Implemented generate passphrase functionality.

Author: astonbitecode

java/src/main/java/org/astonbitecode/rustkeylock/api/InterfaceWithRust.java

@@ -72,6 +72,11 @@ public void delete_entry(int index) {
         call(m);
     }
 
+    public void generate_passphrase(JavaEntry javaEntry, int index) {
+        Map<String, Object> m = GuiResponse.GeneratePassphrase(javaEntry, index);
+        call(m);
+    }
+
     public void export_import(String path, int export, String password, int number) {
         Map<String, Object> m = GuiResponse.ExportImport(path, export, password, number);
         call(m);

java/src/main/java/org/astonbitecode/rustkeylock/api/stubs/GuiResponse.java

@@ -65,6 +65,15 @@ public static Map<String, Object> ReplaceEntry(JavaEntry entry, Integer index) {
         return map;
     }
 
+    public static Map<String, Object> GeneratePassphrase(JavaEntry entry, Integer index) {
+        Map<String, Object> inner = new HashMap<>();
+        inner.put("entry", entry);
+        inner.put("index", index);
+        Map<String, Object> map = new HashMap<>();
+        map.put("GeneratePassphrase", inner);
+        return map;
+    }
+
     public static Map<String, Object> AddEntry(JavaEntry entry) {
         Map<String, Object> inner = new HashMap<>();
         inner.put("entry", entry);

java/src/main/java/org/astonbitecode/rustkeylock/fragments/ShowEntry.java

@@ -171,6 +171,10 @@ private void prepareUiElements(View v) {
             TextView passTitle = (TextView) v.findViewById(R.id.passwordLabel);
             passTitle.append(" (tap here to reveal or hide)");
             passTitle.setOnTouchListener(this);
+        } else if (edit) {
+            TextView passTitle = (TextView) v.findViewById(R.id.passwordLabel);
+            passTitle.append(" (tap here to generate new passphrase)");
+            passTitle.setOnTouchListener(this);
         }
         Button eb = (Button) v.findViewById(R.id.editButton);
         eb.setOnClickListener(this);
@@ -255,12 +259,24 @@ private void restore(Bundle state) {
 
     @Override
     public boolean onTouch(View view, MotionEvent motionEvent) {
-        if (motionEvent.getAction() == MotionEvent.ACTION_DOWN && !passwordVisibleWhenNotEditing) {
-            passwordText.setTransformationMethod(null);
-            passwordVisibleWhenNotEditing = !passwordVisibleWhenNotEditing;
-        } else if (motionEvent.getAction() == MotionEvent.ACTION_DOWN && passwordVisibleWhenNotEditing) {
-            passwordText.setTransformationMethod(PasswordTransformationMethod.getInstance());
-            passwordVisibleWhenNotEditing = !passwordVisibleWhenNotEditing;
+        if (!edit) {
+            if (motionEvent.getAction() == MotionEvent.ACTION_DOWN && !passwordVisibleWhenNotEditing) {
+                passwordText.setTransformationMethod(null);
+                passwordVisibleWhenNotEditing = !passwordVisibleWhenNotEditing;
+            } else if (motionEvent.getAction() == MotionEvent.ACTION_DOWN && passwordVisibleWhenNotEditing) {
+                passwordText.setTransformationMethod(PasswordTransformationMethod.getInstance());
+                passwordVisibleWhenNotEditing = !passwordVisibleWhenNotEditing;
+            }
+        } else {
+            Log.d(TAG, "Tapped to generate a new passphrase");
+            JavaEntry javaEntry = new JavaEntry();
+            javaEntry.name = nameText.getText() != null ? nameText.getText().toString() : "";
+            javaEntry.url = urlText.getText() != null ? urlText.getText().toString() : "";
+            javaEntry.user = userText.getText() != null ? userText.getText().toString() : "";
+            javaEntry.pass = passwordText.getText() != null ? passwordText.getText().toString() : "";
+            javaEntry.desc = descriptionText.getText() != null ? descriptionText.getText().toString() : "";
+
+            InterfaceWithRust.INSTANCE.generate_passphrase(javaEntry, entryIndex);
         }
         return true;
     }

rust/src/japi.rs

@@ -49,6 +49,7 @@ enum GuiResponse {
     UserOptionSelected { user_option: JavaUserOption },
     ExportImport { path: String, mode: usize, password: String, number: usize },
     Copy { data: String },
+    GeneratePassphrase { entry: JavaEntry, index: isize },
 }
 
 fn instance_to_gui_response(instance: Instance) -> UserSelection {
@@ -83,6 +84,20 @@ fn instance_to_gui_response(instance: Instance) -> UserSelection {
 
                 UserSelection::ReplaceEntry(index as usize, entry)
             }
+            GuiResponse::GeneratePassphrase { entry, index } => {
+                debug!("generate_passphrase");
+                let entry = Entry::new(entry.name,
+                                       entry.url,
+                                       entry.user,
+                                       entry.pass,
+                                       entry.desc);
+                let index_opt = if index < 0 {
+                    None
+                } else {
+                    Some(index as usize)
+                };
+                UserSelection::GeneratePassphrase(index_opt, entry)
+            }
             GuiResponse::DeleteEntry { index } => {
                 debug!("delete_entry");
                 UserSelection::DeleteEntry(index)