documents: dropped files and pasted pictures go to the owner; insert puts text at the caret

Co-Authored-By: Claude Opus 5.5 (1M context) <noreply@anthropic.com>

src/documents/document/tests/attach.rs

@@ -0,0 +1,76 @@
+use std::{cell::RefCell, path::PathBuf, rc::Rc};
+
+use gpui::{
+    ClipboardItem, Entity, ExternalPaths, FileDropEvent, Image, ImageFormat, Modifiers,
+    TestAppContext, VisualTestContext, point, px,
+};
+
+use super::{MarkdownDocument, MarkdownMode, open, opened, press, text};
+use crate::documents::Attachment;
+
+/// Attachments the document hands its owner.
+fn heard(
+    document: &Entity<MarkdownDocument>,
+    cx: &mut VisualTestContext,
+) -> Rc<RefCell<Vec<Attachment>>> {
+    let heard = Rc::new(RefCell::new(Vec::new()));
+    let kept = heard.clone();
+    cx.update(|_, cx| {
+        cx.subscribe(document, move |_, attached: &Attachment, _| {
+            kept.borrow_mut().push(attached.clone())
+        })
+        .detach()
+    });
+    heard
+}
+
+fn picture() -> Image {
+    Image::from_bytes(ImageFormat::Png, vec![1, 2, 3])
+}
+
+#[gpui::test]
+fn dropped_files_go_to_the_owner(cx: &mut TestAppContext) {
+    let (document, cx) = open("a\n", MarkdownMode::Visual, cx);
+    let heard = heard(&document, cx);
+    let at = point(px(100.0), px(100.0));
+    let paths = ExternalPaths(vec![PathBuf::from("shot.png")].into());
+    cx.simulate_event(FileDropEvent::Entered {
+        position: at,
+        paths,
+    });
+    cx.simulate_event(FileDropEvent::Submit { position: at });
+    cx.run_until_parked();
+    assert_eq!(
+        *heard.borrow(),
+        [Attachment::Files(vec![PathBuf::from("shot.png")])]
+    );
+}
+
+#[gpui::test]
+fn a_pasted_picture_goes_to_the_owner_and_text_pastes(cx: &mut TestAppContext) {
+    let (document, cx) = open("a\n", MarkdownMode::Visual, cx);
+    let heard = heard(&document, cx);
+    press(0, Modifiers::none(), cx);
+    cx.write_to_clipboard(ClipboardItem::new_image(&picture()));
+    cx.simulate_keystrokes("secondary-v");
+    assert_eq!(*heard.borrow(), [Attachment::Picture(picture())]);
+    assert_eq!(opened(&document, cx), "a", "the picture typed nothing");
+    cx.write_to_clipboard(ClipboardItem::new_string("b".into()));
+    cx.simulate_keystrokes("secondary-v");
+    assert_eq!(opened(&document, cx), "ab", "text pastes as text");
+}
+
+#[gpui::test]
+fn text_goes_in_at_the_caret_but_not_in_preview(cx: &mut TestAppContext) {
+    let (document, cx) = open("ab\n", MarkdownMode::Source, cx);
+    document.update(cx, |document, cx| {
+        document.set_caret(0, 1, cx);
+        assert!(document.insert("X", cx));
+    });
+    assert_eq!(text(&document, cx), "aXb\n");
+    document.update_in(cx, |document, window, cx| {
+        document.set_mode(MarkdownMode::Preview, window, cx)
+    });
+    assert!(!document.update(cx, |document, cx| document.insert("Y", cx)));
+    assert_eq!(text(&document, cx), "aXb\n");
+}

src/documents/document/tests/mod.rs

@@ -365,6 +365,7 @@ fn a_press_after_a_write_back_waits_for_the_long_read(cx: &mut TestAppContext) {
     assert_eq!(opened(&document, cx), "B", "once read, B opens whole");
 }
 
+mod attach;
 mod history;
 mod links;
 mod place;