I've seen a few posts on extracting images from PDF using iTextSharp, but all are VB/C# based.
A core part of these solutions is something like:
PdfDictionary res = (PdfDictionary)(PdfReader.GetPdfObject(dict.Get(PdfName.RESOURCES)));
PdfDictionary xobj = (PdfDictionary)(PdfReader.GetPdfObject(res.Get(PdfName.XOBJECT)));
if (xobj != null)
{
foreach (PdfName name in xobj.Keys)
I can create the res and xobj objects fine in Jscript, but JScript does not support foreach loops. I have to do something like
for
(var x = 0; x < xobj.Keys.Count; x++)
{
var name = xobj.Keys(x)
...
}
But this is of course invalid.
Can someone explain how I can parse all the keys in xobj, without using foreach loops?
Related
I'm using this simple script to grab text wrapped in [ENDNOTE][/ENDNOTE] tags and make them into actual InDesign endnotes. The problem I'm having is that only the first 4 characters are being placed between the endnote markers (see screenshot below), any idea why this is happening, or how to make it work right?
var doc = app.activeDocument;
function footnoteToEndnotes () {
app.findGrepPreferences = null;
app.findGrepPreferences.findWhat = '\\[ENDNOTE\\](.+?)\\[\\/ENDNOTE\\]';
var endnote,
fnotes = doc.findGrep();
for (var i = fnotes.length-1; i >= 0; i--) {
var taggedText = fnotes[i].contents.replace('[ENDNOTE]', '').replace('[/ENDNOTE]', '');
endnote = fnotes[i].insertionPoints[0].createEndnote();
endnote.texts[0].contents = taggedText;
fnotes[i].remove();
}
}
if (parseInt (app.version) < 13) {
alert ('This script requires InDesign CC2018 or later');
exit();
}
doc.endnoteOptions.frameCreateOption = EndnoteFrameCreate.NEW_PAGE;
footnoteToEndnotes();
So, when I set the content of insertionPoints[0], the full endnote ended up inside the endnote markers. But, there was an extraneous tab character at the end of the string... I stripped it out and it's working like I want!
I replaced this line:
endnote.texts[0].contents = taggedText;
With these:
endnote.texts[0].insertionPoints[0].contents = taggedText;
endnote.texts[0].contents = endnote.texts[0].contents.replace('\t', '');
I need to transfer ownership of thousands of files I own to someone else with editing access, but I've learned that Google Drive requires you to do this one file at a time. With intermediate but growing JS experience I decided to write a script to change the owner from a list of file IDs in a spreadsheet, however I've run into trouble and I have no idea why. The debugger just runs through the script and everything looks sound for me. I'd greatly appreciate any help.
function changeOwner() {
var ss = SpreadsheetApp.openByUrl('https://docs.google.com/spreadsheets/d/********/').getSheetByName('Sheet1');
var range = ss.getRange(1,1,2211);
for (i = 0; i < range.length; i++){
var file = range[i][0].getValue();
var fileid = DriveApp.getFileById(file);
fileid.setOwner('******#gmail.com');
}
}
Tested below code working fine with IDs,
function myFunction() {
var spreadsheet = SpreadsheetApp.openById('ID');
var range = spreadsheet.getDataRange().getValues();
for (i = 0; i < range.length; i++){
var file = range[i][0].toString();
var fileid = DriveApp.getFileById(file);
fileid.setOwner('***#gmail.com');
}
}
Your issue is that the Range class had no length property. Instead, perform a getValues() call on the range to efficiently create a JavaScript array, and iterate on it:
function changeOwner() {
var ss = SpreadsheetApp.openByUrl('https://docs.google.com/spreadsheets/d/********/').getSheetByName('Sheet1');
var values = ss.getRange(1, 1, 2211).getValues();
for (i = 0; i < values.length; ++i){
var fileid = value[i][0];
var file = DriveApp.getFileById(fileid);
file.setOwner('******#gmail.com');
}
}
There are other improvements you can make, such as:
dynamic range read (rather than the fixed assumption of 2211 rows of data)
writing to a second array to keep track of which files you have yet to process
checks for if the file exists
checks for if the file is actually owned by you
checks for execution time remaining, to allow serializing any updates/tracking you do that prevents the next execution from repeating what you just did
and so on. I'll let you research those topics, and the methods available in Apps Script documentation for the DriveApp, SpreadsheetApp, Sheet, and Range classes. Note that you also have all features of Javascript 1.6 available, so many of the things you find on a Javascript Developer Reference (like MDN) are also available to you.
I'm developing a PowerPoint add-in with the feature to upload a presentation to the web server. I have a presentation with 100MB exact size. I used the guidelines for using GetFileAsync in Office docs. It is working for small presentation files. But the add-in message of not responding when I select largely presentation file. I did break point to the code and I found out that the cause of not responding is in js due to the large array slices. There is no problem with getting the slices of a large file. But the problem in when slices array concat to be one array.
Here's the code came from Office docs where the issue occurred.
function onGotAllSlices(docdataSlices) {
var docdata = [];
for (var i = 0; i < docdataSlices.length; i++) {
docdata = docdata.concat(docdataSlices[i]);
}
var fileContent = new String();
for (var j = 0; j < docdata.length; j++) {
fileContent += String.fromCharCode(docdata[j]);
}
// Now all the file content is stored in 'fileContent' variable,
// you can do something with it, such as print, fax...
}
I don't know if it is a bug or issue on the part of Office Add-in. I hope someone helps me.
Thanks in advance.
UPDATES:
I simplify the given function like this:
function onGotAllSlices(docdataSlices) {
var fileContent = new String();
for(var i = 0; i < docdataSlices.length; i++) {
var docdata = docdataSlides[i];
for(var j = 0; j < docdata.length; j++) {
fileContent += String.fromCharCode(docdata[j]);
}
}
var base64String = window.btoa(fileContent);
}
So far, there is no 'out of memory' issue at all. But there is another issue with error message of '8007000e. “Not enough storage is available to complete this operation”' when the fileContent convert in base64String.
This looks like it's a performance problem. Have you checked How to extend an existing JavaScript array with another array, without creating a new array? ? .concat will create a new array from the previous two ones, which you're re-assigning. Perhaps there's a better way of doing this?
I'm trying to create skype tool and I'm trying to make a command for it what would give the user a random imgur link, I tried first to just random generate string like so:
var chars ="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
var stringChars = new char[8];
var random = new Random();
for (int i = 0; i < stringChars.Length; i++)
{
stringChars[i] = chars[random.Next(chars.Length)];
}
var finalString = new String(stringChars);
string imgur = "http://imgur.com/" + finalString;
But of course it just gave me random imgur links which don't work, how could I check if the link is valid and then give it to the user or how could I use imgurs own "https://imgur.com/gallery/random" and return the link from that?
Imgur API exposes a function to fetch a random set of gallery images:
https://api.imgur.com/endpoints/gallery#gallery-random
Method GET
Route https://api.imgur.com/3/gallery/random/random/{page}
How can I get text in p tag behind from body tag with using Linq with HtmlAgilitypack?
Iam not sure that people say htmlagility doesn't support xpath.
I will parse html codes.
Simplest way to use HtmlAgility ->
HtmlAgilityPack.HtmlDocument doc = new HtmlAgilityPack.HtmlDocument();
doc.LoadHtml(string); //string contains the html code
var paragraphTags = doc.DocumentNode.SelectNodes("p"); //selects all p tags
for (int i = 0; i < paragraphTags.Count; i++) //loop through the p tags
{
String text = paragraphTags[i].InnerHtml;
//text has your paragraph content. use it here.
}