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[VSoRC/.git] / node_modules / xterm / src / browser / renderer / atlas / CharAtlasCache.ts

diff --git a/node_modules/xterm/src/browser/renderer/atlas/CharAtlasCache.ts b/node_modules/xterm/src/browser/renderer/atlas/CharAtlasCache.ts
deleted file mode 100644 (file)
index 257835b..0000000
--- a/node_modules/xterm/src/browser/renderer/atlas/CharAtlasCache.ts
+++ /dev/null
@@ -1,95 +0,0 @@
-/**
- * Copyright (c) 2017 The xterm.js authors. All rights reserved.
- * @license MIT
- */
-
-import { generateConfig, configEquals } from 'browser/renderer/atlas/CharAtlasUtils';
-import { BaseCharAtlas } from 'browser/renderer/atlas/BaseCharAtlas';
-import { DynamicCharAtlas } from 'browser/renderer/atlas/DynamicCharAtlas';
-import { ICharAtlasConfig } from 'browser/renderer/atlas/Types';
-import { IColorSet } from 'browser/Types';
-import { ITerminalOptions } from 'common/services/Services';
-
-interface ICharAtlasCacheEntry {
-  atlas: BaseCharAtlas;
-  config: ICharAtlasConfig;
-  // N.B. This implementation potentially holds onto copies of the terminal forever, so
-  // this may cause memory leaks.
-  ownedBy: number[];
-}
-
-const charAtlasCache: ICharAtlasCacheEntry[] = [];
-
-/**
- * Acquires a char atlas, either generating a new one or returning an existing
- * one that is in use by another terminal.
- */
-export function acquireCharAtlas(
-  options: ITerminalOptions,
-  rendererId: number,
-  colors: IColorSet,
-  scaledCharWidth: number,
-  scaledCharHeight: number
-): BaseCharAtlas {
-  const newConfig = generateConfig(scaledCharWidth, scaledCharHeight, options, colors);
-
-  // Check to see if the renderer already owns this config
-  for (let i = 0; i < charAtlasCache.length; i++) {
-    const entry = charAtlasCache[i];
-    const ownedByIndex = entry.ownedBy.indexOf(rendererId);
-    if (ownedByIndex >= 0) {
-      if (configEquals(entry.config, newConfig)) {
-        return entry.atlas;
-      }
-      // The configs differ, release the renderer from the entry
-      if (entry.ownedBy.length === 1) {
-        entry.atlas.dispose();
-        charAtlasCache.splice(i, 1);
-      } else {
-        entry.ownedBy.splice(ownedByIndex, 1);
-      }
-      break;
-    }
-  }
-
-  // Try match a char atlas from the cache
-  for (let i = 0; i < charAtlasCache.length; i++) {
-    const entry = charAtlasCache[i];
-    if (configEquals(entry.config, newConfig)) {
-      // Add the renderer to the cache entry and return
-      entry.ownedBy.push(rendererId);
-      return entry.atlas;
-    }
-  }
-
-  const newEntry: ICharAtlasCacheEntry = {
-    atlas: new DynamicCharAtlas(
-      document,
-      newConfig
-    ),
-    config: newConfig,
-    ownedBy: [rendererId]
-  };
-  charAtlasCache.push(newEntry);
-  return newEntry.atlas;
-}
-
-/**
- * Removes a terminal reference from the cache, allowing its memory to be freed.
- */
-export function removeTerminalFromCache(rendererId: number): void {
-  for (let i = 0; i < charAtlasCache.length; i++) {
-    const index = charAtlasCache[i].ownedBy.indexOf(rendererId);
-    if (index !== -1) {
-      if (charAtlasCache[i].ownedBy.length === 1) {
-        // Remove the cache entry if it's the only renderer
-        charAtlasCache[i].atlas.dispose();
-        charAtlasCache.splice(i, 1);
-      } else {
-        // Remove the reference from the cache entry
-        charAtlasCache[i].ownedBy.splice(index, 1);
-      }
-      break;
-    }
-  }
-}