Congregation/presentation.html at master · Rewryte/Congregation · GitHub

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<!doctype html>
<html lang="en" data-bs-theme="dark">
<head>
  <meta charset="utf-8">
  <meta name="viewport" content="width=device-width, initial-scale=1">
  <title>Congregation</title>
  <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/css/bootstrap.min.css" rel="stylesheet" integrity="sha384-QWTKZyjpPEjISv5WaRU9OFeRpok6YctnYmDr5pNlyT2bRjXh0JMhjY6hW+ALEwIH" crossorigin="anonymous">
</head>
<body style="transition: background 0.5s, color 0.5s;">
  <div id="PresentationPreview" class="position-absolute top-50 start-50 translate-middle border border-2 overflow-hidden" style="width: 480px;height: 360px;">
    <div id="PresentationElement" class="bg-black overflow-hidden" style="width: 100%;height: 100%">
      <div id="LoadView" class="position-relative top-50 start-50 translate-middle text-center" style="">
          <h1 class="display-2">Congregation</h1>
          <div class="fs-3">Instant Presentations</div><br>
          <div class="spinner-border text-primary" role="status"></div>
      </div>
      <div id="TextView" class="position-relative top-50 start-50 translate-middle" style="display: none;transform-origin: top left;transition: width 2s, height 2s, scale 2s;">
          <h1 id="Title" class="display-2 text-center"></h1>
          <ul id="BulletList" class="list-group list-group-flush"></ul>
      </div>
      <iframe id="WebView" class="overflow-hidden" style="height: 100%;width: 100%;scale: 1;transform-origin: top left;display: none;"></iframe>
      <iframe id="FullWebView" class="overflow-hidden" style="height: 100%;width: 100%;display: none;"></iframe>
      <img id="ImageView" class="object-fit-contain" style="height: 100%;width: 100%;display: none;scale: 1;transition: width 2s, height 2s, scale 2s;" alt="image viewer">
      <video id="VideoView" class="" style="height: 100%;width: 100%;display: none;" controls autoplay></video>
    </div>
  </div>
  <div class="position-fixed bottom-0 start-0 w-100 p-4 text-center" style="background-color: rgba(0, 0, 0, 0.5);">
    <div class="row">
      <div class="col text-start">
        <h3 class="d-inline align-middle me-2">Display:</h3>
        <div class="dropdown d-inline">
          <button id="DisplayDropdown" class="btn btn-secondary btn-lg dropdown-toggle" type="button" data-bs-toggle="dropdown" aria-expanded="false">Select</button>
          <ul id="DisplayMenu" class="dropdown-menu">
            <li id="DisplayMenuTemplate" style="display: none;"><a class="dropdown-item">Label</a></li>
          </ul>
        </div>
      </div>
      <div class="col text-end">
        <button id="StartBtn" type="button" class="btn btn-primary btn-lg">Start</button>
      </div>
    </div>
  </div>
  <script>
    var CurrentView = "LoadView";
    var CurrentZoom = 1;
    function SwitchView( View ) {
      console.log( "Changing view to " + View );
      // Reset zoom when changing modes
      if ( View != "LoadView" && View != CurrentView ) {
        CurrentView = View;
        CurrentZoom = 1;
        ZoomView( CurrentZoom );
      }
      document.getElementById( "LoadView" ).style.display = "none";
      document.getElementById( "WebView" ).style.display = "none";
      document.getElementById( "FullWebView" ).style.display = "none";
      document.getElementById( "TextView" ).style.display = "none";
      document.getElementById( "ImageView" ).style.display = "none";
      document.getElementById( "VideoView" ).style.display = "none";
      document.getElementById( View ).style.display = "";
    }

    function ZoomView( ZoomFloat = 1 ) {
      console.log( "Changing zoom level to " + ZoomFloat );
      var TargetElement, TargetWidth, TargetHeight, TargetScale;
      switch ( CurrentView ) {
        case "LoadView":
          TargetElement = document.getElementById( "LoadView" );
          // Fit to viewport
          TargetScale = Math.min( window.innerWidth / 960, window.innerHeight / 720 );
          TargetElement.style.scale = ( TargetScale * 100 ) + "%";
          break;
        case "TextView":
          TargetElement = document.getElementById( "TextView" );
          TargetElement.style.scale = ( ZoomFloat * 100 ) + "%";
          break;
        case "WebView":
          TargetElement = document.getElementById( "WebView" );
          // Fix width but maintain aspect ratio
          TargetWidth = Math.floor( 960 / ZoomFloat );
          TargetHeight = Math.floor( TargetWidth / TargetElement.parentNode.offsetWidth * TargetElement.parentNode.offsetHeight );
          // Fit to viewport
          TargetScale = TargetElement.parentNode.offsetWidth / TargetWidth;
          TargetElement.style.width = TargetWidth + "px";
          TargetElement.style.height = TargetHeight + "px";
          TargetElement.style.scale = ( TargetScale * 100 ) + "%";
          if ( document.fullscreenElement ) {
            // Animate zoom in fullscreen but skip the first transition
            TargetElement.offsetWidth;
            TargetElement.style.transition = "width 2s, height 2s, scale 2s";
          }
          break;
        case "ImageView":
          TargetElement = document.getElementById( "ImageView" );
          TargetElement.style.scale = ( ZoomFloat * 100 ) + "%";
          break;
      }
    }

    function SetDarkMode( DarkMode ) {
      ( DarkMode == "true" ) ? document.documentElement.setAttribute( "data-bs-theme", "dark" ) : document.documentElement.setAttribute( "data-bs-theme", "light" );
    }

    function HandleText( TextStr ) {
      // Multiple bullet points are separated with double dashes
      const TextArr = TextStr.split( "--" );
      // First point used as title
      document.getElementById( "Title" ).innerText = TextArr.shift();
      document.getElementById( "BulletList" ).innerHTML = "";
      // Make an element for each remaining bullet point
      TextArr.forEach( ( BulletStr ) => {
        const ListItem = document.createElement( "li" );
        ListItem.className = "list-group-item fs-3";
        ListItem.textContent = BulletStr;
        document.getElementById( "BulletList" ).appendChild( ListItem );
      });
      SwitchView( "TextView" );
    }
    function HandleURL( url ) {
      document.getElementById( "StartBtn" ).disabled = true;
      document.getElementById( "WebView" ).src = url;
      SwitchView( "LoadView" );
    }
    function HandleURLFullRes( url ) {
      document.getElementById( "StartBtn" ).disabled = true;
      document.getElementById( "FullWebView" ).src = url;
      SwitchView( "LoadView" );
    }
    function HandleImage( data ) {
      document.getElementById( "ImageView" ).src = data;
      SwitchView( "ImageView" );
    }
    function HandleVideo( data ) {
      document.getElementById( "VideoView" ).src = data;
      SwitchView( "VideoView" );
      document.getElementById( "VideoView" ).load();
    }

    window.addEventListener( "message", ( Event ) => {
      var data = JSON.parse( Event.data );
      switch( data[0] ) {
        case "text":
          HandleText( data[1] );
          break;
        case "url":
          HandleURL( data[1] );
          break;
        case "urlfullres":
          HandleURLFullRes( data[1] );
          break;
        case "image":
          HandleImage( data[1] );
          break;
        case "video":
          HandleVideo( data[1] );
          break;
        case "zoomin":
          CurrentZoom = Math.min( CurrentZoom + 0.2 , 5 );
          ZoomView( CurrentZoom );
          break;
        case "zoomout":
          CurrentZoom = Math.max( CurrentZoom - 0.2 , 0.2 );
          ZoomView( CurrentZoom );
          break;
        case "darkmode":
          SetDarkMode( data[1] );
          break;
        default:
          console.log( "Invalid message received: " + Message.data )
      }
    });

    var SelectedScreen;
    async function PopulateDisplays() {
      const PrevSelectedScreen = localStorage.getItem( "SelectedScreen" );
      const ScreenDetails = await window.getScreenDetails();
      ScreenDetails.screens.forEach( ( Screen, Index ) => {
        const NewMenuItem = document.getElementById( "DisplayMenuTemplate" ).cloneNode( true );
        NewMenuItem.removeAttribute("id");
        const DisplayName = ( Screen.label ) ? Screen.label : ( Screen.isInternal ) ? "Built-in Display" : "Display " + Index;
        NewMenuItem.querySelector( "a.dropdown-item" ).textContent = ( Screen.isPrimary ) ? DisplayName + " (Main)" : DisplayName;
        NewMenuItem.onclick = () => {
          SelectedScreen = Screen;
          document.getElementById( "DisplayDropdown" ).textContent = DisplayName;
          if ( Screen.label != "" && PrevSelectedScreen != Screen.label ) { localStorage.setItem( "SelectedScreen", Screen.label ); }
        };
        // Use previous selected screen if present
        if ( PrevSelectedScreen != "" && PrevSelectedScreen == Screen.label ) {
          console.log( "Selecting last used screen: " + Screen.label );
          NewMenuItem.onclick();
        }
        NewMenuItem.style.display = "";
        document.getElementById( "DisplayMenu" ).appendChild( NewMenuItem );
      });
      // Auto-select if previous screen not found and only two screens
      if ( !SelectedScreen && ScreenDetails.screens.length == 2 ) {
        ScreenDetails.screens.forEach( ( Screen ) => {
          if ( !Screen.isPrimary ) {
            console.log( "Auto-selecting screen: " + Screen.label );
            SelectedScreen = Screen;
            const DisplayName = ( Screen.label ) ? Screen.label : ( Screen.isInternal ) ? "Built-in Display" : "Display " + Index;
            document.getElementById( "DisplayDropdown" ).textContent = DisplayName;
            if ( Screen.label != "" && PrevSelectedScreen != Screen.label ) { localStorage.setItem( "SelectedScreen", Screen.label ); }
          }
        });
      }
    }

    StartBtn.onclick = () => {
      document.getElementById( "PresentationElement" ).requestFullscreen( { screen: SelectedScreen } );
    }

    window.addEventListener( "load", () => {
      PopulateDisplays();
    });

    document.addEventListener( "fullscreenchange", () => {
      if ( document.fullscreenElement ) {
        // Refit to screen when entering fullscreen
        ZoomView( CurrentZoom );
      } else {
        // Close preview window when exiting fullscreen
        close();
      }
    });

    document.getElementById( "WebView" ).addEventListener( "load", () => {
      SwitchView( "WebView" );
      document.getElementById( "StartBtn" ).disabled = false;
    });

    document.getElementById( "FullWebView" ).addEventListener( "load", () => {
      SwitchView( "FullWebView" );
      document.getElementById( "StartBtn" ).disabled = false;
    });

    document.addEventListener( "keydown" , function( Event ) {
      if ( Event.key == "Escape" ) {
      close();
    }
});
  </script>
  <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.3/dist/js/bootstrap.bundle.min.js" integrity="sha384-YvpcrYf0tY3lHB60NNkmXc5s9fDVZLESaAA55NDzOxhy9GkcIdslK1eN7N6jIeHz" crossorigin="anonymous"></script>
</body>
</html>