Move into monaco-editor-samples folder

monaco-editor-samples/browser-amd-diff-editor/modified.txt

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+
+/// <reference path="../../references.js" />
+(function () {
+	"use strict";
+	
+	var deltaDecorations = function (oldDecorations, newDecorations) {
+		/// <summary>
+		///   Update oldDecorations to match newDecorations.
+		///   It will remove old decorations which are not found in new decorations
+		///   and add only the really new decorations.
+		/// </summary>
+		/// <param name="oldDecorations" type="Array">
+		///   An array containing ids of existing decorations
+		/// </param>
+		/// <param name="newDecorations" type="Array">
+		///   An array containing literal objects describing new decorations. A
+		///   literal contains the following two fields:
+		///      range
+		///      options
+		/// </param>
+		/// <returns type="Array">
+		///   Returns an array of decorations ids
+		/// </returns>
+		var hashFunc = function (range, options) {
+			return range.startLineNumber + "," + range.startColumn + "-" + range.endLineNumber + "," + range.endColumn +
+				"-" + options.hoverMessage + "-" + options.className + "-" + options.isOverlay + "-" + options.showInOverviewRuler;
+		};
+		return this.changeDecorations(function (changeAccessor) {
+			var i, len, oldDecorationsMap = {}, hash;
+			
+			// Record old decorations in a map
+			// Two decorations can have the same hash
+			for (i = 0, len = oldDecorations.length; i < len; i++) {
+				hash = hashFunc(this.getDecorationRange(oldDecorations[i]), this.getDecorationOptions(oldDecorations[i]));
+				oldDecorationsMap[hash] = oldDecorationsMap[hash] || [];
+				oldDecorationsMap[hash].push(oldDecorations[i]);
+			}
+			
+			// Add only new decorations & mark reused ones
+			var j, lenJ, result = [], usedOldDecorations = {}, oldDecorationsCandidates, reusedOldDecoration;
+			for (i = 0, len = newDecorations.length; i < len; i++) {
+				hash = hashFunc(newDecorations[i].range, newDecorations[i].options);
+				reusedOldDecoration = false;
+				if (oldDecorationsMap.hasOwnProperty(hash)) {
+					oldDecorationsCandidates = oldDecorationsMap[hash];
+					// We can try reusing an old decoration (if it hasn't been reused before)
+					for (j = 0, lenJ = oldDecorationsCandidates.length; j < lenJ; j++) {
+						if (!usedOldDecorations.hasOwnProperty(oldDecorationsCandidates[j])) {
+							// Found an old decoration which can be reused & it hasn't been reused before
+							reusedOldDecoration = true;
+							usedOldDecorations[oldDecorationsCandidates[j]] = true;
+							result.push(oldDecorationsCandidates[j]);
+							break;
+						}
+					}
+				}
+				
+				if (!reusedOldDecoration) {
+					result.push(changeAccessor.addDecoration(newDecorations[i].range, newDecorations[i].options));
+				}
+			}
+			
+			// Remove unused old decorations
+			for (i = 0, len = oldDecorations.length; i < len; i++) {
+				if (!usedOldDecorations.hasOwnProperty(oldDecorations[i])) {
+					changeAccessor.removeDecoration(oldDecorations[i]);
+				}
+			}
+			
+			return result;
+		}.bind(this));
+	};
+
+})();