From 89d9a066f34b7cf0c249d9678afc101f17590a1e Mon Sep 17 00:00:00 2001
From: Lukas Bielesch <bielesch.lukas@gmail.com>
Date: Tue, 4 Mar 2025 16:51:51 +0100
Subject: [PATCH] feat(eckhart): full-screen QR screen component

---
 .../src/ui/layout_eckhart/firmware/mod.rs     |   2 +
 .../ui/layout_eckhart/firmware/qr_screen.rs   | 134 ++++++++++++++++++
 2 files changed, 136 insertions(+)
 create mode 100644 core/embed/rust/src/ui/layout_eckhart/firmware/qr_screen.rs

diff --git a/core/embed/rust/src/ui/layout_eckhart/firmware/mod.rs b/core/embed/rust/src/ui/layout_eckhart/firmware/mod.rs
index 15c428ef80..51b2a74fd3 100644
--- a/core/embed/rust/src/ui/layout_eckhart/firmware/mod.rs
+++ b/core/embed/rust/src/ui/layout_eckhart/firmware/mod.rs
@@ -4,6 +4,7 @@ mod hint;
 mod hold_to_confirm;
 mod keyboard;
 mod number_input_screen;
+mod qr_screen;
 mod select_word_screen;
 mod share_words;
 mod text_screen;
@@ -24,6 +25,7 @@ pub use keyboard::{
     word_count_screen::{SelectWordCountMsg, SelectWordCountScreen},
 };
 pub use number_input_screen::{NumberInputScreen, NumberInputScreenMsg};
+pub use qr_screen::{QrMsg, QrScreen};
 pub use select_word_screen::{SelectWordMsg, SelectWordScreen};
 #[cfg(feature = "translations")]
 pub use share_words::{ShareWordsScreen, ShareWordsScreenMsg};
diff --git a/core/embed/rust/src/ui/layout_eckhart/firmware/qr_screen.rs b/core/embed/rust/src/ui/layout_eckhart/firmware/qr_screen.rs
new file mode 100644
index 0000000000..edf75a1a5b
--- /dev/null
+++ b/core/embed/rust/src/ui/layout_eckhart/firmware/qr_screen.rs
@@ -0,0 +1,134 @@
+use crate::{
+    strutil::TString,
+    ui::{
+        component::{swipe_detect::SwipeConfig, Component, Event, EventCtx, Qr},
+        flow::Swipable,
+        geometry::{Insets, Rect},
+        shape::{self, Renderer},
+        util::Pager,
+    },
+};
+
+use super::super::{
+    firmware::{theme, ActionBar, Header, HeaderMsg},
+    constant::SCREEN,
+};
+
+pub enum QrMsg {
+    Cancelled,
+}
+
+pub struct QrScreen {
+    header: Header,
+    qr: Qr,
+    action_bar: Option<ActionBar>,
+    pad: Rect,
+}
+
+impl QrScreen {
+    const QR_PADDING: i16 = 8;
+    const QR_HEIGHT: i16 = 300;
+    const QR_PAD_RADIUS: i16 = 12;
+
+    pub fn new(qr: Qr) -> Self {
+        Self {
+            header: Header::new(TString::empty()),
+            qr,
+            action_bar: None,
+            pad: Rect::zero(),
+        }
+    }
+
+    pub fn with_header(mut self, header: Header) -> Self {
+        self.header = header;
+        self
+    }
+
+    pub fn with_action_bar(mut self, action_bar: ActionBar) -> Self {
+        self.action_bar = Some(action_bar);
+        self
+    }
+}
+
+impl Component for QrScreen {
+    type Msg = QrMsg;
+
+    fn place(&mut self, bounds: Rect) -> Rect {
+        // assert full screen
+        debug_assert_eq!(bounds.height(), SCREEN.height());
+        debug_assert_eq!(bounds.width(), SCREEN.width());
+
+        let (header_area, mut rest) = bounds.split_top(Header::HEADER_HEIGHT);
+        if let Some(action_bar) = &mut self.action_bar {
+            let action_bar_area;
+            (rest, action_bar_area) = rest.split_bottom(ActionBar::ACTION_BAR_HEIGHT);
+            action_bar.place(action_bar_area);
+        }
+        let (qr_pad, _) = rest.split_top(Self::QR_HEIGHT + 2 * Self::QR_PADDING);
+
+        let side_padding = (SCREEN.width() - Self::QR_HEIGHT - 2 * Self::QR_PADDING) / 2;
+        let qr_pad = qr_pad.inset(Insets::sides(side_padding));
+
+        self.pad = qr_pad;
+
+        self.header.place(header_area);
+        self.qr.place(qr_pad.shrink(Self::QR_PADDING));
+
+        bounds
+    }
+
+    fn event(&mut self, ctx: &mut EventCtx, event: Event) -> Option<Self::Msg> {
+        if let Some(HeaderMsg::Cancelled) = self.header.event(ctx, event) {
+            return Some(QrMsg::Cancelled);
+        }
+        None
+    }
+
+    fn render<'s>(&'s self, target: &mut impl Renderer<'s>) {
+        // Render white QR pad
+        shape::Bar::new(self.pad)
+            .with_bg(theme::FG)
+            .with_fg(theme::FG)
+            .with_radius(Self::QR_PAD_RADIUS)
+            .render(target);
+
+        self.header.render(target);
+        self.qr.render(target);
+        self.action_bar.render(target);
+    }
+}
+
+#[cfg(feature = "micropython")]
+impl Swipable for QrScreen {
+    fn get_swipe_config(&self) -> SwipeConfig {
+        SwipeConfig::new()
+    }
+
+    fn get_pager(&self) -> Pager {
+        Pager::single_page()
+    }
+}
+
+#[cfg(feature = "ui_debug")]
+impl crate::trace::Trace for QrScreen {
+    fn trace(&self, t: &mut dyn crate::trace::Tracer) {
+        t.component("QrScreen");
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::{super::super::constant::SCREEN, *};
+
+    #[test]
+    fn test_component_heights_fit_screen() {
+        assert!(
+            QrScreen::QR_HEIGHT
+                + 2 * QrScreen::QR_PADDING
+                + Header::HEADER_HEIGHT
+                + ActionBar::ACTION_BAR_HEIGHT
+                <= SCREEN.height(),
+            "Components overflow the screen height",
+        );
+    }
+}