apple.uikit.protocol

Interface NSTextAttachmentLayout

All Known Implementing Classes:

NSTextAttachment

public interface NSTextAttachmentLayout

This protocol defines the interface to attachment objects from NSTextLayoutManager

Method Summary

Modifier and Type	Method and Description
CGRect	attachmentBoundsForAttributesLocationTextContainerProposedLineFragmentPosition(NSDictionary<java.lang.String,?> attributes, NSTextLocation location, NSTextContainer textContainer, CGRect proposedLineFragment, CGPoint position) Returns the layout bounds.
UIImage	imageForBoundsAttributesLocationTextContainer(CGRect bounds, NSDictionary<java.lang.String,?> attributes, NSTextLocation location, NSTextContainer textContainer) Returns the image object rendered at bounds inside textContainer.
NSTextAttachmentViewProvider	viewProviderForParentViewLocationTextContainer(UIView parentView, NSTextLocation location, NSTextContainer textContainer) Returns the text attachment view provider corresponding to -fileType.

Method Detail

attachmentBoundsForAttributesLocationTextContainerProposedLineFragmentPosition

CGRect attachmentBoundsForAttributesLocationTextContainerProposedLineFragmentPosition(NSDictionary<java.lang.String,?> attributes,
                                                                                      NSTextLocation location,
                                                                                      NSTextContainer textContainer,
                                                                                      CGRect proposedLineFragment,
                                                                                      CGPoint position)

Returns the layout bounds. The bounds origin is interpreted to match position inside proposedLineFragment. The NSTextAttachment implementation returns -bounds if not CGRectZero; otherwise, it derives the bounds value from image.size. Conforming objects can implement more sophisticated logic for negotiating the frame size based on the available container space and proposed line fragment rect.

imageForBoundsAttributesLocationTextContainer

UIImage imageForBoundsAttributesLocationTextContainer(CGRect bounds,
                                                      NSDictionary<java.lang.String,?> attributes,
                                                      NSTextLocation location,
                                                      NSTextContainer textContainer)

Returns the image object rendered at bounds inside textContainer. It should return an image appropriate for the target rendering context derived by arguments to this method. The NSTextAttachment implementation returns -image when non-nil. If -image==nil, it returns an image based on -contents and -fileType properties.

viewProviderForParentViewLocationTextContainer

NSTextAttachmentViewProvider viewProviderForParentViewLocationTextContainer(UIView parentView,
                                                                            NSTextLocation location,
                                                                            NSTextContainer textContainer)

Returns the text attachment view provider corresponding to -fileType. The default implementation queries the text attachment view provider class via +[NSTextAttachment textAttachmentViewProviderClassForFileType:]. When non-nil, it instantiates a view, then, fills properties declared in NSTextAttachmentViewProvider if implemented