sonofdelphi - Developer IT

ContentEditable DIV - disabling drag and drop

- by sonofdelphi

Is it possible to disable the drag-and-drop functionality on elements which have the contentEditable attribute set to true. I have the following HTML page. <!DOCTYPE html> <html><meta charset="utf-8"><head><title>ContentEditable</title></head> <body> <div contenteditable="true">This is…

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Writing UTF8 text to file

- by sonofdelphi

I am using the following function to save text to a file (on IE-8 w/ActiveX). function saveFile(strFullPath, strContent) { var fso = new ActiveXObject( "Scripting.FileSystemObject" ); var flOutput = fso.CreateTextFile( strFullPath, true ); //true for overwrite flOutput.Write( strContent ); flOutput.Close(); } The code works…

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Editing Div Text At Click Position

- by sonofdelphi

I have a DIV which contains some text. When a user clicks on some content in the DIV, I want to enable him to edit the content at that position. <div id='Note'> Lorem ipsum dolor sit amet, consectetur adipisicing elit, <br /> sed do eiusmod tempor incididunt ut labore et dolore magna aliqua. <br /> Ut enim ad minim veniam,…

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Determine which DOM elements the current text selection contains

- by sonofdelphi

I want to be able to find out which DOM elements are present in the text currently selected by the user in the browser. document.getSelection() would get us the currently selected text. But how can we determine which DOM elements are contained in this text selection?

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Disable JavaScript on window.open

- by sonofdelphi

I have a set of (X)HTML files that I need to open with window.open() from an application homepage. I am able to open these files and read the data within them. function openFiles() { var files = document.querySelectorAll('td a'); //The list of files to scan is stored as links in an HTML table for(var i = 0; i<files.length; i++){…

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Accelerator UI in JavaScript

- by sonofdelphi

Can I create something like an Internet Explorer accelerator using JavaScript on the client-side? I want a clickable icon to show up when the user selects some text on the page. What is the event I should wait on?

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jQuery internals: Organization of the jQuery Object

- by sonofdelphi

I was going through the source code of jQuery. I'm having trouble understanding the wrapping strategy for the jQuery object. (function( window, undefined ) { // Define a local copy of jQuery var jQuery = function( selector, context ) { // The jQuery object is actually just the init constructor 'enhanced' …

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Ordering DOM elements

- by sonofdelphi

Given two DOM elements, say a and b, how can we determine which comes first in the document? I'm implementing drag and drop for a set of elements. And the elements can be selected in any order, but when they are dragged, these elements need to be moved in the "correct" order.

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Collect DOM elements from external HTML documents

- by sonofdelphi

I am trying to write a report-generator to collect user-comments from a list of external HTML files. User-comments are wrapped in < span elements. Can this be done using JavaScript? Here's my attempt: function generateCommentReport() { var files = document.querySelectorAll('td a'); //Files to scan are links in an HTML table …

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accessing and modifying tab opened using window.open in google chrome

- by sonofdelphi

I used to be able to this to create an exported HTML page containing some data. But the code is not working with the latest version of Google Chrome (It works alright with Chrome 5.0.307.11 beta and all other major browsers). function createExport(text) { var target = window.open(); target.title = 'Memonaut - Exported View'; …

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Detecting regular expression in content during parse

- by sonofdelphi

I am writing a parser for C. I was just running it with some other language files (for fun, to see the extent C-likeness). It breaks down if the code being parsed contains regular expressions... Case 1: For example, while parsing the JavaScript code snippet, var phone="(304)434-5454" phone=phone.replace(/[-]/g, "") //Returns…

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How do I read long lines from a text file in C++?

- by sonofdelphi

I am using the following code for reading lines from a text-file. What is the best method for handling the case where the line is greater than the limit SIZE_MAX_LINE? void TextFileReader::read(string inFilename) { ifstream xInFile(inFilename.c_str()); if(!xInFile){ return; } char acLine[SIZE_MAX_LINE +…

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C++ map performance - Linux (30 sec) vs Windows (30 mins) !!!

- by sonofdelphi

I need to process a list of files. The processing action should not be repeated for the same file. The code I am using for this is - using namespace std; vector<File*> gInputFileList; //Can contain duplicates, File has member sFilename map<string, File*> gProcessedFileList; //Using map to avoid linear search costs…

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Reading long lines from text file

- by sonofdelphi

I am using the following code for reading lines from a text-file. What is the best method for handling the case where the line is greater than the limit SIZE_MAX_LINE? void TextFileReader::read(string inFilename) { ifstream xInFile(inFilename.c_str()); if(!xInFile){ return; } char acLine[SIZE_MAX_LINE +…

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Determining the order of DOM elements

- by sonofdelphi

Given two DOM elements, say a and b, how can we determine which comes first in the document? I'm implementing drag and drop for a set of elements. And the elements can be selected in any order, but when they are dragged, these elements need to be moved in the "correct" order.

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Undo implementation - DOM manipulations

- by sonofdelphi

Is there a library that can be used for implementing undo/redo functionality for DOM element manipulations in JavaScript? I'm writing an app that moves around DOM elements, enables editing and deletion of those elements. There are event-handlers and other objects associated with each element operated upon. Not sure whether I…

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Read file-contents into a string in C++

- by sonofdelphi

In scripting languages like Perl, it is possible to read a file into a variable in one shot. open(FILEHANDLE,$file); $content=<FILEHANDLE>; What would be the most efficient way to do this in C++?

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Thread-safe get (accessor method)

- by sonofdelphi

I'm currently using the following code for thread-safe access of a variable. int gnVariable; void getVariableValue(int *pnValue) { acquireLock(); //Acquires the protection mechanism *pnValue = gnVariable; releaseLock(); //Releasing the protection mechanism } I would like to change my API signature to a more…

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