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#+private file
package server
import "core:fmt"
import "core:odin/ast"
import "core:strings"
import "src:common"
// Get the offset of the start of the line containing the given offset
get_line_start_offset :: proc(src: string, offset: int) -> int {
line_start := offset
for line_start > 0 && src[line_start - 1] != '\n' {
line_start -= 1
}
return line_start
}
get_block_original_text :: proc(block: []^ast.Stmt, document_text: string) -> string {
if len(block) == 0 {
return ""
}
start := get_line_start_offset(document_text, block[0].pos.offset)
end := block[max(0, len(block) - 1)].end.offset
return string(document_text[start:end])
}
SwitchCaseInfo :: struct {
name: string,
body_indentation: string,
body: string,
}
get_switch_cases_info :: proc(
document: ^Document,
ast_context: ^AstContext,
position_context: ^DocumentPositionContext,
) -> (
existing_cases: []SwitchCaseInfo,
all_case_names: []string,
switch_indentation: string,
is_enum: bool,
ok: bool,
) {
if (position_context.switch_stmt == nil && position_context.switch_type_stmt == nil) ||
(position_context.switch_stmt != nil && position_context.switch_stmt.cond == nil) {
return nil, nil, "", false, false
}
switch_block: ^ast.Block_Stmt
found_switch_block: bool
if position_context.switch_stmt != nil {
switch_block, found_switch_block = position_context.switch_stmt.body.derived.(^ast.Block_Stmt)
is_enum = true
}
if !found_switch_block && position_context.switch_type_stmt != nil {
switch_block, found_switch_block = position_context.switch_type_stmt.body.derived.(^ast.Block_Stmt)
}
if !found_switch_block {
return nil, nil, "", false, false
}
switch_indentation = get_line_indentation(string(document.text), switch_block.pos.offset)
existing_cases_in_order := make([dynamic]SwitchCaseInfo, context.temp_allocator)
for stmt in switch_block.stmts {
if case_clause, ok := stmt.derived.(^ast.Case_Clause); ok {
case_name := ""
for clause in case_clause.list {
if is_enum {
if name, ok := get_used_switch_name(clause); ok {
case_name = name
break
}
} else {
reset_ast_context(ast_context)
if symbol, ok := resolve_type_expression(ast_context, clause); ok {
case_name = get_qualified_union_case_name(&symbol, ast_context, position_context)
//TODO: this is wrong for anonymous enums and structs, where the name field is "enum" or "struct" respectively but we want to use the full signature
//we also can't use the signature all the time because type aliases need to use specifically the alias name here and not the signature
if case_name == "" {
case_name = get_signature(ast_context, symbol)
}
break
}
}
}
if case_name != "" {
case_info := SwitchCaseInfo {
name = case_name,
body = get_block_original_text(case_clause.body, string(document.text)),
}
append(&existing_cases_in_order, case_info)
}
}
}
if is_enum {
enum_value, was_super_enum, unwrap_ok := unwrap_enum(ast_context, position_context.switch_stmt.cond)
if !unwrap_ok {
return nil, nil, "", true, false
}
return existing_cases_in_order[:], enum_value.names, switch_indentation, !was_super_enum, true
} else {
st := position_context.switch_type_stmt
if st == nil {
return nil, nil, "", false, false
}
reset_ast_context(ast_context)
union_value, unwrap_ok := unwrap_union(ast_context, st.tag.derived.(^ast.Assign_Stmt).rhs[0])
if !unwrap_ok {
return nil, nil, "", false, false
}
case_names := make([]string, len(union_value.types), context.temp_allocator)
for t, i in union_value.types {
reset_ast_context(ast_context)
if symbol, ok := resolve_type_expression(ast_context, t); ok {
case_name := get_qualified_union_case_name(&symbol, ast_context, position_context)
//TODO: this is wrong for anonymous enums and structs, where the name field is "enum" or "struct" respectively but we want to use the full signature
//we also can't use the signature all the time because type aliases need to use specifically the alias name here and not the signature
if case_name == "" {
case_name = get_signature(ast_context, symbol)
}
case_names[i] = case_name
} else {
case_names[i] = "invalid type expression"
}
}
return existing_cases_in_order[:], case_names, switch_indentation, false, true
}
}
create_populate_switch_cases_edit :: proc(
position_context: ^DocumentPositionContext,
existing_cases: []SwitchCaseInfo,
switch_indentation: string,
all_case_names: []string,
is_enum: bool,
) -> (
TextEdit,
bool,
) {
//we need to be either in a switch stmt or a switch type stmt
if position_context.switch_stmt == nil && position_context.switch_type_stmt == nil {
return {}, false
}
//entirety of the switch block
range: common.Range
if is_enum {
range = common.get_token_range(position_context.switch_stmt.body.stmt_base, position_context.file.src)
} else {
range = common.get_token_range(position_context.switch_type_stmt.body.stmt_base, position_context.file.src)
}
replacement_builder := strings.builder_make()
dot := is_enum ? "." : ""
b := &replacement_builder
fmt.sbprintln(b, "{")
existing_case_names := map[string]struct{}{}
for case_info in existing_cases {
existing_case_names[case_info.name] = {}
fmt.sbprintln(b, switch_indentation, "case ", dot, case_info.name, ":", sep = "")
case_body := case_info.body
if case_body != "" {
fmt.sbprintln(b, case_info.body)
}
}
for name in all_case_names {
if name in existing_case_names {continue} //covered by prev loop
fmt.sbprintln(b, switch_indentation, "case ", dot, name, ":", sep = "")
}
fmt.sbprint(b, switch_indentation, "}", sep = "")
return TextEdit{range = range, newText = strings.to_string(replacement_builder)}, true
}
@(private = "package")
add_populate_switch_cases_action :: proc(
document: ^Document,
ast_context: ^AstContext,
position_context: ^DocumentPositionContext,
uri: string,
actions: ^[dynamic]CodeAction,
) {
existing_cases, all_case_names, switch_indentation, is_enum, ok := get_switch_cases_info(
document,
ast_context,
position_context,
)
if !ok {return}
all_cases_covered := true
{
existing_case_names := map[string]struct{}{}
for case_info in existing_cases {
existing_case_names[case_info.name] = {}
}
for name in all_case_names {
if name not_in existing_case_names {
all_cases_covered = false
}
}
}
if all_cases_covered {return} //action not needed
edit, edit_ok := create_populate_switch_cases_edit(
position_context,
existing_cases,
switch_indentation,
all_case_names,
is_enum,
)
if !edit_ok {return}
textEdits := make([dynamic]TextEdit, context.temp_allocator)
append(&textEdits, edit)
workspaceEdit: WorkspaceEdit
workspaceEdit.changes = make(map[string][]TextEdit, 0, context.temp_allocator)
workspaceEdit.changes[uri] = textEdits[:]
append(
actions,
CodeAction {
kind = "refactor.rewrite",
isPreferred = true,
title = "populate remaining switch cases",
edit = workspaceEdit,
},
)
}
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