feat: add theme configuration for ghostty-web terminal

- Add 8 predefined themes: dark, light, dracula, catppuccin, nord, gruvbox, solarized, tokyo
- Support data-theme attribute for theme selection
- Support custom JSON themes via data-theme attribute
- Set dark theme as default
- Export THEMES object for programmatic access

pyproject.toml

@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "textual-webterm"
-version = "0.5.0"
+version = "0.5.1"
 description = "Serve terminal sessions over the web"
 authors = ["Will McGugan <will@textualize.io>"]
 license = "MIT"

src/textual_webterm/static/js/terminal.ts

@@ -14,6 +14,195 @@ const DEFAULT_FONT_FAMILY =
   '"Fira Code", "Roboto Mono", Menlo, Monaco, Consolas, "Liberation Mono", ' +
   '"DejaVu Sans Mono", "Courier New", monospace';
 
+/** Predefined terminal themes */
+const THEMES: Record<string, ITheme> = {
+  // Dark themes
+  dark: {
+    background: "#1e1e1e",
+    foreground: "#d4d4d4",
+    cursor: "#aeafad",
+    cursorAccent: "#1e1e1e",
+    selection: "#264f78",
+    black: "#000000",
+    red: "#cd3131",
+    green: "#0dbc79",
+    yellow: "#e5e510",
+    blue: "#2472c8",
+    magenta: "#bc3fbc",
+    cyan: "#11a8cd",
+    white: "#e5e5e5",
+    brightBlack: "#666666",
+    brightRed: "#f14c4c",
+    brightGreen: "#23d18b",
+    brightYellow: "#f5f543",
+    brightBlue: "#3b8eea",
+    brightMagenta: "#d670d6",
+    brightCyan: "#29b8db",
+    brightWhite: "#ffffff",
+  },
+  light: {
+    background: "#ffffff",
+    foreground: "#383a42",
+    cursor: "#526eff",
+    cursorAccent: "#ffffff",
+    selection: "#add6ff",
+    black: "#000000",
+    red: "#e45649",
+    green: "#50a14f",
+    yellow: "#c18401",
+    blue: "#4078f2",
+    magenta: "#a626a4",
+    cyan: "#0184bc",
+    white: "#a0a1a7",
+    brightBlack: "#5c6370",
+    brightRed: "#e06c75",
+    brightGreen: "#98c379",
+    brightYellow: "#d19a66",
+    brightBlue: "#61afef",
+    brightMagenta: "#c678dd",
+    brightCyan: "#56b6c2",
+    brightWhite: "#ffffff",
+  },
+  dracula: {
+    background: "#282a36",
+    foreground: "#f8f8f2",
+    cursor: "#f8f8f2",
+    cursorAccent: "#282a36",
+    selection: "#44475a",
+    black: "#21222c",
+    red: "#ff5555",
+    green: "#50fa7b",
+    yellow: "#f1fa8c",
+    blue: "#bd93f9",
+    magenta: "#ff79c6",
+    cyan: "#8be9fd",
+    white: "#f8f8f2",
+    brightBlack: "#6272a4",
+    brightRed: "#ff6e6e",
+    brightGreen: "#69ff94",
+    brightYellow: "#ffffa5",
+    brightBlue: "#d6acff",
+    brightMagenta: "#ff92df",
+    brightCyan: "#a4ffff",
+    brightWhite: "#ffffff",
+  },
+  catppuccin: {
+    background: "#1e1e2e",
+    foreground: "#cdd6f4",
+    cursor: "#f5e0dc",
+    cursorAccent: "#1e1e2e",
+    selection: "#45475a",
+    black: "#45475a",
+    red: "#f38ba8",
+    green: "#a6e3a1",
+    yellow: "#f9e2af",
+    blue: "#89b4fa",
+    magenta: "#f5c2e7",
+    cyan: "#94e2d5",
+    white: "#bac2de",
+    brightBlack: "#585b70",
+    brightRed: "#f38ba8",
+    brightGreen: "#a6e3a1",
+    brightYellow: "#f9e2af",
+    brightBlue: "#89b4fa",
+    brightMagenta: "#f5c2e7",
+    brightCyan: "#94e2d5",
+    brightWhite: "#a6adc8",
+  },
+  nord: {
+    background: "#2e3440",
+    foreground: "#d8dee9",
+    cursor: "#d8dee9",
+    cursorAccent: "#2e3440",
+    selection: "#434c5e",
+    black: "#3b4252",
+    red: "#bf616a",
+    green: "#a3be8c",
+    yellow: "#ebcb8b",
+    blue: "#81a1c1",
+    magenta: "#b48ead",
+    cyan: "#88c0d0",
+    white: "#e5e9f0",
+    brightBlack: "#4c566a",
+    brightRed: "#bf616a",
+    brightGreen: "#a3be8c",
+    brightYellow: "#ebcb8b",
+    brightBlue: "#81a1c1",
+    brightMagenta: "#b48ead",
+    brightCyan: "#8fbcbb",
+    brightWhite: "#eceff4",
+  },
+  gruvbox: {
+    background: "#282828",
+    foreground: "#ebdbb2",
+    cursor: "#ebdbb2",
+    cursorAccent: "#282828",
+    selection: "#504945",
+    black: "#282828",
+    red: "#cc241d",
+    green: "#98971a",
+    yellow: "#d79921",
+    blue: "#458588",
+    magenta: "#b16286",
+    cyan: "#689d6a",
+    white: "#a89984",
+    brightBlack: "#928374",
+    brightRed: "#fb4934",
+    brightGreen: "#b8bb26",
+    brightYellow: "#fabd2f",
+    brightBlue: "#83a598",
+    brightMagenta: "#d3869b",
+    brightCyan: "#8ec07c",
+    brightWhite: "#ebdbb2",
+  },
+  solarized: {
+    background: "#002b36",
+    foreground: "#839496",
+    cursor: "#839496",
+    cursorAccent: "#002b36",
+    selection: "#073642",
+    black: "#073642",
+    red: "#dc322f",
+    green: "#859900",
+    yellow: "#b58900",
+    blue: "#268bd2",
+    magenta: "#d33682",
+    cyan: "#2aa198",
+    white: "#eee8d5",
+    brightBlack: "#586e75",
+    brightRed: "#cb4b16",
+    brightGreen: "#586e75",
+    brightYellow: "#657b83",
+    brightBlue: "#839496",
+    brightMagenta: "#6c71c4",
+    brightCyan: "#93a1a1",
+    brightWhite: "#fdf6e3",
+  },
+  tokyo: {
+    background: "#1a1b26",
+    foreground: "#a9b1d6",
+    cursor: "#c0caf5",
+    cursorAccent: "#1a1b26",
+    selection: "#33467c",
+    black: "#15161e",
+    red: "#f7768e",
+    green: "#9ece6a",
+    yellow: "#e0af68",
+    blue: "#7aa2f7",
+    magenta: "#bb9af7",
+    cyan: "#7dcfff",
+    white: "#a9b1d6",
+    brightBlack: "#414868",
+    brightRed: "#f7768e",
+    brightGreen: "#9ece6a",
+    brightYellow: "#e0af68",
+    brightBlue: "#7aa2f7",
+    brightMagenta: "#bb9af7",
+    brightCyan: "#7dcfff",
+    brightWhite: "#c0caf5",
+  },
+};
+
 /** Configuration options passed via data attributes or window config */
 interface TerminalConfig {
   fontFamily?: string;
@@ -35,6 +224,19 @@ function parseConfig(element: HTMLElement): TerminalConfig {
   if (element.dataset.scrollback) {
     config.scrollback = parseInt(element.dataset.scrollback, 10);
   }
+  if (element.dataset.theme) {
+    const themeName = element.dataset.theme.toLowerCase();
+    if (themeName in THEMES) {
+      config.theme = THEMES[themeName];
+    } else {
+      // Try parsing as JSON for custom themes
+      try {
+        config.theme = JSON.parse(element.dataset.theme) as ITheme;
+      } catch {
+        console.warn(`Unknown theme "${element.dataset.theme}", using default`);
+      }
+    }
+  }
 
   return config;
 }
@@ -95,7 +297,7 @@ class WebTerminal {
       scrollback: config.scrollback ?? 1000,
       cursorBlink: true,
       cursorStyle: "block",
-      theme: config.theme,
+      theme: config.theme ?? THEMES.dark,
       wasmPath,
     };
 
@@ -318,4 +520,4 @@ if (document.readyState === "loading") {
 }
 
 // Export for potential external use
-export { WebTerminal, initTerminals, instances };
+export { WebTerminal, initTerminals, instances, THEMES };