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61 lines
2.1 KiB
Markdown
61 lines
2.1 KiB
Markdown
# Useful JS Snippets for `jscommand` and `jsfile`
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In this document I will collect some of my and user-contributed ideas for how to utilize JS commands in the Vimrc plugin.
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If you have interesting snippets, please contribute by opening a pull request!
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## Jump to Next/Prev Markdown Header
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To map `]]` and `[[` to next/prev markdown header, I use the following.
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In a file I call `mdHelpers.js`, put this:
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```js
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// Taken from https://stackoverflow.com/questions/273789/is-there-a-version-of-javascripts-string-indexof-that-allows-for-regular-expr
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function regexIndexOf(string, regex, startpos) {
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var indexOf = string.substring(startpos || 0).search(regex);
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return (indexOf >= 0) ? (indexOf + (startpos || 0)) : indexOf;
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}
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function regexLastIndexOf(string, regex, startpos) {
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regex = (regex.global) ? regex : new RegExp(regex.source, "g" + (regex.ignoreCase ? "i" : "") + (regex.multiLine ? "m" : ""));
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if(typeof (startpos) == "undefined") {
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startpos = string.length;
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} else if(startpos < 0) {
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startpos = 0;
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}
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var stringToWorkWith = string.substring(0, startpos + 1);
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var lastIndexOf = -1;
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var nextStop = 0;
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while((result = regex.exec(stringToWorkWith)) != null) {
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lastIndexOf = result.index;
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regex.lastIndex = ++nextStop;
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}
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return lastIndexOf;
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}
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function jumpHeading(isForward) {
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const editor = view.editor;
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let posToSearchFrom = editor.getCursor();
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posToSearchFrom.line += isForward ? 1 : -1;
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const cursorOffset = editor.posToOffset(posToSearchFrom);
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const lookupToUse = isForward ? regexIndexOf : regexLastIndexOf;
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let headingOffset = lookupToUse(editor.getValue(), /^#(#*) /gm, cursorOffset);
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// If not found from the cursor position, try again from the document beginning (or reverse beginning)
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if (headingOffset === -1)
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headingOffset = lookupToUse(editor.getValue(), /^#(#*) /gm);
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const newPos = editor.offsetToPos(headingOffset);
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editor.setCursor(newPos);
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}
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```
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Then in your `.obsidian.vimrc` file add the following:
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```
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exmap nextHeading jsfile mdHelpers.js {jumpHeading(true)}
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exmap prevHeading jsfile mdHelpers.js {jumpHeading(false)}
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nmap ]] :nextHeading
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nmap [[ :prevHeading
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```
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