From f2536728d3ef013c7e4512d8901d9487930e1038 Mon Sep 17 00:00:00 2001
From: Alex Dima <alexdima@microsoft.com>
Date: Fri, 1 Mar 2019 23:15:02 +0100
Subject: [PATCH] Add monaco.editor.remeasureFonts
 (Microsoft/monaco-editor#392)

---
 src/vs/editor/browser/config/configuration.ts        | 9 +++++++++
 src/vs/editor/standalone/browser/standaloneEditor.ts | 9 +++++++++
 src/vs/monaco.d.ts                                   | 5 +++++
 3 files changed, 23 insertions(+)

diff --git a/src/vs/editor/browser/config/configuration.ts b/src/vs/editor/browser/config/configuration.ts
index f4a579bc8ce68..32e87b2a7949d 100644
--- a/src/vs/editor/browser/config/configuration.ts
+++ b/src/vs/editor/browser/config/configuration.ts
@@ -54,6 +54,10 @@ class CSSBasedConfigurationCache {
 	}
 }
 
+export function clearAllFontInfos(): void {
+	CSSBasedConfiguration.INSTANCE.clearCache();
+}
+
 export function readFontInfo(bareFontInfo: BareFontInfo): FontInfo {
 	return CSSBasedConfiguration.INSTANCE.readConfiguration(bareFontInfo);
 }
@@ -122,6 +126,11 @@ class CSSBasedConfiguration extends Disposable {
 		super.dispose();
 	}
 
+	public clearCache(): void {
+		this._cache = new CSSBasedConfigurationCache();
+		this._onDidChange.fire();
+	}
+
 	private _writeToCache(item: BareFontInfo, value: FontInfo): void {
 		this._cache.put(item, value);
 
diff --git a/src/vs/editor/standalone/browser/standaloneEditor.ts b/src/vs/editor/standalone/browser/standaloneEditor.ts
index bd5660f51e470..09d4b4bce4692 100644
--- a/src/vs/editor/standalone/browser/standaloneEditor.ts
+++ b/src/vs/editor/standalone/browser/standaloneEditor.ts
@@ -37,6 +37,7 @@ import { IMarker, IMarkerData } from 'vs/platform/markers/common/markers';
 import { INotificationService } from 'vs/platform/notification/common/notification';
 import { IOpenerService } from 'vs/platform/opener/common/opener';
 import { IAccessibilityService } from 'vs/platform/accessibility/common/accessibility';
+import { clearAllFontInfos } from 'vs/editor/browser/config/configuration';
 
 type Omit<T, K extends keyof T> = Pick<T, Exclude<keyof T, K>>;
 
@@ -311,6 +312,13 @@ export function setTheme(themeName: string): void {
 	StaticServices.standaloneThemeService.get().setTheme(themeName);
 }
 
+/**
+ * Clears all cached font measurements and triggers re-measurement.
+ */
+export function remeasureFonts(): void {
+	clearAllFontInfos();
+}
+
 /**
  * @internal
  */
@@ -340,6 +348,7 @@ export function createMonacoEditorAPI(): typeof monaco.editor {
 		tokenize: <any>tokenize,
 		defineTheme: <any>defineTheme,
 		setTheme: <any>setTheme,
+		remeasureFonts: remeasureFonts,
 
 		// enums
 		ScrollbarVisibility: standaloneEnums.ScrollbarVisibility,
diff --git a/src/vs/monaco.d.ts b/src/vs/monaco.d.ts
index 8084ebff34670..cf24813d108b4 100644
--- a/src/vs/monaco.d.ts
+++ b/src/vs/monaco.d.ts
@@ -923,6 +923,11 @@ declare namespace monaco.editor {
 	 */
 	export function setTheme(themeName: string): void;
 
+	/**
+	 * Clears all cached font measurements and triggers re-measurement.
+	 */
+	export function remeasureFonts(): void;
+
 	export type BuiltinTheme = 'vs' | 'vs-dark' | 'hc-black';
 
 	export interface IStandaloneThemeData {