1 files changed, 59 insertions, 0 deletions

diff --git a/crates/ide_db/src/source_change.rs b/crates/ide_db/src/source_change.rs
new file mode 100644
index 000000000..f1590ec66
--- /dev/null
+++ b/crates/ide_db/src/source_change.rs
@@ -0,0 +1,59 @@
+//! This modules defines type to represent changes to the source code, that flow
+//! from the server to the client.
+//!
+//! It can be viewed as a dual for `AnalysisChange`.
+
+use base_db::FileId;
+use text_edit::TextEdit;
+
+#[derive(Default, Debug, Clone)]
+pub struct SourceChange {
+    pub source_file_edits: Vec<SourceFileEdit>,
+    pub file_system_edits: Vec<FileSystemEdit>,
+    pub is_snippet: bool,
+}
+
+impl SourceChange {
+    /// Creates a new SourceChange with the given label
+    /// from the edits.
+    pub fn from_edits(
+        source_file_edits: Vec<SourceFileEdit>,
+        file_system_edits: Vec<FileSystemEdit>,
+    ) -> Self {
+        SourceChange { source_file_edits, file_system_edits, is_snippet: false }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub struct SourceFileEdit {
+    pub file_id: FileId,
+    pub edit: TextEdit,
+}
+
+impl From<SourceFileEdit> for SourceChange {
+    fn from(edit: SourceFileEdit) -> SourceChange {
+        vec![edit].into()
+    }
+}
+
+impl From<Vec<SourceFileEdit>> for SourceChange {
+    fn from(source_file_edits: Vec<SourceFileEdit>) -> SourceChange {
+        SourceChange { source_file_edits, file_system_edits: Vec::new(), is_snippet: false }
+    }
+}
+
+#[derive(Debug, Clone)]
+pub enum FileSystemEdit {
+    CreateFile { anchor: FileId, dst: String },
+    MoveFile { src: FileId, anchor: FileId, dst: String },
+}
+
+impl From<FileSystemEdit> for SourceChange {
+    fn from(edit: FileSystemEdit) -> SourceChange {
+        SourceChange {
+            source_file_edits: Vec::new(),
+            file_system_edits: vec![edit],
+            is_snippet: false,
+        }
+    }
+}