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// Copyright 2011 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package main
import (
"go/ast"
)
func init() {
register(imagenewFix)
}
var imagenewFix = fix{
"imagenew",
"2011-09-14",
imagenew,
`Adapt image.NewXxx calls to pass an image.Rectangle instead of (w, h int).
http://codereview.appspot.com/4964073
`,
}
var imagenewFuncs = map[string]bool{
"NewRGBA": true,
"NewRGBA64": true,
"NewNRGBA": true,
"NewNRGBA64": true,
"NewAlpha": true,
"NewAlpha16": true,
"NewGray": true,
"NewGray16": true,
}
func imagenew(f *ast.File) bool {
if !imports(f, "image") {
return false
}
fixed := false
walk(f, func(n interface{}) {
call, ok := n.(*ast.CallExpr)
if !ok {
return
}
isNewFunc := false
for newFunc := range imagenewFuncs {
if len(call.Args) == 2 && isPkgDot(call.Fun, "image", newFunc) {
isNewFunc = true
break
}
}
if len(call.Args) == 3 && isPkgDot(call.Fun, "image", "NewPaletted") {
isNewFunc = true
}
if !isNewFunc {
return
}
// Replace image.NewXxx(w, h) with image.NewXxx(image.Rect(0, 0, w, h)).
rectArgs := []ast.Expr{
&ast.BasicLit{Value: "0"},
&ast.BasicLit{Value: "0"},
}
rectArgs = append(rectArgs, call.Args[:2]...)
rect := []ast.Expr{
&ast.CallExpr{
Fun: &ast.SelectorExpr{
X: &ast.Ident{
Name: "image",
},
Sel: &ast.Ident{
Name: "Rect",
},
},
Args: rectArgs,
},
}
call.Args = append(rect, call.Args[2:]...)
fixed = true
})
return fixed
}
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