use unicode_segmentation::UnicodeSegmentation;
pub mod grapheme_clusters;
pub mod line_break;
pub mod search;
pub mod tables;
pub mod types;
pub use types::Reflow;
pub mod wcwidth;
pub use grapheme_clusters::*;
pub use line_break::*;
pub use wcwidth::*;
pub trait Truncate {
fn truncate_at_boundary(&mut self, new_len: usize);
fn trim_at_boundary(&self, new_len: usize) -> &str;
fn trim_left_at_boundary(&self, new_len: usize) -> &str;
fn truncate_left_at_boundary(&mut self, new_len: usize);
}
impl Truncate for &str {
fn truncate_at_boundary(&mut self, new_len: usize) {
if new_len >= self.len() {
return;
}
if let Some((last, _)) = UnicodeSegmentation::grapheme_indices(*self, true)
.take(new_len)
.last()
{
*self = &self[..last];
}
}
fn trim_at_boundary(&self, new_len: usize) -> &str {
if new_len >= self.len() {
return self;
}
if let Some((last, _)) = UnicodeSegmentation::grapheme_indices(*self, true)
.take(new_len)
.last()
{
&self[..last]
} else {
self
}
}
fn trim_left_at_boundary(&self, skip_len: usize) -> &str {
if skip_len >= self.len() {
return "";
}
if let Some((first, _)) = UnicodeSegmentation::grapheme_indices(*self, true).nth(skip_len) {
&self[first..]
} else {
self
}
}
fn truncate_left_at_boundary(&mut self, skip_len: usize) {
if skip_len >= self.len() {
*self = "";
return;
}
if let Some((first, _)) = UnicodeSegmentation::grapheme_indices(*self, true).nth(skip_len) {
*self = &self[first..];
}
}
}
impl Truncate for String {
fn truncate_at_boundary(&mut self, new_len: usize) {
if new_len >= self.len() {
return;
}
if let Some((last, _)) = UnicodeSegmentation::grapheme_indices(self.as_str(), true)
.take(new_len)
.last()
{
Self::truncate(self, last);
}
}
fn trim_at_boundary(&self, new_len: usize) -> &str {
if new_len >= self.len() {
return self;
}
if let Some((last, _)) = UnicodeSegmentation::grapheme_indices(self.as_str(), true)
.take(new_len)
.last()
{
&self[..last]
} else {
self.as_str()
}
}
fn trim_left_at_boundary(&self, skip_len: usize) -> &str {
if skip_len >= self.len() {
return "";
}
if let Some((first, _)) =
UnicodeSegmentation::grapheme_indices(self.as_str(), true).nth(skip_len)
{
&self[first..]
} else {
self.as_str()
}
}
fn truncate_left_at_boundary(&mut self, skip_len: usize) {
if skip_len >= self.len() {
self.clear();
return;
}
if let Some((first, _)) =
UnicodeSegmentation::grapheme_indices(self.as_str(), true).nth(skip_len)
{
*self = self[first..].to_string();
}
}
}
pub mod hex {
use std::fmt::Write;
use crate::error::Result;
pub fn bytes_to_hex(bytes: &[u8]) -> Result<String> {
let mut retval = String::with_capacity(bytes.len() / 2 + bytes.len() / 4);
for (i, c) in bytes.chunks(2).enumerate() {
if i % 16 == 0 {
writeln!(&mut retval)?;
} else if i % 4 == 0 {
write!(&mut retval, " ")?;
}
if c.len() == 2 {
write!(&mut retval, "{:02x}{:02x}", c[0], c[1])?;
} else {
write!(&mut retval, "{:02x}", c[0])?;
}
}
Ok(retval)
}
}
pub trait TextPresentation {
fn text_pr(&self) -> std::borrow::Cow<'_, str>;
}
impl TextPresentation for str {
fn text_pr(&self) -> std::borrow::Cow<'_, str> {
use std::{borrow::Cow, str::FromStr};
let get_base_char = |grapheme: &Self| -> Option<char> {
char::from_str(grapheme.get(0..4).or_else(|| {
grapheme
.get(0..3)
.or_else(|| grapheme.get(0..2).or_else(|| grapheme.get(0..1)))
})?)
.ok()
};
let is_emoji = |base_char: char| -> bool {
[
0x2600..0x26FF, 0x2B00..0x2BFF, 0x1F300..0x1F5FF, 0x1F600..0x1F64F, 0x1F680..0x1F6FF, 0x2600..0x26FF, 0x2700..0x27BF, 0xFE00..0xFE0F, 0x1F900..0x1F9FF, 0x1F1E6..0x1F1FF, ]
.iter()
.any(|range| range.contains(&(base_char as u32)))
};
let graphemes = self.split_graphemes();
for g in &graphemes {
let Some(base_char) = get_base_char(g) else {
return Cow::from(self);
};
if is_emoji(base_char) {
let mut ret = String::with_capacity(self.len() + 1);
for g in &graphemes {
ret.push_str(g);
let Some(base_char) = get_base_char(g) else {
return Cow::from(self);
};
if is_emoji(base_char) {
ret.push('\u{FE0E}');
}
}
return Cow::from(ret);
}
}
Cow::from(self)
}
}
#[cfg(test)]
pub const _ALICE_CHAPTER_1: &str = r#"CHAPTER I. Down the Rabbit-Hole
Alice was beginning to get very tired of sitting by her sister on the
bank, and of having nothing to do: once or twice she had peeped into the
book her sister was reading, but it had no pictures or conversations in
it, ‘and what is the use of a book,’ thought Alice ‘without pictures or
conversations?’
So she was considering in her own mind (as well as she could, for the
hot day made her feel very sleepy and stupid), whether the pleasure
of making a daisy-chain would be worth the trouble of getting up and
picking the daisies, when suddenly a White Rabbit with pink eyes ran
close by her.
>>There was nothing so VERY remarkable in that; nor did Alice think it so
>>VERY much out of the way to hear the Rabbit say to itself, ‘Oh dear!
>> Oh dear! I shall be late!’ (when she thought it over afterwards, it
>>occurred to her that she ought to have wondered at this, but at the time
>>it all seemed quite natural); but when the Rabbit actually TOOK A WATCH
OUT OF ITS WAISTCOAT-POCKET, and looked at it, and then hurried on,
>>Alice started to her feet, for it flashed across her mind that she had
>>never before seen a rabbit with either a waistcoat-pocket, or a watch
>>to take out of it, and burning with curiosity, she ran across the field
after it, and fortunately was just in time to see it pop down a large
rabbit-hole under the hedge.
In another moment down went Alice after it, never once considering how
in the world she was to get out again.
The rabbit-hole went straight on like a tunnel for some way, and then
dipped suddenly down, so suddenly that Alice had not a moment to think
about stopping herself before she found herself falling down a very deep
well.
Either the well was very deep, or she fell very slowly, for she had
plenty of time as she went down to look about her and to wonder what was
going to happen next. First, she tried to look down and make out what
she was coming to, but it was too dark to see anything; then she
looked at the sides of the well, and noticed that they were filled with
cupboards and book-shelves; here and there she saw maps and pictures
hung upon pegs. She took down a jar from one of the shelves as
she passed; it was labelled ‘ORANGE MARMALADE’, but to her great
disappointment it was empty: she did not like to drop the jar for fear
of killing somebody, so managed to put it into one of the cupboards as
she fell past it.
‘Well!’ thought Alice to herself, ‘after such a fall as this, I shall
think nothing of tumbling down stairs! How brave they’ll all think me at
home! Why, I wouldn’t say anything about it, even if I fell off the top
of the house!’ (Which was very likely true.)"#;
#[test]
fn test_text_presentation() {
const TEST_CASES: &[(&str, &str)] = &[
(
"The Darkness Issue is now shipping worldwide 🦇",
"The Darkness Issue is now shipping worldwide 🦇︎",
),
("🐝 <user@example.com>", "🐝︎ <user@example.com>"),
(
"Happy Women's Day 🎀 - ΠΑΡΕ ΤΟ ΔΩΡΟ ΣΟΥ 🎁",
"Happy Women's Day 🎀︎ - ΠΑΡΕ ΤΟ ΔΩΡΟ ΣΟΥ 🎁︎",
),
(
"💨 Εσύ θα προλάβεις; 🔴 🐇 Καλό Πάσχα!",
"💨︎ Εσύ θα προλάβεις; 🔴︎ 🐇︎ Καλό Πάσχα!",
),
("Dream drop 💤", "Dream drop 💤︎"),
(
"⭐ Αξιολόγησε τον επαγγελματία! ⭐",
"⭐︎ Αξιολόγησε τον επαγγελματία! ⭐︎",
),
(
"🔓 MYSTERY UNLOCKED: 💀NEW💀 SIGNED VENTURE BROS. DVD SALE & MERCH RESTOCK",
"🔓︎ MYSTERY UNLOCKED: 💀︎NEW💀︎ SIGNED VENTURE BROS. DVD SALE & MERCH RESTOCK",
),
(
"[PATCH RFC 00/26] Multifd 🔀 device state transfer support with VFIO consumer",
"[PATCH RFC 00/26] Multifd 🔀︎ device state transfer support with VFIO consumer",
),
];
for (emoji, text) in TEST_CASES {
assert_eq!(&emoji.text_pr(), text);
}
}