experimental: lat to cyr

background.js

@@ -1,13 +1,14 @@
 /*global browser, console*/
 
-async function execute(tab){
+async function execute(tab, direction) {
+  const file = direction === 'lat_to_cyr' ? 'srbtranslit.js' : 'srbtranslitToCyr.js';
   try {
     await browser.scripting.executeScript({
       target: {
         tabId: tab.id,
         allFrames: true,
       },
-      files: ['srbtranslit.js'],
+      files: [file],
     });
   } catch (err) {
     console.error(`failed to execute script: ${err}`);
@@ -23,12 +24,24 @@ browser.contextMenus.create(
   () => void browser.runtime.lastError,
 );
 
-browser.action.onClicked.addListener(async (tab) => execute(tab));
+browser.contextMenus.create(
+  {
+    id: "transliterate-to-cyr",
+    title: "Преслови у ћирилицу (experimental)",
+    contexts: ["page"],
+  },
+  () => void browser.runtime.lastError,
+);
+
+browser.action.onClicked.addListener(async (tab) => execute(tab, 'lat_to_cyr'));
 
 browser.contextMenus.onClicked.addListener((info, tab) => {
   switch (info.menuItemId) {
     case "transliterate-to-lat":
-      execute(tab).then(r => void browser.runtime.lastError);
+      execute(tab, 'lat_to_cyr').then(r => void browser.runtime.lastError);
+      break;
+    case "transliterate-to-cyr":
+      execute(tab, 'cyr_to_lat').then(r => void browser.runtime.lastError);
       break;
   }
 });

manifest.json

@@ -6,7 +6,7 @@
     }
   },
   "name": "srbTranslit",
-  "version": "2.1",
+  "version": "2.2",
   "permissions": [
     "activeTab",
     "scripting",

srbtranslitToCyr.js

@@ -0,0 +1,144 @@
+/*eslint-env es6*/
+/*global document*/
+// noinspection JSNonASCIINames
+let replaceLatToCyr = {
+    // multi letters first
+    "Nja": "Ња",
+    "Nje": "Ње",
+    "Nji": "Њи",
+    "Njo": "Њо",
+    "Nju": "Њу",
+    "Lja": "Ља",
+    "Lje": "Ље",
+    "Lji": "Љи",
+    "Ljo": "Љо",
+    "Lju": "Љу",
+    "Dža": "Џа",
+    "Dže": "Џе",
+    "Dži": "Џи",
+    "Džo": "Џо",
+    "Džu": "Џу",
+    "LJ": "Љ",
+    "NJ": "Њ",
+    "DŽ": "Џ",
+    "nj": "њ",
+    "lj": "љ",
+    "dž": "џ",
+    // then the rest
+    "A": "А",
+    "B": "Б",
+    "V": "В",
+    "G": "Г",
+    "D": "Д",
+    "Đ": "Ђ",
+    "E": "Е",
+    "Ž": "Ж",
+    "Z": "З",
+    "I": "И",
+    "J": "Ј",
+    "K": "К",
+    "L": "Л",
+    "M": "М",
+    "N": "Н",
+    "O": "О",
+    "P": "П",
+    "R": "Р",
+    "S": "С",
+    "Š": "Ш",
+    "T": "Т",
+    "Ć": "Ћ",
+    "U": "У",
+    "F": "Ф",
+    "H": "Х",
+    "C": "Ц",
+    "Č": "Ч",
+    "a": "а",
+    "b": "б",
+    "v": "в",
+    "g": "г",
+    "d": "д",
+    "đ": "ђ",
+    "e": "е",
+    "ž": "ж",
+    "z": "з",
+    "i": "и",
+    "j": "ј",
+    "k": "к",
+    "l": "л",
+    "m": "м",
+    "n": "н",
+    "o": "о",
+    "p": "п",
+    "r": "р",
+    "s": "с",
+    "š": "ш",
+    "t": "т",
+    "ć": "ћ",
+    "u": "у",
+    "f": "ф",
+    "h": "х",
+    "c": "ц",
+    "č": "ч",
+  },
+  getElementsWithNoChildren = function (target) {
+    'use strict';
+    let candidates;
+
+    if (target && typeof target.querySelectorAll === 'function') {
+      candidates = target.querySelectorAll('*');
+    } else if (target && typeof target.length === 'number') {
+      candidates = target;
+    } else {
+      candidates = document.querySelectorAll('*');
+    }
+
+    return Array.from(candidates).filter((elem) => {
+      if (elem.children.length === 0) {
+        return true;
+      } else {
+        let pass = false;
+        elem.childNodes.forEach(function (text) {
+          if (typeof text.nodeValue !== 'undefined') {
+            pass = typeof text.nodeValue !== 'undefined';
+          }
+        });
+        return pass;
+      }
+      // return elem.children.length === 0;
+    });
+  },
+  allElements;
+
+function transliterateToCyr(word) {
+  'use strict';
+  //TODO needs better splitting to assume multi characters
+  return word.split('').map(function (char) {
+    return replaceLatToCyr[char] || char;
+  }).join('');
+}
+
+function iterator(text) {
+  if (text.nodeValue && text.nodeValue.trim() !== '') {
+    text.nodeValue = transliterateToCyr(text.nodeValue);
+  }
+}
+
+function srbTranslit() {
+  'use strict';
+  let x,
+    elem;
+  allElements = getElementsWithNoChildren(document);
+
+  for (x = 0; x < allElements.length; x += 1) {
+    elem = allElements[x];
+    if (elem.children.length === 0) {
+      if (elem.textContent && elem.textContent !== '') {
+        elem.textContent = transliterateToCyr(elem.textContent);
+      }
+    } else {
+      elem.childNodes.forEach(iterator);
+    }
+  }
+}
+
+srbTranslit();