Struct DeterministicTextMeasurer 

pub struct DeterministicTextMeasurer {
    pub char_width_factor: f64,
    pub line_height_factor: f64,
}

Fields

char_width_factor: f64

line_height_factor: f64

Implementations

impl DeterministicTextMeasurer

pub fn with_width_callback( self, width_px: impl Fn(&str, &TextStyle) -> f64 + Send + Sync + 'static, ) -> Arc<dyn TextMeasurer + Send + Sync>

Uses caller-supplied widths with Merman’s wrapping behavior.

Uses width_px to measure complete candidate strings while Merman retains its wrapping and line-height behavior. Vertical metrics and baseline offsets remain deterministic approximations; the callback does not provide glyph bounds or font ascent/descent. HTML candidates retain unselected U+00AD controls for shaping. The callback must measure their zero glyph advance without deleting the input controls before shaping.

The callback must return a finite, non-negative width in CSS pixels. Use crate::environment::HostTextMeasurer when measurement can fail or vary by operation.

pub fn normalized_text_lines(text: &str) -> Vec<String>

Trait Implementations

impl Clone for DeterministicTextMeasurer

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for DeterministicTextMeasurer

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

Formats the value using the given formatter.

impl Default for DeterministicTextMeasurer

fn default() -> Self

Returns the “default value” for a type.

impl TextMeasurer for DeterministicTextMeasurer

fn measure(&self, text: &str, style: &TextStyle) -> TextMetrics

fn measure_wrapped( &self, text: &str, style: &TextStyle, max_width: Option<f64>, wrap_mode: WrapMode, ) -> TextMetrics

fn measure_wrapped_with_raw_width( &self, text: &str, style: &TextStyle, max_width: Option<f64>, wrap_mode: WrapMode, ) -> (TextMetrics, Option<f64>)

Measures wrapped text and (optionally) returns the unwrapped width for the same payload.

fn measure_mermaid_calculate_text_dimensions( &self, text: &str, style: &TextStyle, ) -> TextMetrics

Measures one SVG row using Mermaid’s body-attached calculateTextDimensions(...) probe.

fn measure_svg_simple_text_bbox_height_px( &self, text: &str, style: &TextStyle, ) -> f64

Measures the bbox height for Mermaid drawSimpleText(...).getBBox().height-style probes.

fn measure_svg_tspan_text_bbox_height_px( &self, text: &str, style: &TextStyle, ) -> f64

Measures the bbox height of a <text> node whose visible rows are child <tspan> nodes.

fn measure_svg_text_computed_length_px( &self, text: &str, style: &TextStyle, ) -> f64

Measures SVG <tspan>.getComputedTextLength()-like widths (advance length along the baseline).

fn measure_svg_text_bbox_x(&self, text: &str, style: &TextStyle) -> (f64, f64)

Measures the horizontal extents of an SVG <text> element relative to its anchor x.

fn measure_svg_text_bbox_x_with_ascii_overhang( &self, text: &str, style: &TextStyle, ) -> (f64, f64)

Measures SVG <text>.getBBox() horizontal extents while including ASCII overhang.

fn measure_svg_title_bbox_x(&self, text: &str, style: &TextStyle) -> (f64, f64)

Measures the horizontal extents for Mermaid diagram titles rendered as a single <text> node (no whitespace-tokenized <tspan> runs).

fn measure_svg_simple_text_bbox_width_px( &self, text: &str, style: &TextStyle, ) -> f64

Measures the bbox width for Mermaid drawSimpleText(...).getBBox().width-style probes (used by upstream calculateTextWidth).

fn measure_svg_raw_text_bbox_width_px( &self, text: &str, style: &TextStyle, ) -> f64

Measures raw SVG <text>.getBBox().width for diagram renderers that append text directly.

fn measure_svg_raw_text_bbox_height_px( &self, text: &str, style: &TextStyle, ) -> f64

Measures raw SVG <text>.getBBox().height for direct text content.

fn measure_svg_raw_text_bbox_y_offset_px( &self, _text: &str, _style: &TextStyle, ) -> Option<f64>

Signed bbox Y of direct SVG text at baseline zero. None means this profile does not supply baseline facts; callers retain their established compatibility bounds.

fn measure_svg_raw_text_middle_bbox_y_offset_px( &self, _text: &str, _style: &TextStyle, ) -> Option<f64>

Signed bbox Y of direct SVG text with inherited dominant-baseline: middle. This is not the specially positioned Mermaid createFormattedText DOM.

fn measure_svg_raw_text_hanging_bbox_y_offset_px( &self, _text: &str, _style: &TextStyle, ) -> Option<f64>

Signed bbox Y of direct SVG text with inherited dominant-baseline: hanging.

fn measure_svg_text_bounding_client_rect_width_px( &self, text: &str, style: &TextStyle, ) -> f64

Measures the CSS pixel width returned by SVG <text>.getBoundingClientRect().width.

fn measure_svg_tspan_text_bbox_width_px( &self, text: &str, style: &TextStyle, ) -> f64

Measures a <text> node whose visible rows are emitted as child <tspan> elements.

fn measure_svg_preserved_tspan_text_bbox_width_px( &self, text: &str, style: &TextStyle, ) -> f64

Measures child <tspan> rows with explicit xml:space="preserve" semantics.

fn measure_svg_create_text_bbox_y_offset_px( &self, _text: &str, _style: &TextStyle, ) -> f64

Measures the getBBox().y offset of Mermaid’s createFormattedText(...) SVG label.

fn measure_svg_create_text_middle_bbox_y_offset_px( &self, _text: &str, _style: &TextStyle, ) -> f64

Measures the same createFormattedText(...) bbox y offset after the outer Architecture label container applies inherited dominant-baseline: middle.

fn measure_svg_simple_text_bbox_width_for_wrap_px( &self, text: &str, style: &TextStyle, ) -> f64

Measures simple SVG text for wrap decisions.

fn measure_canvas_text_width_px(&self, text: &str, style: &TextStyle) -> f64

Measures Canvas2D measureText(...).width for canvas-backed layout engines.