chore(release): 5.4.5 [skip ci]

## [5.4.5](https://github.com/wickedest/Mergely/compare/v5.4.4...v5.4.5) (2026-02-23)

### Bug Fixes

* **#222:** Fixed issue with poor rendering performance and marker misalignment ([27778f0](27778f0840)), closes [#222](https://github.com/wickedest/Mergely/issues/222) [#227](https://github.com/wickedest/Mergely/issues/227)

CHANGELOG.md

@@ -1,3 +1,45 @@
+## [5.4.5](https://github.com/wickedest/Mergely/compare/v5.4.4...v5.4.5) (2026-02-23)
+
+
+### Bug Fixes
+
+* **#222:** Fixed issue with poor rendering performance and marker misalignment ([27778f0](https://github.com/wickedest/Mergely/commit/27778f0840895bf5e029d8c962e99890b8a0a8f6)), closes [#222](https://github.com/wickedest/Mergely/issues/222) [#227](https://github.com/wickedest/Mergely/issues/227)
+
+## [5.4.4](https://github.com/wickedest/Mergely/compare/v5.4.3...v5.4.4) (2026-02-23)
+
+
+### Bug Fixes
+
+* Updated examples README.md ([f1e58f5](https://github.com/wickedest/Mergely/commit/f1e58f58fea85628b1dd345b98b23923f05d8c2e))
+
+## [5.4.3](https://github.com/wickedest/Mergely/compare/v5.4.2...v5.4.3) (2026-02-23)
+
+
+### Bug Fixes
+
+* Removed whitespace from example ([69ecf76](https://github.com/wickedest/Mergely/commit/69ecf76fe6066ded1efca06f9ee0ad985e8ed047))
+
+## [5.4.2](https://github.com/wickedest/Mergely/compare/v5.4.1...v5.4.2) (2026-02-23)
+
+
+### Bug Fixes
+
+* Removed whitespace from example ([00a7917](https://github.com/wickedest/Mergely/commit/00a79170a8d4b701d6da98c1d6ea921b592fb3d1))
+
+## [5.4.1](https://github.com/wickedest/Mergely/compare/v5.4.0...v5.4.1) (2026-02-23)
+
+
+### Bug Fixes
+
+* **#225:** Fixes rendering issue when there are multiple editors ([1a2ee6a](https://github.com/wickedest/Mergely/commit/1a2ee6af3d7d87160e72e8faca5e38cf01b36fcb))
+
+# [5.4.0](https://github.com/wickedest/Mergely/compare/v5.3.6...v5.4.0) (2025-11-15)
+
+
+### Features
+
+* **#220:** Exposes Mergely's instance of CodeMirror as Mergely.CodeMirror ([#221](https://github.com/wickedest/Mergely/issues/221)) ([d6d8d06](https://github.com/wickedest/Mergely/commit/d6d8d06accaa4fa3a4352b95620e3e456226d444)), closes [#220](https://github.com/wickedest/Mergely/issues/220)
+
 ## [5.3.6](https://github.com/wickedest/Mergely/compare/v5.3.5...v5.3.6) (2024-10-11)
 
 

examples/README.md

@@ -1,6 +1,5 @@
 # Mergely examples
 
-
 ## Mergely development server
 
 To run the hot dev-server for development, you need to run:

examples/app-styles.js

@@ -2,9 +2,6 @@ require('codemirror/addon/selection/mark-selection.js');
 require('codemirror/lib/codemirror.css');
 require('../src/mergely.css');
 
-
-
-
 document.onreadystatechange = function () {
 	if (document.readyState !== 'complete') {
 		return;

examples/app.js

@@ -14,7 +14,6 @@ the quick brown fox
 jumped over the lazy dog
 `;
 
-
 document.onreadystatechange = function () {
 	if (document.readyState !== 'complete') {
 		return;

package-lock.json

@@ -1,12 +1,12 @@
 {
   "name": "mergely",
-  "version": "5.3.6",
+  "version": "5.4.5",
   "lockfileVersion": 3,
   "requires": true,
   "packages": {
     "": {
       "name": "mergely",
-      "version": "5.3.6",
+      "version": "5.4.5",
       "license": "(GPL-3.0 OR LGPL-3.0 OR MPL-1.1 OR SEE LICENSE IN LICENSE)",
       "devDependencies": {
         "@babel/core": "^7.1.6",

package.json

@@ -1,6 +1,6 @@
 {
   "name": "mergely",
-  "version": "5.3.6",
+  "version": "5.4.5",
   "description": "A javascript UI for diff/merge",
   "license": "(GPL-3.0 OR LGPL-3.0 OR MPL-1.1 OR SEE LICENSE IN LICENSE)",
   "author": {

src/diff-view.js

@@ -18,9 +18,11 @@ function CodeMirrorDiffView(el, options) {
 		const coords = this.cursorCoords(null, 'local');
 		this.scrollTo(null,
 			(coords.top + coords.bottom) / 2 - (this.getScrollerElement().clientHeight / 2));
-	});
-	this.init(el, options);
-};
+		});
+		this.init(el, options);
+	};
+
+CodeMirrorDiffView.CodeMirror = CodeMirror;
 
 const trace = console.log;
 const traceTimeStart = console.time;
@@ -316,7 +318,7 @@ CodeMirrorDiffView.prototype.bind = function(container) {
 			if (!notice) {
 				notice = noticeTypes.lgpl;
 			}
-			const editor = this._queryElement(`#${this.id}`);
+			const editor = this.el;
 			const splash = dom.getSplash({
 				notice,
 				left: (editor.offsetWidth - 300) / 2,
@@ -738,6 +740,10 @@ CodeMirrorDiffView.prototype._isChangeInView = function(side, vp, change) {
 		return true;
 	}
 
+	// there are 3 conditions to test
+	// 1: the change "from" is within the viewport from/to
+	// 2: the change "to" is within the viewport from/to
+	// 3: the change is so big that the viewport is within
 	return (change[`${side}-line-from`] >= vp.from && change[`${side}-line-from`] <= vp.to) ||
 		(change[`${side}-line-to`] >= vp.from && change[`${side}-line-to`] <= vp.to) ||
 		(vp.from >= change[`${side}-line-from`] && vp.to <= change[`${side}-line-to`]);
@@ -1088,8 +1094,8 @@ CodeMirrorDiffView.prototype._renderDiff = function(changes) {
 		ctx_lhs.strokeRect(1.5, mkr_lhs_y_start, 4.5, Math.max(mkr_lhs_y_end - mkr_lhs_y_start, 5));
 		ctx_lhs.stroke();
 
-		const mkr_rhs_y_start = change['rhs-y-start'] * lratio;
-		const mkr_rhs_y_end = Math.max(change['rhs-y-end'] * lratio, 5);
+		const mkr_rhs_y_start = change['rhs-y-start'] * rratio;
+		const mkr_rhs_y_end = Math.max(change['rhs-y-end'] * rratio, 5);
 		ctx_rhs.beginPath();
 		ctx_rhs.fillStyle = '#a3a3a3';
 		ctx_rhs.strokeStyle = '#000';
@@ -1198,7 +1204,7 @@ CodeMirrorDiffView.prototype._renderDiff = function(changes) {
 
 CodeMirrorDiffView.prototype._queryElement = function(selector) {
 	const cacheName = `_element:${selector}`;
-	const element = this[cacheName] || document.querySelector(selector);
+	const element = this[cacheName] || this.el.querySelector(selector);
 	if (!this[cacheName]) {
 		this[cacheName] = element;
 	}

src/mergely.js

@@ -253,6 +253,8 @@ class Mergely {
 	}
 }
 
+Mergely.CodeMirror = CodeMirrorDiffView.CodeMirror;
+
 window.Mergely = Mergely;
 
 module.exports = Mergely;

src/vdoc.js

@@ -205,9 +205,13 @@ class VDoc {
 		if (this.options._debug) {
 			trace('vdoc#update', side, editor, viewport);
 		}
-		const lines = Object.keys(this._lines[side]);
-		for (let i = 0; i < lines.length; ++i) {
-			const id = lines[i];
+		const keys = Object.keys(this._lines[side]);
+		// while Mergely diffs unicode diacritic chars (letters+mark),
+		// CM is by character, so diffs need to be mapped.
+		const mappedChars = mapLettersToChars(editor.getValue());
+
+		for (const key of keys) {
+			const { id } = this._lines[side][key];
 			if (id < viewport.from || id > viewport.to) {
 				continue;
 			}
@@ -216,7 +220,7 @@ class VDoc {
 			if (vline.rendered) {
 				continue;
 			}
-			vline.update(editor);
+			vline.update(editor, mappedChars);
 		}
 	}
 
@@ -257,7 +261,7 @@ class VLine {
 		this.markup.push([ charFrom, charTo, className ]);
 	}
 
-	update(editor) {
+	update(editor, mappedChars) {
 		if (this.rendered) {
 			// FIXME: probably do not need this now
 			console.log('already rendered', this.id);
@@ -279,18 +283,17 @@ class VLine {
 				editor.setGutterMarker(this.id, name, item);
 			}
 			if (this.markup.length) {
-				// while Mergely diffs unicode chars (letters+mark), CM is by character,
-				// so diffs need to be mapped.
-				const mapped = mapLettersToChars(editor.getValue());
+				// while Mergely diffs unicode diacritic chars (letters+mark),
+				// CM is by character, so diffs need to be mapped.
 				for (const markup of this.markup) {
 					const [ charFrom, charTo, className ] = markup;
 					const fromPos = { line: this.id };
 					const toPos = { line: this.id };
 					if (charFrom >= 0) {
-						fromPos.ch = mapped[charFrom];
+						fromPos.ch = mappedChars[charFrom];
 					}
 					if (charTo >= 0) {
-						toPos.ch = mapped[charTo];
+						toPos.ch = mappedChars[charTo];
 					}
 					this._clearMarkup.push(
 						editor.markText(fromPos, toPos, { className }));