Struct Rope 

pub struct Rope { /* private fields */ }

An implementation of a rope data structure, composed of lines of owned strings. This is used to implement text controls in Servo.

Implementations

impl Rope

pub fn new(contents: impl Into<String>) -> Self

pub fn contents(&self) -> String

pub fn last_index(&self) -> RopeIndex

pub fn replace_range( &mut self, range: Range<RopeIndex>, string: impl Into<String>, ) -> RopeIndex

Replace the given range of RopeIndexs with the given string. Returns the RopeIndex of the end of the insertion.

pub fn slice<'a>( &'a self, start: Option<RopeIndex>, end: Option<RopeIndex>, ) -> RopeSlice<'a>

Create a RopeSlice for this Rope from start to end. If either of these is None, then the slice will extend to the extent of the rope.

pub fn chars<'a>(&'a self) -> RopeChars<'a>

pub fn is_empty(&self) -> bool

Return true if the Rope is empty or false otherwise. This will also return true if the contents of the Rope are a single empty line.

pub fn len_utf16(&self) -> Utf16CodeUnitLength

The total number of code units required to encode the content in utf16.

pub fn move_by( &self, origin: RopeIndex, unit: RopeMovement, amount: isize, ) -> RopeIndex

pub fn normalize_index(&self, rope_index: RopeIndex) -> RopeIndex

Given a RopeIndex, clamp it and ensure that it is on a character boundary, meaning that its indices are all bound by the actual size of the line and the number of lines in this Rope.

pub fn index_to_utf8_offset(&self, rope_index: RopeIndex) -> Utf8CodeUnitLength

Convert a RopeIndex into a byte offset from the start of the content.

pub fn index_to_utf16_offset( &self, rope_index: RopeIndex, ) -> Utf16CodeUnitLength

pub fn index_to_character_offset(&self, rope_index: RopeIndex) -> usize

Convert a RopeIndex into a character offset from the start of the content.

pub fn utf8_offset_to_rope_index( &self, utf8_offset: Utf8CodeUnitLength, ) -> RopeIndex

Convert a byte offset from the start of the content into a RopeIndex.

pub fn utf16_offset_to_utf8_offset( &self, utf16_offset: Utf16CodeUnitLength, ) -> Utf8CodeUnitLength

pub fn relevant_word_boundaries<'a>(&'a self, index: RopeIndex) -> RopeSlice<'a>

Find the boundaries of the word most relevant to the given RopeIndex. Word returned in order or precedence:

• If the index intersects the word or is the index directly preceding a word, the boundaries of that word are returned.
• The word preceding the cursor.
• If there is no word preceding the cursor, the start of the line to the end of the next word.

pub fn line_boundaries<'a>(&'a self, index: RopeIndex) -> RopeSlice<'a>

Return the boundaries of the line that contains the given RopeIndex.

Trait Implementations

impl MallocSizeOf for Rope

fn size_of(&self, ops: &mut MallocSizeOfOps) -> usize

Measure the heap usage of all descendant heap-allocated structures, but not the space taken up by the value itself.