Add a context menu item to apply ROT13 to text selection in inputs

Core/FormBrowser.cs

@@ -321,6 +321,10 @@ public void TriggerTweetScreenshot(){
             browser.TriggerTweetScreenshot();
         }
 
+        public void ApplyROT13(){
+            browser.ApplyROT13();
+        }
+
         // callback handlers
         
         public void OnIntroductionClosed(bool showGuide, bool allowDataCollection){

Core/Handling/ContextMenuBrowser.cs

@@ -17,6 +17,7 @@ sealed class ContextMenuBrowser : ContextMenuBase{
         private const CefMenuCommand MenuOpenQuotedTweetUrl = (CefMenuCommand)26612;
         private const CefMenuCommand MenuCopyQuotedTweetUrl = (CefMenuCommand)26613;
         private const CefMenuCommand MenuScreenshotTweet    = (CefMenuCommand)26614;
+        private const CefMenuCommand MenuInputApplyROT13    = (CefMenuCommand)26615;
 
         private const string TitleReloadBrowser = "Reload browser";
         private const string TitleMuteNotifications = "Mute notifications";
@@ -41,6 +42,11 @@ public override void OnBeforeContextMenu(IWebBrowser browserControl, IBrowser br
             RemoveSeparatorIfLast(model);
 
             if (parameters.TypeFlags.HasFlag(ContextMenuType.Selection)){
+                if (parameters.TypeFlags.HasFlag(ContextMenuType.Editable)){
+                    model.AddSeparator();
+                    model.AddItem(MenuInputApplyROT13, "Apply ROT13");
+                }
+
                 model.AddSeparator();
             }
 
@@ -136,6 +142,10 @@ public override bool OnContextMenuCommand(IWebBrowser browserControl, IBrowser b
                 case MenuCopyQuotedTweetUrl:
                     SetClipboardText(form, lastHighlightedQuoteUrl);
                     return true;
+
+                case MenuInputApplyROT13:
+                    form.InvokeAsyncSafe(form.ApplyROT13);
+                    return true;
             }
 
             return false;

Core/TweetDeckBrowser.cs

@@ -226,5 +226,9 @@ public void ShowTweetDetail(string columnId, string chirpId, string fallbackUrl)
         public void TriggerTweetScreenshot(){
             browser.ExecuteScriptAsync("TDGF_triggerScreenshot()");
         }
+
+        public void ApplyROT13(){
+            browser.ExecuteScriptAsync("TDGF_applyROT13()");
+        }
     }
 }

Resources/Scripts/code.js

@@ -1072,6 +1072,23 @@
     }
   });
   
+  //
+  // Block: Allow applying ROT13 to input selection.
+  //
+  window.TDGF_applyROT13 = function(){
+    let ele = document.activeElement;
+    return if !ele || !ele.value;
+    
+    let selection = ele.value.substring(ele.selectionStart, ele.selectionEnd);
+    return if !selection;
+    
+    document.execCommand("insertText", false, selection.replace(/[a-zA-Z]/g, function(chr){
+      let code = chr.charCodeAt(0);
+      let start = code <= 90 ? 65 : 97;
+      return String.fromCharCode(start+(code-start+13)%26);
+    }));
+  };
+  
   //
   // Block: Fix DM reply input box not getting focused after opening a conversation.
   //