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Replace CharacterData content with some HTML

First Time I am asking something here I hope I will be precise enough.
I am trying to make a simple extension for chrome that highlight the selected text when I press "H" on my keyboard, but I have some issue :
Use Case
The user select with his mouse a piece of text.
The user press H on his keyboard
Bibbidi-Bobbidi-Boo the selected text is highlighted.
Code so far
To detect when user press H and to get the piece of text he selected :
window.addEventListener('keydown', e => {
if(e.code == "KeyH")
{
var selected = window.getSelection()
//SimpleHighLight(selected);
ComplexHighLight(selected);
}
});
I have coded coded a simple way to do what I want like this :
function SimpleHighLight(selected){
var selectedText = selected.toString();
if(selectedText.length != 0)
{
var range = selected.getRangeAt(0);
var element = selected.anchorNode.parentNode;
var highlited = "<span style='background: rgb(255,255,0)'>" + selectedText + "</span>";
var reg = new RegExp(selectedText,"g");
var text = element.innerHTML.replace(reg, highlited);
element.innerHTML = text;
}
}
It work fine for piece of text in an unique DOM element and when there is no other occurrence of the selected text but I want it to always work, like in a case of my selected text comes from 2 different paragraphs.
So I did this :
function ComplexHighLight(selected){
var selectedText = selected.toString();
if(selectedText.length != 0)
{
console.log(" Selection : " + selectedText);
var range = selected.getRangeAt(0);
if(!range.collapsed)
{
var startNode = range.startContainer;
var startOffset = range.startOffset;
var endNode = range.endContainer;
var endOffset = range.endOffset;
if(startNode == endNode) //Means that its in the same node element
{
var highlited = "<span style='background: rgb(255,255,0)'>" + selectedText + "</span>";
startNode.replaceData(startOffset, endOffset-startOffset, highlited);
startNode.parentNode.innerHTML = startNode.nodeValue;
}
}
}
}
That's only a part of the problem where I handle when a piece of text is in the same element (I am already too much in trouble to handle when the selected text comes from multiples elements :( ).
Issue
On paper, it should work, but the main issue is that when I do :
startNode.parentNode.innerHTML = startNode.nodeValue;
the <span> division is given to innerHTML as a string and not some HTML stuff.
I have worked around this for about the whole evening but I can't fix it, does anyone have an idea of how I should do that ?

Get JavaScript Object

I am working client side on a web page that I am unable to edit.
I want to use JS to click on a particular button, but it does not have a unique identifier.
I do know the class and I do know a (unique) string in the innerHTML that I can match with, so I am iterating through the (varying number) of buttons with a while loop looking for the string:
var theResult = '';
var buttonNum = 0;
var searchString = '720p';
while (theResult.indexOf(searchString) == -1
{
theResult = eval(\"document.getElementsByClassName('streamButton')[\" + buttonNum + \"].innerHTML\");
buttonNum++;
}
Now I should know the correct position in the array of buttons (buttonNum-1, I think), but how do I reference this? I have tried:
eval(\"document.getElementsByClassName('streamButton')[\" + buttonNum-1 + \"].click()")
and variation on the position of ()'s in the eval, but I can't get it to work.

You could try something like:
var searchStr = '720p',
// Grab all buttons that have the class 'streambutton'.
buttons = Array.prototype.slice.call(document.querySelectorAll('button.streamButton')),
// Filter all the buttons and select the first one that has the sreachStr in its innerHTML.
buttonToClick = buttons.filter(function( button ) {
return button.innerHTML.indexOf(searchStr) !== -1;
})[0];

You don't need the eval, but you can check all the buttons one by one and just click the button immediately when you find it so you don't have to find it again.
It is not as elegant as what #Shilly suggested, but probably more easily understood if you are new to javascript.
var searchString = '720p';
var buttons = document.getElementsByClassName("streamButton"); // find all streamButtons
if(buttons)
{
// Search all streamButtons until you find the right one
for(var i = 0; i < buttons.length; i++)
{
var button = buttons[i];
var buttonInnerHtml = button.innerHTML;
if (buttonInnerHtml.indexOf(searchString) != -1) {
button.click();
break;
}
}
}
function allOtherClick() {
console.log("Wrong button clicked");
}
function correctButtonClick() {
console.log("Right button clicked");
}
<button class='streamButton' onclick='allOtherClick()'>10</button>
<button class='streamButton' onclick='allOtherClick()'>30</button>
<button class='streamButton' onclick='correctButtonClick()'>720p</button>
<button class='streamButton' onclick='allOtherClick()'>abcd</button>

I would stay clear of eval here, what if the text on the button is some malicious javaScript?
Can you use jQuery? if so, check out contains. You can use it like so:
$(".streamButton:contains('720p')")

How to change only the *selected* text to uppercase, not the entire paragraph in which the selection exists

In Google docs, this function changes the selected text to black
function selectedFontColorBlack() {
// DocumentApp.getUi().alert('selectedFontColorBlack');
var sel = DocumentApp.getActiveDocument().getSelection();
var elements = sel.getRangeElements();
for (var i = 0; i < elements.length; i++) {
var element = elements[i];
// Only modify elements that can be edited as text; skip images and other non-text elements.
if(element.getElement().editAsText) {
var text = element.getElement().editAsText();
// Bold the selected part of the element, or the full element if it's completely selected.
if (element.isPartial()) {
text.setForegroundColor(element.getStartOffset(), element.getEndOffsetInclusive(), "#000000");
} else {
text.setForegroundColor("#000000");
}
}
}
}
This function changes the entire paragraph in which the cursor (or selection) exists to uppercase:
function uppercaseSelected() {
// DocumentApp.getUi().alert('uppercaseSelected');
var sel = DocumentApp.getActiveDocument().getSelection();
var elements = sel.getRangeElements();
for (var i = 0; i < elements.length; i++) {
var element = elements[i];
// Only modify elements that can be edited as text; skip images and other non-text elements.
if(element.getElement().editAsText) {
var text = element.getElement().editAsText();
text.setText(text.getText().toUpperCase());
}
}
}
I don't see any corresponding setText function that works on the selection's "offset", as does the setForegroundColor(Integer,Integer,String). (Both of these functions are in class Text.)
How can I change the actually selected text to uppercase, and not the entire paragraph in which the selection exists?
Thank you.

Try using the setAttributes(startOffset, endOffsetInclusive, attributes) method. Check out the documentation
[EDIT: my bad, i don't think that'll do it. I'll look a bit longer tho]
The gem hidden in the post that #Mogsdad is referring to is this: var selectedText = elementText.substring(startOffset,endOffset+1);. to be little more verbose on how this is used: you can use the string method substring on objects such as DocumentApp.getActiveDocument().getSelection().getSelectedElements()[i].getElement().editAsText().getText()
so, essentially, grab that substring, convert it to uppercase, delete the text in the range (selectedElement.getstartOffset,selectedElement.endOffsetInclusive) and insert the bolded text at selectedElement.getstartOffset
Tada! check it out:
function uppercaseSelected() {
// Try to get the current selection in the document. If this fails (e.g.,
// because nothing is selected), show an alert and exit the function.
var selection = DocumentApp.getActiveDocument().getSelection();
if (!selection) {
DocumentApp.getUi().alert('Cannot find a selection in the document.');
return;
}
var selectedElements = selection.getSelectedElements();
for (var i = 0; i < selectedElements.length; ++i) {
var selectedElement = selectedElements[i];
// Only modify elements that can be edited as text; skip images and other
// non-text elements.
var text = selectedElement.getElement().editAsText();
// Change the background color of the selected part of the element, or the
// full element if it's completely selected.
if (selectedElement.isPartial()) {
var bitoftext = text.getText().substring(selectedElement.getStartOffset(), selectedElement.getEndOffsetInclusive() + 1);
text.deleteText(selectedElement.getStartOffset(), selectedElement.getEndOffsetInclusive());
text.insertText(selectedElement.getStartOffset(), bitoftext.toUpperCase());
} else {
text.setText(text.getText().toUpperCase());
}
}
}

Started with the code from Google App script Document App get selected lines or words?, and made this almost a year ago. I'm happy if it helps you.
The "trick" is that you need to delete the original text and insert the converted text.
This script produces a menu with options for UPPER, lower and Title Case. Because of the delete / insert, handling more than one paragraph needs special attention. I've left that to you!
function onOpen() {
DocumentApp.getUi().createMenu('Change Case')
.addItem("UPPER CASE", 'toUpperCase' )
.addItem("lower case", 'toLowerCase' )
.addItem("Title Case", 'toTitleCase' )
.addToUi();
}
function toUpperCase() {
_changeCase(_toUpperCase);
}
function toLowerCase() {
_changeCase(_toLowerCase);
}
function toTitleCase() {
_changeCase(_toTitleCase);
}
function _changeCase(newCase) {
var doc = DocumentApp.getActiveDocument();
var selection = doc.getSelection();
var ui = DocumentApp.getUi();
var report = ""; // Assume success
if (!selection) {
report = "Select text to be modified.";
}
else {
var elements = selection.getSelectedElements();
if (elements.length > 1) {
report = "Select text in one paragraph only.";
}
else {
var element = elements[0].getElement();
var startOffset = elements[0].getStartOffset(); // -1 if whole element
var endOffset = elements[0].getEndOffsetInclusive(); // -1 if whole element
var elementText = element.asText().getText(); // All text from element
// Is only part of the element selected?
if (elements[0].isPartial())
var selectedText = elementText.substring(startOffset,endOffset+1);
else
selectedText = elementText;
// Google Doc UI "word selection" (double click)
// selects trailing spaces - trim them
selectedText = selectedText.trim();
endOffset = startOffset + selectedText.length - 1;
// Convert case of selected text.
var convertedText = newCase(selectedText);
element.deleteText(startOffset, endOffset);
element.insertText(startOffset, convertedText);
}
}
if (report !== '') ui.alert( report );
}
function _toUpperCase(str) {
return str.toUpperCase();
}
function _toLowerCase(str) {
return str.toLowerCase();
}
// https://stackoverflow.com/a/196991/1677912
function _toTitleCase(str)
{
return str.replace(/\w\S*/g, function(txt){return txt.charAt(0).toUpperCase() + txt.substr(1).toLowerCase();});
}

how to highlight all the occurrence of a particular string in a div with java script?

i need to highlight all the occurrences of a string in particular div by selecting a string,
once i select a word and click a button it need to highlight all its occurrence inside a div,
eg - if i select
cricket is game
it should highlight all the occurrences of cricket is game some may be like this cricket is game or cricket is game

You can get the browser to do the hard work for you using a TextRange in IE and window.find() in other browsers.
This answer shows how to do it. It will match text that crosses element boundaries and does the highlighting for you using document.execCommand().
Alternatively, James Padolsey recently published a script that I haven't used but looks like it could help: http://james.padolsey.com/javascript/replacing-text-in-the-dom-solved/

mark.js seems pretty good for this. Here's my 3 line fiddle to take an html 'string' and highlight the search string.
$(document).ready(function() {
var html_string = "<b>Major Tom to groundcontrol.</b> Earth is blue <span> and there's something </span> i can do";
var with_highlight = $("<div/>").html(html_string).mark("can");
$("#msg").html(with_highlight);
})
Link to jsfiddle

You can tryout this script Demo
in highlightSearchTerms function of this script var bodyText = document.body.innerHTML; get replace by your divid and than it will do the task for you..
/*
* This is the function that actually highlights a text string by
* adding HTML tags before and after all occurrences of the search
* term. You can pass your own tags if you'd like, or if the
* highlightStartTag or highlightEndTag parameters are omitted or
* are empty strings then the default <font> tags will be used.
*/
function doHighlight(bodyText, searchTerm, highlightStartTag, highlightEndTag)
{
// the highlightStartTag and highlightEndTag parameters are optional
if ((!highlightStartTag) || (!highlightEndTag)) {
highlightStartTag = "<font style='color:blue; background-color:yellow;'>";
highlightEndTag = "</font>";
}
// find all occurences of the search term in the given text,
// and add some "highlight" tags to them (we're not using a
// regular expression search, because we want to filter out
// matches that occur within HTML tags and script blocks, so
// we have to do a little extra validation)
var newText = "";
var i = -1;
var lcSearchTerm = searchTerm.toLowerCase();
var lcBodyText = bodyText.toLowerCase();
while (bodyText.length > 0) {
i = lcBodyText.indexOf(lcSearchTerm, i+1);
if (i < 0) {
newText += bodyText;
bodyText = "";
} else {
// skip anything inside an HTML tag
if (bodyText.lastIndexOf(">", i) >= bodyText.lastIndexOf("<", i)) {
// skip anything inside a <script> block
if (lcBodyText.lastIndexOf("/script>", i) >= lcBodyText.lastIndexOf("<script", i)) {
newText += bodyText.substring(0, i) + highlightStartTag + bodyText.substr(i, searchTerm.length) + highlightEndTag;
bodyText = bodyText.substr(i + searchTerm.length);
lcBodyText = bodyText.toLowerCase();
i = -1;
}
}
}
}
return newText;
}
/*
* This is sort of a wrapper function to the doHighlight function.
* It takes the searchText that you pass, optionally splits it into
* separate words, and transforms the text on the current web page.
* Only the "searchText" parameter is required; all other parameters
* are optional and can be omitted.
*/
function highlightSearchTerms(searchText, treatAsPhrase, warnOnFailure, highlightStartTag, highlightEndTag)
{
// if the treatAsPhrase parameter is true, then we should search for
// the entire phrase that was entered; otherwise, we will split the
// search string so that each word is searched for and highlighted
// individually
if (treatAsPhrase) {
searchArray = [searchText];
} else {
searchArray = searchText.split(" ");
}
if (!document.body || typeof(document.body.innerHTML) == "undefined") {
if (warnOnFailure) {
alert("Sorry, for some reason the text of this page is unavailable. Searching will not work.");
}
return false;
}
var bodyText = document.body.innerHTML;
for (var i = 0; i < searchArray.length; i++) {
bodyText = doHighlight(bodyText, searchArray[i], highlightStartTag, highlightEndTag);
}
document.body.innerHTML = bodyText;
return true;
}
/*
* This displays a dialog box that allows a user to enter their own
* search terms to highlight on the page, and then passes the search
* text or phrase to the highlightSearchTerms function. All parameters
* are optional.
*/
function searchPrompt(defaultText, treatAsPhrase, textColor, bgColor)
{
// This function prompts the user for any words that should
// be highlighted on this web page
if (!defaultText) {
defaultText = "";
}
// we can optionally use our own highlight tag values
if ((!textColor) || (!bgColor)) {
highlightStartTag = "";
highlightEndTag = "";
} else {
highlightStartTag = "<font style='color:" + textColor + "; background-color:" + bgColor + ";'>";
highlightEndTag = "</font>";
}
if (treatAsPhrase) {
promptText = "Please enter the phrase you'd like to search for:";
} else {
promptText = "Please enter the words you'd like to search for, separated by spaces:";
}
searchText = prompt(promptText, defaultText);
if (!searchText) {
alert("No search terms were entered. Exiting function.");
return false;
}
return highlightSearchTerms(searchText, treatAsPhrase, true, highlightStartTag, highlightEndTag);
}

This should get you started: http://jsfiddle.net/wDN5M/
function getSelText() {
var txt = '';
if (window.getSelection) {
txt = window.getSelection();
} else if (document.getSelection) {
txt = document.getSelection();
} else if (document.selection) {
txt = document.selection.createRange().text;
}
document.getElementById('mydiv').innerHTML = document.getElementById('mydiv').innerHTML.split(txt).join('<span class="highlight">' + txt + '</span>');
}
See: Get selected text on the page (not in a textarea) with jQuery
If you want it to work across element boundaries your code will need to be more involved than this. jQuery will make your life easier when doing the necessary DOM traversal and manipulation.

I would use jQuery to iterate over all Elements in your div (Don't know if you have other elements in the div) and then a Regular Expression and do a greedy match to find all occurrences of the selected string in your text(s) in the elements.

First you need to find needed substrings in needed text and wrap them with <span class="search-highlight">. Every time you need to highlight another strings, you just get all the .search-highlight spans and turn their outerHtml into innerHtml.
So the code will be close to:
function highLight(substring, block) {
$(block).find(".search-highlight").each(function () {
$(this).outerHtml($(this).html());
});
// now the block is free from previous highlights
$(block).html($(block).html().replace(/substring/g, '<span class="search-highlight">' + substring + '</span>'));
}

<form id=f1 name="f1" action=""
onSubmit="if(this.t1.value!=null && this.t1.value!='')
findString(this.t1.value);return false"
>
<input type="text" id=t1 name=t1size=20>
<input type="submit" name=b1 value="Find">
</form>
<script>
var TRange=null;
function findString (str) {
if (parseInt(navigator.appVersion)<4) return;
var strFound;
if (window.find) {
// CODE FOR BROWSERS THAT SUPPORT window.find
strFound=self.find(str);
if (!strFound) {
strFound=self.find(str,0,1);
while (self.find(str,0,1)) continue;
}
}
else if (navigator.appName.indexOf("Microsoft")!=-1) {
// EXPLORER-SPECIFIC CODE
if (TRange!=null) {
TRange.collapse(false);
strFound=TRange.findText(str);
if (strFound) TRange.select();
}
if (TRange==null || strFound==0) {
TRange=self.document.body.createTextRange();
strFound=TRange.findText(str);
if (strFound) TRange.select();
}
}
else if (navigator.appName=="Opera") {
alert ("Opera browsers not supported, sorry...")
return;
}
if (!strFound) alert ("String '"+str+"' not found!")
return;
}
</script>

Much better to use rather JavaScript str.replace() function then window.find() to find all occurrences of a filter value. Iterating through the whole page might be bit complicated but if you want to search within a parent div, or within a table str.replace() is just simpler.
In your example you have only one DIV, that is even simpler. Here is what I would do (having your DIV an ID: myDIV):
//Searching for "District Court"
var filter = "District Court";
//Here we create the highlight with html tag: <mark> around filter
var span = '<mark>' + filter + '</mark>';
//take the content of the DIV you want to highlight
var searchInthisDiv = document.getElementById("MyDiv");
var textInDiv = searchInthisDiv.innerHTML;
//needed this var for replace function, do the replace (the highlighting)
var highlighted = textInDiv.replace(filter,span);
textInDiv.innerHTML = highlighted;
The trick is to replace the search string with a span that is having the filter within a tag.
str.replace replaces all occurrences of the search string, so no need to bother with looping. Loop can be used to loop through DIVs or other DOM elements.

Clean Microsoft Word Pasted Text using JavaScript

I am using a 'contenteditable' <div/> and enabling PASTE.
It is amazing the amount of markup code that gets pasted in from a clipboard copy from Microsoft Word. I am battling this, and have gotten about 1/2 way there using Prototypes' stripTags() function (which unfortunately does not seem to enable me to keep some tags).
However, even after that, I wind up with a mind-blowing amount of unneeded markup code.
So my question is, is there some function (using JavaScript), or approach I can use that will clean up the majority of this unneeded markup?

Here is the function I wound up writing that does the job fairly well (as far as I can tell anyway).
I am certainly open for improvement suggestions if anyone has any. Thanks.
function cleanWordPaste( in_word_text ) {
var tmp = document.createElement("DIV");
tmp.innerHTML = in_word_text;
var newString = tmp.textContent||tmp.innerText;
// this next piece converts line breaks into break tags
// and removes the seemingly endless crap code
newString = newString.replace(/\n\n/g, "<br />").replace(/.*<!--.*-->/g,"");
// this next piece removes any break tags (up to 10) at beginning
for ( i=0; i<10; i++ ) {
if ( newString.substr(0,6)=="<br />" ) {
newString = newString.replace("<br />", "");
}
}
return newString;
}
Hope this is helpful to some of you.

You can either use the full CKEditor which cleans on paste, or look at the source.

I am using this:
$(body_doc).find('body').bind('paste',function(e){
var rte = $(this);
_activeRTEData = $(rte).html();
beginLen = $.trim($(rte).html()).length;
setTimeout(function(){
var text = $(rte).html();
var newLen = $.trim(text).length;
//identify the first char that changed to determine caret location
caret = 0;
for(i=0;i < newLen; i++){
if(_activeRTEData[i] != text[i]){
caret = i-1;
break;
}
}
var origText = text.slice(0,caret);
var newText = text.slice(caret, newLen - beginLen + caret + 4);
var tailText = text.slice(newLen - beginLen + caret + 4, newLen);
var newText = newText.replace(/(.*(?:endif-->))|([ ]?<[^>]*>[ ]?)|( )|([^}]*})/g,'');
newText = newText.replace(/[·]/g,'');
$(rte).html(origText + newText + tailText);
$(rte).contents().last().focus();
},100);
});
body_doc is the editable iframe, if you are using an editable div you could drop out the .find('body') part. Basically it detects a paste event, checks the location cleans the new text and then places the cleaned text back where it was pasted. (Sounds confusing... but it's not really as bad as it sounds.
The setTimeout is needed because you can't grab the text until it is actually pasted into the element, paste events fire as soon as the paste begins.

How about having a "paste as plain text" button which displays a <textarea>, allowing the user to paste the text in there? that way, all tags will be stripped for you. That's what I do with my CMS; I gave up trying to clean up Word's mess.

You can do it with regex
Remove head tag
Remove script tags
Remove styles tag
let clipboardData = event.clipboardData || window.clipboardData;
let pastedText = clipboardData.getData('text/html');
pastedText = pastedText.replace(/\<head[^>]*\>([^]*)\<\/head/g, '');
pastedText = pastedText.replace(/\<script[^>]*\>([^]*)\<\/script/g, '');
pastedText = pastedText.replace(/\<style[^>]*\>([^]*)\<\/style/g, '');
// pastedText = pastedText.replace(/<(?!(\/\s*)?(b|i|u)[>,\s])([^>])*>/g, '');
here the sample : https://stackblitz.com/edit/angular-u9vprc

I did something like that long ago, where i totally cleaned up the stuff in a rich text editor and converted font tags to styles, brs to p's, etc, to keep it consistant between browsers and prevent certain ugly things from getting in via paste. I took my recursive function and ripped out most of it except for the core logic, this might be a good starting point ("result" is an object that accumulates the result, which probably takes a second pass to convert to a string), if that is what you need:
var cleanDom = function(result, n) {
var nn = n.nodeName;
if(nn=="#text") {
var text = n.nodeValue;
}
else {
if(nn=="A" && n.href)
...;
else if(nn=="IMG" & n.src) {
....
}
else if(nn=="DIV") {
if(n.className=="indent")
...
}
else if(nn=="FONT") {
}
else if(nn=="BR") {
}
if(!UNSUPPORTED_ELEMENTS[nn]) {
if(n.childNodes.length > 0)
for(var i=0; i<n.childNodes.length; i++)
cleanDom(result, n.childNodes[i]);
}
}
}

This works great to remove any comments from HTML text, including those from Word:
function CleanWordPastedHTML(sTextHTML) {
var sStartComment = "<!--", sEndComment = "-->";
while (true) {
var iStart = sTextHTML.indexOf(sStartComment);
if (iStart == -1) break;
var iEnd = sTextHTML.indexOf(sEndComment, iStart);
if (iEnd == -1) break;
sTextHTML = sTextHTML.substring(0, iStart) + sTextHTML.substring(iEnd + sEndComment.length);
}
return sTextHTML;
}

Had a similar issue with line-breaks being counted as characters and I had to remove them.
$(document).ready(function(){
$(".section-overview textarea").bind({
paste : function(){
setTimeout(function(){
//textarea
var text = $(".section-overview textarea").val();
// look for any "\n" occurences and replace them
var newString = text.replace(/\n/g, '');
// print new string
$(".section-overview textarea").val(newString);
},100);
}
});
});

Could you paste to a hidden textarea, copy from same textarea, and paste to your target?

Hate to say it, but I eventually gave up making TinyMCE handle Word crap the way I want. Now I just have an email sent to me every time a user's input contains certain HTML (look for <span lang="en-US"> for example) and I correct it manually.