Instance Method


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


func textStorage(_ str: NSTextStorage, edited editedMask: Int, range newCharRange: NSRange, changeInLength delta: Int, invalidatedRange invalidatedCharRange: NSRange)



The text storage whose information is invalidated.


Specifies the nature of the changes. Its value is made by combining with the C bitwise OR operator the constants described in “Change notifications” in NSTextStorage (editedAttributes and editedCharacters).


Indicates the extent of characters resulting from the edits.


If the NSTextStorageEditedCharacters bit of mask is set, gives the number of characters added to or removed from the original range (otherwise its value is irrelevant).


Represents the range of characters affected after attributes have been fixed. Is either equal to newCharRange or larger. For example, deleting a paragraph separator character invalidates the layout information for all characters in the paragraphs that precede and follow the separator.


This message is sent from the NSTextStorageobject’s processEditing() method to indicate that its characters or attributes have changed. This method invalidates glyphs and layout for the affected characters.

For example, after replacing “The” with “Several” to produce the string “Several files couldn’t be saved”, newCharRange is {0, 7} and delta is 4. The receiver uses this information to update its character-to-glyph mapping and to update the selection range based on the change.

The textStorage(_:edited:range:changeInLength:invalidatedRange:) messages are sent in a series to each NSLayoutManager object associated with the text storage object, so the layout managers receiving them shouldn’t edit aTextStorage while this method is executing. If one of them does, the newCharRange, delta, and invalidatedCharRange arguments are incorrect for all following layout managers that receive the message.

See Also



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.

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

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

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.

func glyph(at: Int) -> CGGlyph

Returns the glyph at glyphIndex.

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.

func replaceGlyph(at: Int, withGlyph: NSGlyph)

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

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

Fills the passed-in buffer with a sequence of glyphs

func deleteGlyphs(in: NSRange)

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

func setCharacterIndex(Int, forGlyphAt: Int)

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

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.

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.

func rectArray(forGlyphRange: NSRange, withinSelectedGlyphRange: 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 glyph range.


The layout manager’s current layout options.

var usesScreenFonts: Bool

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

func substituteFont(for: NSFont) -> NSFont

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