src/content/browser/renderer_host/ime_adapter_android.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/renderer_host/ime_adapter_android.h"
   6
   7 #include <android/input.h>
   8
   9 #include "base/android/jni_android.h"
  10 #include "base/android/jni_string.h"
  11 #include "base/android/scoped_java_ref.h"
  12 #include "base/strings/utf_string_conversions.h"
  13 #include "base/time/time.h"
  14 #include "content/browser/frame_host/frame_tree.h"
  15 #include "content/browser/frame_host/frame_tree_node.h"
  16 #include "content/browser/frame_host/render_frame_host_impl.h"
  17 #include "content/browser/renderer_host/render_view_host_delegate.h"
  18 #include "content/browser/renderer_host/render_view_host_impl.h"
  19 #include "content/browser/renderer_host/render_widget_host_impl.h"
  20 #include "content/browser/renderer_host/render_widget_host_view_android.h"
  21 #include "content/common/frame_messages.h"
  22 #include "content/common/view_messages.h"
  23 #include "content/public/browser/browser_thread.h"
  24 #include "content/public/browser/native_web_keyboard_event.h"
  25 #include "jni/ImeAdapter_jni.h"
  26 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  27 #include "third_party/WebKit/public/web/WebInputEvent.h"
  28
  29 using base::android::AttachCurrentThread;
  30 using base::android::ConvertJavaStringToUTF16;
  31
  32 namespace content {
  33 namespace {
  34
  35 // Maps a java KeyEvent into a NativeWebKeyboardEvent.
  36 // |java_key_event| is used to maintain a globalref for KeyEvent.
  37 // |action| will help determine the WebInputEvent type.
  38 // type, |modifiers|, |time_ms|, |key_code|, |unicode_char| is used to create
  39 // WebKeyboardEvent. |key_code| is also needed ad need to treat the enter key
  40 // as a key press of character \r.
  41 NativeWebKeyboardEvent NativeWebKeyboardEventFromKeyEvent(
  42     JNIEnv* env,
  43     jobject java_key_event,
  44     int action,
  45     int modifiers,
  46     long time_ms,
  47     int key_code,
  48     bool is_system_key,
  49     int unicode_char) {
  50   blink::WebInputEvent::Type type = blink::WebInputEvent::Undefined;
  51   if (action == AKEY_EVENT_ACTION_DOWN)
  52     type = blink::WebInputEvent::RawKeyDown;
  53   else if (action == AKEY_EVENT_ACTION_UP)
  54     type = blink::WebInputEvent::KeyUp;
  55   return NativeWebKeyboardEvent(java_key_event, type, modifiers,
  56       time_ms / 1000.0, key_code, unicode_char, is_system_key);
  57 }
  58
  59 }  // anonymous namespace
  60
  61 bool RegisterImeAdapter(JNIEnv* env) {
  62   if (!RegisterNativesImpl(env))
  63     return false;
  64
  65   Java_ImeAdapter_initializeWebInputEvents(env,
  66                                            blink::WebInputEvent::RawKeyDown,
  67                                            blink::WebInputEvent::KeyUp,
  68                                            blink::WebInputEvent::Char,
  69                                            blink::WebInputEvent::ShiftKey,
  70                                            blink::WebInputEvent::AltKey,
  71                                            blink::WebInputEvent::ControlKey,
  72                                            blink::WebInputEvent::CapsLockOn,
  73                                            blink::WebInputEvent::NumLockOn);
  74   Java_ImeAdapter_initializeTextInputTypes(
  75       env,
  76       ui::TEXT_INPUT_TYPE_NONE,
  77       ui::TEXT_INPUT_TYPE_TEXT,
  78       ui::TEXT_INPUT_TYPE_TEXT_AREA,
  79       ui::TEXT_INPUT_TYPE_PASSWORD,
  80       ui::TEXT_INPUT_TYPE_SEARCH,
  81       ui::TEXT_INPUT_TYPE_URL,
  82       ui::TEXT_INPUT_TYPE_EMAIL,
  83       ui::TEXT_INPUT_TYPE_TELEPHONE,
  84       ui::TEXT_INPUT_TYPE_NUMBER,
  85       ui::TEXT_INPUT_TYPE_CONTENT_EDITABLE);
  86   return true;
  87 }
  88
  89 ImeAdapterAndroid::ImeAdapterAndroid(RenderWidgetHostViewAndroid* rwhva)
  90     : rwhva_(rwhva) {
  91 }
  92
  93 ImeAdapterAndroid::~ImeAdapterAndroid() {
  94   JNIEnv* env = AttachCurrentThread();
  95   base::android::ScopedJavaLocalRef<jobject> obj = java_ime_adapter_.get(env);
  96   if (!obj.is_null())
  97     Java_ImeAdapter_detach(env, obj.obj());
  98 }
  99
 100 bool ImeAdapterAndroid::SendSyntheticKeyEvent(JNIEnv*,
 101                                               jobject,
 102                                               int type,
 103                                               long time_ms,
 104                                               int key_code,
 105                                               int text) {
 106   NativeWebKeyboardEvent event(static_cast<blink::WebInputEvent::Type>(type),
 107                                0 /* modifiers */, time_ms / 1000.0, key_code,
 108                                text, false /* is_system_key */);
 109   rwhva_->SendKeyEvent(event);
 110   return true;
 111 }
 112
 113 bool ImeAdapterAndroid::SendKeyEvent(JNIEnv* env, jobject,
 114                                      jobject original_key_event,
 115                                      int action, int modifiers,
 116                                      long time_ms, int key_code,
 117                                      bool is_system_key, int unicode_char) {
 118   NativeWebKeyboardEvent event = NativeWebKeyboardEventFromKeyEvent(
 119           env, original_key_event, action, modifiers,
 120           time_ms, key_code, is_system_key, unicode_char);
 121   bool key_down_text_insertion =
 122       event.type == blink::WebInputEvent::RawKeyDown && event.text[0];
 123   // If we are going to follow up with a synthetic Char event, then that's the
 124   // one we expect to test if it's handled or unhandled, so skip handling the
 125   // "real" event in the browser.
 126   event.skip_in_browser = key_down_text_insertion;
 127   rwhva_->SendKeyEvent(event);
 128   if (key_down_text_insertion) {
 129     // Send a Char event, but without an os_event since we don't want to
 130     // roundtrip back to java such synthetic event.
 131     NativeWebKeyboardEvent char_event(blink::WebInputEvent::Char, modifiers,
 132                                       time_ms / 1000.0, key_code, unicode_char,
 133                                       is_system_key);
 134     char_event.skip_in_browser = key_down_text_insertion;
 135     rwhva_->SendKeyEvent(char_event);
 136   }
 137   return true;
 138 }
 139
 140 void ImeAdapterAndroid::SetComposingText(JNIEnv* env, jobject, jstring text,
 141                                          int new_cursor_pos) {
 142   RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
 143   if (!rwhi)
 144     return;
 145
 146   base::string16 text16 = ConvertJavaStringToUTF16(env, text);
 147   std::vector<blink::WebCompositionUnderline> underlines;
 148   underlines.push_back(
 149       blink::WebCompositionUnderline(0, text16.length(), SK_ColorBLACK,
 150                                       false));
 151   // new_cursor_position is as described in the Android API for
 152   // InputConnection#setComposingText, whereas the parameters for
 153   // ImeSetComposition are relative to the start of the composition.
 154   if (new_cursor_pos > 0)
 155     new_cursor_pos = text16.length() + new_cursor_pos - 1;
 156
 157   rwhi->ImeSetComposition(text16, underlines, new_cursor_pos, new_cursor_pos);
 158 }
 159
 160 void ImeAdapterAndroid::CommitText(JNIEnv* env, jobject, jstring text) {
 161   RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
 162   if (!rwhi)
 163     return;
 164
 165   base::string16 text16 = ConvertJavaStringToUTF16(env, text);
 166   rwhi->ImeConfirmComposition(text16, gfx::Range::InvalidRange(), false);
 167 }
 168
 169 void ImeAdapterAndroid::FinishComposingText(JNIEnv* env, jobject) {
 170   RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
 171   if (!rwhi)
 172     return;
 173
 174   rwhi->ImeConfirmComposition(base::string16(), gfx::Range::InvalidRange(),
 175                               true);
 176 }
 177
 178 void ImeAdapterAndroid::AttachImeAdapter(JNIEnv* env, jobject java_object) {
 179   java_ime_adapter_ = JavaObjectWeakGlobalRef(env, java_object);
 180 }
 181
 182 void ImeAdapterAndroid::CancelComposition() {
 183   base::android::ScopedJavaLocalRef<jobject> obj =
 184       java_ime_adapter_.get(AttachCurrentThread());
 185   if (!obj.is_null())
 186     Java_ImeAdapter_cancelComposition(AttachCurrentThread(), obj.obj());
 187 }
 188
 189 void ImeAdapterAndroid::FocusedNodeChanged(bool is_editable_node) {
 190   base::android::ScopedJavaLocalRef<jobject> obj =
 191       java_ime_adapter_.get(AttachCurrentThread());
 192   if (!obj.is_null()) {
 193     Java_ImeAdapter_focusedNodeChanged(AttachCurrentThread(),
 194                                        obj.obj(),
 195                                        is_editable_node);
 196   }
 197 }
 198
 199 void ImeAdapterAndroid::SetEditableSelectionOffsets(JNIEnv*, jobject,
 200                                                     int start, int end) {
 201   RenderFrameHost* rfh = GetFocusedFrame();
 202   if (!rfh)
 203     return;
 204
 205   rfh->Send(new FrameMsg_SetEditableSelectionOffsets(rfh->GetRoutingID(),
 206                                                      start, end));
 207 }
 208
 209 void ImeAdapterAndroid::SetComposingRegion(JNIEnv*, jobject,
 210                                            int start, int end) {
 211   RenderFrameHost* rfh = GetFocusedFrame();
 212   if (!rfh)
 213     return;
 214
 215   std::vector<blink::WebCompositionUnderline> underlines;
 216   underlines.push_back(
 217       blink::WebCompositionUnderline(0, end - start, SK_ColorBLACK, false));
 218
 219   rfh->Send(new FrameMsg_SetCompositionFromExistingText(
 220       rfh->GetRoutingID(), start, end, underlines));
 221 }
 222
 223 void ImeAdapterAndroid::DeleteSurroundingText(JNIEnv*, jobject,
 224                                               int before, int after) {
 225   RenderFrameHostImpl* rfh =
 226       static_cast<RenderFrameHostImpl*>(GetFocusedFrame());
 227   if (rfh)
 228     rfh->ExtendSelectionAndDelete(before, after);
 229 }
 230
 231 void ImeAdapterAndroid::Unselect(JNIEnv* env, jobject) {
 232   RenderFrameHost* rfh = GetFocusedFrame();
 233   if (rfh)
 234     rfh->Unselect();
 235 }
 236
 237 void ImeAdapterAndroid::SelectAll(JNIEnv* env, jobject) {
 238   RenderFrameHost* rfh = GetFocusedFrame();
 239   if (rfh)
 240     rfh->SelectAll();
 241 }
 242
 243 void ImeAdapterAndroid::Cut(JNIEnv* env, jobject) {
 244   RenderFrameHost* rfh = GetFocusedFrame();
 245   if (rfh)
 246     rfh->Cut();
 247 }
 248
 249 void ImeAdapterAndroid::Copy(JNIEnv* env, jobject) {
 250   RenderFrameHost* rfh = GetFocusedFrame();
 251   if (rfh)
 252     rfh->Copy();
 253 }
 254
 255 void ImeAdapterAndroid::Paste(JNIEnv* env, jobject) {
 256   RenderFrameHost* rfh = GetFocusedFrame();
 257   if (rfh)
 258     rfh->Paste();
 259 }
 260
 261 void ImeAdapterAndroid::ResetImeAdapter(JNIEnv* env, jobject) {
 262   java_ime_adapter_.reset();
 263 }
 264
 265 RenderWidgetHostImpl* ImeAdapterAndroid::GetRenderWidgetHostImpl() {
 266   DCHECK(BrowserThread::CurrentlyOn(BrowserThread::UI));
 267   DCHECK(rwhva_);
 268   RenderWidgetHost* rwh = rwhva_->GetRenderWidgetHost();
 269   if (!rwh)
 270     return NULL;
 271
 272   return RenderWidgetHostImpl::From(rwh);
 273 }
 274
 275 RenderFrameHost* ImeAdapterAndroid::GetFocusedFrame() {
 276   RenderWidgetHostImpl* rwh = GetRenderWidgetHostImpl();
 277   if (!rwh)
 278     return NULL;
 279   if (!rwh->IsRenderView())
 280     return NULL;
 281   RenderViewHost* rvh = RenderViewHost::From(rwh);
 282   FrameTreeNode* focused_frame =
 283       rvh->GetDelegate()->GetFrameTree()->GetFocusedFrame();
 284   if (!focused_frame)
 285     return NULL;
 286
 287   return focused_frame->current_frame_host();
 288 }
 289
 290 }  // namespace content