Send the current active line of text or if text is selected, send the selection... to the pane next to the active one

obsidian.templater.pane.send-to-next.js

<%*
//OPTIONS: TOP / BOTTOM
const whereToWrite = "TOP";
//OPTIONS: COPY / MOVE
const copyOrMove = "COPY";
//Find leaf next door
const thisLeaf = app.workspace.activeLeaf;
const thisFile = thisLeaf.view.file;
let leafToUse = app.workspace.getAdjacentLeafInDirection(thisLeaf, "right");
if(!leafToUse){leafToUse = app.workspace.getAdjacentLeafInDirection(thisLeaf, "left");}
if(!leafToUse){leafToUse = app.workspace.getAdjacentLeafInDirection(thisLeaf, "bottom");}
if(!leafToUse){leafToUse = app.workspace.getAdjacentLeafInDirection(thisLeaf, "top");}

if(leafToUse) {
    //Find selected text or text on current line
    const editor = app.workspace.activeLeaf.view.editor;
    if(editor.somethingSelected() === false) {
        const curLineNum = editor.getCursor().line;
        editor.setSelection({ line: curLineNum, ch: 0 }, { line: curLineNum, ch: editor.getLine(curLineNum).length });
    }
    let curLineStr = editor.getSelection();

    if(curLineStr) {
        curLineStr = curLineStr.trim();
        const nextEditor = leafToUse.view.editor;
        const foundFile = leafToUse.view.file;

        let lineNo = 0;
        switch(whereToWrite.toUpperCase()) {
            case "TOP":
                lineNo = 0;
                const mdCache = app.metadataCache.getFileCache(foundFile);
                if(mdCache) {
                    if(mdCache.frontmatter) {
                        lineNo = mdCache.frontmatter.position.end.line;
                    }
                }
                break;
            case "BOTTOM":
                lineNo = nextEditor.lastLine();
                break;
        }

        const curText = nextEditor.getLine(lineNo);
        nextEditor.setLine(lineNo,`${curText}\n${curLineStr}`);
        nextEditor.setCursor(lineNo + 1);

        switch(copyOrMove.toUpperCase()) {
            case "COPY":
                tR = curLineStr;
                break;
            case "MOVE":
                tR = "";
                break;
        }
    }
}
%>

If you only have 2 panes open then it will automatically send to the next pane (whichever side it is on). But if you have 3 or more panes open, it will first look right, then left, then below, and finally top. As soon as it finds a valid pane it will use that. Of course you could copy the script and make it into multiple where it switches the ordering. For example a "Send to left" script you could put the line to look to the left first in the code.

At the top you will notice 2 variables to set: whereToWrite and copyOrMove. They should be pretty self explanatory.