookies,
-                    message
-                )
-            )
         if part == "r":
             # Fix an issue caused by some editors when editing a
             # request/response body. Many editors make it hard to save a
@@ -404,46 +344,6 @@ class FlowView(tabs.Tabs):
             # from an editor.
             c = self.master.spawn_editor(message.get_content(strict=False) or b"")
             message.content = c.rstrip(b"\n")
-        elif part == "f":
-            if not message.urlencoded_form and message.raw_content:
-                signals.status_prompt_onekey.send(
-                    prompt = "Existing body is not a URL-encoded form. Clear and edit?",
-                    keys = [
-                        ("yes", "y"),
-                        ("no", "n"),
-                    ],
-                    callback = self.edit_form_confirm,
-                    args = (message,)
-                )
-            else:
-                self.edit_form(message)
-        elif part == "h":
-            self.master.view_grideditor(
-                grideditor.HeaderEditor(
-                    self.master,
-                    message.headers.fields,
-                    self.set_headers,
-                    message
-                )
-            )
-        elif part == "p":
-            p = message.path_components
-            self.master.view_grideditor(
-                grideditor.PathEditor(
-                    self.master,
-                    p,
-                    self.set_path_components,
-                    message
-                )
-            )
-        elif part == "q":
-            self.master.view_grideditor(
-                grideditor.QueryEditor(
-                    self.master,
-                    message.query.items(multi=True),
-                    self.set_query, message
-                )
-            )
         elif part == "u":
             signals.status_prompt.send(
                 prompt = "URL",
@@ -500,12 +400,6 @@ class FlowView(tabs.Tabs):
 
         key = super().keypress(size, key)
 
-        # Special case: Space moves over to the next flow.
-        # We need to catch that before applying common.shortcuts()
-        if key == " ":
-            self.view_next_flow(self.flow)
-            return
-
         key = common.shortcuts(key)
         if key in ("up", "down", "page up", "page down"):
             # Pass scroll events to the wrapped widget
@@ -689,3 +583,18 @@ class FlowView(tabs.Tabs):
         }
         conn.encode(encoding_map[key])
         signals.flow_change.send(self, flow = self.flow)
+
+
+class FlowView(urwid.Frame):
+    keyctx = "flowview"
+
+    def __init__(self, master):
+        super().__init__(
+            FlowDetails(master, 0),
+            header = FlowViewHeader(master),
+        )
+        self.master = master
+
+    def focus_changed(self, *args, **kwargs):
+        self.body.focus_changed()
+        self.header.focus_changed()
diff --git a/mitmproxy/tools/console/grideditor/base.py b/mitmproxy/tools/console/grideditor/base.py
index 151479a4..9d833e1f 100644
--- a/mitmproxy/tools/console/grideditor/base.py
+++ b/mitmproxy/tools/console/grideditor/base.py
@@ -252,13 +252,12 @@ FIRST_WIDTH_MAX = 40
 FIRST_WIDTH_MIN = 20
 
 
-class GridEditor(urwid.WidgetWrap):
-    title = None  # type: str
-    columns = None  # type: Sequence[Column]
-
+class BaseGridEditor(urwid.WidgetWrap):
     def __init__(
             self,
             master: "mitmproxy.tools.console.master.ConsoleMaster",
+            title,
+            columns,
             value: Any,
             callback: Callable[..., None],
             *cb_args,
@@ -266,6 +265,8 @@ class GridEditor(urwid.WidgetWrap):
     ) -> None:
         value = self.data_in(copy.deepcopy(value))
         self.master = master
+        self.title = title
+        self.columns = columns
         self.value = value
         self.callback = callback
         self.cb_args = cb_args
@@ -307,6 +308,13 @@ class GridEditor(urwid.WidgetWrap):
         signals.footer_help.send(self, helptext="")
         self.show_empty_msg()
 
+    def view_popping(self):
+        res = []
+        for i in self.walker.lst:
+            if not i[1] and any([x for x in i[0]]):
+                res.append(i[0])
+        self.callback(self.data_out(res), *self.cb_args, **self.cb_kwargs)
+
     def show_empty_msg(self):
         if self.walker.lst:
             self._w.set_footer(None)
@@ -339,14 +347,7 @@ class GridEditor(urwid.WidgetWrap):
 
         key = common.shortcuts(key)
         column = self.columns[self.walker.focus_col]
-        if key in ["q", "esc"]:
-            res = []
-            for i in self.walker.lst:
-                if not i[1] and any([x for x in i[0]]):
-                    res.append(i[0])
-            self.callback(self.data_out(res), *self.cb_args, **self.cb_kwargs)
-            signals.pop_view_state.send(self)
-        elif key == "g":
+        if key == "g":
             self.walker.set_focus(0)
         elif key == "G":
             self.walker.set_focus(len(self.walker.lst) - 1)
@@ -415,3 +416,74 @@ class GridEditor(urwid.WidgetWrap):
             )
         )
         return text
+
+
+class GridEditor(urwid.WidgetWrap):
+    title = None  # type: str
+    columns = None  # type: Sequence[Column]
+
+    def __init__(
+            self,
+            master: "mitmproxy.tools.console.master.ConsoleMaster",
+            value: Any,
+            callback: Callable[..., None],
+            *cb_args,
+            **cb_kwargs
+    ) -> None:
+        super().__init__(
+            master,
+            value,
+            self.title,
+            self.columns,
+            callback,
+            *cb_args,
+            **cb_kwargs
+        )
+
+
+class FocusEditor(urwid.WidgetWrap):
+    """
+        A specialised GridEditor that edits the current focused flow.
+    """
+    keyctx = "grideditor"
+
+    def __init__(self, master):
+        self.master = master
+        self.focus_changed()
+
+    def focus_changed(self):
+        if self.master.view.focus.flow:
+            self._w = BaseGridEditor(
+                self.master.view.focus.flow,
+                self.title,
+                self.columns,
+                self.get_data(self.master.view.focus.flow),
+                self.set_data_update,
+                self.master.view.focus.flow,
+            )
+        else:
+            self._w = urwid.Pile([])
+
+    def call(self, v, name, *args, **kwargs):
+        f = getattr(v, name, None)
+        if f:
+            f(*args, **kwargs)
+
+    def view_popping(self):
+        self.call(self._w, "view_popping")
+
+    def get_data(self, flow):
+        """
+            Retrieve the data to edit from the current flow.
+        """
+        raise NotImplementedError
+
+    def set_data_update(self, flow, vals):
+        self.set_data(flow, vals)
+        signals.flow_change.send(self, flow = flow)
+
+    def set_data(self, flow, vals):
+        """
+            Set the current data on the flow.
+        """
+        signals.flow_change.send(self, flow = self.flow)
diff --git a/mitmproxy/tools/console/grideditor/editors.py b/mitmproxy/tools/console/grideditor/editors.py
index e069fe2f..671e91fb 100644
--- a/mitmproxy/tools/console/grideditor/editors.py
+++ b/mitmproxy/tools/console/grideditor/editors.py
@@ -1,4 +1,3 @@
-import os
 import re
 
 import urwid
@@ -13,18 +12,24 @@ from mitmproxy.tools.console.grideditor import col_bytes
 from mitmproxy.tools.console.grideditor import col_subgrid
 from mitmproxy.tools.console import signals
 from mitmproxy.net.http import user_agents
+from mitmproxy.net.http import Headers
 
 
-class QueryEditor(base.GridEditor):
+class QueryEditor(base.FocusEditor):
     title = "Editing query"
     columns = [
         col_text.Column("Key"),
         col_text.Column("Value")
     ]
 
+    def get_data(self, flow):
+        return flow.request.query.items(multi=True)
 
-class HeaderEditor(base.GridEditor):
-    title = "Editing headers"
+    def set_data(self, vals, flow):
+        flow.request.query = vals
+
+
+class HeaderEditor(base.FocusEditor):
     columns = [
         col_bytes.Column("Key"),
         col_bytes.Column("Value")
@@ -65,35 +70,38 @@ class HeaderEditor(base.GridEditor):
             return True
 
 
-class URLEncodedFormEditor(base.GridEditor):
+class RequestHeaderEditor(HeaderEditor):
+    title = "Editing request headers"
+
+    def get_data(self, flow):
+        return flow.request.headers.fields
+
+    def set_data(self, vals, flow):
+        flow.request.headers = Headers(vals)
+
+
+class ResponseHeaderEditor(HeaderEditor):
+    title = "Editing response headers"
+
+    def get_data(self, flow):
+        return flow.response.headers.fields
+
+    def set_data(self, vals, flow):
+        flow.response.headers = Headers(vals)
+
+
+class RequestFormEditor(base.FocusEditor):
     title = "Editing URL-encoded form"
     columns = [
         col_text.Column("Key"),
         col_text.Column("Value")
     ]
 
+    def get_data(self, flow):
+        return flow.request.urlencoded_form.items(multi=True)
 
-class ReplaceEditor(base.GridEditor):
-    title = "Editing replacement patterns"
-    columns = [
-        col_text.Column("Filter"),
-        col_text.Column("Regex"),
-        col_text.Column("Replacement"),
-    ]
-
-    def is_error(self, col, val):
-        if col == 0:
-            if not flowfilter.parse(val):
-                return "Invalid filter specification."
-        elif col == 1:
-            try:
-                re.compile(val)
-            except re.error:
-                return "Invalid regular expression."
-        elif col == 2:
-            if val.startswith("@") and not os.path.isfile(os.path.expanduser(val[1:])):
-                return "Invalid file path"
-        return False
+    def set_data(self, vals, flow):
+        flow.request.urlencoded_form = vals
 
 
 class SetHeadersEditor(base.GridEditor):
@@ -146,7 +154,7 @@ class SetHeadersEditor(base.GridEditor):
             return True
 
 
-class PathEditor(base.GridEditor):
+class PathEditor(base.FocusEditor):
     # TODO: Next row on enter?
 
     title = "Editing URL path components"
@@ -160,6 +168,12 @@ class PathEditor(base.GridEditor):
     def data_out(self, data):
         return [i[0] for i in data]
 
+    def get_data(self, flow):
+        return self.data_in(flow.request.path_components)
+
+    def set_data(self, vals, flow):
+        flow.request.path_components = self.data_out(vals)
+
 
 class ScriptEditor(base.GridEditor):
     title = "Editing scripts"
@@ -193,13 +207,19 @@ class HostPatternEditor(base.GridEditor):
         return [i[0] for i in data]
 
 
-class CookieEditor(base.GridEditor):
+class CookieEditor(base.FocusEditor):
     title = "Editing request Cookie header"
     columns = [
         col_text.Column("Name"),
         col_text.Column("Value"),
     ]
 
+    def get_data(self, flow):
+        return flow.request.cookies.items(multi=True)
+
+    def set_data(self, vals, flow):
+        flow.request.cookies = vals
+
 
 class CookieAttributeEditor(base.GridEditor):
     title = "Editing Set-Cookie attributes"
@@ -221,7 +241,7 @@ class CookieAttributeEditor(base.GridEditor):
         return ret
 
 
-class SetCookieEditor(base.GridEditor):
+class SetCookieEditor(base.FocusEditor):
     title = "Editing response SetCookie header"
     columns = [
         col_text.Column("Name"),
@@ -246,6 +266,12 @@ class SetCookieEditor(base.GridEditor):
             )
         return vals
 
+    def get_data(self, flow):
+        return self.data_in(flow.response.cookies.items(multi=True))
+
+    def set_data(self, vals, flow):
+        flow.response.cookies = self.data_out(vals)
+
 
 class OptionsEditor(base.GridEditor):
     title = None  # type: str
diff --git a/mitmproxy/tools/console/help.py b/mitmproxy/tools/console/help.py
index 282f374d..33418624 100644
--- a/mitmproxy/tools/console/help.py
+++ b/mitmproxy/tools/console/help.py
@@ -15,6 +15,7 @@ footer = [
 
 
 class HelpView(urwid.ListBox):
+    keyctx = "help"
 
     def __init__(self, help_context):
         self.help_context = help_context or []
diff --git a/mitmproxy/tools/console/master.py b/mitmproxy/tools/console/master.py
index 5b6d9bcb..b2208c05 100644
--- a/mitmproxy/tools/console/master.py
+++ b/mitmproxy/tools/console/master.py
@@ -22,13 +22,8 @@ from mitmproxy import flow
 from mitmproxy.addons import intercept
 from mitmproxy.addons import readfile
 from mitmproxy.addons import view
-from mitmproxy.tools.console import flowlist
-from mitmproxy.tools.console import flowview
 from mitmproxy.tools.console import grideditor
-from mitmproxy.tools.console import help
 from mitmproxy.tools.console import keymap
-from mitmproxy.tools.console import options
-from mitmproxy.tools.console import commands
 from mitmproxy.tools.console import overlay
 from mitmproxy.tools.console import palettes
 from mitmproxy.tools.console import signals
@@ -102,7 +97,7 @@ class ConsoleAddon:
             repl = repl.replace("{choice}", opt)
             self.master.commands.call(repl)
 
-        self.master.overlay(overlay.Chooser(choicecmd, choices, "", callback))
+        self.master.overlay(overlay.Chooser(prompt, choices, "", callback))
         ctx.log.info(choices)
 
     @command.command("console.command")
@@ -147,6 +142,38 @@ class ConsoleAddon:
         """
         signals.pop_view_state.send(self)
 
+    @command.command("console.edit.focus.options")
+    def edit_focus_options(self) -> typing.Sequence[str]:
+        return [
+            "cookies",
+            "form",
+            "path",
+            "query",
+            "request-headers",
+            "response-headers",
+            "set-cookies",
+        ]
+
+    @command.command("console.edit.focus")
+    def edit_focus(self, part: str) -> None:
+        """
+            Edit the query of the current focus.
+        """
+        if part == "cookies":
+            self.master.switch_view("edit_focus_cookies")
+        elif part == "form":
+            self.master.switch_view("edit_focus_form")
+        elif part == "path":
+            self.master.switch_view("edit_focus_path")
+        elif part == "query":
+            self.master.switch_view("edit_focus_query")
+        elif part == "request-headers":
+            self.master.switch_view("edit_focus_request_headers")
+        elif part == "response-headers":
+            self.master.switch_view("edit_focus_response_headers")
+        elif part == "set-cookies":
+            self.master.switch_view("edit_focus_setcookies")
+
     def running(self):
         self.started = True
 
@@ -157,7 +184,7 @@ class ConsoleAddon:
     def configure(self, updated):
         if self.started:
             if "console_eventlog" in updated:
-                self.master.refresh_view()
+                pass
 
 
 def default_keymap(km):
@@ -213,6 +240,16 @@ def default_keymap(km):
     km.add("|", "console.command 'script.run @focus '", context="flowlist")
     km.add("enter", "console.view.flow @focus", context="flowlist")
 
+    km.add(
+        "t",
+        "console.choose Part console.edit.focus.options "
+        "console.edit.focus {choice}",
+        context="flowlist"
+    )
+
+    km.add(" ", "view.focus.next", context="flowview")
+    km.add("X", "console.edit.focus.query", context="flowview")
+
 
 class ConsoleMaster(master.Master):
 
@@ -232,9 +269,6 @@ class ConsoleMaster(master.Master):
         self.view_stack = []
 
         signals.call_in.connect(self.sig_call_in)
-        signals.pop_view_state.connect(self.sig_pop_view_state)
-        signals.replace_view_state.connect(self.sig_replace_view_state)
-        signals.push_view_state.connect(self.sig_push_view_state)
         signals.sig_add_log.connect(self.sig_add_log)
         self.addons.add(Logger())
         self.addons.add(*addons.default_addons())
@@ -251,6 +285,9 @@ class ConsoleMaster(master.Master):
 
         signal.signal(signal.SIGINT, sigint_handler)
 
+        self.ab = None
+        self.window = None
+
     def __setattr__(self, name, value):
         self.__dict__[name] = value
         signals.update_settings.send(self)
@@ -294,37 +331,6 @@ class ConsoleMaster(master.Master):
             return callback(*args)
         self.loop.set_alarm_in(seconds, cb)
 
-    def sig_replace_view_state(self, sender):
-        """
-            A view has been pushed onto the stack, and is intended to replace
-            the current view rather than creating a new stack entry.
-        """
-        if len(self.view_stack) > 1:
-            del self.view_stack[1]
-
-    def sig_pop_view_state(self, sender):
-        """
-            Pop the top view off the view stack. If no more views will be left
-            after this, prompt for exit.
-        """
-        if len(self.view_stack) > 1:
-            self.view_stack.pop()
-            self.loop.widget = self.view_stack[-1]
-        else:
-            self.prompt_for_exit()
-
-    def sig_push_view_state(self, sender, window):
-        """
-            Push a new view onto the view stack.
-        """
-        self.view_stack.append(window)
-        self.loop.widget = window
-        self.loop.draw_screen()
-
-    def refresh_view(self):
-        self.view_flowlist()
-        signals.replace_view_state.send(self)
-
     def spawn_editor(self, data):
         text = not isinstance(data, bytes)
         fd, name = tempfile.mkstemp('', "mproxy", text=text)
@@ -413,7 +419,10 @@ class ConsoleMaster(master.Master):
             screen = self.ui,
             handle_mouse = self.options.console_mouse,
         )
+
         self.ab = statusbar.ActionBar(self)
+        self.window = window.Window(self)
+        self.loop.widget = self.window
 
         self.loop.set_alarm_in(0.01, self.ticker)
         self.loop.set_alarm_in(
@@ -439,63 +448,25 @@ class ConsoleMaster(master.Master):
     def shutdown(self):
         raise urwid.ExitMainLoop
 
+    def sig_exit_overlay(self, *args, **kwargs):
+        self.loop.widget = self.window
+
     def overlay(self, widget, **kwargs):
-        signals.push_view_state.send(
-            self,
-            window = overlay.SimpleOverlay(
-                self,
-                widget,
-                self.loop.widget,
-                widget.width,
-                **kwargs
-            )
+        self.loop.widget = overlay.SimpleOverlay(
+            self, widget, self.loop.widget, widget.width, **kwargs
         )
 
+    def switch_view(self, name):
+        self.window.push(name)
+
     def view_help(self):
-        hc = self.view_stack[-1].helpctx
-        signals.push_view_state.send(
-            self,
-            window = window.Window(
-                self,
-                help.HelpView(hc),
-                None,
-                statusbar.StatusBar(self, help.footer),
-                None,
-                "help"
-            )
-        )
+        self.window.push("help")
 
     def view_options(self):
-        for i in self.view_stack:
-            if isinstance(i["body"], options.Options):
-                return
-        signals.push_view_state.send(
-            self,
-            window = window.Window(
-                self,
-                options.Options(self),
-                None,
-                statusbar.StatusBar(self, options.footer),
-                options.help_context,
-                "options"
-            )
-        )
+        self.window.push("options")
 
     def view_commands(self):
-        for i in self.view_stack:
-            if isinstance(i["body"], commands.Commands):
-                return
-        signals.push_view_state.send(
-            self,
-            window = window.Window(
-                self,
-                commands.Commands(self),
-                None,
-                statusbar.StatusBar(self, commands.footer),
-                commands.help_context,
-                "commands"
-            )
-        )
+        self.window.push("commands")
 
     def view_grideditor(self, ge):
         signals.push_view_state.send(
@@ -511,39 +482,10 @@ class ConsoleMaster(master.Master):
         )
 
     def view_flowlist(self):
-        if self.ui.started:
-            self.ui.clear()
-
-        if self.options.console_eventlog:
-            body = flowlist.BodyPile(self)
-        else:
-            body = flowlist.FlowListBox(self)
-
-        signals.push_view_state.send(
-            self,
-            window = window.Window(
-                self,
-                body,
-                None,
-                statusbar.StatusBar(self, flowlist.footer),
-                flowlist.help_context,
-                "flowlist"
-            )
-        )
+        self.window.push("flowlist")
 
     def view_flow(self, flow, tab_offset=0):
-        self.view.focus.flow = flow
-        signals.push_view_state.send(
-            self,
-            window = window.Window(
-                self,
-                flowview.FlowView(self, self.view, flow, tab_offset),
-                flowview.FlowViewHeader(self, flow),
-                statusbar.StatusBar(self, flowview.footer),
-                flowview.help_context,
-                "flowview"
-            )
-        )
+        self.window.push("flowview")
 
     def quit(self, a):
         if a != "n":
diff --git a/mitmproxy/tools/console/options.py b/mitmproxy/tools/console/options.py
index 64203f2b..68967f91 100644
--- a/mitmproxy/tools/console/options.py
+++ b/mitmproxy/tools/console/options.py
@@ -286,6 +286,8 @@ class OptionHelp(urwid.Frame):
 
 
 class Options(urwid.Pile):
+    keyctx = "options"
+
     def __init__(self, master):
         oh = OptionHelp(master)
         super().__init__(
diff --git a/mitmproxy/tools/console/overlay.py b/mitmproxy/tools/console/overlay.py
index e874da69..7e05fe81 100644
--- a/mitmproxy/tools/console/overlay.py
+++ b/mitmproxy/tools/console/overlay.py
@@ -84,7 +84,7 @@ class Chooser(urwid.WidgetWrap):
         self.choices = choices
         self.callback = callback
         choicewidth = max([len(i) for i in choices])
-        self.width = max(choicewidth, len(title) + 5)
+        self.width = max(choicewidth, len(title)) + 5
         self.walker = ChooserListWalker(choices, current)
         super().__init__(
             urwid.AttrWrap(
diff --git a/mitmproxy/tools/console/searchable.py b/mitmproxy/tools/console/searchable.py
index 55c5218a..bb19135f 100644
--- a/mitmproxy/tools/console/searchable.py
+++ b/mitmproxy/tools/console/searchable.py
@@ -16,10 +16,9 @@ class Highlight(urwid.AttrMap):
 
 class Searchable(urwid.ListBox):
 
-    def __init__(self, view, contents):
+    def __init__(self, contents):
         self.walker = urwid.SimpleFocusListWalker(contents)
         urwid.ListBox.__init__(self, self.walker)
-        self.view = view
         self.search_offset = 0
         self.current_highlight = None
         self.search_term = None
diff --git a/mitmproxy/tools/console/signals.py b/mitmproxy/tools/console/signals.py
index 91cb63b3..885cdbfb 100644
--- a/mitmproxy/tools/console/signals.py
+++ b/mitmproxy/tools/console/signals.py
@@ -48,4 +48,6 @@ flowlist_change = blinker.Signal()
 # Pop and push view state onto a stack
 pop_view_state = blinker.Signal()
 push_view_state = blinker.Signal()
-replace_view_state = blinker.Signal()
+
+# Exits overlay if there is one
+exit_overlay = blinker.Signal()
diff --git a/mitmproxy/tools/console/statusbar.py b/mitmproxy/tools/console/statusbar.py
index 8ded0cda..f1cc4fae 100644
--- a/mitmproxy/tools/console/statusbar.py
+++ b/mitmproxy/tools/console/statusbar.py
@@ -143,6 +143,7 @@ class ActionBar(urwid.WidgetWrap):
 
 
 class StatusBar(urwid.WidgetWrap):
+    keyctx = ""
 
     def __init__(
         self, master: "mitmproxy.tools.console.master.ConsoleMaster", helptext
diff --git a/mitmproxy/tools/console/tabs.py b/mitmproxy/tools/console/tabs.py
index a2d5e719..4f5f270a 100644
--- a/mitmproxy/tools/console/tabs.py
+++ b/mitmproxy/tools/console/tabs.py
@@ -27,6 +27,7 @@ class Tabs(urwid.WidgetWrap):
         self.tab_offset = tab_offset
         self.tabs = tabs
         self.show()
+        self._w = urwid.Pile([])
 
     def change_tab(self, offset):
         self.tab_offset = offset
@@ -41,6 +42,9 @@ class Tabs(urwid.WidgetWrap):
         return self._w.keypress(size, key)
 
     def show(self):
+        if not self.tabs:
+            return
+
         headers = []
         for i in range(len(self.tabs)):
             txt = self.tabs[i][0]()
diff --git a/mitmproxy/tools/console/window.py b/mitmproxy/tools/console/window.py
index ad972a66..7f04720b 100644
--- a/mitmproxy/tools/console/window.py
+++ b/mitmproxy/tools/console/window.py
@@ -1,22 +1,98 @@
 import urwid
-
 from mitmproxy.tools.console import signals
+from mitmproxy.tools.console import statusbar
+from mitmproxy.tools.console import flowlist
+from mitmproxy.tools.console import flowview
+from mitmproxy.tools.console import commands
+from mitmproxy.tools.console import options
+from mitmproxy.tools.console import overlay
+from mitmproxy.tools.console import help
+from mitmproxy.tools.console import grideditor
 
 
 class Window(urwid.Frame):
-
-    def __init__(self, master, body, header, footer, helpctx, keyctx):
-        urwid.Frame.__init__(
-            self,
-            urwid.AttrWrap(body, "background"),
-            header = urwid.AttrWrap(header, "background") if header else None,
-            footer = urwid.AttrWrap(footer, "background") if footer else None
+    def __init__(self, master):
+        super().__init__(
+            None,
+            header = None,
+            footer = statusbar.StatusBar(master, ""),
         )
         self.master = master
-        self.helpctx = helpctx
-        self.keyctx = keyctx
+        self.primary_stack = []
+        self.master.view.sig_view_refresh.connect(self.view_changed)
+        self.master.view.sig_view_add.connect(self.view_changed)
+        self.master.view.sig_view_remove.connect(self.view_changed)
+        self.master.view.sig_view_update.connect(self.view_changed)
+        self.master.view.focus.sig_change.connect(self.view_changed)
         signals.focus.connect(self.sig_focus)
 
+        self.master.view.focus.sig_change.connect(self.focus_changed)
+
+        signals.pop_view_state.connect(self.pop)
+        signals.push_view_state.connect(self.push)
+        self.windows = dict(
+            flowlist = flowlist.FlowListBox(self.master),
+            flowview = flowview.FlowView(self.master),
+            commands = commands.Commands(self.master),
+            options = options.Options(self.master),
+            help = help.HelpView(None),
+            edit_focus_query = grideditor.QueryEditor(self.master),
+            edit_focus_cookies = grideditor.CookieEditor(self.master),
+            edit_focus_setcookies = grideditor.SetCookieEditor(self.master),
+            edit_focus_form = grideditor.RequestFormEditor(self.master),
+            edit_focus_path = grideditor.PathEditor(self.master),
+            edit_focus_request_headers = grideditor.RequestHeaderEditor(self.master),
+            edit_focus_response_headers = grideditor.ResponseHeaderEditor(self.master),
+        )
+
+    def call(self, v, name, *args, **kwargs):
+        f = getattr(v, name, None)
+        if f:
+            f(*args, **kwargs)
+
+    def focus_changed(self, *args, **kwargs):
+        """
+            Triggered when the focus changes - either when it's modified, or
+            when it changes to a different flow altogether.
+        """
+        self.call(self.focus, "focus_changed")
+
+    def view_changed(self, *args, **kwargs):
+        """
+            Triggered when the view list has changed.
+        """
+        self.call(self.focus, "view_changed")
+
+    def view_popping(self, *args, **kwargs):
+        """
+            Triggered when the view list has changed.
+        """
+        self.call(self.focus, "view_popping")
+
+    def push(self, wname):
+        self.primary_stack.append(wname)
+        self.body = urwid.AttrWrap(
+            self.windows[wname], "background"
+        )
+        self.view_changed()
+        self.focus_changed()
+
+    def pop(self, *args, **kwargs):
+        if isinstance(self.master.loop.widget, overlay.SimpleOverlay):
+            self.master.loop.widget = self
+        else:
+            if len(self.primary_stack) > 1:
+                self.view_popping()
+                self.primary_stack.pop()
+                self.body = urwid.AttrWrap(
+                    self.windows[self.primary_stack[-1]],
+                    "background",
+                )
+                self.view_changed()
+                self.focus_changed()
+            else:
+                self.master.prompt_for_exit()
+
     def sig_focus(self, sender, section):
         self.focus_position = section
 
@@ -37,50 +113,8 @@ class Window(urwid.Frame):
                 return False
             return True
 
-    def handle_replay(self, k):
-        if k == "c":
-            creplay = self.master.addons.get("clientplayback")
-            if self.master.options.client_replay and creplay.count():
-                def stop_client_playback_prompt(a):
-                    if a != "n":
-                        self.master.options.client_replay = None
-                signals.status_prompt_onekey.send(
-                    self,
-                    prompt = "Stop current client replay?",
-                    keys = (
-                        ("yes", "y"),
-                        ("no", "n"),
-                    ),
-                    callback = stop_client_playback_prompt
-                )
-            else:
-                signals.status_prompt_path.send(
-                    self,
-                    prompt = "Client replay path",
-                    callback = lambda x: self.master.options.setter("client_replay")([x])
-                )
-        elif k == "s":
-            a = self.master.addons.get("serverplayback")
-            if a.count():
-                def stop_server_playback(response):
-                    if response == "y":
-                        self.master.options.server_replay = []
-                signals.status_prompt_onekey.send(
-                    self,
-                    prompt = "Stop current server replay?",
-                    keys = (
-                        ("yes", "y"),
-                        ("no", "n"),
-                    ),
-                    callback = stop_server_playback
-                )
-            else:
-                signals.status_prompt_path.send(
-                    self,
-                    prompt = "Server playback path",
-                    callback = lambda x: self.master.options.setter("server_replay")([x])
-                )
-
     def keypress(self, size, k):
-        k = super().keypress(size, k)
-        return self.master.keymap.handle(self.keyctx, k)
+        if self.focus.keyctx:
+            k = self.master.keymap.handle(self.focus.keyctx, k)
+        if k:
+            return super().keypress(size, k)
diff --git a/mitmproxy/tools/main.py b/mitmproxy/tools/main.py
index 9748f3cf..d8fac077 100644
--- a/mitmproxy/tools/main.py
+++ b/mitmproxy/tools/main.py
@@ -99,7 +99,7 @@ def run(MasterKlass, args, extra=None):  # pragma: no cover
     except exceptions.OptionsError as e:
         print("%s: %s" % (sys.argv[0], e), file=sys.stderr)
         sys.exit(1)
-    except (KeyboardInterrupt, RuntimeError):
+    except (KeyboardInterrupt, RuntimeError) as e:
         pass
     return master