Struct PatchGroup 

pub struct PatchGroup<'a> { /* private fields */ }

A group of patches derived from a single IFT font.

This is a group which can be applied simultaneously to that font. Patches are initially missing data which must be fetched and supplied to patch application method.

Also optionally includes a list of patches which are not compatible but have been requested to be preloaded.

Implementations

impl PatchGroup<'_>

pub fn select_next_patches<'b>( ift_font: FontRef<'b>, patch_data: &HashMap<PatchUrl, UrlStatus>, subset_definition: &SubsetDefinition, ) -> Result<PatchGroup<'b>, ReadError>

Intersect the available and unapplied patches in ift_font against subset_definition

patch_data provides any patch data that has been previously loaded, keyed by patch url. May be empty if no patch data is loaded yet.

Returns a group of patches which would be applied next.

pub fn urls(&self) -> impl Iterator<Item = &PatchUrl>

Returns an iterator over URLs in this group.

pub fn has_urls(&self) -> bool

Returns true if there is at least one url associated with this group.

pub fn next_invalidating_patch(&self) -> Option<&PatchInfo>

pub fn apply_next_patches( self, patch_data: &mut HashMap<PatchUrl, UrlStatus>, ) -> Result<Vec<u8>, PatchingError>

Attempt to apply the next patch (or patches if non-invalidating) listed in this group.

Returns the bytes of the updated font.

pub fn apply_next_patches_with_decoder<D: SharedBrotliDecoder>( self, patch_data: &mut HashMap<PatchUrl, UrlStatus>, brotli_decoder: &D, ) -> Result<Vec<u8>, PatchingError>

Attempt to apply the next patch (or patches if non-invalidating) listed in this group.

Returns the bytes of the updated font.

Trait Implementations

impl<'a> Clone for PatchGroup<'a>

fn clone(&self) -> PatchGroup<'a>

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PatchGroup<'_>

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

Formats the value using the given formatter.