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support range selection in assist docs

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This commit is contained in:
Aleksey Kladov 2019-10-26 19:58:18 +03:00
parent 733fd64260
commit 4a83aae098
5 changed files with 85 additions and 9 deletions
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34
crates/test_utils/src/lib.rs
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@ -1,4 +1,10 @@
//! FIXME: write short doc here
//! Assorted testing utilities.
//!
//! Most notable things are:
//!
//! * Rich text comparison, which outputs a diff.
//! * Extracting markup (mainly, `<|>` markers) out of fixture strings.
//! * marks (see the eponymous module).
#[macro_use]
pub mod marks;
@ -43,7 +49,7 @@ pub fn extract_offset(text: &str) -> (TextUnit, String) {
}
}
pub fn try_extract_offset(text: &str) -> Option<(TextUnit, String)> {
fn try_extract_offset(text: &str) -> Option<(TextUnit, String)> {
let cursor_pos = text.find(CURSOR_MARKER)?;
let mut new_text = String::with_capacity(text.len() - CURSOR_MARKER.len());
new_text.push_str(&text[..cursor_pos]);
@ -59,12 +65,34 @@ pub fn extract_range(text: &str) -> (TextRange, String) {
}
}
pub fn try_extract_range(text: &str) -> Option<(TextRange, String)> {
fn try_extract_range(text: &str) -> Option<(TextRange, String)> {
let (start, text) = try_extract_offset(text)?;
let (end, text) = try_extract_offset(&text)?;
Some((TextRange::from_to(start, end), text))
}
pub enum RangeOrOffset {
Range(TextRange),
Offset(TextUnit),
}
impl From<RangeOrOffset> for TextRange {
fn from(selection: RangeOrOffset) -> Self {
match selection {
RangeOrOffset::Range(it) => it,
RangeOrOffset::Offset(it) => TextRange::from_to(it, it),
}
}
}
pub fn extract_range_or_offset(text: &str) -> (RangeOrOffset, String) {
if let Some((range, text)) = try_extract_range(text) {
return (RangeOrOffset::Range(range), text);
}
let (offset, text) = extract_offset(text);
(RangeOrOffset::Offset(offset), text)
}
/// Extracts ranges, marked with `<tag> </tag>` paris from the `text`
pub fn extract_ranges(mut text: &str, tag: &str) -> (Vec<TextRange>, String) {
let open = format!("<{}>", tag);