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unit tests

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This commit is contained in:
Jörg Breitbart
2023-07-31 21:24:39 +02:00
parent 40eccfa61a
commit f407f0c5a6
3 changed files with 191 additions and 22 deletions
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src/browser/renderer/dom/WidthCache.ts
+9 -9
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@@ -7,7 +7,7 @@ import { IDisposable } from 'common/Types';
import { FontWeight } from 'common/services/Services';
const enum CacheSettings {
export const enum WidthCacheSettings {
FLAT_UNSET = -9999, // sentinel for unset values in flat cache
FLAT_SIZE = 256, // codepoint upper bound to handle in flat cache
REPEAT = 32 // char repeat for measuring
@@ -20,12 +20,12 @@ export class WidthCache implements IDisposable {
// It has a small memory footprint (only 1MB for full BMP caching),
// still the sweet spot is not reached before touching 32k different codepoints,
// thus we store the remaining <<20% of terminal data in a holey structure.
private _flat = new Float32Array(CacheSettings.FLAT_SIZE);
protected _flat = new Float32Array(WidthCacheSettings.FLAT_SIZE);
// holey cache for bold, italic and bold&italic for any string
// FIXME: can grow really big over time (~8.5 MB for full BMP caching),
// so a shared API across terminals is needed
private _holey: Map<string, number> | undefined;
protected _holey: Map<string, number> | undefined;
private _font = '';
private _fontSize = 0;
@@ -80,7 +80,7 @@ export class WidthCache implements IDisposable {
* Clear the width cache.
*/
public clear(): void {
this._flat.fill(CacheSettings.FLAT_UNSET);
this._flat.fill(WidthCacheSettings.FLAT_UNSET);
// .clear() has some overhead, re-assign instead (>3 times faster)
this._holey = new Map<string, number>();
}
@@ -121,8 +121,8 @@ export class WidthCache implements IDisposable {
*/
public get(c: string, bold: boolean | number, italic: boolean | number): number {
let cp = 0;
if (!bold && !italic && c.length === 1 && (cp = c.charCodeAt(0)) < CacheSettings.FLAT_SIZE) {
return this._flat[cp] !== CacheSettings.FLAT_UNSET
if (!bold && !italic && c.length === 1 && (cp = c.charCodeAt(0)) < WidthCacheSettings.FLAT_SIZE) {
return this._flat[cp] !== WidthCacheSettings.FLAT_UNSET
? this._flat[cp]
: (this._flat[cp] = this._measure(c, 0));
}
@@ -140,9 +140,9 @@ export class WidthCache implements IDisposable {
return width;
}
private _measure(c: string, variant: number): number {
protected _measure(c: string, variant: number): number {
const el = this._measureElements[variant];
el.textContent = c.repeat(CacheSettings.REPEAT);
return el.getBoundingClientRect().width / CacheSettings.REPEAT;
el.textContent = c.repeat(WidthCacheSettings.REPEAT);
return el.getBoundingClientRect().width / WidthCacheSettings.REPEAT;
}
}