Struct TextRunSegment

pub(crate) struct TextRunSegment {
    pub font_index: usize,
    pub script: Script,
    pub bidi_level: Level,
    pub range: Range<usize>,
    pub break_at_start: bool,
    pub runs: Vec<GlyphRun>,
}

Fields

font_index: usize

The index of this font in the parent super::InlineFormattingContext’s collection of font information.

script: Script

The Script of this segment.

bidi_level: Level

The bidi Level of this segment.

range: Range<usize>

The range of bytes in the parent super::InlineFormattingContext’s text content.

break_at_start: bool

Whether or not the linebreaker said that we should allow a line break at the start of this segment.

runs: Vec<GlyphRun>

The shaped runs within this segment.

Implementations

impl TextRunSegment

fn new( font_index: usize, script: Script, bidi_level: Level, start_offset: usize, ) -> Self

fn update_if_compatible( &mut self, new_font: &FontRef, script: Script, bidi_level: Level, fonts: &[FontKeyAndMetrics], font_context: &FontContext, rendering_group_id: RenderingGroupId, ) -> bool

Update this segment if the Font and Script are compatible. The update will only ever make the Script specific. Returns true if the new Font and Script are compatible with this segment or false otherwise.

fn layout_into_line_items( &self, text_run: &TextRun, soft_wrap_policy: SegmentStartSoftWrapPolicy, ifc: &mut InlineFormattingContextLayout<'_>, )

fn shape_and_push_range( &mut self, range: &Range<usize>, formatting_context_text: &str, segment_font: &FontRef, options: &ShapingOptions, )

fn shape_text( &mut self, parent_style: &ComputedValues, formatting_context_text: &str, linebreaker: &mut LineBreaker, shaping_options: &ShapingOptions, font: FontRef, )

Shape the text of this TextRunSegment, first finding “words” for the shaper by processing the linebreaks found in the owning super::InlineFormattingContext. Linebreaks are filtered, based on the style of the parent inline box.

Trait Implementations

impl Debug for TextRunSegment

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl MallocSizeOf for TextRunSegment

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.