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<template>
<div style="position: absolute;right: 0;bottom:0;width: 400px;border:1px solid #ccc">
<v-row>
<v-col cols="12" md="10">
<v-file-input ref="file" id="myfile" accept="pdf" label="Please select a file"></v-file-input>
</v-col>
<v-col cols="12" md="2">
<v-btn @click="loadFile" icon><v-icon>mdi-chevron-right</v-icon></v-btn>
</v-col>
</v-row>
<canvas style="zoom:0.3" id="mypdfview"></canvas><br />
<v-btn v-if="pdf && !loading" :disabled="pageNumber ==1" @click="prevPage" icon><v-icon>mdi-chevron-left</v-icon></v-btn>
<span v-if="pdf && !loading">{{pageNumber}} / {{pdf.numPages}}</span>
<v-btn v-if="pdf && !loading" :disabled="pdf.numPages == pageNumber" @click="nextPage" icon><v-icon>mdi-chevron-right</v-icon></v-btn>
<v-row>
<v-col cols="12" md="12">
<v-btn v-if="pdf && !loading" @click="stop">stop pdf share</v-btn>
</v-col>
</v-row>
</div>
</template>
<script>
import pdfjsLib from 'pdfjs-dist/webpack';
const toBase64 = file => new Promise((resolve, reject) => {
const reader = new FileReader();
reader.readAsDataURL(file);
reader.onload = () => resolve(reader.result);
reader.onerror = error => reject(error);
});
export default {
name: "PdfShare",
props: {
janusInit: Object,
onstop: Function,
username: String,
myrivid: Number,
room: Number,
opaqueId:String
},
data: () => ({
pdf: null,
pageNumber: 1,
loading: true,
pluginHandle: null,
intervalId: null
}),
mounted () {
pdfjsLib.GlobalWorkerOptions.workerSrc = "/pdf.worker.js"
},
methods: {
renderPage(pageNumber) {
this.pdf.getPage(pageNumber).then(page => {
console.log('Page loaded');
var scale = 1.0;
var viewport = page.getViewport({scale: scale});
// Prepare canvas using PDF page dimensions
var canvas = document.getElementById('mypdfview');
var context = canvas.getContext('2d');
canvas.height = viewport.height;
canvas.width = viewport.width;
// Render PDF page into canvas context
var renderContext = {
canvasContext: context,
viewport: viewport
};
var renderTask = page.render(renderContext);
renderTask.promise.then( () => {
this.loading = false
if (!this.pluginHandle) {
// document.getElementById('pdfvid').srcObject = document.getElementById('mypdfview').captureStream(60)
this.janusInit.attach(
{
plugin: "janus.plugin.videoroom",
opaqueId: this.opaqueId,
success: this.janusPluginSuccess,
consentDialog: this.consentDialog,
error: this.janusPluginError,
mediaState: this.mediaState,
webrtcState: this.webrtcState,
onmessage: this.janusMessage,
onlocalstream: this.onlocalstream
}
)
}
});
});
},
janusPluginSuccess (pluginHandle) {
this.pluginHandle = pluginHandle
var register = { "request": "join", "room": this.room, "ptype": "publisher", "display": this.username + '- PDF' };
pluginHandle.send({"message": register});
},
stop(){
var unpublish = { "request": "unpublish"};
this.pluginHandle.send({"message": unpublish});
this.pluginHandle.detach();
// reset
clearInterval(this.intervalId);
this.pluginHandle = null;
this.pdf = null;
this.pageNumber = 1;
this.loading = true;
// callback
this.onstop();
},
janusPluginError (error) {
console.log('error', error)
},
consentDialog () {
},
mediaState (medium, on) {
console.log("Janus " + (on ? "started" : "stopped") + " receiving our " + medium);
},
webrtcState (on) {
this.pluginHandle.send({"message": { "request": "configure", "bitrate": 1024*1000 }});
console.log(on, "webrt")
},
janusMessage (msg, jsep) {
console.log(msg)
console.log(jsep)
var event = msg["videoroom"];
if(event != undefined && event != null) {
if (event === "joined") {
this.createStream()
}
}
if(jsep !== undefined && jsep !== null) {
this.pluginHandle.handleRemoteJsep({jsep: jsep});
}
},
createStreamSuccess(jsep) {
console.log('createStreamSuccess')
var publish = { "request": "configure", "audio": false, "video": true };
this.pluginHandle.send({"message": publish, "jsep": jsep});
},
createStream() {
console.log('createStream')
this.pluginHandle.createOffer({
media: { audioRecv: false, videoRecv: false, audioSend: false, videoSend: true }, // Publishers are sendonly
stream: document.getElementById('mypdfview').captureStream(),
success: this.createStreamSuccess,
error: error => {
console.log(error)
alert(error)
}
})
},
pdfTimer () {
// pdf canvas update hack
var canvas = document.getElementById('mypdfview');
var context = canvas.getContext('2d');
var text = '.';
context.font = '25px Arial';
context.fillStyle = '0,0,0';
var x = 0;
var y = 0;
context.fillText(text, x, y);
},
nextPage () {
this.pageNumber++
this.renderPage(this.pageNumber)
},
prevPage () {
this.pageNumber--
this.renderPage(this.pageNumber)
},
onlocalstream (stream) {
// Janus.attachMediaStream($('#myvideo').get(0), stream);
console.log('pdf --------- onlocalstream')
console.log(stream)
},
async loadFile() {
console.log(this.$refs.file.files)
var file = document.querySelector('#myfile').files[0]
var pdfdata = await toBase64(file)
console.log(pdfdata.split('data:application/pdf;base64,')[1])
var loadingTask = pdfjsLib.getDocument({data: atob(pdfdata.split('data:application/pdf;base64,')[1])});
loadingTask.promise.then(pdf => {
console.log(pdf)
// var pageNumber = 1;
this.pdf = pdf
this.loading = true
this.intervalId = setInterval(this.pdfTimer, 1000/15)
this.renderPage(1)
})
}
}
}
</script>
<style scoped>
</style>