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rui/videoPlayer.go

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Go
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2021-09-07 17:36:50 +03:00
package rui
import (
"fmt"
"strings"
)
const (
// VideoWidth is the constant for the "video-width" property tag of VideoPlayer.
// The "video-width" float property defines the width of the video's display area in pixels.
VideoWidth = "video-width"
// VideoHeight is the constant for the "video-height" property tag of VideoPlayer.
// The "video-height" float property defines the height of the video's display area in pixels.
VideoHeight = "video-height"
// Poster is the constant for the "poster" property tag of VideoPlayer.
// The "poster" property defines an URL for an image to be shown while the video is downloading.
// If this attribute isn't specified, nothing is displayed until the first frame is available,
// then the first frame is shown as the poster frame.
Poster = "poster"
)
type VideoPlayer interface {
MediaPlayer
}
type videoPlayerData struct {
mediaPlayerData
}
// NewVideoPlayer create new MediaPlayer object and return it
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func NewVideoPlayer(session Session, params Params) VideoPlayer {
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view := new(videoPlayerData)
view.Init(session)
view.tag = "VideoPlayer"
setInitParams(view, params)
return view
}
func newVideoPlayer(session Session) View {
return NewVideoPlayer(session, nil)
}
func (player *videoPlayerData) Init(session Session) {
player.mediaPlayerData.Init(session)
player.tag = "VideoPlayer"
}
func (player *videoPlayerData) htmlTag() string {
return "video"
}
func (player *videoPlayerData) Remove(tag string) {
player.remove(strings.ToLower(tag))
}
func (player *videoPlayerData) remove(tag string) {
switch tag {
case VideoWidth:
delete(player.properties, tag)
removeProperty(player.htmlID(), "width", player.Session())
case VideoHeight:
delete(player.properties, tag)
removeProperty(player.htmlID(), "height", player.Session())
case Poster:
delete(player.properties, tag)
removeProperty(player.htmlID(), Poster, player.Session())
default:
player.mediaPlayerData.remove(tag)
}
}
func (player *videoPlayerData) Set(tag string, value interface{}) bool {
return player.set(strings.ToLower(tag), value)
}
func (player *videoPlayerData) set(tag string, value interface{}) bool {
if value == nil {
player.remove(tag)
return true
}
if player.mediaPlayerData.set(tag, value) {
session := player.Session()
updateSize := func(cssTag string) {
if size, ok := floatProperty(player, tag, session, 0); ok {
if size > 0 {
updateProperty(player.htmlID(), cssTag, fmt.Sprintf("%g", size), session)
} else {
removeProperty(player.htmlID(), cssTag, session)
}
}
}
switch tag {
case VideoWidth:
updateSize("width")
case VideoHeight:
updateSize("height")
case Poster:
if url, ok := stringProperty(player, Poster, session); ok {
updateProperty(player.htmlID(), Poster, url, session)
}
}
return true
}
return false
}
func (player *videoPlayerData) htmlProperties(self View, buffer *strings.Builder) {
player.mediaPlayerData.htmlProperties(self, buffer)
session := player.Session()
if size, ok := floatProperty(player, VideoWidth, session, 0); ok && size > 0 {
buffer.WriteString(fmt.Sprintf(` width="%g"`, size))
}
if size, ok := floatProperty(player, VideoHeight, session, 0); ok && size > 0 {
buffer.WriteString(fmt.Sprintf(` height="%g"`, size))
}
if url, ok := stringProperty(player, Poster, session); ok && url != "" {
buffer.WriteString(` poster="`)
buffer.WriteString(url)
buffer.WriteString(`"`)
}
}