work on UI components

This commit introduces some HTML and javascript (and tests for it) to use in constructing the new UI. This is partial work that is not yet finished.

1 files changed, 151 insertions, 0 deletions

diff --git a/html/item_preview.js b/html/item_preview.js
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--- /dev/null
+++ b/html/item_preview.js
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+/**
+ * This file is part of Haketilo.
+ *
+ * Function: Showing resource/mapping details in a browser.
+ *
+ * Copyright (C) 2022 Wojtek Kosior
+ *
+ * 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.
+ */
+
+#IMPORT common/indexeddb.js AS haketilodb
+#IMPORT html/dialog.js
+
+#FROM html/DOM_helpers.js IMPORT clone_template
+
+function populate_list(ul, items)
+{
+    for (const item of items) {
+	const li = document.createElement("li");
+	li.append(item);
+	ul.append(li);
+    }
+}
+
+async function file_link_clicked(preview_object, file_ref, event)
+{
+    event.preventDefault();
+
+    const db = await haketilodb.get();
+    const file = await haketilodb.idb_get(db.transaction("files"),
+					  "files", file_ref.hash_key);
+    if (file === undefined) {
+	dialog.error(preview_object.dialog_context,
+		     "File missing from Haketilo's inernal database :(");
+    } else {
+	const encoded_file = encodeURIComponent(file.contents);
+	open(`data:text/plain;charset=utf8,${encoded_file}`, '_blank');
+    }
+}
+
+function make_file_link(preview_object, file_ref)
+{
+    const a = document.createElement("a");
+    a.href = "javascript:void(0)";
+    a.innerText = file_ref.file;
+    a.addEventListener("click",
+		       e => file_link_clicked(preview_object, file_ref, e));
+
+    return a;
+}
+
+function resource_preview(resource, preview_object, dialog_context)
+{
+    if (preview_object === undefined)
+	preview_object = clone_template("resource_preview_div");
+
+    preview_object.identifier.innerText  = resource.identifier;
+    preview_object.long_name.innerText   = resource.long_name;
+    preview_object.uuid.innerText        = resource.uuid;
+    preview_object.version.innerText     =
+	`${resource.version.join(".")}-${resource.revision}`;
+    preview_object.description.innerText = resource.description;
+    preview_object.source_name.innerText = resource.source_name;
+
+    [...preview_object.dependencies.childNodes].forEach(n => n.remove());
+    populate_list(preview_object.dependencies, resource.dependencies);
+
+    const link_maker = file_ref => make_file_link(preview_object, file_ref);
+
+    [...preview_object.scripts.childNodes].forEach(n => n.remove());
+    populate_list(preview_object.scripts, resource.scripts.map(link_maker));
+
+    [...preview_object.copyright.childNodes].forEach(n => n.remove());
+    populate_list(preview_object.copyright,
+		  resource.source_copyright.map(link_maker));
+
+    preview_object.dialog_context = dialog_context;
+
+    return preview_object;
+}
+#EXPORT resource_preview
+
+function mapping_preview(mapping, preview_object, dialog_context)
+{
+    if (preview_object === undefined)
+	preview_object = clone_template("mapping_preview_div");
+
+    preview_object.identifier.innerText  = mapping.identifier;
+    preview_object.long_name.innerText   = mapping.long_name;
+    preview_object.uuid.innerText        = mapping.uuid;
+    preview_object.version.innerText     = mapping.version.join(".");
+    preview_object.description.innerText = mapping.description;
+    preview_object.source_name.innerText = mapping.source_name;
+
+    [...preview_object.payloads.childNodes].forEach(n => n.remove());
+    for (const [pattern, payload] of Object.entries(mapping.payloads).sort()) {
+	/* We use a non-breaking space because normal space would be ignored. */
+	const [nbsp, rarrow] = [160, 0x2192].map(n => String.fromCodePoint(n));
+	const texts = [`${pattern}${nbsp}`, `${rarrow}  ${payload.identifier}`];
+	for (let i = 0; i < texts.length; i++) {
+	    const span = document.createElement("span");
+	    span.innerText = texts[i];
+	    span.classList.add(`grid_col_${i + 1}`);
+	    preview_object.payloads.append(span);
+	}
+    }
+
+    const link_maker = file_ref => make_file_link(preview_object, file_ref);
+
+    [...preview_object.copyright.childNodes].forEach(n => n.remove());
+    populate_list(preview_object.copyright,
+		  mapping.source_copyright.map(link_maker));
+
+    preview_object.dialog_context = dialog_context;
+
+    return preview_object;
+}
+#EXPORT mapping_preview