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index.js
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index.js
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/* eslint-disable no-use-before-define */
/* eslint-disable no-console */
/* eslint-disable max-len */
// Diffing library
const DiffMatchPatch = require('diff-match-patch');
const merge = require('./helpers/merge');
const throttle = require('./helpers/throttle');
const debounce = require('./helpers/debounce');
const normalizeContent = require('./helpers/normalizeContent');
const getCurve = require('./visuals/getCurve');
const getMode = require('./visuals/getMode');
const getTheme = require('./visuals/getTheme');
const getLine = require('./visuals/getLine');
const getEditorHeight = require('./visuals/getEditorHeight');
const createArrow = require('./visuals/createArrow');
const ensureElement = require('./dom/ensureElement');
const query = require('./dom/query');
const C = require('./constants');
// Range module placeholder
let Range;
function getRangeModule(ace) {
if (ace.Range) {
return ace.Range;
}
const requireFunc = (ace.acequire || ace.require);
if (requireFunc) {
return requireFunc('ace/range');
}
return false;
}
// our constructor
function AceDiff(options = {}) {
// Ensure instance is a constructor with `new`
if (!(this instanceof AceDiff)) {
return new AceDiff(options);
}
// Current instance we pass around to other functions
const acediff = this;
const getDefaultAce = () => (window ? window.ace : undefined);
acediff.options = merge({
ace: getDefaultAce(),
mode: null,
theme: null,
element: null,
diffGranularity: C.DIFF_GRANULARITY_BROAD,
lockScrolling: false, // not implemented yet
showDiffs: true,
showConnectors: true,
maxDiffs: 5000,
left: {
id: null,
content: null,
mode: null,
theme: null,
editable: true,
copyLinkEnabled: true,
},
right: {
id: null,
content: null,
mode: null,
theme: null,
editable: true,
copyLinkEnabled: true,
},
classes: {
gutterID: 'acediff__gutter',
diff: 'acediff__diffLine',
connector: 'acediff__connector',
newCodeConnectorLink: 'acediff__newCodeConnector',
newCodeConnectorLinkContent: '→',
deletedCodeConnectorLink: 'acediff__deletedCodeConnector',
deletedCodeConnectorLinkContent: '←',
copyRightContainer: 'acediff__copy--right',
copyLeftContainer: 'acediff__copy--left',
},
connectorYOffset: 0,
}, options);
const { ace } = acediff.options;
if (!ace) {
const errMessage = 'No ace editor found nor supplied - `options.ace` or `window.ace` is missing';
console.error(errMessage);
return new Error(errMessage);
}
Range = getRangeModule(ace);
if (!Range) {
const errMessage = 'Could not require Range module for Ace. Depends on your bundling strategy, but it usually comes with Ace itself. See https://ace.c9.io/api/range.html, open an issue on GitHub ace-diff/ace-diff';
console.error(errMessage);
return new Error(errMessage);
}
if (acediff.options.element === null) {
const errMessage = 'You need to specify an element for Ace-diff - `options.element` is missing';
console.error(errMessage);
return new Error(errMessage);
}
if (acediff.options.element instanceof HTMLElement) {
acediff.el = acediff.options.element;
} else {
acediff.el = document.body.querySelector(acediff.options.element);
}
if (!acediff.el) {
const errMessage = `Can't find the specified element ${acediff.options.element}`;
console.error(errMessage);
return new Error(errMessage);
}
acediff.options.left.id = ensureElement(acediff.el, 'acediff__left');
acediff.options.classes.gutterID = ensureElement(acediff.el, 'acediff__gutter');
acediff.options.right.id = ensureElement(acediff.el, 'acediff__right');
acediff.el.innerHTML = `<div class="acediff__wrap">${acediff.el.innerHTML}</div>`;
// instantiate the editors in an internal data structure
// that will store a little info about the diffs and
// editor content
acediff.editors = {
left: {
ace: ace.edit(acediff.options.left.id),
markers: [],
lineLengths: [],
},
right: {
ace: ace.edit(acediff.options.right.id),
markers: [],
lineLengths: [],
},
editorHeight: null,
};
// set up the editors
acediff.editors.left.ace.getSession().setMode(getMode(acediff, C.EDITOR_LEFT));
acediff.editors.right.ace.getSession().setMode(getMode(acediff, C.EDITOR_RIGHT));
acediff.editors.left.ace.setReadOnly(!acediff.options.left.editable);
acediff.editors.right.ace.setReadOnly(!acediff.options.right.editable);
acediff.editors.left.ace.setTheme(getTheme(acediff, C.EDITOR_LEFT));
acediff.editors.right.ace.setTheme(getTheme(acediff, C.EDITOR_RIGHT));
acediff.editors.left.ace.setValue(normalizeContent(acediff.options.left.content), -1);
acediff.editors.right.ace.setValue(normalizeContent(acediff.options.right.content), -1);
// store the visible height of the editors (assumed the same)
acediff.editors.editorHeight = getEditorHeight(acediff);
// The lineHeight is set to 0 initially and we need to wait for another tick to get it
// Thus moving the diff() with it
setTimeout(() => {
// assumption: both editors have same line heights
acediff.lineHeight = acediff.editors.left.ace.renderer.lineHeight;
addEventHandlers(acediff);
createCopyContainers(acediff);
createGutter(acediff);
acediff.diff();
}, 1);
}
// our public API
AceDiff.prototype = {
// allows on-the-fly changes to the AceDiff instance settings
setOptions(options) {
merge(this.options, options);
this.diff();
},
getNumDiffs() {
return this.diffs.length;
},
// exposes the Ace editors in case the dev needs it
getEditors() {
return {
left: this.editors.left.ace,
right: this.editors.right.ace,
};
},
// our main diffing function. I actually don't think this needs to exposed: it's called automatically,
// but just to be safe, it's included
diff() {
const dmp = new DiffMatchPatch();
const val1 = this.editors.left.ace.getSession().getValue();
const val2 = this.editors.right.ace.getSession().getValue();
const diff = dmp.diff_main(val2, val1);
dmp.diff_cleanupSemantic(diff);
this.editors.left.lineLengths = getLineLengths(this.editors.left);
this.editors.right.lineLengths = getLineLengths(this.editors.right);
// parse the raw diff into something a little more palatable
const diffs = [];
const offset = {
left: 0,
right: 0,
};
diff.forEach((chunk, index, array) => {
const chunkType = chunk[0];
let text = chunk[1];
// Fix for #28 https://github.com/ace-diff/ace-diff/issues/28
if (array[index + 1] && text.endsWith('\n') && array[index + 1][1].startsWith('\n')) {
text += '\n';
diff[index][1] = text;
diff[index + 1][1] = diff[index + 1][1].replace(/^\n/, '');
}
// oddly, occasionally the algorithm returns a diff with no changes made
if (text.length === 0) {
return;
}
if (chunkType === C.DIFF_EQUAL) {
offset.left += text.length;
offset.right += text.length;
} else if (chunkType === C.DIFF_DELETE) {
diffs.push(computeDiff(this, C.DIFF_DELETE, offset.left, offset.right, text));
offset.right += text.length;
} else if (chunkType === C.DIFF_INSERT) {
diffs.push(computeDiff(this, C.DIFF_INSERT, offset.left, offset.right, text));
offset.left += text.length;
}
}, this);
// simplify our computed diffs; this groups together multiple diffs on subsequent lines
this.diffs = simplifyDiffs(this, diffs);
// if we're dealing with too many diffs, fail silently
if (this.diffs.length > this.options.maxDiffs) {
return;
}
clearDiffs(this);
decorate(this);
},
destroy() {
// destroy the two editors
const leftValue = this.editors.left.ace.getValue();
this.editors.left.ace.destroy();
let oldDiv = this.editors.left.ace.container;
let newDiv = oldDiv.cloneNode(false);
newDiv.textContent = leftValue;
oldDiv.parentNode.replaceChild(newDiv, oldDiv);
const rightValue = this.editors.right.ace.getValue();
this.editors.right.ace.destroy();
oldDiv = this.editors.right.ace.container;
newDiv = oldDiv.cloneNode(false);
newDiv.textContent = rightValue;
oldDiv.parentNode.replaceChild(newDiv, oldDiv);
document.getElementById(this.options.classes.gutterID).innerHTML = '';
removeEventHandlers();
},
};
let removeEventHandlers = () => { };
function addEventHandlers(acediff) {
acediff.editors.left.ace.getSession().on('changeScrollTop', throttle(() => { updateGap(acediff); }, 16));
acediff.editors.right.ace.getSession().on('changeScrollTop', throttle(() => { updateGap(acediff); }, 16));
const diff = acediff.diff.bind(acediff);
acediff.editors.left.ace.on('change', diff);
acediff.editors.right.ace.on('change', diff);
if (acediff.options.left.copyLinkEnabled) {
query.on(`#${acediff.options.classes.gutterID}`, 'click', `.${acediff.options.classes.newCodeConnectorLink}`, (e) => {
copy(acediff, e, C.LTR);
});
}
if (acediff.options.right.copyLinkEnabled) {
query.on(`#${acediff.options.classes.gutterID}`, 'click', `.${acediff.options.classes.deletedCodeConnectorLink}`, (e) => {
copy(acediff, e, C.RTL);
});
}
const onResize = debounce(() => {
acediff.editors.availableHeight = document.getElementById(acediff.options.left.id).offsetHeight;
// TODO this should re-init gutter
acediff.diff();
}, 250);
window.addEventListener('resize', onResize);
removeEventHandlers = () => {
window.removeEventListener('resize', onResize);
};
}
function copy(acediff, e, dir) {
const diffIndex = parseInt(e.target.getAttribute('data-diff-index'), 10);
const diff = acediff.diffs[diffIndex];
let sourceEditor;
let targetEditor;
let startLine;
let endLine;
let targetStartLine;
let targetEndLine;
if (dir === C.LTR) {
sourceEditor = acediff.editors.left;
targetEditor = acediff.editors.right;
startLine = diff.leftStartLine;
endLine = diff.leftEndLine;
targetStartLine = diff.rightStartLine;
targetEndLine = diff.rightEndLine;
} else {
sourceEditor = acediff.editors.right;
targetEditor = acediff.editors.left;
startLine = diff.rightStartLine;
endLine = diff.rightEndLine;
targetStartLine = diff.leftStartLine;
targetEndLine = diff.leftEndLine;
}
let contentToInsert = '';
for (let i = startLine; i < endLine; i += 1) {
contentToInsert += `${getLine(sourceEditor, i)}\n`;
}
// keep track of the scroll height
const h = targetEditor.ace.getSession().getScrollTop();
targetEditor.ace.getSession().replace(new Range(targetStartLine, 0, targetEndLine, 0), contentToInsert);
targetEditor.ace.getSession().setScrollTop(parseInt(h, 10));
acediff.diff();
}
function getLineLengths(editor) {
const lines = editor.ace.getSession().doc.getAllLines();
const lineLengths = [];
lines.forEach((line) => {
lineLengths.push(line.length + 1); // +1 for the newline char
});
return lineLengths;
}
// shows a diff in one of the two editors.
function showDiff(acediff, editor, startLine, endLine, className) {
const editorInstance = acediff.editors[editor];
if (endLine < startLine) { // can this occur? Just in case.
endLine = startLine;
}
const classNames = `${className} ${(endLine > startLine) ? 'lines' : 'targetOnly'}`;
// to get Ace to highlight the full row we just set the start and end chars to 0 and 1
editorInstance.markers.push(
editorInstance.ace.session.addMarker(
new Range(
startLine,
0,
endLine - 1 /* because endLine is always + 1 */,
1,
), classNames, 'fullLine',
),
);
}
// called onscroll. Updates the gap to ensure the connectors are all lining up
function updateGap(acediff) {
clearDiffs(acediff);
decorate(acediff);
// reposition the copy containers containing all the arrows
positionCopyContainers(acediff);
}
function clearDiffs(acediff) {
acediff.editors.left.markers.forEach((marker) => {
acediff.editors.left.ace.getSession().removeMarker(marker);
}, acediff);
acediff.editors.right.markers.forEach((marker) => {
acediff.editors.right.ace.getSession().removeMarker(marker);
}, acediff);
}
function addConnector(acediff, leftStartLine, leftEndLine, rightStartLine, rightEndLine) {
const leftScrollTop = acediff.editors.left.ace.getSession().getScrollTop();
const rightScrollTop = acediff.editors.right.ace.getSession().getScrollTop();
// All connectors, regardless of ltr or rtl
// have the same point system, even if p1 === p3 or p2 === p4
// p1 p2
//
// p3 p4
acediff.connectorYOffset = 1;
const p1_x = -1;
const p1_y = (leftStartLine * acediff.lineHeight) - leftScrollTop + 0.5;
const p2_x = acediff.gutterWidth + 1;
const p2_y = rightStartLine * acediff.lineHeight - rightScrollTop + 0.5;
const p3_x = -1;
const p3_y = (leftEndLine * acediff.lineHeight) - leftScrollTop + acediff.connectorYOffset + 0.5;
const p4_x = acediff.gutterWidth + 1;
const p4_y = (rightEndLine * acediff.lineHeight) - rightScrollTop + acediff.connectorYOffset + 0.5;
const curve1 = getCurve(p1_x, p1_y, p2_x, p2_y);
const curve2 = getCurve(p4_x, p4_y, p3_x, p3_y);
const verticalLine1 = `L${p2_x},${p2_y} ${p4_x},${p4_y}`;
const verticalLine2 = `L${p3_x},${p3_y} ${p1_x},${p1_y}`;
const d = `${curve1} ${verticalLine1} ${curve2} ${verticalLine2}`;
const el = document.createElementNS(C.SVG_NS, 'path');
el.setAttribute('d', d);
el.setAttribute('class', acediff.options.classes.connector);
acediff.gutterSVG.appendChild(el);
}
function addCopyArrows(acediff, info, diffIndex) {
if (info.leftEndLine > info.leftStartLine && acediff.options.left.copyLinkEnabled) {
const arrow = createArrow({
className: acediff.options.classes.newCodeConnectorLink,
topOffset: info.leftStartLine * acediff.lineHeight,
tooltip: 'Copy to right',
diffIndex,
arrowContent: acediff.options.classes.newCodeConnectorLinkContent,
});
acediff.copyRightContainer.appendChild(arrow);
}
if (info.rightEndLine > info.rightStartLine && acediff.options.right.copyLinkEnabled) {
const arrow = createArrow({
className: acediff.options.classes.deletedCodeConnectorLink,
topOffset: info.rightStartLine * acediff.lineHeight,
tooltip: 'Copy to left',
diffIndex,
arrowContent: acediff.options.classes.deletedCodeConnectorLinkContent,
});
acediff.copyLeftContainer.appendChild(arrow);
}
}
function positionCopyContainers(acediff) {
const leftTopOffset = acediff.editors.left.ace.getSession().getScrollTop();
const rightTopOffset = acediff.editors.right.ace.getSession().getScrollTop();
acediff.copyRightContainer.style.cssText = `top: ${-leftTopOffset}px`;
acediff.copyLeftContainer.style.cssText = `top: ${-rightTopOffset}px`;
}
/**
// eslint-disable-next-line max-len
* This method takes the raw diffing info from the Google lib and returns a nice clean object of the following
* form:
* {
* leftStartLine:
* leftEndLine:
* rightStartLine:
* rightEndLine:
* }
*
* Ultimately, that's all the info we need to highlight the appropriate lines in the left + right editor, add the
* SVG connectors, and include the appropriate <<, >> arrows.
*
* Note: leftEndLine and rightEndLine are always the start of the NEXT line, so for a single line diff, there will
* be 1 separating the startLine and endLine values. So if leftStartLine === leftEndLine or rightStartLine ===
* rightEndLine, it means that new content from the other editor is being inserted and a single 1px line will be
* drawn.
*/
function computeDiff(acediff, diffType, offsetLeft, offsetRight, diffText) {
let lineInfo = {};
// this was added in to hack around an oddity with the Google lib. Sometimes it would include a newline
// as the first char for a diff, other times not - and it would change when you were typing on-the-fly. This
// is used to level things out so the diffs don't appear to shift around
let newContentStartsWithNewline = /^\n/.test(diffText);
if (diffType === C.DIFF_INSERT) {
// pretty confident this returns the right stuff for the left editor: start & end line & char
var info = getSingleDiffInfo(acediff.editors.left, offsetLeft, diffText);
// this is the ACTUAL undoctored current line in the other editor. It's always right. Doesn't mean it's
// going to be used as the start line for the diff though.
var currentLineOtherEditor = getLineForCharPosition(acediff.editors.right, offsetRight);
var numCharsOnLineOtherEditor = getCharsOnLine(acediff.editors.right, currentLineOtherEditor);
const numCharsOnLeftEditorStartLine = getCharsOnLine(acediff.editors.left, info.startLine);
var numCharsOnLine = getCharsOnLine(acediff.editors.left, info.startLine);
// this is necessary because if a new diff starts on the FIRST char of the left editor, the diff can comes
// back from google as being on the last char of the previous line so we need to bump it up one
let rightStartLine = currentLineOtherEditor;
if (numCharsOnLine === 0 && newContentStartsWithNewline) {
newContentStartsWithNewline = false;
}
if (info.startChar === 0 && isLastChar(acediff.editors.right, offsetRight, newContentStartsWithNewline)) {
rightStartLine = currentLineOtherEditor + 1;
}
var sameLineInsert = info.startLine === info.endLine;
// whether or not this diff is a plain INSERT into the other editor, or overwrites a line take a little work to
// figure out. This feels like the hardest part of the entire script.
var numRows = 0;
if (
// dense, but this accommodates two scenarios:
// 1. where a completely fresh new line is being inserted in left editor, we want the line on right to stay a 1px line
// 2. where a new character is inserted at the start of a newline on the left but the line contains other stuff,
// we DO want to make it a full line
(info.startChar > 0 || (sameLineInsert && diffText.length < numCharsOnLeftEditorStartLine))
// if the right editor line was empty, it's ALWAYS a single line insert [not an OR above?]
&& numCharsOnLineOtherEditor > 0
// if the text being inserted starts mid-line
&& (info.startChar < numCharsOnLeftEditorStartLine)) {
numRows++;
}
lineInfo = {
leftStartLine: info.startLine,
leftEndLine: info.endLine + 1,
rightStartLine,
rightEndLine: rightStartLine + numRows,
};
} else {
var info = getSingleDiffInfo(acediff.editors.right, offsetRight, diffText);
var currentLineOtherEditor = getLineForCharPosition(acediff.editors.left, offsetLeft);
var numCharsOnLineOtherEditor = getCharsOnLine(acediff.editors.left, currentLineOtherEditor);
const numCharsOnRightEditorStartLine = getCharsOnLine(acediff.editors.right, info.startLine);
var numCharsOnLine = getCharsOnLine(acediff.editors.right, info.startLine);
// this is necessary because if a new diff starts on the FIRST char of the left editor, the diff can comes
// back from google as being on the last char of the previous line so we need to bump it up one
let leftStartLine = currentLineOtherEditor;
if (numCharsOnLine === 0 && newContentStartsWithNewline) {
newContentStartsWithNewline = false;
}
if (info.startChar === 0 && isLastChar(acediff.editors.left, offsetLeft, newContentStartsWithNewline)) {
leftStartLine = currentLineOtherEditor + 1;
}
var sameLineInsert = info.startLine === info.endLine;
var numRows = 0;
if (
// dense, but this accommodates two scenarios:
// 1. where a completely fresh new line is being inserted in left editor, we want the line on right to stay a 1px line
// 2. where a new character is inserted at the start of a newline on the left but the line contains other stuff,
// we DO want to make it a full line
(info.startChar > 0 || (sameLineInsert && diffText.length < numCharsOnRightEditorStartLine))
// if the right editor line was empty, it's ALWAYS a single line insert [not an OR above?]
&& numCharsOnLineOtherEditor > 0
// if the text being inserted starts mid-line
&& (info.startChar < numCharsOnRightEditorStartLine)) {
numRows++;
}
lineInfo = {
leftStartLine,
leftEndLine: leftStartLine + numRows,
rightStartLine: info.startLine,
rightEndLine: info.endLine + 1,
};
}
return lineInfo;
}
// helper to return the startline, endline, startChar and endChar for a diff in a particular editor. Pretty
// fussy function
function getSingleDiffInfo(editor, offset, diffString) {
const info = {
startLine: 0,
startChar: 0,
endLine: 0,
endChar: 0,
};
const endCharNum = offset + diffString.length;
let runningTotal = 0;
let startLineSet = false;
let endLineSet = false;
editor.lineLengths.forEach((lineLength, lineIndex) => {
runningTotal += lineLength;
if (!startLineSet && offset < runningTotal) {
info.startLine = lineIndex;
info.startChar = offset - runningTotal + lineLength;
startLineSet = true;
}
if (!endLineSet && endCharNum <= runningTotal) {
info.endLine = lineIndex;
info.endChar = endCharNum - runningTotal + lineLength;
endLineSet = true;
}
});
// if the start char is the final char on the line, it's a newline & we ignore it
if (info.startChar > 0 && getCharsOnLine(editor, info.startLine) === info.startChar) {
info.startLine++;
info.startChar = 0;
}
// if the end char is the first char on the line, we don't want to highlight that extra line
if (info.endChar === 0) {
info.endLine--;
}
const endsWithNewline = /\n$/.test(diffString);
if (info.startChar > 0 && endsWithNewline) {
info.endLine++;
}
return info;
}
// note that this and everything else in this script uses 0-indexed row numbers
function getCharsOnLine(editor, line) {
return getLine(editor, line).length;
}
function getLineForCharPosition(editor, offsetChars) {
const lines = editor.ace.getSession().doc.getAllLines();
let foundLine = 0;
let runningTotal = 0;
for (let i = 0; i < lines.length; i += 1) {
runningTotal += lines[i].length + 1; // +1 needed for newline char
if (offsetChars <= runningTotal) {
foundLine = i;
break;
}
}
return foundLine;
}
function isLastChar(editor, char, startsWithNewline) {
const lines = editor.ace.getSession().doc.getAllLines();
let runningTotal = 0;
for (let i = 0; i < lines.length; i += 1) {
runningTotal += lines[i].length + 1; // +1 needed for newline char
let comparison = runningTotal;
if (startsWithNewline) {
comparison -= 1;
}
if (char === comparison) {
break;
}
}
return isLastChar;
}
function createGutter(acediff) {
acediff.gutterHeight = document.getElementById(acediff.options.classes.gutterID).clientHeight;
acediff.gutterWidth = document.getElementById(acediff.options.classes.gutterID).clientWidth;
const leftHeight = getTotalHeight(acediff, C.EDITOR_LEFT);
const rightHeight = getTotalHeight(acediff, C.EDITOR_RIGHT);
const height = Math.max(leftHeight, rightHeight, acediff.gutterHeight);
acediff.gutterSVG = document.createElementNS(C.SVG_NS, 'svg');
acediff.gutterSVG.setAttribute('width', acediff.gutterWidth);
acediff.gutterSVG.setAttribute('height', height);
document.getElementById(acediff.options.classes.gutterID).appendChild(acediff.gutterSVG);
}
// acediff.editors.left.ace.getSession().getLength() * acediff.lineHeight
function getTotalHeight(acediff, editor) {
const ed = (editor === C.EDITOR_LEFT) ? acediff.editors.left : acediff.editors.right;
return ed.ace.getSession().getLength() * acediff.lineHeight;
}
// creates two contains for positioning the copy left + copy right arrows
function createCopyContainers(acediff) {
acediff.copyRightContainer = document.createElement('div');
acediff.copyRightContainer.setAttribute('class', acediff.options.classes.copyRightContainer);
acediff.copyLeftContainer = document.createElement('div');
acediff.copyLeftContainer.setAttribute('class', acediff.options.classes.copyLeftContainer);
document.getElementById(acediff.options.classes.gutterID).appendChild(acediff.copyRightContainer);
document.getElementById(acediff.options.classes.gutterID).appendChild(acediff.copyLeftContainer);
}
function clearGutter(acediff) {
// gutter.innerHTML = '';
const gutterEl = document.getElementById(acediff.options.classes.gutterID);
gutterEl.removeChild(acediff.gutterSVG);
createGutter(acediff);
}
function clearArrows(acediff) {
acediff.copyLeftContainer.innerHTML = '';
acediff.copyRightContainer.innerHTML = '';
}
/*
* This combines multiple rows where, say, line 1 => line 1, line 2 => line 2, line 3-4 => line 3. That could be
* reduced to a single connector line 1=4 => line 1-3
*/
function simplifyDiffs(acediff, diffs) {
const groupedDiffs = [];
function compare(val) {
return (acediff.options.diffGranularity === C.DIFF_GRANULARITY_SPECIFIC) ? val < 1 : val <= 1;
}
diffs.forEach((diff, index) => {
if (index === 0) {
groupedDiffs.push(diff);
return;
}
// loop through all grouped diffs. If this new diff lies between an existing one, we'll just add to it, rather
// than create a new one
let isGrouped = false;
for (let i = 0; i < groupedDiffs.length; i += 1) {
if (compare(Math.abs(diff.leftStartLine - groupedDiffs[i].leftEndLine))
&& compare(Math.abs(diff.rightStartLine - groupedDiffs[i].rightEndLine))) {
// update the existing grouped diff to expand its horizons to include this new diff start + end lines
groupedDiffs[i].leftStartLine = Math.min(diff.leftStartLine, groupedDiffs[i].leftStartLine);
groupedDiffs[i].rightStartLine = Math.min(diff.rightStartLine, groupedDiffs[i].rightStartLine);
groupedDiffs[i].leftEndLine = Math.max(diff.leftEndLine, groupedDiffs[i].leftEndLine);
groupedDiffs[i].rightEndLine = Math.max(diff.rightEndLine, groupedDiffs[i].rightEndLine);
isGrouped = true;
break;
}
}
if (!isGrouped) {
groupedDiffs.push(diff);
}
});
// clear out any single line diffs (i.e. single line on both editors)
const fullDiffs = [];
groupedDiffs.forEach((diff) => {
if (diff.leftStartLine === diff.leftEndLine && diff.rightStartLine === diff.rightEndLine) {
return;
}
fullDiffs.push(diff);
});
return fullDiffs;
}
function decorate(acediff) {
clearGutter(acediff);
clearArrows(acediff);
acediff.diffs.forEach((info, diffIndex) => {
if (acediff.options.showDiffs) {
showDiff(acediff, C.EDITOR_LEFT, info.leftStartLine, info.leftEndLine, acediff.options.classes.diff);
showDiff(acediff, C.EDITOR_RIGHT, info.rightStartLine, info.rightEndLine, acediff.options.classes.diff);
if (acediff.options.showConnectors) {
addConnector(acediff, info.leftStartLine, info.leftEndLine, info.rightStartLine, info.rightEndLine);
}
addCopyArrows(acediff, info, diffIndex);
}
}, acediff);
}
module.exports = AceDiff;