Bug 1389829 - Part 1 - Add "View Page Source" to the Page menu in the UI. r=nechen

The Page menu is disabled when no tab is open, so not doing a null-check on the
currently selected tab in the menu click handler is safe.

MozReview-Commit-ID: CYKHJ5N1q8I

--HG--
extra : rebase_source : 3ec7b1a9708a905785850feb44b48723c24f1363

mobile/android/app/src/main/res/menu-large/browser_app_menu.xml

@@ -86,6 +86,9 @@
             <item android:id="@+id/set_as_homepage"
                   android:title="@string/contextmenu_set_as_homepage"/>
 
+            <item android:id="@+id/view_page_source"
+                  android:title="@string/view_page_source"/>
+
         </menu>
 
     </item>

mobile/android/app/src/main/res/menu-xlarge/browser_app_menu.xml

@@ -87,6 +87,9 @@
             <item android:id="@+id/set_as_homepage"
                   android:title="@string/contextmenu_set_as_homepage"/>
 
+            <item android:id="@+id/view_page_source"
+                  android:title="@string/view_page_source"/>
+
         </menu>
 
     </item>

mobile/android/app/src/main/res/menu/browser_app_menu.xml

@@ -86,6 +86,9 @@
             <item android:id="@+id/set_as_homepage"
                   android:title="@string/contextmenu_set_as_homepage"/>
 
+            <item android:id="@+id/view_page_source"
+                  android:title="@string/view_page_source"/>
+
         </menu>
 
     </item>

mobile/android/base/java/org/mozilla/gecko/BrowserApp.java

@@ -3540,6 +3540,7 @@ public class BrowserApp extends GeckoApp
         final MenuItem historyList = aMenu.findItem(R.id.history_list);
         final MenuItem saveAsPDF = aMenu.findItem(R.id.save_as_pdf);
         final MenuItem print = aMenu.findItem(R.id.print);
+        final MenuItem viewPageSource = aMenu.findItem(R.id.view_page_source);
         final MenuItem charEncoding = aMenu.findItem(R.id.char_encoding);
         final MenuItem findInPage = aMenu.findItem(R.id.find_in_page);
         final MenuItem desktopMode = aMenu.findItem(R.id.desktop_mode);
@@ -3568,6 +3569,7 @@ public class BrowserApp extends GeckoApp
             saveAsPDF.setEnabled(false);
             print.setEnabled(false);
             findInPage.setEnabled(false);
+            viewPageSource.setEnabled(false);
 
             // NOTE: Use MenuUtils.safeSetEnabled because some actions might
             // be on the BrowserToolbar context menu.
@@ -3730,8 +3732,10 @@ public class BrowserApp extends GeckoApp
         print.setEnabled(allowPDF);
         print.setVisible(Versions.feature19Plus);
 
-        // Disable find in page for about:home, since it won't work on Java content.
-        findInPage.setEnabled(!isAboutHome(tab));
+        // Disable find in page and view source for about:home, since it won't work on Java content.
+        final boolean notInAboutHome = !isAboutHome(tab);
+        findInPage.setEnabled(notInAboutHome);
+        viewPageSource.setEnabled(notInAboutHome);
 
         charEncoding.setVisible(GeckoPreferences.getCharEncodingState());
 
@@ -3929,6 +3933,13 @@ public class BrowserApp extends GeckoApp
             return true;
         }
 
+        if (itemId == R.id.view_page_source) {
+            tab = Tabs.getInstance().getSelectedTab();
+            final GeckoBundle args = new GeckoBundle(1);
+            args.putInt("tabId", tab.getId());
+            getAppEventDispatcher().dispatch("Tab:ViewSource", args);
+        }
+
         if (itemId == R.id.settings) {
             intent = new Intent(this, GeckoPreferences.class);
 

mobile/android/base/locales/en-US/android_strings.dtd

@@ -453,6 +453,7 @@
 <!ENTITY share_image_failed "Unable to share this image">
 <!ENTITY save_as_pdf "Save as PDF">
 <!ENTITY print "Print">
+<!ENTITY view_page_source "View Page Source">
 <!ENTITY find_in_page "Find in page">
 <!ENTITY desktop_mode "Request desktop site">
 <!ENTITY page "Page">

mobile/android/base/strings.xml.in

@@ -107,6 +107,7 @@
   <string name="share_image_failed">&share_image_failed;</string>
   <string name="save_as_pdf">&save_as_pdf;</string>
   <string name="print">&print;</string>
+  <string name="view_page_source">&view_page_source;</string>
   <string name="find_in_page">&find_in_page;</string>
   <string name="desktop_mode">&desktop_mode;</string>
   <string name="page">&page;</string>