rework text processors (#793)24.4.21.0

* rework text processors

* rename text-preprocessors file

* Fix search header left margins on small screens (#839)

* Refocuses search input on backspace (#840)

Fixes #775. Note that this behavior gets overridden if backspace is set
as a shortcut action.

* Change hotkey triggering condition to account for IME usage (#837)

_isKeyCharacterInput only worked when not using an IME, as inside of an
IME when a keydown event is fired, the key is reported as "Process",
which does not have a key.length equal to 1. This resulted in hotkeys
being triggered while typing, which this commit fixes.

---------

Co-authored-by: James Maa <jmaa@berkeley.edu>
Co-authored-by: Kuuuube <61125188+Kuuuube@users.noreply.github.com>
Co-authored-by: Andrew Thomas Sartor <andrew@sartor.net>

1 files changed, 49 insertions, 0 deletions

diff --git a/ext/js/language/text-processors.js b/ext/js/language/text-processors.js
new file mode 100755
index 00000000..e7855df2
--- /dev/null
+++ b/ext/js/language/text-processors.js
@@ -0,0 +1,49 @@
+/*
+ * Copyright (C) 2024  Yomitan Authors
+ *
+ * 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/>.
+ */
+
+/** @type {import('language').TextProcessorOptions<boolean>} */
+export const basicTextProcessorOptions = [false, true];
+
+/** @type {import('language').TextProcessor<boolean>} */
+export const decapitalize = {
+    name: 'Decapitalize text',
+    description: 'CAPITALIZED TEXT → capitalized text',
+    options: basicTextProcessorOptions,
+    process: (str, setting) => (setting ? str.toLowerCase() : str)
+};
+
+/** @type {import('language').TextProcessor<boolean>} */
+export const capitalizeFirstLetter = {
+    name: 'Capitalize first letter',
+    description: 'lowercase text → Lowercase text',
+    options: basicTextProcessorOptions,
+    process: (str, setting) => (setting ? str.charAt(0).toUpperCase() + str.slice(1) : str)
+};
+
+/**
+ * WARNING: This should NOT be used with languages that use Han characters,
+ *          as it can result in undesirable normalization:
+ *            - '\u9038'.normalize('NFD') => '\u9038' (逸)
+ *            - '\ufa67'.normalize('NFD') => '\u9038' (逸 => 逸)
+ * @type {import('language').TextProcessor<boolean>}
+ */
+export const removeAlphabeticDiacritics = {
+    name: 'Remove Alphabetic Diacritics',
+    description: 'ἄήé -> αηe',
+    options: basicTextProcessorOptions,
+    process: (str, setting) => (setting ? str.normalize('NFD').replace(/[\u0300-\u036f]/g, '') : str)
+};