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