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60b4b6c9f0
This change adds support for `white-space-collapse: break-spaces` and adds initial parsing support for `overflow-wrap` and `word-break`. The later two properties are not fully supported, only in their interaction with `break-spaces`. This is a preliminary change preparing to implement them. In addition, `break_and_shape` is now forked and added to Layout 2020. This function is going to change a lot soon and forking is preparation for this. More code that is only used by Layout 2013 is moved from `gfx` to that crate. Co-authored-by: Rakhi Sharma <atbrakhi@igalia.com>
54 lines
2 KiB
Rust
54 lines
2 KiB
Rust
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at https://mozilla.org/MPL/2.0/. */
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use ucd::{Codepoint, UnicodeBlock};
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pub fn float_to_fixed(before: usize, f: f64) -> i32 {
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((1i32 << before) as f64 * f) as i32
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}
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pub fn fixed_to_float(before: usize, f: i32) -> f64 {
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f as f64 * 1.0f64 / ((1i32 << before) as f64)
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}
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pub fn is_bidi_control(c: char) -> bool {
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matches!(c, '\u{202A}'..='\u{202E}' | '\u{2066}'..='\u{2069}' | '\u{200E}' | '\u{200F}' | '\u{061C}')
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}
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pub fn unicode_plane(codepoint: char) -> u32 {
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(codepoint as u32) >> 16
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}
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pub fn is_cjk(codepoint: char) -> bool {
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if let Some(block) = codepoint.block() {
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match block {
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UnicodeBlock::CJKRadicalsSupplement |
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UnicodeBlock::KangxiRadicals |
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UnicodeBlock::IdeographicDescriptionCharacters |
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UnicodeBlock::CJKSymbolsandPunctuation |
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UnicodeBlock::Hiragana |
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UnicodeBlock::Katakana |
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UnicodeBlock::Bopomofo |
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UnicodeBlock::HangulCompatibilityJamo |
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UnicodeBlock::Kanbun |
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UnicodeBlock::BopomofoExtended |
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UnicodeBlock::CJKStrokes |
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UnicodeBlock::KatakanaPhoneticExtensions |
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UnicodeBlock::EnclosedCJKLettersandMonths |
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UnicodeBlock::CJKCompatibility |
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UnicodeBlock::CJKUnifiedIdeographsExtensionA |
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UnicodeBlock::YijingHexagramSymbols |
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UnicodeBlock::CJKUnifiedIdeographs |
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UnicodeBlock::CJKCompatibilityIdeographs |
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UnicodeBlock::CJKCompatibilityForms |
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UnicodeBlock::HalfwidthandFullwidthForms => return true,
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_ => {},
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}
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}
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// https://en.wikipedia.org/wiki/Plane_(Unicode)#Supplementary_Ideographic_Plane
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// https://en.wikipedia.org/wiki/Plane_(Unicode)#Tertiary_Ideographic_Plane
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unicode_plane(codepoint) == 2 || unicode_plane(codepoint) == 3
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}
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