[WIP] Add support for Android SuggestionSpans when editing text

content/browser/renderer_host/ime_adapter_android.cc

Index: content/browser/renderer_host/ime_adapter_android.cc
diff --git a/content/browser/renderer_host/ime_adapter_android.cc b/content/browser/renderer_host/ime_adapter_android.cc
index 3a7d18b94da7ce41b8a4981e98e7d87b3eda70cc..64d75c0497131d71f611c524f274d9e4252292c2 100644
--- a/content/browser/renderer_host/ime_adapter_android.cc
+++ b/content/browser/renderer_host/ime_adapter_android.cc
@@ -30,10 +30,15 @@
 #include "third_party/WebKit/public/platform/WebInputEvent.h"
 #include "third_party/WebKit/public/platform/WebTextInputType.h"
 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
+#include "third_party/WebKit/public/web/WebTextSuggestionInfo.h"
 
 using base::android::AttachCurrentThread;
 using base::android::ConvertJavaStringToUTF16;
+using base::android::ConvertUTF8ToJavaString;
+using base::android::GetClass;
+using base::android::MethodID;
 using base::android::JavaParamRef;
+using base::android::ScopedJavaLocalRef;
 
 namespace content {
 namespace {
@@ -88,6 +93,31 @@ void AppendBackgroundColorSpan(JNIEnv*,
                                      static_cast<unsigned>(background_color)));
 }
 
+// Callback from Java to convert SuggestionSpan data to a
+// blink::WebCompositionUnderline instance, and append it to |underlines_ptr|.
+void AppendSuggestionSpan(JNIEnv* env,
+                          const JavaParamRef<jclass>&,
+                          jlong underlines_ptr,
+                          jint start,
+                          jint end,
+                          jint underline_color,
+                          jint flags,
+                          const JavaParamRef<jobjectArray>& suggestions) {
+  DCHECK_GE(start, 0);
+  DCHECK_GE(end, 0);
+  std::vector<blink::WebCompositionUnderline>* underlines =
+      reinterpret_cast<std::vector<blink::WebCompositionUnderline>*>(
+          underlines_ptr);
+
+  std::vector<std::string> suggestions_vec;
+  AppendJavaStringArrayToStringVector(env, suggestions, &suggestions_vec);
+
+  underlines->push_back(blink::WebCompositionUnderline(
+      static_cast<unsigned>(start), static_cast<unsigned>(end),
+      static_cast<unsigned>(underline_color), true, SK_ColorTRANSPARENT,
+      suggestions_vec));
+}
+
 // Callback from Java to convert UnderlineSpan data to a
 // blink::WebCompositionUnderline instance, and append it to |underlines_ptr|.
 void AppendUnderlineSpan(JNIEnv*,
@@ -259,6 +289,36 @@ void ImeAdapterAndroid::SetCharacterBounds(
                                                 coordinates_array_size));
 }
 
+void ImeAdapterAndroid::ShowTextSuggestionMenu(
+    const std::vector<blink::WebTextSuggestionInfo>& suggestion_infos) {
+  JNIEnv* env = AttachCurrentThread();
+  ScopedJavaLocalRef<jobject> obj = java_ime_adapter_.get(env);
+
+  ScopedJavaLocalRef<jclass> clazz =
+      GetClass(env, "org/chromium/content/browser/input/SuggestionInfo");
+  jmethodID constructor = MethodID::Get<MethodID::TYPE_INSTANCE>(
+      env, clazz.obj(), "<init>",
+      "(IILjava/lang/String;Ljava/lang/String;Ljava/lang/String;)V");
+  ScopedJavaLocalRef<jobjectArray> suggestion_infos_for_java(
+      env, env->NewObjectArray(suggestion_infos.size(), clazz.obj(), nullptr));
+
+  for (size_t i = 0; i < suggestion_infos.size(); i++) {
+    const blink::WebTextSuggestionInfo& suggestion_info = suggestion_infos[i];
+    ScopedJavaLocalRef<jobject> suggestion_info_for_java(
+        env,
+        env->NewObject(
+            clazz.obj(), constructor, suggestion_info.documentMarkerID,
+            suggestion_info.suggestionIndex,
+            ConvertUTF8ToJavaString(env, suggestion_info.prefix).obj(),
+            ConvertUTF8ToJavaString(env, suggestion_info.suggestion).obj(),
+            ConvertUTF8ToJavaString(env, suggestion_info.suffix).obj()));
+    env->SetObjectArrayElement(suggestion_infos_for_java.obj(), i,
+                               suggestion_info_for_java.obj());
+  }
+
+  Java_ImeAdapter_showSuggestionMenu(env, obj, suggestion_infos_for_java.obj());
+}
+
 void ImeAdapterAndroid::SetComposingRegion(JNIEnv*,
                                            const JavaParamRef<jobject>&,
                                            int start,
@@ -307,6 +367,36 @@ void ImeAdapterAndroid::RequestCursorUpdate(
       rwhi->GetRoutingID(), immediate_request, monitor_request));
 }
 
+void ImeAdapterAndroid::ApplySuggestionReplacement(JNIEnv*,
+                                                   const JavaParamRef<jobject>&,
+                                                   int documentMarkerID,
+                                                   int suggestionIndex) {
+  RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
+  if (!rwhi)
+    return;
+
+  rwhi->ApplySuggestionReplacement(documentMarkerID, suggestionIndex);
+}
+
+void ImeAdapterAndroid::DeleteSuggestionHighlight(
+    JNIEnv*,
+    const JavaParamRef<jobject>&) {
+  RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
+  if (!rwhi)
+    return;
+
+  rwhi->DeleteSuggestionHighlight();
+}
+
+void ImeAdapterAndroid::SuggestionMenuClosed(JNIEnv*,
+                                             const JavaParamRef<jobject>&) {
+  RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
+  if (!rwhi)
+    return;
+
+  rwhi->SuggestionMenuClosed();
+}
+
 void ImeAdapterAndroid::ResetImeAdapter(JNIEnv* env,
                                         const JavaParamRef<jobject>&) {
   java_ime_adapter_.reset();