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Commit 6fad943d authored by Leon Clarke's avatar Leon Clarke
Browse files

http://b/issue?id=2516676 

Correctly scale the play button and youtube logo when embedded
youtube videos are displayed at smaller than the suggested size.
parent bb961a05

core/res/assets/webkit/youtube.html

+74 −31
Original line number Diff line number Diff line
@@ -5,18 +5,6 @@ 
      a:hover   { text-decoration: none; }

      a:link    { color: black; }

      a:visited { color: black; }

      #bg {

        position: fixed;

        margin: 0px;

        border: 0px;

        padding: 0px;

        left: 0px;

        top: 0px;

        width: 100%;

        height: 100%;

        overflow: hidden;

        z-index: 0;

      }

      #main {

        position: absolute;

        left: 0%;
@@ -28,26 +16,81 @@ 
      }

    </style>

  </head>

  <body>

    <div id="bg">

      <img src="http://img.youtube.com/vi/VIDEO_ID/0.jpg"

      style="width:100%; height:100%"/>

    </div>

  <body id="body">

  <script type="text/javascript">

    // Nominal original size. If the embed is smaller than this, the play and logo

    // images get scaled appropriately. These are actually 3/4 of the sizes suggested

    // by youtube, so the images don't get too tiny.

    defHeight = 258;

    defWidth = 318;



    function setup() {

        var width = document.body.clientWidth;

        var height = document.body.clientHeight;

        var canvas = document.getElementById("canvas");

        // Resize the canvas to the right size

        canvas.width = width;

        canvas.height = height;

        var ctx = canvas.getContext('2d');

        var loadcount = 0;

        function doload() {

            if (++loadcount == 3) {

                // All images are loaded, so display them.

                // (Note that the images are loaded from javascript, so might load

                // after document.onload fires)

                ctx.drawImage(background, 0, 0, width, height);

                playWidth = play.width;

                playHeight = play.height;

                logoWidth = logo.width;

                logoHeight = logo.height;

                var ratio = 1;

                // If the page is smaller than it 'should' be in either dimension

                // we scale the play button and logo according to the dimension that

                // has been shrunk the most.

                if (width / height > defWidth / defHeight && height < defHeight) {

                    ratio = height / defHeight;

                } else if (width / height < defWidth / defHeight && width < defWidth) {

                    ratio = width / defWidth;

                }

                playWidth *= ratio;

                playHeight *= ratio;

                logoWidth *= ratio;

                logoHeight *= ratio;

                playLeft = (width - playWidth) / 2;

                playTop = (height - playHeight) / 2;

                ctx.drawImage(play, playLeft, playTop, playWidth, playHeight);

                ctx.globalAlpha = 0.7

                ctx.drawImage(logo, width - logoWidth, height - logoHeight, logoWidth, logoHeight);

                // To make it slightly easier to hit, the click target is twice the width/height of the unscaled play button

                targetLeft = width / 2 - play.width;

                targetRight = width / 2 + play.width;

                targetTop = height / 2 - play.height;

                targetBottom = height / 2 + play.height;



                canvas.addEventListener("click", function(e) {

                   var posx = e.clientX-canvas.offsetLeft;

                   var posy = e.clientY-canvas.offsetTop;

                   if (posx >= targetLeft && posx <= targetRight &&

                       posy >= targetTop && posy <= targetBottom) {

                       top.location.href = "vnd.youtube:VIDEO_ID";

                   }

               }, false);

            }

        }

        var background = new Image();

        background.onload = doload;

        background.src = "http://img.youtube.com/vi/VIDEO_ID/0.jpg";

        play = new Image();

        play.onload = doload;

        play.src = "play.png";

        logo = new Image();

        logo.onload = doload;

        logo.src = "youtube.png";

    }

    window.onload = setup;

  </script>

    <div id="main">

      <table height="100%" width="100%">

        <tr>

          <td align="center" valign="middle" height="100%">

            <a id="url" href="vnd.youtube:VIDEO_ID" target="_top">

              <img src="play.png" style="border:0px"/>

            </a>

          </td>

        </tr>

        <tr>

          <td valign="bottom" align="right">

            <img src="youtube.png" style="opacity:.7"/>

          </td>

        </tr>

      </table>

    <canvas id="canvas"></canvas>

    </div>

  </body>

</html>