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) // ImageConstant returns the image constant with "tag" name or "" if it is not exists ImageConstant(tag string) (string, bool) // SetCustomTheme set the custom theme SetCustomTheme(name string) bool // UserAgent returns the "user-agent" text of the client browser UserAgent() string // RemoteAddr returns the client address. RemoteAddr() string // 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) any // 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 any) 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) any setBrige(events chan DataObject, brige WebBrige) writeInitScript(writer *strings.Builder) runScript(script string) runGetterScript(script string) DataObject //, answer chan DataObject) handleAnswer(data DataObject) handleRootSize(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 startUpdateScript(htmlID string) updateScript(htmlID string) *strings.Builder finishUpdateScript(htmlID string) } type sessionData struct { customTheme Theme currentTheme Theme darkTheme bool touchScreen bool screenWidth int screenHeight int textDirection int pixelRatio float64 userAgent string 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 animationCSS string updateScripts map[string]*strings.Builder } 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 session.animationCSS = "" session.updateScripts = map[string]*strings.Builder{} if customTheme != "" { if theme, ok := CreateThemeFromText(customTheme); ok { session.customTheme = theme session.currentTheme = nil } } if value, ok := params.PropertyValue("touch"); ok { session.touchScreen = (value == "1" || value == "true") } if value, ok := params.PropertyValue("user-agent"); ok { session.userAgent = value } if value, ok := params.PropertyValue("direction"); ok { if value == "rtl" { session.textDirection = RightToLeftDirection } } if value, ok := params.PropertyValue("language"); ok { session.language = value } 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) any { if style := session.getCurrentTheme().style(styleTag); style != nil { return style.getRaw(propertyTag) } //errorLogF(`property "%v" not found`, 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 { session.rootView.setParentID("ruiRootView") return true } } return false } func (session *sessionData) RootView() View { return session.rootView } func (session *sessionData) writeInitScript(writer *strings.Builder) { if css := session.getCurrentTheme().cssText(session); css != "" { css = strings.ReplaceAll(css, "\n", `\n`) css = strings.ReplaceAll(css, "\t", `\t`) 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) css := appStyles + session.getCurrentTheme().cssText(session) + session.animationCSS css = strings.ReplaceAll(css, "\n", `\n`) css = strings.ReplaceAll(css, "\t", `\t`) buffer.WriteString(`document.querySelector('style').textContent = "`) buffer.WriteString(css) buffer.WriteString("\";\n") if session.rootView != nil { buffer.WriteString(`document.getElementById('ruiRootView').innerHTML = '`) viewHTML(session.rootView, buffer) buffer.WriteString("';\nscanElementsSize();") } 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) any { if view := ViewByID(session.RootView(), viewID); view != nil { return view.Get(tag) } return nil } func (session *sessionData) Set(viewID, tag string, value any) 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) handleRootSize(data DataObject) { getValue := func(tag string) int { if value, ok := data.PropertyValue(tag); ok { float, err := strconv.ParseFloat(value, 64) if err == nil { return int(float) } ErrorLog(`Resize event error: ` + err.Error()) } else { ErrorLogF(`Resize event error: the property "%s" not found`, tag) } return 0 } if w := getValue("width"); w > 0 { session.screenWidth = w } if h := getValue("height"); h > 0 { session.screenHeight = h } } 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 view := session.viewByHTMLID(viewID[:n]); view != nil { view.onItemResize(view, viewID[n+1:], getFloat("x"), getFloat("y"), getFloat("width"), getFloat("height")) } else { DebugLogF(`View with id == %s not found`, viewID[:n]) } } 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 { DebugLogF(`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 if command != "clickOutsidePopup" { 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() + `");`) } func (session *sessionData) RemoteAddr() string { return session.brige.remoteAddr() }