translate all site fixes to the new Hydrilla format

Fixes in new format are yet to be tested. Things may break.
Alternative site interfaces were removed. This repository is meant exclusively for holding fixes for js-encumbered websites. Jahoti's SParse code shall be put in a separate repository.

1 files changed, 210 insertions, 0 deletions

diff --git a/src/google_sheets_download.js b/src/google_sheets_download.js
new file mode 100644
index 0000000..24149ca
--- /dev/null
+++ b/src/google_sheets_download.js
@@ -0,0 +1,210 @@
+/**
+ * SPDX-License-Identifier: LicenseRef-GPL-3.0-or-later-WITH-js-exceptions
+ *
+ * Make spreadsheets on drive.google.com browsable without nonfree js
+ *
+ * Copyright (C) 2021 Wojtek Kosior <koszko@koszko.org>
+ *
+ * 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.
+ *
+ * As additional permission under GNU GPL version 3 section 7, you
+ * may distribute forms of that code without the copy of the GNU
+ * GPL normally required by section 4, provided you include this
+ * license notice and, in case of non-source distribution, a URL
+ * through which recipients can access the Corresponding Source.
+ * If you modify file(s) with this exception, you may extend this
+ * exception to your version of the file(s), but you are not
+ * obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ *
+ * As a special exception to the GPL, any HTML file which merely
+ * makes function calls to this code, and for that purpose
+ * includes it by reference shall be deemed a separate work for
+ * copyright law purposes. If you modify this code, you may extend
+ * this exception to your version of the code, but you are not
+ * obligated to do so. If you do not wish to do so, delete this
+ * exception statement from your version.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ *
+ * I, Wojtek Kosior, thereby promise not to sue for violation of this file's
+ * license. Although I request that you do not make use of this code in a
+ * proprietary program, I am not going to enforce this in court.
+ */
+
+/* Use with https://docs.google.com/spreadsheets/d/** */
+
+/* Make the view scrollable. */
+
+document.body.setAttribute("style",
+			   "width: 100vw; height: 100vh; overflow: scroll;" +
+			   (document.body.getAttribute("style") || ""));
+
+let container = document.querySelectorAll(".waffle")[0];
+let main_gid = null;
+
+while (container) {
+    container = container.parentElement;
+    console.log(container);
+    if (container === document.body || !container)
+	break;
+
+    const match = /([0-9]+)-grid-container/.exec(container.id);
+    if (match)
+	main_gid = match[1];
+
+    container.setAttribute("style",
+			   "width: fit-content; width: -moz-fit-content;");
+}
+
+
+/* Remove editor toolbars and bottom bar - these don't work anyway. */
+
+const docs_chrome = document.getElementById("docs-chrome");
+if (docs_chrome)
+    docs_chrome.remove()
+const grid_bottom_bar = document.getElementById("grid-bottom-bar");
+if (grid_bottom_bar)
+    grid_bottom_bar.remove()
+
+
+/* Remove no Javascript warning. */
+
+for (const no_js_warning of document.querySelectorAll("noscript"))
+    no_js_warning.remove();
+
+
+/* Get opengraph data. */
+
+const og = {};
+
+for (const node of document.head.childNodes) {
+    if (node.tagName === "STYLE") {
+	document.head.removeChild(node);
+	continue;
+    }
+
+    if (node.tagName !== "META")
+	continue;
+
+    const match = /^og:(.+)/.exec(node.getAttribute("property"));
+    if (!match)
+	continue;
+
+    og[match[1]] = node.getAttribute("content");
+}
+
+
+/* Construct download link. */
+
+let download_link = null;
+
+const match = new RegExp("/spreadsheets/d/([^/]+)").exec(document.URL);
+if (match)
+    download_link = `https://docs.google.com/spreadsheets/d/${match[1]}/export`;
+
+
+/* Add title bar with sheet name and download button. */
+
+const title_bar = document.createElement("div");
+const title_heading = document.createElement("h1");
+const title_text = document.createElement("span");
+const main_download_button = document.createElement("a");
+
+main_download_button.textContent = "download";
+main_download_button.setAttribute("style", "border-radius: 10px; padding: 20px; color: #333; background-color: lightgreen; text-decoration: none; box-shadow: -4px 8px 8px #888; display: inline-block;");
+
+if (og.title) {
+    title_text.textContent = og.title;
+    title_heading.appendChild(title_text);
+}
+
+title_text.setAttribute("style", "margin-right: 10px;");
+
+if (download_link) {
+    main_download_button.setAttribute("href", download_link);
+    title_heading.appendChild(main_download_button);
+}
+
+title_bar.setAttribute("style", "padding: 0 20px; color: #555;");
+
+title_bar.appendChild(title_heading);
+
+document.body.insertBefore(title_bar, document.body.firstElementChild);
+
+
+/* Extract sheet data from a script that sets the `bootstrapData' variable. */
+
+let data = null;
+for (const script of document.scripts) {
+    const match = /bootstrapData = ({([^;]|[^}];)+})/.exec(script.textContent);
+    if (!match)
+	continue;
+    data = JSON.parse(match[1]);
+}
+
+/*
+ * Add download buttons for individual sheets belonging to this spreadsheet.
+ * Data schema has been observed by looking at various spreadsheets.
+ */
+
+function add_sheet_download(data)
+{
+    if (!Array.isArray(data))
+	return;
+
+    const gid = data[2];
+    if (!["string", "number"].includes(typeof gid))
+	return;
+
+    const sheet_download_link = `${download_link}?gid=${gid}`;
+    const sheet_download_button = document.createElement("a");
+
+    sheet_download_button.setAttribute("style", "border-radius: 5px; padding: 10px; color: #333; background-color: lightgreen; text-decoration: none; box-shadow: -4px 8px 8px #888; display: inline-block; margin: 0 5px 5px 0;");
+    sheet_download_button.setAttribute("href", sheet_download_link);
+
+    let sheet_name = null;
+    if (Array.isArray(data[3]) &&
+	data[3][0] && typeof data[3][0] === "object"
+	&& Array.isArray(data[3][0][1]) &&
+	Array.isArray(data[3][0][1][0]) &&
+	typeof data[3][0][1][0][2] === "string") {
+
+	const sheet_name = data[3][0][1][0][2];
+	sheet_download_button.textContent = sheet_name;
+        if (gid == main_gid)
+	    title_text.textContent = `${title_text.textContent} - ${sheet_name}`;
+    } else {
+	sheet_download_button.textContent = `<sheet gid=${gid}>`;
+    }
+
+    title_bar.appendChild(sheet_download_button);
+}
+
+if (download_link) {
+    for (const entry of data.changes.topsnapshot) {
+	if (!Array.isArray(entry) || entry[0] !== 21350203 ||
+	    typeof entry[1] !== "string")
+	    continue;
+
+	let entry_data = null;
+
+	try {
+	    entry_data = JSON.parse(entry[1]);
+	} catch (e) {
+	    console.log(e);
+	    continue;
+	}
+
+	add_sheet_download(entry_data);
+    }
+}