Use indentation settings in dx fmt and vscode extension

Adds the ability to specify an indent string to public autofmt methods - either
a sequence of spaces or a tab character.

Get the indentation style and size from rustfmt for dx fmt, or from the editor
settings for the vscode extension.

Closes #1595

packages/autofmt/src/lib.rs

@@ -16,8 +16,11 @@ mod collect_macros;
 mod component;
 mod element;
 mod expr;
+mod indent;
 mod writer;
 
+pub use indent::{IndentOptions, IndentType};
+
 /// A modification to the original file to be applied by an IDE
 ///
 /// Right now this re-writes entire rsx! blocks at a time, instead of precise line-by-line changes.
@@ -47,7 +50,7 @@ pub struct FormattedBlock {
 /// back to the file precisely.
 ///
 /// Nested blocks of RSX will be handled automatically
-pub fn fmt_file(contents: &str) -> Vec<FormattedBlock> {
+pub fn fmt_file(contents: &str, indent: IndentOptions) -> Vec<FormattedBlock> {
     let mut formatted_blocks = Vec::new();
 
     let parsed = syn::parse_file(contents).unwrap();
@@ -61,6 +64,7 @@ pub fn fmt_file(contents: &str) -> Vec<FormattedBlock> {
     }
 
     let mut writer = Writer::new(contents);
+    writer.out.indent = indent;
 
     // Don't parse nested macros
     let mut end_span = LineColumn { column: 0, line: 0 };
@@ -76,7 +80,10 @@ pub fn fmt_file(contents: &str) -> Vec<FormattedBlock> {
 
         let rsx_start = macro_path.span().start();
 
-        writer.out.indent = leading_whitespaces(writer.src[rsx_start.line - 1]) / 4;
+        writer.out.indent_level = writer
+            .out
+            .indent
+            .count_indents(writer.src[rsx_start.line - 1]);
 
         write_body(&mut writer, &body);
 
@@ -159,12 +166,13 @@ pub fn fmt_block_from_expr(raw: &str, expr: ExprMacro) -> Option<String> {
     buf.consume()
 }
 
-pub fn fmt_block(block: &str, indent_level: usize) -> Option<String> {
+pub fn fmt_block(block: &str, indent_level: usize, indent: IndentOptions) -> Option<String> {
     let body = syn::parse_str::<dioxus_rsx::CallBody>(block).unwrap();
 
     let mut buf = Writer::new(block);
 
-    buf.out.indent = indent_level;
+    buf.out.indent = indent;
+    buf.out.indent_level = indent_level;
 
     write_body(&mut buf, &body);
 
@@ -230,14 +238,3 @@ pub(crate) fn write_ifmt(input: &IfmtInput, writable: &mut impl Write) -> std::f
     let display = DisplayIfmt(input);
     write!(writable, "{}", display)
 }
-
-pub fn leading_whitespaces(input: &str) -> usize {
-    input
-        .chars()
-        .map_while(|c| match c {
-            ' ' => Some(1),
-            '\t' => Some(4),
-            _ => None,
-        })
-        .sum()
-}