Merge remote branch 'upstream/master'

viewer.js

@@ -0,0 +1,129 @@
+/* -*- Mode: Java; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- /
+/* vim: set shiftwidth=4 tabstop=8 autoindent cindent expandtab: */
+
+var pdfDocument, canvas, pageDisplay, pageNum, pageInterval;
+function load(userInput) {
+    canvas = document.getElementById("canvas");
+    canvas.mozOpaque = true;
+    pageNum = parseInt(queryParams().page) || 1;
+    fileName = userInput;
+    if (!userInput) {
+      fileName = queryParams().file || "compressed.tracemonkey-pldi-09.pdf";
+    }
+    open(fileName);
+}
+
+function queryParams() {
+    var qs = window.location.search.substring(1);
+    var kvs = qs.split("&");
+    var params = { };
+    for (var i = 0; i < kvs.length; ++i) {
+        var kv = kvs[i].split("=");
+        params[unescape(kv[0])] = unescape(kv[1]);
+    }
+    return params;
+}
+
+function open(url) {
+    document.title = url;
+    req = new XMLHttpRequest();
+    req.open("GET", url);
+    req.mozResponseType = req.responseType = "arraybuffer";
+    req.expected = (document.URL.indexOf("file:") == 0) ? 0 : 200;
+    req.onreadystatechange = function() {
+      if (req.readyState == 4 && req.status == req.expected) {
+        var data = req.mozResponseArrayBuffer || req.mozResponse ||
+                   req.responseArrayBuffer || req.response;
+        pdfDocument = new PDFDoc(new Stream(data));
+        numPages = pdfDocument.numPages;
+        document.getElementById("numPages").innerHTML = numPages.toString();
+        goToPage(pageNum);
+      }
+    };
+    req.send(null);
+}
+
+function gotoPage(num) {
+    if (0 <= num && num <= numPages)
+        pageNum = num;
+    displayPage(pageNum);
+}
+
+function displayPage(num) {
+    window.clearInterval(pageInterval);
+
+    document.getElementById("pageNumber").value = num;
+
+    var t0 = Date.now();
+
+    var page = pdfDocument.getPage(pageNum = num);
+
+    var t1 = Date.now();
+    var ctx = canvas.getContext("2d");
+    ctx.save();
+    ctx.fillStyle = "rgb(255, 255, 255)";
+    ctx.fillRect(0, 0, canvas.width, canvas.height);
+    ctx.restore();
+
+    var gfx = new CanvasGraphics(ctx);
+
+    // page.compile will collect all fonts for us, once we have loaded them
+    // we can trigger the actual page rendering with page.display
+    var fonts = [];
+    page.compile(gfx, fonts);
+    var t2 = Date.now();
+
+    var fontsReady = true;
+
+    // Inspect fonts and translate the missing one
+    var count = fonts.length;
+    for (var i = 0; i < count; i++) {
+      var font = fonts[i];
+      if (Fonts[font.name]) {
+        fontsReady = fontsReady && !Fonts[font.name].loading;
+        continue;
+      }
+
+      new Font(font.name, font.file, font.properties);
+      fontsReady = false;
+    }
+
+    function delayLoadFont() {
+      for (var i = 0; i < count; i++) {
+        if (Fonts[font.name].loading)
+          return;
+      }
+      window.clearInterval(pageInterval);
+
+      var t3 = Date.now();
+
+      page.display(gfx);
+
+      var t4 = Date.now();
+
+      var infoDisplay = document.getElementById("info");
+      infoDisplay.innerHTML = "Time to load/compile/fonts/render: "+ (t1 - t0) + "/" + (t2 - t1) + "/" + (t3 - t2) + "/" + (t4 - t3) + " ms";
+    };
+
+    if (fontsReady) {
+      delayLoadFont();
+    } else {
+      pageInterval = setInterval(delayLoadFont, 10);
+    }
+}
+
+function nextPage() {
+    if (pageNum < pdfDocument.numPages)
+      displayPage(++pageNum);
+}
+
+function prevPage() {
+    if (pageNum > 1)
+      displayPage(--pageNum);
+}
+
+function goToPage(num) {
+  if (0 <= num && num <= numPages)
+    displayPage(pageNum = num);
+}
+