Support correct keyboards for multi-line text editing. (#4115)

This addresses part of #8028, implementing the Engine-side support for it.

shell/platform/android/io/flutter/plugin/editing/InputConnectionAdaptor.java

@@ -8,6 +8,7 @@ import android.content.Context;
 import android.text.Editable;
 import android.text.Selection;
 import android.view.inputmethod.BaseInputConnection;
+import android.view.inputmethod.EditorInfo;
 import android.view.inputmethod.InputMethodManager;
 import android.view.KeyEvent;
 
@@ -92,7 +93,7 @@ class InputConnectionAdaptor extends BaseInputConnection {
     public boolean deleteSurroundingText(int beforeLength, int afterLength) {
         if (Selection.getSelectionStart(mEditable) == -1 ||
             Selection.getSelectionStart(mEditable) == -1)
-            return true;
+            return true;9c518cb751e34b0
 
         boolean result = super.deleteSurroundingText(beforeLength, afterLength);
         updateEditingState();
@@ -162,8 +163,17 @@ class InputConnectionAdaptor extends BaseInputConnection {
     @Override
     public boolean performEditorAction(int actionCode) {
         // TODO(abarth): Support more actions.
-        mFlutterChannel.invokeMethod("TextInputClient.performAction",
-            Arrays.asList(mClient, "TextInputAction.done"));
+        switch (actionCode) {
+            case EditorInfo.IME_ACTION_NONE:
+                mFlutterChannel.invokeMethod("TextInputClient.performAction",
+                    Arrays.asList(mClient, "TextInputAction.newline"));
+                break;
+            default:
+            case EditorInfo.IME_ACTION_DONE:
+                mFlutterChannel.invokeMethod("TextInputClient.performAction",
+                    Arrays.asList(mClient, "TextInputAction.done"));
+                break;
+        }
         return true;
     }
 }

shell/platform/android/io/flutter/plugin/editing/TextInputPlugin.java

@@ -88,7 +88,9 @@ public class TextInputPlugin implements MethodCallHandler {
             return InputType.TYPE_CLASS_PHONE;
 
         int textType = InputType.TYPE_CLASS_TEXT;
-        if (inputType.equals("TextInputType.emailAddress"))
+        if (inputType.equals("TextInputType.multiline"))
+            textType |= InputType.TYPE_TEXT_FLAG_MULTI_LINE;
+        else if (inputType.equals("TextInputType.emailAddress"))
             textType |= InputType.TYPE_TEXT_VARIATION_EMAIL_ADDRESS;
         else if (inputType.equals("TextInputType.url"))
             textType |= InputType.TYPE_TEXT_VARIATION_URI;
@@ -102,6 +104,12 @@ public class TextInputPlugin implements MethodCallHandler {
         return textType;
     }
 
+    private static int inputActionFromTextInputAction(String inputAction) {
+        if (inputAction.equals("TextInputAction.newline"))
+            return EditorInfo.IME_ACTION_NONE;
+        return EditorInfo.IME_ACTION_DONE;
+    }
+
     public InputConnection createInputConnection(FlutterView view, EditorInfo outAttrs)
         throws JSONException {
         if (mClient == 0)
@@ -111,9 +119,22 @@ public class TextInputPlugin implements MethodCallHandler {
             mConfiguration.getString("inputType"),
             mConfiguration.optBoolean("obscureText"),
             mConfiguration.optBoolean("autocorrect", true));
-        if (!mConfiguration.isNull("actionLabel"))
-          outAttrs.actionLabel = mConfiguration.getString("actionLabel");
-        outAttrs.imeOptions = EditorInfo.IME_ACTION_DONE | EditorInfo.IME_FLAG_NO_FULLSCREEN;
+        outAttrs.imeOptions = EditorInfo.IME_FLAG_NO_FULLSCREEN;
+        int enterAction;
+        if (mConfiguration.isNull("inputAction")) {
+            // If an explicit input action isn't set, then default to none for multi-line fields
+            // and done for single line fields.
+            enterAction = (InputType.TYPE_TEXT_FLAG_MULTI_LINE & outAttrs.inputType) != 0
+                ? EditorInfo.IME_ACTION_NONE
+                : EditorInfo.IME_ACTION_DONE;
+        } else {
+            enterAction = inputActionFromTextInputAction(mConfiguration.getString("inputAction"));
+        }
+        if (!mConfiguration.isNull("actionLabel")) {
+            outAttrs.actionLabel = mConfiguration.getString("actionLabel");
+            outAttrs.actionId = enterAction;
+        }
+        outAttrs.imeOptions |= enterAction;
 
         InputConnectionAdaptor connection = new InputConnectionAdaptor(view, mClient, mFlutterChannel, mEditable);
         outAttrs.initialSelStart = Math.max(Selection.getSelectionStart(mEditable), 0);

shell/platform/darwin/ios/framework/Source/FlutterTextInputDelegate.h

@@ -9,6 +9,7 @@
 
 typedef NS_ENUM(NSInteger, FlutterTextInputAction) {
   FlutterTextInputActionDone,
+  FlutterTextInputActionNewline,
 };
 
 @protocol FlutterTextInputDelegate<NSObject>

shell/platform/darwin/ios/framework/Source/FlutterTextInputPlugin.mm

@@ -12,6 +12,8 @@ static const char _kTextAffinityUpstream[] = "TextAffinity.upstream";
 static UIKeyboardType ToUIKeyboardType(NSString* inputType) {
   if ([inputType isEqualToString:@"TextInputType.text"])
     return UIKeyboardTypeDefault;
+  if ([inputType isEqualToString:@"TextInputType.multiline"])
+    return UIKeyboardTypeDefault;
   if ([inputType isEqualToString:@"TextInputType.number"])
     return UIKeyboardTypeDecimalPad;
   if ([inputType isEqualToString:@"TextInputType.phone"])
@@ -23,6 +25,12 @@ static UIKeyboardType ToUIKeyboardType(NSString* inputType) {
   return UIKeyboardTypeDefault;
 }
 
+static UIReturnKeyType ToUIReturnKeyType(NSString* inputType) {
+  if ([inputType isEqualToString:@"TextInputType.multiline"])
+    return UIReturnKeyDefault;
+  return UIReturnKeyDone;
+}
+
 static UITextAutocapitalizationType ToUITextAutocapitalizationType(NSString* inputType) {
   if ([inputType isEqualToString:@"TextInputType.text"])
     return UITextAutocapitalizationTypeSentences;
@@ -272,6 +280,8 @@ static UITextAutocapitalizationType ToUITextAutocapitalizationType(NSString* inp
     [_textInputDelegate performAction:FlutterTextInputActionDone withClient:_textInputClient];
     return NO;
   }
+  if (self.returnKeyType == UIReturnKeyDefault && [text isEqualToString:@"\n"])
+    [_textInputDelegate performAction:FlutterTextInputActionNewline withClient:_textInputClient];
   return YES;
 }
 
@@ -569,6 +579,7 @@ static UITextAutocapitalizationType ToUITextAutocapitalizationType(NSString* inp
 
 - (void)setTextInputClient:(int)client withConfiguration:(NSDictionary*)configuration {
   _view.keyboardType = ToUIKeyboardType(configuration[@"inputType"]);
+  _view.returnKeyType = ToUIReturnKeyType(configuration[@"inputType"]);
   _view.autocapitalizationType = ToUITextAutocapitalizationType(configuration[@"inputType"]);
   _view.secureTextEntry = [configuration[@"obscureText"] boolValue];
   NSString* autocorrect = configuration[@"autocorrect"];

shell/platform/darwin/ios/framework/Source/FlutterViewController.mm

@@ -626,6 +626,9 @@ static inline blink::PointerData::DeviceKind DeviceKindFromTouchType(UITouch* to
     case FlutterTextInputActionDone:
       actionString = @"TextInputAction.done";
       break;
+    case FlutterTextInputActionNewline:
+      actionString = @"TextInputAction.newline";
+      break;
   }
   [_textInputChannel.get() invokeMethod:@"TextInputClient.performAction"
                               arguments:@[ @(client), actionString ]];