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 <algorithm>
   8 #include <android/input.h>
   9 #include <vector>
  10
  11 #include "base/android/jni_android.h"
  12 #include "base/android/jni_string.h"
  13 #include "base/android/scoped_java_ref.h"
  14 #include "base/strings/utf_string_conversions.h"
  15 #include "base/time/time.h"
  16 #include "content/browser/frame_host/frame_tree.h"
  17 #include "content/browser/frame_host/frame_tree_node.h"
  18 #include "content/browser/frame_host/render_frame_host_impl.h"
  19 #include "content/browser/renderer_host/render_view_host_delegate.h"
  20 #include "content/browser/renderer_host/render_view_host_impl.h"
  21 #include "content/browser/renderer_host/render_widget_host_impl.h"
  22 #include "content/browser/renderer_host/render_widget_host_view_android.h"
  23 #include "content/common/frame_messages.h"
  24 #include "content/common/input_messages.h"
  25 #include "content/common/view_messages.h"
  26 #include "content/public/browser/browser_thread.h"
  27 #include "content/public/browser/native_web_keyboard_event.h"
  28 #include "content/public/browser/web_contents.h"
  29 #include "jni/ImeAdapter_jni.h"
  30 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  31 #include "third_party/WebKit/public/web/WebInputEvent.h"
  32 #include "third_party/WebKit/public/web/WebTextInputType.h"
  33
  34 using base::android::AttachCurrentThread;
  35 using base::android::ConvertJavaStringToUTF16;
  36
  37 namespace content {
  38 namespace {
  39
  40 // Maps a java KeyEvent into a NativeWebKeyboardEvent.
  41 // |java_key_event| is used to maintain a globalref for KeyEvent.
  42 // |action| will help determine the WebInputEvent type.
  43 // type, |modifiers|, |time_ms|, |key_code|, |unicode_char| is used to create
  44 // WebKeyboardEvent. |key_code| is also needed ad need to treat the enter key
  45 // as a key press of character \r.
  46 NativeWebKeyboardEvent NativeWebKeyboardEventFromKeyEvent(
  47     JNIEnv* env,
  48     jobject java_key_event,
  49     int action,
  50     int modifiers,
  51     long time_ms,
  52     int key_code,
  53     bool is_system_key,
  54     int unicode_char) {
  55   blink::WebInputEvent::Type type = blink::WebInputEvent::Undefined;
  56   if (action == AKEY_EVENT_ACTION_DOWN)
  57     type = blink::WebInputEvent::RawKeyDown;
  58   else if (action == AKEY_EVENT_ACTION_UP)
  59     type = blink::WebInputEvent::KeyUp;
  60   else
  61     NOTREACHED() << "Invalid Android key event action: " << action;
  62   return NativeWebKeyboardEvent(java_key_event, type, modifiers,
  63       time_ms / 1000.0, key_code, unicode_char, is_system_key);
  64 }
  65
  66 }  // anonymous namespace
  67
  68 bool RegisterImeAdapter(JNIEnv* env) {
  69   return RegisterNativesImpl(env);
  70 }
  71
  72 // Callback from Java to convert BackgroundColorSpan data to a
  73 // blink::WebCompositionUnderline instance, and append it to |underlines_ptr|.
  74 void AppendBackgroundColorSpan(JNIEnv*,
  75                                jclass,
  76                                jlong underlines_ptr,
  77                                jint start,
  78                                jint end,
  79                                jint background_color) {
  80   DCHECK_GE(start, 0);
  81   DCHECK_GE(end, 0);
  82   // Do not check |background_color|.
  83   std::vector<blink::WebCompositionUnderline>* underlines =
  84       reinterpret_cast<std::vector<blink::WebCompositionUnderline>*>(
  85           underlines_ptr);
  86   underlines->push_back(
  87       blink::WebCompositionUnderline(static_cast<unsigned>(start),
  88                                      static_cast<unsigned>(end),
  89                                      SK_ColorTRANSPARENT,
  90                                      false,
  91                                      static_cast<unsigned>(background_color)));
  92 }
  93
  94 // Callback from Java to convert UnderlineSpan data to a
  95 // blink::WebCompositionUnderline instance, and append it to |underlines_ptr|.
  96 void AppendUnderlineSpan(JNIEnv*,
  97                          jclass,
  98                          jlong underlines_ptr,
  99                          jint start,
 100                          jint end) {
 101   DCHECK_GE(start, 0);
 102   DCHECK_GE(end, 0);
 103   std::vector<blink::WebCompositionUnderline>* underlines =
 104       reinterpret_cast<std::vector<blink::WebCompositionUnderline>*>(
 105           underlines_ptr);
 106   underlines->push_back(
 107       blink::WebCompositionUnderline(static_cast<unsigned>(start),
 108                                      static_cast<unsigned>(end),
 109                                      SK_ColorBLACK,
 110                                      false,
 111                                      SK_ColorTRANSPARENT));
 112 }
 113
 114 ImeAdapterAndroid::ImeAdapterAndroid(RenderWidgetHostViewAndroid* rwhva)
 115     : rwhva_(rwhva) {
 116 }
 117
 118 ImeAdapterAndroid::~ImeAdapterAndroid() {
 119   JNIEnv* env = AttachCurrentThread();
 120   base::android::ScopedJavaLocalRef<jobject> obj = java_ime_adapter_.get(env);
 121   if (!obj.is_null())
 122     Java_ImeAdapter_detach(env, obj.obj());
 123 }
 124
 125 bool ImeAdapterAndroid::SendSyntheticKeyEvent(JNIEnv*,
 126                                               jobject,
 127                                               int type,
 128                                               long time_ms,
 129                                               int key_code,
 130                                               int modifiers,
 131                                               int text) {
 132   NativeWebKeyboardEvent event(static_cast<blink::WebInputEvent::Type>(type),
 133                                modifiers, time_ms / 1000.0, key_code,
 134                                text, false /* is_system_key */);
 135   rwhva_->SendKeyEvent(event);
 136   return true;
 137 }
 138
 139 bool ImeAdapterAndroid::SendKeyEvent(JNIEnv* env, jobject,
 140                                      jobject original_key_event,
 141                                      int action, int modifiers,
 142                                      long time_ms, int key_code,
 143                                      bool is_system_key, int unicode_char) {
 144   NativeWebKeyboardEvent event = NativeWebKeyboardEventFromKeyEvent(
 145           env, original_key_event, action, modifiers,
 146           time_ms, key_code, is_system_key, unicode_char);
 147   bool key_down_text_insertion =
 148       event.type == blink::WebInputEvent::RawKeyDown && event.text[0];
 149   // If we are going to follow up with a synthetic Char event, then that's the
 150   // one we expect to test if it's handled or unhandled, so skip handling the
 151   // "real" event in the browser.
 152   event.skip_in_browser = key_down_text_insertion;
 153   rwhva_->SendKeyEvent(event);
 154   if (key_down_text_insertion) {
 155     // Send a Char event, but without an os_event since we don't want to
 156     // roundtrip back to java such synthetic event.
 157     NativeWebKeyboardEvent char_event(blink::WebInputEvent::Char, modifiers,
 158                                       time_ms / 1000.0, key_code, unicode_char,
 159                                       is_system_key);
 160     char_event.skip_in_browser = key_down_text_insertion;
 161     rwhva_->SendKeyEvent(char_event);
 162   }
 163   return true;
 164 }
 165
 166 void ImeAdapterAndroid::SetComposingText(JNIEnv* env,
 167                                          jobject obj,
 168                                          jobject text,
 169                                          jstring text_str,
 170                                          int new_cursor_pos) {
 171   RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
 172   if (!rwhi)
 173     return;
 174
 175   base::string16 text16 = ConvertJavaStringToUTF16(env, text_str);
 176
 177   std::vector<blink::WebCompositionUnderline> underlines;
 178   // Iterate over spans in |text|, dispatch those that we care about (e.g.,
 179   // BackgroundColorSpan) to a matching callback (e.g.,
 180   // AppendBackgroundColorSpan()), and populate |underlines|.
 181   Java_ImeAdapter_populateUnderlinesFromSpans(
 182       env, obj, text, reinterpret_cast<jlong>(&underlines));
 183
 184   // Default to plain underline if we didn't find any span that we care about.
 185   if (underlines.empty()) {
 186     underlines.push_back(blink::WebCompositionUnderline(
 187         0, text16.length(), SK_ColorBLACK, false, SK_ColorTRANSPARENT));
 188   }
 189   // Sort spans by |.startOffset|.
 190   std::sort(underlines.begin(), underlines.end());
 191
 192   // new_cursor_position is as described in the Android API for
 193   // InputConnection#setComposingText, whereas the parameters for
 194   // ImeSetComposition are relative to the start of the composition.
 195   if (new_cursor_pos > 0)
 196     new_cursor_pos = text16.length() + new_cursor_pos - 1;
 197
 198   rwhi->ImeSetComposition(text16, underlines, new_cursor_pos, new_cursor_pos);
 199 }
 200
 201 void ImeAdapterAndroid::CommitText(JNIEnv* env, jobject, jstring text_str) {
 202   RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
 203   if (!rwhi)
 204     return;
 205
 206   base::string16 text16 = ConvertJavaStringToUTF16(env, text_str);
 207   rwhi->ImeConfirmComposition(text16, gfx::Range::InvalidRange(), false);
 208 }
 209
 210 void ImeAdapterAndroid::FinishComposingText(JNIEnv* env, jobject) {
 211   RenderWidgetHostImpl* rwhi = GetRenderWidgetHostImpl();
 212   if (!rwhi)
 213     return;
 214
 215   rwhi->ImeConfirmComposition(base::string16(), gfx::Range::InvalidRange(),
 216                               true);
 217 }
 218
 219 void ImeAdapterAndroid::AttachImeAdapter(JNIEnv* env, jobject java_object) {
 220   java_ime_adapter_ = JavaObjectWeakGlobalRef(env, java_object);
 221 }
 222
 223 void ImeAdapterAndroid::CancelComposition() {
 224   base::android::ScopedJavaLocalRef<jobject> obj =
 225       java_ime_adapter_.get(AttachCurrentThread());
 226   if (!obj.is_null())
 227     Java_ImeAdapter_cancelComposition(AttachCurrentThread(), obj.obj());
 228 }
 229
 230 void ImeAdapterAndroid::FocusedNodeChanged(bool is_editable_node) {
 231   base::android::ScopedJavaLocalRef<jobject> obj =
 232       java_ime_adapter_.get(AttachCurrentThread());
 233   if (!obj.is_null()) {
 234     Java_ImeAdapter_focusedNodeChanged(AttachCurrentThread(),
 235                                        obj.obj(),
 236                                        is_editable_node);
 237   }
 238 }
 239
 240 void ImeAdapterAndroid::SetEditableSelectionOffsets(JNIEnv*, jobject,
 241                                                     int start, int end) {
 242   RenderFrameHost* rfh = GetFocusedFrame();
 243   if (!rfh)
 244     return;
 245
 246   rfh->Send(new FrameMsg_SetEditableSelectionOffsets(rfh->GetRoutingID(),
 247                                                      start, end));
 248 }
 249
 250 void ImeAdapterAndroid::SetComposingRegion(JNIEnv*, jobject,
 251                                            int start, int end) {
 252   RenderFrameHost* rfh = GetFocusedFrame();
 253   if (!rfh)
 254     return;
 255
 256   std::vector<blink::WebCompositionUnderline> underlines;
 257   underlines.push_back(blink::WebCompositionUnderline(
 258       0, end - start, SK_ColorBLACK, false, SK_ColorTRANSPARENT));
 259
 260   rfh->Send(new InputMsg_SetCompositionFromExistingText(
 261       rfh->GetRoutingID(), start, end, underlines));
 262 }
 263
 264 void ImeAdapterAndroid::DeleteSurroundingText(JNIEnv*, jobject,
 265                                               int before, int after) {
 266   RenderFrameHostImpl* rfh =
 267       static_cast<RenderFrameHostImpl*>(GetFocusedFrame());
 268   if (rfh)
 269     rfh->ExtendSelectionAndDelete(before, after);
 270 }
 271
 272 void ImeAdapterAndroid::Unselect(JNIEnv* env, jobject) {
 273   WebContents* wc = GetWebContents();
 274   if (wc)
 275     wc->Unselect();
 276 }
 277
 278 void ImeAdapterAndroid::SelectAll(JNIEnv* env, jobject) {
 279   WebContents* wc = GetWebContents();
 280   if (wc)
 281     wc->SelectAll();
 282 }
 283
 284 void ImeAdapterAndroid::Cut(JNIEnv* env, jobject) {
 285   WebContents* wc = GetWebContents();
 286   if (wc)
 287     wc->Cut();
 288 }
 289
 290 void ImeAdapterAndroid::Copy(JNIEnv* env, jobject) {
 291   WebContents* wc = GetWebContents();
 292   if (wc)
 293     wc->Copy();
 294 }
 295
 296 void ImeAdapterAndroid::Paste(JNIEnv* env, jobject) {
 297   WebContents* wc = GetWebContents();
 298   if (wc)
 299     wc->Paste();
 300 }
 301
 302 void ImeAdapterAndroid::ResetImeAdapter(JNIEnv* env, jobject) {
 303   java_ime_adapter_.reset();
 304 }
 305
 306 RenderWidgetHostImpl* ImeAdapterAndroid::GetRenderWidgetHostImpl() {
 307   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 308   DCHECK(rwhva_);
 309   RenderWidgetHost* rwh = rwhva_->GetRenderWidgetHost();
 310   if (!rwh)
 311     return NULL;
 312
 313   return RenderWidgetHostImpl::From(rwh);
 314 }
 315
 316 RenderFrameHost* ImeAdapterAndroid::GetFocusedFrame() {
 317   RenderWidgetHostImpl* rwh = GetRenderWidgetHostImpl();
 318   if (!rwh)
 319     return NULL;
 320   if (!rwh->IsRenderView())
 321     return NULL;
 322   RenderViewHost* rvh = RenderViewHost::From(rwh);
 323   FrameTreeNode* focused_frame =
 324       rvh->GetDelegate()->GetFrameTree()->GetFocusedFrame();
 325   if (!focused_frame)
 326     return NULL;
 327
 328   return focused_frame->current_frame_host();
 329 }
 330
 331 WebContents* ImeAdapterAndroid::GetWebContents() {
 332   RenderWidgetHostImpl* rwh = GetRenderWidgetHostImpl();
 333   if (!rwh)
 334     return NULL;
 335   if (!rwh->IsRenderView())
 336     return NULL;
 337   return WebContents::FromRenderViewHost(RenderViewHost::From(rwh));
 338 }
 339
 340 }  // namespace content