Ely Office: six offline-first desktop apps in Rust and GPUI

ElyDoc, ElyTable, ElyShow (LibreOfficeKit), ElyPDF (MuPDF), ElyTree (Git),
ElyMark (Milkdown and CodeMirror in CEF). ElyMail and ElyAgent follow.

apps/ely-doc/src/files.rs

@@ -0,0 +1,99 @@
+//! The bundled templates (DOC-01).
+
+use gpui::App;
+
+/// The three bundled templates (DOC-01).
+#[derive(Clone, Copy, Debug, PartialEq)]
+pub enum Template {
+    Blank,
+    Report,
+    Letter,
+}
+
+pub const TEMPLATES: [Template; 3] = [Template::Blank, Template::Report, Template::Letter];
+
+impl Template {
+    pub fn key(self) -> &'static str {
+        match self {
+            Template::Blank => "blank",
+            Template::Report => "report",
+            Template::Letter => "letter",
+        }
+    }
+
+    /// The paragraphs, as (heading level, text); 0 is body.
+    fn lines(self, cx: &App) -> Vec<(u8, String)> {
+        let text = |key: &str| ely_ui::i18n::text(cx, key, &[]).to_string();
+        match self {
+            Template::Blank => vec![(0, String::new())],
+            Template::Report => vec![
+                (9, text("doc.report.title")),
+                (1, text("doc.report.summary")),
+                (0, text("doc.body")),
+                (1, text("doc.report.details")),
+                (0, text("doc.body")),
+            ],
+            Template::Letter => vec![
+                (0, text("doc.letter.sender")),
+                (0, text("doc.letter.date")),
+                (0, String::new()),
+                (0, text("doc.letter.recipient")),
+                (0, String::new()),
+                (0, text("doc.letter.greeting")),
+                (0, text("doc.body")),
+                (0, String::new()),
+                (0, text("doc.letter.closing")),
+                (0, text("doc.letter.sender")),
+            ],
+        }
+    }
+
+    /// Flat ODF text; level 9 is the Title style.
+    pub fn fodt(self, cx: &App) -> String {
+        let body: String = self
+            .lines(cx)
+            .into_iter()
+            .map(|(level, text)| {
+                let text = escape(&text);
+                match level {
+                    0 => format!("<text:p>{text}</text:p>"),
+                    9 => format!("<text:p text:style-name=\"Title\">{text}</text:p>"),
+                    level => format!("<text:h text:outline-level=\"{level}\">{text}</text:h>"),
+                }
+            })
+            .collect();
+        format!(
+            "<?xml version=\"1.0\" encoding=\"UTF-8\"?>\n<office:document xmlns:office=\"urn:oasis:names:tc:opendocument:xmlns:office:1.0\" xmlns:text=\"urn:oasis:names:tc:opendocument:xmlns:text:1.0\" office:version=\"1.3\" office:mimetype=\"application/vnd.oasis.opendocument.text\"><office:body><office:text>{body}</office:text></office:body></office:document>\n"
+        )
+    }
+
+    /// The template as the picker's markdown preview.
+    pub fn preview(self, cx: &App) -> String {
+        self.lines(cx)
+            .into_iter()
+            .map(|(level, text)| match level {
+                0 => text,
+                9 => format!("# {text}"),
+                level => format!("{} {text}", "#".repeat(usize::from(level) + 1)),
+            })
+            .collect::<Vec<_>>()
+            .join("\n\n")
+    }
+}
+
+/// XML-escapes template text.
+fn escape(text: &str) -> String {
+    text.replace('&', "&amp;")
+        .replace('<', "&lt;")
+        .replace('>', "&gt;")
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn template_text_is_escaped() {
+        assert_eq!(escape("a<b & c>"), "a&lt;b &amp; c&gt;");
+    }
+}