settings_ui: Add UI and buffer font weight controls (#15104)

This PR adds settings controls for the UI and buffer font weight
settings.

It also does some work around grouping the settings into related
sections.

Release Notes:

- N/A

crates/editor/src/editor_settings_controls.rs

@@ -0,0 +1,167 @@
+use gpui::{AppContext, FontWeight};
+use project::project_settings::{InlineBlameSettings, ProjectSettings};
+use settings::{EditableSettingControl, Settings};
+use theme::ThemeSettings;
+use ui::{
+    prelude::*, CheckboxWithLabel, ContextMenu, DropdownMenu, NumericStepper, SettingsContainer,
+    SettingsGroup,
+};
+
+#[derive(IntoElement)]
+pub struct EditorSettingsControls {}
+
+impl EditorSettingsControls {
+    pub fn new() -> Self {
+        Self {}
+    }
+}
+
+impl RenderOnce for EditorSettingsControls {
+    fn render(self, _cx: &mut WindowContext) -> impl IntoElement {
+        SettingsContainer::new()
+            .child(
+                SettingsGroup::new("Font")
+                    .child(BufferFontSizeControl)
+                    .child(BufferFontWeightControl),
+            )
+            .child(SettingsGroup::new("Editor").child(InlineGitBlameControl))
+    }
+}
+
+#[derive(IntoElement)]
+struct BufferFontSizeControl;
+
+impl EditableSettingControl for BufferFontSizeControl {
+    type Value = Pixels;
+    type Settings = ThemeSettings;
+
+    fn name(&self) -> SharedString {
+        "Buffer Font Size".into()
+    }
+
+    fn read(cx: &AppContext) -> Self::Value {
+        let settings = ThemeSettings::get_global(cx);
+        settings.buffer_font_size
+    }
+
+    fn apply(settings: &mut <Self::Settings as Settings>::FileContent, value: Self::Value) {
+        settings.buffer_font_size = Some(value.into());
+    }
+}
+
+impl RenderOnce for BufferFontSizeControl {
+    fn render(self, cx: &mut WindowContext) -> impl IntoElement {
+        let value = Self::read(cx);
+
+        h_flex()
+            .gap_2()
+            .child(Icon::new(IconName::FontSize))
+            .child(NumericStepper::new(
+                value.to_string(),
+                move |_, cx| {
+                    Self::write(value - px(1.), cx);
+                },
+                move |_, cx| {
+                    Self::write(value + px(1.), cx);
+                },
+            ))
+    }
+}
+
+#[derive(IntoElement)]
+struct BufferFontWeightControl;
+
+impl EditableSettingControl for BufferFontWeightControl {
+    type Value = FontWeight;
+    type Settings = ThemeSettings;
+
+    fn name(&self) -> SharedString {
+        "Buffer Font Weight".into()
+    }
+
+    fn read(cx: &AppContext) -> Self::Value {
+        let settings = ThemeSettings::get_global(cx);
+        settings.buffer_font.weight
+    }
+
+    fn apply(settings: &mut <Self::Settings as Settings>::FileContent, value: Self::Value) {
+        settings.buffer_font_weight = Some(value.0);
+    }
+}
+
+impl RenderOnce for BufferFontWeightControl {
+    fn render(self, cx: &mut WindowContext) -> impl IntoElement {
+        let value = Self::read(cx);
+
+        h_flex()
+            .gap_2()
+            .child(Icon::new(IconName::FontWeight))
+            .child(DropdownMenu::new(
+                "buffer-font-weight",
+                value.0.to_string(),
+                ContextMenu::build(cx, |mut menu, _cx| {
+                    for weight in FontWeight::ALL {
+                        menu = menu.custom_entry(
+                            move |_cx| Label::new(weight.0.to_string()).into_any_element(),
+                            {
+                                move |cx| {
+                                    Self::write(weight, cx);
+                                }
+                            },
+                        )
+                    }
+
+                    menu
+                }),
+            ))
+    }
+}
+
+#[derive(IntoElement)]
+struct InlineGitBlameControl;
+
+impl EditableSettingControl for InlineGitBlameControl {
+    type Value = bool;
+    type Settings = ProjectSettings;
+
+    fn name(&self) -> SharedString {
+        "Inline Git Blame".into()
+    }
+
+    fn read(cx: &AppContext) -> Self::Value {
+        let settings = ProjectSettings::get_global(cx);
+        settings.git.inline_blame_enabled()
+    }
+
+    fn apply(settings: &mut <Self::Settings as Settings>::FileContent, value: Self::Value) {
+        if let Some(inline_blame) = settings.git.inline_blame.as_mut() {
+            inline_blame.enabled = value;
+        } else {
+            settings.git.inline_blame = Some(InlineBlameSettings {
+                enabled: false,
+                ..Default::default()
+            });
+        }
+    }
+}
+
+impl RenderOnce for InlineGitBlameControl {
+    fn render(self, cx: &mut WindowContext) -> impl IntoElement {
+        let value = Self::read(cx);
+
+        CheckboxWithLabel::new(
+            "inline-git-blame",
+            Label::new(self.name()),
+            value.into(),
+            |selection, cx| {
+                Self::write(
+                    match selection {
+                        Selection::Selected => true,
+                        Selection::Unselected | Selection::Indeterminate => false,
+                    },
+                    cx,
+                );
+            },
+        )
+    }
+}