feat(eckhart): full-screen PIN keyboard component

core/embed/rust/src/ui/layout_eckhart/component/keyboard/mod.rs

@@ -1,2 +1,4 @@
+pub mod pin;
+
 mod common;
 mod keypad;

core/embed/rust/src/ui/layout_eckhart/component/keyboard/pin.rs

@@ -0,0 +1,509 @@
+use crate::{
+    strutil::{ShortString, TString},
+    time::Duration,
+    ui::{
+        component::{
+            text::{
+                layout::{Chunks, LayoutFit, LineBreaking},
+                TextStyle,
+            },
+            Component, Event, EventCtx, Label, TextLayout, Timer,
+        },
+        display::Icon,
+        event::TouchEvent,
+        geometry::{Alignment, Alignment2D, Insets, Offset, Rect},
+        shape::{Bar, Renderer, Text, ToifImage},
+    },
+};
+
+use super::super::super::{
+    component::{
+        button::ButtonContent,
+        constant::SCREEN,
+        keyboard::{
+            common::{
+                DisplayStyle, FADING_ICON_COLORS, FADING_ICON_COUNT, INPUT_TOUCH_HEIGHT,
+                KEYBOARD_INPUT_INSETS, KEYBOARD_INPUT_RADIUS, KEYPAD_VISIBLE_HEIGHT,
+            },
+            keypad::{ButtonState, Keypad, KeypadMsg, KeypadState},
+        },
+    },
+    theme,
+};
+
+pub enum PinKeyboardMsg {
+    Confirmed,
+    Cancelled,
+}
+
+pub struct PinKeyboard<'a> {
+    allow_cancel: bool,
+    major_prompt: Label<'a>,
+    minor_prompt: Label<'a>,
+    major_warning: Option<Label<'a>>,
+    keypad: Keypad,
+    input: PinInput,
+    warning_timer: Timer,
+}
+
+impl<'a> PinKeyboard<'a> {
+    const LAST_DIGIT_TIMEOUT_S: u32 = 1;
+
+    pub fn new(
+        major_prompt: TString<'a>,
+        minor_prompt: TString<'a>,
+        major_warning: Option<TString<'a>>,
+        allow_cancel: bool,
+    ) -> Self {
+        Self {
+            allow_cancel,
+            major_prompt: Label::left_aligned(major_prompt, theme::TEXT_SMALL)
+                .vertically_centered(),
+            minor_prompt: Label::right_aligned(minor_prompt, theme::TEXT_SMALL)
+                .vertically_centered(),
+            major_warning: major_warning
+                .map(|text| Label::left_aligned(text, theme::TEXT_SMALL).vertically_centered()),
+            input: PinInput::new(theme::TEXT_MONO_LIGHT),
+            keypad: Keypad::new_numeric(true),
+            warning_timer: Timer::new(),
+        }
+    }
+
+    fn update_keypad_state(&mut self, ctx: &mut EventCtx) {
+        let keypad_state = match self.input.display_style {
+            DisplayStyle::Shown => {
+                // Disable the entire active keypad
+                KeypadState {
+                    back: ButtonState::Hidden,
+                    erase: ButtonState::Disabled,
+                    cancel: ButtonState::Hidden,
+                    confirm: ButtonState::Disabled,
+                    keys: ButtonState::Disabled,
+                }
+            }
+            _ => {
+                if self.input.is_full() {
+                    // Disable all except of confirm and erase buttons
+                    KeypadState {
+                        back: ButtonState::Hidden,
+                        erase: ButtonState::Enabled,
+                        cancel: ButtonState::Hidden,
+                        confirm: ButtonState::Enabled,
+                        keys: ButtonState::Disabled,
+                    }
+                } else if self.input.is_empty() {
+                    KeypadState {
+                        back: ButtonState::Hidden,
+                        erase: ButtonState::Hidden,
+                        cancel: if self.allow_cancel {
+                            ButtonState::Enabled
+                        } else {
+                            ButtonState::Hidden
+                        },
+                        confirm: ButtonState::Hidden,
+                        keys: ButtonState::Enabled,
+                    }
+                } else {
+                    KeypadState {
+                        back: ButtonState::Hidden,
+                        erase: ButtonState::Enabled,
+                        cancel: ButtonState::Hidden,
+                        confirm: ButtonState::Enabled,
+                        keys: ButtonState::Enabled,
+                    }
+                }
+            }
+        };
+        // Apply all button states
+        self.keypad.set_state(keypad_state, ctx);
+    }
+
+    pub fn pin(&self) -> &str {
+        self.input.pin()
+    }
+}
+
+impl Component for PinKeyboard<'_> {
+    type Msg = PinKeyboardMsg;
+
+    fn place(&mut self, bounds: Rect) -> Rect {
+        // assert full screen
+        debug_assert_eq!(bounds.height(), SCREEN.height());
+        debug_assert_eq!(bounds.width(), SCREEN.width());
+
+        // Keypad and input areas are overlapped
+        let (_, keypad_area) = bounds.split_bottom(KEYPAD_VISIBLE_HEIGHT);
+        let (input_touch_area, _) = bounds.split_top(INPUT_TOUCH_HEIGHT);
+
+        // Prompts and PIN dots placement.
+        self.input.place(input_touch_area);
+        self.major_prompt
+            .place(input_touch_area.inset(KEYBOARD_INPUT_INSETS));
+        self.minor_prompt
+            .place(input_touch_area.inset(KEYBOARD_INPUT_INSETS));
+        self.major_warning
+            .as_mut()
+            .map(|c| c.place(input_touch_area));
+
+        // Keypad placement
+        self.keypad.place(keypad_area);
+
+        bounds
+    }
+
+    fn event(&mut self, ctx: &mut EventCtx, event: Event) -> Option<Self::Msg> {
+        match event {
+            // Set up timer to switch off warning prompt.
+            Event::Attach(_) => {
+                if self.major_warning.is_some() {
+                    self.warning_timer.start(ctx, Duration::from_secs(2));
+                }
+                // Update the keypad state in the first event
+                self.update_keypad_state(ctx);
+            }
+            // Hide warning, show major prompt.
+            Event::Timer(_) if self.warning_timer.expire(event) => {
+                self.major_warning = None;
+            }
+
+            _ => {}
+        }
+
+        match self.keypad.event(ctx, event) {
+            Some(KeypadMsg::Key(idx)) => {
+                // Add new pin digit
+                if let ButtonContent::Text(text) = self.keypad.get_key_content(idx) {
+                    text.map(|text| {
+                        self.input.push(text);
+                    });
+                    // Start the timer to show the last digit.
+                    self.input
+                        .last_digit_timer
+                        .start(ctx, Duration::from_secs(Self::LAST_DIGIT_TIMEOUT_S));
+                    self.input.display_style = DisplayStyle::LastOnly;
+                    // Update the keypad state.
+                    self.update_keypad_state(ctx);
+                    return None;
+                }
+            }
+            Some(KeypadMsg::EraseShort) => {
+                // Erase pin digit
+                self.input.pop();
+                self.update_keypad_state(ctx);
+                return None;
+            }
+            Some(KeypadMsg::EraseLong) => {
+                // Clear the entire pin
+                self.input.clear();
+                self.update_keypad_state(ctx);
+                return None;
+            }
+            Some(KeypadMsg::Cancel) => {
+                return Some(PinKeyboardMsg::Cancelled);
+            }
+            Some(KeypadMsg::Confirm) => {
+                return Some(PinKeyboardMsg::Confirmed);
+            }
+            _ => {}
+        }
+
+        match self.input.event(ctx, event) {
+            Some(PinInputMsg::TouchStart) => {
+                // Disable keypad.
+                self.update_keypad_state(ctx);
+                return None;
+            }
+            Some(PinInputMsg::TouchEnd) => {
+                // Enable keypad.
+                self.update_keypad_state(ctx);
+                return None;
+            }
+            _ => {}
+        }
+
+        None
+    }
+
+    fn render<'s>(&'s self, target: &mut impl Renderer<'s>) {
+        let empty = self.input.is_empty();
+
+        // Render prompt when the pin is empty
+        if empty {
+            if let Some(ref w) = self.major_warning {
+                w.render(target);
+            } else {
+                self.major_prompt.render(target);
+            }
+            self.minor_prompt.render(target);
+        }
+
+        // When the entire pin is shown, the input area might overlap the keypad so it
+        // has to be rendered later
+        match self.input.display_style {
+            DisplayStyle::Shown if !empty => {
+                self.keypad.render(target);
+                self.input.render(target);
+            }
+            _ if !empty => {
+                self.input.render(target);
+                self.keypad.render(target);
+            }
+            _ => {
+                self.keypad.render(target);
+            }
+        }
+    }
+}
+
+#[derive(PartialEq, Debug, Copy, Clone)]
+#[cfg_attr(feature = "ui_debug", derive(ufmt::derive::uDebug))]
+pub enum PinInputMsg {
+    TouchStart,
+    TouchEnd,
+}
+
+struct PinInput {
+    area: Rect,
+    style: TextStyle,
+    digits: ShortString,
+    display_style: DisplayStyle,
+    last_digit_timer: Timer,
+    shown_area: Rect,
+}
+
+impl PinInput {
+    const MAX_LENGTH: usize = 50; // max length of the pin
+    const MAX_SHOWN_LEN: usize = 19; // max number of icons per line
+
+    const TWITCH: i16 = 4;
+    const SHOWN_PADDING: i16 = 24;
+    const SHOWN_STYLE: TextStyle = theme::TEXT_MEDIUM
+        .with_line_breaking(LineBreaking::BreakWordsNoHyphen)
+        .with_chunks(Chunks::new(1, 8));
+    const PIN_ICON: Icon = theme::ICON_DASH_VERTICAL;
+    const ICON_WIDTH: i16 = Self::PIN_ICON.toif.width();
+    const ICON_SPACE: i16 = 12;
+
+    fn new(style: TextStyle) -> Self {
+        Self {
+            area: Rect::zero(),
+            style,
+            digits: ShortString::new(),
+            display_style: DisplayStyle::Hidden,
+            last_digit_timer: Timer::new(),
+            shown_area: Rect::zero(),
+        }
+    }
+
+    fn size(&self) -> Offset {
+        let ndots = self.pin().len().min(Self::MAX_SHOWN_LEN);
+        let mut width = Self::ICON_WIDTH * (ndots as i16);
+        width += Self::ICON_SPACE * (ndots.saturating_sub(1) as i16);
+        Offset::new(width, 6)
+    }
+
+    fn is_empty(&self) -> bool {
+        self.digits.is_empty()
+    }
+
+    fn is_full(&self) -> bool {
+        self.digits.len() >= Self::MAX_LENGTH
+    }
+
+    fn clear(&mut self) {
+        self.digits.clear();
+    }
+
+    fn push(&mut self, text: &str) {
+        // This could happen only when `self.pin` is full and wasn't able to accept all
+        // of `text`
+        unwrap!(self.digits.push_str(text));
+    }
+
+    fn pop(&mut self) {
+        self.digits.pop();
+    }
+
+    fn pin(&self) -> &str {
+        &self.digits
+    }
+
+    fn update_shown_area(&mut self) {
+        // The area where the pin is shown
+        let mut shown_area = self.area.inset(KEYBOARD_INPUT_INSETS);
+
+        // Extend the shown area until the text fits
+        while let LayoutFit::OutOfBounds { .. } = TextLayout::new(Self::SHOWN_STYLE)
+            .with_align(Alignment::Start)
+            .with_bounds(shown_area.inset(Insets::uniform(Self::SHOWN_PADDING)))
+            .fit_text(self.pin())
+        {
+            shown_area = shown_area.outset(Insets::bottom(32));
+        }
+
+        self.shown_area = shown_area;
+    }
+
+    fn render_shown<'s>(&self, target: &mut impl Renderer<'s>) {
+        // Make sure the pin should be shown
+        debug_assert_eq!(self.display_style, DisplayStyle::Shown);
+
+        Bar::new(self.shown_area)
+            .with_bg(theme::GREY_SUPER_DARK)
+            .with_radius(KEYBOARD_INPUT_RADIUS)
+            .render(target);
+
+        TextLayout::new(Self::SHOWN_STYLE)
+            .with_bounds(self.shown_area.inset(Insets::uniform(Self::SHOWN_PADDING)))
+            .with_align(Alignment::Start)
+            .render_text(self.pin(), target);
+    }
+
+    fn render_hidden<'s>(&self, target: &mut impl Renderer<'s>) {
+        debug_assert_ne!(self.display_style, DisplayStyle::Shown);
+
+        let hidden_area: Rect = self.area.inset(KEYBOARD_INPUT_INSETS);
+        let style = theme::TEXT_MEDIUM;
+        let pin_len = self.pin().len();
+        let last_digit = self.display_style == DisplayStyle::LastOnly;
+
+        let mut cursor = self.size().snap(hidden_area.center(), Alignment2D::CENTER);
+
+        // Render only when there are characters
+        if pin_len > 0 {
+            // Number of visible icons + characters
+            let visible_len = pin_len.min(Self::MAX_SHOWN_LEN);
+            // Number of visible icons
+            let visible_icons = visible_len - last_digit as usize;
+
+            // Jiggle when overflowed.
+            if pin_len > visible_len
+                && pin_len % 2 == 0
+                && self.display_style != DisplayStyle::Shown
+            {
+                cursor.x += Self::TWITCH;
+            }
+
+            let mut char_idx = 0;
+
+            // Greyed out overflowing icons
+            for (i, &fg_color) in FADING_ICON_COLORS.iter().enumerate() {
+                if pin_len > visible_len + (FADING_ICON_COUNT - 1 - i) {
+                    ToifImage::new(cursor, Self::PIN_ICON.toif)
+                        .with_align(Alignment2D::TOP_LEFT)
+                        .with_fg(fg_color)
+                        .render(target);
+                    cursor.x += Self::ICON_SPACE + Self::ICON_WIDTH;
+                    char_idx += 1;
+                }
+            }
+
+            if visible_icons > 0 {
+                // Classical icons
+                for _ in char_idx..visible_icons {
+                    ToifImage::new(cursor, Self::PIN_ICON.toif)
+                        .with_align(Alignment2D::TOP_LEFT)
+                        .with_fg(style.text_color)
+                        .render(target);
+                    cursor.x += Self::ICON_SPACE + Self::ICON_WIDTH;
+                }
+            }
+
+            if last_digit {
+                // This should not fail because all_chars > 0
+                let last = &self.digits.as_str()[(pin_len - 1)..pin_len];
+
+                // Adapt a and y positions for the character
+                cursor.y = hidden_area.left_center().y + style.text_font.allcase_text_height() / 2;
+                cursor.x -= style.text_font.text_width(last) / 2 - Self::ICON_WIDTH / 2;
+
+                // Paint the last character
+                Text::new(cursor, last, style.text_font)
+                    .with_align(Alignment::Start)
+                    .with_fg(style.text_color)
+                    .render(target);
+            }
+        }
+    }
+}
+
+impl Component for PinInput {
+    type Msg = PinInputMsg;
+
+    fn place(&mut self, bounds: Rect) -> Rect {
+        self.area = bounds;
+        bounds
+    }
+
+    fn event(&mut self, ctx: &mut EventCtx, event: Event) -> Option<Self::Msg> {
+        // No touch events are handled when the input is empty
+        if self.is_empty() {
+            return None;
+        }
+
+        match event {
+            // Return touch start if the touch is detected inside the touchable area
+            Event::Touch(TouchEvent::TouchStart(pos)) if self.area.contains(pos) => {
+                // Stop the last char timer
+                self.last_digit_timer.stop();
+                // Show the entire pin on the touch start
+                self.display_style = DisplayStyle::Shown;
+                self.update_shown_area();
+                return Some(PinInputMsg::TouchStart);
+            }
+            // Return touch end if the touch end is detected inside the visible area
+            Event::Touch(TouchEvent::TouchEnd(pos))
+                if self.shown_area.contains(pos) && self.display_style == DisplayStyle::Shown =>
+            {
+                self.display_style = DisplayStyle::Hidden;
+                return Some(PinInputMsg::TouchEnd);
+            }
+            // Return touch end if the touch moves out of the visible area
+            Event::Touch(TouchEvent::TouchMove(pos))
+                if !self.shown_area.contains(pos) && self.display_style == DisplayStyle::Shown =>
+            {
+                self.display_style = DisplayStyle::Hidden;
+                return Some(PinInputMsg::TouchEnd);
+            }
+            // Timeout for showing the last digit.
+            Event::Timer(_) if self.last_digit_timer.expire(event) => {
+                // Hide the PIN
+                self.display_style = DisplayStyle::Hidden;
+                ctx.request_paint();
+            }
+            _ => {}
+        };
+        None
+    }
+
+    fn render<'s>(&'s self, target: &mut impl Renderer<'s>) {
+        if !self.digits.is_empty() {
+            match self.display_style {
+                DisplayStyle::Shown => self.render_shown(target),
+                _ => self.render_hidden(target),
+            }
+        }
+    }
+}
+
+#[cfg(feature = "ui_debug")]
+impl crate::trace::Trace for PinKeyboard<'_> {
+    fn trace(&self, t: &mut dyn crate::trace::Tracer) {
+        t.component("PinKeyboard");
+        // So that debuglink knows the locations of the buttons
+        let mut digits_order = ShortString::new();
+
+        for idx in 0..10 {
+            let btn_content = self.keypad.get_key_content(idx);
+            if let ButtonContent::Text(text) = btn_content {
+                text.map(|text| {
+                    unwrap!(digits_order.push_str(text));
+                });
+            }
+        }
+        let display_style = uformat!("{:?}", self.input.display_style);
+        t.string("digits_order", digits_order.as_str().into());
+        t.string("pin", self.input.pin().into());
+        t.string("display_style", display_style.as_str().into());
+    }
+}

core/embed/rust/src/ui/layout_eckhart/component/mod.rs

@@ -20,6 +20,8 @@ pub use error::ErrorScreen;
 pub use header::{Header, HeaderMsg};
 pub use hint::Hint;
 pub use hold_to_confirm::HoldToConfirmAnim;
+#[cfg(feature = "translations")]
+pub use keyboard::pin::{PinKeyboard, PinKeyboardMsg};
 pub use result::{ResultFooter, ResultScreen, ResultStyle};
 pub use select_word_screen::{SelectWordMsg, SelectWordScreen};
 #[cfg(feature = "translations")]

core/embed/rust/src/ui/layout_eckhart/component_msg_obj.rs

@@ -14,9 +14,19 @@ use crate::{
 };
 
 use super::component::{
-    AllowedTextContent, SelectWordMsg, SelectWordScreen, TextScreen, TextScreenMsg,
+    AllowedTextContent, PinKeyboard, PinKeyboardMsg, SelectWordMsg, SelectWordScreen, TextScreen,
+    TextScreenMsg,
 };
 
+impl ComponentMsgObj for PinKeyboard<'_> {
+    fn msg_try_into_obj(&self, msg: Self::Msg) -> Result<Obj, Error> {
+        match msg {
+            PinKeyboardMsg::Confirmed => self.pin().try_into(),
+            PinKeyboardMsg::Cancelled => Ok(CANCELLED.as_obj()),
+        }
+    }
+}
+
 // Clippy/compiler complains about conflicting implementations
 // TODO move the common impls to a common module
 #[cfg(not(feature = "clippy"))]

core/embed/rust/src/ui/layout_eckhart/ui_firmware.rs

@@ -24,7 +24,9 @@ use crate::{
 };
 
 use super::{
-    component::{ActionBar, Button, Header, HeaderMsg, Hint, SelectWordScreen, TextScreen},
+    component::{
+        ActionBar, Button, Header, HeaderMsg, Hint, PinKeyboard, SelectWordScreen, TextScreen,
+    },
     flow, fonts, theme, UIEckhart,
 };
 
@@ -373,12 +375,19 @@ impl FirmwareUI for UIEckhart {
     }
 
     fn request_pin(
-        _prompt: TString<'static>,
-        _subprompt: TString<'static>,
-        _allow_cancel: bool,
-        _warning: bool,
+        prompt: TString<'static>,
+        subprompt: TString<'static>,
+        allow_cancel: bool,
+        warning: bool,
     ) -> Result<impl LayoutMaybeTrace, Error> {
-        Err::<RootComponent<Empty, ModelUI>, Error>(Error::ValueError(c"not implemented"))
+        let warning = if warning {
+            Some(TR::pin__wrong_pin.into())
+        } else {
+            None
+        };
+
+        let layout = RootComponent::new(PinKeyboard::new(prompt, subprompt, warning, allow_cancel));
+        Ok(layout)
     }
 
     fn request_passphrase(