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#+private file
package server
import "core:fmt"
import "core:odin/ast"
import "core:odin/tokenizer"
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])
}
SwitchBlockInfo :: struct {
names: []string,
existing_cases: map[string]struct{},
switch_indentation: string,
is_enum: bool,
pos: tokenizer.Pos,
}
get_switch_cases_info :: proc(
ast_context: ^AstContext,
position_context: ^DocumentPositionContext,
) -> (
SwitchBlockInfo,
bool,
) {
if position_context.switch_stmt == nil && position_context.switch_type_stmt == nil {
return {}, false
}
if position_context.switch_stmt != nil && position_context.switch_stmt.cond == nil {
return {}, false
}
switch_block: ^ast.Block_Stmt
found_switch_block: bool
is_enum: bool
pos: tokenizer.Pos
if position_context.switch_stmt != nil {
switch_block, found_switch_block = position_context.switch_stmt.body.derived.(^ast.Block_Stmt)
is_enum = true
pos = position_context.switch_stmt.pos
}
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)
pos = position_context.switch_type_stmt.pos
}
if !found_switch_block {
return {}, false
}
switch_indentation := get_line_indentation(ast_context.file.src, switch_block.pos.offset)
existing_cases := make(map[string]struct{}, context.temp_allocator)
for stmt in switch_block.stmts {
if case_clause, ok := stmt.derived.(^ast.Case_Clause); ok {
for clause in case_clause.list {
if is_enum {
if name, ok := get_used_switch_name(clause); ok && name != "" {
existing_cases[name] = {}
}
} else {
reset_ast_context(ast_context)
if symbol, ok := resolve_type_expression(ast_context, clause); ok {
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 name == "" {
name = get_signature(ast_context, symbol)
}
if name != "" {
existing_cases[name] = {}
}
}
}
}
pos = case_clause.stmt_base.end
}
}
if is_enum {
enum_value, was_super_enum, unwrap_ok := unwrap_enum(ast_context, position_context.switch_stmt.cond)
if !unwrap_ok {
return {}, false
}
return SwitchBlockInfo {
names = enum_value.names,
existing_cases = existing_cases,
switch_indentation = switch_indentation,
is_enum = !was_super_enum,
pos = pos,
},
true
}
st := position_context.switch_type_stmt
if st == nil {
return {}, 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 {}, false
}
all_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)
}
all_case_names[i] = case_name
} else {
all_case_names[i] = "invalid type expression"
}
}
return SwitchBlockInfo {
names = all_case_names,
existing_cases = existing_cases,
switch_indentation = switch_indentation,
is_enum = false,
pos = pos,
},
true
}
create_populate_switch_cases_edit :: proc(
position_context: ^DocumentPositionContext,
info: SwitchBlockInfo,
) -> (
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
}
pos := info.pos
pos.line += 1
pos.column = 1
position := common.token_pos_to_position(pos, position_context.file.src)
range := common.Range {
start = position,
end = position,
}
replacement_builder := strings.builder_make()
dot := info.is_enum ? "." : ""
b := &replacement_builder
for name in info.names {
if name in info.existing_cases {continue}
fmt.sbprintln(b, info.switch_indentation, "case ", dot, name, ":", sep = "")
}
return TextEdit{range = range, newText = strings.to_string(replacement_builder)}, true
}
@(private = "package")
add_populate_switch_cases_action :: proc(
ast_context: ^AstContext,
position_context: ^DocumentPositionContext,
uri: string,
actions: ^[dynamic]CodeAction,
) {
info, ok := get_switch_cases_info(ast_context, position_context)
if !ok {return}
if len(info.existing_cases) == len(info.names) {return} //action not needed
edit, edit_ok := create_populate_switch_cases_edit(position_context, info)
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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