Created
February 23, 2017 12:25
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Rudimentary C format correcter written in Javascript
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| <!DOCTYPE html> | |
| <html> | |
| <head> | |
| <title>C Formatter</title> | |
| </head> | |
| <body> | |
| <textarea id="in" placeholder="IN" rows="10"></textarea> | |
| <textarea id="out" placeholder="OUT" rows="10"></textarea> | |
| <button id="go">GO</button> | |
| <script type="text/javascript"> | |
| const formInput = document.getElementById('in'); | |
| const formOutput = document.getElementById('out'); | |
| const formSubmit = document.getElementById('go'); | |
| formSubmit.onclick = function() { | |
| formOutput.value = format(formInput.value); | |
| } | |
| function format (input) { | |
| const lines = input.split('\n'); | |
| let analyzed = []; | |
| let formatted = []; | |
| let level = 0; | |
| let active = true; | |
| lines.forEach((line, index) => { | |
| const squashedLine = line.trim().replace(/ +/g, ' '); | |
| const startsComment = (line.indexOf('/*') !== -1); | |
| const endsComment = (line.indexOf('*/') !== -1); | |
| const hasComment = (line.indexOf('//') !== -1); | |
| const startsLevel = (line.indexOf('{') !== -1); | |
| const endsLevel = (line.indexOf('}') !== -1); | |
| if (startsComment) { active = false; } | |
| if (endsLevel) { level--; } | |
| analyzed.push({ | |
| active, | |
| level, | |
| comments: { | |
| single: hasComment, | |
| multi: (startsComment && endsComment) | |
| }, | |
| data: squashedLine | |
| }); | |
| if (startsLevel) { level++; } | |
| if (endsComment) { active = true; } | |
| }); | |
| let output = ''; | |
| analyzed.forEach((line, index) => { | |
| let formattedLine = line.data; | |
| // Remove tons of useless spaces | |
| const padding = ' '.repeat(line.level); | |
| formattedLine = `${padding}${formattedLine}`; | |
| // Remove stupid next-line brackets | |
| if (formattedLine.replace(/\/\*.*/, '').replace(/\/\/.*/, '').trim() === '{') { | |
| let lastLine = formatted[(formatted.length - 1)]; | |
| let minOffset = 1; | |
| while (lastLine.replace(/\/\*.*/, '').replace(/\/\/.*/, '').trim().length === 0) { | |
| lastLine = formatted[(formatted.length - (minOffset + 1))]; | |
| minOffset += 1; | |
| } | |
| const parentLine = formatted[formatted.length - minOffset]; | |
| if ((parentLine.indexOf('//') !== -1) || (parentLine.indexOf('/*') !== -1)) { | |
| const offsetter = parentLine.match(/ +(\/\/|\/\*)/); | |
| const parts = parentLine.split(/ +(\/\/|\/\*)/); | |
| const joined = `${parts[0]} \{${offsetter}${parts[2]}`; | |
| formatted[formatted.length - minOffset] = joined; | |
| } else { | |
| formatted[formatted.length - minOffset] += ' {'; | |
| } | |
| return; | |
| } | |
| // Right align stupid comments | |
| if (line.comments.single || line.comments.multi) { | |
| let foundStarter = -1 | |
| let starterChar = '//'; | |
| const singleStarter = formattedLine.indexOf('//'); | |
| const multiStarter = formattedLine.indexOf('/*'); | |
| if (singleStarter !== -1) { foundStarter = singleStarter; } | |
| if (multiStarter !== -1) { foundStarter = multiStarter; } | |
| if (foundStarter !== -1 && multiStarter !== -1) { starterChar = '/*' } | |
| if (foundStarter !== -1) { | |
| if (foundStarter < 100) { | |
| const spacing = ' '.repeat(100 - foundStarter - (padding * 4)); | |
| const parts = formattedLine.split(starterChar); | |
| formattedLine = `${parts[0]}${spacing}${starterChar}${parts[1]}`; | |
| } | |
| } | |
| } | |
| formatted.push(formattedLine); | |
| }); | |
| output = formatted.join('\n'); | |
| return output; | |
| } | |
| </script> | |
| </body> | |
| </html> |
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