Instance Method

rectArray(forGlyphRange:withinSelectedGlyphRange:in:rectCount:)

Returns an array of rectangles and, by reference, the number of such rectangles, that define the region in the given container enclosing the given glyph range.

Declaration

func rectArray(forGlyphRange glyphRange: NSRange, withinSelectedGlyphRange selGlyphRange: NSRange, in container: NSTextContainer, rectCount: UnsafeMutablePointer<Int>) -> NSRectArray?

Parameters

glyphRange

The glyph range for which to return rectangles.

selGlyphRange

Selected glyphs within glyphRange, which can affect the size of the rectangles; it must be equal to or contain glyphRange. If the caller is interested in this more from an enclosing point of view rather than a selection point of view, pass {NSNotFound, 0} as the selected range.

container

The text container in which the text is laid out.

rectCount

The number of rectangles returned.

Return Value

The array of rectangles enclosing the given range.

Discussion

These rectangles can be used to draw the text background or highlight for the given range of characters. If a selected range is given in selGlyphRange, the rectangles returned are correct for drawing the selection. Selection rectangles are generally more complicated than enclosing rectangles and supplying a selected range is the clue this method uses to determine whether to go to the trouble of doing this special work.

The number of rectangles returned isn’t necessarily the number of lines enclosing the specified range. Contiguous lines can share an enclosing rectangle, and lines broken into several fragments have a separate enclosing rectangle for each fragment.

This method will do the minimum amount of work required to answer the question. The resulting array is owned by the layout manager and will be reused when this method, rectArray(forCharacterRange:withinSelectedCharacterRange:in:rectCount:), or boundingRect(forGlyphRange:in:) is called. One of these methods may be called indirectly. If you aren't going to use the rectangles right away, you should copy them to another location. These rectangles are always in container coordinates.

The purpose of this method is to calculate line rectangles for drawing the text background and highlighting. These rectangles don’t necessarily enclose glyphs that draw outside their line fragment rectangles; use boundingRect(forGlyphRange:in:) to determine the area that contains all drawing performed for a range of glyphs.

Performs glyph generation and layout if needed.

See Also

Deprecated

attributedString

The text storage object from which the NSGlyphGenerator object procures characters for glyph generation.

func invalidateGlyphs(onLayoutInvalidationForGlyphRange: NSRange)

Specifies explicitly when portions of the glyph stream depend on layout.

Deprecated
func invalidateLayout(forCharacterRange: NSRange, isSoft: Bool, actualCharacterRange: NSRangePointer?)

Invalidates the layout information for the glyphs mapped to the given range of characters.

Deprecated
func textStorage(NSTextStorage, edited: Int, range: NSRange, changeInLength: Int, invalidatedRange: NSRange)

Invalidates glyph and layout information for a portion of the text in the given text storage object.

Deprecated
func insertGlyph(NSGlyph, atGlyphIndex: Int, characterIndex: Int)

Inserts a single glyph into the glyph stream at the given index and maps it to the character at the given character index.

Deprecated
func glyph(at: Int) -> CGGlyph

Returns the glyph at glyphIndex.

Deprecated
func glyph(at: Int, isValidIndex: UnsafeMutablePointer<ObjCBool>?) -> CGGlyph

If the given index is valid, returns the glyph at that location and optionally returns a flag indicating whether the requested index is in range.

Deprecated
func replaceGlyph(at: Int, withGlyph: NSGlyph)

Replaces the glyph at the given index with a new glyph.

Deprecated
func getGlyphs(UnsafeMutablePointer<NSGlyph>?, range: NSRange) -> Int

Fills the passed-in buffer with a sequence of glyphs

Deprecated
func deleteGlyphs(in: NSRange)

Deletes the glyphs in the given range from the receiver’s glyph store.

Deprecated
func setCharacterIndex(Int, forGlyphAt: Int)

Sets the index of the character corresponding to the glyph at the given glyph index.

Deprecated
func intAttribute(Int, forGlyphAt: Int) -> Int

Returns the value of the attribute identified by the given attribute tag for the glyph at the given index.

Deprecated
func rectArray(forCharacterRange: NSRange, withinSelectedCharacterRange: NSRange, in: NSTextContainer, rectCount: UnsafeMutablePointer<Int>) -> NSRectArray?

Returns an array of rectangles and, by reference, the number of such rectangles, that define the region in the given container enclosing the given character range.

Deprecated
layoutOptions

The layout manager’s current layout options.

var usesScreenFonts: Bool

A Boolean that controls using screen fonts to calculate layout and display text.

Deprecated
func substituteFont(for: NSFont) -> NSFont

Returns a screen font suitable for use in place of the given font, if one is available.

Deprecated