package rui import ( "fmt" "strconv" "strings" ) // SessionContent is the interface of a session content type SessionContent interface { CreateRootView(session Session) View } // Session provide interface to session parameters assess type Session interface { // App return the current application interface App() Application // ID return the id of the session ID() int // DarkTheme returns "true" if the dark theme is used DarkTheme() bool // Mobile returns "true" if current session is displayed on a touch screen device TouchScreen() bool // PixelRatio returns the ratio of the resolution in physical pixels to the resolution // in logical pixels for the current display device. PixelRatio() float64 // TextDirection returns the default text direction (LeftToRightDirection (1) or RightToLeftDirection (2)) TextDirection() int // Constant returns the constant with "tag" name or "" if it is not exists Constant(tag string) (string, bool) // Color returns the color with "tag" name or 0 if it is not exists Color(tag string) (Color, bool) // SetCustomTheme set the custom theme SetCustomTheme(name string) bool // Language returns the current session language Language() string // SetLanguage set the current session language SetLanguage(lang string) // GetString returns the text for the current language GetString(tag string) (string, bool) // Content returns the SessionContent of session Content() SessionContent setContent(content SessionContent, self Session) bool // SetTitle sets the text of the browser title/tab SetTitle(title string) // SetTitleColor sets the color of the browser navigation bar. Supported only in Safari and Chrome for android SetTitleColor(color Color) // RootView returns the root view of the session RootView() View // Get returns a value of the view (with id defined by the first argument) property with name defined by the second argument. // The type of return value depends on the property. If the property is not set then nil is returned. Get(viewID, tag string) interface{} // Set sets the value (third argument) of the property (second argument) of the view with id defined by the first argument. // Return "true" if the value has been set, in the opposite case "false" are returned and // a description of the error is written to the log Set(viewID, tag string, value interface{}) bool // DownloadFile downloads (saves) on the client side the file located at the specified path on the server. DownloadFile(path string) //DownloadFileData downloads (saves) on the client side a file with a specified name and specified content. DownloadFileData(filename string, data []byte) registerAnimation(props []AnimatedProperty) string resolveConstants(value string) (string, bool) checkboxOffImage() string checkboxOnImage() string radiobuttonOffImage() string radiobuttonOnImage() string viewByHTMLID(id string) View nextViewID() string styleProperty(styleTag, property string) (string, bool) stylePropertyNode(styleTag, propertyTag string) DataNode setBrige(events chan DataObject, brige WebBrige) writeInitScript(writer *strings.Builder) runScript(script string) runGetterScript(script string) DataObject //, answer chan DataObject) handleAnswer(data DataObject) handleResize(data DataObject) handleViewEvent(command string, data DataObject) close() onStart() onFinish() onPause() onResume() onDisconnect() onReconnect() ignoreViewUpdates() bool setIgnoreViewUpdates(ignore bool) popupManager() *popupManager imageManager() *imageManager } type sessionData struct { customTheme *theme darkTheme bool touchScreen bool textDirection int pixelRatio float64 language string languages []string checkboxOff string checkboxOn string radiobuttonOff string radiobuttonOn string app Application sessionID int viewCounter int content SessionContent rootView View ignoreUpdates bool popups *popupManager images *imageManager brige WebBrige events chan DataObject animationCounter int } func newSession(app Application, id int, customTheme string, params DataObject) Session { session := new(sessionData) session.app = app session.sessionID = id session.darkTheme = false session.touchScreen = false session.pixelRatio = 1 session.textDirection = LeftToRightDirection session.languages = []string{} session.viewCounter = 0 session.ignoreUpdates = false session.animationCounter = 0 if customTheme != "" { if theme, ok := newTheme(customTheme); ok { session.customTheme = theme } } if value, ok := params.PropertyValue("touch"); ok { session.touchScreen = (value == "1" || value == "true") } if value, ok := params.PropertyValue("direction"); ok { if value == "rtl" { session.textDirection = RightToLeftDirection } } if value, ok := params.PropertyValue("languages"); ok { session.languages = strings.Split(value, ",") } if value, ok := params.PropertyValue("dark"); ok { session.darkTheme = (value == "1" || value == "true") } if value, ok := params.PropertyValue("pixel-ratio"); ok { if f, err := strconv.ParseFloat(value, 64); err != nil { ErrorLog(err.Error()) } else { session.pixelRatio = f } } return session } func (session *sessionData) App() Application { return session.app } func (session *sessionData) ID() int { return session.sessionID } func (session *sessionData) setBrige(events chan DataObject, brige WebBrige) { session.events = events session.brige = brige } func (session *sessionData) close() { if session.events != nil { session.events <- ParseDataText(`session-close{session="` + strconv.Itoa(session.sessionID) + `"}`) } } func (session *sessionData) styleProperty(styleTag, propertyTag string) (string, bool) { var style DataObject ok := false if session.customTheme != nil { style, ok = session.customTheme.styles[styleTag] } if !ok { style, ok = defaultTheme.styles[styleTag] } if ok { if node := style.PropertyWithTag(propertyTag); node != nil && node.Type() == TextNode { return session.resolveConstants(node.Text()) } } //errorLogF(`property "%v" not found`, propertyTag) return "", false } func (session *sessionData) stylePropertyNode(styleTag, propertyTag string) DataNode { var style DataObject ok := false if session.customTheme != nil { style, ok = session.customTheme.styles[styleTag] } if !ok { style, ok = defaultTheme.styles[styleTag] } if ok { return style.PropertyWithTag(propertyTag) } return nil } func (session *sessionData) nextViewID() string { session.viewCounter++ return fmt.Sprintf("id%06d", session.viewCounter) } func (session *sessionData) viewByHTMLID(id string) View { if session.rootView == nil { return nil } popupManager := session.popupManager() for _, popup := range popupManager.popups { if view := popup.viewByHTMLID(id); view != nil { return view } } return viewByHTMLID(id, session.rootView) } func (session *sessionData) Content() SessionContent { return session.content } func (session *sessionData) setContent(content SessionContent, self Session) bool { if content != nil { session.content = content session.rootView = content.CreateRootView(self) if session.rootView != nil { return true } } return false } func (session *sessionData) RootView() View { return session.rootView } func (session *sessionData) writeInitScript(writer *strings.Builder) { var workTheme *theme if session.customTheme == nil { workTheme = defaultTheme } else { workTheme = new(theme) workTheme.init() workTheme.concat(defaultTheme) workTheme.concat(session.customTheme) } if css := workTheme.cssText(session); css != "" { writer.WriteString(`document.querySelector('style').textContent += "`) writer.WriteString(css) writer.WriteString("\";\n") } if session.rootView != nil { writer.WriteString(`document.getElementById('ruiRootView').innerHTML = '`) viewHTML(session.rootView, writer) writer.WriteString("';\nscanElementsSize();") } } func (session *sessionData) reload() { buffer := allocStringBuilder() defer freeStringBuilder(buffer) session.writeInitScript(buffer) session.runScript(buffer.String()) } func (session *sessionData) ignoreViewUpdates() bool { return session.brige == nil || session.ignoreUpdates } func (session *sessionData) setIgnoreViewUpdates(ignore bool) { session.ignoreUpdates = ignore } func (session *sessionData) Get(viewID, tag string) interface{} { if view := ViewByID(session.RootView(), viewID); view != nil { return view.Get(tag) } return nil } func (session *sessionData) Set(viewID, tag string, value interface{}) bool { if view := ViewByID(session.RootView(), viewID); view != nil { return view.Set(tag, value) } return false } func (session *sessionData) popupManager() *popupManager { if session.popups == nil { session.popups = new(popupManager) session.popups.popups = []Popup{} } return session.popups } func (session *sessionData) imageManager() *imageManager { if session.images == nil { session.images = new(imageManager) session.images.images = make(map[string]*imageData) } return session.images } func (session *sessionData) runScript(script string) { if session.brige != nil { session.brige.WriteMessage(script) } else { ErrorLog("No connection") } } func (session *sessionData) runGetterScript(script string) DataObject { //}, answer chan DataObject) { if session.brige != nil { return session.brige.RunGetterScript(script) } ErrorLog("No connection") result := NewDataObject("error") result.SetPropertyValue("text", "No connection") return result } func (session *sessionData) handleAnswer(data DataObject) { session.brige.AnswerReceived(data) } func (session *sessionData) handleResize(data DataObject) { if node := data.PropertyWithTag("views"); node != nil && node.Type() == ArrayNode { for _, el := range node.ArrayElements() { if el.IsObject() { obj := el.Object() getFloat := func(tag string) float64 { if value, ok := obj.PropertyValue(tag); ok { f, err := strconv.ParseFloat(value, 64) if err == nil { return f } ErrorLog(`Resize event error: ` + err.Error()) } else { ErrorLogF(`Resize event error: the property "%s" not found`, tag) } return 0 } if viewID, ok := obj.PropertyValue("id"); ok { if n := strings.IndexRune(viewID, '-'); n > 0 { if index, err := strconv.Atoi(viewID[n+1:]); err == nil { if view := session.viewByHTMLID(viewID[:n]); view != nil { view.onItemResize(view, index, getFloat("x"), getFloat("y"), getFloat("width"), getFloat("height")) } else { ErrorLogF(`View with id == %s not found`, viewID[:n]) } } else { ErrorLogF(`Invalid view id == %s not found`, viewID) } } else if view := session.viewByHTMLID(viewID); view != nil { view.onResize(view, getFloat("x"), getFloat("y"), getFloat("width"), getFloat("height")) view.setScroll(getFloat("scroll-x"), getFloat("scroll-y"), getFloat("scroll-width"), getFloat("scroll-height")) } else { ErrorLogF(`View with id == %s not found`, viewID) } } else { ErrorLog(`"id" property not found`) } } else { ErrorLog(`Resize event error: views element is not object`) } } } else { ErrorLog(`Resize event error: invalid "views" property`) } } func (session *sessionData) handleViewEvent(command string, data DataObject) { if viewID, ok := data.PropertyValue("id"); ok { if view := session.viewByHTMLID(viewID); view != nil { view.handleCommand(view, command, data) } } else { ErrorLog(`"id" property not found. Event: ` + command) } } func (session *sessionData) SetTitle(title string) { title, _ = session.GetString(title) session.runScript(`document.title = "` + title + `";`) } func (session *sessionData) SetTitleColor(color Color) { session.runScript(`setTitleColor("` + color.cssString() + `");`) }