layout

type CombinedPos struct {
	// runes is the offset in runes.
	Runes   int
	LineCol ScreenPos
	// Pixel coordinates
	X               fixed.Int26_6
	Y               int
	Ascent, Descent fixed.Int26_6

	// RunIndex tracks which run this position is within, counted each time
	// we processes an end of run marker.
	RunIndex int
	// towardOrigin tracks whether this glyph's run is progressing toward the
	// origin or away from it.
	TowardOrigin bool
}

type Line struct {
	XOff    fixed.Int26_6
	YOff    int
	Width   fixed.Int26_6
	Ascent  fixed.Int26_6
	Descent fixed.Int26_6
	Glyphs  []*text.Glyph
	// runes is the number of runes represented by this line.
	Runes int
	// runeOff tracks the rune offset of the first rune of the line in the document.
	RuneOff int
}

type Paragraph struct {
	StartX fixed.Int26_6
	StartY int
	EndX   fixed.Int26_6
	EndY   int
	// Runes is the number of runes represented by this paragraph.
	Runes int
	// RuneOff tracks the rune offset of the first rune of the paragraph in the document.
	RuneOff int
}

type Region struct {
	// Bounds is the coordinates of the bounding box relative to the containing
	// widget.
	Bounds image.Rectangle
	// Baseline is the quantity of vertical pixels between the baseline and
	// the bottom of bounds.
	Baseline int
}

type ScreenPos struct {
	// col is the column, measured in runes.
	Col  int
	Line int
}

type TextLayout struct {

	// Positions contain all possible caret positions, sorted by rune index.
	Positions []CombinedPos
	// lines contain metadata about the size and position of each line of
	// text on the screen.
	Lines []Line
	// Paragraphs contain size and position of each paragraph of text on the screen.
	Paragraphs []Paragraph
	// Graphemes tracks the indices of grapheme cluster boundaries within text source.
	Graphemes []int
	// contains filtered or unexported fields
}