mirror of
https://github.com/penpot/penpot.git
synced 2026-05-16 21:43:40 +00:00
1765 lines
58 KiB
Rust
1765 lines
58 KiB
Rust
use crate::render::text::calculate_decoration_metrics;
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use crate::{
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math::{Bounds, Matrix, Rect},
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render::{default_font, DEFAULT_EMOJI_FONT},
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utils::Browser,
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};
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use core::f32;
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use macros::ToJs;
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use skia_safe::textlayout::{RectHeightStyle, RectWidthStyle};
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use skia_safe::{
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self as skia,
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paint::{self, Paint},
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textlayout::Affinity,
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textlayout::ParagraphBuilder,
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textlayout::ParagraphStyle,
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textlayout::PositionWithAffinity,
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Contains,
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};
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use std::cell::Cell;
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use std::collections::HashSet;
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use super::FontFamily;
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use crate::math::Point;
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use crate::shapes::{self, merge_fills, Shape, VerticalAlign};
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use crate::utils::{get_fallback_fonts, get_font_collection};
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use crate::Uuid;
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// TODO: maybe move this to the wasm module?
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pub type ParagraphBuilderGroup = Vec<ParagraphBuilder>;
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#[repr(u8)]
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#[derive(Debug, PartialEq, Clone, Copy, ToJs)]
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pub enum GrowType {
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Fixed = 0,
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AutoWidth = 1,
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AutoHeight = 2,
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}
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#[derive(Debug, PartialEq, Copy, Clone)]
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pub struct TextContentSize {
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pub width: f32,
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pub height: f32,
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pub max_width: f32,
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pub normalized_line_height: f32,
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}
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const DEFAULT_TEXT_CONTENT_SIZE: f32 = 0.01;
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impl TextContentSize {
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pub fn default() -> Self {
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Self {
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width: DEFAULT_TEXT_CONTENT_SIZE,
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height: DEFAULT_TEXT_CONTENT_SIZE,
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max_width: DEFAULT_TEXT_CONTENT_SIZE,
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normalized_line_height: 0.0,
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}
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}
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pub fn new_with_size(width: f32, height: f32) -> Self {
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Self {
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width,
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height,
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max_width: DEFAULT_TEXT_CONTENT_SIZE,
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normalized_line_height: 0.0,
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}
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}
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pub fn new_with_normalized_line_height(
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width: f32,
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height: f32,
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max_width: f32,
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normalized_line_height: f32,
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) -> Self {
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Self {
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width,
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height,
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max_width,
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normalized_line_height,
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}
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}
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pub fn set_size(&mut self, width: f32, height: f32) {
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self.width = width;
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self.height = height;
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}
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pub fn copy_finite_size(
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&mut self,
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size: TextContentSize,
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default_height: f32,
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default_width: f32,
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) {
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if f32::is_finite(size.width) {
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self.width = size.width;
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} else {
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self.width = default_width;
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}
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if f32::is_finite(size.max_width) {
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self.max_width = size.max_width;
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} else {
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self.max_width = default_width
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}
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if f32::is_finite(size.height) {
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self.height = size.height;
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} else {
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self.height = default_height;
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}
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if f32::is_finite(size.normalized_line_height) {
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self.normalized_line_height = size.normalized_line_height;
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}
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}
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}
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#[derive(Debug, Clone, Copy, Default)]
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pub struct TextPositionWithAffinity {
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#[allow(dead_code)]
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pub position_with_affinity: PositionWithAffinity,
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pub paragraph: usize,
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pub offset: usize,
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}
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impl PartialEq for TextPositionWithAffinity {
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fn eq(&self, other: &Self) -> bool {
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self.paragraph == other.paragraph && self.offset == other.offset
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}
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}
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impl TextPositionWithAffinity {
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pub fn new(
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position_with_affinity: PositionWithAffinity,
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paragraph: usize,
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offset: usize,
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) -> Self {
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Self {
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position_with_affinity,
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paragraph,
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offset,
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}
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}
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pub fn empty() -> Self {
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Self {
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position_with_affinity: PositionWithAffinity {
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position: 0,
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affinity: Affinity::Downstream,
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},
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paragraph: 0,
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offset: 0,
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}
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}
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pub fn new_without_affinity(paragraph: usize, offset: usize) -> Self {
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Self {
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position_with_affinity: PositionWithAffinity {
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position: offset as i32,
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affinity: Affinity::Downstream,
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},
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paragraph,
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offset,
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}
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}
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pub fn reset(&mut self) {
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self.position_with_affinity.position = 0;
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self.position_with_affinity.affinity = Affinity::Downstream;
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self.paragraph = 0;
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self.offset = 0;
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}
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}
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#[derive(Debug)]
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pub struct TextContentLayoutResult(
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Vec<ParagraphBuilderGroup>,
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Vec<Vec<skia::textlayout::Paragraph>>,
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TextContentSize,
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);
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/// Cached extrect stored as offsets from the selrect origin,
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/// keyed by the selrect dimensions (width, height) and vertical alignment
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/// used to compute it.
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#[derive(Debug, Clone, Copy)]
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struct CachedExtrect {
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selrect_width: f32,
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selrect_height: f32,
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valign: u8,
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left: f32,
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top: f32,
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right: f32,
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bottom: f32,
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}
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#[derive(Debug)]
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pub struct TextContentLayout {
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pub paragraph_builders: Vec<ParagraphBuilderGroup>,
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pub paragraphs: Vec<Vec<skia::textlayout::Paragraph>>,
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cached_extrect: Cell<Option<CachedExtrect>>,
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}
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impl Default for TextContentLayout {
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fn default() -> Self {
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Self::new()
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}
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}
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impl Clone for TextContentLayout {
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fn clone(&self) -> Self {
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Self {
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paragraph_builders: vec![],
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paragraphs: vec![],
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cached_extrect: Cell::new(None),
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}
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}
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}
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impl PartialEq for TextContentLayout {
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fn eq(&self, _other: &Self) -> bool {
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true
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}
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}
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impl TextContentLayout {
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pub fn new() -> Self {
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Self {
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paragraph_builders: vec![],
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paragraphs: vec![],
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cached_extrect: Cell::new(None),
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}
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}
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pub fn set(
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&mut self,
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paragraph_builders: Vec<ParagraphBuilderGroup>,
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paragraphs: Vec<Vec<skia::textlayout::Paragraph>>,
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) {
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self.paragraph_builders = paragraph_builders;
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self.paragraphs = paragraphs;
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self.cached_extrect.set(None);
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}
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pub fn needs_update(&self) -> bool {
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self.paragraph_builders.is_empty() || self.paragraphs.is_empty()
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}
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}
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#[allow(dead_code)]
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#[derive(Debug, Clone)]
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pub struct TextDecorationSegment {
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pub kind: skia::textlayout::TextDecoration,
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pub text_style: skia::textlayout::TextStyle,
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pub y: f32,
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pub thickness: f32,
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pub left: f32,
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pub width: f32,
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}
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fn vertical_align_offset(container_h: f32, content_h: f32, valign: VerticalAlign) -> f32 {
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match valign {
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VerticalAlign::Center => (container_h - content_h) / 2.0,
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VerticalAlign::Bottom => container_h - content_h,
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_ => 0.0,
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}
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}
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fn intersects(paragraph: &skia_safe::textlayout::Paragraph, x: f32, y: f32) -> bool {
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if y < 0.0 || y > paragraph.height() {
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return false;
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}
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let pos = paragraph.get_glyph_position_at_coordinate((x, y));
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let idx = pos.position as usize;
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let rects =
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paragraph.get_rects_for_range(0..idx + 1, RectHeightStyle::Tight, RectWidthStyle::Tight);
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rects.iter().any(|r| r.rect.contains(&Point::new(x, y)))
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}
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fn paragraph_intersects<'a>(
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paragraphs: impl Iterator<Item = &'a skia::textlayout::Paragraph>,
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x_pos: f32,
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y_pos: f32,
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) -> bool {
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paragraphs
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.scan(0.0_f32, |height, p| {
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let prev_height = *height;
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*height += p.height();
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Some((prev_height, p))
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})
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.any(|(height, p)| intersects(p, x_pos, y_pos - height))
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}
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// Performs a text auto layout without width limits.
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// This should be the same as text_auto_layout.
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pub fn build_paragraphs_from_paragraph_builders(
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paragraph_builders: &mut [ParagraphBuilderGroup],
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width: f32,
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) -> Vec<Vec<skia::textlayout::Paragraph>> {
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let paragraphs = paragraph_builders
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.iter_mut()
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.map(|builders| {
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builders
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.iter_mut()
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.map(|builder| {
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let mut paragraph = builder.build();
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// For auto-width, always layout with infinite width first to get intrinsic width
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paragraph.layout(width);
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paragraph
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})
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.collect()
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})
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.collect();
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paragraphs
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}
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/// Calculate the normalized line height from paragraph builders
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pub fn calculate_normalized_line_height(
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paragraph_builders: &mut [ParagraphBuilderGroup],
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width: f32,
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) -> f32 {
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let mut normalized_line_height = 0.0;
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for paragraph_builder_group in paragraph_builders.iter_mut() {
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for paragraph_builder in paragraph_builder_group.iter_mut() {
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let mut paragraph = paragraph_builder.build();
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paragraph.layout(width);
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let baseline = paragraph.ideographic_baseline();
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if baseline > normalized_line_height {
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normalized_line_height = baseline;
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}
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}
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}
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normalized_line_height
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}
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#[derive(Debug, Clone)]
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pub struct TextContent {
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pub paragraphs: Vec<Paragraph>,
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pub bounds: Rect,
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pub grow_type: GrowType,
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pub size: TextContentSize,
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pub layout: TextContentLayout,
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content_version: u64,
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layout_version: u64,
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layout_width: Option<f32>,
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}
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impl PartialEq for TextContent {
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fn eq(&self, other: &Self) -> bool {
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self.paragraphs == other.paragraphs
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&& self.bounds == other.bounds
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&& self.grow_type == other.grow_type
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&& self.size == other.size
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&& self.layout == other.layout
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}
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}
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impl TextContent {
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pub fn new(bounds: Rect, grow_type: GrowType) -> Self {
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Self {
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paragraphs: Vec::new(),
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bounds,
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grow_type,
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size: TextContentSize::default(),
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layout: TextContentLayout::new(),
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content_version: 0,
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layout_version: 0,
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layout_width: None,
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}
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}
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pub fn new_bounds(&self, bounds: Rect) -> Self {
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let paragraphs = self.paragraphs.clone();
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let grow_type = self.grow_type;
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Self {
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paragraphs,
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bounds,
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grow_type,
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size: TextContentSize::new_with_size(bounds.width(), bounds.height()),
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layout: TextContentLayout::new(),
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content_version: 0,
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layout_version: 0,
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layout_width: None,
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}
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}
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pub fn bounds(&self) -> Rect {
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self.bounds
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}
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pub fn set_xywh(&mut self, x: f32, y: f32, w: f32, h: f32) {
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self.bounds = Rect::from_xywh(x, y, w, h);
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}
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#[allow(dead_code)]
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pub fn x(&self) -> f32 {
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self.bounds.x()
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}
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#[allow(dead_code)]
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pub fn y(&self) -> f32 {
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self.bounds.y()
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}
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pub fn add_paragraph(&mut self, paragraph: Paragraph) {
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self.paragraphs.push(paragraph);
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self.content_version = self.content_version.wrapping_add(1);
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}
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pub fn paragraphs(&self) -> &[Paragraph] {
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&self.paragraphs
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}
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pub fn paragraphs_mut(&mut self) -> &mut Vec<Paragraph> {
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self.content_version = self.content_version.wrapping_add(1);
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&mut self.paragraphs
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}
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pub fn width(&self) -> f32 {
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self.size.width
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}
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pub fn normalized_line_height(&self) -> f32 {
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self.size.normalized_line_height
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}
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pub fn grow_type(&self) -> GrowType {
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self.grow_type
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}
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pub fn set_grow_type(&mut self, grow_type: GrowType) {
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if self.grow_type != grow_type {
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self.grow_type = grow_type;
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self.content_version = self.content_version.wrapping_add(1);
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}
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}
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/// Compute a tight text rect from laid-out Skia paragraphs using glyph
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/// metrics (fm.top for overshoot, line descent for bottom, line left/width
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/// for horizontal extent).
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fn rect_from_paragraphs(&self, selrect: &Rect, valign: VerticalAlign) -> Option<Rect> {
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let paragraphs = &self.layout.paragraphs;
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let x = selrect.x();
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let base_y = selrect.y();
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let total_height: f32 = paragraphs
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.iter()
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.filter_map(|group| group.first())
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.map(|p| p.height())
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.sum();
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let vertical_offset = vertical_align_offset(selrect.height(), total_height, valign);
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let mut min_x = f32::MAX;
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let mut min_y = f32::MAX;
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let mut max_x = f32::MIN;
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let mut max_y = f32::MIN;
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let mut has_lines = false;
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let mut y_accum = base_y + vertical_offset;
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for group in paragraphs {
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if let Some(paragraph) = group.first() {
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let line_metrics = paragraph.get_line_metrics();
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for line in &line_metrics {
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let line_baseline = y_accum + line.baseline as f32;
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// Use per-glyph fm.top for tighter vertical bounds when
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// available; fall back to line-level ascent for empty lines
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// (where get_style_metrics returns nothing).
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let style_metrics = line.get_style_metrics(line.start_index..line.end_index);
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if style_metrics.is_empty() {
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min_y = min_y.min(line_baseline - line.ascent as f32);
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} else {
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for (_start, style_metric) in &style_metrics {
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let fm = &style_metric.font_metrics;
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min_y = min_y.min(line_baseline + fm.top);
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}
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}
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// Bottom uses line-level descent (includes descender space
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// for the whole line, not just present glyphs).
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max_y = max_y.max(line_baseline + line.descent as f32);
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min_x = min_x.min(x + line.left as f32);
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max_x = max_x.max(x + line.left as f32 + line.width as f32);
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has_lines = true;
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}
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y_accum += paragraph.height();
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}
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}
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if has_lines {
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Some(Rect::from_ltrb(min_x, min_y, max_x, max_y))
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} else {
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None
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}
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}
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|
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fn compute_and_cache_extrect(
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&self,
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shape: &Shape,
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selrect: &Rect,
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valign: VerticalAlign,
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) -> Rect {
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// AutoWidth paragraphs are laid out with f32::MAX, so line metrics
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// (line.left) reflect alignment within that huge width and are
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// unusable for tight bounds. Fall back to content_rect.
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if self.grow_type() == GrowType::AutoWidth {
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return self.content_rect(selrect, valign);
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}
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let tight = if !self.layout.paragraphs.is_empty() {
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self.rect_from_paragraphs(selrect, valign)
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} else {
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let mut text_content = self.clone();
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text_content.update_layout(shape.selrect);
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text_content.rect_from_paragraphs(selrect, valign)
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}
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.unwrap_or_else(|| self.content_rect(selrect, valign));
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// Cache as offsets from selrect origin so it's position-independent.
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let sx = selrect.x();
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let sy = selrect.y();
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self.layout.cached_extrect.set(Some(CachedExtrect {
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selrect_width: selrect.width(),
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selrect_height: selrect.height(),
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valign: valign as u8,
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left: tight.left() - sx,
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top: tight.top() - sy,
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right: tight.right() - sx,
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bottom: tight.bottom() - sy,
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}));
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tight
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}
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|
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pub fn calculate_bounds(&self, shape: &Shape, apply_transform: bool) -> Bounds {
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let transform = &shape.transform;
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let center = &shape.center();
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let selrect = shape.selrect();
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let valign = shape.vertical_align();
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let sw = selrect.width();
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let sh = selrect.height();
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let sx = selrect.x();
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let sy = selrect.y();
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|
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// Try the cache first: if dimensions and valign match, just apply position offset.
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let text_rect = if let Some(cached) = self.layout.cached_extrect.get() {
|
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if (cached.selrect_width - sw).abs() < 0.1
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&& (cached.selrect_height - sh).abs() < 0.1
|
|
&& cached.valign == valign as u8
|
|
{
|
|
Rect::from_ltrb(
|
|
sx + cached.left,
|
|
sy + cached.top,
|
|
sx + cached.right,
|
|
sy + cached.bottom,
|
|
)
|
|
} else {
|
|
self.compute_and_cache_extrect(shape, &selrect, valign)
|
|
}
|
|
} else {
|
|
self.compute_and_cache_extrect(shape, &selrect, valign)
|
|
};
|
|
|
|
let mut bounds = Bounds::new(
|
|
Point::new(text_rect.x(), text_rect.y()),
|
|
Point::new(text_rect.x() + text_rect.width(), text_rect.y()),
|
|
Point::new(
|
|
text_rect.x() + text_rect.width(),
|
|
text_rect.y() + text_rect.height(),
|
|
),
|
|
Point::new(text_rect.x(), text_rect.y() + text_rect.height()),
|
|
);
|
|
|
|
if apply_transform && !transform.is_identity() {
|
|
let mut matrix = *transform;
|
|
matrix.post_translate(*center);
|
|
matrix.pre_translate(-*center);
|
|
bounds.transform_mut(&matrix);
|
|
}
|
|
|
|
bounds
|
|
}
|
|
|
|
pub fn content_rect(&self, selrect: &Rect, valign: VerticalAlign) -> Rect {
|
|
let x = selrect.x();
|
|
let mut y = selrect.y();
|
|
|
|
let width = if self.grow_type() == GrowType::AutoWidth {
|
|
self.size.width
|
|
} else {
|
|
selrect.width()
|
|
};
|
|
|
|
let height = if self.size.width.round() != width.round() {
|
|
self.get_height(width)
|
|
} else {
|
|
self.size.height
|
|
};
|
|
|
|
let offset_y = vertical_align_offset(selrect.height(), height, valign);
|
|
y += offset_y;
|
|
|
|
Rect::from_xywh(x, y, width, height)
|
|
}
|
|
|
|
pub fn transform(&mut self, transform: &Matrix) {
|
|
let left = self.bounds.left();
|
|
let right = self.bounds.right();
|
|
let top = self.bounds.top();
|
|
let bottom = self.bounds.bottom();
|
|
let p1 = transform.map_point(skia::Point::new(left, top));
|
|
let p2 = transform.map_point(skia::Point::new(right, bottom));
|
|
self.bounds = Rect::from_ltrb(p1.x, p1.y, p2.x, p2.y);
|
|
}
|
|
|
|
pub fn get_caret_position_from_shape_coords(
|
|
&self,
|
|
point: &Point,
|
|
) -> Option<TextPositionWithAffinity> {
|
|
let mut offset_y = 0.0;
|
|
let layout_paragraphs = self.layout.paragraphs.iter().flatten();
|
|
|
|
// IMPORTANT! I'm keeping this because I think it should be better to have the span index
|
|
// cached the same way we keep the paragraph index.
|
|
#[allow(dead_code)]
|
|
let mut _span_index: usize = 0;
|
|
for (paragraph_index, layout_paragraph) in layout_paragraphs.enumerate() {
|
|
let start_y = offset_y;
|
|
let end_y = offset_y + layout_paragraph.height();
|
|
|
|
// We only test against paragraphs that can contain the current y
|
|
// coordinate. Use >= for start and handle zero-height paragraphs.
|
|
let paragraph_height = layout_paragraph.height();
|
|
let matches = if paragraph_height > 0.0 {
|
|
point.y >= start_y && point.y < end_y
|
|
} else {
|
|
// For zero-height paragraphs (empty lines), match if we're at the start position
|
|
point.y >= start_y && point.y <= start_y + 1.0
|
|
};
|
|
|
|
if matches {
|
|
// Skia's get_glyph_position_at_coordinate expects coordinates relative to
|
|
// the paragraph's top-left. For multi-paragraph or wrapped text, each
|
|
// paragraph has its own origin; subtract start_y so we pass paragraph-local coords.
|
|
let para_pt = Point::new(point.x, point.y - start_y);
|
|
let position_with_affinity =
|
|
layout_paragraph.get_glyph_position_at_coordinate((para_pt.x, para_pt.y));
|
|
if let Some(paragraph) = self.paragraphs().get(paragraph_index) {
|
|
// Computed position keeps the current position in terms
|
|
// of number of characters of text. This is used to know
|
|
// in which span we are.
|
|
let mut computed_position: usize = 0;
|
|
|
|
// This could be useful in the future as part of the TextPositionWithAffinity.
|
|
#[allow(dead_code)]
|
|
let mut _span_offset: usize = 0;
|
|
|
|
// If paragraph has no spans, default to span 0, offset 0
|
|
if paragraph.children().is_empty() {
|
|
_span_index = 0;
|
|
_span_offset = 0;
|
|
} else {
|
|
for span in paragraph.children() {
|
|
let length = span.text.chars().count();
|
|
let start_position = computed_position;
|
|
let end_position = computed_position + length;
|
|
let current_position = position_with_affinity.position as usize;
|
|
|
|
// Handle empty spans: if the span is empty and current position
|
|
// matches the start, this is the right span
|
|
if length == 0 && current_position == start_position {
|
|
_span_offset = 0;
|
|
break;
|
|
}
|
|
|
|
if start_position <= current_position
|
|
&& end_position >= current_position
|
|
{
|
|
_span_offset =
|
|
position_with_affinity.position as usize - start_position;
|
|
break;
|
|
}
|
|
computed_position += length;
|
|
_span_index += 1;
|
|
}
|
|
}
|
|
|
|
return Some(TextPositionWithAffinity::new(
|
|
position_with_affinity,
|
|
paragraph_index,
|
|
position_with_affinity.position as usize,
|
|
));
|
|
}
|
|
}
|
|
offset_y += layout_paragraph.height();
|
|
}
|
|
|
|
// Handle completely empty text shapes: if there are no paragraphs or all paragraphs
|
|
// are empty, and the click is within the text shape bounds, return a default position
|
|
if (self.paragraphs().is_empty() || self.layout.paragraphs.is_empty())
|
|
&& self.bounds.contains(*point)
|
|
{
|
|
// Create a default position at the start of the text
|
|
use skia_safe::textlayout::Affinity;
|
|
let default_position = PositionWithAffinity {
|
|
position: 0,
|
|
affinity: Affinity::Downstream,
|
|
};
|
|
return Some(TextPositionWithAffinity::new(
|
|
default_position,
|
|
0, // paragraph 0
|
|
0, // offset 0
|
|
));
|
|
}
|
|
|
|
None
|
|
}
|
|
|
|
pub fn get_caret_position_from_screen_coords(
|
|
&self,
|
|
point: &Point,
|
|
view_matrix: &Matrix,
|
|
shape_matrix: &Matrix,
|
|
) -> Option<TextPositionWithAffinity> {
|
|
let shape_rel_point = Shape::get_relative_point(point, view_matrix, shape_matrix)?;
|
|
self.get_caret_position_from_shape_coords(&shape_rel_point)
|
|
}
|
|
|
|
/// Builds the ParagraphBuilders necessary to render
|
|
/// this text.
|
|
pub fn paragraph_builder_group_from_text(
|
|
&self,
|
|
use_shadow: Option<bool>,
|
|
) -> Vec<ParagraphBuilderGroup> {
|
|
let fonts = get_font_collection();
|
|
let fallback_fonts = get_fallback_fonts();
|
|
let mut paragraph_group = Vec::new();
|
|
|
|
for paragraph in self.paragraphs() {
|
|
let paragraph_style = paragraph.paragraph_to_style();
|
|
let mut builder = ParagraphBuilder::new(¶graph_style, fonts);
|
|
let mut has_text = false;
|
|
for span in paragraph.children() {
|
|
let remove_alpha = use_shadow.unwrap_or(false) && !span.is_transparent();
|
|
let text_style = span.to_style(
|
|
&self.bounds(),
|
|
fallback_fonts,
|
|
remove_alpha,
|
|
paragraph.line_height(),
|
|
);
|
|
let text: String = span.apply_text_transform();
|
|
if !text.is_empty() {
|
|
has_text = true;
|
|
}
|
|
builder.push_style(&text_style);
|
|
builder.add_text(&text);
|
|
}
|
|
if !has_text {
|
|
builder.add_text(" ");
|
|
}
|
|
paragraph_group.push(vec![builder]);
|
|
}
|
|
|
|
paragraph_group
|
|
}
|
|
|
|
/// Creates paragraph builders with always-opaque paint (BLACK @ alpha 255).
|
|
/// Used as a clip mask for inner stroke rendering.
|
|
pub fn paragraph_builder_group_opaque(&self) -> Vec<ParagraphBuilderGroup> {
|
|
let fonts = get_font_collection();
|
|
let fallback_fonts = get_fallback_fonts();
|
|
let mut paragraph_group = Vec::new();
|
|
|
|
for paragraph in self.paragraphs() {
|
|
let paragraph_style = paragraph.paragraph_to_style();
|
|
let mut builder = ParagraphBuilder::new(¶graph_style, fonts);
|
|
let mut has_text = false;
|
|
for span in paragraph.children() {
|
|
let text_style = span.to_style(
|
|
&self.bounds(),
|
|
fallback_fonts,
|
|
true, // always opaque
|
|
paragraph.line_height(),
|
|
);
|
|
let text: String = span.apply_text_transform();
|
|
if !text.is_empty() {
|
|
has_text = true;
|
|
}
|
|
builder.push_style(&text_style);
|
|
builder.add_text(&text);
|
|
}
|
|
if !has_text {
|
|
builder.add_text(" ");
|
|
}
|
|
paragraph_group.push(vec![builder]);
|
|
}
|
|
|
|
paragraph_group
|
|
}
|
|
|
|
/// Performs an Auto Width text layout.
|
|
fn text_layout_auto_width(&self) -> TextContentLayoutResult {
|
|
let mut paragraph_builders = self.paragraph_builder_group_from_text(None);
|
|
|
|
let normalized_line_height =
|
|
calculate_normalized_line_height(&mut paragraph_builders, f32::MAX);
|
|
|
|
let paragraphs =
|
|
build_paragraphs_from_paragraph_builders(&mut paragraph_builders, f32::MAX);
|
|
|
|
let (width, height) =
|
|
paragraphs
|
|
.iter()
|
|
.flatten()
|
|
.fold((0.0, 0.0), |(auto_width, auto_height), paragraph| {
|
|
(
|
|
f32::max(paragraph.longest_line(), auto_width),
|
|
auto_height + paragraph.height(),
|
|
)
|
|
});
|
|
|
|
let size = TextContentSize::new_with_normalized_line_height(
|
|
width.ceil(),
|
|
height.ceil(),
|
|
width.ceil(),
|
|
normalized_line_height,
|
|
);
|
|
TextContentLayoutResult(paragraph_builders, paragraphs, size)
|
|
}
|
|
|
|
/// Private function that performs
|
|
/// Performs an Auto Height text layout.
|
|
fn text_layout_auto_height(&self) -> TextContentLayoutResult {
|
|
let width = self.width();
|
|
let mut paragraph_builders = self.paragraph_builder_group_from_text(None);
|
|
|
|
let normalized_line_height =
|
|
calculate_normalized_line_height(&mut paragraph_builders, width);
|
|
|
|
let paragraphs = build_paragraphs_from_paragraph_builders(&mut paragraph_builders, width);
|
|
let height = paragraphs
|
|
.iter()
|
|
.flatten()
|
|
.fold(0.0, |auto_height, paragraph| {
|
|
auto_height + paragraph.height()
|
|
});
|
|
let size = TextContentSize::new_with_normalized_line_height(
|
|
width,
|
|
height.ceil(),
|
|
DEFAULT_TEXT_CONTENT_SIZE,
|
|
normalized_line_height,
|
|
);
|
|
TextContentLayoutResult(paragraph_builders, paragraphs, size)
|
|
}
|
|
|
|
/// Performs a Fixed text layout.
|
|
fn text_layout_fixed(&self) -> TextContentLayoutResult {
|
|
let width = self.width();
|
|
let mut paragraph_builders = self.paragraph_builder_group_from_text(None);
|
|
|
|
let normalized_line_height =
|
|
calculate_normalized_line_height(&mut paragraph_builders, width);
|
|
|
|
let paragraphs = build_paragraphs_from_paragraph_builders(&mut paragraph_builders, width);
|
|
let paragraph_height = paragraphs
|
|
.iter()
|
|
.flatten()
|
|
.fold(0.0, |auto_height, paragraph| {
|
|
auto_height + paragraph.height()
|
|
});
|
|
|
|
let size = TextContentSize::new_with_normalized_line_height(
|
|
width.ceil(),
|
|
paragraph_height.ceil(),
|
|
DEFAULT_TEXT_CONTENT_SIZE,
|
|
normalized_line_height,
|
|
);
|
|
TextContentLayoutResult(paragraph_builders, paragraphs, size)
|
|
}
|
|
|
|
pub fn get_width(&self, width: f32) -> f32 {
|
|
if self.grow_type() == GrowType::AutoWidth {
|
|
self.size.width
|
|
} else {
|
|
width
|
|
}
|
|
}
|
|
|
|
pub fn get_height(&self, width: f32) -> f32 {
|
|
let mut paragraph_builders = self.paragraph_builder_group_from_text(None);
|
|
let paragraphs = build_paragraphs_from_paragraph_builders(&mut paragraph_builders, width);
|
|
let paragraph_height = paragraphs
|
|
.iter()
|
|
.flatten()
|
|
.fold(0.0, |auto_height, paragraph| {
|
|
auto_height + paragraph.height()
|
|
});
|
|
paragraph_height
|
|
}
|
|
|
|
pub fn needs_update_layout(&self) -> bool {
|
|
self.layout.needs_update()
|
|
}
|
|
|
|
pub fn set_layout_from_result(
|
|
&mut self,
|
|
result: TextContentLayoutResult,
|
|
default_width: f32,
|
|
default_height: f32,
|
|
) {
|
|
self.layout.set(result.0, result.1);
|
|
self.size
|
|
.copy_finite_size(result.2, default_width, default_height);
|
|
}
|
|
|
|
pub fn update_layout(&mut self, selrect: Rect) -> TextContentSize {
|
|
if !self.layout.needs_update()
|
|
&& self.layout_version == self.content_version
|
|
&& self
|
|
.layout_width
|
|
.is_some_and(|w| (w - selrect.width()).abs() < f32::EPSILON)
|
|
{
|
|
return self.size;
|
|
}
|
|
|
|
self.size.set_size(selrect.width(), selrect.height());
|
|
|
|
match self.grow_type() {
|
|
GrowType::AutoHeight => {
|
|
let result = self.text_layout_auto_height();
|
|
self.layout_width = Some(result.2.width);
|
|
self.set_layout_from_result(result, selrect.width(), selrect.height());
|
|
}
|
|
GrowType::AutoWidth => {
|
|
let result = self.text_layout_auto_width();
|
|
self.layout_width = Some(result.2.width);
|
|
self.set_layout_from_result(result, selrect.width(), selrect.height());
|
|
}
|
|
GrowType::Fixed => {
|
|
let result = self.text_layout_fixed();
|
|
self.layout_width = Some(result.2.width);
|
|
self.set_layout_from_result(result, selrect.width(), selrect.height());
|
|
}
|
|
}
|
|
|
|
if self.is_empty() {
|
|
let (placeholder_width, placeholder_height) = self.placeholder_dimensions(selrect);
|
|
self.size.width = placeholder_width;
|
|
self.size.height = placeholder_height;
|
|
self.size.max_width = placeholder_width;
|
|
}
|
|
|
|
self.layout_version = self.content_version;
|
|
self.size
|
|
}
|
|
|
|
/// Return true when the content represents a freshly created empty text.
|
|
/// We consider it empty only if there is exactly one paragraph with a single
|
|
/// span whose text buffer is empty. Any additional paragraphs or characters
|
|
/// mean the user has already entered content.
|
|
fn is_empty(&self) -> bool {
|
|
if self.paragraphs.len() != 1 {
|
|
return false;
|
|
}
|
|
|
|
let paragraph = match self.paragraphs.first() {
|
|
Some(paragraph) => paragraph,
|
|
None => return true,
|
|
};
|
|
if paragraph.children().len() != 1 {
|
|
return false;
|
|
}
|
|
|
|
let span = match paragraph.children().first() {
|
|
Some(span) => span,
|
|
None => return true,
|
|
};
|
|
|
|
span.text.is_empty()
|
|
}
|
|
|
|
/// Compute the placeholder size used while the text is still empty. We ask
|
|
/// Skia to measure a single glyph using the span's typography so the editor
|
|
/// shows a caret-sized box that reflects the selected font, size and spacing.
|
|
/// If that fails we fall back to the previous WASM size or the incoming
|
|
/// selrect dimensions.
|
|
fn placeholder_dimensions(&self, selrect: Rect) -> (f32, f32) {
|
|
if let Some(paragraph) = self.paragraphs.first() {
|
|
if let Some(span) = paragraph.children().first() {
|
|
let fonts = get_font_collection();
|
|
let fallback_fonts = get_fallback_fonts();
|
|
let paragraph_style = paragraph.paragraph_to_style();
|
|
let mut builder = ParagraphBuilder::new(¶graph_style, fonts);
|
|
|
|
let text_style = span.to_style(
|
|
&self.bounds(),
|
|
fallback_fonts,
|
|
false,
|
|
paragraph.line_height(),
|
|
);
|
|
|
|
builder.push_style(&text_style);
|
|
builder.add_text("0");
|
|
|
|
let mut paragraph_layout = builder.build();
|
|
paragraph_layout.layout(f32::MAX);
|
|
|
|
let width = paragraph_layout.max_intrinsic_width();
|
|
let height = paragraph_layout.height();
|
|
|
|
return (width, height);
|
|
}
|
|
}
|
|
|
|
let fallback_width = selrect.width().max(self.size.width);
|
|
let fallback_height = selrect.height().max(self.size.height);
|
|
|
|
(fallback_width, fallback_height)
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
pub fn intersect_position_in_shape(&self, shape: &Shape, x_pos: f32, y_pos: f32) -> bool {
|
|
let rect = shape.selrect;
|
|
let mut matrix = Matrix::new_identity();
|
|
let center = shape.center();
|
|
let Some(inv_transform) = &shape.transform.invert() else {
|
|
return false;
|
|
};
|
|
matrix.pre_translate(center);
|
|
matrix.pre_concat(inv_transform);
|
|
matrix.pre_translate(-center);
|
|
|
|
let result = matrix.map_point((x_pos, y_pos));
|
|
|
|
let x_pos = result.x;
|
|
let y_pos = result.y;
|
|
|
|
x_pos >= rect.x() && x_pos <= rect.right() && y_pos >= rect.y() && y_pos <= rect.bottom()
|
|
}
|
|
|
|
pub fn intersect_position_in_text(&self, shape: &Shape, x_pos: f32, y_pos: f32) -> bool {
|
|
let rect = self.content_rect(&shape.selrect, shape.vertical_align);
|
|
let mut matrix = Matrix::new_identity();
|
|
let center = shape.center();
|
|
let Some(inv_transform) = &shape.transform.invert() else {
|
|
return false;
|
|
};
|
|
matrix.pre_translate(center);
|
|
matrix.pre_concat(inv_transform);
|
|
matrix.pre_translate(-center);
|
|
|
|
let result = matrix.map_point((x_pos, y_pos));
|
|
|
|
// Change coords to content space
|
|
let x_pos = result.x - rect.x();
|
|
let y_pos = result.y - rect.y();
|
|
|
|
if !self.layout.paragraphs.is_empty() {
|
|
// Reuse stored laid-out paragraphs
|
|
paragraph_intersects(
|
|
self.layout
|
|
.paragraphs
|
|
.iter()
|
|
.flat_map(|group| group.first()),
|
|
x_pos,
|
|
y_pos,
|
|
)
|
|
} else {
|
|
let width = self.width();
|
|
let mut paragraph_builders = self.paragraph_builder_group_from_text(None);
|
|
let paragraphs =
|
|
build_paragraphs_from_paragraph_builders(&mut paragraph_builders, width);
|
|
|
|
paragraph_intersects(paragraphs.iter().flatten(), x_pos, y_pos)
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Default for TextContent {
|
|
fn default() -> Self {
|
|
Self {
|
|
paragraphs: vec![],
|
|
bounds: Rect::default(),
|
|
grow_type: GrowType::Fixed,
|
|
size: TextContentSize::default(),
|
|
layout: TextContentLayout::new(),
|
|
content_version: 0,
|
|
layout_version: 0,
|
|
layout_width: None,
|
|
}
|
|
}
|
|
}
|
|
|
|
pub type TextAlign = skia::textlayout::TextAlign;
|
|
pub type TextDirection = skia::textlayout::TextDirection;
|
|
pub type TextDecoration = skia::textlayout::TextDecoration;
|
|
|
|
#[derive(Debug, PartialEq, Clone, Copy)]
|
|
pub enum TextTransform {
|
|
Lowercase,
|
|
Uppercase,
|
|
Capitalize,
|
|
}
|
|
|
|
// FIXME: Rethink this type. We'll probably need to move the serialization to the
|
|
// wasm module and store here meaningful model values (and/or skia type aliases)
|
|
#[derive(Debug, PartialEq, Clone)]
|
|
pub struct Paragraph {
|
|
text_align: TextAlign,
|
|
text_direction: TextDirection,
|
|
text_decoration: Option<TextDecoration>,
|
|
text_transform: Option<TextTransform>,
|
|
line_height: f32,
|
|
letter_spacing: f32,
|
|
children: Vec<TextSpan>,
|
|
}
|
|
|
|
impl Default for Paragraph {
|
|
fn default() -> Self {
|
|
Self {
|
|
text_align: TextAlign::default(),
|
|
text_direction: TextDirection::LTR,
|
|
text_decoration: None,
|
|
text_transform: None,
|
|
line_height: 1.0,
|
|
letter_spacing: 0.0,
|
|
children: vec![],
|
|
}
|
|
}
|
|
}
|
|
|
|
impl Paragraph {
|
|
#[allow(clippy::too_many_arguments)]
|
|
pub fn new(
|
|
text_align: TextAlign,
|
|
text_direction: TextDirection,
|
|
text_decoration: Option<TextDecoration>,
|
|
text_transform: Option<TextTransform>,
|
|
line_height: f32,
|
|
letter_spacing: f32,
|
|
children: Vec<TextSpan>,
|
|
) -> Self {
|
|
Self {
|
|
text_align,
|
|
text_direction,
|
|
text_decoration,
|
|
text_transform,
|
|
line_height,
|
|
letter_spacing,
|
|
children,
|
|
}
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
fn set_children(&mut self, children: Vec<TextSpan>) {
|
|
self.children = children;
|
|
}
|
|
|
|
pub fn children(&self) -> &[TextSpan] {
|
|
&self.children
|
|
}
|
|
|
|
pub fn children_mut(&mut self) -> &mut Vec<TextSpan> {
|
|
&mut self.children
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
fn add_span(&mut self, span: TextSpan) {
|
|
self.children.push(span);
|
|
}
|
|
|
|
pub fn line_height(&self) -> f32 {
|
|
self.line_height
|
|
}
|
|
|
|
pub fn letter_spacing(&self) -> f32 {
|
|
self.letter_spacing
|
|
}
|
|
|
|
pub fn text_align(&self) -> TextAlign {
|
|
self.text_align
|
|
}
|
|
|
|
pub fn text_direction(&self) -> TextDirection {
|
|
self.text_direction
|
|
}
|
|
|
|
pub fn text_decoration(&self) -> Option<TextDecoration> {
|
|
self.text_decoration
|
|
}
|
|
|
|
pub fn text_transform(&self) -> Option<TextTransform> {
|
|
self.text_transform
|
|
}
|
|
|
|
pub fn paragraph_to_style(&self) -> ParagraphStyle {
|
|
let mut style = ParagraphStyle::default();
|
|
|
|
style.set_height(self.line_height);
|
|
style.set_text_align(self.text_align);
|
|
style.set_text_direction(self.text_direction);
|
|
style.set_replace_tab_characters(true);
|
|
style.set_apply_rounding_hack(true);
|
|
style.set_text_height_behavior(skia::textlayout::TextHeightBehavior::All);
|
|
style
|
|
}
|
|
|
|
pub fn scale_content(&mut self, value: f32) {
|
|
self.letter_spacing *= value;
|
|
self.children
|
|
.iter_mut()
|
|
.for_each(|l| l.scale_content(value));
|
|
}
|
|
}
|
|
|
|
/// Capitalize the first letter of each word, preserving all original whitespace.
|
|
/// Matches CSS `text-transform: capitalize` behavior: a "word" starts after
|
|
/// any non-letter character (whitespace, punctuation, digits, symbols).
|
|
fn capitalize_words(text: &str) -> String {
|
|
let mut result = String::with_capacity(text.len());
|
|
let mut capitalize_next = true;
|
|
for c in text.chars() {
|
|
if c.is_alphabetic() {
|
|
if capitalize_next {
|
|
result.extend(c.to_uppercase());
|
|
} else {
|
|
result.push(c);
|
|
}
|
|
capitalize_next = false;
|
|
} else {
|
|
result.push(c);
|
|
capitalize_next = true;
|
|
}
|
|
}
|
|
result
|
|
}
|
|
|
|
/// Filter control characters below U+0020, preserving line breaks.
|
|
/// Browser-dependent: Firefox drops them, others replace with space.
|
|
fn process_ignored_chars(text: &str, browser: u8) -> String {
|
|
text.chars()
|
|
.filter_map(|c| {
|
|
if c == '\n' || c == '\r' || c == '\u{2028}' || c == '\u{2029}' {
|
|
return Some(c);
|
|
}
|
|
if c < '\u{0020}' {
|
|
if browser == Browser::Firefox as u8 {
|
|
None
|
|
} else {
|
|
Some(' ')
|
|
}
|
|
} else {
|
|
Some(c)
|
|
}
|
|
})
|
|
.collect()
|
|
}
|
|
|
|
#[derive(Debug, PartialEq, Clone)]
|
|
pub struct TextSpan {
|
|
pub text: String,
|
|
pub font_family: FontFamily,
|
|
pub font_size: f32,
|
|
pub line_height: f32,
|
|
pub letter_spacing: f32,
|
|
pub font_weight: i32,
|
|
pub font_variant_id: Uuid,
|
|
pub text_decoration: Option<TextDecoration>,
|
|
pub text_transform: Option<TextTransform>,
|
|
pub text_direction: TextDirection,
|
|
pub fills: Vec<shapes::Fill>,
|
|
}
|
|
|
|
impl TextSpan {
|
|
#[allow(clippy::too_many_arguments)]
|
|
pub fn new(
|
|
text: String,
|
|
font_family: FontFamily,
|
|
font_size: f32,
|
|
line_height: f32,
|
|
letter_spacing: f32,
|
|
text_decoration: Option<TextDecoration>,
|
|
text_transform: Option<TextTransform>,
|
|
text_direction: TextDirection,
|
|
font_weight: i32,
|
|
font_variant_id: Uuid,
|
|
fills: Vec<shapes::Fill>,
|
|
) -> Self {
|
|
Self {
|
|
text,
|
|
font_family,
|
|
font_size,
|
|
line_height,
|
|
letter_spacing,
|
|
text_decoration,
|
|
text_transform,
|
|
text_direction,
|
|
font_weight,
|
|
font_variant_id,
|
|
fills,
|
|
}
|
|
}
|
|
|
|
pub fn set_text(&mut self, text: String) {
|
|
self.text = text;
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
pub fn fills(&self) -> &[shapes::Fill] {
|
|
&self.fills
|
|
}
|
|
|
|
pub fn to_style(
|
|
&self,
|
|
content_bounds: &Rect,
|
|
fallback_fonts: &HashSet<String>,
|
|
remove_alpha: bool,
|
|
paragraph_line_height: f32,
|
|
) -> skia::textlayout::TextStyle {
|
|
let mut style = skia::textlayout::TextStyle::default();
|
|
let mut paint = paint::Paint::default();
|
|
|
|
if remove_alpha {
|
|
paint.set_color(skia::Color::BLACK);
|
|
paint.set_alpha(255);
|
|
} else {
|
|
paint = merge_fills(&self.fills, *content_bounds);
|
|
}
|
|
|
|
let max_line_height = f32::max(paragraph_line_height, self.line_height);
|
|
style.set_height(max_line_height);
|
|
style.set_height_override(true);
|
|
style.set_foreground_paint(&paint);
|
|
style.set_decoration_type(match self.text_decoration {
|
|
Some(text_decoration) => text_decoration,
|
|
None => skia::textlayout::TextDecoration::NO_DECORATION,
|
|
});
|
|
|
|
// Trick to avoid showing the text decoration
|
|
style.set_decoration_thickness_multiplier(0.0);
|
|
|
|
let mut font_families = vec![
|
|
self.serialized_font_family(),
|
|
default_font(),
|
|
DEFAULT_EMOJI_FONT.to_string(),
|
|
];
|
|
|
|
font_families.extend(fallback_fonts.iter().cloned());
|
|
style.set_font_families(&font_families);
|
|
style.set_font_size(self.font_size);
|
|
style.set_letter_spacing(self.letter_spacing);
|
|
style.set_half_leading(true);
|
|
|
|
style
|
|
}
|
|
|
|
pub fn to_stroke_style(
|
|
&self,
|
|
stroke_paint: &Paint,
|
|
fallback_fonts: &HashSet<String>,
|
|
remove_alpha: bool,
|
|
paragraph_line_height: f32,
|
|
) -> skia::textlayout::TextStyle {
|
|
let mut style = self.to_style(
|
|
&Rect::default(),
|
|
fallback_fonts,
|
|
remove_alpha,
|
|
paragraph_line_height,
|
|
);
|
|
if remove_alpha {
|
|
let mut paint = skia::Paint::default();
|
|
paint.set_style(stroke_paint.style());
|
|
paint.set_stroke_width(stroke_paint.stroke_width());
|
|
paint.set_color(skia::Color::BLACK);
|
|
paint.set_alpha(255);
|
|
style.set_foreground_paint(&paint);
|
|
} else {
|
|
style.set_foreground_paint(stroke_paint);
|
|
}
|
|
|
|
style.set_font_size(self.font_size);
|
|
style.set_letter_spacing(self.letter_spacing);
|
|
style.set_decoration_type(match self.text_decoration {
|
|
Some(text_decoration) => text_decoration,
|
|
None => skia::textlayout::TextDecoration::NO_DECORATION,
|
|
});
|
|
style
|
|
}
|
|
|
|
fn serialized_font_family(&self) -> String {
|
|
format!("{}", self.font_family)
|
|
}
|
|
|
|
pub fn apply_text_transform(&self) -> String {
|
|
let browser = crate::with_state!(state, { state.current_browser });
|
|
let text = process_ignored_chars(&self.text, browser);
|
|
match self.text_transform {
|
|
Some(TextTransform::Uppercase) => text.to_uppercase(),
|
|
Some(TextTransform::Lowercase) => text.to_lowercase(),
|
|
Some(TextTransform::Capitalize) => capitalize_words(&text),
|
|
None => text,
|
|
}
|
|
}
|
|
|
|
pub fn scale_content(&mut self, value: f32) {
|
|
self.font_size *= value;
|
|
}
|
|
|
|
pub fn is_transparent(&self) -> bool {
|
|
self.fills.iter().all(|fill| match fill {
|
|
shapes::Fill::Solid(shapes::SolidColor(color)) => color.a() == 0,
|
|
_ => false,
|
|
})
|
|
}
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
#[derive(Debug, Copy, Clone)]
|
|
pub struct PositionData {
|
|
pub paragraph: u32,
|
|
pub span: u32,
|
|
pub start_pos: u32,
|
|
pub end_pos: u32,
|
|
pub x: f32,
|
|
pub y: f32,
|
|
pub width: f32,
|
|
pub height: f32,
|
|
pub direction: u32,
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
#[derive(Debug)]
|
|
pub struct ParagraphLayout {
|
|
pub paragraph: skia::textlayout::Paragraph,
|
|
pub x: f32,
|
|
pub y: f32,
|
|
pub spans: Vec<crate::shapes::TextSpan>,
|
|
pub decorations: Vec<TextDecorationSegment>,
|
|
}
|
|
|
|
#[allow(dead_code)]
|
|
#[derive(Debug)]
|
|
pub struct TextLayoutData {
|
|
pub position_data: Vec<PositionData>,
|
|
pub content_rect: Rect,
|
|
pub paragraphs: Vec<ParagraphLayout>,
|
|
}
|
|
|
|
fn direction_to_int(direction: TextDirection) -> u32 {
|
|
match direction {
|
|
TextDirection::RTL => 0,
|
|
TextDirection::LTR => 1,
|
|
}
|
|
}
|
|
|
|
pub fn calculate_text_layout_data(
|
|
shape: &Shape,
|
|
text_content: &TextContent,
|
|
paragraph_builder_groups: &mut [ParagraphBuilderGroup],
|
|
skip_position_data: bool,
|
|
) -> TextLayoutData {
|
|
let selrect_width = shape.selrect().width();
|
|
let text_width = text_content.get_width(selrect_width);
|
|
let selrect_height = shape.selrect().height();
|
|
let x = shape.selrect.x();
|
|
let base_y = shape.selrect.y();
|
|
let mut position_data: Vec<PositionData> = Vec::new();
|
|
let mut previous_line_height = text_content.normalized_line_height();
|
|
let text_paragraphs = text_content.paragraphs();
|
|
|
|
// 1. Build + layout each paragraph once, recording heights as we go.
|
|
let mut paragraph_heights: Vec<f32> = Vec::new();
|
|
let mut built_groups: Vec<Vec<skia::textlayout::Paragraph>> =
|
|
Vec::with_capacity(paragraph_builder_groups.len());
|
|
for paragraph_builder_group in paragraph_builder_groups.iter_mut() {
|
|
let group_len = paragraph_builder_group.len();
|
|
let mut paragraph_offset_y = previous_line_height;
|
|
let mut group_paragraphs: Vec<skia::textlayout::Paragraph> = Vec::with_capacity(group_len);
|
|
for (builder_index, paragraph_builder) in paragraph_builder_group.iter_mut().enumerate() {
|
|
let mut skia_paragraph = paragraph_builder.build();
|
|
skia_paragraph.layout(text_width);
|
|
if builder_index == group_len - 1 {
|
|
if skia_paragraph.get_line_metrics().is_empty() {
|
|
paragraph_offset_y = skia_paragraph.ideographic_baseline();
|
|
} else {
|
|
paragraph_offset_y = skia_paragraph.height();
|
|
}
|
|
}
|
|
if builder_index == 0 {
|
|
paragraph_heights.push(skia_paragraph.height());
|
|
}
|
|
group_paragraphs.push(skia_paragraph);
|
|
}
|
|
previous_line_height = paragraph_offset_y;
|
|
built_groups.push(group_paragraphs);
|
|
}
|
|
|
|
// 2. Position each built paragraph using the heights from step 1.
|
|
let total_text_height: f32 = paragraph_heights.iter().sum();
|
|
let vertical_offset = match shape.vertical_align() {
|
|
VerticalAlign::Center => (selrect_height - total_text_height) / 2.0,
|
|
VerticalAlign::Bottom => selrect_height - total_text_height,
|
|
_ => 0.0,
|
|
};
|
|
let mut paragraph_layouts: Vec<ParagraphLayout> = Vec::new();
|
|
let mut y_accum = base_y + vertical_offset;
|
|
for (i, group_paragraphs) in built_groups.into_iter().enumerate() {
|
|
// For each paragraph in the group (e.g., fill, stroke, etc.)
|
|
for skia_paragraph in group_paragraphs.into_iter() {
|
|
let spans = if let Some(text_para) = text_paragraphs.get(i) {
|
|
text_para.children().to_vec()
|
|
} else {
|
|
Vec::new()
|
|
};
|
|
|
|
// Calculate text decorations for this paragraph
|
|
let mut decorations = Vec::new();
|
|
let line_metrics = skia_paragraph.get_line_metrics();
|
|
for line in &line_metrics {
|
|
let style_metrics: Vec<_> = line
|
|
.get_style_metrics(line.start_index..line.end_index)
|
|
.into_iter()
|
|
.collect();
|
|
let line_baseline = y_accum + line.baseline as f32;
|
|
let (max_underline_thickness, underline_y, max_strike_thickness, strike_y) =
|
|
calculate_decoration_metrics(&style_metrics, line_baseline);
|
|
for (i, (style_start, style_metric)) in style_metrics.iter().enumerate() {
|
|
let text_style = &style_metric.text_style;
|
|
let style_end = style_metrics
|
|
.get(i + 1)
|
|
.map(|(next_i, _)| *next_i)
|
|
.unwrap_or(line.end_index);
|
|
let seg_start = (*style_start).max(line.start_index);
|
|
let seg_end = style_end.min(line.end_index);
|
|
if seg_start >= seg_end {
|
|
continue;
|
|
}
|
|
let rects = skia_paragraph.get_rects_for_range(
|
|
seg_start..seg_end,
|
|
skia::textlayout::RectHeightStyle::Tight,
|
|
skia::textlayout::RectWidthStyle::Tight,
|
|
);
|
|
let (segment_width, actual_x_offset) = if !rects.is_empty() {
|
|
let total_width: f32 = rects.iter().map(|r| r.rect.width()).sum();
|
|
let skia_x_offset = rects
|
|
.first()
|
|
.map(|r| r.rect.left - line.left as f32)
|
|
.unwrap_or(0.0);
|
|
(total_width, skia_x_offset)
|
|
} else {
|
|
(0.0, 0.0)
|
|
};
|
|
let text_left = x + line.left as f32 + actual_x_offset;
|
|
let text_width = segment_width;
|
|
use skia::textlayout::TextDecoration;
|
|
if text_style.decoration().ty == TextDecoration::UNDERLINE {
|
|
decorations.push(TextDecorationSegment {
|
|
kind: TextDecoration::UNDERLINE,
|
|
text_style: (*text_style).clone(),
|
|
y: underline_y.unwrap_or(line_baseline),
|
|
thickness: max_underline_thickness,
|
|
left: text_left,
|
|
width: text_width,
|
|
});
|
|
}
|
|
if text_style.decoration().ty == TextDecoration::LINE_THROUGH {
|
|
decorations.push(TextDecorationSegment {
|
|
kind: TextDecoration::LINE_THROUGH,
|
|
text_style: (*text_style).clone(),
|
|
y: strike_y.unwrap_or(line_baseline),
|
|
thickness: max_strike_thickness,
|
|
left: text_left,
|
|
width: text_width,
|
|
});
|
|
}
|
|
}
|
|
}
|
|
paragraph_layouts.push(ParagraphLayout {
|
|
paragraph: skia_paragraph,
|
|
x,
|
|
y: y_accum,
|
|
spans: spans.clone(),
|
|
decorations,
|
|
});
|
|
}
|
|
y_accum += paragraph_heights[i];
|
|
}
|
|
|
|
// Calculate position data from paragraph_layouts
|
|
if !skip_position_data {
|
|
for (paragraph_index, para_layout) in paragraph_layouts.iter().enumerate() {
|
|
let current_y = para_layout.y;
|
|
let text_paragraph = text_paragraphs.get(paragraph_index);
|
|
if let Some(text_para) = text_paragraph {
|
|
let mut span_ranges: Vec<(usize, usize, usize)> = vec![];
|
|
let mut cur = 0;
|
|
for (span_index, span) in text_para.children().iter().enumerate() {
|
|
let text: String = span.apply_text_transform();
|
|
let text_len = text.encode_utf16().count();
|
|
span_ranges.push((cur, cur + text_len, span_index));
|
|
cur += text_len;
|
|
}
|
|
for (start, end, span_index) in span_ranges {
|
|
let rects = para_layout.paragraph.get_rects_for_range(
|
|
start..end,
|
|
RectHeightStyle::Tight,
|
|
RectWidthStyle::Tight,
|
|
);
|
|
|
|
for textbox in rects {
|
|
let direction = textbox.direct;
|
|
let mut rect = textbox.rect;
|
|
let cy = rect.top + rect.height() / 2.0;
|
|
|
|
// Get byte positions from Skia's transformed text layout
|
|
let start_pos = para_layout
|
|
.paragraph
|
|
.get_glyph_position_at_coordinate((rect.left + 0.1, cy))
|
|
.position as usize
|
|
- start;
|
|
|
|
let end_pos = para_layout
|
|
.paragraph
|
|
.get_glyph_position_at_coordinate((rect.right - 0.1, cy))
|
|
.position as usize
|
|
- start;
|
|
|
|
rect.offset((x, current_y));
|
|
position_data.push(PositionData {
|
|
paragraph: paragraph_index as u32,
|
|
span: span_index as u32,
|
|
start_pos: start_pos as u32,
|
|
end_pos: end_pos as u32,
|
|
x: rect.x(),
|
|
y: rect.y(),
|
|
width: rect.width(),
|
|
height: rect.height(),
|
|
direction: direction_to_int(direction),
|
|
});
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
let content_rect = Rect::from_xywh(x, base_y + vertical_offset, text_width, total_text_height);
|
|
TextLayoutData {
|
|
position_data,
|
|
content_rect,
|
|
paragraphs: paragraph_layouts,
|
|
}
|
|
}
|
|
|
|
pub fn calculate_position_data(
|
|
shape: &Shape,
|
|
text_content: &TextContent,
|
|
skip_position_data: bool,
|
|
) -> Vec<PositionData> {
|
|
let mut text_content = text_content.clone();
|
|
text_content.update_layout(shape.selrect);
|
|
|
|
let mut paragraph_builders = text_content.paragraph_builder_group_from_text(None);
|
|
let layout_info = calculate_text_layout_data(
|
|
shape,
|
|
&text_content,
|
|
&mut paragraph_builders,
|
|
skip_position_data,
|
|
);
|
|
|
|
layout_info.position_data
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn capitalize_basic_words() {
|
|
assert_eq!(capitalize_words("hello world"), "Hello World");
|
|
}
|
|
|
|
#[test]
|
|
fn capitalize_preserves_leading_whitespace() {
|
|
assert_eq!(capitalize_words(" hello"), " Hello");
|
|
}
|
|
|
|
#[test]
|
|
fn capitalize_preserves_trailing_whitespace() {
|
|
assert_eq!(capitalize_words("hello "), "Hello ");
|
|
}
|
|
|
|
#[test]
|
|
fn capitalize_preserves_multiple_spaces() {
|
|
assert_eq!(capitalize_words("hello world"), "Hello World");
|
|
}
|
|
|
|
#[test]
|
|
fn capitalize_whitespace_only() {
|
|
assert_eq!(capitalize_words(" "), " ");
|
|
assert_eq!(capitalize_words(" "), " ");
|
|
}
|
|
|
|
#[test]
|
|
fn capitalize_empty_string() {
|
|
assert_eq!(capitalize_words(""), "");
|
|
}
|
|
|
|
#[test]
|
|
fn capitalize_single_char() {
|
|
assert_eq!(capitalize_words("a"), "A");
|
|
}
|
|
|
|
#[test]
|
|
fn capitalize_already_uppercase() {
|
|
assert_eq!(capitalize_words("HELLO WORLD"), "HELLO WORLD");
|
|
}
|
|
|
|
#[test]
|
|
fn capitalize_preserves_tabs_and_newlines() {
|
|
assert_eq!(capitalize_words("hello\tworld"), "Hello\tWorld");
|
|
assert_eq!(capitalize_words("hello\nworld"), "Hello\nWorld");
|
|
}
|
|
|
|
#[test]
|
|
fn capitalize_after_punctuation() {
|
|
assert_eq!(capitalize_words("(readonly)"), "(Readonly)");
|
|
assert_eq!(capitalize_words("hello-world"), "Hello-World");
|
|
assert_eq!(capitalize_words("one/two/three"), "One/Two/Three");
|
|
}
|
|
|
|
#[test]
|
|
fn capitalize_after_digits() {
|
|
assert_eq!(capitalize_words("item1name"), "Item1Name");
|
|
}
|
|
|
|
#[test]
|
|
fn process_ignored_chars_preserves_spaces() {
|
|
assert_eq!(process_ignored_chars("hello world", 0), "hello world");
|
|
}
|
|
|
|
#[test]
|
|
fn process_ignored_chars_preserves_line_breaks() {
|
|
assert_eq!(process_ignored_chars("hello\nworld", 0), "hello\nworld");
|
|
assert_eq!(process_ignored_chars("hello\rworld", 0), "hello\rworld");
|
|
}
|
|
|
|
#[test]
|
|
fn process_ignored_chars_replaces_control_chars_chrome() {
|
|
// U+0001 (SOH) should become space in non-Firefox
|
|
assert_eq!(
|
|
process_ignored_chars("a\x01b", Browser::Chrome as u8),
|
|
"a b"
|
|
);
|
|
}
|
|
|
|
#[test]
|
|
fn process_ignored_chars_removes_control_chars_firefox() {
|
|
assert_eq!(
|
|
process_ignored_chars("a\x01b", Browser::Firefox as u8),
|
|
"ab"
|
|
);
|
|
}
|
|
}
|