[Pkg-javascript-commits] [pdf.js] 196/246: Added svg export tool

[David Prévot]

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taffit pushed a commit to branch master
in repository pdf.js.

commit 0e5998a325a16dc6f88ad10b8ab5a9c74df5301c
Author: pramodhkp <prmdh1 at gmail.com>
Date:   Thu Aug 14 01:34:47 2014 +0530

    Added svg export tool
---
 .gitignore                |   1 +
 examples/node/domstubs.js | 140 ++++++++++++++++++++++++++++++++++++++++++++++
 examples/node/pdf2svg.js  |  85 ++++++++++++++++++++++++++++
 3 files changed, 226 insertions(+)

diff --git a/.gitignore b/.gitignore
index 516970e..421e6f4 100644
--- a/.gitignore
+++ b/.gitignore
@@ -5,3 +5,4 @@ tags
 .DS_Store
 Makefile
 node_modules/
+examples/node/svgdump/
diff --git a/examples/node/domstubs.js b/examples/node/domstubs.js
new file mode 100644
index 0000000..dafc758
--- /dev/null
+++ b/examples/node/domstubs.js
@@ -0,0 +1,140 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+var sheet = {
+  cssRules: [],
+  insertRule: function(rule) {
+    this.cssRules.push(rule);
+  },
+};
+
+var style = {
+  sheet: sheet,
+};
+
+function xmlEncode(s){
+  var i = 0, ch;
+  while (i < s.length && (ch = s[i]) !== '&' && ch !== '<' &&
+         ch !== '\"' && ch !== '\n' && ch !== '\r' && ch !== '\t') {
+    i++;
+  }
+  if (i >= s.length) {
+    return s;
+  }
+  var buf = s.substring(0, i);
+  while (i < s.length) {
+    ch = s[i++];
+    switch (ch) {
+      case '&':
+        buf += '&';
+        break;
+      case '<':
+        buf += '<';
+        break;
+      case '\"':
+        buf += '"';
+        break;
+      case '\n':
+        buf += '&#xA;';
+        break;
+      case '\r':
+        buf += '&#xD;';
+        break;
+      case '\t':
+        buf += '&#x9;';
+        break;
+      default:
+        buf += ch;
+        break;
+    }
+  }
+  return buf;
+}
+
+global.btoa = function btoa(chars) {
+  var digits =
+  'ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=';
+  var buffer = '';
+    var i, n;
+    for (i = 0, n = chars.length; i < n; i += 3) {
+      var b1 = chars.charCodeAt(i) & 0xFF;
+      var b2 = chars.charCodeAt(i + 1) & 0xFF;
+      var b3 = chars.charCodeAt(i + 2) & 0xFF;
+      var d1 = b1 >> 2, d2 = ((b1 & 3) << 4) | (b2 >> 4);
+      var d3 = i + 1 < n ? ((b2 & 0xF) << 2) | (b3 >> 6) : 64;
+      var d4 = i + 2 < n ? (b3 & 0x3F) : 64;
+      buffer += (digits.charAt(d1) + digits.charAt(d2) +
+      digits.charAt(d3) + digits.charAt(d4));
+    }
+  return buffer;
+};
+
+function DOMElement(name) {
+  this.nodeName = name;
+  this.childNodes = [];
+  this.attributes = {};
+  this.textContent = '';
+}
+
+DOMElement.prototype = {
+
+  setAttributeNS: function DOMElement_setAttributeNS(NS, name, value) {
+    value = value || '';
+    value = xmlEncode(value);
+    this.attributes[name] = value;
+  },
+
+  appendChild: function DOMElement_appendChild(element) {
+    var childNodes = this.childNodes;
+    if (childNodes.indexOf(element) === -1) {
+      childNodes.push(element);
+    }
+  },
+
+  toString: function DOMElement_toString() {
+    var attrList = [];
+    for (i in this.attributes) {
+      attrList.push(i + '="' + xmlEncode(this.attributes[i]) + '"');
+    }
+
+    if (this.nodeName === 'svg:tspan') {
+      var encText = xmlEncode(this.textContent);
+      return '<' + this.nodeName + ' ' + attrList.join(' ') + '>' +
+             encText + '</' + this.nodeName + '>';
+    } else if (this.nodeName === 'svg:svg') {
+      var ns = 'xmlns:xlink="http://www.w3.org/1999/xlink" ' +
+               'xmlns:svg="http://www.w3.org/2000/svg"'
+      return '<' + this.nodeName + ' ' + ns + ' ' + attrList.join(' ') + '>' +
+             this.childNodes.join('') + '</' + this.nodeName + '>';
+    } else {
+      return '<' + this.nodeName + ' ' + attrList.join(' ') + '>' +
+             this.childNodes.join('') + '</' + this.nodeName + '>';
+    }
+  },
+
+  cloneNode: function DOMElement_cloneNode() {
+    var newNode = new DOMElement(this.nodeName);
+    newNode.childNodes = this.childNodes;
+    newNode.attributes = this.attributes;
+    newNode.textContent = this.textContent;
+    return newNode;
+  },
+}
+  
+global.document = {
+  childNodes : [],
+
+  getElementById: function (id) {
+    if (id === 'PDFJS_FONT_STYLE_TAG') {
+      return style;
+    }
+  },
+
+  createElementNS: function (NS, element) {
+    var elObject = new DOMElement(element);
+    return elObject;
+  },
+};
+
diff --git a/examples/node/pdf2svg.js b/examples/node/pdf2svg.js
new file mode 100644
index 0000000..6da69b1
--- /dev/null
+++ b/examples/node/pdf2svg.js
@@ -0,0 +1,85 @@
+/* -*- Mode: Java; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set shiftwidth=2 tabstop=2 autoindent cindent expandtab: */
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+//
+// Node tool to dump SVG output into a file.
+//
+
+var fs = require('fs');
+
+// HACK few hacks to let PDF.js be loaded not as a module in global space.
+global.window = global;
+global.navigator = { userAgent: 'node' };
+global.PDFJS = {};
+
+PDFJS.workerSrc = true;
+require('../../build/singlefile/build/pdf.combined.js');
+require('./domstubs.js');
+
+// Loading file from file system into typed array
+var pdfPath = process.argv[2] || '../../web/compressed.tracemonkey-pldi-09.pdf';
+var data = new Uint8Array(fs.readFileSync(pdfPath));
+
+// Dumps svg outputs to a folder called svgdump
+function writeToFile(svgdump, pageNum) {
+  var name = getFileNameFromPath(pdfPath);
+  fs.mkdir('./svgdump/', function(err) {
+    if (!err || err.code === 'EEXIST') {
+      fs.writeFile('./svgdump/' + name + "-" + pageNum + '.svg', svgdump,
+        function(err) {
+          if (err) {
+            console.log('Error: ' + err);
+          } else {
+            console.log('Page: ' + pageNum);
+          }
+        });
+    }
+  });
+}
+
+// Get filename from the path
+
+function getFileNameFromPath(path) {
+  var index = path.lastIndexOf('/');
+  var extIndex = path.lastIndexOf('.');
+  return path.substring(index , extIndex);
+}
+
+// Will be using promises to load document, pages and misc data instead of
+// callback.
+PDFJS.getDocument(data).then(function (doc) {
+  var numPages = doc.numPages;
+  console.log('# Document Loaded');
+  console.log('Number of Pages: ' + numPages);
+  console.log();
+
+  var lastPromise = Promise.resolve(); // will be used to chain promises
+  var loadPage = function (pageNum) {
+    return doc.getPage(pageNum).then(function (page) {
+      console.log('# Page ' + pageNum);
+      var viewport = page.getViewport(1.0 /* scale */);
+      console.log('Size: ' + viewport.width + 'x' + viewport.height);
+      console.log();
+      
+      return page.getOperatorList().then(function (opList) {
+        var svgGfx = new PDFJS.SVGGraphics(page.commonObjs, page.objs);
+        return svgGfx.loadDependencies(opList).then(function (values) {
+          var svgDump = svgGfx.getSVG(viewport, pageNum, opList).toString();
+          writeToFile(svgDump, pageNum);
+        });
+      });
+    })
+  };
+  
+  for (var i = 1; i <= numPages; i++) {
+    lastPromise = lastPromise.then(loadPage.bind(null, i));
+  }
+  return lastPromise;
+}).then(function () {
+  console.log('# End of Document');
+}, function (err) {
+  console.error('Error: ' + err);
+});
+

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