I am looking for a way to detect in which block my change occurred.
I'm writing a small markdown parser and want a simple UI, in order to keep positions and performance I only want the live preview to update the part I'm actually changing. For this to work I need to know which part in the ace editor I'm modifying.
When I use the onchange event the event data neatly specifies where my change occurred, which line and position. Before I start writing code which searches up and down for linebreaks I wanted to ask if there is a default way in the API to return which block changed.
You'll get something like this:
fs.readFile(__dirname + '/example.md', 'utf8', function(err, text) {
session = ace.createEditSession(text);
session.on('change', function(e, f) {
// getChangedParagraph does not exist and needs to return the
// actual block which changed.
var changedText = getChangedParagraph();
parseTheText(changedText);
});
editor.setSession(session);
});
There is no concept of blocks in ace. ace change events give line and column of change, You need to keep track of positions in the parser
Related
I'm using react-redux for a project I'm working on. I noticed that when I grab an object from my store and edit it, the object in state changes without me dispatching the change (but doesn't trigger a re-render on the components attached to that reducer's object). How can I stop state from changing without a dispatch?
For example if I do:
export function changeNeonGreenColourValue(colour) {
return (dispatch) => {
var neonColours = store.getState().colours.neon;
neonColours.green = colour;
dispatch(push('./home'));
};
}
And then in the layoutComponent I log:
console.log(this.props.state.colours.neon.green)
The output is still whatever I passed into changeNeonGreenColourValue() as "colour" but the page doesn't re-render to show that change. I know to get the page to re-render, all I have to do is dispatch the appropriate reducer case but I don't want the state object being altered at all unless I have an appropriate dispatch.
Apparently the 'standard' deep copying technique for solving this is to do a JSON stringifying and parse as so: const copiedObj = JSON.parse(JSON.stringify(sourceObj)); Unfortunately if you use this on large objects that will need parsing frequently you're going to have performance issues in your app as I do, if anyone has any suggestions for this I welcome them.
edit: so both jQuery and Loadash have their own implementations of deep cloning that are supposed to be better performance-wise:
https://lodash.com/docs/#cloneDeep
I personally implemented loadash to resolve my issue and it worked fine with little to no performance issues. I highly recommend it over JSON.stringify.
I'm having trouble with CodeMirror. I'm trying to add in live number scrubbing, similar to Brett Victor's example, and Khan Academy's capability, but I am not having too much luck.
I can't post links, but I found this library which kind of gets the job done (made by user FWeinb on GitHub) which can kind of accomplish what I'm looking for, but I've noticed that although the numbers appear to have been changed, as soon as I do something like press enter in CodeMirror, then the value of the variable resets to what it was originally.
I'm using ReactJS, and I am not too sure how to fix this. I'm trying something a little ludicrous by calling this.replaceRange every time the contents are being changed, but there must be a better way. Here is a snippet of my code. It's not what I want it to be ideally, but just for testing purposes:
this.cm.on('dblclick', this.handleDblClick.bind(this))
...
handleDblClick() {
let matches = document.querySelectorAll(".cm-number");
let scrub = new Scrubbing (matches[0],
{ driver :
[
Scrubbing.driver.Mouse,
Scrubbing.driver.MouseWheel,
Scrubbing.driver.Touch
]
})
matches[0].addEventListener('DOMSubtreeModified', () => {
//console.log('change detected')
})
}
So I know that currently the scrubber edits this: <span class="cm-number"></span>, but that the actual underlying data isn't updating with the scrubber, nor is it persisting. Can anyone shed some light on what I should be doing here so that the value of the variable within the editor is updating live with the scrubber, and so that the value persists upon a new action?
i have create module using module builder , now i am having a field called as book Name
now if i give same book name 2 time t is accepting .
i don't want to use and plug in for checking duplicate value because i want to learn the customization through code .
so i can call ajax and check in data base weather the same book name is exist in db or not but i don't know how controller works in sugar crm . and how to call ajax in sugar crm .
can any one guide me , your help is much appreciated .
If you really want to accomplish this using ajax then I'd recommend an entryPoint as the way to go. This customization will require a couple of simple things. First you'll write a little bit of javascript to perform the actual ajax call. That ajax call will post to the entryPoint you write. The entryPoint will run the query for you and return a response to you in the edit view. So lets get started by writing the entryPoint first.
First, open the file custom/include/MVC/Controller/entry_point_registry.php. If the folder structure and file do not exist yet, go ahead and create them.
Add the following code to the entry_point_registry.php file:
$entry_point_registry['test'] = array('file' => 'custom/test.php', 'auth' => true);
Some quick explanation about that line:
The index value of test can be changed to whatever you like. Perhaps 'unique_book_value' makes more sense in your case. You'll see how this value is used in a minute.
The file value in the array points to where you're gonna put your actual code. You should also give this a more meaningful name. It does NOT need to match the array key mentioned above.
The 'auth' => true part determines whether or not the browser needs to have an active logged in session with SugarCRM or not. In this case (and almost all) I'd suggest keeping this to true.
Now lets look at the code that will go in custom/test.php (or in your case unique_book_name.php):
/* disclaimer: we are not gonna get all crazy with using PDO and parameterized queries at this point,
but be aware that there is potential for sql injection here. The auth => true will help
mitigate that somewhat, but you're never supposed to trust any input, blah blah blah. */
global $db; // load the global sugarcrm database object for your query
$book_name = urldecode($_REQUEST['book_name']); // we are gonna start with $_REQUEST to make this easier to test, but consider changing to $_POST when confirmed working as expected
$book_id = urldecode($_REQUEST['book_id']); // need to make sure this still works as expected when editing an existing record
// the $db->quote is an alias for mysql_real_escape_string() It still does not protect you completely from sql injection, but is better than not using it...
$sql = "SELECT id FROM book_module_table_name WHERE deleted = 0 AND name = '".$db->quote($book_name)."' AND id <> '".$db->quote($book_id)."'";
$res = $db->query($sql);
if ($db->getRowCount($res) > 0) {
echo 'exists';
}
else {
echo 'unique';
}
A note about using direct database queries: There are api methods you can use to accomplish this. (hint: $bean->retrieve_by_string_fields() - check out this article if you wanna go that route: http://developer.sugarcrm.com/2012/03/23/howto-using-the-bean-instead-of-sql-all-the-time/) However, I find the api to be rather slow and ajax should be as fast as possible. If a client asked me to provide this functionality there's a 99% chance I'd use a direct db query. Might use PDO and parameterized query if I'm feeling fancy that day, but it's your call.
Using the above code you should be able to navigate to https://crm.yourdomain.com/index.php?entryPoint=test and run the code we just wrote.
However at this point all you're gonna get is a white screen. If you modify the url to include the entryPoint part and it loads your home page or does NOT go to a white screen there are 3 potential causes:
You put something different for $entry_point_registry['test']. If so change the url to read index.php?entryPoint=whatever_you_put_as_the_array_key
You have sugar in a folder or something on your domain so instead of crm.yourdomain.com it is located somewhere ugly and stupid like yourdomain.com/sugarcrm/ if this is the case just make sure that your are modifying the url such that the actual domain portion is preserved. Okay I'll spell it out for you... https://yourdomain.com/sugarcrm/index.php?entryPoint=test
This is more rare, but for some reason that I cannot figure out apache sometimes needs to be reloaded when adding a new entrypoint. If you have shell access a quick /etc/init.d/apache2 reload should do the trick. If you don't have shell access you may need to open a ticket with your hosting provider (or get a fricking vps where you have some control!!!, c'mon man!)
Still not working? Did you notice the "s" in https? Try http instead and buy a fricking $9 ssl cert, geez man!
Okay moving on. Let's test out the entryPoint a bit. Add a record to the book module. Let's add the book "War of Art" (no, not Art of War, although you should give that a read too).
Now in the url add this: index.php?entryPoint=test&book_name=Art%20of%20War
Oh gawd that url encoding is hideous right! Don't worry about it.
You should hopefully get an ugly white screen with the text "exists". If you do let's make sure it also works the other way. Add a 2 to the book name in the url and hopefully it will now say "unique".
Quick note: if you're using Sugar you're probably also using mysql which is case insensitive when searching on strings. If you really need case sensitivity check out this SO article:
How can I make SQL case sensitive string comparison on MySQL?
Okay so now we have our entryPoint working and we can move on to the fun part of making everything all ajaxical. There are a couple ways to go about this, but rather than going the most basic route I'm gonna show you what I've found to be the most reliable route.
You probably will need to create the following file: custom/modules/CUSTOM_BOOK_MODULE/views/view.edit.php (I hope by now I don't need to point out changing that path to use your module name...
Assuming this file did not exist and we are starting from scratch here is what it will need to look like:
if(!defined('sugarEntry') || !sugarEntry) die('Not A Valid Entry Point');
class CUSTOM_BOOK_MODULEViewEdit extends ViewEdit
{
public function display()
{
// make sure it works in the subpanel too
$this->useForSubpanel = true;
// make the name value available in the tpl file
$this->ss->assign('name_value', $this->bean->name);
// load the parsed contents of the tpl into this var
$name_input_code = $this->ss->fetch('custom/modules/CUSTOM_BOOK_MODULE/tpls/unique_book_checker.tpl.js');
// pass the parsed contents down into the editviewdefs
$this->ss->assign('custom_name_code', $name_input_code);
// definitely need to call the parent method
parent::display();
}
}
Things are looking good. Now we gotta write the code in this file: custom/modules/CUSTOM_BOOK_MODULE/tpls/unique_book_checker.tpl.js
First a couple of assumptions:
We're going to expect that this is Sugar 6.5+ and jquery is already available. If you're on an earlier version you'll need to manually include jquery.
We're going to put the event listener on the name field. If the book name value that you want to check is actually a different field name then simply adjust that in the javascript below.
Here is the code for custom/modules/CUSTOM_BOOK_MODULE/unique_book_checker.tpl.js:
<input type="text" name="name" id="name" maxlength="255" value="{$name_value}" />
<span id="book_unique_result"></span>
{literal}
<script type="text/javascript">
$(document).ready(function() {
$('#name').blur(function(){
$('#book_unique_result').html('<strong> checking name...</strong>');
$.post('index.php?entryPoint=test', {book_name: $('#name').val(), book_id: $('[name="record"]').val()}, function(data){
if (data == 'exists') {
removeFromValidate('EditView', 'name');
addToValidate('EditView', 'name', 'float', true, 'Book Name Must be Unique.');
$('#book_unique_result').html('<strong style="color:red;"> ✗</strong>');
}
else if (data == 'unique') {
removeFromValidate('EditView', 'name');
addToValidate('EditView', 'name', '', true, 'Name Required');
$('#book_unique_result').html('<strong style="color:green;"> ✓</strong>');
}
else {
// uh oh! maybe you have php display errors on?
}
});
});
});
</script>
{/literal}
Another Note: When the code detects that the name already exists we get a little hacky and use Sugar's built in validation stuff to prevent the record from saving. Basically, we are saying that if the name already exists then the name value MUST be a float. I figured this is pretty unlikely and will do the trick. However if you have a book named 3.14 or something like that and you try to create a duplicate this code will NOT prevent the save. It will tell you that a duplicate was found, but it will not prevent the save.
Phew! Okay last two steps and they are easy.
First, open the file: custom/modules/CUSTOM_BOOK_MODULE/metadata/editviewdefs.php.
Next, find the section that provides the metadata for the name field and add this customCode attribute so that it looks like this:
array (
'name' => 'name',
'customCode' => '{$custom_name_code}',
),
Finally, you'll need to do a quick repair and rebuild for the metadata changes to take effect. Go to Admin > Repair > Quick Repair & Rebuild.
Boom! You should be good to go!
I have several Birt Reports that I am trying to set up to run on a cron job that will email pdfs of the reports every morning. Everything is working fine as far as the generation and emailing goes; the only issue I am stuck with is this: if there is nothing to report, a pdf with just the report title is generated and emailed (a blank report, basically). I'd like to stop this report from being generated at all, so i can skip the emailing, if the pdf file does not exist.
I have been all over Google for two days now, and the closest I can find is this: http://www.eclipse.org/forums/index.php/t/458779/ in which someone was trying to solve a similar problem and received a push in the right direction, but not a complete solution.
It appears as if this can be done during the beforerender script... but how?
I know I need to:
set a persistent global variable in the oncreate if there is indeed data to report.
get the persistent global variable in the beforerender script.
send the magic don't generate report command.
I'm doing all of generating and emailing from a php script, not Java, so I can't send commands like IEngineTask.cancel() (or can I???)
Yes, I know I can make a row in the report that says "No data to report", but that's not what my users want.
And yes, I could query the database outside of the report to determine if there is valid data to report or not, but i'd prefer not to.
And maybe I could even open and read the pdf, programmatically to see if there is anything there, but that sounds like more of a hassle than it's worth...
So, how do I do this?
Thanks.
My answer is a little bit late, but I'm doing it like this in a framework that is working for hundreds of reports, probably it could be simplified for a single report:
Note that all the code is written from memory (not copied from our framework), so maybe it contains some errors.
Add an external Javascript file myframework.js to your report.
In this file, define an object myframework like this:
if (myframework == undefined) {
myframework = {
dataFound: false,
afterReport: function() {
// Write it to the appContext.
// Using Java, you could read it after the
// runAndRenderTask is done.
reportContext.getAppContext().put("dataFound", this.dataFound);
// But since you probably cannot the context
// (don't like coding Java?), the report has to
// tell it to he world some other way...
var txt = "dataFound=" + (dataFound? "true": "false");
var fw = new java.io.FileWriter("c:\\reportcontext.out");
fw.write(txt);
fw.close();
}
};
}
Add the JS file to your report's resources.
In your report, at a place where you decide that the report has found something (e.g. typically in a data set's onFetch event), tell the framework so by calling
myframework.dataFound = true;
In the reports's afterFactory or afterRender event, call
myframework.afterReport();
Then your report should create an output file c:\reportcontext.out which contains the information you need.
What is the best tool / practice to enable browser history for Flash (or AJAX) websites?
I guess the established practice is to set and read a hash-addition to the URL like
http://example.com/#id=1
I am aware of the Flex History Manager, but was wondering if there are any good alternatives to consider. Would also be interested in a general AJAX solution or best practice.
SWFAddress has been widely used and tested. It makes it almost trivial (given you plan ahead) to handle deeplinking in Flash. It provides a JS and AS library that work together and make the whole process pretty foolproof. You'd want to look at something like RSH for AJAX.
I've used swfadress for some small stuff.
For AJAX, something like Really Simple History is great.
This will seem a bit roundabout, but I'm currently using the dojo framework for that. There's a dojo.back that was very useful when my UI was mostly JS/HTML. Now that I've gone to flex for more power, fluid animations, and browser stability, the only thing I've need to keep using has been the back URL.
FlexBuilder seemed to have it's own browser history in default projects.
Also, the Flex 3 Cookbook has a recipe for using mx.managers.HistoryManager to create your own custom history management. I have plans to give this a try someday to remove our dependence on the dojo.back, but haven't had time yet.
I've rolled my own solutions that were ultra-simple like this:
(function() {
var oldHash, newHash;
function checkHash() {
// Grab the hash
newHash = document.location.hash;
// Check to see if it changed
if (oldHash != newHash) {
// Trigger a custom event if it changed,
// passing the old and new values as
// metadata on the event.
$(document).trigger('hash.changed', {
old: oldHash,
new: newHash
});
// Update the oldHash for the next check
oldHash = newHash;
}
}
// Poll the hash every 10 milliseconds.
// You might need to alter this time based
// on performance
window.setInterval(checkHash, 10);
})(jQuery);
Then you just need to have event handlers for the 'hash.changed' event to respond accordingly based on what the new value is. The approach works will in super simple cases.