Factor out LabelLike to share common label styles (#3510)

This PR factors out a new `LabelLike` component to share common styles
between the `Label` and `HighlightedLabel` components.

Release Notes:

- N/A

crates/ui2/src/components/label.rs

@@ -1,183 +1,7 @@
-use std::ops::Range;
+mod highlighted_label;
+mod label;
+mod label_like;
 
-use crate::prelude::*;
-use crate::styled_ext::StyledExt;
-use gpui::{relative, Div, HighlightStyle, IntoElement, StyledText, WindowContext};
-
-#[derive(Debug, PartialEq, Eq, PartialOrd, Ord, Hash, Clone, Copy, Default)]
-pub enum LabelSize {
-    #[default]
-    Default,
-    Small,
-}
-
-#[derive(Default, PartialEq, Copy, Clone)]
-pub enum LineHeightStyle {
-    #[default]
-    TextLabel,
-    /// Sets the line height to 1
-    UILabel,
-}
-
-#[derive(IntoElement, Clone)]
-pub struct Label {
-    label: SharedString,
-    size: LabelSize,
-    line_height_style: LineHeightStyle,
-    color: Color,
-    strikethrough: bool,
-}
-
-impl RenderOnce for Label {
-    type Rendered = Div;
-
-    fn render(self, cx: &mut WindowContext) -> Self::Rendered {
-        div()
-            .when(self.strikethrough, |this| {
-                this.relative().child(
-                    div()
-                        .absolute()
-                        .top_1_2()
-                        .w_full()
-                        .h_px()
-                        .bg(Color::Hidden.color(cx)),
-                )
-            })
-            .map(|this| match self.size {
-                LabelSize::Default => this.text_ui(),
-                LabelSize::Small => this.text_ui_sm(),
-            })
-            .when(self.line_height_style == LineHeightStyle::UILabel, |this| {
-                this.line_height(relative(1.))
-            })
-            .text_color(self.color.color(cx))
-            .child(self.label.clone())
-    }
-}
-
-impl Label {
-    pub fn new(label: impl Into<SharedString>) -> Self {
-        Self {
-            label: label.into(),
-            size: LabelSize::Default,
-            line_height_style: LineHeightStyle::default(),
-            color: Color::Default,
-            strikethrough: false,
-        }
-    }
-
-    pub fn size(mut self, size: LabelSize) -> Self {
-        self.size = size;
-        self
-    }
-
-    pub fn color(mut self, color: Color) -> Self {
-        self.color = color;
-        self
-    }
-
-    pub fn line_height_style(mut self, line_height_style: LineHeightStyle) -> Self {
-        self.line_height_style = line_height_style;
-        self
-    }
-
-    pub fn set_strikethrough(mut self, strikethrough: bool) -> Self {
-        self.strikethrough = strikethrough;
-        self
-    }
-}
-
-#[derive(IntoElement)]
-pub struct HighlightedLabel {
-    label: SharedString,
-    size: LabelSize,
-    color: Color,
-    highlight_indices: Vec<usize>,
-    strikethrough: bool,
-}
-
-impl RenderOnce for HighlightedLabel {
-    type Rendered = Div;
-
-    fn render(self, cx: &mut WindowContext) -> Self::Rendered {
-        let highlight_color = cx.theme().colors().text_accent;
-
-        let mut highlight_indices = self.highlight_indices.iter().copied().peekable();
-        let mut highlights: Vec<(Range<usize>, HighlightStyle)> = Vec::new();
-
-        while let Some(start_ix) = highlight_indices.next() {
-            let mut end_ix = start_ix;
-
-            loop {
-                end_ix = end_ix + self.label[end_ix..].chars().next().unwrap().len_utf8();
-                if let Some(&next_ix) = highlight_indices.peek() {
-                    if next_ix == end_ix {
-                        end_ix = next_ix;
-                        highlight_indices.next();
-                        continue;
-                    }
-                }
-                break;
-            }
-
-            highlights.push((
-                start_ix..end_ix,
-                HighlightStyle {
-                    color: Some(highlight_color),
-                    ..Default::default()
-                },
-            ));
-        }
-
-        let mut text_style = cx.text_style().clone();
-        text_style.color = self.color.color(cx);
-
-        div()
-            .flex()
-            .when(self.strikethrough, |this| {
-                this.relative().child(
-                    div()
-                        .absolute()
-                        .top_px()
-                        .my_auto()
-                        .w_full()
-                        .h_px()
-                        .bg(Color::Hidden.color(cx)),
-                )
-            })
-            .map(|this| match self.size {
-                LabelSize::Default => this.text_ui(),
-                LabelSize::Small => this.text_ui_sm(),
-            })
-            .child(StyledText::new(self.label).with_highlights(&text_style, highlights))
-    }
-}
-
-impl HighlightedLabel {
-    /// shows a label with the given characters highlighted.
-    /// characters are identified by utf8 byte position.
-    pub fn new(label: impl Into<SharedString>, highlight_indices: Vec<usize>) -> Self {
-        Self {
-            label: label.into(),
-            size: LabelSize::Default,
-            color: Color::Default,
-            highlight_indices,
-            strikethrough: false,
-        }
-    }
-
-    pub fn size(mut self, size: LabelSize) -> Self {
-        self.size = size;
-        self
-    }
-
-    pub fn color(mut self, color: Color) -> Self {
-        self.color = color;
-        self
-    }
-
-    pub fn set_strikethrough(mut self, strikethrough: bool) -> Self {
-        self.strikethrough = strikethrough;
-        self
-    }
-}
+pub use highlighted_label::*;
+pub use label::*;
+pub use label_like::*;