Beispiel #1
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Datei: dom.go Projekt: influx6/gu
// TriggerBindEvent connects the giving event with the provided dom target.
func (dm *DOMRenderer) TriggerBindEvent(event *gjs.Object, root *gjs.Object, source *trees.Event) {
	target := event.Get("target")

	children := root.Call("querySelectorAll", source.Target())
	if children == nil || children == gjs.Undefined {
		return
	}

	kids := js.DOMObjectToList(children)
	var match bool

	for _, item := range kids {
		if item != target {
			continue
		}

		match = true
		break
	}

	// if we match then run the listeners registered.
	if match {
		dispatch.Dispatch(trees.EventBroadcast{
			EventID: source.EventID,
			Event:   trees.NewWrapperEvent(event),
		})
	}
}
Beispiel #2
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// QuerySelectorAll returns the result of querySelectorAll on an object
func QuerySelectorAll(o *js.Object, sel string) []*js.Object {
	if sad := o.Get("querySelectorAll"); sad == nil || sad == js.Undefined {
		return nil
	}

	return DOMObjectToList(o.Call("querySelectorAll", sel))
}
Beispiel #3
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// NewContext takes an HTML5 canvas object and optional context attributes.
// If an error is returned it means you won't have access to WebGL
// functionality.
func NewContext(canvas js.Object, ca *ContextAttributes) (*Context, error) {
	if js.Global.Get("WebGLRenderingContext") == js.Undefined {
		return nil, errors.New("Your browser doesn't appear to support webgl.")
	}

	if ca == nil {
		ca = DefaultAttributes()
	}

	attrs := map[string]bool{
		"alpha":                 ca.Alpha,
		"depth":                 ca.Depth,
		"stencil":               ca.Stencil,
		"antialias":             ca.Antialias,
		"premultipliedAlpha":    ca.PremultipliedAlpha,
		"preserveDrawingBuffer": ca.PreserveDrawingBuffer,
	}
	gl := canvas.Call("getContext", "webgl", attrs)
	if gl == nil {
		gl = canvas.Call("getContext", "experimental-webgl", attrs)
		if gl == nil {
			return nil, errors.New("Creating a webgl context has failed.")
		}
	}
	ctx := new(Context)
	ctx.Object = gl
	return ctx, nil
}
Beispiel #4
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func MakeWorkspace(canvas *js.Object) *Workspace {
	doc := js.Global.Get("document")
	ctx := canvas.Call("getContext", "2d")
	w := &Workspace{
		doc:       doc,
		canvas:    canvas,
		ctx:       ctx,
		x:         canvas.Get("offsetLeft").Int(),
		y:         canvas.Get("offsetTop").Int(),
		dx:        canvas.Get("offsetWidth").Int(),
		dy:        canvas.Get("offsetHeight").Int(),
		images:    make(chan schema.ImageManifest),
		disks:     make(chan string),
		ingresses: make(chan int),
		draw:      make(chan struct{}),
		mouseDown: make(chan point),
		mouseMove: make(chan point),
		mouseUp:   make(chan point),
		makeItSo:  make(chan struct{}),
		cut:       make(chan struct{}),
	}
	doc.Call("addEventListener", "mousedown", js.MakeFunc(w.onMouseDown), "false")
	doc.Call("addEventListener", "mousemove", js.MakeFunc(w.onMouseMove), "false")
	doc.Call("addEventListener", "mouseup", js.MakeFunc(w.onMouseUp), "false")
	go w.run()
	return w
}
Beispiel #5
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func (ws *webSocket) sendPayload(action *Action) (err error) {
	defer func() {
		err = jsError(recover())
	}()

	decodeDataURI := (action.String() == "update_user")

	for _, frame := range action.Payload {
		var data *js.Object = frame

		if decodeDataURI {
			base64 := data.Call("split", ",").Index(1)
			binaryString := js.Global.Call("atob", base64)
			length := binaryString.Length()
			data = js.Global.Get("ArrayBuffer").New(length)
			array := js.Global.Get("Uint8Array").New(data)

			for i := 0; i < length; i++ {
				array.SetIndex(i, binaryString.Call("charCodeAt", i))
			}
		}

		ws.impl.Call("send", data)
	}

	return
}
Beispiel #6
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// DOMObjectToList takes a jsobjects and returns a list of internal objects by calling the item method
func DOMObjectToList(o *js.Object) []*js.Object {
	var out []*js.Object
	length := o.Get("length").Int()
	for i := 0; i < length; i++ {
		out = append(out, o.Call("item", i))
	}
	return out
}
Beispiel #7
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func New(el *js.Object) *Canvas {
	return &Canvas{
		Element: el,
		ctx:     el.Call("getContext", "2d"),
		Width:   el.Get("width").Int(),
		Height:  el.Get("height").Int(),
	}
}
Beispiel #8
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// CleanAllTextNode removes all texts nodes within the container root
func CleanAllTextNode(o *js.Object) {
	for _, to := range ChildNodeList(o) {
		if istx, isem := EmptyTextNode(to); istx {
			if !isem {
				o.Call("removeChild", to)
			}
		}
	}
}
Beispiel #9
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// SpecialAppendChild takes a list of objects and calls appendNode on the given object, but checks if the objects contain an unknownelement with a text tag then strip the tagname and only apply its content
func SpecialAppendChild(o *js.Object, osets ...*js.Object) {
	for _, onode := range osets {
		if strings.ToLower(onode.Get("tagName").String()) == "text" {
			SpecialAppendChild(o, ChildNodeList(onode)...)
			continue
		}
		o.Call("appendChild", onode)
	}
}
Beispiel #10
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func toggleDebugOverlay(e js.Object) {
	e.Call("preventDefault")
	d := js.Global.Get("document").Call("getElementById", "debug_overlay")
	if d.Get("style").Get("display").Str() == "block" {
		d.Get("style").Set("display", "none")
		return
	}
	d.Get("style").Set("display", "block")
}
Beispiel #11
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Datei: dom.go Projekt: influx6/gu
// BindEvent connects the event with the provided event object and root.
func (dm *DOMRenderer) BindEvent(source *trees.Event, root *gjs.Object) {
	source.Link = func(ev *gjs.Object) { dm.TriggerBindEvent(ev, root, source) }

	root.Call("addEventListener", source.Type, source.Link, true)

	source.Handle.AddEnd(func() {
		root.Call("removeEventListener", source.Type, source.Link, true)
	})
}
Beispiel #12
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// CleanAllTextNode removes all texts nodes within the container root
func CleanAllTextNode(o *js.Object) {
	for _, to := range ChildNodeList(o) {
		if istx, isem := EmptyTextNode(to); istx {
			if !isem {
				// log.Printf("Cleaning Text Node: %s", to.Get("textContent").String())
				o.Call("removeChild", to)
			}
		}
	}
}
Beispiel #13
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// New returns a new Canvas that wraps the <canvas> elem. This will
// most likely be retrieved using
//
//     js.Global.Get("document").Call("getElementById", id)
//
// If the browser doesn't support CanvasRenderingContext2D, an error
// is returned.
func New(elem *js.Object) (*Canvas, error) {
	if js.Global.Get("CanvasRenderingContext2D") == nil {
		return nil, errors.New("Browser doesn't support canvas 2D")
	}

	return &Canvas{
		elem: elem,
		ctx:  elem.Call("getContext", "2d"),
	}, nil
}
func NewCanvas(parent *js.Object, width, height int) *Canvas {
	document := js.Global.Get("document")
	canvas := document.Call("createElement", "canvas")
	parent.Call("appendChild", canvas)

	canvas.Set("width", width)
	canvas.Set("height", height)

	context := canvas.Call("getContext", "2d")

	return &Canvas{canvas, context, image.Rect(0, 0, width, height)}
}
Beispiel #15
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// ContextAppendChild takes a list of objects and calls appendNode on the given object
func ContextAppendChild(o *js.Object, osets ...*js.Object) {
	for _, onode := range osets {

		if doHeadAppend(onode) {
			continue
		}

		if scripts := QuerySelectorAll(onode, "scripts"); len(scripts) != 0 {
			for _, script := range scripts {
				doHeadAppend(script)
			}
		}

		o.Call("appendChild", onode)
	}
}
Beispiel #16
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func createJsWebsocket(scope *js.Object) *Websocket {
	websocketUrl := fmt.Sprintf("ws://%s/chat", GetWindowHost())
	websocket := NewWebsocket(websocketUrl, func(event *js.Object) {
		stringData := event.Get("data").String()

		message := chat.MessageData{}
		json.Unmarshal([]byte(stringData), &message)

		scope.Call("showMessage", message)
		// force refresh scope data for async data binding
		scope.Call("$apply")
		ScrollToChatBottom()
	})

	return websocket
}
Beispiel #17
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func updateScreen(canvas *js.Object, video []byte) {
	ctx := canvas.Call("getContext", "2d")
	img := ctx.Call("getImageData", 0, 0, imgWidth, imgHeight)
	data := img.Get("data")

	arrBuf := js.Global.Get("ArrayBuffer").New(data.Length())
	buf8 := js.Global.Get("Uint8ClampedArray").New(arrBuf)
	buf32 := js.Global.Get("Uint32Array").New(arrBuf)

	buf := buf32.Interface().([]uint)

	for i := 0; i < len(video); i += 3 {
		buf[i/3] = 0xFF000000 | (uint(video[i]) << 16) | (uint(video[i+1]) << 8) | uint(video[i+2])
	}

	data.Call("set", buf8)
	ctx.Call("putImageData", img, 0, 0)
}
Beispiel #18
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func main() {
	fmt.Println("gopherjs+electronテスト")
	fmt.Printf("js: %v\n", js.Global.Get("process").Get("version"))
	fmt.Printf("electron: %v\n", js.Global.Get("process").Get("versions").Get("electron"))

	window_options := []byte(`
   		{
   		    "width": 1280
   		    , "height": 720
			, "web-preferences": {
				}
   		}
	`)
	var window_options_json map[string]interface{}
	err := json.Unmarshal(window_options, &window_options_json)
	if err != nil {
		panic(err)
	}

	//init electron app
	app := js.Global.Call("require", "app")
	js.Global.Call("require", "crash-reporter").Call("start")
	browserWindow := js.Global.Call("require", "browser-window")

	var mainWindow *js.Object

	app.Call("on", "window-all-closed", func() {
		if js.Global.Get("process").Get("platform").String() != "darwin" {
			app.Call("quit")
		}
	})

	app.Call("on", "ready", func() {
		mainWindow = browserWindow.New(window_options_json)

		_, filename, _, _ := runtime.Caller(1)
		url := "file:///" + path.Join(path.Dir(filename), "index.html")
		mainWindow.Call("loadUrl", url)

		mainWindow.Call("on", "closed", func() {
			mainWindow = nil
		})
	})
}
Beispiel #19
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func unwrap(v, t *js.Object) (*js.Object, *js.Object) {
Loop:
	for {
		switch t.Get("kind").Int() {
		case ptrKind:
			if v.Get("$val") != t.Get("nil") {
				v = v.Call("$get")
				t = t.Get("elem")
			} else {
				break Loop
			}
		case interfaceKind:
			t = v.Get("constructor")
			v = v.Get("$val")
		default:
			break Loop
		}
	}
	return v, t
}
func RenderNode(vnode *VNode) *js.Object {
	var dnode *js.Object
	switch vnode.Tag {
	case tagText:
		dnode = js.Global.Get("document").Call("createTextNode", vnode.Data)
	case tagRaw:
		dnode = js.Global.Get("document").Call("createRange").Call("createContextualFragment", vnode.Data)
	default:
		dnode = js.Global.Get("document").Call("createElement", vnode.Tag)

		for k, v := range vnode.Attributes {
			dnode.Call("setAttribute", k, v)
		}

		for _, child := range vnode.Children {
			dnode.Call("appendChild", RenderNode(child))
		}
	}

	return dnode
}
Beispiel #21
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func printValueAt(e js.Object, name string, value string) {
	targets := []js.Object{}
	if e.Get("name").Str() == name {
		targets = append(targets, e)
	}
	query := fmt.Sprintf("*[name=\"%s\"]", html.EscapeString(name))
	es := e.Call("querySelectorAll", query)
	for i := 0; i < es.Length(); i++ {
		targets = append(targets, es.Index(i))
	}

	if e.Get("dataset").Get(toDatasetProp(datasetAttrKey)).Str() == name {
		targets = append(targets, e)
	}
	query = fmt.Sprintf(
		"*[data-%s=\"%s\"]",
		html.EscapeString(datasetAttrKey),
		html.EscapeString(name))
	es = e.Call("querySelectorAll", query)
	for i := 0; i < es.Length(); i++ {
		targets = append(targets, es.Index(i))
	}

	for _, e := range targets {
		if e.Call("hasAttribute", "value").Bool() {
			e.Set("value", value)
		} else {
			e.Set("textContent", value)
		}
	}
}
Beispiel #22
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func addEventListenersId(document *js.Object, id string, ls []interface{}) {
	for _, l := range ls {
		if v, ok := l.(ClickInterface); ok {
			x := document.Call("getElementById", id)
			x.Call("addEventListener", "click",
				func(e *MouseEvent) {
					e.Init()
					v.Click(e)
				}, false)
		}
		if v, ok := l.(LoadInterface); ok {
			// Fixme event never fires snice main is called from load.
			w := js.Global.Get("window")
			// w := document.Call("getElementById", id)
			// w := document
			f := func(e *Event) {
				e.Init()
				v.Load(e)
			}
			w.Call("addEventListener", "load", f, false)
		}
	}
}
Beispiel #23
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// ShowContextMenu shows the context menu
func ShowContextMenu(event *js.Object) {
	event.Call("stopPropagation")
	event.Call("preventDefault")

	ctxMenu := jq("#contextmenu")

	x := event.Get("pageX").Int()
	y := event.Get("pageY").Int()
	width := jq(js.Global.Get("window")).Width()
	height := jq(js.Global.Get("window")).Height()

	if x+ctxMenu.Width() > width {
		x -= ctxMenu.Width()
	}
	if y+ctxMenu.Height() > height {
		y -= ctxMenu.Height()
	}

	ctxMenu.SetCss(map[string]interface{}{
		"top":  y,
		"left": x,
	})
	ctxMenu.RemoveClass("hidden")
}
Beispiel #24
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func newContext(canvas *js.Object, ca *contextAttributes) (context *js.Object, err error) {
	if js.Global.Get("WebGLRenderingContext") == js.Undefined {
		return nil, errors.New("Your browser doesn't appear to support WebGL.")
	}

	attrs := map[string]bool{
		"alpha":                           ca.Alpha,
		"depth":                           ca.Depth,
		"stencil":                         ca.Stencil,
		"antialias":                       ca.Antialias,
		"premultipliedAlpha":              ca.PremultipliedAlpha,
		"preserveDrawingBuffer":           ca.PreserveDrawingBuffer,
		"preferLowPowerToHighPerformance": ca.PreferLowPowerToHighPerformance,
		"failIfMajorPerformanceCaveat":    ca.FailIfMajorPerformanceCaveat,
	}

	if gl := canvas.Call("getContext", "webgl", attrs); gl != nil {
		return gl, nil
	} else if gl := canvas.Call("getContext", "experimental-webgl", attrs); gl != nil {
		return gl, nil
	} else {
		return nil, errors.New("Creating a WebGL context has failed.")
	}
}
Beispiel #25
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func (v *HTMLView) addEventListeners(items Items, form js.Object) {
	inputDate := form.Call("querySelector", "input[name=Date]")
	inputDate.Set("onchange", func(e js.Object) {
		id, err := getIDFromElement(e.Get("target"))
		if err != nil {
			v.onErrorFunc(err)
			return
		}
		dateStr := e.Get("target").Get("value").Str()
		d, err := date.ParseISO8601(dateStr)
		if err != nil {
			v.onErrorFunc(err)
			return
		}
		if err := items.UpdateDate(id, d); err != nil {
			v.onErrorFunc(err)
			return
		}
	})
	inputSubject := form.Call("querySelector", "input[name=Subject]")
	inputSubject.Set("onchange", func(e js.Object) {
		id, err := getIDFromElement(e.Get("target"))
		if err != nil {
			v.onErrorFunc(err)
			return
		}
		subject := e.Get("target").Get("value").Str()
		if err := items.UpdateSubject(id, subject); err != nil {
			v.onErrorFunc(err)
			return
		}
	})
	inputMoneyAmount := form.Call("querySelector", "input[name=Amount]")
	inputMoneyAmount.Set("onchange", func(e js.Object) {
		id, err := getIDFromElement(e.Get("target"))
		if err != nil {
			v.onErrorFunc(err)
			return
		}
		amount := int32(e.Get("target").Get("value").Int())
		if err := items.UpdateAmount(id, amount); err != nil {
			v.onErrorFunc(err)
			return
		}
	})
}
Beispiel #26
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func addEventListener(object *js.Object, eventName string, callback func(*js.Object)) {
	object.Call("addEventListener", eventName, callback)
}
Beispiel #27
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func reflectType(typ js.Object) *rtype {
	return (*rtype)(unsafe.Pointer(typ.Call("reflectType").Unsafe()))
}
Beispiel #28
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// SetAttribute calls setAttribute on the js object with the value and key
func SetAttribute(o *js.Object, key string, value string) {
	o.Call("setAttribute", key, value)
}
Beispiel #29
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// HasAttribute returns true/false if a key exists using the jsobject
func HasAttribute(o *js.Object, key string) bool {
	return o.Call("hasAttribute", key).Bool()
}
Beispiel #30
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// GetAttribute returns a string if a key exists using the jsobject
func GetAttribute(o *js.Object, key string) string {
	return o.Call("getAttribute", key).String()
}