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Give a shell the whole phone, and one bar to leave it by

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A connected phone was drawing five rows of chrome around the thing the user
opened it for. The vault header at 56, the terminal's own tab strip at 52, a
connection line at 36, the shells strip at 46 and the four-entry bottom bar at
64: at 360dp that is about a third of the display, and every row of it was
about somewhere the user was not. What replaces them is one 52-pixel bar drawn
by the surface itself — back on the left, the session pills, and a `+` across
from them — and then the terminal.

Three of those rows belong to `PhoneShell` and each is now bound on
`IsShowingPages`. That is the same question asked once rather than three
conditions that could drift: the surface is either a page or a terminal, and
these are the chrome a page has. The header needed a wrapper because Avalonia's
bindings have no "and" and it already had a condition of its own; the strip
needed one for the same reason. The bottom bar had none and is bound directly.

The back arrow goes to the page the terminal was opened over rather than to
Hosts by name, because the system back gesture already picks that and an arrow
landing somewhere else would be the second of two answers to one question. The
bar's `+` raises a sheet offering the three connections this application can
make — a shell, a host's files over SFTP, a bucket — since SFTP and S3 used to
be two taps through the bottom bar's MORE and the bar is not on screen here. A
control that replaced it and led to one of the three would have quietly removed
the other two.

Two things moved rather than being dropped. The text-size buttons are pinned at
the right-hand end of the accessory key row, outside its scroller: the
connection line existed to keep them from scrolling out of reach, and being
outside the scroller answers that argument rather than abandoning it. The
dialled address moved onto the connecting card, which is the moment it is worth
reading — what is being connected to, before anything has answered — and after
that the shell's own prompt says it more accurately than a header derived from
the keychain ever did.

The sheet collapses the renderer rather than covering it. Whether Android's
`WebView` composites above Avalonia content the way Win32's child window does is
still unverified — `docs/android-port.md` has said so since the port — so this
follows the desktop's palette and gives up the rectangle outright, which is
correct under either answer. It collapses `IsTerminalShowing` and not
`IsTerminalSurface`, because the bar the sheet was raised from is part of that
surface and dropping it would take the bar, the tabs and the whole arrangement
with it, leaving the sheet floating over the page underneath.

`OnSurfaceChanged` is the one place the flag is lowered, and that is the load-
bearing half. Every way out of a terminal ends there — a destination, the files
screen, the palette connecting to a host, closing the last tab, a lock — and
each of them would otherwise leave a sheet set over a page. Not merely untidy:
the flag holds the renderer blank, so the next return to the terminal would
draw the menu again over a rectangle kept blank by it. Opening is refused off
the terminal surface for the same reason from the other direction.

The back gesture gains a guard above the switch, in the shape of the editor
guard that arrived with the phone's `+`. It is nearer than any of them: with no
header and no bottom bar, while the menu is up that gesture is the only way off
it other than the scrim and CANCEL.

The bottom bar's Terminal entry lost its `IsCurrent` binding. The bar is
collapsed on that surface, so the binding could only ever be read as false, and
a rule about a state the control cannot be in is a claim that it can.

Three tests in `ShellFlowTests`, which is where shared state-machine behaviour
for this head goes: the collapse and its recovery, the refusal to open over a
page, and the sheet lowering both by a menu entry and by a route it was never
wired to. Everything visual needs a device, so it is phase 11 of
`docs/manual-checks.md` — and 11.2 is the check that would finally settle the
compositing question this head has carried as unverified since the port.
This commit is contained in:
jaap-jan
2026-08-03 14:33:16 +02:00
parent ce86a4ff72
commit 80ae586fc4
9 changed files with 591 additions and 172 deletions
Download Patch File Download Diff File Expand all files Collapse all files
src/DodoSSH.Client.Android/Views/TerminalScreen.axaml
+237 -101
View File
@@ -16,113 +16,119 @@
The tab strip is horizontal-scrolling rather than wrapping. Wrapping would reflow the terminal every
time a tab opened, which is the one thing a terminal must not do while output is arriving.
── the screen a shell gets ───────────────────────────────────────────────────────────────────────────
A connected phone shows one bar and then the terminal. The vault header, the shells strip and the
four-entry bottom bar are all collapsed by PhoneShell while this surface is up, and what replaces them
is the row below: back, the sessions, and the way to open another one.
That is a trade, and the thing bought is the only one a terminal really wants. At 360dp the chrome this
screen used to sit inside came to 254 pixels of a roughly 780-pixel display — a third of it — and every
one of those rows was about somewhere the user was not. What is given up is the bottom bar's one-tap
reach to Hosts, Keychain and MORE; back and the + between them lead to all of it, and the system back
gesture does the same thing the arrow does.
-->
<Grid RowDefinitions="Auto,Auto,*,Auto">
<Panel>
<!-- ============ tabs ============ -->
<Grid RowDefinitions="Auto,*,Auto">
<!-- ============ the bar ============ -->
<!--
v2 draws these as pills rather than as a segmented strip, so the row is transparent and each session
carries its own outline. The close cross moved inside the pill with the name, which is what makes it
read as one object you can dismiss rather than as two adjacent targets.
-->
<Border Grid.Row="0" Height="52">
<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Disabled">
<ItemsControl ItemsSource="{Binding Tabs}" Margin="12,0" VerticalAlignment="Center">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate><StackPanel Orientation="Horizontal" Spacing="6" /></ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate x:DataType="vm:TerminalTabViewModel">
<!--
44 tall, where the session pills on the shell strip are 34. The difference is the close
cross: a pill you only select can be chip-sized, and a pill containing the control that ends
a shell cannot. This head's rule is 44 and this is the one control on the phone that is both
destructive and has no confirmation and no undo — see CloseTabAsync, which ends the session
the moment it is pressed.
-->
<Border Background="{StaticResource Panel}" BorderBrush="{StaticResource BorderMid}"
BorderThickness="1" CornerRadius="11" Height="44">
<StackPanel Orientation="Horizontal">
<Button Classes="row" MinHeight="42" Padding="13,0" CornerRadius="11"
Command="{Binding $parent[views:TerminalScreen].((vm:MainWindowViewModel)DataContext).SelectTabCommand}"
CommandParameter="{Binding}">
<StackPanel Orientation="Horizontal" Spacing="7" VerticalAlignment="Center">
<!-- Green only while there is a shell behind it; see the same dot in PhoneShell. -->
<Ellipse Classes="dot" Classes.live="{Binding IsLive}" Width="6" Height="6"
VerticalAlignment="Center" />
<TextBlock Classes="mono" FontSize="12" FontWeight="SemiBold"
Text="{Binding Label}" />
</StackPanel>
</Button>
<!--
The close cross is inside the tab, which the plan calls out: a strip-level close would
act on whichever tab happened to be selected, and on a phone that is a mis-tap away from
killing the wrong shell.
Everything the phone draws above a shell. It is a bar rather than a strip because it now carries the
two controls the collapsed chrome took with it, one at each end, with the sessions between them.
The hairline down its left edge is not decoration. The two targets are flush inside one
pill, so without a visible seam there is nothing telling a thumb where "switch to this
shell" stops and "end it" starts.
-->
<Button Classes="row" MinHeight="42" Width="44" Padding="0" CornerRadius="0,11,11,0"
HorizontalContentAlignment="Center"
BorderBrush="{StaticResource BorderMid}" BorderThickness="1,0,0,0"
Command="{Binding $parent[views:TerminalScreen].((vm:MainWindowViewModel)DataContext).CloseTabCommand}"
CommandParameter="{Binding}">
<TextBlock Text="×" Foreground="{StaticResource TextFaint}" FontSize="14" />
</Button>
</StackPanel>
</Border>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
</Border>
<!-- ============ the connection line ============ -->
<!--
The text-size buttons live here rather than in the accessory row below, and the row is the reason:
that one scrolls, so a key can be off-screen, and these two must not be — a terminal that is too
small to read is exactly the state in which hunting for the control that fixes it is worst.
A phone cannot press Ctrl+plus. The desktop head has that chord and needs no buttons; this head has
no keyboard to press it with, which is why the two heads differ here and nowhere else in this screen.
Both are outside the ScrollViewer deliberately. They are the way out of this surface and the way to
another host, and a tenth tab must not be able to push either of them off the right-hand edge.
-->
<!--
The design's line here also carries a round-trip time and a forwarded port. Neither is drawn: the SSH
library offers no RTT measurement, and nothing in this application forwards anything. What is left is
the one fact that is real and is the one that matters — the account and endpoint actually dialled.
-->
<Border Grid.Row="1" Padding="16,5" Height="36"
IsVisible="{Binding SelectedTab, Converter={x:Static ObjectConverters.IsNotNull}}">
<Grid ColumnDefinitions="*,Auto,Auto">
<TextBlock Grid.Column="0" Classes="detail" FontSize="10.5" TextTrimming="CharacterEllipsis"
Foreground="{StaticResource TextDim}"
VerticalAlignment="Center" Text="{Binding SelectedTab.Address}" />
<Border Grid.Row="0" Height="52" Background="{StaticResource Chrome}"
BorderBrush="{StaticResource Border}" BorderThickness="0,0,0,1">
<Grid ColumnDefinitions="Auto,*,Auto">
<!--
Disabled at the ends rather than clamping silently. A button that keeps accepting taps and does
nothing reads as the terminal having stopped responding, which is the one thing this screen must
never look like.
Back, and it goes to the page this terminal was opened over rather than to Hosts by name. The
system back gesture already does exactly that — see PhoneShell.axaml.cs — and an arrow that
landed somewhere else would be the second of two answers to one question.
-->
<Button Grid.Column="1" Classes="row" MinHeight="34" MinWidth="38" Padding="0"
HorizontalContentAlignment="Center"
Command="{Binding ShrinkTerminalFontCommand}"
IsEnabled="{Binding CanShrinkTerminalFont}">
<TextBlock Classes="mono" FontSize="13" Text="A−" />
</Button>
<Button Grid.Column="0" Classes="icon" Content="←" Margin="4,0,0,0"
Command="{Binding ShowScreenCommand}" CommandParameter="{Binding Screen}" />
<Button Grid.Column="2" Classes="row" MinHeight="34" MinWidth="38" Padding="0" Margin="4,0,0,0"
HorizontalContentAlignment="Center"
Command="{Binding EnlargeTerminalFontCommand}"
IsEnabled="{Binding CanEnlargeTerminalFont}">
<TextBlock Classes="mono" FontSize="15" Text="A+" />
</Button>
<!--
v2 draws these as pills rather than as a segmented strip, so the row is transparent and each
session carries its own outline. The close cross moved inside the pill with the name, which is
what makes it read as one object you can dismiss rather than as two adjacent targets.
-->
<ScrollViewer Grid.Column="1" HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Disabled">
<ItemsControl ItemsSource="{Binding Tabs}" Margin="6,0" VerticalAlignment="Center">
<ItemsControl.ItemsPanel>
<ItemsPanelTemplate><StackPanel Orientation="Horizontal" Spacing="6" /></ItemsPanelTemplate>
</ItemsControl.ItemsPanel>
<ItemsControl.ItemTemplate>
<DataTemplate x:DataType="vm:TerminalTabViewModel">
<!--
44 tall, where the session pills on the shell strip are 34. The difference is the close
cross: a pill you only select can be chip-sized, and a pill containing the control that ends
a shell cannot. This head's rule is 44 and this is the one control on the phone that is both
destructive and has no confirmation and no undo — see CloseTabAsync, which ends the session
the moment it is pressed.
-->
<Border Background="{StaticResource Panel}" BorderBrush="{StaticResource BorderMid}"
BorderThickness="1" CornerRadius="11" Height="44">
<StackPanel Orientation="Horizontal">
<Button Classes="row" MinHeight="42" Padding="13,0" CornerRadius="11"
Command="{Binding $parent[views:TerminalScreen].((vm:MainWindowViewModel)DataContext).SelectTabCommand}"
CommandParameter="{Binding}">
<StackPanel Orientation="Horizontal" Spacing="7" VerticalAlignment="Center">
<!-- Green only while there is a shell behind it; see the same dot in PhoneShell. -->
<Ellipse Classes="dot" Classes.live="{Binding IsLive}" Width="6" Height="6"
VerticalAlignment="Center" />
<TextBlock Classes="mono" FontSize="12" FontWeight="SemiBold"
Text="{Binding Label}" />
</StackPanel>
</Button>
<!--
The close cross is inside the tab, which the plan calls out: a strip-level close would
act on whichever tab happened to be selected, and on a phone that is a mis-tap away from
killing the wrong shell.
The hairline down its left edge is not decoration. The two targets are flush inside one
pill, so without a visible seam there is nothing telling a thumb where "switch to this
shell" stops and "end it" starts.
-->
<Button Classes="row" MinHeight="42" Width="44" Padding="0" CornerRadius="0,11,11,0"
HorizontalContentAlignment="Center"
BorderBrush="{StaticResource BorderMid}" BorderThickness="1,0,0,0"
Command="{Binding $parent[views:TerminalScreen].((vm:MainWindowViewModel)DataContext).CloseTabCommand}"
CommandParameter="{Binding}">
<TextBlock Text="×" Foreground="{StaticResource TextFaint}" FontSize="14" />
</Button>
</StackPanel>
</Border>
</DataTemplate>
</ItemsControl.ItemTemplate>
</ItemsControl>
</ScrollViewer>
<!--
Another connection, and the three kinds this application can make. A menu rather than a straight
jump to Hosts because SFTP and S3 used to be two taps through the bottom bar's MORE, and the bar
is not on screen here — so the control that replaces it has to lead to all three or it has quietly
removed two of them.
The desktop's own + refuses a flyout on this reasoning, in TerminalTabs.axaml: a popup dropping
into the renderer's rectangle may or may not composite above a native child window, and that is
not a claim to make without a screenshot. It is answered here rather than dodged — this is a sheet
at the bottom of the screen and opening it collapses the renderer outright, exactly as the
palette does on the desktop. Nothing is drawn over the WebView.
-->
<Button Grid.Column="2" Classes="icon accent" Content="+" Margin="0,0,4,0"
Command="{Binding OpenConnectSheetCommand}" />
</Grid>
</Border>
<!-- ============ the renderer ============ -->
<Panel Grid.Row="2">
<Panel Grid.Row="1">
<!--
The empty state, and it says what the surface is for rather than that it is empty. A phone opens
@@ -131,7 +137,7 @@
<StackPanel IsVisible="{Binding !HasTabs}" VerticalAlignment="Center" Margin="24" Spacing="10">
<TextBlock Classes="title" FontSize="13" Text="NO SHELL OPEN" />
<TextBlock Classes="body"
Text="Choose a host and press CONNECT. A shell opened here keeps running while the app is in the background, and keeps running after the keychain is locked — a notification says so for as long as one is alive." />
Text="Press + above, or choose a host and press CONNECT. A shell opened here keeps running while the app is in the background, and keeps running after the keychain is locked — a notification says so for as long as one is alive." />
</StackPanel>
<!--
@@ -140,10 +146,17 @@
hold the application still any more, so there is a stretch in which a tab is selected and there is
nothing yet to render in it. A phone needs it more than a desktop does: mobile links are slower, and
the alternative is a black rectangle.
It carries the address, which is where that fact went when the connection line was folded into the
bar above. This is the moment it is worth reading — what is being dialled, before anything has
answered — and once a shell is open its own prompt says the same thing more accurately than a header
derived from the keychain ever did.
-->
<StackPanel IsVisible="{Binding IsConnectingShowing}" VerticalAlignment="Center" Margin="24"
Spacing="10">
<TextBlock Classes="title" FontSize="13" Text="{Binding SelectedTab.Label}" />
<TextBlock Classes="detail" FontSize="11" Foreground="{StaticResource TextDim}"
TextWrapping="Wrap" Text="{Binding SelectedTab.Address}" />
<TextBlock Classes="body" Text="{Binding SelectedTab.Status}" />
<Button Classes="row" MinHeight="44" Padding="14,0" HorizontalAlignment="Left"
Command="{Binding CloseTabCommand}" CommandParameter="{Binding SelectedTab}">
@@ -153,13 +166,14 @@
<!--
Collapsed rather than merely covered when there is no pane to show. On Windows this control is a
native child window that composites above everything Avalonia draws, which is why the desktop head
native child view that composites above everything Avalonia draws, which is why the desktop head
hides it explicitly; whether Android's WebView does the same is recorded as unverified in
docs/android-port.md. Hiding it either way costs nothing and is correct under both answers.
IsTerminalShowing rather than HasTabs, which are no longer the same question: a tab that is still
connecting has no pane, and showing the renderer for it would show the previous session's output
under the name of a machine nothing has connected to yet.
under the name of a machine nothing has connected to yet. It is also what the connect sheet turns
off — see MainWindowViewModel.IsTerminalShowing.
v2 insets this behind a 14-pixel radius. Not done, and not an oversight: this is a native child view
composited above everything Avalonia draws, so a rounded Border behind it clips nothing — the
@@ -178,13 +192,135 @@
then release, because holding a modifier while typing is not possible one-thumbed.
-->
<!-- Only with a pane to type into: the keys send bytes at a session, and a connecting tab has none. -->
<Border Grid.Row="3" IsVisible="{Binding IsTerminalShowing}" Height="50">
<ScrollViewer HorizontalScrollBarVisibility="Auto" VerticalScrollBarVisibility="Disabled">
<StackPanel x:Name="AccessoryKeys" Orientation="Horizontal" Spacing="5" Margin="12,0"
VerticalAlignment="Center" />
</ScrollViewer>
<Border Grid.Row="2" IsVisible="{Binding IsTerminalShowing}" Height="50">
<Grid ColumnDefinitions="*,Auto">
<ScrollViewer Grid.Column="0" HorizontalScrollBarVisibility="Auto"
VerticalScrollBarVisibility="Disabled">
<StackPanel x:Name="AccessoryKeys" Orientation="Horizontal" Spacing="5" Margin="12,0"
VerticalAlignment="Center" />
</ScrollViewer>
<!--
The text-size buttons, pinned at this row's right-hand end rather than scrolling with the keys
beside them.
They used to have a row of their own above the terminal, on the argument that the accessory row
scrolls and these two must never be off-screen — a terminal too small to read is exactly the state
in which hunting for the control that fixes it is worst. That argument is answered rather than
abandoned: outside the ScrollViewer they cannot scroll away, and the row they had costs 36 pixels
on a surface this change exists to give back.
A phone cannot press Ctrl+plus. The desktop head has that chord and needs no buttons; this head
has no keyboard to press it with, which is why the two heads differ here and nowhere else in this
screen.
Disabled at the ends rather than clamping silently. A button that keeps accepting taps and does
nothing reads as the terminal having stopped responding, which is the one thing this screen must
never look like.
-->
<StackPanel Grid.Column="1" Orientation="Horizontal" Spacing="5" Margin="8,0,12,0"
VerticalAlignment="Center">
<Border Width="1" Height="26" Background="{StaticResource Border}" Margin="0,0,3,0"
VerticalAlignment="Center" />
<Button Classes="row" MinHeight="38" Height="38" MinWidth="40" Padding="0" CornerRadius="9"
HorizontalContentAlignment="Center"
Background="{StaticResource Panel}" BorderBrush="{StaticResource BorderMid}"
BorderThickness="1"
Command="{Binding ShrinkTerminalFontCommand}"
IsEnabled="{Binding CanShrinkTerminalFont}">
<TextBlock Classes="mono" FontSize="13" Text="A−" />
</Button>
<Button Classes="row" MinHeight="38" Height="38" MinWidth="40" Padding="0" CornerRadius="9"
HorizontalContentAlignment="Center"
Background="{StaticResource Panel}" BorderBrush="{StaticResource BorderMid}"
BorderThickness="1"
Command="{Binding EnlargeTerminalFontCommand}"
IsEnabled="{Binding CanEnlargeTerminalFont}">
<TextBlock Classes="mono" FontSize="15" Text="A+" />
</Button>
</StackPanel>
</Grid>
</Border>
</Grid>
<!-- ============ the connect sheet ============ -->
<!--
Follows the add sheet on HostsScreen, which follows HostKeySheet: a scrim, a bottom-aligned panel with
the top two corners rounded, and a grab handle that is decoration. Dismissible, like the add sheet and
unlike the host-key one — "which kind of connection" has no wrong answer and no answer at all is one
of them.
It lives here rather than in PhoneShell for the reason the add sheet lives in its own screen: nothing
but this surface raises it. The scrim reaching only the screen area is not a compromise here the way
it was there — the bottom bar is collapsed while a terminal is showing, so the screen area is the
display.
Every row navigates away from the terminal. That is not a side effect of the menu, it is the menu:
each of the three destinations is a picker, and the shell they open lands back on this surface as a
new tab in the bar above.
-->
<Panel IsVisible="{Binding IsConnectSheetOpen}">
<!--
Declared before the sheet so the sheet draws over it: a Panel stacks its children in declaration
order. See the .scrim style for why a tap on it must not light anything up.
-->
<Button Classes="scrim" Command="{Binding CloseConnectSheetCommand}" />
<Border VerticalAlignment="Bottom" Background="{StaticResource Panel}"
BorderBrush="{StaticResource BorderMid}" BorderThickness="0,1,0,0"
CornerRadius="22,22,0,0" Padding="20,18,20,16">
<StackPanel Spacing="0">
<Border Width="38" Height="4" CornerRadius="2" Background="{StaticResource BorderMid}"
HorizontalAlignment="Center" Margin="0,0,0,16" />
<TextBlock Classes="title" Text="CONNECT" FontSize="13" />
<Button Classes="row" Margin="0,10,0,0" Command="{Binding ShowScreenCommand}"
CommandParameter="{x:Static vm:ShellScreen.Hosts}">
<StackPanel Spacing="3" VerticalAlignment="Center">
<TextBlock Classes="mono" FontSize="13.5" FontWeight="SemiBold" Text="Connect" />
<TextBlock Classes="detail" FontSize="10.5"
Text="Another shell, on this host or any other in the keychain." />
</StackPanel>
</Button>
<!--
These two go through ShowFiles rather than ShowScreen, as the MORE hub's own rows do: one screen
over one view model, and which kind of remote it offers is the thing being chosen. It can refuse
— there is a single transfer session behind both — and refusing lands on the screen the open one
belongs to with a sentence saying why, which is a better place to read it than a sheet that has
just closed.
-->
<Button Classes="row" Command="{Binding ShowFilesCommand}"
CommandParameter="{x:Static vm:RemoteKind.Host}">
<StackPanel Spacing="3" VerticalAlignment="Center">
<TextBlock Classes="mono" FontSize="13.5" FontWeight="SemiBold" Text="Connect via SFTP" />
<TextBlock Classes="detail" FontSize="10.5" Text="Browse a host's files." />
</StackPanel>
</Button>
<Button Classes="row" Command="{Binding ShowFilesCommand}"
CommandParameter="{x:Static vm:RemoteKind.Bucket}">
<StackPanel Spacing="3" VerticalAlignment="Center">
<TextBlock Classes="mono" FontSize="13.5" FontWeight="SemiBold" Text="Connect via S3" />
<TextBlock Classes="detail" FontSize="10.5"
Text="Objects in an S3-compatible bucket from the keychain." />
</StackPanel>
</Button>
<Button Classes="secondary" Content="CANCEL" Margin="0,12,0,0"
Command="{Binding CloseConnectSheetCommand}" />
</StackPanel>
</Border>
</Panel>
</Panel>
</UserControl>