Styling option for separating terminal view background from background color (#17611)

Closes #17313

Release Notes:

- Added theme styling option to separate terminal background view from
terminal background color, for transparent terminal backgrounds

crates/theme/src/default_colors.rs

@@ -84,6 +84,7 @@ impl ThemeColors {
             terminal_foreground: black().light().step_12(),
             terminal_bright_foreground: black().light().step_11(),
             terminal_dim_foreground: black().light().step_10(),
+            terminal_ansi_background: neutral().light().step_1(),
             terminal_ansi_bright_black: black().light().step_11(),
             terminal_ansi_bright_red: red().light().step_10(),
             terminal_ansi_bright_green: green().light().step_10(),
@@ -179,6 +180,7 @@ impl ThemeColors {
             editor_document_highlight_read_background: neutral().dark_alpha().step_4(),
             editor_document_highlight_write_background: neutral().dark_alpha().step_4(),
             terminal_background: neutral().dark().step_1(),
+            terminal_ansi_background: neutral().dark().step_1(),
             terminal_foreground: white().dark().step_12(),
             terminal_bright_foreground: white().dark().step_11(),
             terminal_dim_foreground: white().dark().step_10(),

crates/theme/src/one_themes.rs

@@ -105,6 +105,7 @@ pub(crate) fn one_dark() -> Theme {
 
                 terminal_background: bg,
                 // todo("Use one colors for terminal")
+                terminal_ansi_background: crate::black().dark().step_12(),
                 terminal_foreground: crate::white().dark().step_12(),
                 terminal_bright_foreground: crate::white().dark().step_11(),
                 terminal_dim_foreground: crate::white().dark().step_10(),

crates/theme/src/schema.rs

@@ -421,6 +421,10 @@ pub struct ThemeColorsContent {
     #[serde(rename = "terminal.foreground")]
     pub terminal_foreground: Option<String>,
 
+    /// Terminal ansi background color.
+    #[serde(rename = "terminal.ansi.background")]
+    pub terminal_ansi_background: Option<String>,
+
     /// Bright terminal foreground color.
     #[serde(rename = "terminal.bright_foreground")]
     pub terminal_bright_foreground: Option<String>,
@@ -792,6 +796,10 @@ impl ThemeColorsContent {
                 .terminal_background
                 .as_ref()
                 .and_then(|color| try_parse_color(color).ok()),
+            terminal_ansi_background: self
+                .terminal_ansi_background
+                .as_ref()
+                .and_then(|color| try_parse_color(color).ok()),
             terminal_foreground: self
                 .terminal_foreground
                 .as_ref()

crates/theme/src/styles/colors.rs

@@ -175,7 +175,7 @@ pub struct ThemeColors {
     // ===
     // Terminal
     // ===
-    /// Terminal background color.
+    /// Terminal layout background color.
     pub terminal_background: Hsla,
     /// Terminal foreground color.
     pub terminal_foreground: Hsla,
@@ -184,6 +184,9 @@ pub struct ThemeColors {
     /// Dim terminal foreground color.
     pub terminal_dim_foreground: Hsla,
 
+    /// Terminal ansi background color.
+    pub terminal_ansi_background: Hsla,
+
     /// Black ANSI terminal color.
     pub terminal_ansi_black: Hsla,
     /// Bright black ANSI terminal color.