1 files changed, 78 insertions, 0 deletions
diff --git a/examples/prompts/swap-light-and-dark-colors.py b/examples/prompts/swap-light-and-dark-colors.py
new file mode 100755
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--- /dev/null
+++ b/examples/prompts/swap-light-and-dark-colors.py
@@ -0,0 +1,78 @@
+#!/usr/bin/env python
+"""
+Demonstration of swapping light/dark colors in prompt_toolkit using the
+`swap_light_and_dark_colors` parameter.
+
+Notice that this doesn't swap foreground and background like "reverse" does. It
+turns light green into dark green and the other way around. Foreground and
+background are independent of each other.
+"""
+from pygments.lexers.html import HtmlLexer
+
+from prompt_toolkit import prompt
+from prompt_toolkit.completion import WordCompleter
+from prompt_toolkit.filters import Condition
+from prompt_toolkit.formatted_text import HTML
+from prompt_toolkit.key_binding import KeyBindings
+from prompt_toolkit.lexers import PygmentsLexer
+
+html_completer = WordCompleter(
+    [
+        "<body>",
+        "<div>",
+        "<head>",
+        "<html>",
+        "<img>",
+        "<li>",
+        "<link>",
+        "<ol>",
+        "<p>",
+        "<span>",
+        "<table>",
+        "<td>",
+        "<th>",
+        "<tr>",
+        "<ul>",
+    ],
+    ignore_case=True,
+)
+
+
+def main():
+    swapped = [False]  # Nonlocal
+    bindings = KeyBindings()
+
+    @bindings.add("c-t")
+    def _(event):
+        "When ControlT has been pressed, toggle light/dark colors."
+        swapped[0] = not swapped[0]
+
+    def bottom_toolbar():
+        if swapped[0]:
+            on = "on=true"
+        else:
+            on = "on=false"
+
+        return (
+            HTML(
+                'Press <style bg="#222222" fg="#ff8888">[control-t]</style> '
+                "to swap between dark/light colors. "
+                '<style bg="ansiblack" fg="ansiwhite">[%s]</style>'
+            )
+            % on
+        )
+
+    text = prompt(
+        HTML('<style fg="#aaaaaa">Give some animals</style>: '),
+        completer=html_completer,
+        complete_while_typing=True,
+        bottom_toolbar=bottom_toolbar,
+        key_bindings=bindings,
+        lexer=PygmentsLexer(HtmlLexer),
+        swap_light_and_dark_colors=Condition(lambda: swapped[0]),
+    )
+    print("You said: %s" % text)
+
+
+if __name__ == "__main__":
+    main()