// UpdateGoPackage updates Go packages specified by importPathPattern.
func UpdateGoPackage(importPathPattern string) {
var goPackage = document.GetElementByID(importPathPattern)
var goPackageButton = goPackage.GetElementsByClassName("update-button")[0].(*dom.HTMLAnchorElement)
goPackageButton.SetTextContent("Updating...")
goPackageButton.AddEventListener("click", false, func(event dom.Event) { event.PreventDefault() })
goPackageButton.SetTabIndex(-1)
goPackageButton.Class().Add("disabled")
go func() {
req := xhr.NewRequest("POST", "/-/update")
req.SetRequestHeader("Content-Type", "application/x-www-form-urlencoded")
err := req.Send(url.Values{"import_path_pattern": {importPathPattern}}.Encode())
if err != nil {
println(err.Error())
return
}
// Hide the "Updating..." label.
goPackageButton.Style().SetProperty("display", "none", "")
// Show "No Updates Available" if there are no remaining updates.
if !hasUpdatesAvailable() {
document.GetElementByID("no_updates").(dom.HTMLElement).Style().SetProperty("display", "none", "")
}
// Move this Go package to "Installed Updates" list.
installedUpdates := document.GetElementByID("installed_updates").(dom.HTMLElement)
installedUpdates.Style().SetProperty("display", "", "")
installedUpdates.ParentNode().InsertBefore(goPackage, installedUpdates.NextSibling()) // Insert after.
}()
}
func loadJSON(r Resource) (string, error) {
req := xhr.NewRequest("GET", r.url)
err := req.Send("")
if err != nil {
return "", err
}
return req.Response.String(), nil
// ch := make(chan error, 1)
// req := js.Global.Get("XMLHttpRequest").New()
// req.Call("open", "GET", r.url, true)
// req.Call("addEventListener", "load", func(*js.Object) {
// go func() { ch <- nil }()
// }, false)
// req.Call("addEventListener", "error", func(o *js.Object) {
// go func() { ch <- &js.Error{Object: o} }()
// }, false)
// req.Call("send", nil)
// err := <-ch
// if err != nil {
// return "", err
// }
// return req.Get("responseText").Str(), nil
}
func main() {
req := xhr.NewRequest("GET", "/")
err := req.Send(nil)
if err != nil {
println(err)
}
headers := req.ResponseHeaders()
println(headers)
}
func loadFont(r Resource) (*truetype.Font, error) {
req := xhr.NewRequest("GET", r.url+"_js")
err := req.Send("")
if err != nil {
return &truetype.Font{}, err
}
fontDataEncoded := bytes.NewBuffer([]byte(req.Response.String()))
fontDataCompressed := base64.NewDecoder(base64.StdEncoding, fontDataEncoded)
fontDataTtf, err := gzip.NewReader(fontDataCompressed)
if err != nil {
return nil, err
}
var ttfBytes []byte
ttfBytes, err = ioutil.ReadAll(fontDataTtf)
if err != nil {
return nil, err
}
return freetype.ParseFont(ttfBytes)
}
func (u *uploader) upload() {
fd := dom.NewFormData()
// println("fd.set", fd.Set)
files := u.target.Files()
for _, file := range files {
fd.Append(file.Name, file)
}
req := xhr.NewRequest("POST", u.url.Get().String())
println("xhr url:", u.url.Get().String())
err := req.Send(fd)
// when network error or response error
if err != nil || req.Status != 200 {
if errCallback != nil {
errCallback(u.url.Get().String(), files, req.Status)
}
return
}
// upload ok
if callback != nil {
callback(u.url.Get().String(), files)
}
}
// UpdateRepository updates specified repository.
// repoRoot is the import path corresponding to the root of the repository.
func UpdateRepository(event dom.Event, repoRoot string) {
event.PreventDefault()
if event.(*dom.MouseEvent).Button != 0 {
return
}
repoUpdate := document.GetElementByID(repoRoot)
updateButton := repoUpdate.GetElementsByClassName("update-button")[0].(*dom.HTMLAnchorElement)
updateButton.SetTextContent("Updating...")
updateButton.AddEventListener("click", false, func(event dom.Event) { event.PreventDefault() })
updateButton.SetTabIndex(-1)
updateButton.Class().Add("disabled")
go func() {
req := xhr.NewRequest("POST", "/-/update")
req.SetRequestHeader("Content-Type", "application/x-www-form-urlencoded")
err := req.Send(url.Values{"repo_root": {repoRoot}}.Encode())
if err != nil {
println(err.Error())
return
}
// Hide the "Updating..." label.
updateButton.Style().SetProperty("display", "none", "")
// Show "No Updates Available" if there are no remaining updates.
if !anyUpdatesRemaining() {
document.GetElementByID("no_updates").(dom.HTMLElement).Style().SetProperty("display", "", "")
}
// Move this Go package to "Installed Updates" list.
installedUpdates := document.GetElementByID("installed_updates").(dom.HTMLElement)
installedUpdates.Style().SetProperty("display", "", "")
installedUpdates.ParentNode().InsertBefore(repoUpdate, installedUpdates.NextSibling()) // Insert after.
}()
}
/**
* @param {string} searchTerm - Search term for Google Image search.
* @param {func(string,int,int)} callback - Called when an image has
* been found. The callback gets the URL, width and height of the image.
* @param {func(string)} errorCallback - Called when the image is not found.
* The callback gets a string that describes the failure reason.
*/
func getImageUrl(searchTerm string, callback func(imageUrl, width, height string), errorCallback func(errorMessage string)) {
// Google image search - 100 searches per day.
// https://developers.google.com/image-search/
searchUrl := "https://ajax.googleapis.com/ajax/services/search/images" + "?v=1.0&q=" + url.QueryEscape(searchTerm)
req := xhr.NewRequest("GET", searchUrl)
req.Timeout = 2000 // two second, in milliseconds
req.ResponseType = "text"
err := req.Send(nil)
if err != nil {
errorCallback("Something went wrong with GET request to " + searchUrl + "." + err.Error())
return
}
returnFormat := struct {
ResponseData struct {
Results []struct {
Url string `json:"Url"`
TbWidth string `json:"tbWidth"`
TbHeight string `json:"tbHeight"`
} `json:"results"`
} `json:"responseData"`
}{}
err = json.Unmarshal([]byte(req.Response.String()), &returnFormat)
if err != nil {
errorCallback("Failed to unmarshal response into object, with Error: " + err.Error() + ". Response was: " + req.Response.String())
return
}
fmt.Println("Got from API: ", returnFormat)
firstResult := returnFormat.ResponseData.Results[0]
imageUrl := firstResult.Url
width := firstResult.TbWidth
height := firstResult.TbHeight
callback(imageUrl, width, height)
}
func main() {
var location = dom.GetWindow().Top().Location() // We might be inside an iframe, but want to use the location of topmost window.
codeReady := make(chan struct{}) // Used to synchronize when "code" value is ready.
app := angularjs.NewModule("playground", nil, nil)
app.NewController("PlaygroundCtrl", func(scope *angularjs.Scope) {
if strings.HasPrefix(location.Hash, "#/") {
id := location.Hash[2:]
req := xhr.NewRequest("GET", "http://"+snippetStoreHost+"/p/"+id)
req.ResponseType = xhr.ArrayBuffer
go func() {
err := req.Send(nil)
if err != nil || req.Status != 200 {
scope.Apply(func() {
scope.Set("output", []Line{Line{"type": "err", "content": `failed to load snippet "` + id + `"`}})
})
return
}
data := js.Global.Get("Uint8Array").New(req.Response).Interface().([]byte)
scope.Apply(func() {
scope.Set("code", string(data))
close(codeReady)
})
}()
} else {
scope.Set("code", "package main\n\nimport (\n\t\"fmt\"\n\t\"github.com/gopherjs/gopherjs/js\"\n)\n\nfunc main() {\n\tfmt.Println(\"Hello, playground\")\n\tjs.Global.Call(\"alert\", \"Hello, JavaScript\")\n\tprintln(\"Hello, JS console\")\n}\n")
close(codeReady)
}
scope.Set("shareUrl", "")
scope.Set("showShareUrl", false)
packages := make(map[string]*compiler.Archive)
var pkgsToLoad map[string]struct{}
importContext := compiler.NewImportContext(func(path string) (*compiler.Archive, error) {
if pkg, found := packages[path]; found {
return pkg, nil
}
pkgsToLoad[path] = struct{}{}
return &compiler.Archive{}, nil
})
fileSet := token.NewFileSet()
pkgsReceived := 0
setupEnvironment(scope)
codeArea := angularjs.ElementById("code")
codeArea.On("input", func(e *angularjs.Event) {
scope.Set("showShareUrl", false)
location.Hash = ""
})
codeArea.On("keydown", func(e *angularjs.Event) {
toInsert := ""
switch e.KeyCode {
case '\t':
toInsert = "\t"
case '\r':
toInsert = "\n"
start := codeArea.Prop("selectionStart").Int()
code := scope.Get("code").String()
i := strings.LastIndex(code[:start], "\n") + 1
for i < start {
c := code[i]
if c != ' ' && c != '\t' {
break
}
toInsert += string(c)
i++
}
}
if toInsert != "" {
scope.Set("showShareUrl", false)
location.Hash = ""
start := codeArea.Prop("selectionStart").Int()
end := codeArea.Prop("selectionEnd").Int()
code := scope.Get("code").String()
scope.Apply(func() {
scope.Set("code", code[:start]+toInsert+code[end:])
})
codeArea.SetProp("selectionStart", start+len(toInsert))
codeArea.SetProp("selectionEnd", start+len(toInsert))
e.PreventDefault()
}
})
var run func(bool)
run = func(loadOnly bool) {
output = nil
scope.Set("output", output)
pkgsToLoad = make(map[string]struct{})
file, err := parser.ParseFile(fileSet, "prog.go", []byte(scope.Get("code").String()), parser.ParseComments)
if err != nil {
if list, ok := err.(scanner.ErrorList); ok {
for _, entry := range list {
output = append(output, Line{"type": "err", "content": entry.Error()})
}
scope.Set("output", output)
return
}
scope.Set("output", []Line{Line{"type": "err", "content": err.Error()}})
return
}
mainPkg, err := compiler.Compile("main", []*ast.File{file}, fileSet, importContext, false)
packages["main"] = mainPkg
if err != nil && len(pkgsToLoad) == 0 {
if list, ok := err.(compiler.ErrorList); ok {
var output []Line
for _, entry := range list {
output = append(output, Line{"type": "err", "content": entry.Error()})
}
scope.Set("output", output)
return
}
scope.Set("output", []Line{Line{"type": "err", "content": err.Error()}})
return
}
var allPkgs []*compiler.Archive
if len(pkgsToLoad) == 0 {
allPkgs, _ = compiler.ImportDependencies(mainPkg, importContext.Import)
}
if len(pkgsToLoad) != 0 {
pkgsReceived = 0
for path := range pkgsToLoad {
req := xhr.NewRequest("GET", "pkg/"+path+".a.js")
req.ResponseType = xhr.ArrayBuffer
go func(path string) {
err := req.Send(nil)
if err != nil || req.Status != 200 {
scope.Apply(func() {
scope.Set("output", []Line{Line{"type": "err", "content": `failed to load package "` + path + `"`}})
})
return
}
data := js.Global.Get("Uint8Array").New(req.Response).Interface().([]byte)
packages[path], err = compiler.ReadArchive(path+".a", path, bytes.NewReader(data), importContext.Packages)
if err != nil {
scope.Apply(func() {
scope.Set("output", []Line{Line{"type": "err", "content": err.Error()}})
})
return
}
pkgsReceived++
if pkgsReceived == len(pkgsToLoad) {
run(loadOnly)
}
}(path)
}
return
}
if loadOnly {
return
}
jsCode := bytes.NewBuffer(nil)
jsCode.WriteString("try{\n")
compiler.WriteProgramCode(allPkgs, &compiler.SourceMapFilter{Writer: jsCode})
jsCode.WriteString("} catch (err) {\ngoPanicHandler(err.message);\n}\n")
js.Global.Set("$checkForDeadlock", true)
js.Global.Call("eval", js.InternalObject(jsCode.String()))
}
scope.Set("run", run)
go func() {
<-codeReady // Wait for "code" value to be ready.
run(true)
}()
scope.Set("format", func() {
out, err := format.Source([]byte(scope.Get("code").String()))
if err != nil {
scope.Set("output", []Line{Line{"type": "err", "content": err.Error()}})
return
}
scope.Set("code", string(out))
scope.Set("output", []Line{})
})
scope.Set("share", func() {
req := xhr.NewRequest("POST", "http://"+snippetStoreHost+"/share")
req.ResponseType = xhr.ArrayBuffer
go func() {
err := req.Send([]byte(scope.Get("code").String())) // Send as binary.
if err != nil || req.Status != 200 {
scope.Apply(func() {
scope.Set("output", []Line{Line{"type": "err", "content": `failed to share snippet`}})
})
return
}
data := js.Global.Get("Uint8Array").New(req.Response).Interface().([]byte)
scope.Apply(func() {
id := string(data)
location.Hash = "#/" + id
scope.Set("shareUrl", location.String())
scope.Set("showShareUrl", true)
// TODO: Do this better using AngularJS.
// Perhaps using http://stackoverflow.com/questions/14833326/how-to-set-focus-on-input-field/18295416.
go func() {
time.Sleep(time.Millisecond)
dom.GetWindow().Document().GetElementByID("share-url").(*dom.HTMLInputElement).Select()
}()
})
}()
})
// Start watching for hashchange events, and reload snippet if it happens.
dom.GetWindow().Top().AddEventListener("hashchange", false, func(event dom.Event) {
event.PreventDefault()
if strings.HasPrefix(location.Hash, "#/") {
id := location.Hash[2:]
req := xhr.NewRequest("GET", "http://"+snippetStoreHost+"/p/"+id)
req.ResponseType = xhr.ArrayBuffer
go func() {
err := req.Send(nil)
if err != nil || req.Status != 200 {
scope.Apply(func() {
scope.Set("output", []Line{Line{"type": "err", "content": `failed to load snippet "` + id + `"`}})
})
return
}
data := js.Global.Get("Uint8Array").New(req.Response).Interface().([]byte)
scope.Apply(func() {
scope.Set("code", string(data))
})
}()
}
})
})
}