Add SpanListIterator

Cargo.toml

@@ -33,6 +33,7 @@ owning_ref = "0.3"
 toml = "0.4"
 unicode-segmentation = "1.0"
 unicode-width = "0.1"
+xi-unicode = "0.1.0"
 
 [dependencies.bear-lib-terminal]
 optional = true

src/lib.rs

@@ -63,6 +63,7 @@
 extern crate log;
 #[macro_use]
 extern crate maplit;
+extern crate xi_unicode;
 extern crate num;
 extern crate owning_ref;
 extern crate toml;

src/theme.rs

@@ -123,7 +123,7 @@ use toml;
 /// Combine a color and an effect.
 ///
 /// Represents any transformation that can be applied to text.
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub struct Style {
     /// Effect to apply.
     ///
@@ -165,7 +165,7 @@ impl From<ColorStyle> for Style {
 }
 
 /// Text effect
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, PartialEq, Eq)]
 pub enum Effect {
     /// No effect
     Simple,

src/utils/lines_iterator.rs

@@ -26,8 +26,8 @@ impl<'a> LinesIterator<'a> {
     /// Yields rows of `width` cells or less.
     pub fn new(content: &'a str, width: usize) -> Self {
         LinesIterator {
-            content: content,
+            content,
-            width: width,
+            width,
             offset: 0,
             show_spaces: false,
         }

src/utils/mod.rs

@@ -5,6 +5,7 @@ use unicode_width::UnicodeWidthStr;
 
 mod lines_iterator;
 mod reader;
+pub mod span_lines_iterator;
 
 pub use self::lines_iterator::{LinesIterator, Row};
 pub use self::reader::ProgressReader;

src/utils/span_lines_iterator.rs

@@ -1,150 +1,800 @@
+//! bla
 use std::borrow::Cow;
+use std::iter::Peekable;
 use theme::Style;
+use unicode_segmentation::UnicodeSegmentation;
 use unicode_width::UnicodeWidthStr;
 use xi_unicode::LineBreakLeafIter;
 
+/// Input to the algorithm
+#[derive(Debug, Clone, PartialEq, Eq)]
 pub struct Span<'a> {
     text: Cow<'a, str>,
-    width: usize,
     style: Style,
 }
 
-pub struct Row<'a> {
+/// Refers to a part of a span
-    spans: Vec<Span<'a>>,
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
-    width: usize,
+pub struct Segment {
+    /// ID of the span this segment refers to
+    pub span_id: usize,
+
+    /// Beginning of this segment within the span (included)
+    pub start: usize,
+    /// End of this segment within the span (excluded)
+    pub end: usize,
+
+    /// Width of this segment
+    pub width: usize,
 }
 
-pub struct SpanLinesIterator<'a: 'b, 'b> {
+impl Segment {
-    /// Input that we want to split
+    #[cfg(test)]
-    content: &'b [Span<'a>],
+    fn with_text<'a>(self, text: &'a str) -> SegmentWithText<'a> {
+        SegmentWithText { text, seg: self }
+    }
+}
 
-    /// Available width
+#[derive(Debug, Clone, Copy, PartialEq, Eq)]
+struct SegmentWithText<'a> {
+    seg: Segment,
+    text: &'a str,
+}
+
+/// Non-splittable piece of text.
+#[derive(Debug, Clone, PartialEq, Eq)]
+struct Chunk<'a> {
     width: usize,
+    segments: Vec<SegmentWithText<'a>>,
+    hard_stop: bool,
+    ends_with_space: bool,
+}
+
+impl<'a> Chunk<'a> {
+    /// Remove some text from the front.
+    ///
+    /// We're given the length (number of bytes) and the width.
+    fn remove_front(&mut self, mut to_remove: ChunkPart) {
+        // Remove something from each segment until we've removed enough.
+        for segment in &mut self.segments {
+            if to_remove.length <= segment.seg.end - segment.seg.start {
+                // This segment is bigger than what we need to remove
+                // So just trim the prefix and stop there.
+                segment.seg.start += to_remove.length;
+                segment.seg.width -= to_remove.width;
+                segment.text = &segment.text[to_remove.length..];
+                break;
+            } else {
+                // This segment is too small, so it'll disapear entirely.
+                to_remove.length -= segment.seg.end - segment.seg.start;
+                to_remove.width -= segment.seg.width;
+
+                // Empty this segment
+                segment.seg.start = segment.seg.end;
+                segment.seg.width = 0;
+                segment.text = &"";
+            }
+        }
+    }
+
+    /// Remove the last character from this chunk.
+    ///
+    /// Usually done to remove a trailing space/newline.
+    fn remove_last_char(&mut self) {
+        // We remove the last char in 2 situations:
+        // * Trailing space.
+        // * Trailing newline.
+        // Only in the first case does this affect width.
+        // (Because newlines have 0 width)
+
+        if self.ends_with_space {
+            // Only reduce the width if the last char was a space.
+            // Otherwise it's a newline, and we don't want to reduce
+            // that.
+            self.width -= 1;
+        }
+
+        // Is the last segment empty after trimming it?
+        // If yes, just drop it.
+        let last_empty = {
+            let last = self.segments.last_mut().unwrap();
+            last.seg.end -= 1;
+            if self.ends_with_space {
+                last.seg.width -= 1;
+            }
+            last.seg.start == last.seg.end
+        };
+        if last_empty {
+            self.segments.pop().unwrap();
+        }
+    }
+}
+
+/// Iterator that returns non-breakable chunks of text.
+///
+/// Works accross spans of text.
+struct ChunkIterator<'a, 'b>
+where
+    'a: 'b,
+{
+    /// Input that we want to split
+    spans: &'b [Span<'a>],
 
     current_span: usize,
+
+    /// How much of the current span has been processed already.
     offset: usize,
 }
 
-impl<'a: 'b, 'b> SpanLinesIterator<'a, 'b> {
+impl<'a, 'b> ChunkIterator<'a, 'b>
-    pub fn new(content: &'b [Span<'a>], width: usize) -> Self {
+where
-        SpanLinesIterator {
+    'a: 'b,
-            content,
+{
-            width,
+    fn new(spans: &'b [Span<'a>]) -> Self {
+        ChunkIterator {
+            spans,
             current_span: 0,
             offset: 0,
         }
     }
 }
 
-// Intermediate representation of a Span, easier to manipulate.
+/// This iterator produces chunks of non-breakable text.
-struct Segment {
+///
-    span_id: usize,
+/// These chunks may go accross spans (a single word may be broken into more
-    start: usize,
+/// than one span, for instance if parts of it are marked up differently).
-    end: usize,
+impl<'a, 'b> Iterator for ChunkIterator<'a, 'b>
-    width: usize,
+where
-}
+    'a: 'b,
+{
+    type Item = Chunk<'b>;
 
-impl<'a, 'b> Iterator for SpanLinesIterator<'a, 'b> {
+    fn next(&mut self) -> Option<Self::Item> {
-    type Item = Row<'a>;
+        if self.current_span >= self.spans.len() {
-
-    fn next(&mut self) -> Option<Row<'a>> {
-        if self.current_span >= self.content.len() {
             return None;
         }
 
-        let current_span = &self.content[self.current_span];
+        let mut span: &Span<'a> = &self.spans[self.current_span];
 
-        let mut available = self.width;
+        let mut total_width = 0;
-        let mut iter = LineBreakLeafIter::new(&current_span.text, self.offset);
 
-        let mut spans = Vec::new();
+        // We'll use an iterator from xi-unicode to detect possible breaks.
-        let mut width = 0;
+        let mut iter = LineBreakLeafIter::new(&span.text, self.offset);
 
-        // We'll build a list of segments.
+        // We'll accumulate segments from spans.
-        // There will be a 1-for-1 mapping from segments to spans.
+        let mut segments = Vec::new();
-        // But segments are easier to manipulate and extend for now.
-        let mut segments: Vec<Segment> = Vec::new();
 
-        // When a span does not end on a possible break, its last segment
+        // When we reach the end of a span, xi-unicode returns a break, but it
-        // can only be included depending on what comes after.
+        // actually depends on the next span. Such breaks are "fake" breaks.
-        // So we keep a list of consecutive segments ids without breaks.
+        // So we'll loop until we find a "true" break
-        let mut carry_over: Vec<usize> = Vec::new();
+        // (a break that doesn't happen an the end of a span).
-        // Whenever a segment is accepted, all of these can be inserted too.
+        // Most of the time, it will happen on the first iteration.
-
-        'outer: for (span_id, span) in
-            self.content.iter().enumerate().skip(self.current_span)
-        {
-            // Make a new segment!
         loop {
-                // Get the next possible break point.
+            // Look at next possible break
-                let (pos, hard) = iter.next(&span.text);
+            // `hard_stop = true` means that the break is non-optional,
+            // like after a `\n`.
+            let (pos, hard_stop) = iter.next(&span.text);
 
-                // Lookup the corresponding text segment.
+            // When xi-unicode reaches the end of a span, it returns a "fake"
-                let segment = &span.text[self.offset..pos];
+            // break. To know if it's actually a true break, we need to give
-                let width = segment.width();
+            // it the next span. If, given the next span, it returns a break
-
+            // at position 0, then the previous one was a true break.
-                // If it doesn't fit, it's time to go home.
+            // So when pos = 0, we don't really have a new segment, but we
-                if width > available {
+            // can end the current chunk.
-                    // Early return!
-                    break 'outer;
-                }
-
-                available -= width;
-
-                // It fits, but... for real?
-                if pos == span.text.len() {
-                    // It was too good to be true!
-                    // It's just the end of a span, not an actual break.
-                    // So save this stub for now, and move on to the next span.
-                    carry_over.push(span_id);
-                    // Start on the next span.
-                    self.offset = 0;
-                    break;
-                }
-
-                // We got it! We got a chunk!
-                // First, append any carry-over segment
-                for carry in carry_over.drain(..) {
-                    // We need to include this entire segment.
-                    if segments.last().map(|s| s.span_id) == Some(carry) {
 
+            let (width, ends_with_space) = if pos == 0 {
+                // If pos = 0, we had a span before.
+                let prev_span = &self.spans[self.current_span - 1];
+                (0, prev_span.text.ends_with(' '))
             } else {
-                        segments.push(Segment {});
+                // We actually got something.
-                    }
+                // Remember its width, and whether it ends with a space.
-                }
+                //
+                // (When a chunk ends with a space, we may compress it a bit
+                // near the end of a row, so this information will be useful
+                // later.)
+                let text = &span.text[self.offset..pos];
+
+                (text.width(), text.ends_with(' '))
+            };
 
-                // Include the present segment.
             if pos != 0 {
-                    segments.push(Segment {
+                // If pos != 0, we got an actual segment of a span.
-                        span_id,
+                total_width += width;
-                        width,
+                segments.push(SegmentWithText {
+                    seg: Segment {
+                        span_id: self.current_span,
                         start: self.offset,
                         end: pos,
+                        width,
+                    },
+                    text: &span.text[self.offset..pos],
                 });
+            }
 
+            if pos == span.text.len() {
+                // If we reached the end of the slice,
+                // we need to look at the next span first.
+                self.current_span += 1;
+
+                if self.current_span >= self.spans.len() {
+                    // If this was the last chunk, return as is!
+                    return Some(Chunk {
+                        width: total_width,
+                        segments,
+                        hard_stop,
+                        ends_with_space,
+                    });
+                }
+
+                span = &self.spans[self.current_span];
+                self.offset = 0;
+                continue;
+            }
+
+            // Remember where we are.
             self.offset = pos;
+
+            // We found a valid stop, return the current chunk.
+            return Some(Chunk {
+                width: total_width,
+                segments,
+                hard_stop,
+                ends_with_space,
+            });
+        }
+    }
+}
+
+/// A list of segments representing a row of text
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Row {
+    /// List of segments
+    pub segments: Vec<Segment>,
+    /// Total width for this row
+    pub width: usize,
+}
+
+/// Generates rows of text in constrainted width.
+///
+/// Works on spans of text.
+pub struct SpanLinesIterator<'a, 'b>
+where
+    'a: 'b,
+{
+    iter: Peekable<ChunkIterator<'a, 'b>>,
+
+    /// Available width
+    width: usize,
+
+    /// If a chunk wouldn't fit, we had to cut it in pieces.
+    /// This is how far in the current chunk we are.
+    chunk_offset: ChunkPart,
+}
+
+impl<'a, 'b> SpanLinesIterator<'a, 'b>
+where
+    'a: 'b,
+{
+    /// Creates a new iterator with the given content and width.
+    pub fn new(spans: &'b [Span<'a>], width: usize) -> Self {
+        SpanLinesIterator {
+            iter: ChunkIterator::new(spans).peekable(),
+            width,
+            chunk_offset: ChunkPart::default(),
+        }
+    }
+}
+
+/// Result of a fitness test
+///
+/// Describes how well a chunk fits in the available space.
+enum ChunkFitResult {
+    /// This chunk can fit as-is
+    Fits,
+
+    /// This chunk fits, but it'll be the last one.
+    /// Additionally, its last char may need to be removed.
+    FitsBarely,
+
+    /// This chunk doesn't fit. Don't even.
+    DoesNotFit,
+}
+
+/// Look at a chunk, and decide how it could fit.
+fn consider_chunk(available: usize, chunk: &Chunk) -> ChunkFitResult {
+    if chunk.width <= available {
+        // We fits. No question about it.
+        if chunk.hard_stop {
+            // Still, we have to stop here.
+            // And possibly trim a newline.
+            ChunkFitResult::FitsBarely
+        } else {
+            // Nothing special here.
+            ChunkFitResult::Fits
+        }
+    } else if chunk.width == available + 1 {
+        // We're just SLIGHTLY too big!
+        // Can we just pop something?
+        if chunk.ends_with_space {
+            // Yay!
+            ChunkFitResult::FitsBarely
+        } else {
+            // Noo(
+            ChunkFitResult::DoesNotFit
+        }
+    } else {
+        // Can't bargain with me.
+        ChunkFitResult::DoesNotFit
+    }
+}
+
+#[derive(Debug, Clone, Copy, PartialEq, Eq, Default)]
+/// Describes a part of a chunk.
+///
+/// Includes both length and width to ease some computations.
+///
+/// This is used to represent how much of a chunk we've already processed.
+struct ChunkPart {
+    width: usize,
+    length: usize,
+}
+
+/// Concatenates chunks as long as they fit in the given width.
+fn prefix<'a, I>(
+    tokens: &mut Peekable<I>, width: usize, offset: &mut ChunkPart
+) -> Vec<Chunk<'a>>
+where
+    I: Iterator<Item = Chunk<'a>>,
+{
+    let mut available = width;
+    let mut chunks = Vec::new();
+
+    // Accumulate chunks until it doesn't fit.
+    loop {
+        // Look at the next chunk and see if it would fit.
+        let result = {
+            let next_chunk = match tokens.peek() {
+                None => break,
+                Some(chunk) => chunk,
+            };
+
+            // When considering if the chunk fits, remember that we may
+            // already have processed part of it.
+            // So (chunk - width) fits available
+            // if chunks fits (available + width)
+            consider_chunk(available + offset.width, next_chunk)
+        };
+
+        match result {
+            ChunkFitResult::Fits => {
+                // It fits! Add it and move to the next one.
+                let mut chunk = tokens.next().unwrap();
+                // Remember to strip the prefix, in case we took some earlier.
+                chunk.remove_front(*offset);
+                // And reset out offset.
+                offset.length = 0;
+                offset.width = 0;
+
+                available -= chunk.width;
+                chunks.push(chunk);
+                continue;
+            }
+            ChunkFitResult::FitsBarely => {
+                // That's it, it's the last one and we're off.
+                let mut chunk = tokens.next().unwrap();
+                chunk.remove_front(*offset);
+                offset.length = 0;
+                offset.width = 0;
+
+                // We know we need to remove the last character.
+                // Because it's either:
+                // * A hard stop: there is a newline
+                // * A compressed chunk: it ends with a space
+                chunk.remove_last_char();
+                chunks.push(chunk);
+                // No need to update `available`,
+                // as we're ending the line anyway.
+                break;
+            }
+            ChunkFitResult::DoesNotFit => {
+                break;
+            }
+        }
     }
 
-                if hard {
+    chunks
-                    // Stop here.
+}
-                    break 'outer;
+
+impl<'a, 'b> Iterator for SpanLinesIterator<'a, 'b>
+where
+    'a: 'b,
+{
+    type Item = Row;
+
+    fn next(&mut self) -> Option<Row> {
+        // Let's build a beautiful row.
+
+        let mut chunks =
+            prefix(&mut self.iter, self.width, &mut self.chunk_offset);
+
+        if chunks.is_empty() {
+            // Desperate action to make something fit:
+            // Look at the current chunk. We'll try to return a part of it.
+            // So now, consider each individual grapheme as a valid chunk.
+            // Note: it may not be the first time we try to fit this chunk,
+            // so remember to trim the offset we may have stored.
+            match self.iter.peek() {
+                None => return None,
+                Some(chunk) => {
+                    let mut chunk = chunk.clone();
+                    chunk.remove_front(self.chunk_offset);
+
+                    // Try to fit part of it?
+                    let graphemes = chunk.segments.iter().flat_map(|seg| {
+                        let mut offset = seg.seg.start;
+                        seg.text.graphemes(true).map(move |g| {
+                            let width = g.width();
+                            let start = offset;
+                            let end = offset + g.len();
+                            offset = end;
+                            Chunk {
+                                width,
+                                segments: vec![
+                                    SegmentWithText {
+                                        text: g,
+                                        seg: Segment {
+                                            width,
+                                            span_id: seg.seg.span_id,
+                                            start,
+                                            end,
+                                        },
+                                    },
+                                ],
+                                hard_stop: false,
+                                ends_with_space: false,
                             }
+                        })
+                    });
+                    chunks = prefix(
+                        &mut graphemes.peekable(),
+                        self.width,
+                        &mut ChunkPart::default(),
+                    );
+
+                    if chunks.is_empty() {
+                        // Seriously? After everything we did for you?
+                        return None;
+                    }
+
+                    // We are going to return a part of a chunk.
+                    // So remember what we selected,
+                    // so we can skip it next time.
+                    let width: usize =
+                        chunks.iter().map(|chunk| chunk.width).sum();
+                    let length: usize = chunks
+                        .iter()
+                        .flat_map(|chunk| chunk.segments.iter())
+                        .map(|segment| segment.text.len())
+                        .sum();
+
+                    self.chunk_offset.width += width;
+                    self.chunk_offset.length += length;
+                }
+            }
+        }
+
+        let width = chunks.iter().map(|c| c.width).sum();
+        assert!(width <= self.width);
+
+        // Concatenate all segments
+        let segments = SegmentMergeIterator::new(
+            chunks
+                .into_iter()
+                .flat_map(|chunk| chunk.segments)
+                .map(|segment| segment.seg)
+                .filter(|segment| segment.start != segment.end),
+        ).collect();
+
+        // TODO: merge consecutive segments of the same span
+
+        Some(Row { segments, width })
+    }
+}
+
+struct SegmentMergeIterator<I> {
+    current: Option<Segment>,
+    inner: I,
+}
+
+impl<I> SegmentMergeIterator<I> {
+    fn new(inner: I) -> Self {
+        SegmentMergeIterator {
+            inner,
+            current: None,
+        }
+    }
+}
+
+impl<I> Iterator for SegmentMergeIterator<I>
+where
+    I: Iterator<Item = Segment>,
+{
+    type Item = Segment;
+
+    fn next(&mut self) -> Option<Self::Item> {
+        if self.current.is_none() {
+            self.current = self.inner.next();
+            if self.current.is_none() {
+                return None;
             }
         }
 
         loop {
-            let current_span = &self.content[self.current_span];
+            match self.inner.next() {
-            let (pos, hard) = iter.next(&current_span.text);
+                None => return self.current.take(),
-
+                Some(next) => {
-            // This is what we consider adding
+                    if next.span_id == self.current.unwrap().span_id {
-            let text = &current_span.text[self.offset..pos];
+                        let current = self.current.as_mut().unwrap();
-
+                        current.end = next.end;
-            if hard {
+                        current.width += next.width;
-                // Stop there!
+                    } else {
-                break;
+                        let current = self.current.take();
+                        self.current = Some(next);
+                        return current;
+                    }
+                }
             }
         }
-
+    }
-        Some(Row { spans, width })
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    fn input() -> Vec<Span<'static>> {
+        vec![
+            Span {
+                text: Cow::Borrowed("A beautiful "),
+                style: Style::none(),
+            },
+            Span {
+                text: Cow::Borrowed("boat"),
+                style: Style::none(),
+            },
+            Span {
+                text: Cow::Borrowed(" isn't it?\nYes indeed, my "),
+                style: Style::none(),
+            },
+            Span {
+                text: Cow::Borrowed("Super"),
+                style: Style::none(),
+            },
+            Span {
+                text: Cow::Borrowed("Captain !"),
+                style: Style::none(),
+            },
+        ]
+    }
+
+    #[test]
+    fn test_lines_iter() {
+        let input = input();
+
+        let iter = SpanLinesIterator::new(&input, 16);
+        let rows: Vec<Row> = iter.collect();
+
+        assert_eq!(
+            &rows[..],
+            &[
+                Row {
+                    segments: vec![
+                        Segment {
+                            span_id: 0,
+                            start: 0,
+                            end: 12,
+                            width: 12,
+                        },
+                        Segment {
+                            span_id: 1,
+                            start: 0,
+                            end: 4,
+                            width: 4,
+                        },
+                    ],
+                    width: 16,
+                },
+                Row {
+                    segments: vec![
+                        Segment {
+                            span_id: 2,
+                            start: 1,
+                            end: 10,
+                            width: 9,
+                        },
+                    ],
+                    width: 9,
+                },
+                Row {
+                    segments: vec![
+                        Segment {
+                            span_id: 2,
+                            start: 11,
+                            end: 26,
+                            width: 15,
+                        },
+                    ],
+                    width: 15,
+                },
+                Row {
+                    segments: vec![
+                        Segment {
+                            span_id: 3,
+                            start: 0,
+                            end: 5,
+                            width: 5,
+                        },
+                        Segment {
+                            span_id: 4,
+                            start: 0,
+                            end: 9,
+                            width: 9,
+                        },
+                    ],
+                    width: 14,
+                }
+            ]
+        );
+    }
+
+    #[test]
+    fn test_chunk_iter() {
+        let input = input();
+
+        let iter = ChunkIterator::new(&input);
+        let chunks: Vec<Chunk> = iter.collect();
+
+        assert_eq!(
+            &chunks[..],
+            &[
+                Chunk {
+                    width: 2,
+                    segments: vec![
+                        Segment {
+                            span_id: 0,
+                            start: 0,
+                            end: 2,
+                            width: 2,
+                        }.with_text("A "),
+                    ],
+                    hard_stop: false,
+                    ends_with_space: true,
+                },
+                Chunk {
+                    width: 10,
+                    segments: vec![
+                        Segment {
+                            span_id: 0,
+                            start: 2,
+                            end: 12,
+                            width: 10,
+                        }.with_text("beautiful "),
+                    ],
+                    hard_stop: false,
+                    ends_with_space: true,
+                },
+                Chunk {
+                    width: 5,
+                    segments: vec![
+                        Segment {
+                            span_id: 1,
+                            start: 0,
+                            end: 4,
+                            width: 4,
+                        }.with_text("boat"),
+                        Segment {
+                            span_id: 2,
+                            start: 0,
+                            end: 1,
+                            width: 1,
+                        }.with_text(" "),
+                    ],
+                    hard_stop: false,
+                    ends_with_space: true,
+                },
+                Chunk {
+                    width: 6,
+                    segments: vec![
+                        // "isn't "
+                        Segment {
+                            span_id: 2,
+                            start: 1,
+                            end: 7,
+                            width: 6,
+                        }.with_text("isn't "),
+                    ],
+                    hard_stop: false,
+                    ends_with_space: true,
+                },
+                Chunk {
+                    width: 3,
+                    segments: vec![
+                        // "it?\n"
+                        Segment {
+                            span_id: 2,
+                            start: 7,
+                            end: 11,
+                            width: 3,
+                        }.with_text("it?\n"),
+                    ],
+                    hard_stop: true,
+                    ends_with_space: false,
+                },
+                Chunk {
+                    width: 4,
+                    segments: vec![
+                        // "Yes "
+                        Segment {
+                            span_id: 2,
+                            start: 11,
+                            end: 15,
+                            width: 4,
+                        }.with_text("Yes "),
+                    ],
+                    hard_stop: false,
+                    ends_with_space: true,
+                },
+                Chunk {
+                    width: 8,
+                    segments: vec![
+                        // "indeed, "
+                        Segment {
+                            span_id: 2,
+                            start: 15,
+                            end: 23,
+                            width: 8,
+                        }.with_text("indeed, "),
+                    ],
+                    hard_stop: false,
+                    ends_with_space: true,
+                },
+                Chunk {
+                    width: 3,
+                    segments: vec![
+                        // "my "
+                        Segment {
+                            span_id: 2,
+                            start: 23,
+                            end: 26,
+                            width: 3,
+                        }.with_text("my "),
+                    ],
+                    hard_stop: false,
+                    ends_with_space: true,
+                },
+                Chunk {
+                    width: 14,
+                    segments: vec![
+                        // "Super"
+                        Segment {
+                            span_id: 3,
+                            start: 0,
+                            end: 5,
+                            width: 5,
+                        }.with_text("Super"),
+                        // "Captain !"
+                        Segment {
+                            span_id: 4,
+                            start: 0,
+                            end: 9,
+                            width: 9,
+                        }.with_text("Captain !"),
+                    ],
+                    hard_stop: false,
+                    ends_with_space: false,
+                }
+            ]
+        );
     }
 }