add input context menu helper

We are going to want this in more places

Signed-off-by: William Casarin <jb55@jb55.com>

crates/notedeck_ui/src/context_menu.rs

@@ -0,0 +1,49 @@
+/// Context menu helpers (paste, etc)
+use egui_winit::clipboard::Clipboard;
+
+#[derive(Copy, Clone, Eq, PartialEq)]
+pub enum PasteBehavior {
+    Clear,
+    Append,
+}
+
+fn handle_paste(clipboard: &mut Clipboard, input: &mut String, paste_behavior: PasteBehavior) {
+    if let Some(text) = clipboard.get() {
+        // if called with clearing_input_context, then we clear before
+        // we paste. Useful for certain fields like passwords, etc
+        match paste_behavior {
+            PasteBehavior::Clear => input.clear(),
+            PasteBehavior::Append => {}
+        }
+        input.push_str(&text);
+    }
+}
+
+pub fn input_context(
+    response: &egui::Response,
+    clipboard: &mut Clipboard,
+    input: &mut String,
+    paste_behavior: PasteBehavior,
+) {
+    response.context_menu(|ui| {
+        if ui.button("Paste").clicked() {
+            handle_paste(clipboard, input, paste_behavior);
+            ui.close_menu();
+        }
+
+        if ui.button("Copy").clicked() {
+            clipboard.set_text(input.to_owned());
+            ui.close_menu();
+        }
+
+        if ui.button("Cut").clicked() {
+            clipboard.set_text(input.to_owned());
+            input.clear();
+            ui.close_menu();
+        }
+    });
+
+    if response.middle_clicked() {
+        handle_paste(clipboard, input, paste_behavior)
+    }
+}

crates/notedeck_ui/src/lib.rs

@@ -3,6 +3,7 @@ pub mod blur;
 pub mod colors;
 pub mod constants;
 pub mod contacts;
+pub mod context_menu;
 pub mod gif;
 pub mod icons;
 pub mod images;