Add UI for changing direction of the document and input fields. Bug 85420, patch by Asaf Romano <bugs.mano@mail-central.com>, r=smontagu, sr=neil

suite/browser/navigator.js

@@ -660,6 +660,14 @@ function Startup()
   gClickSelectsAll = pref.getBoolPref("browser.urlbar.clickSelectsAll");
   gClickAtEndSelects = pref.getBoolPref("browser.urlbar.clickAtEndSelects");
 
+  // BiDi UI
+  gShowBiDi = isBidiEnabled();
+  if (gShowBiDi) {
+    document.getElementById("documentDirection-swap").hidden = false;
+    document.getElementById("textfieldDirection-separator").hidden = false;
+    document.getElementById("textfieldDirection-swap").hidden = false;
+  }
+
   // now load bookmarks after a delay
   setTimeout(LoadBookmarksCallback, 0);
 }
@@ -2507,3 +2515,47 @@ function updateFileUploadItem()
   else
     item.setAttribute('disabled', 'true');
 }
+
+function isBidiEnabled()
+{
+  var rv = false;
+
+  var systemLocale;
+  try {
+    var localeService = Components.classes["@mozilla.org/intl/nslocaleservice;1"]
+                                 .getService(Components.interfaces.nsILocaleService);
+    systemLocale = localeService.getSystemLocale().getCategory("NSILOCALE_CTYPE");
+    rv = /^(he|ar|syr|fa|ur)-/.test(systemLocale);
+  } catch (e) {}
+
+  if (!rv) {
+    // check the overriding pref
+    try {
+      rv = pref.getBoolPref("bidi.browser.ui");
+    }
+    catch (e) {}
+  }
+
+  return rv;
+}
+
+function SwitchDocumentDirection(aWindow)
+{
+  aWindow.document.dir = (aWindow.document.dir == "ltr" ? "rtl" : "ltr");
+
+  for (var run = 0; run < aWindow.frames.length; run++)
+    SwitchDocumentDirection(aWindow.frames[run]);
+}
+
+function SwitchFocusedTextEntryDirection()
+{
+  // The keybinding shoudn't work if the menu item is hidden
+  if (gShowBiDi) {
+    var focusedElement = document.commandDispatcher.focusedElement;
+    if (focusedElement)
+      if (window.getComputedStyle(focusedElement, "").direction == "ltr")
+        focusedElement.style.direction = "rtl";
+      else
+        focusedElement.style.direction = "ltr";
+  }
+}

suite/browser/navigatorOverlay.xul

@@ -86,7 +86,11 @@
     <key id="key_paste"/>
     <key id="key_delete"/>
     <key id="key_selectAll"/>
-  
+    <key id="key_SwitchTextDirection"
+            key="&bidiSwitchTextDirectionItem.commandkey;"
+            command="cmd_SwitchTextDirection"
+            modifiers="accel,shift" />
+
           <!-- View Menu -->
     <key id="key_reload"  key="&reloadCmd.commandkey;" oncommand="BrowserReload();" modifiers="accel"/>
     <key key="&reloadCmd.commandkey;" oncommand="BrowserReloadSkipCache();" modifiers="accel,shift"/>
@@ -154,6 +158,7 @@
     <command id="cmd_paste"/>
     <command id="cmd_delete"/>
     <command id="cmd_selectAll" observes="isImage"/>
+    <command id="cmd_SwitchTextDirection" oncommand="SwitchFocusedTextEntryDirection();" disabled="true" />
 
     <!-- Content area context menu -->
     <command id="cmd_copyLink"/>
@@ -164,7 +169,8 @@
     <command id="View:PageSource" oncommand="BrowserViewSourceOfDocument(content.document);" observes="isImage"/>
     <command id="View:PageInfo"   oncommand="BrowserPageInfo();"/>
     <command id="View:FullScreen" oncommand="BrowserFullScreen();"/>
-  
+    <command id="cmd_SwitchDocumentDirection" oncommand="SwitchDocumentDirection(window.content);" />
+ 
     <!-- Search Menu -->
     <command id="Browser:Find" oncommand="BrowserFind();" observes="isImage"/>
     <command id="Browser:FindAgain" oncommand="BrowserFindAgain(false);" observes="isImage"/>
@@ -374,6 +380,13 @@
         <menuitem id="menu_findTypeLinks"/>
         <menuitem id="menu_findTypeText"/>
 
+        <menuseparator hidden="true" id="textfieldDirection-separator"/>
+        <menuitem hidden="true" id="textfieldDirection-swap" 
+                label="&bidiSwitchTextDirectionItem.label;"
+                key="key_SwitchTextDirection"
+                accesskey="&bidiSwitchTextDirectionItem.accesskey;"
+                command="cmd_SwitchTextDirection"/>
+
         <menuseparator id="menu_PrefsSeparator"/> 
         <menuitem id="menu_preferences" oncommand="goPreferences('navigator', 'chrome://communicator/content/pref/pref-navigator.xul', 'navigator')"/>
       </menupopup>
@@ -409,6 +422,10 @@
           </menupopup>
         </menu>
         <menu id="charsetMenu" observes="isImage"/>
+        <menuitem hidden="true" id="documentDirection-swap"
+                  label="&bidiSwitchPageDirectionItem.label;"
+                  accesskey="&bidiSwitchPageDirectionItem.accesskey;"
+                  command="cmd_SwitchDocumentDirection"/>
         <menuseparator />
         <menuitem accesskey="&pageSourceCmd.accesskey;" label="&pageSourceCmd.label;" key="key_viewSource" command="View:PageSource"/>
         <menuitem accesskey="&pageInfoCmd.accesskey;"   label="&pageInfoCmd.label;"   key="key_viewInfo"   command="View:PageInfo"/>

suite/locales/en-US/chrome/browser/navigator.dtd

@@ -198,3 +198,8 @@
 
 <!ENTITY popupIcon.tooltiptext      "Unblock this site's popups">
 
+<!ENTITY bidiSwitchPageDirectionItem.label        "Switch Page Direction">
+<!ENTITY bidiSwitchPageDirectionItem.accesskey    "g">
+<!ENTITY bidiSwitchTextDirectionItem.label        "Switch Text Direction">
+<!ENTITY bidiSwitchTextDirectionItem.accesskey    "w">
+<!ENTITY bidiSwitchTextDirectionItem.commandkey   "X">