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fixup! refactor(core): safe iface for get_glyph_data

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This commit is contained in:
obrusvit 2024-12-10 23:53:26 +01:00
parent cadcede0b7
commit 77b3d79e01
1 changed files with 29 additions and 18 deletions
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21
core/embed/rust/src/ui/display/font.rs
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@ -227,7 +227,12 @@ impl From<Font> for i32 {
impl Font {
/// Supports UTF8 characters
pub fn text_width(self, text: &str) -> i16 {
text.chars().fold(0, |acc, c| acc + self.char_width(c))
self.with_glyph_data(|data| {
text.chars().fold(0, |acc, c| {
let char_width = data.get_glyph(c).adv;
acc + char_width
})
})
}
/// Width of the text that is visible.
@ -350,8 +355,10 @@ impl Font {
pub fn longest_prefix(self, width: i16, text: &str) -> &str {
let mut prev_word_boundary = 0;
let mut text_width = 0;
self.with_glyph_data(|data| {
for (i, c) in text.char_indices() {
let c_width = self.char_width(c);
let char_width = data.get_glyph(c).adv;
let c_width = char_width;
if text_width + c_width > width {
// Another character would not fit => split at the previous word boundary
return &text[0..prev_word_boundary];
@ -361,6 +368,7 @@ impl Font {
}
text_width += c_width;
}
});
text // the whole text fits
}
@ -369,14 +377,17 @@ impl Font {
/// that will fit into the area `width` pixels wide.
pub fn longest_suffix(self, width: i16, text: &str) -> usize {
let mut text_width = 0;
self.with_glyph_data(|data| {
for (chars_from_right, c) in text.chars().rev().enumerate() {
let c_width = self.char_width(c);
if text_width + c_width > width {
let char_width = data.get_glyph(c).adv;
if text_width + char_width > width {
// Another character cannot be fitted, we're done.
return chars_from_right;
}
text_width += c_width;
text_width += char_width;
}
});
text.len() // it fits in its entirety
}