ui: properly taint child components

src/trezor/ui/confirm.py

@@ -66,6 +66,11 @@ class HoldToConfirmDialog(Widget):
         self.button = Button(ui.grid(4, n_x=1), hold, style=button_style)
         self.loader = Loader(style=loader_style)
 
+    def taint(self):
+        super().taint()
+        self.button.taint()
+        self.content.taint()
+
     def render(self):
         self.button.render()
 

src/trezor/ui/container.py

@@ -5,6 +5,11 @@ class Container(Widget):
     def __init__(self, *children):
         self.children = children
 
+    def taint(self):
+        super().taint()
+        for child in self.children:
+            child.taint()
+
     def render(self):
         for child in self.children:
             child.render()

src/trezor/ui/entry_select.py

@@ -14,6 +14,11 @@ class EntrySelector(Widget):
         self.device = Button(ui.grid(8, n_y=4, n_x=4, cells_x=4), "Device")
         self.host = Button(ui.grid(12, n_y=4, n_x=4, cells_x=4), "Host")
 
+    def taint(self):
+        super().taint()
+        self.device.taint()
+        self.host.taint()
+
     def render(self):
         self.device.render()
         self.host.render()

src/trezor/ui/mnemonic.py

@@ -89,6 +89,13 @@ class MnemonicKeyboard(ui.Widget):
         self.pbutton = None  # pending key button
         self.pindex = 0  # index of current pending char in pbutton
 
+    def taint(self):
+        super().taint()
+        self.input.taint()
+        self.back.taint()
+        for btn in self.keys:
+            btn.taint()
+
     def render(self):
         if self.input.content:
             # content button and backspace

src/trezor/ui/passphrase.py

@@ -81,19 +81,15 @@ class Input(Button):
             display.bar(tx + width + 1, ty - 18, 2, 22, fg_color)
 
 
-class Prompt:
+class Prompt(ui.Widget):
     def __init__(self, text):
         self.text = text
-        self.dirty = True
-
-    def taint(self):
-        self.dirty = True
 
     def render(self):
-        if self.dirty:
+        if self.tainted:
             display.bar(0, 0, ui.WIDTH, 48, ui.BG)
             display.text_center(ui.WIDTH // 2, 32, self.text, ui.BOLD, ui.GREY, ui.BG)
-            self.dirty = False
+            self.tainted = False
 
 
 CANCELLED = const(0)
@@ -110,6 +106,15 @@ class PassphraseKeyboard(ui.Widget):
         self.pbutton = None  # pending key button
         self.pindex = 0  # index of current pending char in pbutton
 
+    def taint(self):
+        super().taint()
+        self.prompt.taint()
+        self.input.taint()
+        self.back.taint()
+        self.done.taint()
+        for btn in self.keys:
+            btn.taint()
+
     def render(self):
         # passphrase or prompt
         if self.input.content:

src/trezor/ui/pin.py

@@ -34,6 +34,11 @@ class PinMatrix(ui.Widget):
         ]
         self.onchange = None
 
+    def taint(self):
+        super().taint()
+        for btn in self.pin_buttons:
+            btn.taint()
+
     def render(self):
         # pin matrix buttons
         for btn in self.pin_buttons:

src/trezor/ui/scroll.py

@@ -75,6 +75,10 @@ class Scrollpage(ui.Widget):
         self.page = page
         self.page_count = page_count
 
+    def taint(self):
+        super().taint()
+        self.content.taint()
+
     def render(self):
         self.content.render()
         render_scrollbar(self.page, self.page_count)

src/trezor/ui/text.py

@@ -121,7 +121,6 @@ class Text(ui.Widget):
         self.max_lines = max_lines
         self.new_lines = new_lines
         self.content = []
-        self.tainted = True
 
     def normal(self, *content):
         self.content.append(ui.NORMAL)
@@ -143,10 +142,13 @@ class Text(ui.Widget):
         self.content.append(BR)
 
     def render(self):
-        if not self.tainted:
-            return
-        ui.header(
-            self.header_text, self.header_icon, ui.TITLE_GREY, ui.BG, self.icon_color
-        )
-        render_text(self.content, self.new_lines, self.max_lines)
-        self.tainted = False
+        if self.tainted:
+            ui.header(
+                self.header_text,
+                self.header_icon,
+                ui.TITLE_GREY,
+                ui.BG,
+                self.icon_color,
+            )
+            render_text(self.content, self.new_lines, self.max_lines)
+            self.tainted = False

src/trezor/ui/word_select.py

@@ -26,6 +26,12 @@ class WordSelector(Widget):
             ui.grid(8, n_y=4, n_x=3, cells_y=2), str(_W24), style=ui.BTN_KEY
         )
 
+    def taint(self):
+        super().taint()
+        self.w12.taint()
+        self.w18.taint()
+        self.w24.taint()
+
     def render(self):
         self.w12.render()
         self.w18.render()