66 lines
1.8 KiB
Rust
66 lines
1.8 KiB
Rust
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use super::{cursor::Cursor, value::Value};
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pub struct Editor<'a> {
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value: &'a mut Value,
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cursor: &'a mut Cursor,
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}
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impl<'a> Editor<'a> {
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pub fn new(value: &'a mut Value, cursor: &'a mut Cursor) -> Editor<'a> {
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Editor { value, cursor }
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}
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#[must_use]
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pub fn contents(&self) -> String {
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self.value.to_string()
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}
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pub fn insert(&mut self, character: char) {
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if let Some((left, right)) = self.cursor.selection(self.value) {
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self.cursor.move_left(self.value);
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self.value.remove_many(left, right);
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}
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self.value.insert(self.cursor.end(self.value), character);
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self.cursor.move_right(self.value);
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}
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pub fn paste(&mut self, content: Value) {
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let length = content.len();
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if let Some((left, right)) = self.cursor.selection(self.value) {
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self.cursor.move_left(self.value);
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self.value.remove_many(left, right);
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}
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self.value.insert_many(self.cursor.end(self.value), content);
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self.cursor.move_right_by_amount(self.value, length);
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}
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pub fn backspace(&mut self) {
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if let Some((start, end)) = self.cursor.selection(self.value) {
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self.cursor.move_left(self.value);
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self.value.remove_many(start, end);
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} else {
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let start = self.cursor.start(self.value);
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if start > 0 {
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self.cursor.move_left(self.value);
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self.value.remove(start - 1);
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}
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}
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}
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pub fn delete(&mut self) {
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if self.cursor.selection(self.value).is_some() {
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self.backspace();
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} else {
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let end = self.cursor.end(self.value);
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if end < self.value.len() {
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self.value.remove(end);
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}
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}
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}
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}
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