Condition to check for existing snap

[Kannan]

Hi @alyssaxuu . Right now snapping method is not getting triggered when the existing blocks are moved. So I have modified the source to include a new method called onExistingSnap on the function (function(canvas, grab, release, snapping, rearrange, spacing_x, spacing_y, onExistingSnap)).
This will add the block or put it to the previous state-based on the boolean returned;

I have added this condition in endDrag method:

`flowy.endDrag = function(event) {
......
else if (rearrange) {
....
for (var i = 0; i < blocks.length; i++) {
if (xpos >= blocks.filter(a => a.id == blocko[i])[0].x - (blocks.filter(a => a.id == blocko[i])[0].width / 2) - paddingx && xpos <= blocks.filter(a => a.id == blocko[i])[0].x + (blocks.filter(a => a.id == blocko[i])[0].width / 2) + paddingx && ypos >= blocks.filter(a => a.id == blocko[i])[0].y - (blocks.filter(a => a.id == blocko[i])[0].height / 2) && ypos <= blocks.filter(a => a.id == blocko[i])[0].y + blocks.filter(a => a.id == blocko[i])[0].height) {
active = false;
drag.classList.remove('dragging');

                        if (
                          onExistingSnap(
                            drag,
                            document.querySelector(
                              ".blockid[value='" + blocko[i] + "']"
                            ).parentNode
                          )
                        ) {
                          snap(drag, i, blocko);
                        } else {
                          snap(drag, blocko.indexOf(prevblock), blocko);
                        }
                        break;
                    } else if (i == blocks.length - 1) {
                        .....
                    }
                }
            }

......
}`

Please let me know your thoughts on this.

I will be happy to raise PR if this will work.

[Alyssa X]

That's cool, this has also been brought up in #74. I'll keep in mind for my next release (which will be a complete revamp + new features), but won't be implementing it at the time. Closing as the code is going to be different for the next version of Flowy (I think it's too messy to work with right now anyway ^^)

[hamzaGit19]

Hi @Kannndev , Thank you so much for this! It helped me days of hardwork.

And, @alyssaxuu great work on the library!