wide/file/outline.go

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// Copyright (c) 2015, B3log
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//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package file
import (
"encoding/json"
"go/ast"
"go/parser"
"go/token"
"net/http"
"github.com/b3log/wide/util"
)
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type element struct {
Name string
Pos token.Pos
End token.Pos
}
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// GetOutline gets outfile of a go file.
func GetOutline(w http.ResponseWriter, r *http.Request) {
data := map[string]interface{}{"succ": true}
defer util.RetJSON(w, r, data)
var args map[string]interface{}
if err := json.NewDecoder(r.Body).Decode(&args); err != nil {
logger.Error(err)
data["succ"] = false
return
}
code := args["code"].(string)
fset := token.NewFileSet()
f, err := parser.ParseFile(fset, "", code, 0)
if err != nil {
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data["succ"] = false
return
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}
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//ast.Print(fset, f)
data["package"] = &element{Name: f.Name.Name, Pos: f.Name.Pos(), End: f.Name.End()}
imports := []*element{}
for _, astImport := range f.Imports {
impt := &element{Name: astImport.Path.Value, Pos: astImport.Path.Pos(), End: astImport.Path.End()}
imports = append(imports, impt)
}
data["imports"] = imports
funcDecls := []*element{}
varDecls := []*element{}
constDecls := []*element{}
structDecls := []*element{}
interfaceDecls := []*element{}
for _, decl := range f.Decls {
switch decl.(type) {
case *ast.FuncDecl:
funcDecl := decl.(*ast.FuncDecl)
decl := &element{Name: funcDecl.Name.Name, Pos: funcDecl.Name.Pos(), End: funcDecl.Name.End()}
funcDecls = append(funcDecls, decl)
case *ast.GenDecl:
genDecl := decl.(*ast.GenDecl)
for _, spec := range genDecl.Specs {
switch genDecl.Tok {
case token.VAR:
variableSpec := spec.(*ast.ValueSpec)
decl := &element{Name: variableSpec.Names[0].Name, Pos: variableSpec.Pos(), End: variableSpec.End()}
varDecls = append(varDecls, decl)
case token.TYPE:
typeSpec := spec.(*ast.TypeSpec)
decl := &element{Name: typeSpec.Name.Name, Pos: typeSpec.Name.Pos(), End: typeSpec.Name.End()}
switch typeSpec.Type.(type) {
case *ast.StructType:
structDecls = append(structDecls, decl)
case *ast.InterfaceType:
interfaceDecls = append(interfaceDecls, decl)
}
case token.CONST:
constSpec := spec.(*ast.ValueSpec)
decl := &element{Name: constSpec.Names[0].Name, Pos: constSpec.Pos(), End: constSpec.End()}
constDecls = append(constDecls, decl)
}
}
}
}
data["funcDecls"] = funcDecls
data["varDecls"] = varDecls
data["constDecls"] = constDecls
data["structDecls"] = structDecls
data["interfaceDecls"] = interfaceDecls
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}