Refactor crates.

src/ide/gui/filesystem.rs

@@ -0,0 +1,146 @@
+// SPDX-FileCopyrightText: 2026, Shaun Reed <shaunrd0@gmail.com>
+//
+// SPDX-License-Identifier: GNU General Public License v3.0 or later
+
+use cxx_qt_lib::{QModelIndex, QString};
+use dirs;
+use std::fs;
+use std::path::Path;
+use syntect::easy::HighlightLines;
+use syntect::highlighting::ThemeSet;
+use syntect::html::{IncludeBackground, append_highlighted_html_for_styled_line};
+use syntect::parsing::SyntaxSet;
+use syntect::util::LinesWithEndings;
+
+#[cxx_qt::bridge]
+pub mod qobject {
+    unsafe extern "C++" {
+        // Import Qt Types from C++
+        include!("cxx-qt-lib/qstring.h");
+        type QString = cxx_qt_lib::QString;
+        include!("cxx-qt-lib/qmodelindex.h");
+        type QModelIndex = cxx_qt_lib::QModelIndex;
+        include!(<QtGui/QFileSystemModel>);
+        type QFileSystemModel;
+    }
+
+    unsafe extern "RustQt" {
+        // Export QML Types from Rust
+        #[qobject]
+        #[base = QFileSystemModel]
+        #[qml_element]
+        #[qml_singleton]
+        #[qproperty(QString, file_path, cxx_name = "filePath")]
+        type FileSystem = super::FileSystemImpl;
+
+        #[inherit]
+        #[cxx_name = "setRootPath"]
+        fn set_root_path(self: Pin<&mut FileSystem>, path: &QString) -> QModelIndex;
+
+        #[qinvokable]
+        #[cxx_override]
+        #[cxx_name = "columnCount"]
+        fn column_count(self: &FileSystem, _index: &QModelIndex) -> i32;
+
+        #[qinvokable]
+        #[cxx_name = "readFile"]
+        fn read_file(self: &FileSystem, path: &QString) -> QString;
+
+        #[qinvokable]
+        #[cxx_name = "setDirectory"]
+        fn set_directory(self: Pin<&mut FileSystem>, path: &QString) -> QModelIndex;
+
+        #[qinvokable]
+        fn icon(self: Pin<&mut FileSystem>, path: &QString) -> QString;
+    }
+}
+
+pub struct FileSystemImpl {
+    file_path: QString,
+}
+
+// Default is explicit to make the editor open this source file initially.
+impl Default for FileSystemImpl {
+    fn default() -> Self {
+        Self {
+            file_path: QString::from(file!()),
+        }
+    }
+}
+
+impl qobject::FileSystem {
+    fn read_file(&self, path: &QString) -> QString {
+        if path.is_empty() {
+            return QString::default();
+        }
+        let meta = fs::metadata(path.to_string())
+            .unwrap_or_else(|_| panic!("Failed to get file metadata {path:?}"));
+        if !meta.is_file() {
+            crate::warn!(target:"FileSystem", "Attempted to open file {path:?} that is not a valid file");
+            return QString::default();
+        }
+        let path_str = path.to_string();
+        if let Ok(lines) = fs::read_to_string(path_str.as_str()) {
+            let ss = SyntaxSet::load_defaults_nonewlines();
+            let ts = ThemeSet::load_defaults();
+            let theme = &ts.themes["base16-ocean.dark"];
+            let lang = ss
+                .find_syntax_by_extension(
+                    Path::new(path_str.as_str())
+                        .extension()
+                        .map(|s| s.to_str())
+                        .unwrap_or_else(|| Some("md"))
+                        .expect("Failed to get file extension"),
+                )
+                .unwrap_or_else(|| ss.find_syntax_plain_text());
+            let mut highlighter = HighlightLines::new(lang, theme);
+            // If you care about the background, see `start_highlighted_html_snippet(theme);`.
+            let mut output = String::from("<pre>\n");
+            for line in LinesWithEndings::from(lines.as_str()) {
+                let regions = highlighter
+                    .highlight_line(line, &ss)
+                    .expect("Failed to highlight");
+
+                append_highlighted_html_for_styled_line(
+                    &regions[..],
+                    IncludeBackground::No,
+                    &mut output,
+                )
+                .expect("Failed to insert highlighted html");
+            }
+
+            output.push_str("</pre>\n");
+            QString::from(output)
+        } else {
+            QString::default()
+        }
+    }
+
+    // There will never be more than one column.
+    fn column_count(&self, _index: &QModelIndex) -> i32 {
+        1
+    }
+
+    fn set_directory(self: std::pin::Pin<&mut Self>, path: &QString) -> QModelIndex {
+        if !path.is_empty()
+            && fs::metadata(path.to_string())
+                .unwrap_or_else(|_| panic!("Failed to get metadata for path {path:?}"))
+                .is_dir()
+        {
+            self.set_root_path(path)
+        } else {
+            // If the initial directory can't be opened, attempt to find the home directory.
+            let homedir = dirs::home_dir()
+                .expect("Failed to get home directory")
+                .as_path()
+                .to_str()
+                .unwrap()
+                .to_string();
+            self.set_root_path(&QString::from(homedir))
+        }
+    }
+
+    fn icon(self: std::pin::Pin<&mut Self>, path: &QString) -> QString {
+        QString::from(crate::fs::icon(path.to_string().as_str()).to_string())
+    }
+}