Reorganizing paths

common/test/mock/latex.mjs

@@ -0,0 +1,90 @@
+/**
+ *  LogarithmPlotter - 2D plotter software to make BODE plots, sequences and distribution functions.
+ *  Copyright (C) 2021-2024  Ad5001
+ *
+ *  This program is free software: you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation, either version 3 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License
+ *  along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+import { TMP, existsSync, writeFileSync } from "./fs.mjs"
+
+const PIXEL = "iVBORw0KGgoAAAANSUhEUgAAAAEAAAABAQAAAAA3bvkkAAAACklEQVR4AWNgAAAAAgABc3UBGAAAAABJRU5ErkJggg=="
+
+export class MockLatex {
+    constructor() {
+    }
+
+    /**
+     * Creates a simple string hash.
+     * @param {string} string
+     * @return {number}
+     * @private
+     */
+    __hash(string) {
+        let hash = 0
+        let i, chr
+        if(string.length === 0) return hash
+        for(i = 0; i < string.length; i++) {
+            chr = string.charCodeAt(i)
+            hash = ((hash << 5) - hash) + chr
+            hash |= 0 // Convert to 32bit integer
+        }
+        return hash
+    }
+
+    /**
+     *
+     * @param {string} markup
+     * @param {number} fontSize
+     * @param {string} color
+     * @return {string}
+     * @private
+     */
+    __getFileName(markup, fontSize, color) {
+        const name = this.__hash(`${markup}_${fontSize}_${color}`)
+        return `${TMP}/${name}.png`
+    }
+
+    /**
+     * @param {string} markup - LaTeX markup to render
+     * @param {number} fontSize - Font size (in pt) to render
+     * @param {string} color - Color of the text to render
+     * @returns {string} - Comma separated data of the image (source, width, height)
+     */
+    render(markup, fontSize, color) {
+        const file = this.__getFileName(markup, fontSize, color)
+        writeFileSync(file, PIXEL, "base64")
+        return `${file},1,1`
+    }
+
+    /**
+     * @param {string} markup - LaTeX markup to render
+     * @param {number} fontSize - Font size (in pt) to render
+     * @param {string} color - Color of the text to render
+     * @returns {string} - Comma separated data of the image (source, width, height)
+     */
+    findPrerendered(markup, fontSize, color) {
+        const file = this.__getFileName(markup, fontSize, color)
+        if(existsSync(file))
+            return `${file},1,1`
+        return ""
+    }
+
+    /**
+     * Checks if the Latex installation is valid
+     * @returns {boolean}
+     */
+    checkLatexInstallation() {
+        return true // We're not *actually* doing any latex.
+    }
+}