diff options
Diffstat (limited to 'app/assets/javascripts/ide/lib/diff/diff.js')
-rw-r--r-- | app/assets/javascripts/ide/lib/diff/diff.js | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/app/assets/javascripts/ide/lib/diff/diff.js b/app/assets/javascripts/ide/lib/diff/diff.js new file mode 100644 index 00000000000..0e37f5c4704 --- /dev/null +++ b/app/assets/javascripts/ide/lib/diff/diff.js @@ -0,0 +1,30 @@ +import { diffLines } from 'diff'; + +// eslint-disable-next-line import/prefer-default-export +export const computeDiff = (originalContent, newContent) => { + const changes = diffLines(originalContent, newContent); + + let lineNumber = 1; + return changes.reduce((acc, change) => { + const findOnLine = acc.find(c => c.lineNumber === lineNumber); + + if (findOnLine) { + Object.assign(findOnLine, change, { + modified: true, + endLineNumber: (lineNumber + change.count) - 1, + }); + } else if ('added' in change || 'removed' in change) { + acc.push(Object.assign({}, change, { + lineNumber, + modified: undefined, + endLineNumber: (lineNumber + change.count) - 1, + })); + } + + if (!change.removed) { + lineNumber += change.count; + } + + return acc; + }, []); +}; |