Tally-Extension/background.js at main · caret-collective/Tally-Extension · GitHub

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;(function(){
	function count(info) {
		const text = info.selectionText,
					len = text.length

		let	wordflag = false,
				sentflag = false,
				paraflag = false
				count = {
					characters: 0,
					words: 0,
					sentences: 0,
					paragraphs: 0,
					spaces: 0,
					letters: 0,
					digits: 0,
					specialcharacters: 0
				}

		for (var i = 0; i < len; i++) {
			current = text[i]
			count.characters++

			if (/\d/.test(current)) {
				wordflag = true
				sentflag = true
				paraflag = true
				count.digits++
			}

			else if (/\w/.test(current)) {
				wordflag = true
				sentflag = true
				paraflag = true
				count.letters++
			}

			else {
				if (/ /.test(current)) {
					count.spaces++

					if (wordflag) {
						wordflag = false
						count.words++
					}
				}
				else if (/[\.\?\!]/.test(current)) {
					if (wordflag) {
						wordflag = false
						count.words++
					}

					if (sentflag) {
						sentflag = false
						count.sentences++
					}
				}
				else if (/\n/.test(current)) {
					if (wordflag) {
						wordflag = false
						count.words++
					}

					if (sentflag) {
						sentflag = false
						count.sentences++
					}

					if (paraflag) {
						paraflag = false
						count.paragraphs++
					}
				}
				else {
					count.specialcharacters++
				}
			}
		}

		if (wordflag) {
			count.words++
		}

		if (sentflag) {
			count.sentences++
		}

		if (paraflag) {
			count.paragraphs++
		}

		chrome.tabs.query({active: true, currentWindow: true}, function(tabs) {
			chrome.tabs.sendMessage(tabs[0].id, count)
		});
	}

	chrome.contextMenus.create({
		id: 'twocaretcat-Tally-count',
		title: 'Tally Word Counter: Count',
		contexts: ['selection']
	});

	chrome.contextMenus.onClicked.addListener(function(info, tab) {
		if (info.menuItemId == 'twocaretcat-Tally-count') {
			count(info)
		}
	});
})();