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147 lines
4.6 KiB
147 lines
4.6 KiB
from micropython import const
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from trezor import ui
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TEXT_HEADER_HEIGHT = const(48)
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TEXT_LINE_HEIGHT = const(26)
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TEXT_MARGIN_LEFT = const(14)
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TEXT_MAX_LINES = const(5)
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# needs to be different from all colors and font ids
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BR = const(-256)
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def render_text(words: list, new_lines: bool, max_lines: int) -> None:
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# initial rendering state
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font = ui.NORMAL
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fg = ui.FG
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bg = ui.BG
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offset_x = TEXT_MARGIN_LEFT
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offset_y = TEXT_HEADER_HEIGHT + TEXT_LINE_HEIGHT
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OFFSET_X_MAX = ui.WIDTH
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OFFSET_Y_MAX = TEXT_HEADER_HEIGHT + TEXT_LINE_HEIGHT * max_lines
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# sizes of common glyphs
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SPACE = ui.display.text_width(" ", font)
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DASH = ui.display.text_width("-", ui.BOLD)
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ELLIPSIS = ui.display.text_width("...", ui.BOLD)
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for word_index, word in enumerate(words):
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has_next_word = word_index < len(words) - 1
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if isinstance(word, int):
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if word == BR:
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# line break
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if offset_y >= OFFSET_Y_MAX:
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ui.display.text(offset_x, offset_y, "...", ui.BOLD, ui.GREY, bg)
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return
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offset_x = TEXT_MARGIN_LEFT
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offset_y += TEXT_LINE_HEIGHT
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elif word in [ui.NORMAL, ui.BOLD, ui.MONO, ui.MONO_BOLD]:
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# change of font style
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font = word
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else:
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# change of foreground color
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fg = word
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continue
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width = ui.display.text_width(word, font)
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while offset_x + width > OFFSET_X_MAX or (
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has_next_word and offset_y >= OFFSET_Y_MAX
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):
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beginning_of_line = offset_x == TEXT_MARGIN_LEFT
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word_fits_in_one_line = width < (OFFSET_X_MAX - TEXT_MARGIN_LEFT)
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if (
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offset_y < OFFSET_Y_MAX
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and word_fits_in_one_line
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and not beginning_of_line
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):
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# line break
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offset_x = TEXT_MARGIN_LEFT
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offset_y += TEXT_LINE_HEIGHT
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break
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# word split
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if offset_y < OFFSET_Y_MAX:
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split = "-"
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splitw = DASH
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else:
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split = "..."
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splitw = ELLIPSIS
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# find span that fits
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for index in range(len(word) - 1, 0, -1):
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letter = word[index]
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width -= ui.display.text_width(letter, font)
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if offset_x + width + splitw < OFFSET_X_MAX:
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break
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else:
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index = 0
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span = word[:index]
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# render word span
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ui.display.text(offset_x, offset_y, span, font, fg, bg)
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ui.display.text(offset_x + width, offset_y, split, ui.BOLD, ui.GREY, bg)
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# line break
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if offset_y >= OFFSET_Y_MAX:
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return
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offset_x = TEXT_MARGIN_LEFT
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offset_y += TEXT_LINE_HEIGHT
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# continue with the rest
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word = word[index:]
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width = ui.display.text_width(word, font)
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# render word
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ui.display.text(offset_x, offset_y, word, font, fg, bg)
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if new_lines and has_next_word:
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# line break
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if offset_y >= OFFSET_Y_MAX:
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ui.display.text(offset_x, offset_y, "...", ui.BOLD, ui.GREY, bg)
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return
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offset_x = TEXT_MARGIN_LEFT
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offset_y += TEXT_LINE_HEIGHT
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else:
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# shift cursor
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offset_x += width
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offset_x += SPACE
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class Text(ui.LazyWidget):
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def __init__(
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self,
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header_text: str,
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header_icon: str = ui.ICON_DEFAULT,
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icon_color: int = ui.ORANGE_ICON,
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max_lines: int = TEXT_MAX_LINES,
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new_lines: bool = True,
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):
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self.header_text = header_text
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self.header_icon = header_icon
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self.icon_color = icon_color
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self.max_lines = max_lines
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self.new_lines = new_lines
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self.content = []
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def normal(self, *content):
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self.content.extend(content)
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def bold(self, *content):
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self.content.append(ui.BOLD)
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self.content.extend(content)
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self.content.append(ui.NORMAL)
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def mono(self, *content):
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self.content.append(ui.MONO)
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self.content.extend(content)
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self.content.append(ui.NORMAL)
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def mono_bold(self, *content):
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self.content.append(ui.MONO_BOLD)
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self.content.extend(content)
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self.content.append(ui.NORMAL)
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def render(self):
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ui.header(
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self.header_text, self.header_icon, ui.TITLE_GREY, ui.BG, self.icon_color
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)
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render_text(self.content, self.new_lines, self.max_lines)
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